JP7293880B2 - binding machine - Google Patents

Description

The present invention relates to a binding machine for binding objects such as reinforcing bars with wires.

A binding wire feed mechanism that feeds out a wire wound on a reel and winds it around a reinforcing bar, a gripping mechanism that grips the wire wound around the reinforcing bar, and a binding wire twisting mechanism that rotates the gripping mechanism to twist the wire. Conventionally, a reinforcing bar binding machine has been proposed in which a binding wire feed mechanism, a gripping mechanism, and a binding wire twisting mechanism are operated in order by a trigger operation to perform one cycle of binding operation (see, for example, Patent Document 1). .

In such a binding machine, a means has been proposed in which the tip of the wire wound around the reinforcing bar is gripped by a gripping mechanism and the surplus wire is pulled back to wind the wire around the reinforcing bar, thereby improving the binding force.

JP-A-2003-34305

In order to further improve the binding force, a binding machine using two wires has also been proposed. In order to grip two wires with the clamp plate, the two wires can be securely gripped if the two wires are arranged side by side crossing the direction in which the clamp plate opens and closes.

On the other hand, if two wires are arranged side by side in the direction in which the clamp plate opens and closes, and the two wires are gripped by the clamp plate, the clamp plate cannot be closed to a predetermined position, and the clamp plate cannot be closed. The load involved increases. In addition, if an increase in the load applied to the clamp plate is detected and the bundling operation is interrupted, work efficiency will be deteriorated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a binding machine that can eliminate the problem that two wires are arranged side by side in a predetermined direction.

In order to solve the above-described problems, the present invention has a wire feeding section that feeds two wires wound around a bundle, and at least a pair of locking members that can be opened and closed. A binding section for twisting the locked two wires, and a control section for executing an operation to eliminate the parallelism of the two wires along the direction in which the pair of locking members open and close , wherein the control section is , the parallel state of two wires passing between a pair of locking members, and estimating that the two wires are parallel along the direction in which the pair of locking members open and close, the pair of It is a binding machine that eliminates the parallelism of two wires along the direction in which the locking member opens and closes .

In addition, the present invention has a wire feeding section for feeding two wires wound around a bundle, and at least a pair of locking members that can be opened and closed, and the two wires locked by closing the pair of locking members. A binding comprising a binding part for twisting a wire, and a control part for closing the pair of locking members after closing the pair of locking members and then closing the pair of locking members again before twisting the wire in the binding part. machine.
Furthermore, the present invention includes a wire feeding section that feeds two wires wound around a bundle, a wire guide that parallels the two wires W along the axial direction of the loop formed by the two wires, A binding part that has at least a pair of locking members that can be opened and closed along the axial direction of the loop, and twists the two wires locked by closing the pair of locking members, and a pair of locking members. and a controller for executing an operation to eliminate the parallelism of the two wires along the direction of opening and closing.

The pair of locking members is arranged in such a manner that the parallelism of the two wires along the direction in which the pair of locking members is opened and closed is eliminated, and the two wires are arranged in parallel crossing the direction in which the pair of locking members open and close. Two wires can be locked between.

In the present invention, since two wires can be locked between a pair of locking members in a form in which two wires are arranged in parallel so as to intersect in the direction in which the pair of locking members open and close, the load applied to the binding member can be reduced. can be reduced. Moreover, the binding operation can be continued, and deterioration of work efficiency can be suppressed.

1 is a configuration diagram seen from the side showing an example of the overall configuration of a reinforcing bar binding machine; FIG. It is a configuration diagram seen from the side showing an example of the configuration of a main part of a reinforcing bar binding machine. It is a partially broken perspective view which shows an example of a principal part structure of a reinforcing-bar binding machine. 1 is a configuration diagram seen from the front showing an example of the overall configuration of a reinforcing bar binding machine; FIG. FIG. 3 is a cross-sectional view taken along line AA of FIG. 2; It is an external appearance side view of a reinforcing-bar binding machine. It is an external appearance top view of a reinforcing-bar binding machine. It is an external appearance front view of a reinforcing bar binding machine. It is a front view which shows an example of a wire feed part. It is a top view which shows an example of a wire feed part. It is a top view which shows an induction guide. It is a perspective view which shows an induction guide. It is a plane sectional view which shows an example of a binding part and a drive part. It is a plane sectional view which shows an example of a binding part and a drive part. It is a sectional side view which shows an example of a binding part and a drive part. FIG. 3 is a functional block diagram showing an example of control functions of a reinforcing bar binding machine having a current detector; FIG. 4 is an operation explanatory diagram showing an example of an operation of binding reinforcing bars with a wire; FIG. 4 is an operation explanatory diagram showing an example of an operation of binding reinforcing bars with a wire; FIG. 4 is an operation explanatory diagram showing an example of an operation of binding reinforcing bars with a wire; FIG. 4 is an operation explanatory diagram showing an example of an operation of binding reinforcing bars with a wire; FIG. 4 is an operation explanatory diagram showing an example of an operation of binding reinforcing bars with a wire; It is explanatory drawing which shows the locking state of the wire in a locking member. It is explanatory drawing which shows the locking state of the wire in a locking member. It is explanatory drawing which shows the locking state of the wire in a locking member. 4 is a flow chart showing a first embodiment of control for arranging two wires in parallel in a predetermined direction; FIG. 10 is an operation explanatory diagram showing an example of an operation of arranging two wires in parallel in a predetermined direction; FIG. 10 is an operation explanatory diagram showing an example of an operation of arranging two wires in parallel in a predetermined direction; FIG. 10 is an operation explanatory diagram showing an example of an operation of arranging two wires in parallel in a predetermined direction; FIG. 10 is an operation explanatory diagram showing an example of an operation of arranging two wires in parallel in a predetermined direction; FIG. 10 is an operation explanatory diagram showing an example of an operation of arranging two wires in parallel in a predetermined direction; FIG. 10 is an operation explanatory diagram showing an example of an operation of arranging two wires in parallel in a predetermined direction; FIG. 10 is an operation explanatory diagram showing an example of an operation of arranging two wires in parallel in a predetermined direction; FIG. 10 is an operation explanatory diagram showing an example of an operation of arranging two wires in parallel in a predetermined direction; FIG. 10 is an operation explanatory diagram showing an example of an operation of arranging two wires in parallel in a predetermined direction; 7 is a flow chart showing a second embodiment of control for arranging two wires in parallel in a predetermined direction; 9 is a flow chart showing a third embodiment of control for arranging two wires in parallel in a predetermined direction; It is a partially broken perspective view which shows the other example of the principal part structure of a reinforcing-bar binding machine. FIG. 10 is a cross-sectional view showing another example of the main configuration of the reinforcing bar binding machine; FIG. 11 is an operation explanatory diagram showing an example of an operation of parallelizing two wires in a predetermined direction in a configuration including a parallel restricting portion; FIG. 11 is an operation explanatory diagram showing an example of an operation of parallelizing two wires in a predetermined direction in a configuration including a parallel restricting portion; FIG. 11 is an operation explanatory diagram showing an example of an operation of parallelizing two wires in a predetermined direction in a configuration including a parallel restricting portion; FIG. 11 is an operation explanatory diagram showing an example of an operation of parallelizing two wires in a predetermined direction in a configuration including a parallel restricting portion; FIG. 11 is an operation explanatory diagram showing an example of an operation of parallelizing two wires in a predetermined direction in a configuration including a parallel restricting portion; FIG. 11 is an operation explanatory diagram showing an example of an operation of parallelizing two wires in a predetermined direction in a configuration including a parallel restricting portion; FIG. 11 is an operation explanatory diagram showing an example of an operation of parallelizing two wires in a predetermined direction in a configuration including a parallel restricting portion; FIG. 11 is an operation explanatory diagram showing an example of an operation of parallelizing two wires in a predetermined direction in a configuration including a parallel restricting portion; FIG. 11 is an operation explanatory diagram showing an example of an operation of parallelizing two wires in a predetermined direction in a configuration including a parallel restricting portion; It is explanatory drawing which shows the movement of the wire in a feed control part. It is explanatory drawing which shows the movement of the wire in a feed control part. FIG. 10 is a flow chart showing a fourth embodiment of control for arranging two wires in parallel in a predetermined direction; FIG. It is a side view which shows an example of the principal part structure of the reinforcement binding machine provided with the parallel detection sensor. FIG. 10 is a side view showing another example of the main configuration of the reinforcing bar binding machine provided with the parallel detection sensor; FIG. 2 is a cross-sectional view showing an example of a main configuration of a reinforcing bar binding machine provided with a parallel detection sensor; FIG. 10 is a cross-sectional view showing another example of the main configuration of a reinforcing bar binding machine provided with a parallel detection sensor; FIG. 3 is a functional block diagram showing an example of control functions of a reinforcing bar binding machine provided with a parallel detection sensor; 10 is a flow chart showing a fifth embodiment of control for arranging two wires in parallel in a predetermined direction; FIG. 10 is a side view showing an example of a main configuration of a reinforcing bar binding machine provided with a parallel elimination member; FIG. 3 is a cross-sectional view showing an example of a configuration of a main part of a reinforcing bar binding machine provided with a parallel elimination member; FIG. 10 is a top view showing an example of a main configuration of a reinforcing bar binding machine provided with a parallel elimination member; FIG. 4 is a functional block diagram showing an example of control functions of a reinforcing bar binding machine provided with a parallel elimination member; FIG. 11 is a flow chart showing a sixth embodiment of control for arranging two wires in parallel in a predetermined direction; FIG. It is explanatory drawing which shows a movement of the wire in an induction guide. It is explanatory drawing which shows a movement of the wire in an induction guide. It is explanatory drawing which shows a movement of the wire in an induction guide.

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

<Configuration example of rebar binding machine>
FIG. 1 is a configuration diagram seen from the side showing an example of the overall configuration of the reinforcing bar binding machine, FIG. 2 is a configuration diagram seen from the side showing an example of the configuration of the main parts of the reinforcing bar binding machine, and FIG. 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 the line AA in FIG. . 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 feeds the wire W in the forward direction indicated by the arrow F, winds it around the reinforcing bar S which is the object to be bound, and rotates the wire W wound around the reinforcing bar S in the opposite direction indicated by the arrow R. After being sent and wound around the reinforcing bar S, the wire W is twisted and the reinforcing bar S is bound with the wire W.例文帳に追加

The reinforcing bar binding machine 1A includes a magazine 2A in which wires W are stored and a wire feeding section 3A for feeding wires W in order to realize the functions described above. In addition, the reinforcing bar binding machine 1A has a first wire guide 4A1 for guiding the wire W drawn into the wire feeding section 3A in the operation of feeding the wire W in the positive direction by the wire feeding section 3A, and a wire guide _4A1 for guiding the wire W drawn into the wire feeding section 3A. A second wire guide _4A2 is provided for guiding the wire W to be drawn.

Further, the reinforcing bar binding machine 1A includes a curl forming section 5A that configures a path for winding the wire W sent by the wire feeding section 3A around the reinforcing bar S. As shown in FIG. The reinforcing bar binding machine 1A also has a cutting section 6A for cutting the wire W wound around the reinforcing bar S and a wire W wound around the reinforcing bar S by twisting the wire W wound around the reinforcing bar S by feeding the wire W in the opposite direction with the wire feeding section 3A. and a driving portion 8A for driving the binding portion 7A.

The magazine 2A is an example of a storage unit, and stores a reel 20 on which a long wire W is wound so as to be able to be fed out, in a rotatable and detachable manner. As the wire W, a wire composed of a plastically deformable metal wire, a wire in which the metal wire is coated with resin, or a stranded wire is used.

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

As shown in FIGS. 4A and 4B, the magazine 2A is arranged 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 _4A1 and the second wire guide _4A2 . The reel 20 is attached while being 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 feed path FL of the wire W. As shown in FIG.

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 described. The wire feeding section 3A is provided with a first feeding gear 30L and a second feeding gear 30R for feeding the wire W by rotating motion as a pair of feeding members for sandwiching and feeding two wires W arranged in parallel.

