JP6654525B2 - Wire forming equipment - Google Patents

Description

  The present invention relates to a conductor forming apparatus, and more particularly, to a conductor forming apparatus for forming a bent portion in a conductor.

  Patent Document 1 discloses a wire forming apparatus. The lead wire forming apparatus includes a first bent portion bent in a first bending direction and a second bent portion perpendicular to the first bending direction on a lead wire portion (lead wire) protruding from a winding of a coil used for a motor stator. Forming a second bent portion bent in the bending direction. Specifically, the lead wire forming apparatus includes a first forming die and a second forming die that approach each other along the X direction to form an edgewise bent portion and a flatwise bent portion on a lead wire portion, And a third molding die that forms an edgewise bent portion at the tip of the lead wire portion in cooperation with the second molding die while cooperating with the second molding die. Further, in the wire forming apparatus according to Patent Literature 1, the coil supporting portion that supports the coil rotates around the rotation axis. Thereby, the lead wire portion is bent on the most proximal end side near the coil, and an edgewise bent portion is formed. Here, the edgewise bent portion is a bent portion in which a lead wire portion having a rectangular cross section is bent in a direction perpendicular to the short side surface, and the flatwise bent portion is a lead wire portion having a rectangular cross section is long. It is a bent portion bent in a direction orthogonal to the side surface.

JP 2015-100251 A

  In the wire forming apparatus described in Patent Literature 1, a first bending operation for forming an edgewise bent portion and a flatwise bent portion by cooperation of a first forming die and a second forming die, and a cooperation of a third forming die. A three-stage operation is required, namely, a second bending operation for forming an edgewise bent portion at the distal end portion, and a third operation for forming an edgewise bent portion at the most proximal end side of the lead wire portion by rotating the coil support member. Become. Therefore, in the conductive wire forming apparatus of Patent Document 1, since the drive mechanism of the second and third molding dies and the rotation mechanism of the coil supporting portion are provided, the apparatus configuration is complicated and the size is easily increased.

  On the other hand, as shown in FIGS. 16 to 18, in the wire forming apparatus 100 </ b> A including the first forming die 120 and the second forming die 140, the second forming die 140 is moved with respect to the first forming die 120 by an arrow. It is conceivable to form an edgewise bent portion and a flatwise bent portion on the lead wire portion 12 of the coil 10 simply by rotating in one direction indicated by R1.

  More specifically, the first forming die 120 of the wire forming apparatus 100A has a flatwise direction forming surface 122 having a substantially fan shape, and the flatwise direction forming surface 122 has a plurality of flatwise bent portions having different radial inclination angles. Including parts. Further, the first molding die 120 is provided with a columnar first projection 126a at a position corresponding to the most proximal end side of the lead wire portion 12 of the coil 10, and a circle is formed near the downstream end in the rotation direction R1. The columnar second protrusion 126b is arranged. Further, the first molding die 120 is provided with a cam mechanism 160 below the second protrusion 126b. The cam mechanism 160 includes a cam member 162 fixedly arranged on the wire forming apparatus 100A and a cam follower 164 rotatably supported by the first forming die 120 (see FIG. 18).

  On the other hand, the second molding die 140 of the wire molding device 100A is provided rotatably above the first molding die 120 along the arrow R1. The second molding die 140 has a molding surface 142 that is inclined so as to gradually swell downward toward the upstream side in the rotation direction R1 (that is, the direction opposite to the arrow R1). The molding surface 142 presses the lead wire portion 12 toward the downstream side in the rotation direction R1 and the first protrusion 146c and the second protrusion 146d each having a columnar shape for bending the lead wire portion 12 in the edgewise direction. A pressing member 148 is provided (see FIGS. 17 and 18).

  In the above-described lead forming apparatus 100A, as shown in FIG. 16 (a), the lead wire portion 12 extending in a straight line state is positioned between the first forming die 120 and the second forming die 140. The coil 10 is set. In this state, the long side surface of the lead wire portion 12 faces in the up-down direction. When the second molding die 140 is rotated in the direction of arrow R1 by a motor (not shown), as shown in FIG. 16B, the second molding die 140 comes into contact with the molding surface 142 of the second molding die 140 and is pressed downward to be flat. Can be bent in the width direction. Then, as shown in FIGS. 16C and 16D, when the second molding die 140 further rotates, the lead wire portion 12 is sandwiched between the molding surface 142 of the second molding die 140 and the first molding die 120. State. Thereby, the lead wire portion 12 is bent into a shape corresponding to the flatwise direction forming surface 122 of the first forming die 120, and a flatwise bent portion is formed.

  After the flat-width bent portion is formed in the lead wire portion 12 as described above, when the second molding die 140 further rotates in the direction of the arrow R1, as shown in FIG. The pressing member 148 is pressed downstream in the rotation direction. Thereby, the most proximal end side of the lead wire portion 12 is pressed by the first protrusion 126a of the first molding die 120 and is bent by about 90 degrees in the edgewise direction to form the first edgewise bent portion 14e1. Further, a portion on the tip end side of the lead wire portion 12 is pressed by the first projection 146c of the second molding die 140 and the second projection 126b of the first molding die 120, and is bent in the edgewise direction. As a result, the second edgewise bent portion 14e2 and the third edgewise bent portion 14e3 are formed at the distal end portion of the lead wire portion 12.

  Thereafter, the first mold 120 is slightly rotated in the direction of arrow R together with the second mold 140. At this time, as shown in FIGS. 18A and 18B, the cam follower 164 of the cam mechanism 160 rotatably provided on the first forming die 120 is attached to the cam member 162 fixedly arranged on the wire forming apparatus 100A. Upon contact, it rotates in the direction of arrow R2. As a result, the distal end portion 12a of the lead wire portion 12 is pressed by the second protrusion 146d of the second molding die 140 and pressed by the surface 164b of the cam follower 164, and is bent in the edgewise direction. As a result, the fourth edgewise bent portion 14e4 is formed at the tip 12a of the lead wire portion 12.

  As described above, in the wire forming apparatus 100A, all the flat wise bent portions and edge wise portions of the lead wire portion 12 of the coil 10 are simply driven by rotating the second forming die 140 in one direction with respect to the first forming die 120. The bent portion can be formed.

