JP7367313B2 - tying machine - Google Patents

Description

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

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

A tying machine wraps a wire fed by the driving force of a motor around reinforcing bars by passing it through a guide called a curl guide or the like that gives the wire a curl. This curled wire is guided to a binding part where the wire is twisted using a guide called a guidance guide, and by twisting the wire wrapped around the reinforcing bar at the binding part, the reinforcing bar becomes a wire. It is concluded with.

In such a binding machine, in order to increase the binding force between reinforcing bars, a technique has been proposed in which reinforcing bars are tied together using two wires (see, for example, Patent Document 1).

International Publication No. 2017/014280

At the binding part where the wires are twisted, two wires are locked between a pair of locking members that move away from each other, and the two wires are aligned in parallel along the direction in which the locking members move toward and away from each other. When the two wires are locked, a gap corresponding to two wires is formed between the pair of locking members, and the two wires are locked. This increases the load applied to the locking member.

The present invention was made to solve such problems, and an object of the present invention is to provide a binding machine that can guide the direction in which two wires are lined up.

In order to solve the above-mentioned problems, the present invention includes: a wire feeding section that sends two wires wound around a bundle; and a wire feeding section that arranges the two wires in parallel along the axial direction of a loop formed by the two wires. It has a wire guide and a pair of locking members that move toward and away from each other along the axial direction of the loop, and when the wire is wrapped around a bundle and the pair of locking members move toward each other, the wire is locked. A binding section that twists the wire that is fixed on the locking member, a curl guide that creates a loop-like curl in the wire fed by the wire feed section, and a pair of locks for the wire that has been curled with the curl guide. It includes a guidance guide that guides the wires between the members , and a parallel regulation section that guides the direction in which the two wires passed between the pair of locking members are lined up in the radial direction of the loop. This binding machine is configured by providing a recessed portion against which the tip of the wire is abutted in a feed regulating portion that regulates the feeding of the wire fed by the feeding portion .
Further, the present invention provides a wire feeding unit that sends two wires wound around a bundle, a wire guide that arranges the two wires in parallel along the axial direction of a loop formed by the two wires, and It has a pair of locking members that move toward and away from each other along the axial direction, and is wound around the bundle and is locked to the locking member by moving the pair of locking members toward each other. a binding part that twists the wire that has been fed, a curl guide that creates a loop-like curl in the wire fed by the wire feeding part, and a curl guide that guides the curled wire between a pair of locking members. The guide includes a guiding guide and a parallel regulating part that guides the direction in which the two wires passed between the pair of locking members are lined up in the radial direction of the loop, and the guiding guide has a curling tendency. A binding machine is provided with a guide surface on the outside in the radial direction of the loop formed by the wire, and the parallel regulating section is configured by providing a plurality of surfaces on the guide surface along the axial direction of the loop formed by the wire. .
Further, the present invention provides a wire feeding unit that sends two wires wound around a bundle, a wire guide that arranges the two wires in parallel along the axial direction of a loop formed by the two wires, and a wire guide that arranges the two wires in parallel along the axial direction of the loop formed by the two wires. It has a pair of locking members that move toward and away from each other along the axial direction, and is wound around the bundle and is locked to the locking member by moving the pair of locking members toward each other. a binding part that twists the wire that has been fed, a curl guide that creates a loop-like curl in the wire fed by the wire feeding part, and a curl guide that guides the curled wire between a pair of locking members. The guide includes a guiding guide and a parallel regulating part that guides the direction in which the two wires passed between the pair of locking members are lined up in the radial direction of the loop, and the guiding guide has a curling tendency. A guide surface is provided on the outside in the radial direction of the loop formed by the wire, and the parallel restriction section is configured by providing the guide surface with a surface that is non-parallel to the direction in which the two wires are parallel, which is defined by the wire guide. This is a binding machine.

The two wires guided to the binding part are guided in a direction that intersects the direction in which the locking member comes into contact with and leaves them in parallel, and the direction in which the two wires are lined up is a direction suitable for locking by the locking member. becomes.

In the present invention, in the operation of locking two wires between a pair of locking members that move away from each other, two It becomes a form that locks the wire of the book. Thereby, the load applied to the locking member can be reduced and the two wires W can be reliably locked.

It is a block diagram seen from the side showing an example of the whole structure of a reinforcing bar binding machine. It is a block diagram seen from the side showing an example of principal part composition of a reinforcing bar binding machine. FIG. 1 is a partially cutaway perspective view showing an example of the configuration of main parts of a reinforcing bar binding machine. It is a block diagram seen from the front showing an example of the whole structure of a reinforcing bar binding machine. 3 is a sectional view taken along line AA in FIG. 2. FIG. It is an external side view of a reinforcing bar binding machine. It is an external top view of a reinforcing bar binding machine. It is an external front view of a reinforcing bar binding machine. FIG. 3 is a front view showing an example of a wire feeding section. FIG. 3 is a plan view showing an example of a wire feeding section. FIG. 3 is a plan view showing the guide according to the first embodiment. FIG. 2 is a perspective view showing a guide according to the first embodiment. FIG. 3 is a front view showing the guide according to the first embodiment. FIG. 3 is a side view showing the guide according to the first embodiment. FIG. 9A is a sectional view taken along the line BB in FIG. 9A. 9D is a sectional view taken along line DD in FIG. 9D. FIG. 3 is a cutaway perspective view showing the guide according to the first embodiment. FIG. 3 is a plan cross-sectional view showing an example of a binding part and a driving part. FIG. 3 is a plan cross-sectional view showing an example of a binding part and a driving part. It is a side sectional view showing an example of a binding part and a drive part. FIG. 3 is an operation explanatory diagram showing an example of an operation of binding reinforcing bars with wires. FIG. 3 is an operation explanatory diagram showing an example of an operation of binding reinforcing bars with wires. FIG. 3 is an operation explanatory diagram showing an example of an operation of binding reinforcing bars with wires. FIG. 3 is an operation explanatory diagram showing an example of an operation of binding reinforcing bars with wires. FIG. 3 is an operation explanatory diagram showing an example of an operation of binding reinforcing bars with wires. FIG. 3 is an explanatory diagram showing the movement of a wire in the guide according to the first embodiment. FIG. 3 is an explanatory diagram showing the movement of a wire in the guide according to the first embodiment. FIG. 3 is an explanatory diagram showing the movement of a wire in the guide according to the first embodiment. It is an explanatory view showing a locked state of a wire in a locking member. It is an explanatory view showing a locked state of a wire in a locking member. It is an explanatory view showing a locked state of a wire in a locking member. It is an explanatory view showing movement of the wire in a feed regulation part. It is an explanatory view showing movement of the wire in a feed regulation part. FIG. 7 is a plan view showing a guidance guide according to a second embodiment. FIG. 7 is a perspective view showing a guidance guide according to a second embodiment. It is a front view which shows the guidance guide of 2nd Embodiment. It is a side view which shows the guidance guide of 2nd Embodiment. FIG. 15A is a sectional view taken along line BB in FIG. 15A. FIG. 15A is a sectional view taken along line CC in FIG. 15A. FIG. 15D is a sectional view taken along line DD in FIG. 15D. FIG. 7 is a cutaway perspective view showing a guide according to a second embodiment. FIG. 7 is a sectional view showing a guidance guide according to a third embodiment. FIG. 7 is a cutaway perspective view showing a guide according to a third embodiment. It is a sectional view showing a guidance guide of a 4th embodiment. FIG. 7 is a cutaway perspective view showing a guidance guide according to a fourth embodiment. FIG. 7 is a sectional view showing a guidance guide according to a fifth embodiment. FIG. 7 is a cutaway perspective view showing a guide according to a fifth embodiment.

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>
Fig. 1 is a side configuration diagram showing an example of the overall configuration of a reinforcing bar binding machine, Fig. 2 is a side configuration diagram showing an example of the main part configuration of a reinforcing bar binding machine, and Fig. 3 is a configuration diagram of the reinforcing bar binding machine as seen from the side. FIG. 4A is a front configuration diagram showing an example of the overall configuration of the reinforcing bar binding machine, and FIG. 4B is a cross-sectional view taken along line AA in FIG. 2. . 5 is an external side view of the reinforcing bar binding machine, FIG. 6 is an external top view of the reinforcing bar binding machine, and FIG. 7 is an external front view of the reinforcing bar binding machine.

