JP6730940B2 - Binding machine - Google Patents

Description

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

Patent Document 1 discloses a binding machine. The binding machine includes a feeding mechanism. The feed mechanism includes a feed roller for feeding the binding wire, a feed motor for rotating the feed roller, and a cover arranged between the feed roller and the feed motor and having a through hole.

JP, 2009-275485, A

In the binding machine of Patent Document 1, dust may be generated due to wear of the binding wire and the feed roller, and the dust may move from the feed roller side to the feed motor side through the through hole of the cover. A technique capable of suppressing the movement of dust from the feed roller side to the feed motor side through the through hole is expected.

This specification discloses a binding machine. The binding machine includes a feeding mechanism. The feed mechanism includes a feed roller that feeds a binding wire, a feed motor for rotating the feed roller, a cover having a through hole arranged between the feed roller and the feed motor, and a feed roller side through the through hole. From the feed motor to the feeding motor side.

According to the above configuration, even if dust is generated due to the binding wire or the wear of the feed roller, the restraint member restrains the dust from moving from the feed roller side to the feed motor side through the through hole of the cover. You can It is possible to prevent the feed motor from being affected by dust.

It is the perspective view which looked at reinforcing bar binding machine 2 concerning an example from the upper left back. It is the perspective view which looked at reinforcing bar binding machine 2 concerning an example from the upper right back. It is the perspective view which looked at reinforcing bar binding machine 2 concerning an example from the lower left rear. 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 which concerns on an Example from the lower left rear. In the reinforcing bar binding machine 2 according to the embodiment, it is a perspective view of the trigger 28 and the trigger lock 30 when viewed from the upper right rear when the trigger lock 30 is at the permission position. In the reinforcing bar binding machine 2 according to the embodiment, it is a perspective view of the trigger 28 and the trigger lock 30 when viewed from the upper right rear when the trigger lock 30 is in the prohibited 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 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 the upper left front. It is the perspective view which looked at the reel accommodation room 20 of the reinforcing bar binding machine 2 which concerns on an Example from the upper left rear. 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 wire reel WR, turntable 60, and magnetic sensor 66 of rebar binding machine 2 concerning an example from the upper right back. It is the perspective view which looked at reel storage room 20 of rebar binding machine 2 concerning an example from the upper left back, and is the figure showing the neighborhood of drainage hole 20a in a section. It is the perspective view which looked at the feed mechanism 38 of the reinforcing bar binding machine 2 which concerns on an Example 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 reduction mechanism 74, the bearing 76, and the driving gear 78 of the reinforcing bar binding machine 2 which concerns on an Example from the upper right rear. It is sectional drawing of the cover member 70, the feed motor 72, the reduction mechanism 74, the bearing 76, and the driving gear 78 of the reinforcing bar binding machine 2 which concerns on an Example. It is the perspective view which looked at guide member 68 of rebar binding machine 2 concerning an example from the upper left back. It is the perspective view which looked at the release lever 82 and lock lever 86 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 upper side curl guide 90 of rebar binding machine 2 concerning an example from the upper left back. It is the perspective view which looked at upper curl guide 90 of rebar binding machine 2 concerning an example from the upper right back. It is the perspective view which looked at the internal structure of the 1st guide passage 94 of the upper side curl guide 90 of the reinforcing bar binding machine 2 and the internal structure of the binding machine main body 4 from the upper left rear. It is the perspective view which looked at the internal structure of the 2nd guide passage 96 of upper curl guide 90 of rebar tying machine 2 concerning an example, and the internal structure of binding machine main part 4 from the upper left back. In the reinforcing bar binding machine 2 which concerns on an Example, when the lower side curl guide 92 is closed, it is the perspective view which looked at the internal structure of the binding machine main body 4 from the lower right front. In the reinforcing bar binding machine 2 which concerns on an Example, when the lower side curl guide 92 is open, it is the perspective view which looked at the internal structure of the binding machine main body 4 from the lower right front. In the reinforcing bar binding machine 2 according to the embodiment, it is a perspective view of the wire reel WR and the brake mechanism 40 viewed from the upper right rear when the solenoid 146 is not energized. FIG. 7 is a perspective view of the wire reel WR and the brake mechanism 40 as viewed from the upper right rear side 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 twisting 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, turntable 60, and optical sensor 194 of the reinforcing bar binding machine 2 concerning a 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 attaching the magnetic sensor 66 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, taken along line XXXI-XXXI in FIG. 29. 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, taken along line XXXII-XXXII in FIG. 29. FIG. 30 is a cross-sectional view of the right housing 16, the side cover housing 18, the turntable 60, and the magnetic sensor 66 of the reinforcing bar binding machine 2 according to the embodiment, taken along line XXXIII-XXXIII in FIG. 29.

In one or more embodiments, the tying machine comprises a feed mechanism. The feed mechanism includes a feed roller that feeds a binding wire, a feed motor for rotating the feed roller, a cover having a through hole arranged between the feed roller and the feed motor, and a feed roller side through the through hole. And a suppressing member that suppresses the movement of the dust that moves from the side to the feed motor side.

According to the above configuration, even if dust is generated due to the binding wire or the wear of the feed roller, the restraint member restrains the dust from moving from the feed roller side to the feed motor side through the through hole of the cover. You can It is possible to prevent the feed motor from being affected by dust.

