Insulation paper insertion device and method for manufacturing insulation structure

Abstract

To provide a technique capable of smoothly inserting insulation paper into a slot of a stator core.SOLUTION: A nozzle mechanism includes therein a passage through which insulation paper passes. The insulation paper covers a wall surface of a slot. The slot is part of a wall surface of a first side surface on a first side in a circumferential direction of first teeth and a second side surface on a second side in the circumferential direction of second teeth. A pusher moves the passage from a third side to a fourth side in a shaft direction in a state of sandwiching the insulation paper together with an inner surface of the passage, and moves the insulation paper from the third side to the fourth side in the shaft direction. The nozzle mechanism includes a first mechanism and a second mechanism. The first mechanism has a first passage of the passages therein. The first passage includes an inlet for the insulation paper. The second mechanism has a second passage of the passages therein. The second passage includes an outlet of the insulation paper and is connected to the first passage. The second mechanism is switched between a first state and a second state. In the first state, the insulation paper is supported from a fifth side in the first direction, and in the second state, the insulation paper is not supported from the fifth side in the first direction.SELECTED DRAWING: Figure 12

Description

[Technical Field]

[0001] The present invention relates to an insulating paper insertion device that inserts insulating paper into slots in a stator core of a stator of a rotating machine, and to a manufacturing method of an insulating structure that is performed by the insulating paper insertion device. [Background technology]

[0002] Patent Document 1 discloses an insulating paper installation device for a stator core. The insulating paper installation device uses a blade to insert and shape insulating paper into a slot in a stator core, installing the insulating paper in the slot to a desired shape. The blade has an adsorption portion and a shaping portion. The blade is erected with one end connected to the surface of a base portion. The adsorption portion is inserted into the slot. The adsorption portion has a suction portion that can generate negative pressure between the adsorption portion and the insulating paper, and this suction portion adsorbs the insulating paper. The insulating paper is wrapped around the adsorption portion. The shaping portion shapes the opening of the insulating paper inserted into the slot. The shaping portion is located near the second end opposite the first end of the adsorption portion. The shaping portion has a shape that expands in diameter from the first end to the second end. An insulating paper installation method using the insulating paper installation device includes a winding process, an adsorption portion insertion process, an adsorption release process, an opening shaping process, and a removal process. The winding process involves wrapping the insulating paper around the adsorption portion. The suction part insertion process inserts the suction part with the insulating paper attached into the slot. The suction release process releases the suction of the suction part and places the insulating paper in the slot. The mouth forming process moves the blade in the insertion direction and the forming part expands the diameter of the mouth part of the insulating paper. The removal process removes the blade (suction part and forming part) from the slot. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-118638 Summary of the Invention [Problem to be solved by the invention]

[0004] Rotating machines have been put into practical use. Examples of rotating machines include electric motors and generators. A rotating machine includes a stator. The stator includes a stator core, a coil, and insulating paper. The stator core is formed by laminating steel plates and includes an annular yoke and a plurality of teeth. The stator core has a slot between two circumferentially adjacent teeth. The slot accommodates a coil. Insulating paper is inserted into the slot. The insulating paper covers the wall surfaces that form the slot within the slot. The insulating paper electrically insulates the stator core from the coil. In this description, a structure in which insulating paper is provided in the slot is referred to as an "insulating structure."

[0005] The inventors have studied techniques for smoothly inserting insulating paper into slots in a stator core. In this study, the inventors have considered the following method for inserting insulating paper into slots. In this insertion method, the insulating paper is fed into the stator core from the third side toward the fourth side in the axial direction of the rotating shaft of the rotor of a rotating machine. The insulating paper is inserted into the slot from the third side toward the fourth side in the axial direction of the stator core. The insulating paper may include a cuff. The cuff has an insulating structure and is provided on the third side in the axial direction of the stator core. The cuff hooks the insulating paper onto the opening edge of the slot on the third side in the axial direction of the stator core. The cuff has a configuration in which a sheet material is bent toward the fourth side in the axial direction. In the insulating paper, the thickness of the cuff is thicker than the thickness of the single-layer region. The single-layer region of the insulating paper forms the fourth side in the axial direction from the cuff with the insulating paper. In the single-layer region of the insulating paper, the sheet material does not overlap. The single-layer region of the insulating paper forms an insulating structure and covers the following two side surfaces and the peripheral surface of the yoke. The two side surfaces are a first circumferential side surface of the first tooth of the two teeth that form the slot, and a second circumferential side surface of the second tooth of the two teeth. The first and second side surfaces are connected in the circumferential direction by the peripheral surface of the yoke.

[0006] An object of the present invention is to provide a technique that enables smooth insertion of insulating paper into slots in a stator core. [Means for solving the problem]

[0007] According to one aspect of the present invention, there is provided a nozzle mechanism provided in a slot of the stator core, the slot having as its wall surface a first side surface on a first side in a circumferential direction of a first tooth of a stator core of a stator of the rotating machine, the first side surface being on a first side in the circumferential direction of the first tooth, and a second side surface on a second side in the circumferential direction of a second tooth of the stator core that is circumferentially adjacent to the first tooth on the first side of the circumferential direction of the first tooth, the nozzle mechanism having an internal passage through which insulating paper passes, the insulating paper covering a wall surface of the slot including the first side surface and the second side surface; and a pusher that moves the passage from a third side to a fourth side in an axial direction of the rotating shaft while sandwiching the insulating paper together with an inner surface of the passage, and moves the insulating paper from the third side to the fourth side in the axial direction, an insulating paper insertion device in which an insulating structure provided in a slot supports the insulating paper passing through the passage from a fifth side where the wall of the slot is located relative to the insulating paper in a first direction in which the insulating paper and the wall of the slot are adjacent; the pusher supports the insulating paper passing through the passage from a sixth side in the first direction on an outer surface of the pusher; the nozzle mechanism includes a first mechanism having a first passage therein that includes an inlet for the insulating paper at a third side end in the axial direction, and a second mechanism having a second passage therein that includes an outlet for the insulating paper at a fourth side end in the axial direction and connects to the fourth side end of the first passage in the axial direction, and the second mechanism is switchable between a first state in which the insulating paper is supported from the fifth side in the first direction and a second state in which the insulating paper is not supported from the fifth side in the first direction.

[0008] This insulating paper insertion device allows the shape of the outlet to be narrowed relative to the slot. The insulating paper can be inserted into the slot through the outlet while moving the insulating paper through the passage from the third side to the fourth side in the axial direction. The insulating paper is pushed to the same axial side by a pusher moving from the third side to the fourth side in the axial direction. Consider an insulating paper insertion device of a comparative example. In this insulating paper insertion device of the comparative example, the outlet is narrowed relative to the slot. This outlet has the same shape as outlet 44 in the first state. However, in this insulating paper insertion device of the comparative example, the passage portion including the outlet does not switch to the second state. This passage portion corresponds to the second passage of the second mechanism. In this insulating paper insertion device of the comparative example, when the insulating paper passes through the outlet, resistance that prevents the insulating paper from passing through the outlet increases. This resistance increases as the shape of the outlet is narrowed relative to the slot. In the insulating paper insertion device described above, by setting the second mechanism to the second state, it is possible to prevent such resistance from occurring in the insulating paper or reduce such resistance occurring in the insulating paper. When the insulating paper is pushed from the third side to the fourth side in the axial direction by a pusher that moves from the third side to the fourth side in the axial direction, clogging and / or buckling of the insulating paper at or near the outlet can be prevented.