  However, in the conductive wire forming apparatus 100A, when first forming a flat-wise bent portion on the lead wire portion 12, the lead wire portion 12 is pushed downward by the forming surface 142 inclined with respect to the rotation direction R1, and at the same time, is rotated downstream in the rotation direction. Side also receives the pressing force. As a result, it is assumed that the base end of the lead wire portion 12 is gently bent in the edgewise direction, and it becomes difficult to form an edgewise bent portion having a desired shape on the lead wire portion 12.

  An object of the present invention is to provide a conductor forming apparatus capable of forming a bent portion having a desired shape on a conductor by simply rotating the first mold and the second mold in one direction.

The lead forming apparatus according to the present invention includes a first forming die for forming a bent portion having a predetermined shape with respect to a lead extending from a coil body, and the first forming for forming the lead while rotating about a rotation axis. And a second forming die for forming the bent portion in cooperation with the first forming die by pressing against the die, wherein the first forming die rotates the second forming die. When the conductor is pressed against the first molding die, the regulating wire has a regulating wall that regulates a proximal end portion of the conductor close to the coil body so as not to bend downstream in the rotation direction of the second molding die. The first molding die is configured such that a torque acting on the first molding die has a predetermined value as a base end portion of the conductive wire is pressed against the regulation wall toward the downstream side in the rotational direction by the second molding die. When it exceeds, it rotates with the second mold. Operate, thereby the proximal portion of the lead, by forming the base end side bent portion bent in the rotational direction downstream side, a first operation in which the wire is pressed against the first mold, the first The second operation is performed by rotating the second mold while the mold is stationary, and the second operation of forming the base-side bent portion at the base-side portion of the conductor is the first operation. This is realized by rotating both the first mold and the second mold in a state where the second mold is stationary with respect to the mold, and the operation from the first operation to the second operation is performed. The switching is performed by a torque limiter that allows rotation of the first molding die when the torque acting on the first molding die exceeds a predetermined value, or the second operation is performed from the first operation. Switching to the first gear, the second gear, and the second gear In a rotary / linear motion conversion mechanism having a slide member that moves relatively to a first gear, and an urging member that generates an urging force for preventing rotation of the first gear and the second gear, the first molding die When the applied torque exceeds a predetermined value, the operation is performed by rotating the first gear and the second gear by moving the slide member against the urging force of the urging member. It is.

  In the conductive wire forming apparatus according to the present invention, the control wall of the first forming die can prevent the base end portion of the conductive wire from flowing downstream of the second forming die in the rotation direction and bend. By rotating together with the second molding die, a bent portion bent by a desired angle can be formed at the base end side portion of the conductive wire on the downstream side in the rotational direction. Therefore, a bent portion having a desired shape can be surely formed on the conductive wire only by rotating the first forming die and the second forming die in one direction.

It is a perspective view of a coil. (A) is a diagram of the coil shown in FIG. 1 as viewed from a direction indicated by an arrow X, and (b) is a diagram of the coil 10 shown in FIG. 1 viewed from a direction indicated by an arrow Y. 1 is a front view of a wire forming apparatus according to a first embodiment. FIG. 4 is a perspective view showing a first molding die and a second molding die of the wire forming apparatus shown in FIG. 3. FIG. 5 is a perspective view showing a first mold shown in FIG. 4. FIG. 5 is a perspective view showing the second mold shown in FIG. 4 when viewed from below. It is a perspective view which shows the state of the lead wire part when a coil is set to a 1st shaping | molding die. It is a figure which shows a mode that a 2nd shaping | molding die rotates and a lead wire part is shape | molded by a 1st shaping | molding die. It is a figure which shows a mode that a 2nd shaping | molding die rotates further with a 1st shaping | molding die, and the base end side part of a lead wire part is bent in edgewise direction. FIG. 10 is a diagram illustrating a state in which the second mold rotates in the reverse direction from the state illustrated in FIG. 9 and the coil is removed from the first mold. It is a perspective view which shows the 1st shaping | molding die and 2nd shaping | molding die of the wire forming apparatus concerning 2nd Embodiment. FIG. 12 is a diagram illustrating a state where the second molding die rotates to form a bent portion in the lead wire portion in the wire forming apparatus illustrated in FIG. 11. FIG. 13 is a diagram showing a state in which the second molding die further rotates together with the first molding die from the state shown in FIG. 12, and a base end portion of the lead wire portion is bent in an edgewise direction. FIG. 14 is a diagram illustrating a state in which the second mold rotates in the reverse direction from the state illustrated in FIG. 13 and the coil is taken out. FIG. 14 is a diagram showing a state in which the first and second molding dies have been further rotated in the opposite directions from the state shown in FIG. 13 and have returned to the initial position. (A)-(b) is a figure which shows a mode that the conductor shaping | molding apparatus of a comparative example shape | molds a flatwise bent part in the lead wire part of a coil. FIG. 17 is a view showing a state where the wire forming apparatus of the comparative example shown in FIG. 16 sharpens an edgewise bent portion at a front end portion of a lead wire portion. FIG. 17 is a diagram showing a state in which a tip end of a lead wire portion is bent in an edgewise direction by a cam mechanism from the state shown in FIG. 16.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to uses, purposes, specifications, and the like. Further, when a plurality of embodiments and modified examples are included below, it is assumed from the beginning that these configurations are appropriately combined and used.

<First embodiment>
FIG. 1 and FIG. 2 are views showing a coil 10 in which a bent portion is formed in a lead wire portion (conductive wire) 12 by the conductive wire forming apparatus according to the present embodiment. FIG. 1 shows a perspective view of the coil 10. 2A shows a view of the coil 10 shown in FIG. 1 viewed from a direction indicated by an arrow X, and FIG. 2B shows a view of the coil 10 shown in FIG. FIG.

  The coil 10 has a coil body 11 and a lead wire portion 12. The coil main body 11 is formed of a winding, and is formed by winding a conductive wire a plurality of times. Here, the conducting wire is a rectangular wire having an end-shaped cross section having a long side length Wf and a short side length We (Wf> We). The lead wire portion 12 is a flat wire (conductive wire) extending from one end of the coil main body 11.

