JP2003217960A - Winding machine for coil, and method of manufacturing the coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent loosening of coil strand. <P>SOLUTION: The coil strand W, led out of a coil strand body, is wound around a bobbin B via a plurality of pulleys 10. Only the pulley, just in front of the bobbin B among the pulleys 10 is defined as a back-tension pulley 10A and the pulley just in front of the back tension pulley 10A is defined as the tension pulley 10B. The back tension pulley 10A is energized in the direction of isolation from the bobbin B with a tensile spring 14, to give a tensile force to the coil strand W. The tension pulley 10B is restricted in its rotation with an electromagnetic brake mechanism, to give tensile force to the coil strand W. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil winding machine and a coil manufacturing method used for winding a coil wire around a bobbin.

[0002]

2. Description of the Related Art Generally, when winding a coil wire around a bobbin, a coil winding machine is used, and a plurality of coil wires drawn from a coil wire matrix are used. The pulley is used to change the direction and wind it around the bobbin. In this winding machine, a tension is applied to the coil wire by a predetermined mechanism in order to prevent the coil wire from slackening before it reaches the bobbin from the mother body. The coil wires are arranged and wound. However, the conventional winding machine is apt to lack the tension applied to the coil wire, and this tendency is remarkable especially in the case where the coil wire has a large wire diameter.

The present invention was completed in view of the above circumstances, and an object thereof is to prevent slack of a coil wire.

[0004]

As a means for achieving the above object, a coil winding machine according to the invention of claim 1 winds a coil wire drawn from a coil wire body around a bobbin. A coil winding machine for turning, wherein a plurality of pulleys are provided between the coil wire matrix and the bobbin, and one of the pulleys immediately before the bobbin serves as a biasing means. A back tension pulley that is provided with the biasing means and applies a tension to the coil wire by being biased in a direction away from the bobbin, and is one of the pulleys on the upstream side of the back tension pulley. Is provided with a braking mechanism, and is a tension pulley that applies tension to the coil wire by braking the rotation by the braking mechanism. Having.

The coil manufacturing method according to the invention of claim 2 is
A coil manufacturing method for winding a coil wire drawn from a coil wire body around a bobbin using a coil winding machine having a plurality of pulleys, wherein a back tension pulley immediately before the bobbin is attached to the bobbin. The tension is applied to the coil wire by urging it in a direction away from the bobbin by the urging means, and the rotation of the tension pulley on the upstream side of the back tension pulley of the pulleys is braked by a braking mechanism. This is characterized in that the coil wire is wound around the bobbin while applying tension to the coil wire.

[0006]

<Operation and effect of the invention><Invention of claim 1 and claim 2
Invention> The coil wire drawn from the coil wire matrix is
After passing through a plurality of pulleys, it is wound around a bobbin. At this time, the back tension pulley is urged by the urging means in the direction away from the bobbin, so that tension can be applied to the coil wire. Moreover, by braking the rotation of the tension pulley by the braking mechanism, it is possible to apply further tension to the coil wire. Accordingly, it is possible to reliably prevent the coil wire from being loosened, and thus it is possible to wind the coil wire in a state of being aligned with the bobbin.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the coil winding machine shown in this embodiment uses a coil wire W drawn from a coil wire matrix (not shown) via a plurality of pulleys 10 to form a bobbin. It is designed to be wound around B. A winding mechanism (not shown) for drawing the coil wire W from the coil wire mother body side and winding the coil wire W around the bobbin B is provided in the winding machine body that constitutes this coil winding machine, and each pulley 10 is The rotatably supported pulley 10 immediately before the bobbin B is a back tension pulley 10A provided with a biasing means. The back tension pulley 10A is provided immediately before the back tension pulley 10A (upstream side in the flow direction of the coil wire W). Tension pulley 10B that has a braking mechanism
It is said that.

Each pulley 10 is formed in a disk shape, and a groove 11 for hanging the coil wire W is formed on the peripheral surface of the pulley 10. The pulling direction of the coil wire W from the coil wire mother body side is formed in each pulley 10. And the direction of pulling out to the bobbin B side can be changed. Although only three pulleys 10 are shown in FIG. 1 for simplification of the drawing, it is of course possible to provide more than three.

The bobbin B has a structure in which a pair of flanges are provided on both ends of a cylindrical body so that the coil wire W is wound around the peripheral surface of the cylindrical body by a winding mechanism. . In this winding mechanism, the coil wire W can be wound around the columnar body by rotating the bobbin B around the axis, and further, the bobbin B is repeatedly reciprocated right and left along the axial direction to thereby reciprocate the coil. The wire W can be wound without deviation in the axial direction.

