JP2024034601A - Binding machine - Google Patents

Abstract

To provide a reinforcement binding machine in which a cover part of a magazine is not opened by being pressed by a reel or a wire.SOLUTION: A reinforcement binding machine 1A comprises: a storage part 21 for storing a reel 20; a magazine 2 having a cover part 22 to openably/closably cover the storage part 21; a lock member 25 capable of moving between a closed position for holding the cover part 22 in a closed state and an open position for being retreated to a position allowing the cover part 22 to open or close; and a regulation part 26 to hold the cover part 22 in a closed state when the lock member 25 moves to the closed position, which causes the cover part 22 to be pressed.SELECTED DRAWING: Figure 1A

Description

This invention relates to a binding machine that binds bundles such as reinforcing bars with wire.

Conventionally, a binding machine called a reinforcing bar binding machine has been proposed, which winds a wire around two or more reinforcing bars and twists the wound wire to bind the two or more reinforcing bars.

A conventional reinforcing bar tying machine has a structure in which a wire is fed by a wire feeding section and wound around a reinforcing bar, and then the wire is twisted and tied. For such a rebar tying machine, the wire is sent in the forward direction and wrapped around the rebar, then the wire is sent in the opposite direction, wrapped around the rebar and cut, and the wire is separated from one end side and the other end. A reinforcing bar tying machine has been proposed that binds reinforcing bars by twisting the portions where their sides intersect (for example, see Patent Document 1).

In the reinforcing bar binding machine described in Patent Document 1, a magazine that accommodates a reel wound with wire is provided with a lock lever that presses the cover from the outside. The lock lever extends along the surface of the cover. Further, the cover is provided with a holding portion that is pressed down by the lock lever.

Patent No. 6763385

Because the wire is wound around the reinforcing steel, the wire is sent in the opposite direction, which can cause the loose wire in the magazine to buckle. If a loose wire inside the magazine buckles, the wire may deform toward the cover and push the cover open.

This may create a gap between the cover and the case in areas that are not pressed down by the lock lever. If a gap occurs between the cover and the case, the reel may move toward the cover in the direction of the axis of rotation by this gap, potentially causing malfunctions.

The present invention has been made to solve such problems, and an object of the present invention is to provide a binding machine that prevents the lid of the magazine from being pushed open by the reel or wire.

In order to solve the above-mentioned problems, the present invention provides a magazine having a storage part in which a reel on which a wire is wound is stored, a lid part that covers the storage part in an openable and closable manner, and a direction in which the wire is pulled out from the magazine and returned to the magazine. A wire feeding section that sends the wire in the opposite direction, a curl forming section that forms a path for winding the wire sent in the forward direction at the wire feeding section around the bundled object, and a wire that is sent in the opposite direction at the wire feeding section and wraps it around the bundled object. This binding machine is equipped with a binding part that twists the tied wires, and a plurality of restriction parts that restrict the lid part that closes the storage part from opening from the closed state.

In the present invention, by restricting the opening of the lid section from the closed state at multiple points, even if the lid section is pushed in the opening direction with a reel or wire, there is a gap between the lid section and the housing section. The occurrence of gaps is suppressed.

The present invention also provides a magazine having a storage part in which a reel on which a wire is wound is stored, a lid part that covers the storage part in an openable and closable manner, and a wire feeder that sends the wire in the forward direction for pulling out the wire from the magazine and in the reverse direction for returning the wire to the magazine. a curl forming section that forms a path for winding the wire sent in the forward direction at the wire feeding section around the bundle; and a curl forming section that forms a path for winding the wire sent in the forward direction at the wire feeding section and wound around the bundle, and This is a binding machine equipped with a binding part that controls the opening of the lid part that closes the storage part from the closed state on the downstream side of the feeding path of the wire that is fed in the positive direction from the axis of rotation of the reel. be.

In the present invention, by restricting the opening of the lid that closes the storage section from the closed state on the downstream side of the feeding path of the wire that is fed in the positive direction from the axis of rotation of the reel, the lid can be prevented from opening from the closed state. Even when pressed by a reel or wire, a gap is prevented from forming between the lid part and the housing part.

According to the present invention, even if the lid is pushed in the opening direction by a reel or a wire, a gap is prevented from forming between the lid and the accommodating portion, and the reel rotates toward the lid within the magazine. Movement in the axial direction is suppressed.

FIG. 1 is a configuration diagram showing an example of the overall configuration of the reinforcing bar binding machine according to the present embodiment, as viewed from the side with a cover removed. FIG. 1 is a configuration diagram showing an example of the overall configuration of the reinforcing bar binding machine according to the present embodiment, as viewed from the front with a cover removed. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram seen from the side which shows an example of the whole structure of the reinforcing bar binding machine of this Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram seen from the front which shows an example of the whole structure of the reinforcing bar binding machine of this Embodiment. It is a side view showing an example of the magazine of this embodiment. It is a perspective view showing an example of a magazine of this embodiment. FIG. 2 is an exploded perspective view showing an example of a regulating section of the present embodiment that regulates a magazine in a closed state. FIG. 2 is an exploded perspective view showing an example of a regulating section of the present embodiment that regulates a magazine in a closed state. FIG. 2 is an exploded perspective view showing an example of a regulating section of the present embodiment that regulates a magazine in a closed state. FIG. 2 is an exploded perspective view showing an example of a regulating section of the present embodiment that regulates a magazine in a closed state. FIG. 3 is a cross-sectional plan view showing an example of a binding part. FIG. 3 is a cross-sectional plan view showing an example of a binding part. It is a perspective view which shows an example of the operation|movement which enables a magazine to be opened and closed. It is a side view which shows an example of the operation|movement which enables a magazine to be opened and closed. It is a perspective view which shows an example of the operation|movement which closes a magazine. It is a side view which shows an example of the operation|movement which closes a magazine.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a reinforcing bar tying machine as an embodiment of the tying machine of the present invention will be described below with reference to the drawings.

