JPS646978Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rubber idle roller protection device in a metal strip processing line.

For example, when a metal strip is subjected to a prescribed heat treatment and then wound into coils of various sizes depending on the intended use, in order to avoid scratches on the metal strip as a product, as shown in Figure 1, A rubber idler roller 1 is used as the tension roller. In the figure, a metal strip 2 is fed by a pinch roller or the like from a heat treatment step (not shown), sheared into various lengths by a shear 3, and wound up by a coiler 4. In the figure, 5 indicates a guide table and 6 indicates a guide roller.

Here, the rubber idle roller is a rubber-like material in a broad sense that is softer and more elastic than the metal strip being treated, such as neoprene rubber, high neoprene rubber, or MC nylon (all product names). This refers to rollers with a coating (lining) made of rubber, and does not refer only to pure rubber rollers.

In such a metal strip processing line, after the strip 2 is sheared by the shear 3, the leading strip passes through the idle roller 1, and then, as shown in FIG. It collides with the idle roller 1 and damages the rubber part 8. If foreign matter accumulates in the concave part of the puncture wound, this accumulated foreign matter will eventually peel off from the rubber part and be wound into the coil 4 by the strip, creating a press scratch on the product strip, so this can be prevented. It is necessary to stop the line and frequently polish the idle roller 1 in order to clean the idle roller 1, and furthermore, it is necessary to frequently replace the idle roller, which reduces productivity.

The present invention was devised to protect the rubber idler rollers of the metal strip processing line as described above from collisions with the tips of the strips.
This is an attempt to solve the above-mentioned conventional problems.

In the present invention, as shown in FIG. 3, for example, after being sheared by the shear 3, before the tip 7 of the trailing strip collides with the idle roller 1,
A protective cover 9 for collision prevention is provided on the top surface of the idle roller, and the strip tip 7 collides with the cover 9 to prevent the strip tip 7 from directly colliding with the rubber part 8, and after the tip 7 passes, it is moved to the position 9' shown in the figure. This is to retract the cover 9.

In this case, the cover 9 may be installed just before the strip tip 7 collides with the idle roller 1, and various means can be applied, but the shear 3
It is also possible to synchronize with the shearing of , and it is also possible to provide an appropriate time lag.

The shape of the cover 9 is preferably an arc shape as shown in FIG. 3, but it is not limited to the arc shape, but can be in various shapes such as a polygonal line shape or a curved shape.

Further, the material of the cover 9 can be selected arbitrarily from metal, plastic, etc.

FIGS. 4 and 5 are a side view and a plan view of essential parts, respectively, showing an embodiment of the present invention.

In this embodiment, as the collision prevention protective cover 9, an arc-shaped table made of a steel plate is used, which includes an arc-shaped canopy portion 9a and leg portions 9b, 9b. This collision prevention protective cover 9 has both legs 9b and 9 attached to a shaft 11 provided on the axis of a support shaft 10 of the idle roller 1.
Each end of b is rotatably supported, and the strip 1
This structure covers the top surface of the rubber roll 1 to prevent its tip from colliding with the rubber roll 1. That is, one end of the hydraulic cylinder 12 is attached to the frame 13 with a pin 14, the other end is attached to the leg 9b of the cover 9 with a pin 15, and the driving force of the hydraulic cylinder 12 is applied until the cover 9 reaches the cover position 9' shown by the broken line. I'm trying to move it more. In the figure, 16 is an oil supply pipe.

In this embodiment, the hydraulic cylinder 12 is activated at the strip shearing timing of the shear 3 described above to move the protective cover 9 to the top of the roll 1, and after the strip tip passes over the cover 9, it is moved to the position 9'. I was able to evacuate.

When this example device was installed in a metal strip processing line, the tip of the sheared strip no longer collided directly with the rubber roll, eliminating the need for roll polishing and eliminating the accident of causing scratches on the strip due to foreign objects. Summer. In addition, since the rubber rolls were no longer damaged by collisions, the rubber rolls lasted longer, reducing the number of roll replacements and improving productivity.

In this embodiment, the protective cover 9 is coaxially supported on the roll shaft 10, but the present invention is not limited to this.In short, when the trailing strip tip enters, the top surface of the roller is supported. Any configuration can be used as long as it is located at the front and can be evacuated afterwards.

As described above, the present invention is an industrially useful invention that can effectively prevent the occurrence of scratches on the rubber idler rollers used in metal strip processing lines.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an example of a conventional strip processing line, Fig. 2 is an explanatory diagram of a situation where the tip of the strip collides with a rubber roll in the line of Fig. 1, and Fig. 3 is an explanation of the basic principle of the device of the present invention. Figures 4 and 5 show an embodiment of the device of the present invention, and are a side view and a plan view of essential parts, respectively. In the figure, 1: Rubber idle roller, 2: Strip, 9: Collision prevention protective cover.

Claims (1)

[Scope of utility model registration request] A rubber idle roller protection device comprising a rubber idle roller that conveys a metal strip in a metal strip processing line, and a protective cover for preventing collisions at the tip of the metal strip that covers the top surface of the idle roller.