JP3969325B2 - Coil insertion method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coil insertion method and apparatus for inserting a coil into a slot formed in an inner peripheral portion of an annular stator core in the axial direction.
[0002]
[Prior art]
As a conventional coil insertion method and apparatus, there is one described in Patent Document 1, for example.
[0003]
[Patent Document 1]
JP 2002-325408 A
[0004]
This is to insert a coil 7 wound around a coil winding jig 5 from a plurality of slots 3 formed on the inner peripheral surface of a cylindrical stator core 1 as shown in FIG. is there.
[0005]
The coil 7 is formed by continuously winding a coil winding around a plurality of coil winding jigs 5, and among these, two coil winding jigs 5 are arranged in the stator core 1. Are inserted and set from the direction perpendicular to the paper surface in FIG. At this time, a gap 13 into which the coil 7 enters is formed between the left and right side surfaces and the side surface of the recess 11 in FIG. 8 of the coil winding jig 5. A plate-like blade 15 is inserted.
[0006]
Then, by moving the blade 15 downward along the gap 13, the coil 7 is pushed down and inserted into the slot 3. After inserting the coil, the two coil winding jigs 5 from which the coil 7 has been removed are removed from the jig body 9.
[0007]
When the two coils 7 are inserted into the corresponding slots 3, the stator core 1 is rotated so that the slot 3 into which the coil 7 is inserted next becomes a position corresponding to the gap 13. The two coil winding jigs 5 are set on the jig main body 9 in the same manner as described above, and the two coils 7 are inserted by the blade 15.
[0008]
Thereafter, similarly, the stator core 1 is sequentially rotated, and the coils 7 are inserted into the corresponding slots 3 two by two.
[0009]
Here, the coil winding jig 5 is divided into two pieces along the axial direction of the stator core 1 (direction perpendicular to the paper surface in FIG. 8), as shown in a perspective view in FIG. The jig bodies 15 and 17 are as follows.
[0010]
When the coil 7 is wound around the coil winding jig 5, as shown in FIG. 9, the coil 7 is wound in a state where a predetermined interval L is formed between the two jig bodies 15 and 17.
[0011]
The interval L can be ensured by, for example, attaching two fixing pins with the interval L fixed to each jig body 15 and 17 so as to penetrate in the vertical direction in FIG. After the coil 7 is wound, by removing the two fixing pins, the distance L between the jig bodies 15 and 17 becomes L = 0, and the tension of the wound coil 7 is lowered.
[0012]
In this state, the coil winding jig 5 is inserted and set in the recess 11 of the jig main body 9 from the direction orthogonal to the paper surface in FIG.
[0013]
[Problems to be solved by the invention]
By the way, in the above-described conventional one, after the coil 7 is wound around the coil winding jig 5, the securing of the space L between the jig bodies 15 and 17 is released, so that the coil 7 is restored by its restoring force. As shown in FIG. 5, the blade 15 is easily loosened, and the operation of pushing down the coil 7 by the blade 15 is facilitated.
[0014]
However, when the coil winding jig 5 with the coil 7 still loose is inserted and set in the recess 11 of the jig body 9, the width W of the coil 7 shown in FIG. 10 is larger than the width of the recess 11 shown in FIG. As a result, the insertion force increases into the recess 11 of the coil winding jig 5 and the insertion work takes a long time and the coil 7 is damaged.
[0015]
In particular, the dimensional difference between the coil winding jig 5 and the concave portion 11 of the jig main body 9 and the stator core 1 has a very small functional relationship, so that the above-described problem is likely to occur.
[0016]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to make it easy to set a coil winding jig on a jig body and to prevent the coil from being damaged.
[0017]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a plurality of slots are formed by extending in the axial direction along the inner peripheral portion of an annular stator core, arranged at positions facing the slots, and a coil is wound. A jig body for holding the coil winding jig inserted and set in a recess having an opening for insertion on at least one surface in the axial direction, and between the jig body and the coil winding jig. In a coil insertion method in which a coil located in the gap is pressed by a pusher set in the gap and inserted into the slot, the coil winding jig is held in the jig body along the axial direction. In a state where a predetermined interval is formed between the two split pieces, a coil winding is formed across the split pieces to form a coil. Wrapped An interval maintaining member is arranged between the two split pieces of the coil winding jig to maintain the predetermined distance, and in this state, the coil winding jig is inserted into the concave portion from one side of the two split pieces. The coil insertion method includes inserting through an opening and then releasing the maintenance of the predetermined interval by the interval maintaining member.
