Winding connection cover manufacturing device and winding connection cover manufacturing method

Abstract

To provide a winding connection cover manufacturing device and a winding connection cover manufacturing method that can efficiently manufacture a winding connection cover.SOLUTION: One end of an insulating film 120 having a predetermined shape along the length direction is inserted into a first groove 211(1) of a first winding shaft 210(1) and a second groove 211(2) of a second winding shaft 210(2). In this state, a first winding shaft 210(1) and the second winding shaft 210(2) are rotated to form a cylindrical member 130 having an inner space 131 with both ends open. A joint is formed at a predetermined location of a cylindrical member 130 to divide the inner space 131 into a first inner space portion 131(1) and a second inner space 131(2). Then, a first neutral point cover 130(1) and a second neutral point cover 130(2) are formed by cutting the joint at a predetermined location.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a winding connection cover manufacturing apparatus and a winding connection cover manufacturing method for manufacturing a winding connection cover that covers a connection portion of a stator winding. [Background technology]

[0002] Electric motors used in electrical appliances such as air conditioners (home air conditioners, car air conditioners, etc.) and refrigerators have a winding connection part where multiple stator windings are connected. For example, when three-phase stator windings are star-connected, a neutral point is formed where one end of the stator windings of each phase is commonly connected. The other end of the stator windings of each phase is connected to each of the three-phase power supply terminals. The term "neutral point" refers to "the part where one end of the three-phase stator windings are grouped together and commonly connected." Since the neutral point is in contact with or located in close proximity to other electrical components (eg, other parts of the stator winding, the stator core, electrical equipment, etc.), it is necessary to insulate the neutral point from the other electrical components. Conventionally, a neutral point cover is used to cover the neutral point in order to insulate the neutral point from other electrical components. For example, Japanese Patent Application Laid-Open No. 2016-25796 discloses a neutral point cover made of an insulating film. This neutral point cover is formed in a cylindrical shape with an inner space with one end closed. In addition, JP 2016-25796 A discloses a method for manufacturing a neutral cover, in which an insulating film is wrapped around a cylindrical member to form the cylindrical member, and then one end of the cylindrical member is joined to manufacture the neutral cover. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-25796 A Summary of the Invention [Problem to be solved by the invention]

[0004] The neutral point cover manufacturing method disclosed in JP 2016-25796 A does not allow for efficient manufacturing of neutral point covers. An object of the present invention is to provide a winding connection cover manufacturing device and a winding connection cover manufacturing method that can efficiently manufacture a winding connection cover that covers a winding connection part to which a plurality of stator windings, such as a neutral point, are connected. [Means for solving the problem]

[0005] The first invention relates to a winding connection cover manufacturing apparatus. The first invention is composed of a winding device, a joining device, and a cutting device. The winding device includes a winding shaft rotatable about an axis extending in a first direction, and the winding device winds an insulating film of a predetermined shape around the winding shaft to form a tubular member having an interior space that is open at both ends. The joining device forms a joining portion at a predetermined location of the tubular member to divide the inner space into a first inner space and a second inner space. The cutting device cuts a predetermined portion of a joint formed on the tubular member 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. The first cylindrical member (second cylindrical member) is used as a winding connection part cover that covers the winding connection part by inserting the winding connection part into the first inner space (second inner space). According to the first aspect of the present invention, the winding connection portion cover can be manufactured efficiently. In a different embodiment of the first aspect of the invention, the winding shaft includes a first winding shaft and a second winding shaft. The first winding shaft is rotatable about a first axis extending in a first direction. The second winding shaft is rotatable about a second axis extending in the first direction. The first winding shaft and the second winding shaft are arranged such that a first tip of the first winding shaft and a second tip of the second winding shaft face each other along the first direction. In other words, the first winding shaft and the second winding shaft are arranged to be spaced apart along the first direction. The winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft. In this embodiment, the work of forming the joints and the work of cutting the joints can be performed in a state in which the insulating film is wound around the first winding shaft and the second winding shaft. In a different embodiment of the first aspect of the present invention, the first winding shaft and the second winding shaft are configured to be movable along a first direction. In this embodiment, the tubular member can be moved from the position where the winding device is disposed. In a different embodiment of the first aspect of the invention, the insulating film extends in width and length directions that intersect with each other. 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 length direction being engaged with the first winding shaft and the second winding shaft. In this embodiment, the insulating film can be reliably wound around the first winding shaft and the second winding shaft. 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 a first direction and has an opening that opens into an outer peripheral surface of the first winding shaft including a first tip. The second groove extends along the first direction and has an opening that opens into an outer peripheral surface of the second winding shaft including a second tip. 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 length direction inserted into a first groove of the first winding shaft and a second groove of the second winding shaft. In this embodiment, the insulating film can be easily and reliably wound around the first winding shaft and the second winding shaft. In a different form of the first invention, the winding device includes a guide jig that guides a portion of the insulating film at one end along its length into a first groove of the first winding shaft and a second groove of the second winding shaft. In this embodiment, the portion of the insulating film on one end side along the length direction can be easily inserted into the first groove and the second groove. In a different embodiment of the first aspect of the invention, the guiding jig includes a first guiding jig and a second guiding jig. The first guide jig has a first guide groove extending in a first direction and 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, respectively, along the second direction. 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 so that one end portion of the insulating film along its length is inserted into a first groove of a first winding shaft via a first guide groove of a first guiding tool, and is also inserted into a second groove of a second winding shaft via a second guide groove of a second guiding tool. In this embodiment, the portion of the insulating film on one end side along the length direction can be easily inserted into the first groove and the second groove. In a different embodiment of the first invention, the first winding shaft and the first guide jig are configured to be movable in a first direction in conjunction with each other, and the second winding shaft and the second guide jig are configured to be movable in a first direction in conjunction with each other. In this embodiment, the tubular member can be moved from the position where the winding device is disposed. In a different embodiment of the first aspect of the invention, the first guide groove has a first guide groove portion, and the second guide groove has a second guide groove portion. The first guide groove portion and the second guide groove portion are formed such that the spacing between them along a third direction intersecting the first direction and the second direction decreases from the first side to the second side along the second direction. It should be noted that this embodiment encompasses an embodiment including a first guide groove having only a first guide groove portion and a second guide groove having only a second guide groove portion. In this embodiment, the portion of the insulating film on one end side along the length direction can be easily inserted into the first groove and the second groove. In a different embodiment of the first aspect of the invention, the first guide groove further includes a third guide groove portion, and the second guide groove further includes a fourth guide groove portion. The third guide groove portion is disposed on the second side along the second direction relative to the first guide groove portion, and is equally spaced (including "approximately equally") apart along the third direction. The fourth guide groove portion is disposed on the second side in the second direction relative to the second guide groove portion, and is equally spaced (including "approximately equally") apart along the third direction. In this embodiment, the portion of the insulating film on one end side along the length direction can be easily and reliably inserted into the first groove and the second groove. In a different embodiment of the first aspect of the invention, the first guiding jig and the second guiding jig have a first guiding jig inner space and a second guiding jig inner space, respectively, extending along the first direction. The first guide jig inner space has an inner diameter larger than the outer diameter of the first winding spindle, and communicates with the second opening of the first guide groove. The second guide jig inner space has an inner diameter larger than the outer diameter of the second winding spindle, and communicates with the fourth opening of the second guide groove. The first winding shaft is inserted into the first guiding jig inner space so as to be rotatable relative to the first guiding jig. The second winding shaft is inserted into the second guiding jig inner space so as to be rotatable relative to the second guiding jig. In this embodiment, the insulating film can be easily and reliably wound around the first winding shaft and the second winding shaft. In another 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 one end portion of the insulating film 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 faces the second opening of the first guide groove, and to adjust the rotational position of the second winding shaft so that the opening of the second groove faces the fourth opening of the second guide groove. In this embodiment, the portion of the insulating film on one end side along the length direction can be reliably inserted into the first groove and the second groove. In a different embodiment of the first invention, the outer circumferential surface of the first tip end of the first winding shaft is formed so that the outer diameter increases from the second side to the first side along the first direction, and the outer circumferential surface of the second tip end of the second winding shaft is formed so that the outer diameter increases from the first side to the second side along the first direction. In this embodiment, the first tip end of the first winding shaft and the second tip end of the second winding shaft can be easily removed from the inner space of the cylindrical member. In another embodiment of the first aspect of the present invention, a holding device is provided for holding the tubular member on which the joint is formed. In this embodiment, the tubular member on which the joint is formed can be moved. In a different aspect of the first aspect of the invention, the holding device includes a first holding portion and a second holding portion. The first holding portion has a first holding member and a second holding member that sandwich a portion on one side of the joint along the extending direction of the tubular member. The second holding portion has a third holding member and a fourth holding member that sandwich a portion on the other side of the joint along the extending direction of the tubular member. In this embodiment, the joint can be cut at a predetermined location while the tubular member is being held. In another embodiment of the first aspect of the present invention, a storage device including a storage section that stores a first tubular member and a second tubular member is provided. In this embodiment, the first tubular member and the second tubular member can be housed. In another embodiment of the first aspect of the present invention, the storage device includes a first storage section, a second storage section, and a sorting member. The sorting member is configured to sort the first and second cylindrical members into the first and second storage sections, respectively. In this embodiment, the first tubular member and the second tubular member can be housed separately. In another embodiment of the first aspect of the invention, the cutting device has a blade portion having a blade extending linearly, and is configured such that an angle formed by an extension line of the blade and an extension line of the joint is an acute angle when viewed in a cross section perpendicular (including "approximately perpendicular") to the extension direction of the tubular member. In this embodiment, it is possible to prevent occurrence of cutting defects, cutting burrs, and the like. The second invention relates to a method for manufacturing a winding connection cover. The second invention comprises first to third steps. In a first step, an insulating film having a predetermined shape is wound around a winding shaft that is rotatable about an axis extending in a first direction to form a tubular member having an interior space that is open at both ends. In the second step, a joint is formed at a predetermined location of the tubular member to divide the inner space into a first inner space and a second inner space. In a third step, a predetermined location 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. According to the second aspect of the present invention, the winding connection portion cover can be manufactured efficiently. A different aspect of the second invention is that in a first step, the insulating film is wound around a first winding shaft rotatable about a first axis extending in a first direction and a second winding shaft rotatable about a second axis extending in the first direction and positioned spaced apart from the first winding shaft along the first direction. In this embodiment, the work of forming the joints and the work of cutting the joints can be performed in a state in which the insulating film is wound around the first winding shaft and the second winding shaft. Effect of the Invention

