JPH01265132A - Tension detector - Google Patents

Abstract

PURPOSE:To perform the tension detection of a wire rod, etc., by a simple structure by providing the differential transformer detecting the mechanical displacement of the following hinge between the base plate combined by the hinge and a fitting plate. CONSTITUTION:The supporting material 16 consisting of the hinges of more than four places having elasticity is formed on a base plate 8 and both ends of the fitting plate 10 opposed thereto. The differential transformer 14 consisting of the coil 14a fixed to the base plate 8 and coil 14b fixed to the fitting plate 10 is provided between said base plate 8 and fitting plate 10. When a load is loaded on a bearing by the long-sized material wound on a detection roll, the supporting material 16 between the base plate 8 and fitting plate 10 is displaced mechanically. The differential transformer 14 outputs the electric signal corresponding to this mechanical displacement.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a tension detection method for detecting the tension of a flexible elongated material, such as a web material such as paper, film, cloth, or metal foil, or a wire material such as a cable. It is related to vessels.

[Conventional technology]

An explanation of the configuration of the prior art is shown in FIGS. 4, 5, and 6, which are disclosed in Japanese Patent Laid-Open No. 61-28834.

Generally, when winding or unrolling flexible long materials such as paper or film, this is to prevent the material from being cut, stretched, or wrinkled due to changes in tension due to changes in the zero roll diameter. As shown in Figure 4, the tension detector (1) is connected to the detection roll (2) and the bearing (3).
and a fixed part +41 that supports this bearing (3), and is applied to a flexible long material (5) that is wrapped around the detection roll (2) at an appropriate angle. It detects tension. Conventionally, as this type of tension detector, the fifth
What is shown in FIG. 6 and FIG. 6 is known.

Next, the operation will be explained. In the tension detector shown in FIG. 5, a bearing for a detection roll (not shown) is attached to an end of a support member (9) erected at one end of a base plate (8). One end of the mounting plate (IG) is configured to be slightly rotatable around the fulcrum O of the cross spring a11, and the load applied to the mounting plate through the bearing causes the main leaf spring αJ to be moved through the hammering of the transmission leaf spring. The mechanical displacement amount of the main plate spring αJ at this time is detected as tension by the differential transformer α4.The tension detector shown in FIG. One end is connected by a C-shaped support member α9 having spring properties, and the amount of mechanical displacement between the base plate (8) and the other end of the mounting plate (1 (l), which is displaced by a load, is detected by differential transformer I. It is detected as a device.

[Problem to be solved by the invention]

In both Figures 5 and 6, the mounting plate is used as a cantilever beam, so in order to increase the deflection, the length of the mounting plate αG must be increased, or the length of the main leaf spring αJ,
The thickness of the C-shaped support member α9 must be reduced, which poses a problem in that the withstand strength against large changes or large loads as a whole becomes small. Also, since it is a cantilever beam, the fulcrum of the cross spring strike is O,
A bending moment acts around the fulcrum 0 of the C-shaped support member (2).

Since the mounting plate 0α bends in the rotational direction, there is a problem in that not only vertical movement but also horizontal movement is added, and the tension changes due to this horizontal movement, causing wrinkles, elongation, etc. in the flexible elongated material. The Ryuteki shown in Figure 5 uses many springs, so its structure is complicated.

In addition, there is a problem that the number of parts increases, and in the case shown in Fig. 6, the C-shaped support member α9 is notched in several places, which causes stress concentration and there is a risk of wear and tear in the early morning. There is. Also, the cross spring αD in FIG.

When the load applied to the transmission leaf spring (2), the main leaf spring circle, and the C-shaped support member shown in Fig. 6 increases by two or three times, the thickness of the spring and support member increases with respect to the load. However, there is a problem in that there is almost no reusability of springs and support members from low to high loads (in series).

This invention was made in order to solve the problems mentioned in t above, and aims to provide a tension detector which has a simple structure and is highly durable.

[Means to solve the problem]

In order to achieve the above-mentioned object, the tension detector according to the present invention comprises a base plate that is attached to a fixed part, and a mounting plate that is placed opposite to the base plate, and has hinges (notches) at four or more places having the same elasticity on the left and right sides at both ends of the base plate. In addition to fixing the supporting material, a conversion element is interposed between the base plate and the mounting plate, which converts and outputs the mechanical displacement of the supporting material consisting of the four or more notches (notches). It is something.

