JP2018111504A - Binding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology to keep an actuator from being affected by foreign materials with a simple mechanism.SOLUTION: A binding device, disclosed in this specification, comprises a reel with a binding wire wound thereon, a braking member that is engaged with the reel for braking, and an actuator to drive the braking member. The braking member is located to partition between the reel and the actuator.SELECTED DRAWING: Figure 25

Description

  The technology disclosed in this specification relates to a binding machine.

  Patent Document 1 discloses a binding machine. The binding machine includes a reel on which a binding wire is wound, a brake member that engages with the reel and applies a brake, and an actuator that drives the brake member.

JP 2010-1731 A

  The binding machine of Patent Document 1 requires a complicated mechanism so that foreign matter does not enter the space in which the actuator is accommodated from the space in which the reel is accommodated. A technique that can prevent the actuator from being affected by foreign matter with a simple configuration is expected.

  The present specification discloses a binding machine. The binding machine includes a reel on which a binding wire is wound, a brake member that engages with the reel and applies a brake, and an actuator that drives the brake member. The brake member is disposed so as to block between the reel and the actuator.

  According to said structure, since a brake member plays the role of the partition wall which interrupts | blocks between a reel and an actuator, it can prevent that an actuator receives the influence of a foreign material with a simple structure.

It is the perspective view which looked at the reinforcing bar binding machine 2 which concerns on an Example from upper left back. It is the perspective view which looked at the reinforcing bar binding machine 2 which concerns on an Example from the upper right back. It is the perspective view which looked at the reinforcing bar binding machine 2 which concerns on an Example from the lower left back. It is the perspective view which looked at the internal structure of the upper part of the grip 6 of the reinforcing bar binding machine 2 according to the embodiment from the lower left rear. In rebar binding machine 2 concerning an example, it is the perspective view which looked at trigger 28 and trigger lock 30 from the upper right back in case trigger lock 30 exists in a permission position. In rebar binding machine 2 concerning an example, it is the perspective view which looked at trigger 28 and trigger lock 30 from the upper right back in case trigger lock 30 exists in a prohibition position. 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 the upper right back. 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 the upper left front. It is the perspective view which looked at the reel storage chamber 20 of the reinforcing bar binding machine 2 which concerns on an Example from upper left back. It is sectional drawing of the accommodation mechanism 36 of the reinforcing bar binding 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 reinforcing bar binding machine 2 according to the embodiment from the upper right rear. It is the perspective view which looked at the reel storage chamber 20 of the reinforcing bar binding machine 2 which concerns on an Example from upper left back, Comprising: It is the figure which showed the vicinity of the drain hole 20a in the cross section. It is the perspective view which looked at the feed mechanism 38 of the reinforcing bar binding machine 2 according to the embodiment from the upper right rear. It is the perspective view which looked at the guide member 68, the cover member 70, the feed motor 72, the speed reduction mechanism 74, the bearing 76, and the main drive gear 78 of the reinforcing bar binding machine 2 according to the embodiment from the upper right rear. It is sectional drawing of the cover member 70, the feed motor 72, the deceleration mechanism 74, the bearing 76, and the main drive gear 78 of the reinforcing bar binding machine 2 which concerns on an Example. It is the perspective view which looked at the guide member 68 of the reinforcing bar binding machine 2 which concerns on an Example from upper left back. It is the perspective view which looked at the release lever 82 and the lock lever 86 of the reinforcing bar binding machine 2 according to the embodiment from the upper left front. It is the perspective view which looked at the upper side curl guide 90 of the reinforcing bar binding machine 2 which concerns on an Example from upper left back. It is the perspective view which looked at the upper side curl guide 90 of the reinforcing bar binding machine 2 which concerns on an Example from the upper right back. It is the perspective view which looked at the internal structure of the 1st guide path 94 of the upper side curl guide 90 of the reinforcing bar binding machine 2 concerning an Example, and the internal structure of the binding machine main body 4 from upper left back. It is the perspective view which looked at the internal structure of the 2nd guide channel 96 of the upper side curl guide 90 of the reinforcing bar binding machine 2 concerning an Example, and the internal structure of the binding machine main body 4 from upper left back. In the reinforcing bar binding machine 2 according to the embodiment, when the lower curl guide 92 is closed, the internal structure of the binding machine body 4 is a perspective view as viewed from the lower right front. In the reinforcing bar binding machine 2 according to the embodiment, it is a perspective view of the internal structure of the binding machine body 4 as viewed from the lower right front when the lower curl guide 92 is open. FIG. 6 is a perspective view of the wire reel WR and the brake mechanism 40 as viewed from the upper right rear when the solenoid 146 is not energized in the reinforcing bar binding machine 2 according to the embodiment. FIG. 6 is a perspective view of the wire reel WR and the brake mechanism 40 as viewed from the upper right rear when the solenoid 146 is energized in the reinforcing bar binding machine 2 according to the embodiment. It is the perspective view which looked at the twist mechanism 46 of the reinforcing bar binding machine 2 which concerns on an Example from the upper left front. It is the side view which looked at the reinforcing bar binding machine 2 which concerns on an Example from the left. It is the perspective view which looked at the wire reel WR, the turntable 60, and the optical sensor 194 of the reinforcing bar binding machine 2 according to the modification from the upper right rear. It is the side view which looked at the state where the magnetic sensor 66 was attached to the right housing 16 of the reinforcing bar binding machine 2 which concerns on an Example from the right. It is the side view which looked at the state before the magnetic sensor 66 was attached to the right housing 16 of the reinforcing bar binding machine 2 which concerns on an Example from the right. FIG. 30 is a cross-sectional view of the right housing 16, the turntable 60, and the magnetic sensor 66 of the reinforcing bar binding machine 2 according to the embodiment as seen along the line XXXI-XXXI in FIG. 29. It is sectional drawing which looked at the XXXII-XXXII line | wire of FIG. 29 about the right housing 16, the turntable 60, and the magnetic sensor 66 of the reinforcing bar binding machine 2 which concerns on an Example. It is sectional drawing seen from the XXXIII-XXXIII line | wire of FIG. 29 about the right housing 16, the side cover housing 18, the turntable 60, and the magnetic sensor 66 of the reinforcing bar binding machine 2 which concerns on an Example.

  In one or more embodiments, the binding machine may include a reel on which the binding wire is wound, a brake member that engages and applies a brake to the reel, and an actuator that drives the brake member. The brake member may be disposed so as to block between the reel and the actuator.

  According to said structure, since a brake member plays the role of the partition wall which interrupts | blocks between a reel and an actuator, it can prevent that an actuator receives the influence of a foreign material with a simple structure.

  In one or more embodiments, the brake member may be arranged to block between the reel and the actuator with only the brake member.

  According to the above configuration, since it is not necessary to provide a partition wall for blocking between the reel and the actuator in the housing of the binding machine, the reel and the actuator can be arranged close to each other, and the binding machine can be further downsized. it can.

  In one or more embodiments, the actuator may comprise a solenoid, the solenoid being arranged so that the longitudinal direction is substantially parallel to the tangential direction of rotational movement at a location closest to the reel solenoid. May be.

  When the actuator is a solenoid, if the solenoid is arranged so that the longitudinal direction is substantially parallel to the tangential direction of the rotational movement at the position closest to the solenoid of the reel, the solenoid can be arranged close to the reel, Although the binding machine can be further reduced in size, a wide range of the solenoid faces the reel, and the solenoid is easily affected by foreign matter. According to said structure, since the brake member is arrange | positioned so that between a reel and an actuator may be arrange | positioned, a binding machine can be reduced in size, preventing that an actuator receives the influence of a foreign material.

  In one or more embodiments, the brake member may include a rib that protrudes toward the reel or actuator.

  According to said structure, durability of a brake member can be improved.

  In one or more embodiments, the brake member is a single member that includes a drive arm coupled to the actuator and a brake arm that engages the reel and is pivotable about a pivot axis. Alternatively, the brake arm may be engaged with the reel by driving the drive arm by the actuator and applying a torque around the swing shaft to the brake member.

