JPH07109070A - Wire tension controller - Google Patents

Abstract

PURPOSE:To control the tension of a wire constant by varying an amount of compression in a pressure spring of a damping device in linkage with the rotation of a tension arm at a time when a turning angle of this tension arm being energized by the spring is varied according to a variation in wire tension. CONSTITUTION:In a wire tension controller for a coil winding machine or the like available in the manufacture of coil parts, etc., if tension in a wire 79 at the supplied side is increased to some extent, a tension arm 64 goes down, and thereby tensile force of a balance spring 73 is also increased by rotation of a pulley 68 on a turning shaft 65 via finishing gut. In addition, a cap 75 of a pin 61 is pulled downward by rotation of a pulley 67 via finishing gut 76, and pressure in a brake pressure spring 62 is abated. With this constitution, drawing resistance of a material roll winding side wire is lowered, maintaining the setting wire tension. On the other hand, when the wire tension at the supplied side is reduced and the tension arm 64 went up, the tensile force of the balance spring 73 is lowered, while pressure in the brake pressure spring 62 is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire tension control device such as a coil winding machine used for manufacturing coil parts, and more particularly to a wire tension control device using a mechanical variable brake.

[0002]

2. Description of the Related Art A conventional wire tension control device will be described with reference to FIGS. FIG. 5 shows a weight type brake tension control device 1. The support 3, which is provided on the side surface of the brake tension control device 1, is provided with columns 3, 3, 3, 3 upright, and the columns 3, 3, 3, 3 have circular felts 4 having circular holes or circular brake shoes. Two pieces 5, 5 and 5 are mounted respectively, and weights 6, 6, 6 and 6 are placed on top of them.

Further, a metal fitting 9 is provided so as to project from the brake support portion 2 toward the wire supply side, and a line guide 10 is fixed to the tip of the metal fitting 9. The guide roller 1 is provided on the side surface of the support plate 11.
The rotary shafts 15 of the tension arms 2 and 12, the tension arm 13, and the balance arm 14 are mounted on the shaft. A line guide 16 is projectingly provided at the tip of the tension arm 13. or,
One end of the tension spring 18 is fixed to the back surface of the long hole 17 provided on the side surface of the support plate 11, and the tex 19 is connected to the other end of the tension spring 18, and the balance arm 14 is connected to the balance arm 14 via the guide roller 20 on the back surface. Are connected. Further, a stopper 21 is arranged above the rotary shaft 15 of the support plate 11 to regulate the repelling angle of the tension arm 13.

The unwound wire 22 is inserted through the line guide 10 and between the felts 4, 4 and between the brake shoes 5, 5 ,.
12 and the tip line guide 16 of the tension arm 13 is inserted and introduced into a winding machine (not shown) on the supply side. Thus, the wire tension between the supply-side winding machine and the brake shoe 5 is obtained by the balance between the tensile force of the tension spring 18 and the braking force of the weight 6. The tension force of the tension spring 18 is adjusted by moving the fixed side end portion of the tension spring 18 along the elongated hole 17, and the braking force of the felt 4 and the brake shoes 5, 5, 5 is weights 6, 6, ... It will be adjusted by replacing.

FIG. 6 shows an electric hysteresis brake tension control device 31. A line guide 33 is attached to a side surface of a support plate 32 of the brake tension control device 31, and a felt control device 34, a guide roller 35, and a brake pulley 36 are mounted on the shaft. Tension arm 37
Is attached to a rotary shaft 40 together with a balance arm 38 and an angle sensor 39, and a line guide 41 is provided at the tip of the tension arm 37.

Further, an adjusting screw is fastened to the long hole 42 opened in the support plate 32, one end of the balance spring 43 is locked to the adjusting screw, and the other end is attached to the balance arm 38.
The unwound wire 44 passes through the line guide 33, the braking device 34, the guide roller 35, and the brake pulley 36, passes through the line guide 41, and is introduced into a winding machine (not shown) on the supply side. It

The rotation angle of the tension arm 37 fluctuates due to the wire tension from the supply side, and this angle change is electrically detected by the angle sensor 39, and the braking force of the brake pulley 36 is electrically hysteresis device. (Not shown).