[0018]
【The invention's effect】
According to the present invention, in the state where the coil winding jig is inserted into the concave portion of the jig main body through the insertion opening from one side of the two split pieces, the interval maintaining member is disposed between the two split pieces. In this case, the coil is wound around the coil winding jig in a state having a predetermined tension without loosening, and the coil winding jig is set on the jig body. Can be easily performed without damaging the coil, and after the insertion, the interval maintaining member is removed, so that the coil can be easily inserted into the slot of the stator core.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0020]
FIG. 1A is a perspective view showing a state in which a spacing member 35 is set on a coil winding jig 21 used in the coil insertion device shown in FIGS. 2 and 3 according to the first embodiment of the present invention. FIG. 4B is an exploded perspective view of the gap maintaining member 35, and FIG. 4C is an operation explanatory view showing a state in which the coil winding jig 21 of FIG. It is.
[0021]
The coil winding jig 21 is set along the axial direction (left-right direction in FIG. 2) of the stator core 23 in a state where the coil winding jig 21 is set on the stator core 23 in the same manner as the conventional one shown in FIGS. It is comprised by the jig bodies 25 and 27 as a divided piece divided | segmented into two.
[0022]
As shown in FIG. 4, which is an enlarged view of arrow A in FIG. 2, the concave portion 31 of the jig main body 29 in which the coil winding jig 21 is set is located at the tip side of the jig main body 29 (the lower part in FIG. 4 The width in the left-right direction is wider than the base end side (upper side in FIG. 4). Correspondingly, the coil winding jig 21 is also wider on the distal end side than on the proximal end side. That is, the shape seen from the axial direction of the stator core 23 of the coil winding jig 21 is a trapezoid whose lower base is longer than the upper base in FIG.
[0023]
On the other hand, the width in the axial direction of the stator core 23 of the coil winding jig 21 (in the direction orthogonal to the paper surface in FIG. 4), as can be seen in FIG. (Upper side in FIG. 4) is formed wider than the tip side (lower side in FIG. 4). That is, the shape of the coil winding jig 21 viewed from the left and right in FIG. 4 is a trapezoid whose upper base is longer than the lower base.
[0024]
By forming the coil winding jig 21 as described above, when the coil 33 is wound across the two jig bodies 25 and 27, the length of one turn of the coil 33 is set to the coil winding jig 21. It can be made constant from the distal end side to the proximal end side (from the lower side to the upper side in FIG. 4).
[0025]
The coil winding jig 21 winds the coil 33 in a state where a predetermined distance L is secured between the jig bodies 25 and 27, as in the conventional one shown in FIG. The winding operation will be described later. The securing of the above-described distance L is, for example, as shown in FIG. 1 with two fixing pins each having a fixed distance L between the jig bodies 25 and 27 being attached to the jig bodies 25 and 27 in FIG. What is necessary is just to penetrate and attach in an up-down direction.
[0026]
After the coil 33 is wound, the two fixing pins described above are removed, and the resin interval maintaining member 35 shown in FIG. 1B is set on the coil winding jig 21. The interval maintaining member 35 includes a U-shaped first member 37 and a rod-shaped second member 39.
[0027]
The first member 37 includes a pair of insertion portions 37a that are respectively inserted on the upper and lower sides of the coil 33 between the jig bodies 25 and 27, and a connecting portion 37c that connects one end of the pair of insertion portions 37a. An engaging recess 37d is provided on the side surface of the other end of the pair of insertion portions 37a. On the other hand, the second member 39 is provided with engagement recesses 39a that are detachably coupled to the engagement recesses 37d described above on the side surfaces at both ends in the longitudinal direction.
[0028]
Further, the first member 37 is formed so that the lower insertion portion 37b is longer than the upper insertion portion 37a in accordance with the shape of the trapezoidal coil winding jig 21, and the connection portion 37c is formed on the coil winding jig 21. It can be placed along the side. When the insertion portions 37a and 37b of the first member 37 are inserted between the jig bodies 25 and 27 and the connecting portion 37c is arranged along the side surface of the coil winding jig 21 and brought into contact with the coil 33. The engaging recess 37d is set so that the engaging recess 37d is positioned in the vicinity of the side surface on the opposite side of the coil winding jig 21.
