WO2022209274A1

WO2022209274A1 - Bending machine

Info

Publication number: WO2022209274A1
Application number: PCT/JP2022/004225
Authority: WO
Inventors: 恭平片桐
Original assignee: 日本電産株式会社
Priority date: 2021-04-01
Filing date: 2022-02-03
Publication date: 2022-10-06
Also published as: DE112022002014T5; CN117120178A

Abstract

This bending machine comprises: a first molding die; and a second molding die capable of moving relative to the first molding die, wherein the first molding die and the second molding die are used to bend a wire having a rectangular cross section. The bending machine has a pair of support parts that support the wire between the first molding die and the second molding die and at different positions in the longitudinal direction of the wire before bending, and that are capable of moving away from each other in the longitudinal direction. The second molding die moves toward the first molding die to a position between the pair of support parts in the longitudinal direction.

Description

bending equipment

The present invention relates to a bending device.

A bending device that bends a wire rod is known. As such a bending apparatus, for example, Japanese Patent Application Laid-Open No. 2020-61900 describes a first convex forming with a part of a wire rod placed on a second convex forming portion of a second forming die. After performing the first forming for forming the convex portion between the part and the second convex forming portion, the first roller is moved downward with respect to the second forming die to form a shoulder portion on the wire rod. A segment forming apparatus is disclosed for performing a second forming that

The segment molding device is provided with a second roller that is arranged outside the first roller with respect to the mold and that can move up and down. Before executing the first molding, the segment molding device presses the second molding die with a portion of the wire rod placed on the second convex molding portion of the second molding die. 2 rollers are moved downward to perform pre-bending of the wire rod along the second convex forming portion.

Japanese publication: JP 2020-61900

In the segment forming apparatus of Patent Document 1, the formability of the wire can be improved by pre-bending. As described above, in the segment forming apparatus, the second roller is moved downward with respect to the wire, and the wire is bent along the second convex forming portion, thereby performing pre-bending. . In the segment forming apparatus, the pre-bending forming portion of the wire rod is the center portion in the longitudinal direction of the wire rod, and the position where the second roller applies force to the wire rod is the end portion of the wire rod in the longitudinal direction. .

On the other hand, it is required to improve the formability by forming the wire in the vicinity of the support point that supports the wire.

An object of the present invention is to provide a bending device capable of improving formability.

A bending apparatus according to an embodiment of the present invention includes a first forming die and a second forming die movable with respect to the first forming die, wherein the first forming die and the second forming die This is a device that bends a wire rod with a rectangular cross section using a mold. This bending apparatus supports the wire rod between the first mold and the second mold and at different positions in the longitudinal direction of the wire rod before bending, and separates the wire rod in the longitudinal direction. It has a pair of movable supports. The second molding die moves toward the first molding die at a position between the pair of support portions in the longitudinal direction.

According to the bending device according to one embodiment of the present invention, formability can be improved.

FIG. 1 is a diagram showing a schematic configuration of a bending apparatus according to Embodiment 1. FIG. 2 is an end view taken along line II-II in FIG. 1. FIG. FIG. 3A is a diagram schematically showing how a wire is bent by a bending device. FIG. 3B is a diagram schematically showing how a wire is bent by a bending device. FIG. 3C is a diagram schematically showing how a wire is bent by a bending device. FIG. 4 is a diagram showing a schematic configuration of a bending apparatus according to Embodiment 2. FIG. FIG. 5 is a view of part of the return mechanism as viewed in arrow A of FIG. FIG. 6 is a diagram showing a schematic configuration of a bending apparatus according to Embodiment 3. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated. Also, the dimensions of the constituent members in each drawing do not faithfully represent the actual dimensions of the constituent members, the dimensional ratios of the respective constituent members, and the like.

In the following description, when the bending device 1 is installed, the vertical direction of the bending device 1 is referred to as the "vertical direction". Further, when the bending apparatus 1 is installed, the horizontal direction of the bending apparatus 1 and the direction in which the pair of support portions 31 are separated from each other is referred to as the "left-right direction." Further, a direction orthogonal to the vertical direction and the horizontal direction of the bending device 1 in a state where the bending device 1 is installed is referred to as the "front-rear direction". The longitudinal direction of the wire rod W placed in the bending apparatus 1 is called "longitudinal direction".

