Wire drawing jig, and wire drawing method

Abstract

To allow drawing of a wire from a bobbin to be performed in a space saving manner without the wire being hooked in a flange part of the bobbin.SOLUTION: A wire drawing jig (20) draws a wire from a bobbin (10) which has a winding core (11) around which a wire (15) is wound in the circumferential direction, a first flange part (12) fixed to one end of the winding core, and a second flange part (13) fixed to the other end of the winding core. The wire drawing jig includes: a fixing part (21) fixed to the bobbin; and a rotation part (22) which is connected with respect to the fixing part in a rotatable manner, in which a passing hole (33) where the wire passes is formed, and which rotates according to a delivery position of the wire from the winding core when drawing the wire which has passed the passing hole out of the winding core by pulling it.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a jig used when unwinding a wire from a bobbin around which the wire is wound, and a method for unwinding the wire. [Background technology]

[0002] When pulling out a wire such as a conductor or wiring wound around a cylindrical bobbin, a shaft that serves as a rotation axis is inserted into a through hole that extends in the axial direction of the bobbin, and the bobbin is rotatably supported with the rotation axis horizontal. The wire is then pulled and pulled out while rotating the bobbin.

[0003] When the weight of the bobbin is large and a large force is required to manually pull the wire, or when a high degree of smoothness and precision is required in unwinding the wire from the bobbin, a pulley is used to unwind the wire from the bobbin. For example, Patent Document 1 discloses a device that uses a pulley to unwind the wire from the bobbin when winding a deflection coil.

[0004] In another method, the bobbin is placed in a non-rotating state and the worker manually pulls out the wire from the bobbin. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2001-93416 A Summary of the Invention [Problem to be solved by the invention]

[0006] In order to install a mechanism for rotatably supporting the bobbin and a pulley for guiding the wire, a certain amount of space is required, and when performing the wire pulling operation in a limited space, it may not be possible to install the rotation support mechanism, pulley, etc.

[0007] When it is not possible to install a rotary support mechanism or pulleys, in order to perform the wire pulling out work in a limited space, a method is used in which the bobbin is placed so that its through hole is perpendicular to the floor surface, and the wire is pulled upward while being pulled out.

[0008] However, because the position at which the wire is unwound from the bobbin changes in the circumferential direction of the bobbin, if the wire is only pulled upward or pulled excessively in an oblique direction, the wire may get caught on the flange of the bobbin, preventing it from being pulled out. This makes it necessary to rotate the wire in the circumferential direction of the bobbin while pulling it out, which makes the work complicated.

[0009] SUMMARY OF THE PRESENT EMBODIMENTS Accordingly, an object of the present invention is to provide a wire unwinding jig and a wire unwinding method which are space-saving and capable of unwinding a wire without getting caught on the flange of a bobbin. [Means for solving the problem]

[0010] A wire pulling-out jig of one embodiment of the present invention is a wire pulling-out jig that pulls out a wire from a bobbin having a winding core around which a wire is wound in a circumferential direction, a first flange portion fixed to one end of the winding core, and a second flange portion fixed to the other end of the winding core, and includes a fixed part fixed to the bobbin, and a rotating part rotatably connected to the fixed part, having a through hole through which the wire passes, and rotating to match the payout position of the wire from the winding core when the wire that has passed through the through hole is pulled and pulled out from the winding core.

[0011] A wire unwinding method according to one embodiment of the present invention is a wire unwinding method using the above-mentioned wire unwinding tool, and includes a fixed part attachment step of fixing and attaching the fixed part to the bobbin, a wire threading step of passing the wire wound around the winding core through the through hole of the rotating part, and a unwinding step of pulling the wire that has passed through the through hole, thereby rotating the rotating part in accordance with the unwinding position of the wire, and unwinding the wire from the winding core. Effect of the Invention

[0012] According to the wire rod unwinding jig and wire rod unwinding method of the present invention, since it does not require a mechanism for rotatably supporting the bobbin or a pulley for guiding the wire rod, but only uses the wire rod unwinding jig attached to the bobbin, it is possible to perform the wire rod unwinding work with a space-saving configuration. In addition, since the wire rod is passed through the through hole of the rotating part of the wire rod unwinding jig and the rotating part is rotated according to the wire rod unwinding position to unwind the wire rod from the core, the worker does not need to perform complicated operations such as manually rotating the wire rod, and the wire rod can be smoothly unwinded without getting caught on the flange of the bobbin. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a perspective view of the wire drawing jig of the first embodiment. [Diagram 2] FIG. 11 is a side view illustrating the bobbin installation step. [Diagram 3] 11 is a cross-sectional view illustrating a fixing portion attachment step. FIG. [Figure 4] FIG. 4 is a cross-sectional view illustrating a wire threading step. [Diagram 5] FIG. 11 is a cross-sectional view illustrating a drawing step. [Figure 6] FIG. 6 is a cross-sectional view showing a wire drawing jig according to a second embodiment. [Figure 7] FIG. 11 is a cross-sectional view showing a wire drawing jig according to a third embodiment. [Figure 8] FIG. 11 is a cross-sectional view showing a wire drawing jig according to a fourth embodiment. [Figure 9] FIG. 13 is a cross-sectional view showing a wire rod drawing jig according to a fifth embodiment. [Figure 10] FIG. 1 is a side view showing a conventional wire drawing method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a wire pulling-out jig and a wire pulling-out method according to the present embodiment will be described with reference to the attached drawings. The present embodiment relates to a wire pulling-out jig used when pulling out a wire 15 wound around a bobbin 10, and a wire pulling-out method using the wire pulling-out jig.

