Winding support device and installation method

Abstract

To provide a winding support device capable of preventing a winding from falling into a communicating groove when the winding is wound.SOLUTION: A winding support device 1 is detachable from a rotating device that rotates a transformer bobbin, in which adjacent grooves have communicating grooves formed in the partition walls in the circumferential direction, to wind a winding, and has a plate-shaped jig portion 31 arranged opposite the partition walls to block the communicating grooves.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a winding assist device and an installation method. [Background technology]

[0002] Conventionally, transformers have been used for the purpose of voltage or current transformation. A transformer may include an annular frame and multiple coils formed on the outer periphery of the frame. The multiple coils are aligned in the axial direction of the frame, and an insulating wall is interposed between adjacent coils over the entire circumference (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] 2020-188213 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned frame forms a coil by winding a wire around a groove that includes two insulating walls, and a communicating groove is formed between adjacent grooves so that the wire can be wound continuously between the adjacent grooves. The communicating groove extends along the insulating walls and penetrates the insulating walls obliquely. Therefore, when the winding of the wire in one groove is completed, the wire moves to the other adjacent groove via the communicating groove, and the winding of the wire in the other groove is continuously performed.

[0005] As the winding of the winding progresses, the height of the coil in the radial direction of the frame increases, and there is a risk that the winding will fall into the communicating groove. However, such a problem is not considered in Patent Document 1 and cannot be addressed.

[0006] The present invention has been made in consideration of the above circumstances, and has an object to provide a winding assist device that can prevent the winding from falling into the communicating groove when the winding is being wound. [Means for solving the problem]

[0007] The winding support device of the present invention is a winding support device that can be attached to and detached from a rotating device that winds a winding by rotating a transformer bobbin in which adjacent grooves have connecting grooves formed in the partition walls in the circumferential direction, the winding support device having a plate-shaped jig portion arranged opposite the partition walls to block the connecting grooves.

[0008] The mounting method of the present invention is a method for mounting a winding assistance device to a rotating device that winds a winding by rotating a transformer bobbin, in which a partition wall between grooves arranged side by side in the axial length direction has a connecting groove formed in the circumferential direction that connects the grooves, and a plate-shaped jig part is positioned opposite the partition wall so as to block the connecting groove. Effect of the Invention

[0009] According to the present invention, it is possible to provide a winding assist device that can prevent the winding from falling into the communicating groove when the winding is being wound. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a schematic perspective view of a coil bobbin as viewed from one direction. [Diagram 2] 2. FIG. 3 is a simplified, partially enlarged, vertical sectional view taken along line II-II in FIG. [Diagram 3] 1 is a perspective view of a winding assist device according to a first embodiment. FIG. [Figure 4] 2 is a perspective view showing a clamping section of the winding assist device according to the first embodiment. FIG. [Diagram 5] 5 is a longitudinal sectional view taken along line VV in FIG. 4. [Figure 6] 2 is a perspective view showing a holding portion of the winding assist device according to the first embodiment. FIG. [Figure 7] 1A to 1C are a front view, a side view, a rear view, a plan view, and a bottom view of a holding part. [Figure 8] FIG. 2 is a perspective view showing a prevention member of the winding assist device according to the first embodiment. [Figure 9]3A to 3C are a front view, a side view, a rear view, a plan view and a bottom view of a prevention member. [Figure 10] 13A and 13B are explanatory views for explaining a method of attaching the prevention member and the holding part after attaching the clamping part to the rotating device. [Figure 11] 13 is a perspective view showing a state in which the winding assist device has been completely attached to the rotating device. FIG. [Figure 12] 11 is a partial cross-sectional view showing a schematic state in which the winding assist device has been attached to the rotating device; FIG. [Figure 13] 13 is a partial cross-sectional view showing a cross section of a second groove after winding of the winding wire has been performed with the winding assist device attached to the rotating device. FIG. [Figure 14] FIG. 11 is a perspective view showing a prevention member of a winding assist device according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the present invention will be described with reference to the drawings showing an embodiment thereof.

[0012] (Embodiment 1) The winding assist device according to this embodiment is used, for example, in a rotating device that rotates a coil bobbin for a transformer to wind a winding.

