JPH07257797A - Method for controlling winding tension of belt-like material, and winding device of belt-like material using it - Google Patents

Abstract

PURPOSE:To perform a stable winding even when the winding torque is fluctuated by providing a winding tension measuring instrument near the winding part, and controlling the winding speed according to the fluctuation of the tension measured value. CONSTITUTION:A winding part 10 is rotated by a winding servo motor 4 to wind a band material 20. The speed v1 of the band material 20 is measured by a rotary encoder 11. The measured value is inputted to a delivering speed controller part 3, and a delivering servo motor 8 is controlled to make the speed v2 of the band material 20 on the delivering material 9 side equal to the speed v1. The winding tension is held at a fixed value by suspending a dancer roll 6 by a tensile spring 7. When the load torque is fluctuated, the tension of a part A is measured by a tension measuring instrument 2, and the speed v2 on the delivering material 9 side is controlled so as to be the speed v1<the speed v2 when the tension measured value is higher than a target value, and the speed V1>the speed v2 when lower than the target value, and the tension in a part B by the dancer roller 6 is regulated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a winding tension of a strip-shaped material in a winding-up device such as a condenser winding-up device which requires frequent acceleration and deceleration, and a strip-shaped material winding device using the same. Is.

[0002]

2. Description of the Related Art In recent years, with regard to the winding process in the production of capacitors and the like, the speed of the winding device has been increasing, and with such speeding up, the winding speed of the strip-shaped material has been increased and the acceleration / deceleration has been accelerated rapidly. There is a demand for a winding device capable of accurately controlling the tension in the coil.

A conventional band-shaped material winding device of this type will be described below with reference to FIGS. 3 and 4.

In FIG. 3, the winding unit 19 is operated by a winding servomotor 18 with acceleration and deceleration.
At this time, when the dancer roll 12 constrained by the tension spring 13 and applying the tension to the band-shaped material 20 at the portion B is displaced, the displacement sensor 11 detects the displacement and the unwinding speed controller 14 converts it into a speed command. The unwinding material 16 is rotatably unwound by the unwinding servomotor 15 and the dancer roll 12 is controlled so as to always stay at a fixed position. At this time, as long as the dancer roll 12 is in a fixed position, the tension at the portion B is kept constant as shown in FIG. 4 (b).

[0005]

However, in the above-mentioned conventional structure, a plurality of rollers 17 are required between the dancer roll 12 and the winding portion 19 to form a winding device, and the winding portion 19 is used as a servo. When the motor 18 performs acceleration / deceleration operation, even if the tension of the portion B is kept constant due to the influence of the inertia of the roller 17 and the load torque, the tension of the portion A increases during acceleration and the tension increases during deceleration as shown in FIG. 4A. The tension decreased and the tension increased as the speed increased at a constant speed, resulting in fluctuations in the winding tension.

Due to this fluctuation of the winding tension, problems such as uneven winding hardness of the winding element, elongation of the strip-shaped material in the winding element, and, in some cases, tearing of the strip-shaped material during winding, may occur. There was a problem that it occurred.

The present invention solves the above-mentioned conventional problems, and a method for controlling the winding tension of a strip-shaped material capable of controlling tension fluctuations in the winding portion and realizing high-quality and stable winding. Another object of the present invention is to provide a belt-shaped material winding device using the same.

[0008]

In order to solve this problem, a method of controlling the winding tension of a strip-shaped material according to the present invention is applied when a strip-shaped material wound around an unwinding portion is wound around an element by the winding portion. , A winding speed detector in the running path of the strip-shaped material, a winding tension measuring device in the vicinity of the winding portion, and a tension set value can be set between the unwinding portion and the winding speed detector according to its displacement. A tension adjuster and a control circuit capable of controlling the unwinding speed according to the tension measurement value and the winding speed measurement value, respectively, are provided, with respect to the winding speed according to the fluctuation of the tension measurement value. This is a method for controlling the winding tension to a target value by arbitrarily changing the unwinding speed.

[0009]

With this configuration, the tension measurement value can be changed by arbitrarily changing the unwinding speed in the unwinding speed control circuit in accordance with the fluctuation of the tension measurement value near the winding section and the measurement value of the winding speed. It becomes possible to control the take-up tension at the take-up part to a target value by changing it to make the take-up element of the take-up device for taking up the take-up member uniform and to stretch the take-up member within the take-up device. Further, it is possible to prevent tearing of the strip-shaped material during winding and realize stable winding with high quality.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a conceptual diagram showing the structure of a strip-shaped material winding device in the same embodiment. In FIG. 1, 10 is a winding portion, and 5 is a winding servo motor. The taking is done. Reference numeral 2 is a strain gauge type tension measuring device, 1 is a rotary encoder for detecting a winding speed, and 4 is a roller of a belt-shaped material traveling system. Further, 6 is a dancer roll, and 7 is a tension spring that restrains the dancer roll 6, and by these, tension is applied to the belt-shaped material 20 at the B portion and the dancer roll 6 is displaced, so that the tension at the B portion is set. The value changes.

Reference numeral 9 is a unwinding material, 8 is a unwinding servo motor, 3 is a unwinding speed control section, and an arbitrary signal is inputted to the tension measuring device 2 and the rotary encoder 1 for inputting electric signals of tension and winding speed. A speed command is given to the unwinding servo motor 8 to control the rotation of the unwinding material 9.

