JP2541381B2 - Coil insertion device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil inserting device for inserting a stator coil of a rotary electric machine into a slot of a stator core, and more particularly to improvement of a mechanism for inserting the stator coil into the slot.

[0002]

2. Description of the Related Art As a conventional technique, an apparatus described in Japanese Patent Publication No. 63-43988 is known. FIG. 11 is a view showing a state of the conventional coil inserting device before the coil is inserted. The configuration of this drawing will be described. This figure shows, for example, a blade 11 consisting of 12 pieces,
An annular body 13 for arranging the blades in a ring shape with a predetermined interval.
A bed plate 14 for fixing the ring body 13, a ring body holder 15 for fixing the ring body 13 to the bed plate 14, a stripper 16 for advancing and retracting inside the ring body, and a ring formed on the outer periphery of the stripper 16. Twelve protrusions 17 that engage with the gaps in the body 13, notch corners 18 formed at the upper ends of the protrusions 17, and wedge pushers 19 integrally provided near the lower end of the stripper 16, A drive shaft 20 in which a stripper 16 is fixed and is driven to move up and down by a hydraulic cylinder (not shown), a stator core 21 fitted to a blade 11, and a large number of slots in the stator core 21.
22, a stator coil 23 inserted into the slot 22, and a wedge 24 inserted into the slot 22 to fix the stator coil 23.

Next, the operation will be described. In order to insert the stator coil 23 and the wedge 24 into the large number of slots 22 in the stator core 21 using the coil inserting device having the above structure, the wedge pusher 19 is loaded with the wedge 24, and the stator coil 23 is inserted in the gap between the adjacent blades 11. And is sandwiched, and the stator core 21 is fitted to the outer periphery of the blade 11.

FIG. 12 is a view showing a state of the conventional coil inserting device after the coil is inserted. When the drive shaft 20 is raised by the hydraulic cylinder as shown in the figure, the stator coil
23 was pushed up by the notched corner portion 18 of the stripper 16 and inserted into the slot 22.

[0005]

However, in response to the increasing demands for miniaturization, weight reduction, and high output of products in recent years, the conventional coil insertion device tries to increase the space factor of the coil. Then there was the following problem. FIG. 13 is a partial side view showing a coil inserting process by a conventional coil inserting device. In this figure (a), a plurality of stator coils 23
Is pushed up by the notched corner portion 18 of the stripper 16 and inserted into the slot 22. Furthermore, the stator coil 23
When the notch corner portion 18 is pushed up, the notch corner portion 18 and the portion of the plurality of stator coils 23 that are pushed apart by the notch corner portion 18 are pushed apart as shown in FIG.
The stator coil 23, which is easily inserted into the portion away from the inner side of the stator core 21, is wide in the outer diameter direction from the inner diameter of the stator core 21 and the arrangement is not uniform as shown in FIG. It was

FIG. 14 is a partial plan view showing the insertion state of the stator coil. This figure shows the slots 22 of the stator core 21 with two wedges 24 and two alternate slots.
The stator coil 23 inserted in 22 and the stator coil 23
It includes the projection 11 of the stripper 16 into which the blade 11 is inserted and the gap 25 between the blades 11 through which the projection 11 passes. As shown in the figure, in the conventional coil insertion device, the stator coil in the slot
There was a problem that the space factor could not be increased by that much because it was unavoidable to consider 23 wide and disorderly arrangements.

Further, since the coil 23 and the wedge 24 are driven simultaneously, the distance is determined by the jig, so that the insertable range to the stators of different axial lengths is narrow, and they are press-fitted together as a group between the finger portions when the coil is inserted. So friction rise (insertion force 20
Since a tool is used for positioning the stator, it becomes difficult after inserting one or two layers, and there is a problem that the coil needs to be corrected so as not to interfere with the tool. .

Therefore, although the required number of stator coils 23 to be inserted into the slots 22 are inserted at the same time as the wedges 24, due to the quality of the product, the required number is not inserted into the same slot at a time but divided into a plurality of times. I need to insert it. However, in the conventional method, since the coil is inserted at the same time as the wedge 24, there is a problem that if the coil is divided and inserted, the coil protrudes from the inserted slot.

