JPH0361248A - Left and right tension compensating apparatus for long-length film - Google Patents

Abstract

PURPOSE:To prevent a long-length film from being deformed and being caught by rolls upon running, by providing a drive mechanism which receives a signal from a control device, for changing an inclination of a feed roll with respect to the widthwise direction. CONSTITUTION:If a right side tension of a long-length film 9 which is detected by a right side tension detector 10 is greater than a left side tension of the film 9 detected by a left side tension detector 10, a positive voltage is amplified and is then delivered from a control device 12 to a servo-motor 17 which is therefore normally rotated so as to slide a take-up unit 15 in the direction of the arrow (a). Due to this slide, the right side tension of the film 9 varies in a decreasing direction in accordance with a degree of inclination with respect to the widthwise direction of a variable feed roll 13, thereby the right and left tensions can be uniformly compensated.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention is directed to a long film such as a copper foil or an insulating film that is fed out from a roll and runs continuously in the manufacturing or processing process. This invention relates to a device that automatically corrects the tension difference between the left and right ends of a film.

(Conventional technology) Copper foil and insulating film, which have traditionally been the raw materials for manufacturing flexible printed circuit boards (FPC), have been rolled into wide, long films that are then processed by manufacturers according to the wishes of users. Although the film is cut to an appropriate width and supplied, there may be a difference in tension between the left and right ends of the film depending on the method of cutting.

This tension difference is particularly likely to appear when the amount of winding is large, and also occurs when the film is wound up or rewound around the roll core.

Furthermore, the tension difference may be reversed between positive and negative at the beginning and end of film unwinding.

Conventionally, as a device for controlling the running of a long film, a film meandering prevention device as shown in FIG. 3 has been used.

That is, a passage detection sensor 3 having a pair of slits 2 through which air is normally blown out is disposed on a running path through which the edge of the long film 1 passes under normal conditions.

Further, this sensor 3 is electrically connected to an air cylinder 4, and a connecting rod 5 of the air cylinder 4 is connected to one end of a roll shaft 7 of a feed roll 6.

As shown in FIGS. 4(a) and 4(b), when the film 1 deviates from its normal position to either the right or left, the balance of the air ejected from the slit 2 is lost. This is detected by sensor 3.

Then, in response to a signal from the sensor 3, the air cylinder 4 is actuated to move the connecting rod 5, whereby both ends of the roll shaft 7 advance or retreat in opposite directions along the guide rail 8, and the feed roll 6 moves the film. It is configured to be inclined in the direction opposite to the deviation with respect to the width direction of the first part.

However, in such a meandering prevention device, unless the inclination of the feed roll 6 becomes extremely large, the film 1 placed thereon will not follow and slide, so that hatching is likely to occur.

In addition, with highly flexible copper foil or insulating film, even if there is a difference in tension between the left and right ends, it will not shift in the width direction and will continue in a bent state. It was not possible to correct the difference.

In addition, in the FPC fabric manufacturing process, if there is a tension difference between the left and right sides of the copper foil or insulating film that is continuously unwound, uneven coating may occur when applying adhesive to the surface or laminating it. Wrinkles occurred, which was one of the causes of defects.

(Problems to be Solved by the Invention) As described above, the conventional meandering prevention device cannot correct the tension difference between the left and right ends of a long film such as a copper foil or an insulating film.

If there is a difference in tension between the left and right sides of the film, stable feeding, winding, conveyance, etc. cannot be performed, and defects are likely to occur during manufacturing processes such as adhesive application and lamination.

The present invention was developed to solve these problems, and is capable of detecting the tension difference between the left and right ends of a continuously running long film, and automatically correcting this, resulting in stable feeding and It is an object of the present invention to provide a tension correction device that enables winding, conveyance, etc.

[Structure of the Invention] (Means for Solving the Problems) The left and right tension correction device for a long film of the present invention is provided with a device for correcting the left and right tensions of a long film, which is arranged so as to be opposite to each other at both ends in the width direction of the long film that runs continuously in the horizontal direction. a pair of tension detectors arranged as shown in FIG. The present invention is characterized by comprising a control device that inputs a signal, performs a comparison calculation, and outputs a control signal, and a drive mechanism that manually inputs the signal from the control device to change the inclination of the feed roll in the width direction. It is said that

(Function) In the long film left and right tension correction device of the present invention,
A pair of tension detectors placed opposite each other at both widthwise ends of the running path of the long film measure and detect the tension at both left and right ends of the long film that runs continuously in the horizontal direction.

The detection results are output as signals from these tension detectors to the control device, and the control device performs comparison calculations to obtain a tension difference, which is output as a control signal.

