JPH06277737A - Clamp device for entrance and exit guide of rolling mill - Google Patents

Abstract

PURPOSE:To provide a highly efficent guide clamp device extremely high in safety and workability and capable of tightening and loosing a clamp of a rolling mill entrance/exit guide instantaneously. CONSTITUTION:The leg part 6 of the guide 1 of the rolling mill entrance/exit is made in a offset shape, a distance between a clamped position of the guide leg part and a pass line is reduced drastcally, the guide leg part is mounted on a rest bar 2, the guide leg part 6 is always clamped and fixed by a fluid pressure cylinder 4 set below the rest bar 2 and a vertical clamp plate 3 whose fulcrum is fixed freely oscillatorily to the rest bar 2. Then, since the guide is made so that it can be tightened or loosened by the on-off operation of a fluid pressure control valve to release the clamp through the release of the fluid pressure of the fluid pressure cylinder 4, the guide can be set freely attachably and detachably through one action.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an entrance guide for a rolling mill and a clamp device for the guide.

[0002]

2. Description of the Related Art It is well known that, in the past, an entrance guide was used and a roller guide was frequently used when rolling steel bars, wire rods, etc., but recently, the guide body has become larger as the material cross section becomes larger. ing.

On the other hand, with the production of a wide variety of products and small sizes in a large number, the rolls and sizes are often changed to simplify the guide mounting.
The demand for labor saving is increasing.

As a method of attaching the guide, as shown in FIGS. 5 and 6, the guide main body 11 is placed on the rest bar 12 attached to the stand, and the legs 16 are attached to the clamp plate 1.
3, a hammer 14 and a nut 15 for the rest bar 12
The most commonly used method is to fix the In the figure, a'denotes the length of the leg of the guide body, and b'denotes the distance between the tightening position of the leg and the pass line.

[0005]

In this method, when the guide body is small, there is not much problem, but as the size of the guide body increases, the bolts and nuts become larger and the clamping force must be increased. Work has become difficult and large-scale special tools are needed.

In the rolling mill entrance / exit guide, the guide is constantly adjusted by moving the rolls. When the guide is tightened in an unbalanced manner with the bolt axis tilted, work is carried out in a short time while being hung by a crane. At the same time, the guide may drop from above the bulken due to poor balance.In particular, the output side guide is in direct contact with the force of the rolled material coming out of the rolling rolls, so the conventional clamp bolt method causes a lot of loosening and increases. Many cases are tightened. Further, in this method, unless the clamp is always set vertically, the bolt head nut may come into point contact, which may cause settling, resulting in loss of bolt tension and loosening. Further, the tightening by human power has a problem that the tightening torque lacks stability because the tightening torque varies depending on the age difference and the friction coefficient of the screw portion.

Recently, a method has been used in which the hydraulic power is used for tightening and loosening the mallet bolt 14 and the nut 15 to save labor. As this kind, for example, JP-A-49
Although there is one shown in Japanese Patent Publication No. 87557 (see FIG. 6),
The method using bolts and nuts uses the elasticity of the bolts, and is greatly affected by the properties of the crimping surface of each part, and the tightening force is greatly attenuated by a slight distortion, so retightening during operation was forced. . In the figure, c'is the clamp plate 1
3 shows the distance between the leg tightening position of 3 and the center line of the mounting axis of the clamp plate 13 to the rest bar 12, and e'is between the grounding wire of the clamp plate 13 to the rest bar 12 and the leg tightening position of the guide body 11. The leg tightening force is a distance d '/ e' = (e ') of the pulling force of the mallet bolt 14.
-C ') / e', and the longer the distance of c ', the smaller the leg tightening force.

In the method using the hydraulic device 18 shown in FIG. 6, a removable rhombic block 17 is interposed between the guide leg portions 16 held by the clamp plate 13, and the clamp plate is used to remove the guide body 11. The guide body 11 cannot be removed from the rest bar 16 unless the diamond block 17 is removed by loosening and retreating.
It is troublesome because the work of fitting and removing is required. The present invention aims to solve these problems.

[0009]

SUMMARY OF THE INVENTION The present invention was developed to eliminate such drawbacks. The legs of the rolling mill entrance / exit guide are offset, and the distance between the guide leg tightening position and the pass line is greatly increased. And install it on the rest bar, attach a fluid pressure cylinder with gas or liquid under the rest bar, and attach the cylinder rod of the fluid pressure cylinder to the rest bar at one end of a lever-shaped clamp plate with its fulcrum fixed to the rest bar. It is connected and fixed by tightening the cylinder at all times, and in order to release the clamp by releasing the fluid pressure of the cylinder, the guide leg is tightened by turning the fluid pressure control valve on and off, and it can be loosened with one touch. It is configured so that it can be freely attached.