Therefore, in view of the above problems, it is an object of the present invention to provide a coil insertion device which can easily achieve a high space factor in the slot of the stator coil.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a clamp guide in a coil insertion device,
It has a coil clamper and a blade. The clamp guide comprises a plurality of clamp guides, which vertically drive the inner surface of the stator core and the inner surface of the base body, and are annularly arranged with a gap therebetween. The coil clampers are radially arranged so as to face the clamp guides, and swingably drive so as to sandwich the stator coils. In this pinching, the coil clamper clamps the inscribed coil inside the inner surface of the base of the stator coils wound and sandwiched in the gap of the base. The blade slides on the inner surface of the base body and moves forward and backward together with the stripper, and has the same sectional shape as the clamp guide. The clamp guide may be driven back and forth in synchronization with the blade. In addition, the stator core
Before fixing and applying an insertion load to the stator coil,
To clamp the stator core and pull it up
Insert most of the whole stator coil into the slot.
Later push the rest into the slot with the stripper
Put in.

[0011]

According to the coil inserting device of the present invention, the base body in which the stator coil is set in the gap rises to contact the lower surface of the stator core, and the clamp guide descends to slide along the inner surface of the stator core and the inner surface of the base body. The blade is slid on the inner surface of the base body together with the stripper so that the tip of the blade comes into contact with the tip of the clamp guide. Next, the coil clamper oscillates radially, and the inscribed coil of the stator coil is sandwiched between it and the clamp guide to rise, so that the circumscribed coil of the stator coil approaches the outer surface of the base body and is attracted to the lower surface of the stator core. The layer is pulled into the slot. Therefore, when the stator coils are inserted, the pull-in angle of the stator coils is also large, so that the stator coils are aligned in the vertical direction on the pull-in side. Subsequently, the coil clamper unclamps the stator coil to raise the clamp guide, and then the stripper and wedge pusher to push the stator coil into the slot through the blade gap and insert the wedge. Thus, the aligned stator coils can be clamped and pulled in without being broken accurately.

Thus, before the insertion load is applied to the stator coil, the stator coil is clamped, and most of the stator coil is pulled into the slot so as to be pulled up, and the rest is pushed by the stripper. Positional displacement of the stator coil can be prevented, and the stator coil from the lower surface of the stator core is aligned, and since there is no contact with the stripper during insertion, the stator coil inserted into the slot maintains straightness and wedge insertion. It is possible to produce products with low resistance and higher space requirements.

