Patent Grant
11931617
The present invention relates to a training device, and more specifically, to a training device with which free-weight training can be solely and safely performed and a barbell to be used together with the training device.
Methods of strength training utilizing equipment (excluding so-called “bodyweight training”) can be roughly divided into two types. One type is machine training using a dedicated device equipped with a weighted object, and the other type is free-weight training using, for example, a dumbbell or a barbell (hereinafter referred to as “weighted object”).
In the free-weight training, a person who performs the training (hereinafter referred to as “user”) is required to use his or her whole body to support a weight while keeping a balance. Thus, the free-weight training is said to have a higher training effect as compared to the machine training in which the weight passes a constant path and the balance is mechanically maintained.
The user can perform the free-weight training alone, but with assistance by a spotter, there are advantages in that more effective training is allowed (for example, pushing muscles to exhaustion and preventing injury), and more efficient training is allowed (showing effects in a shorter period of time).
In recent years, there has been proposed a training device configured so that training can be performed in an environment similar to the free-weight training with a spotter (Patent Literature 1).
However, the training device described in Patent Literature 1 has a configuration in which a weighted object (barbell) is supported by wires, and thus has a problem in terms of safety.
In order to solve the problem, the present invention provides a training device with which various kinds of free-weight training can be solely and safely performed and a barbell to be used together with the training device.
According to the present invention, there is provided a training device for strength training to be performed through use of a weighted object (barbell), the training device including: a frame body; a support body configured to support the barbell from below; moving means for moving the support body to ascend and descend along the frame body; control means for controlling the moving means; and state detecting means for detecting a state of the barbell or a user, wherein the control means is configured to control the moving means based on a detection signal detected by the state detecting means, wherein the support body includes: a front-and-rear direction guiding portion configured to guide the barbell having a longitudinal direction in a right-and-left direction to a predetermined position in a front-and-rear direction of the support body; and a lateral direction guiding portion configured to guide the barbell to a predetermined position in the right-and-left direction of the support body, wherein the front-and-rear direction guiding portion includes: a first downward-inclined surface having a downward inclination from one end side in a longitudinal direction of the support body being a front-and-rear direction toward a middle portion side in the longitudinal direction of the support body; a second downward-inclined surface having a downward inclination from another end side in the longitudinal direction of the support body toward the middle portion side in the longitudinal direction of the support body; and a lowest portion provided on forward sides in downward directions of both of the first downward-inclined surface and the second downward-inclined surface, and wherein the lateral direction guiding portion includes an outer downward-inclined surface having a downward inclination on an outer side in a transverse direction of the support body being the right-and-left direction. According to the present invention, there is provided a barbell to be used together with the training device, the barbell including: a long bar; a flange rotatably provided on an outer periphery of the long bar; and a weight equipping portion rotatably provided on the outer periphery of the long bar, wherein the flange includes an abutment portion to be brought into abutment against a lateral direction guiding portion formed on a support body of the training device.
According to the training device of the present invention and the barbell to be used together with the training device, the support body ascends and descends in accordance with the state detecting means for detecting the state of the barbell or the user, and hence various kinds of free-weight training can be solely and safely performed.
An example of a training device and a barbell according to the present invention is described with reference to the drawings. The training device according to the present invention is a device for strength training to be performed through use of a weighted object. In the following, as an example, description is given of a case in which the weighted object is a barbell W in which plates (weights) W2 are provided on both ends in a longitudinal direction of a shaft W1.
As an example, the training device illustrated in
The frame body 10 is a part serving as a framework of the training device. The frame body 10 in this embodiment includes two frame body bases 11a and 11b and four support columns 12 (first support column 12a to fourth support column 12d). The two frame body bases 11a and 11b are arranged in parallel to each other at an interval on left and right sides, respectively. The four support columns 12 are provided upright at an interval in a front-and-rear direction of each of the frame body bases 11a and 11b. Both the frame body bases 11a and 11b have one end sides coupled to each other by a first base coupling member 11c, and other end sides coupled to each other by a second base coupling member 11d. A step plate 11e is provided on the first base coupling member 11c.
