JP2009033865A - Winding apparatus and winding method for winding wire material on winding core thereby - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding apparatus for winding a wire material on a wiring core to form a coil, in which a gap between the wire material and the winding core or between wire materials is eliminated by preventing rise of the wire material, thereby improving an occupied area of the coil and preventing damage of an insulating coating of the wire material. <P>SOLUTION: The winding apparatus for winding a wire material on a winding core of polygonal cross section to form a coil is provided with a rotating member for fixing the winding core detachably and rotating the winding core around a main axis; a wire material feeding means for feeding the wire material to the winding core; a tension stress loading means for loading a tension stress to the wire material to be fed to the winding core; and a wire material pressing member moving in an approximating/separating direction for the winding core to the outside of the winding core. In starting to wind the wire material on a corner of the winding core, the wire material pressing member is moved near the winding core and the wire material is pressed to the corner side of the winding core, and upon completing winding of the corner of the winding core, the wire material pressing member is separated and moved from the winding core side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a winding device and a winding method for winding a wire around a winding core using the winding device, and improves the space factor of the coil and prevents damage to the wire.

  When winding the wire by rotating the winding core, if the winding core has a polygonal cross section and has a flat portion and a corner, if the wire is wound around the corner, the tension applied to the wire in the flat portion of the core However, since the wire is bent at the corners, the applied tension is small, and as shown in FIG. 10, the wire 2 is easily lifted from the core 1, and the wire 2 and the core are wound. A gap is easily generated between the wire 1 and the wire 2. As a result, there is a problem that the coil becomes thicker and the space factor of the coil tends to be lowered.

Conventionally, as a core device for winding a wire along a core, Japanese Patent No. 3336373 (Patent Document 1) has been provided.
As shown in FIGS. 11A to 11D, the winding device of Patent Document 1 gives the coil wire 4 a curvature in the direction opposite to the winding frame 3 by the restraint roller 5, and the restraint roller 5 causes the coil wire 4 to be curved. Is wound around the reel 3 while being pressed. When the coil wire 4 is wound around the flat surface portion 3a of the winding frame 3, as shown in FIG. 11B, the winding frame 3 is raised with a constant rotation angle and the restraining roller 5 is moved to the right. On the other hand, when the coil wire 4 is wound around the corner portion 3b, as shown in FIG. 11C, the winding frame 3 is lowered while being rotated, and the restraining roller 5 is moved to the left so that the coil wire 4 The coil wire 4 is wound around the winding frame 3 with a constant pass line.

Japanese Patent No. 3336373

  However, since the coil wire 4 is always pressed and wound by the restraining roller 5 in the winding device of Patent Document 1, the insulation coating of the coil wire 4 is liable to be damaged by the restraining roller 5. Furthermore, since the coil wire 4 is wound around the winding frame 3 after being subjected to bending forming opposite to the curvature of the winding frame 3 by the restraining roller 5, the coil wire 4 is bent many times. There is a problem that the coil wire 4 tends to cause work hardening.

In a motor in which a coil is wound around a stator core, motor characteristics deteriorate when the occupancy of the coil decreases. Therefore, an improvement in a winding device that forms the coil is strongly desired.
The stator arranged on the outer periphery of the rotor is a divided stator obtained by dividing a ring-shaped stator at a predetermined angle for reasons such as ease of winding, and is configured by arranging the divided stator in an annular shape and fastening it. There are many cases. Therefore, in the case of the split stator, the winding core around which the wire is wound becomes a split stator core, and both axial sides of the teeth portion of the split stator core on both sides in the axial direction including the back yoke portion on the outer peripheral side and the flange portion on the inner peripheral side. Wires are aligned and wound in an annular recess (slot portion) surrounded by walls.
When aligning and winding the wire around the slot portion of the divided stator core, when the cross section of the teeth portion is rectangular, the wire is wound around the corner, and the winding at the corner is damaged, and the wire is damaged or work hardened. It is necessary to suppress without generating.

  The present invention has been made in view of the above problems, and in a winding device in which a wire is wound around a core to form a coil, by preventing lifting at the corner of the wire, between the wire and the core or between the wires It is an object of the present invention to provide a winding device that improves the space factor of the coil and prevents damage to the insulating film of the wire.