The first feed gear 30L has a tooth portion 31L for transmitting driving force. The tooth portion 31L has a shape constituting a spur gear in this example, and is formed along the entire outer circumference of the first feed gear 30L. Further, the first feed gear 30L has a groove portion 32L into which the wire W is inserted. In this example, the groove portion 32L is a concave portion having a substantially V-shaped cross section, and is formed along the entire circumference of the outer circumference of the first feed gear 30L along the circumferential direction.

The second feed gear 30R has a tooth portion 31R for transmitting driving force. The tooth portion 31R has a shape constituting a spur gear in this example, and is formed all around the outer circumference of the second feed gear 30R. The second feed gear 30R also has a groove 32R into which the wire W is inserted. In this example, the groove portion 32R is formed by a concave portion having a substantially V-shaped cross section, and is formed along the entire circumference of the outer circumference of the second feed gear 30R along the circumferential direction.

In the wire feeding portion 3A, the groove portion 32L of the first feed gear 30L and the groove portion 32R of the second feed gear 30R are opposed to each other, and the first feed gear 30L and the second feed gear 30R form a first wire guide. It is provided so as to sandwich the feeding path FL of the wire W defined by 4A- ₁ and the second wire guide 4A- ₂ . The feeding path FL of the wire W becomes the width center position of the wire feeding portion 3A formed by the pair of the first feeding gear 30L and the second feeding gear 30R. Then, as shown in FIG. 4B and the like, the reel 20 is arranged in a state of being offset in one direction with respect to the width center position of the wire feeding section 3A.

The wire feed section 3A is configured to be displaceable in directions in which the first feed gear 30L and the second feed gear 30R approach and separate from each other. In this example, the second feed gear 30R is displaced with respect 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 feeding section 3A. The wire feed section 3A also includes a first displacement member 36 that displaces the second feed gear 30R in the direction toward and away from the first feed gear 30L. The first displacement member 36 rotatably supports the second feed gear 30R on one end side via a shaft 300R. Further, the first displacement member 36 is rotatably supported by the support member 301 at the other end with the shaft 36a as a fulcrum.

The wire feeding section 3A includes a second displacement member 37 that displaces the first displacement member 36. As shown in FIG. The first displacement member 36 is connected to one end of the second displacement member 37 . 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 with the shaft 37a as a fulcrum.

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

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 The wire W is sandwiched between the groove 32L of the first feed gear 30L and the groove 32R of the second feed gear 30R such that the other wire W enters the groove 32R of the feed gear 30R.

The wire feeding portion 3A is configured to feed the wire W between the groove portion 32L of the first feed gear 30L and the groove portion 32R of the second feed gear 30R while the wire W is sandwiched between the tooth portion 31L of the first feed gear 30L and the second feed gear 30L. , the teeth 31R of the feed gear 30R mesh with each other. As a result, a rotational driving force is transmitted between the first feed gear 30L and the second feed gear 30R.

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

The first feed gear 30L is rotated by the rotational motion of a feed motor 33, which will be described later. The rotation of the first feed gear 30L is transmitted to the second feed gear 30R by the engagement between the teeth 31L and the teeth 31R, and the second feed gear 30R rotates following the first feed gear 30L.

Thereby, the wire feeder 3A feeds the wire W sandwiched between the first feed gear 30L and the second feed gear 30R along the extending direction of the wire W. As shown in FIG. In the configuration for feeding two wires W, the frictional force generated between the groove 32L of the first feed gear 30L and one of the wires W, and the friction between the groove 32R of the second feed gear 30R and the other wire W The two wires W are fed in parallel due to the frictional force generated and the frictional force generated between one wire W and the other wire W.

The wire feed unit 3A switches the rotation direction of the feed motor 33 between forward and reverse, thereby switching the rotation directions of the first feed gear 30L and the second feed gear 30R, thereby switching the forward and reverse feeding direction of the wire W. be done.

Next, a wire guide that guides the feeding of the wire W will be described. As shown in FIG. 4B, the first wire guide _4A1 is arranged upstream of the first feed gear 30L and the second feed gear 30R with respect to the feed direction of the wire W fed in the positive direction. Also, 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 fed forward.

The first wire guide 4A ₁ and the second wire guide 4A ₂ have guide holes 40A through which the wires W pass. In the reinforcing bar binding machine 1A, the path of the wire W fed by the wire feeding section 3A is restricted by the curl forming section 5A, so that the trajectory of the wire W forms a loop Ru as indicated by the dashed line in FIG. wrapped around S.

When the direction crossing 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 _4A1 and the second wire guide _4A2 are arranged in the axial direction of the loop Ru. It is constructed in a shape in which two wires W are passed in parallel along the same. The direction in which the two wires W are arranged is also the direction in which the first feed gear 30L and the second feed gear 30R are arranged.

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.

The first wire guide 4A ₁ and the second wire guide 4A ₂ have an opening area larger than that of the downstream side of the wire introduction portion, which is upstream of the guide hole 40A with respect to the feeding direction of the wire W fed in the positive direction. It has a tapered shape, such as a conical shape or a pyramidal shape with a larger diameter. This facilitates the introduction of the wire W into the first wire guide _4A1 and the second wire guide _4A2 .

Next, the curl forming section 5A that constitutes the feed path of the wire W for winding the wire W around the reinforcing bar S will be described. The curl forming section 5A includes a curl guide 50 for imparting curl to the wire W fed by the first feed gear 30L and the second feed gear 30R, and a binding section 7A for binding the wire W curled by the curl guide 50. It is provided with a guidance guide 51A that guides to.

The curl guide 50 includes a guide groove 52 forming a feeding path of the wire W, and a first guide pin 53a and a second guide pin 53b as guide members for imparting curl to the wire W in cooperation with the guide groove 52. and a third guide pin 53c. The curl guide 50 has a configuration in which a guide plate 50L, a guide plate 50C, and a guide plate 50R are laminated, and the guide surface of the guide groove 52 is formed by the guide plate 50C. Further, the guide plates 50L and 50R form side wall surfaces standing from the guide surface of the guide groove 52. As shown in FIG.

The first guide pin 53a is provided on the introduction portion side of the wire W fed in the forward direction by the first feed gear 30L and the second feed gear 30R in the curl guide 50 . The first guide pin 53 a is arranged radially inside the loop Ru formed by the wire W with respect to the feed path of the wire W formed by the guide groove 52 . The first guide pin 53a regulates the feed path of the wire W so that the wire W fed along the guide groove 52 does not enter 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 53 b is arranged radially outside the loop Ru formed by the wire W with respect to the feed path of the wire W along the guide groove 52 . A part of the peripheral surface of the second guide pin 53 b protrudes from the guide groove 52 . As a result, 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 on the discharge portion side of the wire W fed forward in the curl guide 50 by the first feed gear 30L and the second feed gear 30R. The third guide pin 53 c is arranged radially outside the loop Ru formed by the wire W with respect to the feed path of the wire W along the guide groove 52 . A part of the peripheral surface of the third guide pin 53 c protrudes from the guide groove 52 . As a result, 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, thereby moving the wire in opposite directions with the first feed gear 30L and the second feed gear 30R. By feeding W, the first guide pin 53a is retracted from the path along which the wire W wound around the reinforcing bar S moves.

Next, the effect of giving the wire W a curl will be described. The wire W fed in the positive direction by the first feed gear 30L and the second feed gear 30R is divided into two radially outer points of the loop Ru formed by the wire W and an inner one point between these two points. By restricting the radial position of the loop Ru formed by the wire W at at least three points, the wire W is given a loop-like curl.

In this example, a second wire guide 4A2 provided upstream of the first guide pin 53a and a wire guide _4A2 provided downstream of the first guide pin 53a with respect to the feed direction of the wire W fed in the positive direction. The radially outer position of the loop Ru formed by the wire W is regulated by 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 forwarded in the forward direction by the first feed gear 30L and the second feed gear 30R is given a looped curl.

By providing the second guide pin 53b in the guide groove 52 at the position outside the loop Ru formed by the wire W in the radial direction and in contact with the wire W sent to the third guide pin 53c, Wear of the guide groove 52 can be prevented.

FIG. 9A is a plan view showing an induction guide, and FIG. 9B is a perspective view showing the induction guide. As shown in FIG. 4A, the guiding guide 51A is 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 _4A1 and the second wire guide _4A2 . It is provided at a position offset in the other direction, which is the opposite direction.

The guiding guide 51A includes a first guide portion 55 that regulates the axial position of the loop Ru formed by the wire W that is curled by the curl guide 50, and a radial direction of the loop Ru formed by the wire W. A second guide portion 57 is provided for regulating the position of the .

The first guide portion 55 is provided on the side of the second guide portion 57 to which the wire W that has been curled by the curl guide 50 is introduced. The first guide portion 55 has a side portion 55L on one side, which is the side located in one direction in which the reel 20 is offset. Also, the first guide portion 55 has a side portion 55R facing the side portion 55L on the other side, which is the side opposite to the one direction in which the reel 20 is offset. Further, 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 on one side and the side surface portion 55R standing on the other side.

The second guide portion 57 has a guide surface 57a formed by a surface extending toward the binding portion 7A along the feeding direction of the wire W on the radially outer side of the loop Ru formed by the wire W. As shown in FIG.

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 second guide portion 55L1 that guides the wire W along the guide surface 57a. 2 guide portions 55L2 are provided.

The other side 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 are provided.

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

In the first guide portion 55, the distance between the first guide portion 55L1 and the third guide portion 55R1 becomes narrower from the open end portion 55E1 toward the guide surface 57a of the second guide portion 57. As shown in FIG. As a result, the first guide portion 55 is such that the distance between the first guide portion 55L1 and the third guide portion 55R1 is the same as the opening end portion 55EL1 of the first guide portion 55L1 located at the opening end portion 55E1 and the opening end portion 55EL1 of the first guide portion 55L1 located at the opening end portion 55E1. 3 and the open end 55ER1 of the guide portion 55R1.

Also, in the first guide portion 55, the second guide portion 55L2 connected to the first guide portion 55L1 is positioned on one side of the guide surface 57a of the second guide portion 57, and the third guide portion 55R1 is positioned on one side. A fourth guide portion 55R2 connected to the second guide surface 55R2 is positioned on the other side of the guide surface 57a. The second guide portion 55L2 and the fourth guide portion 55R2 face each other in parallel with a predetermined gap equal to or greater than the radial width of the two wires W arranged in parallel.

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

As a result, the guide 51A has the narrowest portion 55E2 of the converging passage 55S between the narrowest portion 55EL2 of the first guiding portion 55L1 and the narrowest portion 55ER2 of the third guiding portion 55R1. In the guidance guide 51A, the cross-sectional area of the convergence passage 55S gradually narrows from the open end 55E1 toward the narrowest portion 55E2 along the direction in which the wire W enters.

The guidance guide 51A includes an entrance angle regulating portion 56A that changes the entrance angle of the wire W entering the convergence passage 55S so that it faces the narrowest portion 55E2.

In the reinforcing bar binding machine 1A, the reels 20 are arranged offset in one direction. The wire W fed from the reel 20 offset in one direction by the wire feeder 3A and curled by the curl guide 50 is fed in the other direction opposite to the one direction in which the reel 20 is offset. head to

Therefore, the wire W entering the converging passage 55S between the side portion 55L and the side portion 55R of the first guide portion 55 first enters the third guiding portion 55R1 of the side portion 55R. 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 portion 55E2 of the converging passage 55S. Therefore, an approach angle restricting portion 56A is provided in the first guiding portion 55L1 of the side portion 55L facing the side portion 55R.

The approach angle regulating portion 56A is defined by a virtual line connecting the opening end portion 55E1 and the narrowest portion 55E2 of the converging passage 55S, in this example, the opening end portion 55EL1 of the first guiding portion 55L1 and the narrowest portion 55EL2. It is provided at a position that protrudes inward from the imaginary line 55EL3 that is on the side portion 55R side of the imaginary line 55EL3. In this example, the approach angle regulating portion 56A is configured such that the portion near the middle between the opening end portion 55EL1 and the narrowest portion 55EL2 of the first guide portion 55L1 is shaped to be convex in the direction of the third guide portion 55R1. be. As a result, the first guide portion 55L1 has a bent shape in a plan view shown in FIG. 9A.