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 sent and wrapped around the reinforcing bars S, 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 2A in which the wire W is accommodated, and a wire feeding section 3A that sends the wire W in order to realize the above-mentioned functions. In addition, the reinforcing bar binding machine 1A has a first wire guide 4A 1 that guides the wire W drawn into the wire feeding section 3A in an operation of sending the wire W in the forward direction with the wire feeding section 3A, and a first wire guide 4A ₁ that guides the wire W drawn into the wire feeding section 3A, and a wire W fed out from the wire feeding section 3A. A second wire guide 4A ₂ is provided for guiding the wire W that is inserted.

Further, the reinforcing bar binding machine 1A includes a curl forming part 5A that constitutes a path for winding the wire W fed by the wire feeding part 3A around the reinforcing bar S. In addition, the reinforcing bar binding machine 1A has a cutting part 6A that cuts the wire W wrapped around the reinforcing bar S, and a cutting part 6A that cuts the wire W wrapped around the reinforcing bar S, and twists the wire W wrapped around the reinforcing bar S, by sending the wire W in the opposite direction with the wire feeding part 3A. The binding part 7A includes a binding part 7A, and a driving part 8A that drives the binding part 7A.

The magazine 2A is an example of a storage section, and a reel 20 in which a long wire W is wound so as to be unwound is rotatably and detachably stored therein. 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.

The reel 20 includes a cylindrical hub portion 21 around which the wire W is wound, and a pair of flange portions 22 and 23 integrally provided at both ends of the hub portion 21 in the axial direction. The flange portions 22 and 23 have a substantially disk-like shape with a diameter larger than that of the hub portion 21, and are provided concentrically with the hub portion 21. In the reel 20, two wires W are wound around a hub portion 21, so that the two wires W can be drawn out from the reel 20 at the same time.

As shown in FIGS. 4A and 4B, the magazine 2A extends along the axial direction of the hub portion 21 with respect to the feeding path FL of the wire W defined by the first wire guide 4A ₁ and the second wire guide 4A ₂ . The reel 20 is mounted offset in one direction along the axial direction of the reel 20. In this example, the entire hub portion 21 of the reel 20 is offset in one direction with respect to the feeding path FL of the wire W.

FIG. 8A is a front view showing an example of a wire feeding section, and FIG. 8B is a plan view showing an example of a wire feeding section. Next, the configuration of the wire feeding section 3A will be explained. The wire feeding section 3A includes a first feeding gear 30L and a second feeding gear 30R, which serve as a pair of feeding members that sandwich and feed the two wires W arranged in parallel, which feed the wires W by rotational operation.

The first feed gear 30L includes a tooth portion 31L that transmits driving force. In this example, the tooth portion 31L has a shape constituting a spur gear, and is formed around the entire outer periphery of the first feed gear 30L. Further, the first feed gear 30L includes a groove portion 32L into which the wire W is inserted. In this example, the groove portion 32L is constituted by a recessed portion having a substantially V-shaped cross section, and is formed along the circumferential direction around the entire outer periphery of the first feed gear 30L.

The second feed gear 30R includes a tooth portion 31R that transmits driving force. In this example, the tooth portion 31R has a shape constituting a spur gear, and is formed around the entire outer circumference of the second feed gear 30R. Further, the second feed gear 30R includes a groove portion 32R into which the wire W is inserted. In this example, the groove portion 32R is constituted by a recessed portion having a substantially V-shaped cross section, and is formed along the circumferential direction around the entire outer periphery of the second feed gear 30R.

The wire feed section 3A has a groove 32L of the first feed gear 30L and a groove 32R of the second feed gear 30R facing each other, so that the first feed gear 30L and the second feed gear 30R are connected to the first wire guide. The wire guide 4A ₁ and the second wire guide 4A ₂ are provided on both sides of the wire W feeding route FL. The feeding path FL of the wire W becomes the width center position of the wire feeding section 3A formed by the pair of first feeding gear 30L and second feeding gear 30R. As shown in FIG. 4B and the like, the reel 20 is arranged offset in one direction with respect to the width center position of the wire feeding section 3A.

The wire feeding section 3A is configured such that the first feeding gear 30L and the second feeding gear 30R are movable in the direction toward and away from each other. In this example, the second feed gear 30R is displaced relative to the first feed gear 30L.

Therefore, the first feed gear 30L is rotatably supported by the shaft 300L with respect to the support member 301 of the wire feed section 3A. The wire feeding section 3A also includes a first displacement member 36 that displaces the second feeding gear 30R in the direction toward and away from the first feeding gear 30L. The first displacement member 36 rotatably supports a second feed gear 30R on one end side by a shaft 300R. The other end of the first displacement member 36 is rotatably supported by the support member 301 about a shaft 36a as a fulcrum.

The wire feeding section 3A includes a second displacement member 37 that displaces the first displacement member 36. The second displacement member 37 is connected to the first displacement member 36 on one end side. Further, a spring 38 is connected to the other end of the second displacement member 37 . Further, the second displacement member 37 is rotatably supported by the support member 301 between one end side and the other end side using the shaft 37a as a fulcrum.

The first displacement member 36 is pressed by the spring 38 via the second displacement member 37, and is displaced in the direction of arrow V1 by rotational movement about the shaft 36a as a fulcrum. Thereby, the second feed gear 30R is pressed in the direction of the first feed gear 30L by the force of the spring 38.

When two wires W are loaded between the first feed gear 30L and the second feed gear 30R, one wire W enters the groove 32L of the first feed gear 30L, and the second wire W enters the groove 32L of the first feed gear 30L. The wire W is held between the groove 32L of the first feed gear 30L and the groove 32R of the second feed gear 30R, with the other wire W entering the groove 32R of the feed gear 30R.

The wire feeding section 3A connects the tooth section 31L of the first feeding gear 30L and the second The teeth 31R of the feed gear 30R mesh with each other. Thereby, driving force due to rotation is transmitted between the first feed gear 30L and the second feed gear 30R.

In the wire feeding section 3A, in this example, the first feeding gear 30L is on the driving side, and the second feeding gear 30R is on the driven side.

The first feed gear 30L rotates by being transmitted with the rotational operation of a feed motor (not shown). The rotational movement of the first feed gear 30L is transmitted to the second feed gear 30R through the meshing of the tooth portions 31L and 31R, and the second feed gear 30R rotates as a result of the first feed gear 30L.

Thereby, the wire feeding section 3A feeds the wire W held between the first feeding gear 30L and the second feeding gear 30R along the extending direction of the wire W. In the configuration in which two wires W are sent, a frictional force is generated between the groove 32L of the first feed gear 30L and one wire W, and a friction force is generated between the groove 32R of the second feed gear 30R and the other wire W. Due to the frictional force generated and the frictional force generated between one wire W and the other wire W, the two wires W are sent in a parallel state.

In the wire feeding section 3A, the rotation direction of the first feed gear 30L and the second feed gear 30R is switched by switching the rotation direction of a feed motor (not shown) between forward and reverse, so that the forward and reverse directions of feeding the wire W can be switched. Can be switched.

Next, a wire guide for guiding the feeding of the wire W will be explained. As shown in FIG. 4B, the first wire guide 4A ₁ is arranged upstream of the first feed gear 30L and the second feed gear 30R with respect to the feeding direction of the wire W sent in the forward direction. Further, the second wire guide _4A2 is arranged downstream of the first feed gear 30L and the second feed gear 30R with respect to the feeding direction of the wire W sent in the forward direction.

The first wire guide 4A ₁ and the second wire guide 4A ₂ are provided with a guide hole 40A through which the wire W passes. In the reinforcing bar binding machine 1A, the path of the wire W sent by the wire feeding part 3A is regulated by the curl forming part 5A, so that the trajectory of the wire W becomes a loop Ru as shown by the broken line in FIG. wrapped around S.

When the direction intersecting the radial direction of the loop Ru formed by the wire W is defined as the axial direction, the guide holes 40A of the first wire guide 4A ₁ and the second wire guide 4A ₂ are arranged in the axial direction of the loop Ru. It is configured in a shape along which two wires W are passed in parallel. Note that the direction in which the two wires W are arranged in parallel is also the direction along the direction in which the first feed gear 30L and the second feed gear 30R are arranged in parallel.

