JP2020023831A - Reinforcement binding machine - Google Patents

Abstract

To provide a reinforcement binding machine in which a reel and a wheel integrally rotates, the reinforcement binding machine capable of preventing excessive load from being applied to an actuator which pulls a wire from the reel.SOLUTION: The description of the present application discloses a reinforcement binding machine. The reinforcement binding machine may comprise a reel having a wire, a wheel retaining the reel and being integrally rotatable with the reel, a wheel retaining unit that rotatably retains the wheel, and an elastic body interposed between the wheel and the wheel retaining unit. The description of the present application also discloses another reinforcement binding machine. The reinforcement binding machine may comprise a reel having a wire, a wheel retaining the reel and being integrally rotatable with the reel, and a wheel retaining unit that rotatably retains the wheel. The wheel may be movably configured relative to the wheel retaining unit.SELECTED DRAWING: Figure 6

Description

  The technology disclosed in the present specification relates to a reinforcing bar binding machine.

  Patent Literature 1 discloses a reinforcing bar binding machine. The rebar tying machine includes a reel having a wire, a wheel that holds the reel, and is rotatable integrally with the reel, and a wheel holding unit that rotatably holds the wheel.

JP 2018-111960 A

  In the technique of Patent Literature 1, when the reel is pressed against the wheel, the reel and the wheel engage to rotate the reel and the wheel integrally. In such a configuration, when the reel is excessively pressed against the wheel for some reason, resistance when rotating the reel or the wheel increases. At this time, an excessive load may be applied to the actuator that pulls out the wire from the reel. The present specification provides a technique capable of smoothly rotating a reel in a reinforcing bar binding machine in which a reel and a wheel rotate integrally. Also, there is provided a technique capable of suppressing an excessive load from being applied to an actuator that pulls out a wire from a reel.

  This specification discloses a rebar tying machine. The rebar tying machine includes a reel having a wire, a wheel that holds the reel and is rotatable integrally with the reel, a wheel holding unit that rotatably holds the wheel, a wheel and the wheel holding unit. And an elastic body interposed therebetween.

  According to the above configuration, even when the reel is excessively pressed against the wheel for some reason, an excessive pressing force acting on the reel or the wheel by the elastic body is suppressed. As a result, it is possible to suppress an increase in resistance when rotating the reel or the wheel. Further, it is possible to suppress an excessive load from being applied to the actuator that pulls out the wire from the reel.

  The present specification also discloses another rebar tying machine. The rebar tying machine may include a reel having a wire, a wheel that holds the reel and is rotatable integrally with the reel, and a wheel holding unit that rotatably holds the wheel. The wheel may be configured to be movable with respect to the wheel holding unit.

  According to the above configuration, even when the reel is excessively pressed against the wheel for some reason, the wheel is moved relative to the wheel holding portion, so that excessive pressing force is suppressed from acting on the reel or the wheel. . It is possible to suppress an increase in resistance when rotating the reel or the wheel. Further, it is possible to suppress an excessive load from being applied to the actuator that pulls out the wire from the reel.

It is the perspective view which looked at the reinforcing bar binding machine 2 concerning an example from upper left rear. It is the perspective view which looked at the reinforcing bar binding machine 2 which concerns on an Example from upper right rear. It is the perspective view which looked at the internal structure of the binding machine main body 4 of the rebar binding machine 2 which concerns on an Example from upper right rear. It is the perspective view which looked at the internal structure of the binding machine main body 4 of the reinforcing bar binding machine 2 which concerns on an Example from upper left front. It is the perspective view which looked at the reel accommodation room 20 of the rebar bundling machine 2 which concerns on an Example from upper left rear. It is sectional drawing of the accommodation mechanism 36 of the rebar tying machine 2 which concerns on an Example. It is the perspective view which looked at the wire reel WR, the turntable 60, and the magnetic sensor 66 of the rebar binding machine 2 which concerns on an Example from upper right rear. It is the perspective view which looked at the wire reel WR of the reinforcing bar binding machine 2 which concerns on an Example from upper right rear. It is the perspective view which looked at turntable 60 of rebar tying machine 2 concerning an example from the upper left rear. FIG. 7 is a cross-sectional view of the wire reel WR and the turntable 60 in a state where the engagement protrusion 60c of the turntable 60 has ridden on the partition wall WRd of the wire reel WR in the rebar binding machine 2 according to the embodiment. FIG. 6 is a cross-sectional view of the wire reel WR and the turntable 60 in a state where the engagement protrusion 60c of the turntable 60 has entered the opening WRe of the wire reel WR in the rebar tying machine 2 according to the embodiment. FIG. 13 is a cross-sectional view of the wire reel WR and the turntable 60 in a state where the engagement protrusion 60c of the turntable 60 has ridden on the partition wall WRd of the wire reel WR in the rebar binding machine 102 of the comparative example. It is the perspective view which looked at the wire reel WR, the turntable 60, and the optical sensor 90 of the rebar binding machine 2 which concerns on a modification from upper right rear.