The above is the action of inserting a plurality of coils into the slots of the stator core at the same time as the wedges. Next, regarding the action that the coil does not protrude from the slot of the stator core without inserting the wedge and the coil at the same time, the insertion order is the same as that in which the plurality of coils are inserted at the same time as the wedge,
The difference is the action after the push-in insertion is completed, and when the stripper 66 rises to the push-in insertion length l,
The coil is inserted into the slot, but as in the conventional case, if the stripper 66 and the blade 68 descend from this state, the coil will protrude from the slot that has been carefully inserted, so the clamp guide 52 used for retraction insertion.
Is again lowered to the upper surface of the stripper 66.
Next, the clamp guide 52 is lowered so as to be synchronized with the lowering of the stripper 66 and the blade 68, so that the inscribed coil 51c is guided by the outer surface 52c of the clamp guide, and the coil 51 pushed in the outer peripheral direction of the core and the coil 51 entering the slot is removed from the core. It is to be held by the clamp guide 52 without protruding. Due to the above action, the coil can be inserted without protruding from the slot of the stator core without inserting the wedge and the coil at the same time. Can be generated.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of a coil insertion device according to an embodiment of the present invention. The overall configuration of this figure will be described. This figure shows a wedge holder 41 as a base body for aligning and sandwiching the stator coil before inserting the stator coil, which will be described later, a ring body 42 having 12 wedge holders 41, and a wedge holder.
Bolts 43 that evenly connect 41 to the outer circumference of the ring 42, and the ring 42
Plate 44 with bolts and rotational positioning
A core holder 45, a stator core 46 fitted into the core holder 45 and positioned in an outer peripheral groove (not shown) of the core holder 45, a slot 46a of the stator core 46 which is in contact with each wedge holder 41 at its center, and a thrust receiving portion of the stator core. Holding jig 47, a plurality of radially arranged clampers 48, and an inner slope 48a provided on each clamper 48.
A ring cam 49 that gives a driving force to the clamper 48, a cam surface 49a of the ring cam 49 that presses the inner slope 48a by the wedge principle, a bolt 50 that connects the ring cam 49, and a stator coil 51 that is inserted into the slot 46a. Wedge holder
A clamp guide 52 that is slidable on the inner surface of the base body made of 41 and the inner surface of the stator core 46 and clamps the stator coil 51 between the clamper 48, and a fulcrum 53 of the clamper 48 that is held in parallel with the clamp guide 52. A bolt 54 that fixes the clamp guide 52, a holder 55 that is coupled to the outer periphery of the bolt 54 so that the clamp guide 52 is annularly arranged with a gap 54, and a rod that connects the ring cam 49 with the bolt 50. 56 and the base 57 where the holder 55 is joined with the bolt
A clamp cylinder 58 that drives the ring cam 49 via the rod 56 and the like; a bearing 60 that is fitted to the holder 55 and allows the rod 56 to slide; and a base 57 (not shown in the figure). An advance / retreat drive for controlling the position is provided, and the advance / retreat drive of this base 57 causes the coil clamper 48
And a guide bar 64 such as a clamp guide 52 that is rotationally positioned so that a series of forward / backward movements occur, a bolt 65 that fixes the base 57 to the holder 55, and a stripper 66 that moves up and down along the inner surface of the ring body 42. A bolt 67 that connects the stripper 66, a blade 68 that slides on the inner surface of the base body composed of the wedge holder 41 and has the same cross-sectional shape as that of the clamp guide 52, and the coaxiality with the axis of the stripper 66 is maintained. A bearing box 69 that leans, a bearing 70 that is housed in the bearing box 69,
Stripper 66 is fastened by connecting bolts 67 and bearings
The drive box 71 supported by 70 and the blade 68 are mounted on the bearing box.
The bolt 72 coupled to the outer peripheral surface of 69, the bolts 73 and 74, the plate 75 that moves forward and backward so that the position (up and down) of itself can be controlled, and is fixed to the bearing box 69 by the bolt 73,
A guide bar 76 that rotationally positions 75 and is fixed to the plate 75 with a bolt 74, a hydraulic cylinder 77 that drives the drive shaft 71, a wedge 78 that is housed between adjacent wedge holders 41, and a stripper 66. A projection 80 provided on the circumference, a wedge pusher 81 projecting in the outer peripheral direction of the stripper 66 in the same size as the thickness of the wedge 78 on the bottom surface of the stripper 66, and a notch corner formed on the upper end of the projection 80. 82 and a connecting bolt 88 for fixing the wedge pusher 81 to the bottom surface of the stripper 66.

Details of each main part of this embodiment will be described. FIG. 2 is a diagram showing details of each main part in FIG.
The figure includes a coil clamp portion A, a stator core holding portion B, a stator coil and wedge holding portion C, and a coil stripper portion D. In the coil clamp portion A, the coil clamper 48 can rotate at the fulcrum 53, and the cam surface 49a of the ring cam 49 responds to the downward movement of the rod 56 by the coil clamper 48.
Of the ring cam 49 against the upward movement of the rod 56, the coil clamper 48 pushes the inner surface 48b of the coil clamper 48 to push the inner slope 48a of the coil clamper 48 toward the wall of the clamp guide 52. Clamp guide 52
Head away from the wall. The outer surface of the clamp guide 52 is provided with a cut 52a, an outer surface 52c and a tip 52b. FIG. 3 is a view showing the relationship among the coil clamper, the clamp guide and the insertion coil. As shown in the figure, twelve clamp guides 52 are arranged in an annular shape, and a clamp guide gap 86 through which the stator coil 51 passes is provided between them, and a clamp guide for positioning the slot inlet of the stator core 46 on the outer surface 52c. A positioning protrusion 52d is provided,
Coil clamps 48 of 6 are arranged radially opposite every other clamp guide 52, and a stator coil 51 is provided between them.
The inscribed portion 51c is provided.