The first wire guide 4A ₁ and the second wire guide 4A ₂ are provided with a guide hole 40A on the feed path FL of the wire W passing between the first feed gear 30L and the second feed gear 30R. The first wire guide _4A1 guides the wire W passing through the guide hole 40A to the feed path FL between the first feed gear 30L and the second feed gear 30R.

In the first wire guide 4A ₁ and the second wire guide 4A ₂ , the wire introduction part which is upstream of the guide hole 40A with respect to the feeding direction of the wire W sent in the forward direction has an opening area larger than that on the downstream side. It has a tapered shape such as a large conical shape or pyramidal shape. This facilitates the introduction of the wire W into the first wire guide 4A ₁ and the second wire guide 4A ₂ .

Next, a description will be given of the curl forming section 5A that constitutes a feeding path for the wire W that is wound around the reinforcing bar S. The curl forming section 5A includes a curl guide 50 that gives a curl to the wire W sent by the first feed gear 30L and the second feed gear 30R, and a curl guide 50 that makes the wire W curled by the curl guide 50 to the binding section 7A. A guiding guide 51A is provided.

The curl guide 50 includes a guide groove 52 that constitutes a feeding path for the wire W, and a first guide pin 53a and a second guide pin 53b that serve as guide members that give a curl to the wire W in cooperation with the guide groove 52. and a third guide pin 53c. The curl guide 50 has a structure in which a guide plate 50L, a guide plate 50C, and a guide plate 50R are stacked, and the guide plate 50C constitutes the guide surface of the guide groove 52. Further, the guide plates 50L and 50R constitute a side wall surface that stands up from the guide surface of the guide groove 52.

The first guide pin 53a is provided in the curl guide 50 on the side where the wire W is introduced in the forward direction by the first feed gear 30L and the second feed gear 30R. The first guide pin 53a is arranged inside the loop Ru formed by the wire W in the radial direction with respect to the feeding path of the wire W through the guide groove 52. The first guide pin 53a regulates the feeding path of the wire W so that the wire W fed along the guide groove 52 does not enter the inside of the loop Ru formed by the wire W in the radial direction.

The second guide pin 53b is provided between the first guide pin 53a and the third guide pin 53c. The second guide pin 53b is arranged on the outside of the loop Ru formed by the wire W in the radial direction with respect to the feeding path of the wire W through the guide groove 52. A portion of the circumferential surface of the second guide pin 53b protrudes from the guide groove 52. Thereby, the wire W guided by the guide groove 52 comes into contact with the second guide pin 53b at the portion where the second guide pin 53b is provided.

The third guide pin 53c is provided in the curl guide 50 on the discharge side of the wire W fed in the forward direction by the first feed gear 30L and the second feed gear 30R. The third guide pin 53c is arranged on the outside of the loop Ru formed by the wire W in the radial direction with respect to the feeding path of the wire W through the guide groove 52. A portion of the circumferential surface of the third guide pin 53c protrudes from the guide groove 52. Thereby, the wire W guided by the guide groove 52 comes into contact with the third guide pin 53c at the portion where the third guide pin 53c is provided.

The curl forming section 5A includes a retraction mechanism 53 that retracts the first guide pin 53a. The retraction mechanism 53 moves the first guide pin 53a laterally along the axial direction of the first guide pin 53a, so that the first feed gear 30L and the second feed gear 30R move the wire in the opposite direction. By the action of sending the wire W, the first guide pin 53a is evacuated from the path along which the wire W wound around the reinforcing bar S moves.

Next, the effect of making the wire W curl will be explained. The wire W sent in the forward direction by the first feed gear 30L and the second feed gear 30R is connected to two points on the outside in the radial direction of the loop Ru formed by the wire W, and one point on the inside between these two points. By restricting the radial position of the loop Ru formed by the wire W at at least three of the points, the wire W is given a loop-like curl.

In this example, the second wire guide 4A2 is provided upstream of the first guide pin 53a, and the second wire guide _4A2 is provided downstream of the first guide pin 53a with respect to the feeding direction of the wire W sent in the forward direction. The radially outer position of the loop Ru formed by the wire W is regulated by the two points of the third guide pin 53c. Further, the radially inner position of the loop Ru formed by the wire W is regulated by the first guide pin 53a. As a result, the wire W sent in the forward direction by the first feed gear 30L and the second feed gear 30R is curled into a loop shape.

Note that by providing the second guide pin 53b in the guide groove 52 at a position radially outside the loop Ru formed by the wire W and in contact with the wire W sent to the third guide pin 53c, Abrasion of the guide groove 52 can be prevented.

9A is a plan view showing the guiding guide of the first embodiment, FIG. 9B is a perspective view showing the guiding guide of the first embodiment, and FIG. 9C is a plan view showing the guiding guide of the first embodiment. The front view shown in FIG. 9D is a side view showing the guidance guide of the first embodiment. 9E is a sectional view taken along line BB in FIG. 9A, FIG. 9F is a sectional view taken along line DD in FIG. 9D, and FIG. 9G is a cutaway perspective view showing the guide of the first embodiment. .

Next, the guide 51A of the first embodiment will be explained. As shown in FIG. 4A, the guidance guide 51A is arranged in one direction in which the reel 20 is offset with respect to the feeding path FL of the wire W defined by the first wire guide 4A ₁ and the second wire guide 4A ₂ . It is provided at a position offset in another direction which is the opposite direction.

The guidance guide 51A includes a first guide part 55 that regulates the axial position of the loop Ru formed by the wire W that has been curled by the curl guide 50, and a first guide part 55 that regulates the axial position of the loop Ru formed by the wire W. It is provided with a second guide portion 57 that regulates the position of.

The first guide section 55 is provided on the side of the second guide section 57 into which the wire W, which has been curled by the curl guide 50, is introduced. The first guide portion 55 includes a side surface portion 55L on one side, which is the side where the reel 20 is located in one offset direction. Further, the first guide portion 55 includes a side surface portion 55R on the other side, which is a side located in the opposite direction to the one direction in which the reel 20 is offset, facing the side surface portion 55L. Furthermore, the first guide portion 55 includes a bottom surface portion 55D that connects the side surface portion 55L and the side surface portion 55R, with the side surface portion 55L standing upright on one side and the side surface portion 55R standing up on the other side.

The second guide portion 57 includes a guide surface 57a on the outside of the loop Ru formed by the wire W in the radial direction, which is a surface extending toward the binding portion 7A along the feeding direction of the wire W.

One side surface portion 55L of the first guide portion 55 includes a first guide portion 55L1 that guides the wire W to the guide surface 57a of the second guide portion 57, and a first guide portion 55L1 that guides the wire W along the guide surface 57a. 2 guide portions 55L2.

The other side surface portion 55R of the first guide portion 55 includes a third guide portion 55R1 that guides the wire W to the guide surface 57a of the second guide portion 57, and a third guide portion 55R1 that guides the wire W along the guide surface 57a. 4 guide portions 55R2.

In the guidance guide 51A, a focusing passage 55S is defined by a space surrounded by a pair of side surfaces 55L and 55R and a bottom surface 55D. Further, the guiding guide 51A is formed with an open end 55E1 through which the wire W enters the focusing passage 55S. The open end 55E1 is an end of the first guide section 55 on the side away from the second guide section 57, and is open in a space surrounded by the pair of side surfaces 55L and 55R and the bottom surface section 55D. There is.

In the first guide section 55, the distance between the first guide section 55L1 and the third guide section 55R1 becomes narrower from the open end 55E1 toward the guide surface 57a of the second guide section 57. As a result, the first guide portion 55 has a gap between the first guide portion 55L1 and the third guide portion 55R1, and the open end 55EL1 of the first guide portion 55L1 located at the open end 55E1. The opening end 55ER1 of the guide portion 55R1 of No. 3 is widest.