The wire curled by the curl guide 50 is introduced between the pair of side portions 55L and 55R of the first guide portion 55. As shown in FIG. The guiding guide 51A regulates the position of the loop Ru formed by the wire W along the axial direction by the first guiding portion 55L1 and the third guiding portion 55R1 of the first guide portion 55, and the second guiding portion 55L1 and the third guiding portion 55R1. It is guided to the guide surface 57a of the portion 57. As shown in FIG.

Further, the guidance guide 51A moves the position along the axial direction of the loop Ru formed by the wire W guided on the guide surface 57a of the second guide portion 57 to the second guidance portion of the first guide portion 55. 55L2 and the fourth guide portion 55R2, and the radial position of the loop Ru formed by the wire W is regulated by the guide surface 57a of the second guide portion 57. As shown in FIG.

The guiding guide 51A has a second guide portion 57 fixed to the main body portion 10A of the reinforcing bar binding machine 1A and a first guide portion 55 fixed to the second guide portion 57 in this example. The first guide portion 55 may be supported by the second guide portion 57 so as to be rotatable about the shaft 55b. In such a configuration, the first guide portion 55 moves toward and away from the curl guide 50 while the open end portion 55E1 side of the first guide portion 55 is biased by a spring (not shown) toward the curl guide 50 . It is configured so that it can be opened and closed. As a result, after the reinforcing bar S is bound with the wire W, the first guide portion 55 is retracted by the action of pulling out the reinforcing bar binding machine 1A from the reinforcing bar S, thereby facilitating the action of pulling out the reinforcing bar binding machine 1A from the reinforcing bar S. .

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

The movable blade portion 61 cuts the wire W passing through the opening 60a of the fixed blade portion 60 by a rotational operation about the fixed blade portion 60 as a fulcrum axis. The transmission mechanism 62 transmits the operation of the binding portion 7A to the movable blade portion 61, rotates the movable blade portion 61 in conjunction with the operation of the binding portion 7A, and cuts the wire W. As shown in FIG.

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

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

The binding portion 7A includes a locking member 70 that locks the wire W, an operating member 71 that opens and closes the locking member 70, and a rotary shaft 72 that operates the locking member 70 and the operating member 71. As shown in FIG.

The locking member 70 includes a first movable locking member 70L, a second movable locking member 70R, and a fixed locking member 70C. The second movable locking member 70R and the fixed locking member 70C constitute a pair of locking members. In the locking member 70, the distal end side of the first movable locking member 70L is positioned on one side with respect to the fixed locking member 70C, and the distal end side of the second movable locking member 70R is positioned on 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 with a shaft 76. As shown in FIG. As a result, the locking member 70 rotates around the shaft 76 to open and close in the direction in which the distal end side of the first movable locking member 70L moves away from and contacts the fixed locking member 70C. Also, the distal end side of the second movable locking member 70R opens and closes in the direction of separating and contacting the fixed locking member 70C.

The actuating member 71 and the rotating shaft 72 are arranged so that the rotational movement of the rotating shaft 72 is controlled by the screw portion provided on the outer periphery of the rotating shaft 72 and the nut portion provided on the inner periphery of the actuating member 71 as indicated by arrows A1 and A2. This translates into forward and backward movement of the actuating member 71 along the axial direction of 72 . The operating member 71 includes an opening/closing pin 71a for opening and closing the first movable locking member 70L and the second movable locking member 70R.

The opening/closing pin 71a is inserted into an 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 operating member 71, and the linear movement of the opening/closing pin 71a, which moves in conjunction with the operating member 71, is controlled by the shaft 76 as a fulcrum. It has a shape that converts to an opening/closing operation by rotation of the member 70L and the second movable locking member 70R. Although FIGS. 10A and 10B show the opening/closing guide hole 73 provided in the first movable locking member 70L, the second movable locking member 70R also has a symmetrical opening/closing hole. A guide hole 73 is provided.

In the binding portion 7A, the side provided with the locking member 70 is defined as the front side, and the side provided with the operation member 71 is defined as the rear side. As the operating member 71 moves in the rearward direction indicated by the arrow A2, the locking member 70 is moved to the first movable locking member as shown in FIG. 70L and the second movable locking member 70R are moved away from the fixed locking member 70C by rotational motion about the shaft 76 as a fulcrum.

As a result, the first movable locking member 70L and the second movable locking member 70R are opened with respect to the fixed locking member 70C, and a gap is formed 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 fed by the first feed gear 30L and the second feed gear 30R are guided by the first wire guide 4A ₁ and the second wire guide 4A ₂ and pass between the fixed locking member 70C and the first movable locking member 70L. A 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, which is curled at the curl forming portion 5A and guided to the binding portion 7A, passes between the fixed locking member 70C and the second movable locking member 70R.

When the operating member 71 moves in the forward direction indicated by the arrow A1, the locking member 70 is moved to the first movable locking member by the trajectory of the opening/closing pin 71a and the shape of the opening/closing guide hole 73, as shown in FIG. 10B. 70L and the second movable locking member 70R move toward the fixed locking member 70C by rotating with the shaft 76 as a fulcrum. This closes the first movable locking member 70L and the second movable locking member 70R with respect to the fixed locking member 70C.

When the first movable locking member 70L is closed 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 moved to the first movable locking member. It is locked in such a manner that it can move between the stop member 70L and the fixed locking member 70C. Further, when the second movable locking member 70R is closed 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 pulled from the second locking member 70R. It is locked in such a manner that it cannot be pulled out from between the movable locking member 70R and the fixed locking member 70C.

The operating member 71 has a bending portion 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 that is the other end of the wire W cut by the cutting portion 6A. is bent in a predetermined direction.

By moving in the forward direction indicated by the arrow A1, the operating member 71 pushes the tip WS side of the wire W locked by the fixed locking member 70C and the second movable locking member 70R with the bent portion 71b1, thereby bending the reinforcing bar. Bend to the S side. In addition, the operating member 71 moves forward as indicated by the arrow A1, is locked by the fixed locking member 70C and the first movable locking member 70L, and is the terminal end of the wire W cut at the cutting portion 6A ( WE) side is pushed by the bending portion 71b2 and bent to the reinforcing bar S side.

The binding portion 7A includes a rotation restricting portion 74 that restricts the rotation of the locking member 70 and the operating member 71 that are interlocked with the rotation of the rotating shaft 72 . The rotation restricting portion 74 is provided on the operating member 71 . The rotation restricting portion 74 is locked by a locking portion (not shown) in a motion range in which the wire W is locked by the locking member 70 and in a motion region in which the wire W is bent by the bending portions 71b1 and 71b2 of the operating member 71 . As a result, the rotation of the operating member 71 interlocked with the rotation of the rotating shaft 72 is restricted, and the rotating motion of the rotating shaft 72 causes the operating member 71 to move in the front-rear direction. In addition, the rotation regulating portion 74 is unlocked from a locking portion (not shown) in an operation range in which the wire W locked by the locking member 70 is twisted, and is interlocked with the rotation of the rotating shaft 72 to rotate the operating member. 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. FIG.

The drive unit 8A includes a motor 80 and a speed reducer 81 for reducing speed and amplifying torque. The binding section 7A and the driving section 8A are connected by a rotary shaft 72 and a motor 80 via a speed reducer 81, and the rotary shaft 72 is driven by the motor 80 via a speed reducer 81. As shown in FIG.

The retraction mechanism 53 of the first guide pin 53a described above is configured by a link mechanism that converts the movement of the operating member 71 in the front-rear direction into displacement of the first guide pin 53a. Further, the transmission mechanism 62 of the movable blade portion 61 is configured by a link mechanism that converts the movement of the operating member 71 in the front-rear direction into the rotational motion of the movable blade portion 61 .

Next, the feed regulating portion 9A that regulates the feeding of the wire W will be described. The feed restricting portion 9A is configured by providing a member against which the tip WS of the wire W abuts 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, the feed restricting portion 9A is formed integrally with a guide plate 50R that constitutes the curl guide 50 in this example, and protrudes from the guide plate 50R in a direction that intersects the feed path of the wire W. do.

Next, the shape of the reinforcing bar binding machine 1A will be described. The reinforcing bar binding machine 1A is held in the hand of an operator for use, and includes a main body portion 10A and a handle portion 11A. In the reinforcing bar binding machine 1A, the curl guide 50 and the guide guide 51A of the curl forming section 5A described above are provided at the front end of the main body 10A. Further, in the reinforcing bar binding machine 1A, the handle portion 11A extends downward from the main body portion 10A. Furthermore, a battery 15A is detachably attached to the lower portion of the handle portion 11A. Further, the reinforcing bar binding machine 1A is provided with a magazine 2A in front of the handle portion 11A. In the reinforcing bar binding machine 1A, the wire feeding section 3A, the cutting section 6A, the binding section 7A, the driving section 8A for driving the binding section 7A, and the like are housed in the main body section 10A.

Next, the operating section of the reinforcing bar binding machine 1A will be described. The reinforcing bar binding machine 1A is provided with a trigger 12A on the front side of a handle portion 11A and a switch 13A inside the handle portion 11A.

FIG. 11 is a functional block diagram showing an example of control functions of a reinforcing bar binding machine having a current detector. The reinforcing bar binding machine 1A includes a control section 14A that controls the feed motor 33 that drives the motor 80 and the first feed gear 30L according to the state of the switch 13A.

The reinforcing bar binding machine 1A also includes a current detector 16A that detects the current flowing through the motor 80 . The control unit 14A and the current detection unit 16A detect the current flowing through the motor 80 with the current detection unit 16A, and the two wires W sandwiched between the second movable locking member 70R and the fixed locking member 70C are detected. A parallel state estimation means for inferring a parallel state is constructed.

Further, the reinforcing bar binding machine 1A is provided with a notification unit 17A that notifies according to the parallel state of the two wires W. As shown in FIG. The notification unit 17A includes a display unit such as a lamp and a display, a sound output unit such as a buzzer, and the like.

<Operation example of rebar binding machine>
12A to 12E are operation explanatory diagrams showing an example of the operation of binding reinforcing bars with wires. Next, referring to each figure, the operation of binding the reinforcing bars S with two wires W by the reinforcing bar binding machine 1A. will be explained.

In the reinforcing bar binding machine 1A, two wires W are sandwiched between the first feed gear 30L and the second feed gear 30R, and the tip WS of the wire W is connected to the first feed gear 30L and the second feed gear 30R. A standby state is a state in which the cutting portion 6A is positioned between the clamping position with the feed gear 30R and the fixed blade portion 60 of the cutting portion 6A. Further, in the standby state of the reinforcing bar binding machine 1A, as shown in FIG. 10A, the first movable locking member 70L is opened with respect to the fixed locking member 70C, and the second movable locking member 70R is fixedly locked. It is open 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 control section 14A drives the feed motor 33 in the forward rotation direction to rotate the first feed gear. 30L is rotated forward, and the second feed gear 30R is rotated forward following the first feed gear 30L. As a result, the two wires W sandwiched 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 4A1 is provided on the upstream side of the wire feeding section 3A, and a second wire guide _4A2 is provided on the downstream side _of the wire feeding section 3A with respect to the feeding direction of the wire W that is fed in the forward direction by the wire feeding section 3A. Thus, the two wires W are fed in parallel along the axial direction of the loop Ru formed by the wires W. As shown in FIG.

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 portion 5A. As a result, the wire W passes through the second wire guide _4A2 , the first guide pin 53a and the third guide pin 53c of the curl guide 50, and the three points on the upstream side of the third guide pin 53c. The second guide pin 53b is used to form a curl around the reinforcing bar S. As shown in FIG.

The wire W curled by the curl guide 50 is guided to the second guide portion 57 by the first guide portion 55 of the guide 51A. The wire W guided to the second guide portion 57 contacts the guide surface 57a of the second guide portion 57 at the tip WS, as shown in FIG. 12A. The wire W that has been curled by the curl guide 50 is further fed in the forward direction by the wire feeder 3A, and guided between the fixed locking member 70C and the second movable locking member 70R by the guidance guide 51A. be done. Then, the wire W is fed until the tip WS abuts against the feed restricting portion 9A. When the tip WS of the wire W is fed to the position where it abuts against the feed restricting portion 9A, the control portion 14A stops driving the feed motor 33. As shown in FIG.