<Configuration example of reinforcing bar binding machine of this embodiment>
FIG. 1A is a configuration diagram showing an example of the overall configuration of the reinforcing bar tying machine according to the present embodiment, as viewed from the side with the cover removed. FIG. 1B is a diagram showing an example of the overall configuration of the reinforcing bar tying machine according to the present embodiment. FIG. 2 is a configuration diagram seen from the front with a cover removed. Further, FIG. 2A is a side configuration diagram showing an example of the overall configuration of the reinforcing bar binding machine of this embodiment, and FIG. 2B is a front view showing an example of the overall configuration of the reinforcing bar binding machine of this embodiment. FIG.

The reinforcing bar binding machine 1A sends the wire W in the forward direction indicated by the arrow F, winds it around the reinforcing bar S that is the bundled object, and sends the wire W wound around the reinforcing bar S in the opposite direction indicated by the arrow R. After being fed, wrapped around the reinforcing bars S and cut, the wires W are twisted and the reinforcing bars S are tied together with the wires W.

The reinforcing bar binding machine 1A includes a magazine 2 in which the wire W is accommodated, and a wire feeding section 3 that sends the wire W in order to realize the above-mentioned functions. The reinforcing bar binding machine 1A also includes a curl forming section 5 that forms a path for winding the wire W fed by the wire feeding section 3 around the reinforcing bars S, and a cutting section 6 that cuts the wire W wound around the reinforcing bars S. Be prepared. Further, the reinforcing bar binding machine 1A includes a binding section 7 that twists the wire W wound around the reinforcing bar S, and a drive section 8 that drives the binding section 7.

Moreover, the reinforcing bar binding machine 1A is of a form that is held and used by an operator, and includes a main body part 10 and a handle part 11.

The magazine 2 rotatably and detachably stores a reel 20 in which a long wire W is reeled out. As the wire W, a wire made of a metal wire that can be plastically deformed, a wire in which the metal wire is coated with a resin, or a wire in the form of a stranded wire is used.

In the configuration in which reinforcing bars S are tied together with one wire W, one wire W is wound around a hub portion (not shown) of a reel 20, so that one wire W can be pulled out while the reel 20 rotates. Further, in a configuration in which the reinforcing bars S are tied together using a plurality of wires W, the plurality of wires W are wound around the hub portion, so that the plurality of wires W can be simultaneously pulled out while the reel 20 rotates. For example, in a configuration in which the reinforcing bars S are tied together using two wires W, the two wires W are wound around the hub portion so that the two wires W can be pulled out simultaneously while the reel 20 rotates.

3A is a side view showing an example of a magazine according to this embodiment, FIG. 3B is a perspective view showing an example of a magazine according to this embodiment, and FIGS. 4A, 4B, 4C, and 4D are views showing a closed magazine. This is an exploded perspective view showing an example of the regulating section of the present embodiment that regulates the magazine 2 when the magazine 2 is closed. The configuration of the regulating section of the embodiment will be explained.

The magazine 2 includes an accommodating section 21 in which the reel 20 is accommodated, and a lid section 22 that covers the accommodating section 21 in an openable and closable manner.

The accommodating portion 21 is attached to the main body portion 10 . The accommodating portion 21 includes a side wall portion 21a that closes one side along the axis of rotation of the reel 20, and a peripheral wall portion 21b that stands up from the side wall portion 21a along the circumferential direction of the rotation of the reel 20. In the accommodating portion 21, a space large enough to allow the reel 20 to rotate is formed by the side wall portion 21a and the peripheral wall portion 21b.

Further, the accommodating portion 21 opens the other side along the rotational axis of the reel 20 with a size that allows the reel 20 to be attached and detached, and faces the feeding path of the wire W pulled out from the reel 20. An opening 21c is provided, which is a part of the front peripheral wall 21b.

The lid portion 22 opens and closes the opening portion 21c of the housing portion 21 by rotating around the shaft 23 as a fulcrum. The lid portion 22 has a shape that covers the opening 21c of the accommodating portion 21, and includes a front wall portion 22a on the side opposite to the side supported by the shaft 23. The front wall portion 22 a constitutes the peripheral wall of the magazine 2 together with the front peripheral wall portion 21 b of the housing portion 21 .

The shaft 23 is supported by the peripheral wall portion 21b on the rear side of the housing portion 21. The direction in which the shaft 23 extends is substantially orthogonal to the axis of rotation of the reel 20 housed in the magazine 2.