In one or more embodiments, the binding machine may further include a rotation transmission mechanism that transmits the rotation of the feed motor to the feed roller via the through hole.

When a rotation transmission mechanism that transmits the rotation of the feed motor to the feed roller through the through hole of the cover is provided, the dust generated due to the binding wire and the wear of the feed roller moves to the feed motor side through the through hole of the cover. Cheap. According to the above configuration, the suppressing member can suppress the movement of the dust that moves from the feed roller side to the feed motor side through the through hole of the cover. It is possible to prevent the feed motor from being affected by dust.

In one or more embodiments, the restraining member may be a dustproof bearing.

According to the above configuration, the dustproof bearing can rotatably support the feed roller and the rotation transmission mechanism, and the dust that moves from the feed roller side to the feed motor side through the through hole of the cover. The movement can be suppressed.

In one or more embodiments, the feed mechanism is disposed on the feed motor side when viewed from the cover, and may further include a reduction mechanism that reduces the rotation of the feed motor and transmits the rotation to the feed roller.

According to the above configuration, the suppressing member can suppress the movement of the dust that moves from the feed roller side to the feed motor side through the through hole of the cover, and thus is disposed on the feed motor side when viewed from the cover. It is possible to prevent the deceleration mechanism from being affected by dust.

In one or more embodiments, at least the feed roller, the feed motor, the cover, and the restraining member may be unitized.

According to the above configuration, the workability of assembling the binding machine can be improved.

In one or more embodiments, the feed mechanism may be disposed on the feed roller side when viewed from the cover, and may further include a guide member that guides the binding line to the feed roller, and the guide member may suppress the restraint. The member may be fixed to the cover so as to prevent the member from coming off the cover.

According to the above configuration, the bundling wire can be guided to the feed roller by the guide member, and the restraining member can be prevented from coming off the cover.

In one or more embodiments, the guide member may include an insertion hole that guides the binding wire, and the inlet of the insertion hole is open toward at least the side opposite to the cover side when viewed from the guide member. You may have.

According to the above configuration, when the user sets the binding wire on the feeding mechanism, the tip of the binding wire can be easily inserted into the insertion hole.

(Example)
A reinforcing bar binding 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 a wire W.

As shown in FIGS. 1 and 2, the reinforcing bar binding machine 2 is provided on the binding machine body 4 and a lower portion of the binding machine body 4, and is provided on the grip 6 that can be held by the user and on the lower portion of the grip 6. The battery mounting portion 8 is provided. The battery B can be attached to and detached from the lower portion of the battery mounting portion 8. The battery B is a slide type battery that can be attached/detached 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, the reinforcing bar binding machine 2 is supplied with electric power from the battery B. As shown in FIG. 3, a battery terminal 10 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 the control board 200 (see FIG. 8) housed in the lower portion 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 resin members. The left housing 14, the right housing 16, and the side cover housing 18 can be said to be a plurality of housing plates forming the housing 12. As shown in FIG. 1, in the left housing 14, the outer shape of the left half of the binding machine 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. Has been 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 formed integrally. The left housing 14 is fixed to the right housing 16 with 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 housing chamber 20 for housing 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 on the upper side. 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, and is rotated with respect to the binding machine body 4 with the left-right direction as a rotation axis. The reel storage chamber 20 is opened and closed.

As shown in FIG. 1, a first operation display unit 24 is provided in the upper left portion near the center of the binding machine body 4 in the front-rear direction. The first operation display unit 24 includes a main switch for switching on/off the power of the reinforcing bar binding machine 2, a main power LED for displaying the on/off state of the power 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 inclines from the upper right to the lower left when the binding machine body 4 is viewed from the rear. Since the first operation display unit 24 is arranged so as to be inclined, the user of the reinforcing bar binding machine 2 can perform the first operation whether the binding machine body 4 is viewed from the left side or the upper side. The display unit 24 can be viewed well. Further, since the first operation display unit 24 is arranged so as to be inclined as described above, compared to a case where the first operation display unit 24 is arranged along the upper surface or the side surface of the binding machine body 4, the binding machine body is arranged. It is possible to reduce the dead space inside 4 and to downsize the binding machine body 4.

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 feed amount of the wire W, the twisting 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 a user is arranged on the upper front side of the grip 6, and a trigger lock 30 that is arranged behind the trigger 28 and is switchable between a state in which the pulling operation of the trigger 28 is permitted and a state in which the pulling operation is prohibited. 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 biased 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 on the lower rear portion of the trigger 28. A trigger switch 34 is arranged at the upper part inside the grip 6. The trigger switch 34 is electrically connected to the control board 200. When the user puts 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 28 a presses the trigger switch 34. When the user releases the finger from the trigger 28, the trigger 28 moves forward due to the urging force of the compression spring 32, and the protrusion 28 a separates from the trigger switch 34.