[0029]
Therefore, as shown in FIG. 1A, in a state where the engagement recess 39a of the second member 39 is engaged with the above-described engagement recess 37d, the second member 39 is formed of the coil winding jig 21. The first member 37 is disposed along the side surface opposite to the side where the first member 37 is inserted, and comes into contact with the coil 33.
[0030]
As shown in FIG. 1A, the first member 37 is inserted from the one side of the coil winding jig 21 with the insertion portion 37a inserted between the jig bodies 25 and 27 and protruded to the other side. A predetermined distance L is secured between the jig bodies 25 and 27 by engaging the engaging recess 39a of the second member 39 with the mating recess 37d.
[0031]
Further, in FIG. 1A of the coil winding jig 21, upper end faces 25 a and 27 a are provided with concave grooves 25 b and 27 b extending along the axial direction of the stator core 23, while FIG. As shown in FIG. 4, positioning bottom projections 29b that fit into the concave grooves 25b and 27b are provided on the bottom surface 29a of the concave portion 31, respectively. By fitting the positioning protrusions 29b into the concave grooves 25b and 27b, a gap 40 is formed between the left and right side walls of the coil winding jig 21 and the concave portion 31 in FIG.
[0032]
Next, the whole coil insertion apparatus will be described with reference to FIGS. 2 and 3.
[0033]
The jig main body 29 shown in FIG. 4 protrudes horizontally from the upper end of the column 43 standing on the base 41 toward the stator core 23 side, and is at the tip of the arm portion 45 having an L shape in plan view. It is drooping. As shown in FIG. 4, the jig body 29 has the coil winding jig 21 around which the coil 33 is wound inserted and set in the recess 31, and presses the coil 33 to press the slot 47 of the stator core 23. The pusher 49 to be inserted into is held. The pusher 49 is elastically supported by the coil spring 51 and is set at the upper end of the gap 40 between the coil winding jig 21 and the recess 31 in a state of being inserted and set in the recess 31 of the jig body 29. .
[0034]
The pusher 49 described above is pushed down in the gap 52 when the pressing tool 93 disposed above the pusher 49 is lowered. Further, the stator core 11 is set on a work setting jig 95 and can move on the linear guide rail 97 in a direction approaching and moving away from the jig main body 29. As shown in FIG. 4, the slot 47 faces the slot 47.
[0035]
A winding machine 53 is arranged on the left side of the base 41 in FIG. In the winding machine 53, the coil 33 is continuously wound on a total of twelve coil winding jigs 21 sequentially connected by two kinds of connection jigs 55 and 57.
[0036]
In the coil winding jig 21 described above, twelve pieces are connected via connecting jigs 55 and 57 with the upper and lower ends as connecting portions in FIG. 1A, and rotation support shafts 59 and 61 are connected to both ends. It is detachably connected and rotatable. In FIG. 2, a motor 63 is connected to the left rotation support shaft 61, and the twelve coil winding jigs 21 are rotated together by driving the motor 63.
[0037]
As shown in FIG. 3, the coil winding machine 53 sequentially feeds four coil windings 69 from the four winding reels 67 that rotate simultaneously, and supplies them through the coil supply unit 71.
[0038]
The coil supply unit 71 includes a moving base 75 that moves in the left-right direction in FIG. 3 along the linear guide rail 73. The moving table 75 is moved by a ball screw mechanism including a nut that is screwed to a screw rod 77 extending along the linear guide rail 73 and is rotated by a motor (not shown).
[0039]
A feed mechanism 79 is provided on the moving table 75 to converge the four coil windings 69 and send them to the winding machine 53 side.
[0040]
Next, the operation will be described.
[0041]
First, a required number (here, 12 pieces) of coil winding jigs 21 are connected by connection jigs 55 and 57, and are set on the winding machine 53 while being supported by the rotation support shafts 59 and 61. At this time, the predetermined interval L described above is formed between the two jig bodies 15 and 17 constituting the coil winding jig 21. As described above, the interval L is secured by, for example, attaching two fixing pins, each having a fixed interval L, penetrating in the vertical direction in FIG.
