JPH08128821A - Method and instrument for measuring gap - Google Patents

Abstract

PURPOSE: To measure the gap between objects which are installed in a narrow place by a method wherein a pressure-measuring element whose electric resistance is changed by a pressure is sandwiched between elastic bodies so as to form a pressure-measuring sheet and the gap is measured by the relationship between an output signal which has been stored in advance and the gap on the basis of the output signal of the pressure-measuring element. CONSTITUTION: First, the thickness of a gap-measuring instrument A is changed, and the relationship between the thickness and the output signal of a pressure- measuring element 2 is found so as to be stored in a display device 5 in advance. The pressure-measuring sheet A is constituted of the sheetlike pressure- measuring element 2 and of sheetlike elastic bodies 1 stuck to both faces of the element. The pressure-measuring sheet A is stuck to the surface of a mandrel 2 for a take-up machine, and a unit roll 4 is moved to the side of the mandrel 3. Then, the gap-measuring instrument A is sandwiched between the mandrel 3 and the unit roll 4. As a result, a pressure is exerted on the element 2 via the elastic bodies 1, and an electric signal which corresponds to the pressure is output to the display device 5 from the element 2. Thereby displaying the gap between the objects on the display device 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gap measuring method and a gap measuring device, and in particular, can easily and accurately measure a gap between objects to be measured installed in a narrow place, regardless of the gap size. The present invention relates to a gap measuring method and a gap measuring device.

[0002]

2. Description of the Related Art For example, a winder (coiler) for winding a rolled strip into a coil in a hot rolling mill is called a mandrel 3 as shown in FIG.
The strip 7 includes a rotating shaft around which the strip 7 is wound, and a plurality of unit rolls (wrapper rolls) 4 that are arranged around the mandrel 3 in parallel with the mandrel 3 with a predetermined gap. The unit roll 4 guides the tip of the rolled strip 7 around the mandrel 3 and presses the strip 7 against the mandrel 3 by a cylinder mechanism or the like to generate a frictional force between the strip 7 and the mandrel 3, This has the effect of ensuring that the strip 7 is wound onto the mandrel 3.

In such a winding machine, the mandrel 3
Maintaining the gap size and the parallelism between the unit roll 4 and the unit roll 4 with high accuracy is extremely important in preventing the occurrence of defective winding shape coils.

Since the mandrel 3 and the unit roll 4 in the above-mentioned winding machine are arranged in a narrow space, the gap between the mandrel 3 and the unit roll 4 must be measured in relation to the installation space. In place of the direct measurement method, which is difficult to measure, the following measurement methods have been conventionally adopted. A vortex sensor is attached to the chock of the winder to indirectly measure the gap. The gap is measured directly by a capacitive sensor. The gap is measured optically by irradiating the roll with a laser beam.

[0005]

However, the above-mentioned conventional method has the following problems. The method has a limit in the measurable gap size. In this method, there is a limit to the measurable gap size, and moreover, a measurement error occurs due to water or oil. This method does not take up a lot of space for installing the sensor.

Therefore, an object of the present invention is to provide a gap measuring method and a gap measuring device which can easily and accurately measure the gap between the objects to be measured installed in a narrow place, regardless of the gap size. Especially.

[0007]

SUMMARY OF THE INVENTION The present invention is based on a pressure measuring sheet composed of a pressure measuring element and sheet-like elastic members bonded to both sides of the pressure measuring element, and an output signal from the pressure measuring element. The pressure measuring sheet comprises a display for displaying the gap between the objects to be measured, and the display has a thickness of the pressure measuring sheet which changes depending on the pressure applied to the elastic body, It is characterized in that the relationship with the output signal from the pressure measuring element at this time is stored in advance.

Another aspect of the present invention is to measure the pressure based on a pressure measuring sheet including a pressure measuring element and sheet-like elastic bodies bonded to both sides of the pressure measuring element, and an output signal from the pressure measuring element. When measuring the gap between the objects to be measured by a gap measuring device comprising a display for displaying the gap between the objects to be measured with the sheet sandwiched between them, the thickness of the elastic body according to the size of the gap. It is characterized in that the pressure is adjusted by a pressure measuring element and an elastic sheet bonded to both surfaces of the pressure measuring element.

[0009]

[Function] When a pressure measuring element whose electric resistance changes according to pressure is sandwiched between elastic bodies and pressure is applied to the pressure measuring element via the elastic body, the pressure measuring element and the elastic body change according to pressure. The thickness of the pressure measurement sheet made of has a predetermined relationship with the output signal from the pressure measurement element. Therefore, if the relationship between the thickness of the pressure measuring sheet and the output signal from the pressure measuring element is stored in the display in advance, the pressure measuring sheet is sandwiched by measuring the output signal from the pressure measuring element. The gap between the DUTs can be accurately displayed on the display. In addition, if the thickness of the elastic body is adjusted according to the gap dimension between the objects to be measured, the gap measurement can be performed regardless of the gap dimension.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the gap measuring device of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic perspective view showing an embodiment of a pressure measuring sheet in the gap measuring device of the present invention, and FIG.
FIG. 3 is a schematic perspective view when the gap between the mandrel and the unit roll is measured by the gap measuring instrument of the present invention, and FIG. It is explanatory drawing which shows how to obtain | require the relationship between the output signal from a pressure measuring element and.

As shown in FIG. 1, the pressure measuring sheet A in the gap measuring device of the present invention comprises a plate-shaped pressure measuring element 2
And sheet-like elastic body 1 made of synthetic rubber such as silicone rubber having a uniform thickness, which is attached to both sides of the pressure measuring element 2 and the pressure measuring element 2.
It consists of and. The pressure measuring element 2 is made of, for example, a mixture of conductive particles such as graphite particles or spherical carbon particles in a non-conductive elastomer such as a synthetic rubber such as silicone rubber or a thermoplastic elastomer. It has the property of changing its electric resistance according to pressure.

