Insulation paper winding mechanism

Abstract

To provide an insulation paper winding mechanism that can automate manufacturing of a roll of insulation paper for a transformer.SOLUTION: An insulation paper winding mechanism, which winds insulation paper covering a transformer wire into a cylindrical shape, includes a rotating cylinder 10 that rotates while clamping an end of the insulation paper and winds the insulation paper around an outer surface thereof, and a prevention member 30 that prevents the insulation paper from slipping out from the rotating cylinder 10.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an insulation paper winding mechanism. [Background technology]

[0002] The manufacturing process of a transformer includes, for example, a winding process in which an electric wire covered with insulating paper is wound to produce a coil, an interior mounting process in which an iron core and a coil are combined, an assembly process in which the coil with the iron core assembled therein is dried and stored in a case, an inspection process in which a shipping inspection is performed, etc. In order to connect the end of the electric wire wound around the coil in the assembly process to an external terminal such as the live part of the transformer, in the winding process, a lead wire is led out from the coil (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-92681 Summary of the Invention [Problem to be solved by the invention]

[0004] In the process of covering the electric wire for the transformer with insulating paper as described above, insulating paper wound into a cylindrical shape (hereinafter referred to as a roll) is used. However, the process of manufacturing the roll of insulating paper is performed manually, which has problems of poor workability and productivity as well as high manufacturing costs.

[0005] The present invention has been made in view of the above circumstances, and has an object to provide an insulating paper winding mechanism that can automate the production of a roll of insulating paper for transformers. [Means for solving the problem]

[0006] The insulating paper winding mechanism of the present invention is an insulating paper winding mechanism that winds insulating paper that covers a transformer wire into a cylindrical shape, and is equipped with a rotating cylinder that rotates while clamping an end of the insulating paper and winds the insulating paper onto its outer surface, and a prevention member that prevents the insulating paper from coming loose from the rotating cylinder. Effect of the Invention

[0007] According to the present invention, it is possible to provide an insulating paper winding mechanism that can automate the production of a roll of insulating paper for transformers. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a configuration of a main part of an insulating paper winding mechanism according to a first embodiment. FIG. [Diagram 2] FIG. 2 is a vertical cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. [Figure 4] 1 is a vertical cross-sectional view showing a configuration of a main part of an insulating paper winding mechanism according to a first embodiment. [Diagram 5] 5A to 5C are explanatory diagrams illustrating the operation of the insulating paper winding mechanism according to the first embodiment winding insulating paper. [Figure 6] 10 is a cross-sectional view showing the configuration of a rotating cylinder of an insulating paper winding mechanism according to a second embodiment. FIG. [Figure 7] 11 is a cross-sectional view showing the configuration of a rotating cylinder of an insulating paper winding mechanism according to a third embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the present invention will be described with reference to the drawings showing an embodiment thereof.

[0010] (Embodiment 1) The insulating paper winding mechanism according to this embodiment is used, for example, in a machine that winds insulating paper into a cylindrical shape to cover an electric wire for a transformer. Fig. 1 is a perspective view showing the main configuration of an insulating paper winding mechanism 100 according to embodiment 1. The insulating paper winding mechanism 100 includes a rotating cylinder 10 that rotates by pinching an end of insulating paper P and winding the insulating paper P onto its outer surface, a support table 20 that has a flat support surface 21 that supports the insulating paper P and supplies the insulating paper P to the rotating cylinder 10, and a holding table 60 that holds the rotating cylinder 10. In Fig. 1, the arrow indicates the supply direction of the insulating paper P.

[0011] The support stand 20 supplies the insulating paper P to the rotating shell 10 from a position slightly away from the rotating shell 10. In other words, the support stand 20 is disposed on the supply side of the insulating paper P with respect to the rotating shell 10. The rotating shell 10 is disposed at a position intersecting with a plane including the support surface 21 of the support stand 20. Hereinafter, for convenience, the supply side of the insulating paper P with respect to the rotating shell 10 will also be referred to as "one side."

