Device and method for manufacturing winding connection part cover

Abstract

The invention discloses a manufacturing device and a manufacturing method of a winding connection part cover, which can efficiently manufacture the winding connection part cover. An end portion of an insulating film (120) having a predetermined shape on one side in the longitudinal direction is inserted into a first groove (231 (1)) of a first winding shaft (230 (1)) and a second groove (231 (2)) of a second winding shaft (230 (2)). In this state, the first winding shaft and the second winding shaft are rotated to form a cylindrical member (130) having an inner space (131) with openings at both ends. The inner space (131) is divided into a first inner space portion (131 (1)) and a second inner space (131 (2)) by forming a joining portion at a predetermined location of the cylindrical member (130). Next, a first neutral point cover (130 (1)) and a second neutral point cover (130 (2)) are formed by cutting the predetermined portion of the joint.

Description

Technical Field

[0001] The present invention relates to a winding connection portion cover manufacturing device and a winding connection portion cover manufacturing method for manufacturing a winding connection portion cover covering a connection portion of a stator winding. Background Art

[0002] The electric motor used in electrical equipment such as air conditioners (household air conditioners, car air conditioners, etc.) and refrigerators has a winding connection portion to which multiple stator windings are connected. For example, when the three-phase stator windings are connected in a star shape, a neutral point is formed where the ends of one side of the stator windings of each phase are connected together. The ends of the other side of the stator windings of each phase are connected to the power supply terminals of the three phases respectively. In addition, the description of "neutral point" means "the portion where the ends of one side of the three-phase stator windings are gathered together and connected together."

[0003] The neutral point is arranged in contact with or close to other electrical components (eg, other parts of the stator winding, the stator core, an electrical device, etc.), and therefore the neutral point needs to be insulated from the other electrical components.

[0004] In the past, a neutral point cover covering the neutral point was used to insulate the neutral point from other electrical components. For example, Japanese Patent Publication No. 2016-25796 discloses a neutral point cover formed of an insulating film. The neutral point cover is formed in a cylindrical shape with an inner space closed at one end.

[0005] Japanese Patent Application Laid-Open No. 2016-25796 discloses a method for manufacturing a neutral point cover in which an insulating film is wound to form a cylindrical member, and then one end side of the cylindrical member is joined to manufacture the neutral point cover.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2016-25796 Summary of the invention

[0009] Problem that the invention aims to solve

[0010] In the method for manufacturing a neutral point cover disclosed in Japanese Patent Application Laid-Open No. 2016-25796, the neutral point cover cannot be manufactured efficiently.

[0011] An object of the present invention is to provide a winding connection portion cover manufacturing device and a winding connection portion cover manufacturing method capable of efficiently manufacturing a winding connection portion cover that covers a winding connection portion to which a plurality of stator windings are connected, such as a neutral point.

[0012] Solutions for solving problems

[0013] A first invention relates to a device for manufacturing a winding connection portion cover.

[0014] The first invention is composed of a winding device, a joining device, and a cutting device.

[0015] The winding device includes a winding shaft rotatable about an axis extending in a first direction. The winding device winds an insulating film of a predetermined shape around the winding shaft to form a cylindrical member having an inner space with both ends opened.

[0016] The joining device forms a joining portion at a predetermined position of the cylindrical member to divide the inner space into a first inner space and a second inner space.

[0017] The cutting device cuts a predetermined portion of the joint formed in the tubular member, thereby dividing the tubular member into a first tubular member having a first inner space and a second tubular member having a second inner space.

[0018] The first cylindrical member (second cylindrical member) functions as a winding connection portion cover that covers the winding connection portion by inserting the winding connection portion into the first inner space (second inner space).

[0019] In the first invention, the winding connection portion cover can be manufactured efficiently.

[0020] In a different aspect of the first invention, the winding shaft includes a first winding shaft and a second winding shaft.

[0021] The first winding shaft can rotate around a first axis extending in the first direction. The second winding shaft can rotate around a second axis extending in the first direction. In addition, the first winding shaft and the second winding shaft are arranged in a manner that a first top end portion of the first winding shaft and a second top end portion of the second winding shaft are opposite to each other along the first direction. That is, the first winding shaft and the second winding shaft are arranged separately along the first direction.

[0022] The winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft.

[0023] In this aspect, the work of forming the joined portion and the work of cutting the joined portion can be performed in a state where the insulating film is wound around the first winding shaft and the second winding shaft.

[0024] In a different aspect of the first invention, the first winding shaft and the second winding shaft are configured to be movable along the first direction.

[0025] In this aspect, the cylindrical member can be moved from the position where the winding device is arranged.

[0026] In a different aspect of the first invention, the insulating film extends in a width direction and a length direction that intersect each other.

[0027] The winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft in a state where a portion of the insulating film on one end side along the longitudinal direction is locked to the first winding shaft and the second winding shaft.

[0028] In this aspect, the insulating film can be reliably wound around the first winding shaft and the second winding shaft.

[0029] In a different embodiment of the first invention, the first winding shaft has a first groove, and the second winding shaft has a second groove. The first groove extends along the first direction and has an opening portion opened on the outer peripheral surface of the first winding shaft including the first top end portion. The second groove extends along the first direction and has an opening portion opened on the outer peripheral surface of the second winding shaft including the second top end portion.

[0030] The winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft with one end portion of the insulating film along the longitudinal direction inserted into the first groove of the first winding shaft and the second groove of the second winding shaft.

[0031] In this aspect, the insulating film can be easily and reliably wound around the first winding shaft and the second winding shaft.

[0032] In a different aspect of the first invention, the winding device includes a guide jig that guides a portion of the insulating film on one end side along the longitudinal direction to the first groove of the first winding shaft and the second groove of the second winding shaft.

[0033] In this aspect, the portion of the insulating film on the one end side along the longitudinal direction can be easily inserted into the first groove and the second groove.

[0034] In a different aspect of the first invention, the guide jig includes a first guide jig and a second guide jig.

[0035] The first guide jig has a first guide groove extending in a first direction and a second direction intersecting the first direction. The first guide groove has a first opening and a second opening on a first side and a second side along the second direction, respectively.

[0036] The second guide jig has a second guide groove extending in the first direction and the second direction. The second guide groove has a third opening and a fourth opening on the first side and the second side along the second direction, respectively.

[0037] The winding device is configured to insert a portion of the insulating film on one end side along the longitudinal direction into the first groove of the first winding shaft via the first guide groove of the first guide jig, and into the second groove of the second winding shaft via the second guide groove of the second guide jig.

[0038] In this aspect, the portion of the insulating film on the one end side along the longitudinal direction can be easily inserted into the first groove and the second groove.

[0039] In a different aspect of the first invention, the first winding shaft and the first guide jig are configured to be movable in the first direction in a linked manner, and the second winding shaft and the second guide jig are configured to be movable in the first direction in a linked manner.

[0040] In this aspect, the cylindrical member can be moved from the position where the winding device is arranged.

[0041] In a different aspect of the first invention, the first guide groove has a first guide groove portion, and the second guide groove has a second guide groove portion.

[0042] The first guide groove portion and the second guide groove portion are formed such that a distance therebetween along a third direction intersecting the first direction and the second direction decreases from the first side toward the second side along the second direction.

[0043] In addition, this aspect includes an aspect of the first guide groove having only the first guide groove portion and the second guide groove having only the second guide groove portion.

[0044] In this aspect, the portion of the insulating film on the one end side along the longitudinal direction can be easily inserted into the first groove and the second groove.

[0045] In a different aspect of the first invention, the first guide groove further includes a third guide groove portion, and the second guide groove further includes a fourth guide groove portion.

[0046] The third guide groove portions are arranged on the second side of the first guide groove portions along the second direction, and the intervals therebetween along the third direction are equal (including "substantially equal").

[0047] The fourth guide groove portions are arranged on the second side of the second guide groove portions along the second direction, and the fourth guide groove portions are arranged at equal intervals (including "substantially equal") along the third direction.

[0048] In this aspect, the portion of the insulating film on the one end side along the longitudinal direction can be easily and reliably inserted into the first groove and the second groove.

[0049] In a different aspect of the first invention, the first guide jig and the second guide jig respectively have a first guide jig inner space and a second guide jig inner space extending along the first direction.

[0050] The first guide jig inner space has an inner diameter larger than the outer diameter of the first winding shaft and communicates with the second opening of the first guide groove.

[0051] The second guide jig inner space has an inner diameter larger than the outer diameter of the second winding shaft, and communicates with the fourth opening of the second guide groove.

[0052] The first winding shaft is inserted into the first guide jig inner space so as to be rotatable relative to the first guide jig.

[0053] The second winding shaft is inserted into the second guide jig inner space so as to be rotatable relative to the second guide jig.

[0054] In this aspect, the insulating film can be easily and reliably wound around the first winding axis and the second winding axis.

[0055] In a different embodiment of the first invention, the winding device is configured to adjust the rotational position of the first winding shaft and the rotational position of the second winding shaft when inserting the portion of the insulating film on the one end side along the length direction into the first groove of the first winding shaft and the second groove of the second winding shaft. Specifically, the winding device is configured to adjust the rotational position of the first winding shaft so that the opening of the first groove is opposite to the second opening of the first guide groove, and adjust the rotational position of the second winding shaft so that the opening of the second groove is opposite to the fourth opening of the second guide groove.

[0056] In this aspect, the portion of the insulating film on the one end side along the longitudinal direction can be reliably inserted into the first groove and the second groove.

[0057] In a different embodiment of the first invention, the outer peripheral surface of the first top end portion of the first winding shaft is formed so that the outer diameter decreases as it goes from the second side toward the first side along the first direction, and the outer peripheral surface of the second top end portion of the second winding shaft is formed so that the outer diameter decreases as it goes from the first side toward the second side along the first direction.

