JPS5926569B2 - Automatic contact pressure adjustment device for rolled material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding pressure adjusting device for a device that winds a wide and long sheet material such as a polymer film, paper, or fabric on a winding holder.

More specifically, in a device that cuts and winds a sheet-like material to a desired width using a surface-driven slitter or a slitter that combines surface-drive and center-drive, the contact pressure between the sheet-like material being wound and the presser roll is intermittently applied. The present invention relates to an automatic contact pressure adjustment device for a wound material that measures and continuously controls the contact pressure to a desired programmed contact pressure. When a long sheet is slit and wound, its quality depends on the alignment of the cut edges,
It is evaluated based on the winding hardness of the rolled product, wrinkles in the inner layer of the rolled product, disturbance of the end surface of the rolled product, etc.

All of these evaluation items are based on the distribution of the contact pressure in the width direction during winding between the material to be wound and the presser roll in the surface-driven slitter and the surface-driven and center-driven slitter, and the force applied to the gradually wound sheet material. The analysis conducted by the present inventors revealed that it is affected by the engagement.

However, in conventional slitters, the method of directly measuring and controlling the contact pressure has not been put to practical use due to its technical difficulties.

Therefore, in the past, the contact pressure was set indirectly by a skilled operator relying on intuition gained through years of experience.

FIG. 1 is a perspective view of the main parts of a conventional surface drive and center drive slitter.

The presser roll 1 has a double structure in which a metal roll 2 is coated with an elastic body 3, and a shaft 4 is connected to brackets 5, 5'.
It is rotatably supported by a motor and driven by a motor (not shown).

On the other hand, a shaft 7 supporting the winding core of the winding material 6 (6a, 6b) is supported by arms 8, 8' and driven by a motor 9. A core parallelism correction screw 10 is attached to the tip of the arm 8, and the arms 8 and 8' are attached to air cylinders 11 and 1.
It is supported so that it can be lifted up and down freely. The material to be wound 6 is pressed against the presser roll 1 by one air cylinder 11, and this contact pressure is determined by the pressure of compressed air supplied to this one air cylinder 11. The opening degree of the valve 12 is continuously adjusted by the operator. In the conventional winding device, the operator must constantly adjust the opening degree of the valve 12, and the operator who makes this adjustment is required to have a high level of intuition. One side screw 1
0 adjustment is normally performed only at the start of winding and not during the winding operation, so even if the parallelism between the winding core and the presser roll 1 deviates during the winding operation, this adjustment will not occur. Corrections are rarely made. As a result, the quality of the rolled sheet material varies considerably. The purpose of the present invention is to automate the setting of the contact pressure between the material to be wound and the presser roll, which had to be done by intuition in conventional devices. This method directly measures the contact pressure, compares the measured value with a preset target value, and automatically controls the contact pressure to reach the target value.

In order to achieve the above object, the present invention provides an apparatus in which a plurality of piezoelectric transducers are embedded in the lower surface of the elastic material coating of a presser roll, and a signal obtained from the transducer elements is extracted from the rotating presser roll. The present invention is characterized by an automatic contact pressure adjustment device for a rolled material, which is comprised of a device that automatically adjusts contact pressure.

Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited thereto, and details may be changed within the scope of the technical idea. FIG. 2 is a partially cutaway perspective view of the presser roll applied to the present invention.

The presser roll 1a is a metal roll 2 coated with an elastic body 3.

A piezoelectric element 13 is installed in this elastic body, preferably between the elastic body and a metal roll. A rotating part 14 for taking out a signal is provided at one end of the shaft 4 of the presser roll 1a. The rotating portion 14 is constructed by alternately arranging conductor portions 15 and insulating portions 16, and the conductor portion 15 and the piezoelectric element 13 are connected by a conductive wire 17. Therefore, when the rolled material 6 comes into contact with the surface of the presser roll 1a, this contact pressure is sensed by the piezoelectric element 13, and the signal is transmitted to the conductor section 15 of the rotating section 14. . FIG. 3 is a perspective view of a winding device equipped with the presser roll 1a having the structure described above, in which electric brushes 18, 18' are in sliding contact around the rotating portion 14 for signal extraction.

19 is a signal processor, one of the outputs of which is supplied to a parallelism correction motor 20 that can rotate in forward and reverse directions, and the other output is supplied to an electro-pneumatic converter 21 that converts electrical signals into pneumatic pressure. The compressed air supplied to the air cylinders 11, 11' passes through this.

