JP2018091105A - Binding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing bar binding machine capable of reliably stopping a wire reel at a desired timing with a simple structure.SOLUTION: The reinforcing bar binding machine includes a brake part 6Afor restricting rotation of a wire reel 20 by pushing the wire reel 20 housed in a housing 2A from one end side in an axial direction. When the brake part 6Amoves to a braking position, the end part 69Aof the brake part 6Apushes one end part 20aof a hub part 20a of the wire reel 20. With this, when the brake part 6Amoves to the braking position in a state the wire reel 20 is rotating, a frictional force is generated between the end part 69Aof the brake part 6Aand the end part 20aof the wire reel 20, and the rotation of the wire reel 20 is braked.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a binding machine that binds bundles such as reinforcing bars with wires.

  Conventionally, a binding machine called a reinforcing bar binding machine that winds a wire around a reinforcing bar and binds a plurality of reinforcing bars by twisting the wire has been proposed.

  Conventionally, in this type of reinforcing bar binding machine, a wire is fed from a wire reel by a feeding means, and the fed wire is curled so as to surround the periphery of the reinforcing bar in a curl forming portion. When the wire feed of a predetermined length is performed, the wire feed is stopped, and the wires are twisted and bound so that the reinforcing bars are tightened by the twisting means. At this time, since the wire reel continues to rotate due to inertia even after the wire feeding is stopped, a braking means for applying braking to the rotation of the wire reel is provided to restrict the rotation of the wire reel.

  The reinforcing bar binding machine described in Patent Document 1 has a braking portion that can be engaged with a saw blade-like engaging portion formed on the outer periphery of the flange portion of the wire reel, and engages the braking portion with the engaging portion. Thus, the rotation of the wire reel is stopped. The braking unit includes a stopper lever that engages with the flange portion of the wire reel, a shaft that has one end connected to the stopper lever, and the other end connected to a solenoid that is driving means via a connecting wheel and a link, and the shaft rotates. Brackets and bearings that can be supported are provided.

Japanese Patent No. 5369846

  In the conventional reinforcing bar binding machine, when the wire reel is stopped, the braking part does not engage well with the saw-tooth engaging part, and there is a possibility that the timing for stopping the wire reel is delayed. Further, in order to engage the braking portion with the engaging portion of the flange portion, a connecting lever, a link, a shaft, a bracket, a bearing and the like are required in addition to the stopper lever and the solenoid, and the apparatus becomes complicated.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a binding machine that can reliably stop a wire reel at a desired timing without complicating the apparatus.

  In order to solve the above-described problems, the present invention is sent by a receiving unit that rotatably accommodates a cylindrical wire reel around which a wire is wound, a feeding unit that feeds a wire wound around the wire reel, and a feeding unit. A curl forming part for curling the wire along the periphery of the bundle, a bundling part for binding the bundle by twisting the wire curled by the curl forming part, and pressing the wire reel from one end side in the axial direction It is a binding machine including a braking unit that brakes the rotation of the wire reel.

  In addition, the present invention provides a housing portion that rotatably accommodates a cylindrical wire reel around which a wire is wound, a feeding portion that feeds the wire wound around the wire reel, and a wire fed by the feeding portion around the bundle A curl forming part that curls along the wire, a bundling part that twists a wire curled by the curl forming part and binds a bundle, and a wire reel housed in the housing part is pressed from one end in the axial direction. The binding machine includes a braking unit that brakes the rotation of the wire reel by pressing the other end side of the wire reel in the axial direction against the inner wall of the housing unit.

  Furthermore, the present invention provides a housing portion that rotatably accommodates a cylindrical wire reel around which a wire is wound, a feeding portion that feeds the wire wound around the wire reel, and a wire fed by the feeding portion around the bundle. A curl forming part that curls along the wire, a bundling part that twists the wire curled by the curl forming part to bind the bundle, and a concave part that is inserted into the concave part formed along the axial direction of the wire reel. A braking portion configured to be displaceable between a first position at which the inner surface is pressed and a second position that is not pressed against the inner surface, and the braking portion between the first position and the second position. It is a binding machine provided with the drive part to displace.

  In the present invention, the rotating wire reel is pressed and stopped from one end side in the axial direction, or is pressed from one end side in the axial direction and the other end side in the axial direction is pressed against the inner wall of the housing portion and stopped. Alternatively, since the braking portion is pressed against the inner surface of the recess formed along the axial direction of the wire reel and stopped, the wire reel can be reliably stopped by the frictional force at the time of pressing. Further, since the configuration is such that the wire reel is simply pushed from one end side in the axial direction, the number of parts can be reduced and the apparatus is not complicated.

It is the block diagram which looked at the braking part of the reinforcing bar binding machine which concerns on 1st Embodiment from the upper surface. It is the block diagram seen from one side which shows an example of the whole structure of the reinforcing bar binding machine of this Embodiment. The block diagram seen from the upper surface which shows an example of the principal part structure of the reinforcing bar binding machine of this Embodiment It is the block diagram seen from the other side which shows an example of the whole structure of the reinforcing bar binding machine of this Embodiment. It is the block diagram which looked at the braking part of the reinforcing bar binding machine which concerns on 2nd Embodiment from the upper surface. It is the block diagram which looked at the braking part of the reinforcing bar binding machine which concerns on 3rd Embodiment from the upper surface. It is the block diagram which looked at the braking part of the reinforcing bar binding machine which concerns on 3rd Embodiment from the upper surface. It is the block diagram which looked at the braking part of the reinforcing bar binding machine which concerns on 3rd Embodiment from the upper surface. It is the block diagram which looked at the braking part of the reinforcing bar binding machine which concerns on 4th Embodiment from the upper surface. It is the block diagram which showed the braking part of the reinforcing bar binding machine which concerns on 3rd Embodiment in detail. It is the block diagram which showed the braking part of the reinforcing bar binding machine which concerns on 3rd Embodiment in detail. It is the block diagram seen from the upper surface which shows the structural example of the braking device of the reinforcing bar binding machine which concerns on 4th Embodiment. The block diagram which shows an example of the braking device of the reinforcing bar binding machine which concerns on 5th Embodiment, It is a block diagram which shows an example of a wire reel. It is the block diagram seen from the upper surface which shows an example of the brake part of other embodiment. It is the block diagram seen from the front which shows another example of the brake part of other embodiment. It is a principal part perspective view which shows another example of the brake part of other embodiment.

  Hereinafter, an example of a reinforcing bar binding machine as an embodiment of a binding machine of the present invention will be described with reference to the drawings.

<Configuration example of reinforcing bar binding machine of the present embodiment>
FIG. 1 is a configuration diagram of the braking unit of the reinforcing bar binding machine according to the first embodiment as viewed from above. Moreover, FIG. 2 is a configuration diagram viewed from one side showing an example of the overall configuration of the reinforcing bar binding machine of the present embodiment, and FIG. 3 shows an example of the main configuration of the reinforcing bar binding machine of the present embodiment. FIG. 4 is a configuration diagram viewed from the top, and FIG. 4 is a configuration diagram viewed from another side showing an example of the overall configuration of the reinforcing bar binding machine of the present embodiment.

  First, an outline of the reinforcing bar binding machine 1A of the present embodiment will be described with reference to FIGS. In the following description, the side where the handle portion 10a is provided with respect to the binding machine body 10 of the reinforcing bar binding machine 1A is the lower side, and the side opposite to the handle portion 10a is the upper side.

  Reinforcing bar binding machine 1A is a wire that feeds wire W wound around wire reel 20 accommodated in wire reel 20 accommodated in wire reel 20 accommodated in wire reel 20 that accommodates wire reel 20 wound with one or more wires. A feeding unit 3A is provided. Further, the reinforcing bar binding machine 1A includes a curl forming part 4A that curls the wire W fed by the wire feeding part 3A and winds it around the reinforcing bar S, and a binding part 5A that twists the wire W wound around the reinforcing bar S. .

  The reinforcing bar binding machine 1A feeds the wire W wound around the wire reel 20 by the wire feeding part 3A and winds it around the reinforcing bar S while bending (curling) it by the curl forming part 4A.

The reinforcing bar binding machine 1A winds the wire W around the reinforcing bar S, and then grips and twists the wire W with the binding part 5A. Thereby, the reinforcing bar S is bound by the wire W. Reinforcing bar binding machine 1A is, after the feeding operation of the wire W at the wire feed unit 3A has been completed, restricting the rotation of the wire reel 20 by the braking portion 6A ₁ shown in FIG. 1 (braking) to.

