Insulating paper winding device and insulating paper winding method

Abstract

To provide an insulating paper winding device and an insulating paper winding method that can automate the production of a roll of insulating paper for a transformer.SOLUTION: The insulating paper winding device winds insulating paper that covers a transformer wire into a cylindrical shape, and includes: a rotating cylinder 10 that rotates while pinching the end of the insulating paper to wind the insulating paper around its outer surface; a guide section 70 that guides the insulating paper to the rotating cylinder 10; and a movement mechanism that moves the guide section 70 between a first position L1 close to the rotating cylinder 10 and a second position L2 that is farther from the rotating cylinder 10 than the first position L1.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an insulating paper winding device and an insulating paper winding method. [Background technology]

[0002] The manufacturing process of a transformer includes, for example, a winding process in which an electric wire coated with insulating paper is wound to form 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 a live part of the transformer, a lead wire is led out from the coil in the winding process (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, insulating paper wound into a cylindrical shape (hereinafter referred to as a wound body) is used. However, the process of manufacturing the wound body of insulating paper is performed manually, which has problems such as 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 as its object to provide an insulating paper winding device and an insulating paper winding method that can automate the production of a roll of insulating paper for a transformer. [Means for solving the problem]

[0006] The insulating paper winding device of the present invention is an insulating paper winding device that winds insulating paper that covers a transformer wire into a cylindrical shape, and is equipped with a rotating cylinder that rotates while clamping the end of the insulating paper to wrap the insulating paper around its outer surface, a guide unit that guides the insulating paper to the rotating cylinder, and a moving mechanism that moves the guide unit between a first position close to the rotating cylinder and a second position farther from the rotating cylinder than the first position.

[0007] The insulating paper winding method of the present invention is an insulating paper winding method for winding insulating paper into a cylindrical shape using an insulating paper winding device that has a rotating cylinder that clamps the end of the insulating paper that covers a transformer wire and rotates to wrap the insulating paper around its outer surface, and the method comprises moving a guide section that guides the insulating paper to the rotating cylinder from a second position away from the rotating cylinder to a first position that is closer to the rotating cylinder than the second position, supplying the insulating paper to the rotating cylinder via the guide section, returning the guide section to the second position, and rotating the rotating cylinder. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide an insulating paper winding device and an insulating paper winding method that can automate the production of a roll of insulating paper for a transformer. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of an insulating paper winding device according to an embodiment of the present invention. [Figure 2] 2 is a perspective view illustrating the arrangement of a rotary cylinder, a rotary drive unit, a holding table, and a removal mechanism of the insulating paper winding device according to the present embodiment. FIG. [Figure 3] 2 is a longitudinal cross-sectional view showing the main configuration of a holder for an insulating paper winding device according to the present embodiment. FIG. [Figure 4] 2 is a perspective view showing a guide portion and a movement mechanism of the insulating paper winding device according to the embodiment. FIG. [Figure 5] 5A and 5B are explanatory views illustrating a first position and a second position of a guide portion. [Figure 6] 5A and 5B are explanatory diagrams illustrating the operation of the insulating paper winding device according to the embodiment winding insulating paper. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will now be described with reference to the drawings showing embodiments thereof.

[0011] The insulating paper winding device according to this embodiment manufactures a wound insulating paper body by winding insulating paper, which covers an electric wire for a transformer, into a cylindrical shape, for example.

[0012] 1 is a perspective view of an insulating paper winding device 100 according to this embodiment. The insulating paper winding device 100 includes a rotating cylinder 10 that rotates around an end of insulating paper P (described later) and wraps the insulating paper P around its outer surface, a rotation drive unit 40 that rotates the rotating cylinder 10 about its axis, a holder 60 that holds the rotating cylinder 10, a guide unit 70 that guides the insulating paper P to the rotating cylinder 10, a movement mechanism 80 that moves the guide unit 70 toward and away from the rotating cylinder 10, a removal mechanism 90 that removes the roll of insulating paper P wound around the rotating cylinder 10 from the rotating cylinder 10, and a control unit 300.

[0013] The rotating cylinder 10, the rotation drive unit 40, the holding table 60, the guide unit 70, the moving mechanism 80 and the removal mechanism 90 are attached to a frame F, and the rotation drive unit 40, the holding table 60, the moving mechanism 80 and the removal mechanism 90 are controlled by a control unit 300.

