JPH1121017A - Tensile force control device for wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the tensile force of wires supplied to a winding machine, etc., constant, and thereby stabilize the supply of the wires. SOLUTION: In order for the tensile force of a wire 20 laid over between a pair of guide rollers 31, 32 on a rotary arm 30 directly connected to the output shaft 29 of a motor 28 for transmitting fixed torque, to be maintained constant, the rotating position of the rotary arm 30 is tetected, and the rotating speed of a motor 38 for rotating-driving a supply roller 36 is controlled in response to the detected position.

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, and more particularly to a wire tension control device suitable for installation in a wire supply section of a winding machine, a lead forming machine, or a ribbon material processing machine. .

[0002]

2. Description of the Related Art FIG. 6 shows a winding machine using a conventional tension control device. Here, the wire is supplied in a cylindrical form, and the wire is drawn out from the upper end thereof.
The wire 1 passes through a tension control unit 2, where the tension of the supplied wire 1 is controlled, and the wire 1 is guided by guide rollers 3 and 4 and supplied to a nozzle 5. The nozzle 5 cooperates with a hook (not shown) to wind the wire on the bobbin 6.

As shown in FIG. 7, a tension control unit 2 for applying tension to a wire 1 has four linear guides 11, 12,
13 and 14, and guide rollers 15, 1 movably in the length direction of these linear guides 11 to 14, respectively.
6, 17, and 18 are supported. The guide rollers 15, 16, 17, and 18 are linear guides 11 to 14.
F ₁ , alternately in the opposite direction by a spring built in
The wires 1 are pushed by the forces of F ₂ , F ₃ , and F ₄ , and the wire 1 stretched over such guide rollers 15 to 18 is supplied in a state where an appropriate tension is applied. ing.

[0004]

As described above, the conventional tension control device is configured as shown in FIG. 7, and includes guide rollers 15 to 18 that move along linear guides 11 to 14. -18 were urged by a spring or the like to alternately press. F ₁ with respect to the guide rollers 15 to 18 by Here the _{spring, F 2, F 3, F} 4
When the springs that generate these forces are greatly deformed, the elastic restoring force of the springs increases. By allowing the guide rollers 15 to 18 to move freely, the four guide rollers 15 to 18 are stabilized on the linear guides 11 to 14 at a position where the tension is balanced.

However, according to such tension control, the tension is controlled by the forces F ₁ , F ₂ , F ₃ and F ₄ acting on the guide rollers 15, 16, 17, and 18. Cannot be controlled to keep the constant at the set target value. In addition, when the tension on the supply side and the feed side of the wire 1 is reduced, there is a possibility that the control becomes impossible.

[0006] The present invention has been made in view of such a problem, and it is possible to control the tension to be constant, and even if the tension on the supply side and the feed side of the wire is reduced, An object of the present invention is to provide a tension control device for a wire rod capable of surely controlling the tension.

[0007]

According to the present invention, there is provided a rotary arm which is rotatably supported and has guide rollers mounted on both ends in a longitudinal direction of which a wire is wound, and a rotary arm of the rotary arm. A tension control device for a wire rod, comprising: a rotation position detection unit that detects a position; a supply roller that supplies the wire; and a control unit that controls a rotation speed of the supply roller in accordance with the detection of the rotation position detection unit. It is about.

Accordingly, when the tension of the wire changes, the rotational position of the rotary arm changes accordingly. Such a change in the rotation position is detected by the rotation position detection means, and the rotation speed of the supply roller is controlled via the control means in conjunction with the detection of the rotation position detection means, whereby the rotation The rotational position of the arm is adjusted to return to the original position, and the tension is controlled to a constant value. Here, the wire is not limited to a wire having a circular cross section, but also includes a wire having a square, a rectangle, and various other irregular shapes, and also includes a wire in a ribbon shape having a flat rectangular cross section.

A guide roller may be rotatably supported at each end of the rotary arm, and the rotary arm may be rotatably supported by a support shaft at an intermediate position in a longitudinal direction of the rotary arm. The rotating arm may be attached to a means for generating torque, and the torque may be transmitted to the rotating arm via the support shaft. Alternatively, the supply roller may be driven by a motor, and the rotation speed of the motor may be controlled via a rotation speed control unit according to the detection of the rotation position detection unit.