  A wire reel 20 used in the reinforcing bar binding machine 1A will be described with reference to FIGS. The wire reel 20 has a cylindrical hub portion 20a around which the wire W is wound, and the axial direction of the hub portion 20a (the axial direction of the hub portion 20a in the rotation operation of the wire reel 20; hereinafter, it may be simply referred to as “axial direction”). A pair of flange portions 20b provided on both ends. The flange portion 20b is a substantially circular plate-like member having a diameter larger than the diameter of the hub portion 20a and expanding radially from both ends in the axial direction of the hub portion 20a. At one end in the axial direction of the hub portion 20a, a concave fitting hole portion 20m to be fitted into a reel holder 60M described later is formed. Further, a concave hole portion 20e into which a support shaft 21b of a reel support portion 21 described later is inserted is formed at the other end portion in the axial direction of the hub portion 20a.

  Next, the accommodating part 2A to which the wire reel 20 is attached will be described. The housing portion 2A includes a concave portion 22 formed in the binding machine body 10 (outer wall thereof) and a reel support portion 21 provided so as to be openable and closable with respect to the concave portion 22. A space for accommodating the wire reel 20 is formed. The accommodating portion 2A includes a reel holder 60M for supporting the wire reel 20 on the wall surface of the concave portion 22 facing the reel support portion 21. The reel holder 60M is arranged so that it can be inserted into the fitting hole 20m of the hub portion 20a when the wire reel 20 is accommodated. The reel holder 60M is formed in a convex cylindrical shape in accordance with the shape of the fitting hole 20m.

  The reel support portion 21 opens and closes with a shaft 21a provided in the binding machine body 10 as a fulcrum. The reel support portion 21 has a support shaft 21b that supports the wire reel 20 from a position opposite to the reel holder 60M. The support shaft 21b protrudes from the reel support portion 21 and is configured to be inserted into the hole portion 20e of the hub portion 20a when the reel support portion 21 is closed. The support shaft 21 b is formed in a convex cylindrical shape in accordance with the shape of the hole 20 e of the wire reel 20.

  When the wire reel 20 is accommodated in the accommodating portion 2A, the reel support portion 21 is opened, the fitting hole 20m of the wire reel 20 is fitted into the reel holder 60M, and the wire reel 20 is set on the wire reel 60M. Then, the reel support portion 21 is closed, and the reel support portion 21 is locked in a closed state by a lock mechanism (not shown). By closing the reel support portion 21, the support shaft 21b is inserted into the hole 20e of the wire reel 20, and the wire reel 20 is rotatably supported by the reel holder 60M and the support shaft 21b. When taking out the wire reel 20 from the housing portion 2A, the reel support portion 21 is opened again, and the wire reel 20 is removed from the reel holder 60M.

  Next, the wire feeding unit 3A that feeds the wire W will be described. The wire feed portion 3A includes a first feed gear 30L and a second feed gear 30R as a pair of feed members. The first feed gear 30L and the second feed gear 30R are formed on the outer peripheral surface of the disk-shaped member with a groove portion 31 into which the wire W enters along the circumferential direction, and a portion where the groove portion 31 is formed. Is a substantially spur gear having a tooth portion (not shown) formed on the outer peripheral surface.

  The first feed gear 30L and the second feed gear 30R are arranged so as to sandwich the feed path of the wire W, and are configured such that the outer peripheral surfaces face each other. The first feed gear 30L and the second feed gear 30R are urged in a relatively approaching direction by an urging means such as a spring (not shown).

  The wire feed portion 3A is configured such that the tooth portions of the first feed gear 30L and the second feed gear 30R mesh with each other, and driving force is transmitted from one feed gear to the other feed gear. In this example, the driving force is transmitted from the first feed gear 30L to the second feed gear 30R.

  In the wire feed portion 3A, the wire W enters the groove portion 31 of the first feed gear 30L and the second feed gear 30R and is sandwiched between the first feed gear 30L and the second feed gear 30R. The wire W can be fed by rotating the first feed gear 30L and the second feed gear 30R. The wire feeding unit 3A sends the wire W toward the curl forming unit 4A. The first feed gear 30L and the second feed gear 30R are not necessarily limited to spur gears as long as the driving force can be transmitted from one feed gear to the other feed gear.

  Next, a drive unit that drives the first feed gear 30L and the second feed gear 30R with the wire feed unit 3A will be described. The drive unit includes a feed motor (motor) 32 that drives the first feed gear 30L. The output shaft 32b of the feed motor 32 is connected to the first feed gear 30L via a gear 32a, a gear 34, and a rotary shaft 33.

  When the feed motor 32 (the output shaft 32b thereof) rotates, the driving force of the feed motor 32 is transmitted to the first feed gear 30L via the gear 32a, the gear 34, and the rotary shaft 33. When the first feed gear 30L rotates, the second feed gear 30R that meshes with the first feed gear 30L also rotates.

  In the reinforcing bar binding machine 1A, the feed amount of the wire W is detected using the rotation speed of the first feed gear 30L. In this example, since a magnetic sensor is used to detect the rotational speed, a permanent magnet (not shown) is embedded in a gear 33 coaxial with the first feed gear 30L. Therefore, the gear 33 is made of a nonmagnetic resin. On the other hand, in order to transmit a driving force from the first feed gear 30L to the second feed gear 30R, the first feed gear 30L and the second feed gear 30R are made of iron and ensure strength.

  Next, the curl forming portion 4A for winding the wire W around the reinforcing bar S will be described with reference to FIGS. The curl forming unit 4A abuts on the wire W sent by the wire feeding unit 3A, regulates the traveling direction of the wire W, and configures a path that regulates the traveling direction of the wire W so that the wire W curls. The curl forming portion 4A guides the wire W and curls the wire W so that the wire W draws a substantially circle around the reinforcing bar S (curls along the periphery of the reinforcing bar S).

  Next, the binding part 5A for twisting the wire W and binding the reinforcing bars S will be described. The binding portion 5A includes a torsion motor 51, a gear 52, a screw shaft portion 53, an advancing / retracting cylinder portion 54, and a twisting hook 55. As a drive source of the binding unit 5A, a torsion motor 51 that is driven separately from the feed motor 32 is used.

  The screw shaft portion 53 is rotatably supported by the binding machine body 10 and is rotated by the driving force of the torsion motor 51 transmitted through the gear 52. The screw shaft portion 53 is formed with a screw on the outer peripheral surface, and the advance / retreat cylindrical portion 54 is formed with a screw on the inner peripheral surface, so that the screw on the outer peripheral surface of the screw shaft portion 53 becomes the inner peripheral surface of the advance / retreat cylindrical portion 54. Screwed into the screw.

  The binding portion 5A is configured such that the advance / retreat cylinder portion 54 moves back and forth as the screw shaft portion 53 is rotated by the rotation of the torsion motor 51 while the rotation of the advance / retreat cylinder portion 54 is restricted. . Further, the screw shaft portion 53 and the advance / retreat cylinder portion 54 are coupled so as to rotate integrally, so that the advance / retreat tube portion 54 rotates by the rotation of the screw shaft portion 53 caused by the rotation of the torsion motor 51. Is done.

  The torsion hook 55 is a pair of claw-like members attached to the tip of the advance / retreat cylinder portion 54. The torsion hook 55 is configured to open and close in accordance with the advance / retreat operation of the advance / retreat cylinder portion 54 by a known structure.

  The binding unit 5A operates as follows. First, when the trigger 10c of the reinforcing bar binding machine 1A is operated, the wire W is fed by a predetermined amount by the wire feeding part 3A and wound around the reinforcing bar S by the curl forming part 4A. The number of times the wire W is wound around the reinforcing bar S is set according to the feed amount of the wire W.

  Thereafter, the torsion motor 51 rotates forward, and the rotation of the torsion motor 51 is transmitted to the screw shaft portion 53 via the gear 52. At this time, the screw shaft portion 53 rotates, but the advance / retreat cylinder portion 54 is restricted from rotating, so that the advance / retreat cylinder portion 54 is sent forward by the action of the screwed screw. The torsion hook 55 advances to a position where it comes into contact with the wire W when the advance / retreat cylinder portion 54 is sent forward. The torsion hook 55 operates in the closing direction in conjunction with the advancement of the advance / retreat cylinder portion 54 and grips a part of the wire wound in a loop shape.