[0008]

In the conventional wire tension control apparatus, in the case of the weight type, since a constant braking force is constantly applied by the weight, the wire tension rapidly increases during static friction at the time of initial rising. To do. Therefore, in the case of a wire having a small wire diameter, there is a possibility that a wire breakage accident may occur. Further, in the case of an electric tension control device, the use of an angle sensor, a hysteresis brake, an electric circuit, etc., complicates the structure and raises the cost. Therefore, there is a technical problem to be solved in order to obtain a wire tension control device that has a simple structure and suppresses the variation of the wire tension as much as possible, and that has a stable tension control performance at a low cost. The invention aims to solve the above problems.

[0009]

The present invention is proposed to achieve the above object, and is a wire tension controller for controlling the tension of a wire supplied to a coil winding machine or the like. Is provided with a tension arm and a brake shoe support portion, a pin is loosely inserted into a hole opened in the brake shoe support portion to support the brake shoe, and a spring is interposed between the brake shoe and the head portion of the pin. Then, the brake shoe is urged toward the brake shoe support portion side to form a braking device, and the tension arm and the pin are connected by a wire rod such as Tegus, and the rotation angle of the tension arm and the spring In conjunction with the amount of compression,
The present invention provides a wire tension control device characterized in that the tension of the wire is controlled to be constant by pulling out the wire via the braking device and the tension arm.

[0010]

[Operation] According to the fluctuation of the wire tension on the wire winding side,
The rotation angle of the tension arm biased in one direction by the spring changes. The pin of the braking device, which is connected to the tension arm by a wire such as Tegus, is pushed and pulled by the rotation of the tension arm, and the compression amount of the pressure spring of the braking device that is compressed by the head of the pin is linked to the rotation of the tension arm. And change. The connection is made so that the compression amount of the pressure spring decreases when the wire tension increases. As a result, the tension of the wire drawn between the brake shoes of the braking device and via the tension arm is automatically controlled to a constant value determined by the spring force of the spring of the tension arm and the spring force of the pressure spring of the braking device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 1 and 2 show a mechanical variable brake tension control device 51. In this brake tension control device 51, an L-shaped metal fitting 53 is fixedly mounted on a side surface of a support plate 52, and a pin 54 is erected on the L-shaped metal fitting 53 to form two circular felts 55 having circular holes. 55 and a weight 56 are attached to the pin 54. Further, a guideline 57 is provided at the end of the L-shaped metal fitting 53 on the side of the original winding wire supply. A block 58 is fixedly provided in front of the L-shaped metal fitting 53 (left in the figure), a vertical hole is opened in the block 58, and a bush 59 is press-fitted in the block 58. Glue. Then, the brake pressure spring 62 and the brake shoe 63 are loosely inserted in the pin 61, and the pin 61 is loosely inserted in the vertical hole of the block 58.

A rotary shaft 65 of a tension arm 64 is arranged in front of the block 58, and the tension arm 64 is attached to the rotary shaft 65 via a support 66. As shown in FIG. 2, the rotary shaft 65 has pulleys 67 and 68 fixed to both ends thereof and is rotatably supported by a bearing 69. The bearing 69 is fixed to the support plate 52 via a flange 70. Moreover, FIG.
As shown in FIG. 5, a support 71 is erected on the back surface of the support plate 52, and a hook 72 is attached to the upper part of the support 71. Then, one end of the balance spring 73 is locked to the hook 72.
One end of the gut 74 is fixed to the other end of the balance spring 73, and the other end of the gut 74 is fixed to the outer peripheral surface of the pulley 68. Further, one end of the Tegs 76 is fixed to the lower surface of the cap 75 fixed to the pin 61. This gut 76 is wound around the upper surface side of the pulley 67 via the guide roller 77, pulled out from the lower surface side and passed through the upper guide roller 78, and the other end is inserted into the center hole of the pin 61, and is attached to the cap 75. Settle down again. When using the brake tension control device 51, first, the raw fabric winding wire 79 is attached to the line guide 5
7 and then between the felts 55, 55 and between the brake shoes 60, 63, and then the guide roller 8
It is introduced from the tip guide 82 of the tension arm 64 to the winding machine (not shown) on the supply side via 0, 81.