[0006] By using the winding connection cover manufacturing apparatus and winding connection cover manufacturing method of the present invention, winding connection covers can be manufactured efficiently. [Brief description of the drawings]

[0007] [Figure 1] 2 is a block diagram showing a schematic configuration of a neutral point cover manufacturing apparatus. FIG. [Diagram 2] 1 is a flowchart showing an outline of a method for manufacturing a neutral point cover. [Figure 3A] 10 is a flowchart showing an example of a method for supplying an insulating film having a predetermined shape. [Figure 3B] 10 is a flowchart showing another example of a method for supplying an insulating film having a predetermined shape. [Figure 4A] 5A to 5C are diagrams illustrating an outline of the operation of the insulating film supplying device. [Figure 4B] 4A to 4C are diagrams illustrating the general operation of the winding device. [Figure 5A] 1A to 1C are diagrams illustrating an outline of the operation of the joining device. [Figure 5B] 10A to 10C are diagrams illustrating the general operation of the holding device. [Figure 6A] 5A to 5C are diagrams illustrating the general operation of the cutting device. [Figure 6B] 10A to 10C are diagrams illustrating the general operation of the storage device. [Figure 7] FIG. 2 is a diagram showing a winding device constituting a first embodiment of a neutral point cover manufacturing device. [Figure 8] FIG. 8 is a diagram showing an assembled state of a winding shaft and a guide jig that constitute the winding device shown in FIG. [Figure 9] 8 as viewed in the direction of arrow IX. [Figure 10] 4A to 4C are diagrams illustrating the operation of a winding device constituting the first embodiment of the neutral point cover manufacturing device. [Figure 11] FIG. 2 is a diagram showing a joining device constituting a first embodiment of a neutral point cover manufacturing device. [Figure 12] FIG. 2 is a diagram showing a holding device constituting a first embodiment of a neutral point cover manufacturing apparatus. [Figure 13A] FIG. 2 is a diagram showing a cutting device constituting a first embodiment of a neutral point cover manufacturing device. [Figure 13B] 13B is a cross-sectional view taken along the direction of arrows XIII-XIII in FIG. 13A. [Figure 14] FIG. 2 is a diagram showing a containing device constituting a first embodiment of a neutral point cover manufacturing device. [Figure 15] FIG. 13 is a diagram showing a winding device constituting a second embodiment of the neutral point cover manufacturing device. [Figure 16] FIG. 16 is a diagram showing an assembled state of a winding shaft and a guide jig that constitute the winding device shown in FIG. [Figure 17] FIG. 17 is a view taken in the direction of arrows XVII-XVII in FIG. [Figure 18] 13A to 13C are diagrams illustrating the operation of a winding device constituting a second embodiment of a neutral point cover manufacturing device. [Figure 19A] FIG. 13 is a diagram showing a cutting device constituting a second embodiment of the neutral point cover manufacturing device. [Figure 19B] 19B is a cross-sectional view taken along the direction of arrows XIX-XIX in FIG. 19A. [Figure 20] FIG. 13 is a diagram showing a containing device constituting a second embodiment of the neutral point cover manufacturing device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a winding connection cover manufacturing apparatus and a winding connection cover manufacturing method of the present invention will be described with reference to the drawings. The following describes a neutral point cover manufacturing device and a neutral point cover manufacturing method for manufacturing a neutral point cover that covers a neutral point formed by commonly connecting one end of a three-phase stator winding of a motor. 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. The Y direction perpendicular to the X direction (including "approximately perpendicular") 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. The Z direction perpendicular to the X direction and the Y direction (including "approximately perpendicular") 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. In the following, a case will be described in which the X direction and the Y direction are set to extend horizontally, and the Z direction is set to extend vertically.

[0009] FIG. 1 is a block diagram showing a schematic configuration of a neutral point cover manufacturing apparatus 10. As shown in FIG. The neutral point cover manufacturing apparatus 10 is composed of an insulating film supplying device 100, a winding device 200, a joining device 300, a holding device 400, a cutting device 500, a storage device 600, and a control device 700. The winding device 200, the joining device 300, the cutting device 500, and the storage device 600 are each disposed at different positions along a first direction (X direction). The insulating film supplying device 100 supplies the insulating film to the winding device 200 . The winding device 200 winds the insulating film to form a tubular member having an interior space that is open at both ends. The joining device 300 joins predetermined portions of the tubular members to divide the inner space into a first inner space and a second inner space. The holding device 400 holds a tubular member. The holding device 400 includes a holding portion that holds the tubular member, and a moving device that moves the holding portion along the second direction. The cutting device 500 cuts a predetermined portion of the joint of the tubular member to separate it into a first tubular member having a first inner space and a second tubular member having a second inner space. The storage device 600 stores the first tubular member and the second tubular member in a storage portion. The control device 700 controls the operation of each device. 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. The winding device 200, the joining device 300, the cutting device 500, and the containing device 600 are disposed at a first position, a second position, and a third position along the second direction (Y direction).

[0010] The method for manufacturing the neutral point cover will be outlined with reference to FIGS. FIG. 2 is a flow chart for explaining a method for manufacturing a neutral point cover, and FIGS. 3A and 3B are flow charts for explaining an embodiment of a method for supplying an insulating film. FIG. 4A is a diagram for explaining the general operation of an insulating film supplying device 100. FIG. 4B is a diagram for explaining the general operation of a winding device 200. FIG. 5A is a diagram for explaining the general operation of a joining device 300. FIG. 5B is a diagram for explaining the general operation of a holding device 400. FIG. 6A is a diagram for explaining the general operation of a cutting device 500. FIG. 6B is a diagram showing the general configuration of a storage device 600.