  The advance / retreat cylinder portion 54 is rotated together with the screw shaft portion 53 with the restriction on rotation being released at a predetermined position where the advance / retreat tube portion 54 has moved forward. The wire W is twisted by rotating the twisting hook 55 holding the wire W. In addition, while the advance / retreat cylinder portion 54 moves forward, a cutter (not shown) is operated to cut the wire W.

  When the twisting operation is completed, the twisting motor 51 rotates in the reverse direction, and the screw shaft portion 53 rotates in the reverse direction. As a result, the forward / backward moving cylinder portion 54 and the twisting hook 55 are also moved rearward, and the twisting hook 55 is opened to release the wire W. The torsion motor 51 rotates in reverse until the advance / retreat cylinder portion 54 and the torsion hook 55 move to the standby position. When the advancing / retreating cylinder portion 54 and the torsion hook 55 move to the standby position, the torsion motor 51 stops and a series of operations is completed.

<Configuration Example of Brake Section of First Embodiment>
As shown in FIGS. 1A and 1B, the reinforcing bar binding machine 1A according to the first embodiment presses the wire reel 20 from one end side in the axial direction to rotate the wire reel 20. comprising a braking portion 6A ₁ to braking. In the present example, the braking portion 6A ₁ presses the surface of the flange portion 20b, more specifically, of the surface of the flange portion 20b, presses the circumference of the slightly inboard of the fitting Goana portion 20c (concave) . Here, the “surface of the flange portion 20b” is a surface (hub portion) opposite to a surface facing the other flange portion 20b provided on the hub portion 20a (a surface facing inward in the axial direction of the hub portion 20a). The surface facing outward in the axial direction of 20a. The surface of the flange portion 20b includes not only a flat portion but also a convex portion protruding by a rib or the like, a concave portion recessed by a fitting hole portion 20c, or the like. That is, the surface of the flange portion 20b means the entire continuous surface regardless of the shape such as irregularities. Further, “pressing the surface of the flange portion 20b” means not only when pressing the entire surface of the flange portion 20b but also when pressing a part of the surface.

Braking portion 6A ₁ is arranged projecting from the recess 22 of the housing part 2A, is driven by a driving unit such as a solenoid (not shown) moves in the axial direction of the wire reel 20. Driver braking portion 6A ₁ which has been moved toward the wire reel 20 by is in contact with the surface of the flange portion 20b, between the braking portion 6A ₁ and the surface of the flange portion 20b by further strengthening the contact A frictional force greater than a predetermined value is generated in the wire reel 20, whereby the wire reel 20 stops rotating. In this embodiment, the braking unit 6A ₁ is a cylindrical member which is disposed so as to surround the periphery of the reel holder 60M shown in FIG. Therefore, the braking portion 6A ₁ which has been moved toward the wire reel 20 from the periphery of the reel holder 60M, to press the surface of (the end) flange portion 20b. Incidentally, the brake unit 6A _1, since it is sufficient to stop the rotation of the wire reel 20 presses the surface of the flange portion 20b, the shape is not limited to the tubular member. For example, the braking portion 6A ₁ may be one or a plurality of plate-like member and the rod-like member or the like arranged around the reel holder 60M.

<Example of the effect of the braking unit of the first embodiment>
FIG. 1 (a), as shown in FIG. 1 (b), the braking unit 6A _1, the end 69A ₁ is in contact with the non-braking position and a wire reel 20 which is not in contact with the wire reel 20 (pressed Move between the braking positions. Braking portion 6A _1, the driving force of the driving portion, moves in the arrow G2 direction by the urging force of the spring or the like, to move to a non-braking position shown in FIG. 1 (a). The braking portion 6A ₁ is in a non-braking position, an end portion 69A ₁ of the braking portion 6A ₁ is away from the surface of the flange portion 20b. Therefore, the braking portion 6A ₁ is to be in a non-braking position, the wire reel 20 is ready to rotate by the feed of the wire W by the wire feed unit 3A.

When moving the braking portion 6A ₁ from the non-braking position to the braking position shown in FIG. 1 (b), it is moved in the arrow G1 braking portion 6A ₁ drives the drive unit from the non-braking position. The braking portion 6A ₁ is moved to the braking position, an end portion 69A ₁ of the braking portion 6A ₁ presses the surface of the flange portion 20b.

The end 69A ₁ of the braking portion 6A ₁ By pressing the surface of the flange portion 20b, the frictional force is generated between the end portion 69A ₁ and the surface of the flange portion 20b of the braking portion 6A _1, the frictional force is given When the value is exceeded, the rotation of the wire reel 20 is braked.

In this embodiment, the braking unit 6A ₁ is driven by the braking unit dedicated drive unit (solenoid or the like), for example, as driven by the torsion motor 51 shown in the feed motor 32 and 4 shown in FIG. 2 Also good.

<Example of Configuration of Braking Section of Second Embodiment> FIG. 5 is a configuration diagram of the braking section of the reinforcing bar binding machine according to the second embodiment as viewed from above. As shown in FIGS. 5A and 5B, the reinforcing bar binding machine according to the second embodiment presses the wire reel 20 from one end side in the axial direction to brake the rotation of the wire reel 20. comprising a braking portion 6A ₂ to. Braking portion 6A _2, unlike the first embodiment, in the surface of the flange portion 20b, pushes the close site on the outer peripheral side of the radially outer than the periphery of the fitting hole portion 20c. In this embodiment, the braking unit 6A ₂ presses the surface two places of the flange portion 20b. Braking portion 6A ₂ is arranged projecting from the recess 22 of the housing part 2A, is driven by a driving unit such as a solenoid (not shown) moves in the axial direction of the wire reel 20. Brake 6A ₂ which has been moved toward the wire reel 20 by the drive unit is in contact with the surface of the flange portion 20b, between the braking portion 6A ₂ and the surface of the flange portion 20b by further strengthening the contact A frictional force greater than a predetermined value is generated in the wire reel 20, whereby the wire reel 20 stops rotating. In this embodiment, the braking portion 6A ₂ of the two rod-shaped, moves towards the wire reel 20, to press the surface two places of the flange portion 20b. Incidentally, the brake unit 6A _2, since it is sufficient to stop the rotation of the wire reel 20 presses the surface of the flange portion 20b, the shape is not limited to the bar-like member. The number of the braking portion 6A ₂ is also not two, may be one or three or more.

Braking portion 6A ₂ moves the non-braking position shown in FIGS. 5 (a) by the drive unit, between a braking position shown in Figure 5 (b).

<Example of the effect of the braking unit of the second embodiment>
The braking portion 6A ₂ is moved by moving the arrow G2 direction by the driving force of the drive unit to the non-braking position, an end portion 69A ₂ of the braking portion 6A _2, the surface 20b of the one flange portion 20b of the wire reel 20 Leave ₁ As a result, the wire reel 20 can be rotated by feeding the wire W by the wire feeding portion 3A.

On the other hand, the braking portion 6A ₂ is and move to the braking position and moved in the arrow G1 direction by the driving force of the driving portion, the end portion 69A ₂ of the braking portion 6A _2, the surface 20b of the one flange portion 20b of the wire reel 20 ₁ is pressed.

The end portion 69A ₂ of the braking portion 6A ₂ by pressing the surface 20b ₁ of the flange portion 20b, the frictional force between the surface 20b ₁ of the end portion 69A ₂ and the flange portion 20b of the braking portion 6A ₂ occurs, the frictional When the force exceeds a predetermined value, the rotation of the wire reel 20 is braked.

Further, the brake unit 6A ₂ is not a dedicated drive unit, may be driven by a torsion motor 51 shown in the feed motor 32 and 4 shown in FIG.

<Configuration Example of Braking Section of Third Embodiment>
6, 7, and 8 are configuration diagrams of the braking unit of the reinforcing bar binding machine according to the third embodiment as viewed from above. As shown in FIGS. 6 and 8, the reinforcing bar binding machine according to the third embodiment presses the wire reel 20 from one end side in the axial direction to brake the rotation of the wire reel 6A _3, 6A. ₅ is provided. The braking portions 6A _{3 and} 6A ₅ are configured by reel holders 60A _{3 and} 6A ₅ that are movable in the axial direction, and are configured to be able to press at least a part of the inner surface of the fitting hole portion 20c by movement. The braking portion _6A 3, 6A ₅ by pressing the inner surface of the fitting hole 20c, the rotation of the wire reel 20 by the frictional force generated between the inner surface of the braking portion _6A 3, 6A ₅ and fitting holes 20c It can be braked.