[0014] In the insulating paper winding device 100, bobbin-wound insulating paper P is set in an insulating paper P supply unit 20 having a plate-shaped roller whose ends are supported by two support walls 200 arranged opposite each other, and the insulating paper P from the supply unit 20 is sent to the rotating cylinder 10 side via a guide unit 70 by the rotation of the roller. The rotating cylinder 10 is rotated by a rotation drive unit 40, so that the insulating paper P is wound onto the outer surface of the rotating cylinder 10, and the wound roll of insulating paper P is removed from the rotating cylinder 10 by a removal mechanism 90.

[0015] Figure 2 is a perspective view illustrating the arrangement of the rotating cylinder 10, rotation drive unit 40, holder 60, and removal mechanism 90 of the insulating paper winding device 100. For convenience, parts other than the rotating cylinder 10, rotation drive unit 40, holder 60, and removal mechanism 90 are not shown in Figure 2. In Figure 2, the insulating paper P is indicated by a dashed line, and the supply direction of the insulating paper P is indicated by an arrow.

[0016] 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 width direction of the insulating paper P. The rotating cylinder 10 is made of, for example, metal, and the length of the rotating cylinder 10 is longer than the width of the insulating paper P.

[0017] The rotating cylinder 10 also has a clamping opening 11 that clamps the end of the insulating paper P supplied from the guide section 70 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 its outer circumferential surface to form a cylindrical shape.

[0018] A rotation drive unit 40 is provided at one end of the rotating shell 10. The rotation drive unit 40 supports the rotating shell 10 and rotates the rotating shell 10 about its axis. The rotation drive unit 40 includes two bearing units 41 that rotatably support the ends of the rotating shell 10, and a servo motor (not shown) that rotates the rotating shell 10 forward or backward.

[0019] Each bearing portion 41 is substantially disk-shaped and has a through hole into which the rotating shell 10 is fitted, and the two bearing portions 41 are provided at a predetermined distance in the axial direction of the rotating shell 10. That is, the two bearing portions 41 are fixed to the frame F with one end of the rotating shell 10 passing through them. The two bearing portions 41 rotatably hold one end of the rotating shell 10. A belt 42, for example, is endlessly wound around the rotating shell 10 between the two bearing portions 41 and the rotor (pulley) of the servo motor. The servo motor is drive-controlled by the control portion 300, and the rotation of the servo motor is transmitted to the rotating shell 10 via the belt 42.

[0020] A holding base 60 is disposed on the opposite side of the guide portion 70 relative to the rotating barrel 10 in the radial direction of the rotating barrel 10. The holding base 60 is provided with a plurality of prevention members 30. The prevention members 30 prevent the insulating paper P from slipping out of the clamping opening 11 when the rotating barrel 10 rotates.

[0021] Figure 3 is a vertical cross-sectional view showing the main configuration of the holding table 60 of the insulating paper winding device 100. For convenience, Figure 3 also shows the rotating cylinder 10 and the tip of the guide portion 70. The arrow in Figure 3 indicates the rotation direction of the rotating cylinder 10.

[0022] When the rotating cylinder 10 rotates and the insulating paper P is wound around it, the holding table 60 moves toward the rotating cylinder 10, and the preventing member 30 comes into contact with the rotating cylinder 10. When the winding of the insulating paper P is complete, the holding table 60 moves away from the rotating cylinder 10, and the preventing member 30 comes into a non-contact state where it is not in contact with the rotating cylinder 10. Figure 2 illustrates the non-contact state of the preventing member 30, and Figure 3 illustrates the contact state of the preventing member 30.

[0023] The holding base 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 frame F, and a holding round rod 64 that passes through and holds the multiple prevention members 30.

[0024] The accommodation section 61 is made of a metal plate and has an L-shape in vertical cross section. The accommodation section 61 extends along the length of the rotating shell 10. Plate-shaped side walls 62 are erected on both edge portions of the accommodation section 61. The two side walls 62 are arranged opposite each other and hold both ends of a 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 accommodated inside the accommodation section 61, and the plurality of preventing members 30 are arranged side by side at equal intervals along the length of the rotating shell 10, i.e., along the length of the holding round bar 64. Spacers 65 extending along the length of the rotating shell 10 are disposed between adjacent preventing members 30, and both ends of the spacers 65 are fixed to the preventing members 30.