In the stator core holding portion B, a stator core 46 is attached to a core holder 45, and a thrust receiver 47 capable of receiving the thrust load due to the insertion load of the stator coil 51.
A slot 46a for accommodating the stator coil 51 is provided in the stator core 46, and the upper and lower sides of the core are a core lower surface 46b and a core upper surface 46c. In the stator coil and wedge holding portion C, the wedge holder 41 provided with the ring body 42 coupled to the blade 44 is loaded with the wedge 78 in the groove of the wedge holder, and the circumscribed coil 51a, the coil intermediate layer 51b inserted into the slot 46a, and the clamp. The stator coil 51 composed of the inscribed coil 51c is set, the tip of the wedge holder contacts the core lower surface 46b, and the clamp guide outer surface 52c slides along the wedge holder inner surface 41b. FIG. 4 is a diagram showing the relationship between the stripper, the clamp guide, the stator core, and the stator coil. As shown in the figure, the stator core 46 is provided with a plurality of slots 46a into which the stator coils 51 are inserted, and the slot inlets 84 of the slots 46a are clamp guides every two slots 46a.
It faces the gap 86 of 52. The slot 46a accommodates the stator coil 51 which is pushed by the protrusion 80 of the stripper 66 through the gap 86 of the clamp guide 52. Slot entrance 84
Wedge 78 is located near the wedge pusher protrusion 81a.
And the stator coil 51 inserted into the slot is inserted near the slot inlet 84,
Prevent you from getting out. Further, the protrusion 52D of the clamp guide 52 is fitted into the other slot inlet 84 as shown in the drawing to help position the clamp guide 52.

In the coil stripper section D, the stator coil
51 The stripper 66 for insertion and the wedge pusher 81 for insertion of the wedge 78 are combined, the combined body is rotationally positioned, and the clamper 48 is a drive source capable of vertical position control.
And the vertical movement is synchronized. The blade tip 68 of the blade 68 is used to guide the stator coil 51 to the slot 46a.
a contacts the tip 52b of the clamp guide. FIG. 5 is a diagram showing the relationship between the wedge holder, the blade, and the insertion coil.

As shown in the figure, 12 wedge holders 41
Are fixed to the ring body 42 at their outer surfaces 41c by bolts 43, respectively, and wedges 78 corresponding to the stator coil 51 composed of the circumscribed coil 51a, the coil intermediate layer 51b and the clamped inscribed coil 51c are provided in the mutually adjacent gaps 79. To accommodate
Concavities and convexities 83 of the wedge 41 and the blade 68 are provided so that the blade 68 can be positioned when moving the wedge holder inner surface 41b in the vertical direction. That is, the center of the gap 79 of the wedge holder 41 and the center of the slot 46a to be inserted are aligned in the axial direction.

