JPH0732575B2 - Device to insert coil and wedge into slot of magnetic core - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention is to install a slot liner in a slot of a magnetic iron core of a rotating electric machine, and then insert a coil pre-wound and a pre-formed wedge into the slot liner. In particular, the present invention relates to a device for inserting a coil and a wedge into a slot of a suitable magnetic iron core of a rotating electric machine having a high conductor space factor in the slot.

BACKGROUND OF THE INVENTION Generally, in a rotary electric machine, as shown in FIG.
A slot 3 is formed between the tooth portions 2 that are adjacent to each other in the circumferential direction, and a slot liner 5 is installed in the slot 3 in advance, and a coil 7 prewound therein and a preformed wedge 8 are formed. Has been inserted.

For the slot liner 5, for example, a synthetic resin film such as a polyester film having a thickness of 0.25 mm is cut into a required length, and the end portion is bent. In the conventional slot liner 5, as shown in FIG. The part 6 is formed, and U-bending processing is performed and it is shape | molded.

Further, the wedge 8 is formed by cutting a synthetic resin film such as a polyester film having a thickness of 0.25 mm to 0.36 mm to a required size and bending it into a substantially shape so that the wedge 8 is inserted into the slot 3 at the same time. It has become.

Furthermore, the conventional device for inserting the coil and the wedge is the third one.
As shown in the figure, a housing 10, a blade 11, a blade holder 12, a stripper 13 for inserting a coil, a rod 14 connected to a driving means such as a fluid pressure cylinder and connecting the stripper 13 via a bolt 15. And the wedge guide
16 and a wedge pusher 17 and the like connected to a driving means (not shown) such as a fluid pressure cylinder and arranged between the wedge guides 16. As shown in FIG. 4 (a sectional view taken along the line IV-IV in FIG. 3), the blades 11 are annularly arranged in plurality at intervals corresponding to the openings of the slots 3. As shown in FIGS. 3 and 4, the wedge guides 16 are fitted to the outside of the blade 11 and arranged in a plurality of rings.

Then, in this conventional device, while the stripper 13 is moved to the retracted position on the base side of the blade 11, the pre-wound coil 7 is sandwiched at a predetermined position between the blades 11 adjacent in the circumferential direction, Wedge guides 16 that are adjacent to each other in the circumferential direction
The wedge 8 is clamped at a predetermined position in between. Next, the magnetic core 1 having the slot liner 5 mounted in the slot 3 in advance is fitted to the outside of the ring of the blade 11 and the tooth portion 2 is attached to the blade.
It is moved along the outer surface of 11 to a position where it comes into contact with the tip of the wedge guide 16, and is fixed at this position by a stator positioning device (not shown). Then, the rod 14 is actuated in the forward direction through the driving means, the stripper 13 is advanced into the ring of the blade 11, and the coil 7 held by the blade 11 is inserted into the slot liner 5 in the slot 3 of the magnetic core 1. At the same time, the wedge pusher 17 is advanced through the driving means, and the wedge 8 held by the wedge guide 16 is inserted inside the slot liner 5 toward the opening 4 side of the slot 3.

By the way, in the conventionally used slot liner 5, since the cuff portion 6 is not in close contact with the liner body, the cuff portion 6 falls down to the outside of the side wall of the slot 3 and is adjacent to it due to spring back as shown in FIG. A state in which the spaces between the slots 3 are closed, and accordingly, the lower end portion 5'exposed from the slots 3 of the magnetic core 1 in the slot liner 5 is exposed.
Are wider than the width of the slot 3.

In this connection, the behaviors of the coil 7 and the wedge 8 during the insertion process of the coil 7 and the wedge 8 are as follows.

(1) At a position before the coil 7 and the wedge 8 enter the lower end portion 5'of the slot liner 5, as shown in FIG.
Of the wedge guides 16, that is, the wedges 8 are sized so that they can be inserted into the slot liners 5 mounted in the slots 3.

(2) At the position where the coil 7 and the wedge 8 enter the lower end portion 5 ′ of the slot liner 5, as shown in FIG. 5 (cross-sectional view taken along line VV of FIG. 3), the slot 3 of the coil 7 is The bottom side is restricted to the shape along the slot 3, but the opening 4 side of the slot 3 in the coil 7 is outside the side wall of the slot 3 due to the lower end 5 ′ of the slot liner 5 falling as described above. It becomes a swelled shape. On the other hand, the wedge 8 is slid by the lower end portion 5 ′ of the slot liner 5 and the bulge of the coil 7, so that the wedge 8 is
The sides 9 of the slot are open to the outside of the side wall of the slot 3.