  In one or more embodiments, a rebar tying machine includes a reel having a wire, a wheel that holds the reel and is rotatable integrally with the reel, and a wheel holder that rotatably holds the wheel. And an elastic body interposed between the wheel and the wheel holding portion.

  According to the above configuration, even when the reel is excessively pressed against the wheel for some reason, an excessive pressing force acting on the reel or the wheel by the elastic body is suppressed. As a result, it is possible to suppress an increase in resistance when rotating the reel or the wheel. Further, it is possible to suppress an excessive load from being applied to the actuator that pulls out the wire from the reel.

  In one or more embodiments, the reel may include an opening defined by a partition wall. The wheel may include an engagement projection that enters the opening and abuts the partition wall in a direction in which the reel rotates.

  As described above, in the configuration in which the partition wall of the reel and the engagement protrusion of the wheel abut in the direction in which the reel rotates, the reel and the wheel can be surely rotated integrally. However, with such a configuration, when the reel is mounted on the wheel, the engaging protrusion may not run into the opening but may ride on the partition wall. When the engaging projections ride on the partition wall, the reel is excessively pressed against the wheel as compared with the case where the engaging projections enter the opening. According to the above configuration, since the elastic body is interposed between the wheel and the wheel holding portion, even when the engagement protrusion runs on the partition wall, excessive pressing force is applied to the reel or the wheel by the elastic body. Acting is suppressed. As a result, it is possible to suppress an increase in resistance when rotating the reel or the wheel. Further, it is possible to suppress an excessive load from being applied to the actuator that pulls out the wire from the reel.

  In one or more embodiments, the elastic body may be a compression spring.

  According to the above configuration, when the reel is excessively pressed against the wheel, an excessive pressing force acting on the reel or the wheel can be effectively suppressed.

  In one or more embodiments, the rebar tying machine may further include a pressing mechanism for pressing the reel against the wheel.

  According to the above configuration, even when the reel is excessively pressed against the wheel by the pressing mechanism, the elastic body interposed between the wheel and the wheel holding portion suppresses the excessive pressing force from acting on the reel or the wheel. You. As a result, it is possible to suppress an increase in resistance when rotating the reel or the wheel. Further, it is possible to suppress an excessive load from being applied to the actuator that pulls out the wire from the reel.

  In one or more embodiments, the rebar tying machine may further include a rotation detection mechanism that detects rotation of the wheel with respect to the wheel holding unit.

  When the rotation of the reel is to be detected using the rotation detection mechanism as described above, it is necessary to surely rotate the reel and the wheel integrally. However, if the reel is strongly pressed against the wheel so that the reel and the wheel rotate integrally, the reel may be excessively pressed against the wheel. According to the above configuration, even when the reel is excessively pressed against the wheel, the elastic body interposed between the wheel and the wheel holding portion suppresses an excessive pressing force from acting on the reel or the wheel. As a result, it is possible to suppress an increase in resistance when rotating the reel or the wheel. Further, it is possible to suppress an excessive load from being applied to the actuator that pulls out the wire from the reel.

  In one or more embodiments, a rebar tying machine includes a reel having a wire, a wheel that holds the reel and is rotatable integrally with the reel, and a wheel holder that rotatably holds the wheel. And may be provided. The wheel may be configured to be movable with respect to the wheel holding unit.

  According to the above configuration, even when the reel is excessively pressed against the wheel for some reason, the wheel is moved relative to the wheel holding portion, so that excessive pressing force is suppressed from acting on the reel or the wheel. . It is possible to suppress an increase in resistance when rotating the reel or the wheel. Further, it is possible to suppress an excessive load from being applied to the actuator that pulls out the wire from the reel.