As shown in FIGS. 5 and 6, the trigger lock 30 is formed on the base portion 30a extending linearly in the left-right direction, the protrusion portion 30b protruding forward from the vicinity of the center of the base portion 30a, and the rear surface near the center of the base portion 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 portion 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 permission position where the pulling operation of the trigger 28 is permitted and a prohibition position where the pulling operation of the trigger 28 is prohibited. As shown in FIGS. 5 and 6, a recess 28b that can receive the protrusion 30b and a stopper 28c that prohibits the protrusion 30b from being received are formed in the upper rear portion of the trigger 28. As shown in FIG. 5, when the trigger lock 30 is in the permission position, the left end surface 30d of the trigger lock 30 projects outward from the left surface of the grip 6, and the engaging portion 30c is provided on the left housing 14 and the right housing 16. It engages with the formed engaged portion (not shown). Further, when the trigger lock 30 is in the permission position, the protrusion 30b of the trigger lock 30 faces the recess 28b of the trigger 28. In this state, when the trigger 28 moves rearward, the protrusion 30b is received in the recess 28b, so that the trigger 28 can move rearward. That is, when the trigger lock 30 is in the permission position, the user can pull the trigger 28. When the user pushes the left end surface 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 portion 30c of the trigger lock 30 is disengaged, 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 30e of the trigger lock 30 projects outward from the right surface of the grip 6, and the engaging portion 30c is attached to the left housing 14 and the right housing 16. It engages with the formed engaged portion (not shown). Further, when the trigger lock 30 is in the prohibited position, the protruding portion 30b of the trigger lock 30 faces the stopper 28c of the trigger 28. In this state, when the trigger 28 moves rearward, the protrusion 30b comes into contact with the stopper 28c, and further movement of the trigger 28 backward is prohibited. 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 surface 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 is released. Slides to the left and moves to the allowed position. Since the reinforcing bar binding machine 2 of the present embodiment uses the slide type trigger lock 30 as described above, the mechanical structure can be simplified as compared with the case of using the rotary type trigger lock. Therefore, the reinforcing bar binding machine 2 can be downsized.

As shown in FIGS. 7 and 8, the binding machine main body 4 mainly includes a housing mechanism 36, a feeding mechanism 38, a braking mechanism 40, a guiding mechanism 42, a cutting mechanism 44, a twisting mechanism 46, and a control mechanism. A substrate 200 is provided.

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

As shown in FIGS. 9 and 10, the accommodation mechanism 36 includes a left support mechanism 48 provided on the left side of the reel accommodation chamber 20 and a right support mechanism 50 provided on the right side of the reel accommodation 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, on the upper surface of the base member 52, a tool accommodating groove 52a such as a hexagon wrench HW capable of accommodating a tool used by the user for maintenance of the reinforcing bar binding machine 2 is formed. As shown in FIG. 10, the cam member 54 is arranged 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 projects to the outside of 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 in the side cover housing 18. As shown in FIG. 9, a cam protrusion 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 portion 22a of the reel cover 22 corresponding to the cam projection 54b of the cover holding portion 54a. As shown in FIG. 10, the shaft member 56 includes a cylindrical reel holding portion 56 a that projects inside the reel housing chamber 20. The shaft member 56 is fixed to the cam member 54 by a plurality of screws. Therefore, the shaft member 56 is slidable in the left-right direction with respect to the base member 52 together with the cam member 54. Further, the shaft member 56 is biased rightward (that is, inside the reel housing 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 of 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 is inserted into 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 thus the reel cover 22. Is closed. At this time, since the reel holding portion 56a is slidably inserted into the shaft receiving groove WRa, the wire reel WR is rotatably held by 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 22a of the reel cover 22 is rotated by the cam of the cover holding portion 54a as the reel cover 22 rotates. The protrusion 54b is pressed leftward (that is, to the outside of the reel housing chamber 20). As a result, the cam member 54 and the shaft member 56 move to the left side of the base member 52 (that is, to the outside of 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 put the wire reel WR in and out of the reel housing 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 rotary base 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 projects inside the reel housing chamber 20, and a disc-shaped rotation detection portion 60 b that is arranged along the inner surface of the reel housing chamber 20. The reel holding portion 60a relatively non-rotatably engages with the shaft receiving groove WRb of the wire reel WR. Therefore, when the wire reel WR rotates, the turntable 60 also rotates integrally 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 arranged 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 16e projecting in a cylindrical shape from the outer surface of the right housing 16 at a position corresponding to the through hole 66b of the magnetic sensor 66, and the magnetic sensor 66 is 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 holding walls 16f of the right housing 16. When the magnetic sensor 66 is attached to the right housing 16, the magnetic sensor 66 is arranged at a position where the Hall IC 66 a faces the magnet 60 c via 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 together with the wire reel WR, and the magnetism detected by the Hall IC 66a fluctuates. The control board 200 can detect the rotation of the wire reel WR from the fluctuation of the magnetism 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, the magnetic sensor 66 is attached to the right housing 16 that rotatably holds the turntable 60 via the inner bearing 62 and the outer bearing 64. With such a configuration, the magnet 60c attached to the turntable 60 and the magnetic sensor 66 can be accurately positioned.

As shown in FIG. 3, a water drain hole 20a is formed at the bottom of the reel housing chamber 20. By forming the water drain hole 20a, even when water enters the inside of the reel housing chamber 20, it is possible to drain the water from the inside of the reel housing chamber 20 to the outside. The drainage hole 20a is arranged 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 user's body behind the reinforcing bar binding machine 2, and the safety of the user can be secured. Further, as shown in FIG. 12, the drain hole 20a has a so-called labyrinth structure in which the partition wall 14a formed in the left housing 14 cannot visually recognize the inside from the outside of the reel housing chamber 20. There is. With such a configuration, it is possible to prevent foreign matter from entering the inside of the reel housing chamber 20 through the water drain hole 20a.

