Patent Application
20250135262
This disclosure relates to a load transmission mechanism unit for a training machine and a training machine using the same.
There are various types of training machines that a user uses to train various portions including the shoulders, the arms, the back and the legs. For example, Japanese Laid-Open Patent Publication No. 2006-187317 discloses a training machine capable of exercising an arm of a user.
When using the training machine disclosed in JP 2006-187317 A, the user may obtain flexible and elastic muscles associated with the shoulders, the arms, and the back, for example, without a muscle hardening while eliminating a burden on the body, such as muscle pain, and fatigue.
The training machine disclosed in JP 2006-187317 A includes a load transmission mechanism unit provided between a wire extending from a weight on the side of the training machine and a gripping portion the user grips. The load transmission mechanism unit called a lifting-swinging member is equipped with rotary shafts, and gears, for example. Compared with a training machine in which the weight and the gripping portion the user grips are connected directly to each other by wires, the training machine disclosed in JP 2006-187317 A includes the lifting-swinging member (the load transmission mechanism unit), which may increase a load generated by a turning motion of the arm that the user is trying to train. Therefore, the user may not only train his/her muscles in a simple direction, but also use muscles around a bone of his/her arm more by taking a turning motion accompanying the load. This makes it possible for the user to obtain muscle strength with flexibility and elasticity.
I conducted intensive studies on the lifting-swinging member (the load transmitting mechanism unit) of the training machine disclosed in JP 2006-187317 A. As a result, I completed improvement to apply a load in various directions with respect to a shaft of the lifting-swinging member (the load transmission mechanism unit) to which the gripping portion held by the user is connected. For example, the load may be applied not only in a pulling direction and a turning direction, but also in a pushing direction. Further, I have improved the lifting-swinging member (the load transmission mechanism unit) to act on the motion of the arm of the user as well as the motion of the leg of the user.
It could therefore be helpful to provide a load transmission mechanism unit for a training machine, which is capable of applying a load with respect to a shaft constituting a load transmission mechanism unit in various directions to obtain muscles with good flexibility and elasticity, and the training machine employing the same.
Disclosed herein is a load transmission mechanism unit for a training machine according to a first aspect including: a main driving shaft portion having an end portion connected to an input portion to which a user inputs a force, and configured to rotate together with the input portion; an intermediate shaft portion configured to rotate in conjunction with the rotation of the main driving shaft portion; a first rotation transmission unit suspended between the main driving shaft portion and the intermediate shaft portion, and configured to transmit the rotations of the main driving shaft portion and the intermediate shaft portion to each other; a second rotation transmission unit provided between the intermediate shaft portion and a crank shaft portion which is orthogonal to the intermediate shaft portion, and configured to transmit the rotation of the intermediate shaft portion and a rotation of the crank shaft portion to each other; an inner housing configured to accommodate the main driving shaft portion, the intermediate shaft portion and the crank shaft portion; an outer housing configured to accommodate the inner housing and configured such that the inner housing moves along an axial direction of the crank shaft portion in an interior of the outer housing; a slide shaft portion disposed in the interior of the outer housing to be displaced in a direction perpendicular to the axial direction of the crank shaft portion and configured to be biased linearly by an external force; and a connection joint portion configured such that a rotation centered on a central axis orthogonal to an axial direction of the slide shaft portion, and a rotation in a direction orthogonal to the central axis are permitted by a combination of a plurality of connection pieces, in which one connection piece of the plurality of connection pieces is connected to the slide shaft portion. The connection joint portion is connected to the crank shaft portion such that the rotation centered on the central axis orthogonal to the axial direction of the crank shaft portion is permitted at another connection piece different from the one connection piece connected to the slide shaft portion, and is configured to convert the rotation and an axial movement of the crank shaft portion to a displacement in a vertical direction of the slide shaft portion. When the user horizontally moves the main driving shaft portion using the input portion, the external force applied to the slide shaft portion is transmitted to the input portion via the main driving shaft portion.
A load transmission mechanism unit for a training machine according to a second aspect includes: a main driving shaft portion having an end portion connected to an input portion to which a user inputs a force, and configured to rotate together with the input portion; an intermediate shaft portion configured to rotate in conjunction with the rotation of the main driving shaft portion; a first rotation transmission unit suspended between the main driving shaft portion and the intermediate shaft portion, and configured to transmit the rotations of the main driving shaft portion and the intermediate shaft portion to each other; a second rotation transmission unit provided between the intermediate shaft portion and a crank shaft portion which is orthogonal to the intermediate shaft portion, and configured to transmit the rotation of the intermediate shaft portion and a rotation of the crank shaft portion to each other; a connection fixing portion configured to connect the main driving shaft portion, the intermediate shaft portion and the crank shaft portion, and configured to transmit horizontal movements of the main driving shaft portion, the intermediate shaft portion and the crank shaft portion to each other; a slide shaft portion configured to be displaced in a direction perpendicular to the axial direction of the crank shaft portion and configured to be biased linearly by an external force; and a connection joint portion configured such that a rotation centered on a central axis orthogonal to an axial direction of the slide shaft portion, and a rotation in a direction orthogonal to the central axis are permitted by a combination of a plurality of connection pieces, in which one connection piece of the plurality of connection pieces is connected to the slide shaft portion. The connection joint portion is connected to the crank shaft portion such that the rotation centered on the central axis orthogonal to the axial direction of the crank shaft portion is permitted at another connection piece different from the one connection piece connected to the slide shaft portion, and is configured to convert the rotation and an axial movement of the crank shaft portion to a displacement in a vertical direction of the slide shaft portion. When the user horizontally moves the main driving shaft portion using the input portion, the external force applied to the slide shaft portion is transmitted to the input portion via the main driving shaft portion.
As a third aspect, in the load transmission mechanism unit for the training machine of the first aspect or the second aspect, the input portion may be a gripping portion the user grips or a footrest portion the user steps on.
As a fourth aspect, in the load transmission mechanism unit for the training machine of the first aspect or the second aspect, the connection joint portion may include a plurality of universal joints, which are connected to each other, as main members.
As a fifth aspect, the load transmission mechanism unit for the training machine of the first aspect may further include a connection portion provided in the outer housing and configured to connect the load transmission mechanism unit to the training machine. The inner housing may slide in the interior of the outer housing with the horizontal movement of the main driving shaft portion.
As a sixth aspect, the load transmission mechanism unit for the training machine of the second aspect may further include a connection portion configured to connect the load transmission mechanism unit to the training machine.
As a seventh aspect, in the load transmission mechanism unit for the training machine of the first aspect or the second aspect, the first rotation transmission unit may be a transmission chain. The main driving shaft portion may include a main-driving-shaft sprocket. The intermediate shaft portion may include an intermediate-shaft sprocket. The transmission chain may be suspended between the main-driving-shaft sprocket and the intermediate-shaft sprocket.
As an eighth aspect, in the load transmission mechanism unit for the training machine of the first aspect or the second aspect, the second rotation transmission unit may include an intermediate-shaft bevel gear provided in the intermediate-shaft portion, and a crank-shaft bevel gear provided in the crank shaft portion to be engaged with the intermediate-shaft bevel gear.
As a ninth aspect, in the load transmission mechanism unit for the training machine of the third aspect, the gripping portion may be an annular member.
As a tenth aspect, in the load transmission mechanism unit for the training machine of the first aspect or the second aspect, the external force may be generated by a load applying unit configured to be capable of adjusting a magnitude of a load of the training machine.
As an eleventh aspect, in the load transmission mechanism unit for the training machine of the first aspect or the second aspect, a slide bearing configured to pivotably support the slide shaft portion may include a bearing hole through which the slide shaft portion is obliquely inserted with respect to the axial direction of the crank shaft portion.
