JPH09140106A - Insertion of stator coil and apparatus for insertion of the same coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain reduction of stator coil inserting cost by rotating a stator coil for the angle matching the angle of forming the desired slot and then inserting the stator coil after moving it to the position corresponding to the desired slot. SOLUTION: An inserting apparatus 8 is composed of a holding means 9 for holding the end part of the linear part of the stator coil to release it at the position corresponding to the desired slot, a rotating means 10 for rotation to the angle matching the forming angle of the desired slot, a moving means 11 to the position corresponding to the desired slot and an inserting means 12 for inserting at the corresponding position. After the linear part of the stator coil is held, a frame accommodating the holding means 9, inserting means 12 and regulating means 21 is rotated by the rotating means 10. The frame body is moved to the desired slot position through vertical movement by the moving means 11. The inserting means 12 inserts the linear part of the stator coil. As a result, the stator coil can be inserted easily to the slot, to remarkably reduce the cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for sequentially inserting a stator coil into each slot of a stator core of a large rotating electric machine.

[0002]

2. Description of the Related Art Generally, a large rotating electric machine has a fixed frame of about 400 tons and a weight of one stator coil of 200 to 300 kg. Therefore, sequentially inserting a large number of stator coils into each slot of the stator iron core is a difficult task, especially when replacing the stator coils of a rotating electrical machine that has already been installed in the field. Since it is difficult to do so, various measures have been taken.

FIG. 19 is a front view showing the structure of a conventional stator coil insertion device of this type, and FIG. 20 is a side view showing the structure of the stator coil insertion device shown in FIG. In the figure, 1 is a stator frame, 2 is a ring-shaped member attached to both sides of the stator frame 1 for rotating a frame, 3 is a frame rotating device composed of a frame pedestal 3a and a drive operation section 3b, 4 Is a stator core in which a large number of slots 4a are formed on the inner surface at a predetermined pitch, and 5 is a stator coil in which bent portions 5b are formed at both ends of a straight portion 5a.

Next, the insertion work by the conventional stator coil insertion device configured as described above will be described.
First, the pipes (not shown) connected to the stator frame
Is removed, and the ring-shaped member 2 is attached and fixed to both sides of the stator frame 1 with bolts using the screw holes for brackets. Then, the stator frame 1 is lifted from the foundation of the rotating electric machine by a method such as jacking up and placed on the frame pedestal 3a of the frame rotating device 3.

Next, the stator coil is carried into the lower side of the inside of the stator core 4, and the straight portion 5a of the stator coil 5 is manually inserted into the slot 4a located at the lowermost side by utilizing gravity. To do. Thereafter, the drive operation unit 3b is sequentially operated to push up the bolts to which the ring-shaped member 2 is attached, thereby rotating the stator frame 1 on the frame pedestal 3a, and then inserting the stator coil 5 into the slot. 4a is guided to the lowermost position, and the linear portion 5a of the stator coil 5 that is subsequently carried in is inserted into this slot 4a. Then, when each stator coil 5 is inserted into all the slots 4a, a work reverse to the above process is performed to return the stator frame to the foundation of the rotating electric machine, and the work of inserting the stator coil 5 is completed.

[0006]

As described above, in the conventional work of inserting the stator coil, it is difficult to lift the stator coil 5 having a very heavy weight of 200 to 300 kg and insert it into the upper slot 4a. The stator frame 1 is detached from the foundation of the rotating electric machine, lifted, and rotated on the frame pedestal 3a of the frame rotating device 3 so that the insertion work can be performed on the lower side by using the. 1 had to be lifted from the foundation of the rotating electric machine and removed, and for that purpose it was necessary to remove all of the piping, and centering work was required to re-install after the insertion work was completed, resulting in a very long construction period. There was a problem that the cost was high.

The present invention has been made to solve the above problems, and the stator coil can be inserted into the slot of the stator core without lifting the stator frame from the foundation of the rotating electric machine. It is an object of the present invention to provide a stator coil insertion method and insertion device that can reduce costs.