  According to said structure, the mechanism for an actuator to drive a brake member can be simplified.

  In one or more embodiments, the binding machine may further include a reel storage chamber that stores the reel, and the reel storage chamber may include a drain hole.

  According to said structure, even when water flows into a reel storage chamber, it can drain from a reel storage chamber via a drain hole.

  In one or more embodiments, the drain holes may be formed in a labyrinth structure.

  According to said structure, since the drain hole has a labyrinth structure, it can prevent that a foreign material penetrate | invades into the inside of a reel storage chamber through a drain hole.

  In one or more embodiments, the drain hole may be arranged at a position where the inside of the reel housing chamber cannot be seen from the rear of the binding machine.

  According to said structure, since the drain hole is arrange | positioned in the position which cannot be seen from the back of a binding machine, it can prevent that the rotating reel is exposed with respect to the user who is behind the binding machine. User safety can be further increased.

(Example)
A reinforcing bar binding machine 2 according to an embodiment will be described with reference to the drawings. A 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 at a binding machine body 4, a lower part of the binding machine body 4, a grip 6 that can be gripped by a user, and a lower part of the grip 6. A battery mounting portion 8 is provided. A battery B can be attached to and detached from the lower portion of the battery mounting portion 8. The battery B is a slidable battery that is detachable by sliding with respect to the battery mounting portion 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 portion 8, power is supplied from the battery B to the reinforcing bar binding machine 2. As shown in FIG. 3, a battery terminal 10 that is electrically connected to the battery B is provided on the lower surface of the battery mounting portion 8. The battery terminal 10 is electrically connected to a control board 200 (see FIG. 8) housed in the lower part of the binding machine body 4. The control board 200 controls various operations of the reinforcing bar binding machine 2.

  As shown in FIGS. 1 and 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. The left housing 14, the right housing 16, and the side cover housing 18 are all made of resin. The left housing 14, the right housing 16, and the side cover housing 18 can be referred to as a plurality of housing plates constituting the housing 12. As shown in FIG. 1, the left housing 14 integrally includes an outer shape of the left half of the binding machine body 4, an outer shape of the left half of the grip 6, and an outer shape of the left half of the battery mounting portion 8. 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 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 portion 8. It is integrally formed. 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 by a plurality of screws. A reel accommodating chamber 20 for accommodating the wire reel WR (see FIG. 7) is formed behind the binding machine body 4. The reel housing chamber 20 is covered with a reel cover 22 from above. The reel cover 22 is held by the binding machine body 4 via annular mounting portions 22a and 22b provided on the left and right sides, and is rotated with respect to the binding machine body 4 with the left-right direction as a rotation axis. Then, the reel housing chamber 20 is opened and closed.

  As shown in FIG. 1, a first operation display unit 24 is provided in the upper left portion of the binding machine body 4 near the center in the front-rear direction. The first operation display unit 24 includes a main switch for switching on / off the power source of the reinforcing bar binding machine 2, a main power LED for displaying the power on / off state of the reinforcing bar binding machine 2, and the like. The first operation display unit 24 is electrically connected to the control board 200. The first operation display unit 24 is arranged so that the operation display surface is inclined from the upper right to the lower left when the binding machine body 4 is viewed from the rear. By arranging the first operation display unit 24 in such an inclined manner, the user of the reinforcing bar binding machine 2 can perform the first operation regardless of whether the binding machine body 4 is viewed from the left side or the upper side. The display part 24 can be visually recognized satisfactorily. Further, since the first operation display unit 24 is arranged so as to be inclined in this manner, the binding machine main body is compared with the case where the first operation display unit 24 is arranged along the upper surface or the side surface of the binding machine main body 4. The dead space inside 4 can be reduced and the binding machine body 4 can be downsized.

  A second operation display unit 26 is provided on the front upper surface of the battery mounting unit 8. The second operation display unit 26 includes a setting button for setting the wire W feed amount, torsional strength, and the like, a 7-segment LED for displaying the contents set by the setting button, and the like. The second operation display unit 26 is electrically connected to the control board 200.

  A trigger 28 that can be pulled by the user, and a trigger lock 30 that is switchable between a state in which the pulling operation of the trigger 28 is permitted and a state in which the trigger 28 is prohibited are disposed in the upper front portion of the grip 6. Is provided. The trigger 28 is held by the left housing 14 and the right housing 16 so as to be slidable in the front-rear direction with respect to the grip 6. As shown in FIG. 4, the trigger 28 is urged forward by a compression spring 32 held by the left housing 14 and the right housing 16. A protrusion 28 a that protrudes rearward is formed at the rear lower portion of the trigger 28. A trigger switch 34 is disposed in the upper part inside the grip 6. The trigger switch 34 is electrically connected to the control board 200. When the user places a finger on the trigger 28 and pulls the trigger 28 against the urging force of the compression spring 32, the trigger 28 moves rearward, and the protrusion 28a presses the trigger switch 34. When the user lifts his / her finger from the trigger 28, the trigger 28 moves forward by the urging force of the compression spring 32, and the protruding portion 28 a is separated from the trigger switch 34.

  As shown in FIG. 5 and FIG. 6, the trigger lock 30 is formed on the rear surface near the center of the base 30a, the base 30a extending linearly in the left-right direction, the protrusion 30b protruding forward from the vicinity of the center of the base 30a. The engaging portion 30c is provided. As shown in FIGS. 1 and 2, the left end surface 30d and the right end surface 30e of the base 30a of the trigger lock 30 are disposed so as to be exposed on the left surface and the right surface of the grip 6, respectively. The trigger lock 30 is held by the left housing 14 and the right housing 16 so as to be slidable in the left-right direction with respect to the grip 6. The trigger lock 30 is movable between a permitted position that permits the pulling operation of the trigger 28 and a prohibited position that prohibits the pulling operation of the trigger 28. As shown in FIGS. 5 and 6, a recess 28 b that can receive the protruding portion 30 b and a stopper 28 c that prohibits the receiving of the protruding portion 30 b are formed at the upper rear of the trigger 28. As shown in FIG. 5, when the trigger lock 30 is in the permitted position, the left end surface 30 d of the trigger lock 30 protrudes outward from the left surface of the grip 6, and the engaging portion 30 c is formed on the left housing 14 and the right housing 16. It is engaged with the formed engaged portion (not shown). Further, when the trigger lock 30 is in the permitted position, the protrusion 30 b of the trigger lock 30 faces the recess 28 b of the trigger 28. In this state, when the trigger 28 moves rearward, the protruding portion 30b is received in the concave portion 28b, so that the trigger 28 can move rearward. That is, when the trigger lock 30 is in the permitted position, the user can pull the trigger 28. When the user presses the left end face 30d of the trigger lock 30 from the left side of the grip 6 from the state where the trigger lock 30 is in the permitted position, the engagement of the engagement portion 30c of the trigger lock 30 is released, and the trigger lock 30 is moved to the right. Slide in the direction and move to the prohibited position. As shown in FIG. 6, when the trigger lock 30 is in the prohibited position, the right end surface 30 e of the trigger lock 30 protrudes outward from the right surface of the grip 6, and the engaging portion 30 c is formed on the left housing 14 and the right housing 16. It is engaged with the formed engaged portion (not shown). Further, when the trigger lock 30 is in the prohibited position, the protrusion 30 b of the trigger lock 30 faces the stopper 28 c of the trigger 28. In this state, when the trigger 28 moves backward, the projecting portion 30b comes into contact with the stopper 28c, and the trigger 28 is prohibited from further moving backward. That is, when the trigger lock 30 is in the prohibited position, the pulling operation of the trigger 28 by the user is prohibited. When the user pushes the right end face 30e of the trigger lock 30 from the right side of the grip 6 from the state where the trigger lock 30 is in the prohibited position, the engagement of the engagement portion 30c of the trigger lock 30 is released, and the trigger lock 30 Slides to the left and moves to the permitted position. Since the reinforcing bar binding machine 2 of the present embodiment uses the slide type trigger lock 30 as described above, the mechanical configuration can be simplified as compared with the case where the rotary type trigger lock is used. The rebar binding machine 2 can be reduced in size.