[0015] Fig. 1 shows a wire rod extracting jig 20 of a first embodiment, and Figs. 2 to 5 show each step of a wire rod extracting method using the wire rod extracting jig 20. Fig. 6 shows a wire rod extracting jig 40 of a second embodiment. Fig. 7 shows a wire rod extracting jig 50 of a third embodiment. Fig. 8 shows a wire rod extracting jig 60 of a fourth embodiment. Fig. 9 shows a wire rod extracting jig 70 of a fifth embodiment. Fig. 10 shows an example of a conventional wire rod extracting method.

[0016] 2, the bobbin 10 has a cylindrical winding core 11, a first flange 12 fixed to one end of the winding core 11, and a second flange 13 fixed to the other end of the winding core 11. In the bobbin 10, the direction in which the central axis C of the winding core 11 extends is defined as the axial direction. The first flange 12 and the second flange 13 are disk-shaped portions with a diameter larger than the diameter of the winding core 11.

[0017] A through hole 14 is formed inside the bobbin 10, extending in the axial direction and penetrating the winding core 11, the first flange portion 12, and the second flange portion 13. One end of the through hole 14 opens to approximately the center of the end face of the first flange portion 12, and the other end of the through hole 14 opens to approximately the center of the end face of the second flange portion 13. The through hole 14 has a cylindrical inner circumferential surface surrounding the central axis C.

[0018] A wire 15 is wound in the circumferential direction around the outer circumferential surface of the winding core 11. The wire 15 is a long, thin flexible member such as a conductive wire such as an enameled wire, a thread used for fishing or sewing, or a tube that is a hollow tubular body. The winding core 11 around which the wire 15 is wound has a first flange 12 and a second flange 13, each of which has a diameter larger than that of the winding core 11, at both ends thereof, thereby holding the wire 15 on the outer circumferential surface of the winding core 11 and preventing the wire 15 from falling off the winding core 11.

[0019] The material and use of the wire 15 are not limited, and it may be any material that is used by being unwound from the winding core 11 of the bobbin 10, such as a conductor wire or a tube used for piping. In particular, the wire unwinding jig and wire unwinding method of the present embodiment are highly useful when the length of the wire 15 to be unwound from the bobbin 10 is long and the unwinding operation takes a long time, or when it is difficult for an operator to manually move the wire 15 in a complicated manner. As an example, when the wire 15 is a conductor wire and the wire 15 is wound at a location other than the bobbin 10 while being unwound from the bobbin 10 to form a coil, a large amount of the wire 15 is unwound, and excellent unwinding operability is required.

[0020] Conventionally, the wire rod 15 has been pulled out from the bobbin 10 by various methods. For example, a method is known in which a shaft serving as a rotation axis is inserted into the through hole 14 of the bobbin 10, the rotation axis is made horizontal, and the wire rod 15 is pulled while rotating the bobbin 10. By rotating the bobbin 10 while unwinding the wire rod 15 by moving it away from the winding core 11, the unwinding position of the wire rod 15 in the circumferential direction of the winding core 11 (the position where the wire rod 15 separates from the winding core 11) can be made substantially constant, thereby realizing stable unwinding of the wire rod 15.

[0021] In addition, when the weight of the bobbin 10 is large and a large force is required to manually pull the wire 15, or when tension control of the wire 15 unwound from the bobbin 10 is important, the bobbin 10 may be rotatably supported and the wire 15 may be guided by a pulley while being unwound.

[0022] The above method of unwinding the wire 15 while rotating the bobbin 10 requires a rotary support mechanism for rotatably supporting the bobbin 10, a pulley for guiding the wire 15, and the like, and therefore requires space for these mechanisms and components, resulting in a problem that the method cannot be applied when the wire is unwinded in a limited space. For example, when a worker winds a conductor wire on a desk to form a coil, it is difficult to install a rotary support mechanism and a pulley around the desk. In addition, providing a rotary support mechanism and a pulley causes a problem that the structure becomes complicated and the cost increases.