[0011] In step A1, a winding device 200 winds an insulating film of a predetermined shape to form a tubular member 130 having an inner space 131 that is open at both ends.

[0012] FIG. 4A shows a winding device 200 including a first winding shaft 210(1) and a second winding shaft 210(2). The first winding shaft 210(1) is configured to be rotatable about a first axis P extending along a first direction (X direction) and to be movable along the extension direction of the first axis P. The first winding shaft 210(1) also has a first groove 211(1) and a first tip portion 212(1). The first groove 211(1) opens into the outer circumferential surface of the first winding shaft 210(1) including the first tip portion 212(1). 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. The second winding shaft 210(2) also has a second groove 211(2) and a second tip portion 212(2). The second groove 211(2) opens to the outer circumferential surface of the second winding shaft 210(2) including the second tip portion 212(2). The first winding shaft 210(1) and the second winding shaft 210(2) are disposed apart from each other along the first direction.

[0013] When forming a tubular member, the first winding shaft 210(1) and the second winding shaft 210(2) are positioned at a winding position where the distance between the first tip portion 212(1) and the second tip portion 212(2) is short. In this state, insulating film 120 having a predetermined shape is supplied from insulating film supplying device 100 to wrapping device 200 . As the insulating film, a known insulating film, for example, a polyester film, etc., is used. In FIG. 4A, insulating film 120 of a predetermined shape (hereinafter referred to as "insulating film 120") has a width along the width direction (F direction) of M mm, a length along the length direction (G direction) perpendicular to the width direction (including "approximately perpendicular") of N mm, and is formed into a rectangular shape having edges 120a to 120d. One end side (edge ​​portion 120a side) of the insulating film 120 in the longitudinal direction is secured to the first winding shaft 210(1) and the second winding shaft 210(2). In FIG. 4B, 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).

[0014] In this state, the first winding shaft 210(1) and the second winding shaft 210(2) are rotated in the same direction. This forms a cylindrical member 130 having an inner space 131 with both ends open (openings 131a, 131b).

[0015] The insulating film 120 can be supplied to the winding device 200 in a variety of ways. One example of a method for providing insulating film 120 is described with reference to the flow chart shown in FIG. 3A. In step B1, one end portion along the length direction of the long insulating film is engaged with the first winding shaft 210(1) and the second winding shaft 210(2). For example, one end portion along the length direction (the edge portion 110a side) of the long insulating film 110 (hereinafter referred to as "insulating film 110") with a width of M mm that is wound in a roll 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). In step B2, the insulating film 110 is cut at a location a set length N mm from the edge 110a.

[0016] Another example of a method for providing insulating film 120 is described with reference to the flow chart shown in FIG. 3B. In step C1, insulating film 110 having a width of M mm is cut at a location having a set length N mm from one end (edge ​​110a) along the length direction. In step C2, one end side (edge ​​120a side) along the length of insulating film 120 cut to a set length is inserted into first groove 211(1) of first winding shaft 210(1) and second groove 211(2) of second winding shaft 210(2).

[0017] Next, in step A2, the joining device 300 joins predetermined portions of the tubular member 130 to divide the inner space 131 into a first inner space 131(1) and a second inner space 131(2). In FIG. 5A, a portion of the cylindrical member 130 between the first winding shaft 210(1) and the second winding shaft 210(2) is set as the predetermined portion. A known joining device can be used as the joining device 300. For example, an ultrasonic welding machine is used. The ultrasonic welding machine includes an ultrasonic welding vibrator 310(1) and a receiving stand 310(2) that are arranged at positions facing each other across the tubular 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 the ultrasonic vibrations. The joining device 300 moves the ultrasonic welding vibrator 310(1) and the receiving stand 310(2) toward the tubular member 130 along the third direction, and applies pressure and ultrasonic vibrations to a predetermined location of the tubular member 130. As a result, a joint 140 is formed at a predetermined location of the tubular member 130. That is, the inner space 131 of the tubular member 130 is divided into a first inner space 131(1) and a second inner space 131(2). The first inner space 131(1) has one end closed by the joint 140 and the other end open (opening 131a). The second inner space 131(2) has one end open (opening 131b) and the other end closed by the joint 140.

[0018] 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. In FIG. 5B, the holding device 400 holds the tubular member 130 in order to move the tubular member 130 along the second direction to a second position where the cutting device 500 is disposed. The holding device 400 includes a first holding portion 410(1) and a second holding portion 410(2). The first holding portion 410(1) has a first holding member 420(1) and a second holding member 430(1) that hold a portion of the tubular member 130 on the second side of the joint portion 140 along the extension direction (R direction). The second holding portion 410(2) has a third holding member 420(2) and a fourth holding member 430(2) that hold a portion of the tubular member 130 on the first side of the joint portion 140 along the extension direction (R direction). After the holding device 400 holds the tubular member 130, the first winding shaft 210(1) and the second winding shaft 210(2) are moved to a standby position where the distance between the first tip portion 212(1) and the second tip portion 212(2) is large. As a result, the first tip portion 212(1) and the second tip portion 212(2) come out of the first inner space 131(1) and the second inner space 131(2) of the tubular member 130. Here, the outer circumferential surfaces of the first tip portion 212(1) and the second tip portion 212(2) are formed so that the outer diameter decreases toward the tip, which makes it possible to easily remove the first tip portion 212(1) and the second tip portion 212(2) from the first inner space 131(1) and the second inner space 131(2).

[0019] Then, a predetermined portion of the joint portion 140 of the tubular member 130 that has been moved to the second position is cut by the cutting device 500. 6A, the cutting device 500 includes a blade portion 510 having a linearly extending blade 511. The joint portion 140 of the tubular member 130 is cut in a second direction by the blade 511. As a result, the tubular member 130 is divided into a first tubular member 130(1) having a first inner space 131(1) and a second tubular member 130(2) having a second inner space 131(2).

[0020] Next, in step A4, the storage device 600 stores the first cylindrical member 130(1) and the second cylindrical member 130(2). When storing the first tubular member 130(1) and the second tubular member 130(2), the first tubular member 130(1) and the second tubular member 130(2) are moved along the second direction to a third position where the storage device 600 is disposed. In FIG. 6B, the storage device 600 includes a storage portion 610 that stores a first tubular member 130(1) and a second tubular member 130(2). 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 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 (drop) to the first side along the third direction and are housed in the housing section 610.

[0021] A first embodiment of a neutral point cover manufacturing apparatus 10 will be described with reference to FIGS. First, the winding device 200 will be described with reference to FIGS. Fig. 7 is a diagram showing the winding device 200. Fig. 8 is a diagram showing an assembled state of a first winding shaft 230(1) and a first guiding jig 240(1) which constitute the winding device 200. Fig. 9 is a diagram seen from the direction of an arrow IX in Fig. 8. Fig. 10 is a diagram for explaining the operation of the winding device 200.

[0022] The winding device 200 includes a first winding shaft 230(1), a second winding shaft 230(2), a first guiding jig 240(1) and a second guiding jig 240(2).