[0058] In this aspect, the first distal end portion of the first winding shaft and the second distal end portion of the second winding shaft can be easily pulled out from the inner space of the cylindrical member.

[0059] In a different aspect of the first invention, a holding device for holding the cylindrical member having the joining portion formed therein is provided.

[0060] In this aspect, the cylindrical member in which the joining portion is formed can be moved.

[0061] In a different aspect of the first invention, the holding device includes a first holding portion and a second holding portion. The first holding portion includes a first holding member and a second holding member, and the first holding member and the second holding member sandwich a portion of the cylindrical member that is closer to the joint portion in the extending direction.

[0062] The second holding portion includes a third holding member and a fourth holding member, and the third holding member and the fourth holding member sandwich a portion of the cylindrical member on the other side of the joining portion along the extending direction.

[0063] In this aspect, the predetermined portion of the joint can be cut while the cylindrical member is held.

[0064] In a different aspect of the first invention, there is provided a storage device including a storage portion that stores the first cylindrical member and the second cylindrical member.

[0065] In this aspect, the first cylindrical member and the second cylindrical member can be accommodated.

[0066] In a different aspect of the first invention, the storage device includes a first storage section, a second storage section, and a distributing member. The distributing member is configured to distribute the first cylindrical member and the second cylindrical member to the first storage section and the second storage section, respectively.

[0067] In this aspect, the first cylindrical member and the second cylindrical member can be separated and stored.

[0068] In the different modes of the first invention, the cutting device has a blade portion formed with a blade extending in a straight line. And, when observed in a cross section perpendicular to the extension direction of the tubular member (including "substantially perpendicular"), the angle formed by the extension line of the blade and the extension line of the joint is an acute angle.

[0069] In this aspect, it is possible to prevent the occurrence of cutting defects, cutting burrs, and the like.

[0070] The second invention relates to a method for manufacturing a winding connection portion cover.

[0071] The second invention includes first to third steps.

[0072] In the first step, an insulating film having a predetermined shape is wound around a winding shaft rotatable about an axis extending in a first direction, thereby forming a cylindrical member having an inner space opened at both ends.

[0073] In the second step, a joint portion is formed at a predetermined position of the cylindrical member to divide the inner space into a first inner space and a second inner space.

[0074] In the third step, a predetermined portion of the joint formed in the tubular member is cut to divide the tubular member into a first tubular member having a first inner space and a second tubular member having a second inner space.

[0075] In the second invention, the winding connection portion cover can be manufactured efficiently.

[0076] In a different embodiment of the second invention, in the first step, the insulating film is wound around a first winding axis and a second winding axis, the first winding axis being capable of rotating about a first axis extending in the first direction, and the second winding axis being capable of rotating about a second axis extending in the first direction and being arranged separately from the first winding axis along the first direction.

[0077] In this aspect, the work of forming the joined portion and the work of cutting the joined portion can be performed in a state where the insulating film is wound around the first winding shaft and the second winding shaft.

[0078] Effects of the Invention

[0079] By using the winding connection portion cover manufacturing apparatus and the winding connection portion cover manufacturing method of the present invention, the winding connection portion cover can be efficiently manufactured. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 It is a block diagram showing a schematic configuration of a manufacturing apparatus for a neutral point cover.

[0081] Figure 2 1 is a flowchart showing an outline of a method for manufacturing a neutral point cover.

[0082] Figure 3A This is a flowchart showing an example of a method for supplying an insulating film having a predetermined shape.

[0083] Figure 3B This is a flowchart showing another example of the method for supplying an insulating film having a predetermined shape.

[0084] Figure 4A It is a diagram for explaining the schematic operation of the insulating film supply device.

[0085] Figure 4B It is a diagram for explaining the schematic operation of the winding device.

[0086] Figure 5A It is a diagram for explaining the schematic operation of the bonding device.

[0087] Figure 5B It is a diagram for explaining the schematic operation of the holding device.

[0088] Fig. 6A This is a diagram for explaining the schematic operation of the cutting device.

[0089] Figure 6B It is a diagram for explaining the schematic operation of the storage device.

[0090] Figure 7 It is a figure which shows the winding device which comprises the manufacturing apparatus of the neutral point cover of 1st Embodiment.

[0091] Figure 8 It means composition Figure 7 FIG. 1 is a diagram showing an assembled state of a winding shaft and a guide jig of a winding device.

[0092] Fig. 9 Observed from the direction of arrow IX Figure 8 The obtained figure.

[0093] Fig.10 It is a diagram for explaining the operation of the winding device constituting the manufacturing device of the neutral point cover according to the first embodiment.

[0094] Fig.11 It is a diagram showing a joining device constituting the manufacturing device of the neutral point cover according to the first embodiment.

[0095] Fig.12 It is a diagram showing a holding device constituting the manufacturing device of the neutral point cover according to the first embodiment.

[0096] Fig.13A It is a figure which shows the cutting device which comprises the manufacturing apparatus of the neutral point cover of 1st Embodiment.

[0097] Fig. 13B Observed from the direction of arrow XIII Fig.13A Obtained cross-sectional view.

[0098] Fig.14 It is a figure which shows the storage device which comprises the manufacturing apparatus of the neutral point cover of 1st Embodiment.

[0099] Fig.15 It is a figure which shows the winding device which comprises the manufacturing apparatus of the neutral point cover of 2nd Embodiment.

[0100] Fig.16 It means composition Fig.15 FIG. 1 is a diagram showing an assembled state of a winding shaft and a guide jig of a winding device.

[0101] Fig.17 Observed from the direction of arrow XVII Fig.16 The obtained figure.

[0102] Fig.18 It is a diagram for explaining the operation of the winding device constituting the manufacturing device of the neutral point cover according to the second embodiment.

[0103] Fig.19A It is a figure which shows the cutting device which comprises the manufacturing apparatus of the neutral point cover of 2nd Embodiment.

[0104] Fig.19B Observe from the direction of arrow XIX-XIX Fig.19A Obtained cross-sectional view.

[0105] Fig. 20It is a figure which shows the storage device which comprises the manufacturing apparatus of the neutral point cover of 2nd Embodiment.

[0106] Description of Reference Numerals

[0107] 10. A manufacturing device for a neutral point cover (a manufacturing device for a winding connection portion);

[0108] 100. Insulating film supply device;

[0109] 110. Long strip of insulating film;

[0110] 120. An insulating film of a predetermined shape;

[0111] 120a, 120b, 120c, 120d, edge;

[0112] 130, 130(1), 130(2), cylindrical member;

[0113] 131. Inner space;

[0114] 131a, 131b, opening;

[0115] 131(1), 131(2), medial space;

[0116] 140, 140(1), 140(2), second joint;

[0117] 141, 142, joint surface;

[0118] 200, winding device;

[0119] 210(1), 210(2), 230(1), 230(2), 250(1), 250(2), winding shaft;

[0120] 211(1), 211(2), 231(1), 231(2), 251(1), 251(2), slot;

[0121] 212(1), 212(2), 232(1), 232(2), 252(1), 252(2), top part;

[0122] 240(1), 240(2), 260(1), 260(2), guide fixture;

[0123] 241(1), 241(2), 261(1), 261(2), inner circumference;

[0124] 242(1), 242(2), 262(1), 262(2), guide the inner space of the fixture;

[0125] 243(1), 243(2), 244(1), 244(2), 263(1), 263(2), 264(1), 264(2), wall;

[0126] 243a(1), 243a(2), 243b(1), 243b(2), 244a(1), 244a(2), 244b(1), 244b(2), wall portion;

[0127] 245(1), 245(2), 265(1), 265(2), guide groove;

[0128] 245a(1), 245a(2), 245b(1), 245b(2), guide groove portion;

[0129] 245(1)A, 245(1)B, 245(2)A, 245(2)B, 265(1)A, 265(1)B, 265(2)A, 265(2)B, opening;

[0130] 300, joining device;

[0131] 310(1), 320(1), vibrators for welding;

[0132] 310(2), 320(2), receiving platform;

[0133] 400, holding device;

[0134] 410(1), 410(2), 440(1), 440(2), 470(1), 470(2), retaining portion;

[0135] 420(1), 420(2), 430(1), 430(2), 450(1), 450(2), 460(1), 460(2), 480(1), 480(2), 490(1), 490(2), retaining member;

[0136] 451(1), 451(2), 461(1), 461(2), 481(1), 481(2), 491(1), 491(2), end face;

[0137] 462(1), 462(2), notched surface;

[0138] 463(1), 463(2), concave part;

[0139] 500. Cutting device;

[0140] 510, 520, 540, blade;

[0141] 511, 521, 541, blade;

[0142] 530, loading platform;

[0143] 531, end face;

[0144] 532, notched surface;

[0145] 533. concave part;

[0146] 534, hole;

[0147] 600, storage device;

[0148] 610, 620(1), 620(2), 640, storage unit;

[0149] 630, allocation component;

[0150] 700. Control device. DETAILED DESCRIPTION

[0151] Hereinafter, embodiments of a winding connection portion cover manufacturing apparatus and a winding connection portion cover manufacturing method according to the present invention will be described with reference to the drawings.

[0152] Hereinafter, a manufacturing apparatus and a manufacturing method of a neutral point cover for manufacturing a neutral point cover covering a neutral point formed by connecting one end portion of three-phase stator windings of a motor together will be described.

[0153] The X direction shown in the figure corresponds to the “first direction” of the present invention, the arrow X1 side corresponds to the “first side along the first direction” of the present invention, and the arrow X2 side corresponds to the “second side along the first direction” of the present invention.

[0154] The Y direction that is orthogonal to the X direction (including "substantially orthogonal") corresponds to the "second direction intersecting the first direction" of the present invention, the arrow Y1 side corresponds to the "first side along the second direction" of the present invention, and the arrow Y2 side corresponds to the "second side along the second direction" of the present invention.