[0012] The support base 20 has a generally rectangular plate shape extending in a direction perpendicular to the supply direction of the insulating paper P. The long side of the support base 20 facing the rotating cylinder 10 is bent downward. The insulating paper P is placed on the upper surface of the support surface 21, and the insulating paper P is guided by the support surface 21 to move toward the rotating cylinder 10.

[0013] FIG. 2 is a vertical cross-sectional view taken along line II-II in FIG. The rotating cylinder 10 has a cylindrical shape and extends in a direction perpendicular to the supply direction of the insulating paper P, i.e., in the longitudinal direction of the support base 20. The rotating cylinder 10 is made of metal, for example, and the length of the rotating cylinder 10 is longer than the length of the support base 20.

[0014] The rotating cylinder 10 also has a clamping opening 11 that clamps an end of the insulating paper P supplied from the support stand 20 side, i.e., from one side. The clamping opening 11 is slit-shaped. That is, the clamping opening 11 is a notch that penetrates the rotating cylinder 10 in the thickness direction, and is formed linearly from one end of the rotating cylinder 10 to the other end along the length direction. The rotating cylinder 10 rotates while clamping the end of the insulating paper P, and wraps the insulating paper P around the outer circumferential surface to form a cylindrical shape.

[0015] A rotation device 40 is provided at one end of the rotating barrel 10 to support the rotating barrel 10 and rotate it around a rotation center O (see FIG. 1). The rotation device 40 includes a bearing portion (not shown) that rotatably supports the end face of the rotating barrel 10, and a servo motor (not shown) that rotates the rotating barrel 10 forward or backward. The rotation of the servo motor is controlled by a control device (not shown). Although omitted in FIG. 1 for convenience, a bearing portion for supporting the rotating barrel 10 so as to be rotatable is also provided at the other end of the rotating barrel 10.

[0016] A holding stand 60 is disposed on the rotating cylinder 10 on the opposite side to the one side in the radial direction of the rotating cylinder 10. The holding stand 60 includes a plurality of prevention members 30. The prevention members 30 prevent the insulating paper P from falling out of the clamping opening 11 when the rotating cylinder 10 rotates.

[0017] The holding stand 60 has a storage section 61 that stores multiple prevention members 30 inside, an attachment section 63 for attaching the storage section 61 to the winding machine, and a holding round bar 64 that loosely passes through and holds the multiple prevention members 30.

[0018] The storage section 61 is made of a metal plate material and has an L-shape in a vertical cross section. The storage section 61 extends in the length direction of the rotating cylinder 10. Plate-shaped side walls 62 are erected on both ends of the storage section 61. The two side walls 62 are arranged opposite each other and hold both ends of the holding round bar 64. That is, the holding round bar 64 is horizontally supported between the two side walls 62. As described above, a plurality of preventing members 30 are stored inside the storage section 61, and the plurality of preventing members 30 are arranged in parallel in the length direction of the rotating cylinder 10, i.e., in the length direction of the holding round bar 64. Between the preventing members 30, spacers 65 extending in the length direction of the rotating cylinder 10 are arranged, and both ends of the spacers 65 are fixed to the preventing members 30.

[0019] FIG. 3 is a perspective view showing the prevention member 30. As shown in FIG. The prevention member 30 is an upright, substantially rectangular, thick plate-like member that is C-shaped and open in the opposite direction. That is, the prevention member 30 has a recess 31 that is open on the one side (the support base 20 side) and surrounds the rotating cylinder 10 from the opposite side. The inner surface of the recess 31 is a curved surface with a diameter larger than the outer diameter of the rotating cylinder 10, and the rotating cylinder 10 is disposed within the recess 31 of the prevention member 30. As described above, the multiple prevention members 30 are arranged side by side in the thickness direction. The multiple prevention members 30 are disposed at multiple locations, including both ends and the middle part of the rotating cylinder 10, at equal intervals in the length direction of the rotating cylinder 10.

