JP5999936B2 - Insulating sheet manufacturing method and insulating sheet manufacturing apparatus - Google Patents

Description

  The present invention relates to a technique for insulating adjacent stator windings inserted in a slot of a stator such as an electric motor.

As an electric motor for driving a device (for example, a compressor provided in a refrigerator, an air conditioner, etc., a vehicle, a vehicle-mounted device mounted on the vehicle), a rotor having a permanent magnet and a stator having a stator winding The provided electric motor is used. As a winding method for winding the stator winding, a concentrated winding method in which the stator winding is directly wound around the teeth is known. An electric motor in which a stator winding is wound by a concentrated winding method is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-112861.
With the recent demand for miniaturization and higher performance of electric motors, the occupation ratio of the stator windings in the slots is increasing. In this case, the interval between the stator windings wound around the adjacent teeth (adjacent stator windings inserted into the slots) is reduced, and the adjacent stator windings may come into contact with each other.
In addition, when using a rotor having a permanent magnet, workability is reduced if a method of magnetizing the permanent magnet before inserting the permanent magnet into the magnet insertion hole of the rotor is used as a method of magnetizing the permanent magnet. A magnetizing method is used. The built-in magnetization method is, for example, that a motor using a rotor in which an unmagnetized permanent magnet is inserted into a magnet insertion hole is incorporated in a compressor, and the stator winding of the stator is used as a magnetizing winding. Is a method of magnetizing. In this case, the stator winding may be deformed or moved by the magnetizing current flowing in the stator winding, and the adjacent stator winding inserted in the slot may come into contact.
For this reason, an insulating member (also referred to as “interphase insulating member”) that insulates stator windings (adjacent stator windings inserted into slots) wound around adjacent teeth is used. Patent Document 1 discloses an insulating member formed of a resin having insulating characteristics and having a V-shaped cross section.

JP 2004-112861 A

Since the conventional insulating member is comprised with the sheet | seat, sufficient intensity | strength cannot be ensured. Therefore, it is considered to use an insulating plate as an insulating member for insulating adjacent stator windings. Here, when an insulating plate is used as the insulating member, there is a risk that the coating of the stator winding may be damaged by the insertion pressure when the insulating plate is inserted into the slot. For this reason, it is necessary to arrange an insulating sheet around the insulating plate. However, there has been no insulating sheet manufacturing method and insulating sheet manufacturing apparatus capable of efficiently manufacturing an insulating sheet disposed around an insulating plate.
The present invention was devised in view of such a point, and an insulating plate that insulates stator windings (adjacent stator windings inserted into slots) wound around adjacent teeth. It aims at providing the technique which can manufacture efficiently the insulating sheet arrange | positioned around.

The first invention relates to an insulating sheet manufacturing method. The insulating sheet manufactured using the present invention is disposed around an insulating plate that insulates the stator winding wound around each adjacent tooth. Preferably, in a stator and an electric motor in which a stator winding is wound in a concentrated winding method, the stator winding is used as an insulating sheet disposed around an insulating plate that insulates an adjacent stator winding inserted in a slot. It is done.
In the present invention, an insulating sheet is manufactured by processing a sheet, preferably a sheet formed of a resin having insulating properties. As a sheet, a sheet having a first edge and a second edge that are separated in at least one direction, preferably, a first edge and a second edge that are separated in one direction, one direction A quadrangular sheet having a third edge and a fourth edge that are separated in a direction perpendicular to each other is used.
The present invention has first to third steps.
In the first step, a first crease line dividing the sheet into a first end portion, a first intermediate portion, a second intermediate portion, a third intermediate portion, and a second end portion along one direction. , Forming a second crease line, a third crease line, and a fourth crease line.
In the second step, the first end portion is folded to one side in the sheet thickness direction along the first crease line, and the second end portion is folded to the sheet thickness along the fourth crease line. Bend to one side of the direction. For example, the first and second end portions are bent using the first and second end portion bending members in a state where the sheet on which the first to fourth crease lines are formed is supported by the sheet support member. Preferably, after the second step bending operation is performed, the angle between the first end portion and the first intermediate portion and the angle between the second end portion and the third intermediate portion are The bending operation of the second step is performed so as to be approximately 90 degrees.
The operation | work which bends a sheet | seat, especially a resin-made sheet | seat is performed in the state which heated the sheet | seat. In this case, when the sheet temperature is lowered after the sheet is folded, the folded shape of the sheet changes. In the present invention, the first end portion and the first intermediate portion are bent when the first end portion is bent with respect to the first intermediate portion and when the second end portion is bent with respect to the third intermediate portion. And the angle θ between the second end portion and the third intermediate portion are set in the range of 20 degrees to 40 degrees, preferably in the range of 25 degrees to 35 degrees. . The bending angle of the first and second end portions is [180−θ] degrees.
Accordingly, the angle between the first end portion and the first intermediate portion after the first end portion is bent, and the second end portion and the third intermediate portion after the second end portion is bent, The angle between can be approximately 90 degrees. If the angle θ is too small, the elastic restoring force after the bending work becomes small, and if the angle θ is too large, the original shape is restored by the elastic restoring force.
In the third step, the first intermediate portion is folded along the second crease line to the other side in the sheet thickness direction, and the third intermediate portion is folded along the third crease line. Bend to the other side of the direction. In the present invention, in the state where the sheet is supported so that the increase in the interval between the bent first end portion and the second end portion is restricted, the intermediate portion pressing member is provided on the other side in the sheet thickness direction . The second intermediate portion of the surface is pressed to the other side in the sheet thickness direction. Then, in a state where the intermediate portion pressing member is in contact with the second intermediate portion on the other surface in the sheet thickness direction, the first intermediate portion and the third intermediate portion are connected to the first intermediate portion and the first intermediate portion. 3. Press so that the interval between the three intermediate portions becomes small.
The operations in the first to third steps are performed with the sheet temperature adjusted. In the present invention, the operations in the first to third steps are performed in a state where the temperature of the sheet is adjusted within the range of 60 to 90 degrees, preferably within the range of 70 to 90 degrees. As a method for adjusting the temperature of the sheet, a method of adjusting the temperature of the sheet during the operation or a method of adjusting the temperature of the sheet before the operation can be used.
Thereby, a crease line can be formed with high accuracy, and the end portion and the intermediate portion can be bent with high accuracy. In addition, when the work is performed with the sheet temperature being too high, the elastic restoring force of the sheet after the work is reduced, and when the work is performed with the sheet temperature being too low, an appropriate value is obtained. It does not become a shape, but returns to its original shape due to elastic restoring force.
By using the insulating sheet manufacturing method of the present invention, it is possible to efficiently manufacture an insulating member having a trapezoidal cross section formed by the first intermediate portion, the second intermediate portion, and the third intermediate portion. . An insulating plate that insulates adjacent stator windings is disposed in the space formed by the first intermediate portion, the second intermediate portion, and the third intermediate portion.

In a different form of the first invention , in the first step, the first to fourth crease lines are constituted by a concave portion formed on one surface and a convex portion formed on the other surface. A concave portion is formed on the inner surface when bent. That is, the first crease line and the fourth crease line are formed by projecting the recess formed by denting the surface on one side in the sheet thickness direction and the surface on the other side in the sheet thickness direction. It is comprised by the convex part made. Further, the second crease line and the third crease line are formed by projecting a surface on one side in the sheet thickness direction and by denting the surface on the other side in the sheet thickness direction. It is comprised by the recessed part formed.
In this embodiment, since the crease line is constituted by the concave portion formed on the inner surface when folded and the convex portion formed on the outer surface when folded, the folding operation is easy.

In another different form of the first invention, the bending operation of the first and second end portions and the bending operation of the first intermediate portion and the third intermediate portion are performed in an atmosphere in which measures for removing static electricity are taken. ing. As a method of “performing bending work in an atmosphere in which static electricity removal measures are taken”, for example, a method of providing a static electricity removal device can be used. As the static eliminator, for example, an ion generator that generates negative ions for removing static electricity can be used.
In this embodiment, it is possible to prevent adverse effects due to static electricity generated during the sheet folding operation. Note that the first to fourth crease lines are preferably formed in an atmosphere in which measures for removing static electricity are taken.

