Patent Application
20220298813
The disclosure herein relates to a rebar tying tool.
Japanese Patent Application Publication No. 2017-132003 describes a rebar tying tool, This rebar tying tool is configured to tie rebars using a wire. The rebar tying tool includes a feeding unit, a twisting unit, a grip, a battery receptacle, and an indicator. The feeding unit is configured to feed the wire around the rebars. The twisting unit is configured to twist the wire around the rebars. The grip is disposed downward than the twisting unit and is configured to be gripped by an operator. The battery receptacle is disposed below the grip. The indicator is disposed on an upper surface of the battery receptacle and is configured to indicate a status of the rebar tying tool.
In the above rebar tying tool, the indicator is disposed on the upper surface of the battery receptacle. Due to this, upon performing a. tying operation, a hand of the operator gripping the grip overlaps over the indicator. As a result, the indicator becomes hidden by the hand of the operator, and the operator cannot easily visually recognize the indicator. The description herein discloses an art that facilitates an operator to visually recognize an indicator.
The present teachings disclose a rebar tying tool, The rebar tying tool is configured to tie rebars with a wire. The rebar tying tool may comprise: a feeding unit; a twisting unit; a grip; an indicator; and a facing surface. The feeding unit is configured to feed the wire around the rebars. The twisting unit is configured to twist the wire around the rebars. The grip is disposed downward than the twisting unit and configured to be gripped by an operator. The indicator is configured to indicate a status of the rebar tying tool. The facing surface is disposed frontward. than the grip and facing the grip. The indicator is disposed on the facing surface.
In the above configuration, when the operator grips the grip upon performing a tying operation, the facing surface is less likely to be hidden by a hand of the operator gripping the grip, and thus the indicator is also less likely to be hidden by the hand of the operator. Further, when the rebar tying tool is tilted, the indicator enters a field of view of the operator. Due to the foregoing, the operator can easily recognize the indicator visually upon performing the tying operation.
Further, a rebar tying tool may comprise: a feeding unit; a. twisting unit; a grip; and an indicator. The feeding unit is configured to feed the wire around the rebars. The twisting unit is configured to twist the wire around the rebars. The grip is disposed downward than the twisting unit and configured to be gripped by an operator. The indicator is configured to indicate a status of the rebar tying tool. The indicator is disposed on a side surface of the grip.
In the above configuration, since the indicator is disposed on a left side surface of the grip, the indicator enters the field of view of the operator when the rebar tying tool is tilted. Due to this, the operator can easily recognize the indicator visually.
In. one or more aspects, a rebar tying tool is configured to tie rebars with a wire. The rebar tying tool may comprise: a feeding unit; a twisting unit; a grip; an indicator; and a facing surface. The feeding unit may be configured to feed the wire around the rebars. The twisting unit may be configured to twist the wire around the rebars. The grip may be disposed downward than the twisting unit and configured to be gripped by an operator. The indicator may be configured to indicate a status of the rebar tying tool. The facing surface may be disposed frontward than the grip and facing the grip. The indicator may be disposed on the facing surface.
In the above configuration, when an operator grips the grip upon performing a tying operation, the facing surface is less likely to be hidden by a hand of the operator gripping the grip, and thus the indicator is also less likely to be hidden by the hand of the operator. Further, when the rebar tying tool is tilted, the indicator enters a field of view of the operator. Due to the foregoing, the operator can easily recognize the indicator visually.
In one or more aspects, the rebar tying tool may further comprise an adjusting unit configured to adjust a tying condition of the rebar tying tool. The adjusting unit may be disposed on the facing surface.
In the above configuration, the operator can operate the adjusting unit while seeing the indicator in a state of gripping the grip.
in one or more aspects, the facing surface may comprise a first facing surface overlapping with the grip and a second facing surface not overlapping with the grip when the rebar tying tool is viewed from behind. At least a part of the indicator may he disposed on the second facing surface.
In the above configuration, since at least a part of the indicator is disposed on the second facing surface, the indicator may enter a field of view of the operator even when the rebar tying tool is not tilted. Due to this, it becomes easier for the operator to visually recognize the indicator.
In one or more aspects, the facing surface may be disposed on a rear portion of a first accommodating part configured to accommodate a reel around which the wire is wound.
in the above configuration, since the first accommodating part is disposed in a space in front of the grip, a size of a part of the rebar tying tool upward than the grip can be reduced, and the rear portion of the first accommodating part can be utilized as the facing surface on Which the indicator is disposed.
In one or more aspects, the rebar tying tool may further comprise: a controller electrically connected to the indicator. The indicator may be disposed downward. than the twisting unit a.n.d disposed upward than. the controller.
in the above configuration, the indicator and the controller are connected by a cable.
Since the indicator is disposed downward than the twisting unit and upward than the controller, the indicator and the controller can be connected without extending the cable through the twisting unit. Due to this, an arrangement of the cable connecting the indicator and the controller can be suppressed from becoming complicated.
In one or more aspects, the rebar tying tool may further comprise: a facing part disposed downward than the twisting unit, wherein the facing surface is disposed on the facing part; a second accommodating part disposed downward than the grip and configured to accommodate the controller; and a first connecting cable that electrically connects the indicator and the controller. The facing part may be coupled to the second accommodating part via a coupler. The first connecting cable may extend from the facing part to the second accommodating part via the coupler.
In the above configuration, the first connecting cable extending from the facing part to the second accommodating part can be arranged without extending it through the twisting unit. Thus, the first. connecting cable can be suppressed from interfering with the twisting unit.
In one or more aspects, the feeding unit may comprise a feeding motor. The rebar tying tool may further comprise a second connecting cable that electrically connects the feeding motor and the controller. The feeding unit may be disposed downward than the twisting unit. The second connecting cable may extend from the feeding motor to the second accommodating part via the coupler.
In the above configuration, the second connecting cable extending from the feeding motor to the second accommodating part can be arranged without extending it through the twisting unit. Thus, the second. connecting cable can be suppressed from interfering with the twisting unit.
In one or more aspects, the rebar tying tool may further comprise: a detecting sensor configured to detect a rotation of a reel around which the wire is wound; and a third connecting cable that electrically connects the detecting sensor and the controller. The detecting sensor may be disposed downward than the twisting unit. The third connecting cable may extend from the detecting sensor to the second accommodating part via the coupler.
In the above configuration, the third connecting cable extending from the detecting sensor to the second accommodating part can be arranged without extending it through the twisting unit. Thus, the third connecting cable can be suppressed from interfering with the twisting unit.
In one or more aspects, a rebar tying tool is configured to tie rebars with a wire. The rebar tying tool may comprise: a feeding unit; a twisting unit; a grip; and an indicator. The feeding unit may be configured to feed the wire around the rebars. The twisting unit may be configured to twist the wire around the rebars. The grip may be disposed downward than the twisting unit and configured to be gripped by an operator. The indicator may be configured to indicate a status of the rebar tying tool. The indicator may be disposed on a side surface of the grip.
In the above configuration, since the indicator is disposed on the side surface of the grip, the indicator enters the field of view of the operator when the rebar tying tool is tilted. Due to this, the operator can easily recognize the indicator visually.