  The lead wire portion 12 has a first flatwise bent portion 14f1, a second flatwise bent portion 14f2, and a third flatwise bent portion 14f3 from the root portion 12b toward the distal end portion 12a. In addition, the lead wire portion 12 includes a first edgewise bent portion 14e1, a second edgewise bent portion 14e2, a third edgewise bent portion 14e3, and a fourth edgewise bent portion 14e4 from the root portion 12b toward the distal end portion 12a. Having. The lead wire portion 12 has a first inclined portion 13a between the first flatwise bent portion 14f1 and the second flatwise bent portion 14f2. The lead wire portion 12 has a second inclined portion 13b between the second flatwise bent portion 14f2 and the third flatwise bent portion 14f3. Further, the lead wire portion 12 has a third inclined portion 13c between the third flatwise bent portion 14f3 and the tip portion 12a.

  When the first flatwise bent portion 14f1, the second flatwise bent portion 14f2, and the third flatwise bent portion 14f3 are collectively referred to, they are referred to as a flatwise bent portion 14f. Similarly, the first edgewise bent portion 14e1, the second edgewise bent portion 14e2, the third edgewise bent portion 14e3, and the fourth edgewise bent portion 14e4 are referred to as an edgewise bent portion 14e.

  The flatwise bent portion 14f is a bent portion bent in a flatwise direction (a direction substantially orthogonal to the long side surface of the flat wire). The first edgewise bent portion 14e1, the second edgewise bent portion 14e2, and the third edgewise bent portion 14e3 are bent portions bent in an edgewise direction (a direction substantially orthogonal to the short side surface of the flat wire). The fourth edgewise bent portion 14e4 is a bent portion in which the vicinity of the distal end 12a of the lead wire portion 12 is bent in the edgewise direction. In the present embodiment, the edgewise direction is substantially perpendicular to the flatwise direction.

  The bending angle of the first edgewise bent portion 14e1 is about 90 degrees. That is, in the lead wire portion 12, when viewed from the root portion 12b, the proximal end portion 12c of the lead wire portion 12 is bent by about 90 degrees in the edgewise direction at the first edgewise bent portion 14e1. Here, the base end portion 12c of the lead wire portion 12 refers to a portion of the lead wire portion 12 on the side closer to the coil body 11. The bending angle of the fourth edgewise bent portion 14e4 is about 90 degrees. That is, the lead wire portion 12 is bent at about 90 degrees in the edgewise direction at the fourth edgewise bent portion 14e4 when viewed from the third edgewise bent portion 14e3. The bending angles of the other edgewise bent portions 14e and the flatwise bent portions 14f are smaller than 90 degrees.

  FIG. 3 is a front view of the wire forming apparatus 100 according to the present embodiment. The conductive wire forming apparatus 100 forms the flatwise bent portion 14f and the edgewise bent portion 14e described above on the lead wire portion 12 protruding from the coil 10. That is, the wire forming apparatus 100 is an apparatus that performs bending on the lead wire portion 12.

  The conductive wire forming apparatus 100 includes a first forming die 120 and a second forming die 140. Further, the wire forming apparatus 100 includes a base plate 101, an intermediate support plate 103 supported by a plurality of columns 102 erected on the base plate 101, and a plurality of columns 104 erected on the intermediate support plate 103. And a driving device 106 such as a motor disposed on the upper support plate 105.

  The first mold 120 is rotatably mounted on the intermediate support plate 103. The upper end of the driven shaft 107 rotatably supported by the base plate 101 and the intermediate support plate 103 is connected to the first mold 120. Thus, the first mold 120 can rotate around the driven shaft 107. The driven shaft 107 is provided with a torque limiter 109. The torque limiter 109 is fixed to a torque limiter support plate 110 supported by the column 102. The torque limiter 109 allows the driven shaft 107 and the first molding die 120 to rotate in the direction of the arrow R1 when the torque acting on the driven shaft 107 via the first molding die 120 exceeds a predetermined value (for example, 1500 N). I do. As the torque limiter 109, any known structure such as a friction plate lamination method may be used.

  The second forming die 140 is rotatably installed at a position above the first forming die 120 in the wire forming apparatus 100. The lower end of a drive shaft 112 that outputs rotational power from the drive device 106 is connected. Thus, when the driving shaft 112 is driven to rotate in the direction of the arrow R1 by the driving device 106, the second molding die 140 is configured to rotate about the driving shaft 112 in the same direction R1.

  FIG. 4 is a perspective view showing the first forming die 120 and the second forming die 140 of the wire forming apparatus 100 shown in FIG. The wire forming apparatus 100 includes a mounting table 113 on which the coil 10 is mounted. A plurality of fixing portions 114 (only one is shown in FIG. 4) protrude from a peripheral portion of the upper surface of the mounting table 113. By these fixing portions 114, the coil main body 11 of the coil 10 mounted on the mounting table 113 is fixed so as not to move in a horizontal plane. As shown in FIG. 4, the coil 10 set on the mounting table 113 has the lead wire portion 12 linearly extending from the coil body 11 before the lead wire portion 12 is bent. It has a shaped shape.

  Further, the first molding die 120 is integrally provided with a return operation drive unit 130. The return operation drive unit 130 has a side surface 132 facing the second mold 140. As will be described later, when the second mold 140 rotates in the reverse direction after the first mold 120 rotates in the direction of the arrow R1 together with the second mold 140, the side surface 132 of the return operation drive unit 130 is moved to the second mold. Contact 140. Thereby, the first mold 120 rotates in the reverse direction and returns to the initial position.

  In the present embodiment, an example in which the return operation of the first molding die 120 is driven by the second molding die 140 has been described. However, the present invention is not limited to this. For example, another return unit such as a spring may be used. The first mold 120 may be returned. Further, the return operation drive unit 130 may be formed as a separate member from the first molding die 120, and may be connected to the first molding die 120 using a means such as a screw.

  As will be described later, when the second molding die 140 rotates in the direction indicated by the arrow R1 with respect to the first molding die 120 at the fixed position, the first molding die 120 and the second molding die 140 cooperate. Then, a flatwise bent portion 14f is formed on the lead wire portion 12, and a second edgewise bent portion 14e2 and a third edgewise bent portion 14e3 are formed on the lead wire portion 12. Further, the second mold 140 is further rotated in the direction indicated by the arrow R1 together with the first mold 120, so that the first mold 120 and the second mold 140 cooperate to form the first edgewise bent portion. 14 e 1 and the fourth edgewise bent portion 14 e 4 are formed in the lead wire portion 12.