Among the four support columns 12, the first support column 12a and the second support column 12b are coupled to each other by a first coupling member 13a, and the third support column 12c and the fourth support column 12d are coupled to each other by a second coupling member 13b. Between the first coupling member 13a and the second coupling member 13b, a third coupling member 13c is bridged on one end side, a fourth coupling member 13d is bridged on another end side, and a pull-up/chin-up bar 14 is bridged at a middle position. On an inner side of the four support columns 12a to 12d, a training space S1 in which a user performs training is formed.
An auxiliary support body 15 is provided on inner surface sides of the four support columns 12a to 12d. The auxiliary support body 15 in this embodiment includes locking plates 15a fixed to the support columns 12, respectively, and a safety bar 15b removably mounted to the locking plates 15a.
The locking plates 15a in this embodiment are each a vertically-long plate-shaped member arranged along the support column 12, and each have, on its surface, a plurality of locking holes 15c, to which the safety bar 15b is lockable, and which are formed at intervals in a height direction.
The safety bar 15b in this embodiment is a bar-shaped member having locking protrusions (not shown) provided on its back surface. The safety bar 15b is arranged in parallel to the first coupling member 13a and the second coupling member 13b. The safety bar 15b can be mounted to the locking plates 15a when the locking protrusions are locked to any locking holes 15c suitable for the training type. The auxiliary support body 15 may be provided as required, and can be omitted when not required.
The configuration of the frame body 10 is merely an example, and other configurations can also be adopted.
The support body 20 is configured to support the barbell W from below. In this embodiment, one support body 20 is provided between the first support column 12a and the second support column 12b, and another support body 20 is provided between the third support column 12c and the fourth support column 12d (two support bodies 20 in total). The two support bodies 20 are provided at opposed positions at the same height. The barbell W is horizontally supported on both end sides in the longitudinal direction thereof by those two support bodies 20.
As an example, the support body 20 illustrated in
The support body base 21 has a horizontally-long box shape, and both ends in the width direction thereof are held by sliders 32 to be described later. The support body base 21 has shock absorbers provided thereon as the dampers 22 configured to reduce the impact applied to the receiving portion 23. In this embodiment, as an example, there is shown a case in which five shock absorbers are provided, but the number of shock absorbers may be larger or smaller than five.
As illustrated in
The receiving portion 23 is provided above the five shock absorbers. The receiving portion 23 is a part configured to support the barbell W from below. The receiving portion 23 has a support surface for supporting the weighted object. The receiving portion 23 in this embodiment is formed into a V-shape having downward inclinations from both end sides in a longitudinal direction toward a middle portion. The barbell W is supported under a state in which the barbell W is movable on the support surface.
Both inclined surfaces of the receiving portion 23 (front downward-inclined surface 23a and rear downward-inclined surface 23b) function as a guiding portion (front-and-rear direction guiding portion) configured to guide the barbell W to a middle portion (lowest portion) in the front-and-rear direction (
The receiving portion 23 in this embodiment has, in addition to the front downward-inclined surface 23a and the rear downward-inclined surface 23b, an outer downward-inclined surface 23c inclined outward. The outer downward-inclined surface 23c functions as a guiding portion (lateral direction guiding portion) configured to guide the barbell W to a middle portion in a right-and-left direction.
Specifically, when a barbell 70 (see
Sensor brackets 25 are provided one by one on both end sides in the longitudinal direction of the receiving portion 23, and proximity detecting means 26 is provided on each of the sensor brackets 25. The proximity detecting means 26 is means for detecting that the weighted object is brought closer to the support body beyond a reference separation distance.
As the proximity detecting means 26, for example, various laser sensors can be used, but sensors other than the laser sensors can also be used.
In this embodiment, contact detecting means 27 (
As the contact detecting means 27, means other than the load sensor can also be used as long as the means can detect the contact to the support body 20 (receiving portion 23). For example, a physical switch configured to turn on in response to contact of the barbell W, or an eddy current sensor configured to measure a distance with respect to the barbell W through use of a high frequency magnetic field can be used. The contact detecting means 27 may be provided as required, and can be omitted when not required.
The configuration of the support body 20 is merely an example, and other configurations can also be adopted.