The magazine 2 includes a first biasing member 24a that biases the lid portion 22 in the opening direction. The magazine 2 also includes a second biasing member 24b that biases the lid portion 22 in a first direction indicated by an arrow B1, which is one direction along the extending direction of the shaft 23.

The first biasing member 24a is formed of, for example, a torsion coil spring inserted into the shaft 23, and biases the lid portion 22 in the opening direction by being elastically deformed in a torsional direction. Further, the second biasing member 24b is composed of, for example, a coil spring inserted into the shaft 23, and is elastically deformed in the direction of expansion and contraction, so that the second biasing member 24b moves the lid portion 22 along the direction in which the shaft 23 extends, as shown by the arrow B1. 1 direction.

The magazine 2 includes a lock member 25 that is movable between a closed position where the lid 22 is held in a closed state and an open position where the lid 22 is retracted to a position where it can be opened and closed. The locking member 25 is an example of one of a plurality of regulating parts that regulates opening of the lid part 22 from the closed state, and one end thereof is rotatably supported by the housing part 21 by a shaft 25a. , and moves between the closed position shown in FIGS. 1A and 1B and the open position shown in FIGS. 3A and 3B by a rotational movement using the shaft 25a as a fulcrum.

Further, the locking member 25 is attached to the other end opposite to the shaft 25a, and when the locking member 25 moves to the closed position, the locking member 25 is inserted in the second direction shown by arrow B2, which is the other direction along the extending direction of the shaft 23. It is provided with an action part 25b that presses the lid part 22.

The lid portion 22 includes a pressed portion 22b at a first position, which is one side along the extending direction of the shaft 23, along the locus of the rotational movement of the locking member 25 with the shaft 25a as a fulcrum.

The pressed portion 22b is one example of a plurality of restriction portions that restrict opening of the lid portion 22 from the closed state, and is a surface substantially perpendicular to the direction in which the shaft 25a of the locking member 25 extends. Consists of.

In the magazine 2, when the locking member 25 is moved to the closed position with the lid 22 closed, the locking member 25 comes into contact with the pressed portion 22b of the lid 22, and the lid 22 is held in the closed state.

The lid portion 22 also includes an actuated portion 22c that follows the trajectory of the acting portion 25b caused by the rotational movement of the locking member 25 about the shaft 25a.

The actuated portion 22c is constituted by a surface whose distance from the axis 25a of the locking member 25 changes, and when the locking member 25 moves to the closed position, the vicinity of the portion in contact with the acting portion 25b of the locking member 25 is The distance from the shaft 25a of the locking member 25 is shorter than that of the other parts.

When the acting portion 25b of the locking member 25 comes into contact with a portion where the distance from the shaft 25a becomes shorter when the locking member 25 moves to the closed position, the acting portion 22c is moved to the other side along the extending direction of the shaft 23. A force is applied to push the lid portion 22 in the second direction indicated by arrow B2. Note that the operated portion 22c may be formed such that a portion having the shortest distance from the shaft 25a has a predetermined length along the rotational direction of the locking member 25 that moves to the closed position. Further, a clutch or the like may be provided on the shaft 25a to prevent the locking member 25 that has been moved to the closed position from returning to the open position inadvertently.

In the reinforcing bar binding machine 1A, when the lock member 25 moves to the closed position and the lid part 22 is pushed in the second direction indicated by arrow B2, which is the other direction along the extending direction of the shaft 23, the lid part 22 is moved to the closed position. 22 in a closed state.

The regulating part 26 is an example of one of a plurality of regulating parts that regulates opening of the lid part 22 from the closed state, and includes a locking part 26a provided on the lid part 22 and a locking part 26a provided on the main body part 10. and a locked portion 26b to which the locking portion 26a is locked. The regulating portion 26 is provided on the downstream side of the feeding path of the wire W fed in the positive direction indicated by the arrow F from the axis of rotation of the reel 20 .

The lid part 22 moves in a second direction shown by arrow B, in which the locking part 26a is locked with the locked part 26b, and in a second direction shown by arrow B1, in which the locking between the locking part 26a and the locked part 26b is released. It is supported so as to be movable along the extending direction of the shaft 23 in a first direction indicated by .

The locking portion 26a is provided at a second position on the other side of the lid portion 22 along the extending direction of the shaft 23, and is configured integrally with the front wall portion 22a of the lid portion 22. The locking portion 26a is constituted by a convex portion that projects from the end of the front wall portion 22a in the second direction indicated by arrow B2, which is the other direction along the extending direction of the shaft 23.

The locked portion 26b is provided in the cover portion 10a of the main body portion 10, which constitutes the exterior of a portion of the wire feeding portion 3 that covers the feed gear 30, which will be described later, etc., and when the lid portion 22 is in a closed state, A concave portion having a shape that matches the locking portion 26a is provided at a portion facing the locking portion 26a.

The regulating portion 26 prevents the locking portion 26a from entering the locked portion 26b when the lid portion 22 is urged by the second urging member 24b and moved in the first direction indicated by arrow B1. The height of the protrusion of the locking portion 26a from the front wall portion 22a is set. On the other hand, when the lid part 22 in the closed state is pushed in the second direction indicated by arrow B2, the locking part 26a enters the locked part 26b, and the regulating part 26 maintains the lid part 22 in the closed state. Hold.