  In one or more embodiments, the wheel may be movable relative to the wheel holder in a direction along the axis of rotation of the reel, and in a direction orthogonal to the axis of rotation of the reel. It may not be able to move.

  When the wheel is moved with respect to the wheel holding portion, thereby causing the rotation axis of the wheel to be displaced from the rotation axis of the reel, resistance when rotating the reel and the wheel integrally increases, and the wire is pulled out from the reel. An excessive load is applied to the actuator. According to the above configuration, even when the wheel is moved with respect to the wheel holding unit, the rotation axis of the wheel does not shift from the rotation axis of the reel. Can be suppressed from increasing. Further, it is possible to suppress an excessive load from being applied to the actuator that pulls out the wire from the reel.

(Example)
A rebar tying machine 2 according to an embodiment will be described with reference to the drawings. The reinforcing bar binding machine 2 shown in FIG. 1 is an electric tool for binding a plurality of reinforcing bars R with wires W.

  As shown in FIGS. 1 and 2, the reinforcing bar binding machine 2 is provided on a binding machine main body 4 and a lower portion of the binding machine main body 4, and is provided on a grip 6 that can be gripped by a user and a lower portion of the grip 6. The battery mounting part 8 is provided. A battery B is detachable from the lower part of the battery mounting part 8. The battery B is a slide-type battery that is detachable by sliding with respect to the battery mounting unit 8. The battery B is, for example, a lithium ion battery that can be charged by a charger (not shown). When the battery B is attached to the battery attachment unit 8, power is supplied from the battery B to the reinforcing bar binding machine 2.

  The reinforcing bar binding machine 2 includes a housing 12. The housing 12 includes a left housing 14, a right housing 16, and a side cover housing 18. As shown in FIG. 1, the outer shape of the left half of the binding machine main body 4, the outer shape of the left half of the grip 6, and the outer shape of the left half of the battery mounting portion 8 are integrally formed on the left housing 14. Is formed. As shown in FIG. 2, the right housing 16 has a part of the outer shape of the right half of the binding machine main body 4, the outer shape of the right half of the grip 6, and the outer shape of the right half of the battery mounting part 8. It is formed integrally. The left housing 14 is fixed to the right housing 16 by a plurality of screws. A part of the outer shape of the right half of the binding machine body 4 is formed in the side cover housing 18. The side cover housing 18 is fixed to the right housing 16 with a plurality of screws.

  A reel accommodating chamber 20 for accommodating a wire reel WR (see FIG. 3 and the like) around which the wire W is wound is formed behind the binding machine main body 4. The upper part of the reel accommodating chamber 20 is covered by a reel cover 22. The reel cover 22 is rotatably held by the binding machine main body 4 via annular attachment portions 22a and 22b provided on the left and right. The reel cover 20 opens and closes the reel accommodating chamber 20 by rotating with respect to the binding machine main body 4 about the left-right direction as a rotation axis.

  A trigger 28 that can be pulled by the user and a trigger lock 30 that is disposed behind the trigger 28 and that can be switched between a state in which the pull operation of the trigger 28 is permitted and a state in which the trigger operation is prohibited are provided at the upper front of the grip 6. Is provided.

  As shown in FIGS. 3 and 4, the binding machine body 4 mainly includes a control board 34, a housing mechanism 36, a feed mechanism 38, a brake mechanism 40, a guide mechanism 42, a cutting mechanism 44, and a torsion. A mechanism 46 is provided. The control board 34 is arranged below the binding machine main body 4.

  The accommodation mechanism 36 is arranged at the rear of the binding machine main body 4. The accommodation mechanism 36 detachably holds the wire reel WR accommodated in the reel accommodation chamber 20. The wire reel WR is rotatably supported by the accommodation mechanism 36 in the reel accommodation room 20.

  The feed mechanism 38 is disposed at an upper portion near the center in the front-rear direction of the binding machine main body 4. The feed mechanism 38 rotates the feed roller 74 by driving the feed motor 72, pulls out the wire W from the wire reel WR of the storage mechanism 36, and sends out the wire W to the guide mechanism 42 in front of the binding machine main body 4. The operation of the feed motor 72 is controlled by the control board 34.