[0023] As another conventional wire-pulling method for cases where the working space is limited, a method is known in which the bobbin 10 is fixedly installed without being rotated, and an operator manually rotates the wire 15 in the circumferential direction of the winding core 11 while pulling out the wire 15 from the winding core 11. This method does not require a mechanism for rotatably supporting the bobbin 10 or a pulley for guiding the wire 15, and therefore has the advantages of a simple structure, low cost, and high freedom in the work location.

[0024] With reference to Fig. 10, an example of a conventional method for drawing out the wire 15 without rotating the bobbin 10 will be described. The bobbin 10 is supported on the mounting surface 16 such as a floor or a pedestal in a vertical position with the central axis C oriented perpendicular (vertical) to the mounting surface 16. More specifically, the bobbin 10 is placed on the mounting surface 16 with the end face of the second flange portion 13 as the bottom face. A work desk (not shown) is located above the mounting surface 16, and the wire 15 drawn out from the bobbin 10 is pulled upward and a predetermined operation is performed on the work desk. For example, when the wire 15 is a conductor, the wire 15 is wound on the work desk to form a coil.

[0025] When the wire rod 15 is pulled out from the winding core 11, the wire rod 15 moves away from the outer peripheral surface of the winding core 11 while changing its position in the circumferential direction of the winding core 11. That is, when viewed from the side, the wire rod 15 is pulled out upward while oscillating in the diameter direction of the winding core 11. Since the first flange 12, which has a larger diameter than the winding core 11, is located above the position where the wire rod 15 is pulled out from the winding core 11, simply pulling the wire rod 15 from a fixed position above may cause the wire rod 15 to get caught on the first flange 12, which has an overhanging structure with respect to the winding core 11, and may hinder the pulling out of the wire rod 15. In addition, as shown in FIG. 10, if the payout position where the wire rod 15 moves away from the winding core 11 and the position where the wire rod 15 is pulled upward are in a positional relationship opposite (diagonally) with respect to the central axis C, the wire rod 15 is likely to get caught on the first flange 12.

[0026] Incidentally, even if the end of the winding core 11 does not have a flange portion such as the first flange portion 12, if the diameter of the winding core 11 is large, the amplitude of the wire rod 15 in the diameter direction of the winding core 11 increases when the wire rod 15 is pulled upward from the winding core 11. Therefore, simply pulling the wire rod 15 from a fixed position above may not allow the wire rod 15 to be smoothly unwound from the winding core 11.

[0027] Thus, in the conventional wire-rod unwinding method, when the wire rod 15 is unwound without rotating the bobbin 10, the wire rod 15 is likely to get caught or otherwise become stuck if it is simply pulled in the axial direction of the bobbin 10. In order to prevent such a problem, the worker is required to perform an action of pulling the wire rod 15 in the axial direction while rotating the wire rod 15 in the circumferential direction of the winding core 11. However, such a complicated action is troublesome for the worker to perform, and the workability is poor. In particular, if the wire rod 15 is unwound from the bobbin 10 and a complicated action is required to be performed on the work desk, the workability may be significantly deteriorated and the work time may be extended.

[0028] Furthermore, if a predetermined amount of wire 15 is pulled out from bobbin 10 before pulling wire 15 upward, and then a predetermined operation is performed on wire 15 on a work desk, the excess wire 15 pulled out may get tangled with objects around bobbin 10 or be stepped on by the worker, which may actually reduce work efficiency.

[0029] Therefore, unlike the above-mentioned conventional methods, there has been a demand for a method that can easily and reliably unwind the wire 15 from the bobbin 10 in a small space and without requiring an operator to perform complicated operations. The present embodiment provides a wire unwinding jig and a wire unwinding method that satisfy such demands.

[0030] A wire rod pulling-out jig 20 of the first embodiment shown in Figures 1, 3 to 5 includes a fixed part 21 fixedly attached to the bobbin 10, and a rotating part 22 rotatably connected to the fixed part 21 via a bearing 23. Figure 1 shows the wire rod pulling-out jig 20 in a state where the fixed part 21 and the fixed part 22 are separated from each other.

[0031] The fixed portion 21 includes a shaft 24 extending in the axial direction. The shaft 24 has a cylindrical outer peripheral surface with a diameter (outer diameter) corresponding to the inner diameter of the through hole 14 of the bobbin 10, and is insertable into the through hole 14. A plurality of slits 25 are formed at the tip end of the shaft 24 at intervals in the circumferential direction.