The moving means 30 is configured to move the support body 20 to ascend and descend along the support columns 12 of the frame body 10. In this embodiment, a linear actuator is used as the moving means 30. The linear actuator includes a guide rail 31, and the slider 32 configured to slide along the guide rail 31.
In this embodiment, one guide rail 31 is provided on a front surface side of the first support column 12a, one guide rail 31 is provided on a rear surface side of the second support column 12b, one guide rail 31 is provided on a front surface side of the third support column 12c, and one guide rail 31 is provided on a rear surface side of the fourth support column (four guide rails 31 in total).
A first slider 32a is provided on the guide rail (first guide rail 31a) on the front surface side of the first support column 12a, a second slider 32b is provided on the guide rail (second guide rail 31b) on the rear surface side of the second support column 12b, a third slider 32c is provided on the guide rail (third guide rail 31c) on the front surface side of the third support column 12c, and a fourth slider 32d is provided on the guide rail (fourth guide rail 31d) on the rear surface side of the fourth support column 12d.
One of the two support bodies 20 is bridged between the first slider 32a and the second slider 32b, and the other thereof is bridged between the third slider 32c and the fourth slider 32d. Both the support bodies 20 are each held at both ends in the longitudinal direction by the sliders 32.
In this embodiment, all of the first slider 32a, the second slider 32b, the third slider 32c, and the fourth slider 32d are caused to ascend and descend in synchronization with each other so that both the support bodies 20 ascend and descend at the same height while keeping horizontal postures. One linear actuator may be provided for one support body 20 (one linear actuator in total). In this case, only one end side in the longitudinal direction of each support body 20 is held by the slider 32 with an actuator, and the other end side thereof is held by the slider 32 without an actuator.
The linear actuator in this embodiment is controlled by the control means 50. The control of the linear actuator is to be described later. As long as the means can move the support body 20 to ascend and descend, means other than a linear actuator can be used as the moving means 30.
The state detecting means 40 is means for detecting a state of the barbell W or the user. In this embodiment, a depth camera (depth sensor) is used as the state detecting means 40. The depth camera in this embodiment is configured to detect position information of the shaft W1 of the barbell W. The depth camera in this embodiment can measure a distance from the depth camera to the barbell W (shaft W1).
As illustrated in
Although not shown, information acquired by the depth camera is transmitted to a processing unit connected to the depth camera, and is processed by the processing unit. In this embodiment, in the processing unit, a moving speed, a path, and a lateral balance of the barbell W can be calculated based on a change over time of the position information acquired by the depth camera.
Specifically, an angle of the barbell W can be calculated based on the number of pixels, and the position of the shaft W1 can be identified from the calculated angle and the distance to the shaft W1 measured by the depth camera.
In this embodiment, the information acquired by the depth camera and the information calculated by the processing unit are transmitted to the control means 50, and the moving means 30 is controlled based on the transmitted pieces of information.
As the state detecting means 40, other than the depth camera, an optical camera configured to shoot, for example, a motion of the barbell or a motion of the user, and a sound sensor configured to detect, for example, voice output from the user can also be used.
When the optical camera is used as the state detecting means 40, a position, a moving speed, a path, a lateral balance, or the like of the barbell W can be calculated through machine learning from image data (moving image) obtained by the optical camera. Also in this case, the information acquired by the optical camera and the information calculated by the processing unit can be transmitted to the control means 50, and the moving means 30 can be controlled based on those transmitted pieces of information.
When the sound sensor is used as the state detecting means 40, it can be determined that the user has reached the limit when the sound sensor detects voice of the user, and the moving means 30 can be controlled in response thereto.
The state detecting means 40 can be provided on the barbell W. For example, the barbell may be equipped with a gyroscope sensor, and the gyroscope sensor may measure an acceleration of the barbell W. The gyroscope sensor can be provided on the interior or the exterior of the barbell W. Other than the gyroscope sensor, a switch to be operated by the user may be provided on the barbell W so that the state of the user can be detected through an operation of the switch.
The configuration of the state detecting means 40 is merely an example, and other configurations can also be adopted.
The control means 50 is configured to control the moving means 30 and other various pieces of equipment. As illustrated in
Now, description is given of control that is based on the signal transmitted from the proximity detecting means 26, control that is based on the signal transmitted from the contact detecting means 27, and control that is based on the signal transmitted from the state detecting means 40. The following types of control are merely examples, and other types of control can also be performed.