[0009] The second mechanism may include a first support piece that corresponds to support from a fifth side in the first direction of a first insulating region of the insulating paper that covers the first side surface, and a second support piece that is arranged adjacent to the first support piece and corresponds to support from the fifth side in the first direction of a second insulating region of the insulating paper that covers the second side surface, the first support piece including a first groove in a first support surface facing the second support piece, and the second support piece including a second groove in a second support surface facing the first support surface, the first groove and the second groove forming the second passage, the second mechanism opening and closing the first support piece and the second support piece in a second direction that is perpendicular to the axial direction and in which the first support surface and the second support surface approach and move away from each other, and in the second state, switching to a state in which the distance between the first support surface and the second support surface is wider than the distance between the first support surface and the second support surface in the first state.

[0010] With this configuration, the first support piece can support the first insulating region of the insulating paper from the fifth side in the first direction, and the second support piece can support the second insulating region of the insulating paper from the fifth side in the first direction. The second mechanism can be switched between a first state and a second state by opening and closing the first support piece and the second support piece. The second mechanism can be set to the first state by closing the first support piece and the second support piece. The second mechanism can be set to the second state by opening the first support piece and the second support piece.

[0011] The second mechanism may open and close the first support piece and the second support piece in the second direction that coincides with the radial direction centered on the rotation axis and is perpendicular to an imaginary line passing through the circumferential center of the slot.

[0012] With this configuration, the second direction can correspond to the circumferential direction, and the first support piece and the second support piece can be opened and closed in the second direction corresponding to the circumferential direction.

[0013] The first mechanism may include a first oscillation shaft that serves as the center of oscillation of the first support piece, which opens and closes the first support piece and the second support piece in the second direction, and a second oscillation shaft that serves as the center of oscillation of the second support piece, which opens and closes the first support piece and the second support piece in the second direction, and the first support piece may be supported by the first oscillation shaft, and the second support piece may be supported by the second oscillation shaft.

[0014] With this configuration, the first support piece can be swung around the first swing shaft, and the second support piece can be swung around the second swing shaft. The first support piece and the second support piece can be opened and closed by the swinging of the first support piece and the swinging of the second support piece.

[0015] Another aspect of the present invention is a method for manufacturing an insulating structure, which is performed by any of the insulating paper insertion devices described above, and includes an insertion step of inserting the insulating paper into the slot, wherein in the insertion step, the second mechanism is in the first state when the pusher starts to move from the third side to the fourth side in the axial direction, and switches from the first state to the second state when the pusher moves from the third side to the fourth side in the axial direction and reaches a set axial position.

[0016] According to this method for manufacturing an insulating structure, the insulating paper insertion device can insert insulating paper into the slot while performing the above-mentioned functions. [Effects of the Invention]

[0017] According to the present invention, the insulating paper can be smoothly inserted into the slots of the stator core. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 2 is a plan view illustrating an example of a stator core. [Figure 2] 2 is a perspective view showing a part of the stator core of FIG. 1. The illustrated range of the stator core corresponds to part A of FIG. [Figure 3] 1 is a perspective view showing an example of an insulating structure, and the stator core corresponds to the stator core in FIG. 1. The illustrated range of the stator core corresponds to part A in FIG. [Figure 4] 1A and 1B are perspective views showing an example of insulating paper and a pusher. The pusher is shown with a portion thereof omitted. (A) shows the state as viewed from the third side in the axial direction, the second side in the circumferential direction (the eighth side in the second direction), and the center side in the radial direction. (B) shows the state as viewed from the third side in the axial direction, the first side in the circumferential direction (the seventh side in the second direction), and the center side in the radial direction. [Figure 5] FIG. 2 is a perspective view showing an example of an insulating paper insertion device. [Figure 6] 1 is a perspective view showing an example of a nozzle mechanism, the nozzle mechanism being viewed from a third side in an axial direction, a first side in a circumferential direction, and a center side in a radial direction; [Figure 7] 1 is a perspective view showing an example of a nozzle mechanism, showing the nozzle mechanism as viewed from a fourth axial side, a first circumferential side, and a center radial side, with the left side showing a second mechanism of the nozzle mechanism in a first state and the right side showing the second mechanism of the nozzle mechanism in a second state. [Figure 8] 6 is a cross-sectional view showing an example of a nozzle mechanism, the left side showing a second mechanism of the nozzle mechanism in a first state, and the right side showing the second mechanism of the nozzle mechanism in a second state. The cross-sectional position corresponds to line BB in FIG. [Figure 9] 1. The stator core corresponds to the stator core in FIG. 1. The illustrated range of the stator core corresponds to part A in FIG. 1. [Figure 10] 1. The stator core corresponds to the stator core in FIG. 1. The illustrated range of the stator core corresponds to part A in FIG. 1. [Figure 11] 6A and 6B are cross-sectional views showing the third and fourth stages of the insertion process of the manufacturing method of the insulating structure. The cutting position of the nozzle mechanism corresponds to line BB in FIG. 6. The cutting position of the stator core corresponds to the cutting position of this nozzle mechanism when the stator core is supported by the insulating paper insertion device. The stator core corresponds to the stator core in FIG. 1. The illustrated range of the stator core corresponds to part A in FIG. 1. [Figure 12] 6A and 6B are cross-sectional views showing the fifth and sixth steps of the insertion process of the manufacturing method of the insulating structure. The cutting position of the nozzle mechanism corresponds to line BB in FIG. 6. The cutting position of the stator core corresponds to the cutting position of the nozzle mechanism when the stator core is supported by the insulating paper insertion device. The stator core corresponds to the stator core in FIG. 1. The illustrated range of the stator core corresponds to part A in FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0019] Embodiments for carrying out the present invention will be described using the drawings. The present invention is not limited to the configurations described below, and various configurations can be adopted within the same technical concept. For example, some of the configurations shown below may be omitted or replaced with other configurations. The present invention may also include other configurations. The drawings are explanatory diagrams for understanding the present invention and are different from design drawings. Each drawing may not correspond exactly to other drawings. Hatching indicates a cross section. Dashed lines are hidden lines.

[0020] <Stator core 85> The stator core 85 will be described with reference to Figures 1 and 2. The stator core 85 forms a stator of a rotating machine. Examples of rotating machines include motors and generators. Motors and generators as rotating machines are mounted in various products. The product may be a device. Examples of products include electrical equipment and vehicles. The electrical equipment may be for either home or industrial use. The rotating machine is a motor, and the vehicle is an electric vehicle. In this case, the electric vehicle may use this motor as a driving source. Examples of electric vehicles include electric cars, electric bicycles, electric wheelchairs, electric carts, and electric food delivery carts. Electric vehicles include hybrid cars.

[0021] The stator core 85 is formed by punching steel plates with a press and then stacking the punched steel plates. In the stator core 85, the direction in which the steel plates are stacked coincides with the axial direction of the rotor's rotation shaft. An example of the steel plates is electromagnetic steel plate. In the embodiment, a stator core 85 for a stator of an internal rotor type rotating machine is taken as an example. In an internal rotor type rotating machine, the rotor is provided inside the stator. In the embodiment, the rotor is not shown. In the embodiment, one side in the axial direction is referred to as the "third side," and the other side in the axial direction opposite to the third side is referred to as the "fourth side."