[0032] At least the tip side of the shaft 24 having the slit 25 is a hollow cylinder, and the provision of the slit 25 allows the diameter to be changed by expanding and contracting in the radial direction. The diameter of the shaft 24 in the initial state before being inserted into the through hole 14 is slightly larger than the inner diameter of the through hole 14. When the shaft 24 is inserted into the through hole 14 as shown in Figs. 4 and 5, the diameter of the inserted portion of the shaft 24 becomes smaller and the shaft 24 is press-fitted into the through hole 14. This press-fitting holds the shaft 24 in the through hole 14 in a state where the movement is restricted, and the fixing portion 21 is fixed to the bobbin 10. The material of the shaft 24 can be selected arbitrarily, but as an example, the shaft 24 is made of a synthetic resin, which makes it easier to press the shaft 24 into the through hole 14 by the above-mentioned expansion and contraction deformation.

[0033] The structure for connecting and fixing the shaft 24 to the bobbin 10 is not limited to the above. For example, the inner surface of the through hole 14 and the outer surface of the shaft 24 may be formed into a shape other than a cylindrical surface (such as a polygonal shape) so that the relative rotation of the shaft 24 is restricted when the shaft 24 is inserted into the through hole 14. Alternatively, a hole or a recess for preventing the shaft 24 from coming off may be provided on one of the through hole 14 and the shaft 24, and a protrusion for preventing the shaft 24 from coming off may be provided on the other. When the shaft 24 is inserted into the through hole 14 to a predetermined depth, the protrusion engages with the hole or the recess to restrict the relative movement in the axial direction. In this way, the rotation and axial movement of the shaft 24 are restricted when the shaft 24 is inserted into the through hole 14, and the fixing part 21 is fixed to the bobbin 10.

[0034] The fixed portion 21 is provided with a stopper 26 between one end of the shaft 24 inserted into the through hole 14 and the other end of the shaft 24 on which the bearing 23 is provided. The stopper 26 is fixed to the shaft 24. The stopper 26 is a ring-shaped portion having a diameter larger than that of the shaft 24, and protrudes radially outward beyond the outer circumferential surface of the shaft 24.

[0035] 4 and 5, when the shaft 24 is inserted into the through hole 14, the end of the stopper 26 abuts against the first flange portion 12, and the shaft 24 is not inserted any further into the through hole 14. This makes it easy to set an optimal insertion amount for the shaft 24 to be press-fitted and fixed into the through hole 14. Furthermore, by the stopper 26 abutting against the first flange portion 12, the inclination of the fixing portion 21 relative to the bobbin 10 is suppressed, and the fixing strength can be improved.

[0036] It is also possible to omit the stopper 26 from the fixing portion 21. When the stopper 26 is not provided, it is sufficient for an operator to confirm that the shaft 24 has reached the position where it is pressed into the through-hole 14 and fixed. Alternatively, a mark indicating the proper insertion position may be formed on the outer circumferential surface of the shaft 24, so that an operator can visually confirm that the shaft 24 has been inserted up to the position of the mark.

[0037] The rotating part 22 includes a main body 27. The main body 27 has a cylindrical structure with a solid interior and a smooth cylindrical outer circumferential surface. The diameter of the main body 27 is smaller than the diameters of the winding core 11, the first flange 12, and the second flange 13 of the bobbin 10, and is larger than the diameter of the shaft 24 of the fixed part 21.

[0038] The rotating part 22 has a cylindrical connecting part 28 surrounding the shaft 24 and the bearing 23 at one end side of the main body part 27. The bearing 23 is a ball bearing including an inner ring 29 supported in contact with the outer circumferential surface of the shaft 24 and an outer ring 30 supported in contact with the inner circumferential surface of the connecting part 28, and a plurality of balls 31 arranged at different positions in the circumferential direction between the inner ring 29 and the outer ring 30. The balls 31 are rollable with respect to the connecting part 28 and the inner ring 29, and the connecting part 28 to which the outer ring 30 is attached is supported to be rotatable about the central axis C with respect to the shaft 24 to which the inner ring 29 is attached. Thus, the rotating part 22 is rotatably connected to the fixed part 21 via the bearing 23.

[0039] By providing the bearing 23 having the balls 31, the rotating part 22 can rotate smoothly relative to the fixed part 21, which contributes to improving the workability when the wire 15 is pulled out from the bobbin 10 using the wire pulling-out jig 20. In particular, when the weight of the rotating part 22 is heavy, it is useful to connect the fixed part 21 and the rotating part 22 via the bearing 23, which has an excellent friction reducing effect.

[0040] It is also possible to connect the fixed part 21 and the rotating part 22 without the bearing 23. For example, the outer peripheral surface of the shaft 24 and the inner peripheral surface of the connecting part 28 may be directly in contact with each other to rotatably support the rotating part 22. In this case, the outer peripheral surface of the shaft 24 and the inner peripheral surface of the connecting part 28 may be subjected to a surface treatment having a friction reducing effect (for example, a fluororesin coating or tape attachment). Also, instead of the bearing 23, another member having a friction reducing effect (for example, a ring made of a low-friction material such as a fluororesin) may be disposed between the fixed part 21 and the rotating part 22. When the weight of the rotating part 22 is small and the original rotation resistance is expected to be small, it is also possible to apply a connection structure without the bearing 23, as in these modified examples.