(3) When the coil 7 and the wedge 8 are traveling in the slot 3, as shown in FIG. 6 (a sectional view taken along the line VI-VI in FIG. 3), the coil 7 and the wedge 8 are in the slot 3
And the shape is regulated by the stripper 13. Therefore, when the coil 7 and the wedge 8 enter the slot 3, the bulged portion of the coil 7 and the open side portion 9 of the wedge 8 are pushed in the state of being narrowed to the shape of the slot 3. As a result, the insertion resistance between the coil 7 and the wedge 8 increases.

On the other hand, in recent years, rotating electric machines have tended to increase the conductor space factor SF in the slot from the standpoints of saving energy by increasing efficiency, saving resources by reducing size and weight, and reducing costs. The conductor space factor SF in the slot is obtained by the following equation.

Here, S: cross-sectional area of slot S1: cross-sectional area of slot liner Sw: cross-sectional area of wedge D: maximum outer diameter of conductor N: number of conductors.

However, in the technique of inserting the coil 7 and the wedge 8 as described above, there are some differences depending on the specifications of the rotating electric machine,
When the conductor space factor SF in the slot exceeds about 60%, the following problems occur, resulting in deterioration of productivity and quality.

(1) The insertion resistance of the coil 7 and the wedge 8 in the slot 3 increases. However, the wedge 8 is a flexible material made of synthetic resin ferm as described above, and after the side portion 9 spreads at the position of the lower end portion 5'of the slot liner 5, it is squeezed and pushed. As shown in FIG. 5, the wedge 8 may be bent and inserted in the insertion direction, and the wedge 8 may be deformed or damaged.

(2) At the position where the slot liner 5 comes into contact with the edge formed by the end surface of the magnetic core 1 and the wall surface of the slot 3, the load due to the insertion of the coil 7 and the wedge 8 is concentrated, so that the slot liner 5 Is severely damaged, resulting in poor insulation. Further, the periphery of the slot 3 on the end surface of the magnetic core 1 may be deformed or damaged.

(3) A part of the conductor forming the coil 7 may spill outside the wedge 8.

This occurs remarkably in a coil having a large coil pitch, for example, a two-pole stator coil. As a result, work such as rework is required.

Therefore, among the problems of the conventional insertion technique, a cuff supporter is provided along the cuff portion 6 of the slot liner 5 or the wedge guide 16 is mainly used as a measure against the above (2).
Protrusions are provided at the tip of the cuff supporter and the protrusions are arranged between the slots 3 which are adjacent to each other in the circumferential direction, and the load due to the insertion of the coil 7 and the wedge 8 is applied to the tip of the cuff supporter or the wedge guide 16. By sharing the load, the load acting on the portion of the ridge around the slot 3 is reduced.

However, when the conventional slot liner 5 in which the cuff portion 6 is not closely attached to the liner body is used, as described above, the lower end portion 5'of the slot liner 5 and the cuff portion 6 are
It is not possible to completely prevent the falling of the outside of the side wall of the slot 3, so that the coil 7 swells and the side portion 9 of the wedge 8 spreads, so that the cuff portion 6 and the side wall 9 of the wedge 8 are formed.
It was not possible to sufficiently prevent damage to the edge portion around the slot 3 due to the above.

Further, the lower end portion 5'of the slot liner 5 and the cuff portion 6 are
In order to correct the fall of the cuff supporter along the side wall of the slot 3, or as shown in FIG. 8, a protrusion 18 is provided at the tip of the wedge guide 16, and the cuff supporter or protrusion 18 is circumferentially arranged. When it is arranged between the adjacent slots 3, as shown in FIG. 8, the cuff portion 6 which has fallen outside the side wall of the slot 3 is pushed inward,
As a result, the width of the lower end portion 5'of the slot liner 5 is narrowed, and the insertion resistance between the coil 7 and the wedge 8 is further increased, the cuff portion 6 is disengaged from the side wall of the slot 3, and the slot liner 5 is inserted into the slot 3 Is pulled in,
There was a problem that the coil 7 and the wedge 8 could not be smoothly inserted into the slot.

