JP2000074660A - Slack measuring method for winding roll and winding device with slack measuring instrument for winding roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To grasp a slack condition of winding quantitatively for improved precision of quality control by measuring a variation in the distance of the sheet surface which travels between supporting rolls using a distance sensor. SOLUTION: This winding device winds paper 2 (sheet) delivered from an unwinder 1 which is a delivering side winding roll by a winder 9 which is a delivered side winding roll through supporting rolls 2, 3, 4, 5, 6, 7. Winding wound by the winder 9 is loaded on a movable carriage 8 and sent to the next process. A displacement measuring sensors (distance sensors) 12, 13, 14 are mounted which measure three points of the midpoint of the paper width and almost both sides of the paper so as to measure the position of the traveling paper 2 at a roughly middle point between the roll 4 and the roll 5. The variation in the distance of the sheet surface which travels between the roll 4 and roll 5 at a constant speed is measured, and the signals form the sensors 12, 13, 14 are processed by a signal processing part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method of measuring a roll roll thickness which is useful in managing the thickness of a roll of paper or a plastic sheet, and a winding (rewind) with a roll roll thickness measuring device. Related to the device.

[0002]

2. Description of the Related Art The winding condition of a roll has been one of the items for quality assurance when the roll is shipped. But,
Conventionally, only extremely qualitative methods have been used, such as hitting the winding with a hammer or the like to hear the sound or visually observing disturbance at the end of the winding.

[0003]

DISCLOSURE OF THE INVENTION The present inventors quantitatively grasp the state of winding tarmi in comparison with such a qualitative method, and contribute to improving the quality control accuracy. It is an object of the present invention to provide a measuring method and a winding (rewinding) device with a winding tarmi measuring device.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided a method of measuring the thickness of a take-up roll, which is provided at a predetermined interval when the take-up roll is wound from a supply-side take-up roll to a supply-side take-up roll. This is a method for measuring a change in the distance of the sheet surface during the traveling of a sheet traveling at a constant speed between the pair of supporting rolls.

[0005] A take-up device with a tarmi measuring device according to the present invention comprises a supply-side take-up roll for supplying a sheet, a supply-side take-up roll for taking up a sheet supplied from the take-up roll, and a supply-side take-up roll. A pair of support rolls for supporting the sheet, which are arranged at a fixed interval in the middle of a sheet passage between the roll and the supply-side take-up roll, and a sheet surface running substantially at an intermediate portion of the pair of support rolls A distance sensor for measuring a distance of the distance sensor, and a signal processing unit for processing a signal from the distance sensor.

[0006] It is more preferable that the pair of support rolls be installed in a substantially vertical direction because they are hardly affected by gravity. It is preferable to install a plurality of distance sensors in the width direction of the sheet, because it is possible to measure the thickness in a more detailed range. Using an optical displacement sensor for the distance sensor,
It is more preferable for improving accuracy. If the installation environment is a place with a lot of dirt and dust, a sensor using ultrasonic waves, electromagnetic waves, or the like is more preferable.

It is preferable to use a recorder as the signal processing unit because it is simpler and data can be easily stored. It is preferable that the signal processing unit further includes a judging means for judging whether or not the signal exceeds an arbitrary prescribed value, so that a more automatic judgment can be made.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In order to measure the winding of the winding, the sound of the winding is digitized. Disturbance at the end of the winding is photographed by an electronic camera or the like, and image processing is performed to digitize. And other measures were considered. However, when digitizing sound, it is necessary to investigate the nature of the sound caused by tarmi before digitizing,
It was thought to be quite difficult. It is also difficult to quantify the extent of spillover at the ends because it is not uniform even when the numerical values of the edges are scattered. Thought. I noticed that during the rewinding operation, the winding of paper with a lot of thickness caused severe running of the paper. Therefore, the degree of paper shake during running was actually observed visually. As a result, they discovered that the larger the winding of the tarmi, the larger the amplitude of the blur. Therefore, we tried to use a sensor to capture the degree of the amplitude more quantitatively.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a winding device with a winding roll terminal measuring device according to the present invention. FIG. 1 is a side view of an embodiment of a winding device with a measuring device for a winding roll of the present invention. In the winding device 10, the paper 2 unwound from the unwinder 1, which is a supply-side winding roll, is wound on a winder 9, which is a supply-side winding roll, via rolls 3, 4, 5, 6, and 7. The winding wound by the winder 9 is placed on the moving table 8 and sent to the next step.