Here, the magazine 2 is provided with a convex part connected from the front wall part 22a to the side part at a second position on the other side along the extending direction of the shaft 23 in the lid part 22, in addition to the locking part 26a. Alternatively, other locking portions 27a may be provided. Moreover, when the lid part 22 is in the closed state, the main body part 10 is provided with a recessed part in the cover part 10a, which is a part of the cover part 10a that faces the locking part 27a, and has a shape that matches the locking part 27a, and a locked part 26b. In addition to this, other locked portions 27b may be provided.

Further, the magazine 2 includes a locking protrusion 28a in the housing part 21 at a position facing the cover part 10a, and a locking recess 28b into which the locking protrusion 28a fits into the cover part 10a. Deformation in the opening direction with respect to the lid portion 22 is suppressed.

In the embodiment described above, the locking portion 26a is a convex portion and the locked portion 26b is a recess, and the locking portion 26a is locked to the locked portion 26b by fitting the projections and recesses. The locking portion 26a may be a concave portion, and the locked portion 26b may be a convex portion.

Furthermore, in the embodiment described above, the locked portion 26b is provided in the main body portion 10. On the other hand, in a case where the portion of the lid 22 facing the end of the front wall 22a is configured as a part of the accommodating portion 21 when the lid 22 is closed, the lid 22 has a locking portion. 26a is provided, and the accommodating portion 21 may be provided with a locked portion 26b to which the locking portion 26a is locked.

Next, another configuration of the reinforcing bar binding machine 1A will be explained. The wire feeding section 3 includes a pair of feeding gears 30 that sandwich and feed the wire W. In the wire feeding section 3, the rotational operation of a feed motor (not shown) is transmitted, and a feeding gear 30 rotates. Thereby, the wire feeding section 3 feeds the wire W held between the pair of feeding gears 30 along the extending direction of the wire W. In a configuration in which a plurality of wires W, for example two wires, are sent and the reinforcing bars S are tied together, the two wires W are sent in a parallel state.

The wire feeding section 3 switches the rotational direction of the feeding gear 30 by switching between forward and reverse rotational directions of a motor (not shown), and feeds the wire W in the forward direction indicated by arrow F or in the reverse direction indicated by arrow R. The wire W is sent or the direction of feeding the wire W is switched between forward and reverse.

The curl forming section 5 includes a curl guide 50 that imparts a curl to the wire W fed by the wire feed section 3, and a guide guide 51 that guides the wire W curled by the curl guide 50 to the binding section 7. In the reinforcing bar binding machine 1A, the path of the wire W sent by the wire feeding section 3 is regulated by the curl forming section 5, so that the trajectory of the wire W becomes a loop Ru as shown by the two-dot chain line in FIG. is wound around the reinforcing bar S.

The cutting section 6 includes a movable blade section 61 and a transmission mechanism 62 that transmits the operation of the binding section 7 to the movable blade section 61. The cutting section 6 cuts the wire W by rotating a movable blade section 61 using a fixed blade section (not shown) as a fulcrum axis. The transmission mechanism 62 is composed of a cam, a link, and the like.

The binding section 7 includes a wire locking body 70 to which the wire W is locked. A detailed embodiment of the binding section 7 will be described later. The drive section 8 includes a motor 80 as a second drive section and a speed reducer 81 that performs deceleration and torque amplification.

The reinforcing bar binding machine 1A includes a feed regulating section 90 in which the tip of the wire W is brought into contact with the feed path of the wire W that is locked by the wire locking body 70. Further, in the reinforcing bar binding machine 1A, the curl guide 50 and guide guide 51 of the curl forming section 5 described above are provided at the front end of the main body section 10. Furthermore, in the reinforcing bar binding machine 1A, an abutment part 91 against which the reinforcing bars S abut is provided between the curl guide 50 and the guiding guide 51 at the front end of the main body part 10.

Further, in the reinforcing bar binding machine 1A, the handle portion 11 extends downward from the main body portion 10. Furthermore, a battery 15 is removably attached to the lower part of the handle portion 11. Further, in the reinforcing bar binding machine 1A, a magazine 2 is provided in front of the handle portion 11.

In the reinforcing bar binding machine 1A, a trigger 12 is provided on the front side of a handle portion 11, and a switch 13 is provided inside the handle portion 11. In the reinforcing bar binding machine 1A, a control section (not shown) controls the feed motor and the motor 80 according to the state of the switch 13 that is pressed by operating the trigger 12.

FIGS. 5A and 5B are cross-sectional plan views showing an example of a binding section. Next, the configuration of the binding section will be described with reference to each figure.

The binding section 7 includes a rotating shaft 72 that operates the wire locking body 70 and the sleeve 71. In the binding section 7 and the drive section 8, a rotating shaft 72 and a motor 80 are connected via a reducer 81, and the rotating shaft 72 is driven by the motor 80 via the reducer 81.

The wire locking body 70 includes a center hook 70C connected to the rotating shaft 72, and a first side hook 70R and a second side hook 70L that open and close with respect to the center hook 70C.