Since there is a slight time difference from when the tip WS of the wire W comes in contact with the feed restricting portion 9A to when the wire feed portion 3A is stopped, the wire W is formed as shown in FIG. 12B. The loop Ru bends in a radially widening direction to the extent that it contacts the bottom surface portion 55D of the first guide portion 55 of the guide 51A.

After stopping the feeding of the wire W in the forward direction, the controller 14A drives the motor 80 in the forward rotation direction. The rotation of the rotating shaft 72 of the operating member 71 interlocked with the rotation of the motor 80 is restricted by the rotation restricting portion 74, and the rotation of the motor 80 is converted into linear movement. As a result, the actuating member 71 moves forward in the arrow A1 direction.

When the operating 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 rotates about the shaft 76 and moves toward the fixed locking member 70C. When the first movable locking member 70L is closed 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 moved to the first movable locking member. It is locked in such a manner that it can move between the stop member 70L and the fixed locking member 70C.

Further, the second movable locking member 70R rotates about the shaft 76 and moves in a direction approaching the fixed locking member 70C. When the second movable locking member 70R is closed 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 moved to the second movable locking member. It is locked in such a manner that it does not slip out from between the stop member 70R and the fixed locking member 70C. The control for arranging the two wires W sandwiched between the second movable locking member 70R and the fixed locking member 70C in a predetermined direction will be described later.

Furthermore, when the operating member 71 moves forward, the motion of the operating member 71 is transmitted to the retraction mechanism 53, and the first guide pin 53a retracts.

After advancing the operating member 71 to the position where the wire W is locked by the closing action of the first movable locking member 70L and the second movable locking member 70R, the control unit 14A temporarily stops the rotation of the motor 80. Then, the feed motor 33 is driven in the reverse rotation direction. As a result, the first feed gear 30L is reversed, and the second feed gear 30R is reversed following the first feed gear 30L.

Therefore, the two wires W sandwiched between the first feed gear 30L and the second feed gear 30R are fed in opposite directions indicated by arrows R. Since the tip WS side of the wire W is locked so as not to come off from between the second movable locking member 70R and the fixed locking member 70C, the wire W can be fed in the opposite direction as shown in FIG. 12C. , the two wires W are wound around the reinforcing bar S so as to be in close contact with each other.

The control unit 14A winds the wire W around the reinforcing bar S, stops driving the feed motor 33 in the reverse rotation direction, and then drives the motor 80 in the forward rotation direction, thereby moving the operating member 71 forward as indicated by the arrow A1. move to The forward movement of the actuating member 71 is transmitted to the cutting section 6A by the transmission mechanism 62, thereby rotating the movable blade section 61 and locking it between the first movable locking member 70L and the fixed locking member 70C. The wire W is cut by the operation of the fixed blade portion 60 and the movable blade portion 61 .

After cutting the wire W, by further moving the operating member 71 forward, the bent portions 71b1 and 71b2 move toward the reinforcing bar S as shown in FIG. 12D. As a result, the tip WS side of the wire W 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 bent using the locking position as a fulcrum. bend to the side. As the operating 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 of being sandwiched between the bent portions 71b1. be.

In addition, the 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 portion 6A, is pressed toward the reinforcing bar S by the bending portion 71b2 and locked. Bend to the reinforcing bar S side using the position as a fulcrum. As the operating 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 of being sandwiched between the bent portions 71b2. be.

After bending the tip WS side and the terminal WE side of the wire W toward the reinforcing bar S side, the motor 80 is further driven in the forward rotation direction, so that the operating member 71 moves further forward. By moving the operating member 71 to a predetermined position, the locking of the rotation restricting portion 74 is released.

As a result, the motor 80 is further driven in the forward rotation direction, so that the operating member 71 rotates in conjunction with the rotating shaft 72, and the locking member 70 holding the wire W is integrated with the operating member 71. It rotates and twists the wire W, as shown in FIG. 12E.

After twisting the wire W, the controller 14A drives the motor 80 in the reverse rotation direction. The rotation of the rotating shaft 72 of the operating member 71 interlocked with the rotation of the motor 80 is restricted by the rotation restricting portion 74, and the rotation of the motor 80 is converted into linear movement. As a result, the actuating member 71 moves in the arrow A2 direction, which is the rearward direction.

When the operating member 71 moves backward, the bent portions 71b1 and 71b2 are separated from the wire W, and the wire W is no longer held by the bent portions 71b1 and 71b2. Further, when the operating member 71 moves backward, 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 rotates about the shaft 76 and moves away from the fixed locking member 70C. Further, the second movable locking member 70R rotates about the shaft 76 and moves away from the fixed locking member 70C. As a result, the wire W is removed from the locking member 70 .

<Example of action and effect in which two wires are arranged in parallel in a predetermined direction>
Next, when two wires W are locked by the locking member 70, a form in which the two wires W are arranged side by side between the second movable locking member 70R and the fixed locking member 70C will be described. .

A conventional reinforcing bar binding machine has a diameter of about 50 to 70 mm assuming that the locus of a wire that is curled by a curl guide to form a loop is a circle. Therefore, in the conventional reinforcing bar binding machine, the wire W is guided to the locking member 70 of the binding portion 7A without contacting the guide surface 57a of the second guide portion 57. As shown in FIG.

On the other hand, in the reinforcing bar binding machine 1A, assuming that the trajectory of the wire W that is curled by the curl guide 50 to form the loop Ru is a circle, the length in the major axis direction is about 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 to form the loop Ru is a circle, if the length in the major axis direction is approximately 75 mm or more and 100 mm or less, the second guide portion is formed. As shown in FIGS. 12A and 12B, the wire W guided to 57 is guided to the locking member 70 of the binding portion 7A by coming into contact with the guide surface 57a.

When the two wires W come into contact with the guide surface 57a, the alignment direction of the two wires W is restricted by the guide surface 57a, and the gap between the fixed locking member 70C and the second movable locking member 70R is reduced. wire W is guided to.

When the two wires W are fed in contact with the guide surface 57a, the two wires W are arranged side by side along the axial direction of the loop Ru formed by the wires W. As shown in FIG. In the reinforcing bar binding machine 1A, the direction in which the first movable locking member 70L and the second movable locking member 70R open and close with respect to the fixed locking member 70C is along the axial direction of the loop Ru formed by the wire W. It is oriented.

As a result, the two wires W guided between the fixed locking member 70C and the second movable locking member 70R cause the second movable locking member 70R to open and close with respect to the fixed locking member 70C. It tends to be arranged in parallel along the direction.

13A, 13B, and 13C are explanatory diagrams showing a state in which the wire is locked by the locking member.

When two wires W are sandwiched between the second movable locking member 70R and the fixed locking member 70C, the second movable locking member 70R opens and closes with respect to the fixed locking member 70C. FIG. 13A shows a configuration in which two wires W are crossed and arranged side by side. FIG. 13B shows a form in which 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. Furthermore, by sandwiching the two wires W between the second movable locking member 70R and the fixed locking member 70C, the two wires W along the direction in which the second movable locking member 70R opens and closes. FIG. 13C shows a form in which the parallelism of is easily eliminated.

As shown in FIG. 13A, if two wires W are arranged side by side crossing the direction in which the second movable locking member 70R opens and closes with respect to the fixed locking member 70C, the fixed locking member 70C and Two wires W are locked with a gap of about one wire between them and the second movable locking member 70R. As a result, the distance between the second movable locking member 70R and the fixed locking member 70C becomes equal to the diameter of the wire W.

On the other hand, as shown in FIG. 13B, when 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 fixed locking member 70C can be fixed. Two wires W are locked with a gap of approximately two wires between the member 70C and the second movable locking member 70R. As a result, the distance between the second movable locking member 70R and the fixed locking member 70C is equivalent to twice the diameter of the wire W.

When two wires W are sandwiched between the second movable locking member 70R and the fixed locking member 70C, the two wires W can be locked in the form shown in FIG. 13A. The movable range of the two movable locking members 70R is determined.

Therefore, if the two wires W are arranged in the form shown in FIG. 13B, after the two wires W are sandwiched between the second movable locking member 70R and the fixed locking member 70C, the second wire W The second movable locking member 70R cannot move toward the fixed locking member 70C.

Therefore, the direction in which the second movable locking member 70R opens and closes is adjusted so that the two wires W sandwiched between the second movable locking member 70R and the fixed locking member 70C are arranged side by side in a predetermined direction. A control is executed to eliminate the parallelism of the two wires W along the .

FIG. 14 is a flow chart showing a first embodiment of control for arranging two wires in a predetermined direction, and FIGS. 15A to 15I show an example of an operation for arranging two wires in a predetermined direction. FIG. 4 is an operation explanatory diagram; An embodiment of the operation of presuming the parallel state of the two wires W and canceling the parallel state of the two wires W along the opening/closing direction of the second movable locking member 70R will be described below.

When the control unit 14A determines that the switch 13A is in a predetermined state, that is, the switch 13A is turned on in this example, at step SA1 in FIG. Feed the wire W forward.

In the control section 14A, the tips WS of the two wires W guided between the second movable locking member 70R and the fixed locking member 70C are abutted against the feed restricting section 9A as shown in FIG. 15A. When it reaches the position, the drive of the feed motor 33 is stopped in step SA3. Stop feeding the wire W in the forward direction.

After stopping the drive of the feed motor 33, the control unit 14A drives the motor 80 in the forward rotation direction in step SA4 to move the first movable locking member 70L to the fixed locking member 70C as shown in FIG. 15B. The second movable locking member 70R is moved toward the fixed locking member 70C, and the locking member 70 is closed.

If the two wires W can be arranged in the form shown in FIG. The stop member 70R moves toward a predetermined position with respect to the fixed locking member 70C. That is, the second movable locking member 70R approaches the fixed locking member 70C until a space corresponding to one wire is formed between the fixed locking member 70C and the second movable locking member 70R. move in the direction The first movable locking member 70L also moves in a direction approaching a predetermined position with respect to the fixed locking member 70C in conjunction with the second movable locking member 70R.

On the other hand, if the two wires W sandwiched between the second movable locking member 70R and the fixed locking member 70C are arranged in the form shown in FIG. 2 of the movable locking member 70R, a space corresponding to two wires is formed.

If the direction in which the two wires W are arranged in the configuration shown in FIG. 13B cannot be changed to the configuration shown in FIG. The second movable locking member 70R cannot move further in the direction closer to the fixed locking member 70C from the state in which the space of this length is formed, and the load applied to the locking member 70 increases.

Further, even if the forward rotation of the motor 80 continues, the rotation shaft 72 cannot be rotated. Therefore, the second movable locking member 70R is attached to the fixed locking member 70C up to a position where a space corresponding to one wire is formed between the fixed locking member 70C and the second movable locking member 70R. The current flowing through the motor 80 increases compared to the case where it can move in the approaching direction.

Therefore, the control unit 14A detects the load applied to the locking member 70 and the current flowing through the motor 80 with the current detection unit 16A, and estimates the parallel state of the two wires W. FIG. Then, the control unit 14A performs an operation to eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes according to the parallelism of the two wires.

That is, in step SA5, the control unit 14A detects the current flowing through the motor 80 with the current detection unit 16A. If the current flowing through the motor 80 does not exceed a predetermined value, the two wires W sandwiched between the second movable locking member 70R and the fixed locking member 70C will be pulled from the second wire W as shown in FIG. 13A. It can be inferred that the movable locking members 70R are in a normal configuration in which the movable locking members 70R are arranged crosswise in the opening/closing direction. Accordingly, if the current flowing through the motor 80 does not exceed the predetermined threshold value, the controller 14A performs the above-described normal binding operation in step SA6.

On the other hand, when the current flowing through the motor 80 exceeds a predetermined threshold, the two wires W sandwiched between the second movable locking member 70R and the fixed locking member 70C are pulled apart as shown in FIG. 13B. Thus, it can be inferred that the second movable locking member 70R is arranged side by side along the opening and closing direction. As a result, the control unit 14A stops driving the motor 80 in the forward rotation direction when the current flowing through the motor 80 exceeds the abnormality detection threshold at which the two wires W are not aligned in a normal configuration.