Brake 6A ₃ shown in FIG. 6, the pressing configured to allow the bottom surface 20h ₃ of the fitting hole portion 20c. In this embodiment, the frictional force of a predetermined value or more between the tip portion 69a ₃ and the bottom surface 20h ₃ of the fitting hole portion 20c of the braking portion 6A ₃ presses the brake unit 6A ₃ on the bottom surface 20h ₃ of the fitting hole portion 20c Is generated so that the rotation of the wire reel 20 can be stopped. Further, the braking portion 6A ₅ shown in FIG. 8 is tapered shape as the diameter decreases toward the tip (tapered), fitting hole 20c of the brake unit 6A ₅ is inserted also go to the back of the hole It has a tapered shape (tapered shape) with a smaller diameter. Then, according to the braking portion 6A ₅ is gradually inserted into the fitting hole portion 20c, the frictional force between the inner peripheral 20i ₅ of the outer circumference 69a ₅ and the fitting hole portion 20c of the braking portion 6A ₅ is increased gradually Configured as follows. Therefore, the braking portion 6A ₅ is inserted to a predetermined depth into the fitting hole portion 20c, the wire reel 20 is adapted to the braking by the friction force between the braking portion 6A ₅ and the fitting hole portion 20c. Incidentally, the braking portion 6A ₅ is driven by a driving unit such as a solenoid (not shown), a non-braking position (FIG. 6 (a), the to FIG. 8 (a)) and the braking position (FIG. 6 (b), the FIG. 8 (b)) Is moved in the same manner as in the first and second embodiments.

Similar to brake the braking part 6A ₄ shown in FIG. 7 also shown in FIGS. 6 and 8, and a reel holder 60A ₄ is, the brake unit 6A ₄ is alternatively moved in the axial direction of the wire reel 20, or Along with the movement in the axial direction, it can also move in the lateral direction (arrow G3 direction) perpendicular to the axial direction. By moving the brake unit 6A ₄ in the transverse direction, the side surface 69a ₄ of the brake 6A ₄ comes to abut against the side walls 20h ₄ of the fitting hole portion 20c. Therefore, friction between the side surfaces 69a ₄ of the braking portion 6A ₄ By strongly pressing on the side wall 20h ₄ of the fitting hole portion 20c, the side surface 69a ₄ and the side wall 20h ₄ of the fitting hole portion 20c of the braking portion 6A ₄ The rotation of the wire reel 20 can be stopped by the force. Incidentally, the brake unit 6A ₄ is driven by a driving unit such as a solenoid, not shown.

Brake 60A ₄ moves the non-braking position shown in FIG. 7 (a) by the drive unit, between a braking position shown in FIG. 7 (b).

Brake 6A ₄ is, when it moves in the arrow G4 direction by the driving unit to move to a non-braking position, the side surface 69a ₄ of the braking portion 6A ₄ moves away from the side wall 20h ₄ of the fitting hole portion 20c. As a result, the wire reel 20 can be rotated by feeding the wire W by the wire feeding portion 3A.

On the other hand, when the brake unit 6A ₄ is moved in the arrow G3 direction by the drive unit and moved to the brake position, the side surface 69a ₄ of the brake unit 6A ₄ presses the side wall 20h ₄ of the fitting hole 20c.

The side 69a ₄ of the braking portion 6A ₄ by pressing the side wall 20h ₄ of the fitting hole portion 20c, the frictional force between the side wall 20h ₄ sides 69a ₄ and the fitting hole portion 20c of the braking portion 6A ₄ occurs, The rotation of the wire reel 20 is braked.

Incidentally, the brake unit 6A ₄ is not a dedicated drive unit, may be driven by a torsion motor 51 shown in the feed motor 32 and 4 shown in FIG.

<Configuration Example of Braking Section of Fourth Embodiment>
FIG. 9 is a configuration diagram of the braking portion of the reinforcing bar binding machine according to the fourth embodiment as viewed from above. As shown in FIGS. 9A and 9B, the reinforcing bar binding machine according to the fourth embodiment presses the wire reel 20 from one end side in the axial direction, and the other end side of the wire reel 20. comprising a braking portion 6A ₆ pressed against the inner wall 200 of the housing part 2A to. Braking portion 6A ₆ in this example is a reel holder axially movable, driven by a drive unit (not shown) such as a solenoid. The braking portion 6A ₆ presses the wire reel 20 shown in FIG. 9A against the inner wall 200 of the housing portion 2A and the wire reel 20 shown in FIG. 9B against the inner wall 200 of the housing portion 2A. Move between braking positions.

In the housing part 2A, the wire reel 20 is supported at one end in the axial direction by a reel holder (braking part 6A ₆ ) and supported at the other end by a support shaft 201. As shown in FIG. A spring 21f is provided at the tip of the shaft 201, and the wire reel 20 is movable in the axial direction by the spring 21f. Accordingly, when the wire reel 20 is pressed with a predetermined force or more from one end side in the axial direction, the wire reel 20 moves toward the inner wall of the housing portion 2A. On the other hand, when the force applied to the wire reel 20 is released, the wire reel 20 returns to the original position by the force of the spring 21f. In the example of FIG. 9 (c), provided the spring 21f to the distal end of the support shaft 201, the bottom surface 20e ₁ of the hole portion 20e of the wire reel 20 has been configured to be pressed, the wire reel 20 in the housing portion 2A The position where the spring 21f is provided is not limited to a specific place as long as it can move in the axial direction.

<Example of the effect of the braking unit of the fourth embodiment>
When the braking portion 6A ₆ is in the non-braking position shown in FIG. 9A, the wire reel 20 is pushed in the direction opposite to the inner wall 200 of the housing portion 2A by the force of the spring 21f. That is, when the braking portion 6A ₆ is in the non-braking position, the wire reel 20 (the other end portion 20a ₂ of the hub portion 20a) is separated from the inner wall 200 of the storage portion 2A. Therefore, when the braking unit 6A ₆ is in the non-braking position, the wire reel 20 is in a rotatable state by feeding the wire W by the wire feeding unit 3A.

The movement of the braking unit 6A _{6 to} the non-braking position (movement in the direction of the arrow G2) may be performed by the driving force of the driving unit, and the braking unit 6A ₆ freely moves without driving the driving unit. It is possible to perform the process by a force that the spring 21f pushes the wire reel 20.

When the braking unit 6A ₆ is moved from the non-braking position to the braking position, the driving unit is driven to move the braking unit 6A ₆ from the non-braking position in the direction of the arrow G1. When the braking portion 6A ₆ moves to the braking position, the end portion 69A ₆ of the braking portion 6A ₆ presses _one end portion 20a ₁ of the hub portion 20a of the wire reel 20.

Brake 6A ₆ is by pressing the wire reel 20 in the axial direction, the wire reel 20 is moved toward the inner wall 200 side of the housing part 2A while compressing the spring 21f. When braking the wire reel 20 moves the braking portion 6A ₆ to the other end portion 20a ₂ of the hub portion 20a of the wire reel 20 is pressed against the inner wall 200 of the housing portion 2A.

By the other end 20a ₂ of the hub portion 20a of the wire reel 20 is pressed against the inner wall 200 of the housing portion 2A, the frictional force between the inner wall 200 of the end portion 20a ₂ and the accommodating portion 2A is produced, the wire The rotation of the reel 20 is braked.

  Note that the inner wall of the accommodating portion 2A against which the wire reel is pressed is not limited to the wall as shown in FIG. 9, and includes, for example, a shaft or a rib protruding from the wall. That is, the inner wall of the housing portion 2A includes all surfaces facing the wire reel 20 regardless of a convex surface (or a concave surface) when it is a flat surface. Therefore, for example, the wire reel 20 may be pressed in the G1 direction so that the other end of the wire reel 20 is pressed against the surface of the shaft instead of the wall of the housing portion 2A.

In this example, the braking portion 6A _6, although be driven by the braking unit dedicated drive unit (solenoid or the like), driven for example at a feed motor 32 and the torsion motor 51 shown in FIG. 4 shown in FIG. 2 You may do it. Further, in this embodiment, the braking portion 6A ₆ to serve as the reel holder, and configured to reel holder presses the wire reel 20. That is, the reel reel is moved in the axial direction to press the wire reel 20 against the wall surface of the housing portion 2A. In contrast, the braking portion 6A ₆ may be provided separately from the reel holders. For example, the braking portion 6A ₆ additionally placed around the reel holder may be configured to press the wire reel 20 from the periphery of the reel holder. Thus, as long as the wire reel 20 can be pressed against the wall surface of the housing portion 2 </ b> A, the braking portion 6 </ b> A ₆ may press any position of the wire reel 20.

