JPH0599771A - Tension measuring system - Google Patents

Abstract

PURPOSE:To enable a measurement range to be improved in a tension-measuring system with a roller for measuring tension and a pair of rollers which are needed for applying tension. CONSTITUTION:In a configuration where the shaft of a tension roller 1 is received by a bearing block 2, a tension sensor 3 is installed at a lower part of the bearing block 2, and then idler rollers 4 and 5 are placed on both sides, either one or both positions of the idler rollers 4 and 5 can be varied, thus enabling the lap angle to be varied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for measuring the tension of a thin plate material.

[0002]

2. Description of the Related Art Thin plate metal materials such as aluminum and copper and synthetic resin film materials such as vinyl chloride and PET
In the production process (hereinafter, the former and the latter are collectively referred to as sheet material), there is a step of monitoring the tension of the sheet material and winding the sheet material while keeping it constant. As an example of a method for detecting the tension of the sheet material, a sheet material is applied with tension to a roller (hereinafter referred to as a tension roller) attached to a detection portion of a tension detection sensor (hereinafter referred to as a tension sensor). There is a method in which the tension sensor detects the resultant force of the tension applied to the tension roller in a configuration in which the tension roller is wound around a pair of rollers (hereinafter referred to as idler rollers) necessary for the above. FIG. 1 is an example of a hardware configuration of the tension measuring system. A bearing block 2 receives the shaft of the tension roller 1, and a tension sensor 3 is installed below the bearing block 2. As shown in FIG. 1, when the tension applied to the sheet material 6 through the idler rollers 4 and 5 is T1 and T2,
The tension values of T1 and T2 are detected by the tension sensor 3 as the resultant force F, and the actual tension values after the arithmetic processing, that is, T1 and T2, are detected by the controller having the data processing function.
Printed as a value of 2. The resultant force F in FIG. 2 is F = 2T1 cos2θ = 2T2 cos2θ (1), where the angle formed by T1 and T2, that is, the wrap angle is 2θ. Therefore, the tension value T directly applied to the sheet material (hereinafter referred to as the tension value T) is T = F / 2cos2θ. However, T = T1 = T2, 0 <θ <90 °.

[0003]

Conventionally, when this method is used, the measurement conditions are kept constant, that is, the idler rollers 4, 5 are used.
Fix. The designer applies the tensions T1 and T2 applied to the sheet material 6 and the wrap angle 2θ, that is, the idler roller 4,
The tension measurement system is determined by considering the arrangement of 5 and determining the tension measurement system. However, this means that the tension measurement system is limited due to the performance of the system. If the need arises, the system may not be able to measure it. Therefore, the present invention is capable of greatly expanding the measurement range.

[0004]

According to the present invention, it is possible to change the position of one or both of the idler rollers.

[0005]

With this, it becomes possible to significantly widen the tension measuring range in the tension measuring system.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the tension measuring system of the present invention, as shown in FIG.
To change the position of idler rollers 4 and 5 shown in
The problem is how to calculate the actual tension value T for the change. Figure 3 shows the roller 1 of the tension measurement system.
4 and 5 are the layouts in the cross-sectional direction applied to the coordinate system. Here, the wrap angle 2θ of the idler rollers 4 and 5 is
A method for quantitatively evaluating the change in the resultant force F and the change in the tension value T with respect to the change will be described. Further, for ease of consideration, the coordinate system is set only on the idler roller 5 side. In FIG. 3, the center of the tension roller 1 is the origin of the coordinate system, and the center of the idler roller 5 is (x, y).
The angle formed by the sheet material 6 and the y axis is half the wrap angle 2θ,
Consider as θ. Sheet material 6 is tension roller 1
And the idler roller 5 are in contact with each other, and their contact points are (a, b) and (c, d), respectively, as shown in FIG. Also,
The radii of the tension roller 1 and the idler roller 5 are r1 and r2, respectively. First, when the coordinate positions of a, b, c and d are represented by r1, r2, x, y and θ, the following (3) to
Equation (6) is obtained. By the way, according to the following equation (7),
Substituting the equations (1), (2), (3), (4), and (5) into the equation (6) and rearranging it yields the following equation (8). ) Formula holds. And θ
When it is corrected to, the following equation (10) is obtained. Therefore, (1
Substituting equation (0) into equation (2) yields equation (11) below. Therefore, from the formula (11) below, the idler roller 5
The change of the tension value T with respect to the change of the position of is evaluated. In an actual system, a linear guide or an XY table is attached to the bearing portion of the idler roller 5 so that the position of the idler roller 5 is variable, and a servomotor or the like is used for positioning. Also (1
The calculation of the equation (1) can be performed by using a commercially available controller that has a programmable calculation function. Figure 4
Shows an example of an actual system. FIG. 4 shows the case where the idler rollers 4 and 5 are moved only in the vertical direction and with the same amount of displacement.

The idler rollers 4 and 5 are attached to columns 7 and 8 which can be moved up and down by linear guides,
Moreover, the idler rollers 4 and 5 are connected by the bar 9 so that the vertical displacements thereof are the same. The idler rollers 4 and 5 can be moved up and down by the ball screw 10 attached to the central portion of the bar 9 and the motor 11. The position data of the idler rollers 4 and 5 is output from the encoder 12 through the position signal line 15 of the idler roller, and the resultant force of the tension of the sheet material 9 is output from the tension sensor 3 to the resultant force signal signal line 1.
It is output through 4.

The idler position signal line 15 and the resultant force data signal line 14 are input to the controller 13, and the tension value is calculated in the controller 13 together with the previously input diameter data of the idler rollers 4 and 5. ..

[0009]

[Equation 1]

[0010]

As described above, according to the present invention, the measuring range of the tension measurement is widened as compared with the conventional one, so that a wide-range measuring system can be constructed and can be generalized as a system.

[Brief description of drawings]

FIG. 1 is a diagram of a hardware configuration of a tension measuring system.

FIG. 2 is a vector composition diagram of tensions in FIG.

FIG. 3 is a diagram in which the positions of rollers in FIG. 1 are applied to a coordinate system.

FIG. 4 is a diagram of an actual system example of the present invention.

[Explanation of symbols]

 1 Tension Roller 2 Bearing Block 3 Tension Sensor 4,5 Idler Roller 6 Sheet Material 7,8 Support 9 Bar 10 Ball Screw 11 Motor 12 Encoder 13 Controller 14 Result Data Signal Line 15 Position Signal Line

Claims (1)

[Claims] 1. A tension measuring device comprising a tension measuring roller, a bearing block holding the tension measuring roller, a tension detecting sensor mounted under the bearing block, and a pair of rollers required to apply tension. A tension measuring system capable of changing one or both positions of a pair of rollers required to apply the tension.