Further, in the first guide part 55, the second guide part 55L2 connected to the first guide part 55L1 is located on one side of the guide surface 57a of the second guide part 57, and the third guide part 55L1 A fourth guide portion 55R2 connected to the guide surface 57a is located on the other side of the guide surface 57a. The second guiding portion 55L2 and the fourth guiding portion 55R2 face each other in parallel with a predetermined interval equal to or larger than the radial width of the two parallel wires W.

As a result, the distance between the first guide part 55L1 and the third guide part 55R1 is such that the first guide part 55L1 is connected to the second guide part 55L2, and the third guide part 55R1 is connected to the fourth guide part 55R2. The part where it connects with is the narrowest. Therefore, the part where the first guide part 55L1 and the second guide part 55L2 are connected becomes the narrowest part 55EL2 of the first guide part 55L1 with respect to the third guide part 55R1. Moreover, the part where the third guide part 55R1 and the fourth guide part 55R2 are connected becomes the narrowest part 55ER2 of the third guide part 55R1 with respect to the first guide part 55L1.

Thereby, in the guiding guide 51A, the narrowest part 55E2 of the focusing passage 55S is between the narrowest part 55EL2 of the first guiding part 55L1 and the narrowest part 55ER2 of the third guiding part 55R1. In the guiding guide 51A, the cross-sectional area of the focusing passage 55S gradually narrows from the open end portion 55E1 toward the narrowest portion 55E2 along the direction in which the wire W enters.

The guidance guide 51A includes an entrance angle regulating section 56A that changes the entrance angle of the wire W entering the focusing passage 55S so as to face the narrowest part 55E2.

In the reinforcing bar binding machine 1A, the reels 20 are arranged offset in one direction. From the reel 20 offset in one direction, the wire W is sent by the wire feeding section 3A and curled by the curl guide 50, and the wire W is fed in the other direction, which is the opposite direction to the one direction in which the reel 20 is offset. Head to.

Therefore, the wire W entering the focusing passage 55S between the side surface portions 55L and 55R of the first guide portion 55 first enters toward the third guide portion 55R1 of the side surface portion 55R. The tip of the wire W entering toward the third guiding portion 55R1 of this side surface portion 55R is placed between the narrowest portion 55EL2 of the first guiding portion 55L1 and the narrowest portion 55ER2 of the third guiding portion 55R1. That is, it is directed toward the narrowest part 55E2 of the focusing passage 55S. For this reason, an approach angle regulating portion 56A is provided on the first guide portion 55L1 of the side surface portion 55L that faces the side surface portion 55R.

The approach angle regulating portion 56A is formed by a virtual line connecting the opening end 55E1 of the focusing passage 55S and the narrowest portion 55E2, in this example, the opening end 55EL1 of the first guiding portion 55L1 and the narrowest portion 55EL2. It is provided at a position protruding inside the imaginary line 55EL3, which is closer to the side surface portion 55R than the connected imaginary line 55EL3. In this example, the approach angle regulating portion 56A is configured such that in the first guide portion 55L1, a portion near the middle between the open end portion 55EL1 and the narrowest portion 55EL2 is convex in the direction of the third guide portion 55R1. Ru. Thereby, the first guide portion 55L1 has a bent shape in plan view shown in FIG. 9A.

The wire that has been curled by the curl guide 50 is introduced between the pair of side surfaces 55L and 55R of the first guide section 55. The guiding guide 51A regulates the position along the axial direction of the loop Ru formed by the wire W by the first guiding part 55L1 and the third guiding part 55R1 of the first guiding part 55, and guide surface 57a of section 57.

Further, the guiding guide 51A moves the position along the axial direction of the loop Ru formed by the wire W guided to the guide surface 57a of the second guide part 57 to the second guiding part of the first guide part 55. 55L2 and the fourth guiding portion 55R2, and the radial position of the loop Ru formed by the wire W is restricted by the guide surface 57a of the second guide portion 57.

In the present example, the guidance guide 51A has a second guide part 57 fixed to the main body part 10A of the reinforcing bar binding machine 1A, and a first guide part 55 fixed to the second guide part 57. Note that the first guide part 55 may be supported by the second guide part 57 in a rotatable state about the shaft 55b as a fulcrum. In such a configuration, the first guide portion 55 is biased by a spring (not shown) in a direction in which the open end portion 55E1 approaches the curl guide 50, and in a direction in which the first guide portion 55 moves toward and away from the curl guide 50. Constructed to be openable and closable. Thereby, after binding the reinforcing bars S with the wires W, the first guide portion 55 is retracted by the action of pulling out the reinforcing bar binding machine 1A from the reinforcing bars S, thereby facilitating the action of pulling out the reinforcing bar binding machine 1A from the reinforcing bars S. .

Next, the cutting section 6A that cuts the wire W wound around the reinforcing bar S will be explained. The cutting portion 6A includes a fixed blade portion 60, a movable blade portion 61 that cuts the wire W in cooperation with the fixed blade portion 60, and a transmission mechanism 62 that transmits the operation of the binding portion 7A to the movable blade portion 61. The fixed blade section 60 includes an opening 60a through which the wire W passes, and an edge section capable of cutting the wire W in the opening 60a.

The movable blade part 61 cuts the wire W passing through the opening 60a of the fixed blade part 60 by rotating around the fixed blade part 60 as a fulcrum axis. The transmission mechanism 62 transmits the operation of the binding section 7A to the movable blade section 61, rotates the movable blade section 61 in conjunction with the operation of the binding section 7A, and cuts the wire W.

The fixed blade part 60 is provided on the downstream side of the second wire guide _4A2 with respect to the feeding direction of the wire W sent in the forward direction, and the opening 60a constitutes the wire guide.

10A and 10B are plan sectional views showing an example of a binding part and a driving part, and FIG. 10C is a side sectional view showing an example of a binding part and a driving part. The drive section 8A that drives the section 7A and the binding section 7A will be explained.

The binding section 7A includes a locking member 70 to which the wire W is locked, an operating member 71 that opens and closes the locking member 70, and a rotating shaft 72 that operates the locking member 70 and the operating member 71.

The locking member 70 includes a first movable locking member 70L, a second movable locking member 70R, and a fixed locking member 70C. In the locking member 70, the tip side of the first movable locking member 70L is located on one side with respect to the fixed locking member 70C, and the tip side of the second movable locking member 70R is located on the one side with respect to the fixed locking member 70C. located on the other side.

In the locking member 70, the rear end sides of the first movable locking member 70L and the second movable locking member 70R are rotatably supported by the fixed locking member 70C around a shaft 76. As a result, the locking member 70 opens and closes in a direction in which the distal end side of the first movable locking member 70L approaches and separates from the fixed locking member 70C by rotational movement about the shaft 76 as a fulcrum. Further, the distal end side of the second movable locking member 70R opens and closes in a direction toward and away from the fixed locking member 70C.

The operating member 71 and the rotating shaft 72 are arranged so that the rotational movement of the rotating shaft 72 is controlled by the threaded portion provided on the outer periphery of the rotating shaft 72 and the nut portion provided on the inner periphery of the operating member 71. This is converted into a movement of the actuating member 71 in the longitudinal direction along the axial direction of the actuating member 72 . The actuation member 71 includes an opening/closing pin 71a that opens and closes the first movable locking member 70L and the second movable locking member 70R.

The opening/closing pin 71a is inserted into the opening/closing guide hole 73 provided in the first movable locking member 70L and the second movable locking member 70R. The opening/closing guide hole 73 extends along the moving direction of the actuating member 71, and serves as a first movable lock with a shaft 76 as a fulcrum to prevent linear movement of the opening/closing pin 71a that moves in conjunction with the actuating member 71. It has a shape that converts into an opening/closing operation by rotation of the member 70L and the second movable locking member 70R. Note that although FIGS. 10A and 10B illustrate the opening/closing guide hole 73 provided in the first movable locking member 70L, the second movable locking member 70R also has a similar opening/closing hole with a symmetrical shape. A guide hole 73 is provided.

In the binding portion 7A, the side where the locking member 70 is provided is the front side, and the side where the actuating member 71 is provided is the rear side. When the actuating member 71 moves backward as indicated by arrow A2, the locking member 70 becomes the first movable locking member as shown in FIG. The movable locking member 70L and the second movable locking member 70R move in a direction away from the fixed locking member 70C by rotating around the shaft 76.