When the control unit 14A stops driving the motor 80 in the forward rotation direction, it opens and closes the first movable locking member 70L and the second movable locking member 70R, and the second movable locking member 70R opens and closes. An operation is performed to eliminate the parallelism of the two wires W along the direction.

First, when the operation of opening the first movable locking member 70L and the second movable locking member 70R removes the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes. will be explained.

At step SA7, the control unit 14A drives the motor 80 in the reverse rotation direction to move the first movable locking member 70L away from the fixed locking member 70C as shown in FIG. 15C. The locking member 70 is opened by moving the movable locking member 70R away from the fixed locking member 70C.

When the control unit 14A drives the motor 80 in the reverse rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are opened, the control unit 14A stops driving the motor 80 in the reverse rotation direction.

As described above, since there is a slight time difference from when the tip WS of the wire W comes in contact with the feed restricting portion 9A to when the wire feeding portion 3A stops driving, the tip WS contacts the feed restricting portion 9A. In this state, the wire W is sent in the positive direction by a small amount, so that the loop Ru formed by the wire W bends in a radially widening direction.

In the operation of sandwiching the two wires W whose feeding is stopped between the second movable locking member 70R and the fixed locking member 70C, as shown in FIG. 15B, the second movable locking member 70R By bending the two wires W around the pressed position as a fulcrum, the leading ends WS of the wires W are separated from the feed restricting portion 9A.

As a result, when the second movable locking member 70R is opened from the state shown in FIG. 15B, the tip WS side of the wire W feeds due to the elasticity of the wire W bent in the radially expanding direction, as shown in FIG. 15D. It tries to move in the direction of the restriction portion 9A. When the two wires W are arranged side by side along the opening and closing direction of the second movable locking member 70R, one wire W is in contact with the convex portion 70C1 of the fixed locking member 70C. Difficult to move. On the other hand, the other wire W is not in contact with the convex portion 70C1 of the fixed locking member 70C and can be easily moved. Therefore, when the wire W moves by opening the second movable locking member 70R, a force acts to change the direction in which the two wires W are arranged in parallel, and as shown in FIG. 13C, the second movable locking member It is possible to easily eliminate the parallelism of the two wires W along the direction in which the 70R opens and closes.

Therefore, the opening operation of the second movable locking member 70R eliminates the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes, and the two wires W are separated from each other as shown in FIG. 15E. , the second movable locking member 70R can be arranged side by side crossing the opening and closing direction.

Next, by closing the first movable locking member 70L and the second movable locking member 70R again, the parallelism of the two wires W along the opening/closing direction of the second movable locking member 70R is eliminated. A case of doing so will be explained.

After stopping the driving of the motor 80 in the reverse rotation direction, the control unit 14A drives the motor 80 in the forward rotation direction in step SA8, and as shown in FIG. 15F, locks the first movable locking member 70L. The second movable locking member 70R is moved toward the fixed locking member 70C, and the locking member 70 is closed.

By sandwiching the two wires W between the second movable locking member 70R and the fixed locking member 70C, the two wires W move toward the fixed locking member 70C with the second movable locking member 70R. When pushed, a force acts to change the direction in which the two wires W are arranged in parallel with the projections 70C1 and 70C2 of the fixed locking member 70C as fulcrums, and the second movable locking member 70R opens and closes as shown in FIG. 13C. The configuration can be such that the parallelism of the two wires W along the direction can be easily eliminated.

Therefore, by the closing operation of the second movable locking member 70R, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated, and the two wires W are aligned as shown in FIG. 15G. , the second movable locking member 70R can be arranged side by side crossing the opening and closing direction.

Also, as shown in FIG. 15F, when the second movable locking member 70R is moved in a direction approaching the fixed locking member 70C, the arrangement of the wires W in a predetermined direction is not eliminated, that is, as shown in FIG. 13C. may not be. Even in that case, when the second movable locking member 70R moves closer to the fixed locking member 70C as shown in FIG. It is further pushed in the direction of the stop member 70C, and a force acts to change the direction in which the two wires W are aligned with the projections 70C1 and 70C2 of the fixed locking member 70C as fulcrums, and as shown in FIG. It is possible to easily eliminate the parallelism of the two wires W along the direction in which the stop member 70R opens and closes.

Therefore, when the second movable locking member 70R is further closed, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated, and the two wires W are separated from each other. As shown in 15I, the second movable locking member 70R can be arranged in parallel crossing the direction of opening and closing.

At step SA9, the control unit 14A detects the current flowing through the motor 80 with the current detection unit 16A. If the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated by opening and closing the first movable locking member 70L and the second movable locking member 70R, When the motor 80 is driven in the forward rotation direction, the current flowing through the motor 80 does not exceed a predetermined value. Therefore, if the current flowing through the motor 80 does not exceed the abnormality detection threshold, the controller 14A continues the above-described normal binding operation in step SA6.

On the other hand, when the current flowing through the motor 80 exceeds the abnormality detection threshold, the control unit 14A determines that the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is not resolved. Then, it is determined that an error has occurred, and the drive of the motor 80 in the forward rotation direction is stopped. Note that the abnormality detection threshold may be variable. For example, the first movable locking member 70L and the second movable locking member 70R are closed from the abnormality detection threshold in the first operation of closing the first movable locking member 70L and the second movable locking member 70R. The abnormality detection threshold for the second operation is set to a small value. The controller 14A switches the abnormality detection threshold according to the number of times the first movable locking member 70L and the second movable locking member 70R are closed during one binding operation.

After stopping the driving of the motor 80 in the forward rotation direction, the control unit 14A drives the motor 80 in the reverse rotation direction in step SA10 to move the first movable locking member 70L away from the fixed locking member 70C. By moving the second movable locking member 70R away from the fixed locking member 70C, the locking member 70 is opened.

When the control unit 14A drives the motor 80 in the reverse rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are opened, the control unit 14A stops driving the motor 80 in the reverse rotation direction. Then, in step SA11, the notification unit 17A is driven to notify that an error has occurred.

FIG. 16 is a flow chart showing a second embodiment of control for arranging two wires W in a predetermined direction. Another embodiment of the operation of releasing the parallelism of the two wires W along the direction in which the member 70R opens and closes will be described.

When the control unit 14A determines that the switch 13A is in a predetermined state, that is, the switch 13A is turned on in this example, at step SB1 in FIG. Feed the wire W forward.

When the tips WS of the two wires W guided between the second movable locking member 70R and the fixed locking member 70C are fed to a position where they abut against the feed restricting portion 9A, the control section 14A performs step At SB3, the driving of the feed motor 33 is stopped. Stop feeding the wire W in the forward direction.

After stopping the driving of the feed motor 33, the control unit 14A drives the motor 80 in the forward rotation direction to move the first movable locking member 70L toward the fixed locking member 70C in step SB4. The second movable locking member 70R is moved toward the fixed locking member 70C, and the locking member 70 is closed.

At step SB5, the controller 14A detects the current flowing through the motor 80 with the current detector 16A. If the current flowing through the motor 80 does not exceed the abnormality detection threshold, the controller 14A performs the above-described normal binding operation at step SB6.

On the other hand, the control unit 14A stops driving the motor 80 in the forward rotation direction when the current flowing through the motor 80 exceeds the abnormality detection threshold.

When the control unit 14A stops driving the motor 80 in the forward rotation direction, the control unit 14A opens and closes the first movable locking member 70L and the second movable locking member 70R, and feeds the wire W slightly in the forward direction. The second movable locking member 70R performs an operation to eliminate the parallelism of the two wires W along the opening/closing direction.

At step SB7, the control unit 14A drives the motor 80 in the reverse rotation direction to move the first movable locking member 70L away from the fixed locking member 70C and fix the second movable locking member 70R. The locking member 70 is opened by moving away from the locking member 70C.

When the control unit 14A drives the motor 80 in the reverse rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are opened, the control unit 14A stops driving the motor 80 in the reverse rotation direction.

When the locking member 70 is opened, the controller 14A drives the feed motor 33 in the forward rotation direction in step SB8 to feed the two wires W in the forward direction. After feeding the wire W forward by a predetermined amount, the controller 14A stops driving the feed motor 33 in step SB9. Stop feeding the wire W in the forward direction.

When the two wires W are arranged side by side along the direction in which the second movable locking member 70R opens and closes, as described above, one wire that is in contact with the convex portion 70C1 of the fixed locking member 70C W is difficult to move. On the other hand, the other wire W, which is not in contact with the convex portion 70C1 of the fixed locking member 70C, is easily moved. As a result, the second movable locking member 70R is opened and the wire W is sent in the positive direction by a small amount, thereby exerting a force to change the direction in which the two wires W are arranged side by side. Further, by feeding the wire W in the positive direction by a small amount, the leading end WS of the wire W is more likely to come into contact with the feed restricting portion 9A. When the tip WS of the wire W comes into contact with the feed restricting portion 9A, a force acts to change the direction in which the two wires W are arranged side by side. Therefore, as shown in FIG. 13C, it is possible to easily eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes.

Therefore, by the operation of opening the second movable locking member 70R and the operation of feeding the wire W, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated. wire W can be arranged in parallel crossing the direction in which the second movable locking member 70R opens and closes.

When the controller 14A stops driving the motor 80 in the reverse rotation direction and stops feeding the wire W, in step SB10, the motor 80 is driven in the forward rotation direction to fix the first movable locking member 70L. The second movable locking member 70R is moved toward the fixed locking member 70C, and the locking member 70 is closed.

By the action of sandwiching the two wires W between the second movable locking member 70R and the fixed locking member 70C, a force acts to change the direction in which the two wires W are arranged in parallel, and as shown in FIG. 13C, It is possible to easily eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes. Further, by feeding the wire W by a small amount, the position where the wire W contacts the second movable locking member 70R and the fixed locking member 70C changes, and the force to change the direction in which the two wires W are arranged side by side is generated. As a result, as shown in FIG. 13C, it is possible to easily eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes.

Therefore, when the second movable locking member 70R is closed, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated, and the two wires W are connected to the second movable locking member 70R. , the movable locking members 70R can be arranged side by side crossing the direction of opening and closing.

Also, there is a case where even if the second movable locking member 70R is moved in a direction approaching the fixed locking member 70C, the parallelism of the wires W in the predetermined direction cannot be eliminated, that is, there is a case where the state shown in FIG. 13C is not obtained. Even in that case, when the second movable locking member 70R moves closer to the fixed locking member 70C, the two wires W are further pushed toward the fixed locking member 70C by the second movable locking member 70R. 13C, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes can be easily eliminated. can take the form

Therefore, when the second movable locking member 70R is further closed, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated, and the two wires W are connected to the second movable locking member 70R. The two movable locking members 70R can be arranged side by side crossing the direction of opening and closing.

At step SB11, the controller 14A detects the current flowing through the motor 80 with the current detector 16A. By the operation of opening and closing the first movable locking member 70L and the second movable locking member 70R and the operation of slightly feeding the wire W, two wires along the direction in which the second movable locking member 70R opens and closes. If the parallelism of the wires W is eliminated, the current flowing through the motor 80 will not exceed the abnormality detection threshold when the motor 80 is driven in the forward rotation direction. Therefore, if the current flowing through the motor 80 does not exceed the abnormality detection threshold, the controller 14A continues the above-described normal binding operation in step SB6.

On the other hand, when the current flowing through the motor 80 exceeds the abnormality detection threshold, the control unit 14A determines that the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is not resolved. Then, it is determined that an error has occurred, and the drive of the motor 80 in the forward rotation direction is stopped. In addition, as described above, the control unit 14A may be set so that the abnormality detection threshold can be switched.

After stopping the driving of the motor 80 in the forward rotation direction, the control unit 14A drives the motor 80 in the reverse rotation direction in step SB12 to move the first movable locking member 70L away from the fixed locking member 70C. By moving the second movable locking member 70R away from the fixed locking member 70C, the locking member 70 is opened.

When the control unit 14A drives the motor 80 in the reverse rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are opened, the control unit 14A stops driving the motor 80 in the reverse rotation direction. Then, at step SB13, the notification unit 17A is driven to notify that an error has occurred.

FIG. 17 is a flow chart showing a third embodiment of control for arranging two wires W in a predetermined direction. Still another embodiment of the operation of releasing the parallelism of the two wires W along the direction in which the member 70R opens and closes will be described.