[0155] The Z direction which is orthogonal to the X direction and the Y direction (including "substantially orthogonal") corresponds to the "third direction intersecting the first direction and the second direction" of the present invention, the arrow Z1 side corresponds to the "first side along the third direction" of the present invention, and the arrow Z2 side corresponds to the "second side along the third direction" of the present invention.

[0156] Hereinafter, a case will be described in which the X direction and the Y direction extend in the horizontal direction and the Z direction extends in the vertical direction.

[0157] Figure 1 1 is a block diagram showing a schematic configuration of a manufacturing apparatus 10 for a neutral point cover.

[0158] The manufacturing device 10 of the neutral point cover includes an insulating film supply device 100, a winding device 200, a bonding device 300, a holding device 400, a cutting device 500, a storage device 600, and a control device 700. The winding device 200, the bonding device 300, the cutting device 500, and the storage device 600 are respectively arranged at different positions along the first direction (X direction).

[0159] The insulating film supply device 100 supplies the insulating film to the winding device 200 .

[0160] The winding device 200 winds up the insulating film to form a cylindrical member having an inner space with both ends opened.

[0161] The joining device 300 joins predetermined portions of the cylindrical member to divide the inner space into a first inner space and a second inner space.

[0162] The holding device 400 holds the cylindrical member. The holding device 400 includes a holding portion that holds the cylindrical member and a moving device that moves the holding portion in the second direction.

[0163] The cutting device 500 cuts a predetermined portion of the joint portion of the tubular member to separate the tubular member into the first tubular member having the first inner space and the second tubular member having the second inner space.

[0164] The storage device 600 stores the first cylindrical member and the second cylindrical member in the storage portion.

[0165] The operation of each device is controlled by the control device 700. As the control device 700, a known control device including a processing device, a storage device, an input device, an output device, a display device, and the like is used.

[0166] The winding device 200 , the joining device 300 , the cutting device 500 , and the storage device 600 are arranged at a first position, a second position, and a third position along the second direction (Y direction).

[0167] Reference Figure 2 6 to 6 illustrate an outline of a method for manufacturing a neutral point cover.

[0168] Figure 2 is a flow chart illustrating a method for manufacturing a neutral point cover, Figure 3A , Figure 3B is a flowchart illustrating an embodiment of an insulating film supply method. Figure 4A It is a diagram for explaining the schematic operation of the insulating film supplying device 100 . Figure 4B It is a diagram for explaining the schematic operation of the winding device 200. Figure 5A It is a diagram for explaining the schematic operation of the bonding apparatus 300 . Figure 5BIt is a diagram for explaining the schematic operation of the holding device 400. Fig. 6A It is a diagram for explaining the schematic operation of the cutting device 500. Figure 6B This is a diagram showing a schematic structure of the storage device 600.

[0169] In step A1 , an insulating film having a predetermined shape is wound by a winding device 200 to form a cylindrical member 130 having an inner space 131 with both ends opened.

[0170] Figure 4A The winding device 200 is shown including a first winding shaft 210 ( 1 ) and a second winding shaft 210 ( 2 ).

[0171] The first winding shaft 210 (1) is configured to be rotatable about a first axis P extending in a first direction (X direction) and to be movable in the direction in which the first axis P extends. The first winding shaft 210 (1) has a first groove 211 (1) and a first tip portion 212 (1). The first groove 211 (1) opens on the outer peripheral surface of the first winding shaft 210 (1) including the first tip portion 212 (1).

[0172] The second winding shaft 210 (2) is configured to be rotatable about a second axis Q extending along the first direction (X direction) and to be movable along the extension direction of the second axis Q. In addition, the second winding shaft 210 (2) has a second groove 211 (2) and a second top end portion 212 (2). The second groove 211 (2) opens on the outer peripheral surface of the second winding shaft 210 (2) including the second top end portion 212 (2).

[0173] The first winding axis 210 ( 1 ) and the second winding axis 210 ( 2 ) are arranged to be spaced apart from each other along the first direction.

[0174] When forming the cylindrical member, the first winding shaft 210 ( 1 ) and the second winding shaft 210 ( 2 ) are arranged at winding positions where the interval between the first distal end portion 212 ( 1 ) and the second distal end portion 212 ( 2 ) is short.

[0175] In this state, the insulating film 120 having a predetermined shape is supplied from the insulating film supply device 100 to the winding device 200 .

[0176] As the insulating film, a known insulating film, for example, a polyester film or the like can be used.

[0177] exist Figure 4AIn the insulating film 120 of a predetermined shape (hereinafter referred to as "insulating film 120"), the width along the width direction (F direction) is Mmm, and the length along the length direction (G direction) orthogonal (including "substantially orthogonal") to the width direction is Nmm, and the insulating film 120 of the predetermined shape is formed into a rectangular shape having edge portions 120a~120d.

[0178] In the insulating film 120 , a portion on one end side (edge ​​120 a side) along the longitudinal direction is locked to the first winding axis 210 ( 1 ) and the second winding axis 210 ( 2 ).

[0179] exist Figure 4B In the embodiment, the portion of the insulating film 120 on the edge 120a side is inserted into the first groove 211(1) of the first winding shaft 210(1) and the second groove 211(2) of the second winding shaft 210(2).

[0180] Then, in this state, the first winding shaft 210 ( 1 ) and the second winding shaft 210 ( 2 ) are rotated in the same direction.

[0181] Thus, the cylindrical member 130 having the inner space 131 opened at both ends (openings 131 a and 131 b ) is formed.

[0182] As a method of supplying the insulating film 120 to the winding device 200 , various methods can be used.

[0183] Reference Figure 3A The flowchart shown explains an example of a method of supplying the insulating film 120 .

[0184] In step B1, a portion of the insulating film strip along one end side in the longitudinal direction is locked to the first winding shaft 210 (1) and the second winding shaft 210 (2). For example, a portion of the insulating film strip 110 (hereinafter referred to as "insulating film 110") along one end side in the longitudinal direction (edge ​​110a side) of the insulating film strip having a width Mmm wound into a roll shape is inserted into the first groove 211 (1) of the first winding shaft 210 (1) and the second groove 211 (2) of the second winding shaft 210 (2).

[0185] In step B2 , the insulating film 110 is cut at a portion which is a predetermined length N mm away from the edge portion 110 a .

[0186] Reference Figure 3B The flowchart shown in the figure explains another example of the method of supplying the insulating film 120 .

[0187] In step C1 , the insulating film 110 having a width of Mmm is cut at a portion which is a predetermined length Nmm away from one end (edge ​​portion 110 a ) along the longitudinal direction.

[0188] In step C2, a portion of the insulating film 120 cut to a set length along one end side (edge ​​120a side) in the longitudinal direction is inserted into the first groove 211 (1) of the first winding shaft 210 (1) and the second groove 211 (2) of the second winding shaft 210 (2).

[0189] Next, in step A2, predetermined portions of the tubular member 130 are joined by the joining device 300 to divide the inner space 131 into the first inner space 131 (1) and the second inner space 131 (2).

[0190] exist Figure 5A In the embodiment, a portion of the cylindrical member 130 between the first winding axis 210 ( 1 ) and the second winding axis 210 ( 2 ) is set as a predetermined portion.

[0191] As the joining device 300, a known joining device can be used. For example, an ultrasonic welding machine is used. The ultrasonic welding machine includes an ultrasonic welding vibrator 310 (1) and a receiving platform 310 (2) arranged at relative positions across the cylindrical member 130 along the third direction (Z direction). The ultrasonic welding vibrator 310 (1) has an ultrasonic vibrator that generates mechanical ultrasonic vibrations and a horn that transmits ultrasonic vibrations. The joining device 300 moves the ultrasonic welding vibrator 310 (1) and the receiving platform 310 (2) along the third direction toward the cylindrical member 130, and applies pressure and ultrasonic vibrations to a predetermined portion of the cylindrical member 130.

[0192] Thus, the joint 140 is formed at a predetermined position of the cylindrical member 130. That is, the inner space 131 of the cylindrical member 130 is divided into a first inner space 131 (1) and a second inner space 131 (2). One end of the first inner space 131 (1) is closed by the joint 140, and the other end is open (opening 131a). One end of the second inner space 131 (2) is open (opening 131b), and the other end is closed by the joint 140.

[0193] Next, in step A3 , a predetermined portion of the joint portion 140 formed on the cylindrical member 130 is cut by the cutting device 500 .

[0194] exist Figure 5BIn order to move the cylindrical member 130 along the second direction to the second position where the cutting device 500 is arranged, the cylindrical member 130 is held by the holding device 400. The holding device 400 includes a first holding portion 410 (1) and a second holding portion 410 (2). The first holding portion 410 (1) includes a first holding member 420 (1) and a second holding member 430 (1) that clamp the cylindrical member 130 at a portion closer to the second side than the joint 140 along the extension direction (R direction). The second holding portion 410 (2) includes a third holding member 420 (2) and a fourth holding member 430 (2) that clamp the cylindrical member 130 at a portion closer to the first side than the joint 140 along the extension direction (R direction).

[0195] After the cylindrical member 130 is held by the holding device 400, the first winding shaft 210 (1) and the second winding shaft 210 (2) are moved to a standby position where the interval between the first top end portion 212 (1) and the second top end portion 212 (2) is longer. As a result, the first top end portion 212 (1) and the second top end portion 212 (2) are released from the first inner space 131 (1) and the second inner space 131 (2) of the cylindrical member 130.

[0196] Here, the outer peripheral surfaces of the first top end portion 212 (1) and the second top end portion 212 (2) are formed so that the outer diameters become smaller as they go toward the top ends. Thus, the first top end portion 212 (1) and the second top end portion 212 (2) can be easily pulled out from the first inner space 131 (1) and the second inner space 131 (2).