The back tension pulley 10A is arranged almost directly above the bobbin B, and the right end is provided at the left end of the arm 12 pivotally supported by the winding machine body. The arm 12 is swingable about a support shaft 13 provided on the left side of the tension pulley 10B in the winding machine main body, and the back tension pulley 10A moves along with the swing operation of the arm 12. The bobbin B and the tension pulley 10B can be displaced so as to come into contact with and separate from the bobbin B and the tension pulley 10B. A hook portion 15 for hooking a lower end portion of a tension spring 14 which is an urging means is provided substantially at the center of the arm 12, and the tension spring 14 is
The upper end portion is fixedly supported by the fixed support portion 16 of the winding machine body. The back tension pulley 10A is supported by the tension spring 14 at an initial position which is substantially horizontal to the support shaft 13, and is displaced from this initial position in a direction approaching the bobbin B and the tension pulley 10B. The tension spring 14 elastically expands to accumulate an elastic restoring force. When the elastic restoring force is accumulated in the tension spring 14, the back tension pulley 10A moves to the bobbin B or the tension pulley 10A.
Since it is urged in the direction away from B, tension can be applied to the coil wire W applied to the back tension pulley 10A.

The tension pulley 10B is disposed at a position diagonally lower right than the support shaft 13 of the arm 12 in the drawing, and has an outer diameter dimension which is equal to that of the back tension pulley 10B.
It is set larger than A. Tension pulley 10
As shown in FIG. 2, B is integrally rotatably provided with respect to a rotary shaft 17 rotatably supported with respect to the winding machine main body, and the rotary shaft 17 is provided for braking rotation. An electromagnetic brake mechanism is provided as the braking mechanism of. The electromagnetic brake mechanism is an annular electromagnetic coil 18 fixed to the main body of the winding machine and surrounding the rotary shaft 17, a brake pad 19 integrally provided on the electromagnetic coil 18, and a brake pad 19 And a brake disc 20 which is disposed close to the rotary shaft 17 and is integrally rotatable with the rotary shaft 17. The brake disc 20 is provided by a mechanism (not shown) so that it can be displaced relative to the rotary shaft 17 only in the axial direction, and an annular receiving groove 21 for receiving the brake pad 19 is formed on the left side surface thereof. ing. Electromagnetic coil 1
A current is supplied from a predetermined electric circuit to 8, and the brake disc 20 is attracted to the left side in FIG. 2 along the axial direction of the rotary shaft 17 by the electromagnetic force generated by the flow of the current. You can do it. Then, with the rotating shaft 17 rotated, the brake disc 20
Contacting the brake pad 19, both
A frictional resistance is generated between them, and the brake disc 20 can be braked by this frictional resistance. This electromagnetic coil 1
Since the electromagnetic force of 8, that is, the attraction force to the brake disc 20, is proportional to the magnitude of the amount of current, the electromagnetic coil 1
By adjusting the amount of current flowing to 8, the brake disc 2
It is possible to adjust the suction force with respect to 0, that is, the magnitude of the frictional resistance generated between the brake pad 19 and the brake pad 19.
Also, the number of rotations of the tension pulley per unit time can be adjusted. Then, the rotation of the tension pulley 10B is braked by the electromagnetic brake mechanism, and the feeding amount of the coil wire W to the bobbin B side per unit time is made smaller than the winding amount by the bobbin B, whereby the coil wire W The tension can be applied to the.

The present embodiment has the above-mentioned structure, and its operation will be described next. In order to wind the coil wire W around the bobbin B, first, the bobbin B is set in the winding mechanism, and the coil wire W pulled out from the coil wire mother is attached to each pulley 10 as shown in FIG. The tip of the groove 11 is hooked on the bobbin B while being hooked on the groove 11. Then, as the bobbin B is rotated by the winding mechanism by operating the winding machine, each pulley 10 is rotated and the coil wire W is wound around the cylindrical body of the bobbin B. . At this time, since the bobbin B is rotated and the bobbin B is repeatedly reciprocated left and right along the axial direction,
The coil wire W can be wound substantially uniformly in the axial direction of the bobbin B.

In the process of winding the coil wire W around the bobbin B, the back tension pulley 10A is pulled toward the bobbin B by the winding force of the coil wire W by the winding mechanism, so that the back tension pulley 10A is pulled. While elastically extending the spring 14, the bobbin B from the initial position
Also, the support shaft 13 is pivotally displaced counterclockwise in the drawing so as to approach the tension pulley 10B. In this state, the back tension pulley 10A is urged in a direction away from the bobbin B by the elastic restoring force accumulated in the tension spring 14, whereby the coil wire W hung on the back tension pulley 10A has a predetermined length. Tension is applied.