  As shown in FIGS. 7 and 8, the binding machine body 4 mainly includes a storage mechanism 36, a feed mechanism 38, a brake mechanism 40, a guide mechanism 42, a cutting mechanism 44, a torsion mechanism 46, and a control. A substrate 200 is provided.

  As shown in FIG. 7, the accommodation mechanism 36 is disposed at the rear part of the binding machine body 4 and detachably holds the wire reel WR accommodated in the reel accommodation chamber 20. The wire reel WR is rotatably supported by the storage mechanism 36 in the reel storage chamber 20.

  As shown in FIGS. 9 and 10, the storage mechanism 36 includes a left support mechanism 48 provided on the left side of the reel storage chamber 20 and a right support mechanism 50 provided on the right side of the reel storage chamber 20.

  As shown in FIG. 10, 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 with a plurality of screws. As shown in FIG. 9, a tool storage groove 52 a that can store a tool used when a user performs maintenance of the reinforcing bar binding machine 2, such as a hexagon wrench HW, is formed on the upper surface of the base member 52. As shown in FIG. 10, 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 54 a that protrudes outside the reel housing chamber 20. The cover holding part 54 a holds the attachment part 22 a of the reel cover 22. Note that the mounting portion 22 b of the reel cover 22 is slidably held by a cylindrical cover holding portion 18 a formed on the side cover housing 18. As shown in FIG. 9, a cam projection 54b is formed on the outer peripheral surface of the cover holding portion 54a. Corresponding to the cam protrusion 54b of the cover holding portion 54a, a cam protrusion (not shown) is formed on the inner peripheral surface of the attachment portion 22a of the reel cover 22. As shown in FIG. 10, the shaft member 56 includes a cylindrical reel holding portion 56 a that protrudes 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 is integral with the cam member 54 and can slide in the left-right direction with respect to the base member 52. Further, the shaft member 56 is urged rightward (that is, toward the inside of the reel housing chamber 20) by a compression spring 58 held by the base member 52. Under normal conditions, the cam member 54 and the shaft member 56 are moved to the right side relative to the base member 52 (that is, inside the reel housing chamber 20) by the urging force of the compression spring 58. In this state, the reel holding portion 56a enters the shaft receiving groove WRa of the wire reel WR, and the cam projection 54b of the cam member 54 presses the cam projection of the mounting portion 22a in the direction in which the reel cover 22 closes, and the reel cover 22 Is closed. At this time, the reel holding portion 56a is slidable relative to the shaft receiving groove WRa, so that the wire reel WR is held rotatably with respect to the reel holding portion 56a. From 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 22 a of the reel cover 22 moves along with the cam of the cover holding portion 54 a as the reel cover 22 rotates. The protrusion 54b is pressed leftward (that is, outward of 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 WRa of the wire reel WR. In this state, the user can take in and out the wire reel WR from the reel accommodating chamber 20.

  As shown in FIG. 10, the right support mechanism 50 includes a turntable 60, an inner bearing 62, an outer bearing 64, and a magnetic sensor 66 (see FIG. 7). The turntable 60 is rotatably held by the right housing 16 via an inner bearing 62 and an outer bearing 64. The turntable 60 includes a cylindrical reel holding portion 60 a that protrudes to the inside of the reel housing chamber 20, and a disk-shaped rotation detection portion 60 b that is disposed along the inner surface of the reel housing chamber 20. The reel holding portion 60a is relatively non-rotatably engaged with the shaft receiving groove WRb of the wire reel WR. Therefore, when the wire reel WR rotates, the turntable 60 also rotates together with the wire reel WR. As shown in FIG. 11, a plurality of magnets 60c are attached to the rotation detector 60b at predetermined angular intervals. As shown in FIG. 7, the magnetic sensor 66 is disposed outside the right housing 16. The magnetic sensor 66 is electrically connected to the control board 200. As shown in FIGS. 29, 30, 31, and 32, the magnetic sensor 66 includes a Hall IC 66a and a through hole 66b. In the right housing 16, a pin 16 e that protrudes in a cylindrical shape from the outer surface of the right housing 16 at a position corresponding to the through hole 66 b of the magnetic sensor 66 and the magnetic sensor 66 are sandwiched from both sides at an interval narrower than the width of the magnetic sensor 66 A pair of sandwiching walls 16f arranged in this manner and a through hole 16g formed at a position corresponding to the Hall IC 66a of the magnetic sensor 66 are formed. The magnetic sensor 66 is fitted into the right housing 16 by inserting the pin 16e of the right housing 16 into the through hole 66b and press-fitting the magnetic sensor 66 between the pair of clamping walls 16f of the right housing 16. In a state where the magnetic sensor 66 is attached to the right housing 16, the magnetic sensor 66 is disposed at a position where the Hall IC 66 a faces the magnet 60 c through the through hole 16 g of the right housing 16. As shown in FIG. 33, when the side cover housing 18 is attached to the right housing 16, the magnetic sensor 66 is sandwiched between the right housing 16 and the side cover housing 18. When the wire reel WR rotates, the magnet 60c of the turntable 60 rotates integrally with the wire reel WR, and the magnetism detected by the Hall IC 66a changes. The control board 200 can detect the rotation of the wire reel WR from the magnetic fluctuation from the magnet 60c detected by the Hall IC 66a of the magnetic sensor 66. In the reinforcing bar binding machine 2 of the present embodiment, a magnetic sensor 66 is attached to the right housing 16 that rotatably holds the turntable 60 via an inner bearing 62 and an outer bearing 64. By setting it as such a structure, the magnet 60c and the magnetic sensor 66 which were attached to the turntable 60 can be positioned correctly.

  As shown in FIG. 3, a drain hole 20 a is formed in the lowermost part of the reel accommodating chamber 20. By forming the drain hole 20a, water can be discharged from the inside of the reel housing chamber 20 to the outside even when water enters the inside of the reel housing chamber 20. The drain hole 20a is disposed at a position where the inside of the reel housing chamber 20 cannot be seen from the rear of the reinforcing bar binding machine 2. Therefore, the rotating wire reel WR is not exposed to the body of the user behind the reinforcing bar binding machine 2, and the safety of the user can be ensured. As shown in FIG. 12, the drain hole 20a has a so-called labyrinth structure that cannot be seen from the outside of the reel housing chamber 20 by a partition wall 14a formed in the left housing 14. Yes. By setting it as such a structure, it can suppress that a foreign material penetrate | invades into the inside of the reel storage chamber 20 through the drain hole 20a.

  As shown in FIG. 7, the feed mechanism 38 is disposed at an upper portion near the center of the binding machine body 4 in the front-rear direction, and the wire W supplied from the wire reel WR of the housing mechanism 36 is transferred to the binding machine body 4. It sends out to the front guide mechanism 42. As shown in FIG. 13, the feed mechanism 38 includes a guide member 68, a cover member 70, a feed motor 72, a speed reduction mechanism 74, a bearing 76, a main driving gear 78, a driven gear 80, and a release lever 82. A compression spring 84 (see FIG. 17) and a lock lever 86 are provided. As shown in FIGS. 14 and 15, the cover member 70, the feed motor 72, the speed reduction mechanism 74, the bearing 76, and the main driving gear 78 are unitized, and the guide member 68 is screwed onto the cover member 70. It is attached to the right housing 16 and the side cover housing 18 in a fixed state. The cover member 70 is sandwiched between the right housing 16 and the side cover housing 18 via a cushion member 70a. Therefore, it is possible to prevent dust and the like from moving through the gap between the cover member 70 and the right housing 16 and the gap between the cover member 70 and the side cover housing 18.