In one or more aspects, the rebar tying tool may further comprise: a trigger and an adjusting unit. The trigger may be configured to drive the feeding unit and the twisting unit based on an operation by the operator. The adjusting unit may be configured to adjust a tying condition of the rebar tying tool. The adjusting unit may be disposed near the trigger.
in the above configuration, since the adjusting unit is disposed near the trigger, the operator can operate both the trigger and the adjusting unit with the hand gripping the grip.
In one or more aspects, the adjusting unit may be disposed near the indicator,
In the above configuration, the operator can operate the adjusting unit while checking the indicator.
In one or more aspects, the rebar tying, tool may further comprise: a trigger lock configured to prohibit an operation of the trigger. The trigger lock may be disposed near the adjusting unit.
in the above configuration, since the trigger lock is disposed near the adjusting unit, the operator can operate the trigger lock with a finger that operates the adjusting unit.
In one or more embodiments, a rebar tying tool may tie rebars with a wire. The rebar tying tool may comprise: a feeding unit configured to feed the wire around the rebars; a twisting unit configured to retain and twist the wire around the rebars; a main body configured to accommodate the feeding unit and the twisting unit; and a contacting member disposed in front of the twisting unit and configured to come into contact with the rebars upon a tying, operation. A contacting position at which the contacting member comes into contact with the rebars and a retaining position at which the twisting unit retains the wire may be configured to move relative to each other in directions separating away from one another in a state where the twisting unit is retaining the wire.
In the above configuration, in the state where the twisting unit is retaining the wire, the wire is pulled when the contacting position and the retaining position move relative to each other in the directions separating away from one another. As a result, the wire can be suppressed from being twisted in a state where the wire is loosened. Due to this, tying force of the wire on the rebars can be increased.
In one or more embodiments, in the state where the twisting unit is retaining the wire, the contacting position may be configured to move frontward with respect to the main body.
In the above configuration, by moving the contacting position frontward with respect to the main body, the contacting position and the retaining position can be moved relative to each other in directions separating away from one another.
In one or more embodiments, the rebar tying tool may further comprise a pushing part configured to push the contacting member frontward with respect to the main body.
In the above configuration, by pushing the contacting member frontward with respect to the main body using the pushing part, the contacting position and the retaining position can be moved relative to each other in directions separating away from one another.
in one or more embodiments, the pushing part may comprise: a first push rod disposed facing the contacting member behind the contacting member and configured to move in a front-rear direction with respect to the main body; a second push. rod disposed facing the first push rod behind the first push rod and configured to move in the front-rear direction with respect to the main body; and a compression spring coupling the first push rod and the second push rod.
In the above configuration, an excessive load can be suppressed from being: applied to the contacting member by contraction of the compression spring, and the rebar tying tool can be suppressed from being damaged.
In one or more embodiments, the pushing part may further comprise a push plate disposed facing the second push rod behind the second push rod and configured to move in the front-rear direction with respect to the main body. The push plate may be configured to move frontward with respect to the main body following a motion of the twisting unit.
In the above configuration, the second push rod moves frontward with respect to the main body by the push plate pushing the second push rod frontward. Due to this, the contacting member can be pushed frontward with respect to the main body following the motion of the twisting unit.
In one or more embodiments, the push plate may comprise a recess into which a rear end of the second push rod enters at a position of the push plate facing the second push rod.
In the above configuration, a position of the second push rod with respect to the push plate is fixed by the rear end of the second push rod entering the recess. Due to this, the second push rod can stably be moved frontward.
In one or more embodiments, the pushing part may further comprise a rod guide configured to guide movements of the first push rod and the second push rod,
In the above configuration, the first push rod and the second push rod move in. the front-rear direction in a state of being guided by the rod guide. Due to this, the first push rod and the second push rod can stably be moved in the front-rear direction.
In one or more embodiments, the contacting member may be supported by the main body pivotably about a pivot axis. The rebar tying tool may further comprise a biasing member configured to bias the contacting member with respect to the main body such that the contacting member pivots rearward in a closing direction with respect to the main body when the contacting member pivoted frontward in an opening direction. with respect to the main body.
In the above configuration, even when the contacting member pivoted frontward in the opening direction, a biasing force by the biasing member is applied to the contacting member, and the contacting member can thereby be returned to a state of being dosed rearward.
In one or more embodiments, the contacting member may comprise: a first contacting part supported by the main body pivotably about a first pivot axis; and a second contacting part disposed separately from the first contacting part and. supported by the main body pivotably about a second pivot axis.
In the above configuration, since the first contacting part and the second contacting part are disposed separately, a load applied from the rebars to the contacting member can be distributed.
In one or more embodiments, in the state where the twisting unit is retaining the wire, the retaining position may be configured to move rearward with respect to the main body.
In the above configuration, by moving the retaining position rearward with respect to the main body, the contacting position and the retaining position can be moved relative to each other in directions separating away from one another.
In one or more embodiments, in the state where the twisting unit is retaining the wire, the contacting position may be configured to move rearward with respect to the main body.
in the above configuration, when the wire is twisted by the twisting unit in a state where the wire is in tight contact with the rebars, the contacting position moves rearward. Due to this, the rebars move rearward relatively with respect to the rebar tying tool, by which tension on the wire is adjusted. As a result, with such a simple configuration, the rebar tying tool can be suppressed from being damaged due to an excessive load being applied to the contacting member and the twisting unit.
In one or more embodiments, the rebar tying tool may further comprise a. pullback unit configured to pull back the wire that is wrapped around the rebus. The contacting position may be configured to move rearward with respect to the main body when the contacting member comes into contact with the rebars while winding the wire.
In the above configuration, when the wire that is wrapped around the rebars is pulled back by the pullback unit, the wire comes into tight contact with the rebars. When the wire around the rebars is further pulled back, the contacting position moves rearward. Due to this, the rebars move relatively rearward with respect to the rebar tying tool. As a result, the tension on the wire is reduced as compared to a case where an interval between the rebus and the twisting unit is maintained constant. Due to this, the rebar tying tool can be suppressed from being damaged due to an excessive load being applied to the contacting member and the twisting unit.
In one or more embodiments, the contacting member may be configured to move rearward together with the rebars with respect to the main body when it comes into contact with the rebars.
In the above configuration, the contacting member moves rearward together with the rebars upon the tying operation. Due to this, a load applied to the contacting member can be reduced as compared to a case in which the contacting member does not move rearward together with the rebars, that is, a case where the contacting position moves rearward due to the contacting member composed for example of an elastic material deforming elastically. As a result, the rebar tying tool can be suppressed from being damaged.
In one or more embodiments, the rebar tying tool may further comprise an elastic member configured to deform elastically as the contacting member moves rearward together with the rebars.
In the above configuration, a load applied to the main body from the rebars through the contacting member can be suppressed by elastic deformation of the elastic member.
In one or more embodiments, the contacting member may comprise: a first contacting part; and a second contacting part disposed apart from the first contacting part. The first contacting part and the; second contacting part may come into contact with the rebars upon the tying operation.
In the above configuration, the rebars come into contact with. the contacting member at two points upon the tying operation. Due to this, the rebars can stably be brought into contact with the contacting member as compared to a case in which the rebars come into contact with the contacting member at one point.
In one or more embodiments, one end of the first contacting part on a rebars side and one end of the second contacting part on the rebars side may be curved in directions separating away from one another.
In the above configuration, the rebars come into contact with these curved portions of the contacting member. Due to this, durability of the contacting member can be improved.