[0008]

According to a first aspect of the present invention, there is provided a stator coil insertion method, which comprises a step of inserting a stator coil into a stator core and holding the stator coil in a predetermined posture, and a stator coil. Step of sandwiching both ends of the straight part, guiding and rotating the stator coil to a position corresponding to the desired slot of the stator core, and releasing the stator coil and pushing it into the slot. And the step of performing.

According to a second aspect of the present invention, in the stator coil insertion method according to the first aspect, the rotation and movement are repeated to guide the stator coil to a position corresponding to a desired slot of the stator core. It was done like this.

According to a third aspect of the present invention, the stator coil insertion device holds both ends of the straight portion of the stator coil held in a predetermined posture and corresponds to a desired slot of the stator core. Holding means for releasing the stator coil at the position, rotating means for rotating the stator coil at an angle corresponding to the angle at which the desired slot is formed, and moving the stator coil to a position corresponding to the desired slot. The moving means and the pushing means for pushing the stator coil into the desired slot at a position corresponding to the desired slot are provided.

According to a fourth aspect of the present invention, in the stator coil inserting apparatus according to the third aspect, the holding means is provided so as to have a tapered portion on one side and to be movable so as to face each other in the holding direction. A pair of gripping pieces, and a gripping wedge piece that has a taper portion that engages with the taper portion of both gripping pieces and is movably arranged in a direction perpendicular to the holding direction; And driving means for moving both gripping pieces in the holding direction by advancing and retreating.

According to a fifth aspect of the present invention, in the stator coil insertion device according to the third or fourth aspect, the holding means is engaged with any of the other slots located on both sides of the desired slot. It is provided with a positioning means for positioning by.

The stator coil insertion device according to a sixth aspect of the present invention is the stator coil insertion device according to the third or fourth aspect, in which the clamping means regulates the movement of the stator coil in the clamping direction when the stator coil is released. It is equipped with means.

According to a seventh aspect of the present invention, in the stator coil inserting apparatus according to the third aspect, a reaction force receiving means for receiving a pushing reaction force acting on the pushing means at the time of pushing the stator coil is provided. Is.

According to an eighth aspect of the present invention, in the stator coil insertion device according to the seventh aspect, a bridge is formed between the pushing means and the inner surface of the stator core opposite to the desired slot. It is composed of a biased cylinder.

According to a ninth aspect of the present invention, there is provided the stator coil insertion device according to the seventh or eighth aspect, wherein the reaction force receiving means is detachable.

According to a tenth aspect of the present invention, in the stator coil inserting apparatus according to the third aspect, the rotating means is constituted by a step motor which rotates by an angle corresponding to the pitch of the slots of the stator core. Is.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a front view showing a state in which a stator coil insertion device according to Embodiment 1 of the present invention is mounted on a stator frame, FIG. 2 is a plan view showing a state in FIG. 1, and FIG. 3 is a stator in FIG. It is a front view which expands and shows the structure of the insertion apparatus of a coil. In the figure, 6 is a stator frame, 7 is a stator core installed in the stator frame 6, and 8 is a pair of stator coil insertion devices attached to both ends of the stator frame 6.

The insertion device 8 is, as shown in FIG.
Clamping means 9 for clamping the end portion of the linear portion of the stator coil (not shown) and releasing it at a position corresponding to the desired slot,
Rotating means 10 for rotating the stator coil at an angle corresponding to the angle at which the desired slot is formed, and moving means 1 for moving the stator coil to a position corresponding to the desired slot.
1 and pushing means 12 for pushing the stator coil into the desired slot at a position corresponding to the desired slot. 1 and 2, the insertion device 8 attached on the left side of the drawing shows the insertion operation state, and the insertion device 8 on the right side shows the standby state.