[0022] The stator core 85 includes a yoke 86 and a plurality of teeth 88 (see FIG. 1). The yoke 86 has an annular shape. The plurality of teeth 88 are arranged at equal angular intervals around the yoke 86 in the circumferential direction and protrude radially. The circumferential and radial directions are centered on the rotor's rotational axis. The rotor rotates in the circumferential direction. The circumferential direction includes the rotor's rotational direction and the opposite direction. In the embodiment, one side in the circumferential direction is referred to as the "first side," and the other side in the circumferential direction opposite the first side is referred to as the "second side." The radial direction corresponds to the radial direction centered on the rotor's rotational axis. The "+" shown at the center of the stator core 85 in FIG. 1 corresponds to the position of the axis of the rotor's rotational axis. The center line C shown by a dashed line in FIG. 2 indicates the axis of the rotor's rotational axis. In an internal rotor type rotating machine, the teeth 88 are arranged on a peripheral surface 87 on the radially central side of the yoke 86 and protrude radially toward the center (see FIGS. 1 and 2). A peripheral surface 87 on the radially central side of the yoke 86 forms the inner peripheral surface of the yoke 86 .

[0023] A plurality of slots 93 are formed in the stator core 85 (see FIG. 1). The number of slots 93 is the same as the number of teeth 88. The slots 93 are formed between two circumferentially adjacent teeth 88. The slots 93 accommodate coils provided on the teeth 88. Insulating paper 80 is provided in the slots 93. The coils are provided on the teeth 88 via the insulating paper 80. In the embodiment, the coils are not shown in the drawings. The insulating paper 80 will be described later.

[0024] The stator core 85 includes 48 teeth 88 (see FIG. 1). The 48 teeth 88 are evenly arranged circumferentially at angular intervals of 7.5° on the inner surface of the yoke 86. The stator core 85 has 48 slots 93 formed therein. The 48 slots 93 have the same shape. However, the number of teeth 88, the arrangement of the teeth 88, and the number of slots 93 in the stator core 85 are examples. The number of teeth 88 and the arrangement of the teeth 88 are determined appropriately taking into consideration various conditions. The number of slots 93 is equal to the number of teeth 88.

[0025] In the embodiment, two teeth 88 forming one slot 93 are referred to as "first teeth 89" and "second teeth 91" (see FIGS. 1 and 2). The second teeth 91 are provided on a first circumferential side of the first teeth 89. In other words, the first teeth 89 are provided on a second circumferential side of the second teeth 91. The slots 93 open at the following positions. This position is on the radial center side and includes the circumferential center of the slots 93. Between the first circumferential side portions of the tips of the first teeth 89 and the second circumferential side portions of the tips of the second teeth 91, openings of a constant width are provided in the circumferential direction over the entire area in the stacking direction (see FIG. 2). In the embodiment, these openings are referred to as "slot openings 94" (see FIGS. 1 and 2). In an internal rotor type rotating machine, the tips of the first teeth 89 are on the radial center side of the first teeth 89, and the tips of the second teeth 91 are on the radial center side of the second teeth 91.

[0026] The slots 93 are formed with a first side surface 90 on a first circumferential side of the first teeth 89 and a second side surface 92 on a second circumferential side of the second teeth 91 as part of their wall surfaces. Furthermore, the wall surfaces of the slots 93 include first circumferential surfaces of the first teeth 89, second circumferential surfaces of the second teeth 91, and a circumferential surface 87 of the yoke 86. The first circumferential surfaces of the first teeth 89 form the radially outer circumferential surface of the first circumferential side portions of the tips of the first teeth 89. The first circumferential surfaces of the first teeth 89 are continuous with the radial center side of the first side surface 90 of the first teeth 89. The second circumferential surfaces of the second teeth 91 form the radially outer circumferential surface of the second circumferential side portions of the tips of the second teeth 91. The second circumferential surfaces of the second teeth 91 are continuous with the radial center side of the second side surface 92 of the second teeth 91. First side surfaces 90 of the first teeth 89 and second side surfaces 92 of the second teeth 91 are connected in the circumferential direction by a peripheral surface 87 of the yoke 86 on the radially outer side.

[0027] In Fig. 1, the reference numeral "88" is assigned to two arbitrarily selected circumferentially adjacent teeth, and in Figs. 1 and 2, the reference numeral "89" for the first tooth and the reference numeral "91" for the second tooth are written together with the reference numeral "88." That is, in Figs. 1 and 2, the two circumferentially adjacent teeth (the first tooth and the second tooth) are assigned the reference numerals "89 (88)" and "91 (88)." The slot formed between the two teeth 88 identified as the first tooth 89 and the second tooth 91 is assigned the reference numeral "93." Furthermore, the "circumferential surface" of the yoke 86 that forms this slot 93 is assigned the reference numeral "87," the "first side surface" of the first tooth 89 is assigned the reference numeral "90," the "second side surface" of the second tooth 91 is assigned the reference numeral "92," and the "slot opening" of this slot 93 is assigned the reference numeral "94."

[0028] The stator core 85 is similar to known stator cores, and therefore, further description of the stator core 85 will be omitted.

[0029] <Insulating paper 80> The insulating paper 80 will be described with reference to FIGS. 2 to 4. The insulating paper 80 is provided in a slot 93 (see FIG. 3). In the stator of a rotating machine, coils are provided on teeth 88. A portion of the coil is accommodated in the slot 93. The insulating paper 80 is interposed between the stator core 85 and the coil in the slot 93 in the following state. In this state, the coil is provided on the tooth 88, and a portion of the coil is accommodated in the slot 93. In the embodiment, a structure in which the insulating paper 80 is provided in the slot 93 is referred to as an "insulating structure 95." In the insulating structure 95, the insulating paper 80 covers the wall surface of the slot 93. The insulating paper 80 electrically insulates the stator core 85 and the coil. The insulating paper 80 can be made of a conventionally known material. An example of a material for the insulating paper 80 is polyethylene naphthalate (PEN). The material for the insulating paper 80 is determined appropriately taking various conditions into consideration.

[0030] The insulating paper 80 has a cylindrical shape that conforms to the wall surface of the slot 93 (see FIGS. 2 to 4). The insulating paper 80 is formed by folding a sheet material. The sheet material has the shape of the insulating paper 80 when unfolded. A space S is formed inside the insulating paper 80 (see FIGS. 3 and 4). In this embodiment, the insulating paper 80 includes a first insulating region R1, a second insulating region R2, a third insulating region R3, and a fourth insulating region (see FIG. 4). The first insulating region R1, the second insulating region R2, the third insulating region R3, and the fourth insulating region form an outer peripheral wall of the cylindrical insulating paper 80 that surrounds the space S. The first insulating region R1 covers the first side surface 90 of the first tooth 89 with an insulating structure 95 (see FIGS. 2 and 3). The second insulating region R2 covers the second side surface 92 of the second tooth 91 with an insulating structure 95. The third insulating region R3 covers the first peripheral surface of the first tooth 89 and the second peripheral surface of the second tooth 91 with an insulating structure 95. Furthermore, the third insulating region R3 closes the slot opening 94 with an insulating structure 95. The fourth insulating region covers the peripheral surface 87 of the yoke 86 with an insulating structure 95. In this embodiment, the fourth insulating region is not shown.

