JP6471662B2 - Wire rod holding device - Google Patents

Description

  The present invention relates to a wire rod holding device used when holding one end of a wire rod, for example, when bending a wire rod such as a copper wire used in an alternator.

  Conventionally, a wire holding device as described in Patent Document 1 is known. The wire rod holding device described in Patent Document 1 is a device for holding an end portion of a wire rod when the wire rod is wound to form an air core coil by rotating.

  By the way, in an alternator that converts part of the motive energy of the engine into electric energy and supplies electric power to various electric components of the battery and the vehicle, the copper wire wound around the stator inside the alternator is sequentially bent at various angles. To a predetermined shape. When bending such a copper wire, one end of the copper wire must be firmly held. Conventionally, the copper wire is held by a known chuck cylinder so as not to come off.

JP 9-320881 A

  However, such a chuck cylinder has a problem that it is difficult to obtain a sufficient clamping force, and the copper wire is slippery and easily pulled out at the insertion portion. Further, in order to obtain a sufficient clamping force, the chuck cylinder itself becomes large, and there is a problem that the entire processing apparatus is enlarged.

  The present invention has been created in view of such a point, and an object thereof is to provide a wire holding device capable of obtaining a sufficient clamping force with a simple configuration.

  The wire holding device (101, 102) of the present invention includes a fixed shaft (20), a rotating ring (30), a rotating mechanism (50), a cam groove (31), and a pressing member (40, 400). ).

  The fixed shaft has an insertion hole (21) into which the wire (10) is inserted, and a notch groove (22) cut out radially outward from the insertion hole. The rotation ring is provided on the outer periphery of the fixed shaft so as to be rotatable relative to the fixed shaft. The rotation mechanism unit rotates the rotation ring relative to the fixed shaft.

The cam groove portion is provided so as to extend in the circumferential direction and the axial direction of the rotating ring, and the distance from the rotating shaft (L) of the rotating ring gradually decreases from one to the other in the circumferential direction. The pressing member is in point contact with the inner wall of the cam groove portion and is reciprocally movable in the circumferential direction of the cam groove portion, and extends from the engagement portion to the inner side of the notch groove and extends to the inner wall of the insertion hole. It has a base material part (41) which can press. The rotation mechanism unit includes a fixed block (51) fixed to the fixed shaft, a movable block (52) fixed to the rotation ring, one end fixed to the fixed block, and the other end fixed to the movable block. Springs (53, 54).

  According to this configuration, the pressing member moves in the cam groove portion as the rotating ring rotates. And when an engaging part moves to the other with the short distance from a rotating shaft in the circumferential direction of a cam groove part, a wire is pressed against the inner wall of an insertion hole by a base material part. Thereby, a wire is hold | maintained strongly.

  Further, since the engaging portion makes point contact with the cam groove portion, the pressing member can swing between the fixed shaft and the rotating ring. Thereby, a base material part can be suitably fitted along the outer surface of a wire. For example, the wire can be reliably held without being affected by the parallelism of the wire and the insertion hole, as compared with the case where the engaging portion and the rotating ring are in surface contact instead of point contact.

  As described above, according to this configuration, a sufficient clamping force can be obtained with a simple configuration.

It is a front view which shows typically the wire holding device by 1st Embodiment of this invention, Comprising: The figure which shows the clamp state in which the wire is inserted and hold | maintained. It is a side view which shows typically the wire rod holding device by 1st Embodiment of this invention, Comprising: The II direction arrow line view of FIG. It is side surface sectional drawing which shows typically the wire holding | maintenance apparatus by 1st Embodiment of this invention, Comprising: The III-III sectional view taken on the line of FIG. It is a front view which shows typically the wire holding device by 1st Embodiment of this invention, Comprising: The figure which shows the unclamp state before a wire is inserted. FIG. 4 is a diagram corresponding to FIG. 3, and shows a state when force in the pulling direction is applied to the wire. Side surface sectional drawing which shows typically the wire holding | maintenance apparatus by 2nd Embodiment of this invention.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
[Constitution]
The configuration of the first embodiment of the present invention will be described with reference to FIGS. As illustrated in FIGS. 1 and 2, the wire rod holding device 101 according to the present embodiment includes a fixed shaft 20, a rotating ring 30, a pressing member 40, and a rotating mechanism unit 50. In addition, the wire 10 of this embodiment is a straight copper wire whose axial cross section forms a square shape. The holding device 101 is mounted on a shuttle that moves on the processing line and moves through the station. The wire 10 held by the holding device 101 is sequentially bent at various angles and formed into a predetermined shape. It has become so.