[0013] 1 is a schematic perspective view of a coil bobbin 100 viewed from one direction. The coil bobbin 100 is made of resin and includes a frame 200 that is rectangular with rounded corners. The four corners of the frame 200 are curved in an arc shape.

[0014] For ease of explanation, in the following explanation, the axial direction of the frame 200 is defined as the front-rear direction, the direction parallel to the long sides of the frame 200 is defined as the up-down direction, and the direction parallel to the short sides of the frame 200 is defined as the left-right direction. That is, Fig. 1 is a schematic perspective view of the coil bobbin 100 viewed from the upper left.

[0015] FIG. 2 is a simplified, partially enlarged, vertical sectional view taken along line II-II in FIG.

[0016] A gutter 2d extending in the circumferential direction is formed on the outer peripheral surface of the frame body 200, and the gutter 2d is provided around the entire circumference of the frame body 200. Three walls 2a, 2b, and 2c protruding radially outward are formed at the bottom of the gutter 2d. The walls 2a, 2b, and 2c extend in the circumferential direction and are provided around the entire circumference of the frame body 200. The wall 2a is disposed on the rear side, the wall 2c is disposed on the front side, and the wall 2b is disposed between the walls 2a and 2c.

[0017] In other words, a first groove 3ad in which the winding is wound is formed between the wall 2a and the rear wall 2da of the trough 2d, a second groove 3ab in which the winding is wound is formed between the wall 2a and the wall 2b, a third groove 3bc in which the winding is wound is formed between the wall 2b and the wall 2c, and a fourth groove 3cd in which the winding is wound is formed between the wall 2c and the front wall 2db of the trough 2d. The winding is, for example, a copper wire.

[0018] That is, a first groove 3ad, a second groove 3ab, a third groove 3bc, and a fourth groove 3cd are arranged in this order in the axial direction on the outer circumferential surface of the frame body 200. The wall 2a corresponds to a partition wall between the first groove 3ad and the second groove 3ab, the wall 2b corresponds to a partition wall between the second groove 3ab and the third groove 3bc, and the wall 2c corresponds to a partition wall between the third groove 3bc and the fourth groove 3cd. Primary coils are provided in the first groove 3ad to the fourth groove 3cd of the frame body 200, and secondary coils are provided on the radially inner side of the frame body 200 and the radially outer side of the frame body 200, respectively.

[0019] The walls 2a, 2b, and 2c are provided at their upper sides with communicating grooves 20, 21, and 22, respectively. The communicating grooves 20, 21, and 22 communicate with adjacent grooves in the axial direction of the frame 200. That is, the communicating groove 20 communicates with the first groove 3ad and the second groove 3ab, the communicating groove 21 communicates with the second groove 3ab and the third groove 3bc, and the communicating groove 22 communicates with the third groove 3bc and the fourth groove 3cd. The communicating grooves 20, 21, and 22 have the same shape, and therefore, hereinafter, only the communicating groove 20 will be described, and descriptions of the communicating grooves 21 and 22 will be omitted.

[0020] The communication groove 20 of the wall 2a has a front wall 2aa (first wall) on the second groove 3ab side and a rear wall 2ab (second wall) on the first groove 3ad side. In other words, the communication groove 20 is formed in the upper wall 2a along the circumferential direction of the frame body 200, and the upper part of the wall 2a is divided into the front wall 2aa and the rear wall 2ab, and the front wall 2aa and the rear wall 2ab overlap in the thickness direction of the wall 2a. The thickness of the front wall 2aa and the rear wall 2ab decreases toward the tip. The communication groove 20 has one opening end 201 (inlet) opening to the first groove 3ad (see FIG. 1), and the other opening end 202 (outlet) opening to the second groove 3ab (see FIG. 12).

[0021] The upper side of the front wall 2aa slopes downward toward the right side. The lower side of the front wall 2aa extends left and right along the bottom of the gutter 2d. The rear wall 2ab has a rectangular shape extending left and right and is disposed so as to face the front wall 2aa. The rear wall 2ab and the front wall 2aa are separated by an appropriate length in the front-to-rear direction. A vertically extending side is formed at the right end of the front wall 2aa, and the upper side of the front wall 2aa is separated from the bottom of the gutter 2d.