[0042]
At this time, the moving table 75 of the coil supply unit 71 is positioned at the right end in FIG. In this state, the end of the coil winding 69 protruding from the feed mechanism 79 is wound and fixed on the coil winding jig 21 at the rightmost end in FIG.
[0043]
Here, the motor 63 is driven to rotate the coil winding jig 21 together with the rotation support shafts 59 and 61, and simultaneously with this rotation, the moving table 75 is moved leftward in FIG. As a result, the coil winding 69 is continuously wound around the twelve coil winding jigs 21 from the right side to the left side in FIG. The coil 33 is formed continuously.
[0044]
When the winding work of the coils 33 is completed on all the coil winding jigs 21, each coil winding jig 21 is removed from the winding machine 53 together with the rotation support shafts 59 and 61. The coil winding jig 21 removed from the winding machine 53 removes the rotation support shafts 59 and 61, and also removes the connection jigs 55 and 57, and further secures an interval L between the two jig bodies 25 and 27. For this purpose, the two fixing pins (not shown) are removed and placed on the cradle 81 on the side of the stator core 23 shown in FIGS.
[0045]
In each coil winding jig 21 placed on the cradle 81, the coils 33 are continuous with each other by a jumper. The cradle 81 described above is guided by the linear guide rail 97 together with the work set jig 95 on which the stator core 23 is installed, and is movable in the left-right direction in FIGS.
[0046]
By removing the connecting jigs 55 and 57 from the coil winding jig 21 and further removing the two fixing pins, the coil 33 wound over the two jig bodies 25 and 27 is loosened by its restoring force. In order to solve this problem, the interval maintaining member 35 shown in FIG. 1B is used.
[0047]
That is, the pair of insertion portions 37a is inserted between the jig bodies 25 and 27 from one side of the coil winding jig 21, as shown in FIG. The engaging recess 39a of the second member 39 is engaged with the engaging recess 37d protruding to the other side. As a result, the predetermined distance L is maintained between the jig bodies 25 and 27.
[0048]
In this state, as shown in FIG. 1C, a part of one jig body 27 side is inserted into one of the recesses 31 provided in the jig body 29 in the direction orthogonal to the paper surface in FIG. Insert through the opening. At the time of this insertion, the gap L is maintained between the jig bodies 25 and 27 by the gap maintaining member 35 as in the coil winding operation, so that the coil 33 is not loosened and has a tension. The width W of the coil shown in FIG. 10 does not become larger than the width H of the recess shown in FIG. 8, and the operation of inserting the coil winding jig 21 into the recess 31 is easy. You can also prevent sticking.
[0049]
When a part of one jig body 27 is inserted into the recess 31 of the jig body 29, the first member 37 and the second member 39 are disengaged from each other as shown in FIG. Then, the interval maintaining member 35 is removed from the coil winding jig 21. As a result, the maintenance of the distance L is released. However, since a part of one jig body 27 has already been inserted into the recess 31 at this time, the operation of pushing the entire coil winding jig 21 into the recess 31 is not limited to the coil 33. It can be easily done without damaging.
[0050]
After inserting the coil winding jig 21 into the recess 31 of the jig body 29 as shown in FIG. 4, the work setting jig 95 shown in FIG. 2, the jig body 9 is in a state of facing the inner peripheral surface of the stator core 23, that is, the slot 47, as shown in FIG.
[0051]
After that, the pusher 49 shown in FIG. 2 is lowered to move the pusher 49 downward in the gap 52 between the coil winding jig 21 and the recess 31 and press the coil 33 to cope with it. Insert into slot 47. At this time, since the coil 33 has been released from the maintenance of the interval L described above, the coil 33 is in a slack state, and the coil insertion work into the slot 47 can be easily performed. In FIG. 1C, the pusher 49 is omitted.
[0052]
When the operation of inserting the coils 33 wound around the coil winding jig 21 in pairs into the slots 47 is completed, the pressing tool 93 is raised. As the pressing tool 93 is raised, the pusher 49 is also pulled up by the coil spring 51 and moved away from the slot 47.