[0023] 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. The first winding shaft 230(1) has a first groove 231(1) and a first tip portion 232(1). The first groove 231(1) extends along the extension direction of the first axis P and has an opening that opens into the outer circumferential surface of the first winding shaft 230(1) including the first tip portion 232(1). The outer circumferential surface of the first tip portion 232(1) is formed so that the outer diameter becomes smaller toward the tip (from the second side toward the first side along the first direction). 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. The second winding shaft 230(2) has a second groove 231(2) and a second tip portion 232(2). The second groove 231(2) extends along the extension direction of the second axis Q and has an opening that opens into the outer circumferential surface of the second winding shaft 230(2) including the second tip portion 232(2). The outer circumferential surface of the second tip portion 232(2) is formed so that the outer diameter decreases toward the tip (from the first side toward the second side along the first direction). The direction in which the second axis Q extends is set to coincide with the direction in which the first axis P extends (including "approximately coincident"). The first winding shaft 230(1) and the second winding shaft 230(2) are disposed apart from each other in the first direction with the first tip portion 232(1) and the second tip portion 232(2) facing each other. 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 shaft 230(1) and the second winding shaft 230(2) with the portion of the insulating film 120 on the edge 120a side inserted therein. In this embodiment, the first groove 231(1) (second groove 231(2)) has two openings on the outer peripheral surface of the first winding shaft 230(1) (second winding shaft 230(2)) (see FIG. 9 ), but may have only one opening.

[0024] The first guiding jig 240(1) has a first guiding jig inner space 242(1) and a first guide groove 245(1). The first guide jig inner space 242(1) is formed by a first inner circumferential 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). 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 with the first winding shaft 230(1) inserted into the first guide jig inner space 242(1). The first guide groove 245(1) is formed by a first wall surface 243(1) and a second wall surface 244(1), and extends in a first direction (X direction) and a 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 a first side (Y1 side) and a second side (Y2 side) along the second direction, respectively. That is, the first guide jig inner space 242(1) communicates with the first guide groove 245(1) via the second opening 245(1)B. The first wall surface 243(1) includes a first wall surface portion 243a(1) and a third wall surface portion 243b(1) disposed on the second side (Y2) side in the second direction from the first wall surface portion 243a(1). The second wall surface 244(1) includes a second wall surface portion 244a(1) and a fourth wall surface portion 244b(1) disposed on the second side (Y2 side) in the second direction from the third wall surface portion 244a(1). As a result, first guide groove 245(1) includes a first guide groove portion formed by first wall surface portion 243a(1) and second wall surface portion 244a(1), and a second guide groove portion formed by second wall surface portion 243b(1) and fourth wall surface portion 244b(1). The first guide groove portions are formed such that the intervals along the third direction (Z direction) become shorter from the first side (Y1 side) to the second side along the second direction. The second guide groove portions are disposed on the second side along the second direction from the first guide groove portions, and are formed such that the intervals along the third direction are equal ("approximately equal").

[0025] The second guide jig 240(2), like the first guide jig 240(1), has a second guide jig inner space 242(1) formed by a second inner 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). The third wall surface 243(2), like the first wall surface 243(1), includes a fifth wall surface portion 243a(2) and a sixth wall surface portion 243b(2). The fourth wall surface 244(2), like the second wall surface 244(1), includes a seventh wall surface portion 244a(2) and an eighth wall surface portion 244b(2). The second guide groove 245(2), like the first guide groove 245(1), includes a third guide groove portion and a fourth guide groove portion that is disposed on the second side of the third guide groove portion in the second direction.

[0026] In this embodiment, the first winding spindle 230(1) and the first guiding jig 240(1) are configured to be movable in a first direction in conjunction with each other, and the second winding spindle 230(2) and the second guiding jig 240(2) are configured to be movable in a first direction in conjunction with each other. For example, a first support member (not shown) and a second support member (not shown) that are movable along a first direction are provided on a base (not shown) of the neutral point cover manufacturing apparatus 10. A first guide jig 240(1) is attached to the first support member, and a second guide jig 240(2) is attached to the second support member. In addition, a first winding shaft 230(1) and a second winding shaft 230(2) are rotatably attached to the base.

[0027] In this embodiment, the winding device 200 is set to a winding mode and a standby mode. In the winding mode, the distance between the first tip portion 232(1) and the second tip portion 232(2) is set short. Specifically, the first winding shaft 230(1) and the first guiding jig 240(1) move to the first side (X1 side) along the first direction, and the second winding shaft 230(2) and the second guiding jig 240(1) move to the second side (X2 side) along the first direction. In the standby mode, the distance between the first tip portion 232(1) and the second tip portion 232(2) is set to be long. Specifically, the first winding shaft 230(1) and the first guiding jig 240(1) move to the second side (X2 side) along the first direction, and the second winding shaft 230(2) and the second guiding jig 240(1) move to the first side (X1 side) along the first direction.

[0028] The operation of the winding device 200 of this embodiment will be described below. When the insulating film 120 is wound by the winding device 200, the winding device 200 is set to a winding mode. When winding insulating film 120, the opening of first groove 231(1) of first winding shaft 230(1) needs to face second opening 245(1)B of first guide groove 245(1) of first guiding jig 240(1), and the opening of second groove 231(2) of second winding shaft 230(2) needs to face fourth opening 245(2)B of second guide groove 245(2) of second guiding jig 240(2). For this reason, the winding device 200 includes a rotational position adjustment device (not shown) that adjusts the rotational positions of the first winding shaft 230(1) and the second winding shaft 230(2). As the rotational position adjustment device, a known rotational position adjustment device can be used. In addition, when first groove 231(1) (second groove 231(2)) has two openings, one of the openings of first groove 231(1) (second groove 231(2)) is adjusted to face second opening 245(1)B of first guide groove 245(1) (fourth opening 245(2)B of second guide groove 245(2)).

[0029] The portion of insulating film 120 on the side of edge 120a is inserted into first groove 231(1) of first winding shaft 230(1) and second groove 231(2) of second winding shaft 230(2) via first guide groove 245(1) of first guiding jig 240(1) and second guide groove 245(2) of second guiding jig 240(2). In this embodiment, the intervals 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) are set long. This allows the edge 120a of the insulating film 120 to be easily inserted into the first guide groove 245(1) and the second guide groove 245(2). Additionally, the first guide groove 245(1) and the second guide groove 245(2) include second guide groove portions 245b(1) and 245b(2) that are equally spaced apart along the third direction on the second side (Y2 side) along the second direction, which allows the edge portion 120a of the insulating film 120 to be reliably 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).

[0030] With the portion of insulating film 120 on the edge 120a side inserted into first groove 231(1) and second groove 232(2), first winding shaft 210(1) and second winding shaft 210(2) are rotated in the same rotational direction (the direction of arrow R1 in FIG. 10). As a result, the insulating film 120 is wound around the first winding shaft 230(1) and the second winding shaft 230(2) within the first guide jig inner space 242(1) and the second guide jig inner space 242(2) to form the tubular member 130. As shown in FIG. 10, the cylindrical member 130 has a length of M mm along the extending direction R, and both ends are open (openings 131a, 131b). When the winding of the insulating film 120 is completed, the winding device 200 is set to a standby mode. In this embodiment, the winding device 200 is set to the standby mode after the joining device 300 forms the joint portion 140, as described below.

[0031] Next, the joining device 300 will be described with reference to FIG. In this embodiment, an ultrasonic welding machine including an ultrasonic welding vibrator 320(1) and a receiving stand 320(2) is used as the bonding device 300. The ultrasonic welding vibrator 320(1) and the receiving stand 320(2) are arranged to be movable along the third direction on the second side (Z2 side) and the first side (Z1 side), respectively. A plurality of ribs are formed on mutually opposing surfaces of the ultrasonic welding vibrator 320(1) and the receiving stand 320(2). Although not shown, the ultrasonic welding machine also includes a pressure device that presses the ultrasonic welding transducer 320(1) toward the first side (Z1 side) along the third direction. In this embodiment, the cylindrical member 130 is joined in a state in which the first tip 231(1) of the first winding shaft 230(1) and the second tip 231(2) of the second winding shaft 230(2) are inserted into both ends of the inner space 131 of the cylindrical member 130. For this reason, the ultrasonic welding vibrator 320(1) and the receiving stand 320(2) are disposed between the first tip 231(1) and the second tip 231(2) disposed at the winding position. The bonding device 300 is set to a bonding mode and a standby mode. In the bonding mode, pressure is applied by the ultrasonic welding transducer 320(1) and the receiving stand 320(2). Specifically, the ultrasonic welding transducer 320(1) moves to the first side along the third direction, and the receiving stand 320(2) moves to the second side along the third direction. In the standby mode, the ultrasonic welding transducer 320(1) and the receiving stand 320(2) are released from pressing the tubular member 130. Specifically, the ultrasonic welding transducer 320(1) moves to the second side along the third direction, and the receiving stand 320(2) moves to the first side along the third direction. The joining device 300 forms a joint 140 at a predetermined location on the tubular member 130. The joint 140 has joint surfaces 141 and 142 extending in the first and second directions on either side along the third direction. The joint surfaces 141 and 142 extend parallel to each other (including "approximately parallel"). 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. The first inner space 131(1) has one end closed by the joint 140 and the other end open (opening 131a). The second inner space 131(2) has one end open (opening 131b) and the other end closed by the joint 140.