As shown in FIG. 2, the pressure measuring sheet A of the gap measuring device of the present invention having the above structure is attached to the surface of the mandrel 3 of the winder, and the unit roll 4 is attached to the mandrel 3 side. When moved, the gap measuring device A is sandwiched between the mandrel 3 and the unit roll 4, and as a result, a constant pressure is applied to the pressure measuring element 2 through the elastic body 1, and the pressure measuring element 2 An electric signal according to the magnitude of the pressure is output to the display unit 5.

With the pressure measuring element 2 alone, when an excessive pressure is applied to the pressure measuring element 2, the pressure measuring element 2 is damaged and measurement becomes impossible. However, the pressure measuring element 2 should be sandwiched by the elastic body 1. As a result of the buffering of the pressure by the pressure measuring element 2, it is possible to withstand a larger pressure than in the case where only the pressure measuring element 2 is used. The display 5 has both a function as a power source of the pressure measuring element 2 and a function of displaying a gap calibrated as described later according to an output signal from the pressure measuring element 2.

Thickness of gap measuring device A and pressure measuring element 2
There is a predetermined relationship with the output signal from the. That is,
When pressure is applied to the gap measuring instrument A to change the thickness of the gap measuring instrument A, there is a region where the output signal from the pressure measuring element 2 changes linearly in proportion to the thickness of the gap measuring instrument A. . Therefore, the gap measuring device A in this area
The relationship between the thickness and the output signal from the pressure measuring element 2 is obtained in advance as shown in FIG. That is, the gap measuring device A is sandwiched by the micrometer 6 or a press capable of precisely setting the gap, and the micrometer 6 is rotated to deform the elastic body 1, thereby changing the thickness of the gap measuring device A. The relationship between the thickness and the output signal from the pressure measuring element 2 is obtained. Then, this relationship is stored in the display unit 5 in advance. With this, by measuring the output signal from the pressure measuring element 2, it becomes possible to accurately display the gap between the mandrel 3 and the unit roll 4 on the display 5.

It is necessary to adjust the thickness of the gap measuring device A according to the size of the gap between the mandrel 3 and the unit roll 4 so that an appropriate pressure is applied to the gap measuring device A. This can be easily performed by adjusting the number of superposed elastic elastic bodies 1. In this case, it goes without saying that it is necessary to obtain the relationship between the thickness of the gap measuring device A and the output from the pressure measuring element 2 according to the number of the elastic bodies 1 stacked.

In the above embodiment, the gap between the mandrel 3 and the unit roll 4 is measured at points, but the gap between the mandrel 3 and the unit roll 4 is measured in the axial direction. To do this, do the following:

A pressure measuring sheet B composed of a plurality of the gap measuring devices A of the above-mentioned embodiment arranged in a line is used. As shown in FIG. 4, the pressure measuring sheet B is used as shown in FIG. It should be sandwiched between and.
In order to measure the gap between the plurality of unit rolls 4 and the mandrel 3 at the same time, the gap measuring devices A are arranged in a plurality of rows, and the wide pressure measurement sheet is sandwiched between the mandrel 3 and the plurality of unit rolls 4. Just put it in.

[0019]

As described above, according to the present invention, the following useful effects are brought about. By changing the thickness of the sheet-like elastic body, the gap size can be dealt with, and therefore the gap measurement can be performed regardless of the gap size. There is no measurement error due to water or oil. Since it is only necessary to sandwich the pressure measurement sheet in the gap, it is possible to easily measure the gap between the objects to be measured installed in a narrow space.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a pressure measuring sheet in a gap measuring device of the present invention.

FIG. 2 is a schematic perspective view in the case of measuring a gap between a mandrel and a unit roll by the gap measuring device of the present invention.

FIG. 3 is an explanatory diagram showing a method of obtaining a relationship between a thickness of a pressure measurement sheet and an output signal from the pressure measurement element, which is stored in a display device in the gap measurement device of the present invention in advance.

FIG. 4 is a schematic perspective view of a case where a gap between a mandrel and a unit roll is measured by another pressure measuring sheet according to the present invention.

FIG. 5 is a schematic front view showing a winder.

[Explanation of symbols]

 1: Elastic body, 2: Pressure measuring element, 3: Mandrel, 4: Unit roll, 5: Indicator, 6: Micrometer, 7: Strip.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideki Sato, 1-2, Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Katsue Mori, 1-2, Marunouchi, Chiyoda-ku, Tokyo Date Inside the Steel Tube Co., Ltd. (72) Inventor Teruo Okamoto 3-7-3 Edobori, Nishi-ku, Osaka City, Osaka Prefecture Inaba Rubber Co., Ltd.

Claims (2)

[Claims] 1. A pressure measurement sheet comprising a pressure measurement element and sheet-like elastic bodies bonded to both surfaces of the pressure measurement element, and the pressure measurement sheet is sandwiched based on an output signal from the pressure measurement element. And a display for displaying the gap between the measured objects, wherein the display has a thickness of the pressure measurement sheet that changes depending on the pressure applied to the elastic body, and the pressure measurement element at this time. The gap measuring device is characterized in that the relationship with the output signal of the. 2. A pressure measuring sheet comprising a pressure measuring element and sheet-like elastic bodies bonded to both surfaces of the pressure measuring element, and the pressure measuring sheet is sandwiched based on an output signal from the pressure measuring element. When measuring the gap between the DUTs by a gap measuring device comprising a display for displaying the gap between the DUTs,
A gap measuring method comprising adjusting a thickness of the elastic body according to a size of the gap.