In one or more embodiments, the first contacting part and the second contacting part may each extend in a. separating direction of the first contacting part and the second contacting part and a direction perpendicularly intersecting the front-rear direction.
In the above configuration, the rebars can be suppressed from separating away from the contacting member even when a position of the rebars is displaced in the separating directions and the direction perpendicularly intersecting the front-rear direction.
In one or more embodiments, the contacting member may further comprise a coupler coupling the first contacting part and the second contacting part.
In the above configuration, strength of the contacting member can be improved, Further, since the first contacting part and the second contacting part move integrally, an orientation of the rebar tying tool can be suppressed from being changed upon the tying operation.
A rebar tying tool 2 of a first embodiment will be described with reference to
As shown in
The grip 6 is a member for an operator to grip. The grip 6 is arranged at a rear lower portion of the main body 4. The grip 6 is integrated with the main body 4. The grip 6 comprises a left grip 6a and a right grip 6a. The left grip 6a composes an outer shape of a left half of the grip 6. The right grip 6a composes an outer shape of a right half of the grip 6. The left grip 6a and the right grip 6a are fixed by screws 7.
A trigger 10 is disposed at a. front upper portion of the grip 6. When the trigger 10 is pressed in, a tying operation of tying the rebars R with the wire W is started.
A trigger lock 12 is attached to an upper left side surface of the grip 6. The trigger lock 12 is disposed near a connecting position of the main body 4 and the grip 6. The trigger lock 12 is disposed near the trigger 10. The trigger lock 12 is configured to move between an allowing position and a prohibiting position. When the trigger lock 12 is in the allowing position, a press-in operation on the trigger 10 is allowed. When the trigger lock 12 is pressed in by the operator and moves from the allowing position to the prohibiting position, the trigger lock 12 comes into contact with a stopper (not shown) of the trigger 10. Due to this, the press-in operation on the trigger 10 is thereby prohibited.
The battery receptacle 8 is disposed below the grip 6. The battery receptacle 8 is integrated with the grip 6. The battery receptacle 8 comprises a left battery receptacle 8a and a right battery receptacle 8b. The left battery receptacle 8a composes an outer shape of a left half of the battery receptacle 8. The right battery receptacle 8b composes an outer shape of a right half of the battery receptacle 8. The left battery receptacle 8a and the right battery receptacle 8b are fixed by screws 9a, 9b.
A battery B is detachably attached to the battery receptacle 8. The battery B may for example be a lithium ion battery. As shown in
As shown in
As shown in
As shown in
The indicator 34 is configured to display a status of the rebar tying tool 2, such as a tying condition for tying the wire W around the rebars R and remaining charge in the battery B. The adjusting unit 36 is a member for setting the tying condition, such as a winding number of the wire
W on the rebars R. and a twisting intensity of the wire W. In the present embodiment, the adjusting unit 36 comprises two microswitches 36a, 36b. When the microswitch 36a is pressed, the controller 22 increases the winding number of the wire W (or increases the twisting intensity of the wire W), and When the microswitch 36b is pressed, the controller 2.2 decreases the winding number of the wire W (or decreases the twisting intensity of the wire W). The adjusting unit 36 is not limited to the microswitches 36a, 36b, and may comprise a dial switch.
As shown in
When the feeding motor 48 is driven forward, the feeding part 50 feeds the wire W wound on the reel 30 to the guiding part 52 by forward rotation of its roller 54. The guiding part 52 guides the wire W fed from the feeding part 50 in a loop shape around the rebars R. Further, when the feeding motor 48 is driven in reverse, the feeding part 50 pulls back the wire W toward the reel 30 from the guiding part 52 by reverse rotation of its roller 54.
The cutter unit 42 comprises a cutter that is not shown. The cutter is configured to cut the wire W by pivoting following motion of the twisting unit 44.
The twisting unit 44 is accommodated in the main body 4. The twisting unit 44 extends frontward from an internal rear portion of the main body 4. Further, the indicator 34 and the adjusting unit 36 are disposed downward than the twisting unit 44. The twisting unit 44 comprises a twisting motor 58 and a retaining part 60. The twisting motor 58 is configured to be driven by electric power supplied from the battery B. The twisting motor 58 is controlled by the controller 22, Rotation of the twisting motor 58 is transmitted to the retaining part 60,
The retaining part 60 is configured to move out, move in, and rotate following the rotation of the twisting motor 58, The retaining part 60 comprises a retaining member 62. The retaining member 62 is arranged at a front portion of the retaining part 60. The retaining member 62 comprises two members 62a, 62h that overlap each other in the up-down direction, The retaining member 62 is configured to switch between a fully closed state, a half-opened state, and a fully opened state following the rotation of the twisting motor 58 by its two members 62a, 62b moving in directions approaching each other in the left-right direction. Although detailed description on the configuration of the retaining member 62 will be omitted, when the retaining member 62 switches from the fully opened state to the half-opened state, it retains one point on the wire W around the rebars R. When the retaining member 62 switches from the half-opened state to the fully closed state, it further retains another point on the wire W around the rebars R.
As shown in
The first contacting part 70 is disposed apart from the second contacting part, 72 toward the left. The first contacting part 70 comprises a front portion 80 and a rear portion 82. The front portion 80 extends in the up-down direction. A front end 80a of the front portion 80 curves in a direction separating away from the second contacting part 72 (that is, leftward). The rear portion 82 extends rearward from a rear upper portion of the front portion 80. A first opening 84 is defined at an intermediate position of the rear portion 82 in the front-rear direction. The first opening 84 penetrates the rear portion 82 in the left-right direction.
A shape of the second contacting part 72 is in a symmetric relationship with a shape of the first contacting part 70 with respect to a plane perpendicularly intersecting the left-right direction. That is, a shape of each of a front portion 90 and a rear portion 92 of the second contacting part 72 is in a symmetric relationship with a shape of corresponding one of the front portion 80 and the rear portion 82 of the first contacting part 70 with respect to the plane perpendicularly intersecting the left-right direction. A front end 90a of the front portion 90 of the second contacting part 72 curves in a direction separating away from the first contacting part 70 (that is, rightward). Further, a second opening 94 penetrates the rear portion 92 of the second contacting part 72 in the left-right direction. A support shaft 98 shown in
As shown in
As shown in
Next, the tying operation of the wire W onto the rebars R will be described. Prior to performing the tying operation, the retaining member 62 of the twisting unit 44 is maintained in the fully opened state. When the trigger 10 is pressed in by the operator in a state of having the rebar tying tool 2 set on the rebars R such that the rebars R are in contact with the first contacting part 70 and the second contacting part 72, the tying operation is started by control of the controller 22. As shown in
From this state, when the driving of the feeding motor 48 is stopped and the twisting motor 58 is driven, the retaining member 62 switches from the fully opened state to the half-opened. state. Due to this, a tip end of the wire W is retained by the retaining member 62.
From this state, when the twisting motor 58 stops to drive and the feeding motor 48 is driven in reverse, the feeding part. 50 pulls the wire W back from the rebars R. Since the tip end of the wire W is retained by the retaining member 62, the loop of the wire W around the rebars R is tightened as the wire W is pulled back, and the wire W comes tightly in contact with the rebars R. Even if the wire W is further pulled back from this state, since a biasing force applied by the elastic member 68 on the contacting member 66 is greater than a pushing force by which the rebars R push the contacting member 66 due to tension on the wire W, the contacting member 66 thus does not pivot. When it is determined by the controller 22 that torque applied to the feeding motor 48 (such as a current value of the feeding motor 48) exceeded a certain value, the feeding motor 48 is stopped.