As shown in FIG. 7, the feeding mechanism 38 is arranged in the upper part of the binding machine body 4 near the center in the front-rear direction, and feeds the wire W supplied from the wire reel WR of the housing mechanism 36 to the binding machine body 4. It sends it 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 reduction mechanism 74, a bearing 76, a driving gear 78, a driven gear 80, and a release lever 82. , A compression spring 84 (see FIG. 17) and a lock lever 86. As shown in FIGS. 14 and 15, the cover member 70, the feed motor 72, the reduction mechanism 74, the bearing 76, and the 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 while being fixed by. The cover member 70 is sandwiched between the right housing 16 and the side cover housing 18 via the cushion member 70a. Therefore, it is possible to suppress the movement of dust or the like through the gap between the cover member 70 and the right housing 16 or the gap between the cover member 70 and the side cover housing 18.

As shown in FIG. 15, a V-shaped groove 78a extending in the radial direction at the center in the height direction is formed on the side surface of the driving gear 78. As described later, the driving gear 78 functions as a feed roller that feeds out the wire W. The driving gear 78 is connected to the feed motor 72 via the 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 reduction mechanism 74 includes a pair of spur gears 74a and 74b. The spur gear 74a is fixed to the output shaft 72a of the feed motor 72. The spur gear 74b is fixed to the driving gear 78 by screws. The cover member 70 is formed with a through hole through which the spur gear 74b and the driving gear 78 pass. The spur gear 74 b and the main drive gear 78 constitute a rotation transmission mechanism that transmits the rotation of the feed motor 72 to the main drive gear 78 via the through hole of the cover member 70. The driving gear 78 is rotatably held by the cover member 70 via a bearing 76. The bearing 76 is a dustproof bearing, and is provided with a dustproof cover 76a that prevents dust from entering the inside of the bearing 76. The dustproof cover 76 a 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 housed in the space inside the cover member 70. That is, the reduction mechanism 74 is arranged on the feed motor 72 side as viewed from the cover member 70, and decelerates the rotation of the feed motor 72 and transmits it to the driving gear 78. In the reinforcing bar binding machine 2, dust may be generated due to wear of the wire W and the driving gear 78 when the driving gear 78 sends out the wire W. When this dust reaches the feed motor 72 and the speed reduction mechanism 74, the operations 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 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 68a for guiding 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 by obliquely cutting a cone having a large diameter on the inlet side and a small diameter on the outlet side. Therefore, the inlet of the insertion hole 68a of the guide member 68 is open both upward and backward. The inlet of the insertion hole 68a opens upward, that is, the inlet of the insertion hole 68a opens toward the side opposite to the cover member 70 side when viewed from the guide member 68, so the reinforcing bar binding machine 2 The user can easily insert the tip of the wire W into the insertion hole 68a when passing the wire W pulled out from the wire reel WR through the insertion hole 68a. Further, the guide member 68 is formed with 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 retaining member 68b on the guide member 68, the guide member 68 can be used as a retaining member that prevents the bearing 76 from coming off 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 82b of the release lever 82 is biased leftward, that is, outward by a compression spring 84 held by the right housing 16. Normally, the biasing force of the compression spring 84 applies a torque in the direction of bringing the driven gear 80 closer to the driving gear 78 to the release lever 82, and the driven gear 80 is pressed against the driving gear 78. As a result, the side teeth of the driven gear 80 and the side teeth of the driving gear 78 are engaged with each other, and the wire W is interposed between the V-shaped groove 78a of the driving gear 78 and the V-shaped groove 80a of the driven gear 80. It is pinched. When the feed motor 72 rotates the main drive gear 78 in this state, the driven gear 80 rotates in the opposite direction, and the wire W sandwiched between the main drive 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 biased rightward by a compression spring (not shown) held by the right housing 16. Due to the biasing force of this compression spring, a torque is applied to the lock lever 86 in a direction to bring the lock arm 86 a closer to the operation arm 82 b of the release lever 82. As shown in FIG. 17, the lock arm 86 a of the lock lever 86 is formed with an engaging projection 86 d, and the operating arm 82 b of the release lever 82 is provided with an engaging recess 82 d that engages with the engaging projection 86 d. Has been formed.

When the user of the reinforcing bar binding machine 2 pushes the operation arm 82b against the biasing force of the compression spring 84, the release lever 82 swings around the swing shaft 82c, and the driven gear 80 separates from the driving gear 78. To do. At this time, when the operation arm 82b is pushed to a position where the engagement concave portion 82d of the operation arm 82b faces the engagement convex portion 86d of the lock arm 86a, the lock lever 86 swings around the swing shaft 86c. The engagement protrusion 86d of the lock arm 86a engages with the engagement recess 82d of the operation arm 82b. As a result, the operation arm 82b is held in the pushed state. When setting the wire W extending from the wire reel WR in the feed mechanism 38, the user pushes the operation arm 82b to separate the driven gear 80 from the driving gear 78, and in that state, the wire W pulled out from the wire reel WR. The tip is arranged between the main gear 78 and the driven gear 80 through the insertion hole 68a of the guide member 68. When the user swings the lock arm 86a of the lock lever 86 in the 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, and the release lever 82 swings around the swing shaft 82c by the urging force of the compression spring 84, the driven gear 80 engages with the driving gear 78, and the driving gear 78 moves. The 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 in the front part of the binding machine body 4, and guides the wire W sent from the feed mechanism 38 in an annular shape around the plurality of reinforcing bars R (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 end of the guide pipe 88 on the rear side is open between the driving gear 78 and the driven gear 80 of the feeding mechanism 38. The wire W sent from the sending mechanism 38 is sent into the inside of the guide pipe 88. As shown in FIG. 20, the front end of the guide pipe 88 is open 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 fed from the guide pipe 88, and the second guide for guiding the wire W fed 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. The member 110 (see FIG. 20) and the top plate 112 (see FIG. 20) are provided.