  The guide mechanism 42 is arranged at the front of the binding machine main body 4. The guide mechanism 42 guides the wire W sent from the feed mechanism 38 around the plurality of reinforcing bars R in an annular shape (see FIG. 1).

  The brake mechanism 40 is disposed near the center of the binding machine body 4 in the front-rear direction. The brake mechanism 40 stops the rotation of the wire reel WR at the timing when the feed mechanism 38 stops sending out the wire W. Notches WRa are formed at predetermined angular intervals on the wire reel WR, and the brake mechanism 40 controls the rotation of the wire reel WR by engaging the brake member 78 with the notch WRa by driving the solenoid 76. Stop. The operation of the solenoid 76 is controlled by the control board 34.

  The cutting mechanism 44 is arranged at the front of the binding machine main body 4. The cutting mechanism 44 cuts the wire W by a cutter (not shown) that rotates in conjunction with the torsion mechanism 46 in a state where the wire W is wound around the plurality of rebars R.

  The torsion mechanism 46 is arranged from the front part of the binding machine main body 4 to the middle part in the front-rear direction. The torsion mechanism 46 includes a hook 82 that moves forward and backward and rotates in conjunction with the rotation of the torsion motor 80. The torsion mechanism 46 binds the plurality of rebars R with the wires W by gripping and twisting the wires W wound around the plurality of rebars R with the hooks 82. The operation of the torsional motor 80 is controlled by the control board 34.

  As shown in FIG. 1, when the user sets the rebar tying machine 2 on the plurality of rebars R and pulls the trigger 28, the rebar tying machine 2 is moved by the feed mechanism 38, the brake mechanism 40, and the guide mechanism 42. A series of operations of winding the wire W around the plurality of rebars R and cutting the wire W by the cutting mechanism 44 and the torsion mechanism 46 to twist the wire W wound around the plurality of rebars R are executed. I do.

  Hereinafter, the accommodation mechanism 36 will be described in detail. As shown in FIGS. 5 and 6, the accommodation mechanism 36 includes a left support mechanism 48 provided on the left side of the reel accommodation room 20 and a right support mechanism 50 provided on the right side of the reel accommodation room 20.

  As shown in FIG. 6, the left support mechanism 48 includes a base member 52, a cam member 54, a shaft member 56, and a compression spring 58. The base member 52 is fixed to the left housing 14 by a plurality of screws. The cam member 54 is disposed so as to penetrate the base member 52, and is held by the base member 52 so as to be slidable in the left-right direction. The cam member 54 includes a cylindrical cover holding portion 54a that protrudes outside the reel housing chamber 20. The cover holding portion 54a holds the mounting portion 22a of the reel cover 22. The mounting portion 22b of the reel cover 22 is slidably held by a cylindrical cover holding portion 18a formed on the side cover housing 18. As shown in FIG. 5, a cam projection 54b is formed on the outer peripheral surface of the cover holding portion 54a. A cam projection (not shown) is formed on the inner peripheral surface of the mounting section 22a of the reel cover 22 in correspondence with the cam projection 54b of the cover holding section 54a. As shown in FIG. 6, the shaft member 56 includes a cylindrical reel holding portion 56a protruding inside the reel housing chamber 20. The shaft member 56 is fixed to the cam member 54 by a plurality of screws. For this reason, the shaft member 56 can slide in the left-right direction with respect to the base member 52 integrally with the cam member 54. Further, the shaft member 56 is urged rightward (that is, inside the reel accommodating chamber 20) by the compression spring 58 held by the base member 52. Normally, the cam member 54 and the shaft member 56 are moved to the right side (that is, inside the reel accommodating chamber 20) with respect to the base member 52 by the urging force of the compression spring 58. In this state, the reel holding portion 56a enters the shaft receiving groove WRb of the wire reel WR, and the cam protrusion 54b of the cam member 54 presses the cam protrusion of the mounting portion 22a in the direction in which the reel cover 22 closes, so that the reel cover 22 is closed. Is closed. At this time, since the reel holding portion 56a slidably abuts on the shaft receiving groove WRb, the wire reel WR is rotatably held on the reel holding portion 56a. In this state, the wire reel WR is pressed rightward (that is, inside the reel housing chamber 20) by the reel holding portion 56a. In this state, when the user opens the reel cover 22 against the urging force of the compression spring 58, the cam projection of the mounting portion 22a of the reel cover 22 is rotated by the rotation of the reel cover 22, and the cam of the cover holding portion 54a is rotated. The protrusion 54b is pressed leftward (ie, outside the reel housing chamber 20). As a result, the cam member 54 and the shaft member 56 move to the left with respect to the base member 52 (that is, outside the reel housing chamber 20), and the reel holding portion 56a comes out of the shaft receiving groove WRb of the wire reel WR. In this state, the user can take the wire reel WR in and out of the reel housing chamber 20.