From this state, when the twisting motor 58 is driven, the retaining member 62 switches from the half-opened state to the fully closed state. Due to this, a rear end of the wire W is retained by the retaining member 62. When the twisting motor 58 is further driven, the wire W is cut by pivoting of the cutter of the cutter unit 42. Due to this, two points, being the tip end and the rear end of the wire W, are retained by the retaining member 62 in the state where the wire W is in tight contact with the rebars R.
From this state, when the twisting motor 58 is driven, the retaining part 60 moves rearward (that is, toward the twisting motor 58). The tip end and. the rear end of the wire W retained by the retaining member 62 move rearward. Due to this, they are pulled rearward in the state where the wire W is in tight contact with the rebars R. As the tip end and the rear end of the wire W move, the tension on the wire W increases, and the pushing force by which the rebars R. push the contacting member 66 increases. When the pushing three becomes greater than the biasing force applied by the elastic member 68 on the contacting member 66, the rebar tying tool 2 is drawn toward the rebars R as shown in
When the retaining part 60 moves rearward over a predetermined distance, rearward movement of the retaining part 60 is stopped and the retaining part 60 rotates, by which the wire W is twisted. As the wire W is twisted, a length of the wire W in the front-rear direction becomes shorter. Due to this, the tension on the wire W is further increased, and the pushing force by which the rebars R push the contacting member 66 also increases even more. As a result, the rebar tying tool 2 is drawn toward the rebars R, and the contacting member 66 further pivots rearward about the support shaft 98. While the retaining part 60 is twisting the wire W, when it is determined by the controller 22 that torque applied to the twisting motor 58 (such as a current value of the twisting motor 58) exceeded a certain value, the twisting motor 58 is stopped from driving. After this, series of operations for returning arrangement of respective constituent components of the rebar tying tool 2 to their state prior to the tying operation are performed by control of the controller 22.
During the aforementioned series of operations, the elastic member 68 biases the contacting member 66 frontward. Due to this, the state of contact between the contacting member 66 and the rebars R is maintained during the tying operation.
The rebar tying tool 2 of the present embodiment is configured to tie rebars R with the wire W The rebar tying tool 2 comprises: the feeding unit 40; the twisting unit 44; the grip 6; the indicator 34; and the rear surface 24. The feeding unit 40 is configured to feed the wire W around the rebars R. The twisting unit 44 is configured to twist the wire W around the rebars R. The grip 6 is disposed downward than the twisting unit 44 and configured to be gripped by an operator. The indicator 34 is configured to indicate a status of the rebar tying tool 2. The rear surface 24 is disposed frontward than the grip 6 and facing a front surface of the grip 6. The indicator 34 is disposed on the rear surface 24. In the above configuration, when the operator grips the grip 6, the rear surface 24 is less likely to be hidden by a hand of the operator gripping the grip 6, and thus the indicator 34 is also less likely to be hidden by the hand of the operator. Further, when the rebar tying tool 2 is tilted, the indicator 34 enters a field of view of the operator. Due to the foregoing, the operator can easily recognize the indicator 34 visually.
The rebar tying tool 2 further comprises the adjusting unit 36 configured to adjust the tying condition of the rebar tying tool 2. The adjusting unit 36 is disposed on the rear surface 24. In the above configuration, the operator can operate the adjusting unit 36 while seeing the indicator 34 in a state of gripping the grip 6.
The rear surface 24 comprises the first rear surface 24a overlapping with. the grip 6 and the second rear surface 24b not overlapping with the grip 6 when the rebar tying tool 2 is viewed from behind. At least a part of the indicator 34 is disposed on the second rear surface 24b. In the above configuration, the indicator 34 might enter the field of view of the operator even when the rebar tying tool 2 is not tilted. Due to this, it becomes easier for the operator to visually recognize the indicator 34.
The rear surface 24 is disposed on the rear portion of the accommodating part 16 configured to accommodate the reel 30 around which the wire W is wound. In the above configuration, since the accommodating part 16 is disposed in a. space in front of the grip 6, a size of a part of the rebar tying tool 2 that is upward than the grip 6 (that is, main body 4) can be reduced, and the rear portion of the accommodating part 16 can be utilized as the rear surface 24 on which the indicator 34 is disposed.
The rebar tying tool 2 further comprises: the controller 22 electrically connected to the indicator 34. The indicator 34 is disposed below the twisting unit 44 and disposed above the controller 22. In the above configuration, the indicator 34 and the controller 22 are connected by a cable. Since the indicator 34 is disposed downward than the twisting unit 44 and upward than the controller 22, the indicator 34 and the controller 22 can be connected without extending the cable through the twisting unit 44. Due to this, an arrangement of the cable connecting the indicator 34 and the controller 22 can be suppressed from becoming complicated.
Further, the rebar tying tool 2 is configured to tie the rebars R with the wire W. It comprises the feeding unit 40, the twisting unit 44, the main body 4, and the contacting member 66. The feeding unit 40 is configured to feed the wire W around the rebars R. The twisting unit 44 is configured to twist the wire W around. the rebars R. The main body 4 is configured to accommodate the feeding unit 40 and the twisting unit 44. The contacting member 66 is disposed in front of the twisting unit 44 and is configured to come into contact with the rebars R upon the tying operation. In the state where the twisting unit 44 is retaining the wire W, a contacting position at which the contacting member 66 comes into contact with the rebars R and a retaining position at which the twisting unit 44 retains the wire are configured to move relative to each other in directions separating away from one another. In the state where the twisting unit 44 is retaining the wire W, the retaining position is configured to move rearward with respect to the main body 4. In this configuration, by moving the retaining position rearward with respect to the main body 4, the contacting position and the retaining position can be moved relative to each other in directions separating away from one another.
In the state where the twisting unit 44 is retaining the wire W, the contacting position is configured to move rearward with respect to the main body 4. In the above configuration, when the wire W is twisted by the twisting unit 44 in a state where the wire W is in tight contact with the rebars R, the contacting position moves rearward with respect to the main body 4. Due to this, the rebars R move rearward relatively with respect to the rebar tying tool 2. As a result, the tension on the wire W is reduced as compared to a case where an interval between the rebars R and the twisting unit 44 is maintained constant. As a result of this, the rebar tying tool 2 can be suppressed from being damaged due to an excessive load being applied to the contacting member 66 and the twisting unit 44.
The contacting member 66 is configured to move rearward together with the rebars R with respect to the main body 4 when it comes into contact with the rebars R. in the above configuration, the contacting member 66 moves rearward together with the rebars R upon the tying operation. Due to this, a load applied to the contacting member 66 can be reduced as compared to a case in which the contacting member 66 does not move rearward together with the rebars R, that is, a case where the contacting position moves rearward due to the contacting member 66 composed for example of an elastic material deforming elastically. As a result, the rebar tying tool 2 can be suppressed from being damaged.
The rebar tying tool 2 further comprises the elastic member 68 configured to deform elastically as the contacting member 66 moves rearward together with the rebars R. in this configuration, a load applied to the main body 4 from the rebars R through the contacting member 66 can be suppressed by elastic deformation of the elastic member 68.