The center hook 70C is attached to the tip of the rotating shaft 72, which is one end along the axial direction of the rotating shaft 72, and is rotatable relative to the rotating shaft 72 and movable in the axial direction integrally with the rotating shaft 72. are connected through possible configurations.

The wire locking body 70 opens and closes in a direction in which the distal end side of the first side hook 70R approaches and separates from the center hook 70C by a rotational movement about the shaft 71b. Moreover, the tip side of the second side hook 70L opens and closes in the direction of coming into contact with and separating from the center hook 70C.

The sleeve 71 has a convex portion (not shown) that protrudes from the inner circumferential surface of the space into which the rotary shaft 72 is inserted, and this convex portion engages a feed screw 72a formed along the axial direction on the outer circumference of the rotary shaft 72. Enter the groove. When the rotating shaft 72 rotates, the sleeve 71 moves in a direction along the axial direction of the rotating shaft 72 according to the rotational direction of the rotating shaft 72 due to the action of a convex portion (not shown) and a feed screw 72a of the rotating shaft 72. . Further, the sleeve 71 rotates integrally with the rotating shaft 72.

The sleeve 71 includes an opening/closing pin 71a that opens and closes the first side hook 70R and the second side hook 70L.

The opening/closing pin 71a is inserted into the opening/closing guide hole 73 provided in the first side hook 70R and the second side hook 70L. The opening/closing guide hole 73 extends along the moving direction of the sleeve 71, and guides the linear movement of the opening/closing pin 71a, which moves in conjunction with the sleeve 71, through a first side hook 70R and a first side hook 70R with a shaft 71b as a fulcrum. It has a shape that converts into an opening/closing operation by rotation of the second side hook 70L.

In the wire locking body 70, when the sleeve 71 moves in the direction of the arrow A2, the first side hook 70R and the second side hook 70L are aligned with the shaft 71b due to the locus of the opening/closing pin 71a and the shape of the opening/closing guide hole 73. It moves in the direction away from the center hook 70C by a rotational movement using the center hook 70C as a fulcrum.

As a result, the first side hook 70R and the second side hook 70L open with respect to the center hook 70C, and between the first side hook 70R and the center hook 70C, the second side hook 70L and the center hook 70C A feeding path through which the wire W passes is formed between the two.

When the first side hook 70R and the second side hook 70L are opened with respect to the center hook 70C, the wire W fed by the wire feeding section 3 passes between the center hook 70C and the first side hook 70R. Pass. The wire W passing between the center hook 70C and the first side hook 70R is guided to the curl forming part 5. The wire W, which has been curled by the curl forming part 5 and guided to the binding part 7, passes between the center hook 70C and the second side hook 70L.

In the wire locking body 70, when the sleeve 71 moves in the direction of the arrow A1, the first side hook 70R and the second side hook 70L are aligned with the shaft 71b due to the locus of the opening/closing pin 71a and the shape of the opening/closing guide hole 73. It moves in a direction approaching the center hook 70C by a rotational movement using the center hook as a fulcrum. Thereby, the first side hook 70R and the second side hook 70L close to the center hook 70C.

When the first side hook 70R closes with respect to the center hook 70C, the wire W sandwiched between the first side hook 70R and the center hook 70C moves between the first side hook 70R and the center hook 70C. It is locked in a form that allows it to be moved. Further, when the second side hook 70L closes to the center hook 70C, the wire W sandwiched between the second side hook 70L and the center hook 70C is connected to the second side hook 70L and the center hook 70C. It is locked in such a way that it cannot be slipped out from between.

The sleeve 71 has a bending part 71c1 that shapes the wire W into a predetermined shape by pushing and bending one end of the wire W in a predetermined direction, and the other end of the wire W cut by the cutting part 6. A bending portion 71c2 is provided that shapes the wire W into a predetermined shape by pushing and bending the terminal end side, which is the end portion, in a predetermined direction.

By moving in the direction of arrow A1, the sleeve 71 pushes the tip side of the wire W, which is locked by the center hook 70C and the second side hook 70L, with the bending portion 71c1, and bends it toward the reinforcing bar S side. Further, by moving in the direction of arrow A1, the sleeve 71 is locked by the center hook 70C and the first side hook 70R, and pushes the terminal end side of the wire W cut by the cutting part 6 with the bending part 71c2, and Bend it to the S side.

The binding section 7 includes a rotation regulating section 74 that regulates the rotation of the wire locking body 70 and the sleeve 71 in conjunction with the rotational movement of the rotating shaft 72 . In the binding part 7, the rotation regulating part 74 regulates the rotation of the sleeve 71 in conjunction with the rotation of the rotating shaft 72, depending on the position of the sleeve 71 along the axial direction of the rotating shaft 72. The sleeve 71 moves in the arrow A1 direction and the arrow A2 direction by the rotational operation.

As a result, the sleeve 71 moves in the direction of arrow A1 without rotating, so that the first side hook 70R and the second side hook 70L close to the center hook 70C, and the wire W is locked. Further, by moving the sleeve 71 in the direction of arrow A2 without rotating, the first side hook 70R and the second side hook 70L open relative to the center hook 70C, and the wire W is unlocked. .