[0197] Then, the predetermined portion of the joint portion 140 of the tubular member 130 moved to the second position is cut by the cutting device 500 .

[0198] exist Fig. 6A In the embodiment, the cutting device 500 includes a blade portion 510 having a blade 511 extending linearly. The blade 511 cuts the joint portion 140 of the tubular member 130 in the second direction.

[0199] Thus, the tubular member 130 is divided into the first tubular member 130 ( 1 ) having the first inner space 131 ( 1 ) and the second tubular member 130 ( 2 ) having the second inner space 131 ( 2 ).

[0200] Next, in step A4, the first cylindrical member 130 (1) and the second cylindrical member 130 (2) are stored by the storage device 600.

[0201] When storing the first cylindrical member 130 ( 1 ) and the second cylindrical member 130 ( 2 ), the first cylindrical member 130 ( 1 ) and the second cylindrical member 130 ( 2 ) are moved along the second direction to the third position where the storing device 600 is arranged.

[0202] exist Figure 6B In the embodiment, the storage device 600 includes a storage portion 610 that stores the first cylindrical member 130 ( 1 ) and the second cylindrical member 130 ( 2 ).

[0203] Then, after the first cylindrical member 130 (1) and the second cylindrical member 130 (2) are moved to the third position, the holding device 400 releases the holding of the first cylindrical member 130 (1) and the second cylindrical member 130 (2). As a result, the first cylindrical member 130 (1) and the second cylindrical member 130 (2) move (fall) toward the first side along the third direction and are stored in the storage portion 610.

[0204] Reference Figure 7 to Figure 14 A first embodiment of the neutral point cover manufacturing apparatus 10 will be described.

[0205] First, refer to Figure 7 to Figure 10 The winding device 200 will be described.

[0206] Figure 7 It is a diagram showing the winding device 200. Figure 8 This is a diagram showing an assembled state of the first winding shaft 230 ( 1 ) and the first guide jig 240 ( 1 ) constituting the winding device 200 . Fig. 9 Observed from the direction of arrow IX Figure 8 The obtained figure. Fig.10 It is a diagram for explaining the operation of the winding device 200.

[0207] The winding device 200 includes a first winding shaft 230 ( 1 ), a second winding shaft 230 ( 2 ), a first guide jig 240 ( 1 ), and a second guide jig 240 ( 2 ).

[0208] The first winding shaft 230 ( 1 ) is configured to be rotatable about a first axis P extending in a first direction and to be movable along the direction in which the first axis P extends.

[0209] The first winding shaft 230 (1) has a first groove 231 (1) and a first top end portion 232 (1). The first groove 231 (1) extends along the extension direction of the first axis P and has an opening portion opened on the outer peripheral surface of the first winding shaft 230 (1) including the first top end portion 232 (1). The outer peripheral surface of the first top end portion 232 (1) is formed so that the outer diameter decreases toward the top end (from the second side to the first side along the first direction).

[0210] The second winding shaft 230 ( 2 ) is configured to be rotatable about a second axis Q extending in the first direction and to be movable along the direction in which the second axis Q extends.

[0211] The second winding shaft 230 (2) has a second groove 231 (2) and a second top end portion 232 (2). The second groove 231 (2) extends along the extension direction of the second axis Q and has an opening portion opened on the outer peripheral surface of the second winding shaft 230 (2) including the second top end portion 232 (2). The outer peripheral surface of the second top end portion 232 (2) is formed so that the outer diameter decreases toward the top end (from the first side to the second side along the first direction).

[0212] The extending direction of the second axis Q is set to coincide with the extending direction of the first axis P (including “substantially coincide”).

[0213] The first winding shaft 230 ( 1 ) and the second winding shaft 230 ( 2 ) are arranged to be spaced apart along the first direction in a state where the first distal end portion 232 ( 1 ) and the second distal end portion 232 ( 2 ) face each other.

[0214] The inner diameters of the first groove 231 ( 1 ) and the second groove 231 ( 2 ) are set so that the insulating film 120 can be wound around the first winding axis 230 ( 1 ) and the second winding axis 230 ( 2 ) with the edge 120 a side of the insulating film 120 inserted.

[0215] In the present embodiment, the first groove 231 (1) (the second groove 231 (2)) has two openings on the outer circumference of the first winding shaft 230 (1) (the second winding shaft 230 (2)) (see Fig. 9 ), but the opening portion can also be one.

[0216] The first guide jig 240 ( 1 ) includes a first guide jig inner space 242 ( 1 ) and a first guide groove 245 ( 1 ).

[0217] The first guide jig inner space 242 (1) is formed by the first inner peripheral surface 241 (1) and extends along the extension direction of the first axis P. The inner diameter of the first guide jig inner space 242 (1) is set to be larger than the outer diameter of the first winding shaft 230 (1). In addition, the inner diameter of the first guide jig inner space 242 (1) is set so that the insulating film 120 can be wound around the first winding shaft 230 (1) a predetermined number of times when the first winding shaft 230 (1) is inserted into the first guide jig inner space 242 (1).

[0218] The first guide groove 245(1) is formed by the first wall surface 243(1) and the second wall surface 244(1), and extends in the first direction (X direction) and the second direction (Y direction). The first guide groove 245(1) has a first opening 245(1)A and a second opening 245(1)B on the first side (Y1 side) and the second side (Y2 side) along the second direction, respectively. That is, the first guide jig inner space 242(1) is connected to the first guide groove 245(1) via the second opening 245(1)B.

[0219] The first wall 243(1) includes a first wall portion 243a(1) and a third wall portion 243b(1), and the third wall portion 243b(1) is disposed at a position closer to the second side (Y2 side) than the first wall portion 243a(1) along the second direction. In addition, the second wall 244(1) includes a second wall portion 244a(1) and a fourth wall portion 244b(1), and the fourth wall portion 244b(1) is disposed at a position closer to the second side (Y2 side) than the second wall portion 244a(1) along the second direction.

[0220] Thus, the first guide groove 245 ( 1 ) includes a first guide groove portion formed by the first wall portion 243 a ( 1 ) and the second wall portion 244 a ( 1 ), and a second guide groove portion formed by the third wall portion 243 b ( 1 ) and the fourth wall portion 244 b ( 1 ).

[0221] The first guide groove portion is formed so that the interval along the third direction (Z direction) becomes shorter as it goes from the first side (Y1 side) along the second direction toward the second side. In addition, the second guide groove portion is formed so that the interval along the third direction is equal ("substantially equal") at a position closer to the second side than the first guide groove portion along the second direction.

[0222] The second guide jig 240 ( 2 ) has a second guide jig inner space 242 ( 2 ) formed by a second inner peripheral surface 241 ( 2 ) and a second guide groove 245 ( 2 ) formed by a third wall surface 243 ( 2 ) and a fourth wall surface 244 ( 2 ) similarly to the first guide jig 240 ( 1 ).

[0223] The third wall surface 243 (2) includes a fifth wall surface portion 243a (2) and a sixth wall surface portion 243b (2) similarly to the first wall surface 243 (1). The fourth wall surface 244 (2) includes a seventh wall surface portion 244a (2) and an eighth wall surface portion 244b (2) similarly to the second wall surface 244 (1).

[0224] The second guide groove 245 ( 2 ) includes a third guide groove portion and a fourth guide groove portion similarly to the first guide groove 245 ( 1 ), and the fourth guide groove portion is arranged on the second side of the third guide groove portion along the second direction.

[0225] In this embodiment, the first winding shaft 230 ( 1 ) and the first guide jig 240 ( 1 ) are configured to be movable in a linked manner along the first direction. In addition, the second winding shaft 230 ( 2 ) and the second guide jig 240 ( 2 ) are configured to be movable in a linked manner along the first direction.

[0226] For example, a first support member (not shown) and a second support member (not shown) movable in a first direction are provided on a base (not shown) of the neutral point cover manufacturing apparatus 10. The first guide jig 240 (1) is mounted on the first support member, and the second guide jig 240 (2) is mounted on the second support member. In addition, the first winding shaft 230 (1) and the second winding shaft 230 (2) are rotatably mounted on the base.

[0227] In addition, in this embodiment, the winding device 200 is set to the winding mode and the standby mode.

[0228] In the winding mode, the interval between the first top end 232 (1) and the second top end 232 (2) is set to be shorter. Specifically, the first winding shaft 230 (1) and the first guide jig 240 (1) move along the first direction toward the first side (X1 side), and the second winding shaft 230 (2) and the second guide jig 240 (2) move along the first direction toward the second side (X2 side).

[0229] In the standby mode, the interval between the first top end portion 232 (1) and the second top end portion 232 (2) is set to be longer. Specifically, the first winding shaft 230 (1) and the first guide jig 240 (1) move along the first direction toward the second side (X2 side), and the second winding shaft 230 (2) and the second guide jig 240 (2) move along the first direction toward the first side (X1 side).

[0230] The operation of the winding device 200 according to this embodiment will be described below.

[0231] When the insulating film 120 is wound up by the winding device 200 , the winding device 200 is set to the winding mode.

[0232] In addition, when winding the insulating film 120, it is necessary that the opening portion of the first groove 231(1) of the first winding shaft 230(1) is opposite to the second opening portion 245(1)B of the first guide groove 245(1) of the first guide jig 240(1), and the opening portion of the second groove 231(2) of the second winding shaft 230(2) is opposite to the fourth opening portion 245(2)B of the second guide groove 245(2) of the second guide jig 240(2).

[0233] Therefore, the winding device 200 includes a rotation position adjusting device (not shown) for adjusting the rotation positions of the first winding shaft 230 ( 1 ) and the second winding shaft 230 ( 2 ). As the rotation position adjusting device, a known rotation position adjusting device can be used.