[0032] Next, the holding device 400 will be described with reference to FIG. Here, when the bonding device 300 is set to the bonding mode, the tubular member 130 (insulating film 120) is pressurized by the ultrasonic welding vibrator 310(1) and the receiving stand 310(2). That is, the tubular member 130 is sandwiched between the ultrasonic welding vibrator 310(1) and the receiving stand 310(2). In this embodiment, in this state, the winding device 200 is set to a standby mode. The outer circumferential surfaces of the first tip portion 232(1) and the second tip portion 232(2) are formed so that the outer diameter decreases toward the tip. Therefore, when the winding device 200 is set to the standby mode, the first tip portion 232(1) and the second tip portion 232(2) can easily come out of the first inner space 131(1) and the second inner space 131(2) of the tubular member 130. Then, with the cylindrical member 130 being held by the holding device 400, the joining device 300 is set to a standby mode.

[0033] The holding device 400 includes a first holding portion 440(1) and a second holding portion 440(2) that are spaced apart from each other along a first direction. In this embodiment, as described below, the joint portion 140 is cut by the cutting device 500. For this reason, the first holding portion 440(1) and the second holding portion 440(2) are configured to hold both sides of the joint portion 140 along the extension direction (R direction) of the tubular member 130.

[0034] The first holding portion 440(1) includes a first holding member 450(1) and a second holding member 460(1) that hold the tubular member 130 therebetween. The first holding member 450(1) has an end surface 451(1) on the side facing the second holding member 460(1). The second holding member 460(1) has an end surface 461(1) on the side facing the first holding member 450(1). A recess 463(1) is formed in the end surface 461(1) by a notched surface 462(1). The recess 463(1) is recessed on the side opposite to the side facing the first holding member 450(1). The recess 463(1) is formed in a shape that allows the tubular member 130 to be inserted therein. The cylindrical member 130 is sandwiched between an end surface 451(1) of the first holding member 450(1) and a notched surface 462(1) of the second holding member 460(1). In this embodiment, the movement of the cylindrical member 130 along the second direction and the third direction is restricted. 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) similar to the first holding member 450(1). The fourth holding member 460(2) has an end surface 461(2), a notched surface 462(2), and a recess 463(2) similar to the second holding member 460(1).

[0035] The holding device 400 can be set to a holding mode and a release mode. In the holding mode, the first holding portion 440(1) and the second holding portion 440(2) hold the tubular member 130. Specifically, the first holding member 450(1) and the third holding member 450(2) move to the second side along the third direction, and the second holding member 460(1) and the fourth holding member 460(2) move to the first side along the third direction. In the retention release mode, retention of tubular member 130 by first retaining portion 440(1) and second retaining portion 440(2) is released. Specifically, first retaining member 450(1) and third retaining member 450(2) move to the first side along the third direction, and second retaining member 460(1) and fourth retaining member 460(2) move to the second side along the third direction. In this embodiment, the holding device 400 includes a moving device (not shown) that moves the first holding unit 440(1) and the second holding unit 440(2) along the first direction. A known moving device can be used as the moving device. The moving device can move the first holding unit 440(1) and the second holding unit 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 containing device 600 is arranged.

[0036] Next, the cutting device 500 will be described with reference to Figures 13A and 13B. Figure 13A is a perspective view of the cutting device 500. Figure 13B is a cross-sectional view of Figure 13A as viewed from the direction of arrows XIII-XIII. The cutting device 500 includes a blade unit 520 and a mounting table 530 . The blade portion 520 has a blade 521 that extends linearly. The blade portion 520 is disposed so that the blade 521 extends in a direction intersecting the extension direction (R direction) of the cylindrical member 130. In this embodiment, the blade portion 520 is disposed so that the blade 521 extends along the second direction. The mounting base 530 has an end surface 531 on the side facing the blade portion 520. A recess 533 is formed in the end surface 531. The recess 533 is formed by a notched surface 532, and extends along the first direction. The recess 533 is formed so as to be able to accommodate the cylindrical member 130 in a state in which movement along the second direction is restricted. Further, in the end face 531, a hole 534 extending in the second direction (Y direction) and the third direction (Z direction) is formed at an intermediate position of the concave portion 533 along the first direction (X direction). The hole 534 is formed such that the blade 521 can be inserted. Specifically, the hole 534 is set such that the width along the first direction is longer than the width of the blade 521, and the length along the second direction (Y direction) is longer than the length of the blade 521. Also, the depth of the hole 534 along the third direction (Z direction) is set to a length capable of cutting the joint portion 140 of the cylindrical member 130 inserted into the concave portion 533 by moving the blade 521 along the third direction within the hole 534. In the present embodiment, the hole 534 penetrates the mounting table 530.

[0037] In the present embodiment, as shown in FIG. 13B, the angle H formed by the extension line 140a of the joint portion 140 of the cylindrical member 130 inserted into the concave portion 533 and the extension line 521a of the blade 521 is configured to be an acute angle. Preferably, the angle H is set to be greater than 0 degrees and 45 degrees or less (satisfying [0 degrees < H ≤ 45 degrees]). FIG. 13B shows a cross section of the joint portion 140 orthogonal (including "substantially orthogonal") to the extension direction (R direction) of the cylindrical member 130. The extension line 140a of the joint portion 140 is the extension line of the joint surface 141 or 142. When the blade 521 is brought into contact with the joint portion 140 perpendicularly, there is a risk of occurrence of cutting defects, cutting burrs, etc. If the neutral point is covered by a cylindrical member with cutting defects, cutting burrs, etc., there is a possibility of occurrence of insulation failure. In the present embodiment, since the blade 521 is brought into contact with the joint portion 140 obliquely, it is possible to prevent the occurrence of cutting defects, cutting burrs, etc. Thereby, it is possible to prevent the occurrence of insulation failure due to cutting defects, cutting burrs, etc.

[0038] The operation of the cutting device 500 will be described below. 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 50 is disposed. Then, the cutting device 500 is set to the cutting mode. When the cutting device 500 is set to the cutting mode, first, the blade portion 520 and the mounting table 530 are moved in a direction approaching each other along the third direction. Specifically, the blade portion 520 moves to the first side along the third direction, and the mounting table 530 moves to the second side along the third direction. The mounting table 530 moves to the second side along the third direction, so that the tubular member 130 is inserted into the recess 533 of the mounting table 530. Then, the blade portion 520 moves to the first side along the third direction, so that a predetermined portion of the joint portion 140 of the tubular member 130 inserted into the recess 533 of the mounting table 530 is cut. As a result, the joint portion 140 is divided into a first joint portion 140(1) and a second joint portion 140(2). That is, the tubular member 130 is divided into a first tubular member 130(1) having a first inner space 131(1) and a second tubular member 130(2) having a second inner space 131(2) (see FIG. 14). After cutting the predetermined portion of joint 140 of tubular member 130, blade portion 520 and mounting table 530 are moved in directions away from each other. Specifically, blade portion 520 moves to the second side along the third direction, and mounting table 530 moves to the first side along the third direction. Any appropriate method can be used to set the timing for switching the movement direction along the third direction of the blade portion 520 and the mounting table 530. For example, the movement direction is switched based on the positions of the blade portion 520 (blade 521) and the mounting table 530 along the third direction.