  As shown in FIG. 6, the right support mechanism 50 includes a turntable 60, an inner bearing 62, an outer bearing 64, a magnetic sensor 66 (see FIG. 3), and a compression spring 68. The turntable 60 is rotatably held by the right housing 16 via an inner bearing 62 and an outer bearing 64. The turntable 60 is slidable left and right with respect to the inner bearing 62 and the outer bearing 64. The turntable 60 is urged leftward (that is, inside the reel accommodating chamber 20) by a compression spring 68 held by an outer bearing 64. Normally, the rotary table 60 is moved to the left with respect to the right housing 16 (that is, inside the reel housing chamber 20) by the urging force of the compression spring 68.

  The turntable 60 includes a cylindrical reel holding unit 60 a protruding inside the reel housing chamber 20, a disk-shaped rotation detecting unit 60 b disposed along the inner side surface of the reel housing chamber 20, A plurality of substantially triangular flat plate-shaped engaging projections 60c (see FIG. 9) protruding inward are provided. As shown in FIG. 8, the wire reel WR has a shaft receiving groove WRc formed near the rotation axis and a radially outer side of the shaft receiving groove WRc, and is circumferentially separated by a partition wall WRd. A plurality of openings WRe are formed. The reel holding portion 60a enters the shaft receiving groove WRc of the wire reel WR and slidably contacts the shaft receiving groove WRc. Further, the engagement protrusion 60c enters the opening WRe of the wire reel WR. When the wire reel WR rotates, the static friction force from the shaft receiving groove WRc acts on the reel holding portion 60a, and the engaging projection 60c abuts on the partition wall WRd in the circumferential direction, so that the turntable 60 also contacts the wire reel WR. They rotate together. As shown in FIG. 7, a plurality of magnets 60d are attached to the rotation detecting unit 60b at predetermined angular intervals. The magnetic sensor 66 includes a Hall IC 66a that detects magnetism from the magnet 60d. As shown in FIG. 3, the magnetic sensor 66 is disposed outside the right housing 16. The magnetic sensor 66 is electrically connected to the control board 34. When the wire reel WR rotates, the magnet 60d of the turntable 60 rotates integrally with the wire reel WR, and the magnetism detected by the Hall IC 66a fluctuates. The control board 34 can detect the rotation of the wire reel WR from a change in magnetism from the magnet 60d detected by the Hall IC 66a of the magnetic sensor 66.

  As shown in FIG. 10, when the wire reel WR is set in the housing mechanism 36, the tip of the engagement protrusion 60c may not get into the opening WRe but ride on the partition wall WRd. In this case, the compression spring 68 is compressed, and the turntable 60 moves rightward (ie, outside the reel housing chamber 20). In this state, the reel holding portion 60a is not in contact with the shaft receiving groove WRc, the engagement protrusion 60c is not in the opening WRe, and the tip of the engagement protrusion 60c is in contact with the tip of the partition wall WRd. . At this time, although the wire reel WR is pressed toward the turntable 60 of the right support mechanism 50 by the shaft member 56 of the left support mechanism 48, the compression spring 68 compresses and the turntable 60 moves rightward. Therefore, a large pressing force does not act on the wire reel WR or the turntable 60. Therefore, when the feed mechanism 38 draws the wire W from the wire reel WR by driving the feed motor 72, the wire reel WR is easily rotated with respect to the turntable 60. Accordingly, when the feed mechanism 38 pulls out the wire W from the wire reel WR by driving the feed motor 72, the engaging projection 60c enters the opening WRe, and the reel holding portion 60a is inserted into the shaft receiving groove WRc, as shown in FIG. As a result, the wire reel WR can be brought into a normally held state.