In the lead holder 98, the opening on the front side of the guide pipe 88 is opened 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. The guide pipe 88 is held. As shown in FIG. 20, the guide member 110 is a metal member, and the wire passage 110a through which the wire W passes is formed therein. A first guide pin 114 is arranged 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 delivered 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 fixed member 118 and a swing member 120. The fixing member 118 is a metal member having a cylindrical outer shape, and a wire passage 118a through which the wire W passes is formed therein. 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 swinging member 120 is a metal member having a through hole 120a through which the fixing member 118 penetrates and a cutting piece 120b for cutting the wire W, and the inner guide plate 106 and the right guide via the fixing member 118. The plate 108 is swingably held. The cutting piece 120b cuts the wire W by shearing when the swing member 120 swings. The top plate 112 is a member made of metal 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 112 a of the top plate 112 and the second guide pin 122. The second guide pin 122 is a member made of metal having high wear resistance such as tungsten, and is press-fitted into the right guide plate 108. When passing through the first guide passage 94, the wire W is wound toward the lower curl guide 92 while being wound around by the inner upper surface of the wire passage 110 a, the first guide pin 114, and the second guide pin 122. 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 plates 126 are formed in a shape that extends upward on both sides of the third guide passage 124, prevent the plurality of reinforcing bars R from interfering with the twisting mechanism 46, and allow foreign matter to enter the binding machine body 4. To prevent In addition, the guard plate 126 prevents the wire W from moving wildly 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 arc-shaped upper guide wall 100a that guides the wire W is formed on the lower front surface 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 again sent 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 arranged 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 a swing shaft 102b. The connecting portion 102c of the contact plate 102 is biased 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. Normally, the magnet 130 of the contact plate 102 is arranged at a position facing the magnetic sensor 134. When the plurality of reinforcing bars R are pressed against the contact portion 102a when the reinforcing bar binding machine 2 is set to the plurality of reinforcing bars R by the user, the contact plate 102 swings against the biasing force of the compression spring 128, The magnet 130 of the magnet arm 132 is arranged at a position separated from the magnetic sensor 134. The control board 200 can detect from the detection signal of the magnetic sensor 134 whether or not the plurality of reinforcing bars R are pressed against the contact portion 102a.

As shown in FIG. 19, the lead holder 98 has one mounting hole 98a. As shown in FIG. 18, the guide arm 100 has three mounting 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, the right housing 16 at the front of the binding machine body 4 is provided with screw bosses 16a, 16b, 16c used when the left housing 14 is attached to the right housing 16. The upper side curl guide 90 fits the mounting hole 98a of the lead holder 98 and the mounting hole 100b of the guide arm 100 into the screw boss 16a, the screw boss 16b into the mounting hole 100c of the guide arm 100, and the screw boss 16c. By fitting the mounting hole 100d of the guide arm 100, it is mounted on the right housing 16. By mounting the upper curl guide 90 on the right housing 16 using the screw bosses 16a, 16b, 16c used when mounting the left housing 14 on the right housing 16, the upper curl guide 90 can be mounted on the right housing 16 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, since the portions where the screw bosses 16a, 16b, 16c are formed have relatively high strength in the right housing 16, 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 this case, high durability can be ensured. The upper curl guide 90 may be attached to the right housing 16 at any number of locations as long as it is two or more. Among them, the number of places 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 may be four or more. Good. The upper curl guide 90 can be accurately positioned with respect to the right housing 16 by using two or more places where the upper curl guide 90 is attached using the screw boss. Further, the higher the number of places where the upper curl guide 90 is attached using the screw boss, the higher the durability can be secured.

As shown in FIG. 8, the lower curl guide 92 is swingably supported by the left housing 14 and the right housing 16 via a swing shaft 92a. The lower curl guide 92 can swing between the closed state shown in FIG. 22 and the open state shown in FIG. As shown in FIG. 8, the lower curl guide 92 is biased 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 is using the reinforcing bar binding machine 2 and the wire W is entangled with the twisting mechanism 46, the user twists by opening the lower curl guide 92 against the urging force of the torsion spring 92b. The wire W entangled in the mechanism 46 can be removed.