As a result, the first movable locking member 70L and the second movable locking member 70A open with respect to the fixed locking member 70C, and between the first movable locking member 70L and the fixed locking member 70C, A feeding path through which the wire W passes is formed between the second movable locking member 70R and the fixed locking member 70C.

When the first movable locking member 70L and the second movable locking member 70R are open with respect to the fixed locking member 70C, the wire W is sent by the first feed gear 30L and the second feed gear 30R. is guided by the first wire guide 4A ₁ and the second wire guide 4A ₂ , and passes between the fixed locking member 70C and the first movable locking member 70L. The wire W passing between the fixed locking member 70C and the first movable locking member 70L is guided to the curl forming portion 5A. Further, the wire W that has been curled by the curl forming part 5A and guided to the binding part 7A passes between the fixed locking member 70C and the second movable locking member 70R.

When the actuating member 71 moves in the forward direction indicated by arrow A1, the locking member 70 becomes the first movable locking member as shown in FIG. The movable locking member 70L and the second movable locking member 70R move in a direction approaching the fixed locking member 70C by rotating around the shaft 76. This causes the first movable locking member 70L and the second movable locking member 70A to close with respect to the fixed locking member 70C.

When the first movable locking member 70L closes with respect to the fixed locking member 70C, the wire W sandwiched between the first movable locking member 70L and the fixed locking member 70C is connected to the first movable locking member 70C. The locking member 70L and the fixed locking member 70C are locked in a movable manner. Further, when the second movable locking member 70R closes with respect to the fixed locking member 70C, the wire W sandwiched between the second movable locking member 70R and the fixed locking member 70C is The movable locking member 70R and the fixed locking member 70C are locked in such a manner that they do not come off.

The actuating member 71 has a bending part 71b1 that pushes and bends the tip WS side, which is one end of the wire W, in a predetermined direction, and a terminal end (WE) side, which is the other end of the wire W cut at the cutting part 6A. It is provided with a bending portion 71b2 that is bent by pressing in a predetermined direction.

By moving forward as indicated by arrow A1, the actuating member 71 pushes the tip WS side of the wire W, which is locked by the fixed locking member 70C and the second movable locking member 70R, with the bending portion 71b1, and Bend it to the S side. Further, by moving forward as shown by arrow A1, the actuating member 71 is locked by the fixed locking member 70C and the first movable locking member 70L, and the terminal end of the wire W cut by the cutting portion 6A ( WE) side by the bending part 71b2 and bend it to the reinforcing bar S side.

The binding section 7A includes a rotation regulating section 74 that regulates the rotation of the locking member 70 and the operating member 71 that are interlocked with the rotational movement of the rotating shaft 72. The rotation restricting portion 74 is provided on the actuating member 71. The rotation restricting portion 74 is locked by a locking portion (not shown) in an operation range in which the wire W is locked by the locking member 70 and in an operation range in which the wire W is bent by the bending portions 71b1 and 71b2 of the actuating member 71. This restricts the rotation of the actuating member 71 in conjunction with the rotation of the rotating shaft 72, and the actuating member 71 moves in the front-rear direction due to the rotational movement of the rotating shaft 72. Further, in the range of motion in which the wire W locked by the locking member 70 is twisted, the rotation regulating portion 74 is unlatched from the locking portion (not shown), and the actuating member is Rotate 71. In the locking member 70, the fixed locking member 70C locking the wire W, the first movable locking member 70L, and the second movable locking member 70R rotate in conjunction with the rotation of the operating member 71.

The drive unit 8A includes a motor 80 and a reducer 81 that performs deceleration and torque amplification. In the binding section 7A and the drive section 8A, 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 retraction mechanism 53 for the first guide pin 53a described above is constituted by a link mechanism that converts the movement of the actuating member 71 in the front-back direction into displacement of the first guide pin 53a. Further, the transmission mechanism 62 of the movable blade portion 61 is constituted by a link mechanism that converts the movement of the actuating member 71 in the front-rear direction into a rotational movement of the movable blade portion 61.

Next, the feed regulating section 9A that regulates the feeding of the wire W will be explained. The feed regulating section 9A is configured by providing a member against which the tip WS of the wire W is abutted on the feed path of the wire W passing between the fixed locking member 70C and the second movable locking member 70R. As shown in FIGS. 3 and 4B, in this example, the feed regulating portion 9A is configured integrally with a guide plate 50R that constitutes the curl guide 50, and protrudes from the guide plate 50R in a direction intersecting the feeding path of the wire W. do.

The feed regulating section 9A includes a parallel regulating section 90 that guides the direction in which the wires W are arranged in parallel. The parallel regulation part 90 has a surface of the feed regulation part 9A that is in contact with the wires W, so as to cross the direction in which the two wires W regulated by the first wire guide 4A ₁ and the second wire guide 4A ₂ are arranged in parallel. It is constructed by providing a recessed portion extending in the direction.

Next, the shape of the reinforcing bar binding machine 1A will be explained. The reinforcing bar binding machine 1A is of a type that is held and used by an operator, and includes a main body portion 10A and a handle portion 11A. In the reinforcing bar binding machine 1A, the curl guide 50 and guide guide 51A of the above-mentioned curl forming section 5A are provided at the front end of the main body section 10A. Further, in the reinforcing bar binding machine 1A, a handle portion 11A extends downward from the main body portion 10A. Furthermore, a battery 15A is removably attached to the lower part of the handle portion 11A. Further, in the reinforcing bar binding machine 1A, a magazine 2A is provided in front of the handle portion 11A. In the reinforcing bar binding machine 1A, the above-mentioned wire feeding section 3A, cutting section 6A, binding section 7A, drive section 8A for driving the binding section 7A, etc. are housed in a main body section 10A.

Next, the operation section of the reinforcing bar binding machine 1A will be explained. In the reinforcing bar binding machine 1A, a trigger 12A is provided on the front side of a handle portion 11A, and a switch 13A is provided inside the handle portion 11A. In the reinforcing bar binding machine 1A, a control unit 14A controls a motor 80 and a feed motor (not shown) according to the state of a switch 13A pressed by operating a trigger 12A.

<Example of operation of reinforcing bar binding machine>
11A to 11E are operation explanatory diagrams showing an example of the operation of tying reinforcing bars with wires. Next, referring to each figure, the operation of tying reinforcing bars S with two wires W by the reinforcing bar tying machine 1A. I will explain about it.

In the reinforcing bar binding machine 1A, two wires W are sandwiched between a first feed gear 30L and a second feed gear 30R, and a tip WS of the wire W is connected between the first feed gear 30L and the second feed gear 30R. The standby state is a state located between the sandwiching position with the feed gear 30R and the fixed blade part 60 of the cutting part 6A. In addition, in the standby state of the reinforcing bar binding machine 1A, as shown in FIG. 10A, the first movable locking member 70L opens relative to the fixed locking member 70C, and the second movable locking member 70R locks the fixed locking member 70C. It is in an open state with respect to the member 70C.

When the reinforcing bar S is inserted between the curl guide 50 and the guide guide 51A of the curl forming section 5A and the trigger 12A is operated, the feed motor (not shown) is driven in the forward rotation direction, and the first feed gear 30L is rotated in the forward direction. At the same time, the second feed gear 30R rotates normally following the first feed gear 30L. As a result, the two wires W held between the first feed gear 30L and the second feed gear 30R are fed in the positive direction indicated by the arrow F.

A first wire guide 4A 1 is provided on the upstream side of the wire feeding section _{3A, and a second wire guide 4A 2 is} provided on the downstream side with respect to the feeding direction of the wire W sent in the forward direction by the wire feeding section 3A. Thus, the two wires W are sent in parallel along the axial direction of the loop Ru formed by the wires W.

When the wire W is sent in the forward direction, the wire W passes between the fixed locking member 70C and the first movable locking member 70L, and passes through the guide groove 52 of the curl guide 50 of the curl forming section 5A. Thereby, the wire W is connected to the second wire guide _4A2 , the first guide pin 53a and the third guide pin 53c of the curl guide 50, and further to the upstream side of the third guide pin 53c. The reinforcing bar S is wound around the reinforcing bar S by the second guide pin 53b.