[0031] When the insulating paper 80 has a cylindrical shape, both end portions of the sheet material on one side and the other side in the width direction overlap radially in the third insulating region R3 (see FIG. 4 ). In other words, the third insulating region R3 has both end portions of the sheet material on one side and the other side in the width direction overlap radially. The width direction of the sheet material corresponds to the direction in which the first circumferential surfaces of the first teeth 89, the first side surfaces 90 of the first teeth 89, the circumferential surfaces 87 of the yoke 86, the second side surfaces 92 of the second teeth 91, and the second circumferential surfaces of the second teeth 91 are connected at the wall surfaces of the slots 93. The insulating paper 80 may have a shape other than a cylindrical shape. The insulating paper 80 may have a groove-like shape in which the sheet material does not overlap in the following region. This region corresponds to the slot opening 94 of the insulating paper 80. The insulating paper 80 includes a cuff 81. The cuff 81 is provided on a third axial side of the stator core 85 in the insulating structure 95. The cuff 81 serves to catch the insulating paper 80 against the opening edge of the slot 93 on the third axial side of the stator core 85. The cuff 81 is formed by folding a sheet material toward the fourth axial side. The folded edge of the cuff 81 forms the third axial end of the insulating paper 80.

[0032] The cuff 81 has a configuration in which sheets of material are overlapped. In the insulating paper 80, the thickness of the cuff 81 is thicker than the thickness of the single-layer region. The single-layer region of the insulating paper 80 forms a fourth axial side of the cuff 81 in the insulating paper 80. In the single-layer region of the insulating paper 80, the sheets of material do not overlap. The single-layer region of the insulating paper 80 covers the first side 90 of the first tooth 89, the second side 92 of the second tooth 91, and the peripheral surface 87 of the yoke 86 with an insulating structure 95.

[0033] The insulating paper 80 is similar to known insulating paper, and therefore further description of the insulating paper 80 will be omitted.

[0034] <Insulating paper inserting device 10> The insulating paper insertion device 10 will be described with reference to Figures 1 to 12. The insulating paper insertion device 10 executes a manufacturing method for the insulating structure 95. The insulating paper insertion device 10 is a manufacturing device for the insulating structure 95. The manufacturing method for the insulating structure 95 includes an insertion process. The insertion process involves inserting insulating paper 80 into the slot 93. The insulating paper insertion device 10 includes a support device 20, a nozzle mechanism 30, and a pusher 70 (see Figure 5). In addition, the insulating paper insertion device 10 includes a movement mechanism 76 and a position sensor. However, in the embodiment, the position sensor is not explicitly shown in the drawings. In Figure 5, the multiple steel plates that form the stator core 85 are not shown.

[0035] In the embodiment, a structure in which the insulating paper 80 is provided in the slot 93 is referred to as an "insulating structure 95" (see FIG. 3). In the embodiment, the axial, circumferential, and radial directions are based on the state shown in FIG. 5. In the state shown in FIG. 5, the stator core 85 is supported by the insulating paper insertion device 10. In the embodiment, to identify the insulating paper insertion device 10, the terms "first direction" and "second direction" are used in addition to the axial, circumferential, and radial directions (see FIGS. 6 to 12). The first and second directions are perpendicular to the axial direction. In the insulating structure 95, the insulating paper 80 and the wall surfaces of the slot 93 are adjacent in the first direction. The first direction coincides with the thickness direction of the insulating paper 80. The thickness direction of the insulating paper 80 can also be referred to as the thickness direction of the sheet material. One side in the first direction is referred to as the "fifth side," and the other side in the first direction opposite the fifth side is referred to as the "sixth side." In the insulating structure 95, the wall surface of the slot 93 is located on the fifth side in the first direction relative to the insulating paper 80. When the slot 93 is viewed from above from the third side in the axial direction, the fifth side in the first direction is the wall side of the slot 93, and the sixth side in the first direction is the center side of the slot 93. The second direction is perpendicular to the next imaginary line L. This imaginary line L coincides with the radial direction and passes through the circumferential center of the slot 93 (see FIGS. 1 and 2). In this embodiment, the seventh side in the second direction corresponds to the first side in the circumferential direction, and the eighth side in the second direction corresponds to the second side in the circumferential direction (see FIGS. 4, and 6 to 12).

[0036] The support device 20 supports the stator core 85 in the following state (see FIG. 5). In this state, the circumferential and radial positions of the slots 93 are aligned with respect to the nozzle mechanism 30 and the pusher 70 (see FIGS. 11 and 12). The support device 20 rotates the stator core 85. The support device 20 includes a drive source. This drive source generates a drive force that rotates the stator core 85. An example of the drive source is a servo motor. The servo motor may include an encoder.

[0037] The support device 20 intermittently rotates the stator core 85 at the following rotation angles. The rotation angle in one rotation is set to "360° divided by the number of slots 93." Assume that there are 48 slots 93 (see FIG. 1). In this case, the support device 20 rotates the stator core 85 by 7.5° in one rotation. This allows all slots 93 to be aligned circumferentially and radially with respect to the nozzle mechanism 30 and the pusher 70. In the insertion step of the manufacturing method for the insulating structure 95, the rotation of the stator core 85 by the support device 20 is alternately repeated with the insertion of the insulating paper 80 into the slots 93 (see "First Step to Seventh Step" in FIGS. 9 and 10). The insertion of the insulating paper 80 into the slots 93 will be described later. The insulating paper insertion device 10 can employ a support device similar to a known insulating paper insertion device as the support device 20. Therefore, further description of the support device 20 will be omitted.

[0038] The nozzle mechanism 30 includes a first mechanism 50 and a second mechanism 60 (see FIGS. 5 to 8). The nozzle mechanism 30 has a passage 40 therein (see FIGS. 6 to 8). The passage 40 includes a first passage 41 and a second passage 42. The first mechanism 50 has a first passage 41 therein. The second mechanism 60 has a second passage 42 therein. The first passage 41 is continuous at a fourth axial end with a third axial end of the second passage 42. The first passage 41 and the second passage 42 are connected in the axial direction to form the passage 40.

[0039] The insulating paper 80 passes through the passage 40 (see FIGS. 9 to 12). The nozzle mechanism 30 supports the insulating paper 80, which passes through the passage 40 from the fifth side in the first direction, on the inner surface of the passage 40 (see FIGS. 11 and 12). The first passage 41 includes an inlet 43 for the insulating paper 80 at a third axial end, and the second passage 42 includes an outlet 44 for the insulating paper 80 at a fourth axial end (see FIGS. 6 to 8). The third axial end of the first passage 41 forms the third axial end of the passage 40. The fourth axial end of the second passage 42 forms the fourth axial end of the passage 40. The insulating paper 80 is introduced into the passage 40 (first passage 41) from the inlet 43 (see "First Stage to Third Stage" in FIG. 9). The insulating paper 80 passes through the passage 40 (the first passage 41 and the second passage 42) and is led out from the lead-out port 44 toward the slot 93 (see "fourth to sixth stages" in FIGS. 11 and 12).