The second invention relates to an insulating sheet manufacturing apparatus. The insulating sheet manufactured using the present invention is used as an insulating sheet disposed around an insulating plate that insulates the stator winding wound around each adjacent tooth, as in the first invention.
In this invention, the sheet | seat similar to the sheet | seat used with the insulating sheet manufacturing method mentioned above is processed, and an insulating sheet is manufactured.
The present invention includes a crease line forming device, an end portion bending device, an intermediate portion bending device, and a temperature adjusting device.
The crease line forming device has a first end portion, a first intermediate portion, and a second intermediate portion along a direction between a first edge and a second edge that are separated in one direction. A first crease line, a second crease line, a third crease line, and a fourth crease line that are divided into a portion, a third intermediate portion, and a second end portion are formed.
The end portion bending apparatus bends the first end portion along the first crease line to one side in the sheet thickness direction, and the second end portion of the sheet thickness along the fourth crease line. It is configured to bend to one side in the direction. Preferably, the end part bending device is configured to fold the first and second end parts, and then the angle between the first end part and the first intermediate part and the second end part and the third intermediate part. It is comprised so that the angle between parts may be about 90 degree | times.
The intermediate part bending apparatus bends the first intermediate part along the second crease line to the other side in the sheet thickness direction, and the third intermediate part has the sheet thickness along the third crease line. It is configured to bend to the other side of the direction.
In the present invention, the intermediate part bending apparatus includes a first end part support member, a second end part support member, and an intermediate part pressing member. The first end portion support member and the second end portion support member are in a state in which the interval between the first end portion and the second end portion folded by the end portion bending device is restricted, The first edge portion and the second edge portion of the sheet can be supported. In addition, at least one of the first end portion support member and the second end portion support member is configured to be movable in a direction toward and away from each other. The intermediate part pressing member is configured such that the sheet is supported by the first end part supporting member and the second end part supporting member, and the second intermediate part on the other surface in the sheet thickness direction is the sheet thickness. It is configured to be pressable on one side in the direction.
In the present invention, in a state where the sheet is supported by the first end portion support device and the second end portion support device that are arranged at separate positions, the second intermediate portion is moved to the first end portion by the intermediate portion pressing member. Push between the end piece support member and the second end piece support member. Then, in this state, the first end portion supporting member and the second end portion supporting member are moved in a direction approaching each other, and the first intermediate portion and the third intermediate portion are moved in a direction approaching each other. . Accordingly, the first intermediate portion and the third intermediate portion are supported in a state where the bent first end portion and second end portion are supported by the first end portion support member and the second end portion support member. Therefore, it is possible to efficiently perform the bending work of the intermediate portion.
The temperature adjusting device is configured to form the first to fourth crease lines by the crease line forming device and the first end portion and the second end portion to be bent by the end portion bending device in a state where the temperature of the sheet is adjusted. The first intermediate part and the third intermediate part are bent by the work and the intermediate part bending apparatus. The temperature adjusting device includes, for example, a heating unit that heats the sheet, a temperature detection unit that detects the temperature of the sheet, and a control unit that controls the heating unit based on the temperature of the sheet detected by the temperature detection unit. As the temperature adjusting device, a temperature adjusting treatment for adjusting the temperature of the sheet during processing of the sheet or a temperature adjusting device for adjusting the temperature of the sheet before processing the sheet can be used. Preferably, the temperature adjusting device includes a temperature adjusting means for adjusting the temperature of the sheet when forming the crease line, a temperature adjusting means for adjusting the temperature of the sheet when the end portion is bent, and a sheet of the sheet when the intermediate portion is bent. It is comprised by the temperature control means etc. which adjust temperature.
By using the insulating member manufacturing apparatus of the present invention, it is possible to efficiently manufacture an insulating member having a trapezoidal cross section formed by the first intermediate portion, the second intermediate portion, and the third intermediate portion. .

In a different form of the second invention, the intermediate part bending apparatus has an intermediate part supporting member. The intermediate portion support member can contact the second intermediate portion on the surface on one side in the thickness direction while the sheet is supported by the first end portion support member and the second end portion support member. It is configured.
In the present embodiment, the second intermediate portion on the other surface in the sheet thickness direction is supported by the intermediate portion pressing member while the second intermediate portion on the one surface in the sheet thickness direction is supported by the intermediate portion supporting member. Can be pressed to one side in the sheet thickness direction. Thereby, it can be surely bent along the second crease line and the third crease line on both sides of the second intermediate portion.

In another different form of the second invention , the crease line forming device has first to fourth crease line forming means for forming the first to fourth crease lines. In this embodiment, the crease line forming means is constituted by a concave portion forming member that forms a concave portion by recessing one surface that is inside when bent, and a convex portion forming member that forms a convex portion by projecting the other surface. doing. That is, the first crease line forming means includes a first concave portion forming member arranged on one side in the sheet thickness direction and a first convex portion forming member arranged on the other side in the sheet thickness direction. It is comprised by. The second crease line forming means includes a second convex portion forming member arranged on one side in the sheet thickness direction and a second concave portion forming member arranged on the other side in the sheet thickness direction. It is comprised by. Further, the third crease line forming means includes a third convex portion forming member disposed on one side in the sheet thickness direction and a third concave portion forming member disposed on the other side in the sheet thickness direction. It is comprised by. Further, the fourth crease line forming means includes a third concave portion forming member disposed on one side in the sheet thickness direction and a third convex portion forming member disposed on the other side in the sheet thickness direction. It is comprised by.
In this embodiment, since the crease line is constituted by a concave portion formed on one surface which becomes the inner side when folded, and a concave portion formed on the other surface, the folding operation is easy.

In still another different form of the second invention , the end portion bending apparatus has a sheet support member, a first processed surface, and a second processed surface. The sheet supporting member has a sheet supporting surface that supports the sheet, a first inclined surface that is inclined with respect to the sheet supporting surface, and a second inclined surface.
The sheet support surface, the first and second inclined surfaces, and the first and second processed surfaces are as follows when viewed in a cross section along one direction with the sheet supported by the sheet support surface. It is configured. The sheet support surface is configured to be able to support the sheet such that the first fold line and the fourth fold line face the one edge and the other edge of the sheet support surface, respectively. The first inclined surface is inclined from one edge of the sheet support surface to one side in the sheet thickness direction, and the second inclined surface is from the other edge of the sheet support surface to one side in the sheet thickness direction. It is inclined to. The first processed surface is formed parallel to (including substantially parallel to) the first inclined surface, and is movable in a direction approaching the first inclined surface and a direction separating from the first inclined surface. The configured second processed surface is formed parallel to (including substantially parallel to) the second inclined surface, and is away from the second inclined surface and in a direction approaching the second inclined surface. It is configured to be movable in the direction.
In this embodiment, the first end portion and the second end portion may be bent by moving the first processing surface and the second processing surface while the sheet is supported on the sheet supporting surface of the sheet supporting device. Therefore, the bending operation of the end portion can be performed efficiently.
Preferably, the end portion bending apparatus includes first and second pressing portions that press the first and second end portions of the sheet supported on the sheet supporting surface to one side in the sheet thickness direction. It is done. By using such first and second pressing portions, the first and first end portions can be bent more efficiently.

In still another different form of the second invention , the angle between the seat support surface and the first inclined surface and the angle between the seat support surface and the second inclined surface are in the range of 20 degrees to 40 degrees, Preferably, it is set within a range of 25 to 35 degrees.
In this embodiment, the angle between the first end portion and the first intermediate portion and the second end portion and the second end portion are determined by the elastic restoring force after the first end portion and the second end portion are bent. The angle with respect to the intermediate portion can be approximately 90 degrees.

In still another different form of the second invention , the temperature adjusting device adjusts the temperature of the sheet within a range of 60 degrees to 90 degrees, preferably within a range of 70 degrees to 90 degrees.
In this embodiment, the crease line can be formed with high accuracy, and the end portion and the intermediate portion can be bent with high accuracy.