  FIG. 5 is a perspective view showing the first molding die 120 shown in FIG. In FIG. 4, the mounting table 113 and the second mold 140 are not shown. As shown in FIG. 5, the first mold 120 has a central shaft portion 125. The central shaft portion 125 is connected to the driven shaft 107 (see FIG. 3). Accordingly, the first molding die 120 is rotatable about the central shaft 125.

  The first molding die 120 includes a pedestal part 127 and a first molding part 121 having a substantially trapezoidal side surface from the pedestal part 127 and projecting upward in FIG. In the present embodiment, the first forming portion 121 is formed integrally with the central shaft portion 125. The first forming portion 121 has a flatwise direction forming surface 122. The flatwise direction forming surface 122 is formed in a shape corresponding to the shape of the lead wire portion 12 where the flatwise bent portion 14f is formed. Specifically, the flatwise direction forming surface 122 has a flat surface 122a that extends elongated in a direction substantially perpendicular to the rotation direction R1. The flat surface 122a corresponds to a lead wire portion extending linearly between the first edgewise bent portion 14e1 and the first flatwise bent portion 14f1 in the lead wire portion 12.

  Further, the flatwise direction forming surface 122 has a first inclined surface 124a, a second inclined surface 124b, and a third inclined surface 124c continuous with the flat surface. Then, in the flatwise direction forming surface 122, a first flatwise bent forming portion 122f1 is formed between the flat surface 122a and the first inclined surface 124a, and between the first inclined surface 124a and the second inclined surface 124b. A second flat wise bent portion 122f2 is formed, and a third flat wise bent portion 122f3 is formed between the second inclined surface 124b and the third inclined surface 124c.

  The first inclined surface 124a of the flatwise direction forming surface 122 is formed at an inclination angle corresponding to the inclination angle of the first inclined portion 13a of the lead wire portion 12. The second inclined surface 124b is formed at an inclination angle corresponding to the inclination angle of the second inclined portion 13b of the lead wire portion 12. Further, the third inclined surface 124c is formed at an inclination angle corresponding to the inclination angle of the third inclined portion 13c of the lead wire portion 12. Thereby, as described later, the lead wire portion 12 extending linearly from the coil body 11 is pressed against the flatwise direction molding surface 122 of the first molding die 120 by the molding surface of the rotating second molding die 140 as described later. Accordingly, in the lead wire portion 12, the lead wires corresponding to the first flatwise bent portion 14f1, the first inclined portion 13a, the second flatwise bent portion 14f2, the second inclined portion 13b, and the third flatwise bent portion 14f3, respectively. The part is molded.

  In addition, as shown in FIG. 5, the first forming portion 121 has an edgewise direction forming surface 128 substantially perpendicular to the flatwise direction forming surface 122. The edgewise forming surface 128 forms a second edgewise bent portion 14e2 and a third edgewise bent portion 14e3 on the lead wire portion 12 in cooperation with the pressing surface of the second mold. Further, when the flatwise bent portion 14f is formed, the edgewise direction forming surface 128 comes into contact with the forming surface of the rotating second forming die 140 so that the lead wire portion 12 flows downstream in the rotation direction R1. It functions as a restricting wall that restricts deformation due to being deformed.

  Specifically, the edgewise direction forming surface 128 has a first wall surface 128a formed corresponding to the flat surface 122a of the flatwise direction forming surface 122 and a second wall surface formed corresponding to the first inclined surface 124a. It includes a wall surface 128b and a third wall surface 128c formed corresponding to the second inclined surface 124b. The first to third wall surfaces 128a, 128b, 128c extend downward in a radial direction passing through the center of rotation of the central shaft portion 125 (that is, a direction orthogonal to the rotation direction R1).

  The edgewise direction forming surface 128 includes a fourth wall surface 128d and a fifth wall surface 128e that are continuous with the third wall surface 128c. The fourth wall surface 128d is inclined downstream in the rotation direction with respect to the radial direction, and a first edgewise bent portion 129a is formed between the third wall surface 128c and the fourth wall surface 128d. The inclination angle of the fourth wall surface 128d with respect to the third wall surface 128c (that is, the angle of the first edgewise bent portion 129a) corresponds to the bending angle of the second edgewise bent portion of the lead wire portion 12 in the edgewise direction. The fifth wall surface 128e is formed along the radial direction, and a second edgewise bent portion 129b is formed between the fourth wall surface 128d and the fifth wall surface 128e. The inclination angle of the fifth wall surface 128e with respect to the fourth wall surface 128d (that is, the angle of the second edgewise bent portion 129b) corresponds to the angle of the third edgewise bent portion 14e3 of the lead wire portion 12 in the edgewise direction.

  The lead wire portion 12 is pressed in the edgewise direction by the pressing member of the rotating second forming die 140 against the third to fifth wall surfaces 128c, 128d, 128e of the edgewise direction forming surface 128 thus formed. . Thereby, the lead wire portions corresponding to the second edgewise bent portion 14e2 and the third edgewise bent portion 14e3 are formed respectively.

  The first forming portion 121 of the first forming die 120 is provided with a cam follower 164 constituting the cam mechanism 160. The cam follower 164 is attached to the first forming portion 121 so as to be rotatable about a rotation shaft 164a. The cam follower 164 has a surface 164b for bending the distal end portion 12a of the lead wire portion 12 in the edgewise direction. The cam follower 164 is disposed such that its surface 164b is aligned with the fifth wall surface 128e of the edgewise direction forming surface 128. The cam follower 164 rotates in the direction of arrow R <b> 2 by contacting a fixed cam member (not shown) to form a fourth edgewise bent portion 14 e 4 near the distal end portion 12 a of the lead wire portion 12. The cam member not shown can be configured similarly to the conductive wire forming apparatus 100A of the comparative example described with reference to FIGS.

  FIG. 6 is a perspective view showing the second molding die 140 shown in FIG. 4 when viewed from below. As described above, the second molding die 140 is rotated by the driving device 106 about the driving shaft 112 in the direction indicated by the arrow R1.