The drive mechanism receives a signal from the control device and moves the feed roll placed at the rear of the long film travel path to change the inclination of the film in the width direction, thereby reducing the tension at both left and right ends of the film. Make equal.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the left-right tension correction device for a long film according to the present invention.

In the figure, the reference numeral 9 indicates a long film such as a copper foil or an insulating film that is unwound from a roll-shaped wrapping body and runs continuously in the horizontal direction. Detectors 10 and 11 for detecting the tension on the left side and the left side are respectively arranged.

These tension detectors 10.11 are each electrically connected to a control device 12, which will be described later.

Further, at the rear of the running path of the long film 9, a variable feed roll 13 for reversing the running direction of the film is arranged as shown below.

That is, both ends of the variable feed roll 13 are connected via bearings to a fixed support 14 and a pick-up unit 15 that is movable in the film running direction, and the pick-up unit 15 is connected to a coupling 16. is connected to a servo motor 17, which is a DC motor.

Furthermore, the servo motor 17 is electrically connected to the control device 12 and is configured to rotate forward or reverse in response to a control signal from the control device 12.

The operation of the left and right tension correction device according to the embodiment having such a structure will be described below.

That is, the long film 9 running continuously in the A direction passes through the right and left tension detectors 10.11, thereby detecting the tensions at both left and right ends, respectively. Also, at this time, the voltage of the displacement meter connected to the tension detection device 10.11 is
It is output to the control device 12.

The control device 12 controls the tension according to the process shown in the flowchart of FIG. 2, and corrects the left and right tensions of the film 9 to be equal.

In other words, by means of the four comparison circuits built into the control device 12,
The manually input voltage data from the tension detectors 10.11 are compared, and the difference is amplified and output to the servo motor 17.

The servo motor 17 rotates forward or reverse depending on whether the tension difference is positive or negative, thereby causing the pickup unit 15 to move forward or backward with respect to the film running direction. As the tick-up unit 15 moves forward or backward, the variable feed roll 13 connected at one end thereof moves so as to have an appropriate inclination with respect to the width direction of the film.

That is, when the tension (R tension) on the right side of the long film 9 detected by the right tension detector 10 is larger than the tension (L tension) on the left side detected by the left tension detector 11 (R>L). The positive voltage is amplified and the control device 1
2 to the servo motor 17.

The servo motor 17 manually applied with this positive voltage rotates in the normal direction, and slides the pick-up unit 15 in the direction (A).

Due to this movement, the degree of inclination (angle) of the variable feed roll 13 with respect to the width direction changes in a direction that weakens the R tension, and the left and right tensions are corrected equally.

On the other hand, if R<L, the amplified negative voltage is output from the control device 12 to the servo motor 17, and the servo motor 17 to which this is input rotates in the reverse direction, causing the pickup unit 15 to
Slide it in the (b) direction.

As a result, the inclination of the variable feed roll 13 changes in a direction that weakens the L tension.

If there is no difference in tension between the left and right sides of the long film, no signal is output from the control device 12, and therefore such tension correction is not performed.

In the above embodiment, the variable feed roll 13 is placed at a position where the running direction of the film 9 is completely reversed, but the present invention is not limited to this. It can also be configured to vary slightly in dimension.

[Effects of the Invention] As explained above, according to the apparatus of the present invention, the tensions at both the left and right ends of a continuously fed long film are automatically detected and corrected so that they are always equal.

Therefore, the long film is prevented from being deformed or rolled into the roll during running, and stable unwinding, conveyance, winding, etc. can be performed.

Furthermore, the processing accuracy of adhesive application, lamination, etc. can be improved, and the occurrence of defects can be reduced.

Furthermore, since the left and right tension of the film during travel is always maintained equally, local wear of the feed roll bearings at some of the travel corners can be prevented.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the horizontal film tension correction device of the present invention, FIG. 2 is a flowchart showing the control process in the device of the embodiment, and FIG. 3 is a conventional long film FIG. 4 is a top view showing the meandering prevention device, and FIG. 4 is a top view showing its operation. 9...Long film 10.11...Tension detector 12...Control device 13...Variable feed roll 15... ...
...Tick-up unit 17...
Servo motor funeral diagram Figure 2 a Mistake Mouth sword funeral diagram 4

Claims (1)

[Claims] (1) A pair of tension detectors arranged opposite to each other at both ends in the width direction on the running path of the long film that runs continuously in the horizontal direction; A feed roll arranged on a running road and having a variable inclination in the width direction; a control device that inputs signals from the pair of tension detectors, performs a comparison calculation, and outputs a control signal; A long film lateral tension correction device, comprising: a drive mechanism that inputs a signal and changes the inclination of the feed roll in the width direction.