[0053]
In this state, the coil winding jig 21 from which the coil 33 has been removed is removed from the jig main body 29, the stator core 23 is rotated on the work setting jig 95, and then the slot 47 into which the coil 33 is inserted becomes a jig. A position corresponding to the main body 29 is set. Thereafter, the coil winding jig 21 around which the coil 33 is wound is inserted and set again in the jig main body 29 in the same manner as described above, and the coil insertion operation is repeated.
[0054]
As described above, according to the first embodiment, in the state where one of the two jig bodies 25 and 27 is inserted into the recess 31 of the jig main body 29 through the insertion opening, both the interval maintaining members 35 are disposed. Since the predetermined interval L between the jig bodies 25 and 27 is maintained between the jig bodies 25 and 27, the coil 33 at this time is wound around the coil winding jig 21 with tension without being loosened. The coil winding jig 21 can be easily set on the jig body 29 without damaging the coil 33, and the entire coil winding jig 21 is then recessed in the state 31 with the spacing maintaining member 35 removed. Can be inserted into.
[0055]
5A is a perspective view of a coil winding jig 210 used in the coil insertion device shown in FIGS. 2 and 3 according to the second embodiment of the present invention, and FIG. 5B is a coil winding jig. FIG. This coil winding jig 210 is also divided into two along the axial direction (left and right direction in FIG. 2) of the stator core 23 in the state of being set on the stator core 23 in the same manner as the conventional one shown in FIG. It is comprised by the jig bodies 250 and 270 as a divided piece.
[0056]
The above-described coil winding jig 210 has substantially the same outer shape as the coil winding jig 21 in the first embodiment, and a predetermined distance L between the jig bodies 250 and 270, as in the first embodiment. The coil 33 is wound in a state in which is secured.
[0057]
However, in the second embodiment, the predetermined interval L is secured during the winding operation of the coil 33 in a state where the block 85 as the interval maintaining member is positioned between the two jig bodies 250 and 270. To do.
[0058]
The block 85 is formed in the shape of a flat rectangular plate, and a relief hole 270a having the same shape as the block 85 for releasing the maintenance of the predetermined interval L when the block 85 enters and the jig body 270 is repaired. It is provided on the surface facing the concrete 250.
[0059]
The front end side rod 87 is connected to one end of the block 85 on the jig body 270 side, and the base end side rod 89 is connected to the other end. The distal end side rod 87 passes through the escape hole 270a and protrudes into a notch recess 270b formed on the opposite side, and this protrusion is fixed by a clip 91 as shown in FIG. In FIG. 5B, the distal end side rod 87 is prevented from coming off in the left direction.
[0060]
On the other hand, the base end side rod 89 projects the end opposite to the block 85 into a notch recess 250a formed on the end surface of the jig body 250 opposite to the jig body 270, and this protruding end is substantially The rotation operation unit 89a is bent at a right angle. The block 85 can be rotated by rotating the rotation operation unit 89a.
[0061]
The above-described rotation operation unit 89a is set at a position shifted from a position where the coil 33 (not shown) is wound so that the coil 33 does not get in the way during the rotation operation.
[0062]
Next, the operation of the second embodiment will be described. As shown in FIG. 5, the rotation operation portion 89 a of the block 85 is rotated so that the longitudinal directions thereof are substantially perpendicular to the escape hole 270 a. Thus, the predetermined interval L is formed between the two jig bodies 250 and 270. In this state, the coil 33 is wound by the winding machine 53 shown in FIGS. 2 and 3 in the same manner as in the first embodiment, and when the winding operation is completed, the coil winding jig maintaining the interval L is maintained. As shown in FIG. 6, 210 is inserted and set into the recess 31 of the jig body 29 from one jig body 270 side, and the entire coil winding jig 210 is completely inserted into the recess 31. In FIG. 6, the coil 33 is omitted.
[0063]
When inserting and setting the coil winding jig 210 into the recess 31, the jig body 250, 270 is maintained at a distance L between the jig bodies 250 and 270 by the block 85 as in the coil winding operation. Therefore, the operation of inserting the coil winding jig 210 into the recess 31 is easy, and damage to the coil 33 can be prevented.
[0064]
After the coil winding jig 210 is inserted into the recess 31, the rotation operation portion 89 a of the base end side rod 89 is rotated approximately 90 degrees from the position of FIG. 5, and the block 85 is moved away from the escape hole 270 a of the jig body 270. In this state, by pushing the proximal end side rod 89, the block 85 is inserted into the escape hole 270a.