[0022] The right end portion of the rear wall 2ab extends further to the right than the front wall 2aa and is continuous with the inclined surface 2ac. The inclined surface 2ac is inclined so that the right portion is located forward of the left portion. The front wall 2aa is not disposed in front of the right end portion of the rear wall 2ab and the inclined surface 2ac.

[0023] The bottom surface 2k between the front wall 2aa and the rear wall 2ab slopes downward toward the right, similar to the upper side of the front wall 2aa (see FIG. 12). That is, the left end of the bottom surface 2k is higher than the right end. The bottom surface 2k is longer in the left-right direction than the front wall 2aa. That is, the bottom surface 2k extends further to the right than the right end of the front wall 2aa and is connected to the lower side of the inclined surface 2ac. The upper right corner of the frame 200 is curved in an arc shape that protrudes radially outward when viewed from the front, and the bottom surface 2k extends in the tangent direction of the arc shape (see FIG. 12).

[0024] As described above, the first groove 3ad and the second groove 3ab are connected to each other by the communicating groove 20. Therefore, after the winding is wound in the first groove 3ad, the winding at the outermost position is guided by the communicating groove 20 and the inclined surface 2ac to the second groove 3ab, and reaches the bottom surface of the second groove 3ab, where the winding is wound.

[0025] For such a coil bobbin 100 (frame body 200), the winding support device 1 of embodiment 1 is detachably attached to a rotating device 300 (see Figure 12) that rotates the coil bobbin 100 to wind the winding, and prevents the winding from falling into the communicating grooves 20, 21, and 22 during winding, thereby preventing malfunctions.

[0026] 3 is a perspective view of the winding assist device 1 according to embodiment 1. The winding assist device 1 includes a prevention member 30 that prevents the winding from falling into the communicating grooves 20, 21, and 22 of the coil bobbin 100 during winding of the winding, a holding unit 40 that holds the prevention member 30, and a clamping unit 50 that is attached to a rotating device 300 and detachably holds the holding unit 40.

[0027] The prevention member 30 is fixed to the holding portion 40 with a bolt, and the holding portion 40 is clamped by the clamping portion 50 as described above, and the clamping portion 50 is fixed to the rotating device 300 with a bolt (see FIG. 10). For the sake of convenience, the rotating device 300 is not shown in FIG. 3.

[0028] FIG. 4 is a perspective view showing the clamping unit 50 of the winding assist device 1 according to the first embodiment, and FIG. 5 is a vertical cross-sectional view taken along line VV in FIG.

[0029] The clamping part 50 is made of, for example, iron and has a flat hexahedral base 51 with one surface abutting the rotation device 300. The clamping part 50 has three through holes 512 penetrating the clamping part 50 in the thickness direction, and the three through holes 512 are spaced at equal intervals. Each through hole 512 has a counterbore 511 formed on the surface opposite to the one surface. FIG. 4 shows a case where bolts B are inserted into two of the three through holes 512.

[0030] The clamping portion 50 is one end in the longitudinal direction, and a first support bracket 56 is erected on the opposite surface. The first support bracket 56 is in the shape of a rectangular thick plate, and has the same width as the base portion 51. A through hole 561 is formed in the first support bracket 56 on the tip side rather than the middle, penetrating the first support bracket 56 in the thickness direction.

[0031] A second support bracket 53 corresponding to the first support bracket 56 is provided between the second through hole 512 adjacent to the first through hole 512 closest to the first support bracket 56 and the third through hole 512 farther from the first through hole 512. The second support bracket 53 has a rectangular thick plate shape and has the same width as the base 51. The second support bracket 53 is disposed opposite the first support bracket 56.

[0032] A through hole 531 that penetrates the second support bracket 53 in the thickness direction is formed in the second support bracket 53 at a position closer to the tip than the middle and facing the through hole 561 of the first support bracket 56. The second support bracket 53 has the same length as the first support bracket 56, and is slightly thinner than the first support bracket 56.

[0033] A stopper 54 is provided upright on the opposite surface between the first through hole 512 and the second through hole 512. The stopper 54 limits the movement of an engagement block 55, which will be described later. The stopper 54 has a rectangular thick plate shape and has the same width as the base 51. The stopper 54 has a length slightly longer than the first support bracket 56 and the second support bracket 53. Both main surfaces of the stopper 54 face the second support bracket 53 and the first support bracket 56, respectively. A rectangular engagement notch 541 is formed in the stopper 54 from the base toward the tip. In other words, the stopper 54 is substantially U-shaped.