[Object of the Invention] In view of the problems of the prior art, an object of the present invention is to allow a coil in a slot and a wedge to be smoothly inserted with a simple configuration even in a rotary electric machine having a high conductor space factor in a slot. Moreover, it is possible to prevent deformation and damage around the wedge, the slot liner, and the slot of the magnetic core, and to prevent a part of the coil from spilling out of the wedge, thereby providing a device for inserting the coil and the wedge into the slot of the magnetic core. To do.

[Summary of the Invention] According to the present invention, a plurality of magnetic cores, each of which has an axis centered vertically, are inserted through the inside of the magnetic core and are annularly arranged corresponding to the teeth forming each slot opening of the magnetic core. Blade of the
A stripper, which is slidably held along the blade in the ring of the blade, can insert a coil into the slot of the magnetic core, a plurality of wedge guides annularly arranged on the outer peripheral side of the blade, and the wedges. A wedge pusher that is slidably mounted vertically between the guides and that allows the wedge to be inserted and arranged in the opening of the slot of the magnetic iron core is inserted in the slot along the axial direction and the liner. A device for inserting a coil and a wedge into a slot of a magnetic iron core having a slot liner in which a cuff portion is brought into close contact with at least a lower end portion exposed from a slot of a main body, wherein the magnetic iron core is provided at a tip portion of each wedge guide. The guide piece with a shape corresponding to both side surfaces of the tooth part that forms the slot opening of Along forming, upon insertion of coils and wedges into the slots of the magnetic core fitted with a slot liner, and a guide piece adjacent thereto and guide piece,
Both edges of the lower end of the slot liner are regulated along both side surfaces of the slot tooth portion, and the wedge is guided through the both edges of the slot liner. Was achieved.

Embodiments of the Invention Embodiments of the present invention will be described below with reference to the drawings. 9 and 13 show an embodiment of the device for inserting the coil and the wedge into the slot of the magnetic core according to the present invention.

As shown in FIG. 9, the magnetic core handled by the coil and wedge inserting device of the embodiment has a slot liner 19 in a slot 3 formed between teeth 2 circumferentially adjacent to each other as shown in FIG. Is installed in advance. The slot liner 19 is formed by cutting a synthetic resin film into a required shape and size, bending the cuffs 20 at both ends thereof, and then performing a U-bending process to form each slot 3 of the magnetic core 1. It is installed by inserting it along the axial direction. At that time, the slot liner 19 has upper and lower end portions as both ends in the longitudinal direction exposed from the slot 3.
At least the ends of the coil 7 and the wedge 8 in the insertion direction,
That is, the cuff portion 20 of the lower end portion 19 'is, as shown in FIG.
It is formed only on the bottom of the liner body, and is adhered to the liner body preferably by adhesion or welding so that it can be caught on the side wall of the slot 3.

On the other hand, the inserting device of the embodiment, as shown in FIG. 10, a housing 10, a blade 11, a blade holder 12, a stripper 13 for inserting a coil, a rod 14 for operating the same, a wedge guide 16, and a wedge pusher. It has 17 mag.

The plurality of blades 11 are annularly arranged at intervals corresponding to the openings 4 of the slots 3 in the circumferential direction. Further, the end of the blade 11 on the root side is fixed to the blade holder 12.

The stripper 13 is arranged in the ring of the blade 11 and is connected to a rod 14 via a bolt 15, and the rod 14 is connected to a driving means (not shown) such as a fluid pressure cylinder. This causes the stripper 13 to move to the blade 11
To be slidable along.

A plurality of the wedge guides 16 are annularly arranged outside the blade 11 and are fixed to the housing 10 of the apparatus.

The wedge pusher 17 is arranged between the wedge guides 16 adjacent to each other in the circumferential direction, and is connected to a driving means (not shown) such as a fluid pressure cylinder so that the wedge pusher 17 can slide along the wedge guide 16. Has become.

A guide piece 21 is provided at the tip of each wedge guide 16. That is, the guide piece 21
As shown in FIG. 10, the top surface of each wedge guide 16 is extended so that it can contact the bottom surface of the magnetic core 1. Further, as shown in FIG. 12 (cross-sectional view taken along the line XII-XII in FIG. 10), this guide piece 21 is slidably fitted to the outer surface of the blade 11 via the groove 22 like the wedge guides 16. The magnetic core 1 has a shape corresponding to both side surface portions of the tooth portion 2 forming the opening portion 4 of the slot 3 of the magnetic core 1. And when inserting the coil 7 and the wedge 8,
Guide piece 21 and guide piece 21 adjacent to this,
Both side edge portions of a lower end portion 19 'of the slot liner 19 exposed from the slot 3 of the magnetic iron core 1 are regulated so as to have a shape along both side surface portions of the tooth portion 2, and the wedge 8 and the wedge 8 and The insertion of the coil 7 can be guided.