[0010]

According to the present invention having the above-described structure, the entrance / exit guide of the rolling mill is substantially the same as the conventional method, but the leg portion 6 of the guide body is offset to increase the length a of the leg portion, The distance b between the tightening position and the pass line should be as short as possible to increase a / b to increase the stability of the guide body against tipping due to threading, and the clamp plate that clamps the guide should be a lever-shaped part. The fulcrum is swingably fixed to the rest bar, and the other end is pushed to clamp the guide body, which makes it possible to achieve a tightening effect that is several times that of the conventional method. Direct pressure clamping with a pressure cylinder is now possible.

[0011]

1 is a side view showing the structure of the present invention, FIG. 2 is the same front view, FIG. 3 is the same top view, and FIG. 1 is a cross-sectional view of an essential part of FIG. 1, in which a guide main body 1 in which a leg portion 6 of a rolling mill entrance / exit guide is offset is placed on a rest bar 2 attached to a stand, and the leg portion 6 is fixed to the rest bar 2 by a clamp device. To be done. It is arranged in two rows and the position shown in phantom in FIG. 2 according to the guide body pass line, or in the case of a single row, one rolling mill entrance / exit guide 1 is aligned with the pass line of the rolled material and the rest bar is arbitrarily placed. The hydraulic cylinders are also installed in two places in order to mount the clamp plate to the full width of the rest bar. Reference numeral 10 in the drawing denotes a twist roller incorporated in the guide body 1.

The clamp device has a lever-shaped clamp plate 3, a mounting shaft 7 for mounting the lever-shaped clamp plate 3, a fluid pressure cylinder 4 using air or hydraulic pressure, and a fluid pressure cylinder for swingably mounting the rest bar 2. The cylinder mounting pin 9, the cylinder rod 5, and the connecting pin 8 for connecting the cylinder rod 5 and the clamp plate 3 to each other. The fluid pressure cylinder 4 is attached to a fluid pressure unit such as air or pressure oil, which is separately installed, It is connected by piping through a control valve. The guide body 1 is detachably fixed to the rest bar 2 by turning on / off the control valve.

The fluid pressure cylinder 4 is, of course, designed to generate a necessary force according to the size of the guide and the resistance force of the threading material, but as shown in FIG.
By making the leg 6 of the offset type offset, making the distance b between the clamping position of the clamp plate 3 and the pass line as small as possible, and making the length a of the leg 6 as large as possible and making a / b large, The stability of the guide body 1 against falling and wobbling due to the material is doubled.

Further, the clamp plate 3 is formed into a lever shape to shorten the distance c between the mounting shaft 7 and the tightening position of the leg portion 6 and lengthen the distance d between the mounting shaft 7 and the cylinder rod connecting pin 8 to obtain c / By making d large and doubling the tightening effect of the guide body leg portion 6, the fluid pressure cylinder 4 can be made extremely small, and the compact design is built in the space under the rest bar 2.

As described above, the legs of the guide body are offset, and the tightening position is as close as possible to the pass line, whereby it is possible to increase the stability of the guide body against falling due to threading. In addition, a lever-shaped clamp plate is used with the center of the clamp plate that clamps the guide legs as a fulcrum, and the guide body is clamped by swingably fixing the fulcrum to the rest bar and pushing the other end. By doing so, it is possible to exhibit a tightening effect several times that of the conventional method.

[0016]

As described above, the present invention exhibits a clamping effect several times that of the conventional method, which enables a compact design and can be applied to both large and small guides.
Clamping force is not attenuated by constant direct pressure clamping of the guide, and there is no need to retighten during operation, and the guide is placed on the rest bar to clamp the fluid pressure control valve on / off. Since it can be tightened and loosened, it is possible to provide a highly efficient guide clamp device having extremely high safety and workability.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a top view of the same.

FIG. 4 is a cross-sectional view of an essential part of FIG.

FIG. 5 is a side view showing a conventional clamp device.

FIG. 6 is a side view showing another conventional clamp device.

[Explanation of symbols]

 1 Guide body 2 Rest bar 3 Clamp plate 4 Fluid pressure cylinder 5 Cylinder rod 6 Guide body leg 7 Clamp plate mounting shaft 8 Cylinder rod connecting pin 9 Cylinder mounting pin

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[Procedure amendment]

[Submission date] February 17, 1993

[Procedure Amendment 1]

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[Figure 1]

[Procedure Amendment 2]

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[Figure 4]

[Procedure 3]

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[Figure 5]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Horo Gibe 3-4-11-104 Takasu Mihama-ku, Chiba City, Chiba Prefecture

Claims (1)

[Claims] 1. The rolling mill entrance / exit guide has an offset leg, and the distance between the guide leg tightening position and the pass line is greatly shortened to be installed on the rest bar. The guide leg is attached below the rest bar. The guide leg is always clamped and fixed by the fluid pressure cylinder and the lever-shaped clamp plate with the fulcrum fixed to the rest bar, and the guide is released by releasing the fluid pressure of the fluid pressure cylinder to release the clamp. A rolling mill entrance / exit guide clamping device, which can be attached and detached with one touch by turning on and off.