As shown in FIGS. 22 and 23, an opening/closing detection mechanism 136 that detects the opened/closed state of the lower curl guide 92 is provided in the lower front 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 opening/closing detection member 138 is biased by the compression spring 140 held by the right housing 16 in the swinging direction of the contact arm 138a toward the upper side. A magnet 144 (see FIG. 23) is attached to the magnet arm 138c of the opening/closing 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 92c protruding rearward is formed at a lower rear portion of the lower curl guide 92. As shown in FIG. 22, when the lower curl guide 92 is closed by the urging force of the torsion spring 92b, the contact portion 92c of the lower curl guide 92 pushes down the contact arm 138a of the opening/closing detection member 138, and the magnet arm. The magnet 144 of 138c is arranged 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 92 b, the contact portion 92 c of the lower curl guide 92 separates from the contact arm 138 a of the open/close detection member 138. .. As a result, the opening/closing detection member 138 is swung by the urging force of the compression spring 140, and the magnet 144 of the magnet arm 138c is arranged at a position separated 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 180 a extending from a metal side plate 180 attached to the left housing 14 and an elastic stopper 182. There is. The elastic stopper 182 is made of an elastic material such as urethane pin, rubber pin, and elastomer. Further, as shown in FIGS. 20 and 21, in the right housing 16 near the lower curl guide 92, a rigid stopper 184a extending from a metal side plate 184 attached to the right housing 16 and an elastic stopper 186 are provided. It is provided. The elastic stopper 186 is made of an elastic material such as urethane pin, rubber pin, and elastomer. When the lower curl guide 92 is closed as shown in FIG. 22 from the open state of the lower curl guide 92 shown in FIG. 23, the lower curl guide 92 first contacts the elastic stoppers 182, 186. After that, they come into contact with the rigid stoppers 180a and 184a. With such a configuration, it is possible to suppress the generation of a loud collision sound even when the lower curl guide 92 is vigorously closed.

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

The brake mechanism 40 shown in FIG. 7 stops the rotation of the wire reel WR in conjunction with the feeding mechanism 38 stopping the feeding 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 a swing shaft 150b. An output shaft of a solenoid 146 that moves up and down is connected to the drive arm 150a of the brake member 150. Further, the brake member 150 is biased by the compression spring 148 in the 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 wire reels WR at both ends of the plate portion 150d. The side end rib 150f protruding to the side is provided. On the wire reel WR, engaging portions WRc with which the tip ribs 150e of the brake arms 150c are engaged are formed at predetermined angular intervals in the circumferential direction. As shown in FIG. 24, when 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, when 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 engages with the engaging portion WRc of the wire reel WR by swinging around the moving shaft 150b. When the feeding mechanism 38 feeds out the wire W, the control board 200 does not energize the solenoid 146, but separates the brake arm 150c from the engaging portion WRc of the wire reel WR. Accordingly, the wire reel WR can freely rotate, and the feeding mechanism 38 can pull out the wire W from the wire reel WR. 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. As a result, the rotation of the wire reel WR is prohibited. Accordingly, even after the feeding mechanism 38 stops feeding the wire W, it is possible to prevent the wire reel WR from continuing to rotate due to inertia and the wire W from being loosened between the wire reel WR and the feeding mechanism 38. ..

As shown in FIG. 7, the brake mechanism 40 is arranged outside the right housing 16 and is housed 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 provided with a brake opening 16d having substantially the same size as the brake arm 150c of the brake member 150. With such a configuration, although the brake opening 16d exists between the wire reel WR and the solenoid 146, the space between them is blocked by the plate portion 150d of the brake arm 150c. Therefore, it is possible to prevent foreign matter from moving from the inside of the reel housing chamber 20 to the solenoid 146 side through the brake opening 16d. It is possible to prevent the solenoid 146 from being affected by foreign matter. Note that, as shown in FIG. 9, the brake arm 150c of the brake member 150 has a shape that is bent in the left-right direction so that the lower portion is offset to the left side as compared with the upper portion. With such a configuration, the solenoid 146 can be arranged at a position offset to the right with respect to the engaging portion WRc of the wire reel WR. In the reinforcing bar binding machine 2 of the present embodiment, a twisting motor 170 of a twisting mechanism 46 described later is arranged in front of the wire reel WR. According to the above configuration, the torsion motor 170 of the torsion mechanism 46 and the solenoid 146 are arranged side by side in the left-right direction, so that the binding machine body 4 can be downsized.

As shown in FIGS. 24 and 25, the solenoid 146 is arranged such that its longitudinal direction is substantially parallel to the tangential direction of the rotational movement of the portion of the wire reel WR closest to the solenoid 146. Further, the solenoid 146 is arranged such that its longitudinal direction is substantially parallel to the axis of the feed motor 72. With such a configuration, as shown in FIG. 7, even when the wire reel WR and the feed motor 72 are arranged close to each other in the front-back direction of the binding machine body 4, the solenoid is provided between the wire reel WR and the feed motor 72. 146 can be arranged, and the binding machine body 4 can be downsized. Further, since the solenoid 146 is interposed between the wire reel WR and the feed motor 72, a certain distance 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 small, it becomes difficult for the user to pass the wire W pulled out from the wire reel WR through the insertion hole 68a of the guide member 68. According to the configuration of the present embodiment, even when the wire reel WR and the feed motor 72 are arranged close to each other, a certain distance is secured between the guide member 68 provided above the feed motor 72 and the wire reel WR. Therefore, the workability of the user can be improved.

In the reinforcing bar binding machine 2, the partition wall that blocks the solenoid 146 and the wire reel WR is not provided in the right housing 16 or the side cover housing 18, and the solenoid 146 and the wire reel WR are shielded only by the brake member 150. It may be configured to do so. 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 has a plate portion 150d formed in a wide plate shape, and a tip rib 150e protruding toward the wire reel WR at the tip of the plate portion 150d, Side end ribs 150f protruding toward the wire reel WR are provided at both ends of the plate portion 150d. With such a configuration, the strength of the brake arm 150c can be increased and the durability of the brake member 150 can be improved. The side ribs 150f may be formed so as to project to the solenoid 146 side.