The contacting member 66 comprises: the first contacting part 70; and the second contacting part 72 disposed apart from the first contacting part 70. The first contacting part 70 and the second contacting part 72 come into contact with the rebars R. upon the tying operation.
In this configuration, the rebars R come into contact with the contacting member 66 at two points in the left-right direction upon the tying operation. Due to this, the rebars R can stably be brought into contact with the contacting member 66 as compared to a case in which the rebus R come into contact with the contacting member 66 at one point.
The front end 80a of the first contacting part 70 and the front end 90a of the second contacting part 72 are curved in directions separating away from one another. In this configuration, the rebars R come into contact with these curved portions of the contacting member 66. Due to this, durability of the contacting member 66 can be improved.
The first contacting part 70 and the second contacting part 72 each extend in the up-down. direction. In the above configuration, the rebars R can be suppressed from separating away from the contacting member 66 even when a position of the rebars R is displaced in up-down direction.
The contacting member 66 further comprises the coupler 74 coupling the first contacting part 70 and the second contacting part 72. In this configuration, strength of the contacting member 66 can be improved. Further, since the first contacting part 70 and the second contacting part 72. move integrally, an orientation of the rebar tying tool 2 can be suppressed from being changed upon the tying operation.
(Corresponding Relationship)
The rear surface 24 is an example of “facing surface”, the feeding unit 40 is an example of “pullback unit”, the front end 80a is an example of “one end of the first contacting part on a rebars side”, and the :front end 90a is an example of “one end of the second contacting part on the rebars side”.
A variant of the first embodiment will be described. In the variant of the first embodiment, points that differ from the first embodiment will be described, and explanations on points that are same as the first embodiment will be omitted. In the variant of the first embodiment, the elastic member 68 has a smaller elastic coefficient as compared to the elastic member 68 of the first embodiment, in other words is more contractable (elastically deformable). In the variant of the first embodiment, when the wire W is pulled back from the rebars ft by the feeding part 50 in the tying operation of the wire W onto the rebars R, the contacting member 66 thereby pivots. Specifically, when the wire W is pulled back from the rebars R by the feeding part 50, the loop of the wire W around the rebars R is tightened, and the wire W tightly contacts around the rebars R. From this state, as the wire W is further pulled back, the tension on the wire W increases, and the pushing three by which the rebars R push the contacting member 66 increases. When the pushing force becomes greater than the biasing three applied by the elastic member 68 on the contacting member 66, the rebar tying tool 2 is drawn toward the rebars R., and the contacting member 66 pivots rearward about the support shaft 98.
In the present embodiment, the rebar tying tool 2 further comprises the feeding unit 40. The feeding unit 40 is configured to pull back the wire W that is wrapped around the rebars R. When the contacting member 66 comes into contact with the rebars R upon pulling back the wire W, the contacting position can thereby move rearward with respect to the main body 4. In this configuration, when the wire W that is wrapped around the rebars R is pilled back by the feeding unit 40, the wire W comes into tight contact with the rebars R. When the wire W around the rebars R is further pulled back in this state, the contacting position moves rearward. Due to this, the rebars R move rearward relatively with respect to the rebar tying tool 2. As a result, the tension on the wire W is reduced as compared to a case where an interval between the rebars R and the twisting unit 44 is maintained constant. Due to this, the rebar tying tool 2 can be suppressed from being damaged due to an excessive load being applied to the contacting member 66 and the twisting unit 44.
A second embodiment will be described with reference to
The rebar tying tool 2 of the present embodiment is configured to tie the rebars R. with the wire W. The rebar tying tool 2 comprises: the feeding unit 40; the twisting unit 44; the grip 6; and the indicator 34. The feeding unit 40 is configured to feed the wire W around the rebars R. The twisting unit 44 is configured to twist the wire W around the rebars R. The grip 6 is disposed downward than the twisting unit 44 and configured to be gripped by an operator. The indicator 34 is configured. to indicate a status of the rebar tying tool 2. The indicator 34 is disposed on the left side surface 6c of the grip 6. In this configuration, since the indicator 34 is disposed on the left side surface 6c of the grip 6, the indicator 34 enters the field of view of the operator when the rebar tying tool 2 is tilted, for example when the rebar tying tool 2 is tilted as if the rebar tying tool 2 is rotated around an axis extending along the up-down. direction. Due to this, the operator can easily recognize the indicator 34 visually.
The rebar tying tool 2 further comprises: the trigger 10 and the adjusting unit. 36. The trigger 10 is configured to drive the feeding unit 40 and the twisting unit 44 based on an operation by the operator. The adjusting unit 36 is configured to adjust a tying condition of the rebar tying tool 2. The adjusting unit 36 is disposed near the trigger 10. In this configuration, the operator can operate both the trigger 10 and the adjusting unit 36 with the hand gripping the grip 6.
The adjusting unit 36 is disposed near the indicator 34. In the above configuration, the operator can operate the adjusting unit 36 while checking the indicator 34.
The rebar tying tool 2 further comprises: the trigger lock 12 configured to prohibit an operation of the trigger 10. The trigger lock 12 is disposed near the adjusting unit 36, In this configuration, the operator can operate the trigger lock 12 with a finger that operates the adjusting unit 36.
A rebar tying tool 202 of a third embodiment will be described with reference to FIGS. to 34. In the third embodiment, explanations on points that are same as the first embodiment are omitted. As shown in
The grip 206 is configured to be gripped by the operator. The grip 206 is connected to a rear lower portion of the main body 204. The grip 206 is integrated with the main body 204, The grip 206 comprises a right grip 206a that composes an outer shape of its right half and a left grip 206b that composes an outer shape of its left half.
A trigger 212 is attached at an upper portion of a front surface of the grip 206. The trigger 212 is configured to be operated by the operator. As shown in
As shown in
The battery receptacle 208 is connected to a lower portion of the grip 206. The battery receptacle 208 is integrated with the grip 206. The battery B is detachably attached to the battery receptacle 208. The battery receptacle 208 comprises a right battery receptacle 208a that composes an outer shape of its right half and a left battery receptacle 208h that composes an outer shape of its left half. A coupler 209 is arranged on a front upper portion of the battery receptacle 208. The coupler 209 is integrated with the battery receptacle 208. As shown in
The rebar tying tool 202 further comprises a controller 220. The controller 220 is accommodated in the battery receptacle 208. The controller 220 and the trigger switch 213 are electrically connected by a fifth connecting cable 221. The fifth connecting cable 221 extends from the trigger switch 213 through inside the grip 206, and further extends inside the battery receptacle 208 to the controller 220. When the trigger 212 is pressed in, the controller 220 detects a signal from the trigger switch 213 and executes control for starting a. tying operation for tying a wire W around rebars R.
As shown in
The indicator 218 and the controller 220 are electrically connected by a sixth connecting cable 219 (see
As shown in
An indicator 234 and an adjusting unit 236 are disposed on the rear surface 222a of the accommodating part main body 222. The indicator 234 is configured to display a status of the rebar tying tool 202, such as a tying condition for tying the wire W around the rebars R. and remaining charge in the battery B. The adjusting unit 236 is configured to accept an operation by the operator for adjusting a tying force of the wire W. In the present embodiment, the adjusting unit 236 comprises two microswitches 236a, 236b. When the microswitch 236a is operated, a set value of the tying force of the wire W increases by one level, and when the microswitch 236b is operated, the set value of the tying three of the wire W decreases by one level. The adjusting unit 236 is not. limited to the microswitches 236a, 236b, and may comprise a dial switch.