  FIG. 12 shows a comparative example in which the compression spring 68 is not provided, and the turntable 60 is not slidable left and right with respect to the inner bearing 62 and the outer bearing 64 (that is, the turntable 60 is attached to the right housing 16). (It is not movable in the left-right direction.) In the rebar tying machine 102, when the tip of the engagement protrusion 60c does not enter the opening WRe and runs on the partition wall WRd, the wire reel WR is rotated by the shaft member 56 of the left support mechanism 48 to rotate the right support mechanism 50. Since the wire reel WR and the turntable 60 are pressed toward the table 60, a very large pressing force acts on the wire reel WR and the turntable 60. In this state, even if the feed mechanism 38 tries to pull out the wire W from the wire reel WR by driving the feed motor 72, the wire reel WR cannot easily rotate with respect to the turntable 60, and the turntable 60 On the other hand, since it is not easy to rotate, a very large load is applied to the feed motor 72. On the other hand, according to the rebar tying machine 2 of the present embodiment shown in FIGS. 10 and 11, the turntable 60 can move in the left-right direction with respect to the right housing 16. Since the compression spring 68 is provided therebetween, it is possible to prevent a large load from being applied to the feed motor 72 even when the engagement protrusion 60c runs over the partition wall WRd.

  In the above embodiment, in order to detect the rotation of the wire reel WR, the accommodation mechanism 36 includes a plurality of magnets 60 d provided on the turntable 60 and a magnetic sensor 66 provided on the right housing 16. Was explained. Alternatively, a configuration in which a plurality of magnets are directly attached to the wire reel WR at predetermined angular intervals and the magnet 60d is not attached to the turntable 60 may be adopted. Even in this case, the rotation of the wire reel WR can be detected from the fluctuation of the magnetism of the wire reel WR detected by the magnetic sensor 66. When it is not necessary to detect the rotation of the wire reel WR, a plurality of magnets may not be provided on the wire reel WR or the turntable 60, and the magnetic sensor 66 may not be provided on the right housing 16.

  In the above embodiment, in order to detect the rotation of the wire reel WR, the accommodation mechanism 36 includes a plurality of magnets 60 d provided on the turntable 60 and a magnetic sensor 66 provided on the right housing 16. Was explained. On the other hand, for example, as shown in FIG. 13, in order to detect the rotation of the wire reel WR, the housing mechanism 36 is provided on the plurality of reflectors 60 e provided on the turntable 60 and the right housing 16. A configuration including the optical sensor 90 may be adopted. In the configuration illustrated in FIG. 13, the optical sensor 90 includes a light emitting unit 90a that emits a laser for detection toward the wire reel WR, and a light receiving unit 90b that receives the laser reflected by the reflector 60e. The light emitting section 90a and the light receiving section 90b of the optical sensor 90 are electrically connected to the control board 34, respectively. A plurality of reflectors 60e are attached to the rotation detector 60b of the turntable 60 at predetermined angular intervals. The optical sensor 90 is arranged outside the right housing 16. A through hole (not shown) is formed in the right housing 16 so that the light emitting section 90a and the light receiving section 90b of the optical sensor 90 are exposed to the wire reel WR. According to the configuration shown in FIG. 13, the control board 34 can detect the rotation of the wire reel WR from a change in the light detected by the light receiving unit 90b of the optical sensor 90.

  In the above embodiment, the configuration in which the wire reel WR is held at the rear part of the binding machine main body 4 has been described, but the wire reel WR may be held at a position other than this. For example, the wire reel WR and the accommodation mechanism 36 for holding the wire reel WR are disposed below the binding machine main body 4 and in front of the grip 6, for example, between the guide mechanism 42 and the battery mounting section 8. The feed mechanism 38 and the brake mechanism 40 may be disposed above the storage mechanism 36.

  In the above embodiment, the configuration in which the reinforcing bar binding machine 2 uses one wire reel WR has been described, but the reinforcing bar binding machine 2 may be configured to use two or more wire reels WR. For example, the rebar tying machine 2 includes a plurality of storage mechanisms 36, a plurality of feed mechanisms 38, and a plurality of brake mechanisms 40. The plurality of wire reels WR are separately held, and a wire is transferred from each wire reel WR to the guide mechanism 42. W may be sent out.