[0040] The first mechanism 50 includes a first oscillation shaft 51 and a second oscillation shaft 52 (see FIGS. 6 to 8). The second oscillation shaft 52 is provided adjacent to the first oscillation shaft 51 in the second direction. The first oscillation shaft 51 and the second oscillation shaft 52 may be provided along an imaginary straight line L. In the first mechanism 50, the first oscillation shaft 51 is provided on a fourth side in the axial direction of the first mechanism 50 and an eighth side in the second direction, and the second oscillation shaft 52 is provided on the fourth side in the axial direction of the first mechanism 50 and a seventh side in the second direction. Furthermore, in the first mechanism 50, the first oscillation shaft 51 and the second oscillation shaft 52 are provided along the imaginary straight line L.

[0041] The second mechanism 60 includes a first support piece 61 and a second support piece 64 (see FIGS. 6 to 8). The first support piece 61 is supported by the first oscillation shaft 51. The second support piece 64 is supported by the second oscillation shaft 52. The second support piece 64 is provided adjacent to the first support piece 61. The first support piece 61 and the second support piece 64 are adjacent to each other in the second direction. The first support piece 61 is provided on an eighth side in the second direction. The second support piece 64 is provided on a seventh side in the second direction. The first support piece 61 includes a first groove 63 in a first support surface 62. The second support piece 64 includes a second groove 66 in a second support surface 65. The first support surface 62 faces the second support piece 64. The second support surface 65 faces the first support surface 62. The first groove 63 and the second groove 66 form a second passage 42.

[0042] In the nozzle mechanism 30, the first oscillation shaft 51 serves as the center of oscillation of the first support piece 61, and the second oscillation shaft 52 serves as the center of oscillation of the second support piece 64 (see FIG. 8). In the "first state" and "second state" in FIG. 8, the "+" shown at the center of the first oscillation shaft 51 corresponds to the center position of the oscillation of the first oscillation shaft 51, and the "+" shown at the center of the second oscillation shaft 52 corresponds to the center position of the oscillation of the second oscillation shaft 52. The first support piece 61 oscillates around the first oscillation shaft 51. The second support piece 64 oscillates around the second oscillation shaft 52. In the embodiment, the "first state" and "second state" are used to refer to states of the second mechanism 60 associated with the opening and closing of the first support piece 61 and the second support piece 64. The arc-shaped arrow shown on the fourth axial side of the first support piece 61 and the second support piece 64 in the nozzle mechanism 30 in the "first state" in Fig. 8 indicates the direction in which the first support piece 61 and the second support piece 64 each oscillate when the nozzle mechanism 30 is in the second state. The arc-shaped arrow shown on the fourth axial side of the first support piece 61 and the second support piece 64 in the nozzle mechanism 30 in the "second state" in Fig. 8 indicates the direction in which the first support piece 61 and the second support piece 64 each oscillate when the nozzle mechanism 30 is in the first state. The direction in which the first support piece 61 and the second support piece 64 each oscillate corresponds to the second direction.

[0043] As the first support piece 61 and the second support piece 64 swing, the first support surface 62 and the second support surface 65 move closer to and away from each other (see FIGS. 7 and 8). In the second mechanism 60, the first support surface 62 and the second support surface 65 move closer to and away from each other in the second direction. That is, the second mechanism 60 opens and closes the first support piece 61 and the second support piece 64 in the second direction. When the second mechanism 60 is in the first state, the first support piece 61 and the second support piece 64 are closed, and when the second mechanism 60 is in the second state, the first support piece 61 and the second support piece 64 are open. The second mechanism 60 switches from the first state to the second state during the insertion process of the manufacturing method for the insulating structure 95 (first state: see "first state" in FIGS. 7 and 8 and FIGS. 9 and 11; second state: see "second state" in FIGS. 7 and 8 and FIGS. 10 and 12). When in the first state, the second mechanism 60 supports the insulating paper 80 from the fifth side in the first direction. In the second state, the second mechanism 60 does not support the insulating paper 80 from the fifth side in the first direction. When the second mechanism 60 is in the second state, the second mechanism 60 switches to a state in which the distance in the second direction between the first support surface 62 and the second support surface 65 is wider than the distance between the first support surface 62 and the second support surface 65 in the first state.

[0044] The pusher 70 moves through the passage 40 from the third side to the fourth side in the axial direction (see "first to sixth stages" in Figures 9 and 10 and Figures 11 and 12). The pusher 70 supports, on its outer surface, the insulating paper 80 passing through the passage 40 from the sixth side in the first direction. The pusher 70 moves through the passage 40 from the fourth side to the third side in the axial direction (see "sixth to seventh stages" in Figure 10). When inserting the insulating paper 80 into the slot 93, the pusher 70 moves through the slot 93 from the third side to the fourth side in the axial direction while protruding from the nozzle mechanism 30 on the fourth side in the axial direction (see "fourth to sixth stages" in Figures 11 and 12).

[0045] The moving mechanism 76 moves the pusher 70 in the axial direction. The insulating paper insertion device 10 employs a linear motion mechanism as the moving mechanism 76. An example of a linear motion mechanism is a linear slider. The linear slider includes a linear motor and a linear encoder. Another example of a linear motion mechanism is a combination of a motor and a ball screw. An example of a motor is a servo motor. The servo motor may include an encoder. Another example of a linear motion mechanism is a cylinder. Examples of cylinders are air cylinders and electric cylinders. The linear motion mechanism as the moving mechanism 76 may include a guide mechanism. Examples of guide mechanisms include a linear guide and the following combinations: An example of this combination is a combination of a linear shaft and a linear bushing. The insulating paper insertion device 10 may employ a known linear motion mechanism as the moving mechanism 76. Therefore, further description of the moving mechanism 76 will be omitted.

[0046] The pusher 70 includes a contact piece 71 (see FIG. 4). The fourth axial end face of the contact piece 71 contacts the third axial end of the insulating paper 80. When the pusher 70 moves from the third axial end to the fourth axial end, the contact piece 71 pushes the insulating paper 80 toward the fourth axial end (see "First to Sixth Stages" in FIGS. 9 and 10 and FIGS. 11 and 12). The pusher 70 includes a first contact piece 72 and a second contact piece 73 as the contact pieces 71 (see FIG. 4). The first contact piece 72 is provided on a third side surface 74 (see FIG. 4(A)). The third side surface 74 forms a second circumferential side (an eighth side in the second direction) of the outer surface of the pusher 70. The second contact piece 73 is provided on a fourth side surface 75 of the outer surface of the pusher 70 (see FIG. 4(B)). The fourth side surface 75 forms a first side in the circumferential direction (seventh side in the second direction) of the outer surface of the pusher 70.

[0047] The insulating paper 80 is introduced into the first passage 41 of the passage 40 from the introduction port 43 in the following state (see "First to Third Stages" in FIG. 9). In this state, a region R0 of the pusher 70, which is on the fourth axial side of the contact piece 71, is inserted into the space S of the insulating paper 80 (see "Second Stage" in FIGS. 4 and 9). The first mechanism 50 supports the insulating paper 80 passing through the first passage 41 from the fifth side in the first direction on the inner surface of the first passage 41, and the pusher 70 supports the insulating paper 80 passing through the first passage 41 from the sixth side in the first direction on the outer surface of the pusher 70 (see FIGS. 11 and 12). The insulating paper 80 is supported by the outer surface of the pusher 70 on the fourth axial side of the contact piece 71 (see FIG. 4). The insulating paper 80 is maintained in a cylindrical shape.