In still another different form of the second invention, a static eliminator for removing static electricity is provided. The bending operation of the first end portion and the second end portion and the bending operation of the first intermediate portion and the third intermediate portion are performed in an atmosphere in which static electricity is removed by the static eliminator. Has been. As the static eliminator, for example, an ion generator that generates negative ions is used.
In this embodiment, it is possible to prevent adverse effects due to static electricity generated during the sheet folding operation. Note that the first to third crease lines are preferably formed in an atmosphere in which static electricity removal measures are taken.

  By using the insulating member manufactured by the insulating member manufacturing method or the insulating member manufacturing apparatus of the present invention described above as the insulating member of the stator, or by using it as the insulating member of the stator constituting the electric motor, the above-described effects can be obtained. A stator or an electric motor can be obtained.

  By using the insulating sheet manufacturing method or the insulating sheet manufacturing apparatus of the present invention, the insulating sheet can be manufactured efficiently. Moreover, a stator or an electric motor can be efficiently manufactured by using the stator or the electric motor of the present invention.

It is a perspective view of the stator of an electric motor. It is a perspective view of an insulating sheet. It is a perspective view of an insulating member. It is a figure explaining the operation | movement which inserts an insulating sheet and an insulating member in the slot of a stator. FIG. 4 is a cross-sectional view perpendicular to the axial direction of the stator in a state in which the stator winding, the insulating sheet, and the insulating member are inserted into the stator slots. It is a figure explaining the outline | summary of the insulating sheet manufacturing method of one Embodiment. It is a figure explaining the structure and operation | movement of a crease line formation apparatus used with the insulating sheet manufacturing apparatus of one Embodiment. It is the figure which looked at FIG. 7 from the VIII-VIII line direction. It is a figure explaining the structure and operation | movement of the edge part bending apparatus used with the insulating sheet manufacturing apparatus of one Embodiment. It is a figure explaining the structure and operation | movement of the edge part bending apparatus used with the insulating sheet manufacturing apparatus of one Embodiment. It is a figure explaining the structure and operation | movement of the edge part bending apparatus used with the insulating sheet manufacturing apparatus of one Embodiment. It is a figure explaining the structure and operation | movement of the edge part bending apparatus used with the insulating sheet manufacturing apparatus of one Embodiment. It is a figure explaining the structure and operation | movement of the edge part bending apparatus used with the insulating sheet manufacturing apparatus of one Embodiment. It is a figure explaining the structure and operation | movement of an intermediate | middle partial bending apparatus used with the insulating sheet manufacturing apparatus of one Embodiment. It is a figure explaining the structure and operation | movement of an intermediate | middle partial bending apparatus used with the insulating sheet manufacturing apparatus of one Embodiment. It is a figure explaining the structure and operation | movement of an intermediate | middle partial bending apparatus used with the insulating sheet manufacturing apparatus of one Embodiment.

Embodiments of the present invention will be described below with reference to the drawings. In the following, a stator in which a stator winding is wound by a concentrated winding method, and an electric motor (a permanent magnet embedded type electric motor) in which a rotor having a permanent magnet is rotatably supported with respect to the stator will be described. To do. Of course, the insulating sheet of the present invention can be used for electric motors of various other configurations.
In the present specification, the “axial direction” indicates the direction of the rotation axis of the rotor, that is, the direction of the rotation center line in a state where the rotor is rotatably supported with respect to the stator. In addition, the “circumferential direction” indicates a circumferential direction centering on the rotation center line when viewed in a cross section perpendicular to the axial direction in a state where the rotor is rotatably supported with respect to the stator. In addition, the “radial direction” indicates a direction perpendicular to the rotation center line as viewed in a cross section perpendicular to the axial direction in a state where the rotor is rotatably supported with respect to the stator.

  The configuration of the electric motor will be described with reference to FIGS. 1 is a perspective view of the stator 10 of the electric motor, FIG. 2 is a perspective view of the insulating sheet 50, FIG. 3 is a perspective view of the insulating plate 60, and FIG. FIG. 5 is a diagram for explaining the operation of inserting the insulating plate 60 into the slot 25. FIG. 5 shows the axial direction of the stator in a state where the stator winding 40, the insulating sheet 50, and the insulating plate 60 are inserted into the slot 25. FIG. Although the rotor is not illustrated in FIG. 1, a rotor having a magnet insertion hole and a permanent magnet accommodated in the magnet insertion hole is used as the rotor. The rotor is supported rotatably with respect to the stator 10. At this time, the rotor, that is, the rotation axis of the rotor rotates about the rotation center line P.

As shown in FIGS. 1 and 5, the stator 10 has a stator core 20, a slot insulating member 30, a stator winding 40, an insulating sheet 50, an insulating plate 60, and an end insulating member 80. ing.
The stator core 20 is configured by laminating thin magnetic steel sheets in the axial direction and integrating them with an auto clamp or the like in which adjacent magnetic steel sheets are provided with unevenness and caulked with each other.
As shown in FIG. 5, the stator core 20 is disposed along the circumferential direction inside the yoke 21 and the yoke 21 extending along the circumferential direction when viewed in a cross section perpendicular to the axial direction. A plurality of teeth 22 are provided. In FIG. 1, the yoke 21 is formed in an annular shape (including a substantially annular shape). The teeth 22 are provided on the tooth base 23 extending inward (rotor side) along the radial direction from the yoke 21, and on the tip side (rotor side) of the teeth base 23, and extend along the circumferential direction. The tooth | gear tip part 24 which has. In the tooth tip 24, a tooth tip surface 22a is formed on the rotor side. The rotor is rotatably supported in a state where there is a gap between the outer peripheral surface of the rotor and the tooth tip surface 22a in the rotor housing space 20a formed by the tooth tip surface 22a.
A slot 25 is formed by the yoke 21 and two teeth 22 adjacent in the circumferential direction. The slot 25 has a slot opening 25a between the tooth tips 24 of the two teeth 22 adjacent in the circumferential direction.

  A slot insulating member 30 is inserted into the slot 25. The slot insulating member 30 is made of a resin having insulating properties and is made of an elastic sheet (film). As the sheet, for example, a sheet formed of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or the like is used. The stator winding 40 is directly wound around the teeth 22 by the concentrated winding method with the slot insulating member 30 inserted in the slot 25. That is, the stator winding 40 (adjacent stator winding 40) wound around each of the two adjacent teeth 22 forming the slot 25 is inserted into the slot 25. The slot insulating member 30 insulates the stator winding 40 from the stator core 20.

An insulating plate 60 that insulates adjacent stator windings 40 is inserted into the slot 25. The insulating plate 60 is formed in a plate shape from a resin having insulating properties. For example, polyamide (PA), polyacetal (POM), polycarbonate (PC), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), liquid crystal polymer (LCP), fluororesin, polyether ether ketone (PEEK), polybutylene terephthalate (PBT), polyethylene terephthalate (PET) or the like. Moreover, in order to raise resin strength, glass fiber (fiber) can be mixed with above described resin.
As shown in FIG. 3, the insulating plate 60 includes a side surface 61 disposed between adjacent stator windings 40, an inner diameter side end portion 62 disposed on the slot opening 25a side, and a yoke 21 side. It has an outer diameter side end 63 to be arranged. A convex portion 64 is formed on the outer diameter side end portion 63 on the side facing the end insulating member 80. Further, in order to facilitate the insertion between the stator windings 40, a wedge-shaped tip portion 66 is provided on the side inserted between the stator windings 40. A recess 65 is provided on the side facing the end insulating member 80.

Furthermore, an insulating sheet 50 disposed around the insulating plate 60 (between the insulating plate 60 and the stator winding 40) is inserted into the slot 25.
The insulating sheet 50 is made of a resin having insulating properties and is made of an elastic sheet (film). As the sheet, for example, a sheet formed of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or the like is used.
As shown in FIGS. 2 and 5, the insulating sheet 50 includes a first crease line 52a, a second crease line 52b, and a third crease line 52c formed between the edges 100a and 100b. The first end portion 51a, the first intermediate portion 51b, the second intermediate portion 51c, the third intermediate portion 51d, and the second end portion 51e are divided by the fourth fold line 52d. The first intermediate part 51b and the third intermediate part 51d are bent along the second crease line 52b and the third crease line 52c so that the opposite side to the second intermediate part 51c opens. The first end portion 51a is bent outward from the opening along the first crease line 52a. The second end portion 51e is bent outward from the opening along the fourth crease line 52d. Thereby, the insulating sheet 50 has a cross section formed in a trapezoidal shape (including a substantially trapezoidal shape) by the first intermediate portion 51b, the second intermediate portion 51c, and the third intermediate portion 51d.