When the controller 14A determines in step SC1 of FIG. 17 that the first movable locking member 70L, the second movable locking member 70R, and the like are in the standby state described above, the feed motor 33 is stopped in step SC2. is driven in the forward rotation direction to feed two wires W in the forward direction.

When the tips WS of the two wires W guided between the second movable locking member 70R and the fixed locking member 70C are fed to a position where they abut against the feed restricting portion 9A, the control section 14A performs step At SC3, the driving of the feed motor 33 is stopped. Stop feeding the wire W in the forward direction.

After stopping the drive of the feed motor 33, the controller 14A drives the motor 80 in the forward rotation direction to move the first movable locking member 70L toward the fixed locking member 70C in step SC4. The second movable locking member 70R is moved toward the fixed locking member 70C, and the locking member 70 is closed.

At step SC5, the controller 14A detects the current flowing through the motor 80 with the current detector 16A. If the current flowing through the motor 80 does not exceed the abnormality detection threshold, the controller 14A performs the above-described normal binding operation in step SC6.

On the other hand, the control unit 14A stops driving the motor 80 in the forward rotation direction when the current flowing through the motor 80 exceeds the abnormality detection threshold.

When the control unit 14A stops driving the motor 80 in the forward rotation direction, the control unit 14A opens and closes the first movable locking member 70L and the second movable locking member 70R, and feeds the wire W slightly in the opposite direction. The second movable locking member 70R performs an operation to eliminate the parallelism of the two wires W along the opening/closing direction.

At step SC7, the control unit 14A drives the motor 80 in the reverse rotation direction to move the first movable locking member 70L away from the fixed locking member 70C and fix the second movable locking member 70R. The locking member 70 is opened by moving away from the locking member 70C.

When the control unit 14A drives the motor 80 in the reverse rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are opened, the control unit 14A stops driving the motor 80 in the reverse rotation direction.

When the locking member 70 is opened, the controller 14A drives the feed motor 33 in the reverse rotation direction in step SC8 to feed the two wires W in the reverse direction. When the wire W is fed in the reverse direction by a predetermined amount, the controller 14A stops driving the feed motor 33 in step SC9. Stop feeding the wire W in the reverse direction.

When the two wires W are arranged side by side along the direction in which the second movable locking member 70R opens and closes, as described above, one wire that is in contact with the convex portion 70C1 of the fixed locking member 70C W is difficult to move. On the other hand, the other wire W, which is not in contact with the convex portion 70C1 of the fixed locking member 70C, is easily moved. Therefore, even when the second movable locking member 70R is opened and the wire W is sent in the opposite direction by a small amount, a force acts to change the direction in which the two wires W are arranged side by side. Therefore, as shown in FIG. 13C, it is possible to easily eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes.

Therefore, by the operation of opening the second movable locking member 70R and the operation of feeding the wire W, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated. wire W can be arranged in parallel crossing the direction in which the second movable locking member 70R opens and closes.

When the control unit 14A stops driving the motor 80 in the reverse rotation direction and stops feeding the wire W, in step SC10, the control unit 14A drives the motor 80 in the forward rotation direction to fix the first movable locking member 70L. The second movable locking member 70R is moved toward the fixed locking member 70C, and the locking member 70 is closed.

By the action of sandwiching the two wires W between the second movable locking member 70R and the fixed locking member 70C, a force acts to change the direction in which the two wires W are arranged in parallel, and as shown in FIG. 13C, It is possible to easily eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes. Further, by feeding the wire W by a small amount, the position where the wire W contacts the second movable locking member 70R and the fixed locking member 70C changes, and the force to change the direction in which the two wires W are arranged side by side is generated. As a result, as shown in FIG. 13C, it is possible to easily eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes.

Therefore, when the second movable locking member 70R is closed, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated, and the two wires W are connected to the second movable locking member 70R. , the movable locking members 70R can be arranged side by side crossing the direction of opening and closing.

Also, there is a case where even if the second movable locking member 70R is moved in a direction approaching the fixed locking member 70C, the parallelism of the wires W in the predetermined direction cannot be eliminated, that is, there is a case where the state shown in FIG. 13C is not obtained. Even in that case, when the second movable locking member 70R moves closer to the fixed locking member 70C, the two wires W are further pushed toward the fixed locking member 70C by the second movable locking member 70R. 13C, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes can be easily eliminated. can take the form

Therefore, when the second movable locking member 70R is further closed, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated, and the two wires W are connected to the second movable locking member 70R. The two movable locking members 70R can be arranged side by side crossing the direction of opening and closing.

In step SC11, the controller 14A detects the current flowing through the motor 80 with the current detector 16A. By the operation of opening and closing the first movable locking member 70L and the second movable locking member 70R and the operation of slightly feeding the wire W, two wires along the direction in which the second movable locking member 70R opens and closes. If the parallelism of the wires W is eliminated, the current flowing through the motor 80 will not exceed the abnormality detection threshold when the motor 80 is driven in the forward rotation direction. Therefore, if the current flowing through the motor 80 does not exceed the abnormality detection threshold, the controller 14A continues the above-described normal binding operation in step SC6.

On the other hand, when the current flowing through the motor 80 exceeds the abnormality detection threshold, the control unit 14A determines that the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is not resolved. Then, it is determined that an error has occurred, and the drive of the motor 80 in the forward rotation direction is stopped. In addition, as described above, the control unit 14A may be set so that the abnormality detection threshold can be switched.

After stopping the driving of the motor 80 in the forward rotation direction, the control unit 14A drives the motor 80 in the reverse rotation direction in step SC12 to move the first movable locking member 70L away from the fixed locking member 70C. By moving the second movable locking member 70R away from the fixed locking member 70C, the locking member 70 is opened.

When the control unit 14A drives the motor 80 in the reverse rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are opened, the control unit 14A stops driving the motor 80 in the reverse rotation direction. Then, in step SC13, the notification unit 17A is driven to notify that an error has occurred.

FIG. 18 is a partially cut-away perspective view showing another example of the main configuration of the reinforcing bar binding machine, and FIG. 19 is a sectional view showing another example of the main configuration of the reinforcing bar binding machine. A reinforcing bar binding machine 1B of a modified example includes a parallel regulation section 90 that guides the direction in which the wires W are arranged in parallel in the feed regulation section 9B. Other configurations are the same as those of the reinforcing bar binding machine 1A described above.

The feed regulating portion 9B for regulating the feeding of the wire W, like the feed regulating portion 9A, is provided in the feed path of the wire W passing between the fixed locking member 70C and the second movable locking member 70R. It is configured by providing a member against which the WS is abutted. The feed restricting portion 9B is formed integrally with the guide plate 50R that constitutes the curl guide 50, and protrudes from the guide plate 50R in a direction that intersects the feed path of the wire W. As shown in FIG.

The parallel regulating portion 90 is provided on the surface of the _feed regulating portion _9B with which the wire W is in contact. It is configured by providing a concave portion extending in the direction of

20A to 20I are operation explanatory diagrams showing an example of the operation of arranging two wires W in parallel in a predetermined direction in a configuration provided with a parallel restricting portion. The parallel state of two wires W is assumed below. Then, still another embodiment of the operation of releasing the parallelism of the two wires W along the opening/closing direction of the second movable locking member 70R will be described. Although the example shown in FIG. 14 is referred to for the control flowchart, the example shown in FIG. 16 or 17 may also be used.

When the control unit 14A determines that the switch 13A is in a predetermined state, that is, the switch 13A is turned on in this example, at step SA1 in FIG. Feed the wire W forward.

In the control section 14A, the tips WS of the two wires W guided between the second movable locking member 70R and the fixed locking member 70C are abutted against the feed restricting section 9B as shown in FIG. 20A. When it reaches the position, the drive of the feed motor 33 is stopped in step SA3. Stop feeding the wire W in the forward direction.

21A and 21B are explanatory diagrams showing the movement of the wire in the feed restricting portion. Next, the effect of guiding the wire W by the feed restricting portion 9B will be described.

The feed regulating portion 9B extends in a direction intersecting the parallel direction of the two wires W regulated by the first wire guide _4A1 and the second wire guide _4A2 on the surface with which the wire W contacts. A parallel regulation section 90 is provided.

Since the parallel regulating portion 90 is concave with respect to the feed direction of the wire W fed in the positive direction, when the tip WS of the wire W is pressed against the feed regulating portion 9B, the apex of the concave forming the parallel regulating portion 90 is pushed. The tip WS of the wire W is guided toward.

As a result, as shown in FIG. 21A, the ends WS of the two wires W passing between the fixed locking member 70C and the second movable locking member 70R reach a position where they are in contact with and pressed against the feed restricting portion 9B. 21B, 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 restricting portion 90 extends.

Therefore, as shown in FIG. 13A, the two wires W can be guided in parallel with respect to the fixed locking member 70C in a direction crossing the direction in which the second movable locking member 70R opens and closes.

After stopping the driving of the feed motor 33, the control unit 14A drives the motor 80 in the forward rotation direction in step SA4, and as shown in FIG. The second movable locking member 70R is moved toward the fixed locking member 70C, and the locking member 70 is closed.

The control unit 14A detects the current flowing through the motor 80 with the current detection unit 16A and estimates the parallel state of the two wires W. FIG. Then, the control unit 14A performs an operation to eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes according to the parallelism of the two wires.

That is, the control unit 14A detects the current flowing through the motor 80 with the current detection unit 16A at step SA5. If the current flowing through the motor 80 does not exceed the abnormality detection threshold, the two wires W sandwiched between the second movable locking member 70R and the fixed locking member 70C will be in the second position as shown in FIG. 13A. It can be inferred that the two movable locking members 70R are in a normal form in which they are crossed and arranged side by side in the direction of opening and closing. Accordingly, if the current flowing through the motor 80 does not exceed the abnormality detection threshold, the controller 14A performs the above-described normal binding operation in step SA6.

On the other hand, when the current flowing through the motor 80 exceeds the abnormality detection threshold, the two wires W sandwiched between the second movable locking member 70R and the fixed locking member 70C are separated as shown in FIG. 13B. Thus, it can be inferred that the second movable locking member 70R is arranged side by side along the opening and closing direction. As a result, the control unit 14A stops driving the motor 80 in the forward rotation direction when the current flowing through the motor 80 exceeds the abnormality detection threshold.

When the control unit 14A stops driving the motor 80 in the forward rotation direction, it opens and closes the first movable locking member 70L and the second movable locking member 70R, and the second movable locking member 70R opens and closes. An operation is performed to eliminate the parallelism of the two wires W along the direction.

At step SA7, the control unit 14A drives the motor 80 in the reverse rotation direction to move the first movable locking member 70L away from the fixed locking member 70C as shown in FIG. 20C. The locking member 70 is opened by moving the movable locking member 70R away from the fixed locking member 70C.

When the control unit 14A drives the motor 80 in the reverse rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are opened, the control unit 14A stops driving the motor 80 in the reverse rotation direction.

As described above, since there is a slight time difference from when the tip WS of the wire W comes in contact with the feed restricting portion 9B to when the wire feeding portion 3A stops driving, the tip WS contacts the feed restricting portion 9B. In this state, the wire W is sent in the positive direction by a small amount, so that the loop Ru formed by the wire W bends in a radially widening direction.

In the operation of sandwiching the two wires W whose feed is stopped between the second movable locking member 70R and the fixed locking member 70C, as shown in FIG. 20B, the second movable locking member 70R By bending the two wires W about the pressed position as a fulcrum, the tip WS of the wire W is separated from the feed restricting portion 9B.

As a result, when the second movable locking member 70R opens from the state shown in FIG. 20B, as shown in FIG. It tries to move in the direction of the restriction portion 9B. When the two wires W are arranged side by side along the direction in which the second movable locking member 70R opens and closes, as described above, one wire that is in contact with the convex portion 70C1 of the fixed locking member 70C W is difficult to move. On the other hand, the other wire W, which is not in contact with the convex portion 70C1 of the fixed locking member 70C, is easily moved. Therefore, when the wire W moves by opening the second movable locking member 70R, a force acts to change the direction in which the two wires W are arranged in parallel, and as shown in FIG. 13C, the second movable locking member It is possible to easily eliminate the parallelism of the two wires W along the direction in which the 70R opens and closes. Further, when the wire moves due to the opening of the second movable locking member 70R, the tip WS of the wire W may come into contact with the feed restricting portion 9B. When the tip WS of the wire W comes into contact with the feed restricting portion 9B, a force acts to change the direction in which the two wires W are arranged in parallel, and as shown in FIG. In addition, the parallelism of the two wires W can be easily eliminated.