[0041] The rotating part 22 has a protrusion 32 at the end of the main body part 27 opposite to the side having the connection part 28. As shown in Fig. 1, the protrusion 32 has a box-shaped structure whose width is smaller than the diameter of the main body part 27, and is located approximately at the center of the main body part 27 in the radial direction.

[0042] The shape of the protruding portion 32 is not limited to the box shape as shown in Fig. 1, and may be a cylindrical shape, etc. The protruding portion 32 may have any structure as long as it can form a through hole 33 described later.

[0043] The protruding portion 32 has a through hole 33 inside. The through hole 33 has an introduction hole portion 331 that opens on a side surface of the protruding portion 32 and extends radially toward the central axis C, and an outlet hole portion 332 that opens on an end face (upper surface) of the protruding portion 32 and extends axially, and is an L-shaped hole in which the introduction hole portion 331 and the outlet hole portion 332 are connected (communicated) inside the protruding portion 32. The through hole 33 has an opening diameter that allows the wire 15 to be inserted therethrough.

[0044] A method for unwinding the wire 15 from the bobbin 10 using the wire unwinding jig 20 configured as above will be described.

[0045] [Bobbin installation steps] First, a bobbin installation step shown in Fig. 2 is performed. In the bobbin installation step, the bobbin 10 is placed on the placement surface 17 with the extension direction of the through hole 14 perpendicular to the placement surface 17 and the end face of the second flange portion 13 facing downward. The placement surface 17 is a substantially horizontal surface, such as a floor or a pedestal. When placed on the placement surface 17, the bobbin 10 is placed vertically and the extension direction of the through hole 14 (the direction of the central axis C) is substantially vertical. In addition, the first flange portion 12 is located above the winding core 11.

[0046] 2, the first flange 12 may be placed on the placement surface 17. In this case, the second flange 13 is located above the winding core 11, and the second flange 13, not the first flange 12, is the part to be considered for preventing the wire rod 15 from getting caught when the wire rod 15 is pulled out upward.

[0047] The axial direction (direction of the central axis C) of the bobbin 10 in the state where it is installed in the bobbin installation step may not be completely perpendicular to the mounting surface 17. Alternatively, unlike the mounting surface 17 of this embodiment, the mounting surface on which the bobbin 10 is placed may not be a completely horizontal surface. In other words, in the state where the bobbin 10 is installed, the central axis C may be inclined to some extent with respect to the vertical direction. Even if the central axis C is inclined to some extent with respect to the vertical direction, the wire 15 can be smoothly drawn out from the bobbin 10 by carrying out each step described below.

[0048] [Fixed part installation steps] 3 is performed. In the fixing portion attachment step, the fixing portion 21 is attached to the bobbin 10 in a fixed state. The fixing portion 21 is attached by inserting the shaft 24 into the through hole 14 from the first flange portion 12 side opposite the mounting surface 17. When the shaft 24 is inserted until the stopper 26 abuts against the end face of the first flange portion 12, the shaft 24 is pressed into the through hole 14 and the fixing portion 21 is fixed to the bobbin 10.

[0049] The fixed part attachment step may be performed in a state where the fixed part 21 and the rotating part 22 are connected in advance via the bearing 23, or may be performed with only the fixed part 21 before connecting the rotating part 22. If the fixed part attachment step is performed with only the fixed part 21, then a connection step is performed in which the rotating part 22 is rotatably connected to the fixed part 21 via the bearing 23.

[0050] It is also possible to first attach the fixing portion 21 to the bobbin 10 and then place the bobbin 10 on the placement surface 17. In other words, the bobbin placement step and the fixing portion attachment step may be performed in either order, and the order is not limited.

[0051] [Wire threading step] Next, a wire threading step shown in Fig. 4 is performed. In the wire threading step, the wire 15 wound around the winding core 11 is passed through the through hole 33 of the rotating part 22. More specifically, the wire 15 drawn out so as to move away from the outer circumferential surface of the winding core 11 in the radial direction is guided to the side of the rotating part 22, bypassing the side of the first flange part 12. Then, the wire 15 is inserted into the through hole 33 from the opening on the side surface side of the protruding part 32, and the wire 15 is advanced from the introduction hole part 331 to the discharge hole part 332, so that the wire 15 is caused to protrude outside the through hole 33 from the opening on the end face side of the protruding part 32. Since the discharge hole part 332 is located on the central axis C, the wire 15 protruding from the through hole 33 is oriented upward along the central axis C.