[0020] A contact portion 32 that comes into contact with the outer circumferential surface of the rotating shell 10 is formed in an upper portion of the inner surface of the recess 31 opposite to the one side (open side), as described below. That is, the contact portion 32 is formed obliquely upward with respect to the rotating shell 10. The contact portion 32 has a flat surface 321, and the flat surface 321 comes into contact with the outer circumferential surface of the rotating shell 10 (see the dashed ellipse in FIG. 2).

[0021] Further, the prevention member 30 has a through hole 34 formed in a corner near the contact portion 32, which penetrates the prevention member 30 in the thickness direction. In vertical cross section, the through hole 34 is elliptical. The through hole 34 extends in a direction perpendicular to the length direction of the holding round bar 64, i.e., in the direction of approaching and separating from the rotating cylinder 10. The holding round bar 64 passes through the through hole 34 of each prevention member 30 with a clearance.

[0022] Furthermore, in the prevention member 30, the opposite side surface opposite the recess 31 faces the accommodation portion 61, and a retaining rod 33 for retaining the prevention member 30 in the accommodation portion 61 is provided on the opposite side surface. The retaining rod 33 protrudes from the opposite side surface, one end is fixed to the opposite side surface of the prevention member 30, and the other end is loosely inserted into a through hole (not shown) formed in the accommodation portion 61. Therefore, the retaining rod 33 can move in the length direction together with the prevention member 30.

[0023] That is, the through hole 34 and the retaining rod 33 fix the position of the prevention member 30 in the vertical direction and the longitudinal direction of the rotating barrel 10, but the prevention member 30 can move within a predetermined range in the direction toward and away from the rotating barrel 10.

[0024] 4 is a vertical cross-sectional view showing the positional relationship between the support base 20, the rotating cylinder 10, and the prevention member 30 in the insulating paper winding mechanism 100 according to embodiment 1. In addition, in FIG. 4, an arrow indicates the rotation direction of the rotating cylinder 10, and a dashed line indicates an imaginary plane including the support surface 21 of the support base 20.

[0025] As described above, the contact portion 32 of the prevention member 30 is formed diagonally above the rotating cylinder 10. More specifically, in the rotating cylinder 10, the rotation angle (see angle θ in FIG. 4) from the intersection position where the rotating cylinder 10 intersects with a plane including the support surface 21 of the support base 20 in the rotation direction to the contact point with the contact portion 32 of the prevention member 30 (see the dashed oval portion in FIG. 4) is within a range of 180° to 300°.

[0026] In other words, the contact portion 32 is formed so as to face the radial direction of the rotating shell 10 at a predetermined position (contact point) on the outer circumferential surface within a rotation angle range of 180° to 300° based on the intersecting position on the rotating shell 10. Preferably, the rotation angle is within a range of 190° to 270°, and more preferably, the rotation angle is 250°.

[0027] The insulating paper winding mechanism 100 further includes a biasing member 50 that biases the preventing member 30 toward the rotating cylinder 10. The biasing member 50 is interposed between the preventing member 30 and the accommodating portion 61. The biasing member 50 is, for example, a spring, and is fitted onto the retaining rod 33. The biasing member 50 is loosely fitted into the retaining rod 33. The biasing member 50 allows the preventing member 30 to move in the direction toward and away from the rotating cylinder 10, and such movement of the preventing member 30 is guided by the through hole 34 and the retaining rod 33.

[0028] As described above, the rotating barrel 10 is held by the rotating device 40, while the preventing member 30 is pressed toward the rotating barrel 10 by the biasing member 50, so that the outer peripheral surface of the rotating barrel 10 comes into contact with the contact portion 32 of the preventing member 30.

[0029] In addition, in the insulating paper winding mechanism 100, the curvature of the inner surface of the prevention member 30 (recess 31) is appropriately adjusted, and the gap G between the rotating cylinder 10 and the prevention member 30 is gradually narrowed from the edge of the recess 31 on the support base 20 side along the rotation direction of the prevention member 30 toward the contact portion 32.