As a twelfth aspect, in the load transmission mechanism unit for the training machine of the first aspect or the second aspect, a slide bearing configured to pivotably support the slide shaft portion may include a first bearing hole through which the slide shaft portion is orthogonally inserted with respect to the axial direction of the crank shaft portion, and a second bearing hole through which the slide shaft portion is obliquely inserted with respect to the axial direction of the crank shaft portion, the second bearing hole intersecting the first bearing hole. The slide shaft portion may be configured to move between the first bearing hole and the second bearing hole with an axial movement of the crank shaft portion.
As a thirteenth aspect, in the load transmission mechanism unit for the training machine of the first aspect or the second aspect, a slide bearing configured to pivotably support the slide shaft portion may include a bearing hole formed in an inverted truncated conical shape.
As a fourteenth aspect, in the load transmission mechanism unit for the training machine of the first aspect or the second aspect, a slide bearing configured to pivotably support the slide shaft portion may include a narrow portion formed in an axial central portion thereof.
A training machine according to a fifteenth aspect may include the load transmission mechanism unit for the training machine according to the first aspect or the second aspect.
A load transmission mechanism unit for a training machine according to an example includes: a main driving shaft portion having an end portion connected to an input portion to which a user inputs a force, and configured to rotate together with the input portion; an intermediate shaft portion configured to rotate in conjunction with the rotation of the main driving shaft portion; a first rotation transmission unit suspended between the main driving shaft portion and the intermediate shaft portion, and configured to transmit the rotations of the main driving shaft portion and the intermediate shaft portion to each other; a second rotation transmission unit provided between the intermediate shaft portion and a crank shaft portion which is orthogonal to the intermediate shaft portion, and configured to transmit the rotation of the intermediate shaft portion and a rotation of the crank shaft portion to each other; an inner housing configured to accommodate the main driving shaft portion, the intermediate shaft portion and the crank shaft portion; an outer housing configured to accommodate the inner housing and configured such that the inner housing moves along an axial direction of the crank shaft portion in an interior of the outer housing; a slide shaft portion disposed in the interior of the outer housing to be displaced in a direction perpendicular to the axial direction of the crank shaft portion and configured to be biased linearly by an external force; and a connection joint portion configured such that a rotation centered on a central axis orthogonal to an axial direction of the slide shaft portion, and a rotation in a direction orthogonal to the central axis are permitted by a combination of a plurality of connection pieces, in which one connection piece of the plurality of connection pieces is connected to the slide shaft portion. The connection joint portion is connected to the crank shaft portion such that the rotation centered on the central axis orthogonal to the axial direction of the crank shaft portion is permitted at another connection piece different from the one connection piece connected to the slide shaft portion, and is configured to convert the rotation and an axial movement of the crank shaft portion to a displacement in a vertical direction of the slide shaft portion. When the user horizontally moves the main driving shaft portion using the input portion, the external force applied to the slide shaft portion is transmitted to the input portion via the main driving shaft portion. This makes it possible to provide a load transmission mechanism unit for a training machine capable of obtaining more flexible and elastic muscles, and the training machine using the same.
Features, advantages, and technical and industrial significance of exemplary embodiments of my units and machines will be described below with reference to the accompanying drawings, in which like numerals denote like elements.
A load transmission mechanism unit for training machine 1A according to a first example illustrated in
The load transmission mechanism units for training machine 1A, 1B, 1C, 1D, and 1E are mechanical members including mechanisms for transmitting loads such as weights, for example, at sides of the first training machine 100 and the second training machine 201 to a user who uses the training machines. Each of the load transmission mechanism units for training machine 1A, 1B, 1D, and 1E includes a gripping portion 11 (see
The gripping portion 11, a gripping portion 260 and the footrest portion 271 are input portions to which the user inputs force.
For example, the user grips the gripping portion 11 used as the input portion with his/her left and right hands while backs of his/her both hands of his/her both arms are oriented toward left and right sides of the first training machine 100 in an initial state (to be described later). Then, the user inputs the force to pull the gripping portion 11 down by lowering his/her both arms while gripping the gripping portion 11 with his/her both hands.
In addition, the user grips the gripping portion 11 used as the input portion with his/her left and right hands while backs of his/her both hands of his/her both arms are oriented toward the left and right sides of the first training machine 100 in the initial state. Then, the user inputs a force to turn the load transmission mechanism unit 1A outward to the gripping portion 11 used as the input portion by simultaneously opening his/her both arms outward to perform an open chest exercise while gripping the gripping portion 11 with his/her both hands and stretching his/her both arms.
In addition, the user sits on a right side of a seat 211 of the second training machine 201 in the initial state (to be described later). Then, the user lifts his/her right arm to grip the gripping portion 260. Subsequently, the user inputs a pulling force to the gripping portion 260 used as the input portion by forcefully lowering his/her right arm forward while holding the gripping portion 260 with his/her right hand.
Further, the user sits on the right side of the seat 211 of the second training machine 201 (to be described later) and places his/her left leg on the footrest portion 271 used as the input portion of the load transmission mechanism unit 1C to take a state in which his/her knee is bent. Then, the user inputs a pushing force to the footrest portion 271 by stretching his/her left foot.
With reference to
The inner housing 3 includes a main driving shaft portion 4, an intermediate shaft portion 5, and a crank shaft portion 6. The outer housing 2 includes a slide shaft portion 13. Power may be transmitted to the main driving shaft portion 4 and the slide shaft portion 13 via individual shaft portions provided between the main driving shaft portion 4 and the slide shaft portion 13.
In the load transmission mechanism unit for training machine 1A according to the first example, the individual shaft portions such as the main driving shaft portion 4, the intermediate shaft portion 5, and the crank shaft portion 6 are pivotably supported relative to the inner housing 3. As can be seen from
The slide shaft portion 13 may be displaced in a direction orthogonal to an axial direction of the crank shaft portion 6 and is disposed in the outer housing 2. The slide shaft portion 13 is biased in a linear direction by an external force.
The slide shaft portion 13 is pivotably supported relative to a slide bearing 13a provided in the outer housing 2, and may be displaced in a vertical direction in
A connection portion 7 is provided in the outer housing 2 to connect the load transmission mechanism unit for training machine 1A according to the first example to the first training machine 100 (to be described later) (see
The inner housing 3 of the load transmission mechanism unit for training machine 1A according to the first example is configured to move horizontally relative to the outer housing 2, the connection portion 7, and the guide strut 140. That is, the main driving shaft portion 4 provided in the inner housing 3 is movable horizontally relative to the outer housing 2, the connection portion 7, and the guide strut 140.
A connection joint portion 12 is configured such that a rotation centered on a first central axis 12g orthogonal to an axial direction of the slide shaft portion 13, and a rotation centered on a second central axis 12h orthogonal to the first central axis 12g is permitted by a combination of a plurality of connection pieces 30. One connection piece 30 (12e) among the plurality of connection pieces 30 is connected to the slide shaft portion 13.
A connection piece 30 (a third joint piece 12e) of the connection joint portion 12 is connected to a lower end portion (a first end portion 13b) of the slide shaft portion 13. The connection joint portion 12 is configured such that the rotation centered on the first central axis 12g orthogonal to the axial direction (the axial direction used herein is referred to as a direction in which an axis extends, or a longitudinal direction of the axis) of the slide shaft portion 13, and the rotation centered on the second central axis 12h orthogonal to the first central axis 12g are permitted by the combination of the plurality of connection pieces 30. One (the third joint piece 12e) among the plurality of connection pieces 30 (a first joint piece 12a, a second joint piece 12c, and the third joint piece 12e) is connected to the slide shaft portion 13.