Next, details of the insertion device 8 configured as described above will be described with reference to the drawings. 4 and 5 are a front view and a plan view, respectively, showing in detail the configuration of the main part of the insertion device 8, FIG. 6 is a cross-sectional view showing a cross section taken along line VI-VI in FIG. 4, and FIG. 7 is a line in FIG. VII-V
It is sectional drawing which shows the cross section along II. In FIGS. 4 and 5, 13 is a stator coil, which is not shown in the drawings but has a straight portion 13a and bent portions 13b at both ends thereof.

First, the structure of the holding means 9 will be described with reference to FIG. In the figure, 14 is a base plate and 15 is this base plate 1.
A frame body which is provided upright on both sides of 4 and 16 is a frame body 1
5 is a wedge piece for grasping which is formed in a substantially U shape so as to be slidable up and down along the inner surface of 5, and has tapered portions 16 on both end surfaces, respectively.
a and 16a are formed. Reference numeral 17 denotes a cylinder as a drive means fixed to the lower surface of the base plate 14 and having a tip end of a shaft 17a connected to the lower portion of the gripping wedge piece 16, and 18 and 19 denote taper portions 16a, 16a of the gripping wedge piece 16 on the lower surface. Tapered portions 18a and 19a that are respectively engaged with the gripping wedge piece 16 are a pair of gripping pieces that are combined with a dovetail groove, and are formed on the frame body 15 in a direction to sandwich the linear portion 13a of the stator coil 13. It is arranged slidably along. Reference numeral 20 denotes a pair of engaging pieces as positioning means for positioning the sandwiching means 9 by being provided at the tips of the respective frame bodies 15 and 15 and engaging with other slots located on both sides of the desired slot. Is.

Next, the holding means 9 constructed as described above.
Will be described. First, when the cylinder 17 is operated and the shaft 17a is retracted as shown in FIG. 6 (A), the grasping wedge piece 16 slides along the frame body 15 and descends. By this descending operation, the gripping wedge pieces 16 and the gripping pieces 18 and 19 combined by the dovetail groove are respectively tapered portions 18a and 1a.
9a, the tapered portions 16a, 16 of the wedge piece 16 for gripping
It moves in the direction away from the linear portion 13a of the stator coil 13 along a, and is in the released state. On the other hand, when the cylinder 17 is operated to push up the shaft 17a as shown in FIG. 6 (B), the grasping wedge piece 16 slides along the frame body 15 and ascends. By this ascending operation, both gripping pieces 18, 19 are straightened through the taper portions 18a, 19a along the taper portions 16a, 16a of the gripping wedge piece 16 and the linear portion 1 of the stator coil 13 is formed.
It moves in the direction of contacting 3a and is in a clamped state.

Further, adjacent to the holding means 9, a regulating means 21 is provided.
Are arranged as shown in FIG. 4, and as shown in FIG. 7, a pair of guide frames 22 and 23 are provided on both sides of the linear portion 13a of the stator coil 13 with a predetermined gap, and the holding means 19 is in the released state. The linear portion 13a of the stator coil 13 is provided to prevent the linear portion 13a of the stator coil 13 from moving or tilting in the holding direction.

The rotating means 10 is composed of a step motor which rotates by an angle corresponding to the pitch of the slots of the stator core 7, and the frame body to which the holding means 9, the pushing means 12 and the regulating means 21 are attached together. Rotate 24 at the above angle. Further, the moving means 11 is constituted by parallel links as shown in FIG. 3, and is moved in the up-down direction by the drive of the up-down drive motor 25 to move the holding means 9 together with the frame 24 to a predetermined slot position.

Further, as shown in FIG. 4, the push-in means 12 has a cylinder 27 rotatably supported by a support fitting 26 arranged on the frame 24, and another cylinder 27 for rotating the cylinder 27. The cylinder 27 is rotated by the drive of the cylinder 28 to the position shown by the chain line in the figure, and then the cylinder 27
Is driven to fix the pinching means 9 to the released state by the push-in fitting 29 which is fixed to the tip and a rubber material is pasted on the tip, and the linear portion 13a of the stator coil 13 whose position is regulated by the regulating means 21 is desired. Push it into the slit.