As shown in
As shown in
As shown in
When the reel 232 rotates in the state where the reel 232 is set in the accommodating space 230, the permanent magnets 248a, 248b rotate accompanying rotation of the rotating base 246, and magnetics detected by the magnetic sensor 242a thereby change. The rotation of the reel 232 is detected by this change in the magnetics detected by the magnetic sensor 242a.
As shown in
The rebar tying tool 202 comprises a feeding unit 250, a cutter unit 252, and a twisting unit 254. The feeding unit 250 is disposed at the front lower portion of the main body 204. As shown in
The feeding motor 256, the reduction gear unit 258, and the feeding part 260 are accommodated in the main body 204. The feeding motor 256 may for example be a brushless motor. The feeding motor 256 is disposed on the right side of the right main body 204a, and is covered by the motor cover 204c (see
As shown in
The feeding part 260 comprises a base part 270, a guide part 272, a driving roller 274, a driven roller 276, a link part 278, and a biasing part 280. The base part 270 is fixed to the right main body 204a. The guide part 272 is fixed to the base part 270. The guide part 272 includes a guide hole 272a through which the wire W is inserted.
The driving roller 274 is rotatably supported by the base part 270. Teeth 274a and a groove .274b are arranged on an outer circumferential surface of the driving roller 274. The teeth 274a mesh with an output gear 258a of the reduction gear unit 258. The output gear 258a is configured to rotate by the rotation of the feeding motor 256. The groove 274b is defined on the outer circumferential surface of the driving roller 274 along a direction of rotation of the driving roller 274. The driven roller 276 is rotatably supported by the link part 278. Teeth 276a and a groove 276b are arranged on an outer circumferential surface of the driven roller 276. The teeth 276a of the driven roller 276 mesh with the teeth 274a of the driving roller 274. The groove 276b extends along a direction of rotation of the driven roller 276 on the outer circumferential surface of the driven roller 276.
The link part 278 is pivotably supported by the base part 270 via a pivot shaft 278a. One end of the biasing part 280 is in contact with a lower portion of the link part 278 and another end of the biasing part 280 is in contact with the right main body 204a. The biasing part 280 is configured to bias the link part 278 with respect to the right main body 204a in a direction along which the driven roller 276 approaches toward the driving roller 274. Due to this, the driven roller 276 is pressed against the driving roller 274. As a result, the wire W is held between the groove 274b of the driving roller 274 and the groove 2761 of the driven roller 276. As shown in
As shown in
As shown in.
The coupler 288 couples the lever 286 and the cam part 290. The coupler 288 is integrated with the cam part. 290. The coupler 288 is fixed to the lever 286 by a screw 294. The coupler 288 penetrates the left surface of the left main body 204b.
The cam part 290 is disposed inside the main body 204. The cam part 290 is configured. to pivot integrally with the lever 286. The cam part 290 comprises an edge 296. A left surface 296a of the edge 296 is parallel to a plane that perpendicularly intersects the pivot axis RX1. Further, the left surface 296a of the edge 296 faces an inner surface of the left main body 204b. A recess 292 is defined on the left surface 296a of the edge 296. The recess 292 is recessed rightward from the left surface 296a of the edge 296. A position of the recess 292 is fixed with respect to the cam part 290. As shown in
As shown in
The coupler 288 extends through inside a third biasing member 304. The third biasing member 304 may for example be a compression spring, The third biasing member 304 is inserted in the fixing member 300 so as to surround the coupler 288. One end of the third biasing member 304 is in contact with the left surface 296a of the cam part. 290 and another end of the third biasing member 304 is in contact with the inner surface of the left main body 204b. The third biasing member 304 is configured to bias the cam part 290 rightward with respect to the left main body 204b. DUO to this, the lever 286 is pressed against the outer surfaces of the left main body 204b and the cover member 224. As a result, wobbling of the operating part 284 is suppressed.
As shown in
As shown in FIG, 18, the first lever member 312 and the second lever member 314 are fixed to each other. The first lever member 312 and the second lever member 314 are capable of pivoting about a pivot axis RX2. Lower ends of the first lever member 312 and the second lever member 314 are pivotably coupled to a rear end of the link member 316. A front end of the link member 316 is pivotably coupled to a lower end of the movable cutter member 310, The rear end of the link member 316 is biased frontward by a torsion spring 318. When the first lever member 312 and the second lever member 314 pivot in a direction along which the lower ends thereof move frontward, the link member 316 moves frontward. On the other hand, as shown in
As shown in
The reduction gear unit 324 shown in
As shown in FIG, 21, the retaining part 326 comprises a bearing box 334, a carrier sleeve 336, a clutch plate 338, a screw shaft 340, an inner sleeve 342, an outer sleeve 344, a clamp shaft 346, a right clamp 348, and a left clamp 350.
The bearing box 334 is fixed to the reduction gear unit 324. The bearing box 334 rotatably supports the carrier sleeve 336 via a bearing 334a. Rotation is transmitted from the reduction gear unit 324 to the carrier sleeve 336. When the twisting motor 322 rotates forward, the carrier sleeve 336 rotates in a left-hand screw direction as seen from behind. When the twisting motor 322 rotates in reverse, the carrier sleeve 336 rotates in a right-hand screw direction as seen from behind.
As shown in
A rear part 340a of the screw shaft 340 is inserted into the carrier sleeve 336 from the front side, and is fixed to the clutch plate 338. A flange 340c projecting in a radial direction is arranged between the rear part 340a and a front part 340b of the screw shaft 340. A spiral ball groove 340d is defined in an outer circumferential surface of the front part 340b of the screw shaft 340. An engaging part 340e with a smaller diameter than the front part 340h is arranged at a front end of the screw shaft 340.
As shown in
The clamp shaft 346 is inserted into the inner sleeve 342 from the front side. The engaging part 340e of the screw shaft 340 is inserted in a rear end of the clamp shaft 346. The clamp shaft 346 is fixed to the screw shaft 340. As shown in
As shown in.
As shown in
As shown in
As shown in
As shown in
As shown in
In the initial state where the clamp shaft 346 protrudes frontward from the outer sleeve 344, the left clamp 350 is positioned at farthest left with respect to the clamp shaft 346. In this state, a left wire passage 424 through which the wire W can extend is secured between the first projection 400 of the left clamp 350 and the fiat plate part 370 of the clamp shaft 346. This state of the left clamp 350 is termed a fully opened state. From this state, when the outer sleeve 344 moves forward with respect to the clamp shaft 346, the left clamp 350 moves rightward with. respect to the clamp shaft 346. In this state as well, the wire W can extend through the left wire passage 424, however, a rear portion of the left wire passage 424 is covered by the rear guard 404 and a front portion of the left wire passage 424 is covered by the front guard 406. This state of the left clamp 350 is termed a half-opened state. From this state, when the outer sleeve 344 further moves forward with respect to the clamp shaft 346, the left clamp 350 further moves rightward with respect to the clamp shaft 346. In this state, the wire W is held between an upper end of the contacting part 402 of the left clamp 350 and a lower end of the flat plate part 370 of the clamp shaft 346. This state of the left clamp is termed a fully closed state.