<Configuration Example of Braking Device of Third Embodiment>
FIGS. 10 and 11 are configuration diagrams showing in more detail the braking portion of the reinforcing bar binding machine according to the third embodiment. 10, braking device 600A shown in FIG. 11 is an example of the braking portion 6A ₁ described in FIG. 6, by utilizing the frictional force between the reel holder 60A and the wire reel 20, the rotation of the wire reel 20 Brake. For this reason, the reel holder 60A constitutes the braking portion 6A.

  First, the configuration of the wire reel 20 will be described. In the wire reel 20, a concave fitting hole 20c that is fitted to the reel holder 60A is formed at one end in the axial direction of the hub portion 20a. The fitting hole 20c is an example of a recess, and the inner peripheral surface is formed in a cylindrical shape. Further, the wire reel 20 is formed with a concave hole portion 20e into which a support shaft 21b of a reel support portion 21 described later is inserted at the other end portion in the axial direction of the hub portion 20a. The hole 20e is an example of a recess, and the inner peripheral surface is formed in a cylindrical shape.

  Next, the accommodating part 2A in which the wire reel 20 is accommodated will be described. The housing portion 2A includes a concave portion 22 formed in the binding machine body 10 (outer wall thereof) and a reel support portion 21 provided so as to be openable and closable with respect to the concave portion 22. The concave portion 22 and the reel support portion 21 A space for accommodating the wire reel 20 is formed. The accommodating portion 2A includes a reel holder 60A on the wall surface of the recess 22 facing the reel support portion 21. The reel holder 60A is an example of a reel shaft portion, and is disposed so as to be inserted into the fitting hole portion 20c of the hub portion 20a when the wire reel 20 is accommodated. In the reel holder 60A, the part inserted into the fitting hole 20c is formed in a convex cylindrical shape in accordance with the shape of the fitting hole 20c. When the fitting hole 20c of the wire reel 20 is fitted into the reel holder 60A, the wire reel 20 can rotate with respect to the reel holder 60A. The reel holder 60 </ b> A is moved in the axial direction of the wire reel 20 by a drive unit described later.

  The reel support portion 21 opens and closes with a shaft 21a provided in the binding machine body 10 as a fulcrum. The reel support portion 21 has a support shaft 21b that supports the wire reel 20 from a position opposite to the reel holder 60A. The support shaft 21b protrudes from the reel support portion 21 and is configured to be inserted into the hole portion 20e of the hub portion 20a when the reel support portion 21 is closed. The support shaft 21 b is formed in a convex cylindrical shape in accordance with the shape of the hole 20 e of the wire reel 20. When the support shaft 21b is inserted into the hole 20e of the wire reel 20, the wire reel 20 can rotate with respect to the support shaft 21b.

  When the wire reel 20 is accommodated in the accommodating portion 2A, the reel support portion 21 is opened, the fitting hole 20c of the wire reel 20 is fitted into the reel holder 60A, and the wire reel 20 is set in the wire reel 60A. Then, the reel support portion 21 is closed, and the reel support portion 21 is locked in a closed state by a lock mechanism (not shown). By closing the reel support portion 21, the support shaft 21b is inserted into the hole 20e of the wire reel 20, and the wire reel 20 is rotatably supported by the reel holder 60A and the support shaft 21b. When taking out the wire reel 20 from the housing portion 2A, the reel support portion 21 is opened again, and the wire reel 20 is removed from the reel holder 60A. In addition, in this Embodiment, 2 A of accommodating parts were provided in the binding machine main body 10, However, You may provide in the position different from the binding machine main body 10 (position distant from the binding machine main body 10).

  Next, details of the braking device 600A will be described. The braking device 600 </ b> A includes a solenoid 68 that moves the reel holder 60 </ b> A along the axial direction of the wire reel 20 in order to press the reel holder 60 </ b> A against the wire reel 20.

  The solenoid 68 is an example of a drive unit, and the reel holder 60A is fixed to the mover 68a. The solenoid 68 is a type of solenoid in which the iron core protrudes when energized. When the solenoid 68 is energized, the mover 68a is driven by the electromagnet 68b to move in the arrow G1 direction. An arrow G1 is a direction in which the reel holder 60A fixed to the mover 68a approaches the reel support portion 21. Further, the mover 68a moves in the direction of arrow G2 by the force of the spring 68c. An arrow G2 is a direction in which the reel holder 60A fixed to the mover 68a is separated from the reel support portion 21.

  As a result, when the solenoid 68 is energized, the reel holder 60A moves in the direction of the arrow G1 by a force such as a magnet attracting force. Further, when the solenoid 68 is de-energized, the reel holder 60A is moved in the arrow G2 direction by the force of the spring 68c.

  When the reel holder 60A is fitted in the fitting hole 20c of the wire reel 20 and the solenoid 68 is energized with the wire reel 20 attached to the reel holder 60A, the reel holder 60A moves in the direction of arrow G1. When the reel holder 60A moves in the direction of arrow G1, the reel holder 60A pushes the wire reel 20 from one end side in the axial direction. In this example, the end portion 69 of the reel holder 60 </ b> A pushes one side end portion 20 f of the hub portion 20 a that is one side end portion of the wire reel 20.

  The wire reel 20 is connected to the other side end portion of the wire reel 20, in this example, the end portion 20 g which is the bottom surface of the fitting hole portion 20 c and the end portion 21 c of the support shaft 21 b, so When 20 is pushed from one end side in the axial direction, movement in the axial direction is restricted. Accordingly, when the end portion 69 of the reel holder 60A presses the side end portion 20f of the wire reel 20 while the wire reel 20 is rotating, the end portion 69 of the reel holder 60A and the side end portion 20f of the wire reel 20 are pressed. A frictional force is generated between the two and the rotation of the wire reel 20 can be stopped.

  As described above, a state in which one side end portion 20f of the wire reel 20 is pressed by the end portion 69 of the reel holder 60A along the axial direction of the wire reel 20 is referred to as a braking state. The position of the reel holder 60A in the braking state is referred to as a braking position.

  When the energization of the solenoid 68 is stopped and the reel holder 60A is moved in the direction of the arrow G2 from the braking position by the force of the spring 68c, the end portion 69 of the reel holder 60A becomes one side end portion 20f of the hub portion 20a of the wire reel 20. Pressing is released.

  As described above, a state in which the end 69 of the reel holder 60A is released from pressing the one side end 20f of the wire reel 20 is referred to as a non-braking state. Further, the position of the reel holder 60A in the non-braking state is referred to as a non-braking position.

  In the braking device 600 </ b> A, the solenoid 68 is controlled by the control unit 100. The control unit 100 controls the rotation and stop of the feed motor 32 by operating the trigger 10c shown in FIG. Further, the control unit 100 controls the solenoid 68 at a predetermined timing in accordance with the timing of rotating the feed motor 32, and moves the reel holder 60A to the non-braking position. Further, the control unit 100 controls the solenoid 68 at a predetermined timing in accordance with the timing at which the feed motor 32 is stopped, and moves the reel holder 60A to the braking position.

<Operation Example of Braking Device of Third Embodiment>
Next, the operation of the braking device 600A will be described with reference to the drawings. In the operation of feeding the wire W with the first feed gear 30L and the second feed gear 30R, the control unit 100 rotates the feed motor 32 in the direction indicated by the arrow f1, as shown in FIG. And the first feed gear 30L rotates in the arrow f2 direction. Further, the current is not passed through the solenoid 68, and the reel holder 60A is moved to the non-braking position. By moving the reel holder 60A to the non-braking position, as shown in FIG. 10, the non-braking state in which the end 69 of the reel holder 60A is released from pressing the one side end 20f of the wire reel 20 is achieved. Become. Therefore, the wire reel 20 can be rotated. As a result, the wire W is fed by the first feed gear 30L and the second feed gear 30R, and the wire reel 20 rotates in the direction indicated by the arrow f by feeding the wire W.

  In the operation of stopping the feeding of the wire W after feeding the wire W by a predetermined amount, the control unit 100 stops the rotation of the feed motor 32 in the direction of the arrow f1 and matches the timing of stopping the rotation of the feed motor 32. Thus, the solenoid 68 is energized with a predetermined braking signal, the reel holder 60A is moved to the braking position, and the rotation of the wire reel 20 that is about to rotate by inertia is controlled by stopping the feeding of the wire W.