[0234] In addition, when the first groove 231(1) (the second groove 231(2)) has two opening portions, the rotation position of the first winding shaft 230(1) (the second winding shaft 230(2)) is adjusted so that one opening portion of the first groove 231(1) (the second groove 231(2)) is opposite to the second opening portion 245(1)B of the first guide groove 245(1) (the fourth opening portion 245(2)B of the second guide groove 245(2)).

[0235] The portion of the insulating film 120 on the edge 120a side is inserted into the first groove 231(1) of the first winding shaft 230(1) and the second groove 231(2) of the second winding shaft 230(2) via the first guide groove 245(1) of the first guide jig 240(1) and the second guide groove 245(2) of the second guide jig 240(2).

[0236] In the present embodiment, the interval along the third direction between the first opening 245(1)A of the first guide groove 245(1) and the third opening 245(2)A of the second guide groove 245(2) is set to be long. Thus, the edge 120a of the insulating film 120 can be easily inserted into the first guide groove 245(1) and the second guide groove 245(2).

[0237] In addition, the first guide groove 245(1) and the second guide groove 245(2) include second guide groove portions 245b(1) and 245b(2) at equal intervals along the third direction on the second side (Y2 side) along the second direction. Thus, the edge portion 120a of the insulating film 120 can be reliably inserted into the first groove 231(1) of the first winding shaft 230(1) and the second groove 231(2) of the second winding shaft 230(2).

[0238] With the edge 120a side of the insulating film 120 inserted into the first groove 231(1) and the second groove 231(2), the first winding shaft 230(1) and the second winding shaft 230(2) are rotated in the same direction (at Fig.10 The direction of the arrow R1 is shown in the figure.

[0239] Thus, the insulating film 120 is wound around the first winding axis 230 ( 1 ) and the second winding axis 230 ( 2 ) in the first guide jig inner space 242 ( 1 ) and the second guide jig inner space 242 ( 2 ), thereby forming the cylindrical member 130 .

[0240] like Fig.10 As shown, the length of the cylindrical member 130 along the extension direction R is Mmm, and both ends are open (openings 131a, 131b).

[0241] When the winding of the insulating film 120 is completed, the winding device 200 is set to the standby mode. In addition, in this embodiment, as described later, the winding device 200 is set to the standby mode after the joint portion 140 is formed by the joint device 300.

[0242] Next, refer to Fig.11 The bonding apparatus 300 will be described.

[0243] In this embodiment, an ultrasonic welding machine including an ultrasonic welding vibrator 320 (1) and a receiving platform 320 (2) is used as the bonding device 300. The ultrasonic welding vibrator 320 (1) and the receiving platform 320 (2) are respectively configured to be movable along the third direction to the second side (Z2 side) and the first side (Z1 side). A plurality of ribs are formed on the mutually opposing surfaces of the ultrasonic welding vibrator 320 (1) and the receiving platform 320 (2).

[0244] The ultrasonic welding machine includes a pressurizing device for pressing the ultrasonic welding vibrator 320 ( 1 ) toward the first side ( Z1 side) along the third direction, although illustration of the device is omitted.

[0245] In the present embodiment, the cylindrical member 130 is joined in a state where the first top end portion 231(1) of the first winding shaft 230(1) and the second top end portion 231(2) of the second winding shaft 230(2) are inserted into both ends of the inner space 131 of the cylindrical member 130. Therefore, the ultrasonic welding vibrator 320(1) and the receiving base 320(2) are arranged between the first top end portion 231(1) and the second top end portion 231(2) arranged at the winding position.

[0246] The bonding device 300 is set to a bonding mode and a standby mode. In the bonding mode, the cylindrical member 130 is pressed by the ultrasonic welding vibrator 320 (1) and the receiving platform 320 (2). Specifically, the ultrasonic welding vibrator 320 (1) moves toward the first side along the third direction, and the receiving platform 320 (2) moves toward the second side along the third direction.

[0247] In the standby mode, the ultrasonic welding vibrator 320 (1) and the receiving stand 320 (2) release the pressure on the cylindrical member 130. Specifically, the ultrasonic welding vibrator 320 (1) moves toward the second side along the third direction, and the receiving stand 320 (2) moves toward the first side along the third direction.

[0248] The joint portion 140 is formed at a predetermined position of the cylindrical member 130 by the joint device 300. The joint portion 140 has joint surface 141 and 142 extending in the first direction and the second direction on both sides along the third direction. The joint surface 141 and 142 extend in parallel (including "substantially parallel").

[0249] The inner space 131 of the cylindrical member 130 is divided into a first inner space 131 (1) and a second inner space 131 (2) by the joint 140. One end of the first inner space 131 (1) is closed by the joint 140, and the other end is open (opening 131a). One end of the second inner space 131 (2) is open (opening 131b), and the other end is closed by the joint 140.

[0250] Next, refer to Fig.12 The holding device 400 will be described.

[0251] Here, when the bonding device 300 is set to the bonding mode, the cylindrical member 130 (insulating film 120) is pressed by the ultrasonic welding vibrator 320 (1) and the receiving stand 320 (2). That is, the cylindrical member 130 is sandwiched between the ultrasonic welding vibrator 320 (1) and the receiving stand 320 (2).

[0252] In the present embodiment, in this state, the winding device 200 is set to the standby mode. The outer peripheral surface of the first top end portion 232 (1) and the second top end portion 232 (2) is formed so that the outer diameter decreases as it goes toward the top. Therefore, when the winding device 200 is set to the standby mode, the first top end portion 232 (1) and the second top end portion 232 (2) can be easily pulled out from the first inner space 131 (1) and the second inner space 131 (2) of the tubular member 130.

[0253] Then, in a state where the cylindrical member 130 is held by the holding device 400 , the joining device 300 is set to the standby mode.

[0254] The holding device 400 includes a first holding portion 440 ( 1 ) and a second holding portion 440 ( 2 ) which are arranged to be spaced apart from each other along the first direction.

[0255] In this embodiment, as described later, the joint 140 is cut by the cutting device 500. Therefore, the first holding portion 440 (1) and the second holding portion 440 (2) are configured to hold both sides of the joint 140 along the extending direction (R direction) of the cylindrical member 130.

[0256] The first holding portion 440 ( 1 ) includes a first holding member 450 ( 1 ) and a second holding member 460 ( 1 ) that sandwich the cylindrical member 130 .

[0257] The first holding member 450 ( 1 ) has an end surface 451 ( 1 ) on the side facing the second holding member 460 ( 1 ).

[0258] The second holding member 460 (1) has an end face 461 (1) on the side opposite to the first holding member 450 (1). A recessed portion 463 (1) is formed on the end face 461 (1) through a notch surface 462 (1). The recessed portion 463 (1) is recessed toward the side opposite to the side opposite to the first holding member 450 (1). The recessed portion 463 (1) is formed into a shape capable of inserting the cylindrical member 130.

[0259] The cylindrical member 130 is sandwiched between the end surface 451 ( 1 ) of the first holding member 450 ( 1 ) and the notch surface 462 ( 1 ) of the second holding member 460 ( 1 ). In the present embodiment, the movement of the cylindrical member 130 in the second direction and the third direction is restricted.

[0260] The second holding portion 440 (2) includes a third holding member 450 (2) and a fourth holding member 460 (2). The third holding member 450 (2) has an end surface 451 (2) similarly to the first holding member 450 (1). The fourth holding member 460 (2) has an end surface 461 (2), a notch surface 462 (2) and a recessed portion 463 (2) similarly to the second holding member 460 (1).

[0261] The holding device 400 is set to a holding mode and a holding release mode.

[0262] In the holding mode, the first holding portion 440(1) and the second holding portion 440(2) hold the cylindrical member 130. Specifically, the first holding member 450(1) and the third holding member 450(2) move toward the second side along the third direction, and the second holding member 460(1) and the fourth holding member 460(2) move toward the first side along the third direction.

[0263] In the hold release mode, the first holding portion 440 (1) and the second holding portion 440 (2) release the holding of the cylindrical member 130. Specifically, the first holding member 450 (1) and the third holding member 450 (2) move toward the first side along the third direction, and the second holding member 460 (1) and the fourth holding member 460 (2) move toward the second side along the third direction.

[0264] In addition, in the present embodiment, the holding device 400 includes a moving device (not shown) that moves the first holding portion 440 (1) and the second holding portion 440 (2) along the first direction. As the moving device, a known moving device can be used. The moving device can move the first holding portion 440 (1) and the second holding portion 440 (2) along the second direction to a first position where the winding device 200 and the joining device 300 are arranged, a second position where the cutting device 500 is arranged, and a third position where the storage device 600 is arranged.

[0265] Next, refer to Fig.13A , Fig. 13B The cutting device 500 will be described. Fig.13A is a perspective view of the cutting device 500. In addition, Fig. 13B Observe from the direction of arrow XIII-XIII Fig.13A Obtained cross-sectional view.

[0266] The cutting device 500 includes a blade 520 and a mounting table 530 .

[0267] The blade 520 has a blade 521 extending linearly. The blade 520 is arranged so that the blade 521 extends in a direction intersecting the extending direction (R direction) of the cylindrical member 130. In the present embodiment, the blade 520 is arranged so that the blade 521 extends along the second direction.

[0268] The mounting table 530 has an end surface 531 on the side opposite to the blade 520. A recess 533 is formed on the end surface 531. The recess 533 is formed by the notch surface 532 and extends along the first direction. The recess 533 is formed to accommodate the cylindrical member 130 in a state where the movement along the second direction is restricted.