A cylinder 30 as a reaction force receiving means is attached to an end portion of the cylinder 27 opposite to the shaft end, and an abutting metal fitting is attached to the end portion of the shaft arranged in the direction opposite to the cylinder 27. When the stator coil 13 is fixed and the stator coil 13 is pushed in, the shaft of the cylinder 30 is projected until the abutment fitting 31 comes into contact with the inner surface of the stator core 7, and the driving force of the cylinder 30 causes the stator coil 13 to be pushed in. Push-in means 12
Subject to indentation pressure.

Next, the operation of the stator coil insertion device according to the first embodiment configured as described above will be described. First, as shown in FIG. 8, both insertion devices 8 are placed in a standby state, and the stator coil 13 is inserted into the stator core 7. Then, the both ends of the linear portion 13a are hung by, for example, a chain block (not shown), and the sleeper 32 installed at a predetermined position.
Place on top of. Next, when the stator coil 13 is placed on the sleeper 32 in this manner, the moving means 11 is operated to guide the holding means 9 to the insertion operation state as shown in FIG. Both gripping pieces 18, 19 as shown
The sandwiching means 9 is set so that is at a position corresponding to the linear portion 13a of the stator coil 13. At this time, both gripping pieces 1
8 and 19 are shafts 1 of the cylinder 17 as shown in FIG.
7a is in the retracted and released state.

Then, as shown in FIG. 11, the holding means 9 is moved to the side of the linear portion 13a of the stator coil 13, and the shaft 17a of the cylinder 17 is projected as shown in FIG. The straight portion 13a is sandwiched between 18 and 19. Then, the rope that bound the end portion of the stator coil 13 for lifting with the chain block was removed, and FIG.
As shown in FIG. 2, a vertical driving motor 2 for both insertion devices 8,
5 and 25 are operated to raise the stator coil 13 slightly, lift it from the sleepers 32, and remove the sleepers 32.

Then, when the sleepers 32 are removed, the holding means 9 is prevented from interfering with other stator coils in which the bent portions are already inserted, and the movement of the moving means 11 prevents the stator core 7 from moving. By moving it along the inner surface to bring it closer to the position corresponding to the desired slot 7a as shown in FIG.
The rotation means 10 is operated to match the angle at which the slot 7a is formed. Then, the moving means 11
To bring the holding means 9 closer to the inner surface side of the stator core 7,
As shown in FIG. 14, both engaging pieces 20, 20 are engaged with the inlet portions of the slots adjacent to both sides of the desired slot 7a.

Next, as shown in FIG. 4, the cylinder 28 of the pushing means 12 is operated to project the shaft so that the axis of the cylinder 27 coincides with the pushing direction as shown by the chain line in FIG. The state is as shown. In this state, the cylinder 30 is operated and the shaft is projected, so that
As shown in FIG. 3, the abutting fitting 31 fixed to the shaft end is brought into contact with the inner peripheral surface of the stator core 7, and the holding means 9 is fixed by being stretched and fixed on the inner surface of the stator core 7 by the driving force of the cylinder 30. The cylinder 17 of the holding means 9 is operated to move the shaft 17
By retracting a, both gripping pieces 18, 19 are released.

At this time, the straight portion 13a of the stator coil 13
Is restricted from moving or tilting in the clamping direction by the guide frames 22 and 23 of the regulating means 12 shown in FIG.
The angle of is maintained as it is when it is clamped. Then, as shown in FIG. 17, the cylinder 27 is operated to project the shaft, and the linear portion 13a of the stator coil 13 is pushed into the desired slot 7a through the push-in fitting 29 fixed to the tip end of the linear portion. When 13a reaches the back of the slot 7a, a temporary support jack (not shown) temporarily supports the stator coil 13 so as not to drop it from the inside of the slot 7a, and the state shown in FIG. 18 is obtained. The reaction force acting on the sandwiching means 9 at the time of pushing is supported by the driving force of the cylinder 30.