<Embodiment 1>
(bending device)
FIG. 1 is a diagram showing a schematic configuration of a bending apparatus 1 according to Embodiment 1. FIG. A bending apparatus 1 is an apparatus for bending a wire rod W such as a coil into a U shape. A cross section of the wire rod W perpendicular to the longitudinal direction is rectangular. The wire rod W may be a member other than a coil as long as it is a linear member having a rectangular cross section. The bending device 1 may bend the wire rod W into a shape other than the U shape.

The bending apparatus 1 has a first molding die 10, a second molding die 20, and a wire mounting portion 30. The bending apparatus 1 bends the wire W supported by the wire mounting portion 30 using the first forming die 10 and the second forming die 20 . In the bending apparatus 1, the first forming die 10 and the second forming die 20 are positioned side by side in the vertical direction. The wire mounting part 30 is positioned between the first molding die 10 and the second molding die 20 in the vertical direction.

The first molding die 10 is fixed to a stationary platen (not shown). The first molding die 10 has a recess 10a for molding the wire W. As shown in FIG. The concave portion 10a of the first molding die 10 opens upward. In the present embodiment, in the concave portion 10a of the first mold 10, when the first mold 10 is viewed in the front-rear direction, the center portion of the bottom surface in the left-right direction is the deepest. The first mold 10 is, for example, a die.

The second molding die 20 is vertically movable with respect to the first molding die 10 . The second mold 20 is supported by a movable platen (not shown). The second molding die 20 can move in a direction toward the first molding die 10 and in a direction away from the first molding die 10 by movement of the movable platen.

The second molding die 20 has a convex portion 20a capable of molding the wire rod W into a predetermined shape between the concave portion 10a of the first molding die 10 and the concave portion 10a. The convex portion 20 a is positioned at the lower end portion of the second molding die 20 . In the convex portion 20a, the central portion in the left-right direction of the tip portion protrudes most downward. That is, the convex portion 20a has a tip portion 20b positioned at the tip in the moving direction of the second molding die 20. As shown in FIG. When the second mold 20 is closest to the first mold 10 , at least a portion of the convex portion 20 a of the second mold 20 is positioned inside the concave portion 10 a of the first mold 10 .

As will be described later, the wire rod W supported by the wire rod mounting portion 30 is deformed when the convex portion 20a of the second molding die 20 comes into contact with the wire rod W. As shown in FIG. Therefore, the portion where the tip 20b of the protrusion 20a of the second mold 20 contacts the wire W is the deformed portion Wa of the wire W. As shown in FIG.

The wire mounting portion 30 supports the wire W at two points in the longitudinal direction. The support position of the wire W on the wire mounting portion 30 is movable in the left-right direction. Specifically, the wire mounting portion 30 has a pair of support portions 31 , a moving portion 33 and a position restricting portion 39 .

The pair of support portions 31 support the wire rod W at different positions in the longitudinal direction. The pair of support portions 31 are positioned at the same position in the vertical direction. The pair of support portions 31 are located at positions sandwiching the contact position where the second mold 20 that has moved downward contacts the wire rod W in the left-right direction. In this embodiment, the horizontal direction and the longitudinal direction are the same direction.

Therefore, the pair of support portions 31 are positioned on both sides of the wire W in the longitudinal direction with respect to the deformed portion Wa of the wire W that is deformed by the movement of the second molding die 20 . Specifically, one support portion 31 of the pair of support portions 31 is positioned on one side in the left-right direction with respect to the deformed portion Wa of the wire W, and the other support portion 31 of the pair of support portions 31 is It is located on the other side of the deformed portion Wa of the wire W in the left-right direction.

The pair of support portions 31 are positioned at a distance larger than the width of the tip portion 20b of the convex portion 20a of the second molding die 20 in the left-right direction. That is, the pair of support portions 31 has a gap in the longitudinal direction that is larger than the width of the tip portion 20b positioned at the tip of the second molding die 20 in the moving direction.

The pair of support parts 31 can be moved in the left-right direction by a moving part 33, which will be described later. The pair of support portions 31 are relatively movable in the separating direction and the approaching direction. In this embodiment, the pair of support portions 31 are movable by the moving portion 33 .