In order to solve the above problems, the present invention is a winding device that forms a coil by winding a wire around a polygonal core in cross section,
A rotating member that removably fixes the core and rotates the core around a main axis;
Wire supply means for supplying the wire to the core;
Tension loading means for applying a required tension to the wire supplied to the winding core;
A wire pressing member that is moved in the proximity / separation direction with respect to the winding core to the outside of the winding core,
With
When starting to wind the wire around the corner of the core, the wire pressing member is moved closer to the core to press the wire against the corner of the core, and when the corner of the core is finished winding, A wire winding device is provided in which the wire pressing member is moved away from the core side.

With the above configuration, since the wire rod is pressed against the core by the wire pressing member at the corner of the core where the wire rod is likely to be lifted, the wire rod can be wound around the core without lifting from the core. Since the gap between the winding core and the wire can be eliminated, the space factor of the coil can be improved.
In the winding device, only when the wire is wound around the corner, the wire is pressed against the core by the wire pressing member, and when wound around the flat portion, the wire is wound around the core only by tension. Therefore, since the wire is not always pressed against the core by the wire pressing member, damage to the insulating resin layer on the surface of the wire can be reduced. The pressing force of the wire pressing member pressed against the core is preferably adjusted appropriately according to the radius and angle of the corner of the core.

The wire pressing member comprises a roller having a circular cross section extending in the axial direction of the core or a semicircular roller having a circular arc surface on the core side,
The wire pressing member is preferably moved in the approaching / separating direction by driving means.

  With the above configuration, when the wire pressing member is a circular roller or a semi-circular roller, friction between the wire and the wire pressing member can be reduced, and the wire is wound around the core without damaging the insulating film of the wire. Can do.

The winding core has a rectangular cross section, and the first to fourth wire pressing members corresponding to the four corners of the winding core are arranged at intervals along the periphery of the winding core as the wire pressing member. In addition, it is preferable that the first to fourth wire rod pressing members press the wire rod at each corner of the core toward the core while rotating together with the core.
The first to fourth wire rod pressing members are disposed at an angle of 90 degrees in the rotation direction, and are provided corresponding to each corner of the core. The first to fourth wire rod pressing members are rotated together with the cores, and when the wire rods are wound around the corners of the cores corresponding to the wire rod pressing members, the wire rod pressing members are brought close to each other to press the wire rods.
By providing the wire pressing member corresponding to each corner of the winding core, the wire at the four corners can be surely pressed and wound around the winding core, so that the space factor of the coil can be improved.

It is preferable that the wire supply means hold and supply the wire fed from the bobbin in a straight line without being bent to a position where the wire starts to be wound around the core.
If it is set as the said structure, compared with the case where the curvature opposite to a winding core is given and the wire is wound, since it does not bend until a wire is wound around a winding core, the work hardening of a wire can be prevented.

A winding method for winding the wire around the core using the winding device,
The winding core rotates to wind the wire, and when the wire comes into contact with a position in front of the corner of the winding core, the wire pressing member is brought close to the wire and pressed against the winding core, When the wire has been wound around the corner of the wire and the wire has been wound around the flat portion of the core, the pressing member is separated from the core.

  In the winding method, the wire rod wound around the corner portion of the winding core is pressed against the winding core to prevent the wire rod from being lifted at the corner front position, which is likely to occur when the wire rod is wound around the corner portion. It is possible to improve the space factor of the coil by eliminating the gap between the winding core and the wire or between the wires.

The winding around the winding core is preferably performed by winding one or more wires at the same time.
When a plurality of wires are wound at the same time, the time for winding the wires around the coil can be shortened, so that the number of work steps can be reduced.

The winding device and the winding method of the present invention are preferably used when the core of the divided stator that constitutes the annularly arranged stator is the winding core. In this case, the core is supported by the rotating member and rotated, and the coil is formed by winding the wire around the teeth portion having a rectangular cross section of the core.
With the winding device of the present invention, when a coil is formed by winding a wire around the core of the divided stator of the motor, irregularly shaped electric wires such as a hexagonal cross section can be accurately aligned and wound, and the occupation ratio of the coil can be increased. In addition, the motor characteristics can be improved, and a motor with high insulation reliability can be manufactured.

