JPH08136371A - Apparatus for measuring tension of running band-shaped body - Google Patents

Abstract

PURPOSE: To measure tensions impressed at a plurality of different positions in the widthwise direction of a band-shaped body, by generating an air film between the running band-shaped body and an arc face of a sensor bar and guiding the air pressure generated by the air film from minute holes to a pressure sensor. CONSTITUTION: A plurality of minute holes 14 are formed in the longitudinal direction of an outer arc face 12 of a semicylindrical rod-like sensor bar 11. A pressure sensor 15 is connected to a connection port 13 inside the sensor bar 11 corresponding to the minute hole 14. A pressure catch chamber 16 is formed between the minute hole 14 and a sensing part of the sensor 15. A tape base 4 such as a plastic film or the like is brought in touch with the arc face 12 with predetermined angles and transferred at a relatively high speed. As a result, an air film is generated between the arc face 12 and the base 4. The air pressure generated by the air film is guided to the pressure catch chamber 16 via the minute holes 14, and detected by the sensor 15. The tension impressed at a plurality of different positions in the widthwise direction of the running band-shaped base 4 can be thus measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension measuring device for a traveling belt which can measure the tension applied to a wide belt traveling at a high speed, especially at different positions in the width direction.

[0002]

2. Description of the Related Art A conventional tension measuring device for a belt-like body is constructed, for example, as shown in FIG. There is a device that is provided with a transformer type pressure sensor 2 and measures the tension applied to the belt-shaped body through a guide roll and a bearing.

However, with this conventional tension measuring device for a strip, it is possible to measure the tension applied to the entire strip, but it is impossible to measure the tension at a plurality of different positions in the width direction of the strip.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a tension measuring device capable of measuring the tension applied to a strip at a plurality of different positions in the width direction of a traveling strip. is there.

[0005]

In order to solve the above problems, the present invention provides an arc surface which abuts a belt running at high speed, a pressure capturing chamber, a pressure sensor provided in the pressure capturing chamber, and The sensor bar was provided with a plurality of pores connecting the arc surface and the pressure capturing chamber.

[0006]

The point of the running belt tension measuring device of the present invention is that the sensor bar is provided with a plurality of pores communicating with the pressure capturing chamber, and an air film is generated between the running belt and the arc surface. By detecting the air pressure generated by the air film through the pores with the pressure sensor provided in the pressure capturing chamber, it is possible to measure the tension applied to the strip at different positions in the width direction of the traveling strip. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the tension measuring device for a traveling belt-like body according to the present invention will be described below with reference to FIGS.

First, the construction and operation of the traveling belt tension measuring device of the present invention will be described with reference to FIGS. FIG. 1 shows an example in which the tension measuring device of the present invention is incorporated in a slitter device for cutting a wide base material of a magnetic tape into an appropriate width. Reference numeral 3 is a supply drum around which a tape base material 4 is wound.
Is a take-up drum for taking up the cut tape, and the master rollers 6a, 6b and the outfeed roller 7a for feeding the tape at a constant speed between the two drums, and for applying an appropriate tension, 7b is provided. The tension measuring device 8 of the present invention is arranged between the rollers 6 and 7. The tension measuring device 8 and the outfeed rollers 7a, 7
A cutter 9 for cutting is provided between b and guide rollers 10a and 10b are arranged on both sides of the tension measuring device 8.

On the other hand, referring to FIG. 2, the tension measuring device 8 of the present invention will be described in detail. The sensor bar 11 is a semi-cylindrical bar-shaped body having an arc surface 12 on the outside and a connection port 13 on the inside, and the arc surface 12 is the same. A plurality of pores 14 that communicate between the connection ports 13 are provided in the longitudinal direction. Further, a pressure sensor 15 is connected to the connection port 13 at the corresponding position of the pore 14 to form a pressure capturing chamber 16 between the pore 14 and the sensing portion of the pressure sensor 15. Supporting members 17 a and 17 b for mounting are provided at both ends of the sensor bar 11.