In the binding section 7, when the rotation of the sleeve 71 is no longer restricted by the rotation restriction section 74, the sleeve 71 rotates in conjunction with the rotation of the rotating shaft 72.

As a result, the first side hook 70R, second side hook 70L, and center hook 70C that have locked the wire W are rotated, and the locked wire W is twisted.

<Operation example of the reinforcing bar binding machine of this embodiment>
FIG. 6A is a perspective view showing an example of an operation that allows the magazine to be opened and closed, and FIG. 6B is a side view showing an example of an operation that allows the magazine to be opened and closed. Further, FIG. 7A is a perspective view showing an example of the operation to close the magazine, and FIG. 7B is a side view showing an example of the operation to close the magazine. Next, the operation of opening and closing the lid portion 22 of the magazine 2 will be described with reference to each figure.

In the magazine 2, as shown in FIGS. 6A and 6B, when the lock member 25 moves to the open position, the acting portion 25b of the locking member 25 separates from the actuated portion 22c of the lid portion 22. As a result, no force is generated in the second direction indicated by arrow B2, which is the other direction along the extending direction of the shaft 23, to push the lid part 22 by the action part 25b of the locking member 25.

Therefore, in the magazine 2, when the locking member 25 moves to the open position, the lid part 22 moves in the first direction indicated by the arrow B1, which is one direction along the extending direction of the shaft 23, and the second biasing member 24b and moves.

The regulating portion 26 is located at a position where the locking portion 26a does not enter the locked portion 26b when the lid portion 22 is urged by the second urging member 24b and moved in the first direction indicated by the arrow B1. , so that opening and closing of the lid part 22 is not obstructed. Therefore, the reel 20 can be loaded, replaced, etc. by opening the lid 22. Note that a configuration without the second biasing member 24b may also be used. In this case, the locking portion 26a does not enter the locked portion 26b by the operator moving the lid portion 22 in the first direction indicated by arrow B1, which is one direction along the extending direction of the shaft 23. The opening and closing of the lid 22 is not obstructed.

On the other hand, in the magazine 2, as shown in FIGS. 7A and 7B, when the lid 22 is in a closed state and the lock member 25 is moved to the closed position, the operated portion 22c of the lid 22 is moved to the locking member. 25, the lid part 22 is pushed in the second direction shown by arrow B2, which is the other direction along the extending direction of the shaft 23.

In the regulating portion 26, when the lid portion 22 in the closed state is pushed in the second direction indicated by arrow B2, the locking portion 26a enters the locked portion 26b and holds the lid portion 22 in the closed state. In addition, when the lid part 22 is provided with another locking part 27a and the cover part 10a is provided with another locked part 27b, when the lid part 22 in the closed state is pushed in the second direction shown by arrow B2, , the other locking part 27a enters the other locked part 27b and holds the lid part 22 in a closed state.

As a result, the magazine 2 moves the locking member 25 to the closed position with the lid 22 closed, so that the first position of the lid 22, which is one side along the extending direction of the shaft 23, is moved to the closed position. , is held in a closed state by a locking member 25. Further, the magazine 2 is held in a closed state by a regulating portion 26 at a second position of the lid portion 22, which is the other side along the extending direction of the shaft 23.

Next, with reference to each figure, the operation of tying reinforcing bars S with wires W by the reinforcing bar tying machine 1A of this embodiment will be described.

The reinforcing bar binding machine 1A is in a standby state when the wire W is held between a pair of feed gears 30 and the tip of the wire W is located between the holding position of the feed gear 30 and the cutting section 6. . In addition, in the standby state of the reinforcing bar binding machine 1A, as shown in FIG. 5A, the first side hook 70R opens to the center hook 70C, and the second side hook 70L opens to the center hook 70C. state.

When the reinforcing bar S is inserted between the curl guide 50 and the guide guide 51 of the curl forming section 5 and the switch 13 is pressed by operating the trigger 12, the wire W is moved in the direction indicated by the arrow F in the wire feeding section 3. Send in the direction.

In the case of a configuration in which a plurality of wires W, for example two wires W, are sent, the two wires W are sent in parallel along the axial direction of the loop Ru formed by the wires W.

The wire W sent in the forward direction passes between the center hook 70C and the first side hook 70R, and is sent to the curl guide 50 of the curl forming section 5. By passing through the curl guide 50, the wire W is given a curling tendency to be wound around the reinforcing bar S.

The wire W, which has been curled by the curl guide 50, is guided to the guide guide 51, and further sent in the forward direction by the wire feeding section 3, so that the guide guide 51 connects the center hook 70C and the second side hook 70L. guided between. Then, the wire W is fed until the tip thereof abuts against the feed regulating section 90.

When the tip of the wire W is fed to a position where it abuts against the feed regulating portion 90, the feeding of the wire W in the forward direction is stopped, and then the motor 80 is driven in the forward rotation direction. The rotation of the sleeve 71 in conjunction with the rotation of the rotary shaft 72 is restricted by the rotation restriction portion 74 in an operating range in which the wire W is locked by the wire locking body 70 . As a result, the rotation of the motor 80 is converted into linear movement, and the sleeve 71 moves in the forward direction of arrow A1.