Therefore, the opening operation of the second movable locking member 70R eliminates the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes, and the two wires W are separated from each other in the direction shown in FIG. 20E. , the second movable locking member 70R can be arranged side by side crossing the opening and closing direction.

After stopping the driving of the motor 80 in the reverse rotation direction, the control unit 14A drives the motor 80 in the forward rotation direction in step SA8, and as shown in FIG. The second movable locking member 70R is moved toward the fixed locking member 70C, and the locking member 70 is closed.

By the action of sandwiching the two wires W between the second movable locking member 70R and the fixed locking member 70C, a force acts to change the direction in which the two wires W are arranged in parallel, and as shown in FIG. 13C, It is possible to easily eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes.

Therefore, the closing action of the second movable locking member 70R eliminates the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes, and the two wires W are connected to each other as shown in FIG. 20G. , the second movable locking member 70R can be arranged side by side crossing the opening and closing direction.

Also, as shown in FIG. 20F, when the second movable locking member 70R is moved in a direction approaching the fixed locking member 70C, the parallelism of the wires W in a predetermined direction is not eliminated, that is, as shown in FIG. 13C. may not be. Even in that case, when the second movable locking member 70R moves closer to the fixed locking member 70C as shown in FIG. 20H, the two wires W are fixedly locked by the second movable locking member 70R. It is further pushed in the direction of the stop member 70C, and a force acts to change the direction in which the two wires W are aligned with the projections 70C1 and 70C2 of the fixed locking member 70C as fulcrums, and as shown in FIG. It is possible to easily eliminate the parallelism of the two wires W along the direction in which the stop member 70R opens and closes.

Therefore, when the second movable locking member 70R is further closed, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated, and the two wires W are separated from each other. As shown in 20I, the second movable locking member 70R can be arranged in parallel crossing the direction of opening and closing.

At step SA9, the control unit 14A detects the current flowing through the motor 80 with the current detection unit 16A. If the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated by opening and closing the first movable locking member 70L and the second movable locking member 70R, When the motor 80 is driven in the forward rotation direction, the current flowing through the motor 80 does not exceed a predetermined value. Therefore, if the current flowing through the motor 80 does not exceed the abnormality detection threshold, the controller 14A continues the above-described normal binding operation in step SA6.

On the other hand, when the current flowing through the motor 80 exceeds the abnormality detection threshold, the control unit 14A determines that the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is not resolved. Then, it is determined that an error has occurred, and the drive of the motor 80 in the forward rotation direction is stopped. In addition, as described above, the control unit 14A may be set so that the abnormality detection threshold can be switched.

After stopping the driving of the motor 80 in the forward rotation direction, the control unit 14A drives the motor 80 in the reverse rotation direction in step SA10 to move the first movable locking member 70L away from the fixed locking member 70C. By moving the second movable locking member 70R away from the fixed locking member 70C, the locking member 70 is opened.

When the control unit 14A drives the motor 80 in the reverse rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are opened, the control unit 14A stops driving the motor 80 in the reverse rotation direction. Then, in step SA11, the notification unit 17A is driven to notify that an error has occurred.

As described above, the parallel state of the two wires W is estimated, and the first movable locking member 70L and the second movable locking member 70R are opened and closed according to the parallel state of the two wires, In each embodiment in which the parallelism of two wires W along the opening and closing direction of the second movable locking member 70R is eliminated, as shown in FIG. 13A, the fixed locking member 70C and the second movable locking member Two wires W are locked in a state in which a space for locking one wire is formed between the member 70R and the load applied to the locking member 70 is reduced. The wire W can be reliably locked. Also, the binding operation can be continued. In each embodiment, during one binding operation, the first movable locking member 70L and the second movable locking member 70R are opened and closed twice according to the parallel state of the two wires. However, the number of times the first movable locking member 70L and the second movable locking member 70R are opened and closed may be variable.

FIG. 22 is a flowchart showing a fourth embodiment of control for arranging two wires W in parallel in a predetermined direction. An embodiment of the operation of releasing the parallelism of the two wires W along the direction in which the member 70R opens and closes will be described.

When the control unit 14A determines that the switch 13A is in a predetermined state, that is, the switch 13A is turned on in this example, in step SD1 of FIG. Feed the wire W forward.

When the tips WS of the two wires W guided between the second movable locking member 70R and the fixed locking member 70C are fed to a position where they abut against the feed restricting portion 9A, the control section 14A performs step At SD3, the driving of the feed motor 33 is stopped. Stop feeding the wire W in the forward direction.

After stopping the drive of the feed motor 33, the controller 14A drives the motor 80 in the forward rotation direction to move the first movable locking member 70L toward the fixed locking member 70C in step SD4. The second movable locking member 70R is moved toward the fixed locking member 70C, and the locking member 70 is closed.

When the control unit 14A drives the motor 80 in the forward rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are closed, the control unit 14A stops driving the motor 80 in the forward rotation direction.

After stopping driving the motor 80 in the forward rotation direction, the control unit 14A drives the motor 80 in the reverse rotation direction in step SD5 to move the first movable locking member 70L away from the fixed locking member 70C. By moving the second movable locking member 70R away from the fixed locking member 70C, the locking member 70 is opened.

When the control unit 14A drives the motor 80 in the reverse rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are opened, the control unit 14A stops driving the motor 80 in the reverse rotation direction.

When the second movable locking member 70R is opened, as described above, due to the elasticity of the wire W bent in the radially expanding direction, the tip WS side of the wire W attempts to move toward the feed restricting portion 9A. When the two wires W are arranged side by side along the direction in which the second movable locking member 70R opens and closes, as described above, one wire that is in contact with the convex portion 70C1 of the fixed locking member 70C W is difficult to move. On the other hand, the other wire W, which is not in contact with the convex portion 70C1 of the fixed locking member 70C, is easily moved. Therefore, when the wire W moves by opening the second movable locking member 70R, a force acts to change the direction in which the two wires W are arranged in parallel, and as shown in FIG. 13C, the second movable locking member It is possible to easily eliminate the parallelism of the two wires W along the direction in which the 70R opens and closes.

Therefore, the opening action of the second movable locking member 70R eliminates the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes, and the two wires W are connected to the second movable locking member 70R. , the movable locking members 70R can be arranged side by side crossing the direction of opening and closing.

After stopping the driving of the motor 80 in the reverse rotation direction, the control unit 14A drives the motor 80 in the forward rotation direction in step SD6 to move the first movable locking member 70L toward the fixed locking member 70C. By moving the second movable locking member 70R in a direction approaching the fixed locking member 70C, the locking member 70 is closed.

By the action of sandwiching the two wires W between the second movable locking member 70R and the fixed locking member 70C, a force acts to change the direction in which the two wires W are arranged in parallel, and as shown in FIG. 13C, It is possible to easily eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes.

Therefore, when the second movable locking member 70R is closed, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated, and the two wires W are connected to the second movable locking member 70R. , the movable locking members 70R can be arranged side by side crossing the direction of opening and closing.

Also, there is a case where even if the second movable locking member 70R is moved in a direction approaching the fixed locking member 70C, the parallelism of the wires W in the predetermined direction cannot be eliminated, that is, there is a case where the state shown in FIG. 13C is not obtained. Even in that case, when the second movable locking member 70R moves closer to the fixed locking member 70C, the two wires W are further pushed toward the fixed locking member 70C by the second movable locking member 70R. 13C, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes can be easily eliminated. can take the form

Therefore, when the second movable locking member 70R is further closed, the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated, and the two wires W are connected to the second movable locking member 70R. The two movable locking members 70R can be arranged side by side crossing the direction of opening and closing.

In step SD7, the control unit 14A detects the current flowing through the motor 80 with the current detection unit 16A. If the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated by opening and closing the first movable locking member 70L and the second movable locking member 70R, When the motor 80 is driven in the forward rotation direction, the current flowing through the motor 80 does not exceed a predetermined value. Therefore, if the current flowing through the motor 80 does not exceed the abnormality detection threshold, the controller 14A continues the above-described normal binding operation in step SD8.

On the other hand, when the current flowing through the motor 80 exceeds the abnormality detection threshold, the control unit 14A determines that the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is not resolved. Then, it is determined that an error has occurred, and the drive of the motor 80 in the forward rotation direction is stopped. In addition, as described above, the control unit 14A may be set so that the abnormality detection threshold can be switched.

After stopping driving the motor 80 in the forward rotation direction, the control unit 14A drives the motor 80 in the reverse rotation direction in step SD9 to move the first movable locking member 70L away from the fixed locking member 70C. By moving the second movable locking member 70R away from the fixed locking member 70C, the locking member 70 is opened.

When the control unit 14A drives the motor 80 in the reverse rotation direction by a predetermined amount by which the first movable locking member 70L and the second movable locking member 70R are opened, the control unit 14A stops driving the motor 80 in the reverse rotation direction. Then, in step SD10, the notification unit 17A is driven to notify that an error has occurred.

As described above, even in the embodiment in which the parallel state of the two wires W is not assumed, the operation of opening and closing the locking member 70 causes the fixed locking member 70C and the second movable engagement to move as shown in FIG. 13A. Two wires W are locked in a state in which a space for locking one wire is formed between the locking member 70R and the load applied to the locking member 70 is reduced. wire W can be reliably locked.

FIG. 23A is a side view showing an example of the main configuration of a reinforcing bar binding machine equipped with a parallel detection sensor; FIG. 23B is a side view showing another example of the main configuration of the reinforcing bar binding machine equipped with a parallel detection sensor; FIG. 24A. FIG. 24B is a cross-sectional view showing an example of the main configuration of a reinforcing bar binding machine equipped with a parallel detection sensor; FIG. 25 is a cross-sectional view showing another example of the main configuration of a reinforcing bar binding machine provided with a parallel detection sensor, and FIG. 25 is a functional block diagram showing an example of control functions of the reinforcing bar binding machine provided with a parallel detection sensor.

The reinforcing bar binding machine 1C includes a parallel detection sensor 100 that detects the parallel state of two wires W. As shown in FIG.

The parallel detection sensor 100 is an example of a parallel state detecting means, which is a parallel state estimating means, and is provided at or near the position where the leading end WS of the wire W contacts in the feed restricting portion 9A. The parallel detection sensor 100 is composed of an optical sensor, a magnetic force sensor, a contact sensor, or the like. If it is an optical sensor or a magnetic force sensor, as shown in FIGS. It is provided at a position where the wire W in contact with the feed restricting portion 9A can be detected in the vicinity of the position where the WS contacts. In the case of a contact sensor, as shown in FIGS. 23B and 24B, it is provided at a position where the leading end WS of the wire W comes into contact with the feed restricting portion 9A.

If the parallel detection sensor 100 is an optical sensor, for example, it is an image sensor. or two.

If the imaged wire W is one, as shown in FIG. 13A, the controller 14B controls two wires crossing the direction in which the second movable locking member 70R opens and closes with respect to the fixed locking member 70C. It is determined that the wires W are arranged side by side. On the other hand, if two wires W are imaged, the control unit 14B moves the second movable locking member 70R along the direction in which the second movable locking member 70R opens and closes with respect to the fixed locking member 70C, as shown in FIG. 13B. It is determined that the two wires W are arranged side by side.

If the parallel detection sensor 100 is an optical sensor, for example, it may be a transmission sensor composed of a pair of light emitting/receiving elements. It is detected whether the width for shielding the light is one wire W or two wires W.

Further, if the parallel detection sensor 100 is a magnetic force sensor, it is a Hall IC that can detect a magnetic field from a direction intersecting the direction in which the second movable locking member 70R opens and closes. It is detected whether two wires W are arranged in parallel crossing the opening/closing direction or two wires W are arranged in parallel along the opening/closing direction of the second movable locking member 70R.