First, description is given of the control that is based on the signal transmitted from the proximity detecting means 26 and the control that is based on the signal transmitted from the contact detecting means 27. As illustrated in
After the support body 20 is decelerated by the control, when the contact detecting means 27 detects that the barbell W is brought into contact with the support body 20, the moving means 30 is controlled so that the support body 20 is accelerated. With this control, the barbell W is caused to rapidly ascend, thereby being capable of preventing the user from being crushed by the barbell W.
In a simulation performed by the applicant, when the support body 20 was brought into contact with the barbell W (stationary state) of 120 kg held by the user at a moving speed of 270 mm/s, an impact force was 893 kgf, but when the moving speed of the support body 20 was decreased to 50 mm/s, the impact force was 31 kgf. From the simulation results, a great damping effect due to the deceleration of the support body 20 was recognized.
In the control, the moving means 30 can be controlled as follows. Instead of supporting the entire (100%) load to be applied to the support body 20, a difference between a weight of the barbell W set in advance and a weight detected by the contact detecting means (load sensor) 27 may be calculated, and assistance may be given by an amount corresponding to the difference.
For example, in a case in which the weight of the barbell W set in advance is 100 kg, when the weight detected by the load sensor is 30 kg, it can be determined that the user still has strength to lift up a weight of 70 kg, and the control can be performed to give assistance by an amount corresponding to the lacking weight of 30 kg.
Next, description is given of the control that is based on the signal transmitted from the state detecting means 40. In this embodiment, the moving means 30 is controlled in accordance with each of three modes of a “normal mode (Normal MODE),” a “forced-reps mode (Forced-Reps MODE),” and a “drop-sets mode (Drop-Sets MODE).”
The “normal mode (Normal MODE)” is a mode in a case in which training similar to general free-weight training to be performed without a spotter is performed. The “forced-reps mode (Forced-Reps MODE)” is a mode in a case in which training similar to forced-reps training is performed. The “drop-sets mode (Drop-Sets MODE)” is a mode in a case in which training similar to drop-sets training is performed.
In this case, the forced-reps training refers to a training method in which the spotter supports the lifting of the barbell W when the user cannot lift up the barbell W anymore, thereby being capable of increasing the number of lift-up times of the barbell W as compared to a case in which the user performs the training alone.
Further, the drop-sets training refers to a training method in which the spotter reduces the weight of the barbell little by little at the timing at which the user comes close to the limit and cannot lift up the barbell W any more, thereby being capable of increasing the number of lift-up times of the barbell W as compared to the case in which the user performs the training alone. Both of the methods are said to be one of most efficient training methods with which results can be achieved in a short period of time.
Now, description is given of the control in each of the training modes of the “normal mode (Normal MODE),” the “forced-reps mode (Forced-Reps MODE),” and the “drop-sets mode (Drop-Sets MODE).”
As illustrated in
The state detecting means 40 may detect, in addition to the above, intervention instructions of the user given by methods other than the voice or the barbell operation (for example, a switch to be stepped by a foot) or a body state of the user (for example, an abnormality in heart rate), and the moving means 30 may be controlled based on the detection results.
Further, when the state detecting means 40 detects a state in which there is a high probability of injury or accident, the moving means 30 may be controlled so that the support body 20 ascends. Specifically, the state detecting means 40, for example, the optical camera can measure a training form in real time, and when a state in which a form collapse leading to injury or an actual unbalance causing falling becomes apparent (for example, when the form of the user falls outside of a range of a reference form set in advance), the control can be performed so that the support body 20 automatically ascends to hold the barbell W. Similarly, when the state detecting means 40, for example, a vital sensor detects that vitals such as heartbeat and breathing have abnormal values (for example, the vital data of the user falls outside of a range of reference vitals set in advance), the control can be performed so that the support body 20 automatically ascends to hold the barbell W.
After that, when the barbell W ascends to reach a start position by the support body 20, the moving means 30 is controlled so that the support body 20 is stopped at this position (Start Position).