FIG. 2 is an end view taken along line II-II in FIG. As shown in FIG. 2, the pair of support portions 31 are rotatably connected via a rotating shaft 32 to a slider 35 of a moving portion 33, which will be described later. In the present embodiment, the pair of support portions 31 are rollers rotatable about a rotation axis P of a rotation shaft 32 extending in the front-rear direction. Therefore, the pair of support portions 31 rotate with the longitudinal direction as the tangential direction. That is, each of the pair of support portions 31 is a roller rotatable with its longitudinal direction as a tangential direction.

As a result, when the wire rod W supported by the pair of support portions 31 at different positions in the longitudinal direction is deformed by the second molding die 20 toward the first molding die 10 , the wire rod W is supported by the pair of support portions 31 . It can prevent rubbing against the part supported by. Therefore, when the second forming die 20 deforms the wire W, damage to the wire W can be suppressed. In particular, when the wire W is a coil, it is possible to suppress damage to the insulating coating covering the surface of the coil.

The pair of support portions 31 has grooves 31b extending in the circumferential direction on the outer peripheral surface 31a. The width of the opening of the groove 31b is larger than the width of the wire W. Therefore, the wire rod W can be accommodated in the groove 31b. Thereby, the wire rod W can be arranged in the groove 31 b located on the outer peripheral surface 31 a of the support portion 31 . Therefore, the wire rod W can be held on the outer peripheral surface 31a of the support portion 31 without shifting in the axial direction of the rotation axis P. As shown in FIG. Therefore, the wire rod W can be bent more accurately. The axial direction of the rotation axis P is the direction in which the rotation axis P extends.

It should be noted that the groove 31b may have a tapered portion on the side surface such that the width dimension of the groove 31b decreases from the opening side to the bottom side. Thereby, even when the width of the wire W is different, the wire W can be easily held by the side surface of the groove 31b.

The moving part 33 can move the pair of supporting parts 31 in the left-right direction. Specifically, as shown in FIG. 1 , the moving portion 33 has a rail 34 , a pair of sliders 35 , a moving portion support base 36 and an elastic support portion 38 . The rail 34 is a prism-shaped member extending in the left-right direction. The rail 34 is fixed to a moving part support base 36 . The pair of sliders 35 are each movable in the left-right direction with respect to the rails 34 . Thus, the moving part 33 of this embodiment is a linear slider. Note that the moving unit 33 may have any configuration as long as it can move the slider in the left-right direction.

One of the pair of support portions 31 is rotatably supported by one slider 35 of the pair of sliders 35 via a rotating shaft 32 . The other support portion 31 of the pair of support portions 31 is rotatably supported by the other slider 35 of the pair of sliders 35 via a rotating shaft 32 .

A position restricting portion 39 is fixed to each of the left and right ends of the rail 34 . The position restricting portion 39 can restrict the pair of sliders 35 from moving outward from the left and right ends of the rail 34 . That is, the bending apparatus 1 has a position regulating portion 39 that defines the position at which the pair of support portions 31 are furthest apart in the longitudinal direction.

Thereby, the movable range of the pair of support parts 31 can be determined when the pair of support parts 31 move away from each other in the longitudinal direction. Therefore, after bending the wire W, the pair of support portions 31 can be quickly returned to their original positions. Therefore, the productivity when bending the wire rod W can be improved.

The elastic support portion 38 connects the slider 35 of the moving portion 33 and the position regulating portion 39 . Thereby, the elastic support portion 38 elastically supports the slider 35 of the moving portion 33 in the lateral direction with respect to the position regulating portion 39 . The elastic support portion 38 generates an elastic restoring force by deforming in the compression direction. The elastic support portion 38 is, for example, a compression spring. Therefore, the elastic support portion 38 is the spring of the present invention.

Although the details will be described later, the support portion 31 rotatably supported by the slider 35 of the moving portion 33 moves away from the deformed portion Wa of the wire W when the wire W is bent by the second molding die 20. move to In this case, the elastic support portion 38 is elastically deformed in the compression direction. The elastic support portion 38 elastically deformed in the compression direction in this manner gives an elastic restoring force to the slider 35 in a direction approaching the deformed portion Wa of the wire W. As shown in FIG.

In order to prevent buckling of the elastic support portion 38, a guide member extending in the left-right direction may be positioned inside the elastic support portion 38.