  As described above, in one or more embodiments, the reinforcing bar binding machine 2 holds the wire reel WR (an example of a reel) having the wire W and the wire reel WR, and rotates integrally with the wire reel WR. A turntable 60 (example of a wheel), a right housing 16 (example of a wheel holding unit) that rotatably holds the turntable 60, and a compression spring 68 (elasticity) interposed between the turntable 60 and the right housing 16 Body example).

  According to the above configuration, even when the wire reel WR is excessively pressed against the turntable 60 for some reason, the compression spring 68 suppresses an excessive pressing force from acting on the wire reel WR and the turntable 60. Thereby, it is possible to suppress an increase in resistance when rotating the wire reel WR and the turntable 60. In addition, it is possible to suppress an excessive load from being applied to the feed motor 72 which is an actuator that pulls out the wire W from the wire reel WR.

  In one or more embodiments, the wire reel WR includes an opening WRe defined by a partition wall WRd. The turntable 60 includes an engagement protrusion 60c that enters the opening WRe and comes into contact with the partition wall WRd in the direction in which the wire reel WR rotates.

  As described above, in the configuration in which the partition wall WRd of the wire reel WR abuts on the engagement protrusion 60c of the turntable 60 in the direction in which the wire reel WR rotates, the wire reel WR and the turntable 60 are reliably rotated integrally. be able to. However, in the case of such a configuration, when the wire reel WR is attached to the turntable 60, the engaging protrusion 60c may ride on the partition wall WRd without entering the opening WRe. When the engagement protrusion 60c runs over the partition wall WRd, the wire reel WR is excessively pressed against the turntable 60 as compared with the case where the engagement protrusion 60c enters the opening WRe. According to the above configuration, since the compression spring 68 is interposed between the turntable 60 and the right housing 16, even when the engagement protrusion 60c runs on the partition wall WRd, the wire reel WR is formed by the compression spring 68. And the excessive pressing force acting on the rotary table 60 is suppressed. Thereby, it is possible to suppress an increase in resistance when rotating the wire reel WR and the turntable 60. Further, it is possible to suppress an excessive load from being applied to the feed motor 72 that pulls out the wire W from the wire reel WR.

  In one or more embodiments, the elastic interposed between the turntable 60 and the right housing 16 is a compression spring 68.

  According to the above configuration, when the wire reel WR is excessively pressed against the turntable 60, it is possible to effectively suppress an excessive pressing force from acting on the wire reel WR and the turntable 60.

  In one or more embodiments, the reinforcing bar binding machine 2 further includes a left support mechanism 48 (an example of a pressing mechanism) that presses the wire reel WR against the turntable 60.

  According to the above configuration, even when the wire reel WR is excessively pressed against the turntable 60 by the left support mechanism 48, the compression spring 68 interposed between the turntable 60 and the right housing 16 allows the wire reel WR and the turntable to be rotated. Excessive pressing force acting on 60 is suppressed. Thereby, it is possible to suppress an increase in resistance when rotating the wire reel WR and the turntable 60. Further, it is possible to suppress an excessive load from being applied to the feed motor 72 that pulls out the wire W from the wire reel WR.

  In one or more embodiments, the rebar tying machine 2 includes a rotation detection mechanism (for example, a combination of a magnet 60d and a magnetic sensor 66, or a reflection plate 60e and an optical sensor) for detecting rotation of the turntable 60 with respect to the right housing 16. (Combination of sensors 90).

  When the rotation of the wire reel WR is to be detected using the rotation detection mechanism as described above, it is necessary to reliably rotate the wire reel WR and the turntable 60 integrally. However, if the wire reel WR is configured to be strongly pressed against the turntable 60 so that the wire reel WR and the turntable 60 rotate integrally, the wire reel WR may be excessively pressed against the turntable 60. is there. According to the above-described configuration, even when the wire reel WR is excessively pressed against the turntable 60, the compression spring 68 interposed between the turntable 60 and the right housing 16 excessively pushes the wire reel WR and the turntable 60. The action of pressure is suppressed. Thereby, it is possible to suppress an increase in resistance when rotating the wire reel WR and the turntable 60. Further, it is possible to suppress an excessive load from being applied to the feed motor 72 that pulls out the wire W from the wire reel WR.