In order to insert the coil 7 and the wedge 8 into the slot 3 of the magnetic core 1 by the apparatus of the above-mentioned embodiment, the stripper 13 is moved to the retracted position on the base side of the blade 11.

Then, the pre-wound coil 7 is sandwiched between the circumferentially adjacent blades 11 at the determined position, and the wedge 8 is sandwiched between the circumferentially adjacent wedge guides 16 at the determined position. .

In addition, a slot liner 19 in which at least the cuffs 20 at the ends on the insertion direction side of the coil 7 and the wedge 8 are closely attached to the liner body is installed in the slot 3 of the magnetic core 1, and the magnetic core 1 is attached to the blade 11. The stator is fitted to the outside of the ring, and the tooth portion 2 is moved along the outer surface of the blade 11 to a position where it abuts on the upper surface of the guide piece 21, and at this position, the magnetic core 1 is aligned so that its axis extends vertically. It is held by a positioning device (not shown).

Next, the rod 14 is actuated in the forward direction through the driving means, the stripper 13 is advanced into the ring of the blade 11, and the coil 7 sandwiched by the blade 11 is inserted into the slot 3 of the magnetic core 1. At the same time as inserting the wedge pusher 17 into the liner 19 through the driving means, the wedge 8 held by the wedge guide 16 is inserted into the slot liner 19 and the opening side 4 of the slot 3 is inserted.
To insert.

After inserting the coil 7 and the wedge 8 into the slot liner 19 installed in the slot 3 of the magnetic core 1, the stator positioning device is operated in the direction of releasing the magnetic core 1 to move the magnetic core 1 to the ring of the blade 11. And then complete one stroke.

The behavior of the coil 7 and the wedge 8 during the insertion process is
It looks like this:

(I) At the position before the coil 7 and the wedge 8 have entered the lower end portion 19 'of the slot liner 19, FIG.
As shown in the sectional view taken along the line XI-XI in the figure), the coil 7 swells more than the gap between the wedge guides 16 that are adjacent to each other in the circumferential direction, and the wedge 8 has the width of the slot liner 19 defined between the wedge guides 16. It is regulated.

(Ii) At the position where the coil 7 and the wedge 8 enter the lower end portion 19 'of the slot liner 19, the slot liner 19
The cuff part 20 of the
Of the slot liner 19 does not spread, and the bottom end of the slot liner 19 does not spread, and the slot liner 19 does not spread.
As shown in the line sectional view), the slot liner 19 is formed by the guide piece 21 extending from the tip of the wedge guide 16.
Since both side edge portions of the lower end portion 19 ′ of the slot opening portion 4 side are regulated along the both side surface portions of the slot tooth portion 2, the wedge 8 and the coil 7 are guided along the guide piece 21.

(Iii) FIG. 13 (XIII-XIII in FIG. 10) in the state where the coil 7 and the wedge 8 are traveling in the slot 3.
As shown in the sectional view (line cross-section), the coil 7 and the wedge 8 are still regulated by the slot 3 and the stripper 13, so that they can be smoothly inserted into the slot 3 as they are.

As described above, it is possible to prevent the lower end portion 19 'of the slot liner 19 from expanding due to the fall of the cuff 20 of the slot liner 19, and the bulge of the coil 7 and the wedge 8 of the wedge 8 due to the spreading of the lower end portion 19' of the slot liner 19. Since the side portion 9 can be prevented from opening outward, the insertion resistance of the coil 7 and the wedge 8 can be significantly reduced.

Therefore, the coil 7 and the wedge 8 can be smoothly inserted into the slot 3 of the magnetic iron core 1 even in the case of a rotary electric machine having a high conductor space factor SF in the slot.

As a result, the coil 7 can be prevented from being damaged, and the trouble of the wedge 8 being deformed or damaged can be eliminated. Further, the load due to the insertion of the coil 7 and the wedge 8 is received by the guide piece 21, so that it is concentrated on the edge portion formed by the end face of the magnetic core 1 and the side wall of the slot 3 as in the prior art. Since this is not the case, problems such as damage and deformation of the magnetic iron core 1, damage to the slot liner 19, and escape can be eliminated. Further, it is possible to eliminate the problem that a part of the conductor forming the coil 7 spills to the outside of the wedge 8.