An example of the relative position of the piezoelectric element 13 provided on the presser roll 1a and the rotating part 14 of the signal take-out device is as shown in FIG.
, 6b) are in frames A, b, and c shown by broken lines, and two or more piezoelectric elements 13 are always arranged in the width direction within the broken lines.

That is, the structure is such that the contact pressure of the rolled material 6 is measured at two or more points. Next, the operation of the device will be explained.

The roll 6 is placed on the presser roll 1a by air cylinders 11, 11.
An electric signal proportional to the contact pressure obtained from the piezoelectric transducer 13 by pressing and rotating the element 13 is transmitted through the conductor 17, the conductor 15 of the rotating part 14 of the signal extraction device, and the electric brush 18 or 1 of the signal extraction device. The signal is processed by the signal processor 19, and the compressed air supplied to the air cylinders 11 and 1V is controlled by the converter 21 so as to have a predetermined contact pressure.

FIG. 5 is a diagram showing an example of an electric signal obtained from the signal take-out device. If the signal train shown in section C in FIG. At this time, the parallelism of the wound material 6 is corrected through the swinging mechanism attached to the tip of the arm 8 by driving the parallelism correction motor 20 which can be rotated forward and backward.

The shaft 7 supporting the winding core of the winding material and the arm 8 are supported in a swingable manner, and the degree of swinging can be adjusted by driving the parallelism correction motor 20. In the end, the parallelism of the wound material 6 to the presser roller 1a can be adjusted. In the case of parts A and B in Fig. 5, there is no need to correct the parallelism, and the air supply pressure of the air cylinders 11 and 11' is signaled via the converter 21 so that the peak value of the entire signal train becomes the set value. It is controlled by a signal from the processor 19.

That is, according to the device of the present invention, if there is a difference in the electrical signals obtained from the plurality of piezoelectric elements 13 that sense the contact pressure of the rolled material 6 against the presser roll 1a, or if the overall control value is If a deviation occurs, the air cylinder 1111' and the parallel layer correction motor 20 are activated by the signal processor 19 and the electric signal-pneumatic pressure converter 21.
is controlled.

As a result, the parallelism of the winding core and the pressing force of the roll 6 against the presser roll 1a are automatically controlled to predetermined values. According to the present invention, the distribution of contact pressure in the width direction and the history of changes in contact pressure are automatically controlled to predetermined values, making it possible to manufacture a roll of extremely high quality. can.

Furthermore, according to the present invention, there is no need for specially trained operators to adjust the contact pressure during winding, so even beginners can produce high-quality wound products.

Example: Nine piezo lighters RPO7K manufactured by Murata Manufacturing Co., Ltd. were attached to the presser roll of a slitter (FK type) with surface drive and center drive with a roll surface length of 2300 mm manufactured by Nishimura Manufacturing Co., Ltd., and a direct current with a diameter of 100 mm was used as a signal extraction device. A motor commutator and electric brush were used.

The signal processor is a minicomputer HITAC- manufactured by Hitachi, Ltd.
101 and a homemade interface, and a PK electro-pneumatic converter model 5502 manufactured by Yokogawa Electric Corporation was used as an electro-pneumatic converter. In this embodiment, almost any contact pressure can be measured, and the minicomputer program can also be used to control any contact pressure, such as gradual increase or decrease, and to adjust the contact pressure against the presser roll of the roll in the width direction of the roll. It was now possible to control the process to a nearly constant level, and a significant improvement in the level of edge alignment was observed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of a conventional slitter with surface drive and center 1 drive, FIG. 2 is a partially cutaway perspective view of a presser roll that constitutes the main part of the present invention, and FIG. FIG. 4 is a perspective view of the main parts of such a slitter, FIG. 4 is a developed view showing the positional relationship between the piezoelectric transducer incorporated in the presser roll and the signal extraction device, and FIG. 5 is an example of an electric signal obtained from the signal extraction device. FIG. 1a... Presser roll, 2... Metal roll, 3... Elastic body, 4... Shaft, 1
3...Piezoelectric element, 14...Rotating part for signal extraction, 15...Conductor part, 16...
Insulator, 17... Conductor, 18, 18t...
・Electric brush, 19...Signal processor, 21...
... Parallelism correction motor, 21 ... Electro-pneumatic converter.

Claims (1)

[Claims] 1. A presser roll that covers an elastic body and has a piezoelectric element located at a position to sense the pressure of the elastic body and contacts the wound material;
a device for extracting the signal obtained from the piezoelectric element to the outside; a device for adjusting the parallelism of the rolled material based on the signal; and a device for adjusting the force for pressing the rolled material against the presser roll;
1. An automatic contact pressure adjustment device for a wound material, comprising a device for controlling these adjustment devices.