Thereafter, the operations reverse to the above steps are carried out,
That is, first, the cylinder 27 is operated to retract the shaft, pull out the push-in fitting 29 from the slot 7a, and
The cylinder 30 is operated to retract the shaft, and the abutment fitting 31 is separated from the inner peripheral surface of the stator core 7. Next, the cylinder 28 is operated to retract the shaft, thereby returning the connected cylinders 27 and 30 to the positions shown by the solid lines in FIG.

Then, both insertion devices 8 and 8 are arranged so as not to obstruct the carrying of the next stator coil into the stator core.
It is returned to the standby position. Finally, a plurality of temporary wedges are driven into the slots 7a into which the stator coils 13 temporarily supported by the temporary support jacks are inserted, and the temporary support jacks are removed to remove one stator coil. The insertion work is completed, and the entire insertion work is completed by performing this work on all the stator coils.

As described above, according to the first embodiment, the linear portion 13a of the stator coil 13 is placed on the sleeper 32 arranged at a predetermined position inside the stator core 7, and the linear portion 13a is placed. Both ends of the are sandwiched by the sandwiching means 9, and the stator coil 13 is guided to a position corresponding to the desired slot 7a by the operation of the rotating means 10 and the moving means 11.
Since the stator coil 13 is pushed into the slot 7a by the pushing means 12, the stator coil 13 is inserted into the slot 7a of the stator core 7 without lifting the stator frame 6 from the foundation of the rotating electric machine. It is possible,
Significant cost reduction is possible.

Embodiment 2 In the first embodiment, after the sleepers 32 are removed, the operation of moving the holding means 9 along the inner surface of the stator core 7 and bringing it closer to the position corresponding to the desired slot 7a (FIG. 12, 13) is not described in detail, but if the holding means 9 is guided by repeating the rotating and moving operations of the rotating means 10 and the moving means 11, it is possible to compare with other stator coils already inserted. The desired slot 7a can be smoothly guided without interference, and the workability can be improved.

Embodiment 3. In the first embodiment, the connection between the cylinder 27 and the cylinder 30 is not described, but if the cylinder 30 is configured to be attachable to and detachable from the cylinder 27, it is suitable according to the inner diameter of the stator core. Since the cylinder 30 having a stroke can be appropriately selected and used, it is possible to improve versatility.

Fourth Embodiment Although not described in the first embodiment, the engaging piece 20 that is attached to the tip of the sandwiching means 9 and engages with the inlet portions of both slots located on both sides of the desired slot 7a is made of resin or the like. If it is made of a material that is softer than the material that forms the stator core 7,
The stator core 7 will not be scratched by the positioning when the stator coil 13 is inserted, and the quality can be guaranteed.

Embodiment 5 Further, in the first embodiment, the case where both the insertion devices 8 and 8 operate in the standby state has been described, but since the fixed coil 13 may be inserted from either side, the insertion on the side opposite to the insertion side may be performed. Insertion device 8
Needless to say, it is not necessary to operate in the standby state, and it may be configured to always maintain the operating state, and the same effect as that of the first embodiment can be exhibited.

[0039]

As described above, according to the first aspect of the present invention, the step of inserting the stator coil into the stator core and holding it in a predetermined posture, and the both ends of the straight portion of the stator coil. It includes a step of sandwiching the portion, a step of guiding the stator coil to a position corresponding to a desired slot by rotating and moving the stator coil, and a step of releasing the stator coil and pushing it into the slot. Therefore, the stator coil can be inserted into the slot of the stator core without lifting the stator frame from the foundation of the rotating electric machine, and a stator coil insertion method capable of significantly reducing cost can be provided. it can.

According to claim 2 of the present invention, in claim 1, the rotation and movement are repeated to guide the stator coil to a position corresponding to a desired slot of the stator core. It is possible to provide a method of inserting a stator coil that can improve workability as well as the reduction of the number.