When the sleeve 71 moves forward, the opening/closing pin 71a passes through the opening/closing guide hole 73. As a result, the first side hook 70R moves in a direction approaching the center hook 70C by rotating around the shaft 71b. When the first side hook 70R closes with respect to the center hook 70C, the wire W sandwiched between the first side hook 70R and the center hook 70C moves between the first side hook 70R and the center hook 70C. It is locked in a form that allows it to be moved.

Further, the second side hook 70L moves in a direction approaching the center hook 70C by a rotational movement using the shaft 71b as a fulcrum. When the second side hook 70L closes with respect to the center hook 70C, the wire W sandwiched between the second side hook 70L and the center hook 70C moves between the second side hook 70L and the center hook 70C. It is locked in such a way that it cannot be removed.

As shown in FIG. 5B, after the sleeve 71 is advanced to the position where the first side hook 70R and the second side hook 70L are closed to lock the wire W, the rotation of the motor 80 is temporarily stopped, and the W is sent in the opposite direction indicated by arrow R. Since the tip end of the wire W is locked between the second side hook 70L and the center hook 70C in a manner that it cannot be pulled out, the wire W is wound around the reinforcing bar S by the action of sending the wire W in the opposite direction.

After stopping feeding the wire W in the reverse direction due to an increase in load caused by the wire W being wrapped around the reinforcing bar S, the motor 80 is driven in the forward rotation direction to further move the sleeve 71 in the direction indicated by the arrow A1. Move it in the forward direction indicated by . The movement of the sleeve 71 moving forward is transmitted to the cutting section 6 by the transmission mechanism 62, thereby operating the movable blade section 61 and cutting the wire W held by the first side hook 70R and the center hook 70C. be done.

By driving the motor 80 in the forward rotational direction, the sleeve 71 is moved forward as indicated by the arrow A1 to cut the wire W, and at the same time, the bent portions 71c1 and 71c2 move in a direction approaching the reinforcing bar S. Thereby, the tip side of the wire W, which is locked by the center hook 70C and the second side hook 70L, is pressed toward the reinforcing bar S by the bending portion 71c1, and is bent toward the reinforcing bar S using the locked position as a fulcrum. As the sleeve 71 moves further forward, the wire W locked between the second side hook 70L and the center hook 70C is held in a state where it is sandwiched between the bent portions 71c1.

Further, the terminal end side of the wire W, which is locked by the center hook 70C and the first side hook 70R and cut by the cutting part 6, is pressed toward the reinforcing bar S by the bending part 71c2, and the reinforcing bar is held at the locked position as a fulcrum. Bend it to the S side. As the sleeve 71 moves further forward, the wire W locked between the first side hook 70R and the center hook is held in a state where it is sandwiched between the bending portions 71c2.

After the leading end and the terminal end of the wire W are bent toward the reinforcing bar S, the motor 80 is further driven in the forward rotation direction, thereby moving the sleeve 71 further forward. When the sleeve 71 moves to a predetermined position, the restriction on the rotation of the sleeve 71 by the rotation restriction section 74 is released.

As a result, the motor 80 is further driven in the forward rotation direction, so that the sleeve 71 rotates in conjunction with the rotating shaft 72, and the wire W that is locked by the wire locking body 70 is twisted.

Based on the fact that the load applied to the motor 80 by twisting the wire W has reached the maximum, driving of the motor 80 in the forward rotation direction is stopped, and then the motor 80 is driven in the reverse rotation direction. When the motor 80 is driven in the reverse rotation direction, the rotation shaft 72 rotates in the reverse direction, and when the sleeve 71 rotates in the reverse direction following the reverse rotation of the rotation shaft 72, the rotation regulating portion 74 interlocks with the rotation of the rotation shaft 72. The rotation of the sleeve 71 is restricted. As a result, the sleeve 71 moves in the direction of arrow A2, which is the rearward direction.

When the sleeve 71 moves backward, the bent portions 71c1 and 71c2 separate from the wire W, and the wire W is no longer held by the bent portions 71c1 and 71c2. Furthermore, when the sleeve 71 moves rearward, the opening/closing pin 71a passes through the opening/closing guide hole 73. As a result, the first side hook 70R moves in a direction away from the center hook 70C by rotating around the shaft 71b. Further, the second side hook 70L moves in a direction away from the center hook 70C by a rotational movement using the shaft 71b as a fulcrum. As a result, the wire W is removed from the wire locking body 70.

<Example of effects of the reinforcing bar binding machine of this embodiment>
In order to wrap the wire W around the reinforcing bar S, the wire W is fed in the opposite direction, and the wire W loosened in the magazine 2 is bent between the feed gear 30 of the wire feed section 3 and the reel 20, a condition called buckling. may occur.

As shown in FIGS. 1B and 2B, the magazine 2 has a configuration in which the housing section 21 is offset in the direction of the lid section 22 with respect to the feeding path of the wire W by the pair of feeding gears 30. Therefore, if the wire W loosened within the magazine 2 buckles, the wire W may deform in a direction approaching the lid 22 and push the lid 22 in the direction of opening.

However, even if the lid 22 is pushed in the opening direction, the lid 22 will not open because the locking member 25 is in the closed position.