[0048] The first mechanism 50 and the pusher 70 sandwich the insulating paper 80 between the inner surface of the first passage 41 and the outer surface of the pusher 70 (see "third stage" in FIG. 9 and FIG. 11). The first mechanism 50 and the pusher 70 may sandwich the first insulating region R1 of the insulating paper 80 between the inner surface of the first passage 41 and the third side surface 74 of the pusher 70, or may sandwich the second insulating region R2 of the insulating paper 80 between the inner surface of the first passage 41 and the fourth side surface 75 of the pusher 70.

[0049] The pusher 70 moves through the first passage 41 from the third side to the fourth side in the axial direction, moving the insulating paper 80 from the third side to the fourth side in the axial direction (see "Third to Fourth Stage" in Figure 9 and Figure 11). As a result, the insulating paper 80 passes through the first passage 41 from the third side to the fourth side in the axial direction. The position sensor measures the axial position of the pusher 70 as it moves in the axial direction. An example of the position sensor is a linear sensor. An example of the linear sensor is a linear encoder. The type and specifications of the position sensor are determined appropriately taking into consideration various conditions. A known position sensor can be used in the insulating paper insertion device 10. Therefore, further explanation of the position sensor will be omitted.

[0050] The second mechanism 60 is in the first state when the pusher 70 starts to move from the third side to the fourth side in the axial direction (see "First Stage to Third Stage" in FIG. 9 and "Third Stage" in FIG. 11). The second mechanism 60 switches to the second state when the pusher 70 moves from the third side to the fourth side in the axial direction along the passage 40 and reaches a set axial position (see "Fourth Stage" in FIGS. 9 and 11 to "Fifth Stage" in FIGS. 10 and 12). The arrival of the pusher 70 at the set position is determined from a measurement value measured by a position sensor. The set position is set in advance. The set position may be based on the following boundary position. The boundary position is an axial position that is a boundary between the first passage 41 and the second passage 42. Furthermore, the set position may be set according to the axial dimension of the cuff 81.

[0051] Assume that the insulating paper 80 is a "first insulating paper" and a "second insulating paper." The first insulating paper includes a first cuff as the cuff 81. The second insulating paper includes a second cuff as the cuff 81. The axial dimension of the first cuff is a first value, and the axial dimension of the second cuff is a second value. The first value and the second value have a relationship of "first value < second value." The set position for the second insulating paper may be set to a third side in the axial direction by the difference between the second value and the first value compared to the set position for the first insulating paper. Assume that the insulating paper 80 is the first insulating paper. In this case, the set position may be set to a third side in the axial direction by the first value from the boundary position. Assume that the insulating paper 80 is the second insulating paper. In this case, the set position may be set to a third side in the axial direction by the second value from the boundary position.

[0052] The axial position of the pusher 70 can be determined by the position of any part of the pusher 70. Examples of the any part of the pusher 70 include the fourth axial end of the pusher 70, the fourth axial end face of the contact piece 71, the third axial end face of the contact piece 71, and the third axial end of the pusher 70. In the pusher 70, the fourth axial end face of the contact piece 71 contacts the third axial end of the insulating paper 80, and the insulating paper 80 moves together with the pusher 70 from the third axial end to the fourth axial end. When the pusher 70 and the insulating paper 80 move from the third axial end to the fourth axial end, the axial position of the pusher 70 corresponds to the axial position of the cuff 81 of the insulating paper 80. The axial position of the pusher 70 corresponds to the moving distance of the cuff 81 of the insulating paper 80, which moves together with the pusher 70 from the third axial end to the fourth axial end.

[0053] As described above, in the insulating paper insertion device 10, the set position may be the third axial position from the boundary position. However, this set position is merely an example. The set position may also be the fourth axial position from the boundary position, or the boundary position may be the set position. The set position is appropriately set taking into consideration various conditions. Examples of such conditions include the gap dimension between the passage 40 and the region R0 of the pusher 70, the thickness of the cuff 81 in the first direction, and the relationship between this gap dimension and this thickness. Another example of such a condition is the axial dimension of the cuff 81.

[0054] Assume that the second mechanism 60 is in a first state. In this state, the second mechanism 60 supports the insulating paper 80 passing through the second passage 42 from the fifth side in the first direction on the inner surface of the second passage 42, and supports the insulating paper 80 passing through the second passage 42 from the sixth side in the first direction on the outer surface of the pusher 70 (see "Fourth Stage" in FIG. 11 ). The second mechanism 60 and the pusher 70 sandwich the insulating paper 80 between the inner surface of the second passage 42 and the outer surface of the pusher 70. The first support piece 61 supports the first insulating region R1 of the insulating paper 80 from the fifth side in the first direction. The second support piece 64 supports the second insulating region R2 of the insulating paper 80 from the fifth side in the first direction. The inner surface of the second passage 42 is formed by the inner surfaces of the first groove 63 and the second groove 66. The second mechanism 60 and the pusher 70 may be configured to sandwich the first insulating region R1 of the insulating paper 80 between the inner surface of the second passage 42 and the third side 74 of the pusher 70, or may be configured to sandwich the second insulating region R2 of the insulating paper 80 between the inner surface of the second passage 42 and the fourth side 75 of the pusher 70.

[0055] The pusher 70 moves through the second passage 42 from the third side to the fourth side in the axial direction, moving the insulating paper 80 from the third side to the fourth side in the axial direction (see "fourth stage to fifth stage" in Figures 11 and 12). Assume that the pusher 70 moves from the third side to the fourth side in the axial direction and reaches a set axial position. In this case, the second mechanism 60 switches from the first state to the second state (see "fourth stage to fifth stage" in Figures 9 to 12). Accordingly, in the nozzle mechanism 30, the second mechanism 60 releases support for the insulating paper 80 from the fifth side in the first direction and does not support the insulating paper 80 passing through the second passage 42 from the fifth side in the first direction (see "fifth stage to sixth stage" in Figures 10 and 12). The pusher 70 continues moving from the third side to the fourth side in the axial direction. The movement of the pusher 70 from the third side to the fourth side in the axial direction is carried out until it reaches an end position on the fourth side in the axial direction (see "sixth step" in FIGS. 10 and 12). The insulating paper 80 is inserted into the slot 93 with the cuff 81 in the next state (see "sixth step" in FIGS. 3 and 12). In this state, the cuff 81 contacts or approaches the opening edge of the slot 93 on the third side in the axial direction of the stator core 85.

[0056] After reaching the terminal position on the fourth side in the axial direction, the pusher 70 moves from the fourth side to the third side in the axial direction (see "sixth to seventh steps" in Figure 10). The movement of the pusher 70 from the fourth side to the third side in the axial direction is carried out up to the starting position on the third side in the axial direction. The pusher 70 moves back and forth in the axial direction between the starting position on the third side in the axial direction and the terminal position on the fourth side in the axial direction (see Figures 9 and 10). The insulating paper insertion device 10 alternately performs the first to seventh steps of the insertion process of the manufacturing method for the insulating structure 95 and the rotation operation of the stator core 85 by the support device 20, and inserts the insulating paper 80 into all of the slots 93.

[0057] Other than this, the insulating paper insertion device 10 is similar to known insulating paper insertion devices, and therefore, further description of the insulating paper insertion device 10 will be omitted.

[0058] <Effects of the embodiment> According to the embodiment, the following effects can be obtained.