Since the moving part 33 has the elastic supporting part 38 described above, the moving part 33 can move the pair of supporting parts 31 in a direction to bring them closer to each other in the longitudinal direction. That is, in the present embodiment, the moving portion 33 has an elastic support portion 38 that moves the pair of support portions 31 closer in the longitudinal direction by elastic restoring force. This makes it possible to easily realize the structure of the moving part 33 that moves the pair of supporting parts 31 closer together in the longitudinal direction.

(Operation of bending device)
Next, the operation of the bending apparatus 1 having the configuration described above will be described with reference to FIGS. 3A to 3C. 3A to 3C are diagrams schematically showing how the wire rod W is bent by the bending apparatus 1. FIG.

As shown in FIG. 3A, the wire rod W is bent downward by moving the second mold 20 downward and bringing the tip 20b of the projection 20a of the second mold 20 into contact with the wire rod W. As a result, the wire rod W is bent in a V shape when the bending apparatus 1 is viewed in the front-rear direction. A portion where the wire rod W is bent by the tip 20b of the projection 20a of the second molding die 20 is the deformed portion Wa of the wire rod W. As shown in FIG. The process shown in FIG. 3A is the pre-bending process of the wire rod W by the second mold 20 .

The wire rod W bent by the second molding die 20 is supported by a pair of support portions 31. The pair of support portions 31 are positioned on both sides of the deformed portion Wa of the wire W in the longitudinal direction. The pair of support portions 31 can be moved in the left-right direction by the moving portion 33 . Therefore, when the wire W is bent convexly downward by the second forming die 20, the pair of support portions 31 move in the left-right direction and in the direction of separation, as indicated by the thick solid line arrows in FIG. 3A.

Thus, when the wire rod W is bent by the second molding die 20, the pair of support parts 31 moves in the left-right direction and in the direction of separation according to the bending of the wire rod W. Therefore, according to the deformation of the wire W, the wire W can be supported by the pair of support portions 31 at a position as close as possible to the deformed portion Wa. Therefore, the formability of the wire rod W can be improved.

When the wire W is bent downward by the second molding die 20 as described above, it moves downward toward the central portion of the wire W in the longitudinal direction with respect to the pair of support portions 31 . Since the pair of support portions 31 are rotatable about the rotation axis P, the movement of the wire W as described above rotates toward the central portion in the longitudinal direction of the wire W as indicated by the solid arrow in FIG. 3A. do. Thereby, it is possible to suppress the generation of a large frictional force at the contact portion between the pair of support portions 31 and the wire W. Therefore, it is possible to suppress the formation of dents, scratches, and the like on the wire rod W.

In the present embodiment, of the pair of support parts 31, the support part 31 located on the left side when the bending apparatus 1 is viewed in the front-rear direction rotates clockwise. Of the pair of support portions 31, the support portion 31 located on the right side as viewed in the front-rear direction of the bending apparatus 1 rotates counterclockwise. That is, the pair of support portions 31 rotates in a direction in which the wire rod W is sent out to the central portion in the left-right direction.

As shown in FIG. 3B, the second molding die 20 is moved further downward to bring the projections 20a of the second molding die 20 closer to the bottom surfaces of the recesses 10a of the first molding die 10. As shown in FIG. The wire rod W is bent by the concave portion 10 a of the first mold 10 and the convex portion 20 a of the second mold 20 . As shown in FIG. 3A , since the wire rod W is pre-bent by the protrusions 20 a of the second mold 20 , the wire rod is bent by the recesses 10 a of the first mold 10 and the protrusions 20 a of the second mold 20 . W can be easily molded.

In the state shown in FIG. 3B, the pair of support parts 31 are pushed by the second molding die 20 and the wire rod W in the left-right direction and in the direction of separation. In this state, an elastic restoring force is applied to the pair of support portions 31 by the elastic support portion 38 in the left-right direction and in the approaching direction.

After that, as shown in FIG. 3C, the second molding die 20 is moved upward and separated from the first molding die 10, and then the formed wire rod W is removed from the concave portion 10a of the first molding die 10. take out.

As indicated by the thick solid line arrows in FIG. 3C, the pair of support portions 31 move in the left-right direction and in the approaching direction due to the elastic restoring force of the elastic support portions 38 .

