Insulation paper molding device

Abstract

To provide an insulation paper molding device capable of subjecting insulation paper with high molding quality to stripe formation without applying a large load on the insulation paper.SOLUTION: An insulation paper molding device 10 molds insulation paper 100 fed from an insulation paper roll 22 on which the insulation paper 100 is wound into a roll shape. The insulation paper molding device 10 has: a conveyance unit 30 that is disposed downstream from the insulation paper roll 22 in a feeding direction of the insulation paper 100 and conveys the insulation paper 100 toward the downstream side with respect to the insulation paper 100; and a press unit 50 that is disposed between the insulation paper roll 22 and the conveyance unit 30 and makes a load act on the insulation paper 100 by press operation to perform stripe formation.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an insulating paper forming apparatus.

Background Art

[0002] Conventionally, as disclosed in Patent Document 1 below, there has been provided one in which a bent portion of insulating paper is provided between a stocker of insulating paper and a feed roller. The bent portion of the insulating paper disclosed in Patent Document 1 adjusts the shape of the insulating paper according to the shape when the grooved insulating paper is cut by a grooved insulating paper forming and inserting device and inserted into the core.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, in the conventional insulating paper forming apparatus having a configuration such as the bent portion of the insulating paper disclosed in Patent Document 1 above, it is necessary to convey the insulating paper while applying a large tension to the insulating paper. Therefore, as a motor for applying a conveying force to the insulating paper, one that exhibits a large torque is required. Further, in the conventional insulating paper forming apparatus, when the insulating paper is conveyed at a high speed while a large tension is applied to the insulating paper, paper slippage easily occurs in the roller portion for feeding the insulating paper. As a result, in the prior art, there is a problem that the risk of damage to the insulating paper increases, or the position of the texture imparted to the insulating paper becomes unstable, resulting in a concern that problems may occur in the forming quality of the insulating paper.

[0005] Therefore, an object of the present invention is to provide an insulating paper forming apparatus capable of performing texturing on insulating paper with high forming quality without applying a large load to the insulating paper.

Means for Solving the Problem

[0006] (1) The insulating paper forming device of the present invention is an insulating paper forming device for forming the insulating paper sent out from an insulating paper roll in which the insulating paper is wound in a roll shape, and is arranged on the downstream side in the conveying direction of the insulating paper from the insulating paper roll, and conveys the insulating paper toward the downstream side with respect to the insulating paper. It is characterized by having a conveying unit and a pressing unit arranged between the insulating paper roll and the conveying unit, and performing ribbing by applying a load to the insulating paper by a pressing operation.

[0007] In the insulating paper forming device of the present invention, ribbing can be performed on the insulating paper by a pressing operation in a pressing unit provided between an insulating paper roll and a conveying unit for conveying the insulating paper. Therefore, the insulating paper forming device of the present invention can perform ribbing on the insulating paper without applying a large load to the insulating paper compared with the prior art. Further, since the insulating paper forming device of the present invention can perform ribbing without conveying the insulating paper at high speed in a state where a large tension is applied to the insulating paper as in the prior art, breakage of the insulating paper and displacement of the ribbing position are less likely to occur. Thereby, according to the insulating paper forming device of the present invention, ribbing can be performed on the insulating paper with high forming quality.

[0008] (2) It is preferable that the insulating paper forming device of the present invention is provided with a plurality of ribbing portions for performing ribbing on the insulating paper in the pressing unit so that they can operate independently.

[0009] In the insulating paper forming device of the present invention, as described in (2) above, since a plurality of ribbing portions are provided in the pressing unit so that they can operate independently, a plurality of ribbings can be performed together.

[0010] (3) It is preferable that the insulating paper forming device of the present invention is provided with a plurality of ribbing portions for performing ribbing on the insulating paper in the pressing unit so that they can operate independently, and the ribbing by each ribbing portion can be performed by a single pressing operation.