[0269] In addition, in the end surface 531, a hole 534 extending in the second direction (Y direction) and the third direction (Z direction) is formed in the middle of the recess 533 along the first direction (X direction). The hole 534 is formed so that the blade 521 can be inserted. Specifically, the width of the hole 534 along the first direction is set to be longer than the width of the blade 521, and the length of the hole 534 along the second direction (Y direction) is set to be longer than the length of the blade 521. In addition, the depth of the hole 534 along the third direction (Z direction) is set to a length such that the joint 140 of the cylindrical member 130 inserted into the recess 533 can be cut off by moving the blade 521 in the hole 534 along the third direction. In the present embodiment, the hole 534 passes through the mounting table 530.

[0270] In this embodiment, if Fig. 13BIt is configured such that, when observed in a cross-section orthogonal (including "substantially orthogonal") to the extending direction (R direction) of the cylindrical member 130, the angle H formed by the extension line 140a of the joint portion 140 of the cylindrical member 130 inserted into the recess 533 and the extension line 521a of the blade 521 is an acute angle. Preferably, the angle H is set to be greater than 0 degrees and equal to or less than 45 degrees (satisfying [0 degrees < H ≤ 45 degrees]). In Fig. 13B a cross-section orthogonal (including "substantially orthogonal") to the extending direction (R direction) of the cylindrical member 130 of the joint portion 140 is shown. The extension line 140a of the joint portion 140 is the extension line of the joint surface 141 or 142.

[0271] If the blade 521 is brought into perpendicular contact with the joint portion 140, there may be cutting defects, cutting burrs, etc. If the neutral point is covered with a cylindrical member having cutting defects, cutting burrs, etc., there may be insulation defects.

[0272] In the present embodiment, the blade 521 is brought into contact with the joint portion 140 obliquely, so that cutting defects, cutting burrs, etc. can be prevented. Thus, the occurrence of insulation defects caused by cutting defects, cutting burrs, etc. can be prevented.

[0273] The operation of the cutting device 500 will be described below.

[0274] When cutting a predetermined portion of the joint portion 140 of the cylindrical member 130, the first holding portion 440(1) and the second holding portion 440(2) holding the cylindrical member 130 are moved along the second direction to the second position where the cutting device 500 is disposed.

[0275] Then, the cutting device 500 is set to the cutting mode.

[0276] When the cutting device 500 is set to the cutting mode, first, the blade portion 520 and the mounting table 530 are moved along the third direction toward each other. Specifically, the blade portion 520 moves along the third direction to the first side, and the mounting table 530 moves along the third direction to the second side. By the mounting table 530 moving along the third direction to the second side, the cylindrical member 130 is inserted into the recess 533 of the mounting table 530. And by the blade portion 520 moving along the third direction to the first side, a predetermined portion of the joint portion 140 of the cylindrical member 130 inserted into the recess 533 of the mounting table 530 is cut.

[0277] Thereby, the joint portion 140 is divided into a first joint portion 140(1) and a second joint portion 140(2). That is, the cylindrical member 130 is divided into a first cylindrical member 130(1) having a first inner space 131(1) and a second cylindrical member 130(2) having a second inner space 131(2) (refer to Fig.14).

[0278] After the predetermined portion of the joint portion 140 of the cylindrical member 130 is cut, the blade 520 and the mounting table 530 are moved in directions away from each other. Specifically, the blade 520 moves toward the second side along the third direction, and the mounting table 530 moves toward the first side along the third direction.

[0279] An appropriate method can be used as a method for setting the timing for switching the movement direction of the blade 520 and the mounting table 530 along the third direction. For example, the movement direction is switched based on the position of the blade 520 (blade 521) and the mounting table 530 along the third direction.

[0280] Next, refer to Fig.14 The storage device 600 will be described.

[0281] In the present embodiment, the storage device 600 includes a first storage portion 620 ( 1 ), a second storage portion 620 ( 2 ), and a distribution member 630 .

[0282] When the first holding portion 440 (1) and the second holding portion 440 (2) are moved to the third position, the first storing portion 620 (1) and the second storing portion 620 (2) are arranged along the first direction at a position closer to the first side (lower) of the first cylindrical member 130 (1) and the second cylindrical member 130 (2) held by the first holding portion 440 (1) and the second holding portion 440 (2) along the third direction.

[0283] Furthermore, the distribution member 630 is arranged between the first storage section 620 ( 1 ) and the second storage section 620 ( 2 ) at a position closer to the second side (upper) than the first storage section 620 ( 1 ) and the second storage section 620 ( 2 ) along the third direction.

[0284] In addition, the distribution member 630 is configured so that when the first cylindrical member 130 (1) and the second cylindrical member 130 (2) held by the first holding portion 440 (1) and the second holding portion 440 (2) move (fall) toward the first side (downward) along the third direction, a portion of the first cylindrical member 130 (1) on the first joining portion 140 (1) side and a portion of the second cylindrical member 130 (2) on the second joining portion 140 (2) side abut against the distribution member 630.

[0285] The operation of the storage device 600 will be described below.

[0286] When storing the first cylindrical member 130 (1) and the second cylindrical member 130 (2), after moving the first cylindrical member 130 (1) and the second cylindrical member 130 (2) to the third position, the holding device 400 is set to the holding release mode. As a result, the first cylindrical member 130 (1) and the second cylindrical member 130 (2) held by the first holding portion 440 (1) and the second holding portion 440 (2) move (fall) toward the first side along the third direction. At this time, the first cylindrical member 130 (1) moves (falls) toward the first storage portion 620 (1) side by abutting against the distribution member 630 on the side of the first engaging portion 140 (1). In addition, the second cylindrical member 130 (2) moves (falls) toward the second storage portion 620 (2) side by abutting against the distribution member 630 on the side of the second engaging portion 140 (2).

[0287] In the present embodiment, the first cylindrical member 130 ( 1 ) and the second cylindrical member 130 ( 2 ) can be housed in the first housing portion 620 ( 1 ) and the second housing portion 620 ( 2 ) which are different from each other.

[0288] Here, the winding direction of the insulating film 120 is different between the first cylindrical member 130 (1) and the second cylindrical member 130 (2). For example, the winding direction of the first cylindrical member 130 (1) viewed from the opening 131a side is different from the winding direction of the second cylindrical member 130 (2) viewed from the opening 131b side.

[0289] In this embodiment, an appropriate neutral point cover can be selected based on the winding direction.

[0290] Next, refer to Figures 15 to 20 A second embodiment of the neutral point cover manufacturing apparatus 10 will be described.

[0291] The neutral point cover manufacturing device 10 according to the second embodiment includes a winding device 200 , a joining device 300 , a holding device 400 , a cutting device 500 , and a storage device 600 .

[0292] In this embodiment, the same bonding apparatus as the bonding apparatus 300 of the first embodiment is used.

[0293] Hereinafter, points different from the first embodiment will be described.

[0294] Reference Figure 15 to Figure 18 The winding device 200 of this embodiment will be described.

[0295] Fig.15 It is a diagram showing the winding device 200. Fig.16 This is a diagram showing an assembled state of the first winding shaft 250 ( 1 ) and the first guide jig 260 ( 1 ) constituting the winding device 200 . Fig.17 Observed from the direction of arrow XVII Fig.16 The obtained figure. Fig.18 It is a diagram for explaining the operation of the winding device 200.

[0296] The winding device 200 of the present embodiment includes a first winding shaft 250 ( 1 ), a second winding shaft 250 ( 2 ), a first guide jig 260 ( 1 ), and a second guide jig 260 ( 2 ).

[0297] The winding device 200 of the present embodiment is different from the winding device 200 of the first embodiment in the guide groove of the guide jig.

[0298] The first guide groove 265(1) of the first guide jig 260(1) is formed by the first wall surface 263(1) and the second wall surface 264(1). In addition, the second guide groove 265(2) of the second guide jig 260(2) is formed by the third wall surface 263(2) and the fourth wall surface 264(2).

[0299] The first guide groove 265 ( 1 ) and the second guide groove 265 ( 2 ) are formed such that the interval along the third direction becomes smaller as going from the first side toward the second side along the second direction.

[0300] In the present embodiment, the first wall surface 263 (1) corresponds to the "first wall surface portion of the first wall surface" of the present invention, the second wall surface 264 (1) corresponds to the "second wall surface portion of the second wall surface" of the present invention, the third wall surface 263 (2) corresponds to the "fifth wall surface portion of the third wall surface" of the present invention, and the fourth wall surface 264 (2) corresponds to the "seventh wall surface portion of the fourth wall surface" of the present invention. In addition, the first guide groove 265 (1) corresponds to the "first guide groove portion of the first guide groove" of the present invention, and the second guide groove 265 (2) corresponds to the "second guide groove portion of the second guide groove" of the present invention.

[0301] Reference Fig.19A The holding device 400 of this embodiment will be described.

[0302] The first holding portion 470 ( 1 ) and the second holding portion 470 ( 2 ) of the holding device 400 of the present embodiment are different from the first holding portion 440 ( 1 ) and the second holding portion 440 ( 2 ) of the first embodiment.

[0303] The first holding portion 470 ( 1 ) includes a first holding member 480 ( 1 ) and a second holding member 490 ( 1 ). In addition, the second holding portion 470 ( 2 ) includes a third holding member 480 ( 2 ) and a fourth holding member 490 ( 2 ).

[0304] The first holding part 470(1) clamps the cylindrical member 130 by using the end face 481(1) of the first holding member 480(1) and the end face 491(1) of the second holding member 490(1). In addition, the second holding part 470(2) clamps the cylindrical member 130 by using the end face 481(2) of the third holding member 480(2) and the end face 491(2) of the fourth holding member 490(2).

[0305] Refer to Fig.19A , Fig.19B to describe the cutting device 500 of the present embodiment. Fig.19A is a perspective view of the cutting device 500. In addition, Fig.19B is a cross-sectional view obtained by observing from the direction of arrow XIX-XIX. Fig.19A

[0306] The cutting device 500 of the present embodiment includes a blade part 540. The blade part 540 has a blade 541 extending in a straight line.