A central axis such as the first central axis 12g, the second central axis 12h, the third central axis 12j, and a fourth central axis 12k is a rotational axis passing through a rotational center of the rotation. The same applies below.
In another connection piece 30 (the first joint piece 12a and the second joint piece 12c) different from one connection piece 30 (the third joint piece 12e) connected to the slide shaft portion 13, the connection joint portion 12 is connected to the crank shaft portion 6 such that the rotation centered on the central axis orthogonal to the axial direction of the crank shaft portion 6 is permitted. The connection joint portion 12 converts the rotation and axial movement of the crank shaft portion 6 into a vertical displacement of the slide shaft portion 13.
The connection joint portion 12 includes the first joint piece 12a, the second joint piece 12c, and the third joint piece 12e, which configure the connection piece 30. The first joint piece 12a and the second joint piece 12c are connected to each other by a first universal joint 12b which configures a universal joint 40. The second joint piece 12c and the third joint piece 12e are connected to each other by a second universal joint 12d which configures the universal joint 40.
The universal joint 40 may freely change an angle at which two rotational axes are joined to give an angle with respect to a rotational motion of one rotational axis such that the rotational motion of one rotational axis is transmitted to a rotational motion of the other rotational axis. The universal joint 40 may be a rod member called various types of shaft universal joints or a connection rod 41 (see
Examples of the shaft universal joint (universal joint) may include a peg-top shaft universal joint, and a constant-velocity shaft universal joint, for example.
The connection joint portion 12 is configured by the first joint piece 12a, the second joint piece 12c and the third joint piece 12e, which configure the connection pieces 30, and the universal joint 40 (the first universal joint 12b and the second universal joint 12d) which connects these connection pieces adjacent to each other. Further, the connection joint portion 12 has been described to be configured by three joint pieces, but is not limited thereto. The connection joint portion 12 may include four or more joint pieces. The connection joint portion 12 includes at least two universal joints 40. For example, the connection joint portion 12 including four joint pieces is provided with two or three universal joints 40. The first joint piece 12a is rotatably attached to the pin 12f to straddle a side surface of the crank shaft portion 6. The pin 12f is provided orthogonally with respect to the rotational axis of the crank shaft portion 6 and serves as the rotational axis of the first joint piece 12a. The first joint piece 12a is attached to the crank shaft portion 6 to swing around the pin 12f as the rotational axis.
The connection joint portion 12 has two universal joints 40. Further, since the first joint piece 12a and the crank shaft portion 6 are swingably connected to each other, the rotation and axial movement of the crank shaft portion 6 may be converted to the vertical displacement of the slide shaft portion 13.
The first universal joint 12b connects the first joint piece 12a and the second joint piece 12c using two rotational axes intersecting the first joint piece 12a and the second joint piece 12c at right angles. The first joint piece 12a and the second joint piece 12c may be bent at predetermined angles in two directions orthogonal to the first universal joint 12b as a starting point.
The second universal joint 12d connects the second joint piece 12c and the third joint piece 12e using two rotational axes intersecting the second joint piece 12c and the third joint piece 12e at right angles. The second joint piece 12c and the third joint piece 12e may be bent at predetermined angles in two directions orthogonal to the second universal joint 12d as a starting point.
The first joint piece 12a is permitted to rotate around the fourth central axis 12k (the pin 12f) orthogonal to the axial direction of the crank shaft portion 6 at one end of the first joint piece 12a, and is connected to the crank shaft portion 6. Thus, the first joint piece 12a rotates along the axial direction of the crank shaft portion 6. Further, the first joint piece 12a is connected to the second joint piece 12c via the first universal joint 12b at the other end of the first joint piece 12a. Thus, the first joint piece 12a may be bent in two directions orthogonal to the second joint piece 12c.
The second joint piece 12c is connected to the third joint piece 12e via the second universal joint 12d at one end opposite to the other end connected to the first joint piece 12a. Thus, the second joint piece 12c may be bent in two directions orthogonal to the third joint piece 12e.
The third joint piece 12e is connected to the first end portion 13b of the slide shaft portion 13 at one end opposite to the other end connected to the second joint piece 12c.
The main driving shaft portion 4 is connected to the gripping portion 11 the user grips at a lower end thereof. The gripping portion 11 is an input portion to which the user inputs a force. Further, motions of the hand and/or arm of the user are transmitted to the main driving shaft portion 4 via the gripping portion 11 so that the main driving shaft portion 4 itself rotates and moves horizontally. As will be appreciated from the first training machine 100 to be described later, the gripping portion 11 connected to the main driving shaft portion 4 may have a circular shape, in particular, a rectangular annular shape because the gripping portion 11 is gripped by the fingers of the user. As illustrated in
The intermediate shaft portion 5 is rotated in conjunction with the main driving shaft portion 4. A first rotation transmission unit 1K is spanned between the main driving shaft portion 4 and the intermediate shaft portion 5 to transmit the rotations of the main driving shaft portion 4 and the intermediate shaft portion 5 to each other. The rotation of the main driving shaft portion 4 is transmitted to the intermediate shaft portion 5 by the first rotation transmission unit 1K. Further, the force to rotate the intermediate shaft portion 5, which is caused by an external force acting on the slide shaft portion 13, is transmitted to the main driving shaft portion 4 by the first rotation transmission unit 1K. The main driving shaft portion 4 and the intermediate shaft portion 5 are arranged in parallel to each other.
The main driving shaft portion 4 and the intermediate shaft portion 5 are pivotably supported relative to the inner housing 3. The main driving shaft portion 4 and the intermediate shaft portion 5 are connected to each other and are fixed to each other by the inner housing 3. Thus, horizontal movements of the main driving shaft portion 4 and the intermediate shaft portion 5 are transmitted to each other by the inner housing 3.
In the load transmission mechanism unit for training machine 1A, the first rotation transmission unit 1K includes a transmission chain 10 (indicated by a thick dashed line in
As illustrated in
In the first example, the second rotation transmission unit 1M includes an intermediate-shaft bevel gear 5d provided in the intermediate shaft portion 5, and a crank-shaft-portion bevel gear 6c provided in the crank shaft portion 6 to be engaged with the intermediate-shaft bevel gear 5d. The intermediate shaft portion 5 rotates in conjunction with the crank shaft portion 6 at a right angle. Further, an example of a mechanism of the second rotation transmission unit 1M which connects the intermediate shaft portion 5 and the crank shaft portion 6 at the right angle with respect to each other may include a mechanism such as a combination of a crown gear and a spur gear, a combination of a worm and a worm wheel, for example.
The slide shaft portion 13 is disposed at a position parallel to the intermediate shaft portion 5 in the outer housing 2. The rotation and axial horizontal movement of the crank shaft portion 6 is converted into a vertical operation in the paper via the connection joint portion 12 so that the converted vertical operation is transmitted to the slide shaft portion 13. The slide shaft portion 13 is connected to a load applying unit 130 configured to be capable of adjusting a magnitude of a load of the first training machine 100 (see
The connection joint portion 12 operates with the rotation and axial horizontal movement of the crank shaft portion 6 so that the slide shaft portion 13 operates vertically via the connection joint portion 12. That is, the slide shaft portion 13 operates vertically with the axial rotation of the main driving shaft portion 4 and the axial horizontal movement of the crank shaft portion 6, and the load applying unit 130 (weights 131) of the first training machine 100 (see
In the load transmission mechanism unit for training machine 1A, the slide shaft portion 13 moves backward with the rotation and axial horizontal movement of the crank shaft portion by the connection joint portion 12. Thus, the main driving shaft portion 4 (the gripping portion 11) is biased by a force proportional to the load of the load applying unit 130 (see
An operation of the load transmission mechanism unit for training machine 1A will be described with reference to
The initial posture in the operation of the load transmission mechanism unit 1A illustrated in
The load transmission mechanism unit 1A illustrated in
The load transmission mechanism unit 1A illustrated in
The load transmission mechanism unit 1A illustrated in
As compared with the operation of rotating the gripping portion 11 or moving horizontally the gripping portion 11, the operation of moving horizontally the gripping portion 11 while rotating the gripping portion 11 increases a degree of bending of the connection joint portion 12 and causes the slide shaft portion 13 to be further drawn to the interior of the load transmission mechanism unit 1A. This operation consumes more energy.