The wire W fed from the feeding part 260 to the guiding part 262 passes through the left wire passage 424 before it reaches the guiding part 262. Due to this, when the left clamp 350 enters the fully closed state and the wire W is cut by the cutter unit 252, a trailing end of the wire W wrapped around the rebars R is retained by the left clamp 350 and the clamp shaft 346.
Further, the wire W guided in the guiding part 262 passes through the right wire passage 422. Due to this, when the right clamp 348 enters the fully closed state, a tip end of the wire W wrapped around the rebars R. is retained by the right clamp 348 and the clamp shaft 346.
As shown in
As shown in
When the twisting motor 322 rotates forward with respect to the upper stopper 438 and the screw shaft 340 rotates in the left-hand screw direction as seen from behind, the rotation of the outer sleeve 344 is prohibited by the upper stopper 438 when the fins 428 of the outer sleeve 344 come into contact with the restriction piece 450. On the other hand, when the twisting motor 322 rotates in reverse and the screw shaft 340 rotates in the right-hand screw direction as seen from behind, the fins 428 of the outer sleeve 344 pushes in the restriction piece 450 even after they come into contact with the restriction piece 450. In this case, the upper stopper 438 does not prohibit the rotation of the outer sleeve 344.
When the twisting motor 322 rotates forward with respect to the lower stopper 440 and the screw shaft 340 rotates in the left-hand screw direction as seen from behind, the fins 428 of the outer sleeve 344 push in the restriction piece 452 even after they come into contact with the restriction piece 452. In this case, the lower stopper 440 does not prohibit the rotation of the outer sleeve 344. On the other hand, When the screw shaft 340 rotates in the right-hand screw direction as seen from behind, the rotation of the outer sleeve 344 is prohibited by the lower stopper 440 when the fins 428 of the outer sleeve 344 come into contact with the restriction piece 452.
As shown in
The contacting member 458 is disposed close to the front end of the main body 204. The contacting member 458 is disposed frontward than the twisting unit 254. The contacting member 458 comprises a first contacting part 462 and a second contacting part 464. The first contacting part 462 and the second contacting part 464 are disposed apart along the left-right direction. The first contacting part 462 and the second contacting part 464 are disposed separately. A shape of the first contacting part 462 is in a symmetric relationship with a shape of the second contacting part 464 with respect to a plane perpendicularly intersecting the left-right direction. The first contacting part 462 and the second contacting part 464 are supported by the base members 478, 480 so as to be pivotable about pivot axes 466, 468 (see
The push rod 482 comprises front push rods 492, 496, rear push rods 494, 498, rod guides 500, 502. first compression springs 504, 506, and second compression springs 508, 510, The rod guides 500, 502 are fixed to the base members 478, 480. The front push rods 492, 496 are inserted into the rod guides 500, 502. from behind, and protrude frontward than front ends of the rod guides 500, 502. A front end of the front push rod 492 is disposed behind the first contacting part 462 and facing a rear surface of the first contacting part 462. A front end of the front push rod 496 is disposed behind the second contacting part 464 and facing a rear surface of the second contacting part 464. The front push rods 492., 496 are configured to move in the front-rear direction with respect to the main body 204 by being guided by the rod guides 500, 502. The rear push rods 494, 498 are inserted into the rod guides 500, 502 from behind. The rear push rod 494 is disposed behind the front push rod 492 and facing the front push rod 492, and the rear push rod 498 is disposed behind the front push rod 496 and facing the front push rod 496. The rear push rods 494, 498 are configured to move in the front-rear direction with respect to the main body 204 by being guided by the rod guides 500, 502. The first compression springs 504, 506 and the second compression springs 508, 510 are accommodated inside the rod guides 500, 502. The first compression springs 504, 506 couple the front push rods 492, 496 with the rear push rods 494, 498. The first compression springs 504, 506 cause an elastic restoration force to be applied when intervals between the front push rods 492, 496 and the rear push rods 494, 498 are decreased. The second compression springs 508, 510 bias the front push rods 492, 496 rearward with respect to the rod guides 500, 502. Spring stiffness of the second compression springs 508, 510 is smaller than spring stiffness of the first compression springs 504, 506. As Shown in
As shown in
As shown in
When the push plate 476 moves frontward with respect to the main body 204, the rear ends of the rear push rods 494, 498 shown in FIG. .29 enter the recesses 514, 516 of the push plate 476. From this state, when the push plate 476 further moves frontward, the rear push rods 494, 498 are pushed in frontward, and the front push rods 492, 496 are pushed out frontward via the first compression springs 504, 506 shown in FIG, 30. Due to this, the first contacting part 462 and the second contacting part 464 pivot frontward in the opening direction, and are pressed against the rebus R.
As shown in
The magnetic sensors 474a, 474h and the controller 2.20 are electrically connected by seventh connecting cables 475 (see
Next, the tying operation of the rebar tying tool 202 will be described. The rebar tying tool 202 is configured to perform the tying operation when the trigger 212 is operated by the operator. Upon When the rebar tying tool 202 performs the tying operation, a feed-out process, a tip end. retaining process, a pullback process, a trailing end retaining process, a cutting process, a tensioning process, a twisting process, and a returning process are executed.
(Feed-Out Process)
From the initial state of the rebar tying tool 202, when the feeding motor 256 shown in
(Tip End Retaining Process)
After completion of the feed-out process, when the twisting motor 322 shown in
(Pullback Process)
After completion of the tip end retaining process, when the feeding motor 256 shown in
(Trailing End Retaining Process)
After completion of the pullback process, when the twisting motor 322 shown in
(Cutting Process)
After completion of the trailing end retaining process, when the twisting motor 322 shown in
(Tensioning Process)
After completion of the cutting process, When the twisting motor 322 shown in
from the retaining position of the wire W retained by the right clamp 348, the left clamp 350, and the clamp shaft 346. As a result, the wire W wrapped around the rebars R is thereby pulled. In the present embodiment, the contacting position CP moves frontward with respect to the main body 204.
(Twisting Process)
After completion of the tensioning process, when the twisting motor 322 shown in
(Returning Process)
After completion of the twisting process, when the twisting motor 322 shown in
In the present embodiment, the rebar tying tool 202 further comprises: the accommodating part main body 222 disposed downward than the twisting unit 254, wherein the rear surface 222a is disposed on the accommodating part main body 222; the battery receptacle 208 disposed downward than the grip 206 and configured to accommodate the controller 220; and the first connecting cable 240 that electrically connects the indicator 234 and the controller 220. As shown in
The feeding unit 250 comprises the feeding motor 256. The rebar tying tool 202 further comprises the second connecting cable 266 that electrically connects the feeding motor 256 and the controller 220. The feeding unit 250 is disposed downward than the twisting unit 254. The second connecting cable 266 extends from the feeding motor 256 to the battery receptacle 208 via the coupler 209. In the above configuration, the second connecting cable 266 extending from the feeding motor 256 to the battery receptacle 208 can be arranged without extending it through the twisting unit 254. Thus, the second connecting cable 266 can be suppressed from interfering with the twisting unit 254.
