JPH09202533A - Tension adjusting device for wire rod - Google Patents

Abstract

It is an object of the present invention to provide a tension adjusting device for a wire, which can give a minute tension or a stable optimum tension to a wire used for winding a component. SOLUTION: A swing lever 17 having a guide roller 1 for guiding a wire 12 and urged by a tension spring 5 and swingably mounted on a rotary shaft 3, and a roller A7 for sandwiching the wire 12 on a support shaft 16 are provided. A motor 9 that rotationally drives a roller B8 and a roller A7 that press the attached lever 10 by a tension spring 11, a detection unit 6 that detects a change in the rotation shaft 3, a signal thereof, and a signal of an external tension setting signal unit 14. Is composed of a control unit 13 which performs a comparison calculation of the output control signal and feeds back the output control signal to the motor 9 to control, and it is possible to apply a stable tension to the wire 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rod tension adjusting device which is used in a winding wire of an electronic device or an electronic component formed by a winding wire and stably applies a constant tension to the wire rod.

[0002]

2. Description of the Related Art Inductors, voice coils for speakers,
In order to manufacture a winding component such as a rotor or a stator of a motor or a generator, it is necessary to wind a conductive wire in a winding device.

When winding a wire such as a copper wire in a winding device, the wire does not sag, the winding part does not collapse, and the wire is not cut.
It is necessary to always apply an appropriate tension to the wire.
In order to constantly apply this tension, there have been conventional tension adjusting devices that utilize frictional force, and that apply magnetic force.

A conventional tension adjusting device to which a frictional force is applied will be described below with reference to the drawings. FIG. 2 is a conceptual diagram showing a main part configuration of a conventional wire tension adjusting device.
Reference numeral 0 denotes a wire made of copper wire or the like, which is sent from the supply unit of the spool and wound around the brake roller 21, and then the spring 2
4 is supplied to the winding device via a guide guide roller 26 provided at the other end of a swing lever 25, one end of which is controlled to be swingably attached to a support shaft 27.

A brake lever 23 is rotatably attached by a support shaft 28 and is pressed against the brake roller 21 by a spring 22.

The position of the guide roller 26 is controlled by the action of the spring 24, and the rotation of the brake roller 21 is controlled by the spring 22 so that a constant tension is constantly applied to the wire 20.

[0007]

However, in the above-mentioned conventional wire rod tension adjusting device, since the winding device gives a resistance to pulling the wire rod 20 to generate tension, the winding is actually performed. The tension for pulling out the wire rod 20 from the spool at the nozzle portion of the winding device or the wire rod 20
It was not possible to obtain a tension smaller than the tension due to the friction of the guides for routing or regulating or guiding.

Further, when a small twist is generated in the wire rod 20 or dust is attached, the wire rod 2 is provided at the dust removing portion of the wire rod 20 provided in the tension adjusting device for the wire rod 2.
There is a problem that 0 is caught and the wire is easily broken at the portion where the wire 20 is most stressed (in most cases, the nozzle portion of the winding device).

Further, it is difficult to deal with the case where a special winding is required in which the tension of the wire 20 needs to be changed during the winding work.

Further, in the tension adjusting device for a wire rod applying the magnetic force, since the magnetic material is used in the brake roller 21,
The inertia moment becomes large, and due to the inertia moment of the brake roller 21, a higher tension than usual is generated at the start-up of the winding, which makes it difficult to shorten the winding start-up time.

On the other hand, the tension adjusting device for a wire rod which utilizes the frictional force has a problem that the frictional force changes with time due to friction and deterioration of the brake lever 23, and periodical inspection adjustment and maintenance are required. there were.

The present invention is intended to solve such a conventional problem, and an object of the present invention is to provide a tension adjusting device for a wire which can stably apply a fine or optimum tension. .

[0013]

In order to solve the above-mentioned problems, a tension adjusting device for a wire according to the present invention is a wire rod between rollers mounted in a pressure contact state so as to rotate in synchronization with a roller coupled to a motor. A swinging lever that clamps and delivers the wire rod and a guide roller that guides the delivered wire rod at one end, and the other end is coupled to a rotating shaft and is urged by a spring in a direction opposite to the pulling and feeding direction of the wire rod. The tension generator consists of a detector, the detector that detects the tension applied to the wire by the rotational angle displacement that is the rotation change of the rotary shaft of the rocking lever, and the detector signal and the target tension set value signal from the outside. The control unit controls the tension applied to the wire by feeding back an output control signal to a motor that rotates the roller by performing a comparison calculation.