As shown in FIG. 8, the cutting mechanism 44 is arranged in the front part of the binding machine body 4, and cuts the wire W in a state in which the wire W is wound around a 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 swingably connected to each other via a swing shaft 160. Further, the push plate 152 and the pull plate 154 are swingably supported by the guide arm 100 via a swing shaft 162. 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 swingably connected to each other via a swing shaft 166. The second link arm 158 is swingably connected to the swing member 120 of the cutter 116 via a swing shaft 168.

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

The twisting mechanism 46 shown in FIG. 8 is arranged from the front part of the binding machine main body 4 to the middle part in the front-rear direction, and twists the wire W wound around the plurality of reinforcing bars R to generate a plurality of reinforcing bars R. Are tied with a wire W. As shown in FIG. 26, the torsion mechanism 46 includes a torsion motor 170, a 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 DC 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 accordingly, the screw shaft can also rotate in the forward and reverse directions. The sleeve 174 is arranged so as to cover the periphery of the screw shaft. When 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 pushes the lower part of the push plate 152 of the cutting mechanism 44 forward, so that the swing member 120 of the cutter 116 swings around the fixed member 118. Move. On the contrary, when the sleeve 174 is retracted from the advanced position to the predetermined position, the pusher 176 presses the lower part of the pull plate 154 of the cutting mechanism 44 toward the rear, so that the swing member 120 of the cutter 116 is fixed by the fixing member 118. Rock around. The pair of hooks 178 is provided at the front end of the sleeve 174 and opens and closes according to the position of the sleeve 174 in the front-rear direction. When the sleeve 174 moves forward, the pair of hooks 178 are closed to hold the wire W. On the contrary, when the sleeve 174 moves backward, the pair of hooks 178 are opened to release the wire W.

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, the sleeve 174 moves forward by the rotation of the screw shaft, the pusher 176 and the pair of hooks 178 move forward, and the cutting mechanism 44 cuts the wire W and the pair of hooks. 178 is closed and the wire W is gripped. When the rotation of the sleeve 174 is permitted, the rotation of the screw shaft rotates the sleeve 174 and the pair of hooks 178. Thereby, the wire W is twisted and the plurality of reinforcing bars R are bound together. The torsional strength of the wire W can be preset by the user. When the control board 200 twists the wire W to the set twist strength, the control board 200 rotates the twist motor 170 in the opposite direction. At this time, the rotation of the sleeve 174 is prohibited, and the sleeve 174 is retracted by the rotation of the screw shaft and the pair of hooks 178 is retracted while being opened, and the wire W is released. Further, as the sleeve 174 retracts, the pusher 176 retracts, and the cutting mechanism 44 returns to the initial state. After that, the pusher 176 and the pair of hooks 178 retract to the initial position, the rotation of the sleeve 174 is allowed, and 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 the plurality of reinforcing bars R are positioned between the upper side curl guide 90 and the lower side 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 to make a plurality of wires W. 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 upper front side to the lower rear 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. With such a configuration, it is possible to reduce the burden on the wrist of the user when the reinforcing bar binding machine 2 is used. Further, in the reinforcing bar binding machine 2 of the present embodiment, the center of gravity position G with the battery B attached is located directly above the base of the grip 6 to the binding machine body 4. With such a configuration, it is possible to reduce the burden on the wrist of the user when the reinforcing bar binding machine 2 is used. Further, 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 smoothly continuous shape without a step. With 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 of the present embodiment, when viewed from below with the lower surface of the battery B as a reference, the center of gravity position G with the battery B attached is arranged inside the lower surface of the battery B. With such a configuration, even when the reinforcing bar binding machine 2 is placed with the lower surface of the battery B as a placement surface with the battery B attached, the reinforcing bar binding machine 2 can be made to stand stably. .. In addition, in the reinforcing bar binding machine 2 of the present embodiment, with respect to the sliding direction of the battery B, when the battery B is attached, the rear end of the battery B is located ahead of the rear end of the grip 6. ing. With such a configuration, it is possible to prevent the battery B from interfering with the user's forearm when the user works with the reinforcing bar binding machine 2.

In the reinforcing bar binding machine 2 of this embodiment, the tip of the lower curl guide 92 does not exceed a 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. The lower curl guide 92 has a mechanism for opening and closing with respect to the binding machine body 4, and therefore has lower durability against impact than the upper curl guide 90 and the battery B. With the above configuration, it is possible to prevent the lower curl guide 92 from being damaged by an impact. Even when the tip end of the lower curl guide 92 slightly protrudes from the plane P that is in contact with the tip end of the upper curl guide 90 and the tip end of the battery B, the protrusion amount is the same as that of the lower curl guide 92 and its opening/closing. The same effect as described 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, the elastic cover 188 is provided on the outer surface of the cover holding portion 54a of the housing mechanism 36 that holds the mounting portion 22a of the reel cover 22, An elastic cover 190 is provided on the cover holding portion 18a of the side cover housing 18 that holds the mounting portion 22b of the reel cover 22. Each of the elastic covers 188 and 190 is made of an elastic material such as elastomer. Accordingly, even when the reinforcing bar binding machine 2 is placed horizontally, the elastic covers 188 and 190 serve as bumpers to protect the internal parts of the reinforcing bar binding machine 2 from impact.