The stator core 20 has axial end faces on both axial sides. The end insulating members 80 are disposed on both sides in the axial direction of the stator core 20 at positions facing the axial end surfaces. The end insulating member 80 is formed of a resin having insulating characteristics, such as polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), or liquid crystal polymer (LCP).
The end insulating member 80 includes a first member (inner wall member) 81 disposed at a position facing the tooth tip 24 of the tooth 22, and a second member (outer wall member) disposed at a position facing the yoke 21. 82 and a connecting member 83 disposed at a position facing the tooth base 23 of the tooth 22. The connecting member 83 connects the first member 81 and the second member 82. In a state where the end insulating member 80 is disposed so as to face the axial end surface of the stator core 20, the first member 81 has a circumferential shape along the tooth tip 24 as viewed in a cross section perpendicular to the axial direction. The second member 82 extends along the circumferential direction along the yoke 21, and the connecting member 83 extends along the radial direction along the teeth base 23. Further, the first member 81 and the second member 82 extend along the axial direction. In addition, the notch part 81a is formed in the circumferential direction both ends of the 1st member 81 along the axial direction inside radial direction. Further, an inner peripheral surface 82 a is formed on the inner peripheral side of the second member 82 on the stator core end surface side.
The stator winding 40 is wound so that the connecting member 83 of the end insulating member 80 in which the end insulating member 80 is disposed on both axial sides of the stator core 20 and the tooth base 23 of the tooth 22 are integrated. .

When inserting the insulating plate 60 into the slot 25 of the stator core 20, as shown in FIG. 4, the insulating plate 60 is inserted into the space formed by the first to third intermediate portions, The first intermediate portion 51b and the third intermediate portion 51d were elastically deformed so as to contact the insulating plate 60.
Then, the insulating sheet 50 and the insulating plate 60 are moved in the axial direction and inserted into the slot 25. At this time, the insulating sheet 50 and the insulating plate 60 are disposed between adjacent stator windings 40 inserted into the slots. Further, the first end portion 51a and the second end portion 51e of the insulating sheet 50 prevent the stator winding 40 inserted into the slot 25 from jumping out of the slot opening 25a.
The arrangement position of the insulating plate 60 can be adjusted by changing the position where the convex portion 64 is engaged with the inner peripheral surface 82a of the second member 82 of the end insulating member 80.

An outline of an insulating member manufacturing method according to an embodiment will be described with reference to FIG. In the present embodiment, the insulating sheet 50 is manufactured using the rectangular sheet 100 having the edges 100a to 100d. In FIG. 6, the x direction, the y direction, and the z direction indicate the width direction, the longitudinal direction, and the thickness direction of the sheet 100, respectively. That is, the sheet 100 is separated along the first edge portion 100a and the second edge portion 100b that are separated along the width direction (x direction) and the longitudinal direction (y direction) orthogonal to the width direction. 3 edge part 100c and 4th edge part 100d. The length direction (y direction) and the thickness direction (z direction) correspond to the axial direction and the radial direction, respectively, in a state where the insulating sheet 50 is inserted into the slot 25.
The width direction (x direction) corresponds to “one direction” of the present invention, and the longitudinal direction (y direction) corresponds to “direction intersecting one direction” or “axial direction” of the present invention, and the thickness direction. (Z direction) corresponds to the “sheet thickness direction” of the present invention.

  The insulating member manufacturing method of the present embodiment has a first step, a second step, and a third step. FIGS. 6A, 6B, and 6C show operations of the first step, the second step, and the third step, respectively. 6A, 6 </ b> B, and 6 </ b> C, the upper figure is a plan view, and the lower figure is a cross-sectional view along the width direction (x direction) (cross-sectional view along the line A-A). , BB line sectional view, CC line sectional view).

In the first step, as shown in FIG. 6A, the first extending along the longitudinal direction between the first edge portion 100 a and the second edge portion 100 b of the sheet 100 that has been fed. Fold line 52a, second crease line 52b, third crease line 52c, and fourth crease line 52d are formed. As a result, the sheet 100 has a first end portion 51a between the first edge 100a and the first crease line 52a, a first crease line 52a, and a second crease line 52b along the width direction. Between the first intermediate portion 51b between the second fold line 52b and the second fold line 52c and the third fold line 52c, and between the third fold line 52c and the fourth fold line 52d. A third intermediate portion 51d therebetween and a second end portion 51e between the fourth fold line 52d and the second edge portion 100b are divided.
In the present embodiment, of the first to fourth crease lines 52a to 52d, of the surfaces 100A and 100B of the sheet 100, a concave portion formed by recessing one surface that becomes the inner side when folded, and the other surface It is comprised by the convex part formed by protruding. In the present embodiment, in the cross-sectional view of FIG. 6A (cross-sectional view along the width direction), the first end portion 51a and the second end portion 51e are bent to the surface 100B side, and the first intermediate portion is formed. 51b and the third intermediate portion 51d are bent toward the surface 100A. For this reason, the first crease line 52a (fourth crease line 52d) is constituted by a recess 52a1 (52d1) formed on the surface 100B and a protrusion 52a2 (52d2) formed on the surface 100A. Further, the second crease line 52b (third crease line 52c) is constituted by a convex part 52b2 (52c2) formed on the surface 100B and a concave part 52b1 (52c1) formed on the surface 100A. By forming the crease line by the concave portion formed on the inner surface when folded and the convex portion formed on the outer surface when folded, the sheet can be easily and reliably folded.
The surface 100B corresponds to “a surface on one side in the sheet thickness direction” of the present invention, and the surface 100A corresponds to “a surface on the other side in the sheet thickness direction” of the present invention. Further, the direction from the surface 100A to the surface 100B corresponds to “one side in the sheet thickness direction” of the present invention, and the direction from the surface 100B to the surface 100A corresponds to “the other side in the sheet thickness direction” of the present invention. To do.
After the first to fourth crease lines 52a to 52d are formed on the sheet 100, the sheet 100 is cut into a predetermined length (the length of the insulating sheet 50) by a cutting device. The first to fourth crease lines 52a to 52d may be formed after the sheet 100 is cut to a predetermined length.

In the second step, as shown in FIG. 6B, the first end portion 51a and the second end portion 51e of the sheet 100 are bent. That is, in the cross-sectional view of FIG. 6B, the first end portion 51a is bent toward the surface 100B along the first fold line 52a, and the second end portion 51e is bent to the fourth fold line 52d. Along the surface 100B side.
In the present embodiment, the first end portion 51a and the second end portion 51e are bent at the same time while the sheet 100 is supported.

  In the third step. As shown in FIG. 6C, the first intermediate portion 51b and the third intermediate portion 51d of the sheet 100 are bent. That is, in the cross-sectional view of FIG. 6C, the first intermediate portion 51b is bent toward the surface 100A along the second fold line 52b, and the third intermediate portion 51d is bent to the third fold line 52c. Along the surface 100A side.