According to the present invention, it is possible to stably apply a minute or optimum tension to the wire material, which has few wire breakages, the tension can be easily changed, the winding rising speed can be increased, and the maintainability is excellent. It will be possible.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is
A roller connected to the motor, and an unwinding part that holds the wire rod between the roller attached in a pressed state so as to rotate in synchronization with the roller and feeds the wire rod, and the wire rod fed out from this unwinding part. Tension generation consisting of a swing lever having a guide member which is supplied and supplied at one end and the other end of which is coupled to a rotary shaft, and a biasing member which biases the swing lever in the direction opposite to the supply direction of the wire rod. Section, a detecting section for detecting a tension applied to the wire rod supplied through the swing lever by detecting a rotational change of a rotary shaft to which the swing lever is coupled, and a signal of this detecting section for unwinding the signal. A tension controller for a wire rod, which comprises a controller for controlling the tension applied to the wire rod supplied through the swing lever by feeding back to a motor for rotating a roller of the wire rod, Having or giving a constant tension to the wood, the effect can be arbitrarily changed tension.

According to a second aspect of the present invention, in the first aspect of the invention, the guide roller or nozzle is used as the guide member, and the spring or the balance weight is used as the biasing member. It has the effect of being smooth and reducing disconnection.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing a configuration of a main part of a wire rod tension adjusting device according to the embodiment.

In FIG. 1, reference numeral 1 denotes a guide roller for guiding and supporting a wire rod 12 of a conductive wire such as a copper wire having an insulating coating, which is rotatably attached to a tip 2 of a swing lever 17. The swing lever 17 is swingably attached to the frame 15 by the rotating shaft 3 coupled to the central portion of the V-shape, and the tension spring 5 is attached to the other end 4 of the swing lever 17 and one end of the frame 15. Thus, a torque corresponding to the rotational angle displacement, which is a change of the swing lever 17, that is, the rotation shaft 3, is generated and constitutes a tension generating portion.

Reference numeral 6 is a detection portion composed of an oscillating lever 17, that is, an electrical or mechanical sensor for detecting a rotational angular displacement which is a change of the rotary shaft 3.

Reference numerals 7 and 8 are a roller A and a roller B made of an elastic material such as hard rubber or resin material.
Reference numeral 7 is connected to a motor 9 such as a driving servo motor or a pulse motor to be rotationally driven. The roller B8 is rotatably attached to one end of a lever 10, and the other end of the lever 10 is swingably attached to a frame 15 by a support shaft 16.

The vicinity of the center of the lever 10 and the frame 1
The outer peripheral portion of the roller B8 is pressed against and abuts the outer peripheral portion of the roller A7 by the tension spring 11 installed on the fixed portion 18 of the roller 5, so that the wire rod 12 contacts the roller A7 and the roller B8. The wire rod 1 is pulled from the spool by holding the outer peripheral surface in contact and drivingly rotating the motor 9.
2 can be sent out, that is, unwound, in the direction of the arrow in the figure, and constitutes the unwinding portion of the wire 12.

Reference numeral 13 denotes a control unit, which compares and calculates a target tension set value signal of the wire rod 12 from the external tension setting signal unit 14 and a rotation angle displacement signal from the detection unit 6,
Based on the deviation, the motor 9 at the unwinding portion of the wire 12 is feedback-controlled.

The operation of the tension adjusting device for a wire according to the present invention constructed as above will be described.

First, it is assumed that the wire 12 is applied with an appropriate tension as intended while the motor 9 is stopped. Next, when the wire 12 is pulled in the direction of the arrow in the figure by the operation of the winding device or the like, the tip 2 of the lever 17, that is, the rocking lever 17 is moved downward in the lower right direction of FIG. And rotates with the rotating shaft 3.

The rotational angle displacement of this change is detected by the detection unit 6 and the signal is sent to the control unit 13. And the control unit 1
3, the signal from the detection unit 6 and the external tension setting signal unit 14
Comparing and calculating the tension set value signal by, the control signal is fed back to the motor 9 so as to keep the deviation at 0, and the motor 9 is rotationally driven to rotate the roller A7 and the roller B8 in the direction of the arrow in the drawing to draw the wire rod. 12 is unwound in the direction of the arrow in the figure, and the tip 2 of the lever 17, that is, the swing lever 17 is returned to the original position, and the tension of the wire 12 is set to the target optimum value.

Next, when the wire rod 12 sags in the direction opposite to the arrow direction in the figure for some reason, the tip 2 of the lever 17, that is, the swing lever 17 has the center of the rotary shaft 3 as a fulcrum, and the upper left direction of FIG. It is rotated together with the rotating shaft 3 by the tension spring 5.