Furthermore, when the tension pulley 10B is braked by the electromagnetic brake mechanism described above and the feeding amount by the tension pulley 10B is made smaller than the winding amount of the coil wire W by the bobbin B per unit time, the winding mechanism. As a result, the back tension pulley 10A is more strongly pulled to the bobbin B side, so that the tension spring 14 further extends and accumulates a larger elastic restoring force. Therefore, a larger tension is applied to the coil wire W. The braking of the tension pulley 10B is appropriately performed according to the winding state of the coil wire W on the bobbin B, etc., in order to apply an appropriate tension to the coil wire W.

As described above, the tension spring 14 is always extended more than the natural state during the winding process, so that the coil wire W can be maintained in a state in which a tension of a certain level or more is applied, and the coil wire W is maintained. It is possible to reliably prevent the W from becoming loose. Accordingly, the coil wire W can be wound around the bobbin B in an aligned state. At the end of winding, the pulleys 10 may rotate slightly even after the rotation of the bobbin B is stopped, but even in that case, the tension spring 14 appropriately elastically restores the back tension pulley 10A so that the bobbin B or Tension pulley 1
Since it is displaced in the direction away from 0B, the coil wire W is prevented from being loosened. Note that the larger the diameter of the coil wire W wound around the bobbin B, the larger the tension that must be applied to the coil wire W to prevent the slack, but in that case, the tension spring 14
Can be changed to a stronger one, or the amount of current flowing through the electromagnetic coil 18 can be increased to increase the braking force on the tension pulley 10B, and the like can be appropriately dealt with.

As described above, according to this embodiment,
By tensioning the back tension pulley 10A by the tension spring 14 in the direction away from the bobbin B, tension can be applied to the coil wire W, and further, the rotation of the tension pulley 10B can be braked by the electromagnetic brake mechanism. Since a large tension can be applied to the coil wire W, it is possible to reliably prevent the coil wire W from being loosened, so that the coil wire W is wound around the bobbin B in an aligned state. be able to.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention. (1) In the above-described embodiment, the tension spring is used as the biasing means, but a compression spring or the like may be used instead. (2) In the above-described embodiment, the case where the electromagnetic brake mechanism is used as the braking mechanism has been described, but the rotation of the tension pulley may be braked by directly sandwiching the tension pulley with a pair of brake pads.

(3) In the above-described embodiment, the tension pulley is arranged just before the back tension pulley. However, another pulley is arranged just before the back tension pulley and the tension is provided upstream of the pulley. The present invention also includes a pulley arranged. (4) In the above-described embodiment, the case where the position where the back tension pulley is horizontal with respect to the support shaft is set as the initial position, but the position is not limited to such a positional relationship, and may be set according to the arrangement of each component. Can be set to.

[Brief description of drawings]

FIG. 1 is a schematic view of a coil winding machine according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an electromagnetic brake mechanism of a tension pulley.

[Explanation of symbols]

10 ... pulley 10A ... Back tension pulley 10B ... tension pulley 14 ... Extension spring (biasing means) 18 ... Electromagnetic coil (braking mechanism) 19 ... Brake pad (braking mechanism) 20 ... Brake disc (braking mechanism) B ... Bobbin W ... Coil wire

Claims (2)

[Claims] 1. A coil winding machine for winding a coil wire drawn from a coil wire body on a bobbin, wherein a plurality of coil winding machines are provided between the coil wire body and the bobbin. A pulley is provided, and the pulley immediately before the bobbin is provided with a biasing means and is biased by the biasing means in a direction away from the bobbin to impart tension to the coil wire. A tension pulley that is a back tension pulley, and one of the pulleys on the upstream side of the back tension pulley is provided with a braking mechanism and applies rotation to the coil wire by braking the rotation by the braking mechanism. A coil winding machine characterized by being said. 2. A coil manufacturing method for winding a coil wire drawn from a coil wire body around a bobbin using a coil winding machine having a plurality of pulleys, wherein a coil wire immediately before the bobbin of the pulleys is provided. While applying tension to the coil wire by urging the back tension pulley in a direction away from the bobbin by urging means,
Among the pulleys, a tension pulley on the upstream side of the back tension pulley is wound around the bobbin while applying tension to the coil wire by braking the rotation of the tension pulley by a braking mechanism. A method for manufacturing a coil.