[0010] A pressure roller may be arranged close to the supply roller, and the wire may be supplied while being sandwiched between the supply roller and the pressure roller. Further, a pressure bonding belt may be arranged near the supply roller, and the wire may be supplied while being sandwiched between the supply roller and the pressure belt. Alternatively, a supply belt may be wound around the supply roller, the supply belt may be pressed against a pressure roller, and the wire may be supplied while being sandwiched between the pressure roller and the supply belt.

[0011]

FIG. 1 shows a principle of a winding machine using a wire tension control device according to an embodiment of the present invention. Here, the wire 20 wound in a cylindrical shape is pulled out from the upper end side, the tension is controlled to a constant value by a tension control unit 21, the guide is fed to a nozzle 23 through a guide roller 22, and the bobbin 24 is
The wire rod 20 is wound around. Here, the bobbin 24 may be, for example, a bobbin of a deflection yoke of a cathode ray tube.
3, the wire 20 is wound to form a deflection coil.

FIG. 2 shows a part of a tension control unit of such a winding machine. The tension control unit has a mounting housing 27 in which a torque generating device 28 composed of a motor is arranged. Have been. A rotating arm 30 is fixed to a tip of a rotating shaft 29 of the motor 28. The rotating arm 30 rotatably supports guide rollers 31 and 32 at both ends in the longitudinal direction thereof.

A supply roller 36 is disposed at a position separated from the rotary arm 30 by a predetermined distance. The supply roller 36 is directly connected to an output shaft of a motor 38 housed in a mounting housing 37. And supply roller 3
6, a pressure roller 39 is elastically pressed. Here, both the supply roller 36 and the pressure roller 39 are made of a flexible material, for example, rubber or soft plastic.

FIG. 3 shows a control circuit for controlling the motor 28 of the torque generating device and the motor 38 of the supply roller 36. Here, the motor 28 is driven by a motor driver 43 to generate a constant torque. The rotation phase on the output side of the motor 28 is detected by the pulse generator 44. The detection output of the pulse generator 44 is supplied to a rotation speed control circuit 45, and the control circuit 4
5, the control of the motor driver 46 is performed. The motor driver 46 drives the motor 38 to rotate, and adjusts the rotation speed in accordance with a control signal from the rotation speed control circuit 45.

In the above configuration, a constant torque is generated in the motor 28 by the motor driver 43. Moreover, a rotating arm 30 is provided on the output shaft 29 of the motor 28.
Is fixed, and the wire 20 is extended in an inverted Z-shape between the guide rollers 31 and 32 attached to both ends of the rotating arm 30 in the longitudinal direction. At a position where the rotational moment of the rotary arm 30 generated by the applied tension balances the torque of the motor 28, the rotary arm 30 stops.

When the tension applied to the wire 20 increases, the rotational moment applied to the rotary arm 30 by the tension of the wire 20 becomes larger than the torque of the motor 28.
The rotating arm 30 is rotated in a direction indicated by an arrow A in FIG. On the other hand, when the tension of the wire 20 decreases,
As the tension decreases, the rotational moment applied to the rotary arm 30 also decreases, and the rotary arm 30 rotates in the direction indicated by the arrow B to overcome the torque of the motor 28.

The pulse generator 44 detects such a change in the rotational position of the rotary arm 30 in the direction of arrow A or the direction of arrow B. The pulse generator 44 supplies a signal corresponding to the rotational position to the rotational speed control circuit 45. Therefore, the rotation speed control circuit 45 controls the rotation speed of the motor 38 via the motor driver 46. When the rotation arm 30 rotates in the direction indicated by the arrow A, that is, when the tension of the wire 20 increases, the rotation speed control circuit 45 controls the rotation speed of the motor 38 to increase. On the other hand, when the rotating arm 30 rotates in the direction indicated by the arrow B, that is, when the tension of the wire 20 decreases, the rotation speed control circuit 45
8 is controlled so that the rotation speed becomes slow. In this way, the rotation position of the rotation arm 30 is adjusted to be, for example, the rotation position shown in FIG. By such an adjustment, the tension of the wire 20 is always maintained at a constant value.