The shape of the slot liner handled by the above-mentioned device is not limited to that shown in FIG. 9, and may be various shapes described below. That is, FIG. 14 shows slot 3
It shows another shape of the slot liner attached to
In this case, the slot liner 23 is configured by integrally attaching a band-shaped cuff portion 24 formed separately from the liner body to the claw portion 23 'side of the liner body by adhesion or welding.
Also in this slot liner 23, the coil 7 and the wedge 8 can be inserted by the device shown in FIG.

Further, FIG. 15 shows still another shape of the slot liner, and FIG. 16 shows a guide piece applied to this. The slot liner 25 shown in FIG. 15 is formed by forming the cuff portion 26 separately from the liner body and in a band shape, and integrally attaching the cuff portion 26 from the bottom of the liner body to the middle of the side wall by adhesion or welding. Has been done. Therefore, as the guide piece 27 shown in FIG. 16, the outer side portion of the cuff portion 26 is restrained from the lower end portion of the slot liner 25, and both side edge portions of the slot liner 25 are regulated in a shape along both side surface portions of the slot tooth portion 2. It is supposed to do. The structure of the guide piece 27 is basically the same as that shown in FIG. 10 and FIG.

Figures 17 and 18 show yet another alternative shape for the slot liner. The slot liner shown in Fig. 17
28, the cuff portion 29 is formed separately from the liner body in a band shape, and the cuff portion 29 is integrally attached to the entire outer circumference from the bottom portion to the end portion of the liner body by adhesion or welding. And, the guide piece 30 shown in FIG.
The outside of the end of the cuff 29 of the slot liner 28 is restrained, and both side edges of the slot liner 28 are regulated to a shape along both side surfaces of the tooth 2. Note that other configurations of the guide piece 30 are shown in FIG. 10 and FIG.
It is basically the same as that shown in FIG.

Next, FIGS. 19 to 22 are various examples of guide pieces formed at the tip of the wedge guide, and those shown in FIG. 19 are fitted to the tip of the wedge guide 34 on the outer surface of the blade 11. A guide piece 36 is formed leaving the guide 35.

Further, in the structure shown in FIG. 20, only the guide piece 36 is formed at the tip of the wedge guide 34.

Further, in the one shown in FIG. 21, a guide piece 36 is formed at the tip of the wedge guide 34 leaving the guide 35, and the outer surface of this guide piece 36 is formed as a slope 37, and the top of the guide piece 36 is formed. A chamfer 38 is provided at the corner between the face and the side face. In the guide piece 36 of this embodiment, as shown in FIG.
Slot liners 19, 23, 28 of the shape shown in Figures 14 and 17
When the multi-layer coil is inserted into one slot by dividing it into two or more times, damage to the coil and the slot liner can be prevented when the magnetic core is attached and detached.

In the guide piece 36 shown in FIG. 22, the cutout 39 for receiving the end of the cuff portion 26 is formed so that it can be applied to the slot liner 25 having the shape shown in FIG. It is similar to that shown in FIG.

The various guide pieces shown in these figures can basically obtain the same effects as those shown in FIGS. 10 and 12 described above.

In the above embodiments, the guide pieces are formed integrally with the wedge guides, but they may be formed separately and have the following coupling structure.

(A) One of a coupling groove and a protrusion is formed on the tip end portion of the wedge guide, and the other is formed on the guide piece,
It may be coupled to the wedge guide through the engagement of the groove and the protrusion.

(B) A guide piece may be joined to the tip end portion of the wedge guide by a fastener such as a pin or a bolt.

(C) A guide piece may be joined to the tip end portion of the wedge guide by welding or adhesion.

(D) The guide piece may be formed of a magnet so as to be attracted to and fixed to the tip end portion of the wedge guide.

(E) One of a coupling groove and a protrusion may be formed on the outer surface of the blade 11, the other may be formed on the guide piece, and the blade may be coupled to the blade 11 through engagement of the groove and the protrusion.

(F) A guide piece may be brought into contact with the outer surface of the blade 11 and joined by a fastener such as a pin or a bolt.

(G) A guide piece may be joined to the outer surface of the blade 11 by welding or adhesion.