[0011] By configuring the insulating paper forming apparatus of the present invention as described in (3) above, a plurality of ribbings can be performed by a single pressing operation. Therefore, according to the insulating paper forming apparatus of the present invention, ribbing of the insulating paper can be efficiently performed.

[0012] (4) It is preferable that the insulating paper forming apparatus of the present invention includes a plurality of ribbing portions that can operate independently to perform ribbing on the insulating paper, and has a load adjusting portion for individually adjusting the magnitude of the load applied to the insulating paper by each ribbing portion.

[0013] By configuring the insulating paper forming apparatus of the present invention as described in (4) above, the load can be adjusted so that the load required for each ribbing is applied to the insulating paper without excess or deficiency.

[0014] (5) It is preferable that the insulating paper forming apparatus of the present invention performs the pressing operation on the insulating paper by the pressing portion while the conveyance of the insulating paper by the conveyance portion is stopped.

[0015] By configuring the insulating paper forming apparatus of the present invention as described in (5) above, the pressing operation can be performed while the conveyance of the insulating paper by the conveyance portion is stopped. Therefore, by configuring the insulating paper forming apparatus of the present invention as described in (5) above, ribbing of the insulating paper can be performed with even higher quality.

Effects of the Invention

[0016] According to the present invention, an insulating paper forming apparatus that solves the above-described problems can be provided.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0018] Hereinafter, an insulating paper molding device 10 according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, first, the configuration of the insulating paper molding device 10 will be described, and then the operation of the insulating paper molding device 10 will be described. Note that each figure is schematically shown for easy understanding, and it should be noted that it may be different from the actual shape, size, and arrangement of components. Also, note that hatching may be omitted in the cross-sections of each figure.

[0019] ≪Configuration of Insulating Paper Molding Device 10≫ The insulating paper forming device 10 is a device for forming the insulating paper 100 used in motors and the like. As shown in FIG. 1, the insulating paper forming device 10 exemplified in this embodiment forms the creases 120 for bending the insulating paper 100 inserted into the slots 112 together with the coil into a predetermined shape when assembling a coil (not shown) into the slots 112 provided in the stator core 110 constituting the motor. After the insulating paper 100 is provided with the creases 120 by the insulating paper forming device 10, it is cut to a length suitable for insertion into the slots 112 and bent along the creases 120, and then assembled into the slots 112. As shown in FIGS. 1 and 2, in this embodiment, the insulating paper 100 is assembled into the slots 112 in a state of being bent into a substantially pentagonal prism shape. Therefore, the insulating paper forming device 10 is capable of forming four creases 120 (first crease 120a to fourth crease 120d) on the insulating paper 100. As shown in FIG. 3, the insulating paper forming device 10 includes a roll installation part 20, a conveyance part 30, and a press part 50.

[0020] The roll installation part 20 is a part where the insulating paper roll 22 with the insulating paper 100 wound in a roll shape is installed. The roll installation part 20 can set the insulating paper roll 22 rotatably. Thereby, the insulating paper forming device 10 can pay out the insulating paper 100 from the roll installation part 20 in a long strip shape.

[0021] The conveying unit 30 is arranged on the downstream side in the paper feeding direction of the insulating paper 100 from the insulating paper roll 22 in the insulating paper forming apparatus 10. The conveying unit 30 can convey the insulating paper 100 by applying a tensile force in the downstream direction to the insulating paper 100. As the conveying unit 30, any appropriate unit can be adopted as long as it can convey the insulating paper 100. In the present embodiment, the conveying unit 30 is provided with a driving roller 32 and a driven roller 34. The driving roller 32 is a roller that is driven by receiving power from a driving source such as a motor. The driven roller 34 is a roller arranged via a clearance through which the insulating paper 100 can pass with respect to the driving roller 32. The conveying unit 30 can convey the insulating paper 100 by driving the driving roller 32 with the insulating paper 100 sandwiched between the driving roller 32 and the driven roller 34, thereby applying a tensile force in the downstream direction to the insulating paper 100.