  The second mold 140 has a second molding surface 142. The second molding surface 142 is generally formed in a substantially sector shape with the drive shaft 112 as a center. Further, the second forming surface 142 has a first flatwise bent forming portion 142f1, a second flatwise bent formed portion 142f2, and a third flatwise bent formed portion 142f3. The second forming surface 142 has a first inclined surface 144a between the first flatwise bent forming portion 142f1 and the second flatwise bent formed portion 142f2. The second forming surface 142 has a second inclined surface 144b between the second flatwise bent forming portion 142f2 and the third flatwise bent formed portion 142f3. The second forming surface 142 has a third inclined surface 144c between the third flatwise bent forming portion 142f3 and the radial end 142c.

  The first inclined surface 144a is formed at an inclination angle corresponding to the inclination angle of the first inclined portion 13a in the lead wire portion 12. Further, the second inclined surface 144b is formed at an inclination angle corresponding to the inclination angle of the second inclined portion 13b in the lead wire portion 12. Further, the third inclined surface 144c is formed at an inclination angle corresponding to the inclination angle of the third inclined portion 13c in the lead wire portion 12.

  The first flatwise bent portion 142f1 has a shape corresponding to the shape of the surface of the first flatwise bent portion 14f1 as viewed from above in FIG. 2A (the direction opposite to the direction indicated by the arrow Y in FIG. 1). Is formed. The second flatwise bent portion 142f2 has a shape corresponding to the shape of the surface of the second flatwise bent portion 14f2 as viewed from above in FIG. 2A (the direction opposite to the direction indicated by the arrow Y in FIG. 1). Is formed. The third flatwise bent portion 142f3 has a shape corresponding to the shape of the surface of the third flatwise bent portion 14f3 as viewed from above in FIG. 2A (the direction opposite to the direction indicated by the arrow Y in FIG. 1). Is formed.

  Thereby, the first flatwise bent portion 142f1 cooperates with the first forming die 120 to form the first flatwise bent portion 14f1 on the lead wire portion 12. In addition, the second flatwise bent forming portion 142f2 forms the second flatwise bent portion 14f2 on the lead wire portion 12 in cooperation with the first forming die 120. In addition, the third flatwise bent forming portion 142f3 forms the third flatwise bent portion 14f3 on the lead wire portion 12 in cooperation with the first forming die 120. Here, at the time of forming the flatwise bent portion 14f, the second forming die 140 rotates around the drive shaft 112 in the direction indicated by the arrow R1. Accordingly, when viewed from the second molding die 140, the lead wire portion 12 slides in contact with the second molding surface 142, and moves from the end 142a on the downstream side (the destination in the rotation direction) in the rotation direction indicated by the arrow R1 to the arrow. It moves in the direction of the end 142b on the upstream side of the rotation direction indicated by R1 (the side opposite to the destination in the rotation direction).

  The second molding surface 142 has a gradually changing region 142A and a molding region 142B. The gradually changing region 142A is a region on the side of the end 142a, and the forming region 142B is a region on the side of the end 142b. The gradual change region 142A and the forming region 142B are separated by a boundary portion 142d as a boundary.

  Here, the first flatwise bent-formed part 142f1, the second flatwise bent-formed part 142f2, and the third flatwise bent-formed part 142f3, and the first inclined surface 144a, the second inclined surface 144b, and the third inclined surface 144c are It is formed in the molding area 142B. On the other hand, the shape of the gradually changing region 142A corresponding to the shape of the lead wire portion 12 before molding (that is, a straight shape without bending) is formed near the end portion 142a. On the other hand, in the gradually changing region 142A, a shape corresponding to the shape in which the flatwise bent portion 14f is formed in the lead wire portion 12 is formed at the boundary portion 142d as described above. The gradually changing region 142A has a shape that gradually changes from the end 142a to the boundary 142d in the circumferential direction around the drive shaft 112 (the direction opposite to the direction indicated by the arrow R1). .

  That is, on the second molding surface 142, in the circumferential direction around the drive shaft 112, from the vicinity of the end 142 a where the shape corresponding to the shape before molding of the lead wire portion 12 is formed, A shape that gradually changes is formed up to a forming region 142B where a shape corresponding to the shape of the flatwise bent portion 14f is formed. In other words, the second molding die 140 corresponds to the shape of the flat wire bent portion 14f of the lead wire portion 12 from the shape corresponding to the shape before the molding of the lead wire portion 12 in the circumferential direction around the drive shaft 112. It has a gradually changing region 142A that gradually changes to the shape. Therefore, the gradually changing region 142A of the second molding surface 142 is generally formed so as to gradually rise downward in the axial direction of the drive shaft 112 from the end 142a to the boundary 142d.

  Specifically, the gradually changing region 142A has a first flatwise bent gradually changed portion 145f1, a second flatwise bent gradually changed portion 145f2, and a third flatwise bent gradually changed portion 145f3. The gradually changing region 142A has a first inclined surface gradually changing portion 145a between the first flatwise bent gradually changing portion 145f1 and the second flatwise bent gradually changing portion 145f2. The gradually changing region 142A includes a second inclined surface gradually changing portion 145b between the second flatwise bending gradually changing portion 145f2 and the third flatwise bending gradually changing portion 145f3. The gradually changing region 142A has a third inclined surface gradually changing portion 145c between the third flatwise bent gradually changing portion 145f3 and the end 142c.

  The first flatwise bent gradually changing portion 145f1 is formed with a curved surface that smoothly changes from the end 142a to a position corresponding to the first flatwise bent formed portion 142f1 of the boundary 142d. The first inclined surface gradually changing portion 145a is formed of a curved surface that smoothly changes from the end 142a to a position corresponding to the first inclined surface 144a of the boundary 142d. The second flatwise bent formed portion 142f2 is formed with a curved surface that smoothly changes from the end 142a to a position corresponding to the second flatwise bent formed portion 142f2 of the boundary 142d. The second inclined surface gradually changing portion 145b is formed of a curved surface that smoothly changes from the end 142a to a position corresponding to the second inclined surface 144b of the boundary 142d. The third flatwise bent gradually changing portion 145f3 is formed with a curved surface that smoothly changes from the end 142a to a position corresponding to the third flatwise bent formed portion 142f3 of the boundary 142d. The third inclined surface gradually changing portion 145c is formed as a curved surface that smoothly changes from the end 142a to a position corresponding to the third inclined surface 144c of the boundary 142d.