[0307] In the present embodiment, it is also configured that when observed in a cross-section orthogonal (including "substantially orthogonal") to the extending direction (R direction) of the cylindrical member 130, the angle H formed by the extension line 140a of the joint part 140 of the cylindrical member 130 and the extension line 541a of the blade 541 is an acute angle, and the cylindrical member 130 is held by the first holding part 470(1) and the second holding part 470(2). Preferably, the angle H is set to be greater than 0 degree and 45 degrees or less (satisfying [0 degree < H ≤ 45 degrees]).

[0308] Refer to Fig. 20 to describe the storage device 600 of the present embodiment.

[0309] In the present embodiment, the storage device 600 includes a common storage part 640.

[0310] In a state where the first holding part 470(1) and the second holding part 470(2) are moved to the third position, the storage part 640 is arranged at a position on the first side along the third direction and closer than the first cylindrical member 130(1) and the second cylindrical member 130(2) held by the first holding part 470(1) and the second holding part 470(2).

[0311] In the present embodiment, the first cylindrical member 130(1) and the second cylindrical member 130(2) are stored in the common storage part 640.

[0312] The present invention can also be configured as follows.

[0313] (Mode 1) A manufacturing device for a winding connection part cover, which is used to manufacture a winding connection part cover that covers a winding connection part to which a plurality of stator windings are connected, and is characterized by including: ​

[0314] A winding device including a winding shaft rotatable about an axis extending in a first direction, and winding an insulating film of a predetermined shape around the winding shaft to form a cylindrical member having an inner space with both ends open;

[0315] a joining device that forms a joining portion at a predetermined position of the cylindrical member to divide the inner space into a first inner space and a second inner space; and

[0316] A cutting device cuts a predetermined portion of the joint formed in the cylindrical member to separate the cylindrical member into a first cylindrical member and a second cylindrical member.

[0317] (Mode 2) The manufacturing device for the winding connection portion cover according to Mode 1 is characterized in that:

[0318] The winding shaft includes a first winding shaft rotatable around a first axis extending in the first direction, and a second winding shaft rotatable around a second axis extending in the first direction.

[0319] The first winding shaft and the second winding shaft are arranged such that a first distal end portion of the first winding shaft and a second distal end portion of the second winding shaft face each other along the first direction.

[0320] The winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft.

[0321] (Mode 3) The manufacturing device for the winding connection portion cover according to Mode 2 is characterized in that:

[0322] The first winding axis is configured to be movable along the first direction.

[0323] The second winding shaft is configured to be movable along the first direction.

[0324] (Mode 4) The manufacturing device for the winding connection portion cover according to Mode 2 or 3, characterized in that:

[0325] The insulating film extends in a width direction and a length direction intersecting each other,

[0326] The winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft in a state where a portion of the insulating film on one end side along the longitudinal direction is locked to the first winding shaft and the second winding shaft.

[0327] (Mode 5) The manufacturing device of the winding connection portion cover according to any one of Modes 2 to 4, characterized in that:

[0328] The first winding shaft has a first groove, which extends along the first direction and has an opening portion opened on the outer peripheral surface of the first winding shaft including the first top end portion, and the second winding shaft has a second groove, which extends along the first direction and has an opening portion opened on the outer peripheral surface of the second winding shaft including the second top end portion. The winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft in a state where the portion of the insulating film along the one end side of the longitudinal direction is inserted into the first groove of the first winding shaft and the second groove of the second winding shaft.

[0329] (Mode 6) The manufacturing device for the winding connection portion cover according to Mode 5 is characterized in that:

[0330] The winding device includes a guide jig that guides a portion of the insulating film on the one end side along the longitudinal direction toward the first groove of the first winding shaft and the second groove of the second winding shaft.

[0331] (Mode 7) The manufacturing device for the winding connection portion cover according to Mode 6 is characterized in that:

[0332] The guiding jig includes a first guiding jig and a second guiding jig,

[0333] The first guide jig has a first guide groove extending in the first direction and in a second direction intersecting the first direction, and the first guide groove has a first opening and a second opening on a first side and a second side along the second direction, respectively.

[0334] The second guide jig has a second guide groove extending in the first direction and the second direction, and the second guide groove has a third opening and a fourth opening on the first side and the second side respectively along the second direction.

[0335] The winding device is configured to insert the portion of the insulating film on the one end side along the longitudinal direction into the first groove of the first winding shaft via the first guide groove of the first guide jig, and to insert the portion into the second groove of the second winding shaft via the second guide groove of the second guide jig.

[0336] (Mode 8) The manufacturing device for the winding connection portion cover according to Mode 7 is characterized in that:

[0337] The first winding shaft is configured to be movable along the first direction together with the first guide jig.

[0338] The second winding shaft is configured to be movable along the first direction together with the second guide jig.

[0339] (Mode 9) The manufacturing device for the winding connection portion cover according to Mode 7 or 8, characterized in that:

[0340] The first guide groove has a first guide groove portion formed such that a spacing along a third direction intersecting the first direction and the second direction decreases as going from the first side along the second direction toward the second side,

[0341] The second guide groove includes a second guide groove portion formed such that a spacing along the third direction decreases as going from the first side toward the second side along the second direction.

[0342] (Mode 10) The manufacturing device for the winding connection portion cover according to Mode 9 is characterized in that:

[0343] The first guide groove has a third guide groove portion, the third guide groove portion is arranged closer to the second side than the first guide groove portion along the second direction, and the third guide groove portion is arranged at equal intervals along the third direction.

[0344] The second guide groove has fourth guide groove portions that are arranged closer to the second side than the second guide groove portions along the second direction and are spaced evenly apart along the third direction.

[0345] (Mode 11) The manufacturing device of the winding connection portion cover according to any one of Modes 7 to 10, characterized in that:

[0346] The first guide jig has a first guide jig inner space extending along the first direction, the first guide jig inner space has an inner diameter larger than an outer diameter of the first winding shaft and is communicated with the second opening of the first guide groove,

[0347] The second guide jig has a second guide jig inner space extending along the first direction, the second guide jig inner space has an inner diameter larger than an outer diameter of the second winding shaft and is communicated with the fourth opening of the second guide groove,

[0348] The first winding shaft is inserted into the inner space of the first guide jig in a manner rotatable relative to the first guide jig.

[0349] The second winding shaft is inserted into the second guide jig inner space so as to be rotatable relative to the second guide jig.

[0350] (Mode 12) The manufacturing device for the winding connection portion cover according to Mode 11 is characterized in that:

[0351] The winding device is configured to adjust the rotation position of the first winding shaft so that the opening of the first groove is opposite to the second opening of the first guide groove, and to adjust the rotation position of the second winding shaft so that the opening of the second groove is opposite to the fourth opening of the second guide groove when the portion of the insulating film along the length direction is inserted into the first groove of the first winding shaft and the second groove of the second winding shaft.

[0352] (Mode 13) The manufacturing device of the winding connection portion cover according to any one of Modes 2 to 12, characterized in that:

[0353] The outer peripheral surface of the first distal end portion of the first winding shaft is formed so that the outer diameter increases as it goes from the second distal end portion side of the second winding shaft toward the side opposite to the second distal end portion along the first direction.

[0354] The outer peripheral surface of the second distal end portion of the second winding shaft is formed so that the outer diameter increases as going from the first distal end portion side of the first winding shaft toward the side opposite to the first distal end portion along the first direction.

[0355] (Mode 14) The manufacturing device of the winding connection portion cover according to any one of Modes 1 to 13, characterized in that:

[0356] The manufacturing device includes a holding device that holds the cylindrical member having the joining portion formed therein.

[0357] (Mode 15) The manufacturing device for the winding connection portion cover according to Mode 14 is characterized in that:

[0358] The holding device includes a first holding portion and a second holding portion, wherein the first holding portion and the second holding portion respectively hold a portion of the tubular member that is closer to one side than the joining portion and a portion that is closer to the other side than the joining portion along the extension direction, the first holding portion having a first holding member and a second holding member that clamp the portion on one side, and the second holding portion having a third holding member and a fourth holding member that clamp the portion on the other side.

[0359] (Mode 16) The manufacturing device of the winding connection portion cover according to any one of Modes 1 to 15, characterized in that:

[0360] The manufacturing device includes a storage device including a storage portion that stores the first cylindrical member and the second cylindrical member.

[0361] (Mode 17) A manufacturing device for a winding connection portion cover according to Mode 16, characterized in that the storage device includes a first storage portion, a second storage portion, and a distribution member, and the distribution member distributes the first cylindrical member and the second cylindrical member to the first storage portion and the second storage portion, respectively.

[0362] (Aspect 18) The manufacturing device for the winding connection portion cover according to any one of aspects 1 to 17, characterized in that:

[0363] The cutting device is configured to include a blade portion having a blade extending linearly, wherein an angle formed by the extending direction of the blade and the extending direction of the joining portion is an acute angle when viewed in a cross section perpendicular to the extending direction of the cylindrical member.

[0364] (Mode 19) A method for manufacturing a winding connection portion cover for covering a winding connection portion to which a plurality of stator windings are connected, characterized in that the method comprises the following steps:

[0365] An insulating film of a predetermined shape is wound around a winding shaft that can rotate around an axis extending in a first direction to form a cylindrical member having an inner space with both ends open;

[0366] forming a joint portion at a predetermined position of the cylindrical member to divide the inner space into a first inner space and a second inner space;

[0367] A predetermined portion of the joint formed on the cylindrical member is cut to separate the cylindrical member into a first cylindrical member and a second cylindrical member.

[0368] (Mode 20) The method for manufacturing a winding connection portion cover according to Mode 19, characterized in that:

[0369] In the step of forming the cylindrical member, the insulating film is wound around a first winding axis and a second winding axis, the first winding axis being rotatable about a first axis extending in the first direction, and the second winding axis being rotatable about a second axis extending in the first direction and being arranged separately from the first winding axis along the first direction.