In this embodiment, the winding device was operated at a traveling speed of 200 m / min. Displacement measurement for measuring the position of the running paper at three positions, approximately at the middle point between the rolls 4 and 5, in the width direction of the paper, at the center position of the paper width and at a position 50 mm from both side edges of the paper. Sensors 12, 13, and 14 are installed. The sensor used in this example is a visible light laser displacement sensor (manufactured by Keyence Corporation: Model LB-100)
0) and the resolution was 50 μm.

In this embodiment, the distance between the rolls 4 and 5 is about 2 m. If this distance is too short, the amount of displacement will be small, making measurement difficult. On the other hand, if the length is too long, the influence of factors other than the uneven winding, for example, mechanical vibration of the paper traveling system becomes large. According to the inventors' experience,
At a general traveling speed of several hundred m / min, it is preferably about 1 m or more and less than 4 m.

The section where the displacement is measured is preferably a section where the seat travels substantially in the vertical direction because it is less susceptible to the influence of gravity and the like. Figure 2 shows displacement measurement sensors 12,13,
FIG. 14 is a block diagram of a signal system showing a processing system of a signal from FIG. After the analog output from each displacement measuring sensor is converted from analog to digital by the A / D converter 15, the arithmetic unit 16 calculates the average fluctuation range and the maximum fluctuation range, and compares them with a preset reference value. If the reference value is exceeded, the printer
From 17, judgment of failure and its data are output. If it is within the reference value, the printer 17 outputs a pass judgment and the data. The A / D converter 15 and the calculator 16 are generally configured inside a personal computer (PC) 18. In this embodiment, an example in which the output of the displacement measurement sensor is input to a personal computer for processing is shown. However, instead of the personal computer, the output is input to a recorder, and a recording waveform from the recorder is read by an operator, and passed or failed. A pass can also be determined.

In practical use, it is necessary to perform the above-described measurement on a part of a plurality of windings obtained in one lot, and to judge the whole lot from the result. Is advantageous. In this embodiment, the basis weight is 50
For a relatively wide range of paper of ~ 200 g / m ² , the running speed is 200 m / min and the tension applied during running is 0.3-
At 0.5 kg / cm, an average vibration width of + -15 mm or less could be determined as good. These numerical values are appropriately changed depending on the type of paper, running speed, measurement conditions, and the like.

In this embodiment, an example is described in which a plurality of displacement measuring sensors are arranged in the width direction. However, one displacement measuring sensor may be scanned in the width direction of the paper. In this case, it is preferable to adopt a smooth running mechanism so as not to be affected by fluctuations in displacement accompanying running. For example, there is a cylinder mechanism using hydraulic pressure, pneumatic pressure, electric force, or the like.

[0015]

According to the present invention, it is possible to quantitatively measure the thickness of a roll which has been conventionally captured only qualitatively, and to stabilize the quality of the roll to be shipped.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of a winding device having a winding roll tall measuring device according to the present invention.

FIG. 2 is a block diagram of a signal system showing a processing system of a signal from a displacement measurement sensor.

[Explanation of symbols]

 1 Unwinder 2 Paper 3-7 Roll 9 Winder 12-14 Displacement measurement sensor

Claims (7)

[Claims] 1. A running sheet that travels at a constant speed between a pair of sheet supporting support rolls arranged at a constant interval when the sheet is wound from a supply-side winding roll to a supply-side winding roll. A method for measuring the roll thickness of a take-up roll, which measures variations in the distance between surfaces. 2. A supply-side take-up roll for supplying a sheet, a supply-side take-up roll for taking up a sheet supplied from the take-up roll, and a position between the supply-side take-up roll and the supply-side take-up roll. A pair of support rolls for supporting the sheet, which are arranged at regular intervals in the middle of the sheet passage path, a distance sensor for measuring a distance of a sheet surface running substantially at an intermediate portion of the pair of support rolls, and the distance And a signal processing unit for processing a signal from the sensor. 3. The winding device according to claim 2, wherein the pair of supporting rolls are installed in a substantially vertical direction. 4. The winding device according to claim 2, wherein a plurality of the distance sensors are provided in a width direction of the sheet. 5. The winding device according to claim 2, wherein the distance sensor is an optical displacement sensor. 6. The signal processing unit is a recorder.
6. The winding device with a measuring device for the winding roll according to any one of items 5 to 5. 7. An apparatus according to claim 2, wherein said signal processing unit further comprises a judging means for judging whether or not the signal exceeds an arbitrary prescribed value. With winding device.