Further, in the states of the load transmission mechanism unit 1A illustrated in
A configuration of the first training machine 100 is illustrated in
As illustrated in
The seating portion 110 includes a seat 111 configured such that the user who uses the first training machine 100 sits facing forward, and a seat supporting strut 112 provided vertically on a lower surface of the seat 111.
The framework 120 is provided to stably install the first training machine 100 on the floor and configures a skeleton of the entire first training machine 100. The seating portion 110, the load applying unit 130, and the two guide struts 140, for example, are fixed to the frameworks 120. The seat supporting strut 112 is inserted into a hole penetrated vertically at a front side rather than the center of a lower surface of the framework 120, so that the seating portion 110 is supported by the framework 120. The framework 120 includes a thigh pressing unit 121 configured to prevent thighs of the user seated on the seat 111 from floating upward. Preferably, the thigh pressing unit 121 may be provided such that the user makes a suitable arch in his/her back during training.
The load applying unit 130 is configured to adjust the magnitude of the load provided to the framework 120, and includes the weights 131 such as a plural sheet of plate-like plates, which are metal-made weighting members, weight guide struts 132 configured to support the weights 131 to the framework 120 to be movable vertically, and a clamp (not illustrated) configured to be capable of connecting the weights 131 to each other and separating the weights 131 from each other. The number of weights 131 may be changed to adjust the load of the load applying unit 130. A pair of the weight guide struts 132 having a cylindrical shape is fixed to the framework 120 at the rear side of the seating portion 110 in a state in which lower and upper ends of the weight guide struts 132 are arranged at predetermined intervals in a transverse direction, respectively. The weight guide struts 132 are inserted into through-holes formed in the plate-like plates as the weights 131 so that the plates are stacked by the weight guide struts 132 and are supported by the framework 120 to be movable vertically.
The two load transmission mechanism units 1A are respectively fitted to the two guide struts 140 by the connection portion 7 to be movable vertically and rotatable in the horizontal direction. The gripping portion 11, which is connected to the main driving shaft portion 4 of the load transmission mechanism unit 1A, is an annular handle functioning as the input portion the user grips with his/her both hands to input the force. Each gripping portion 11 may be rotated axially horizontally relative to the load transmission mechanism unit 1A. Further, each gripping portion 11 is swingable. In the initial state (see
The first training machine 100 illustrated in
Each tensile member 180 of the first training machine 100 illustrated in
In contrast, each tensile member 180 of the first training machine 100 illustrated in
In the case of the initial states illustrated in
Further, as illustrated in
The load transmission mechanism unit for training machine 1B according to the second example to be described later (hereinafter referred to as the “load transmission mechanism unit 1B”), the load transmission mechanism unit for training machine 1D according to the fourth example (hereinafter referred to as the “load transmission mechanism unit 1D”), and the load transmission mechanism unit for training machine 1E according to the fifth example (hereinafter referred to as the “load transmission mechanism unit 1E”) may be mounted to the first training machine 100, instead of the load transmission mechanism unit 1A. Like the load transmission mechanism units 1A, two load transmission mechanism units 1B, two load transmission mechanism units 1D, and two load transmission mechanism units 1E are respectively fitted to the two guide struts 140 by the connection portion 7 to be movable vertically and rotatable in the horizontal direction.
Representative methods of using the first training machine 100 will be sequentially described later. First, the weights 131 having a suitable weight corresponding to a load in consideration of muscles of the user, and purposes of the user, for example, are disposed. The user sits on the seat 111 facing forward, adjusts the seat 111 to an appropriate height and holds the same in place so that bottoms of his/her feet are grounded on the floor. Subsequently, the user adjusts a height of the thigh pressing unit 121 to the extent that an upper surface of the thigh of the user sat on the seat 111 is brought into contact with the thigh pressing unit 121 and holds the same in place.
Subsequently, the user stands up and grips the gripping portions 11 with his/her both hands in a state in which the backs of the hands are respectively oriented to the left and right sides of the first training machine 100 in conformity to the initial state (see
Subsequently, the user rotates his/her upper arms outward against the rotational biasing force exerted on the gripping portions 11 by the force proportional to the load of the load applying unit 130, and rotates the gripping portions 11 axially horizontally relative to the load transmission mechanism unit 1A so that the backs of his/her bands gripping the gripping portions 11 are oriented to the front side of the first training machine 100. By taking such a “dodging” position, flexor and extensor muscles of the user are “relaxed” and his/her shoulders and arms are relaxed. In addition, the gripping portions 11 are biased upward due to the load of the load applying unit 130. This moderately “extends” muscles near the shoulder girdle, for example.
Subsequently, the user pulls down the gripping portions 11 by flexing his/her both arms and “contracting” the muscles near the shoulder girdle, for example, which have been moderately “extended”, against the load of the load applying unit 130 such that “reflex” occurs in the muscles. At this time, the user pulls down the gripping portions 11 with his/her both hands while further taking the “relaxation” and “extension” actions of turning his/her upper arms outward. The action of turning the upper arms outward further axially rotates the gripping portions 11 outward horizontally relative to the load transmission mechanism unit 1A so that the weights 131 are pulled up and the load in the initial action of pulling down the arms of the user is reduced. As described above, when the muscles are “contracted” by flexing the arms of the user and pulling down the gripping portions 11, the upper arms are further turned outward. This makes it possible to obtain an appropriate “contraction” timing while taking the “relaxation” and “extension” actions. Thus, each muscle group may be operated with enhanced interoperability at a timing of “relaxation-extension-contraction” thus obtained.
Further, the user may receive the load, which is appropriately regulated by the load applying unit 130, in each of three directions (downward direction, rotational direction and lateral direction) of pulling his/her both arms down, further turning his/her upper arms outward and further extending them outward. Thus, each muscle group which is moderately “extended and contracted” may be operated with enhanced interoperability at the “relaxation-extension-contraction” timing. When the upper arms are extended outward, the load appropriately adjusted by the load applying unit 130 (the weights 131) is biased with respect to the horizontal movement of the gripping portions 11 (the main driving shaft portions 4).
When the user flexes his/her both arms to pull down the gripping portions 11, he/she gradually spreads his/her both arms outward to orient each load transmission mechanism unit 1A outward against the rotational biasing force tending to orient each load transmission mechanism unit 1A forward. The rotational biasing force tending to orient each load transmission mechanism unit 1A forward is roughly inversely proportional to the position (height) of the load transmission mechanism unit 1A. Thus, when both arms are flexed to pull the gripping portions 11 down, an antagonistic force against a force of extending both arms outward decreases. Therefore, when flexing both arms to pull the gripping portions 11 down, the user may smoothly perform a motion of gradually extending his/her both arms outward while pulling the gripping portions 11 down by using a substantially constant muscle strength to extend his/her both arms outward. This makes it possible to prevent co-contraction between an agonist muscle and an antagonist muscle.
Subsequently, after pulling the gripping portions 11 down to substantially the height of his/her shoulder, the user slowly returns the backs of his/her hands to those in the seated state along with the gripping portions 11 by turning his/her upper arms inward, closing his/her both arms inward, extending the same outward while following the biasing force caused by the load of the load applying unit 130. In this way, one cycle of training ends. Such a training is repeated in an appropriate number of cycles.