[0065]
Thereby, the maintenance of the distance L between the two jig bodies 250 and 270 is released, the coil 33 is in a slack state, and the subsequent operation of inserting the coil 33 into the slot 47 is facilitated.
[0066]
FIG. 7 shows a third embodiment of the present invention. In this embodiment, guide grooves 2500b and 2700b are formed on the upper end surfaces 2500a and 2700a of the two jig bodies 2500 and 2700 constituting the coil winding jig 2100 along the insertion direction into the recess 31 of the jig body 29. On the other hand, a guide rail 92 is provided on the bottom surface 31 a of the recess 31 so as to protrude from the recess 31.
[0067]
The above-described guide grooves 2500b and 2700b and the guide rail 92 constitute a slide guide portion.
[0068]
The guide rail 92 is joined to a prismatic portion 92 a that fits and is fixed to the mounting groove 31 b of the bottom surface 31 a of the concave portion 31, and is joined to a lower portion of the prismatic portion 92 a so that the outer peripheral side is wider than the center side of the stator core 23. The rail portion 92b has a shape. On the other hand, the guide grooves 2500b and 2700b have the same shape as the rail portion 92b so as to be aligned with the rail portion 92b described above.
[0069]
When the coil winding jig 2100 is inserted and set in the recess 31 of the jig body 29, the coil winding jig 2100 is inserted into the rail portion 92b of the guide rail 92 protruding from the recess 31 while being slid.
[0070]
Accordingly, the coil winding jig 2100 and the jig main body 29 can be reliably positioned vertically and horizontally, and the coil setting jig 2100 can be easily inserted into the recess 31 of the jig main body 29.
[0071]
By using the guide rail structure as shown in FIG. 7 in combination with the first and second embodiments described above, the coil winding jig can be inserted into the concave portion 31 of the jig body 29 more. It becomes easier and damage to the coil 33 can be surely prevented.
[0072]
The guide grooves 2500b and 2700b may be provided on the jig body 29 side, and the guide rail 92 may be provided on the coil winding jig 2100 side.
[Brief description of the drawings]
FIG. 1A is a perspective view showing a state in which a spacing member is set on a coil winding jig used in the coil insertion device shown in FIGS. 2 and 3 according to the first embodiment of the present invention; FIG. 4B is an exploded perspective view of the gap maintaining member, and FIG. 4C is an operation explanatory view showing a state in which the coil winding jig of FIG.
FIG. 2 is a front view of the coil insertion device according to the first embodiment.
FIG. 3 is a plan view of FIG. 2;
4 is an enlarged view of the arrow A in FIG. 2;
5A is a perspective view of a coil winding jig used in the coil insertion apparatus shown in FIGS. 2 and 3 according to the second embodiment of the present invention, and FIG. 5B is a perspective view of the coil winding jig. It is a front view.
6 is a perspective view showing a state in which the coil winding jig of FIG. 5 is inserted and set in a recess of the jig body. FIG.
FIG. 7 is an operation explanatory view showing a third embodiment of the present invention.
FIG. 8 is an explanatory diagram showing a conventional coil insertion method.
FIG. 9 is a perspective view of a conventional coil winding jig.
FIG. 10 is a perspective view showing a state in which securing of the interval between two jig bodies of a conventional coil winding jig is released.