[0052] [Pull-out step] Next, the unwinding step shown in Fig. 5 is performed. In the unwinding step, the wire rod 15 protruding through the through hole 33 is pulled in the axial direction. The operation of pulling the wire rod 15 may be performed manually by an operator or may be performed using a tool or other equipment. When the wire rod 15 is pulled in the axial direction, the wire rod 15 wound around the winding core 11 is pulled out from the winding core 11 by the amount of pulling.

[0053] When the wire rod 15 is pulled out from the winding core 11, the payout position of the wire rod 15 from the winding core 11 (the position where the wire rod 15 separates from the winding core 11) changes in the circumferential direction of the winding core 11. Then, based on the change in the payout position of the wire rod 15 in the circumferential direction on the winding core 11 side, a force in the rotational direction acts on the rotating part 22 through which the wire rod 15 is passed through the through hole 33. Since the rotating part 22 is rotatably supported by the fixed part 21 via the bearing 23, the rotating part 22 rotates while changing the orientation of the introduction hole part 331 of the through hole 33 in accordance with the payout position of the wire rod 15 from the winding core 11.

[0054] In this way, the rotating part 22 rotates in response to the change in the payout position of the wire rod 15 from the winding core 11, thereby changing the orientation of the introduction position (the opening of the introduction hole part 331) of the wire rod 15 in the through hole 33. As a result, the wire rod 15 pulled out from the winding core 11 is always smoothly guided to the through hole 33 without getting caught on the first flange part 12 or irregularly twisted or entangled, and the wire rod 15 can be paid out upward from the through hole 33.

[0055] The action performed by the worker in the unwinding step is only the action of pulling the wire rod 15 in the axial direction of the bobbin 10, and the turning of the wire rod 15 in the circumferential direction of the winding core 11 is automatically performed by the guide of the rotating part 22 which rotates in response to the pulling force in the axial direction. Therefore, the wire rod 15 can be easily and reliably unwound from the bobbin 10 without the worker having to perform the action of turning the wire rod 15 in the circumferential direction.

[0056] In particular, since the lead-out hole portion 332 of the through hole 33 is formed on the central axis C, the wire 15 unwound from the lead-out hole portion 332 of the through hole 33 can be drawn upward in a straight trajectory with almost no oscillation in the diameter direction of the bobbin 10. Therefore, resistance when drawing out the wire 15 from the through hole 33 is very small. Also, the risk that the wire 15 unwound from the through hole 33 will get caught on or interfere with other parts is very low.

[0057] In addition, since the diameter of the main body portion 27 of the rotating part 22 is smaller than the diameter of the winding core 11 and the diameter of the first flange portion 12, the rotating part 22 is unlikely to impede the progress of the wire rod 15 between the winding core 11 and the through hole 33, and the wire rod 15 can be guided along a smooth trajectory to the through hole 33. Furthermore, since the outer circumferential surface of the main body portion 27 is a smooth cylindrical surface, even if the wire rod 15 comes into contact with the main body portion 27, there is little risk that the wire rod 15 will be caught by the main body portion 27.

[0058] Next, a wire rod extracting jig according to another embodiment will be described with reference to Fig. 6 to Fig. 9. In the other embodiment, components similar to those of the wire rod extracting jig 20 according to the first embodiment are denoted by the same reference numerals in the drawings, and descriptions thereof will be omitted. Also, a wire rod extracting method using the wire rod extracting jig according to the other embodiment is carried out by the same steps as those of the wire rod extracting method using the wire rod extracting jig 20 according to the first embodiment.

[0059] In the second embodiment of the wire drawing jig 40 shown in Figure 6, the rotating part 22 does not have a portion corresponding to the above-mentioned protrusion 32, and a through hole 41 is formed inside the main body 27 of the rotating part 22.

[0060] The through hole 41 has an introduction hole portion 411 that opens into the outer circumferential surface of the main body portion 27, and an outlet hole portion 412 that opens into an end face (upper surface) of the main body portion 27. The introduction hole portion 411 is an inclined hole that changes its axial position as it advances radially from the outer circumferential surface side of the main body portion 27 toward the central axis C side, and is inclined so as to come closer to the end face of the main body portion 27 as it advances toward the central axis C side. The outlet hole portion 412 is a hole that extends in the axial direction, and is connected (communicates) with the introduction hole portion 411 inside the introduction hole portion 411.

[0061] In the wire pulling method using the wire pulling tool 40, in the wire threading step, the wire 15 unwound from the winding core 11 is passed through the through hole 41 of the rotating part 22. The wire 15 pulled out so as to move away from the outer circumferential surface of the winding core 11 in the radial direction is guided around the side of the first flange 12 to the side of the rotating part 22. Then, the wire 15 is inserted into the through hole 41 from the opening on the outer circumferential surface side of the main body 27, and is advanced from the introduction hole 411 to the exit hole 412, so that the wire 15 protrudes outside the through hole 41 from the opening on the end face side of the main body 27.