[0034] The movable round bar 52 loosely passes through the through hole 561 of the first support bracket 56 and the through hole 531 of the second support bracket 53. That is, the movable round bar 52 has both ends supported by the first support bracket 56 and the second support bracket 53, and is movable in the opposing direction of the first support bracket 56 and the second support bracket 53. The movable round bar 52 is provided with a stopper head 521 at one end on the second support bracket 53 side. Hereinafter, the portion of the movable round bar 52 excluding the stopper head 521 will be referred to as a pillar portion 522. Also, a threaded portion 523 is formed in the middle of the pillar portion 522 of the movable round bar 52 (see FIG. 5).

[0035] An engagement block 55 is screwed into the threaded portion 523 of the movable round bar 52 . The engagement block 55 has a substantially hexahedral block shape. The dimension of the engagement block 55 in the width direction of the stopper 54 is substantially the same as the width of the stopper 54, and the dimension of the engagement block 55 in the length direction of the stopper 54 is smaller than that of the stopper 54. The engagement block 55 has a first surface facing the second support bracket 53 and a second surface facing the first support bracket 56, and a long hole 551 is formed through the engagement block 55 in the opposing direction of the first surface and the second surface. A threaded portion 552 that screws into the threaded portion 523 of the moving round bar 52 is formed on the peripheral surface of the long hole 551. The moving round bar 52 and the engagement block 55 are integrated by the engagement between the threaded portion 523 and the threaded portion 552, and the engagement block 55 moves together with the moving round bar 52.

[0036] Further, in the engagement block 55, a notch 554 is formed on the first surface side. The notch 554 is formed on both edges facing each other in a direction perpendicular to the axial direction of the long hole 551, i.e., in the width direction of the stopper 54. Due to the notch 554, the dimension of the engagement block 55 on the first surface side is smaller than the dimension of the engagement block 55 on the second surface side. That is, the engagement block 55 has a convex shape in a cross section in the axial direction of the long hole 551. Therefore, as described above, the convex engagement block 55 engages with the U-shaped stopper 54. Therefore, the movement of the engagement block 55 toward the second support bracket 53 side is restricted by the stopper 54. In other words, the engagement block 55 can only move between the stopper 54 and the first support bracket 56. In addition, when the engagement block 55 engages with the stopper 54, the first surface side end of the engagement block 55 protrudes toward the second support bracket 53 side beyond the stopper 54 (see FIG. 4 and FIG. 5). Hereinafter, in the engagement block 55, a portion that protrudes toward the second support bracket 53 side beyond the stopper 54 will be referred to as a protruding end portion 555.

[0037] In the engagement block 55, an expanded diameter portion 553 is formed at the end of the long hole 551 on the second surface side. A spring 57 is loosely fitted into the other end of the movable round bar 52. The natural length of the spring 57 is longer than the distance between the engagement block 55 and the first support bracket 56, and one end is housed in the expanded diameter portion 553. The spring 57 constantly presses the engagement block 55 towards the second support bracket 53.

[0038] Fig. 6 is a perspective view showing the holding unit 40 of the winding assist device 1 according to the first embodiment, and Fig. 7 is a front view, a side view, a rear view, a plan view, and a bottom view of the holding unit 40. Fig. 7A is a side view, Fig. 7B is a front view, Fig. 7C is a rear view, Fig. 7D is a plan view, and Fig. 7E is a bottom view. In particular, Fig. 7A is a side view from the direction of the arrow in Fig. 6.

[0039] The holding part 40 is made of aluminum, for example, and has a clamped part 43 that is clamped by the clamping part 50 (see FIG. 3). The clamped part 43 is clamped by the second support bracket 53 and the engagement block 55. The clamped part 43 has a hexahedral block shape and has a first surface facing the second support bracket 53 and a second surface facing the engagement block 55. The clamped part 43 has a through-cut 431 that penetrates the clamped part 43 in the opposing direction of the first surface and the second surface. The through-cut 431 has an upper-centered semicircular arch shape with one surface side of the clamped part 43 open in a cross-sectional view. That is, the through-cut 431 has a semicircular part on the surface side opposite to the one surface, and the semicircular part has a diameter slightly larger than that of the column part 522 of the movable round bar 52. Further, the clamped portion 43 has a recess 432 formed on the second surface thereof, which is adapted to engage with a protruding end portion 555 of the engagement block 55, as described later.