  As shown in FIG. 15, a V-shaped groove 78 a extending in the radial direction at the center in the height direction is formed on the side surface of the main driving gear 78. As will be described later, the main driving gear 78 functions as a feed roller that feeds the wire W. The main driving gear 78 is connected to the feed motor 72 via the speed reduction mechanism 74. The feed motor 72 is a DC brush motor. The feed motor 72 is electrically connected to the control board 200. The control board 200 can control the operation of the feed motor 72. The speed reduction mechanism 74 includes a pair of spur gears 74a and a spur gear 74b. The spur gear 74 a is fixed to the output shaft 72 a of the feed motor 72. The spur gear 74b is fixed to the main driving gear 78 by screws. The cover member 70 is formed with a through hole through which the spar gear 74b and the main drive gear 78 pass. The spur gear 74 b and the main driving gear 78 constitute a rotation transmission mechanism that transmits the rotation of the feed motor 72 to the main driving gear 78 through the through hole of the cover member 70. The main driving gear 78 is rotatably held by the cover member 70 via a bearing 76. The bearing 76 is a dust-proof bearing, and includes a dust-proof cover 76 a that prevents dust from entering the bearing 76. The dust cover 76a may be a member integrated with the bearing 76 or may be a member different from the bearing 76. The speed reduction mechanism 74 is accommodated in the space inside the cover member 70. That is, the speed reduction mechanism 74 is disposed on the side of the feed motor 72 as viewed from the cover member 70, and the rotation of the feed motor 72 is reduced and transmitted to the main drive gear 78. In the reinforcing bar binding machine 2, when the main driving gear 78 sends out the wire W, dust due to wear of the wire W or the main driving gear 78 may occur. When this dust reaches the feed motor 72 and the speed reduction mechanism 74, the operation of the feed motor 72 and the speed reduction mechanism 74 may be affected. According to the reinforcing bar binding machine 2 of the present embodiment, the bearing 76 attached to the through hole of the cover member 70 suppresses the movement of dust from the main driving gear 78 side to the feed motor 72 side through the through hole. Function as. This can prevent the feed motor 72 and the speed reduction mechanism 74 from being affected by dust.

  As shown in FIG. 16, the guide member 68 includes an insertion hole 68 a that guides the wire W drawn from the wire reel WR toward the main driving gear 78 and the driven gear 80. The insertion hole 68a is formed in a shape obtained by obliquely cutting a cone having a large diameter on the inlet side and a small diameter on the outlet side. For this reason, the entrance of the insertion hole 68a of the guide member 68 is open toward both the upper side and the rear side. Since the entrance of the insertion hole 68a opens upward, that is, the entrance of the insertion hole 68a opens toward the side opposite to the cover member 70 side when viewed from the guide member 68, the reinforcing bar binding machine 2 When the user passes the wire W drawn from the wire reel WR through the insertion hole 68a, the tip of the wire W can be easily inserted into the insertion hole 68a. The guide member 68 has a retaining piece 68b. As shown in FIG. 14, when the guide member 68 is fixed to the cover member 70 with screws, the retaining pieces 68 b of the guide member 68 are arranged so as to partially cover the upper surface of the bearing 76. By providing the guide member 68 with the retaining piece 68 b, the guide member 68 can be used as a retaining member that prevents the bearing 76 from being detached from the cover member 70.

  As shown in FIG. 13, the driven gear 80 is rotatably supported by the gear arm 82 a of the release lever 82. On the side surface of the driven gear 80, a V-shaped groove 80a extending in the radial direction at the center in the height direction is formed. The release lever 82 is a substantially L-shaped member including a gear arm 82a and an operation arm 82b. The release lever 82 is swingably supported by the right housing 16 via a swing shaft 82c. As shown in FIG. 17, the operation arm 82 b of the release lever 82 is urged toward the left, that is, outward by the compression spring 84 held by the right housing 16. Under normal conditions, the biasing force of the compression spring 84 causes a torque in the direction in which the driven gear 80 approaches the main driving gear 78 due to the biasing force of the release lever 82, and the driven gear 80 is pressed against the main driving gear 78. As a result, the teeth on the side surface of the driven gear 80 and the teeth on the side surface of the main driving gear 78 are engaged, and the wire W is formed between the V-shaped groove 78a of the main driving gear 78 and the V-shaped groove 80a of the driven gear 80. It is pinched. In this state, when the feed motor 72 rotates the main driving gear 78, the driven gear 80 rotates in the reverse direction, and the wire W sandwiched between the main driving gear 78 and the driven gear 80 is sent out to the guide mechanism 42. The wire W is pulled out from the reel WR.

  As shown in FIG. 13, the lock lever 86 is a substantially L-shaped member including a lock arm 86a and a spring receiving arm 86b. The lock lever 86 is swingably supported by the right housing 16 via a swing shaft 86c. The spring receiving arm 86b of the lock lever 86 is urged to the right by a compression spring (not shown) held by the right housing 16. Due to the urging force of the compression spring, a torque is applied to the lock lever 86 in a direction that brings the lock arm 86a closer to the operation arm 82b of the release lever 82. As shown in FIG. 17, an engaging convex portion 86d is formed on the lock arm 86a of the locking lever 86, and an engaging concave portion 82d that engages with the engaging convex portion 86d is formed on the operation arm 82b of the release lever 82. Is formed.

  When the user of the reinforcing bar binding machine 2 pushes the operation arm 82 b against the urging force of the compression spring 84, the release lever 82 swings around the swing shaft 82 c and the driven gear 80 moves away from the main drive gear 78. To do. At this time, when the operation arm 82b is pushed to a position where the engagement recess 82d of the operation arm 82b faces the engagement protrusion 86d of the lock arm 86a, the lock lever 86 swings around the swing shaft 86c. The engaging projection 86d of the lock arm 86a engages with the engaging recess 82d of the operation arm 82b. Accordingly, the operation arm 82b is held in a pushed state. When setting the wire W extending from the wire reel WR to the feed mechanism 38, the user pushes the operating arm 82b to separate the driven gear 80 from the main driving gear 78, and in this state, the wire W drawn from the wire reel WR is removed. The tip is disposed between the main driving gear 78 and the driven gear 80 through the insertion hole 68 a of the guide member 68. When the user swings the lock arm 86a of the lock lever 86 in a direction away from the operation arm 82b against the biasing force of the compression spring, the engagement protrusion 86d of the lock arm 86a and the operation arm 82b are engaged. The engagement of the recess 82d is released, the release lever 82 swings around the swing shaft 82c by the biasing force of the compression spring 84, the driven gear 80 engages with the main drive gear 78, and the main drive gear 78 A wire W is sandwiched between the V-shaped groove 78 a and the V-shaped groove 80 a of the driven gear 80.

  As shown in FIG. 8, the guide mechanism 42 is arranged at the front portion of the binding machine body 4 and guides the wire W sent from the feed mechanism 38 in a ring shape around the plurality of reinforcing bars R (see FIG. 8). 1). As shown in FIGS. 7 and 8, the guide mechanism 42 includes a guide pipe 88, an upper curl guide 90, and a lower curl guide 92. As shown in FIG. 13, the rear end portion of the guide pipe 88 is opened between the main driving gear 78 and the driven gear 80 of the feed mechanism 38. The wire W sent from the feed mechanism 38 is fed into the guide pipe 88. As shown in FIG. 20, the front end portion of the guide pipe 88 opens toward the inside of the upper curl guide 90. The upper curl guide 90 has a first guide passage 94 (see FIG. 20) for guiding the wire W sent from the guide pipe 88, and a second guide for guiding the wire W sent from the lower curl guide 92. A passage 96 (see FIG. 21) is provided.

  As shown in FIGS. 18 and 19, the upper curl guide 90 includes a lead holder 98, a guide arm 100, a contact plate 102, a left guide plate 104, an inner guide plate 106, a right guide plate 108, and a guide. A member 110 (see FIG. 20) and a top plate 112 (see FIG. 20) are provided.

  The lead holder 98 has an opening on the front side of the guide pipe 88 that opens toward the first guide passage 94 formed by the guide member 110, the right guide plate 108, the inner guide plate 106, and the top plate 112. In addition, the guide pipe 88 is held. As shown in FIG. 20, the guide member 110 is a metal member, and a wire passage 110a through which the wire W passes is formed. A first guide pin 114 is disposed below the front end of the wire passage 110a. The first guide pin 114 is a metal member having high wear resistance such as tungsten, and is press-fitted into the right guide plate 108. The wire W fed out from the guide pipe 88 is guided toward the cutter 116 by the wire passage 110a and the first guide pin 114.