[0025] The preventing member 30 is an upright, roughly rectangular, thick plate-like member that forms a C-shape that is open in the opposite direction. That is, the preventing member 30 has a recessed portion 31 that is open on the rotating shell 10 side (the lower plate portion 73 side), and surrounds the rotating shell 10 in the circumferential direction. The inner surface of the recessed portion 31 is a curved surface with a diameter larger than the outer diameter of the rotating shell 10, and in the contact state, the rotating shell 10 is disposed within the recessed portion 31 of the preventing member 30. The multiple preventing members 30 are arranged side by side in the thickness direction. The multiple preventing members 30 are arranged at multiple locations on the rotating shell 10, including the ends and middle portion.

[0026] A contact portion 32 that comes into contact with the outer circumferential surface of the rotating shell 10 in the contact state is formed in the upper portion of the inner surface of the recess 31 on the side opposite to the open side. 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 that comes into contact with the outer circumferential surface of the rotating shell 10 (see the dashed ellipse in FIG. 3).

[0027] Furthermore, the prevention member 30 has through holes 34 formed in the corners near the contact portions 32, penetrating the prevention member 30 in the thickness direction. The through holes 34 are oval in vertical cross section. A holding round rod 64 passes loosely through the through holes 34 of each prevention member 30.

[0028] Furthermore, the opposite side surface of the preventing member 30 opposite the recess 31 faces the accommodation portion 61, and a holding rod 33 is provided on the opposite side surface to hold the preventing member 30 in the accommodation portion 61. The holding rod 33 protrudes from the opposite side surface, with one end fixed to the opposite side surface of the preventing member 30 and the other end loosely passing through a through hole (not shown) formed in the accommodation portion 61.

[0029] Between the preventing member 30 and the accommodating portion 61, there is interposed a biasing member 50 that biases the preventing member 30 toward the rotating barrel 10. The biasing member 50 is, for example, a coil 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 barrel 10, and such movement of the preventing member 30 is guided by the through hole 34 and the retaining rod 33.

[0030] As described above, the rotating barrel 10 is held by the rotation drive unit 40, while the preventing member 30 is pressed toward the rotating barrel 10 by the biasing member 50, so that the outer surface of the rotating barrel 10 comes into contact with the contact portion 32 of the preventing member 30.

[0031] 3, the gap between the edges of the clamping opening 11 is formed to become wider as it approaches the outside of the rotating shell 10. In other words, the dimension of the clamping opening 11 in the circumferential direction of the rotating shell 10 is smaller on the inner peripheral surface side of the rotating shell 10 than on the outer peripheral surface side. As described above, the clamping opening 11 is formed over the entire length of the rotating shell 10, so that the rotating shell 10 has two corresponding ends in the circumferential direction, with the end faces 111 and 112 at both ends facing each other. The distance between the end faces 111 and 112 becomes narrower from the outside to the inside of the rotating shell 10.

[0032] In this case, in the insulating paper winding device 100, the curvature of the inner surface (recess 31) of the preventing member 30 is adjusted appropriately, and the gap G between the rotating cylinder 10 and the preventing member 30 is gradually narrowed from the edge of the recess 31 on the guide portion 70 side along the rotation direction of the rotating cylinder 10 as it approaches the contact portion 32.

[0033] As shown in FIG. 2, a removal mechanism 90 is provided above the rotary barrel 10 and the holder 60. The removal mechanism 90 has a sliding part 93 that slides on the outer peripheral surface of the rotating barrel 10, a first rail 92 that guides the movement of the sliding part 93, a movement drive part 91 that is driven and controlled by the control part 300 to move the sliding part 93, and a second rail 94 that guides the movement of the movement drive part 91.

[0034] The first rail 92 has an H-shaped cross section, and the second rail 94 is cylindrical. The first rail 92 and the second rail 94 extend along the axial direction of the rotating barrel 10 and are parallel to each other. Both ends of the first rail 92 and the second rail 94 are fixed to the frame F.

[0035] The sliding portion 93 has a through hole 935 into which the rotating shell 10 is fitted, and has a substantially rectangular abutment plate portion 932 that is perpendicular to the axial direction of the rotating shell 10, and a rectangular connecting plate portion 931 that is connected to the upper end of the abutment plate portion 932 and extends in the thickness direction of the abutment plate portion 932. The through hole 935 has a diameter that is slightly larger than the outer diameter of the rotating shell 10, and the rotating shell 10 is fitted into the abutment plate portion 932 so as to be able to slide on the outer peripheral surface of the rotating shell 10.