[0030] 5 is an explanatory diagram illustrating the operation of the insulating paper winding mechanism 100 according to the first embodiment to wind the insulating paper P. The operation of winding the insulating paper P is performed in the order of FIG. 5A to FIG. 5D.

[0031] First, as shown in Fig. 5A, insulating paper P is supplied by support stand 20. The insulating paper P moves on support surface 21 of support stand 20 toward the rotating cylinder 10. One end of the supplied insulating paper P enters the inside of rotating cylinder 10 through clamping opening 11 of the rotating cylinder 10 and is clamped by clamping opening 11 (Fig. 5B). Thereafter, rotation device 40 rotates rotating cylinder 10.

[0032] When the rotating cylinder 10 rotates, one end of the insulating paper P is clamped in the clamping opening 11, so that the insulating paper P is pulled towards the rotating cylinder 10 (FIG. 5C). The insulating paper P is dragged by the rotating cylinder 10 and enters the gap G from the edge of the recess 31 on the support stand 20 side (FIG. 5D). As described above, the gap G gradually narrows as the insulating paper P approaches the contact portion 32, so that the insulating paper P is guided by the gap G and curves along the outer circumferential surface of the rotating cylinder 10. Therefore, the air between the outer circumferential surface of the rotating cylinder 10 and the insulating paper P is pushed out, and the outer circumferential surface of the rotating cylinder 10 and the insulating paper P are tightly attached to each other. This allows the insulating paper P to be wound into a neat cylindrical shape.

[0033] As the rotating shell 10 rotates further, the insulating paper P becomes interposed between the contact portion 32 of the prevention member 30 and the rotating shell 10, and is clamped between the contact portion 32 and the rotating shell 10. This prevents the insulating paper P from slipping out through the clamping opening 11. Even if the rotating shell 10 continues to rotate, the insulating paper P remains clamped between the contact portion 32 and the rotating shell 10, so the insulating paper P will not slip out through the clamping opening 11.

[0034] Furthermore, even after the second turn, the insulating paper P is guided into the gap G and wound, and the insulating paper P is kept sandwiched between the contact portion 32 and the rotating cylinder 10, so that the air between the inner and outer insulating papers P is pushed out and the insulating papers P are tightly adhered to each other. As a result, a roll of insulating paper P with a regular shape can be obtained.

[0035] As described above, the prevention member 30 is held by the through hole 34 and the holding rod 33 so that it can be moved toward and away from the rotating cylinder 10, so that as the rotation speed of the rotating cylinder 10 increases, that is, as the thickness of the wound body of insulating paper P increases, the prevention member 30 moves away from the rotating cylinder 10. Therefore, it is possible to accommodate variations in the thickness of the wound body of insulating paper P.

[0036] The roll of insulating paper P wound on the outer circumferential surface of the rotating cylinder 10 in the above manner is removed from the rotating cylinder 10 to obtain a cylindrical roll of insulating paper P. This makes it possible to automate the manufacture of the roll of insulating paper P for transformers, thereby improving workability and productivity. Thereafter, an electric wire for a transformer is passed inside the obtained roll of insulating paper P to cover the electric wire.

[0037] In the insulating paper winding mechanism 100 of embodiment 1, as described above, the contact portion 32 of the prevention member 30 (recess 31) is provided on the side opposite the supply side of the insulating paper P with respect to the rotating cylinder 10, thereby further enhancing the effect of preventing the insulating paper P from falling out.

[0038] Although the insulating paper P is sandwiched in the clamping opening 11, it is not clamped in the clamping opening 11. For example, if the contact portion 32 is provided near the edge of the recess 31 on the support base 20 side where the gap G is widest, the insulating paper P will hit the contact portion 32 when it is not caught in the clamping opening 11, and the insulating paper P will easily fall out of the clamping opening 11 due to friction between the contact portion 32 and the insulating paper P.