Work for forming first to fourth crease lines 52a to 52d in the first step, work for bending the first end portion 51a and the second end portion 51e in the second step, and the first in the third step The operation of bending the intermediate portion 51b and the third intermediate portion 51d is performed with the sheet temperature adjusted. The temperature of the sheet is set in the range of 60 degrees to 90 degrees, preferably in the range of 70 degrees to 90 degrees. When the temperature of the sheet is too high, the elastic restoring force after finishing the bending work is small. On the other hand, if the temperature of the sheet is too low, it returns to its original shape due to the elastic restoring force after the folding operation is finished.
As a method for adjusting the temperature of the sheet, for example, a heating unit that heats the sheet, a temperature detection unit that detects the temperature of the sheet, and a control that controls the heating unit based on the temperature of the sheet detected by the temperature detection unit The temperature control means comprised by the means can be used. Further, a method of adjusting the temperature of the sheet during the processing of the sheet (for example, providing a heating means in the processing tool) or a method of adjusting the temperature of the sheet in advance (preheating) before the processing of the sheet is used. be able to.
Further, when the folding operation is performed with the sheet temperature adjusted, it is preferable to hold the folded state for a set time. For example, hold for about 0.5 seconds to 5 seconds. If the holding time is short, it will return to its original shape by the elastic restoring force after the bending work is finished. If the holding time is too long, the elastic restoring force after finishing the bending work is small.
Since the insulating sheet 50 manufactured by the insulating sheet manufacturing method of the present embodiment is inserted into the slot 25 using the elastic force, it is necessary to manufacture the insulating sheet 50 while maintaining the elastic restoring force.
Further, it is necessary to set the angle between the first end portion 51a and the first intermediate portion 51b and the angle between the second end portion 51e and the third intermediate portion 51d to approximately 90 degrees. The bending angle of the first end portion 51a and the second end portion 51e in the second step needs to be set in consideration of elastic restoration after the bending operation is finished. Bending angle of the first end portion 51a in the second step [= 180 degrees-(angle between the first end portion 51a and the first intermediate portion 51b at the time of bending)] and the second end portion 51e. The bending angle [= 180 degrees− (the angle between the second end portion 51e and the third intermediate portion 51d during bending)] is in the range of 140 to 160 degrees, preferably 145 to 155. Set within the range of degrees.
In addition, work efficiency and the like decrease due to static electricity generated in the sheet. For this reason, the formation work of the first to fourth crease lines 52a to 52d in the first step, the bending work of the first end portion 51a and the second end portion 51e in the second step, and the third step The bending operation of the first intermediate portion 51b and the third intermediate portion 51d is preferably performed in an atmosphere where static electricity removal measures are taken. As a static electricity removal countermeasure method, a method of providing a known static electricity removal device can be used. For example, a method can be used in which an ion generator that generates negative ions for removing static electricity is provided at a place where work is performed.

Next, the configuration and operation of the insulating sheet manufacturing apparatus according to the embodiment will be described with reference to FIGS.
The insulating sheet manufacturing apparatus of the present embodiment includes a crease line forming apparatus 200. An end partial folding device 300 and an intermediate partial folding device 400 are included.

The crease line forming apparatus 200 is shown in FIGS. FIG. 7 is a view of the crease line forming apparatus 200 as viewed from a direction perpendicular to the width direction (x direction) of the sheet 100, and FIG. 8 is viewed from a direction perpendicular to the longitudinal direction (y direction) of the sheet 100. FIG.
The crease line forming apparatus 200 forms first to fourth crease lines 52a to 52d along the width direction (x direction) between the first edge part 100a and the second edge part 100b. Fourth crease line forming means 210a to 210d are provided.
In the present embodiment, the crease line forming means is disposed on both sides in the thickness direction (z direction) with the sheet 100 interposed therebetween, and one of the surfaces 100A and 100B of the sheet 100 that is the inner side when folded is formed. It is comprised by the recessed part formation member which dents and forms a recessed part, and the convex part formation member which makes the other surface protrude and forms a convex part. That is, as shown in FIG. 7, the first crease line forming means 210a (fourth crease line forming means 210d) is disposed on the surface 100B side, and forms a recess 52a1 (52d1) on the surface 100B. It is comprised by the recessed part formation member 210a1 (210d1) and the convex part formation member 210a2 (210d2) which is arrange | positioned at the surface 100A side and forms the convex part 52a2 (52d2) in the surface 100A. The second crease line forming means 210b (third crease line forming means 210c) is disposed on the surface 100A side and has a recess forming member 210b1 (210c1) that forms the recess 52b1 (52c1) on the surface 100A. The convex portion forming member 210b2 (210c2) is disposed on the 100B side and forms the convex portion 52b2 (52c2) on the surface 100B.
Note that the recess forming member has a convex outer peripheral surface on the outer side when viewed in a cross section perpendicular to the axial direction. Further, the convex portion forming member has a concave outer peripheral surface on the center side when viewed in a cross section perpendicular to the axial direction. When forming a crease line on the sheet 100, the concave portion forming members and the convex portion forming members disposed on both sides in the thickness direction with the sheet 100 interposed therebetween are brought into contact with one surface and the other surface of the sheet 100. Rotate.
Although not shown in the figure, on the downstream side of the crease line forming device 200, the sheet 100 on which the first to fourth crease lines 52a to 52d are formed is cut to a predetermined length (the length of the insulating sheet 50). A device is provided.

  As shown in FIG. 8, in the present embodiment, the heating means 215 for heating the sheet 100 and the temperature of the sheet 100 are set upstream of the first to fourth crease line forming means 210a to 210d. Temperature detecting means (first temperature adjusting means) constituted by temperature detecting means 216 to detect and control means (not shown) for controlling the heating means 215 based on the temperature of the sheet 100 detected by the temperature detecting means 216. Is provided. The first to fourth crease lines 52a to 52d are formed on the sheet 100 by the crease line forming apparatus 200 in a state where the temperature of the sheet 100 is adjusted by the temperature adjusting means. Of course, the first to fourth crease line forming means 210a to 210d may be provided with temperature adjusting means.

The edge part bending apparatus 300 is shown by FIGS. 9-13. 9 to 13 are diagrams for explaining the configuration and operation of the end portion bending apparatus 300, as viewed from a direction perpendicular to the width direction (x direction) of the sheet 100. FIG.
As shown in FIG. 11, the end part bending apparatus 300 includes a sheet support member 310, an end part pressing member 320, a first end part bending member 330, and a second end part bending member 340.
As shown in FIG. 9, the sheet support member 310 is inclined with respect to the sheet support surface 311 and the sheet support surface 311 that support the sheet 100 on which the first to fourth crease lines 52 a to 52 d are formed. The first inclined surface 312 and the second inclined surface 313 are provided.
The sheet support surface 311 supports the sheet 100 on which the first to fourth crease lines 52a to 52d are formed, and is viewed from a direction perpendicular to the width direction (x direction) of the sheet 100. Edge portion 311a and second edge portion 311b.
In the following description, unless otherwise specified, the case where the sheet 100 is supported and viewed from a direction perpendicular to the width direction (x direction) of the sheet 100 will be described.
The sheet support surface 311 can support the sheet 100 so that the first crease line 52a and the fourth crease line 52d of the sheet 100 face the first edge part 311a and the second edge part 311b, respectively. It is configured. That is, the interval between the first crease line 52a and the fourth crease line 52d of the sheet 100 is set to be approximately equal to the interval between the first edge 311a and the second edge 311b of the sheet support surface 311. Has been.
The first inclined surface 312 is between the sheet supporting surface 311 and the first inclined surface 312 on the opposite side (one side in the thickness direction) from the first edge 311 a of the sheet supporting surface 311. Is inclined so that the angle (inclination angle) becomes θ. The second inclined surface 313 is located between the sheet supporting surface 311 and the second inclined surface 313 on the side opposite to the sheet 100 (one side in the thickness direction) from the second edge 311b of the sheet supporting surface 311. Is inclined so that the angle (inclination angle) becomes θ. In the present embodiment, the inclination angle θ between the first inclined surface 312 (second inclined surface 313) and the sheet support surface 311 is in the range of 20 degrees to 40 degrees, preferably 25 degrees to 35 degrees. It is set within the range of degrees.

The end portion pressing member 320 has a main body 321 as shown in FIG. The main body portion 321 has a first pressing portion 322 and a second pressing portion 323 that are separated in the width direction (x direction). In addition, a recess 321b that is recessed from the front end surfaces of the first pressing portion 322 and the second pressing portion 323 by the inner wall surface 322a of the first pressing portion 322 and the inner wall surface 323a and the bottom surface 321a of the second pressing portion 323. Is formed.
The first pressing portion 322 and the second pressing portion 323 are configured so that the first end portion 51a and the second end portion 51e of the sheet 100 supported by the sheet support surface 311 are respectively on the surface 100B side (in the thickness direction). One side) can be pressed. That is, the interval between the first pressing portion 322 and the second pressing portion 323 is set longer than the interval between the first crease line 52a and the fourth crease line 52d.
The end portion pressing member 320 corresponds to the “end portion pressing member that presses the first end portion and the second end portion of the sheet toward one side in the sheet thickness direction” of the present invention. Further, the first pressing portion 322 and the second pressing portion 323 of the end portion pressing member 320 are respectively “the first end that presses the first end portion of the sheet to one side in the sheet thickness direction” of the present invention. It corresponds to “partial pressing member” and “second end partial pressing member that presses the second end portion of the sheet to one side in the sheet thickness direction”.