[0036] When the winding of the insulating paper P is completed, the sliding part 93 slides on the outer peripheral surface of the rotating cylinder 10, pushes the end face of the wound insulating paper P wound on the outer peripheral surface of the rotating cylinder 10 to the other end side of the rotating cylinder 10, and removes the wound insulating paper from the rotating cylinder 10.

[0037] Furthermore, two connection blocks 934 that connect the sliding portion 93 to the first rail 92 are attached to the upper surface of the connection plate portion 931. The connecting block 934 has a rectangular parallelepiped shape and has an engaging portion at its upper end. The engaging portion of the connecting block 934 engages with both recesses of the first rail 92 that face each other in the horizontal direction. As a result, the sliding portion 93 is suspended from the first rail 92 via the connecting block 934 and moves along the first rail 92, i.e., in the axial direction of the rotating barrel 10.

[0038] The travel drive unit 91 has an outer fitting portion 911 with an elongated hole that is circular in cross section, and the second rail 94 is fitted onto the outer fitting portion 911. The elongated hole of the outer fitting portion 911 has a diameter that is slightly larger than the outer diameter of the second rail 94. The travel drive unit 91 also has a servo motor built in, and slides on the outer circumferential surface of the second rail 94.

[0039] That is, with the second rail 94 fitted into the outer fitting portion 911, the moving drive unit 91 slides on the outer surface of the second rail 94 in the axial direction of the second rail 94, i.e., in the axial direction of the rotating cylinder 10, by the control unit 300 controlling the drive of the servo motor.

[0040] Furthermore, the moving drive unit 91 is connected to a contact plate portion 932 of the sliding portion 93 via a rectangular connecting plate 912. Therefore, when the moving drive unit 91 moves on the outer peripheral surface of the second rail 94, the sliding portion 93 also moves along the outer peripheral surface of the rotating shell 10. That is, while the moving drive unit 91 moves along the outer peripheral surface of the second rail 94, it moves the sliding portion 93 along the outer peripheral surface of the rotating shell 10, and pulls out the roll of insulating paper P that has been wound around the outer peripheral surface of the rotating shell 10 from the rotating shell 10.

[0041] The guide section 70 is disposed a short distance away from the rotating shell 10, between the insulating paper P supply section 20 and the rotating shell 10, and has a lower plate section 73 on which the insulating paper P is placed, and an upper plate section 74 that covers the insulating paper P on the lower plate section 73. The guide section 70 is moved by a moving mechanism 80 to a position close to the rotating shell 10 (hereinafter referred to as the first position), and also to a position away from the rotating shell 10 (hereinafter referred to as the second position).

[0042] Fig. 4 is a perspective view showing the guide unit 70 and the movement mechanism 80 of the insulating paper winding device 100. For convenience, Fig. 4 also shows the rotating cylinder 10 and the supply unit 20 for insulating paper P, and does not show any parts other than the rotating cylinder 10, the supply unit 20, the guide unit 70, and the movement mechanism 80. The guide unit 70 will be described in detail below with reference to Figs. 4 and 3.

[0043] The lower plate portion 73 is made of, for example, a metal plate and has a generally rectangular plate shape that extends in a direction perpendicular to the supply direction of the insulating paper P (the direction of the arrow in Figure 2). The lower plate portion 73 also has a flat support surface 731 that supports the insulating paper P. The rotating shell 10 is disposed at a position that intersects with a plane that includes the support surface 731 of the lower plate portion 73. More specifically, the end of the lower plate portion 73 on the supply unit 20 side is inclined lower than the end on the rotating shell 10 side, and the lower plate portion 73 is disposed so that the clamping opening 11 of the rotating shell 10 is located on an extension of the lower plate portion 73 (see the dashed line in Figure 3).

[0044] The upper plate portion 74 is made of, for example, a metal plate, and has an opposing plate 741 disposed at a predetermined distance opposite the lower plate portion 73. Similar to the lower plate portion 73, the opposing plate 741 is inclined so that the end portion on the supply section 20 side is lower than the end portion on the rotating cylinder 10 side. The upper plate portion 74 has an edge portion on the rotating shell 10 side bent upward to form a bent portion 71 (contact portion). For example, the bent portion 71 is bent perpendicular to the opposing plate 741. Therefore, the tip portion of the lower plate portion 73 on the rotating shell 10 side protrudes further toward the rotating shell 10 than the tip portion of the upper plate portion 74 on the rotating shell 10 side. The upper plate portion 74 is also bent upward at its end on the supply portion 20 side, which is opposite to the bent portion 71 (see FIG. 4).