Next, a series of operations of this embodiment will be described. To insert the stator coil 51 and the wedge 78 into the slot 46a, set the stator coil 51 in the gap 79 of the wedge holder 41 as shown in FIG. 5, and load the wedge 78 into the groove of the wedge holder 41 to prepare for insertion. . FIG. 2 shows a state in which the stator coil 51, the wedge 78 and the stator core 46 are set. When the preparation is completed, first, the annular body 42 in which the wedge holder 41 is arranged is lifted up by a hydraulic cylinder (not shown) to raise the plate 44, and is lifted and stopped until the wedge holder tip 41a contacts the stator core lower surface 46b. To do. Next, from the top of the stator core 46 to the base 57
Is operated by its own position controllable drive, and the clamp guide middle step surface 52a causes the stator core upper surface 46 to move.
It descends and stops until it reaches c. As shown in FIG. 3, at this time, the clamp guide positioning protrusion 52D positions the slot inlet 84 of the stator core 46 shown in FIG. 4, and the clamp guide outer surface 52c slides along the wedge holder inner surface 41b. Then, when the clamp guide 52 descends and stops, the blade 68 is then moved to the plate 75 by applying a position controllable drive (not shown) to the stripper.
The blade tip 68a is raised along with 66, and is raised and stopped until the tip 68a of the blade descends first and comes into contact with the stopped clamp guide 52b. When the above state is reached, the clamp cylinder 58 is operated to lower the ring cam 49 and oscillate the coil clamper 48 radially as shown in FIG. 3 to clamp the inscribed coil 51c of the stator coil 51 with the clamp guide 52. . This state is shown in FIG. FIG. 6 is a perspective view schematically showing retraction and insertion by a coil clamper, and FIG. 7 is a side sectional view showing retraction and insertion by the coil clamper of FIG. After clamping the stator coil 51, FIG.
As shown in FIG. 7, the base 57 on the side of the clamp guide 52 is driven to move up in the opposite direction to the above, and the clamped inner coil 51c is pulled up, so that the outer coil 51a shown in FIG. The coil intermediate layer 51b is inserted into the slot 46a. Moreover, as shown in FIG. 7, since the pull-in angle of the stator coil 51 at the time of insertion is also large, the stator coils are aligned in the vertical direction on the pull-in side. Therefore, as shown in the perspective view of FIG. 6, it is possible to insert the stator coils 51 aligned in line into the slots 46a while clamping the stator coils 51 so as not to break them accurately and drawing the stator coils 51. The blade 68 drives the plate 75 in synchronization with the upward movement of the clamp guide 52 side base 57 during the retraction insertion, so that the retraction insertion is performed while the clamp guide tip 52b and the blade tip 68a are in contact with each other. Has become. These are the coil intermediate layer 51b and the slot 46a.
This is because when inserted in the slot, the slot inlet 84 has a role of guiding the stator coil 51 without damaging it. When the lowermost step line 51d of the drawn inscribed coil 51c reaches the position of the stator core upper surface 46c, the clamp guide 52 and the blade 68 are stopped, and the clamped inscribed coil 51c is unclamped. After unclamping, the clamp guide 52 and the blade 68 are actuated again, and stopped when the tip 68a of the blade is raised by 3 to 5 mm from the core upper surface 46c. FIG. 8 is a side sectional view showing push-in insertion by the stripper. Blade 68 stopped completely,
As shown in FIG. 8, only the clamp guide 52 rises again, returns to its original position, and stops.

Stripper during retraction insertion
Since 66 came up with the rise of blade 68,
When the pull-in insertion is completed, the push-in insertion can be performed immediately. Then, when the clamp guide 52 finishes moving up, the push-in cylinder 77 is operated to raise the stripper 66 and the wedge pusher 81 by the push-in insertion length 1 to raise the inner coil 51c and the intermediate layer coil 51, as shown in FIG.
4b is inserted into the slot 46a by inserting the protrusion 80 of the stripper 66 shown in FIG. The wedge 78 is a wedge pusher.
The protrusion 81a of 81 inserts the wedge pusher 81 into the slot 46a at the same time as the coil 51.
When the position of 3 mm is reached, the insertion of both the stator coil 51 and the wedge 78 is completed. When the insertion operation is completed, the blade 68 moves down together with the stripper 66 to the position shown in FIG. 2 and one step is completed.

Thus, the stator core 46 is fixed and the coil
Clamp the coil 51 before applying insertion load to 51,
80% of the whole coil to the core slot 46a so as to pull it up
And insert the remaining 20% at the stripper 66 and coil 51
By pushing into the core slot 46a, it is possible to prevent displacement of the coil at the beginning of insertion, and the coils from the upper and lower surfaces of the core are aligned so that there is no contact with the stripper 68 during insertion. The coil 51 inserted into the 46a is straight, and the insertion resistance of the wedge 78 is small,
It was decided to create a product with a higher occupation rate.