In a state where the sheet 100 is supported by the sheet supporting surface 311, the end portion pressing member 320 is replaced by the first pressing portion 322 and the second pressing portion 323, and the first end portion 51 a and the second pressing portion 323 of the sheet 100, respectively. It moves to the direction which contacts the edge part 51e of this. Accordingly, the first end portion 51a and the second end portion 51e of the sheet 100 are arranged on the surface 100B side along the first fold line 52a and the fourth fold line 52d, as shown in FIG. Inclined to. The movement of the end portion pressing member 320 is such that the inclination angle of the first end portion 51a and the second end portion 51e is the first by the first end portion bending member 330 and the second end portion bending member 340, which will be described later. The end portion 51a and the second end portion 51e are stopped at a position where the set inclination angle can be easily obtained. In the present embodiment, the movement of the end portion pressing member 320 is stopped at a position where the bottom surface 321a of the end portion pressing member 320 is in contact with the surface 100A of the sheet 100. Here, the length of the inner wall surface 322a of the first pressing portion 322 and the inner wall surface 323a of the second pressing portion 323 (the depth of the recess 321b) is such that the bottom surface 321a of the end portion pressing member 320 is the surface 100A of the sheet 100. Is set so that the inclination angle of the first end portion 51a and the second end portion 51e becomes the set inclination angle.
The sheet support member 310 includes a temperature adjusting unit (not shown) configured by a heating unit 315 that heats the sheet 100, a temperature detection unit 316 that detects the temperature of the sheet 100, and a control unit (not shown) that controls the heating unit 315. Second temperature adjusting means) is provided. Thereby, the operation | work which inclines the 1st end part 51a and the 2nd end part 51e of the sheet | seat 100 is performed in the state in which the temperature of the sheet | seat 100 was adjusted.

As shown in FIG. 11, the first end part bending member 330 has a first processed surface 331. The first processed surface 331 is formed in parallel (including substantially parallel) to the first inclined surface 312 of the sheet support member 310. The first end partial bending member 330 is configured to be movable in a direction in which the first processed surface 331 is in contact with the first inclined surface 312 and in a direction away from the first inclined surface 312.
The second end portion bending member 340 has a second processing surface 341. The second processing surface 341 is parallel to (including substantially parallel to) the second inclined surface 313 of the sheet support member 310. Is formed. The second end partial bending member 340 is configured to be movable in a direction in which the second processed surface 341 comes into contact with the second inclined surface 313 and in a direction away from the second inclined surface 313.

In a state where the first end portion 51 a and the second end portion 51 e are inclined by the end portion pressing member 320, the first end portion in the direction in which the first processed surface 331 contacts the first inclined surface 312. The bending member 330 is moved, and the second end partial bending member 340 is moved in a direction in which the second processed surface 341 contacts the second inclined surface 313. As a result, the first end portion 51a of the sheet 100 is bent along the first fold line 52a so that the first end portion 51a contacts the first inclined surface 312 and the second end portion 51e is second inclined surface 313. Is bent along the fourth crease line 52d. At this time, the first end portion 51a (second end portion 51e) is an angle between the first end portion 51a and the first intermediate portion 51b (the second end portion 51e and the third intermediate portion). The angle between the angle 51d and the angle 51d is bent by θ. That is, the first end portion 51a (second end portion 51e) is bent by [180 degrees−θ] degrees.
The first end part bending member 330 (second end part bending member 340) includes a heating means 335 (345) for heating the sheet 100, a temperature detection means 336 (346) for detecting the temperature of the sheet 100, Temperature adjusting means (third temperature adjusting means, fourth temperature adjusting means) configured by control means (not shown) for controlling the heating means 335 (345) is provided. Thereby, the operation | work which bends the 1st end part 51a and the 2nd end part 51e of the sheet | seat 100 in the state in which the temperature of the sheet | seat 100 is adjusted can be performed.
After maintaining the state shown in FIG. 12 for a set time (for example, 0.5 seconds to 5 seconds), the end portion pressing member 320, the first end portion bending member 330, and the second end portion bending member 340 are moved. When separated from the sheet support member 310, the elastic restoring force causes the angle between the first end portion 51a and the first intermediate portion 51b and the second end portion 51e and the second end portion as shown in FIG. The angle between the third intermediate portion 51d and the third intermediate portion 51d is approximately 90 degrees.

The intermediate partial folding apparatus 400 is shown in FIGS. 14-16 is a figure explaining the structure and operation | movement of the intermediate | middle partial bending apparatus 400. FIG.
As shown in FIG. 14, the intermediate part bending apparatus 400 includes a first end part supporting member 410, a second end part supporting member 420, an intermediate part pressing member 430, and an intermediate part supporting member 440. Yes.
The first end portion support member 410 has a first main body 411. The first main body 411 includes a first end portion position restricting member 412 and a first intermediate portion position restricting member 413. Similarly, the second end portion supporting member 420 includes a first end portion position restricting member 413. 2, a second end portion position restricting member 422, and a second intermediate portion position restricting member 423.
The first main body portion 411 and the second main body portion 421 are respectively provided with the first edge portion 100a and the second edge portion 100b of the sheet 100 in which the first end portion 51a and the second end portion 51e are bent. It can be supported. Moreover, the 1st main-body part 411 and the 2nd main-body part 421 are comprised so that a movement to the mutually approaching direction and the direction which leaves | separates (x direction) is possible. The first end portion position restricting member 412 and the second end portion position restricting member 422 restrict an increase in the interval between the bent first end portion 51a and the second end portion 51e of the sheet 100. It is configured as follows. Further, the first intermediate portion position restricting member 413 restricts the movement of the first intermediate portion 51 b of the sheet 100 in a direction (thickness direction) away from the main body portion 411. The second intermediate portion position restricting member 423 restricts the third intermediate portion 51d of the sheet 100 from moving in the direction away from the main body portion 421 (thickness direction).
The intermediate portion pressing member 430 presses the second intermediate portion 51c of the surface 100A to the surface 100B side in a state where the sheet 100 is supported by the first end portion supporting member 410 and the second end portion supporting member 420. Thus, it is configured to be movable in the thickness direction.

When the first intermediate portion 51b and the third intermediate portion 51d of the sheet 100 are bent, as shown in FIG. 14, the first end portion position restricting member 412 and the second end portion position restricting member are used. The distance between the first and second intermediate portions 422 of the sheet 100 is a length corresponding to the sum of the length of the first intermediate portion 51b, the length of the second intermediate portion 51c, and the length of the third intermediate portion 51d. The positions of the first end portion holding member 410 (first main body portion 411) and the second end portion holding member 420 (second main body portion 421) are set. The sheet 100 in which the first end portion 51 a and the second end portion 51 e are bent is fed by the first end portion support member 410 and the second end portion support member 420. At this time, the first end portion 51a and the second end portion 51e are moved in the width direction (x direction) by the first end portion position restricting member 412 and the second end portion position restricting member 422. Movement in the direction in which the interval becomes wider is restricted. The first intermediate portion 51b and the third intermediate portion 51d are moved toward the surface 100A (along the thickness direction) by the first intermediate portion position restricting member 413 and the second intermediate portion position restricting member 423. Movement to the other side) is restricted.
In this state, the intermediate portion pressing member 430 is moved in a direction in which the intermediate portion pressing member 430 contacts the surface 100A of the sheet 100 (one side in the thickness direction), and the second intermediate portion 51c of the surface 100A of the sheet 100 is moved to the surface 100B side (thickness). One side of the direction). At this time, the intermediate part support member 440 is brought into contact with the second intermediate part 51c of the surface 100B of the sheet 100 to support the second intermediate part. Then, as shown in FIG. 15, the second intermediate portion 51c is moved to the second intermediate portion 51c in a state where the intermediate portion pressing member 430 and the intermediate portion supporting member 440 are in contact with both sides of the second intermediate portion of the sheet 100. The first end portion support member 410 is inserted into the space S between the main body portion 411 of the first end portion support member 410 and the main body portion 421 of the second end portion support member 420.
Then, as shown in FIG. 16, the intermediate part support member 440 is moved in a state where the second intermediate part 51 c is inserted into the space S between the first main body part 411 and the second main body part 421. Move away from the sheet 100. Further, the first end portion support member 410 (first main body portion 411) and the second end portion support member 420 (second main body portion 421) are moved in directions approaching each other. As a result, the first intermediate portion 51b and the third intermediate portion 51d of the sheet 100 are pressed by the first main body portion 411 and the second main body portion 421 so that both come into contact with the intermediate portion pressing member 430. It can be bent. The width of the intermediate partial pressing member (the width in the x direction) is set corresponding to the width of the insulating plate 60.
The first end portion support member 410 (first body portion 411) and the second end portion support member in a state where the state shown in FIG. 16 is maintained for a set period (for example, 0.5 second to 8 seconds). 420 (second main body 421) is moved away from each other. At this time, the first intermediate portion 51b and the third intermediate portion 51d are moved away from each other along the second fold line 52b and the third fold line 52c by the elastic restoring force. Thereby, the insulating sheet 50 having a trapezoidal cross section formed by the first intermediate portion 51b, the second intermediate portion 51c, and the third intermediate portion 51d is manufactured.