[Effect]

In the tension detector of the present invention, when a load is applied to the bearing by a long material wrapped around a detection roll, four or more elastic hinges fixed to both ends of a base plate and a mounting plate disposed opposite thereto are activated. The supporting material (notch) is displaced perpendicularly to the mounting plate.
Ru. Also, the load is doubled or tripled (if it becomes, the same 4
This can be handled simply by increasing the number of supporting materials that consist of hinges (notches h) at more than 3 locations, and the support material's □
There is almost no stress concentration due to the large number of notches.

[Embodiments of the invention]

λ in FIG. 1 is a front view of a tension detector showing one embodiment of the present invention. In the figure, (8) is a base plate that is attached to an appropriate fixing site (not shown).

Both ends of this base plate (81 and the mounting plate placed opposite to it are made of the same AE tool steel on the left and right sides,
(Six sharp notches indicated by 16) The supporting material is fixed one by one.

Then, it was attached to the support member αη installed in the center of the base plate (8) (14 coils and the mounting plate α
A round differential transformer consisting of a core (14b) installed in G is installed, and the differential transformer aΦ is attached to the mounting plate α
A coil (14a), which is a type of conversion element that converts the mechanical displacement caused by the support member αe into voltage and outputs it as tension due to the load applied to Q, is attached to the mounting plate 00, and '3
A (14) may be attached to the base plate (8).

To briefly describe the operation of the configuration described below, when a load is applied to the bearing by a long material wrapped around the detection roll, it is fixed to both ends of the base plate (8) and the mounting plate 00. The same support material GG) on the left and right is the mounting plate Q.
Displaced perpendicularly to QI. Then, the tension on the long side is outputted as a voltage output by the differential transformer σ·D.

In addition, in the example L, the support material 00 having six (6) humerous notches is shown, but the present invention is not limited to this. good. Examples of specific structures of supporting materials having four or ten (uncommonly cut out) holes are shown in Figures a and b in Figure 2.

In addition, as shown in λ and b in Fig. 3, the support material UL having four or more small notches (t) is attached to the base plate (8) and the mounting plate (10) is increased to two on the left and right and four on both ends. The conversion element is not limited to a differential transformer.
For example, it may be a strain gauge type, magnetostrictive type, etc. displacement drowsiness converting confectionery, or a displacement fluid pressure converting element.

〔Effect of the invention〕

As described above, according to this invention, the structure can be simplified and the number of parts can be significantly reduced, and even if the load is doubled or tripled, the number of supporting parts remains the same. This can be achieved simply by increasing the number of parts, allowing parts to be reused, resulting in significant cost reductions and miniaturization of the external shape.

In addition, even if the load is heavy, the force is supported at both ends, so the support material bends perpendicularly to the mounting plate, which causes the mounting plate to move from side to side. There is no need to worry about wrinkles or elongation of long materials.

Also, the stress of the support material due to the load is seriously notched)
Since the stress is released from four or more locations, there is almost no stress concentration, resulting in increased durability.

[Brief explanation of the drawing]

In Fig. 1, a is a front view of a tension detector according to an embodiment of the present invention, b is a left surface view, C is a right side view, and a and b in Fig. 2 are respective notches. cross-sectional view of the support material,
ab in Fig. 3 is a front view of a tension detector related to a combination of supporting materials having four or more force points (1); Fig. 4 is a front view showing the arrangement of a general tension detector; Fig. 5; 6th
Each figure is a front view of the prior art. fi+...Tension detector, (2)...Detection roll, (
4)...Fixed part, (5)...Long material, (8)...
・Base plate, αD...Mounting plate, u, p
...Differential transformer, α port...has elasticity. A support material made up of four or more modest notches. (16th)...Humble notch) part. In addition, in FIG. 9, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 (b) Figure 4 Figure 5 1θ Figure 6 Iθ Procedure amendment band (voluntary) 1. Indication of case Patent Application No. 1983-93926 3. Representative of the person making the amendment Moriya Shiki & Detailed explanation of the invention of the Mei IB book subject to amendment. 6. Contents of the amendment (11. The description is amended as follows.

Claims (1)

[Claims] In a tension detector interposed between a bearing of a detection roll around which a flexible elongated material such as paper or film is wrapped at an appropriate angle, and a fixed part that supports this bearing, the fixed part A support member consisting of elastic hinges (notches) at four or more places is fixed to both ends of the base plate to be attached to the base plate and the mounting plate placed opposite thereto, and at least the above four or more places are attached between the base plate and the mounting plate. A tension detector characterized in that it is constructed by interposing a conversion element that converts and outputs the mechanical displacement of a support material formed by a hinge (notch).