  As shown in FIG. 11, when the reel holder 60 </ b> A is moved to the braking position by energizing the solenoid 68, the end 69 of the reel holder 60 </ b> A is pivoted on one side end 20 f of the hub 20 a of the wire reel 20. Push in the direction.

  Accordingly, the rotation of the wire reel 20 is restricted by the frictional force between the end 69 of the reel holder 60A and the side end 20f of the wire reel 20. Therefore, after the rotation of the feed motor 32 is stopped, the wire W 20 is rotated by inertia, thereby preventing the wire W from being loosened.

  In the conventional reinforcing bar binding machine, a plurality of engaging portions and protruding portions are alternately formed in a substantially saw-tooth shape along the circumferential direction on the outer periphery of the flange portion of the wire reel, and the braking member is used as the flange portion of the wire reel. By displacing in the approaching direction, the braking member is engaged with the engaging portion, and the rotation of the wire reel is stopped.

  For this reason, if it act | operates at the timing which a braking member enters into an engaging part, a braking member can engage with an engaging part. On the other hand, when the brake member is operated at a timing at which it comes into contact with or near the protruding portion, the braking member is repelled by the protruding portion by the rotating force of the wire reel, and the braking member is displaced away from the flange portion of the wire reel. there is a possibility. As a result, the braking member cannot be engaged with the engaging portion, and there is a possibility that the timing for restricting the rotation of the wire reel by the braking member may be delayed.

  On the other hand, in the reinforcing bar binding machine 1A of the present embodiment, the reel holder 60A to which the wire reel 20 is attached presses the wire reel 20 from one end side in the axial direction, thereby rotating the wire reel 20 in the rotating direction. Thus, a load due to friction is applied to restrict the rotation of the wire reel 20.

  As a result, a state in which the rotation of the wire reel cannot be regulated occurs due to the braking member being repelled by the rotating force of the wire reel, as in the conventional configuration in which the braking member is engaged with the uneven portion. There is nothing. Accordingly, the rotation of the wire reel 20 can be restricted at a desired timing by the control of the brake motor 61.

  In the reinforcing bar binding machine 1A, in the operation of twisting the wire W in the binding portion 5A, the load applied to the twisting motor 51 increases as the number of times of twisting the wire W increases. Therefore, the load fluctuation of the torsion motor 51 is detected by the increase / decrease of the current flowing through the torsion motor 51, and the timing for ending the operation of twisting the wire W is controlled.

  Therefore, in the conventional reinforcing bar binding machine that operates the braking member that restricts the rotation of the wire reel 20 by the driving force of the torsion motor 51, the wire W is caused by the load variation of the torsion motor 51 by operating the braking member. There is a possibility of erroneously detecting the timing of ending the operation of twisting.

  On the other hand, in the reinforcing bar binding machine 1A of the present embodiment, the solenoid 68 dedicated to the braking device 600A is used instead of the torsion motor 51 to operate the braking device 600A, so that the operation of braking the wire reel 20 is performed. The operation of twisting the wire W is not affected.

FIG. 12: is the block diagram seen from the upper surface which shows the structural example of the braking device of the reinforcing bar binding machine which concerns on 4th Embodiment. In the braking apparatus 600A ₂ variation, by moving the reel holder 60A to the braking position, to press the wire reel 20 from one end side in the axial direction, the reel and the other end side in the axial direction of the wire reel 20 support 21 The rotation of the wire reel 20 is braked by pressing against the inner wall.

  In this example, when the wire reel 20 is pressed from one end side in the axial direction by providing the convex portion 21d on the inner wall facing the wire reel 20 of the reel support portion 21 and moving the reel holder 60A to the braking position, The flange portion 20b on the other end side of the wire reel 20 is configured to be pressed by the convex portion 21d.

<Configuration Example of Braking Device of Fifth Embodiment>
FIG. 13 is a configuration diagram illustrating an example of a braking device for a reinforcing bar binding machine according to a fifth embodiment, and FIG. 14 is a configuration diagram illustrating an example of a wire reel. First, the wire reel 20M braked with the braking device 600B of 5th Embodiment is demonstrated. The wire reel 20M includes a cylindrical hub portion 20Ma around which the wire W is wound, and a pair of flange portions 20Mb provided at both axial ends of the hub portion 20Ma. The flange portion 20Mb has a diameter larger than the diameter of the hub portion 20Ma, and projects in the radial direction from both axial ends of the hub portion 20Ma.

In the wire reel 20M, a concave fitting hole 20Mc to be fitted into a reel holder 65 described later is formed at an end of the hub portion 20Ma in the axial direction. Fitting hole 20Mc along the circumferential direction of the inner peripheral surface, the convex portion 20Md ₁ and the recess 20Md ₂ are alternately formed.

Further, the reel holder 65 is formed of a shape to be fitted into the fitting hole portion 20Mc of the wire reel 20M shown in FIG. 14, the recess 65b ₁ to fit convex portion 20Md ₁ of the fitting hole portion 20Mc, fitting hole The convex portions 65b ₂ that fit into the ₂₀ Mc concave portions 20Md ₂ are alternately formed along the circumferential direction of the outer peripheral surface.

  Thereby, when the wire reel 20M is attached to the reel holder 65, the wire reel 20M is supported non-rotatably with respect to the reel holder 65 by the uneven shape of the reel holder 65 and the fitting hole 20Mc. Therefore, the wire reel 20 rotates with the reel holder 65. The reel holder 65 has a substantially cylindrical shape and has a space inside.

  The braking device 600 </ b> B has a braking member 66 that restricts the rotation of the reel holder 65. The braking member 66 is inserted into the inner space of the reel holder 65 and faces the braking surface 65a that constitutes a part of the inner surface (inner wall) of the inner space of the reel holder 65 (in this example, the side surface of the inner surface). Is provided. The braking member 66 is configured to be displaceable between a first position that presses the braking surface 65a and a second position that is separated from the braking surface 65a. When the braking member 66 is in the second position, the reel holder 65 is not restricted from rotating by the braking member 66, so that the wire reel 20 can rotate with the reel holder 65 (non-braking state). On the other hand, when the braking member 66 moves to the first position and presses the braking surface 65a of the reel holder 65, a frictional force is generated between the braking member 66 and the braking surface 65a, and the wire reel rotates. It becomes a restricted state (braking state).

  The braking member 66 is displaced between a position in contact with the braking surface 65a and a position away from the braking surface 65a. The brake device 600B is provided with a pair of brake members 66 in this example.

  The braking member 66 is driven by a solenoid 67 that is a driving unit, and moves in both directions of moving toward and away from the braking surface 65a when the mover 67a is displaced. That is, the solenoid 67 is configured to displace the braking member 66 between a first position where the braking surface 65a is pressed and a second position that is separated from the braking surface.

  When the braking member 66 is moved to the first position, the braking device 600B can apply a load to the rotation of the reel holder 65 by the frictional force between the braking member 66 and the braking surface 65a. The rotation of the reel 20M can be regulated by friction.

  In this example, the braking surface 65a is the inner space side surface of the reel holder 65. However, for example, a bottomed cylindrical reel holder may be used and the braking surface may be the inner space bottom surface (end surface or side surface). In this case, the first position is a position where the braking unit presses the bottom surface of the inner space of the reel holder. Therefore, when the brake part is in the first position, the wire reel is braked by the frictional force between the brake part and the inner space bottom surface of the reel holder.

  When the braking member 66 moves to the second position where the braking member 66 moves away from the braking surface 65a of the reel holder 65 and the braking member 66 is not pressed against the braking surface 65a, the braking device 600B feeds the wire W. Following this, the reel holder 65 freely rotates. This state is referred to as a non-braking state.

  The braking device 600B is controlled by the control unit 100B. The controller 100B controls the solenoid 67 so that the braking member 66 is in the second position when the wire reel 20 rotates, and the braking member 66 is in the first position when braking the rotation of the wire reel 20. Thus, the solenoid 67 is controlled. More specifically, the control unit 100B controls the rotation and stop of the feed motor 32 shown in FIG. 2 by operating the trigger 10c shown in FIG. Thus, the solenoid 67 is controlled to move the braking member 66 to the second position away from the braking surface 65a of the reel holder 65, thereby bringing the brake to a non-braking state. Further, the control unit 100B controls the solenoid 67 at a predetermined timing in accordance with the timing at which the feed motor 32 is stopped, and moves the braking member 66 to the first position where the braking member 66 is pressed against the braking surface 65a of the reel holder 65, Set to the braking state.