  Note that the first body portion 411 of the first end portion support member 410 (the second body portion 421 of the second end portion support member 420) has a heating means 415 (425) for heating the sheet 100, the sheet The temperature detecting means 416 (426) for detecting the temperature of 100 and the control means (not shown) for controlling the heating means 415 (425) based on the temperature of the sheet 100 detected by the temperature detecting means 416 (426). Temperature adjusting means (fifth temperature adjusting means, sixth temperature adjusting means) are provided.

  When a resin sheet is used as the sheet 100, static electricity is likely to be generated in the sheet during the operation. When static electricity is generated on the sheet, the sheet adheres to the processing apparatus, the working efficiency is lowered, and the processing accuracy may be lowered. In addition, the manufactured insulating sheets adhere to each other, making handling difficult and reducing work efficiency. In addition, when the manufactured insulating sheet is incorporated into a stator or an electric motor, dust adhered by static electricity may enter the case. For this reason, at least the first end portion 51a and the second end portion 51e are bent in the second step (end portion folding apparatus 300) and the first step in the third step (intermediate partial folding device 400). It is preferable that the bending work of the intermediate part 51b and the third intermediate part 51d is performed in an atmosphere where static electricity removal measures are taken. As a method for performing work in an atmosphere where static electricity removal measures are taken, for example, a method of providing a static electricity removal device can be used. As the static eliminating device, various known static eliminating measures can be used. For example, an ion generator that generates negative ions for removing static electricity can be used.

  Although the insulating sheet manufacturing method and the insulating sheet manufacturing apparatus for manufacturing the insulating sheet have been described above, the present invention is a stator or electric motor using the insulating sheet manufactured by the insulating sheet manufacturing method or the insulating sheet manufacturing apparatus described above. It can also be configured.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions are possible.
The configuration of the first step and the configuration of the crease line forming apparatus 200 can be variously changed within a range in which the first to fourth crease lines can be formed. For example, as a method for forming the first to fourth crease lines, a method other than the method described in the embodiment can be used.
The configuration of the second step and the configuration of the end portion bending apparatus 300 can be variously changed within a range in which the first end portion and the second end portion can be bent. For example, as a method of bending the first end portion or the second end portion, a method other than the method described in the embodiment can be used.
The configuration of the third step and the configuration of the intermediate part bending apparatus 400 can be variously changed within a range in which the first intermediate part and the third intermediate part can be bent. For example, a method other than the method described in the embodiment can be used as a method of bending the first intermediate portion and the third intermediate portion.
As the sheet 100, a sheet formed of various materials other than resin can be used.

10 Stator 20 Stator Core 20a Rotor Housing Space 22 Teeth 22a Teeth Tip Surface 23 Teeth Base 24 Teeth Tip 25 Slot 25a Slot Opening 30 Slot Insulating Member 40 Stator Winding 50 Insulating Sheets 51a, 51e 1 end portion, second end portion)
51b, 51c, 51d Intermediate part (first intermediate part, second intermediate part, third intermediate part)
52a to 52d crease line (first crease line, second crease line, third crease line, fourth crease line)
52a1, 52b1, 52c1, 52d1 Recessed portions 52a2, 52b2, 52c2, 52d2 Convex portion 60 Insulating plate 61 Side surfaces 62, 63 End portions (inner diameter side end portions, outer diameter side end portions)
64 convex portion 65 concave portion 80 end insulating member 81 inner wall member (first member)
82 Outer wall member (second member)
82a Inner peripheral surface 83 Connecting member 100 Sheet 100A, 100B Surface (first surface, second surface)
100a to 100d edge (first edge, second edge, third edge, fourth edge)
200 Crease line forming devices 210a, 210b, 210c, 210d Crease line forming means (first crease line forming means, second crease line forming means, third crease line forming means, fourth crease line forming means)
210a1, 210b1, 210c1, 210d1 Concavity forming members 210a2, 210b2, 210c2, 210d2 Convex forming members 215, 315, 335, 345, 415, 425 Heating means 216, 316, 336, 346, 416, 426 Temperature detecting means 300 End Partial folding device 310 Sheet support member 311 Sheet support surfaces 311a, 311b Edges (first edge, second edge)
312 and 313 inclined surface (first inclined surface, second inclined surface)
320 End portion pressing member 321 Main body portion 322, 323 Pressing portion (first pressing portion, second pressing portion)
330, 340 End part bending member (first end part bending member, second end part bending member)
331, 341 processing surface (first processing surface, second processing surface)
400 Middle part bending apparatus 410, 420 End part support member (first end part support member, second end part support member)
412, 422 End part position restricting members (first end part position restricting member, second end part position restricting member)
413, 423 Intermediate part position restricting member (first intermediate part position forming member, second intermediate part position restricting member)
430 Intermediate part pressing member 440 Intermediate part supporting member

Claims (12)