[0045] Furthermore, the upper plate portion 74 has both edge portions 72 bent upward in the length direction of the bent portion 71, i.e., in the width direction of the insulating paper P. For example, the edge portions 72 are bent perpendicular to the opposing plate 741. Furthermore, two internal fitting rods 721 are attached to the end of each edge portion 72 on the supply unit 20 side. The internal fitting rods 721 are fitted into guide holes 201 (described later) of the support wall 200. The internal fitting rods 721 extend outward from the support wall 200 in the thickness direction of the edge portions 72.

[0046] Support walls 200 are erected near both edge portions 72 of the upper plate portion 74 in the width direction of the insulating paper P, and the two support walls 200 face each other. Each support wall 200 is formed with a guide hole 201 at a position corresponding to the guide portion 70, for guiding the movement of the guide portion 70. The guide hole 201 is an ellipse extending in a direction away from the rotating shell 10. More specifically, the guide hole 201 is formed at the same inclination as the lower plate portion 73 and the opposing plate 741. In other words, the guide hole 201 is formed so that it becomes higher the closer it is to the rotating shell 10.

[0047] Two internal fitting rods 721 on each edge portion 72 of the upper plate portion 74 pass through the corresponding guide holes 201 and protrude to the outside of the support wall 200, and each internal fitting rod 721 has a slip-out prevention portion at its end.

[0048] Therefore, when the guide part 70 is moved back and forth between the first position and the second position by the movement mechanism 80, the movement is guided by the guide hole 201 and the inner fitting rod 721, and moves according to the inclination of the guide hole 201. More specifically, the guide part 70 moves toward and away from the rotating barrel 10 along an extension line of the lower plate part 73 (see the dashed line in FIG. 3).

[0049] The guide section 70 is configured as described above, and the insulating paper P is interposed between the lower plate section 73 and the upper plate section 74 (opposing plate 741). The insulating paper P sent from the insulating paper P supply section 20 passes between the lower plate section 73 and the upper plate section 74 (opposing plate 741), moves on the support surface 731 of the lower plate section 73, and is supplied to the rotating cylinder 10. In other words, the supply of the insulating paper P is guided by the lower plate section 73 and the upper plate section 74.

[0050] The movement mechanism 80 is disposed between the guide section 70 and the supply section 20 for the insulating paper P, and moves the guide section 70 back and forth between the first position and the second position as described above.

[0051] The movement mechanism 80 includes a band-shaped mounting plate 84 that is horizontally stretched between the two support walls 200, and an air cylinder that is attached to the underside of the mounting plate 84. More specifically, the movement mechanism 80 includes a cylindrical cylinder tube 81 and a piston rod 82 that has one end connected to a piston in the cylinder tube 81 and moves back and forth in the supply direction of the insulating paper P (the direction of the arrow in FIG. 2). The other end of the piston rod 82 is fixed to a pressing plate 83 that presses the guide section 70 toward the rotating shell 10. That is, the pressing plate 83 abuts against the ends of the upper plate 74 and the lower plate 73 that face the supply section 20, pressing the upper plate 74 and the lower plate 73 toward the rotating shell 10.

[0052] In other words, when the piston rod 82 advances toward the rotating barrel 10 due to the air pressure control of the control unit 300, the guide unit 70 moves from a second position away from the rotating barrel 10 to a first position closest to the rotating barrel 10, and when the piston rod 82 retracts, the guide unit 70 returns to the second position.

[0053] Figure 5 is an explanatory diagram illustrating the first and second positions of the guide portion 70. Figure 5A shows the guide portion 70 in the second position L2, and Figure 5B shows the guide portion 70 in the first position L1. For ease of explanation, Figure 5 only shows the guide portion 70 and the rotating barrel 10.

[0054] As described above, when moving from the second position L2 to the first position L1, the guide portion 70 is guided by the guide hole 201 of the plate-shaped support wall 200, and therefore moves toward the rotating barrel 10 along the extension line of the lower plate portion 73 at the second position L2 (in the direction of the arrow in Figure 5) according to the inclination of the guide hole 201.

