JP2959743B2 - Tension detection wheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension detecting wheel capable of detecting a wire tension applied to an electric wire during wire drawing.

[0002]

2. Description of the Related Art Conventional tension detecting wheels include, for example, Japanese Patent Publication No. 59-39694 and Japanese Patent Application Laid-Open No. 1-136509.
And Japanese Patent Application Laid-Open No. 1-278212. Each of these prior arts is an angle-dependent equation based on a basic principle of measuring an angle generated between an electric wire and a wheel and calculating an extension tension based on a relational expression using the angle as a variable.

Therefore, a calculation mechanism for calculating the extension tension based on the angle given as a variable each time is indispensable. This is not a problem in the case of a construction in which the construction scale is large and the entire extension work is managed by a computer system, but is a problem in a construction of a scale that does not require the use of a computer system.

In the case of the angle-dependent type, an arm for angle measurement is indispensable, but there is a problem in connection with this arm. That is, there is a case where “noise” is generated due to the arm swinging more than necessary due to the shock received from the passing electric wire, and the measurement accuracy is unstable. Further, there is a problem that the arm is easily broken, and furthermore, there is a problem that it is necessary to perform a work of setting a tow rope or the like that first passes through the arm for each wheel, and the handling is troublesome.

A tension detecting wheel for the purpose of solving such a problem in the angle-dependent equation is disclosed in, for example, Japanese Patent Laid-Open No. 2-1.
No. 11207. This tension detection wheel is
In a so-called pressing load type, tension is detected by detecting a pressing load applied when an electric wire passes through a wheel and wheel in segments. Although this conventional pressing load type tension detection wheel is excellent in eliminating the problem in the angle-dependent type, it uses a segment structure in which the running members and wheels are divided into segments as a whole. This poses a new problem of overall complexity and size.

There is a so-called “D / D” condition for the factors that increase the size of the pressing load type. In other words, for a curved surface that receives a pressing load of an electric wire, a minimum radius of curvature allowed in relation to the diameter of the electric wire is determined in order to prevent deterioration of the electric wire, and what kind of structure satisfies this relation is determined. It greatly affects the overall size of the gold car.

[0007]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a tension detecting wheel that can realize a more compact structure of a pressing load type capable of solving the problems as in the angle-dependent type.

[0008]

A tension detecting wheel according to the present invention has an endless running member along a supporting member having a pair of front and rear wheels and a pressure receiving surface formed by an arc having a radius of curvature larger than the radius of curvature of the wheels. A rotating traveling body which is adapted to travel, and which is located between the two wheels and arranged such that the uppermost part of the traveling member on the pressure receiving surface of the support member protrudes from a line connecting the uppermost parts of the two wheels; The vehicle includes a support for supporting the body so as to be able to move up and down, and load detecting means for detecting a pressing load of an electric wire applied to the rotating traveling body via the support.

[0009]

In this tension detecting wheel, the pressing load type is realized compactly by effectively utilizing the structure of the two-wheel wheel in series. That is, since the rotating traveling body for detecting the pressing load is provided between the two wheels, the space between the two wheels can be effectively utilized, and the load is detected at the intermediate position of the support by the two wheels. By providing a pressing receiving surface of at most several tens of cm to the rotating traveling body, it is possible to sufficiently clear the data, and as a result, it is possible to realize a compact pressing load type.

In addition to the above compactness, the tension detecting wheel has the following advantages. In other words, a passing locus having a large radius of curvature can be formed by the two wheels and the rotating traveling body. As a result, the passing resistance when passing a rigid object such as a protector is greatly reduced as compared with a normal wheel. The advantage is that you can do it.

[0011]

Embodiments of the present invention will be described below. As shown in FIGS. 1 and 2, a tension detecting wheel 1 according to this embodiment.
Is composed of a pair of front and rear wheels 2, 2, a detection mechanism 3 provided between both wheels 2, 2, a guide roller 4 provided near each wheel 2, 2, and a frame body 5 supporting these. Has become.

Although the wheels 2 and 2 are shown in a simplified manner in the drawing, they have the same structure as that generally used in conventional wheels.

The detecting mechanism 3 includes a rotating traveling body 10, a support 1
1 and load detecting means 12. The rotating traveling body 10 has a belt-shaped traveling member 13 to which a number of small rollers (not shown) are attached, and a pressure receiving surface 14f formed by an arc having a predetermined radius of curvature, in this example, a radius of curvature several times larger than the radius of curvature of the wheel 2. Traveling member 1 on the pressure receiving surface 14f of the support member 14.
The uppermost part 3 is disposed so as to protrude from a line L connecting the uppermost parts of the wheels 2, 2.

Therefore, when the electric wire C passes in the state shown in FIG.
By pulling 3 in the traveling direction of the electric wire C, the traveling member 13 rotates and travels along the support member 14. In addition, a passing trajectory as shown in FIG. 1 is formed by the wheels 2 and 2 and the rotating traveling body 10, so that
The passage resistance at the time of passage of a rigid object such as a protector can be reduced.

The support 11 is for supporting the rotary traveling body 10 to be able to move up and down. The support rod 15 has one end connected to the rotary traveling body 10 with a pin, and the support rod 15
Is formed of a guide member 16 which supports the upper and lower members so as to be able to move up and down.

A load cell is used as the load detecting means 12, and the lower end of the support rod 15 is brought into contact with the load button 12b. Therefore, the pressing force applied to the rotary traveling body 10 by the passing electric wire C is detected by the load detecting means 12 via the support rod 15. The detected data is transmitted to a display device (not shown) via an amplifier 17 attached to the frame body 5, converted into a tension value, and displayed.

[0017]

As described above, the tension detecting wheel according to the present invention is configured such that the tension is detected by pressing the electric wire against the rotating traveling body provided between the pair of front and rear wheels. It is possible to obtain the tension value directly from the measured value without processing such as the above, effectively eliminate the problem of instability and breakage of the measurement due to the shock of the passing electric wire etc. Unchangeable handling properties can be obtained, and it is suitable for a wide range of applications from small-scale construction to large-scale construction, and furthermore, the passage resistance when a rigid object such as a protector passes can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a tension detection wheel according to the present invention.

Figure 2 is a side view in partial cross-section as viewed from the arrow A ₂ direction in FIG. 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tension detection wheel 2 Wheel 10 Rotating traveling body 11 Support body 12 Load detecting means 13 Traveling member 14 Supporting member 14f Press receiving surface C Electric wire

Claims (1)

(57) [Claims] 1. A tension detecting wheel capable of detecting the tension of a wire drawn on an electric wire being drawn, comprising a pair of front and rear wheels, and a pressure receiving surface formed by an arc having a radius of curvature larger than the radius of curvature of the wheel. A rotating member arranged such that the running member runs endlessly along the supporting member, and the uppermost surface of the running member on the supporting member is located between the two wheels so as to protrude from a line connecting the uppermost surfaces of the two wheels. Body and
A tension detecting wheel having a support for supporting a rotating traveling body so as to be able to move up and down, and a load detecting means for detecting a pressing load of an electric wire applied to the rotating traveling body via the supporting body.