  In one or more embodiments, the rebar tying machine 2 includes a wire reel WR (an example of a reel) having a wire W and a turntable 60 that holds the wire reel WR and can rotate integrally with the wire reel WR. (An example of a wheel) and a right housing 16 (an example of a wheel holding portion) that rotatably holds the turntable 60. The turntable 60 is configured to be movable with respect to the right housing 16.

  According to the above configuration, even when the wire reel WR is excessively pressed against the turntable 60 for some reason, the turntable 60 moves with respect to the right housing 16 so that the wire reel WR and the turntable 60 are not excessively pressed. The operation of the pressing force is suppressed. An increase in resistance when rotating the wire reel WR or the turntable 60 can be suppressed. In addition, it is possible to suppress an excessive load from being applied to the feed motor 72 which is an actuator that pulls out the wire W from the wire reel WR.

  In one or more embodiments, the turntable 60 is movable relative to the right housing 16 in a direction along the axis of rotation of the wire reel WR and in a direction orthogonal to the axis of rotation of the wire reel WR. It is impossible.

  When the turntable 60 is moved with respect to the right housing 16 and thereby the rotation axis of the turntable 60 is displaced from the rotation axis of the wire reel WR, when the wire reel WR and the turntable 60 are integrally rotated. The resistance increases, and an excessive load is applied to the feed motor 72 that pulls out the wire W from the wire reel WR. According to the above configuration, even when the turntable 60 is moved with respect to the right housing 16, the rotation axis of the turntable 60 does not shift from the rotation axis of the wire reel WR. It is possible to suppress an increase in resistance when rotating the turntable 60 integrally. Further, it is possible to suppress an excessive load from being applied to the feed motor 72 that pulls out the wire W from the wire reel WR.

  As described above, specific examples of the present invention have been described in detail, but these are merely examples, and do not limit the scope of the claims. The technology described in the claims includes various modifications and alterations of the specific examples illustrated above. The technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings can simultaneously achieve a plurality of objects, and has technical utility by achieving one of the objects.

2: Reinforcing bar binding machine 4: Binding machine main body 6: Grip 8: Battery mounting section 12: Housing 14: Left housing 16: Right housing 18: Side cover housing 18a: Cover holding section 20: Reel storage chamber 22: Reel cover 22a: Attachment section 22b: Attachment section 28: Trigger 30: Trigger lock 34: Control board 36: Housing mechanism 38: Feed mechanism 40: Brake mechanism 42: Guide mechanism 44: Cutting mechanism 46: Torsion mechanism 48: Left support mechanism 50: Right support Mechanism 52: Base member 54: Cam member 54a: Cover holding portion 54b: Cam protrusion 56: Shaft member 56a: Reel holding portion 58: Compression spring 60: Rotating table 60a: Reel holding portion 60b: Rotation detecting portion 60c: Engagement protrusion 60d: magnet 60e: reflector 62: inner bearing 64: outer Bearing 66: magnetic sensor 66a: Hall IC
68: compression spring 72: feed motor 74: feed roller 76: solenoid 78: brake member 80: torsion motor 82: hook 90: optical sensor 90a: light emitting section 90b: light receiving section 102: reinforcing bar binding machine

Claims (7)

A reel having a wire;
A wheel that holds the reel and is rotatable integrally with the reel;
A wheel holding unit that rotatably holds the wheel,
A reinforcing bar binding machine comprising: the wheel and an elastic body interposed between the wheel holding unit. The reel includes an opening defined by a partition wall,
The rebar tying machine according to claim 1, wherein the wheel includes an engaging projection that enters the opening and abuts the partition wall in a direction in which the reel rotates.   The reinforcing bar binding machine according to claim 1, wherein the elastic body is a compression spring.   The reinforcing bar binding machine according to any one of claims 1 to 3, further comprising a pressing mechanism that presses the reel against the wheel.   The reinforcing bar binding machine according to any one of claims 1 to 4, further comprising a rotation detection mechanism that detects rotation of the wheel with respect to the wheel holding unit. A reel having a wire;
A wheel that holds the reel and is rotatable integrally with the reel;
A wheel holding unit that rotatably holds the wheel,
The rebar tying machine, wherein the wheel is configured to be movable with respect to the wheel holding unit.   The rebar binding machine according to claim 6, wherein the wheel is movable with respect to the wheel holding unit in a direction along a rotation axis of the reel, and is not movable in a direction orthogonal to the rotation axis of the reel.

Images