[0055] Before the guide unit 70 starts to move from the second position L2 to the first position L1, the control unit 300 controls the rotation drive unit 40 in advance so that the clamping opening 11 (rotation angle) of the rotatable barrel 10 faces slightly downward in accordance with the inclination of the lower plate unit 73. Therefore, when the guide unit 70 starts to move from the second position L2 to the first position L1, the extension line of the lower plate unit 73 faces the clamping opening 11 of the rotatable barrel 10, as shown in FIG. 5A.

[0056] Therefore, when the guide portion 70 moves from the second position L2 to the first position L1, the tip of the lower plate portion 73 passes through the clamping opening 11 and is inserted into the inside of the rotating shell 10 (see FIG. 5B ). At this time, the lower end surface 112 of the clamping opening 11 can guide the tip of the lower plate portion 73 into the inside of the rotating shell 10. The tip of the lower plate portion 73 continues to move into the rotating shell 10 until the bent portion 71 of the upper plate portion 74 abuts against the outer peripheral surface of the rotating shell 10. The movement of the guide portion 70 is completed when the bent portion 71 of the upper plate portion 74 abuts against the outer peripheral surface of the rotating shell 10. In other words, when the bent portion 71 of the upper plate portion 74 abuts against the outer peripheral surface of the rotating shell 10, the guide portion 70 is located at the first position L1, and the tip of the lower plate portion 73 is located near the clamping opening 11 of the rotating shell 10.

[0057] 5B , when the guide portion 70 is located at the first position L1, the tip of the lower plate portion 73 is inserted into the rotating shell 10, and the bent portion 71 of the upper plate portion 74 abuts against the rotating shell 10. In this manner, with the tip of the lower plate portion 73 inserted into the rotating shell 10, the control portion 300 controls the rollers of the supply portion 20 to start supplying the insulating paper P, and the insulating paper P moves on the support surface 731 of the lower plate portion 73 and is fed into the rotating shell 10.

[0058] 6 is an explanatory diagram illustrating the operation of the insulating paper winding device 100 according to this embodiment to wind the insulating paper P. The operation of winding the insulating paper P is performed in the order shown in FIGS. 6A to 6D. The operation of winding the insulating paper P will be described below with reference to FIGS. 5 and 6.

[0059] First, the control unit 300 controls the rotation drive unit 40 so that the clamping opening 11 of the rotatable barrel 10 faces slightly downward in accordance with the inclination of the lower plate portion 73. Next, the control unit 300 controls the movement mechanism 80 to move the guide portion 70 from the second position L2 to the first position L1 (see FIG. 5). At this time, the holding base 60 moves toward the rotatable barrel 10, and the prevention member 30 comes into contact with the rotatable barrel 10.

[0060] 6A, when the guide portion 70 moves to the first position L1, the control portion 300 controls the rollers of the supply portion 20 to supply the insulating paper P to the rotating shell 10. The insulating paper P passes between the lower plate portion 73 and the upper plate portion 74 (opposing plate 741) and moves on the support surface 731 of the lower plate portion 73, and the end of the insulating paper P enters the inside of the rotating shell 10 through the clamping opening 11 and proceeds further inside the rotating shell 10 from the tip of the lower plate portion 73 (see the dashed arrow in FIG. 6A).

[0061] Next, the control unit 300 controls the movement mechanism 80, and the guide unit 70 returns to the second position L2. Even in this case, the end of the insulating paper P remains positioned inside the rotating cylinder 10 (see FIG. 6B). Thereafter, the control unit 300 controls the rotation drive unit 40, and the rotation drive unit 40 rotates the rotating cylinder 10 in the forward direction (see the solid arrow in FIG. 6C).

[0062] As the rotating shell 10 rotates, the end of the insulating paper P is clamped in the clamping opening 11, and the insulating paper P is pulled toward the rotating shell 10 (FIG. 6C). The insulating paper P is dragged by the rotating shell 10 and enters the gap G from the edge of the recess 31 on the lower plate portion 73 side (FIG. 6D). As described above, the gap G gradually narrows as the insulating paper P approaches the contact portion 32, so the insulating paper P is guided by the gap G and curves along the outer peripheral surface of the rotating shell 10. Therefore, the air between the outer peripheral surface of the rotating shell 10 and the insulating paper P is pushed out, and the outer peripheral surface of the rotating shell 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.