Next, the load transmission mechanism unit for training machine 1B according to the second example (hereinafter referred to as the “load transmission mechanism unit 1B”) will be described with reference to
The load transmission mechanism unit 1B differs from the load transmission mechanism unit 1A of the first example in terms of a configuration of a housing portion 22 (see
The end portion of the main driving shaft portion 4 is connected to the gripping portion 11 the user grips, which is the input portion to which the user inputs a force, or the footrest portion 271 the user steps on. The main driving shaft portion 4 rotates together with the gripping portion 11 or the footrest portion 271.
The first rotation transmission unit 1K includes an intermediate shaft portion 5 configured to rotate in conjunction with the rotation of the main driving shaft portion 4, and is suspended between the main driving shaft portion 4 and the intermediate shaft portion 5 to transmit the rotation of the main driving shaft portion 4 and the rotation of the intermediate shaft portion 5 to each other.
The second rotation transmission unit 1M is provided between the intermediate shaft portion 5 and the crank shaft portion 6 disposed orthogonally with respect to the intermediate shaft portion 5, and transmits the rotation of the intermediate shaft portion 5 and the rotation of the crank shaft portion 6 to each other.
The connection fixing portion 23 connects the main driving shaft portion 4, the intermediate shaft portion 5 and the crank shaft portion 6, and transmits horizontal movements of the main driving shaft portion 4, the intermediate shaft portion 5 and the crank shaft portion 6 to each other.
The slide shaft portion 13 may be configured to be displaced in a direction orthogonal to the axial direction of the crank shaft portion 6, and is biased linearly by an external force.
The connection joint portion 12 is configured such that the rotation centered on the first central axis 12g orthogonal to the axial direction of the slide shaft portion 13 and the rotation centered on the second central axis 12h orthogonal to the first central axis 12g are permitted by the combination of the plurality of connection pieces 30. One of the plurality of connection pieces 30 is connected to the slide shaft portion 13.
The connection joint portion 12 is configured such that a rotation centered on a central axis orthogonal to the axial direction of the crank shaft portion 6 is permitted, and connected to the crank shaft portion 6 via another connection piece different from the one connection piece connected to the slide shaft portion 13 among the plurality of connection pieces 30. Thus, the rotation and axial movement of the crank shaft portion 6 is converted into the vertical displacement of the slide shaft portion 13. When the user moves the main driving shaft portion 4 horizontally with the gripping portions 11 or the footrest portion 271, the external force applied to the slide shaft portion 13 is transmitted to the gripping portions 11 or the footrest portion 271 via the main driving shaft portion 4.
The main driving shaft portion 4, the intermediate shaft portion 5, the crank shaft portion 6 and the slide shaft portion 13 of the load transmission mechanism unit 1B are rotatably accommodated in the housing portion 22. The main driving shaft portion 4, the intermediate shaft portion 5 and the crank shaft portion 6 are connected to each other via the connection fixing portion 23, and integrally move horizontally in the axial direction of the crank shaft portion 6. The connection fixing portion 23 includes a first fixing piece 23a and a second fixing piece 23b. The first fixing piece 23a and the second fixing piece 23b have plate shapes with flat surfaces. The first fixing piece 23a and the second fixing piece 23b are connected orthogonally to each other (see
The first fixing piece 23a includes a main-driving-shaft bearing 23c and an intermediate-shaft bearing 23d provided on a surface thereof. The main driving shaft portion 4 is rotatably supported by the main-driving-shaft bearing 23c, and the intermediate shaft portion 5 is rotatably supported by the intermediate-shaft bearing 23d. A surface of the first fixing piece 23a has a flat plate shape. Thus, the main-driving-shaft bearing 23C and the intermediate-shaft bearing 23d are held perpendicular to the surface of the first fixing piece 23a, and the main driving shaft portion 4 and the intermediate shaft portion 5 are held parallel to each other. The second fixing piece 23b includes a crank-shaft bearing 23e. The crank shaft portion 6 is rotatably supported by the crank-shaft bearing 23e. A surface of the second fixing piece 23b has a flat plate shape. Thus, the crank shaft portion 6 is held perpendicular to the surface of the second fixing piece 23b. The first fixing piece 23a and the second fixing piece 23b are connected to be perpendicular to each other. Thus, the crank shaft portion 6 is installed orthogonally to the main driving shaft portion 4 and the intermediate shaft portion 5. The housing portion 22 includes a slide bearing 13a. The slide shaft portion 13 may be displaced in the vertical direction by the slide bearing 13a. The vertical direction used herein is parallel to the axial directions of the main driving shaft portion 4 and the intermediate shaft portion 5 and is perpendicular to the axial direction of the crank shaft portion 6.
A linear-movement guide unit 20 (to be described later) is provided inside the housing portion 22. The linear-movement guide unit 20 guides a slider 20c to move linearly in a direction parallel to the axial direction of the crank shaft portion 6 in the interior of the housing portion 22.
The first fixing piece 23a is fixed to the linear-movement guide unit 20 in the interior of the housing portion 22. The linear-movement guide unit 20 includes a first guide 20a, a second guide 20b, the slider 20c and a guide support stand 20d. The first guide 20a and the second guide 20b are fixed to the guide support stand 20d so that they are parallel to each other in longitudinal directions thereof in conformity to the axial direction of the crank shaft portion 6. The guide support stand 20d is fixed to the interior of the housing portion 22. The slider 20c is provided to straddle the first guide 20a and the second guide 20b, and is slidably guided by the first guide 20a and the second guide 20b.
When the user moves the gripping portions 11 horizontally in the axial direction of the crank shaft portion 6, the horizontal movement of the gripping portions 11 is changed into the horizontal movement of the main driving shaft portion 4, and the horizontal movement of the main driving shaft portion 4 is transmitted to the intermediate shaft portion 5 and the crank shaft portion 6 via the connection fixing portion 23.
Unlike the load transmission mechanism unit 1A of the first example, the load transmission mechanism unit 1B of the second example does not include the inner housing 3. This simplifies a structure of the housing of the load transmission mechanism unit 1B, which makes it possible to reduce the overall weight of the load transmission mechanism unit 1B.
Next, First Modification 1Ba and Second Modification 1Bb of the load transmission mechanism unit 1B according to the second example will be described with reference to
First Modification 1Ba of the load transmission mechanism unit 1B will be described with reference to
The connection joint portion 12 is configured such that the rotation centered on the first central axis 12g orthogonal to the axial direction of the slide shaft portion 13 and the rotation in a direction orthogonal to the first central axis 12g are permitted by the combination of the plurality of connection pieces 30. One connection piece 30 (12e) of the plurality of connection pieces 30 is connected to the slide shaft portion 13.
The first joint piece 12a and the ball joint 42 are connected to each other by the first universal joint 12b, which is a universal joint 40 (41). The ball joint 42 and the third joint piece 12e are connected to each other by the second universal joint 12d, which is a universal joint 40 (41). Connection rods 41 (see
A ball joint is composed of a ball stud formed by attaching a ring stick to a metallic ball, and a socket in spherical contact with the ball stud. The ball joint may rotate in a certain direction and has high rigidity in a translational direction. Examples of the ball stud may include a link ball, and a tri-ball join, for example.
As illustrated in
In the connection joint portion 12 according to First Modification 1Ba, the ball joint 42 is used as one of the connection pieces 30. Thus, the connection joint portion 12 may be bent smoothly, which makes it possible to smoothly transmit the rotation and horizontal movement of the main driving shaft portion 4 to the slide shaft portion 13.
The connection joint portion 12 of First Modification 1Ba may be used as the connection joint portion 12 of each of the load transmission mechanism unit 1A according to the first example, the load transmission mechanism unit 1C according to the third example, the load transmission mechanism unit 1D according to the fourth example, and the load transmission mechanism unit 1E according to the fifth example.