In the above-described embodiment, in order to detect the rotation of the wire reel WR, the housing mechanism 36 has the configuration including the plurality of magnets 60c provided on the turntable 60 and the magnetic sensor 66. Differently from this, a plurality of magnets may be directly attached to the wire reel WR at predetermined angular intervals, 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 fluctuation of the magnetism of the magnet of the wire reel WR detected by the magnetic sensor 66.

In the above-described embodiment, in order to detect the rotation of the wire reel WR, the housing mechanism 36 has the configuration including the plurality of magnets 60c provided on the turntable 60 and the magnetic sensor 66. Unlike this, for example, as shown in FIG. 28, in order to detect the rotation of the wire reel WR, the housing mechanism 36 includes a plurality of reflectors 192 provided on the turntable 60 and an optical sensor 194. 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 reflector 192. The light emitting section 194a and the light receiving section 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 arranged outside the right housing 16. A through hole (not shown) is formed in the right housing 16 so that the light emitting portion 194a and the light receiving portion 194b of the optical sensor 194 are exposed to the wire reel WR. With 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 embodiment, the feed mechanism 38 has been described with respect to the configuration in which the main driving gear 78 and the driven gear 80 sandwich and feed the wire W, but the main driving gear 78 and the driven gear 80 do not have teeth on their side surfaces. It may be a driving roller and a driven roller.

In the above embodiment, the reinforcing bar binding machine 2 that binds the plurality of reinforcing bars R with the wires W has been described, but the binding wire may be other than the wires W, and the binding target may be other than the plurality of reinforcing bars R. It may be one.

Specific examples of the present invention have been described above 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 changes of the specific examples illustrated above. The technical elements described in the present specification or the drawings exert technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Further, the technique illustrated in the present specification or the drawings can simultaneously achieve a plurality of purposes, and achieving the one purpose among them has technical utility.

2: Reinforcing bar binding machine 4: Binding 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: Pair of sandwiching walls 16g: Through hole 18: Side cover housing 18a: Cover holding part 20: Reel accommodating chamber 20a: Drain hole 22: Reel cover 22a: Mounting part 22b: Mounting part 24 : First operation display section 26: Second operation display section 28: Trigger 28a: Projection section 28b: Recess section 28c: Stopper 30: Trigger lock 30a: Base section 30b: Projection section 30c: Engagement section 30d: Left end surface 30e: Right end surface 32: compression spring 34: trigger switch 36: accommodating mechanism 38: feed mechanism 40: brake mechanism 42: guide mechanism 44: cutting mechanism 46: twisting mechanism 48: left supporting mechanism 50: right supporting mechanism 52: base member 52a: tool accommodating Groove 54: Cam member 54a: Cover holding portion 54b: Cam projection 56: Shaft member 56a: Reel holding portion 58: Compression spring 60: Rotating table 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 piece 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: driving gear 78a: V-shaped groove 80: driven gear 80a: V-shaped groove 82: release lever 82a: gear arm 82b: operating arm 82c: swing shaft 82d: engagement recess 84: compression spring 86: lock lever 86a : Lock arm 86b: Spring receiving arm 86c: Swing shaft 86d: Engagement convex part 88: Guide pipe 90: Upper curl guide 92: Lower curl guide 92a: Swing shaft 92b: Torsion spring 92c: Contact part 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: swing Shaft 102c: Connection part 104: Left guide plate 106: Inner guide plate 108: Right guide plate 110: Guide member 110a: Wire passage 112: Top plate 112a: Projection part 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 part 150e: Tip rib 150f: Side rib 152: Push plate 154: Pull plate 156: First link arm 158: Second link arm 160: Oscillation shaft 162: Oscillation shaft 164: Torsion spring 166: Oscillation shaft 168: Oscillation 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 184a: Rigid stopper 186: Elastic stopper 188: Elastic cover 190: Elastic cover 192: Reflector 194: Optical sensor 194a: Light emission Part 194b: Light receiving part 200: Control board

Claims (7)

A binding machine having a feeding mechanism,
The feed mechanism is
A feed roller that feeds the binding wire,
A feed motor for rotating the feed roller,
A cover having a through hole, which is arranged between the feed roller and the feed motor,
A restraint member that restrains the movement of dust from the feed roller side to the feed motor side through the through hole. The binding machine according to claim 1, further comprising a rotation transmission mechanism that transmits the rotation of the feed motor to the feed roller via the through hole. The binding machine according to claim 1 or 2, wherein the suppressing member is a dustproof bearing. 4. The feed mechanism according to claim 1, further comprising a reduction mechanism that is arranged on the feed motor side when viewed from the cover and that reduces the rotation of the feed motor and transmits the rotation to the feed roller. Item binding machine. The binding machine according to claim 1, wherein at least the feed roller, the feed motor, the cover, and the suppressing member are unitized. The feed mechanism is disposed on the feed roller side when viewed from the cover, and further includes a guide member that guides the binding line to the feed roller,
6. The binding machine according to claim 1, wherein the guide member is fixed to the cover so as to prevent the suppressing member from coming off the cover. The guide member includes an insertion hole that guides the binding wire,
7. The binding machine according to claim 6, wherein an inlet of the insertion hole opens at least toward a side opposite to the cover side when viewed from the guide member.

Images