[0022] The pressing unit 50 is a part arranged between the insulating paper roll 22 (roll installation unit 20) and the conveying unit 30 in the insulating paper forming apparatus 10. The pressing unit 50 performs ribbing by applying a load to the insulating paper 100 by a pressing operation. As shown in FIGS. 4 to 6, the pressing unit 50 includes a press die 52, a press punch base 54, a punch 56, and a load adjustment unit 58.

[0023] The press die 52 is arranged to face the press punch base 54. The press die 52 has an insulating paper passing region 60 through which the insulating paper 100 passes on the surface (die facing surface 52a) facing the press punch base 54. The press die 52 has insulating paper guides 62, 62 on one side and the other side in the width direction with respect to the region that becomes the insulating paper passing region 60. The insulating paper guides 62, 62 are provided so as to extend along the passing direction of the insulating paper 100 passing through the insulating paper passing region 60. The insulating paper guides 62, 62 may be any that can guide the insulating paper 100. In the present embodiment, the insulating paper guides 62, 62 are formed by convex portions protruding from the die facing surface 52a.

[0024] The press die 52 has one or more concavities and convexities in the insulating paper passing region 60 of the die facing surface 52a according to the pattern (ribbing pattern) of the ribs applied to the insulating paper 100. In the present embodiment, corresponding to the first rib 120a to the fourth rib 120d applied to the insulating paper 100, four first recesses 53a, second recesses 53b, third recesses 53c, and fourth recesses 53d are provided in the width direction of the press die 52.

[0025] The press punch base 54 is disposed opposite to the press die 52 and is configured to be movable closer to and away from the press die 52 by receiving power from a power source (not shown). In the press punch base 54, a punch mounting portion 64 is provided on the base facing surface 54a facing the die facing surface 52a.

[0026] The punch 56 is a member attached to the punch mounting portion 64 of the press punch base 54. Therefore, the punch 56 moves integrally with the press punch base 54 in a direction approaching and separating from the press die 52. The punch 56 constitutes a ribbing portion 57 for ribbing the insulating paper 100 in combination with the press die 52. The punch 56 may be constituted by a single member, but in the present embodiment, it is constituted by one first punch 66 and two second punches 68.

[0027] The first punch 66 is for forming the second rib 120b and the third rib 120c attached to the insulating paper 100. The first punch 66 constitutes a first ribbing portion 57a for ribbing the insulating paper 100 in combination with the press die 52. The first punch 66 is provided at the center in the width direction at the punch mounting portion 64 of the press punch base 54. The first punch 66 is provided at a position facing the second recess 53b and the third recess 53c provided in the press punch base 54. The first punch 66 has a second convex portion 56b and a third convex portion 56c that fit into the second recess 53b and the third recess 53c, respectively. Therefore, when the insulating paper 100 is sandwiched between the first punch 66 and the press punch base 54, the second rib 120b can be formed by the second recess 53b and the second convex portion 56b, and the third rib 120c can be formed in part by the third recess 53c and the third convex portion 56c.

[0028] The second punch 68 arranged on one side in the width direction with respect to the first punch 66 (hereinafter, also referred to as "second punch 68a") is for attaching the first rib 120a to the insulating paper 100. The second punch 68 arranged on the other side in the width direction with respect to the first punch 66 (hereinafter, also referred to as "second punch 68b") is for attaching the fourth rib 120d to the insulating paper 100. The second punches 68a and 68b each constitute a second ribbing portion 57b for ribbing the insulating paper 100 in combination with the press die 52. The second punches 68a and 68b are provided at positions facing the first recess 53a and the fourth recess 53d provided in the press punch base 54, respectively. The second punches 68a and 68b have a first convex portion 56a and a fourth convex portion 56d that fit into the first recess 53a and the fourth recess 53d, respectively. Therefore, when the insulating paper 100 is sandwiched between the second punch 68a and the press punch base 54, the first rib 120a can be formed by the first recess 53a and the first convex portion 56a. Similarly, when the insulating paper 100 is sandwiched between the second punch 68b and the press punch base 54, the fourth recess 53d and the fourth convex portion 56d can be formed.