As described above, according to the present invention, the wire rod is pressed against the core by the wire pressing member at the corner portion of the core where the wire is likely to be lifted. Since it can wind and the gap between a wire and a core or between wire can be eliminated, the space factor of a coil can be improved.
In addition, since the wire rod is pressed around the core with the wire rod pressing member only when the wire rod is wound around the corner, and the wire rod is wound around the core with only the tension when wound around the flat surface portion, the wire rod is always the wire rod pressing member. It is not in a state of being pressed against the core, and damage to the insulating resin layer on the surface of the wire can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 9 show an embodiment of a winding device of the present invention.
In the winding device of this embodiment, a coil 52 is formed by winding a stator core 51 (hereinafter abbreviated as “core 51”) of the motor split stator 50 shown in FIG. . That is, the split stator core is used as a winding core. In addition, although the wire 60 is one in this embodiment, it is good also as multiple pieces.

First, the split stator 50 in which the coil 52 is formed will be described with reference to FIG.
The core 51 has a tooth part 51a having a rectangular cross section, and a back yoke part 51b and a collar part 51c projecting from both ends of the tooth part 51a in the axial direction, and the outer peripheral surface of the tooth part 51a, the back yoke part 51b, and the collar An annular recess surrounded by the portion 51 c becomes a coil forming slot portion 55, and the surface of the slot portion 55 is covered with an insulating resin cover 53. The four corners of the tooth portion 51a are first to fourth corner portions 51d to 51g counterclockwise, and the plane portions are also first to fourth plane portions 51h to 51k.

The wire 60 forming the coil 52 is a hexagonal wire having a regular hexagonal cross section in the present embodiment. As shown in FIG. 8, the insulating resin cover 53 is provided with a wire fitting groove 53a having a triangular cross section. The shape of the wire 60 is not particularly limited, but is preferably an irregular shape with a rectangular cross section that does not generate a gap between the upper and lower layers during aligned winding.
The split stator 50 including the coil 52 is sequentially arranged in an annular shape and fastened to be integrated.

  2 to 5 show a winding device 10 that forms a coil 52 by winding a wire 60 around the core 51.

  In the plan view of FIG. 2 schematically showing the overall configuration, A is a rotating means for removably fixing and rotating the core 51, and B is moved toward and away from the core 51, The wire pressing member disposed in the wire C, the wire rod supplying means C for supplying the wire rod 60 to the core 51, and the tension loading means D for applying a required tension to the wire rod 60 supplied to the core 51.

As shown in FIG. 2, the rotating means A includes a set block 20 that holds and rotates the core 51, holds the set block 20 with a set holder 21, and rotates the rotating spindle 22 that protrudes from the set holder 21. Are connected to a sprocket 23 which is rotatably supported by the back support frame 11. The sprocket 23 is rotated via a belt 25 by a sprocket 24 that is driven to rotate by a motor 26. The core 51 that is detachably fixed to the set block 20 is rotated around the axis L in the Z direction by the rotation of the rotary main shaft 22.
The sprocket 23 is provided with a drive device (not shown) for moving the roller 30 close to and away from the core 51.

  As shown in FIGS. 3A and 3B, the set block 20 includes core sandwiching pieces 20a and 20b on both the left and right sides. The core sandwiching pieces 20a and 20b are used to surround the back yoke portion 51b of the core 51. Holds both ends of the direction. One core holding piece 20b protrudes from the set block 20, and the other core holding piece 20a is fixed with a screw 28, and the back yoke portion 51b of the core 51 is detachable by fastening with the core holding piece 20a. The set block 20 is nipped and fixed. In a state where the core 51 is fixed to the set block 20, the first flat portion 51h of the core 51 is the upper surface.