  The cutter 116 includes a fixing member 118 and a swing member 120. The fixing member 118 is a metal member having an outer shape that is cylindrical, and a wire passage 118a through which the wire W passes is formed. The fixing member 118 is fitted to the inner guide plate 106 and is sandwiched between the right guide plate 108 and the inner guide plate 106. The swing member 120 is a metal member in which a through hole 120a through which the fixing member 118 passes and a cutting piece 120b for cutting the wire W are formed. The inner guide plate 106 and the right guide are interposed via the fixing member 118. The plate 108 is swingably held. The cutting piece 120b cuts the wire W by shearing when the swinging member 120 swings. The top plate 112 is a metal member and is fixed to the right guide plate 108. The wire W that has passed through the cutter 116 is further guided downward by the protrusion 112a of the top plate 112 and the second guide pin 122. The second guide pin 122 is a highly wear-resistant metal member such as tungsten, and is press-fitted into the right guide plate 108. When the wire W passes through the first guide passage 94, the wire W is wound up by the upper surface inside the wire passage 110 a, the first guide pin 114, and the second guide pin 122, and toward the lower curl guide 92. Sent.

  The lower curl guide 92 is provided with a third guide passage 124 and a guard plate 126. The third guide passage 124 includes a left guide wall 124 a and a right guide wall 124 b that guide the wire W sent from the front end of the upper curl guide 90. The guard plate 126 is formed in a shape extending upward on both sides of the third guide passage 124 to prevent the plurality of reinforcing bars R from interfering with the torsion mechanism 46 and to allow foreign matter to enter the binding machine body 4. To prevent. In addition, the guard plate 126 prevents the wire W from moving from side to side when the twisting mechanism 46 twists the wire W wound in an annular shape. The wire W guided by the lower curl guide 92 is sent toward the second guide passage 96 of the upper curl guide 90.

  The wire W sent from the rear of the lower curl guide 92 to the rear of the upper curl guide 90 is sent to the second guide passage 96 formed by the guide arm 100, the left guide plate 104, and the inner guide plate 106. As shown in FIG. 21, an arcuate upper guide wall 100 a that guides the wire W is formed on the lower surface in front of the guide arm 100. The wire W sent from the lower curl guide 92 to the upper curl guide 90 is guided by the second guide passage 96 and sent again from the front of the upper curl guide 90 to the front of the lower curl guide 92.

  As shown in FIGS. 18 and 19, the contact plate 102 is a substantially U-shaped member and is disposed so as to straddle the lead holder 98 and the guide arm 100. The contact plate 102 includes a contact portion 102a, a swing shaft 102b, and a connecting portion 102c. The contact plate 102 is swingably supported by the lead holder 98 via the swing shaft 102b. The connecting portion 102 c of the contact plate 102 is urged upward by a compression spring 128 held by the lead holder 98. As shown in FIG. 19, the contact plate 102 includes a magnet arm 132 to which a magnet 130 is attached. As shown in FIG. 7, a magnetic sensor 134 is attached to the right housing 16 in front of the binding machine body 4. The magnetic sensor 134 is electrically connected to the control board 200. In normal times, the magnet 130 of the contact plate 102 is arranged at a position facing the magnetic sensor 134. When the user binds the reinforcing bar binding machine 2 to the plurality of reinforcing bars R, when the plurality of reinforcing bars R are pressed against the contact portion 102a, the contact plate 102 swings against the urging force of the compression spring 128, The magnet 130 of the magnet arm 132 is disposed at a position away from the magnetic sensor 134. The control board 200 can detect whether or not a plurality of reinforcing bars R are pressed against the contact portion 102a from the detection signal of the magnetic sensor 134.

  As shown in FIG. 19, the lead holder 98 has one attachment hole 98a. As shown in FIG. 18, the guide arm 100 has three attachment holes 100b, 100c, and 100d. The mounting hole 98a of the lead holder 98 and one mounting hole 100b of the guide arm 100 are arranged so as to overlap each other. As shown in FIG. 8, screw bosses 16 a, 16 b, and 16 c that are used when the left housing 14 is attached to the right housing 16 are formed in the right housing 16 in front of the binding machine body 4. In the upper curl guide 90, the mounting hole 98a of the lead holder 98 and the mounting hole 100b of the guide arm 100 are fitted to the screw boss 16a, and the screw boss 16b is fitted to the mounting hole 100c of the guide arm 100. By fitting the mounting hole 100 d of the guide arm 100, the guide arm 100 is attached to the right housing 16. By attaching the upper curl guide 90 to the right housing 16 using the screw bosses 16a, 16b and 16c used when attaching the left housing 14 to the right housing 16, the upper curl guide 90 can be moved to the right without increasing the number of parts. It can be attached to the housing 16. Further, the upper curl guide 90 can be accurately positioned with respect to the right housing 16. Further, the locations where the screw bosses 16a, 16b, and 16c are formed are relatively high in strength in the right housing 16, so that the load due to the collision with the plurality of reinforcing bars R is transmitted from the upper curl guide 90 to the right housing 16. Even in the case, high durability can be ensured. In addition, as long as the location which attaches the upper side curl guide 90 to the right housing 16 is two or more places, it may be what number. Of these, the number of locations where the upper curl guide 90 is attached using the screw boss used when attaching the left housing 14 to the right housing 16 may be one or two, or four or more locations. Good. By using two or more locations for attaching the upper curl guide 90 using the screw bosses, the upper curl guide 90 can be accurately positioned with respect to the right housing 16. Further, as the number of places where the upper curl guide 90 is attached using the screw bosses, higher durability can be ensured.

  As shown in FIG. 8, the lower curl guide 92 is supported by the left housing 14 and the right housing 16 via a swing shaft 92a so as to be swingable. The lower curl guide 92 can swing between a closed state shown in FIG. 22 and an open state shown in FIG. As shown in FIG. 8, the lower curl guide 92 is urged in the closing direction by a torsion spring 92b. When the user uses the reinforcing bar binding machine 2, the lower curl guide 92 is in a closed state. When the user uses the reinforcing bar binding machine 2 and the wire W is entangled with the torsion mechanism 46, the user opens the lower curl guide 92 against the urging force of the torsion spring 92b, thereby twisting the torsion mechanism 92. The wire W entangled with the mechanism 46 can be removed.

  As shown in FIGS. 22 and 23, an open / close detection mechanism 136 for detecting the open / close state of the lower curl guide 92 is provided at the front lower portion of the binding machine body 4. The open / close detection mechanism 136 is attached to the right housing 16. The open / close detection mechanism 136 includes an open / close detection member 138, a compression spring 140, and a magnetic sensor 142. The open / close detection member 138 includes a contact arm 138a and a magnet arm 138c. The open / close detection member 138 is swingably supported by the right housing 16 via a swing shaft 138b. Further, the open / close detection member 138 is urged in a swinging direction in which the contact arm 138a is directed upward by a compression spring 140 held by the right housing 16. A magnet 144 (see FIG. 23) is attached to the magnet arm 138c of the open / close detection member 138. The magnetic sensor 142 is fixed to the right housing 16. The magnetic sensor 142 is electrically connected to the control board 200. A contact portion 92 c that protrudes rearward is formed at the lower rear portion of the lower curl guide 92. As shown in FIG. 22, when the lower curl guide 92 is closed by the biasing force of the torsion spring 92b, the contact portion 92c of the lower curl guide 92 pushes down the contact arm 138a of the open / close detection member 138, and the magnet arm The magnet 144 of 138 c is disposed at a position facing the magnetic sensor 142. As shown in FIG. 23, when the user opens the lower curl guide 92 against the urging force of the torsion spring 92b, the contact portion 92c of the lower curl guide 92 separates from the contact arm 138a of the open / close detection member 138. . Accordingly, the open / close detection member 138 is swung by the urging force of the compression spring 140, and the magnet 144 of the magnet arm 138 c is disposed at a position away from the magnetic sensor 142. The control board 200 can detect the open / closed state of the lower curl guide 92 from the detection signal of the magnetic sensor 142. As shown in FIG. 23, the left housing 14 near the lower curl guide 92 is provided with a rigid stopper 180a extending from a metal side plate 180 attached to the left housing 14 and an elastic stopper 182. Yes. The elastic stopper 182 is made of an elastic material such as a urethane pin, a rubber pin, or an elastomer. 20 and 21, the right housing 16 near the lower curl guide 92 has a rigid stopper 184a extending from a metal side plate 184 attached to the right housing 16, and an elastic stopper 186. Is provided. The elastic stopper 186 is made of an elastic material such as a urethane pin, a rubber pin, or an elastomer. When the lower curl guide 92 is closed as shown in FIG. 22 from the state in which the lower curl guide 92 shown in FIG. 23 is opened, the lower curl guide 92 first comes into contact with the elastic stoppers 182 and 186. Then, it comes into contact with the rigid stoppers 180a and 184a. By adopting such a configuration, it is possible to suppress the generation of a loud collision sound even when the lower curl guide 92 is closed vigorously.