The rotational angle displacement, which is the opposite of the above change, is detected by the detection unit 6 and the signal is sent to the control unit 13. Then, the control unit 13 compares and calculates the signal from the detection unit 6 and the tension setting value signal from the external tension setting signal unit 14, and feeds back the control signal to the motor 9 so as to keep the deviation at 0, thereby driving the motor 9. The roller A is driven to rotate in the opposite direction to the above.
7 and the roller B8 are rotated in the direction opposite to the arrow in the figure to rewind the wire 12 in the direction opposite to the arrow in the figure, and the tip 2 of the lever 17, that is, the swing lever 17 is returned to its original position. The tension of the wire rod 12 is set to a desired optimum value.

Further, the changing speed or the changing amount of the pulling or slack of the wire 12 is also detected by the detecting section 6 at the same time, and the control signal from the controlling section 13 which has been compared and calculated is fed back to the rotational driving speed of the motor 9. And the amount of rotation is set and driven for optimum control.

As described above, the change in the tension of the wire 12 is detected as the rotation angle displacement which is the change in the rotary shaft 3, and the calculated value is compared with the target tension set value of the external tension setting signal section 14 to control it. The output signal is used to feedback-control the motor 9 so that the wire 12 has an optimum target tension.

Further, the unwinding portion of the wire rod 12 is constructed such that the wire rod 12 is sandwiched between the roller A7 and the roller B8 which are in pressure contact with each other, and the wire rod 12 is unwound by the rotational driving of the motor 9, so that the spool is removed from the spool. The load, such as friction or tension, generated on the wire 12 being routed between the roller A7 and the roller B8 is clamped by the wire between the unwinding portion and the winding device that performs the winding work. It does not affect the tension of 12. As a result, a very small tension, which is lower than the tension required to pull out the wire 12 from the spool, can be applied to the wire 12 in a winding device that performs a winding operation.

Further, by changing the set value of the external tension setting signal section 14, it is possible to change the signal from the detecting section 6 inputted to the control section 13, that is, the target value of the rotational angle displacement which is the change of the rotary shaft 3. Therefore, it is possible to arbitrarily change the tension applied to the wire 12 during the winding work.

In the present embodiment, the output signal of the detection unit 6 and the external tension setting signal unit 14 are input to the control unit 13.
The feedback control is performed by comparing with the set value input signal of, but the winding data from the winding device is also used as an input signal, and feed-forward control is also used to improve the accuracy of the tension adjustment value. It is possible.

A balance weight may be used instead of the tension spring 5, an air cylinder or an electromagnetic clutch may be used instead of the tension spring 11, and a nozzle may be used instead of the guide roller.

Although the wire rod 12 has been described in the present embodiment, it can be applied to a thin film tape material such as a metal material, a resin or a paper material.

[0035]

As described above, the tension adjusting device for a wire according to the present invention detects a change in the tension of the wire as a rotational angle displacement which is a change in the rotation axis of the rocking lever, and compares it with the target optimum tension set value. The output control signal is used to feedback control the motor that rotates the roller that clamps the wire and unwinds it, so that the wire breaks without being affected by the tension required to unwind the wire from the spool. It is possible to obtain an effect that a small tension, a minute tension, a stable and optimal tension is applied to the wire, and the tension can be set to an arbitrary value by an external setting signal.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a configuration of main parts of a tension adjusting device for a wire according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a main part configuration of a conventional wire rod tension adjusting device.

[Explanation of symbols]

 1 Guide Roller 2 Tip 3 Rotating Shaft 4 Other End 5 Extension Spring 6 Detecting Part 7 Roller A 8 Roller B 9 Motor 10 Lever 11 Extension Spring 12 Wire Rod 13 Control Part 14 External Tension Setting Signal Part 15 Frame 16 Spindle 17 Swing Lever 18 Fixed part

Claims (2)

[Claims] 1. An unwinding part for pinching and feeding a wire rod between a roller coupled to a motor and a roller mounted in a pressure contact state so as to rotate in synchronization with the roller, and from the unwinding part. A swing lever having a guide member for guiding and feeding the fed wire rod at one end and the other end coupled to a rotary shaft, and a biasing force for biasing the swing lever in a direction opposite to the feeding direction of the wire rod. A tension generating unit formed of a member, a detecting unit that detects a tension applied to a wire rod supplied through the swing lever by detecting a change in rotation of a rotary shaft to which the swing lever is coupled, and a detecting unit of this detecting unit. A tension adjusting device for a wire rod, comprising a control unit for controlling a tension applied to the wire rod supplied through the swing lever by feeding back a signal to a motor for rotating a roller of the unwinding unit. 2. The tension adjusting device for a wire according to claim 1, wherein a guide roller or a nozzle is used as the guide member, and a spring or a balance weight is used as the urging member.