[0039] In contrast, in the insulating paper winding mechanism 100, as described above, the contact portion 32 is provided on the side opposite the supply side of the insulating paper P. That is, the contact portion 32 is provided at a position where the rotating cylinder 10 has rotated approximately 180° or more, so that the insulating paper P is caught on the edge of the clamping opening 11 (see FIG. 5D) and is guided into the gap G so that the insulating paper P is in close contact with the outer circumferential surface of the rotating cylinder 10, thereby preventing the insulating paper P from slipping out of the clamping opening 11 due to friction with the contact portion 32.

[0040] Furthermore, in the insulating paper winding mechanism 100 according to the first embodiment, as described above, the contact portion 32 has a flat surface 321, and the flat surface 321 is configured to come into contact with the rotating shell 10. That is, the portion of the contact portion 32 that comes into contact with the rotating shell 10 is a flat surface. For example, when the contact portion between the contact portion 32 and the rotating shell 10 is a curved surface, the contact area with the insulating paper P increases when winding the insulating paper P, compared to when the contact portion is a flat surface, and therefore the frictional force also increases, and there is a risk that the insulating paper P will come out of the clamping opening 11. In contrast, the insulating paper winding mechanism 100 has a flat surface 321 as a contact portion with the rotating cylinder 10, so that the contact area with the insulating paper P is kept to a minimum, and the generation of frictional force can be suppressed.

[0041] In the above, an example has been described in which the prevention members 30 are provided at multiple locations including both ends and the middle part of the rotating shell 10, but the present invention is not limited to this. It is sufficient that the prevention members 30 are provided at least at both ends (two locations) of the rotating shell 10.

[0042] (Embodiment 2) Fig. 6 is a cross-sectional view showing the configuration of the rotating cylinder 10 of the insulating paper winding mechanism 100 according to embodiment 2. For ease of explanation, Fig. 6 shows a state in which the insulating paper P is supplied from the one side and passes through the clamping opening 11 of the rotating cylinder 10. In Fig. 6, the broken line indicates the insulating paper P.

[0043] As in the first embodiment, the rotating cylinder 10 has a cylindrical shape and extends in a direction perpendicular to the supply direction of the insulating paper P. The rotating cylinder 10 also has a clamping opening 11 that clamps an end of the insulating paper P supplied from the one side, and the clamping opening 11 is slit-shaped. The rotating cylinder 10 rotates while clamping the end of the insulating paper P, and wraps the insulating paper P around its outer circumferential surface.

[0044] In the insulating paper winding mechanism 100 according to the second embodiment, the gap between the edges of the clamping opening 11 is formed so as to become wider as it approaches the outside of the rotating cylinder 10. That is, since the clamping opening 11 is formed over the entire length of the rotating cylinder 10, the rotating cylinder 10 has two corresponding ends in the circumferential direction, and the end faces 111, 112 relating to both ends face each other. The gap between the end faces 111, 112 becomes narrower as it approaches the inside of the rotating cylinder 10 from the outside.

[0045] With the above-described configuration, in the insulating paper winding mechanism 100 according to the second embodiment, the task of passing the insulating paper P through the clamping opening 11 before the rotating cylinder 10 starts to rotate is facilitated.

[0046] The same parts as those in the first embodiment are given the same reference numerals and detailed description thereof will be omitted.

[0047] (Embodiment 3) Fig. 7 is a cross-sectional view showing the configuration of the rotating cylinder 10 of the insulating paper winding mechanism 100 according to embodiment 3. For ease of explanation, Fig. 7 shows a state in which the insulating paper P is supplied from the one side and passes through the clamping opening 11 of the rotating cylinder 10. In Fig. 7, the insulating paper P is indicated by a dashed line.