In this case, the load transmission mechanism units 1A, 1C, 1D and 1E may provide the same effects as those in First Modification 1Ba. By using the ball joint 42 as one of the connection pieces 30, the connection joint portion 12 may be bent smoothly, which makes it possible to more smoothly transmit the rotation and horizontal movement of the main driving shaft portion 4 to the slide shaft portions 13, 14 and 15.
Next, Second Modification 1Bb of the load transmission mechanism unit 1B will be described with reference to
The crank shaft portion 9 of Second Modification 1Bb and the crank shaft portion 6 of the load transmission mechanism unit 1B are different from each other in terms of a connection position of the connection joint portion. A distance between a base end portion of the crank shaft portion 9 of Second Modification 1Bb and the connection position of the connection joint portion 12 is greater than that between a base end portion of the crank shaft portion 6 of the load transmission mechanism unit 1B and the connection position of the connection joint portion 12 (see
Further, Second Modification 1Bb and the load transmission mechanism unit 1B are different from each other in terms of the direction of horizontal movement in which the load is applied to the main driving shaft portion 4. In the load transmission mechanism unit 1B, when the main driving shaft portion 4 (the gripping portion 11) moves in a direction away from the slide shaft portion 13 (the left direction in
On the other hand, in Second Modification 1Bb, when the main driving shaft portion 4 (the gripping portion 11) moves in a direction closer to the slide shaft portion 13 (the right direction in
In Second Modification 1Bb and the load transmission mechanism unit 1B, the load application directions associated with the same operation are diametrically opposed. Thus, by employing both Second Modification 1Bb and the load transmission mechanism unit 1B, a wide variety of muscular strength trainings may be implemented.
A configuration and operation of the load transmission mechanism unit for training machine 1C according to the third example (hereinafter simply referred to as the “load transmission mechanism unit 1C”) will be described with reference to
In the load transmission mechanism unit 1C, the main driving shaft portion 276 is connected to the footrest portion 271, which is the input portion to which the user inputs a force. The load transmission mechanism unit 1C and the load transmission mechanism unit 1A of the first example are different from each other in terms of configurations of the main driving shaft portion 4 (see
The load transmission mechanism unit 1C is used in a state in which the axial direction of the crank shaft portion 6 is oriented substantially vertically by rotating the load transmission mechanism unit 1A according to the first example (see
The user places one of his/her feet on the footrest portion 271. The footrest portion 271 has an area slightly larger than a size of the foot of the user. The footrest portion 271 includes a third rotary shaft 273, a side plate 274a, a side plate 274b and a connection plate 275.
The main driving shaft portion 276 is connected perpendicularly with respect to the central portion of the connection plate 275. The side plates 274a and 274b, which have flat-plate shapes, are provided on both ends of the connection plate 275 to be connected perpendicular to the connection plate 275. The third rotary shaft 273 is rotatably connected perpendicular to the side plates 274a and 274b.
The third rotary shaft 273 is rotatably supported by a bearing 272 (see
That is, the footrest portion 271 may be rotated around two different shafts which are orthogonal to each other. Therefore, when the footrest portion 271 has structures illustrated in
The user may perform various leg exercises using the load transmission mechanism unit 1C. Hereinafter, an operation of the load transmission mechanism unit 1C will be described, by way of an example of the leg exercises, with reference to
The user takes an initial posture in which his/her knee joint is flexed and the top of his/her foot is placed on the footrest portion 271 while being oriented upward (see
Subsequently, the user rotates his/her leg by turning his/her knee joint inward while gradually extending the knee joint (see
In the load transmission mechanism unit 1C, when the footrest portion 271 is rotated, the rotation of the main driving shaft portion 276 is transmitted to the slide shaft portion 13 via the first rotation transmission unit 1K, the second rotation transmission unit 1M and the connection joint portion 12, the slide shaft portion 13 is displaced relative to the outer housing 2. The displacement causes the weights of the load applying unit 230 to be displaced vertically. The user may perform the exercise of rotating the footrest portion 271 while resisting the force generated by the load applying unit 230.
Further, in the load transmission mechanism unit 1C, when the footrest portion 271 is translated upward from the state illustrated in
In the state of the load transmission mechanism unit 1C illustrated in
A configuration and operation of the second training machine 201 will be described with reference to
As illustrated in
The lifting portion 250 may be applied to the load transmission mechanism unit 1A, the load transmission mechanism unit 1B, and the load transmission mechanism unit 1D and the load transmission mechanism unit 1E which will be described below. The gripping portion 260 corresponds to the gripping portion 11 of the load transmission mechanism unit 1A, the load transmission mechanism unit 1B, the load transmission mechanism unit 1D and the load transmission mechanism unit 1E which will be described below. The gripping portion 260 is the input portion to which the user inputs a force.
Hereinafter, the second training machine 201 will be described in detail with reference to the figures. First, the structure of the second training machine 201 will be described with reference to
As illustrated in
As illustrated in
The framework 220 includes the cylindrical guide strut 240 extending in the vertical direction. As illustrated in
As illustrated in
The lifting portion 250 illustrated in
As illustrated in
As illustrated in
A method of using the second training machine 201 will be described with reference to
As illustrated in
From this state, the user stretches his/her left leg to push the load transmission mechanism unit 1C. Subsequently, as illustrated in
Subsequently, from the state in which the user stretches his/her leg as illustrated in
Further, as illustrated in
Although not illustrated, the user sits on the left side of the seat 211 in
In this way, the user may perform the exercise of turning his/her waist while training his/her feet. Specifically, the user stretches his/her leg to kick and push the load transmission mechanism unit 1C. Such an exercise is effective in strengthening hip joint muscles, pelvic muscles, thigh muscles and knee muscles.
A group of leg muscles may be trained at the “relaxation-extension-contraction” timing with enhanced interoperability. Specifically, in the state illustrated in
From this state, the user applies force to his/her left foot to push the load transmission mechanism unit 1C to which the load of the load applying unit 230 is applied. That is, in the course illustrated in
Further, in the course of changing from the state illustrated in
Accordingly, by repeating a cycle including operating the load transmission mechanism unit 1C from the state illustrated in
In addition, when a structure for training one leg rather than both legs is employed, there is no need to provide the load transmission mechanism unit 1C for training both legs at once. This configuration may make the second training machine 201 more compact in size than a case in which the second training machine 201 is configured to correspond to both legs (in width than a case in which two load transmission mechanism units 1C are provided for both legs). This makes it possible to reduce an area of the space where the second training machine 201 is installed. Further, in the exercise illustrated in
The first training machine 100 and the second training machine 201 described above are machines for properly training shoulder muscles, arm muscles, back muscles, and leg muscles, for example, through an initial load training (registered trademark). The initial load training is defined as a “training that uses a change in body at a position in which reflex occurs, a change in position of the center of gravity accompanied by such a body change, for example, to promote a sequence of actions such as relaxation-extension-contraction associated with the agonist muscle, while preventing co-contraction of its antagonist muscle and muscles acting in an antagonistic manner.” The initial load training is completely different from a final load training that applies a load until the end to bulk up the muscles while holding the tension state (hardened state) of the muscles. The initial load training requires consideration of the overall motion image, including a point at which the load is applied, a point and angle at which the load is released, a rhythm, a continuity of muscle output, for example. In a load training in the related art, it may be difficult to take an appropriate motion and form due to a balance, and partial hardening of the body, for example. However, by using the first training machine 100 and the second training machine 201 which implement the initial load training, the user may easily perform a training with a sequence of more ideal movements and forms.