[0062] Since the lead-out hole portion 412 is located on the central axis C, the wire rod 15 protruding from the through hole 41 faces upward along the central axis C. Therefore, in the drawing step performed after the wire rod passing step, when the wire rod 15 is pulled in the axial direction, the rotating part 22 rotates in accordance with the position where the wire rod 15 is paid out from the winding core 11, and the same effect as in the first embodiment can be obtained.

[0063] Furthermore, since the through hole 41 has an inclined introduction hole portion 411 including radial and axial components, the wire 15 that is pulled out from the winding core 11 and passed through the through hole 41 across the side of the first flange portion 12 can be guided upward from the exit hole portion 412 along a smooth trajectory along the introduction hole portion 411.

[0064] In the wire pulling tool 50 of the third embodiment shown in Fig. 7, the diameter of the main body 51 of the rotating part 22 is larger than the diameter of the main body 27 of the first embodiment, and the main body 51 does not have a portion corresponding to the protruding portion 32. The diameter of the main body 51 is approximately the same as the diameter of the first flange 12 of the bobbin 10 or slightly smaller than the diameter of the first flange 12. A through hole 53 is formed inside the lateral protruding portion 52 protruding laterally from the outer circumferential surface of the main body 51, penetrating in the axial direction. When the wire pulling tool 50 is attached to the bobbin 10, the through hole 53 extends generally parallel to the central axis C.

[0065] In the wire pulling method using the wire pulling tool 50, in the wire threading step, the wire 15 unwound from the winding core 11 is passed through the through hole 53 of the rotating part 22. More specifically, the wire 15 pulled out so as to move away from the outer circumferential surface of the winding core 11 in the radial direction is guided around the side of the first flange part 12 to below the lateral protruding part 52. Then, the wire 15 is inserted from the lower opening of the through hole 53, and is caused to protrude outside the through hole 53 from the upper opening of the through hole 53.

[0066] In the drawing step performed after the wire threading step, when the wire rod 15 unwound from the through hole 53 is pulled in the axial direction, a force in the rotational direction acts on the rotating part 22 through which the wire rod 15 is passed through the through hole 53, and the rotating part 22 rotates to match the unwinding position of the wire rod 15 from the winding core 11. This rotation of the rotating part 22 causes the position of the through hole 53 to change in accordance with the change in the unwinding position of the wire rod 15 in the circumferential direction of the winding core 11. As a result, the wire rod 15 unwound from the winding core 11 can be smoothly passed through the through hole 53 and unwound upward from the through hole 53 without getting caught on the first flange portion 12 or the like or being irregularly twisted.

[0067] In the wire drawing jig 50, the through hole 53 is provided at a position relatively close to the outer peripheral surface of the winding core 11, so that the trajectory of the wire 15 from the winding core 11 to the through hole 53 can be made short and simple.

[0068] On the other hand, since the through hole 53 is provided at a position eccentric to the central axis C, the wire 15 unwound from the through hole 53 advances upward while oscillating in the diametrical direction of the bobbin 10. Therefore, if the position above the through hole 53 where the wire 15 is pulled is too close to the through hole 53, the swing angle when the wire 15 oscillates in the diametrical direction of the bobbin 10 increases, and the load on the wire 15 increases, and the resistance when the wire 15 is pulled may increase. In addition, if the unwound position where the wire 15 leaves the winding core 11 and the position above the through hole 53 where the wire 15 is pulled are significantly separated on opposite sides (diagonally) across the central axis C, resistance that hinders smooth rotation of the rotating part 22 may act, or the wire 15 may come into contact with the first flange part 12. Therefore, it is desirable that the position above the through hole 53 where the wire 15 is pulled is spaced a predetermined distance or more from the through hole 53 in the axial direction, and is not too eccentric from the central axis C in the radial direction.

[0069] 8, a wire rod drawing jig 60 according to the third embodiment has a shaft 61 at a fixing portion 21, and an insertion portion 62 having a truncated cone shape whose outer diameter gradually decreases toward the tip side. The shaft 61 does not have a portion corresponding to the stopper 26.

[0070] In the wire drawing method using the wire drawing jig 60, in the fixing part attachment step, the insertion part 62 of the shaft 61 is inserted into the through hole 14 of the bobbin 10. When the insertion part 62 is inserted to a position where the outer diameter of the insertion part 62 is larger than the inner diameter of the through hole 14, further insertion is restricted. Then, when a force is applied in the insertion direction until the insertion part 62 is pressed into the through hole 14, the fixing part 21 is fixed to the bobbin 10.