  The wire pressing member B includes first to fourth circular rollers 31 to 34 having a circular cross section, and the first to fourth circular rollers 31 to 34 are rod-shaped first to fourth movements protruding in the axial direction X. It is provided at the tip of the materials 41-44. The first to fourth moving members 41 to 44 are fixed to the sprocket 23 and rotate together with the core 51.

The 1st-4th circular rollers 31-34 are provided along the outer periphery of the core 51, and are arrange | positioned as the angle (alpha) which each 1st-4th circular rollers 31-34 make is 90 degree | times. When the core 51 is located at the position shown in FIG. 4, the first circular roller 31 is on the first flat surface portion 51 h side of the core 51, and the second circular roller 32 is on the second flat surface portion 51 k side of the core 51. Four circular rollers 33 and 34 are arranged in order counterclockwise.
The first to fourth circular rollers 31 to 34 extended in the axial direction X with the central shafts 41a to 44a projecting from the first to fourth moving members 41 to 44 on the core 51 side are rotatably held, As shown in FIG. 4, the wire 60 can be pressed against the core 51 while rotating the first to fourth circular rollers 31 to 34.
FIG. 9 shows a modification of the wire pressing member B. The wire pressing member B may be first to fourth semicircular rollers 36 to 39 having a semicircular cross section with the core 51 side as an arc surface.

As shown in FIGS. 2 and 3, the wire supply means C includes a pulley 40, and the pulley 40 is provided at the tip of a support shaft 41 protruding in the axial direction X from the back support frame 11,
The wire 60 is held in a straight line along the pentagonal wire fitting groove 40 a and supplied to the core 51.
The tension applying means D includes a back tension device 70. As shown in the schematic front view of FIG. 5, the tension of the wire 60 fed from the bobbin 80 is adjusted through the back tension device 70, and the wire 60 is supplied to the pulley 40. is doing.

  Next, a winding method for winding the wire 60 around the core 51 in an aligned manner will be described.

First, after the core 51 is nipped and fixed by the core holding pieces 20a and 20b of the set block 20, the tension of the wire rod 60 fed out from the bobbin 80 is adjusted by the back tension device 70 and held in a straight line by the pulley 40. To the core 51.
Next, the wire 60 is wound along the fitting groove 53 a of the insulating resin cover 53 from the back yoke side winding end 52 </ b> A toward the buttock side winding end 52 </ b> B.

  As shown in FIG. 6 (A), when the wire 60 is wound around the first flat portion 51h and the wire 60 is wound around the first corner 51d of the core 51, as shown in FIG. 6 (B), the first The circular roller 31 is moved close to the first corner 51d, and the wire 60 is pressed against the core 51 at a position before the first corner 51d of the core 51. As shown in FIG. 6C, the first circular roller 31 rotates together with the core 51 in a state where the wire is pressed against the core 51. When the first corner 51d has been wound, as shown in FIG. 7A, the first moving member 41 is controlled to separate the first circular roller 31 from the core 51.

  Next, when the core 51 rotates and starts to wind the wire 60 around the second corner 51e, the second circular roller 32 is moved close to the second corner 51e as shown in FIG. The wire 60 is pressed against the core 51 at a position before the second corner 51e. When the winding of the second corner 51e is completed, the second moving member 42 is controlled to separate the second circular roller 32 from the core 51 as shown in FIG.

  Similarly, when winding the wire around the third corner 51f and the fourth corner 51g, the wire 60 is pressed against the core 51 at a position in front of the third corner 51f and the fourth corner 51g of the core 51, and the wire 60 is After winding, when the third corner portion 51f and the fourth corner portion 51g have been wound, the third circular roller 33 or the fourth circular roller 34 is separated from the third corner portion and the fourth corner portions 51f and 51g.

In this way, when the wire 60 is wound around the core 51 while pressing the wire 60 against the core 51 by the first to fourth circular rollers 31 to 34, and when the wire 60 is wound around the flat portions 51h to 51k of the core 51, the corner portion 51d. The wire 60 is bent using ~ 51 g.
When one round of winding is completed, the winding is performed up to the buttocks side winding end 52B while changing the row. After winding up to the buttock side winding end 52B, the layer is raised and wound from the buttock side winding end 52B toward the back yoke side winding end 52A. By repeating this, the coil 52 is formed by winding the wire 60 to the uppermost layer as shown in FIG.