Accordingly, the wire rod controlled to have a constant tension by the tension control unit 21 is applied to the guide roller 22 shown in FIG.
Through the nozzle 23. The nozzle 23 cooperates with the hook with the wire 20 controlled at a constant tension to form the bobbin 2.
4 to form a deflection coil. Therefore, by using such a tension control unit 21, a high-quality deflection coil is formed.

As described above, the tension control unit constituting the tension control device according to the present embodiment is operated with a constant force or a function close to the constant force, so that the rotating arm 30 is operated.
For example, when the rotational position is in the position as shown in FIG. 2, the tension of the wire 20 is proportional to the torque of the motor 28,
It is possible to control the tension of the wire 20 to a tension corresponding to the torque of the motor 28.

The rotational position of the rotary arm 30 is detected by the pulse generator 44, and the rotational speed of the supply roller 36 is controlled based on the rotational position information of the rotary arm 30 obtained by the pulse generator 44.
When the rotary arm 30 rotates in the direction indicated by the arrow B, the rotation speed of the supply roller 36 is reduced, and the supply speed of the material is reduced. When the rotation arm 30 rotates in the direction of arrow A, the rotation speed of the motor 38 is controlled so that the rotation speed of the supply roller 36 increases, whereby the rotation arm 30 moves to the position shown in FIG. The feed of the wire 20 is controlled so as to stop apparently.

Therefore, according to such a tension control device,
It becomes possible to adjust the tension of the wire 20 to a state close to a constant by adjusting, for example, the winding machine that winds the wire 20 around the bobbin 24 by the nozzle 23 is not affected by the tension fluctuation,
The wire 20 having a constant tension can be stably wound. Therefore, the quality of the deflection coil wound on the bobbin 24 can be further stabilized, and a highly reliable deflection coil can be provided.

Such a tension control device can be widely applied to a winding machine of a deflection coil and other various winding machines. Furthermore, it can be applied to a lead forming machine. It can also be widely used for tension control of wires other than circular cross sections, and can be installed in the supply section of a ribbon processing machine.

Next, another embodiment will be described with reference to FIG. In the above-described embodiment, the wire 20 is supplied while being sandwiched between the supply roller 36 driven by the motor 38 and the pressure roller 39, but instead of such a configuration, as shown in FIG. Supply roller 36
The wire 20 may be sent out by using the pressure bonding belt 52.

That is, a pair of pulleys 50, 51 are rotatably arranged on the housing 37, and a pressure belt 52 is stretched between the pulleys 50, 51. To be crimped. Then, while the supply roller 36 is driven by the motor 38, the wire 20 is fed out while being sandwiched between the pressure bonding belt 52 and the supply roller 36.

FIG. 5 shows still another embodiment. In this embodiment, a supply belt 52 is stretched between a supply roller 36 driven by a motor 38 and a pulley 50, and such a supply belt 52 is pressed against a pressure roller 39. Then, the wire 20 is sent out while being sandwiched between the supply belt 52 and the pressure roller 39.

[0026]

As described above, the present invention provides a rotating arm which is rotatably supported and has guide rollers mounted on both ends in the longitudinal direction, on each of which a wire is wound.
Rotation position detection means for detecting the rotation position of the rotation arm,
The present invention relates to a wire tension control device including a supply roller that supplies a wire, and a control unit that controls a rotation speed of the supply roller in accordance with detection by a rotation position detection unit.

Therefore, according to such a control device, the control means controls the rotation speed of the supply roller so that the rotation position of the rotation arm is kept constant, so that the rotation speed of the supply roller is extended to the guide roller on the rotation arm. It is possible to make the tension of the wire rod constant.

According to a configuration in which the guide rollers are rotatably supported on both ends of the rotary arm, and the rotary arm is rotatably supported by the support shaft at an intermediate position in the longitudinal direction of the rotary arm. The tension of the wire can be maintained constant by controlling the rotation positions of the rotary arms provided with guide rollers on both ends on which the wire is wound, so as to be constant.