  As shown in FIG. 1, the upper curl guide 90 feeds the wire W from the front upper side to the lower side of the plurality of reinforcing bars R, and the lower curl guide 92 sends the wire W sent from the upper curl guide 90 to the rear of the plurality of reinforcing bars R. Send from below to above. Thereby, the wire W sent from the feeding mechanism 38 is wound around the plurality of reinforcing bars R in an annular shape. When the feed mechanism 38 feeds the wire W by the feed amount of the wire W set by the user, the feed mechanism 38 stops the feed motor 72 and stops sending the wire W.

  The brake mechanism 40 shown in FIG. 7 stops the rotation of the wire reel WR in conjunction with the feed mechanism 38 stopping the delivery of the wire W. As shown in FIGS. 24 and 25, the brake mechanism 40 includes a solenoid 146, a compression spring 148, and a brake member 150. The solenoid 146 is electrically connected to the control board 200. The control board 200 can control the operation of the solenoid 146. The brake member 150 is a single member including a drive arm 150a and a brake arm 150c. The brake member 150 is swingably attached to the right housing 16 via the swing shaft 150b. The drive arm 150a of the brake member 150 is connected to an output shaft of a solenoid 146 that moves forward and backward. The brake member 150 is urged by a compression spring 148 in a swinging direction in which the brake arm 150c is separated from the wire reel WR. The brake arm 150c of the brake member 150 includes a plate portion 150d formed in a wide plate shape, a tip rib 150e protruding toward the wire reel WR at the tip of the plate portion 150d, and a wire reel WR at both ends of the plate portion 150d. Side end ribs 150f projecting to the side are provided. On the wire reel WR, engaging portions WRc with which the tip ribs 150e of the brake arm 150c are engaged are formed at predetermined angular intervals in the circumferential direction. As shown in FIG. 24, in a state where the solenoid 146 is not energized, the brake arm 150c is separated from the engaging portion WRc of the wire reel WR by the urging force of the compression spring 148. As shown in FIG. 25, in a state where the solenoid 146 is energized, the solenoid 146 drives the drive arm 150a, and the torque around the swing shaft 150b acts on the brake member 150, so that the brake member 150 swings. The tip rib 150e of the brake arm 150c is engaged with the engaging portion WRc of the wire reel WR by swinging around the moving shaft 150b. When the feed mechanism 38 feeds the wire W, the control board 200 does not energize the solenoid 146 and separates the brake arm 150c from the engaging portion WRc of the wire reel WR. As a result, the wire reel WR can freely rotate, and the feed mechanism 38 can pull out the wire W from the wire reel WR. Further, when the feed mechanism 38 stops feeding the wire W, the control board 200 energizes the solenoid 146 to engage the brake arm 150c with the engaging portion WRc of the wire reel WR. Thereby, the rotation of the wire reel WR is prohibited. Thereby, even after the feeding mechanism 38 stops feeding the wire W, it is possible to prevent the wire W WR from continuing to rotate due to inertia and to loosen the wire W between the wire reel WR and the feeding mechanism 38. .

  As shown in FIG. 7, the brake mechanism 40 is disposed outside the right housing 16 and is accommodated in a space defined by the right housing 16 and the side cover housing 18. As shown in FIG. 9, the right housing 16 of the reel accommodating chamber 20 is formed with a brake opening 16d having a size substantially the same as the brake arm 150c of the brake member 150. With such a configuration, although there is a brake opening 16d between the wire reel WR and the solenoid 146, the gap is shielded by the plate portion 150d of the brake arm 150c. Accordingly, foreign matter can be prevented from moving from the inside of the reel accommodating chamber 20 to the solenoid 146 side via the brake opening 16d. The solenoid 146 can be prevented from being affected by foreign matter. As shown in FIG. 9, the brake arm 150c of the brake member 150 has a shape bent in the left-right direction so that the lower portion is offset to the left side of the upper portion. With such a configuration, the solenoid 146 can be disposed at a position offset to the right side with respect to the engaging portion WRc of the wire reel WR. In the reinforcing bar binding machine 2 of the present embodiment, a torsion motor 170 of a torsion mechanism 46 described later is disposed in front of the wire reel WR. According to the above configuration, the binding machine body 4 can be downsized by arranging the torsion motor 170 and the solenoid 146 of the torsion mechanism 46 side by side in the left-right direction.

  As shown in FIGS. 24 and 25, the solenoid 146 is arranged so that its longitudinal direction is substantially parallel to the tangential direction of the rotational movement at the location closest to the solenoid 146 of the wire reel WR. The solenoid 146 is arranged so that its longitudinal direction is substantially parallel to the axis of the feed motor 72. With such a configuration, as shown in FIG. 7, the solenoid between the wire reel WR and the feed motor 72 even when the wire reel WR and the feed motor 72 are arranged close to each other in the front-rear direction of the binding machine body 4. 146 can be arranged, and the binding machine body 4 can be downsized. In addition, since the solenoid 146 is interposed between the wire reel WR and the feed motor 72, a certain amount of space can be secured between the guide member 68 provided above the feed motor 72 and the wire reel WR. If the distance between the guide member 68 and the wire reel WR is too narrow, it will be difficult for the user to pass the wire W drawn from the wire reel WR through the insertion hole 68a of the guide member 68. According to the configuration of this embodiment, even when the wire reel WR and the feed motor 72 are arranged close to each other, a certain amount of space is ensured between the guide member 68 provided above the feed motor 72 and the wire reel WR. It is possible to improve the workability of the user.

  In the reinforcing bar binding machine 2, the partition wall between the solenoid 146 and the wire reel WR is not provided on the right housing 16 or the side cover housing 18, and the space between the solenoid 146 and the wire reel WR is shielded only by the brake member 150. You may comprise. In this case, the solenoid 146 and the wire reel WR can be arranged closer to each other, and the binding machine body 4 can be further downsized.

  In the reinforcing bar binding machine 2 of the present embodiment, the brake arm 150c of the brake member 150 includes a plate portion 150d formed in a wide plate shape, a tip rib 150e protruding toward the wire reel WR at the tip of the plate portion 150d, Side end ribs 150f projecting toward the wire reel WR are provided at both ends of the plate portion 150d. By setting it as such a structure, the intensity | strength of the brake arm 150c can be raised and durability of the brake member 150 can be improved. The side end rib 150f may be formed so as to protrude toward the solenoid 146 side.

  As shown in FIG. 8, the cutting mechanism 44 is disposed at the front portion of the binding machine body 4 and cuts the wire W in a state where the wire W is wound around the plurality of reinforcing bars R. As shown in FIGS. 18, 19, and 20, the cutting mechanism 44 is unitized with the upper curl guide 90 of the guide mechanism 42. The cutting mechanism 44 includes a push plate 152, a pull plate 154, a first link arm 156, a second link arm 158, and a cutter 116. The push plate 152, the pull plate 154, and the first link arm 156 are connected to each other through a swing shaft 160 so as to be swingable. Further, the push plate 152 and the pull plate 154 are supported by the guide arm 100 via a swing shaft 162 so as to be swingable. The first link arm 156 is biased forward by a torsion spring 164. As shown in FIG. 20, the first link arm 156 and the second link arm 158 are connected to each other via a swing shaft 166 so as to be swingable. The second link arm 158 is connected to the swing member 120 of the cutter 116 via the swing shaft 168 so as to be swingable.