[0059] (1) The insulating paper insertion device 10 includes a nozzle mechanism 30 and a pusher 70 (see FIG. 5). The nozzle mechanism 30 has a passage 40 therein (see FIGS. 6 to 8). The insulating paper 80 passes through the passage 40 (see FIGS. 9 to 12). The insulating paper 80 covers the wall surfaces of the slots 93 (see "Sixth Stage" in FIGS. 3 and 12). The wall surfaces of the slots 93 include first side surfaces 90 of the first teeth 89 and second side surfaces 92 of the second teeth 91 (see FIG. 2). The first side surfaces 90 form a first circumferential side of the first teeth 89. The second teeth 91 are adjacent to the first teeth 89 in the circumferential direction. The second side surfaces 92 form a second circumferential side of the second teeth 91. The pusher 70 moves the passage 40 from the third side to the fourth side in the axial direction while sandwiching the insulating paper 80 together with the inner surface of the passage 40, thereby moving the insulating paper 80 from the third side to the fourth side in the axial direction (see FIGS. 9 to 12). The nozzle mechanism 30 supports the insulating paper 80 passing through the passage 40 from the fifth side in the first direction on the inner surface of the passage 40, and the pusher 70 supports the insulating paper 80 passing through the passage 40 from the sixth side in the first direction on the outer surface of the pusher 70 (see FIGS. 11 and 12). The nozzle mechanism 30 includes a first mechanism 50 and a second mechanism 60 (see FIGS. 5 to 8). The first mechanism 50 has a first passage 41 of the passage 40 therein (see FIGS. 6 to 8). The first passage 41 has an inlet 43 for the insulating paper 80 at the third side end in the axial direction. The second mechanism 60 has a second passage 42 therein. The second passage 42 includes an outlet 44 for the insulating paper 80 at a fourth axial end and is connected to the fourth axial end of the first passage 41. The second mechanism 60 switches between a first state and a second state (first state: see "first state" in Figures 7 and 8 and Figures 9 and 11; second state: see "second state" in Figures 7 and 8 and Figures 10 and 12). In the first state, the second mechanism 60 supports the insulating paper 80 from the fifth side in the first direction, and in the second state, the second mechanism 60 does not support the insulating paper 80 from the fifth side in the first direction (see "fourth stage to fifth stage" in Figures 11 and 12).

[0060] The insulating paper insertion device 10 allows the outlet 44 to be narrowed relative to the slot 93. The insulating paper 80 can be inserted into the slot 93 from the outlet 44 while moving from the third side to the fourth side in the axial direction through the passage 40. The insulating paper 80 is pushed toward the same axial direction by the pusher 70, which moves from the third side to the fourth side in the axial direction. Consider an insulating paper insertion device of a comparative example. In the insulating paper insertion device of the comparative example, the outlet is narrowed relative to the slot 93. This outlet has the same shape as the outlet 44 in the first state. However, in the insulating paper insertion device of the comparative example, the passage portion including the outlet does not switch to the second state. This passage portion corresponds to the second passage 42 of the second mechanism 60. In the insulating paper insertion device of the comparative example, resistance that prevents the insulating paper 80 from passing through the outlet increases as the outlet is narrowed relative to the slot 93. This resistance increases at the cuff 81. In the insulating paper insertion device 10, by setting the second mechanism 60 to the second state, it is possible to prevent such resistance from occurring in the insulating paper 80 or to reduce such resistance occurring in the insulating paper 80. When the pusher 70, which moves from the third side to the fourth side in the axial direction, pushes the insulating paper 80 from the third side to the fourth side in the axial direction, it is possible to prevent clogging and / or buckling of the insulating paper 80 at or near the outlet 44. It is possible to smoothly insert the insulating paper 80 into the slot 93.

[0061] (2) The second mechanism 60 includes a first support piece 61 and a second support piece 64 (see FIGS. 6 to 8). The first support piece 61 supports the first insulating region R1 of the insulating paper 80 from the fifth side in the first direction (see "fourth stage" in FIG. 11). The second support piece 64 is provided adjacent to the first support piece 61 (see FIGS. 6 to 8). The second support piece 64 supports the second insulating region R2 of the insulating paper 80 from the fifth side in the first direction (see "fourth stage" in FIG. 11). In the insulating paper 80, the first insulating region R1 covers the first side surface 90 of the first tooth 89, and the second insulating region R2 covers the second side surface 92 of the second tooth 91 (see FIGS. 2 and 3). The first support piece 61 includes a first groove 63 in the first support surface 62 (see FIGS. 6 to 8). The first support surface 62 faces the second support piece 64. The second support piece 64 includes a second groove 66 in the second support surface 65. The second support surface 65 faces the first support surface 62. The first groove 63 and the second groove 66 form the second passage 42. The second mechanism 60 opens and closes the first support piece 61 and the second support piece 64 in a second direction. The second direction is perpendicular to the axial direction. The first support surface 62 and the second support surface 65 move closer to and farther apart in the second direction. When the second mechanism 60 is in the second state, the distance between the first support surface 62 and the second support surface 65 is switched to a state in which it is wider than the distance between the first support surface 62 and the second support surface 65 in the first state.

[0062] With this configuration, the first support piece 61 can support the first insulating region R1 of the insulating paper 80 from the fifth side in the first direction, and the second support piece 64 can support the second insulating region R2 of the insulating paper 80 from the fifth side in the first direction. The second mechanism 60 can be switched between a first state and a second state by opening and closing the first support piece 61 and the second support piece 64. The second mechanism 60 can be set to the first state by closing the first support piece 61 and the second support piece 64. The second mechanism 60 can be set to the second state by opening the first support piece 61 and the second support piece 64.

[0063] (3) The second mechanism 60 opens and closes the first support piece 61 and the second support piece 64 in a second direction. The second direction is perpendicular to the imaginary line L. The imaginary line L coincides with the radial direction and passes through the circumferential center of the slot 93 (see FIGS. 1 and 2).

[0064] With this configuration, the second direction can correspond to the circumferential direction, and the first support piece 61 and the second support piece 64 can be opened and closed in the second direction corresponding to the circumferential direction.

[0065] (4) The first mechanism 50 includes a first oscillation shaft 51 and a second oscillation shaft 52 (see FIGS. 6 to 8). The first oscillation shaft 51 serves as the center of oscillation of the first support piece 61, which opens and closes the first support piece 61 and the second support piece 64 in the second direction, and the second oscillation shaft 52 serves as the center of oscillation of the second support piece 64, which opens and closes the first support piece 61 and the second support piece 64 in the second direction (see FIG. 8). The first support piece 61 is supported by the first oscillation shaft 51, and the second support piece 64 is supported by the second oscillation shaft 52 (see FIGS. 6 to 8).

[0066] According to this configuration, the first support piece 61 can be swung around the first swing shaft 51, and the second support piece 64 can be swung around the second swing shaft 52. The swinging of the first support piece 61 and the swinging of the second support piece 64 can open and close the first support piece 61 and the second support piece 64.

[0067] (5) The method for manufacturing the insulating structure 95 is performed using the insulating paper insertion device 10 (see FIG. 5 and FIGS. 9 to 12). The method for manufacturing the insulating structure 95 includes an insertion step. In the insertion step, the insulating paper 80 is inserted into the slot 93 by the insulating paper insertion device 10. In the insertion step, the second mechanism 60 is in the first state when the pusher 70 starts to move from the third side to the fourth side in the axial direction, and switches to the second state when the pusher 70 moves from the third side to the fourth side in the axial direction and reaches a set axial position.