The wire W, which has been curled by the curl guide 50, is guided to the second guide part 57 by the first guide part 55 of the guide guide 51A. The tip WS of the wire W guided to the second guide section 57 contacts the guide surface 57a of the second guide section 57, as shown in FIG. 11A. The wire W, which has been curled by the curl guide 50, is further fed in the forward direction by the wire feeding section 3A, and guided between the fixed locking member 70C and the second movable locking member 70R by the guiding guide 51A. be done. Then, the wire W is fed until the tip end WS abuts against the feed regulating portion 9A. When the tip WS of the wire W is fed to the position where it abuts against the feed regulating portion 9A, the drive of the feed motor (not shown) is stopped.

Note that since there is a slight time lag from when the tip WS of the wire W comes into contact with the feed regulating section 9A until the driving of the wire feeding section 3A is stopped, the wire W is formed as shown in FIG. 11B. The loop Ru is bent in the direction of expanding in the radial direction to the extent that it contacts the bottom surface portion 55D of the first guide portion 55 of the guiding guide 51A.

After stopping feeding the wire W in the forward direction, the motor 80 is driven in the forward rotation direction. In the actuating member 71, the rotational movement of the rotating shaft 72 in conjunction with the rotation of the motor 80 is regulated by the rotation regulating portion 74, and the rotation of the motor 80 is converted into linear movement. As a result, the actuating member 71 moves in the direction of arrow A1, which is the forward direction.

When the actuating member 71 moves forward, the opening/closing pin 71a passes through the opening/closing guide hole 73, as shown in FIG. 10B. As a result, the first movable locking member 70L moves in a direction approaching the fixed locking member 70C by rotating around the shaft 76. When the first movable locking member 70L closes with respect to the fixed locking member 70C, the wire W sandwiched between the first movable locking member 70L and the fixed locking member 70C is connected to the first movable locking member 70C. The locking member 70L and the fixed locking member 70C are locked in a movable manner.

Further, the second movable locking member 70R moves in a direction approaching the fixed locking member 70C by a rotational movement about the shaft 76 as a fulcrum. When the second movable locking member 70R closes with respect to the fixed locking member 70C, the wire W sandwiched between the second movable locking member 70R and the fixed locking member 70C is connected to the second movable locking member 70C. It is locked in such a manner that it cannot be removed from between the locking member 70R and the fixed locking member 70C.

Further, when the actuating member 71 moves forward, the movement of the actuating member 71 is transmitted to the retracting mechanism 53, and the first guide pin 53a retracts.

After the first movable locking member 70L and the second movable locking member 70R move forward to a position where the wire W is locked by the closing operation, the rotation of the motor 80 is temporarily stopped, and a feed (not shown) is made. Drive the motor in the opposite direction. As a result, the first feed gear 30L rotates in the reverse direction, and the second feed gear 30R follows the first feed gear 30L and rotates in the reverse direction.

Therefore, the wire W held between the first feed gear 30L and the second feed gear 30R is fed in the opposite direction indicated by the arrow R. Since the tip WS side of the wire W is locked between the second movable locking member 70R and the fixed locking member 70C in a manner that it cannot be removed, the wire W is sent in the opposite direction as shown in FIG. 11C. As shown, the wire W is wound around the reinforcing bar S so as to be in close contact with it.

After winding the wire W around the reinforcing bar S and stopping the reverse rotation of the feed motor (not shown), the motor 80 is driven in the forward rotation direction to move the actuating member 71 forward as shown by arrow A1. The movement of the actuating member 71 moving forward is transmitted to the cutting section 6A by the transmission mechanism 62, thereby rotating the movable blade section 61 and being locked by the first movable locking member 70L and the fixed locking member 70C. The fixed wire W is cut by the operation of the fixed blade part 60 and the movable blade part 61.

After cutting the wire W, by moving the actuating member 71 further forward, the bent portions 71b1 and 71b2 move in a direction closer to the reinforcing bar S, as shown in FIG. 11D. As a result, the tip WS side of the wire W, which is locked by the fixed locking member 70C and the second movable locking member 70R, is pressed toward the reinforcing bar S by the bending portion 71b1, and the reinforcing bar S is held at the locking position as a fulcrum. bend to the side. As the actuating member 71 moves further forward, the wire W locked between the second movable locking member 70R and the fixed locking member 70C is held in a state where it is sandwiched between the bent portions 71b1. Ru.

Further, the terminal end WE side of the wire W, which is locked by the fixed locking member 70C and the first movable locking member 70L and cut by the cutting part 6A, is pressed toward the reinforcing bar S side by the bending part 71b2 and locked. Use the position as a fulcrum and bend it toward the reinforcing bar S side. As the actuating member 71 moves further forward, the wire W locked between the first movable locking member 70L and the fixed locking member 70C is held in a state where it is sandwiched between the bent portions 71b2. Ru.

After the tip end WS side and end WE side of the wire W are bent toward the reinforcing bar S side, the motor 80 is further driven in the forward rotation direction, thereby moving the actuating member 71 further forward. When the actuating member 71 moves to a predetermined position, the rotation restricting portion 74 is unlocked.

As a result, the motor 80 is further driven in the forward rotation direction, so that the actuating member 71 rotates in conjunction with the rotating shaft 72, and the locking member 70 holding the wire W is integrated with the actuating member 71. Rotate and twist the wire W as shown in FIG. 11E.

After twisting the wire W, the motor 80 is driven in the reverse direction. In the actuating member 71, the rotational movement of the rotating shaft 72 in conjunction with the rotation of the motor 80 is regulated by the rotation regulating portion 74, and the rotation of the motor 80 is converted into linear movement. As a result, the actuating member 71 moves in the direction of arrow A2, which is the rearward direction.

When the actuating member 71 moves backward, the bent portions 71b1 and 71b2 separate from the wire W, and the wire W is no longer held by the bent portions 71b1 and 71b2. Furthermore, when the actuating member 71 moves rearward, the opening/closing pin 71a passes through the opening/closing guide hole 73, as shown in FIG. 10A. As a result, the first movable locking member 70L moves in a direction away from the fixed locking member 70C by a rotational movement using the shaft 76 as a fulcrum. Further, the second movable locking member 70R moves in a direction away from the fixed locking member 70C by a rotational movement about the shaft 76 as a fulcrum. As a result, the wire W is removed from the locking member 70.

12A, FIG. 12B, and FIG. 12C are explanatory diagrams showing the movement of the wire in the guiding guide of the first embodiment. Next, the effect of guiding the wire W with the guiding guide 51A will be described.

As described above, the wire W that is curled by the curl guide 50 heads in another direction that is opposite to the one direction in which the reel 20 is offset. Therefore, in the guide 51A, the wire W entering between the side surface portions 55L and 55R of the first guide portion 55 first enters toward the third guide portion 55R1 of the side surface portion 55R.

Now, in conventional reinforcing bar binding machines, the diameter is about 50 to 70 mm, assuming that the trajectory of the wire that is curled by the curl guide to form a loop is a circle. On the other hand, in the reinforcing bar binding machine 1A, the length in the major axis direction is approximately 75 mm or more and 100 mm or less, assuming that the trajectory of the wire W that is curled by the curl guide 50 and forms the loop Ru is a circle. .

As described above, when the trajectory of the wire W that is curled by the curl guide 50 and forms the loop Ru is assumed to be an ellipse, when the length in the major axis direction is approximately 75 mm or more and 100 mm or less, the The entry angle α1 of the wire W entering toward the guide portion 55R1 of No. 3 is larger than that of the conventional reinforcing bar binding machine.

Therefore, in the guidance guide 51A, when the tip WS of the wire W entering toward the third guide portion 55R1 of the side surface portion 55R comes into contact with the third guide portion 55R1, the tip WS of the wire W enters the third guide portion 55R1. The resistance when being guided along the guide portion 55R1 increases. Therefore, the wire W may not be directed between the narrowest part 55EL2 of the first guiding part 55L1 and the narrowest part 55ER2 of the third guiding part 55R1, and a feeding failure may occur.

Therefore, an approach angle regulating section 56A is provided to direct the tip of the wire W entering toward the third guide section 55R1 of the side surface section 55R between the narrowest section 55EL2 of the first guide section 55L1 and the third guide section 55R1. Direct it between the narrowest parts 55ER2 of 55R1.