An insulating sheet manufacturing method for manufacturing an insulating sheet disposed around an insulating plate for insulating a stator winding wound around each adjacent tooth,
With the temperature of the sheet adjusted within a range of 60 degrees to 90 degrees , the sheet has a first end portion, a first intermediate portion, a second intermediate portion, a third intermediate portion, and the like along one direction. A first step of forming a first crease line, a second crease line, a third crease line, and a fourth crease line that segment into a second end portion;
In a state where the temperature of the sheet is adjusted within a range of 60 degrees to 90 degrees , the first end portion is arranged along the first fold line with the first end portion and the first intermediate portion. Is bent to one side in the sheet thickness direction so that the angle between the second end portion and the second fold line is along the fourth fold line . A second step of bending to the one side in the sheet thickness direction so that an angle between an end portion and the third intermediate portion is within a range of 20 degrees to 40 degrees ;
The sheet is supported so that the expansion of the space between the bent first end portion and the second end portion is restricted in a state where the temperature of the sheet is adjusted within a range of 60 to 90 degrees. The second intermediate portion on the surface on the other side in the sheet thickness direction is pressed against the one side in the sheet thickness direction by the intermediate portion pressing member, and the intermediate portion pressing member is further pressed on the other side in the sheet thickness direction. A space between the first intermediate portion and the third intermediate portion, with the first intermediate portion and the third intermediate portion being in contact with the second intermediate portion of the side surface. the presses so decrease the first intermediate portion, with bent to the other side of the sheet thickness direction along said second fold line, said third intermediate portion of the third fold line A third portion bent along the line toward the other side in the sheet thickness direction. Comprising the step,
An insulating sheet manufacturing method comprising manufacturing an insulating sheet having a trapezoidal cross section formed by the first intermediate portion, the second intermediate portion, and the third intermediate portion. An insulating sheet manufacturing method according to claim 1,
In the first step, the first surface in the sheet thickness direction is recessed to form a concave portion, and the other surface in the sheet thickness direction is protruded to form a convex portion. Forming one crease line and the fourth crease line, projecting the surface on the one side in the sheet thickness direction to form a convex portion, and denting the surface on the other side in the sheet thickness direction A method for producing an insulating sheet, wherein the second crease line and the third crease line are formed by forming a recess. An insulating sheet manufacturing method according to claim 1 or 2 ,
The first end portion and the second end portion are bent in the second step, and the first intermediate portion and the third intermediate portion are bent in the third step. An insulating sheet manufacturing method, characterized in that the method is performed in an atmosphere to which is applied. An insulating sheet manufacturing apparatus for manufacturing an insulating sheet disposed around an insulating plate that insulates a stator winding wound around each adjacent tooth,
A crease line forming device, an end portion bending device, an intermediate portion bending device and a temperature control device;
The crease line forming device includes a sheet having a first edge and a second edge that are separated along one direction, a first end portion, a first intermediate portion, and a second edge along the one direction. The first crease line, the second crease line, the third crease line, and the fourth crease line that are divided into an intermediate portion, a third intermediate portion, and a second end portion of the sheet can be formed on the sheet. And
The end portion folding device bends the first end portion to one side in the sheet thickness direction along the first crease line, and the second end portion to the fourth crease line. And is configured to bend along the one side in the sheet thickness direction,
The intermediate part bending apparatus has a first end part support member, a second end part support member, and an intermediate part pressing member,
The first end portion supporting member and the second end portion supporting member are formed by the first end portion of the sheet, the first end portion and the second end portion being bent by the end portion bending device. And at least one of the second edge and the second edge can be supported, and at least one of the second edge and the second edge can be moved in a direction toward and away from each other.
The intermediate part pressing member is in a state where the first edge part and the second edge part of the sheet are supported by the first end part support member and the second end part support member, respectively. The second intermediate portion of the surface on the other side in the sheet thickness direction is configured to be able to press the one side in the sheet thickness direction,
In the state where the first edge portion and the second edge portion of the sheet are supported by the first end portion support member and the second end portion support member that are disposed apart from each other, By pressing the second intermediate portion of the surface on the other side in the sheet thickness direction against the one side in the sheet thickness direction by the intermediate portion pressing member, the second intermediate portion is moved to the first end. In a state of pressing between the partial support member and the second end partial support member, and further contacting the intermediate partial pressing member to the second intermediate portion of the surface on the other side in the sheet thickness direction, By moving the first end portion supporting member and the second end portion supporting member in a direction approaching each other, the first intermediate portion is moved in the sheet thickness direction along the second fold line. Bend to the other side and Is configured to bend to the other side of the sheet thickness direction along the intermediate portion to said third fold line,
The temperature adjusting device includes: a temperature of the sheet when forming the first crease line, the second crease line, the third crease line, and the fourth crease line; and the first end portion; The temperature of the sheet when folding the second end portion, the temperature of the sheet when folding the first intermediate portion and the third intermediate portion, can be adjusted,
An insulating sheet manufacturing apparatus for manufacturing an insulating sheet having a trapezoidal cross section formed by the first intermediate portion, the second intermediate portion, and the third intermediate portion. It is an insulation sheet manufacturing apparatus of Claim 4 , Comprising:
The intermediate part bending apparatus further includes an intermediate part support member,
When the second intermediate portion is pushed between the first end portion supporting member and the second end portion supporting member, the second intermediate portion on the one side surface in the sheet thickness direction is The second intermediate part on the surface on the other side in the sheet thickness direction is pressed against the one side in the sheet thickness direction by the intermediate part pressing member while being supported by the intermediate part support member. Insulation sheet manufacturing equipment. It is an insulation sheet manufacturing apparatus of Claim 4 or 5 ,
The crease line forming device forms first crease line forming means for forming the first crease line, second crease line forming means for forming the second crease line, and forming the third crease line. A third crease line forming means and a fourth crease line forming means for forming the fourth crease line;
The first crease line forming means is disposed on the one side in the sheet thickness direction with the sheet interposed therebetween, and a first recess that forms a recess by recessing the surface of the one side in the sheet thickness direction. A forming member and a first convex portion forming member that is disposed on the other side in the sheet thickness direction and forms a convex portion by projecting the surface of the other side in the sheet thickness direction;
The second crease line forming means is disposed on the one side in the sheet thickness direction with the sheet interposed therebetween, and forms a convex portion by projecting the surface on the one side in the sheet thickness direction. Consists of a convex portion forming member and a second concave portion forming member that is disposed on the other side in the sheet thickness direction and that forms a concave portion by recessing the surface of the other side in the sheet thickness direction,
The third crease line forming means is arranged on the one side in the sheet thickness direction with the sheet sandwiched therebetween, and forms a convex portion by projecting the surface on the one side in the sheet thickness direction. Consists of a convex part forming member and a third concave part forming member that is disposed on the other side in the sheet thickness direction and that forms a concave part by recessing the surface of the other side in the sheet thickness direction,
The fourth crease line forming means is arranged on the one side in the sheet thickness direction across the sheet, and a fourth recess that forms a recess by recessing the surface of the one side in the sheet thickness direction. It is comprised by the 4th convex part formation member which is arrange | positioned on the said other side of a sheet | seat thickness direction, and forms the convex part by making the surface of the said other side of a sheet | seat thickness direction protrude. Insulating sheet manufacturing equipment. It is an insulation sheet manufacturing apparatus in any one of Claims 4-6 ,
The end portion bending apparatus has a sheet support member, a first processing surface, and a second processing surface,
The sheet support member has a sheet support surface that supports the sheet, a first inclined surface that is inclined with respect to the sheet support surface, and a second inclined surface,
In a state where the sheet is supported on the sheet support surface, seen in a cross section along the one direction,
The sheet support surface is configured to be able to support the sheet at a position where the first crease line and the fourth crease line respectively face one edge and the other edge of the sheet support surface. ,
The first inclined surface is inclined from the one edge of the sheet support surface to the one side in the sheet thickness direction,
The second inclined surface is inclined from the other edge of the sheet supporting surface to the one side in the sheet thickness direction,
The first processed surface is formed in parallel with the first inclined surface and is configured to be movable in a direction approaching the first inclined surface and a direction away from the first inclined surface. And
The second processed surface is formed in parallel with the second inclined surface, and is configured to be movable in a direction approaching the second inclined surface and a direction separating from the second inclined surface. And
The sheet is opposed to the sheet support surface of the sheet support member such that the first crease line and the fourth crease line face the one edge portion and the other edge portion of the sheet support surface, respectively. The first end portion is bent along the first crease line by pressing the first end portion against the first inclined surface by the first processing surface in the disposed state. The second end portion is bent along the fourth fold line by pressing the second end portion against the second inclined surface by the second processed surface. Sheet manufacturing equipment. The insulating sheet manufacturing apparatus according to claim 7 ,
The angle between the sheet support surface and the first inclined surface and the angle between the sheet support surface and the second inclined surface are set within a range of 20 degrees to 40 degrees. Insulating sheet manufacturing equipment. An insulating sheet manufacturing apparatus according to any one of claims 4-8,
The said temperature control apparatus adjusts the temperature of the said sheet | seat in the range of 60 to 90 degree | times, The insulating sheet manufacturing apparatus characterized by the above-mentioned. An insulating sheet manufacturing apparatus according to any one of claims 4-9,
It is equipped with a static eliminator that removes static electricity.
The bending of the first end portion and the second end portion and the bending of the first intermediate portion and the third intermediate portion are performed in an atmosphere in which static electricity is removed by the static eliminator. An insulating sheet manufacturing apparatus comprising the insulating sheet manufacturing apparatus. A plurality of teeth disposed along the circumferential direction, a plurality of slots formed by adjacent said teeth, and stator windings are wound on each of the teeth, wound on each said teeth adjacent A stator comprising an insulating plate for insulating a stator winding and an insulating sheet disposed around the insulating plate,
The stator using the insulating sheet manufactured by the insulating sheet manufacturing apparatus in any one of Claims 4-10 as the said insulating sheet. An electric motor comprising a stator and a rotor that is rotatably supported with respect to the stator,
An electric motor, wherein the stator according to claim 11 is used as the stator.

Images