Further, according to claim 3 of the present invention, both ends of the straight portion of the stator coil held in a predetermined posture are sandwiched and the stator coil is positioned at a position corresponding to a desired slot of the stator core. And a rotating means for rotating the stator coil to an angle corresponding to the angle in which the desired slot is formed, a moving means for moving the stator coil to a position corresponding to the desired slot, and a desired means. Since the push-in means for pushing the stator coil into the desired slot at the position corresponding to the slot is provided, the stator coil is inserted into the slot of the stator core without lifting the stator frame from the foundation of the rotating electric machine. Therefore, it is possible to provide the stator coil insertion device capable of significantly reducing the cost.

According to a fourth aspect of the present invention, in the third aspect, the holding means has a tapered portion on one side, and the pair of gripping pieces are arranged so as to be opposed to each other in the holding direction. When,
A gripping wedge piece that has taper portions that respectively engage with the taper portions of both gripping pieces and is arranged so as to be movable in the direction perpendicular to the clamping direction, and both gripping pieces by advancing and retracting the gripping wedge pieces in the perpendicular direction. Since it is configured with a drive means that moves the stator in the clamping direction, the stator coil can be inserted into the slot of the stator core without lifting the stator frame from the foundation of the rotating electric machine, and the cost can be significantly reduced. A stator coil insertion device can be provided.

Further, according to claim 5 of the present invention, in claim 3 or 4, the positioning means for performing positioning by engaging the holding means with any of the other slots located on both sides of the desired slot. Since it is provided with the above, it is possible to provide a stator coil insertion device capable of not only reducing the cost but also improving workability.

According to claim 6 of the present invention, in claim 3 or 4, the clamping means is provided with a restriction means for restricting the movement of the stator coil in the clamping direction when the stator coil is released. It is possible to provide a stator coil insertion device capable of improving workability as well as cost reduction.

Further, according to claim 7 of the present invention, in claim 3, since the reaction force receiving means for receiving the pushing reaction force acting on the pushing means at the time of pushing the stator coil is provided, the cost can be reduced. Of course, it is possible to provide a stator coil insertion device capable of improving workability.

According to an eighth aspect of the present invention, in the cylinder according to the seventh aspect, the cylinder is bridged and urged between the pushing means and the inner surface of the stator core opposite to the desired slot. Since it is configured, it is possible to provide a stator coil insertion device that can reduce the cost as well as improve workability with a simple configuration.

According to the ninth aspect of the present invention, since the reaction force receiving means is detachable in the seventh or eighth aspect, the cost can be reduced as well as the simple structure. It is possible to provide a stator coil insertion device capable of improving workability.

According to the tenth aspect of the present invention, in the third aspect, since the rotating means is constituted by the step motor which rotates by an angle corresponding to the pitch of the slots of the stator core, the cost can be reduced. Of course,
It is possible to provide a stator coil insertion device capable of improving workability with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a stator coil insertion device according to a first embodiment of the present invention is mounted on a stator frame.

FIG. 2 is a plan view showing a state in FIG.

FIG. 3 is an enlarged front view showing the configuration of the stator coil insertion device in FIG. 1.

FIG. 4 is a front view showing in detail the configuration of the main part of the insertion device in FIG.

5 is a plan view showing in detail the configuration of the main part of the insertion device in FIG. 1. FIG.

6 is a cross-sectional view showing a cross section taken along line VI-VI in FIG.

7 is a cross-sectional view showing a cross section taken along line VII-VII in FIG.

FIG. 8 is a front view showing a case where the insertion device in FIG. 1 is in a standby state.

FIG. 9 is a front view showing a case where the insertion device in FIG. 1 is in an operating state.

FIG. 10 is a cross-sectional view showing an operating state of the sandwiching means in one step of the stator coil insertion work.

FIG. 11 is a sectional view showing an operating state of the sandwiching means in one step of the stator coil insertion work.

FIG. 12 is a cross-sectional view showing an operating state of the sandwiching means in one step of the stator coil insertion work.