When the support body 20 ascends, sound output means 28 (
As illustrated in
When the barbell W is supported by the ascending support body 20, the moving means 30 is controlled so that the support body 20 ascends in consideration of the remaining muscular strength of the user (Power Assist).
After that, when the barbell W ascends to reach the start position by the support body 20, the support by the support body 20 is canceled.
In this mode, the control is performed until the number of repetitions set in advance is finished. Meanwhile, when the state detecting means 40 detects that a descending speed of the barbell W is faster than a speed set in advance (Descend Speed), the moving means 30 is controlled so that the support body 20 ascends to reach a position at which the support body 20 can support the barbell W. When the barbell W is supported by the support body 20, the moving means 30 is automatically stopped.
Similarly to the case of the “normal mode (Normal MODE),” also in this mode, when the support body 20 ascends, the sound output means 28 (
As illustrated in
When the barbell W is supported by the ascending support body 20, a weight of the weight W2 is automatically changed at a predetermined position (for example, a position of a predetermined support bar 63 of a plate rack 60 to be described later) (Plate Change). After that, the user restarts raising and lowering the barbell W without an interval.
As described above, the weight W2 can be automatically changed, and hence the user is not required to replace the weight W2 by himself or herself. Thus, the user can immediately start the next set without an interval (rest), thereby being capable of efficiently performing the drop-sets training. The function of automatically changing the weight W2 is not always required, and can be omitted when not required. When the function of automatically changing the weight W2 is not used, for example, the plate rack 60 illustrated in
Next, description is given of the replacement of the weight W2. The plate racks 60 illustrated in
In this embodiment, three support bars 63 are provided to protrude at intervals in a height direction of the rack support column 62. The support bars 63 of the right and left plate racks 60 are provided so that lower support bars, middle support bars, and upper support bars thereof have the same heights.
Each support bar 63 holds the weight W2. In this embodiment, the weight W2 held by the middle support bar 63b is lighter than the weight W2 held by the lower support bar 63a, and the weight W2 held by the upper support bar 63c is lighter than the weight W2 held by the middle support bar 63b.
When the user replaces the weight W2, the weight W2 mounted on the shaft W1 is slid and moved to the support bar 63 present at the same height as the shaft W1 (weight W2 in use is removed).
After that, the support body 20 is moved so that the shaft W1 is brought to the same height as a different support bar 63, and the weight W2 held by the support bar 63 is slid and moved to the shaft W1 (different weight W2 is mounted), thereby being capable of easily replacing the weight W2.
When the training device according to the present invention is used, an existing barbell W can be used, but a dedicated barbell 70 developed for the training device according to the present invention can also be used.
As an example, the barbell 70 illustrated in
As illustrated in
Both the flanges 72 each have a shape including a cylindrical portion 72b on a distal end side of the conical portion 72a. In parts of both the core members 74 on the outer sides of both the flanges 72, the cylindrical weight equipping portions 73 are rotatably provided through intermediation of second bearings 76. Both the weight equipping portions 73 are held by lock nuts 77 so that the weight equipping portions 73 are prevented from falling off from the core members 74.
In the barbell W, the shaft 71, the flanges 72, and the weight equipping portions 73 are each rotatably coupled through intermediation of bearings. Accordingly, when the conical portion of the weight equipping portion 73 is placed on the receiving portion 23 of the support body 20, the barbell W is smoothly guided to the middle portion (lowest portion) even when the barbell W is equipped with a weight.
Further, as described above, the conical portion 72a of the flange 72 in the barbell W abuts against the outer downward-inclined surface 23c of the receiving portion 23 in the support body 20. In this manner, the barbell W is guided to the middle portion in the right-and-left direction.
The barbell 70 illustrated in
Another example of the training device according to the present invention is described with reference to the drawings. The basic configuration of the training device according to this embodiment is similar to that in the case of the first embodiment. Differences reside in that, as illustrated in
The frame body 10 in this embodiment includes an additional first support column 12e provided upright on the front side of the second support column 12b, and an additional second support column 12f provided upright on the front side of the fourth support column 12d. The additional first support column 12e is provided upright on the frame body base 11a extended to the front side of the second support column 12b, and the additional second support column 12f is provided upright on the frame body base 11b extended to the front side of the fourth support column 12d.