When the wire tension on the supply side increases,
The tension arm 64 descends, and due to the change in the angle of the rotating shaft 65, the pulley 68 moves through the gusset 74, and the balance spring 7
Increase the tensile force of 3. The rotation of the pulley 67 pulls the cap 75 of the pin 61 downward via the tex 76, pulls out the pin 61, and the pressure of the brake pressure spring 62 interposed between the cap 75 and the lower brake shoe 63. To reduce. Thereby, the pull-out resistance of the original winding side wire is reduced and the set wire tension is maintained. On the other hand, when the wire tension on the supplied side decreases, the tension arm 6
4 rises, and the pulley 68 reduces the tensile force of the balance spring 73 via the gusset 74 due to the change in the angle of the rotating shaft 65. At the same time, the pulley 67 is connected to the pin 6 via the gusset 76.
The cap 75 of No. 1 is pulled upward to compress the brake pressure spring 62 to increase the pressure of the brake pressure spring 62. As a result, the wire pullout resistance from the original winding wire is increased and the set wire tension is maintained.

3 and 4 show another embodiment of a mechanical variable brake tension control device 85. The pins 86 are arranged in the horizontal direction, and the brake shoes 60, 63 and the pin 8 having the same structure as those shown in FIGS. 1 and 2 are provided.
6, has a cap 75. One end of each of the gussets 87 and 88 is fastened to each side of the cap 75,
Denoted at 7 and 88 are pulleys 9 of the same diameter provided at both ends of the rotating shaft of the tension arm 64 via guide rollers 89 and 90.
Each of them is wound around 1, 92 one turn or more and fastened. Tegs 8
The winding directions of 7, 89 are opposite to each other at the front and back pulleys 91, 92, and the front side pulley 91 shown in FIG. 3 pulls out the Tegus 87 from the upper side, and the back side pulley 92 pulls out the Tegus 89 from the lower side. ing.

Although a detailed description of the operation of this wire tension control device is omitted, the compression amount of the brake pressure spring 62 fluctuates in conjunction with the vertical movement of the tension arm 64, and the braking force of the brake shoes 60, 63 is increased. It is the same as that shown in FIG. 1 and FIG. By changing the length of the tension arm 64, the ratio of the radii of the pulleys 67, 68, 91, 92 and the combination, etc., optimum tension control according to various situations is possible, and the mechanical structure is simple. Therefore, the tension can be easily set. Further, the present invention should not be limited to the above-mentioned embodiment, but can be applied to the tension control of various wire rods and filaments, and the present invention can be modified without departing from the spirit of the present invention. It is natural.

[0016]

As described in detail in the above one embodiment, the present invention mechanically and automatically controls the tension of the wire, so that the tension of the wire is different from the conventional one in which a constant braking force is mechanically applied. Fluctuations are suppressed and the stability of wire supply is improved.
Further, the invention has various kinds of effects such that the structure is simpler than that of the electric tension control device and it contributes to the reduction of the manufacturing cost of the coil parts and the like.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of another embodiment of the present invention.

FIG. 4 is a plan view of FIG.

FIG. 5 is a front view showing a conventional example.

FIG. 6 is a front view showing another conventional example.

[Explanation of symbols]

 51,85 Wire tension control device 52 Support plate 60,63 Brake shoe 61,86 pin 62 Spring 64 Tension arm 76,87,88 Tegus 79 wire

Claims (1)

[Claims] 1. A wire tension control device for controlling the tension of a wire supplied to a coil winding machine or the like, wherein a tension arm and a brake shoe support portion are provided on a support plate, and a hole opened in the brake shoe support portion. A pin is loosely inserted to support the brake shoe, a spring is interposed between the brake shoe and the head of the pin, and the brake shoe is biased toward the brake shoe support portion side to form a braking device. In addition, the tension arm and the pin are connected to each other by a wire such as Tegs, and the rotation angle of the tension arm and the compression amount of the spring are interlocked with each other to pull out the wire through the braking device and the tension arm. Accordingly, the wire tension control device is configured to control the tension of the wire to be constant.