The bending apparatus 1 of this embodiment has a first molding die 10 and a second molding die 20 movable with respect to the first molding die 10, and the first molding die 10 and the second molding die 20 This is a bending device for bending a wire rod W having a rectangular cross section. The bending apparatus 1 supports the wire rod W between the first mold 10 and the second mold 20 and at different positions in the longitudinal direction of the wire rod W before bending, and separates the wire rod W in the longitudinal direction. It has a pair of support parts 31 which can move to the inside. The second molding die 20 moves toward the first molding die 10 at a position between the pair of support portions 31 in the longitudinal direction.

As a result, when the wire rod W supported at different positions in the longitudinal direction by the pair of support portions 31 is deformed toward the first mold 10 by the second molding die 20, the pair of support portions 31 are moved to the wire rod W. can be moved longitudinally away from the . Therefore, the wire W can be bent by the second forming die 20 while maintaining the distance between the position where the wire W is deformed by the second forming die 20 and the position where the wire W is supported by the pair of support portions 31 . . Therefore, formability when bending the wire W can be improved.

In this embodiment, the pair of support portions 31 are positioned on both sides of the wire rod W in the longitudinal direction with respect to the deformation portion Wa of the wire rod W that is deformed by the movement of the second molding die 20 .

Thereby, the wire rod W can be supported by the pair of support portions 31 on both longitudinal sides of the deformed portion Wa of the wire rod W that is deformed by the movement of the second molding die 20 . Therefore, the bending of the wire rod W by the second molding die 20 can be performed more reliably and accurately. Moreover, the pair of support portions 31 can be moved apart in the longitudinal direction while the wire rod W is being bent by the second molding die 20 .

In this embodiment, the pair of support portions 31 has a gap in the longitudinal direction that is larger than the width of the tip portion 20b positioned at the tip of the second molding die 20 in the moving direction. As a result, while the wire rod W is formed by the second mold 20, the pair of support portions 31 can be easily moved in a direction separating them when the second mold 20 moves toward the first mold 10. can.

In this embodiment, the bending device 1 has a moving part 33 that moves the pair of supporting parts 31 in the longitudinal direction.

Thereby, the pair of support parts 31 can be moved in the longitudinal direction of the wire rod W before processing in accordance with the movement of the second mold 20 . For example, the pair of support portions 31 can be moved in the longitudinal direction away from each other in accordance with the forming of the wire W by the second forming die 20 . In addition, the pair of supporting portions 31 positioned apart from each other can be moved in the longitudinal direction by the moving portion 33 .

In this embodiment, the moving part 33 moves the pair of support parts 31 in a direction to approach them in the longitudinal direction. As a result, when the wire W is bent by the second forming die 20, the pair of support portions 31 are moved in the longitudinal direction away from each other. The support portion 31 is moved in the direction of approaching in the longitudinal direction. Therefore, with a simple configuration, it is possible to realize a configuration in which the pair of support portions 31 moves in the longitudinal direction away from or in the approaching direction.

<Embodiment 2>
FIG. 4 is a diagram showing a schematic configuration of a bending device 101 according to Embodiment 2. As shown in FIG. In the bending apparatus 101 of the second embodiment, the configuration of the moving section 133 is different from that of the moving section 33 of the first embodiment. Therefore, hereinafter, the same reference numerals are assigned to the same configurations as in the first embodiment, and the description thereof is omitted, and only the portions different from the first embodiment will be described.

The moving part 133 can move the pair of supporting parts 31 in the left-right direction. Specifically, the moving portion 133 has a rail 34 , a pair of sliders 35 , a moving portion support base 36 and a return mechanism 140 . The configuration of the moving portion 133 other than the return mechanism 140 is the same as the configuration of the moving portion 33 of the first embodiment. Therefore, only the return mechanism 140 will be described below.

The return mechanism 140 returns the slider 35 to which the support portion 31 is rotatably connected to its original position on the rail 34 . Specifically, the return mechanism 140 has a pair of pulleys 141 , a pulley support portion 142 , a weight 143 , a connection member 144 and a connection member support portion 145 .

A pair of pulleys 141 are rotatably supported by a pulley support portion 142 about a rotation shaft extending in the left-right direction. A pair of pulleys 141 are positioned above the pulley support portion 142 . The pulley support portion 142 extends upward from the moving portion support base 36 . A lower portion of the pulley support portion 142 is fixed to the moving portion support base 36 .