[0071] The wire rod drawing jig 60 has an insertion portion 62 on the shaft 61, the outer diameter of which gradually changes as it advances in the axial direction, so that the fixing portion 21 can be attached and fixed to bobbins 10 having different sizes of inner diameters of the through holes 14. In other words, one type of wire rod drawing jig 60 can be commonly used for a plurality of types of bobbins 10 having different standards of the through holes 14.

[0072] In a wire rod drawing jig 70 of the fourth embodiment shown in Fig. 9, the fixing part 21 is provided with an attachment part 71 attached to the outside of the first flange part 12. The attachment part 71 has a lid-like shape that covers the outer peripheral surface to the end face (upper surface) of the first flange part 12, and is fixed to the outer surface of the first flange part 12 by a predetermined method. The attachment part 71 can be fixed to the first flange part 12 by various methods such as close contact by fitting, adhesion by adhesive, attachment using adhesive tape, screwing with male and female screws, and fastening using a separate member such as a clip.

[0073] A shaft 72 protrudes upward from the center of the fixed part 21. The shaft 72 rotatably supports the main body 27 of the rotating part 22 via a bearing 23. The shaft 72 is not inserted into the through hole 14.

[0074] In the wire drawing method using the wire drawing jig 70, in the fixing part attachment step, the attachment part 71 is attached and fixed to the first flange part 12. Since the attachment is to the first flange part 12, the wire drawing jig 70 can be attached to a type of bobbin that does not have a through hole such as the through hole 14. In other words, the present invention is applicable to bobbins that do not have a through hole.

[0075] As described above, according to the wire rod unwinding jig and the wire rod unwinding method of each embodiment, a mechanism for rotatably supporting the bobbin, a pulley for guiding the wire rod, etc. are not required, and the wire rod unwinding work can be performed with a space-saving configuration by simply attaching the wire rod unwinding jig to the bobbin. The wire rod unwinding jig is compact and easy to carry, and can be removed from the bobbin after use and reused for the next work. Therefore, the wire rod unwinding jig of each embodiment can be operated at low cost and without restrictions on the usage environment.

[0076] In addition, the wire is passed through a through hole in the rotating part of the wire pulling-out jig, and the rotating part is rotated to match the wire pulling-out position to pull out the wire from the core. This makes it possible to pull out the wire smoothly without it getting caught on the flange of the bobbin, without the need for the complicated operation of manually rotating the wire in the circumferential direction of the core.

[0077] The embodiments of the present invention are not limited to the above-mentioned embodiments and modifications, and may be modified, substituted, or altered in various ways without departing from the spirit of the technical idea of ​​the present invention. Furthermore, if the technical idea of ​​the present invention can be realized in a different way due to technological progress or a derived technology, the present invention may be implemented using that method. Therefore, the claims cover all embodiments that may be included within the scope of the technical idea of ​​the present invention. [Industrial Applicability]

[0078] As described above, the wire pulling-out jig and wire pulling-out method of the present invention can smoothly and efficiently pull out a wire from a bobbin in a space-saving manner without requiring complicated manual operations, and are useful in various technical fields where predetermined tasks are performed by pulling out a wire in a limited working space. [Explanation of symbols]

[0079] 10: Bobbin 11: Core 12: First flange 13: Second flange 14:Through hole 15: Wire rod 17: Placement surface 20: Wire drawing jig 21:Fixed part 22: Rotating part 23: Bearing 24: Shaft 25: Slit 26: Stopper 27: Main body 28: Connection 29: Inner ring 30: Outer ring 31: Ball 32:Protrusion 33:Through hole 331:Introduction hole 332: Outlet hole 40: Wire drawing jig 41:Through hole 411:Introduction hole 412: Outlet hole 50: Wire drawing jig 51: Main body 52: Lateral protrusion 53:Through hole 60: Wire drawing jig 61: Shaft 62: Insertion section 70: Wire drawing jig 71: Mounting part 72: Shaft C: Central axis

Claims

1. a winding core around which the wire is wound in a circumferential direction; a first flange portion fixed to one end of the winding core; a second flange portion fixed to the other end of the winding core; A wire drawing jig for drawing out a wire from a bobbin having the wire, A fixing portion fixed to the bobbin; a rotating part that is rotatably connected to the fixed part, has a through hole through which the wire rod passes, and rotates in accordance with a position at which the wire rod is unwound from the winding core when the wire rod that has passed through the through hole is pulled and drawn out from the winding core; A wire drawing jig comprising:

2. A wire drawing method using the wire drawing jig according to claim 1, a fixing portion attaching step of fixing and attaching the fixing portion to the bobbin; a wire threading step of threading the wire wound around the winding core through the through hole of the rotating part; a drawing step of pulling the wire rod that has passed through the through hole to rotate the rotating part in accordance with a payout position of the wire rod, thereby drawing the wire rod from the winding core; The wire drawing method includes the steps of:

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