[Explanation of symbols]
21, 210, 2100 Coil winding jig
23 Stator core
25, 27, 250, 270, 2500, 2700 Jig body (divided piece)
29 Jig body
31 recess
31a Bottom of recess
33 coils
35 Spacing member
37 U-shaped first member
39 Second member
37a, 39a insertion part
37c connecting part
47 slots
49 Pusher
52 Clearance
85 blocks
87 Tip side rod
89 Proximal rod
89a Rotation operation part
92 Tapered guide rail (slide guide)
270a escape hole
2500a, 2700a End face of coil winding jig
2500b, 2700b Guide groove of the same shape as the guide rail (slide guide part)
L Predetermined interval

Claims (9)

A plurality of slots are formed extending in the axial direction along the inner peripheral portion of the annular stator core, and the coil winding jig on which the coil is wound is disposed at a position facing the slots, and at least in the axial direction. A jig body that is inserted and set in a recess having an insertion opening is provided on one surface, and a pusher that is set in a gap between the jig body and the coil winding jig is positioned within the gap. In the coil insertion method in which the coil to be pressed is inserted into the slot, the coil winding jig is composed of divided pieces that are divided into two along the axial direction while being held by the jig body. In a state where a predetermined interval is formed between the two divided pieces, a coil is wound around the two divided pieces to form a coil, and between the two divided pieces of the coil winding jig around which the coil is wound To maintain the interval A material is arranged to maintain the predetermined interval, and in this state, the coil winding jig is inserted into the concave portion from one side of the two split pieces through an insertion opening, and then the interval maintaining member is used. The method for inserting a coil, wherein the maintenance of the predetermined interval is canceled. The gap maintaining member connects a pair of insertion parts to be inserted from one side to the other side on both sides of the coil between the two divided pieces, and ends of one side of the pair of insertion parts. A U-shaped first member comprising a connecting portion to be connected, and a second member for releasably connecting the projecting portions of the first member to the other side of the first member. The coil insertion method according to 1. The interval maintaining member is configured by a block that is positioned between the two divided pieces and maintains the predetermined interval, and the block is configured to have the predetermined direction with the arrangement direction of the two divided pieces as a central axis. Rotation operation unit for providing at least one of the two divided pieces with a clearance hole that enters at a position rotated by a predetermined angle from a position to maintain the interval and releases the maintenance of the predetermined interval, and rotates the block by a predetermined angle The coil insertion method according to claim 1, wherein: A plurality of slots are formed extending in the axial direction along the inner peripheral portion of the annular stator core, and the coil winding jig on which the coil is wound is disposed at a position facing the slots, and at least in the axial direction. A jig body that is inserted and set in a recess having an insertion opening is provided on one surface, and a pusher that is set in a gap between the jig body and the coil winding jig is positioned within the gap. In the coil insertion device for pressing the coil to be inserted into the slot, the coil winding jig is composed of divided pieces that are divided into two along the axial direction while being held by the jig body. In a state where a predetermined interval is formed between the two divided pieces, a coil winding is wound around the two divided pieces to form a coil, and the coil winding jig around which the coil is wound is attached to the concave portion. For insertion When inserting through the mouth, it is provided with an interval maintaining member that is disposed between the two divided pieces to maintain the predetermined interval, and is removed after insertion to release the maintenance of the predetermined interval. A coil insertion device. The gap maintaining member connects a pair of insertion parts to be inserted from one side to the other side on both sides of the coil between the two divided pieces, and ends of one side of the pair of insertion parts. A U-shaped first member comprising a connecting portion to be connected, and a second member for releasably connecting the projecting portions of the first member to the other side of the first member. 4. The coil insertion device according to 4. The interval maintaining member is configured by a block that is positioned between the two divided pieces and maintains the predetermined interval, and the block is configured to have the predetermined direction with the arrangement direction of the two divided pieces as a central axis. Rotation operation unit for providing at least one of the two divided pieces with a clearance hole that enters at a position rotated by a predetermined angle from a position to maintain the interval and releases the maintenance of the predetermined interval, and rotates the block by a predetermined angle The coil insertion device according to claim 4, wherein the coil insertion device is provided. On both sides of the block, rods that can be rotated together with the block with respect to the two divided pieces and movable along the arrangement direction of the two divided pieces are connected, and the outside of the coil winding jig of the rod is provided. The coil insertion device according to claim 6, wherein the rotation operation portion is provided in a portion protruding from the coil. A guide for setting a coil winding jig on the bottom surface of the concave portion of the jig main body and the end surface of the coil winding jig facing the bottom surface by inserting the coil winding jig into the concave portion from the insertion opening of the jig main body. The slide guide portion has a tapered guide rail in which either the coil winding jig or the jig body has a wider outer peripheral side than the center side of the stator core. The coil insertion device according to claim 4, wherein the other side is formed by a guide groove having a shape corresponding to the guide rail. 9. The coil insertion device according to claim 8, wherein the guide rail is provided on the jig body side, and the guide rail protrudes from an opening in a recess of the jig body.

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