FIG. 5 is a view of part of the return mechanism 140 as viewed from the arrow A in FIG. A connecting member 144, which is a linear member, is put on each of the pair of pulleys 141. As shown in FIG. Therefore, the connection member 144 can move in the front-rear direction by the rotation of the pulley 141 about the rotation shaft extending in the left-right direction.

As shown in FIG. 4, one end of the connecting member 144 is connected to the connecting member supporting portion 145. As shown in FIG. The connection member support portion 145 has a pair of slider connection portions 146 and a pin 147 .

Each slider connection 146 extends from one slider 35 toward another slider 35 . That is, the pair of slider connecting portions 146 are located at positions facing the pair of sliders 35 . Each slider connection portion 146 is fixed to the slider 35 . Each slider connecting portion 146 has a large-diameter portion 146a at its distal end, the diameter of which is larger than that of its proximal end.

The pin 147 is a cylindrical member extending in the front-rear direction. One end of the pin 147 is fixed to the center of the moving part support 36 in the left-right direction at a position lower than the slider connection part 146 . Therefore, the pin 147 protrudes forward from the central portion of the moving part support base 36 in the left-right direction.

One end of the connecting member 144 is wound around the pin 147 and one end of the connecting member 144 is connected to the slider connecting portion 146 . As shown in FIG. 5, the other end of connecting member 144 is connected to weight 143 . Thereby, one end of the connection member 144 is connected to the slider 35 via the connection member support portion 145 , and the other end of the connection member 144 is connected to the weight 143 .

With the above configuration, the weight of the weight 143 is applied to the slider 35 via the connecting member 144 and the connecting member supporting portion 145 as a force to move the bending device 101 to the central portion in the left-right direction. As a result, the slider 35 is positioned at the central portion of the bending device 101 in the left-right direction when no force is applied to the support portion 31 rotatably supported by the slider 35 in a direction separating the support portion 31 . Therefore, after the wire W is bent by the first molding die 10 and the second molding die 20, the pair of support portions 31 can be returned to their original positions.

In this embodiment, the moving part 133 has a weight 143 that moves the pair of supporting parts 31 closer in the longitudinal direction by its own weight.

Thereby, it is possible to easily realize the structure of the moving part 133 that moves the pair of supporting parts 31 in the longitudinal direction.

<Embodiment 3>
FIG. 6 is a diagram showing a schematic configuration of a bending device 201 according to Embodiment 3. As shown in FIG. In the bending apparatus 201 of the third embodiment, the direction of movement of the pair of support portions 31 is different from the direction of movement of the support portions 31 of the first embodiment. Therefore, below, the same code|symbol is attached|subjected to the same structure as Embodiment 1, description is abbreviate|omitted, and only a different part from Embodiment 1 is demonstrated.

The bending device 201 has a first molding die 10, a second molding die 20, and a wire mounting portion 230. The wire mounting portion 230 has a pair of support portions 31 , a moving portion 233 and a position restricting portion 39 . The moving part 233 can move the pair of support parts 31 obliquely upward with respect to the first molding die 10 .

Specifically, the moving part 233 moves one of the pair of supporting parts 31 positioned to the left of the deformed part Wa of the wire W when the bending apparatus 201 is viewed from the front. 1 moving part 233a and a second moving part 233b capable of moving the other supporting part 31 of the pair of supporting parts 31 located on the right side of the deformed part Wa of the wire W. As shown in FIG. In addition, in the bending apparatus 201, the side where the moving part 233 is positioned with respect to the moving part support base 36 is defined as the front side.

The first moving part 233a can move one supporting part 31 leftward and upward with respect to the deformed part Wa of the wire W when the bending device 201 is viewed from the front. The first moving part 233a moves one support part 31 toward the deformed part Wa of the wire W from a position separated from the deformed part Wa in the left direction and upward when the bending device 201 is viewed from the front. It is possible to move in the right direction, which is the direction, and downward.

The second moving part 233b can move the other supporting part 31 rightward and upward with respect to the deformed part Wa of the wire W when the bending device 201 is viewed from the front. When viewed from the front of the bending device 201, the second moving part 233b moves the other supporting part 31 toward the deformed part Wa of the wire W from a position separated from the deformed part Wa in the right direction and upward. direction left and downward.

In this way, the moving direction of one support portion 31 by the first moving portion 233a and the moving direction of the other support portion 31 by the second moving portion 233b intersect.