[0039] Next, the storage device 600 will be described with reference to FIG. In this embodiment, the storage device 600 includes a first storage section 620 ( 1 ), a second storage section 620 ( 8 ) and a sorting member 630 . When the first holding portion 440(1) and the second holding portion 440(2) are moved to the third position, the first accommodating portion 620(1) and the second accommodating portion 620(2) are arranged side by side in the first direction, on the first side (below) along the third direction, of the first tubular member 130(1) and the second tubular member 130(2) held by the first holding portion 440(1) and the second holding portion 440(2). In addition, the sorting member 630 is disposed between the first storage section 620(1) and the second storage section 620(2) and on the second side (upper) in the third direction from the first storage section 620(1) and the second storage section 620(2). In addition, the sorting member 630 is configured so that when the first tubular member 130(1) and the second tubular member 130(2) held by the first holding portion 440(1) and the second holding portion 440(2) move (fall) to the first side (downward) along the third direction, the portion of the first tubular member 130(1) on the side of the first joint 140(1) and the portion of the second tubular member 130(2) on the side of the second joint 140(2) come into contact with each other.

[0040] The operation of the storage device 600 is as follows. 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 to the third position, and then 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 (drop) to the first side along the third direction. At this time, the first cylindrical member 130(1) moves (drops) to the first storage portion 620(1) side as the portion on the first joint portion 140(1) side abuts against the sorting member 630. Furthermore, the second cylindrical member 130(2) moves (drops) toward the second storage section 620(2) as the portion on the second joint section 140(2) side comes into contact with the sorting member 630.

[0041] In this embodiment, the first tubular member 130(1) and the second tubular member 130(2) can be housed in separate housing portions 620(1) and second housing portions 620(2). Here, the winding direction of the insulating film 120 differs 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) as viewed from the opening 131a side differs from the winding direction of the second cylindrical member 130(2) as viewed from the opening 131b side. In this embodiment, the appropriate neutral cover can be selected based on the winding direction.

[0042] Next, a second embodiment of the neutral point cover manufacturing apparatus 10 will be described with reference to FIGS. The neutral point cover manufacturing apparatus 10 of the second embodiment is composed of a winding device 200, a joining device 300, a holding device 400, a cutting device 500, and a containing device 600. In this embodiment, the same joining device as the joining device 300 in the first embodiment is used. The following describes the differences from the first embodiment.

[0043] A winding device 200 of the present embodiment will be described with reference to FIGS. Fig. 15 is a diagram showing the winding device 200. Fig. 16 is a diagram showing an assembled state of a first winding shaft 250(1) and a first guiding jig 260(1) which constitute the winding device 200. Fig. 17 is a view of Fig. 16 as seen from the direction of arrow XVII. Fig. 18 is a diagram for explaining the operation of the winding device 200. The winding device 200 of this embodiment includes a first winding shaft 250(1), a second winding shaft 250(2), a first guiding tool 260(1) and a second guiding tool 260(2). The winding device 200 of this embodiment differs from the winding device 200 of the first embodiment in the guide groove of the guide jig. The first guide groove 265(1) of the first guiding jig 260(1) is formed by a first wall surface 263(1) and a second wall surface 264(1). Moreover, the second guide groove 265(2) of the second guiding jig 260(2) is formed by a third wall surface 263(2) and a fourth wall surface 264(2). The first guide groove 265(1) and the second guide groove 265(2) are formed such that the distance between them along the third direction becomes smaller from the first side to the second side along the second direction. In this 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. Also, 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.

[0044] The holding device 400 of this embodiment will be described with reference to FIG. 19A. In the holding device 400 of this embodiment, a first holding portion 470(1) and a second holding portion 470(2) are different from the first holding portion 440(1) and the second holding portion 440(2) of the first embodiment. The first holding portion 470(1) has a first holding member 480(1) and a second holding member 490(1). Moreover, the second holding portion 470(2) has a third holding member 480(2) and a fourth holding member 490(2). The first holding portion 470(1) holds the tubular member 130 between an end surface 481(1) of the first holding member 480(1) and an end surface 491(1) of the second holding member 490(1). The second holding portion 470(2) holds the tubular member 130 between an end surface 481(2) of the third holding member 480(2) and an end surface 491(2) of the fourth holding member 490(2).

[0045] The cutting device 500 of the present embodiment will be described with reference to FIGS. 19A and 19B. FIG. 19A is a perspective view of the cutting device 500. FIG. 19B is a cross-sectional view of FIG. 19A as viewed from the direction of arrow XIX-XIX. The cutting device 500 of the present embodiment includes a blade portion 540. The blade portion 540 has a blade 541 that extends linearly. Also in the present embodiment, when viewed 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 extending line 140a of the joint portion 140 of the cylindrical member 130 held by the first holding portion 470(1) and the second holding portion 470(2) and the extending line 541a of the blade 541 is configured to be an acute angle. Preferably, the angle H is set to be greater than 0 degrees and 45 degrees or less (so as to satisfy [0 degrees < H ≤ 45 degrees]).

[0046] The housing device 600 of the present embodiment will be described with reference to FIG. 20. In the present embodiment, the housing device 600 includes a common housing portion 640. The housing portion 640 is disposed at a position on the first side along the third direction from the first cylindrical member 130(1) and the second cylindrical member 130(2) held by the first holding portion 470(1) and the second holding portion 470(2) in a state where the first holding portion 470(1) and the second holding portion 470(2) have moved to the third position. In the present embodiment, the first cylindrical member 130(1) and the second cylindrical member 130(2) are housed in the common housing portion 440.