  When the lower portion of the push plate 152 is pushed forward by the operation of the torsion mechanism 46 described later, the first link arm 156 and the second link arm 158 move rearward, whereby the swing member 120 of the cutter 116 is moved. It swings around the fixed member 118. As a result, the wire W is cut at the front end of the wire passage 118 a of the fixing member 118 by shearing by the cutting piece 120 b of the swing member 120. From this state, when the lower portion of the pull plate 154 is pushed rearward by the operation of the torsion mechanism 46, the first link arm 156 and the second link arm 158 move forward, so that the swing member of the cutter 116 is moved. 120 swings around the fixing member 118, and the cutter 116 returns to the initial state.

  The torsion mechanism 46 shown in FIG. 8 is arranged from the front part of the binding machine body 4 to the middle part in the front-rear direction, and twists the wires W wound around the plurality of reinforcing bars R, so that the plurality of reinforcing bars R are twisted. Are bound with a wire W. As shown in FIG. 26, the torsion mechanism 46 includes a torsion motor 170, a speed reduction mechanism 172, a sleeve 174, a screw shaft (not shown) disposed inside the sleeve 174, a pusher 176, and a pair of hooks 178. ing.

  The torsion motor 170 is a direct current brushless motor. The torsion motor 170 is electrically connected to the control board 200. The control board 200 can control the operation of the torsion motor 170. The rotation of the torsion motor 170 is transmitted to the screw shaft via the speed reduction mechanism 172. The torsion motor 170 can rotate in the forward and reverse directions, and the screw shaft can also rotate in the forward and reverse directions accordingly. The sleeve 174 is disposed so as to cover the periphery of the screw shaft. In a state where the rotation of the sleeve 174 is prohibited, when the screw shaft rotates in the forward direction, the sleeve 174 moves forward, and when the screw shaft rotates in the reverse direction, the sleeve 174 moves backward. Further, when the screw shaft rotates while the sleeve 174 is allowed to rotate, the sleeve 174 rotates together with the screw shaft. The pusher 176 moves forward when the sleeve 174 moves forward, and moves backward when the sleeve 174 moves backward. When the sleeve 174 advances from the initial position to a predetermined position, the pusher 176 presses the lower part of the push plate 152 of the cutting mechanism 44 forward, so that the swinging member 120 of the cutter 116 swings around the fixed member 118. Move. Conversely, when the sleeve 174 moves backward from the advanced position to a predetermined position, the pusher 176 presses the lower portion of the pull plate 154 of the cutting mechanism 44 toward the rear, so that the swinging member 120 of the cutter 116 is fixed to the fixing member 118. Rocks around. The pair of hooks 178 are provided at the front end of the sleeve 174 and open and close according to the position of the sleeve 174 in the front-rear direction. When the sleeve 174 moves forward, the pair of hooks 178 close and the wire W is gripped. Conversely, when the sleeve 174 moves backward, the pair of hooks 178 open and the wire W is released.

  The control board 200 rotates the torsion motor 170 in a state where the wire W is wound around the plurality of reinforcing bars R. At this time, the rotation of the sleeve 174 is prohibited, and the rotation of the screw shaft advances the sleeve 174 and advances the pusher 176 and the pair of hooks 178. The cutting mechanism 44 cuts the wire W and the pair of hooks. 178 closes and the wire W is gripped. When the rotation of the sleeve 174 is permitted, the rotation of the screw shaft causes the sleeve 174 to rotate and the pair of hooks 178 to rotate. Thereby, the wire W is twisted and the plurality of reinforcing bars R are bound. The torsional strength of the wire W can be set in advance by the user. When the control board 200 twists the wire W to the set torsional strength, the control board 200 rotates the torsion motor 170 in the reverse direction. At this time, the rotation of the sleeve 174 is prohibited, and the rotation of the screw shaft causes the sleeve 174 to retreat, and the pair of hooks 178 to retreat while being opened, thereby releasing the wire W. Further, the sleeve 174 is retracted, the pusher 176 is retracted, and the cutting mechanism 44 returns to the initial state. Thereafter, the pusher 176 and the pair of hooks 178 are retracted to the initial position, and the rotation of the sleeve 174 is allowed, so that the pair of hooks 178 returns to the initial angle.

  As shown in FIG. 1, when the user sets the reinforcing bar binding machine 2 so that a plurality of reinforcing bars R are positioned between the upper curl guide 90 and the lower curl guide 92 and pulls the trigger 28, the reinforcing bar binding is performed. The machine 2 winds the wire W around the plurality of reinforcing bars R by the feed mechanism 38, the brake mechanism 40, and the guide mechanism 42, and cuts the wire W by the cutting mechanism 44 and the twisting mechanism 46, thereby A series of operations for twisting the wire W wound around the reinforcing bar R is executed.

  As shown in FIG. 27, in the reinforcing bar binding machine 2 of the present embodiment, the grip 6 is inclined from the front upper side to the rear lower side with respect to the binding machine body 4. The inclination angle of the grip 6 with respect to the binding machine body 4 is an angle between 65 degrees and 80 degrees, for example, an angle between 70 degrees and 75 degrees. By setting it as such a structure, the burden concerning a user's wrist at the time of use of the reinforcing bar binding machine 2 can be reduced. Further, in the reinforcing bar binding machine 2 of the present embodiment, the center of gravity G with the battery B attached is disposed directly above the root of the grip 6 to the binding machine body 4. By setting it as such a structure, the burden concerning a user's wrist at the time of use of the reinforcing bar binding machine 2 can be reduced. Furthermore, in the reinforcing bar binding machine 2 of the present embodiment, the rear surface of the grip 6 and the rear surface of the battery mounting portion 8 are formed in a shape that smoothly continues without a step. By adopting such a configuration, when the reinforcing bar binding machine 2 is used in a downward direction, a portion having a smooth shape hits the palm of the user, and the burden on the palm of the user can be reduced.

  In the reinforcing bar binding machine 2 according to the present embodiment, when viewed in plan from below with the lower surface of the battery B as a reference, the gravity center position G with the battery B attached is disposed inside the lower surface of the battery B. By setting it as such a structure, even when the reinforcing bar binding machine 2 is mounted in the state where the battery B is attached and the lower surface of the battery B is used as a mounting surface, the reinforcing bar binding machine 2 can be stably and independently supported. . Further, in the reinforcing bar binding machine 2 of the present embodiment, when the battery B is attached with respect to the sliding direction of the battery B, the rear side end of the battery B is positioned forward of the rear side end of the grip 6. ing. By setting it as such a structure, when a user works using the reinforcing bar binding machine 2, it can suppress that the battery B interferes with a user's forearm.

  The reinforcing bar binding machine 2 of the present embodiment has a shape in which the tip of the lower curl guide 92 does not exceed the plane P that contacts the tip of the upper curl guide 90 and the tip of the battery B. With such a configuration, when the reinforcing bar binding machine 2 is dropped, the upper curl guide 90 or the battery B collides with the ground before the lower curl guide 92 collides with the ground. Since the lower curl guide 92 includes a mechanism that opens and closes with respect to the binding machine body 4, the lower curl guide 92 is less resistant to impact than the upper curl guide 90 and the battery B. By setting it as the above structures, it can suppress that the lower side curl guide 92 is damaged by an impact. Even when the tip of the lower curl guide 92 has a shape that slightly protrudes from the plane P that is in contact with the tip of the upper curl guide 90 and the tip of the battery B, the amount of protrusion is the amount of the lower curl guide 92 and its opening and closing. The effect similar to the above can be obtained as long as it is small enough to be absorbed by elastic deformation of each component constituting the mechanism and play between each component.