With this configuration, only when the wire 60 is wound around the corners 51d to 51g, the wire 60 is pressed against the core 51 by the first to fourth circular rollers 31 to 34, and only tension is applied when wound around the flat portions 51h to 51k. Since the wire 60 is wound around the core 51, the wire 60 is not always pressed by the first to fourth circular rollers 31 to 34, and damage to the insulating resin layer on the surface of the wire 60 is reduced. be able to.
Further, since the wire rod 60 fed out from the bobbin 80 is supplied to the core 51 without being bent until it is wound around the core 51, the wire rod 60 is not bent until it is wound around the core 51. 60 work hardening can be prevented.

The winding device of the present invention is not limited to the case where a coil is formed on a divided stator of a motor, and can be suitably used for forming a coil for other purposes.
The present invention is not limited to the above-described embodiments, and includes various forms within the scope of the claims of the present invention.

It is a perspective view of the division | segmentation stator provided with the coil formed with the winding apparatus of this invention. (A) is a top view which shows a winding apparatus, (B) is the principal part enlarged view of (A). (A) is a front view of a winding device, and (B) is an enlarged view of a main part of (A). It is the schematic which presses a wire to a core with a circular roller. It is the schematic which shows the whole winding apparatus. (A)-(D) It is the schematic which showed the rotation of the core, and the movement of a circular roller. (A)-(D) It is the schematic which showed the rotation of the core, and the movement of a circular roller. It is a figure which shows the winding condition of the wiring around a core. It is a figure which shows the modification of a wire rod press member. It is the conventional figure which shows winding of the wire around a winding core. It is a figure which shows a prior art example.

Explanation of symbols

31-34 First to fourth circular rollers (first to fourth wire pressing members)
41-44 1st-4th moving material 51 Core 51d-51g 1st-4th corner | angular part 52 Coil 60 Wire A Rotating means B Wire material press member C Wire material supply means D Tension load means

Claims (7)

A winding device for forming a coil by winding a wire around a polygonal core in cross section,
A rotating member that removably fixes the core and rotates the core around a main axis;
Wire supply means for supplying the wire to the core;
Tension loading means for applying a required tension to the wire supplied to the winding core;
A wire pressing member that is moved in the proximity / separation direction with respect to the winding core to the outside of the winding core,
With
When starting to wind the wire around the corner of the core, the wire pressing member is moved closer to the core to press the wire against the corner of the core, and when the corner of the core is finished winding, A winding apparatus, wherein the wire pressing member is moved away from the core side. The wire pressing member comprises a roller having a circular cross section extending in the axial direction of the core or a semicircular roller having a circular arc surface on the core side,
The winding apparatus according to claim 1, wherein the wire pressing member is moved in the approaching / separating direction by a driving unit.   The winding core has a rectangular cross section, and the first to fourth wire pressing members corresponding to the four corners of the winding core are arranged at intervals along the periphery of the winding core as the wire pressing member. The winding according to claim 1 or 2, wherein the first to fourth wire pressing members rotate together with the core to press the wire at each corner of the core toward the core. apparatus.   The winding according to any one of claims 1 to 3, wherein the wire supply means holds and supplies the wire fed from the bobbin in a straight line without being bent to a position where the wire starts to be wound around the core. apparatus. A winding method for winding the wire around the winding core using the winding device according to claim 1,
The winding core rotates to wind the wire, and when the wire comes into contact with a position in front of the corner of the winding core, the wire pressing member is brought close to the wire and pressed against the winding core, A winding method characterized in that when the wire is wound around the corner of the wire and the wire is wound around the flat surface of the core, the pressing member is separated from the core.   The winding method according to claim 5, wherein the winding around the winding core is performed by simultaneously winding one or a plurality of wires.   The winding core is composed of a core of a split stator that constitutes an annularly arranged stator. The core is supported by the rotating member and rotated, and the wire is wound around a teeth portion having a rectangular cross section. The winding method according to claim 5 or 6, wherein a coil is formed.

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