By the initial load training using the first training machine 100 and the second training machine 201, a situation of “transmission of force between segments from the central portion (core portion of the body) to the terminal portion” may be obtained. That is, an activity status in which other muscles of the human body do not undergo the co-contraction like cardiac muscles that do not undergo the co-contraction, may be obtained by making muscles of the human body having the property of contracting without trying to extend themselves in the relaxation state, applying an appropriate load to muscle spindles and tendons as sensory receptors to induce a force from a time point which the muscles are moderately or passively extended to a time point at which the muscles are contracted, and instantaneously reducing the load or gradually reducing the load in a continuous manner. This makes it possible to promote and develop the neuromuscular control.
The initial load training using the first training machine 100 and the second training machine 201 is a training which uses the load of the training machines to cause a reflex in the muscles, cause the muscles that should be working to work well, thereby enhancing functions of the muscles and nerves. The load may be used as a catalyst to promote the extension and contraction of the relaxed muscles at a proper timing. The initial load training promotes a sequence of relaxation-extension-contraction actions and further prevent the co-contraction. The initial load training enhances the functions of the nerves and muscles and the cooperativeness, reduces strain on the body, such as muscle pain, and fatigue without any muscle hardening, thereby obtaining flexible and elastic muscles. Further, the initial load training promotes metabolism aerobically with little forced increase in heart rate and blood pressure, which is effective in preventing lifestyle-related diseases such as diabetes and high blood pressure, and in treating ligament injuries, and fractures, for example. Further, the initial load training releases stress on the nerves, the muscles and the joints, and removes waste products, thereby making the body in a beneficial state.
Next, Modification 1Ca of the load transmission mechanism unit 1C according to the third example used for the second training machine 201 will be described below with reference to
In
Modification 1Ca of the load transmission mechanism unit 1C will be described with reference to
In the load transmission mechanism unit 1C (see
Meanwhile, the movement direction of the footrest portion 271 (the main driving shaft portion 4) of Modification 1Ca (see
In Modification 1Ca (see
Further, in the load transmission mechanism unit 1C, when the footrest portion 271 (the main driving shaft portion 4) is moved directly upward, it may be difficult to get force to his/her leg. However, in Modification 1Ca, the footrest portion 271 (the main driving shaft portion 4) is moved diagonally upward, which makes it easier to get the force to his/her leg and facilitate the muscle strength training.
A configuration and operation of the load transmission mechanism unit for training machine 1D of the fourth example (hereinafter simply referred to as the “load transmission mechanism unit 1D) will be described with reference to
The load transmission mechanism unit 1D is connected to and used in the first training machine 100 and the second training machine 201.
The configuration of the slide bearing 14a of the load transmission mechanism unit 1D differs from the slide bearing 13a of the load transmission mechanism unit 1B of the second example. Thus, the operation of the slide shaft portion 14 of the load transmission mechanism unit 1D differs from that of the slide shaft portion 13 of the load transmission mechanism unit 1B. In the following description of the load transmission mechanism unit 1D with reference to
The slide shaft portion 14 of the load transmission mechanism unit 1D corresponds to the slide shaft portion 13 of the load transmission mechanism unit 1B, and has the same shape as the slide shaft portion 13. However, the slide shaft portion 14 is different in operation from the slide shaft portion 13.
The slide bearing 14a configured to support the slide shaft portion 14 has a bearing hole 14d through which the slide shaft portion 14 passes obliquely with respect to the axial direction of the crank shaft portion 6 (see
The slide shaft portion 14 passing through the slide bearing 14a is drawn into or projected into the housing portion 22 at an angle with respect to the axial direction of the crank shaft portion 6.
Although the angle between the slide shaft portion 13 and the crank shaft portion 6 in the load transmission mechanism unit 1B according to the second example is the right angle, an angle between the central axis of the slide shaft portion 14 and the central axis of the crank shaft portion 6 in the load transmission mechanism unit 1D is an obtuse angle greater than the right angle. Thus, an amount of deformation of the connection joint portion 12 connecting the slide shaft portion 13 and the crank shaft portion 6, which is caused by the rotation or horizontal movement of the crank shaft portion 6, is larger than that of the connection joint portion 12 of the load transmission mechanism unit 1D. Therefore, when the slide bearing 14a is employed instead of the slide bearing 13a, friction and other resistance associated with the deformation of the connection joint portion 12 of the load transmission mechanism unit 1D becomes smaller. This makes it possible to more smoothly perform the operation of the load transmission mechanism unit 1D, and further reduce the deformation of the connection joint portion 12. This suppresses wear and tear on the connection joint portion 12.
The slide bearing 14a of the load transmission mechanism unit 1D according to the fourth example may be applied to the load transmission mechanism unit 1A according to the first example. In the case in which the slide bearing 14a is applied to the load transmission mechanism unit 1A, the slide bearing 14a is mounted on the load transmission mechanism unit 1A instead of the slide bearing 13a. The slide shaft portion 13 of the load transmission mechanism unit 1A corresponds to the slide shaft portion 14 of the load transmission mechanism unit 1D and has the same shape as the slide shaft portion 14. When the slide shaft portion 13 of the load transmission mechanism unit 1A is pivotably supported relative to the slide bearing 14a, the slide shaft portion 13 operates in the same way as the slide shaft portion 14.
Therefore, when the slide bearing 14a is mounted instead of the slide bearing 13a, the friction and other resistance associated with the deformation of the connection joint portion 12 of the load transmission mechanism unit 1A may be reduced. Thus, the operation of the load transmission mechanism unit 1A may be performed more smoothly, and the amount of deformation of the connection joint portion 12 may also be reduced. This makes it possible to suppress the wear and tear on the connection joint portion 12.
Further, the slide bearing 14a of the load transmission mechanism unit 1D according to the fourth example may be applied to the load transmission mechanism unit 1C according to the third example. In the case in which the slide bearing 14a is applied to the load transmission mechanism unit 1C, the slide bearing 14a is mounted on the load transmission mechanism unit 1C instead of the slide bearing 13a. The slide shaft portion 13 of the load transmission mechanism unit 1C corresponds to the slide shaft portion 14 of the load transmission mechanism unit 1D and has the same shape as the slide shaft portion 14. When the slide shaft portion 13 of the load transmission mechanism unit 1C is pivotably supported relative to the slide bearing 14a, the slide shaft portion 13 operates in the same way as the slide shaft portion 14.
Therefore, when the slide bearing 14a is mounted instead of the slide bearing 13a, the friction and other resistance associated with the deformation of the connection joint portion 12 of the load transmission mechanism unit 1C may be reduced. Thus, the operation of the load transmission mechanism unit 1C may be performed more smoothly and the amount of deformation of the connection joint portion 12 may also be reduced. This makes it possible to suppress the wear and tear on the connection joint portion 12.
A configuration and operation of the load transmission mechanism unit for training machine 1E according to the fifth example (hereinafter simply referred to as the “load transmission mechanism unit 1E”) will be described with reference to
The load transmission mechanism unit 1E is connected to and used in the first training machine 100 and the second training machine 201.
The configuration of the slide bearing 15a of the load transmission mechanism unit 1E differs from the slide bearing 13a of the load transmission mechanism unit 1B of the second example. Thus, the operation of the slide shaft portion 15 of the load transmission mechanism unit 1E differs from that of the slide shaft portion 13 of the load transmission mechanism unit 1B. In the following description of the load transmission mechanism unit 1E with reference to
The slide shaft portion 15 of the load transmission mechanism unit 1E corresponds to the slide shaft portion 13 of the load transmission mechanism unit 1B, and has the same shape as the slide shaft portion 13. However, the slide shaft portion 15 is different in operation from the slide shaft portion 13.