[0063] As the rotating shell 10 rotates further, the insulating paper P becomes interposed between the contact portion 32 of the preventing 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 as the rotation of the rotating shell 10 progresses further, the insulating paper P remains clamped between the contact portion 32 and the rotating shell 10, and therefore the insulating paper P does not slip out through the clamping opening 11.

[0064] Furthermore, even from the second turn onwards, 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 paper P is pushed out and the insulating paper P is tightly adhered to each other. As a result, a roll of insulating paper P with a regular shape can be obtained.

[0065] As described above, as the rotation speed of the rotating cylinder 10 increases, i.e., as the thickness of the wound insulating paper P increases, the preventing member 30 moves away from the rotating cylinder 10, but the preventing member 30 is urged toward the rotating cylinder 10 by the urging member 50, so that the insulating paper P can be maintained in a clamped state between the contact portion 32 and the rotating cylinder 10.

[0066] When the winding of the insulating paper P is completed in this manner, a roll of the insulating paper P is produced on the outer circumferential surface of the rotating cylinder 10. At this time, the control unit 300 rotates the rotation drive unit 40 in the reverse direction to loosen the adhesive strength between the rotating cylinder 10 and the innermost layer of the roll of insulating paper P.

[0067] Next, the control unit 300 controls the drive of the movement drive unit 91 to move it on the outer circumferential surface of the second rail 94, causing the sliding unit 93 to slide on the outer circumferential surface of the rotating cylinder 10 in a direction away from the rotation drive unit 40, and the roll of insulating paper P wound on the outer circumferential surface of the rotating cylinder 10 is pulled out from the rotating cylinder 10. In this way, the cylindrical roll of insulating paper P can be obtained.

[0068] Therefore, the insulating paper winding device 100 according to this embodiment can automate the production of a roll of transformer insulating paper P, thereby improving workability and productivity. After that, an electric wire for a transformer is passed inside the obtained roll of insulating paper P to cover the electric wire.

[0069] In the insulating paper winding device 100 of this embodiment, as described above, when winding the insulating paper P, the guide portion 70 is moved from the second position L2 to the first position L1 and brought closer to the rotating cylinder 10, so that the insulating paper P can be reliably guided into the clamping opening 11 of the rotating cylinder 10.

[0070] Furthermore, in the insulating paper winding device 100 of this embodiment, as described above, when the guide portion 70 is positioned at the first position L1, the tip of the lower plate portion 73 is inserted into the rotating cylinder 10, so that the insulating paper P is more reliably supplied into the rotating cylinder 10.

[0071] Furthermore, in the insulating paper winding device 100 of this embodiment, as described above, when the guide portion 70 is positioned at the first position L1, the bent portion 71 of the upper plate portion 74 abuts against the rotating cylinder 10, thereby increasing the accuracy in moving the guide portion 70 to the first position.

[0072] Furthermore, in the insulating paper winding device 100 according to this embodiment, as described above, the dimension of the clamping opening 11 in the circumferential direction of the rotating shell 10 is smaller on the inner peripheral surface side of the rotating shell 10 than on the outer peripheral surface side, so that of both end faces 111, 112 of the clamping opening 11, the upper end face 111 forms a slope that decreases toward the inside of the rotating shell 10, and the lower end face 112 forms a slope that increases toward the inside of the rotating shell 10. Therefore, when the tip end of the lower plate portion 73 is inserted into the inside of the rotating shell 10 through the clamping opening 11, the both end faces 111, 112 can guide the tip end of the lower plate portion 73 into the inside of the rotating shell 10.

[0073] Furthermore, in the insulating paper winding device 100 according to this embodiment, as described above, both side edges 72 are bent perpendicular to the opposing plate 741, which increases the strength of the plate-shaped upper plate portion 74.

[0074] Furthermore, in the insulating paper winding device 100 according to this embodiment, as described above, the edge portion of the upper plate portion 74 on the rotating cylinder 10 side is bent vertically upward to form the bent portion 71, thereby increasing the contact area between the bent portion 71 and the outer peripheral surface of the rotating cylinder 10, and more reliably positioning the guide portion 70 at the first position L1.

[0075] Furthermore, in the insulating paper winding device 100 of this embodiment, as described above, the contact portion 32 of the preventing 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 coming loose.

[0076] As described above, in the insulating paper winding device 100 according to this embodiment, 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, if 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, which may cause the insulating paper P to slip out of the clamping opening 11. In contrast, the insulating paper winding device 100 has a flat surface 321 at the contact portion with the rotating cylinder 10, so the contact area with the insulating paper P is kept to a minimum, and the generation of frictional force can be suppressed.