The rotating arm is attached to a means for generating torque, and according to the configuration in which the torque is transmitted to the rotating arm via the support shaft, the rotating arm is hung on the guide roller on the rotating arm. The tension of the delivered wire is controlled to a value corresponding to the torque applied to the rotating arm.

According to the configuration in which the supply roller is driven by the motor and the rotation speed of the motor is controlled via the rotation speed control means in accordance with the detection of the rotation position detection means, the rotation position of the rotary arm is controlled. Is always constant, thereby controlling the tension of the wire rod.

According to the configuration in which the pressure roller is disposed close to the supply roller and the wire is supplied while being pinched by the supply roller and the pressure roller, the wire is supplied while being pinched by the supply roller and the pressure roller. The supply speed of the supplied wire is controlled, whereby the tension of the wire is controlled.

According to the configuration in which the pressure belt is disposed close to the supply roller and the wire is supplied while being sandwiched between the supply roller and the pressure belt, the wire is supplied while being held between the supply roller and the pressure belt. The supply speed of the supplied wire is controlled so that the rotational position of the rotary arm is constant.

According to the configuration in which the supply belt is wound around the supply roller, the supply belt is pressed against the pressure roller, and the wire is supplied while sandwiching the wire between the pressure roller and the supply belt. By supplying the wire while sandwiching it with the belt and controlling the supply speed, it is possible to keep the rotation position of the rotating arm constant and thereby control the tension of the wire to be constant. Become.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the principle of a winding machine.

FIG. 2 is a perspective view of a main part of the tension control device.

FIG. 3 is a block diagram of a tension control device.

FIG. 4 is a front view of a wire supply section according to another embodiment.

FIG. 5 is a front view of a wire supply section according to still another embodiment.

FIG. 6 is a perspective view showing the principle of a conventional winding machine.

FIG. 7 is a front view of the tension control device.

[Explanation of symbols]

1 wire, 2 tension control unit, 3 guide roller, 5 nozzle, 6 bobbin, 11-14
{Linear Guide, 15-18 Guide Roller, 20}
{Wire}, 21} tension control unit, 22} guide roller, 23} nozzle, 24} bobbin, 27} mounting housing, 28} torque generator (motor), 2
9 ° rotating shaft, 30 ° rotating arm, 31, 32 °
Guide roller, 36 ‥‥ supply roller, 37 ‥‥ mounting housing, 38 ‥‥ motor, 39 ‥‥ pressure roller, 43
{Motor driver, 44} Pulse generator, 4
5 ‥‥ rotation speed control circuit, 46 ‥‥ motor driver, 5
0, 51 ‥‥ pulley, 52 ‥‥ pressure belt

Claims (7)

[Claims] 1. A rotating arm which is rotatably supported and has guide rollers attached to both ends in a longitudinal direction of which a wire is wound, and a rotating position detecting means for detecting a rotating position of the rotating arm. A tension control device for a wire rod, comprising: a supply roller that supplies the wire rod; and a control unit that controls a rotation speed of the supply roller in accordance with the detection of the rotation position detection unit. 2. A guide roller is rotatably supported on each end of the rotary arm, and the rotary arm is rotatably supported by a support shaft at an intermediate position in a longitudinal direction of the rotary arm. Claim 1 characterized by the following:
A tension control device for a wire rod according to claim 1. 3. The rotating arm according to claim 2, wherein the rotating arm is adapted to be attached to a torque generating means, and the torque is transmitted to the rotating arm via the support shaft. Wire tension control device. 4. The apparatus according to claim 1, wherein said supply roller is driven by a motor, and a rotation speed of said motor is controlled via a rotation speed control means in accordance with detection of said rotation position detection means. A tension control device for a wire rod according to claim 1. 5. The wire rod according to claim 1, wherein a pressure roller is disposed adjacent to the supply roller, and the wire is supplied while being sandwiched between the supply roller and the pressure roller. Tension control device. 6. A wire rod according to claim 1, wherein a pressure belt is disposed adjacent to said supply roller, and said wire is supplied while being sandwiched between said supply roller and said pressure belt. Tension control device. 7. A supply belt is wound around the supply roller, the supply belt is pressed against a pressure roller, and the wire is supplied while being pinched by the pressure roller and the supply belt. Item 2. A tension control device for a wire rod according to item 1.