The first moving portion 233a has a first rail 234a and a first slider 235a. The first rail 234a extends obliquely upward as it moves away from the deformed portion Wa of the wire W to the left when the bending apparatus 201 is viewed from the front. The first slider 235a moves obliquely along the first rail 234a.

The second moving portion 233b has a second rail 234b and a second slider 235b. The second rail 234b extends obliquely upward as it moves away from the deformed portion Wa of the wire W to the right when the bending device 201 is viewed from the front. The second slider 235b moves obliquely along the second rail 234b.

The first rail 234a and the second rail 234b extend in a crossing direction when the bending device 201 is viewed in the front-rear direction. As a result, the pair of support parts 31 can move in a direction intersecting the longitudinal direction and in a direction away from the first molding die 10 as the distance increases.

The wire rod W is bent at the deformed portion Wa by the second mold 20, so that both ends in the left-right direction are located closer to the second mold 20 than the deformed portion Wa. As described above, the pair of support portions 31 that support the wire W in the longitudinal direction are arranged in a direction intersecting the longitudinal direction and in a direction away from the first molding die 10 as the wire W moves away from the deformed portion Wa in the left-right direction. , the pair of support portions 31 can be moved along with the deformation of the wire rod W as described above. Therefore, the frictional force at the contact points between the wire W and the pair of support portions 31 can be further reduced. As a result, the deformation portion Wa of the wire W can be easily deformed from the first forming die 10 side by the convex portion 20a of the second forming die 20, and the contact point of the wire W with the pair of support portions 31 can be changed. It is possible to suppress the occurrence of indentations, scratches, and the like.

Also, with the above configuration, the amount of movement of the pair of support portions 31 with respect to the downward movement of the second molding die 20 can be made larger than in the case of the first embodiment. Therefore, the elastic restoring force applied from the elastic support portion 38 to the pair of support portions 31 can be increased as compared with the configuration of the first embodiment. Therefore, the pair of support portions 31 can be returned to their original positions more reliably.

When the bending device 201 is viewed from the front, the position restricting portions 39 are positioned at the left end of the first rail 234a and the right end of the second rail 234b, respectively. As a result, the leftward movement range of the first slider 235a on the first rail 234a can be restricted, and the rightward movement range of the second slider 235b on the second rail 234b can be restricted.

<Other embodiments>
Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, without being limited to the above-described embodiment, it is possible to modify the above-described embodiment as appropriate without departing from the spirit thereof.

In each of the above embodiments, the cross section of the wire W perpendicular to the longitudinal direction is rectangular. However, the cross section perpendicular to the longitudinal direction of the wire may have rounded corners or a partially cut rectangular shape to the extent that the effects of the present invention can be obtained. good too.

In each embodiment, the pair of support parts 31 are rollers rotatable around the rotation axis P with respect to the

sliders

35, 235a, 235b. However, the pair of supports may not be rotatable and may be fixed relative to the slider.

In each of the above embodiments, the pair of support portions 31, which are rollers, have grooves 31b on the outer peripheral surface 31a. However, the pair of support portions may not have grooves on the outer peripheral surface.

In each of the above embodiments, the moving

parts

33 , 133 , 233 have

rails

34 , 234 a, 234 b ,

sliders

35 , 235 a, 235 b , elastic supporting parts 38 , and position restricting parts 39 . However, the moving part may have a moving mechanism other than the rail and the slider. The moving part does not have to have the elastic support part. The moving part does not have to have the position restricting part. The moving part may have an actuator capable of reciprocating movement. The slider may be controllable in position by an actuator.

In Embodiments 1 and 3, the moving

parts

33 and 233 have elastic support parts 38 that return the pair of support parts 31 to their original positions. In Embodiment 2, the moving part 133 has the return mechanism 140 that returns the pair of support parts 31 to their original positions by the weight of the weight 143 . However, the mechanism for returning the pair of support portions to their original positions may have other configurations such as position control by an actuator.

In each of the above-described embodiments, the pair of support portions 31 are each movable in the left-right direction. However, only one of the pair of supports may be movable.

In each of the above embodiments, the second mold 20 is movable with respect to the first mold 10. However, the first mold may be movable with respect to the second mold. The first mold and the second mold may each be movable.