[0029] The punches 56 (the first punch 66 and the second punches 68) can be directly or indirectly attached to the press punch base 54 respectively. In the present embodiment, the first punch 66 and the second punches 68, 68 forming the punch 56 are attached via the load adjuster 58 respectively.

[0030] The load adjuster 58 individually adjusts the magnitude of the load acting on the insulating paper 100 by the above-described first ribbed portion 57a and second ribbed portion 57b. In the present embodiment, the load adjuster 58 can adjust the magnitude of the load by individually adjusting the biasing force of the first punch 66 against the press die 52 and the biasing force of the second punches 68 (the second punch 68a and the second punch 68b) against the press die 52. Specifically, the load adjuster 58 includes a first biasing member 70 provided between the press punch base 54 and the first punch 66, and second biasing members 72 (the second biasing member 72a and the second biasing member 72b) provided between the press punch base 54 and the second punches 68 (the second punch 68a and the second punch 68b). The first biasing member 70 and the second biasing members 72 can be constituted by appropriate biasing members, but in the present embodiment, they are constituted by springs. The first biasing member 70 and the second biasing members 72 may exhibit the same biasing force respectively, but can also be appropriately changed according to the strength of each rib formed on the insulating paper 100 and the like.

[0031] ≪Operation of the Insulating Paper Molding Apparatus 10≫ The above-described insulating paper molding apparatus 10 can perform the operation of forming a plurality of ribs 120 (ribbing) on the insulating paper 100 by a single pressing operation. In the present embodiment, the insulating paper molding apparatus 10 can form four ribs 120 including the first rib 120a to the fourth rib 120d in the width direction of the insulating paper 100 by a single pressing operation.

[0032] When performing the ribbing operation by the insulating paper forming device 10, first, the drive roller 32 provided in the conveying unit 30 is driven. As a result, the insulating paper 100 sandwiched between the clearances of the drive roller 32 and the driven roller 34 is fed out from the insulating paper roll 22 provided in the roll installation unit 20. The insulating paper 100 fed out from the insulating paper roll 22 sequentially passes through the insulating paper forming device 10 provided between the roll installation unit 20 and the conveying unit 30.

[0033] On the other hand, as shown in FIG. 3, in the insulating paper forming device 10, the insulating paper 100 sequentially fed from the insulating paper roll 22 as described above is supplied between the press die 52 and the punch 56 in the press unit 50. Then, as shown in FIG. 4, the insulating paper forming device 10 sandwiches the insulating paper 100 supplied between the press die 52 and the punch 56 by a pressing operation. As a result, as shown in FIG. 5, the first recess 53a to the fourth recess 53d and the first protrusion 56a to the fourth protrusion 56d are fitted together, and four ribs 120 composed of the first rib 120a to the fourth rib 120d are formed on the insulating paper 100.

[0034] Here, when the insulating paper forming device 10 sandwiches the insulating paper 100 and performs a pressing operation, the conveyance of the insulating paper 100 by the conveying unit 30 is stopped. Therefore, the insulating paper forming device 10 performs a pressing operation on the insulating paper 100 while the conveyance of the insulating paper 100 is stopped. Further, when the pressing operation by the insulating paper forming device 10 is completed, the press die 52 and the press punch base 54 (punch 56) are separated from each other in the press unit 50. In this state, the conveying unit 30 resumes the conveyance of the insulating paper 100. In this way, the insulating paper forming device 10 alternately performs ribbing on the insulating paper 100 and conveyance of the insulating paper 100 to the press unit 50. In this way, the insulating paper forming device 10 can attach a plurality of ribs 120 to the insulating paper 100 by a single pressing operation. The insulating paper 100 with the ribs 120 attached is cut to a predetermined length at a cutting unit 80 (see FIG. 3) provided on the downstream side of the press unit 50.