[0040] In the holding portion 40, a protruding portion 42 is provided in a direction perpendicular to the opposing direction of the first surface and the second surface and the opposing direction of the one surface and the opposite surface (hereinafter referred to as the perpendicular direction). The protruding portion 42 is approximately a parallelogram in a side view, and protrudes from the held portion 43 in the perpendicular direction higher than the opposite surface of the held portion 43 (see FIG. 7A).

[0041] The end face of the protruding portion 42 in the orthogonal direction is rectangular, and a fixing portion 41 to which the prevention member 30 is fixed is provided on the edge of the end face. The fixing portion 41 is trapezoidal and stands along an edge of the clamped portion 43 closer to the second surface in the opposing direction of the first surface and the second surface. The fixing portion 41 has two through holes 411 penetrating the fixing portion 41 in the thickness direction, and the two through holes 411 are formed spaced apart in the length direction of the fixing portion 41. A screw thread is formed on the peripheral surface of the through hole 411, and the prevention member 30 is screwed into the through hole 411 (see FIG. 3). The fixing portion 41, the protruding portion 42, and the clamped portion 43 are integrally formed.

[0042] Fig. 8 is a perspective view showing the preventing member 30 of the winding assist device 1 according to the first embodiment, and Fig. 9 is a front view, a side view, a rear view, a plan view, and a bottom view of the preventing member 30. Fig. 9A is a side view, Fig. 9B is a front view, Fig. 9C is a rear view, Fig. 9D is a plan view, and Fig. 9E is a bottom view. In particular, Fig. 9A is a side view from the direction of the arrow in Fig. 8.

[0043] The prevention member 30 is made of resin and has a jig portion 31 that closes the communication grooves 20, 21, 22, and a communication portion 32 having one end connected to the jig portion 31 and the other end fixed to the holding portion 40.

[0044] The jig portion 31 has a rectangular plate shape and is disposed facing the wall 2a, 2b or 2c of the coil bobbin 100 with one surface in contact therewith during winding of the coil wire, as described below, to block the communication groove 20, the communication groove 21 or the communication groove 22 (see FIG. 12). The length of the jig portion 31 is slightly longer than the dimensions of the walls 2a, 2b and 2c of the coil bobbin 100 in the radial direction, and one end edge of the jig portion 31 is connected to the connecting portion 32. For ease of explanation, the following description will be given taking as an example a case in which the jig portion 31 is disposed facing the wall 2a and blocks the communication groove 20, as shown in FIG.

[0045] The other end of the jig portion 31 is formed with a portion obliquely corresponding to the bottom surface 2K of the communicating groove 20. That is, the other end surface 313 of the jig portion 31 includes an inclined surface that is inclined similarly to the bottom surface 2K. In the jig portion 31, the other surface 312 opposite to the one surface is a flat surface, and a step portion 311 is formed on the end portion of the other end surface 312 on the other end surface 313 side. The step portion 311 is formed in a range from the end portion of the other end surface 313 related to the inclined surface to the other end surface 313.

[0046] That is, the step portion 311 is thinner than other portions of the jig portion 31, and the shape of the step portion 311 corresponds to the shape of the tip portion of the front wall 2aa of the communication groove 20 of the coil bobbin 100. Therefore, when the winding is performed, the step portion 311 engages with the tip portion of the front wall 2aa (see FIG. 12).

[0047] The communication portion 32 has a base 322 and a connecting portion 321 that protrudes toward the jig portion 31. The base 322 is block-shaped, and the connecting portion 321 is connected to one end of the base 322. The volume of the base 322 increases toward the one end, and the length of the base 322 is shorter than that of the jig portion 31. The connecting portion 321 is plate-shaped, extends in a direction perpendicular to the jig portion 31, and is formed so that its width increases toward the jig portion 31. As described above, one end of the jig portion 31 is connected to the tip of the connecting portion 321. The base 322, the connecting portion 321, and the jig portion 31 are integrally formed.

[0048] Two through holes 323 are formed in the base 322, penetrating the base 322 in a direction intersecting the extension direction of the connecting part 321 and the length direction of the jig part 31. The prevention member 30 is fixed to the holding part 40 by inserting a bolt (not shown) into the through hole 323 and screwing it into the through hole 411 of the holding part 40.