  Next, with reference to FIG. 4 and FIGS. 7 to 10, a procedure in which the lead wire forming apparatus 100 forms the flat wise bent portion 14 f and the edge wise bent portion 14 e on the lead wire portion 12 will be described.

  FIG. 7 is a perspective view showing a state of the lead wire portion 12 when the coil is set in the first molding die 120. FIG. 8 is a view showing a state in which the second molding die 140 rotates and the bent portion of the lead wire portion 12 is molded by the first molding die 120. FIG. 9 is a view showing a state in which the second molding die 140 is further rotated together with the first molding die 120, and the base end portion 12c of the lead wire portion 12 is bent in the edgewise direction. FIG. 10 is a diagram illustrating a state where the second mold 140 rotates in the reverse direction from the state illustrated in FIG. 9 and the coil 10 is removed from the first mold 120. 8 to 10, the second mold 140 is drawn by a broken line indicating a see-through state.

  First, as shown in FIGS. 4 and 7, the coil body 11 of the coil 10 is placed in a state where it is fixed on the placing table 113 of the wire forming apparatus 100. At this time, the lead wire portion 12 extending linearly from the coil main body 11 is in a state in which the long side surface faces up and down. At this time, the lower end side of the base portion of the lead wire portion 12 is placed on the flat surface 122a constituting the flatwise direction forming surface 122 of the first molding die 120, and the shorter side surface Are in contact with or close to the first wall surface 128a of the edgewise direction forming surface 128.

  In this state, the driving device 106 operates to rotate the second mold 140 in the direction of the arrow R1. Then, the lead wire portion 12 is pressed downward by sliding contact with the gradually changing region 142A of the second molding surface 142 of the second molding die 140. As a result, first, the lead wire portion 12 is pressed against the first flatwise bent forming portion 122f1 and the first inclined surface 124a in the flatwise direction forming surface 122 of the first forming die 120. Thereby, the first flatwise bent portion 14f1 and the first inclined portion 13a are formed in the lead wire portion 12. At this time, a force in a direction of bending to the downstream side in the rotation direction acts on the base end portion 12c of the lead wire portion 12 by sliding contact with the rotating second molding die 140. However, in the wire forming apparatus 100 of the present embodiment, the short side surface on the downstream side in the rotational direction of the base end portion 12c of the lead wire portion 12 is in contact with the first wall surface 128a of the edgewise direction forming surface 128. So that it does not bend downstream in the rotation direction. Therefore, the first flatwise bent portion 14f1 and the first inclined portion 13a can be formed in the lead wire portion 12 while maintaining the proximal end portion 12c of the lead wire portion 12 in a straight line.

  When the second molding die 140 further rotates in the direction of the arrow R1, the lead wire portion 12 is further pressed downward by sliding contact with the gradually changing region 142A of the second molding surface 142 of the second molding die 140, so that the first molding die 140 is pressed. It is pressed against the second flatwise bent forming portion 122f2 and the second inclined surface 124b of the flatwise forming surface 122 of the forming die 120. Thereby, the second flatwise bent portion 14f2 and the second inclined portion 13b are formed in the lead wire portion 12. Also at this time, the lead wire portion 12 is in a state where the short side surface on the downstream side in the rotation direction is in contact with the second wall surface 128b and the third wall surface 128c of the edgewise direction forming surface 128 of the first forming die 120, and It is regulated not to bend downstream. Therefore, the second flatwise bent portion 14f2 and the second inclined portion 13b can be formed in the lead wire portion 12 while the base end portion 12c of the lead wire portion 12 is maintained linear.

  When the second molding die 140 is further rotated in the direction of the arrow R1, the lead wire portion 12 is moved by the pressing surface 148a of the pressing member 148 of the second molding die 140 to the first edgewise bent molding portion 129a of the first molding die 120 It is pressed against the four wall surfaces 128d and bent in the edgewise direction. Thereby, the second edgewise bent portion 14e2 is formed in the lead wire portion 12. Then, the lead wire portion 12 is pressed by the pressing surface 148a of the pressing member 148 of the second molding die 140 against the second edgewise bent molding portion 129b and the fifth wall surface 128e of the first molding die 120, and the third edgewise. The bent portion 14e3 is formed in the lead wire portion 12. At this time, the lead wire portion 12 is moved in the flatwise direction of the first molding die 120 by the third flatwise bent molding portion 142f on the second molding surface 142 of the second molding die 140 and the third inclined surface (see FIG. 6). It is pressed against the third flatwise bent forming portion 122f3 and the third inclined surface 124c on the forming surface 122. Thereby, the third flatwise bent portion 14f3 and the third inclined portion 13c are formed.

  In this way, as shown in FIG. 8, the second edge 140 is rotated in the direction of arrow R <b> 1 with the first edge 120 in the fixed position, so that the first edgewise bending is performed. Except for the portion 14e1 and the fourth edgewise bent portion 14e4, all the flatwise bent portions 14f1, 14f2, 14f3 and the edgewise bent portions 14e2, 14e3 are formed.

  In the state shown in FIG. 8, since the lead wire portion 12 is sandwiched between the pressing surface 148 a of the second molding die 140 and the edgewise molding surface 128 of the first molding die 120, the driving device The torque by 106 acts on the first mold 120 via the second mold 140. When the torque exceeds a predetermined value, the rotation stop of the driven shaft 107 by the torque limiter 109 is released. Thereby, as shown in FIG. 9, the first mold 120 rotates in the direction of the arrow R1 together with the second mold 140. In the present embodiment, the first molding die 120 rotates by about 90 degrees corresponding to the bending angle of the first edgewise bent portion 14e1 of the lead wire portion 12. As a result, the lead wire portion 12 bends in the edgewise direction by about 90 degrees near the root portion 12b, and the first edgewise bent portion 14e1 is formed.

  Further, when the first molding die 120 rotates in this way, the cam follower 164 of the cam mechanism 160 rotates in the direction of the arrow R2 by a fixed cam member (not shown), so that the distal end portion 12a of the lead wire portion 12 is rotated by about 90 degrees. It is bent in the edgewise direction. Thereby, the fourth edgewise bent portion 14e4 is formed in the lead wire portion 12.