[0047] The present invention can also be configured as follows. (Aspect 1) A winding connection portion cover manufacturing device for manufacturing a winding connection portion cover that covers a winding connection portion to which a plurality of stator windings are connected, including a winding shaft rotatable about an axis extending in a first direction, and a winding device that winds an insulating film having a predetermined shape around the winding shaft to form a cylindrical member having an inner space with both ends open. a joining device that forms a joining portion at a predetermined location of the tubular member to divide the inner space into a first inner space and a second inner space; a cutting device that cuts a predetermined portion of the joint formed on the tubular member to divide the tubular member into a first tubular member and a second tubular member; A winding connection cover comprising: (Aspect 2) The winding connection cover manufacturing apparatus of aspect 1, The winding shaft includes a first winding shaft rotatable about a first axis extending in the first direction and a second winding shaft rotatable about a second axis extending in the first direction, the first winding shaft and the second winding shaft are arranged such that a first end portion of the first winding shaft and a second end portion of the second winding shaft face each other along the first direction; The winding connection cover manufacturing apparatus, characterized in that the winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft. (Aspect 3) The winding connection portion cover manufacturing apparatus of aspect 2, The first winding shaft is configured to be movable along the first direction, The second winding shaft is configured to be movable along the first direction. (Aspect 4) The winding connection cover manufacturing apparatus according to aspect 2 or 3, The insulating film extends in a width direction and a length direction that intersect with each other, the winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft while one end portion of the insulating film along the length direction is engaged with the first winding shaft and the second winding shaft. (Aspect 5) A winding connection portion cover manufacturing apparatus according to any one of aspects 2 to 4, the first winding shaft has a first groove, the first groove extending along the first direction and having an opening opening to an outer circumferential surface of the first winding shaft including the first tip portion; the second winding shaft has a second groove, the second groove extending along the first direction and having an opening that opens to an outer circumferential surface of the second winding shaft including the second tip portion, the winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft with the one end portion of the insulating film along the length direction inserted into the first groove of the first winding shaft and the second groove of the second winding shaft. (Aspect 6) The winding connection cover manufacturing apparatus of aspect 5, the winding device includes a guiding jig that guides the one end portion of the insulating film along the longitudinal direction into the first groove of the first winding shaft and the second groove of the second winding shaft. (Aspect 7) The winding connection cover manufacturing apparatus of aspect 6, The guiding tool includes a first guiding tool and a second guiding tool, the first guiding jig has a first guide groove extending along the first direction and a second direction intersecting the first direction, the first guide groove having a first opening and a second opening on a first side and a second side, respectively, along the second direction; the second guide jig has a second guide groove extending in the first direction and the second direction, the second guide groove having 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 one end portion of the insulating film along the longitudinal direction into the first groove of the first winding shaft via the first guide groove of the first guiding jig, and to insert the one end portion of the insulating film along the longitudinal direction into the second groove of the second winding shaft via the second guide groove of the second guiding jig. (Embodiment 8) The winding connection portion cover manufacturing apparatus of embodiment 7, the first winding shaft is configured to be movable along the first direction together with the first guiding jig, The second winding shaft is configured to be movable along the first direction together with the second guide jig. (Aspect 9) The winding connection cover manufacturing apparatus of aspect 7 or 8, the first guide groove has a first guide groove portion formed such that an interval along a third direction intersecting the first direction and the second direction decreases from the first side to the second side along the second direction, a second guide groove having a second guide groove portion formed so that the spacing along the third direction decreases from the first side to the second side along the second direction, (Aspect 10) The winding connection portion cover manufacturing apparatus of aspect 9, the first guide groove has third guide groove portions that are disposed on the second side in the second direction relative to the first guide groove portions and are equidistantly spaced apart from each other in the third direction; the second guide groove has a fourth guide groove portion that is disposed on the second side in the second direction from the second guide groove portion and is equidistantly spaced along the third direction. (Aspect 11) A winding connection portion cover manufacturing apparatus according to any one of aspects 7 to 10, the first guide jig has a first guide jig inner space extending along the first direction, the first guide jig inner space having an inner diameter larger than an outer diameter of the first winding spindle and communicating 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 having an inner diameter larger than an outer diameter of the second winding spindle and communicating with the fourth opening of the second guide groove, The first winding shaft is inserted into the first guide jig inner space so as to be rotatable with respect to the first guide jig, The second winding shaft is inserted into an inner space of the second guiding jig so as to be rotatable relative to the second guiding jig. (Aspect 12) The winding connection cover manufacturing apparatus of aspect 11, the winding device is configured to adjust a rotational position of the first winding shaft so that the opening of the first groove faces the second opening of the first guide groove, and to adjust a rotational position of the second winding shaft so that the opening of the second groove faces the fourth opening of the second guide groove, when inserting the one end portion of the insulating film along the length direction into the first groove of the first winding shaft and the second groove of the second winding shaft. (Aspect 13) A winding connection portion cover manufacturing apparatus according to any one of aspects 2 to 12, an outer circumferential surface of the first tip portion of the first winding shaft is formed such that an outer diameter increases from a side of the second tip portion of the second winding shaft toward an opposite side to the second tip portion along the first direction, the outer circumferential surface of the second tip portion of the second winding shaft is formed such that an outer diameter increases along the first direction from the first tip portion side of the first winding shaft toward an opposite side to the first tip portion. (Aspect 14) A winding connection portion cover manufacturing apparatus according to any one of aspects 1 to 13, a winding connection cover manufacturing apparatus comprising: a holding device for holding the tubular member on which the joint is formed. (Aspect 15) The winding connection cover manufacturing apparatus according to aspect 14, the holding device includes a first holding portion and a second holding portion which hold a location on one side and a location on the other side of the joint along the extension direction of the tubular member, the first holding portion having a first holding member and a second holding member which clamp the location on the one side, and the second holding portion having a third holding member and a fourth holding member which clamp the location on the other side. (Aspect 16) A winding connection portion cover manufacturing apparatus according to any one of aspects 1 to 15, A winding connection portion cover manufacturing apparatus comprising: a receiving device including a receiving portion that receives the first cylindrical member and the second cylindrical member. (Aspect 17) The winding connection portion cover manufacturing apparatus of aspect 16, The winding connection portion cover manufacturing apparatus is characterized in that the accommodating device includes a first accommodating portion, a second accommodating portion, and a distribution member that distributes the first cylindrical member and the second cylindrical member to the first accommodating portion and the second accommodating portion, respectively. (Aspect 18) A winding connection portion cover manufacturing apparatus according to any one of aspects 1 to 17, The cutting device has a blade portion having a blade extending in a straight line, and is configured so that, when viewed in a cross section perpendicular to the extension direction of the tubular member, the angle formed by the extension direction of the blade and the extension direction of the joint is an acute angle. (Aspect 19) A method for manufacturing a winding connection cover for covering a winding connection part to which a plurality of stator windings are connected, comprising the steps of: A method for manufacturing a tubular member, comprising: winding an insulating film having a predetermined shape around a winding shaft that is rotatable about an axis extending in a first direction to form a tubular member having an interior space that is open at both ends; forming a joint at a predetermined location of the tubular member to divide the inner space into a first inner space and a second inner space; cutting a predetermined portion of the joint formed on the tubular member to divide the tubular member into a first tubular member and a second tubular member; A method for manufacturing a winding connection cover comprising: (Aspect 20) A method for manufacturing the winding connection cover of aspect 19, comprising the steps of: a winding connection portion cover manufacturing method, characterized in that in the step of forming the tubular member, the insulating film is wound around a first winding shaft that is rotatable about a first axis extending in the first direction and a second winding shaft that is rotatable about a second axis extending in the first direction and is positioned at a distance from the first winding shaft along the first direction.

[0048] The present invention is not limited to the configurations described in the embodiments, and various modifications, additions, and deletions are possible. Although the above has been described with reference to the case of manufacturing a neutral point cover that covers the neutral point of a three-phase stator winding, the present invention can also be used in the case of manufacturing a winding connection cover that covers a winding connection portion to which multiple stator windings are connected. As the insulating film, a known insulating film can be used. The insulating film supplying device is not limited to the insulating film supplying device described in the embodiment as long as it can supply an insulating film of a predetermined shape (width, length) to the winding device. The winding device is not limited to the winding device described in the embodiment as long as it can wind an insulating film of a predetermined shape around a winding shaft to form a tubular member having an inner space with both ends open. For example, the number of winding shafts and the number of guide jigs are not limited to "2". Also, the grooves in the winding shafts and the guide jigs may be omitted. 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 tubular member and divide the inner space of the tubular member into a first inner section and a second inner space. For example, a joining device other than an ultrasonic welder can be used. The cutting device is not limited to the cutting device described in the embodiment as long as it is capable of cutting a predetermined portion of the joint of the tubular member and dividing the tubular member into a first tubular member having a first inner space and a second tubular member having a second inner space. The storage device is not limited to the storage device described in the embodiment. In the embodiment, the winding device, joining device, cutting device and containing device are arranged at different positions (first position, second position, third position) along the first direction in consideration of interference between the devices, but if there is no need to consider interference, multiple devices can also be arranged at the same position. Furthermore, the configuration of the holding device for moving the cylindrical member to different positions is not limited to the configuration described in the embodiment, and the holding device may be omitted. Each of the configurations described in the embodiments can be used alone, or multiple appropriately selected configurations can be used in combination. [Explanation of symbols]