  FIG. 1 is a schematic front view of the wire rod holding device 101 according to the first embodiment of the present invention, and shows a view as seen from the wire rod insertion direction side. In the present embodiment, the wire insertion side, that is, the front side in FIG. 1, is the front, the right side in FIG. 1 is “one”, the left side is “the other”, and the vertical direction in the installation state shown in FIG. explain.

  An insertion hole 21 is formed in the central axis L portion of the fixed shaft 20 so as to penetrate in the axial direction. The wire 10 as a workpiece is inserted into the insertion hole 21. The axial section of the insertion hole 21 is formed in a rectangular shape that is substantially the same shape as the axial section of the wire 10. A cutout groove 22 is formed in the fixed shaft 20 in a slit shape from the insertion hole 21 toward the radially outward direction. The cutout groove 22 is formed obliquely upward at 45 degrees from a horizontal plane V1 passing through the central axis L when viewed from the axial direction.

  The rotation ring 30 has an annular shape and is externally fitted so as to be rotatable relative to the fixed shaft 20. The rotation axis L of the rotation ring 30 coincides with the central axis L of the fixed shaft. When viewed from the axial direction shown in FIG. 1, the rotating ring 30 is formed with a cam groove portion 31 having a substantially elliptical shape penetrating in the axial direction. The cam groove portion 31 is formed at a position approximately 45 degrees from the horizontal plane V1 passing through the central axis L so as to be positioned on the radially outward extension line of the notch groove 22.

  Further, the cam groove portion 31 is formed such that the distance from the rotation axis L of the rotation ring 30 is gradually shortened from one to the other in the circumferential direction. In the present embodiment, the distance from the rotation axis L is formed so as to gradually become shorter in the clockwise direction in FIG. In the rotation ring 30, one side surface and the lower end surface where the rotation mechanism unit 50 is provided are chamfered and are both formed in a flat shape.

  The pressing member 40 includes a base material 41, a shaft 42, and a roller 43, which are integrally formed. The base material 41 includes a flat thin portion 44 disposed in the notch groove 22 and a thick portion 45 formed continuously from the thin portion 44 in the radially outward direction. The pressing portion 46 formed with one end of the thin portion 44 on the insertion hole 21 side being recessed at a right angle is in contact with the wire 10 when the wire 10 is inserted into the insertion hole 21, so that the wire 10 is placed on the inner wall of the insertion hole 21. Press. The pressing part 46 contacts two adjacent surfaces extending in the axial direction of the wire 10, that is, two surfaces of the upper surface and the other surface.

  As shown in FIG. 3, the thick portion 45 is formed so as to protrude from a portion closer to both ends of the thin portion 44 in the axial direction, and the axial cross section has a hexagonal shape. The thick portion 45 is thicker in the axial cross section than the thin portion 44, and a shaft insertion hole 47 is formed so as to penetrate in the axial direction. Both ends of the shaft 42 are inserted into the holes 47. The roller 43 has a shape in which the outer diameter in the axial direction of the rotating ring 30 is gradually reduced from the central portion 431 toward the end portions 432 and 433 so that the outer shape of the roller 43 is convex. Match.

  In the pressing member 40 configured as described above, the thin portion 44 is positioned in the notch groove 22, and the roller 43 is brought into point contact with the cam groove portion 31 at points P1 and P2 (see FIG. 3), so that It is arranged between the moving ring 30. That is, the base material 41 is formed so as to extend from the roller 43 as an engaging portion to the inside of the notch groove 22, and is formed so that the wire 10 can be pressed against the inner wall of the insertion hole 21 by the pressing portion 46.

  The roller 43 can reciprocate in the circumferential direction along the shape of the cam groove portion 31 following the rotation of the rotation ring 30. Further, as the roller 43 makes point contact with the cam groove portion 31, the pressing member 40 can swing between the rotating ring 30 and the fixed shaft 20 as indicated by an arrow S in FIG.

  The rotation mechanism unit 50 is a mechanism for rotating the rotation ring 30 relative to the fixed shaft 20. The rotation mechanism unit 50 includes a fixed block 51, a movable block 52, and a plurality (two in this embodiment) of springs 53 and 54 (see FIG. 2). The fixed block 51 is fixed to the fixed shaft 20 by screws (not shown) inserted from below. When viewed from the axial direction, the movable block 52 is disposed at a position away from the vertical plane V2 passing through the central axis L with respect to the fixed block 51, and is inserted from one side surface of the screw 55 (see FIG. 2). ) To the rotating ring 30.