<Example of operation of braking device of fifth embodiment>
Next, with reference to each figure, operation | movement of the braking device 600B of 5th Embodiment is demonstrated. In the operation of feeding the wire W in the direction of the curl forming unit (forward direction), the control unit 100B rotates the feed motor 32 shown in FIG. In addition, the braking member 66 is separated from the braking surface 65a of the reel holder 65 by the solenoid 67 to be in a non-braking state. Thus, the wire W is fed by the first feed gear 30L and the second feed gear 30R, and the wire reel 20M is rotated in the direction indicated by the arrow f by the feed of the wire W.

  In the operation of stopping the feed of the wire W after feeding the wire W by a predetermined amount, the rotation of the feed motor 32 is stopped and the braking member 66 is reeled by the solenoid 67 in accordance with the timing of stopping the feed motor 32. A braking state in contact with the braking surface 65a of the holder 65 is set, and the rotation of the wire reel 20M that is about to rotate by inertia is restricted by stopping the feeding of the wire W.

  When the braking member 66 is in contact with the braking surface 65a of the reel holder 65, the force acting as a load of rotation of the wire reel 20M in the direction of arrow f due to friction between the braking member 66 and the braking surface 65a is applied to the wire reel. Multiply by 20M.

  Thereby, rotation of the wire reel 20M is regulated. Therefore, after the rotation of the feed motor 32 is stopped, the wire W 20M is rotated by inertia, thereby preventing the wire W from being loosened.

  In the braking device 600B according to the fifth embodiment, the reel holder 65 to which the wire reel 20M is attached has a friction between the braking member 66 and the braking surface 65a as a braking force, and the wire reel 20M rotates in the rotation direction. A load is applied to restrict the rotation of the wire reel 20M. Accordingly, unlike the conventional configuration in which the braking member is engaged with the uneven portion, the rotation of the wire reel 20M can be regulated at a desired timing by the control of the solenoid 67.

  Further, in the braking device 600B according to the fifth embodiment, since the rotation of the wire reel 20M is restricted by the solenoid 67, the operation of braking the wire reel 20M has an influence on the operation of twisting the wire W by the binding portion 5A. There is no effect.

  In the braking device 600B of the second embodiment, the reel holder 65 is configured as a separate component from the wire reel 20M. However, the reel holder 65 may be provided integrally with the hub portion 20Ma of the wire reel 20M. As a recess along the axial direction, a braking surface may be formed on the wire reel itself.

<Configuration example of braking unit according to another embodiment>
FIG. 15 is a configuration diagram viewed from the top showing an example of a braking unit according to another embodiment, and FIG. 16 is a configuration diagram viewed from the front showing still another example of the braking unit according to another embodiment. FIG. 17 is a perspective view of a main part showing still another example of a braking part according to another embodiment.

  The braking unit 6D is an example of a rotating unit and a regulating unit, and includes a braking force transmission unit 64 that transmits the driving force of the feed motor 32 to the reel holder 63 as a braking force.

Reel holder 63 is an example of the reel shaft, is configured in a shape to be fitted into the fitting hole portion 20Mc of the wire reel 20M shown in FIG. 14, the concave portion 63 b ₁ to fit convex portion 20Md ₁ of the fitting hole portion 20Mc, Convex portions 63b ₂ that fit into the concave portions 20Md ₂ of the fitting hole 20Mc are alternately formed along the circumferential direction of the outer peripheral surface.

  Thereby, when the wire reel 20M is attached to the reel holder 63, the wire reel 20M is supported non-rotatably with respect to the reel holder 63 by the uneven shape of the reel holder 63 and the fitting hole 20Mc.

  The braking force transmission unit 64 is an example of a rotation unit, and includes a gear 64a that meshes with the above-described gear 34 that transmits the driving force of the feed motor 32 to the first feed gear 30L, and a gear 64b that is provided coaxially with the gear 64a. The gear 64a and the gear 64b are provided coaxially with the second feed gear 30R. The gear 34 and the gear 64a are constituted by spur gears, and the gear 64b is constituted by a bevel gear.

  The braking force transmission unit 64 includes a gear 64c that meshes with the gear 64b, a gear 64d that is provided coaxially with the gear 64c, and a gear 64e that meshes with the gear 64d. The gear 64c is constituted by a bevel gear, and the gear 64d and the gear 64e are constituted by spur gears.

  Furthermore, the braking force transmission unit 64 includes a brake gear 64f that meshes with the gear 64e. The braking force transmission unit 64 is configured by a combination of a predetermined number of gears so that the brake gear 64f is rotated in a predetermined direction by the rotation of the feed motor 32 that rotates in the direction opposite to the direction in which the wire W is fed in the forward direction. Is done.

  In the braking force transmitting portion 64, the brake gear 64f is supported by the braking shaft 64h via the first one-way bearing 64g, and the reel holder 63 is supported by the braking shaft 64h via the second one-way bearing 64i.

  When the forward rotation of the feed motor 32 that feeds the wire W in the forward direction is transmitted to the brake gear 64f by each gear of the braking force transmission unit 64, the brake gear 64f is moved in the direction of the arrow fb as shown in FIG. Rotate to.

  The one-way bearing transmits a rotation in one direction and does not transmit a rotation in the opposite direction. In this example, when the brake gear 64f rotates in the direction of the arrow fb, the transmission of the driving force to the braking shaft 64h is interrupted by the first one-way bearing 64g, and the braking shaft 64h does not rotate.

  In contrast, when the brake gear 64f rotates in the direction of the arrow rb due to the rotation of the feed motor 32 in the reverse direction, the driving force is transmitted to the braking shaft 64h by the first one-way bearing 64g, and the braking shaft 64h moves in the direction of the arrow rb. Rotate to.

  When the reel holder 63 to which the wire reel 20 is attached rotates in the direction of the arrow fc by feeding the wire W in the forward direction, the transmission of the driving force to the braking shaft 64h is blocked by the second one-way bearing 64i. The braking shaft 64h does not rotate.

  On the other hand, when the feed motor 32 rotates in the reverse direction, the brake gear 64f rotates in the direction of the arrow rb, whereby the driving force is transmitted to the braking shaft 64h by the first one-way bearing 64g, and the braking shaft 64h moves to the arrow. When rotating in the rb direction, the driving force is transmitted to the reel holder 63 by the second one-way bearing 64i, and the reel holder 63 rotates in the arrow rb direction.

  Thereby, in the state where the feed motor 32 is rotating in the forward direction, the brake unit 6D is driven by the feed of the wire W in the forward direction, and the reel holder 63 is freely rotated. That is, it is a rotating part that rotates with the rotation of the wire reel 20M, and this state is referred to as a non-braking state.

  On the other hand, when the brake motor 6D rotates the feed motor 32 in the reverse direction, the load in the direction opposite to the rotation direction of the reel holder 63 driven by the feed of the wire W in the forward direction may be applied to the reel holder 63. The rotation of the wire reel 20 can be restricted by the control of the feed motor 32.

  Accordingly, the rotation restriction of the reel holder 63 can be released and the rotation restriction can be performed by switching the rotation operation for switching the rotation direction of the feed motor 32. The rotation of the wire reel 20 is regulated by the feed motor 32. That is, it is a restricting portion that restricts the rotation of the rotating portion, and this state is referred to as a braking state.

<Operation Example of Brake Section of Other Embodiment>
Next, refer to each figure. The operation of the braking unit 6D according to another embodiment will be described. In the operation of feeding the wire W in the forward direction by the first feed gear 30L and the second feed gear 30R, as shown in FIG. 15, by rotating the feed motor 32 in the forward direction indicated by the arrow f1, the gear 34 and The first feed gear 30L rotates in the arrow f2 direction. As a result, the wire W is fed in the forward direction by the first feed gear 30L and the second feed gear 30R.

  Further, as shown in FIG. 17, the rotation of the feed motor 32 in the positive direction causes the brake gear 64f to rotate in the direction of the arrow fb, but the driving force applied to the braking shaft 64h by the first first one-way bearing 64g. Transmission is interrupted and the brake shaft 64h does not rotate.