In each of the above-described embodiments, the first mold 10 has the deepest recess 10a at the center of the bottom surface in the left-right direction. The second molding die 20 has a convex portion 20a that protrudes most downward at the central portion in the left-right direction of the tip portion. However, the concave portion of the first mold and the convex portion of the second mold may have shapes other than those described above. The first mold may have a convex portion and the second mold may have a concave portion. In this case, the portion of the wire that is in contact with the convex portion of the first mold is the deformed portion.

In each of the above embodiments, the wire rod W is supported at two points in the longitudinal direction by the pair of support portions 31 . However, the wire rod may be supported not only by the pair of supporting parts but also by other supporting parts. That is, the wire may be supported at three or more points in the longitudinal direction. In this case, two supporting portions that are close to the processed portion of the wire may be moved away from each other among the plurality of supporting portions.

In the third embodiment, the first moving part 233a is capable of moving one supporting part 31 leftward and upward with respect to the deformed part Wa of the wire W when the bending device 201 is viewed from the front. be. The second moving part 233b can move the other supporting part 31 rightward and upward with respect to the deformed part Wa of the wire W when the bending device 201 is viewed from the front.

However, the first moving part may be capable of moving one supporting part leftward and downward with respect to the deformed part of the wire when the bending apparatus is viewed from the front. The second moving part may be capable of moving the other supporting part rightward and downward with respect to the deformed part of the wire when the bending apparatus is viewed from the front.

The transfer jig of the present invention can be applied to a bending device that bends a wire rod.

Reference Signs List

1, 101, 201 Bending device 10 First mold 10a Concave portion 20 Second mold

20a Convex portion

20b Tip portions

30, 230 Wire mounting portion 31 Support portion 31a Outer peripheral surface 31b Groove 32

Rotary shafts

33, 133, 233 Moving portion 34 Rail 35 Slider 36 Moving part support base 38 Elastic support part 39 Position regulation part 140 Return mechanism 141 Pulley 142 Pulley support part 143 Weight 144 Connecting member 145 Connecting member supporting portion 146 Slider connecting portion 146a Large diameter portion 147 Pin 233a First moving portion 233b Second moving portion 234a First rail 234b Second rail 235a First slider 235b Second slider W Wire rod Wa Deformed portion P Rotational axis

Claims

a first mold;
a second mold movable relative to the first mold;
A bending device for bending a wire rod having a rectangular cross section with the first mold and the second mold,
A pair of supports that support the wire between the first mold and the second mold and at different positions in the longitudinal direction of the wire before bending, and are movable in the longitudinal direction in a direction separating from each other. has a part
The bending apparatus, wherein the second forming die moves in a direction approaching the first forming die at a position between the pair of support portions in the longitudinal direction.
In the bending apparatus according to claim 1,
In the bending device, the pair of support portions are positioned on both sides in the longitudinal direction with respect to the deformation portion of the wire that is deformed by the movement of the second molding die.
In the bending apparatus according to claim 1 or 2,
The bending device, wherein each of the pair of support portions is a roller rotatable with the longitudinal direction as a tangential direction.
In the bending apparatus according to claim 3,
The bending device, wherein the roller has a groove extending in a circumferential direction on an outer peripheral surface thereof.
In the bending apparatus according to any one of claims 1 to 4,
The bending device, wherein the pair of support portions has a gap in the longitudinal direction that is larger than a width of a distal end portion positioned at a distal end portion of the second molding die in a moving direction.
In the bending apparatus according to any one of claims 1 to 5,
A bending apparatus, comprising a position regulating portion that defines a position at which the pair of support portions are furthest apart in the longitudinal direction.
In the bending apparatus according to any one of claims 1 to 6,
A bending apparatus, comprising a moving part that moves the pair of support parts in the longitudinal direction.
In the bending apparatus according to claim 7,
The bending device, wherein the moving part moves the pair of supporting parts in a direction to approach each other in the longitudinal direction.
In the bending apparatus according to claim 8,
The bending device, wherein the moving part has a spring that moves the pair of supporting parts closer in the longitudinal direction by an elastic restoring force.
In the bending apparatus according to claim 8,
The bending device, wherein the moving part has a weight for moving the pair of supporting parts in the longitudinal direction by its own weight.
In the bending apparatus according to any one of claims 1 to 10,
The bending device, wherein the pair of support portions are movable in a direction intersecting the longitudinal direction and in a direction away from the first forming die as they are separated.