[0049] Hereinafter, a method for attaching the winding assist device 1 according to the embodiment 1 will be described with reference to the drawings. Fig. 10 is an explanatory diagram for explaining a method for attaching the prevention member 30 and the holding part 40 after the clamping part 50 is attached to the rotating device 300.

[0050] First, the worker attaches only the clamping unit 50 to the rotating device 300. As described above, the clamping unit 50 is attached to the rotating device 300 by inserting the bolt B into the through hole 512 of the clamping unit 50 and screwing it into a screw hole (not shown) of the rotating device 300 (see FIG. 5).

[0051] The rotating device 300 has a rounded rectangular mounting plate 302 on which the coil bobbin 100 is attached for winding the coil wire, and the clamping unit 50 is attached to the upper part of the mounting plate 302. The mounting plate 302 has a coupling protrusion 301 that protrudes vertically and couples with the inside of the coil bobbin 100.

[0052] After the clamping unit 50 is attached to the rotating device 300, the worker attaches the coil bobbin 100 to the rotating device 300 and fixes the coil bobbin 100 using the retaining cover 303 (FIG. 10A). Thereafter, the worker operates the rotating device 300 to rotate the coil bobbin 100, and winds the wire into the first groove 3ad.

[0053] When the winding of the winding wire in the first groove 3ad is completed, the rotation of the coil bobbin 100 is stopped, and the prevention member 30 and the holding portion 40 are attached to the clamping portion 50. At this time, the prevention member 30 is fixed to the holding portion 40 in advance.

[0054] 10B, the operator pushes the retaining head 521 of the movable round bar 52 in the direction of the arrow, causing the engagement block 55 to move back toward the first support bracket 56. This causes the protruding end 555 of the engagement block 55 to also move back, so that it no longer protrudes from the stopper 54.

[0055] In this state where the engagement block 55 is retracted, the worker attaches the combined body of the prevention member 30 and the holding part 40 to the clamping part 50. More specifically, the worker places the clamped part 43 of the holding part 40 between the second support bracket 53 and the stopper 54 from above the clamping part 50 in the direction of the arrow in FIG. 10C. At this time, the column part 522 of the moving round bar 52 is accommodated inside the through-notch 431 of the clamped part 43. Next, the worker releases the moving round bar 52, and the engagement block 55 advances toward the stopper 54 by the restoring force of the spring 57 and engages with the stopper 54. At this time, the clamped part 43 is clamped by the second support bracket 53 and the engagement block 55, and the protruding end part 555 of the engagement block 55 engages with the recessed part 432 of the clamped part 43. The jig part 31 of the prevention member 30 is disposed in the second groove 3ab near the communicating groove 20. Thereafter, winding of the wire in the second groove 3ab begins. This makes it possible to prevent the combined body of the prevention member 30 and the holding portion 40 from coming off the rotating device 300 due to centrifugal force when the rotating device 300 rotates the coil bobbin 100.

[0056] Fig. 11 is a perspective view showing a state in which the winding assist device 1 has been attached to the rotating device 300, and Fig. 12 is a partial cross-sectional view showing a schematic state in which the winding assist device 1 has been attached to the rotating device 300. For convenience, Fig. 12 shows only the upper part of the coil bobbin 100 (wall 2a), and indicates the jig part 31 by a dashed line.

[0057] 10, when the installation of the winding assist device 1 is completed, the jig part 31 is disposed at the end of the front wall 2aa with one surface thereof in contact with the rear wall 2ab of the wall 2a of the coil bobbin 100. At this time, as described above, the step part 311 of the jig part 31 engages with the tip part of the front wall 2aa.

[0058] More specifically, the step portion 311 is accommodated in the communicating groove 20 and is interposed between the front wall 2aa and the rear wall 2ab, and the edge of the tip of the front wall 2aa abuts against the step portion 311 and the step surface of the other surface 312. In addition, the other end surface 313 of the jig portion 31 abuts against the bottom surface 2K. And the other surface 312 of the jig portion 31 is flush with the surface of the front wall 2aa on the second groove 3ab side.