  Furthermore, when the reel W 63 to which the wire reel 20M is attached rotates in the direction of the arrow fc by feeding the wire W in the forward direction, transmission of the driving force to the braking shaft 64h is blocked by the second one-way bearing 64i. The braking shaft 64h does not rotate.

  Thus, independently of the forward rotation of the feed motor 32, the reel holder 63 to which the wire reel 20M is attached rotates following the feed of the wire W, and the wire W wound around the wire reel 20M is rotated. Sent. If the winding diameter of the wire W in the wire reel 20M changes by sending the wire W wound around the wire reel 20M, the rotation speed of the wire reel 20M changes.

  On the other hand, the rotation speed of the feed motor 32 is constant. As a result, the rotation of the feed motor 32 in the forward direction is transmitted to the reel holder 63 so that when the rotational speed of the wire reel 20M becomes constant, the amount of the wire W fed from the wire reel 20M changes. On the other hand, the amount of the wire W sent by the first feed gear 30L and the second feed gear 30R is constant. Therefore, problems such as loosening of the wire W or pulling of the wire W between the wire reel 20M and the first feed gear 30L and the second feed gear 30R occur.

  Therefore, by making the rotation of the feed motor 32 in the positive direction and the rotation of the reel holder 63 independent, the wire W loosens between the wire reel 20M and the first feed gear 30L and the second feed gear 30R, or Generation | occurrence | production of malfunctions, such as the wire W being pulled, can be suppressed.

  In the operation of stopping the feeding of the wire W after feeding the wire W by a predetermined amount, after the rotation of the feed motor 32 in the arrow f1 direction is stopped, the feed motor 32 is rotated in the reverse direction indicated by the arrow r1 by a predetermined amount. . When the feed motor 32 is rotated in the arrow r1 direction, the brake gear 64f is rotated in the arrow rb direction by the braking force transmitting portion 64 as shown in FIG. When the brake gear 64f rotates in the direction of the arrow rb, the driving force is transmitted to the braking shaft 64h by the first one-way bearing 64g, and the braking shaft 64h rotates in the direction of the arrow rb.

  When the braking shaft 64h rotates in the direction of the arrow rb, the driving force is transmitted to the reel holder 63 by the second one-way bearing 64i, and a force for rotating the reel holder 63 in the direction of the arrow rb is applied.

  As a result, a force that is a load of rotation of the reel holder 63 in the direction of the arrow f is applied to the reel holder 63. Thereby, rotation of the wire reel 20M is regulated. Therefore, after the rotation of the feed motor 32 is stopped, the wire W 20M is rotated by inertia, thereby preventing the wire W from being loosened.

  In the braking unit 6D according to another embodiment, a load is applied to the reel holder 63 to which the wire reel 20M is attached, using the force that the feed motor 32 tries to rotate as a braking force in the direction in which the wire reel 20M rotates, The rotation of the wire reel 20M is restricted. Accordingly, unlike the conventional configuration in which the braking member is engaged with the uneven portion, the rotation of the wire reel 20M can be regulated at a desired timing by the control of the feed motor 32.

  Further, since the feed motor 32 is used instead of the torsion motor 51 to operate the braking portion 6D, the operation of braking the wire reel 20M does not affect the operation of twisting the wire W.

  In the braking unit 6D, the switching of the rotation operation of switching the rotation direction of the feed motor 32 is performed to release the rotation restriction of the reel holder 63 and to restrict the rotation. Therefore, the braking force transmission unit 64 includes the first one-way bearing 64g. The second one-way bearing 64i is provided. On the other hand, the presence or absence of transmission of the driving force to the reel holder 63 by switching the rotation direction of the feed motor 32 may be switched by one one-way bearing. Further, in the braking unit 6D, the reel holder 63 is configured as a separate component from the wire reel 20M, but may be configured to be provided integrally with the hub unit 20Ma of the wire reel 20M.

DESCRIPTION OF SYMBOLS 1A ... Reinforcing bar binding machine, 10 ... Bundling machine body, 10a ... Handle part, 10c ... Trigger, 10d ... Support shaft part, 2A ... Storage part, 20, 20M ... Wire reel, 20a. 20Ma: Hub portion, 20b, 20Mb ... Flange portion, 20c, 20Mc ... Fitting hole portion, 20Md ₁ ... Convex portion, 20Md ₂ ... Concavity portion, 20e, 20Me ... Hole portion 20f, 20f ₄ ... side end, 20g ... end, 20h ₃ ... bottom, 20h ₄ ... side wall, 20i ₅ ... inner circumference, 21 ... reel support, 21a ... shaft, 21b ... support shaft, 3A ... wire feed, 30L ... first feed gear, 30R ... second feed gear, 31 ... groove, 32 ... Feed motor, 32a ... gear, 33 ... rotary shaft, 34 ... gear, 34a ... hole, 4A ... curl forming part, 5A ... bundling part, 51 ... twist Motor, 52 ... gear, 53 ... screw shaft, 54 ... advanced / retracted cylinder, 55 ... twisting hook, _{A, 6A 2, 6A 3,} 6A 4, 6A 5, 6A 6, 6A 7, 6C, 6D ··· brake, 600A, 600B ··· braking _{device, 60A, 60A 4, 60A 5} , 60A 6, 60A ₇ ... Reel holder (reel shaft), 61 ... Brake motor, 62 ... Braking force transmission unit, 62a, 62b, 62c ... Gear, 63 ... Reel holder (reel shaft), 64 ... braking force transmission part, 64a, 64b, 64c, 64d, 64e ... gear, 64f ... brake gear, 64g ... first one-way bearing, 64h ... braking shaft, 64i・ Second one-way bearing, 65... Reel holder (reel shaft part), 66... Braking member, 67 .solenoid, 67 a .mover, 68 .solenoid, 69, 69 A ₁ . 69 _{2, 69A} 3 ··· end, _69a 4 · · · aspect, _69a 5, ··· periphery, _69a 6 · · · end, W · · · wire

Claims (10)

An accommodating portion for rotatably accommodating a cylindrical wire reel around which a wire is wound;
A feeding section for feeding a wire wound around the wire reel;
A curl forming part for curling the wire sent by the sending part along the periphery of the bundle;
A bundling unit that twists the wire curled by the curl forming unit to bind the bundling object;
A binding machine including a braking unit that presses the wire reel from one end side in the axial direction to brake the rotation of the wire reel.   The braking portion presses a surface of a flange portion provided on one end side in the axial direction of the wire reel, thereby braking the rotation of the wire reel by a frictional force generated between the braking portion and the flange portion. The binding machine according to claim 1.   The brake portion is configured to be insertable into a recess formed along the axial direction of the wire reel, and presses at least a part of the inner surface of the recess to brake the rotation of the wire reel. Binding machine.   The binding machine according to claim 3, wherein the braking portion presses a bottom surface of the inner surface of the recess to brake the rotation of the wire reel.   The binding machine according to claim 3 or 4, wherein the braking unit presses a side surface of the inner surface of the recess to brake the rotation of the wire reel. An accommodating portion for rotatably accommodating a cylindrical wire reel around which a wire is wound;
A feeding section for feeding a wire wound around the wire reel;
A curl forming part for curling the wire sent by the sending part along the periphery of the bundle;
A bundling unit that twists the wire curled by the curl forming unit to bind the bundling object;
Braking that brakes rotation of the wire reel by pressing the wire reel housed in the housing portion from one end side in the axial direction and pressing the other end side in the axial direction of the wire reel against the inner wall of the housing portion Bundling machine with a part. An accommodating portion for rotatably accommodating a cylindrical wire reel around which a wire is wound;
A feeding section for feeding a wire wound around the wire reel;
A curl forming part for curling the wire sent by the sending part along the periphery of the bundle;
A bundling unit that twists the wire curled by the curl forming unit to bind the bundling object;
It is inserted into a recess formed along the axial direction of the wire reel, and is configured to be displaceable between a first position that presses the inner surface of the recess and a second position that does not press the inner surface. A braking part,
A binding machine including a drive unit that displaces the braking unit between the first position and the second position.   The binding machine according to claim 7, wherein the first position is a position where the braking portion presses a bottom surface of the inner surface of the recess.   The binding machine according to claim 7, wherein the first position is a position where the braking portion presses a side surface of the inner surface of the recess.   When the wire reel rotates, the driving unit is controlled so that the braking unit is in the second position, and when braking the rotation of the wire reel, the braking unit is in the first position. The binding machine according to any one of claims 7 to 9, further comprising a control unit that controls the driving unit.

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