The rebar tying tool 202 further comprises: the magnetic sensor 242a configured to detect a rotation of the reel 232 around which the wire W is wound; and the third connecting cable 244 that electrically connects the magnetic sensor 242a and the controller 220. The magnetic sensor 242a is disposed downward than the twisting unit 254. As shown in
In the present embodiment, the rebar tying tool 202 is configured to tie the rebars R with the wire W. The rebar tying tool 202 comprises: the feeding unit 250 configured to feed the wire W around the rebars R; the twisting unit 254 configured to retain and twist the wire W around the rebars R; the main body 204 configured to accommodate the feeding unit 250 and the twisting unit 254; arid the contacting member 458 disposed in front of the twisting unit 254 and configured to come into contact with the rebars R upon a tying operation. The contacting position GP at Which the contacting member 458 comes into contact with the rebars R and the retaining position at which the twisting unit 254 retains the wire W are configured to move relative to each other in directions separating away from one another in the state where the twisting unit 254 is retaining the wire W In the above configuration, in the state where the twisting unit 254 is retaining the wire W, the wire W is pulled when the contacting position CP and the retaining position move relative to each other in the directions separating away from one another. As a result, the wire W can be suppressed from being twisted in a state where the wire W is loosened. Due to this, tying force of the wire W on the rebars R can be increased.
In the state where the twisting unit 254 is retaining the wire W, the contacting position CP is configured to move frontward with respect to the main body 204. In the above configuration, by moving the contacting position CP frontward with respect to the main body 204, the contacting position CP and the retaining position can be moved relative to each other in directions separating away from one another.
The rebar tying tool 202 further comprises the pushing part 460 configured to push the contacting member 458 frontward with respect to the main body 204. In the above configuration, by pushing the contacting member 458 frontward with respect to the main body 204 using the pushing part 460. the contacting position CP and the retaining position can be moved relative to each other in directions separating away from one another.
As shown in
The pushing part 460 further comprises the push plate 476 disposed facing the rear push rods 494, 498 behind the rear push rods 494, 498 and configured to move in the front-rear direction with respect to the main body 204. The push plate 476 is configured to move frontward with respect to the main body 204 following a motion of the twisting unit 254. In the above configuration, the rear push rods 494, 498 move frontward with respect to the main body 204 by the push plate 476 pushing the rear push rods 494, 498 frontward. Due to this, the contacting member 458 can be pushed frontward with respect to the main body 204 following the motion of the twisting unit 254.
As shown in
As shown in
The contacting member 458 is supported by the main body 204 pivotably about the pivot axes 466, 468. The rebar tying tool 202 further comprises the torsion springs 470, 472 configured to bias the contacting member 458 with respect to the main body 204 such that the contacting member 458 pivots rearward in a dosing direction with respect to the main body 204 when the contacting member 458 pivoted frontward in an opening direction with respect to the main body 204. In the above configuration, even when the contacting member 458 pivoted frontward in the opening direction, biasing force by the torsion springs 470, 472 is applied to the contacting member 458, and the contacting member 458 can thereby be returned to a state of being closed rearward,
The contacting member 458 comprises: the first contacting part 462 supported by the main body 204 pivotably about the pivot axis 466; and the second contacting part 464 disposed separately from the first contacting part 462 and supported by the main body 204 pivotably about the pivot axis 468. Since the first contacting part 462 and the second contacting part 464 are disposed separately, a load applied from the rebars R to the contacting member 458 can be distributed.
(Corresponding Relationship)
The rear surface 222a is an example of “facing surface”, the accommodating part main body 222 is an example of “facing part”, the battery receptacle 208 is an example of “second accommodating part”, and the magnetic sensor 242a is an example of “detecting sensor”, The front push rods 492, 496 are examples of “first push rod”, the rear push rods 494, 498 are examples of “second push rod”, the first compression springs 504, 506 are examples of “compression spring”, the torsion springs 470, 472 are examples of “biasing member”, the pivot axis 466 is an example of “first pivot axis”, and the pivot axis 468 is an example of “second pivot axis”.
Specific examples of the present invention has been described in detail, however, these are mere exemplary indications and thus do not limit the scope of the claims. The art described in the claims include modifications and variations of the specific examples presented above,
The contacting member 66 according to an aspect may be supported by the main body 4 so as to be movable along the front-rear direction.
The indicator 34 and the adjusting unit 36 according to an aspect may be disposed. traversing over the first rear surface 24a and the second rear surface 24b of the accommodating part main body 18, or may be disposed only on the first rear surface 24a.
The rear surface 24 of the accommodating part main body 18 according to an aspect may comprise a portion that does not overlap with the grip 6 on each of the left and right sides of the grip 6 as the rebar tying tool 2 is viewed from behind.
The rear surface 24 of the accommodating part main body 18 according to an aspect may have the first rear surface 24a that does not overlap with the grip 6 and the second rear surface 24b overlapped with the grip 6 as the rebar tying tool 2 is viewed from behind. In this case, the indicator 34 and the adjusting unit 36 may be disposed traversing over the first rear surface 24a and the second rear surface 24h and be disposed closer toward the first rear surface 24a. Further, the indicator 34 and the adjusting unit 36 may be disposed only on the first rear surface 24a.
The indicator 34 and the adjusting unit 36 according to an aspect may be disposed on the right side surface of the grip 6.
The rebar tying tool 2 according to an aspect may comprise the feeding unit 40 and a pullback unit that are separate from one another. In this case, the pullback unit comprises a motor different from the feeding motor 48.
The contacting member 66 according to an aspect may be composed of an elastic material.
hi this case, when the rebars R come into contact with the contacting member 66, the contacting position between the contacting member 66 and the rebars R moves rearward as the contacting member 66 elastically deforms.
The rebar tying tool 2 according to an aspect may further comprise a second elastic member having a smaller elastic coefficient than the elastic member 68. In this case, the elastic member 68 and the second elastic member may be arranged side by side with each other in the front-rear direction and be interposed between the rear surface of the bent part 76 of the contacting member 66 and the protruding piece 102 of the right main body 4b. Further, the elastic member 68 and the second elastic member may be interposed between the rear surface of the bent part 76 and the protruding piece 102 in a state of being disposed apart from one another in the left-right direction. In the tying operation of the wire W on the rebars R, when the wire W is pulled back from the rebars R, the contacting member 66 may pivot by the second elastic member contracting (elastically deforming), and when the wire W is twisted, the contacting member 66 may pivot by the elastic member 68 contracting (elastically deforming).
The contacting member 66 according to an aspect may come into contact with the rebars
R only at one point.
The front end 80a of the first contacting part 70 and the front end 90a of the second contacting part 72 according to an aspect may not curve in the directions separating away from one another, and may extend linearly frontward.
The first contacting part 70 and the second contacting part 72 according to an aspect may not be coupled., When the contacting member 66 comes into contact with the rebars R, the first contacting part 70 and the second contacting part 72 move independently.
The protrusion 302 according to an aspect may be disposed on the cam part 290. In this case, the recess 292 may be defined in the fixing member 300.
Technical features described in the description and the drawings may technically be useful alone or in various combinations, and are not limited to the combinations as originally claimed. Further, the art described in the description and the drawings may concurrently achieve a plurality of aims, and technical significance thereof resides in achieving any one of such aims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2019-153560 | Aug 2019 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2020/031173 | 8/18/2020 | WO |