[0077] In the above, an example has been described in which the prevention members 30 are disposed at a plurality of locations including both end portions and the middle portion of the rotating shell 10, but the present invention is not limited to this. It is sufficient that the prevention members 30 are disposed at least at both end portions (two locations) of the rotating shell 10.

[0078] In addition, although the above description has been given of the case where both edge portions 72 are bent upward, the present invention is not limited to this, and only one of the edge portions 72 may be bent upward.

[0079] Furthermore, in the above description, an example has been given in which the tip of the lower plate portion 73 is inserted into the rotating barrel 10 when the guide portion 70 is located at the first position L1, but the present invention is not limited to this. For example, when the guide portion 70 is located at the first position L1, the tip of the lower plate portion 73 may be configured to be interposed between the end faces 111, 112 of the clamping opening 11, or the tip of the lower plate portion 73 may be configured to contact the outer peripheral surface of the rotating barrel 10 so that the support surface 731 of the lower plate portion 73 is adjacent to the end face 112.

[0080] In the above description, an example has been given in which the edge of the upper plate portion 74 facing the rotating shell 10 is bent vertically upward to form the bent portion 71, but the present invention is not limited to this. The edge of the upper plate portion 74 facing the rotating shell 10 may be bent into a semicircular or circular shape in cross section. A separate member may be attached along the edge of the upper plate portion 74 facing the rotating shell 10. Furthermore, the bent edge of the upper plate portion 74 facing the rotating shell 10 may be omitted. A separate member may be attached to the underside of the tip of the lower plate portion 73, and this separate member may be configured to abut against the rotating shell 10.

[0081] The technical features (constituent elements) described in this embodiment can be combined with each other, and by combining them, new technical features can be conceived. The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. 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 meaning and scope of the claims.

[0082] The matters described in the embodiments can be combined with each other. Furthermore, the independent claims and dependent claims described in the claims can be combined with each other in any and all combinations, regardless of the reference format. Furthermore, while the claims use a format in which a claim references two or more other claims (multiple claim format), this is not limited to this format. A multiple claim (multi-multi claim) that references at least one other multiple claim may also be used. [Explanation of symbols]

[0083] 10: Rotating cylinder, 11: Nip, 70: Guide portion, 71: Bending portion (contact portion), 72: Edge portion, 73: Lower plate portion, 74: Upper plate portion, 80: Moving mechanism, 100: Insulating paper winding device, 200: Support wall, 300: Control portion, G: Gap, P: Insulating paper

Claims

1. An insulating paper winding device 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 winding the insulating paper around its outer surface; a guide portion that guides the insulating paper to the rotating cylinder; an insulating paper winding device including a movement mechanism that moves the guide portion between a first position close to the rotating cylinder and a second position farther from the rotating cylinder than the first position;

2. the rotating cylinder has a clamping opening formed along its length for clamping an end of the insulating paper that is supplied, the guide portion has a lower plate portion on which the insulating paper is placed, The insulating paper winding device according to claim 1 , wherein, at the first position, the leading end of the lower plate portion is inserted into the rotary cylinder through the clamping opening.

3. the guide portion has an upper plate portion that covers the insulating paper on the lower plate portion, The insulating paper winding device according to claim 2 , wherein the upper plate portion has a contact portion at a tip end thereof that contacts the rotary cylinder at the first position.

4. 4. The insulating paper winding device according to claim 3, wherein the peripheral edge of the upper plate portion is bent upward at the contact portion.

5. 5. The insulating paper winding device according to claim 2, wherein the size of the clamping opening in the circumferential direction of the rotating cylinder is smaller on the inner peripheral surface side of the rotating cylinder than on the outer peripheral surface side.

6. An insulating paper winding method for winding insulating paper into a cylindrical shape using an insulating paper winding device having a rotating cylinder that pinches an end of the insulating paper covering a transformer wire and rotates to wind the insulating paper onto its outer surface, the method comprising: a guide portion that guides the insulating paper to the rotating cylinder is moved from a second position that is distant from the rotating cylinder to a first position that is closer to the rotating cylinder than the second position; supplying insulating paper to the rotating cylinder via the guide portion; Returning the guide portion to the second position; The insulating paper winding method rotates the rotating cylinder.

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