If the parallel detection sensor 100 is a contact sensor, it may be a pressure sensor. It is detected whether or not two wires W are in contact with each other in parallel along the opening/closing direction of the movable locking member 70R.

When detecting the wires W, the control unit 14B determines the direction in which the two wires W are arranged side by side. In addition, when the wire W comes into contact with the feed restricting portion 9A, the direction in which the two wires W are arranged in parallel can change. determine which direction to take.

FIG. 26 is a flow chart showing a fifth embodiment of control for aligning two wires W in a predetermined direction. An embodiment of the operation for canceling the parallelism of two wires W along the direction in which 70R opens and closes will be described.

At step SE1 in FIG. 26, the control unit 14B determines that the switch 13A is in a predetermined state, that is, the switch 13A is turned on in this example. Feed the wire W forward.

When the tips WS of the two wires W guided between the second movable locking member 70R and the fixed locking member 70C are fed to a position where they abut against the feed restricting portion 9A, the control section 14B performs step At SE3, the driving of the feed motor 33 is stopped. Stop feeding the wire W in the forward direction.

When the parallel detection sensor 100 detects the wires W in step SE4, the controller 14B determines the direction in which the two wires W are arranged in parallel in step SE5. When the control section 14B determines that the two wires W are arranged in a normal manner so as to intersect in the opening/closing direction of the second movable locking member 70R, the normal binding operation described above is performed in step SE6. Execute.

On the other hand, if the control unit 14B determines that the two wires W are arranged in parallel along the direction in which the second movable locking member 70R opens and closes, the control unit 14B performs step SE7, for example, as described above. , the first movable locking member 70L and the second movable locking member 70R are opened and closed, and the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes is eliminated. to run.

FIG. 27 is a side view showing an example of the main configuration of a reinforcing bar binding machine provided with a parallel elimination member, FIG. 28 is a sectional view showing an example of the main configuration of the reinforcing bar binding machine provided with the parallel elimination member, and FIG. 30 is a top view showing an example of the main configuration of a reinforcing bar binding machine provided with a parallel elimination member, and FIG. 30 is a functional block diagram showing an example of the control function of the reinforcing bar binding machine provided with the parallel elimination member.

The reinforcing bar binding machine 1D includes a parallel elimination member 110 that eliminates a predetermined parallel state of two wires W. As shown in FIG. The parallel elimination member 110 is provided movably between a position separated from the two wires W passing between the second movable locking member 70R and the fixed locking member 70C and a position in contact with the solenoid. and the like. The parallel elimination member 110 has a width capable of coming into contact with two wires W when the two wires W are arranged side by side along the direction in which the second movable locking member 70R opens and closes. In addition, when the surface of the parallel elimination member 110 in contact with the two wires W has a form in which the two wires W are arranged in parallel along the direction in which the second movable locking member 70R opens and closes, one wire A parallel elimination surface 110a is formed so as to be inclined in a direction in which it contacts W first.

The control unit 14C estimates the parallel state of the two wires W from the current flowing through the motor 80 detected by the current detection unit 16A, or detects the parallel state of the two wires W with the parallel detection sensor 100. , drives the drive unit 111 according to the parallel state of the two wires.

FIG. 31 is a flow chart showing a sixth embodiment of control for arranging two wires in parallel in a predetermined direction. An embodiment of the operation for canceling the parallelism of two wires W along the line will be described.

When the control unit 14C determines that the switch 13A is in a predetermined state, that is, the switch 13A is turned on in this example, in step SF1 of FIG. Feed the wire W forward.

When the tips WS of the two wires W guided between the second movable locking member 70R and the fixed locking member 70C are fed to a position where they abut against the feed restricting portion 9A, the control section 14C performs step At SF3, the driving of the feed motor 33 is stopped. Stop feeding the wire W in the forward direction.

In step SF4, the control unit 14C detects the current flowing through the motor 80 detected by the current detection unit 16A when the locking member 70 is closed, or the parallel detection sensor 100 detects that the two wires W are connected in parallel. Guess and judge the direction to do.

When the control unit 14C determines in step SF5 that the two wires W are in a normal configuration in which the two wires W intersect and are arranged side by side in the direction in which the second movable locking member 70R opens and closes, in step SF6 the above-described normal perform the tying action of

On the other hand, when the controller 14C determines that the two wires W are arranged in parallel along the direction in which the second movable locking member 70R opens and closes, the controller 14C turns off the driver 111 in step SF7. By driving, the parallel elimination member 110 is moved to a position where the parallel elimination surface 110a is in contact with the wire W. As shown in FIG. As a result, the parallelism of the two wires W along the opening/closing direction of the second movable locking member 70R is eliminated.

In addition, the operation of pushing the guide 51A or the like with the parallel elimination member to vibrate the two wires W to eliminate the parallelism of the two wires W along the direction in which the second movable locking member 70R opens and closes. can be executed.

<Action and effect of guiding the wire with the guidance guide>
32A, 32B, and 32C are explanatory diagrams showing the movement of the wire in the guiding guide. Next, the effect of guiding the wire W with the guiding guide 51A will be described.

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

As described above, assuming that the trajectory of the wire W that is curled by the curl guide 50 to form the loop Ru is an ellipse, if the length in the major axis direction is about 75 mm or more and 100 mm or less, the side portion 55R is The approach angle α1 of the wire W entering toward the third guiding portion 55R1 becomes 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 moves toward the third guide portion 55R1. The resistance increases when guided along the guide portion 55R1. Therefore, there is a possibility that the wire W will not go between the narrowest portion 55EL2 of the first guide portion 55L1 and the narrowest portion 55ER2 of the third guide portion 55R1, causing a feeding failure.

Therefore, the entrance angle restricting portion 56A is provided so that the tip of the wire W entering toward the third guide portion 55R1 of the side surface portion 55R is moved between the narrowest portion 55EL2 of the first guide portion 55L1 and the third guide portion. It is directed between the narrowest portion 55ER2 of 55R1.

That is, the wire W entering between the side portion 55L and the side portion 55R of the first guide portion 55 enters the side portion 55R toward the third guiding portion 55R1, thereby 32B, the wire W located between 55R and 55R is in contact with the approach angle restricting portion 56A. When the wire W comes into contact with the approach angle restricting portion 56A, the tip WS of the wire W moves between the narrowest portion 55EL2 of the first guide portion 55L1 and the narrowest portion of the third guide portion 55R1 with the approach angle restricting portion 56A as a fulcrum. A force that tends to rotate the wire W is applied to the wire W in the direction between the portions 55ER2.

As a result, as shown in FIG. 32C, the entry angle α2 of the wire W entering toward the third guide portion 55R1 of the side surface portion 55R becomes smaller (α2<α1), and the tip WS of the wire W It goes between the narrowest portion 55EL2 of the guiding portion 55L1 and the narrowest portion 55ER2 of the third guiding portion 55R1. Therefore, the wire W curled by the curl guide 50 can be introduced between the pair of the second guiding portion 55L2 and the fourth guiding portion 55R2 of the first guide portion 55. FIG.

1A, 1B, 1C... Reinforcement binding machine, 10A... Main unit, 14A... Control unit (parallel state estimation means) 14B, 14C... Control unit, 16A... Current detection unit (parallel state guessing means), 2A... magazine (accommodating portion), 20... reel, 21... hub portion, 22, 23... flange portion, 3A... wire feeding portion, 30L... first feed gear (feed member), 31L: tooth portion, 32L: groove portion, 30R: second feed gear (feed member), 31R: tooth portion, 32R: groove portion, 33. Feed motor 36 First displacement member 37 Second displacement member 38 Spring _4A1 First wire guide _4A2 Second Wire guide 5A Curl forming part 50 Curl guide 51A Induction guide 53 Retreat mechanism 53a First guide pin 53b Second guide Pins 53c... Third guide pin 55... First guide part 55L... Side part 55R... Side part 55D... Bottom part 55L1... First guide pin Guide portion 55L2 Second guide portion 55R1 Third guide portion 55R2 Fourth guide portion 55S Converging passage 55E1 Open end 55E2 Narrowest portion 55EL1 Opening end portion 55ER1 Opening end portion 55EL2 Narrowest portion 55ER2 Narrowest portion 55EL3 Virtual line 56A, 56B, 56C . . . Approach angle regulating portion 57 .. Second guide portion 57a .. Guide surface 6A .. Cutting portion 60 . Transmission mechanism 7A Binding portion 70 Locking member 70L First movable locking member 70R Second movable locking member 70C Fixed hook Stop member 71 Operation member 71a Opening/closing pin 71b1 Bending portion 71b2 Bending portion 72 Rotating shaft 73 Opening/closing guide hole 74 Rotation regulation unit 8A Drive unit 80 Motor 81 Reducer 9A, 9B Feed regulation unit 90 Parallel regulation unit 100 Parallel detection sensor 110... Parallel elimination member, 111... Drive part, W... Wire

Claims (12)

a wire feeding unit for feeding two wires wound around a bundle;
a binding part having at least a pair of locking members that can be opened and closed, and twisting the two wires locked by closing the pair of locking members;
a control unit for executing an operation to eliminate the parallelism of the two wires along the direction in which the pair of locking members open and close ,
The control unit estimates a parallel state of two wires passing between the pair of locking members,
Assuming that the two wires are arranged in parallel along the direction in which the pair of locking members open and close, the parallelism of the two wires in the direction in which the pair of locking members open and close is eliminated. perform an action
binding machine. 2. The control unit according to the load applied to the pair of locking members, wherein the two wires are arranged in parallel along the direction in which the pair of locking members open and close. tying machine. A current detection unit that detects a current flowing in a motor that drives the binding unit,
The bundling according to claim 1 , wherein the control unit estimates that the two wires are arranged in parallel along the direction in which the pair of locking members open and close based on the current detected by the current detection unit. machine. 4. The binding machine according to claim 3 , wherein the control unit switches a current threshold for estimating that two wires are arranged in parallel along the direction in which the pair of locking members open and close. A parallel detection sensor that detects a parallel state of two wires passing between the pair of locking members,
Based on the parallel state of the wires detected by the parallel detection sensor, the control unit estimates that the pair of locking members are arranged in parallel along the opening/closing direction. 2. The binding machine of claim 1 , wherein the operation is performed to de-parallel the two wires along . The control unit closes the pair of locking members and opens the pair of locking members, assuming that the two wires are arranged in parallel along the direction in which the pair of locking members open and close. 5. The binding machine according to any one of claims 1 to 4, wherein the pair of locking members performs an operation to eliminate the parallelism of the two wires along the opening/closing direction. The control unit closes the pair of locking members, and assuming that two wires are arranged in parallel along the direction in which the pair of locking members open and closes, opens and closes the pair of locking members. 6. The binding machine according to any one of claims 1 to 5, wherein the pair of locking members perform an operation to eliminate the parallelism of the two wires along the opening/closing direction. Assuming that the two wires are arranged in parallel along the direction in which the pair of locking members open and close, the control unit feeds the two wires in the direction in which the pair of locking members open and close. 6. The binding machine according to any one of claims 1 to 5, which performs an operation to eliminate the parallelism of two wires along the . A parallel elimination member is provided that contacts at least one of the two wires passing between the pair of locking members and eliminates the parallelism of the two wires along the direction in which the pair of locking members open and close. The binding machine according to any one of claims 1 to 5 . 2. A parallel elimination member for vibrating two wires passing between the pair of locking members to eliminate the parallelism of the two wires along the direction in which the pair of locking members open and close. The binding machine according to any one of - Claim 5 . a wire feeding unit for feeding two wires wound around a bundle;
a binding part having at least a pair of locking members that can be opened and closed, and twisting the two wires locked by closing the pair of locking members;
a control unit that closes and then opens the pair of locking members, and executes an operation of closing the pair of locking members again before twisting the wire at the binding portion;
tying machine with a wire feeding unit for feeding two wires wound around a bundle;
a wire guide that parallels the two wires W along the axial direction of the loop formed by the two wires;
a binding part having at least a pair of locking members that can be opened and closed along the axial direction of the loop, and twisting the two wires locked by closing the pair of locking members;
and a control unit for executing an operation to eliminate the parallelism of the two wires along the direction in which the pair of locking members open and close.
binding machine.

Images