In FIG. 1, the output signal detected by the pressure sensor 15 is input to the data observer 18, converted into an appropriate signal by the converters 19a, 19b and 19c, and further, the multi-channel recorder 20 and the data analyzer 2 are connected.
It is designed to be observed and recorded after passing 1.

The present invention will be described below with reference to the principle of operation of FIG. FIG. 3 is a sectional view taken along the line YY of the tension measuring device described in FIG. 2, and the same components are designated by the same reference numerals. When the tape 4 is brought into contact with the arc surface 12 of the sensor bar 11 at a predetermined angle and conveyed at a relatively high speed V, an air film is generated between the arc surface 12 and the tape.

FIG. 6 shows the results of measuring the tension distribution in the width direction of a plastic tape having a width of about 1000 mm. The dimension in the horizontal direction indicates 11 points of the sensor position, and the dimension in the vertical direction is the detection output voltage [V] of the sensor and can be converted into tension. The data of the solid line of a, the dotted line of b, and the alternate long and short dash line of c are data obtained by plotting the results of measuring a after t seconds and after t seconds. The measured data at these three points are almost in agreement, and it can be seen that the tension at each point of the tape is well represented.

Although the present invention has been described above with reference to an embodiment, the present invention is not limited to this embodiment. For example, it can be used for measuring the tension of various plastic films for packaging, paper or metal films.

[0014]

As is apparent from the above description, according to the present invention, it is possible to provide an apparatus capable of measuring tensions at a plurality of positions in the width direction of a running strip.

As a result, by incorporating this measuring device into a slitting device for magnetic tape, a coating device for magnetic material, a calendering device, etc., tension data at a plurality of positions in the width direction of the tape is obtained, and based on the result, abnormalities are detected. When the tension distribution is large, adjusting the tape tension has the effect of making the tension distribution uniform, improving the processing conditions in the process, and eventually improving the quality of the processed strip. .

[Brief description of drawings]

FIG. 1 is a schematic view of a tension measuring device for a running belt according to the present invention, which is applied to a base material slitting device for a magnetic tape.

FIG. 2 is a perspective view in which a part of the running belt-shaped measuring device of the present invention is cut away.

FIG. 3 is a cross-sectional view taken along line YY in FIG. 2 of the traveling belt-shaped body measuring apparatus of the present invention.

FIG. 4 is a perspective view showing an example of a tension measuring device for a running belt according to the present invention.

FIG. 5 is a graph showing the results of measuring the tension distribution in the width direction using the tension measuring device for a running belt of the present invention.

[Explanation of symbols]

 1 Guide Roll 2 Pressure Sensor 3 Supply Drum 4 Base Material 5 Winding Drum 6a, 6b Master Drum 7a, 7b Outfeed Roller 8 Tension Measuring Device 9 Cutting Cutter 10a, 10b Guide Roller 11 Sensor Bar 12 Sensor Bar Arc Surface 13 Connection port 14 Pore 15 Pressure sensor 16 Pressure trap chamber 17a, 17b Support member 18 Data observer 19a, 19b, 19c Transducer 20 Multi-channel recorder 21 Data analyzer

Claims (5)

[Claims] 1. A circular arc surface against which a running belt-shaped body abuts,
A tension measuring device for a running belt, comprising: a pressure capturing chamber; a pressure sensor connected to the pressure capturing chamber; and a fine hole communicating the arc surface with the pressure capturing chamber. 2. The tension measuring device for a traveling belt-like body according to claim 1, wherein a plurality of pores, a pressure capturing chamber and a pressure sensor are provided at predetermined intervals. 3. The tension measuring device for a traveling belt-like body according to claim 1, wherein the belt-like body is caused to travel at a speed at which an air film is generated between an arcuate surface that abuts the traveling belt-like body. 4. A circular arc surface against which a running belt-shaped body abuts,
2. The traveling according to claim 1, wherein the pressure trap chamber, the pressure sensor connected to the pressure trap chamber, and the pores communicating with the arc surface and the pressure trap chamber are provided in the kamaboko-shaped sensor bar. A belt tension measuring device. 5. The belt-shaped body is a plastic film, paper,
The tension measuring device for a traveling belt-like body according to any one of claims 1 to 4, which is a metal foil.