[0035] ≪Function and Effect≫ The insulating paper molding apparatus 10 according to the above-described embodiment has characteristic configurations as shown in the following (a) to (e). Thereby, the insulating paper molding apparatus 10 can achieve effects peculiar to the present invention.

[0036] (a) The above-described insulating paper molding apparatus 10 is an insulating paper molding apparatus 10 that molds the insulating paper 100 sent out from the insulating paper roll 22 around which the insulating paper 100 is wound in a roll shape, and is arranged on the downstream side in the conveying direction of the insulating paper 100 with respect to the insulating paper roll 22, and a conveying unit 30 that conveys the insulating paper 100 toward the downstream side with respect to the insulating paper 100, and a pressing unit 50 that is arranged between the insulating paper roll 22 and the conveying unit 30 and performs ribbing by applying a load to the insulating paper 100 by a pressing operation.

[0037] In the above-described insulating paper molding apparatus 10, ribbing can be performed on the insulating paper 100 by a pressing operation in the pressing unit 50 provided between the insulating paper roll 22 and the conveying unit 30 for conveying the insulating paper 100. Therefore, the above-described insulating paper molding apparatus 10 can perform ribbing on the insulating paper 100 without applying a large load to the insulating paper 100 as compared with the conventional art. Further, since the above-described insulating paper molding apparatus 10 can perform ribbing without conveying the insulating paper 100 at a high speed in a state where a large tension is applied to the insulating paper 100 as in the conventional art, breakage of the insulating paper 100 and displacement of the ribbing position are less likely to occur. Thereby, according to the above-described insulating paper molding apparatus 10, ribbing can be performed on the insulating paper 100 with high molding quality.

[0038] (b) In the above-described insulating paper molding apparatus 10, the pressing unit 50 is provided with a plurality of ribbing portions 57 that can operate independently to perform ribbing on the insulating paper 100.

[0039] In the above-described insulating paper molding apparatus 10, as in the above (b), since a plurality of ribbing portions 57 are provided in the pressing unit 50 so as to be independently operable, a plurality of ribbings can be performed collectively.

[0040] (c) The above-described insulating paper forming apparatus 10 is provided with a plurality of ribbing portions 57 that can operate independently to rib the insulating paper 100, and the ribbing by each ribbing portion 57 can be performed by a single pressing operation.

[0041] By configuring the above-described insulating paper forming apparatus 10 as in (c) above, a plurality of ribbings can be performed by a single pressing operation. Therefore, according to the above-described insulating paper forming apparatus 10, the ribbing of the insulating paper 100 can be efficiently performed.

[0042] (d) The above-described insulating paper forming apparatus 10 is provided with a plurality of ribbing portions 57 that can operate independently to rib the insulating paper 100, and has a load adjusting portion 58 that individually adjusts the magnitude of the load applied to the insulating paper 100 by each ribbing portion 57.

[0043] By configuring the above-described insulating paper forming apparatus 10 as in (d) above, the load can be adjusted so that the load required for each ribbing is applied to the insulating paper 100 without excess or deficiency.

[0044] (e) The above-described insulating paper forming apparatus 10 performs a pressing operation on the insulating paper 100 by the pressing portion 50 while the conveyance of the insulating paper 100 by the conveyance portion 30 is stopped.

[0045] By configuring the above-described insulating paper forming apparatus 10 as in (e) above, a pressing operation can be performed in a state where the conveyance of the insulating paper 100 by the conveyance portion 30 is stopped. Therefore, by configuring the above-described insulating paper forming apparatus 10 as in (e) above, the ribbing of the insulating paper 100 can be performed with even higher quality.

[0046] ≪Modification Example≫ The above-described insulating paper forming apparatus 10 merely shows one embodiment of the present invention, and various modifications, omissions, additions, etc. can be made within the scope not departing from the gist of the present invention. That is, the insulating paper forming apparatus 10 may have the configuration according to (a) above and may not have some or all of the configurations according to (b) to (e) above, or may have other configurations. For example, the insulating paper forming apparatus 10 may be configured to include the above-described cutting unit 80 as part of its configuration, or may be configured not to include the cutting unit 80 as part of the insulating paper forming apparatus 10.