[0059] Therefore, the communication groove 20 is blocked by the prevention member 30 (jig portion 31), and it is possible to prevent the winding from falling into the communication groove 20 when winding the winding in the second groove 3ab. This will be explained in detail below.

[0060] Fig. 13 is a partial cross-sectional view showing a cross section of the second groove 3ab after winding the winding L with the winding assist device 1 attached to the rotating device 300. In Fig. 13, the view inside the ellipse is a partial enlarged view showing the part surrounded by the circle. For convenience, the winding wound in the first groove 3ad is omitted from the illustration.

[0061] When the winding L is wound in the second groove 3ab, the winding L is wound like a rice bale in a cross-sectional view, with the outer winding L on top of the inner winding L. At this time, a pressing force is generated in the outer winding L toward the axial center of the coil bobbin 100, i.e., the inner winding L. This pressing force may cause the winding L to fall into the communicating groove 20 and the aligned winding to be lost (see the arrow in the partially enlarged view). In such a case, the windings L may come into contact with each other, causing insulation breakdown and resulting in a malfunction.

[0062] In contrast, when the winding assist device 1 according to the first embodiment is used, the prevention member 30 (jig part 31) of the winding assist device 1 is accommodated in the communicating groove 20 and is interposed between the front side wall 2aa and the rear side wall 2ab, thereby blocking the communicating groove 20 (see the dashed square in FIG. 13). Therefore, it is possible to prevent the winding L from falling into the communicating groove 20 when winding the winding in the second groove 3ab.

[0063] Furthermore, as described above, when the winding support device 1 is attached to the rotating device 300, the step portion 311 of the jig portion 31 is interposed between the front wall 2aa and the rear wall 2ab, so that the front wall 2aa of the communicating groove 20 is not bent by the windings L piled up when the windings L are wound, and it is possible to reliably prevent the windings L from falling into the communicating groove 20 and disrupting the aligned winding.

[0064] As described above, in the winding assist device 1 according to the first embodiment, the other surface 312 of the jig part 31 is flush with the surface of the front side wall 2aa on the second groove 3ab side when the winding assist device 1 is attached to the rotating device 300. This reliably prevents the winding L from falling into the communicating groove 20 and causing the aligned winding to become distorted.

[0065] Furthermore, as described above, when the winding support device 1 of embodiment 1 is attached to the rotating device 300, the step portion 311 of the jig portion 31 engages with the tip portion of the front wall 2aa, making it easy to position the winding support device 1 during attachment.

[0066] Furthermore, as described above, in the winding assist device 1 according to the first embodiment, the winding L is a copper wire, whereas the prevention member 30 (jig portion 31) is made of a resin having a lower hardness than the winding L. Therefore, it is possible to prevent the winding L from being damaged by the jig portion 31.

[0067] As described above, in the winding assist device 1 according to the first embodiment, the clamping portion 50 detachably clamps the holding portion 40 that holds the preventing member 30. This makes it easy to remove the preventing member 30.

[0068] (Embodiment 2) FIG. 14 is a perspective view showing a prevention member 30 of the winding assist device 1 according to the second embodiment. The prevention member 30 is made of resin, as in the first embodiment, and has a jig part 31 that closes the communication grooves 20, 21, 22, and a communication part 32 having one end connected to the jig part 31 and the other end fixed to the holding part 40. The jig part 31 is the same as in the first embodiment, and a detailed description thereof will be omitted.

[0069] The connecting portion 32 has a base portion 322 and a connecting portion 321A that protrudes toward the jig portion 31 side. The base 322 has a block shape, as in the first embodiment, and has a connecting portion 321A connected to one end. The volume of the base 322 increases toward the one end, and two through holes 323 are formed in the base 322. The prevention member 30 is fixed to the holding portion 40 by inserting a bolt (not shown) into the through hole 323 and screwing it into the through hole 411 of the holding portion 40. In addition, a step portion 324 is provided at one end of the base 322, and the connecting portion 321A is placed on the step portion 324.

[0070] The connecting portion 321A has a plate shape, extends in a direction perpendicular to the jig portion 31, and is formed so as to become wider as it approaches the jig portion 31. As described above, one end of the jig portion 31 is connected to the tip of the connecting portion 321A.