In the load transmission mechanism unit for training machine 1E (hereinafter simply referred to as the “load transmission mechanism unit 1E”), the slide bearing 15a configured to pivotably support the slide shaft portion 15 has a first bearing hole 15j through which the slide shaft portion 15 passes orthogonally with respect to the axial direction of the crank shaft portion 6, and a second bearing hole 15k intersecting the first bearing hole 15j and through which the slide shaft portion 15 passes obliquely with respect to the axial direction of the crank shaft portion 6. The slide shaft portion 15 moves between the first bearing hole 15j and the second bearing hole 15k with the axial movement of the crank shaft portion 6.
The bearing hole 15d of the slide bearing 15a has the first bearing hole 15j and the second bearing hole 15k. As illustrated in
As illustrated in
The slide shaft portion 15 is supported by the first bearing hole 15j in a vertical state and is supported by the second bearing hole 15k in a maximum inclination state. The slide shaft portion 15 is supported by a narrow portion 15m between the vertical state and the maximum inclination state. As illustrated in
In a state in which no force by the user is input to the gripping portion 11 of the load transmission mechanism unit 1E, that is, in an initial state of the load transmission mechanism unit 1E, the slide shaft portion 15 protrudes outward of the housing portion 22 to its full length. In the initial state, the gripping portion 11 is in the vertical state and is supported by the first bearing hole 15j. In the initial state of the load transmission mechanism unit 1E, the main driving shaft portion 4 is positioned at the rightmost side in
Subsequently, when the user makes an input to move horizontally or rotate the gripping portion 11, the slide shaft portion 15 is gradually drawn into the housing portion 22 and is increased in an inclination angle. In this state, the main driving shaft portion 4 transitions from the state of being supported by the first bearing hole 15j to the state of being supported by the narrow portion 15m.
Subsequently, when the user further makes the input to move horizontally or rotate the gripping portion 11, the slide shaft portion 15 is held at a maximum inclination angle. In this state, the slide shaft portion 15 transitions from the state of being supported by the narrow portion 15m to the state of being supported by the second bearing hole 15k.
A side flat surface 151 of the slide bearing 15a is a flat surface. The side surface 151 is used in positioning the slide bearing 15a. When the side surface 151 is brought into contact with a flat surface which serves as a reference for the positioning of the slide bearing 15a, a position and angle of the slide bearing 15a is defined.
Since the load transmission mechanism unit 1E uses the slide bearing 15a to incline the slide shaft portion 15, it is possible to suppress a degree of bending of the connection joint portion 12. With this configuration, the use of the slide bearing 15a instead of the slide bearing 13a makes it possible to reduce the friction and other resistance associated with the deformation of the connection joint portion 12 of the load transmission mechanism unit 1E. This makes it possible to more smoothly perform the operation of the load transmission mechanism unit 1E and reduce the amount of deformation of the connection joint portion 12, thereby suppressing the wear and tear on the connection joint portion 12.
The slide bearing 15a of the load transmission mechanism unit 1E according to the fifth example may be applied to the load transmission mechanism unit 1A according to the first example. In the case in which the slide bearing 15a is applied to the load transmission mechanism unit 1A, the slide bearing 15a instead of the slide bearing 13a is mounted on the load transmission mechanism unit 1A. The slide shaft portion 13 of the load transmission mechanism unit 1A corresponds to the slide shaft portion 15 of the load transmission mechanism unit 1E and has the same shape as the slide shaft portion 15. When the slide shaft portion 13 of the load transmission mechanism unit 1A is pivotably supported relative to the slide bearing 15a, the slide shaft portion 13 operates in the same way as the slide shaft portion 15.
Therefore, when the slide bearing 15a is mounted instead of the slide bearing 13a, the friction and other resistance associated with the deformation of the connection joint portion 12 of the load transmission mechanism unit 1A may be reduced. Thus, the operation of the load transmission mechanism unit 1A may be performed more smoothly and the amount of deformation of the connection joint portion 12 may also be reduced. This makes it possible to suppress the wear and tear on the connection joint portion 12.
Further, the slide bearing 15a of the load transmission mechanism unit 1E according to the fifth example may be applied to the load transmission mechanism unit 1C according to the third example. In the case in which the slide bearing 15a is applied to the load transmission mechanism unit 1C, the slide bearing 15a instead of the slide bearing 13a is mounted on the load transmission mechanism unit 1C. The slide shaft portion 13 of the load transmission mechanism unit 1C corresponds to the slide shaft portion 15 of the load transmission mechanism unit 1E and has the same shape as the slide shaft portion 15. When the slide shaft portion 13 of the load transmission mechanism unit 1C is pivotably supported relative to the slide bearing 15a, the slide shaft portion 13 operates in the same way as the slide shaft portion 15.
Therefore, when the slide bearing 15a is mounted instead of the slide bearing 13a, the friction and other resistance associated with the deformation of the connection joint portion 12 of the load transmission mechanism unit 1C may be reduced. Thus, the operation of the load transmission mechanism unit 1C may be performed more smoothly and the amount of deformation of the connection joint portion 12 may also be reduced. This makes it possible to suppress the wear and tear on the connection joint portion 12.
Modification of the slide bearing 15a of the load transmission mechanism unit 1E will be described with reference to
As illustrated in
The slide bearing 16a of First Modification differs from the slide bearing 15a described above in terms of the shape of the bearing hole 15d. That is, the bearing hole 16d of the slide bearing 16a has the inverted truncated conical shape, which differs in shape from the aforementioned slide bearing 15a.
The bearing hole 16d has an inclined-conical side surface portion 16e and a minimal-diameter bearing hole 16f formed in a lower end thereof.
When the slide shaft portion 15 is in the vertical state and the inclination state, the slide shaft portion 15 is supported by the minimal-diameter bearing hole 16f. Further, when the slide shaft portion 15 is in the maximum inclination state, the slide shaft portion 15 is brought into contact with the inclined-conical side surface portion 16e and is supported by the inclined-conical side surface portion 16e and the minimal-diameter bearing hole 16f.
As illustrated in
The slide bearing 17a of Second Modification differs from the slide bearing 15a described above in terms of the shape of the bearing hole 15d. That is, the bearing hole 17d of the slide bearing 17a has an upper inclined-conical side surface portion 17e and a lower inclined-conical side surface portion 17f to form a drum-like shape, which differs in shape from the aforementioned slide bearing 15a.
The narrow portion 17g is defined at a boundary between the upper inclined-conical side surface portion 17e and the lower inclined-conical side surface portion 17f. When the slide shaft portion 15 is in the vertical state and the inclination state, the slide shaft portion 15 is supported by the narrow portion 17g. When the slide shaft portion 15 is in the maximum inclination state, the slide shaft portion 15 is brought into contact with the upper inclined-conical side surface portion 17e or the lower inclined-conical side surface portion 17f, and is supported by the narrow portion 17g and the upper inclined-conical side surface portion 17e or the lower inclined-conical side surface portion 17f.
This disclosure is not limited to the load transmission mechanism units 1A, 1B and 1C according to the above examples, and the first training machine 100 and the second training machine 201 using the same, but may be implemented by various other modifications or applications without departing the scope of this disclosure defined by the appended claims.
In some instances, a configuration of a load transmission mechanism unit for training machine may be summarized as follows:
The load transmission mechanism unit for training machine includes:
| Number | Date | Country | Kind |
|---|---|---|---|
| 2022-108017 | Jul 2022 | JP | national |
This application is a continuation application of International Application No. PCT/JP2023/022592, filed on Jun. 19, 2023, which claims priority of Japanese (JP) Patent Application No. 2022-108017, filed on Jul. 4, 2022, the contents of which are hereby incorporated by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/JP2023/022592 | Jun 2023 | WO |
| Child | 19009513 | US |