[0370] The present invention is not limited to the configurations described in the embodiments, and various changes, additions, and deletions can be made.

[0371] The above description describes the case of manufacturing a neutral point cover covering the neutral point of a three-phase stator winding, but the present invention can be applied to the case of manufacturing a winding connection portion cover that covers a winding connection portion to which a plurality of stator windings are connected.

[0372] As the insulating film, a known insulating film can be used.

[0373] The insulating film supply device may be any device as long as it can supply an insulating film having a predetermined shape (width, length) to the winding device, and is not limited to the insulating film supply device described in the embodiment.

[0374] The winding device is not limited to the winding device described in the embodiment as long as it can wind the insulating film of a predetermined shape around the winding shaft to form a cylindrical member with an inner space opened at both ends. For example, the number of winding shafts and the number of guide jigs are not limited to "2". In addition, the groove of the winding shaft and the guide jig can also be omitted.

[0375] The joining device is not limited to the joining device described in the embodiment as long as it can form a joining portion at a predetermined position of the cylindrical member and divide the inner space of the cylindrical member into a first inner space and a second inner space. For example, a joining device other than an ultrasonic welding machine can also be used.

[0376] The cutting device is not limited to the cutting device described in the embodiment as long as it can cut a predetermined portion of the joint of the tubular member to separate the tubular member into a first tubular member having a first inner space and a second tubular member having a second inner space.

[0377] The storage device is not limited to the storage device described in the embodiment.

[0378] In an embodiment, the winding device, the joining device, the cutting device, and the storage device are arranged at different positions (first position, second position, and third position) along the first direction in consideration of interference between devices. However, multiple devices can also be arranged at the same position without considering interference.

[0379] In addition, the structure of the holding device for moving the cylindrical member to a different position is not limited to the structure described in the embodiment. Furthermore, the holding device can also be omitted.

[0380] Each configuration described in the embodiment may be used alone or in combination of a plurality of appropriately selected configurations.

Claims

1. A winding connection portion cover manufacturing device, which is used to manufacture a winding connection portion cover that covers a winding connection portion to which a plurality of stator windings are connected, characterized in that: have: A winding device including a winding shaft rotatable about an axis extending in a first direction, and winding an insulating film of a predetermined shape around the winding shaft to form a cylindrical member having an inner space with both ends open; a joining device which forms a joining portion at a predetermined position of the cylindrical member to divide the inner space into a first inner space and a second inner space; as well as A cutting device cuts a predetermined portion of the joint formed in the tubular member to separate the tubular member into a first tubular member having the first inner space and a second tubular member having the second inner space.

2. The manufacturing device of the winding connection portion cover according to claim 1, characterized in that: The winding shaft includes a first winding shaft rotatable around a first axis extending in the first direction, and a second winding shaft rotatable around a second axis extending in the first direction. The first winding shaft and the second winding shaft are arranged such that a first distal end portion of the first winding shaft and a second distal end portion of the second winding shaft face each other along the first direction. The winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft.

3. The manufacturing device of the winding connection portion cover according to claim 2, characterized in that: The first winding shaft and the second winding shaft are configured to be movable along the first direction.

4. The manufacturing device of the winding connection portion cover according to claim 2, characterized in that: The insulating film extends in a width direction and a length direction intersecting each other, The winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft in a state where a portion of the insulating film on one end side along the longitudinal direction is locked to the first winding shaft and the second winding shaft.

5. The manufacturing device of the winding connection portion cover according to claim 4, characterized in that: The first winding shaft has a first groove extending along the first direction and having an opening portion opening on an outer peripheral surface of the first winding shaft including the first distal end portion. The second winding shaft has a second groove extending along the first direction and having an opening portion opening on an outer peripheral surface of the second winding shaft including the second distal end portion. The winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft in a state where the portion of the insulating film on the one end side along the longitudinal direction is inserted into the first groove of the first winding shaft and the second groove of the second winding shaft.

6. The manufacturing device of the winding connection portion cover according to claim 5, characterized in that: The winding device includes a guide jig that guides a portion of the insulating film on the one end side along the longitudinal direction toward the first groove of the first winding shaft and the second groove of the second winding shaft.

7. The manufacturing device of the winding connection portion cover according to claim 6, characterized in that: The guiding jig includes a first guiding jig and a second guiding jig, The first guide jig has a first guide groove extending in the first direction and in a second direction intersecting the first direction, and the first guide groove has a first opening and a second opening on a first side and a second side along the second direction, respectively. The second guide jig has a second guide groove extending in the first direction and the second direction, and the second guide groove has a third opening and a fourth opening on the first side and the second side respectively along the second direction. The winding device is configured to insert the portion of the insulating film on the one end side along the longitudinal direction into the first groove of the first winding shaft via the first guide groove of the first guide jig, and to insert the portion into the second groove of the second winding shaft via the second guide groove of the second guide jig.

8. The manufacturing device of the winding connection portion cover according to claim 7, characterized in that: The first winding shaft and the first guide jig are configured to be movable in the first direction in a linked manner. The second winding shaft and the second guide jig are configured to be movable in the first direction in a linked manner.

9. The manufacturing device of the winding connection portion cover according to claim 7, characterized in that: The first guide groove has a first guide groove portion formed such that a spacing along a third direction intersecting the first direction and the second direction decreases as going from the first side along the second direction toward the second side, The second guide groove includes a second guide groove portion formed such that a spacing along the third direction decreases as going from the first side toward the second side along the second direction.

10. The manufacturing device of the winding connection portion cover according to claim 9, characterized in that: The first guide groove has a third guide groove portion, the third guide groove portion is arranged at a position closer to the second side than the first guide groove portion along the second direction, and the intervals along the third direction are equal, The second guide groove has fourth guide groove portions that are arranged closer to the second side than the second guide groove portions along the second direction and are spaced evenly apart along the third direction.

11. The manufacturing device for a winding connection portion cover according to any one of claims 7 to 10, characterized in that: The first guide jig has a first guide jig inner space extending along the first direction, the first guide jig inner space has an inner diameter larger than an outer diameter of the first winding shaft and is communicated with the second opening of the first guide groove, The second guide jig has a second guide jig inner space extending along the first direction, the second guide jig inner space has an inner diameter larger than an outer diameter of the second winding shaft and is communicated with the fourth opening of the second guide groove, The first winding shaft is inserted into the inner space of the first guide jig in a manner rotatable relative to the first guide jig. The second winding shaft is inserted into the second guide jig inner space so as to be rotatable relative to the second guide jig.

12. The manufacturing device of the winding connection portion cover according to claim 11, characterized in that: The winding device is configured to adjust the rotation position of the first winding shaft so that the opening of the first groove is opposite to the second opening of the first guide groove, and to adjust the rotation position of the second winding shaft so that the opening of the second groove is opposite to the fourth opening of the second guide groove when the portion of the insulating film along the length direction is inserted into the first groove of the first winding shaft and the second groove of the second winding shaft.

13. The manufacturing device of the winding connection portion cover according to any one of claims 2 to 10, characterized in that: The outer peripheral surface of the first leading end portion of the first winding shaft is formed so that the outer diameter decreases as it goes from the second side toward the first side along the first direction. The outer peripheral surface of the second distal end portion of the second winding shaft is formed so that the outer diameter thereof decreases as going from the first side toward the second side of the first winding shaft along the first direction.

14. The manufacturing device for a winding connection portion cover according to any one of claims 1 to 10, characterized in that: The manufacturing device includes a holding device that holds the cylindrical member having the joining portion formed therein.

15. The manufacturing device of the winding connection portion cover according to claim 14, characterized in that: The holding device includes a first holding portion and a second holding portion, wherein the first holding portion and the second holding portion respectively hold a portion of the cylindrical member closer to one side than the joining portion and a portion closer to the other side than the joining portion along an extending direction. The first holding portion includes a first holding member and a second holding member that sandwich the one side portion, and the second holding portion includes a third holding member and a fourth holding member that sandwich the other side portion.

16. The manufacturing device for a winding connection portion cover according to any one of claims 1 to 10, characterized in that: The manufacturing device includes a storage device including a storage portion that stores the first cylindrical member and the second cylindrical member.

17. The manufacturing device of the winding connection portion cover according to claim 16, characterized in that: The storage device includes a first storage portion, a second storage portion, and a distribution member that distributes the first cylindrical member and the second cylindrical member to the first storage portion and the second storage portion, respectively.

18. The manufacturing device for a winding connection portion cover according to any one of claims 1 to 10, characterized in that: The cutting device is configured to include a blade portion having a blade extending linearly, wherein an angle formed by an extension line of the blade and an extension line of the joining portion is an acute angle when viewed in a cross section perpendicular to an extension direction of the cylindrical member.

19. A method for manufacturing a winding connection portion cover, which is used to manufacture a winding connection portion cover that covers a winding connection portion to which a plurality of stator windings are connected, characterized in that: The following steps are involved: An insulating film of a predetermined shape is wound around a winding shaft that can rotate around an axis extending in a first direction to form a cylindrical member having an inner space with both ends open; forming a joint portion at a predetermined position of the cylindrical member to divide the inner space into a first inner space and a second inner space; A predetermined portion of the joint formed on the cylindrical member is cut to divide the cylindrical member into a first cylindrical member having the first inner space and a second cylindrical member having the second inner space.

20. The method for manufacturing a winding connection portion cover according to claim 19, characterized in that: In the step of forming the cylindrical member, the insulating film is wound around a first winding axis and a second winding axis, the first winding axis being rotatable about a first axis extending in the first direction, and the second winding axis being rotatable about a second axis extending in the first direction and being arranged separately from the first winding axis along the first direction.

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