[0071] Moreover, the winding assist device 1 according to the second embodiment includes an expansion / contraction mechanism 327 that expands / contracts the gap between the base 322 and the jig part 31, i.e., the length of the connecting part 321A. The expansion / contraction mechanism 327 has an engagement protrusion 325 provided on the base 322 side and an engagement hole 326 provided on the connecting part 321A side. The engagement protrusion 325 is inserted into the engagement hole 326 and removably fixed.

[0072] The engagement protrusions 325 are provided to protrude from the step portion 324 of the base portion 322. The engagement protrusions 325 are cylindrical, and three engagement protrusions 325 are arranged in a row at equal intervals along the longitudinal direction of the connecting portion 321A, and two rows each consisting of three engagement protrusions 325 are parallel to each other.

[0073] The engagement holes 326 are formed in the connecting portion 321A. That is, the engagement holes 326 penetrate the connecting portion 321A in the thickness direction. Each engagement hole 326 is a circular hole and has a diameter slightly larger than that of the engagement protrusions 325. The connecting portion 321A has three engagement holes 326 arranged in a row at equal intervals along the length direction of the connecting portion 321A, and similar to the engagement protrusions 325, two rows each consisting of three engagement holes 326 are parallel to each other.

[0074] In the preventing member 30 of the winding assist device 1 according to the second embodiment having such an expansion / contraction mechanism 327, the length of the connecting portion 321A can be expanded or contracted. When one engaging protrusion 325 in each row engages with the engaging hole 326, the length of the connecting portion 321A is the longest, and when all of the engaging protrusions 325 in each row engage with the engaging holes 326, the length of the connecting portion 321A is the shortest. Therefore, in the winding assist device 1 according to the second embodiment, when winding the winding L, the holding portion 40 that holds the preventing member 30 is clamped by the clamping portion 50, and then the length of the connecting portion 321A can be expanded or contracted according to the first groove 3ad, the second groove 3ab, the third groove 3bc, and the fourth groove 3cd, thereby improving the workability of winding the winding L.

[0075] The same parts as those in the first embodiment are given the same reference numerals and detailed description thereof will be omitted.

[0076] The technical features (constituent elements) described in the first and second embodiments can be combined with each other, and by combining them, new technical features can be constructed. 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.

[0077] 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]

[0078] 1: winding support device, 2a, 2b, 2c: wall (partition wall), 3ad: first groove, 3ab: second groove, 3bc: third groove, 3cd: fourth groove, 20, 21, 22: communication groove, 30: prevention member, 31: jig part, 32: connection part, 40: holding part, 50: clamping part, 202: opening end (outlet), 201: opening end (inlet), 100: coil bobbin, 300: rotating device, 311: step part, 312: other surface, 327: expansion / contraction mechanism, L: winding

Claims

1. A winding support device that can be attached to and detached from a rotating device that rotates a transformer bobbin to wind a winding, the bobbin having a partition wall between adjacent grooves and a communication groove formed in a circumferential direction between the grooves, the winding support device comprising: A winding support device having a plate-shaped jig portion disposed opposite the partition wall to close the communicating groove.

2. the communication groove includes a first wall on a first groove side where an inlet of the winding is open when wound, and a second wall on a second groove side where an outlet of the winding is open, The winding assist device according to claim 1 , wherein the jig portion has a main surface that is flush with a surface of the second wall on the second groove side when attached.

3. The winding assist device according to claim 2 , wherein the main surface is formed with a stepped portion that engages with an end portion of the second wall.

4. The winding assist device according to claim 1 , wherein the jig portion is made of a material having a lower hardness than the winding.

5. A holding portion that holds the jig portion; The winding assist device according to claim 1 , further comprising a clamping portion attached to the rotating device and configured to detachably clamp the holding portion.

6. A method for mounting a winding assist device to a rotating device that rotates a transformer bobbin and winds a winding, the rotating device having a partition wall between adjacent grooves arranged in an axial direction, the partition wall having a circumferentially formed communicating groove that connects the adjacent grooves, the method comprising the steps of: An attachment method in which a plate-shaped jig portion is disposed opposite the partition wall so as to close the communicating groove.

7. the communication groove includes a first wall on a first groove side where an inlet of the winding is open when wound, and a second wall on a second groove side where an outlet of the winding is open, The mounting method according to claim 6 , wherein a main surface of the jig portion is made flush with a surface of the second wall on the second groove side.

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