That is, the wire W entering between the side surface portion 55L and the side surface portion 55R of the first guide portion 55 enters toward the third guide portion 55R1 of the side surface portion 55R, thereby causing the wire W to enter between the side surface portion 55L and the side surface portion 55R. 55R, the wire W is in contact with the approach angle regulating portion 56A, as shown in FIG. 12B. When the wire W comes into contact with the approach angle regulating part 56A, the tip WS of the wire W contacts the narrowest part 55EL2 of the first guide part 55L1 and the narrowest part of the third guide part 55R1 with the approach angle regulating part 56A as a fulcrum. A force that tends to rotate the wire W is applied to the wire W in a direction toward between the portions 55ER2.

As a result, as shown in FIG. 12C, the entrance angle α2 of the wire W entering toward the third guide portion 55R1 of the side surface portion 55R becomes small (α2<α1), and the tip WS of the wire W It goes between the narrowest part 55EL2 of the guiding part 55L1 and the narrowest part 55ER2 of the third guiding part 55R1. Therefore, the wire W that has been curled by the curl guide 50 can be introduced between the pair of second guide portions 55L2 and fourth guide portions 55R2 of the first guide portion 55.

13A, FIG. 13B, and FIG. 13C are explanatory diagrams showing the locked state of the wires in the locking member. Next, when locking the two wires W in the locking member 70, the two wires W The effect of inducing the parallel orientation will be explained.

In the conventional reinforcing bar binding machine, the wire W was guided to the locking member 70 of the binding part 7A without the wire W coming into contact with the guide surface 57a of the second guide part 57. On the other hand, in the reinforcing bar binding machine 1A, the wire W guided to the second guide part 57 by the first guide part 55L1 and the third guide part 55R1 of the first guide part 55 in the guide guide 51A is As shown in FIGS. 11A and 11B, by contacting the guide surface 57a, it is guided to the locking member 70 of the binding portion 7A.

When the two wires W come into contact with the guide surface 57a, the parallel orientation of the two wires W is regulated by the guide surface 57a, and the connection between the fixed locking member 70C and the second movable locking member 70R occurs. A wire W is guided to.

Since the guide surface 57a is a flat surface, when the two wires W are sent in contact with the guide surface 57a, the two wires W are aligned in the axial direction of the loop Ru formed by the wires W. .

Therefore, as shown in FIG. 13C, the two wires W are arranged in parallel along the direction in which the second movable locking member 70R opens and closes with respect to the fixed locking member 70C. The two wires W are locked in a state where a gap of two wires is formed between the movable locking member 70R and the movable locking member 70R. This increases the load applied to the locking member 70.

Therefore, the direction in which the two wires W are arranged in parallel is guided by the feed regulating section 9A. FIGS. 14A and 14B are explanatory diagrams showing the movement of the wire in the feed regulating section.Next, the effect of guiding the wire W in the feeding regulating section 9A will be explained.

The feed regulating portion 9A extends in a direction intersecting the direction in which the two wires W regulated by the first wire guide 4A ₁ and the second wire guide 4A ₂ are parallel to each other on the surface in contact with the wire W. A parallel regulation section 90 is provided.

Since the parallel regulation part 90 is concave with respect to the feeding direction of the wire W sent in the positive direction, when the tip WS of the wire W is pressed against the feed regulation part 9A, the apex of the concave part forming the parallel regulation part 90 The tip WS of the wire W is guided toward.

As a result, as shown in FIG. 14A, the tips WS of the two wires W passing between the fixed locking member 70C and the second movable locking member 70R reach the position where they are pressed against the feed regulating portion 9A. , when the two wires W are sent in the positive direction, the tips WS of the two wires W are guided along the direction in which the parallel restriction section 90 extends, as shown in FIG. 14B. Therefore, the direction in which the two wires W are arranged in parallel between the fixed locking member 70C and the second movable locking member 70R is guided in the radial direction of the loop Ru shown in FIG.

Therefore, as shown in FIG. 13A, the two wires W can be guided in parallel in a direction intersecting the direction in which the second movable locking member 70R opens and closes with respect to the fixed locking member 70C. Therefore, as shown in FIG. 13B, two wires W are inserted into the fixed locking member 70C and the second movable locking member 70R with a gap that can lock one wire. It becomes a form of locking, reduces the load applied to the locking member 70, and can securely lock the two wires W.

Note that the direction in which the two wires W are arranged in parallel may be guided by a guide. FIG. 15A is a plan view showing the guidance guide according to the second embodiment, FIG. 15B is a perspective view showing the guidance guide according to the second embodiment, and FIG. 15C is a top view showing the guidance guide according to the second embodiment. The front view shown in FIG. 15D is a side view showing the guidance guide of the second embodiment. 15E is a sectional view taken along line BB in FIG. 15A, FIG. 15F is a sectional view taken along line CC in FIG. 15A, FIG. 15G is a sectional view taken along line DD in FIG. FIG. 3 is a cutaway perspective view showing the guiding guide of the embodiment.

In the guidance guide 51B of the second embodiment, the same components as those of the guidance guide 51A of the first embodiment are given the same numbers and the description thereof will be omitted.

The guidance guide 51B of the second embodiment includes a parallel restriction portion 58B on the guide surface 57a. The parallel regulation portion 58B is configured by providing a plurality of surfaces on the guide surface 57a along an axial direction intersecting the radial direction of the loop Ru formed by the wire W. That is, the parallel regulation portion 58B is configured by providing the guide surface 57a with a step along the extending direction of the guide surface 57a. The position where the parallel restriction part 58B is provided is the position where the loop Ru formed by the wire W which has been curled by the curl guide 50 contacts. The parallel restriction portion 58B is concave toward the outside in the radial direction of the loop Ru formed by the wire W with respect to the guide surface 57a.

As a result, as shown in FIG. 15F, one wire W1 of the two wires W guided to the second guide portion 57 is in contact with the guide surface 57a, and the other wire W2 is in contact with the guide surface 57a. 57a is in contact with a concave parallel restriction portion 58B. Therefore, the parallel orientation of the two wires W guided by the second guide portion 57 is shifted in the radial direction of the loop Ru. Therefore, the direction in which the two wires W are arranged in parallel between the fixed locking member 70C and the second movable locking member 70R is guided in the radial direction of the loop Ru.

Therefore, as shown in FIG. 13A, the two wires W can be guided in parallel in a direction intersecting the direction in which the second movable locking member 70R opens and closes with respect to the fixed locking member 70C. Therefore, as shown in FIG. 13B, two wires W are inserted into the fixed locking member 70C and the second movable locking member 70R with a gap that can lock one wire. It becomes a form of locking, reduces the load applied to the locking member 70, and can securely lock the two wires W.

FIG. 16A is a cross-sectional view showing the guide according to the third embodiment, and FIG. 16B is a cutaway perspective view showing the guide according to the third embodiment. In the guidance guide 51C of the third embodiment, the same components as those of the guidance guide 51A of the first embodiment are given the same numbers and the description thereof will be omitted.

The guidance guide 51C of the third embodiment includes a parallel restriction portion 58C on the guide surface 57a. The parallel restriction portion 58C is configured with a surface that is non-parallel to the direction in which the two wires defined by the first wire guide 4A ₁ and the second wire guide 4A ₂ are arranged in parallel. That is, the parallel restriction portion 58C is configured by providing the guide surface 57a with a slope inclined in a direction intersecting the extending direction of the guide surface 57a and along the direction in which the two wires W are lined up. Therefore, the parallel restriction portion 58C is a surface inclined from the second guide portion 55L2 toward the fourth guide portion 55R2. In FIG. 16A, the direction in which the parallel regulation portion 58C is inclined is such that, of the two wires W guided to the second guide portion 57, the wire W located on the second guide portion 55L2 side is formed by the wire W. It is directed downward from the second guiding part 55L2 toward the fourth guiding part 55R2 so as to be located inside the loop Ru in the radial direction. Note that the direction in which the parallel regulating portion 58C is inclined is such that the wire W located on the second guiding portion 55L2 side is located on the outside of the loop Ru formed by the wire W in the radial direction. It may be directed downward from 55R2 toward the second guide portion 55L2.