[0047] As described in (b) above, the insulating paper forming apparatus 10 is provided with a plurality of ribbing portions 57 that can operate independently to rib the insulating paper 100. However, the present invention is not limited to this. For example, the insulating paper forming apparatus 10 may have a single ribbing portion 57, or a plurality of ribbing portions 57 that operate in conjunction with each other.

[0048] As described in (c) above, the insulating paper forming apparatus 10 can perform ribbing by a plurality of ribbing portions 57 with a single pressing operation. However, the present invention is not limited to this. The insulating paper forming apparatus 10 may be provided with another pressing unit having a similar configuration in addition to the pressing unit 50, and each pressing unit may perform a pressing operation individually.

[0049] As described in (d) above, the insulating paper forming apparatus 10 is provided with a load adjusting unit 58 so that the magnitude of the load applied to the insulating paper 100 by each ribbing portion 57 (first ribbing portion 57a, second ribbing portion 57b) can be adjusted individually. However, the present invention is not limited to this. The insulating paper forming apparatus 10 may not be provided with the load adjusting unit 58, may be configured such that the load cannot be adjusted by the ribbing portion 57, or may not be provided with the load adjusting unit 58 for some of the ribbing portions 57.

[0050] The insulating paper forming device 10 performs a pressing operation on the insulating paper 100 by the pressing unit 50 while the conveyance of the insulating paper 100 by the conveyance unit 30 is stopped as described in (e) above, but the present invention is not limited to this. For example, the insulating paper forming device 10 may perform the pressing operation without completely stopping the conveyance of the insulating paper 100 by varying the conveyance speed of the insulating paper 100 within a range that does not interfere with operations such as ribbing by the pressing operation.

[0051] The invention of the present application is not limited to the configurations described in the above-described embodiments and the like, and can be appropriately modified in design without departing from the scope of the technical idea of the present invention. The constituent elements of the above-described embodiments and modification examples may be arbitrarily selected and combined. Also, any constituent element of each embodiment or modification example may be arbitrarily combined with any constituent element described in the means for solving the problems, the form for implementing the invention, etc., or a constituent element embodying any constituent element described in the means for solving the problems, the form for implementing the invention, etc. It is advisable to configure them in combination. Regarding these, there is also an intention to obtain rights in the present application or a divisional application, a change application, etc. based on the present application.

Industrial Applicability

[0052] The present invention can be suitably used in general rotor structures including magnets fixed to magnet housing portions provided in rotor cores.

Explanation of Reference Numerals

[0053] 10: Insulating paper forming device 22: Insulating paper roll 30: Conveyance unit 50: Pressing unit 57: Ribbing unit 58: Load adjustment unit 100: Insulating paper

Claims

1. An insulating paper forming device for forming the insulating paper fed from an insulating paper roll in which the insulating paper is wound in a roll shape, comprising: a conveying unit arranged downstream of the insulating paper roll in the conveying direction of the insulating paper and conveying the insulating paper toward the downstream side with respect to the insulating paper; a pressing unit arranged between the insulating paper roll and the conveying unit and performing ribbing by applying a load to the insulating paper by a pressing operation; characterized by having the above. An insulating paper forming device.

2. The insulating paper forming device according to claim 1, characterized in that the pressing unit is provided with a plurality of ribbing units for performing ribbing on the insulating paper and capable of operating independently.

3. The insulating paper forming device according to claim 1, characterized in that the pressing unit is provided with a plurality of ribbing units for performing ribbing on the insulating paper and capable of operating independently, and the ribbing by each ribbing unit can be performed by a single pressing operation.

4. The insulating paper forming device according to claim 1 or 2, characterized in that the pressing unit is provided with a plurality of ribbing units for performing ribbing on the insulating paper and capable of operating independently, and has a load adjusting unit for individually adjusting the magnitude of the load applied to the insulating paper by each ribbing unit.

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