FIG. 13 is a cross-sectional view showing an operating state of the sandwiching means in one step of the stator coil insertion work.

FIG. 14 is a cross-sectional view showing an operating state of the sandwiching means in one step of the stator coil insertion work.

FIG. 15 is a cross-sectional view showing the operating states of the holding means, the pushing means, and the reaction force receiving means in one step of the stator coil insertion work.

FIG. 16 is a cross-sectional view showing the operating states of the holding means, the pushing means, and the reaction force receiving means in one step of the stator coil insertion work.

FIG. 17 is a cross-sectional view showing the operating states of the holding means, the pushing means, and the reaction force receiving means in one step of the stator coil insertion work.

18 is a plan view showing a state at the end of the insertion work of the insertion device in FIG. 1. FIG.

FIG. 19 is a front view showing a configuration of a conventional stator coil insertion device.

20 is a side view showing the configuration of the insertion device in FIG.

[Explanation of symbols]

6 stator frame, 7 stator core, 8 insertion device,
9 clamping means, 10 rotating means, 11 moving means, 12
Push-in means, 13 stator coil, 13a straight part, 1
3b Bent portion, 16 Wedge piece for grasping, 16a, 18a, 1
9a taper portion, 18, 19 gripping piece, 20 engaging piece,
21 restriction means, 22, 23 guide frame, 25 vertical drive motor, 27, 28, 30 cylinder, 31 contact metal fittings, 32 sleepers.

Front page continuation (72) Inventor Tadashi Yanagihara 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd. (72) Inventor Yasuhiro Nomoto 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd. In-house (72) Inventor Ryomasa Okazaki 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd.

Claims (10)

[Claims] 1. A step of inserting a stator coil into a stator core to hold it in a predetermined posture, a step of sandwiching both ends of a straight portion of the stator coil, and a step of rotating the stator coil. A stator coil characterized by including a step of guiding the stator core to a position corresponding to a desired slot by moving it, and a step of releasing the stator coil and pushing it into the slot. Insertion method. 2. The method for inserting a stator coil according to claim 1, wherein the stator coil is guided to a position corresponding to a desired slot of the stator core by repeating rotation and movement. 3. A holding means for holding both ends of a straight portion of a stator coil held in a predetermined posture and releasing the stator coil at a position corresponding to a desired slot of the stator core, and the fixing means. Rotating means for rotating the child coil to an angle corresponding to the angle at which the desired slot is formed, moving means for moving the stator coil to a position corresponding to the desired slot, and position corresponding to the desired slot. And a pushing-in means for pushing the stator coil into the desired slot. 4. The gripping means has a pair of gripping pieces that have a tapered portion on one side and are movably disposed so as to face each other in the gripping direction, and a taper that engages with the tapered portions of the gripping pieces. A gripping wedge piece having a portion movably arranged in a direction perpendicular to the sandwiching direction, and a drive for moving the gripping pieces in the sandwiching direction by advancing and retracting the gripping wedge piece in the orthogonal direction. The stator coil insertion device according to claim 3, wherein the stator coil insertion device comprises: 5. The fixing according to claim 3, wherein the holding means includes positioning means for performing positioning by engaging with any of the other slots located on both sides of the desired slot. Child coil insertion device. 6. The insertion of a stator coil according to claim 3, wherein the holding means includes a limiting means for controlling the movement of the stator coil in the holding direction when the stator coil is released. apparatus. 7. An apparatus for inserting a stator coil according to claim 3, further comprising reaction force receiving means for receiving a pushing reaction force acting on the pushing means when the stator coil is pushed. 8. The reaction force receiving means is composed of a cylinder that is bridged and urged between the pushing-in means and the inner surface of the stator core on the side opposite to the desired slot. The stator coil insertion device according to claim 7. 9. The apparatus for inserting a stator coil according to claim 7, wherein the reaction force receiving means is removable. 10. The stator coil insertion device according to claim 3, wherein the rotating means is a step motor that rotates by an angle corresponding to the pitch of the slots of the stator core.