As a result, one of the two wires W guided to the second guide portion 57 is positioned on the radially outer side of the loop Ru formed by the wire W on the slope forming the parallel restriction portion 58C. The other one is in contact with a surface located inside the loop Ru in the radial direction. Therefore, the parallel orientation of the two wires W guided by the second guide portion 57 is shifted in the radial direction of the loop Ru. Therefore, the direction in which the two wires W are arranged in parallel between the fixed locking member 70C and the second movable locking member 70R is guided in the radial direction of the loop Ru.

FIG. 17A is a cross-sectional view showing the guide according to the fourth embodiment, and FIG. 17B is a cutaway perspective view showing the guide according to the fourth embodiment. In the guidance guide 51D of the fourth embodiment, the same components as those of the guidance guide 51A of the first embodiment are given the same numbers and the description thereof will be omitted.

The guidance guide 51D of the fourth embodiment includes a parallel restriction portion 58D on the guide surface 57a. The parallel restriction portion 58D is configured by providing the guide surface 57a with two slopes that are inclined in a direction that intersects with the extending direction of the guide surface 57a and that is along the direction in which the two wires W are lined up. . In other words, the parallel restriction portion 58D is configured of a groove portion having a V-shaped cross section along the extending direction of the guide surface 57a.

As a result, one of the two wires W guided to the second guide portion 57 is positioned on the radially outer side of the loop Ru formed by the wire W on the slope forming the parallel restriction portion 58D. The other wire is in contact with a surface located inside the loop Ru in the radial direction, or a wire W located outside the loop Ru in the radial direction. Therefore, the parallel orientation of the two wires W guided by the second guide portion 57 is shifted in the radial direction of the loop Ru. Therefore, the direction in which the two wires W are arranged in parallel between the fixed locking member 70C and the second movable locking member 70R is guided in the radial direction of the loop Ru.

FIG. 18A is a sectional view showing the guiding guide according to the fifth embodiment, and FIG. 18B is a cutaway perspective view showing the guiding guide according to the fifth embodiment. In the guidance guide 51E of the fifth embodiment, the same components as those of the guidance guide 51A of the first embodiment are given the same numbers and the description thereof will be omitted.

The guidance guide 51E of the fifth embodiment includes a parallel restriction portion 58E on the guide surface 57a. The parallel regulation portion 58E is configured by providing a groove portion in the guide surface 57a with a U-shaped cross-sectional shape along the extending direction of the guide surface 57a.

As a result, one of the two wires W guided to the second guide portion 57 is positioned on the outside of the loop Ru formed by the wire W in the radial direction on the surface forming the parallel restriction portion 58E. The other wire is in contact with a surface located inside the loop Ru in the radial direction, or a wire W located outside the loop Ru in the radial direction. Therefore, the parallel orientation of the two wires W guided by the second guide portion 57 is shifted in the radial direction of the loop Ru. Therefore, the direction in which the two wires W are arranged in parallel between the fixed locking member 70C and the second movable locking member 70R is guided in the radial direction of the loop Ru.

1A... Rebar binding machine, 10A... Main body, 2A... Magazine (accommodating part), 20... Reel, 21... Hub part, 22, 23... Flange part, 3A...・Wire feeding section, 30L...First feeding gear (feeding member), 31L...Tooth portion, 32L...Groove portion, 30R...Second feeding gear (feeding member), 31R... Tooth portion, 32R... Groove portion, 36... First displacement member, 37... Second displacement member, 38... Spring, 4A ₁ ... First wire guide, 4A ₂ ... -Second wire guide, 5A... Curl forming part, 50... Curl guide, 51A, 51B, 51C, 51D, 51E... Guidance guide, 53... Retraction mechanism, 53a... First Guide pins, 53b...second guide pin, 53c...third guide pin, 55...first guide portion, 55L...side surface portion, 55R...side surface portion, 55D. ...Bottom part, 55L1...First guide part, 55L2...Second guide part, 55R1...Third guide part, 55R2...Fourth guide part, 55S...Focusing Passage, 55E1...Open end, 55E2...Narrowest part, 55EL1...Open end, 55ER1...Open end, 55EL2...Narrowest part, 55ER2...Narrowest part, 55EL3... Virtual line, 56A... Approach angle regulating section, 57... Second guide section, 57a... Guide surface, 58A, 58B, 58C, 58D, 58E... Parallel regulating section, 6A ... Cutting part, 60... Fixed blade part, 61... Movable blade part, 62... Transmission mechanism, 7A... Binding part, 70... Locking member, 70L... First Movable locking member, 70R...Second movable locking member, 70C...Fixed locking member, 71...Operating member, 71a...Opening/closing pin, 71b1...Bending portion, 71b2. ...Bending part, 72...Rotating shaft, 73...Opening/closing guide hole, 74...Rotation regulating part, 8A...Drive part, 80...Motor, 81...Reducer, 9A... ...Feed regulation section, 90...Parallel regulation section, W...Wire

Claims (7)

a wire feeding unit that sends two wires to be wound around a bundle;
a wire guide that arranges the two wires in parallel along the axial direction of a loop formed by the two wires;
The loop has a pair of locking members that move in directions that move toward and away from each other along the axial direction of the loop, and when the loop is wound around a bundle and the pair of locking members move in a direction that approaches each other, the locking is performed. a binding part that twists the wire that is locked to the member;
a curl guide that creates a loop-like curl in the wire fed by the wire feeding section;
a guiding guide that guides the wire that has been curled by the curl guide between the pair of locking members ;
a parallel regulation part that guides the direction in which the two wires passed between the pair of locking members are lined up in the radial direction of the loop ;
The parallel regulating section is configured by providing a recess against which a tip of the wire is abutted in a feeding regulating section that regulates the feeding of the wire fed by the wire feeding section.
Binding machine. 2. The parallel regulation part is configured by providing a recessed part extending in a direction crossing a direction in which the two wires are arranged in parallel defined by the wire guide on a surface of the feed regulation part in contact with the wires. 1. The binding machine according to 1. a wire feeding unit that sends two wires to be wound around a bundle;
a wire guide that arranges the two wires in parallel along the axial direction of a loop formed by the two wires;
The loop has a pair of locking members that move in directions that move toward and away from each other along the axial direction of the loop, and when the loop is wound around a bundle and the pair of locking members move in a direction that approaches each other, the locking is performed. a binding part that twists the wire that is locked to the member;
a curl guide that creates a loop-like curl in the wire fed by the wire feeding section;
a guiding guide that guides the wire that has been curled by the curl guide between the pair of locking members;
a parallel regulation part that guides the direction in which the two wires passed between the pair of locking members are lined up in the radial direction of the loop;
The guidance guide includes a guide surface on the outside in the radial direction of the loop formed of a wire that is curled by the curl guide,
In the binding machine, the parallel regulation section is configured by providing a plurality of surfaces on the guide surface along the axial direction of the loop formed of wire. 4. The binding machine according to claim 3 , wherein the parallel regulation section is configured by providing a step on the guide surface that is concave or convex in the radial direction of the loop formed of wire. a wire feeding unit that sends two wires to be wound around a bundle;
a wire guide that arranges the two wires in parallel along the axial direction of a loop formed by the two wires;
The loop has a pair of locking members that move in directions that move toward and away from each other along the axial direction of the loop, and when the loop is wound around a bundle and the pair of locking members move in a direction that approaches each other, the locking is performed. a binding part that twists the wire that is locked to the member;
a curl guide that creates a loop-like curl in the wire fed by the wire feeding section;
a guiding guide that guides the wire that has been curled by the curl guide between the pair of locking members;
a parallel regulation part that guides the direction in which the two wires passed between the pair of locking members are lined up in the radial direction of the loop;
The guidance guide includes a guide surface on the outside in the radial direction of the loop formed of a wire that is curled by the curl guide,
In the binding machine, the parallel regulation section is configured by providing the guide surface with a surface that is non-parallel to the direction in which the two wires are arranged in parallel, which is defined by the wire guide. The binding machine according to claim 5 , wherein the parallel restriction section is configured by providing a recess in the guide surface . The binding machine according to claim 5 , wherein the parallel restriction section is configured by providing a slope on the guide surface .

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