The operation of the belt-shaped material winding device of the present invention thus constructed will be described below.

First, when the winding portion 10 is wound by the winding servomotor 5 with acceleration / deceleration, the speed v1 of the winding material 20 on the winding side is measured by the rotary encoder 1 of the material traveling system, and the material is unwound. When the speed control unit 3 controls the speed v2 of the belt-shaped material 20 on the unwinding material 9 side to be equal to v1 via the unwinding servomotor 8, the position of the dancer roll 6 is kept constant, and the set tension of the B portion is set. Is also kept constant.

However, at this time, the tension of the portion A is 20
The fluctuation is caused by the inertia of the plurality of rollers 4 of the traveling system and the load torque.

Therefore, the tension measuring device 2 provided immediately before the winding section 10 measures the tension of the portion A and inputs the information to the unwinding speed control section 3 so that the measured tension value is higher than the target value. If it is also high, v1 <v depending on the value
When the measured tension value is lower than the target value so as to be 2, the speed v2 of the unwinding material 9 side is controlled so that v1> v2 is appropriately set according to the measured value. Each of them is lowered or raised, and as shown in FIG. 2B, the tension set value at the portion B is reduced or increased.

By constructing such a feedback loop, the tension at the portion A can be effectively kept constant as shown in FIG. 2 (a). In practice, since the roller 4 is accelerated by the belt-shaped material 20 while the winding unit 10 is accelerating, the tension value at the portion A becomes higher than the set value at the portion B, and during the deceleration, the forward movement of the roller 4 is reduced. Since the reaction force of the restraining force acts on the belt-shaped material 20, the tension at the portion A tends to be lower than the set value at the portion B, so the tension at the portion B is decreased during acceleration.
During deceleration, the unwinding speed is controlled so as to increase the tension of the B part.

In this way, it is possible to keep the tension of the portion A constant, but when it is necessary to prevent the winding element from being tightened, it is possible to increase the winding diameter of the winding element. Accordingly, it is possible to reduce the tension of the portion A and provide a function of freely setting the target tension with respect to the winding diameter in the unwinding speed control portion 3 so that the winding is performed with a constant torque.

[0019]

As described above, the method for controlling the winding tension of the strip-shaped material according to the present invention is such that when the strip-shaped material wound around the unwinding portion is wound around the element by the winding-up portion, the traveling path of the strip-shaped material. The take-up speed detector, the take-up tension measuring device near the take-up unit, the tension adjuster whose tension set value is variable between the take-up unit and the take-up speed detector according to its displacement, and the above-mentioned tension measuring device. A control circuit capable of controlling the unwinding speed according to the measured value and the winding speed measurement value is provided, and the unwinding speed is arbitrarily changed with respect to the winding speed according to the fluctuation of the tension measurement value. By operating the tension adjuster to change the tension setting value and controlling the winding tension to the target value, the winding hardness of the winding element is made uniform and Growth of
It is possible to prevent tearing of the strip-shaped material during winding and realize stable winding with high quality.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing the configuration of a belt-shaped material winding device according to an embodiment of the present invention.

FIG. 2 (a) is a characteristic diagram showing the relationship between the winding speed and the tension fluctuation in the A portion of FIG. 1; and (b) is a characteristic diagram showing the relationship between the winding speed and the tension set value in the B portion.

FIG. 3 is a conceptual diagram showing the configuration of a conventional strip-shaped material winding device.

FIG. 4 (a) is a characteristic diagram showing the relationship between the winding speed and tension fluctuation in the A portion of FIG. 3;

[Explanation of symbols]

 1 Rotary encoder 2 Tension measuring device 3 Unwinding speed control part 4 Roller 5 Winding servo motor 6 Dancer roll 7 Tension spring 8 Unwinding servo motor 9 Unwinding material 10 Winding part 20 Strip material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Uemura 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. When winding a strip-shaped material wound around an unwinding portion onto an element at a winding-up portion, a winding-up speed detector is provided in a traveling path of the strip-shaped material, and a winding-up tension near the winding-up portion. A tension controller between the unwinding part and the take-up speed detector whose tension setting value is variable according to the displacement, and controls the unwinding speed according to the above tension measurement value and take-up speed measurement value. Each of the control circuits is capable of controlling the tension set value by operating the tension adjuster so as to arbitrarily change the unwinding speed with respect to the winding speed according to the fluctuation of the tension measurement value. A method for controlling the winding tension of a strip-shaped material, in which the winding tension is controlled to a target value. 2. An unwinding part for unwinding a wound strip-shaped material, a transporting part for transporting the strip-shaped material sent out from this unwinding part, and a winding for winding up the strip-shaped material provided at the end of this transporting part. A take-up unit, a take-up speed detector provided in the middle of the path of the carrying unit for detecting the take-up speed of the strip-shaped material, and provided between the take-up speed detector and the unwinding unit and carried. A tension applying section that applies tension to the belt-shaped material, a tension measuring device that is provided in the vicinity of the winding section and measures the tension of the belt-shaped material, and the winding speed detector detects the tension according to a signal from the tension measuring apparatus. A winding device for a strip-shaped material, which comprises an unwinding speed control unit for controlling the unwinding speed of the unwinding unit according to the taken up winding speed.