The above is the operation in which the plurality of coils 51 inserted into the stator core slot 46a are inserted simultaneously with the wedge 78 at the same time. Next, without inserting the wedge 78 and the coil 51 at the same time, the required number of coils are inserted into the same core slot 46a in plural times until the inserted coil does not protrude from the slot and is ready for the next coil insertion. The operation will be described. The insertion sequence is the same as that in which a plurality of coils are inserted at the same time as the wedge at the same time, but the difference is that after the push-in insertion shown in FIG. 8 is completed, the operation is the stripper. The coil is inserted into the slot when 66 has been pushed up to the insertion length l. If the stripper 66 and the blade 68 descend from this state, the coil will stick out from the slot that has been put in. Therefore, the clamp guide 52 used for retracting insertion
After the stripper 66 has been pushed up to the insertion length l and is lowered again to the upper surface of the stripper 66. Next, clamp guides are synchronized with the lowering of the stripper 66 and blade 68.
52 is also lowered. FIG. 9 is a diagram showing a coil holding state when the wedgeless coil is inserted when the wedge / coil is not inserted at the same time. As shown in this figure, the outer surface 52c of the clamp guide allows the inner coil 51c to
The coil 51 which is guided and pushed in the outer peripheral direction of the core is held by the clamp guide 52 without protruding from the core. Further, the clamp guide 52 is lowered to be the same as the state before the insertion. However, the middle surface 52a of the clamp guide does not reach the upper surface 46 of the stator core and stops near the upper surface of the inserted coil. FIG. 10 is a detailed perspective view of the relationship between the coil, the stator core and the clamp guide in FIG. As shown in FIG. 10, the coils arranged on the upper and lower surfaces of the stator core are held by the clamp guide outer surface 52c. Therefore, the coil inserted into the slot can be held without protruding. Due to the above operation, the coil can be inserted without protruding from the slot of the stator core without inserting the wedge and the coil at the same time. Can be generated.

More specifically, the coil 51 is wedged from the bottom.
Since 78 is driven from above, the adjustment range is widened, there is no restriction on the axial length, and coil 51 can be retracted instead of being pushed into slot 46a, which reduces the coil insertion pressure (400 kg or less). Therefore, it is not necessary to use the centering tool by providing the angle matching means. The present invention,
The details of the above embodiment are not limited, and the cylinder 58 may be pneumatic, hydraulic, or an electric motor operating system, for example. Further, the timing of coil insertion does not have to be in the order of the embodiment, and for example, retracting insertion and pushing insertion may be operated at the same timing.

[0024]

As described above, according to the present invention, the stator coils arranged side by side are clamped, so that it is possible to insert the stator coil into the slot while pulling it in. Since the stator coil has a large retract angle and the stator coils are aligned vertically in the retract side, it is thinner than the conventional product, contributing to the miniaturization, weight reduction, and higher output of the product. it can. Further, since the push-insertion is slightly present at the final portion of the insertion, the damage to the coating of the stator coil is also slight, and the protrusion from the slot of the stator coil and the manufacturing defect such as the broken stator coil can be greatly reduced.

Further, since the coil can be held even after the coil is inserted so that the coil does not protrude from the slot of the stator core even if the wedge and the coil are not inserted at the same time, the coil insertion required for the same core slot can be performed a plurality of times. Since it can be performed separately, the coil insertion force can be reduced, and by combining with the pull-in insertion, it is possible to contribute to the production of high quality products.
This is a great effect to insert the winding.

[Brief description of drawings]

FIG. 1 is a side sectional view of a coil insertion device according to an embodiment of the present invention.

FIG. 2 is a diagram showing details of each main part in FIG.

FIG. 3 is a plan view showing a relationship among a coil clamper, a clamp guide, and an insertion coil.

FIG. 4 is a diagram showing a relationship between a stripper, a clamp guide, a stator core, and a stator coil.

FIG. 5 is a diagram showing a relationship between a wedge holder, a blade, and an insertion coil.

FIG. 6 is a perspective view schematically showing retracting and inserting by a coil clamper.

FIG. 7 is a side sectional view showing pull-in insertion by a coil clamper.

FIG. 8 is a side sectional view showing push-in insertion by a stripper.

FIG. 9 is a view showing a state in which the coil is held after the coil is inserted when the wedge is not inserted at the same time as the coil.

FIG. 10 is a detailed perspective view of the relationship between the coil and the stator core & clamp guide in FIG. 9.