  The spring 53 is vertically installed in the vicinity of both end portions in the axial direction of each of the blocks 51 and 52, and a lower end thereof is fixed near one end of the fixed block 51 and an upper end is fixed near the other end of the movable block 52.

  FIG. 4 shows a state before the spring is contracted and the wire is clamped. As indicated by a white arrow in FIG. 4, the movable block 52 approaches the fixed block 51 by mechanically applying a force F to the movable block 52 against the biasing force of the spring 53. In conjunction with this, the rotation ring 30 rotates in a predetermined direction R2 clockwise when viewed from the front. In addition, when the force F pushing the movable block 52 is released, the movable block 52 is separated from the fixed block 51 by the restoring force of the springs 53 and 54, and in conjunction with this, the rotating ring 30 is deformed in front view. It rotates clockwise and in a return direction R1 (see FIG. 1) opposite to the predetermined direction R2.

[Action]
Next, the operation of the wire rod holding device 101 of this embodiment will be described together with the procedure for inserting and holding the wire rod 10 in the insertion hole 21. First, a force F is mechanically applied by an external drive in the direction indicated by the white arrow in FIG. 4 to press the movable block 52 against the fixed block 51 side. As described above, the rotation ring 30 rotates in the predetermined direction R2 in conjunction with the movable block 52.

  At this time, the roller 43 slides in the cam groove 31, and the pressing member 40 moves backward in the direction away from the central axis L as shown by an arrow A 2 to be in the release position, and the pressing portion 46 is separated from the insertion hole 21. Thus, the insertion hole 21 is largely released. As a result, the wire 10 can be inserted into the insertion hole 21. In this state, the wire 10 is inserted into the insertion hole 21.

  Thereafter, when the force F pushing the movable block 52 is released, the springs 53 and 54 are extended to the natural length, and the rotating ring 30 is rotated in the return direction R1 in conjunction with the movable block 52 as described above. . At this time, the pressing member 40 operates opposite to the above, and moves forward in the direction approaching the central axis L as shown by an arrow A1 in FIG. Thereby, the pressing part 46 presses the two surfaces of the wire 10 more strongly against the fixed shaft 20, and the holding state of the wire 10 is locked by the urging force of the springs 53 and 54. That is, after the wire 10 is held, the wire 10 is held only by the urging force of the springs 53 and 54 without applying any external force to the movable block 52.

  Further, the roller 43 can swing because the roller 43 is in point contact with the cam groove portion 31, and the pressing portion 46 following the outer surface of the wire 10 is surely brought into contact with the wire 10, and the wire 10 is held. In addition, after holding the wire 10 on the holding device 101 as described above, after bending the wire 10 after adjusting the molding direction by rotating the holding device 101 by external driving at each station on the processing line. Is given.

[effect]
(1) In the above embodiment, the springs 53 and 54 are compactly incorporated in the holding device 101. Then, due to the restoring force of the springs 53 and 54, the pressing member 40 strongly presses the wire 10 against the fixed shaft 20, whereby a sufficient holding force can be obtained with a simple configuration.

  (2) According to the above embodiment, since the apparatus configuration is simple and compact, the entire holding apparatus 101 holding the wire 10 is moved on the line from the start of the first bending process to the final forming process. Can do. For example, it is not necessary to provide a chuck cylinder or the like as a holding mechanism that is necessary for each bending process station as in the prior art, and thus the entire equipment can be made compact.

  (3) In the above embodiment, the rotating ring 30 and the pressing member 40 are in point contact. For example, when the rotating ring 30 and the pressing member 40 are in surface contact, unevenness is generated between the surface that is in contact with the wire 10 and the surface that is not in contact, and as a result, the pressing force becomes weak and the wire 10 is inserted. It becomes easy to come out from the hole 21. In this respect, in the present embodiment, by allowing the pressing member 40 to swing by point contact, the pressing member 40 swings following the outer surface of the wire 10. For this reason, it is hard to be influenced by the parallelism of the wire 10 and the insertion hole 21, and it can hold | maintain the wire 10 stably by making the press part 46 contact | abut so that it may follow the wire 10. FIG.

  (4) Also, as shown in FIG. 5, if the wire 10 receives a force in the direction of removal from the insertion hole 21, that is, in the direction of the arrow A3, the pressing member 40 It swings in the direction shown by arrow A4. Then, as shown by being surrounded by a broken line in FIG. 5, by pressing the wire 10 at a portion 461 on the opposite side to the direction in which the pressing portion 46 comes out, it is possible to make it difficult to remove the wire 10 due to the wedge effect. .

  (5) In the above-described embodiment, the pressing portion 46 has a shape corresponding to the wire 10 so as to come into contact with two adjacent surfaces extending in the axial direction of the wire 10. Thus, the wire 10 can be held more firmly and stably.