  After all the bent portions with respect to the lead wire portion 12 have been formed in this way, as shown in FIG. 10, the second molding die 140 is rotated by the driving device 106 in the reverse direction indicated by the arrow R3. When the second mold 140 is retracted from above the first mold 120 at a position rotated by about 90 degrees in the direction of the arrow R from the initial position, the second mold 140 moves upward from the first mold 120 as indicated by the arrow A. The coil 10 can be taken out.

  After that, the second molding die 140 is rotated by the driving device 106 in the direction of the arrow R3 to the initial position. At this time, the side surface 132 of the return operation drive unit 130 of the first molding die 120 contacts the side surface of the second molding die 140. As a result, the first molding die 120 returns and rotates against the rotation stopping force of the torque limiter 109, and returns to the initial position shown in FIGS.

  As described above, according to the conductive wire forming apparatus 100 of the present embodiment, all the bent portions can be formed only by rotating the second forming die 140 (and the first forming die 120) in one direction. Therefore, since only the rotation space of the second molding die 140 needs to be secured, the lead molding device 100 is operated in a plurality of times by bending the lead wire portion 12 a plurality of times. The increase in scale can be suppressed, and the time required for forming the bent portion can be reduced.

  Further, according to the wire forming apparatus 100 of the present embodiment, the base end portion 12 c of the lead wire portion 12 is rotated by the first wall surface 128 a of the edgewise direction forming surface 128 of the first forming die 120. The first molding die 120 rotates together with the second molding die 140 so that the first molding die 120 rotates about 90 degrees to the proximal end portion 12c of the lead wire portion 12 in the rotation direction downstream. The first edgewise bent portion 14e1 bent only by degrees can be formed. Therefore, a bent portion having a desired shape can be reliably formed on the base end portion 12c of the lead wire portion 12 only by rotating the first forming die 120 and the second forming die 140 in one direction.

<Second embodiment>
Next, with reference to FIGS. 11 to 15, a description will be given of another embodiment of the conductive wire forming apparatus 200. FIG. 11 is a perspective view showing a first forming die 120 and a second forming die 140 of the wire forming apparatus 200 according to the second embodiment. FIG. 12 is a diagram showing a state where the second molding die 140 is rotated to form a bent portion in the lead wire portion 12 in the wire molding apparatus 200 shown in FIG. FIG. 13 is a view showing a state in which the second molding die 140 is further rotated together with the first molding die 120 from the state shown in FIG. 12, and the base end portion of the lead wire portion 12 is bent in the edgewise direction. . FIG. 14 is a diagram illustrating a state in which the second mold 140 rotates in the reverse direction from the state illustrated in FIG. 13 and the coil 10 is taken out. FIG. 15 is a diagram illustrating a state where the first mold 120 and the second mold 140 have been further rotated in the opposite directions from the state illustrated in FIG. 13 and have returned to the initial position. The first forming die 120 and the second forming die 140 in the wire forming apparatus 200 of the present embodiment are the same as those described in the above-described wire forming apparatus 100, and therefore, the differences will be mainly described below. The same components as those of the embodiment are denoted by the same reference numerals, and redundant description will be omitted.

  As shown in FIG. 11, the conductive wire forming apparatus 200 of the present embodiment includes a first forming die 120 and a second forming die 140. Further, the wire forming apparatus 200 further includes a mounting table 113 for setting the coil 10 before the lead wire portion 12 is bent, but is not illustrated in FIG. 11. Further, the wire forming device 200 does not include the torque limiter 109 in the above-described wire forming device 100, but includes a rotation / linear motion conversion mechanism 201 instead.

  The rotation / linear motion conversion mechanism 201 includes a first gear 202 and a second gear 204 that mesh with each other. The first gear 202 is integrally provided at an axially intermediate portion of the driven shaft 107 whose upper end is connected to the first molding die 120. Thus, the first gear 202 is configured to rotate together with the driven shaft 107 and the first molding die 120.

  The second gear 204 meshing with the first gear 202 has, for example, three times the number of teeth of the first gear 202. That is, when the first gear rotates by 90 degrees, the second gear 204 rotates by one third, that is, 30 degrees. The upper end and the lower end of the rotation shaft 206 of the second gear 204 are rotatably supported by a fixing member (not shown) of the wire forming device 200.

  A cylindrical projection 208 is provided on the lower surface of the second gear 204 so as to protrude downward. The projection 208 is arranged at a position closer to the outer peripheral surface in the radial direction of the second gear 204. The projection 208 is movably fitted in the groove 212 of the slide member 210 along the direction of arrow B.

  The slide member 210 is movable in the direction of arrow C while being guided by the rail member 214 extending linearly. In the present embodiment, the moving direction (arrow C) of the slide member 210 is set in a direction parallel to a straight line connecting the rotation center of the first gear 202 and the rotation center of the second gear 204. However, the moving direction of the slide member 210 is not limited to the above, and may be any direction as long as the rotational movement of the second gear 204 can be converted into the linear mobility of the slide member 210.

  The rail member 214 is connected and fixed to the fixing member 216. The fixing member 216 is provided with an urging member 218. The biasing member 218 can be constituted by, for example, a spring or the like. The urging member 218 urges the side surface of the slide member 210.

  In the above description, the slide member 210, the rail member 214, and the urging member 218 also constitute a part of the rotation / linear motion conversion mechanism 201.

  Next, the operation of the wire forming apparatus 200 including the rotation / linear motion conversion mechanism 201 having the above configuration will be described.

  From the state in which the coil 10 is set on the mounting table 113 as shown in FIG. 11, the second mold 140 rotates in the direction of the arrow R1 as shown in FIG. The second molding die 140 is rotationally driven by the driving device 106 (see FIG. 3). Thereby, similarly to the case of the above-described wire forming apparatus 100, the lead wire portion 12 of the coil 10 has flat wise bent portions 14f other than the first edge wise bent portion 14e1 and the fourth edge wise bent portion 14e4, the second bent portion 14f, and the second bent portion. The third edgewise bent portions 14e2, 14e3 and the first to third inclined portions 13a, 13b, 13c are formed. At this time, the first molding die 120 does not rotate because the rotation of the first and second gears 202 and 204 is prevented by the urging force of the urging member 218 of the rotation / linear motion conversion mechanism 210.