[Effects of the Invention] According to the present invention described above, the tip end portion of the wedge guide has a shape corresponding to both side surface portions of the tooth portion forming the slot opening of the magnetic iron core, and the upper surface abuts the bottom surface of the magnetic iron core. When the guide piece is formed and the coil and wedge are inserted into the slot, the guide piece regulates both side edges at the lower end exposed from the magnetic iron core of the slot liner along both side surface portions of the slot tooth portion, and Since the wedge is configured to be guided through the both side edge portions, even a rotating electric machine having a high conductor space factor in the slot can smoothly insert the coil and the wedge into the slot by adding a simple configuration. Moreover, it is possible to reliably prevent the wedge, the slot liner, and the coil from being deformed or damaged, and a part of the coil is As a result of being prevented from spilling outward, there is an effect that reliability as an insertion device can be surely enhanced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a slot liner, a coil and a wedge inserted in a slot of a magnetic core, FIG. 2 is a perspective view of a prior art in which a slot liner is mounted in the slot, and FIG. 3 is a coil in the slot. And FIG. 5, FIG. 6 and FIG. 6 are cross-sectional views taken along line IV-IV, V-V and VI-VI in FIG. 3, and FIG. FIG. 8 is a perspective view showing a state in which the wedge is folded in the insertion direction in the apparatus, and FIG. 8 is a view showing insertion of a coil and a wedge when a conventional slot liner is used and the slot liner is restricted by a protrusion provided on a wedge guide. It is a cross-sectional top view of the initial stage. 9 to 13 show an embodiment of an apparatus for inserting a coil and a wedge into a slot of a magnetic core according to the present invention, and FIG. 9 shows a slot liner mounted in the slot of the magnetic core handled by the apparatus. Fig. 10 is a perspective view of the state, Fig. 10 is a vertical sectional front view showing a device for inserting the coil and the wedge into the slot, and Figs. 11, 12, and 13 are XI-XI of Fig. 10.
Line, XII-XII line and XIII-XIII line sectional view, FIG. 14 is a perspective view showing another shape of the slot liner, FIG. 15 is a perspective view showing still another shape of the slot liner, and FIG. 15
FIG. 17 is a cross-sectional plan view of the use state of the guide piece applied to the slot liner shown in FIG. 17, FIG. 17 is a perspective view showing still another shape of the slot liner, and FIG. 18 is a guide applied to the slot liner shown in FIG. FIGS. 19 to 22 are cross-sectional plan views of the use state of the piece, and FIGS. 19 to 22 are perspective views showing various examples of the guide piece. 1 ... magnetic iron core, 2 ... magnetic iron core teeth, 3 ... slot, 4 ... slot opening, 7 ... coil, 8 ... wedge, 9 ... wedge side, 10 ... coil And wedge housing device housing, 11 …… blades, 13…
Stripper, 16,34 Wedge guide, 17 Wedge pusher, 19 Slot slot liner, 19 '...... Lower end exposed from magnetic core in slot liner, 20, 24,
26,29 …… Cuffs, 21,27,30,36 …… Guide piece, 2
3,25,28 …… Slot liner.

Claims (1)

[Claims] 1. A plurality of blades, which are arranged in an annular shape so as to pass through the inside of a magnetic core whose axial center is held vertically and which correspond to the teeth forming the openings of each slot of the magnetic core. A stripper that is slidably held along the blade in the ring of the blade and that can insert a coil into the slot of the magnetic core; a plurality of wedge guides that are annularly arranged on the outer peripheral side of the blade; A wedge pusher that is slidably mounted vertically between the wedge guides and that can insert and arrange the wedge into the opening of the slot of the magnetic core; and insert the wedge pusher in the slot along the axial direction. A device for inserting a coil and a wedge into a slot of a magnetic core equipped with a slot liner in which a cuff portion is in close contact with at least a lower end portion exposed from a slot of a liner body, At the tip of the wedge guide, a guide piece is formed along the wedge guide, the guide piece having a shape corresponding to both side surfaces of the tooth portion forming the slot opening of the magnetic iron core, the upper surface of which is in contact with the bottom surface of the magnetic iron core. When inserting the coil and the wedge into the slot of the magnetic core equipped with, the guide piece and the guide piece adjacent thereto, the both side edges at the lower end portion of the slot liner, on both side surfaces of the tooth portion of the magnetic core. A device for inserting a coil and a wedge into a slot of a magnetic iron core, which is configured so as to be regulated along the same and to guide the wedge through the both side surface portions of the slot liner.