FIG. 11 is a diagram showing a state of a conventional coil insertion device before a coil is inserted.

FIG. 12 is a diagram showing a state of the conventional coil insertion device after the coil is inserted.

FIG. 13 is a partial side view showing a coil insertion process by a conventional coil insertion device.

FIG. 14 is a partial plan view showing a conventional insertion state of a stator coil.

[Explanation of symbols]

 41 ... Wedge holder 42 ... Annular body 46 ... Stator core 46a ... Slot 48 ... Coil clamper 51 ... Stator coil 52 ... Clamp guide 66 ... Stripper 68 ... Blade 78 ... Wedge 79 ... Gap

Claims (5)

(57) [Claims] 1. A gap for sandwiching a stator coil pre-wound so as to be inserted into a slot of a stator core, is located below the stator core, and its inner surface is coincident with the center of the gap and the slot. In a coil insertion device having a base arranged annularly with its center aligned in the axial direction and a stripper for inserting the clamped stator coil into a slot, an inner surface of the stator core and an inner surface of the base are vertically moved. It is driven by a plurality of annularly arranged clamp guides, and the pre-wound stator coils radially arranged inwardly facing the respective clamp guides and the inner surfaces of the respective clamp guides. A plurality of pins that are inserted in the alignment and are raised with the upward drive of each of the clamp guides to be retracted and inserted into the slots at a predetermined inclination. An il clamper and the clamp guide for driving the inner surface of the base body up and down, and for forming a gap in which the stripper moves forward and backward so as to move up after being aligned and inserted by the coil clamper and push the stator coil into the slot. A plurality of blades having the same shape and arrangement are provided , and most of the entire stator coil is inserted into the slot so as to clamp and pull up the stator core before fixing the stator core and applying an insertion load to the stator coil. Then, finally, the rest is pushed into the slot by the stripper. 2. The coil insertion device according to claim 1, wherein the coil clamper clamps a portion of the stator coil wound and sandwiched in the gap of the base body, the portion being inside the inner surface of the base body. 3. The coil insertion device according to claim 1, wherein the clamp guide is driven forward and backward in synchronization with the blade. 4. A gap for sandwiching a state coil pre-wound so as to be inserted into a slot of the stator core is provided, and the inner surface of the stator core is aligned with the gap, and the center of the gap is aligned with that of the slot. In a coil insertion device having a base arranged annularly so that the center thereof is aligned in the axial direction, and a stripper for inserting the sandwiched stator coil into a slot by inserting the inner surface of the stator core and the inner surface of the base. An inner surface of each clamp guide that is vertically driven and that has a plurality of glump guides that are annularly arranged with a gap kept between them and the stator coils that are radially wound inside and that face each of the section lamp guides and that are pre-wound. And a plurality of pins which are inserted in alignment with each other and are raised with the upward drive of each of the clamp guides to be retracted and inserted into the slots at a predetermined inclination. An il clamper and the clamp guide for forming a gap in which the stripper moves forward and backward so as to drive the inner surface of the base body up and down and rise after being aligned and inserted by the coil clamp to push the stator coil into the slot. The plurality of blades having the same shape and arrangement are provided, and the stator guide is retracted and inserted by the clamp guide and the coil clamp, and after the pusher insertion is further performed by the stripper, the blade is again resynchronized so as to be synchronized with the stripper return. By lowering the clamp guide to prevent the inserted coil from jumping out of the slot, insert a plurality of coils continuously into the same slot of the stator core, and after pushing and inserting, the operation is When the stripper rises to the specified push-in length The stator coil is inserted into the slot, and the clamp guide used for pull-in insertion is moved down to the upper surface of the stripper after the stripper has pushed up to the pushing length, and then the clamp guide is synchronized with the lowering of the stripper and the blade. The guide is also lowered
Coil insertion device. 5. The insertion of a plurality of coils into the same slot of the stator core is divided into a plurality of times, and each insertion is performed without a wedge, and the coil is used as a wedge in the final insertion of the plurality of times. The coil insertion device according to claim 4, wherein the coil insertion device is inserted at once at the same time.