Extended front end portions of both the frame body bases 11a and 11b are coupled to each other by an additional coupling member 11f. Upper end portions of the additional first support column 12e and the additional second support column 12f are coupled to each other by a fifth coupling member 13e.
As illustrated in
In this embodiment, with the physical data acquiring means 80, various kinds of physical data can be measured, such as, in addition to the height and the length of arms and legs of the user, sizes around the neck, around the upper arm, around the chest, around the waist, around the hips, around the thigh, and around the calf.
Before the training is started, the physical data acquiring means 80 can measure the physical data, and various settings of the support body 20 (for example, a top position (initial position) and a bottom position (maximum position to lower the barbell)) can be automatically adjusted based on the measured data. At this time, it is preferred that the locking plate 15a of the auxiliary support body 15 be fixed in the vicinity of the bottom position, and thus, for example, a display monitor 81 to be described later can be used to notify the user of the bottom position. Further, the physical data acquiring means 80 can measure the physical data before and after the training so that the contents of the training can be determined based on the data.
In this embodiment, the display monitor 81 is provided between the additional first support column 12e and the additional second support column 12f. As the display monitor 81, a mirror display having both functions of a mirror and a display, a digital signage, or the like can be used.
On the display monitor 81, various kinds of information can be displayed, such as a status of the user, training information, information related to injury, a more effective training method, and advertisements of training equipment and protein drinks.
The display monitor 81 may be provided as required, and can be omitted when not required. Further, a mirror without a display function can be provided between the additional first support column 12e and the additional second support column 12f in place of the display monitor 81.
Although description is omitted in the first and second embodiments, a lifting platform can be provided on a floor surface of the training space S1. As the lifting platform, an existing or new lifting platform, for example, a pantograph lifting platform can be used.
With the lifting platform being provided, training at a low position, for example, hip thrusts and squats, can be supported. The lifting platform may be provided as required, and can be omitted when not required.
Although description is omitted in the first and second embodiments, a measurement mat including a pressure sensor (pressure distribution sensor) can also be provided on the floor surface of the training space S1. With such a measurement mat being provided, the balance of loads applied to the feet at the time of training can be checked.
Although description is omitted in the first and second embodiments, placement stages (not shown) can be provided to both the support bodies 20 so that the user gripping the pull-up/chin-up bar 14 can place his or her legs thereon when performing the pull-up/chin-up training. The placement stages can be removed when the pull-up/chin-up training is not performed.
Through use of the placement stages, pull-up/chin-up training using the bodyweight called “chinning” can be effectively performed. It is difficult for a user having insufficient muscular strength to solely perform chinning in which the whole body weight is supported by grip and arm strength, and in general personal training, the chinning is performed under a state in which the spotter supports his or her legs, thereby being capable of increasing the training effect. However, in this embodiment, the placement stages can be used so that training similar thereto can be solely performed.
Specifically, the user can hang down from the pull-up/chin-up bar 14 and have his or her legs (knees) placed on the placement stages. The pull-up/chin-up can be performed under this state so that an effect similar to that in the case in which the chinning is performed with his or her legs being supported by the spotter can be obtained.
In the second embodiment, as an example, there is shown a case in which the training space S1 and the physical measurement space S2 are provided in one frame body 10, but the training space S1 and the physical measurement space S2 can be provided in different frame bodies 10. In this case, it is preferred that the physical measurement space S2 be provided in the vicinity of the frame body 10 forming the training space S1.
The training device and the barbell according to the present invention can be used at the gym, home, or the like as a highly-safe training device for free-weight training and a barbell to be used together with the training device.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2019-086352 | Apr 2019 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2020/017489 | 4/23/2020 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2020/218416 | 10/29/2020 | WO | A |
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| Jul. 28, 2020 International Search Report issued in International Patent Application No. PCT/JP2020/017489. |
| Jul. 28, 2020 Written Opinion issued in International Patent Application No. PCT/JP2020/017489. |
| Dec. 22, 2020 Office Action issued in Japanese Patent Application No. 2019-086352. |
| Number | Date | Country | |
|---|---|---|---|
| 20220184446 A1 | Jun 2022 | US |