[0049] 10 Neutral cover manufacturing equipment (winding connection manufacturing equipment) 100 Insulating film supply device 110 Long insulating film 120 Insulating film of a specified shape 120a, 120b, 120c, 120d edges 130, 130(1), 130(2) Cylindrical member 131 Inner Space 131a, 131b opening 131(1), 131(2) Inner space 140, 140(1), 140(2) Second joint 141, 142 Joint surface 200 Winding device 210(1), 210(2), 230(1), 230(2), 250(1), 250(2) reel 211(1), 211(2), 231(1), 231(2), 251(1), 252(2) Groove 212(1), 212(2), 232(1), 232(2), 252(1), 252(2) Tip 240(1), 240(2), 260(1), 260(2) Guide fixture 241(1), 241(2), 261(1), 261(2) Inner surface 242(1), 242(2), 262(1), 262(2) Guide jig inner space 243(1), 243(2), 244(1), 244(2), 263(1), 263(2), 264(1), 264(2) Wall 243a(1), 243a(2), 243b(1), 243b(2), 244a(1), 244a(2), 244b(1), 244b(2) Wall section 245(1), 245(2), 265(1), 265(2) Guide groove 245a(1), 245a(2), 245b(1), 245b(2) Guide groove portion 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 300 Joining equipment 310(1), 320(1) Welding transducer 310(2), 320(2) Receiving stand 400 Holding device 410(1), 410(2), 440(1), 440(2), 470(1), 470(2) Holding part 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 451(1), 451(2), 461(1), 461(2), 481(1), 481(2), 491(1), 391(2) End face 462(1), 462(2) Notched surface 463(1), 463(2) Recess 500 cutting equipment 510, 520, 540 blade part 511, 521, 541 Blades 530 Placement table 531 End face 532 Notched surface 533 Recess 534 holes 600 Storage Unit 610, 620(1), 620(2), 640 Storage Unit 630 Parts for dividing 700 Control device

Claims

1. A winding connection portion cover manufacturing apparatus for manufacturing a winding connection portion cover for covering a winding connection portion to which a plurality of stator windings are connected, comprising: 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 tubular member having an inner space with both ends open; a joining device that forms a joining portion at a predetermined location of the tubular member to divide the inner space into a first inner space and a second inner space; a cutting device that cuts a predetermined portion of the joint formed on the tubular member to divide the tubular member into a first tubular member having the first inner space and a second tubular member having the second inner space; A winding connection cover manufacturing apparatus comprising:

2. 2. The winding connection cover manufacturing apparatus according to claim 1, The winding shaft includes a first winding shaft rotatable about a first axis extending in the first direction and a second winding shaft rotatable about a second axis extending in the first direction, The first winding shaft and the second winding shaft are arranged such that a first end portion of the first winding shaft and a second end portion of the second winding shaft face each other along the first direction, 4. The winding connection cover manufacturing apparatus, wherein the winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft.

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

4. 3. The winding connection cover manufacturing apparatus according to claim 2, The insulating film extends in a width direction and a length direction that intersect with each other, the winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft while one end portion of the insulating film along the length direction is engaged with the first winding shaft and the second winding shaft.

5. 5. The winding connection cover manufacturing apparatus according to claim 4, the first winding shaft has a first groove, the first groove extending along the first direction and having an opening that opens to an outer circumferential surface of the first winding shaft including the first tip portion; the second winding shaft has a second groove, the second groove extending along the first direction and having an opening that opens to an outer circumferential surface of the second winding shaft including the second tip portion, the winding device is configured to wind the insulating film around the first winding shaft and the second winding shaft with the one end portion of the insulating film along the length direction inserted into the first groove of the first winding shaft and the second groove of the second winding shaft.

6. 6. The winding connection cover manufacturing apparatus according to claim 5, the winding device includes a guiding jig that guides the one end portion of the insulating film along the longitudinal direction into the first groove of the first winding shaft and the second groove of the second winding shaft.

7. 7. The winding connection cover manufacturing apparatus according to claim 6, The guiding tool includes a first guiding tool and a second guiding tool, the first guiding jig has a first guide groove extending in the first direction and a second direction intersecting the first direction, the first guide groove having a first opening and a second opening on a first side and a second side, respectively, along the second direction; the second guide jig has a second guide groove extending in the first direction and the second direction, the second guide groove having 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 one end portion of the insulating film along the longitudinal direction into the first groove of the first winding shaft via the first guide groove of the first guiding jig, and to insert the one end portion of the insulating film along the longitudinal direction into the first groove of the first winding shaft via the second guide groove of the second guiding jig.

8. The winding connection cover manufacturing apparatus according to claim 7, The first winding shaft and the first guide jig are configured to be movable in conjunction with each other along the first direction, The winding connection portion cover manufacturing apparatus is characterized in that the second winding shaft and the second guide jig are configured to be movable in conjunction with each other along the first direction.

9. The winding connection cover manufacturing apparatus according to claim 7, the first guide groove has a first guide groove portion formed such that an interval along a third direction intersecting the first direction and the second direction decreases from the first side to the second side along the second direction, the second guide groove has a second guide groove portion formed so that the spacing along the third direction decreases from the first side to the second side along the second direction.

10. 10. The winding connection cover manufacturing apparatus according to claim 9, the first guide groove has third guide groove portions that are disposed on the second side in the second direction relative to the first guide groove portions and are equidistantly spaced apart from each other in the third direction; the second guide groove has a fourth guide groove portion that is disposed on the second side in the second direction from the second guide groove portion and is equally spaced along the third direction.

11. The winding connection cover manufacturing apparatus according to any one of claims 7 to 10, the first guide jig has a first guide jig inner space extending along the first direction, the first guide jig inner space having an inner diameter larger than an outer diameter of the first winding spindle and communicating 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 having an inner diameter larger than an outer diameter of the second winding spindle and communicating with the fourth opening of the second guide groove, The first winding shaft is inserted into the first guide jig inner space so as to be rotatable with respect to the first guide jig, The second winding shaft is inserted into an inner space of the second guide jig so as to be rotatable relative to the second guide jig.

12. The winding connection cover manufacturing apparatus according to claim 11, the winding device is configured to, when inserting the one end portion of the insulating film along the length direction into the first groove of the first winding shaft and the second groove of the second winding shaft, adjust a rotational position of the first winding shaft so that the opening of the first groove faces the second opening of the first guide groove, and adjust a rotational position of the second winding shaft so that the opening of the second groove faces the fourth opening of the second guide groove.

13. The winding connection cover manufacturing apparatus according to any one of claims 2 to 10, an outer circumferential surface of the first tip end of the first winding shaft is formed such that an outer diameter increases from the second side to the first side along the first direction, a second winding shaft having an outer circumferential surface formed in a direction parallel to the first direction such that an outer diameter of the second winding shaft increases from the first side to the second side of the first winding shaft.

14. The winding connection cover manufacturing apparatus according to any one of claims 1 to 10, a winding connection cover manufacturing apparatus comprising: a holding device for holding the tubular member on which the joint is formed.

15. The winding connection cover manufacturing apparatus according to claim 14, the holding device includes a first holding portion and a second holding portion which hold a location on one side and a location on the other side of the joint along the extension direction of the tubular member, the first holding portion having a first holding member and a second holding member which clamp the location on the one side, and the second holding portion having a third holding member and a fourth holding member which clamp the location on the other side.

16. The winding connection cover manufacturing apparatus according to any one of claims 1 to 10, A winding connection portion cover manufacturing apparatus comprising: a receiving device including a receiving portion that receives the first cylindrical member and the second cylindrical member.

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

18. The winding connection cover manufacturing apparatus according to any one of claims 1 to 10, The cutting device has a blade portion on which a blade extending in a straight line is formed, and is configured so that, when viewed in a cross section perpendicular to the extension direction of the tubular member, the angle formed by the extension line of the blade and the extension line of the joint is an acute angle.

19. A method for manufacturing a winding connection cover for covering a winding connection part to which a plurality of stator windings are connected, comprising the steps of: A method for manufacturing a tubular member, comprising: winding an insulating film having a predetermined shape around a winding shaft that is rotatable about an axis extending in a first direction to form a tubular member having an interior space that is open at both ends; forming a joint at a predetermined location of the tubular member to divide the inner space into a first inner space and a second inner space; cutting a predetermined portion of the joint formed on the tubular member to divide the tubular member into a first tubular member having the first inner space and a second tubular member having the second inner space; A method for manufacturing a winding connection cover comprising:

20. 20. A method for manufacturing a winding connection cover according to claim 19, comprising the steps of: a winding connection portion cover manufacturing method, characterized in that in the step of forming the tubular member, the insulating film is wound around a first winding shaft that is rotatable about a first axis extending in the first direction and a second winding shaft that is rotatable about a second axis extending in the first direction and is positioned at a distance from the first winding shaft along the first direction.

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