  Subsequently, as shown in FIG. 13, when the second molding die 140 is further rotated in the direction of the arrow R1 by the driving device 106, the torque acting from the second molding die 140 via the lead wire portion 12 becomes a predetermined value (for example, 1500 N). ), The slide member 210 moves against the urging force of the urging member 218, so that the first and second gears 202 and 204 can rotate. As a result, the second mold 140 is further rotated by about 90 degrees together with the first mold 120, and the vicinity of the root 12b of the lead wire portion 12 is bent by about 90 degrees in the edgewise direction, so that the first edgewise bent portion is formed. 14 e 1 is formed into the lead wire portion 12. At this time, a fourth edgewise bent portion 14e4 is formed near the distal end portion 12a of the lead wire portion 12 by a cam mechanism (not shown).

  As described above, when the second mold 140 rotates about 90 degrees, the first gear 202 rotates about 90 degrees in the direction of the arrow R1 together with the driven shaft 107. Accordingly, the second gear 204 meshing with the first gear 202 rotates about 30 degrees in the direction of arrow R3. When the second gear 204 rotates in this manner, the protrusion 208 projecting from the lower surface of the second gear 204 presses the inner wall surface of the groove 212 of the slide member 210 in the direction of arrow C1 while moving the inside of the groove 212 in the direction of arrow B1. Moving. Accordingly, the slide member 210 moves in the direction of the arrow C1 along the rail member 214 against the urging force of the urging member 218. Then, the slide member 210 is held by a stopper member (not shown) in a state where the first molding die 120 rotates about 90 degrees and moves along the rail member 214 to a position where the molding of the lead wire portion 12 is completed.

  Subsequently, as shown in FIG. 14, the second molding die 140 is returned to the initial position in the direction of arrow R3 and rotated by the driving of the driving device 106. At this time, since the slide member 210 is held at a predetermined position by a stopper member (not shown), the second gear 204 cannot rotate. Therefore, the first gear 202 and the driven shaft 107 cannot rotate, and the first molding die 120 remains at the same position. As a result, since the upper portion of the first molding die 140 is opened by the return rotation of the second molding die 140, the coil 10 in which each bent portion is molded in the lead wire portion 12 can be taken out in the direction of arrow A. .

  After the coil 10 is taken out in this way, the restriction on the movement of the slide member 210 by the stopper member is released. Accordingly, the slide member 210 moves in the direction of the arrow C2 by the urging force of the urging member 218. As a result, the projection 208 moves in the direction of the arrow B2 in the groove 212, so that the second gear 204 rotates in the direction of the arrow R1 and the first gear 202 rotates in the direction of the arrow R3. As a result, the first mold 120 returns to the initial position, which is the same position as in FIG. 15, and rotates, and the preparation for forming the lead wire portion of the next coil is completed.

  As described above, the same effects as those of the wire forming device 100 according to the first embodiment can also be obtained by the wire forming device 200 according to the present embodiment.

  It should be noted that the present invention is not limited to the above-described embodiment and its modified examples, and that various changes and improvements can be made within the matters described in the claims of the present application and equivalent scope thereof. Needless to say.

  DESCRIPTION OF SYMBOLS 10 Coil, 11 coil main body, 12 lead wire part, 12a tip part, 12b root part, 12c base end part, 13a-13b inclined part, 14e edgewise bent part, 14f flatwise bent part, 100, 100A, 200 lead Forming device, 101 base plate, 102, 104 support, 103 intermediate support plate, 105 upper support plate, 106 drive device, 107 driven shaft, 109 torque limiter, 110 torque limiter support plate, 112 drive shaft, 113 mounting table, 114 fixed Part, 120 first molding die, 121 first molding part, 122 flatwise direction molding surface, 122a flat surface, 122f flatwise bent molding part, 124a, 124b, 124c inclined surface, 125 central axis part, 126a, 126b projection, 127 pedestal, 128 edgewise Forming surface, 128a, 128b, 128c, 128d, 128e wall surface, 129a, 129b edgewise bent forming portion, 130 return operation driving portion, 132 side surface, 140 second forming die, 142 second forming surface or forming surface, 142A Variable area, 142a, 142c end, 142B forming area, 142d boundary, 142f flatwise bent formed part, 144a, 144b, 14c sloped surface, 145a, 145b, 145c sloped surface gradually changed part, 145f flatwise bent gradually changed part 148 pressing member, 148a pressing surface, 160 cam mechanism, 162 cam member, 164 cam follower, 164a rotating shaft, 164b surface, 201 rotation / linear motion conversion mechanism, 202 first gear, 204 second gear, 206 rotating shaft, 208 projection , 210 slide member, 212 , 214 rail member, 216 fixing member, 218 the biasing member.

Claims (1)

A first forming die for forming a bent portion having a predetermined shape with respect to a conductive wire extending from the coil main body; and pressing the conductive wire against the first forming die while rotating around a rotation axis. A second forming die for forming the bent portion in cooperation with a die, and a lead forming device,
The first molding die is such that when the conductive wire is pressed against the first molding die by the rotating second molding die, a proximal end portion of the conductive wire close to the coil body is located downstream of the second molding die in the rotation direction. Has a regulating wall that regulates not to bend to the side,
The first molding die is configured such that a torque acting on the first molding die has a predetermined value as a base end portion of the conductive wire is pressed against the regulation wall toward the downstream side in the rotational direction by the second molding die. and rotation with said second mold when it exceeds, thereby the proximal portion of the lead, by forming the base end side bent portion bent in the downstream side in the rotational direction,
The first operation in which the conductive wire is pressed against the first mold is realized by rotating the second mold while the first mold is stationary,
Furthermore, the second operation of forming the base-end bent portion at the base end portion of the conductive wire is performed in a state where the second forming die is stationary with respect to the first forming die. It is realized by rotating both of the second molds,
The switching from the first operation to the second operation is performed by a torque limiter that allows the rotation of the first molding die when a torque acting on the first molding die exceeds a predetermined value,
Alternatively, the switching from the first operation to the second operation includes a first gear, a second gear, a slide member for relatively moving the second gear with respect to the first gear, and the first gear and the second gear. In a rotary / linear motion converting mechanism having an urging member for generating an urging force for preventing rotation of the two gears, when the torque acting on the first molding die exceeds a predetermined value, the urging force of the urging member is adjusted. A wire forming apparatus, which is executed by rotating the first gear and the second gear by moving the slide member against movement of the wire.

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