[0068] According to the manufacturing method of the insulating structure 95, the insulating paper insertion device 10 can perform the above-mentioned functions while inserting the insulating paper 80 into the slot 93. The insulating paper 80 can be smoothly inserted into the slot 93.

[0069] <Modification> The embodiment can also be as follows. Some of the configurations of the modified examples shown below can also be adopted in appropriate combination. Below, we will explain the differences from the above, and will omit explanations of similarities as appropriate.

[0070] (1) The insulating paper insertion device 10 processes a stator core 85 of an internal rotor type rotating machine, and inserts insulating paper 80 into slots 93 of this stator core 85 (see Figures 1 to 5). The structure of the insulating paper insertion device 10 can also be used in the following insulating paper insertion device. This insulating paper insertion device inserts insulating paper into slots in the stator core of an external rotor type rotating machine. In the stator core of an external rotor type rotating machine, multiple teeth protrude radially outward from the yoke.

[0071] (2) The second mechanism 60 opens and closes the first support piece 61 and the second support piece 64 in a second direction (see FIGS. 7 and 8). The second direction is perpendicular to the axial direction and perpendicular to the next imaginary line L. This imaginary line L coincides with the radial direction and passes through the circumferential center of the slot 93 (see FIGS. 1 and 2). The second direction may be a direction that intersects with the imaginary line L, or may be a direction that coincides with the imaginary line L. The first oscillation axis and the second oscillation axis may be provided along a direction perpendicular to the second direction, as described above.

[0072] (3) The insulating paper insertion device 10 includes a moving mechanism 76 and a position sensor. The moving mechanism 76 moves the pusher 70 in the axial direction. The position sensor measures the axial position of the pusher 70 as it moves axially. The axial position of the pusher 70 corresponds to the amount of movement of a moving body of the moving mechanism 76. In the moving mechanism 76, the moving body moves in the axial direction. The position sensor may measure the amount of movement of the moving body of the moving mechanism 76. Assume that the moving mechanism 76 is a linear slider. In this case, the mover of the linear motor corresponds to the moving body of the moving mechanism 76. Assume that the moving mechanism 76 is a combination of a motor and a ball screw. In this case, the nut of the ball screw corresponds to the moving body of the moving mechanism 76. Assume that the moving mechanism 76 is a cylinder. In this case, the rod of the cylinder corresponds to the moving body of the moving mechanism 76. The axial position of the pusher 70 moves by the same amount as the amount of movement of the moving body of the moving mechanism 76. The axial position of the pusher 70 can be determined by the amount of movement of this moving body measured by the position sensor. That is, when the pusher 70 and the insulating paper 80 move from the third side to the fourth side in the axial direction, the axial position of the pusher 70 corresponds to the amount of movement of the moving body of the moving mechanism 76. The amount of movement of the moving body of the moving mechanism 76 corresponds to the movement distance of the cuff 81 of the insulating paper 80, which moves together with the pusher 70 from the third side to the fourth side in the axial direction. [Explanation of symbols]

[0073] 10 insulating paper inserting device, 20 support device, 30 nozzle mechanism, 40 passage 41 First passage, 42 Second passage, 43 Inlet, 44 Outlet 50 first mechanism, 51 first swing axis, 52 second swing axis, 60 second mechanism 61 first support piece, 62 first support surface, 63 first groove, 64 second support piece 65 second support surface, 66 second groove, 70 pusher, 71 contact piece 72 first contact piece, 73 second contact piece, 74 third side, 75 fourth side 76 moving mechanism, 80 insulating paper, 81 cuff, 85 stator core 86 yoke, 87 peripheral surface, 88 teeth, 89 first teeth 90 first side, 91 second teeth, 92 second side, 93 slot 94 Slot opening, 95 Insulation structure, C Center line, L Imaginary line R0 area, R1 first insulating area, R2 second insulating area, R3 third insulating area S space

Claims

1. a nozzle mechanism provided in a slot of the stator core, the slot having as its wall surface a first side surface on a first side in a circumferential direction of a first tooth of a stator core of a stator of the rotating machine, the first side surface being on a first side in a circumferential direction centered on a rotation axis of a rotor of the rotating machine, and a second side surface on a second side in the circumferential direction of a second tooth of the stator core, the second tooth being circumferentially adjacent to the first tooth on the first side in the circumferential direction of the first tooth, the nozzle mechanism having an internal passage through which insulating paper passes that covers a wall surface of the slot including the first side surface and the second side surface; a pusher that moves the passage from a third side to a fourth side in the axial direction of the rotary shaft while sandwiching the insulating paper together with the inner surface of the passage, and moves the insulating paper from the third side to the fourth side in the axial direction, the nozzle mechanism supports the insulating paper passing through the passage from a fifth side on which a wall surface of the slot is located relative to the insulating paper in a first direction in which the insulating paper and a wall surface of the slot are adjacent to each other, the fifth side being perpendicular to the axial direction, on the inner surface of the passage; the pusher supports, on an outer surface of the pusher, the insulating paper passing through the passage from a sixth side in the first direction; The nozzle mechanism includes: a first mechanism having a first passage therein, the first passage including an inlet for the insulating paper at a third side end in the axial direction; a second mechanism having a second passage therein, the second passage including an outlet for the insulating paper at a fourth axial end and connected to the fourth axial end of the first passage; The second mechanism is an insulating paper insertion device that switches between a first state in which the insulating paper is supported from a fifth side in the first direction and a second state in which the insulating paper is not supported from the fifth side in the first direction.

2. The second mechanism is a first support piece corresponding to support from a fifth side in the first direction of the first insulating region of the insulating paper covering the first side surface; a second support piece that is provided adjacent to the first support piece and corresponds to support from a fifth side in the first direction of the second insulating region of the insulating paper that covers the second side surface, the first support piece includes a first groove on a first support surface facing the second support piece; the second support piece includes a second groove on a second support surface facing the first support surface; the first groove and the second groove form the second passage; The second mechanism is opening and closing the first support piece and the second support piece in a second direction perpendicular to the axial direction and in which the first support surface and the second support surface approach and move away from each other; 2. The insulating paper insertion device according to claim 1, wherein, in the second state, the distance between the first support surface and the second support surface is switched to a state in which the distance between the first support surface and the second support surface is wider than the distance between the first support surface and the second support surface in the first state.

3. 3. The insulating paper insertion device according to claim 2, wherein the second mechanism opens and closes the first support piece and the second support piece in the second direction that coincides with the radial direction centered on the rotation axis and is perpendicular to an imaginary line passing through the circumferential center of the slot.

4. The first mechanism is a first swing shaft that serves as a swing center of the first support piece that opens and closes the first support piece and the second support piece in the second direction; a second swing shaft that serves as a center of swing of the second support piece that opens and closes the first support piece and the second support piece in the second direction, the first support piece is supported by the first swing shaft, The insulating paper insertion device according to claim 3 , wherein the second support piece is supported by the second pivot shaft.

5. A method for manufacturing the insulating structure, which is carried out by the insulating paper insertion device according to any one of claims 1 to 4, comprising: an inserting step of inserting the insulating paper into the slot; In the insertion process, the second mechanism is in the first state when the pusher starts to move from the third side to the fourth side in the axial direction, and switches from the first state to the second state when the pusher moves from the third side to the fourth side in the axial direction and reaches a set position in the axial direction.

Images