  (6) In addition, since the restoring force of the springs 53 and 54 acts on the pressing member 40 to press the wire 10, even when the pressing portion 46 and the cam groove portion 31 of the pressing member 40 are worn, the holding force is unlikely to decrease. . Furthermore, since the roller 43 is in point contact with the cam groove portion 31 instead of line contact or surface contact, there is little risk of wear over time, and the swing of the pressing member 40 can be suitably maintained.

Second Embodiment
Next, a wire holding device 102 according to a second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the first embodiment in that a spherical member 430 and collar members 434 and 435 are provided instead of the roller 43.

  As shown in FIG. 6, the spherical member 430 is fitted to the outer periphery of the shaft 42 via collar members 434 and 435 on both sides thereof. The spherical member 430 is in point contact with the cam groove 31. According to this embodiment, the effect similar to 1st Embodiment can be show | played by the effect | action of the press member 400 which has the spherical member 430. FIG.

<Other embodiments>
In the above embodiment, the wire 10 is a square copper wire, but it may be a round wire or any material. In addition, the shape of the insertion hole 21 and the press part 46 can be suitably changed according to the shape of the wire 10 to be used.

  In each of the above embodiments, the rotation mechanism unit 50 only needs to rotate the rotation ring 30 with respect to the fixed shaft 20, and may have other configurations. For example, without providing the springs 53 and 54, the movable ring 52 may be pushed down by driving the air cylinder to rotate the rotating ring 30.

  The present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 101 ... Holding device 10 ... Wire rod 20 ... Fixed shaft 30 ... Turning ring 40 ... Pressing member 50 ... Turning mechanism part 41 ... Base material (base material part)
43 ・ ・ ・ Roller (engagement part)
51: fixed block 52: movable blocks 53, 54: spring L: rotation axis, central axis

Claims (5)

A fixed shaft (20) having an insertion hole (21) into which the wire (10) is inserted, and a notch groove (22) notched radially outward from the insertion hole;
A rotating ring (30) provided on an outer periphery of the fixed shaft so as to be rotatable relative to the fixed shaft;
A rotation mechanism (50) for rotating the rotation ring relative to the fixed shaft;
A cam groove portion (31) provided so as to extend in the circumferential direction and the axial direction of the rotating ring, and the distance from the rotating shaft (L) of the rotating ring gradually decreases from one to the other in the circumferential direction;
Engagement parts (43, 430) that make point contact with the inner wall of the cam groove part and can reciprocate in the circumferential direction of the cam groove part, and extend from the engagement part to the inner wall of the notch groove to the inner wall of the insertion hole. A pressing member (40, 400) having a base part (41) capable of pressing the wire,
With
The rotation mechanism unit is
A fixed block (51) fixed to the fixed shaft;
A movable block (52) fixed to the rotating ring;
A spring (53, 54) having one end fixed to the fixed block and the other end fixed to the movable block;
A wire rod holding device. The engaging portion (43) has a shape in which the outer diameter in the axial direction of the rotating ring gradually decreases from the central portion (431) to the end portions (432, 433) so that the outer shape thereof is convex. The wire rod holding device according to claim 1 . A fixed shaft (20) having an insertion hole (21) into which the wire (10) is inserted, and a notch groove (22) notched radially outward from the insertion hole;
A rotating ring (30) provided on an outer periphery of the fixed shaft so as to be rotatable relative to the fixed shaft;
A rotation mechanism (50) for rotating the rotation ring relative to the fixed shaft;
A cam groove portion (31) provided so as to extend in the circumferential direction and the axial direction of the rotating ring, and the distance from the rotating shaft (L) of the rotating ring gradually decreases from one to the other in the circumferential direction;
Engagement parts (43, 430) that make point contact with the inner wall of the cam groove part and can reciprocate in the circumferential direction of the cam groove part, and extend from the engagement part to the inner wall of the notch groove to the inner wall of the insertion hole. A pressing member (40, 400) having a base part (41) capable of pressing the wire,
With
The engaging portion (43) has a shape in which the outer diameter in the axial direction of the rotating ring gradually decreases from the central portion (431) to the end portions (432, 433) so that the outer shape thereof is convex. der Ru wire holding device. The wire rod holding device according to any one of claims 1 to 3, wherein a rotation axis of the rotation ring coincides with a central axis of the fixed shaft. The wire rod has a rectangular cross section in the axial direction,
The wire holding apparatus according to any one of claims 1 to 4, wherein the base portion is in contact with two adjacent surfaces extending in the axial direction of the wire.

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