However, in a configuration in which the regulating portion 26 is not provided, the other side of the lid portion 22 along the extending direction of the shaft 23, which is the side closer to the main body portion 10, is deformable in the direction away from the accommodating portion 21. , a gap may occur between the lid part 22 and the housing part 21.

If a gap occurs between the lid part 22 and the housing part 21, there is a possibility that the reel 20 will move toward the lid part 22 in the axial direction of rotation by this gap. When the reel 20 moves toward the lid part 22 in the axial direction of rotation, there is a possibility that the reel 20 will not be detected in a configuration in which a sensor for detecting the presence or absence of the reel 20 provided in the housing part 21 is provided.

On the other hand, in the configuration in which the restriction part 26 is provided, the locking member 25 moves to the closed position with the lid part 22 in the closed state, so that the lid part 22 in the closed state moves in the second direction shown by the arrow B2. By being pushed, the locking portion 26a enters the locked portion 26b, and the lid portion 22 is held in a closed state.

As a result, the locking member 25 moves to the closed position with the lid 22 in a closed state, so that the lid 22 is moved from the locking member 25 to the first position on one side along the extending direction of the shaft 23. It is held closed by. Further, the lid portion 22 is held closed at the second position, which is the other side along the extending direction of the shaft 23, by the regulating portion 26.

Therefore, even if the lid part 22 is pushed in the opening direction, the generation of a gap between the lid part 22 and the housing part 21 is suppressed. Therefore, the movement of the reel 20 in the axial direction of rotation toward the lid part 22 is suppressed, and even though the reel 20 is housed in the magazine 2, it is incorrectly determined that the reel 20 is not loaded. This can prevent outputting an error and stopping the operation.

Further, in the regulating portion 26, the locking portion 26a enters the locked portion 26b when the lid portion 22 moves in the second direction indicated by arrow B2 with the operation of moving the locking member 25 to the closed position. The lid portion 22 is held in a closed state. Thereby, the operation of the restricting part 26 is linked with the operation of the locking member 25, so that the operation is easy.

1A...Reinforcing bar binding machine, 10...Main unit, 2...Magazine, 20...Reel, 21...Accommodating part, 21a...Side wall part, 21b...Peripheral wall part, 21c... . . . Opening portion, 22 . . . Lid portion, 22a . . . Front wall portion, 22b . First biasing member, 24b... Second biasing member, 25... Lock member (regulating part), 25a... Shaft, 25b... Acting part, 26... Regulating part, 26a ... Locking part, 26b... Locked part, 3... Wire feeding part, 30... Feeding gear, 5... Curl forming part, 50... Curl guide, 51... Guidance guide, 6... Cutting section, 7... Binding section, 70... Wire locking body, 8... Drive section, W... Wire

Claims (8)

a magazine having a housing part in which a reel around which a wire is wound is housed, and a lid part that covers the housing part in an openable and closable manner;
a wire feeding unit that sends the wire in a forward direction to pull it out from the magazine and in a reverse direction to return it to the magazine;
a curl forming part that constitutes a path for winding the wire sent in the forward direction by the wire feeding part around the bundle;
a binding part that twists the wire sent in the opposite direction by the wire feeding part and wound around the bundle;
A binding machine comprising a plurality of restriction parts that restrict the lid part that closes the storage part from opening from the closed state. One of the plurality of regulating parts includes a locking part provided on the lid, and a locked part provided on the main body to which the housing part is attached, to which the locking part is locked. The binding machine according to claim 1. According to claim 1, one of the plurality of regulating parts includes a locking part provided on the lid part and a locked part provided in the accommodating part and to which the locking part is locked. The binding machine described. Another one of the plurality of restricting parts includes a locking member that is movable between a closed position where the lid part is held in a closed state and an open position where the lid part is retracted to a position where it can be opened and closed. Prepare,
The binding machine according to claim 2 or 3, wherein the locking portion locks the locked portion when the locking member moves to the closed position. The lid portion is supported so as to be movable in a direction in which the locking portion is locked with the locked portion and in a direction in which the locking portion between the locking portion and the locked portion is released,
The binding machine according to claim 4, wherein the operation of moving the locking member to the closed position moves the lid part in a direction in which the locking part is locked with the locked part. The binding machine according to claim 5, further comprising a biasing member that biases the lid in a direction in which the lock between the locking portion and the locked portion is released. The lid portion opens and closes the storage portion by a rotational movement about an axis,
According to claim 1, the plurality of regulating portions regulate, on one side and the other side of the lid portion along the extending direction of the shaft, the lid portion that closes the accommodating portion from opening from a closed state. The binding machine described. a magazine having a housing part in which a reel around which a wire is wound is housed, and a lid part that covers the housing part in an openable and closable manner;
a wire feeding unit that sends the wire in a forward direction to pull it out from the magazine and in a reverse direction to return it to the magazine;
a curl forming part that constitutes a path for winding the wire sent in the forward direction by the wire feeding part around the bundle;
a binding part that twists the wire sent in the opposite direction by the wire feeding part and wound around the bundle;
The tying machine includes a regulating part that regulates opening of the lid part that closes the storage part from the closed state, on the downstream side of the feeding path of the wire fed in the positive direction from the axis of rotation of the reel.

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