[0048] As in the first embodiment, the rotating cylinder 10 has a cylindrical shape and extends in a direction perpendicular to the supply direction of the insulating paper P. The rotating cylinder 10 also has a clamping opening 11 that clamps an end of the insulating paper P supplied from the one side, and the clamping opening 11 is slit-shaped. The rotating cylinder 10 rotates while clamping the end of the insulating paper P, and wraps the insulating paper P around its outer circumferential surface.

[0049] In the insulating paper winding mechanism 100 according to the third embodiment, the clamping opening 11 is formed to penetrate the rotating cylinder 10 from the inside to the outside at an angle in the rotation direction relative to the radial direction of the rotating cylinder 10. Therefore, the clamping opening 11 is formed such that the inner opening 114 is shifted downstream along the circumferential direction of the rotating cylinder 10 in the rotation direction of the rotating cylinder 10 compared to the outer opening 113. Therefore, the insulating paper P is wound in a state in which the part of the insulating paper P inside the rotating cylinder 10 that is clamped by the clamping opening 11 (hereinafter referred to as the clamped part of the insulating paper P) is close to the inner wall side of the rotating cylinder 10, and the clamped part of the insulating paper P is prevented from being folded toward the rotation center O of the rotating cylinder 10.

[0050] Due to the above-described configuration, in the roll of insulating paper P obtained by the insulating paper winding mechanism 100 of embodiment 3, the sandwiched portion of the insulating paper P is not bent toward the center of the roll, and does not interfere with the work of passing the electric wire for the transformer inside the roll of insulating paper P, thereby improving workability.

[0051] The same parts as those in the first embodiment are given the same reference numerals and detailed description thereof will be omitted.

[0052] The technical features (constituent elements) described in the first to third embodiments can be combined with each other, and by combining them, new technical features can be arrived at. The embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. The scope of the present invention is defined by the claims, not by the above meaning, and is intended to include all modifications within the scope and meaning equivalent to the claims.

[0053] The matters described in each embodiment can be combined with each other. In addition, the independent claims and dependent claims described in the claims can be combined with each other in any and all combinations regardless of the citation format. Furthermore, the claims use a format in which a claim cites two or more other claims (multiple claim format), but this is not limited to this. The claims may also be written in a format in which a multiple claim cites at least one other multiple claim (multi-multi claim). [Explanation of symbols]

[0054] 10 rotating cylinder, 11 clamping opening, 20 support base, 21 support surface, 30 prevention member, 32 contact portion, 50 biasing member, 100 insulating paper winding mechanism, 113 outer opening, 114 inner opening, 321 flat surface, G gap, P insulating paper

Claims

1. An insulating paper winding mechanism that winds insulating paper that covers a transformer wire into a cylindrical shape, a rotating cylinder that rotates while pinching an end of the insulating paper and winds the insulating paper around its outer surface; a prevention member for preventing the insulating paper from coming off the rotating cylinder; An insulating paper winding mechanism.

2. The rotating cylinder is a clamping opening formed along the length direction for clamping an end of the insulating paper that is supplied, The insulating paper winding mechanism according to claim 1 , wherein the preventing member has a contact portion that contacts the rotating cylinder on a side opposite to a side on which the insulating paper is supplied.

3. the prevention member surrounds the rotating cylinder from the opposite side, and the supply side of the insulating paper is open, 3. The insulating paper winding mechanism according to claim 2, wherein the gap between the rotating cylinder and the preventing member becomes narrower as it approaches the contact portion.

4. The insulation paper winding mechanism according to claim 2 , wherein the contact portion has a flat surface that contacts the rotating cylinder.

5. 2. The insulating paper winding mechanism according to claim 1, wherein the prevention members are disposed at least on both ends of the rotating cylinder.

6. a support table having a support surface for supporting the insulating paper and supplying the insulating paper to the rotating cylinder; The insulating paper winding mechanism according to claim 2, wherein the rotating cylinder is in contact with the contact portion at a predetermined position within its outer surface over a rotation angle range of 180° to 300° based on the position where the rotating cylinder intersects with a plane including the support surface.

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