  As shown in FIGS. 1 and 2, in the reinforcing bar binding machine 2 of the present embodiment, an elastic cover 188 is provided on the outer surface of the cover holding portion 54a of the housing mechanism 36 that holds the attachment portion 22a of the reel cover 22, An elastic cover 190 is provided on the cover holding portion 18 a of the side cover housing 18 that holds the attachment portion 22 b of the reel cover 22. The elastic covers 188 and 190 are both made of an elastic material such as an elastomer. Accordingly, even when the reinforcing bar binding machine 2 is placed horizontally, the elastic covers 188 and 190 serve as bumpers, and the components inside the reinforcing bar binding machine 2 can be protected from impact.

  In the above embodiment, the configuration in which the housing mechanism 36 includes the plurality of magnets 60c provided on the turntable 60 and the magnetic sensor 66 in order to detect the rotation of the wire reel WR has been described. Unlike this, a plurality of magnets may be directly attached to the wire reel WR at a predetermined angular interval, and the magnet 60c may not be attached to the turntable 60. Even in this case, the rotation of the wire reel WR can be detected from the magnetic fluctuation from the magnet of the wire reel WR detected by the magnetic sensor 66.

  In the above embodiment, the configuration in which the housing mechanism 36 includes the plurality of magnets 60c provided on the turntable 60 and the magnetic sensor 66 in order to detect the rotation of the wire reel WR has been described. Unlike this, for example, as shown in FIG. 28, in order to detect the rotation of the wire reel WR, the accommodation mechanism 36 includes a plurality of reflecting plates 192 provided on the turntable 60 and an optical sensor 194. Also good. In the configuration shown in FIG. 28, the optical sensor 194 includes a light emitting unit 194a that emits a detection laser toward the wire reel WR and a light receiving unit 194b that receives the laser reflected by the reflecting plate 192. The light emitting unit 194a and the light receiving unit 194b of the optical sensor 194 are electrically connected to the control board 200, respectively. A plurality of reflectors 192 are attached to the rotation detector 60b of the turntable 60 at predetermined angular intervals. The optical sensor 194 is disposed outside the right housing 16. A through hole (not shown) is formed in the right housing 16 so that the light emitting unit 194a and the light receiving unit 194b of the optical sensor 194 are exposed to the wire reel WR. According to the configuration shown in FIG. 28, the control board 200 can detect the rotation of the wire reel WR from the change in the light detected by the light receiving unit 194b of the optical sensor 194.

  In the above-described embodiment, the configuration in which the main driving gear 78 and the driven gear 80 feed the wire W while feeding the feed mechanism 38 is described. However, each of the main driving gear 78 and the driven gear 80 does not have teeth on the side surfaces. It may be a main driving roller and a driven roller.

  In the above embodiment, the reinforcing bar binding machine 2 that binds the plurality of reinforcing bars R by the wires W has been described. However, the binding line may be other than the wires W, and the binding object is other than the plurality of reinforcing bars R. It may be a thing.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. The technical elements described in this 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 exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

2: Reinforcing bar binding machine 4: Bundling machine body 6: Grip 8: Battery mounting part 10: Battery terminal 12: Housing 14: Left housing 14a: Partition wall 16: Right housing 16a: Screw boss 16b: Screw boss 16c: Screw boss 16d : Brake opening 16e: Pin 16f: A pair of clamping walls 16g: Through hole 18: Side cover housing 18a: Cover holding part 20: Reel receiving chamber 20a: Drain hole 22: Reel cover 22a: Mounting part 22b: Mounting part 24 : 1st operation display part 26: 2nd operation display part 28: Trigger 28a: Protrusion part 28b: Concave part 28c: Stopper 30: Trigger lock 30a: Base part 30b: Protrusion part 30c: Engagement part 30d: Left end surface 30e: Right end surface 32: Compression spring 34: Trigger switch 36: Storage mechanism 38: Feed mechanism 4 : Brake mechanism 42: Guide mechanism 44: Cutting mechanism 46: Torsion mechanism 48: Left support mechanism 50: Right support mechanism 52: Base member 52a: Tool receiving groove 54: Cam member 54a: Cover holding portion 54b: Cam protrusion 56: Shaft Member 56a: Reel holding portion 58: Compression spring 60: Turntable 60a: Reel holding portion 60b: Rotation detecting portion 60c: Magnet 62: Inner bearing 64: Outer bearing 66: Magnetic sensor 66a: Hall IC
66b: Through hole 68: Guide member 68a: Insertion hole 68b: Retaining stopper 70: Cover member 70a: Cushion member 72: Feed motor 72a: Output shaft 74: Reduction mechanism 74a: Spur gear 74b: Spur gear 76: Bearing 76a: Dustproof cover 78: main driving gear 78a: V-shaped groove 80: driven gear 80a: V-shaped groove 82: release lever 82a: gear arm 82b: operation arm 82c: swinging shaft 82d: engaging recess 84: compression spring 86: lock lever 86a : Lock arm 86b: Spring receiving arm 86c: Oscillating shaft 86d: Engaging projection 88: Guide pipe 90: Upper curl guide 92: Lower curl guide 92a: Oscillating shaft 92b: Torsion spring 92c: Contact portion 94: No. 1 guide passage 96: second guide passage 98: lead holder 98a: Mounting hole 100: Guide arm 100a: Upper guide wall 100b: Mounting hole 100c: Mounting hole 100d: Mounting hole 102: Contact plate 102a: Contact portion 102b: Oscillating shaft 102c: Connecting portion 104: Left guide plate 106: Inner guide Plate 108: Right guide plate 110: Guide member 110a: Wire passage 112: Top plate 112a: Projection 114: First guide pin 116: Cutter 118: Fixing member 118a: Wire passage 120: Swing member 120a: Through hole 120b: Cutting piece 122: second guide pin 124: third guide passage 124a: left guide wall 124b: right guide wall 126: guard plate 128: compression spring 130: magnet 132: magnet arm 134: magnetic sensor 136: open / close detection mechanism 138: Open / close detection member 138a: Contact arm 138b: Swing shaft 138c: Magnet arm 140: Compression spring 142: Magnetic sensor 144: Magnet 146: Solenoid 148: Compression spring 150: Brake member 150a: Drive arm 150b: Swing shaft 150c : Brake arm 150d: Plate portion 150e: Tip rib 150f: Side end rib 152: Push plate 154: Pull plate 156: First link arm 158: Second link arm 160: Oscillating shaft 162: Oscillating shaft 164: Torsion spring 166: oscillating shaft 168: oscillating shaft 170: torsion motor 172: reduction mechanism 174: sleeve 176: pusher 178: hook 180: side plate 180a: rigid stopper 182: elastic stopper 184: side plate 18 4a: Rigid stopper 186: Elastic stopper 188: Elastic cover 190: Elastic cover 192: Reflecting plate 194: Optical sensor 194a: Light emitting unit 194b: Light receiving unit 200: Control board

Claims (8)

A reel on which a binding wire is wound;
A brake member for engaging and braking the reel;
An actuator for driving the brake member;
The binding machine, wherein the brake member is disposed so as to block between the reel and the actuator.   The binding machine according to claim 1, wherein the brake member is disposed so as to block between the reel and the actuator only by the brake member. The actuator includes a solenoid;
3. The binding machine according to claim 1, wherein the solenoid is disposed so that a longitudinal direction thereof is substantially parallel to a tangential direction of a rotational movement at a position closest to the solenoid of the reel.   The binding machine according to any one of claims 1 to 3, wherein the brake member includes a rib protruding toward the reel or the actuator. The brake member is a single member including a drive arm connected to the actuator and a brake arm engaged with the reel, and is swingable around a swing axis;
The binding according to any one of claims 1 to 4, wherein the actuator drives the drive arm, and the torque around the swing shaft acts on the brake member, whereby the brake arm is engaged with the reel. Machine. A reel storage chamber for storing the reel;
The binding machine according to any one of claims 1 to 5, wherein the reel housing chamber includes a drain hole.   The binding machine according to claim 6, wherein the drain hole is formed in a labyrinth structure.   The binding machine according to claim 6 or 7, wherein the drain hole is arranged at a position where the inside of the reel housing chamber cannot be seen from the rear of the binding machine.

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