Endless belt with slits for sheet belt coiling tension offering device

Abstract

The invention provides an endless belt with slits for a sheet belt coiling tension offering device, which comprises the endless belt (3) and a plurality of slits (35), wherein the endless belt (3) is formed by superposing an outer lateral surface layer (31) and an inner lateral surface layer (33) which are made from at least more than two layers of different materials; and the plurality of slits (35) are formed by cutting the overall width of the width direction of the length (longitudinal) direction of the endless belt by a predetermined depth at predetermined intervals on the outer lateral surface (31a), in contact with sheet belts (4), of the endless belt, are in sealing connection, can be provided for the sinking of micro bumps on the surfaces of each sheet belt and are pulled and deformed by the bumps to form micro cavities and generate negative pressures. As the endless belt (3) adopts the structure, when the micro bumps on the surfaces of the sheet belts are sunken into each slit (35), the sheet belts of which the surfaces have remaining oil films can be reliably captured; and simultaneously, as the slits in the sealing connection still can be pulled and deformed by the sunken micro bumps to generate the negative pressures, most of the slits, in contact with the surfaces of the sheet belts, of the endless belt all develop the function of a vacuum pump to absorb the sheet belts with the remaining oil films to reliably offer (apply) coiling tension.

Description

technical field [0001] The present invention relates to a slitter line used for cutting a wide metal strip into plural strips along the longitudinal direction or cutting off and cutting both ends of the strip into trimmings of a specific width On the trimming line, when rewinding the strip after cutting, it can provide uniform and sufficient tension without scratching the surface of the strip. endless belt), especially a device capable of imparting sufficient coiling tension to prevent relative slippage between the strip and the endless belt even when rolling oil or anti-rust oil is attached to the surface of the strip Loop belt for slits. Background technique [0002] The applicant's Japanese Patent Nos. 1,361,033 and 3,769,730 have prior art utilizing the difference in coefficient of friction between the front and back layers of an endless endless belt of a belt plate coiling tension imparting device. In these patented technologies, synthetic resins or synthetic resin-ba...

AI Technical Summary

Problems solved by technology

[0007] The convex parts on the surface of the circulation belt are used to remove the oil film, and the excluded oil will accumulate in the concave parts between the convex parts and then be discharged from the oil drainage holes formed in the concave parts to the back of the circulation belt, but will be collected in the concave parts without oil drainage holes. The oil content remains in the original position, because the oil film with this residual oil content is easy to cause slippage, so it cannot be applied to the thicker strip plate that requires a larger coiling tension, that is, the thickness range of the strip plate it is applicable to is limited (also i.e. not applicable to thick strip)

[0008] Or when there are concave or concave-convex parts on the surface layer of the endless belt, high surface pressure will be generated on the convex parts. Therefore, when the belt plate is thinner and thicker, the belt plate is held by the concave-convex surface, so the belt plate will be compressed. If there is a defect of concave and convex indentation, and if you want to avoid this defect and reduce the clamping pressure of the endless belt, the coiling tension will be insufficient or uneven or slippage will occur, and the strip plate cannot be coiled stably, or even coiling will occur. Loss of unwinding of strip coils

[0009] As mentioned above, the prior art utilizes the friction between the surface of the belt plate and the surface of the endless belt, but since it cannot completely eliminate the oil (oil film) on the surface of the belt plate, the only conceivable countermeasure is to try to make the surface layer of the belt plate and the endless belt The friction coefficient is greater than that of the back side of the endless belt, but due to the remaining state of the oil film, the friction force has its own limit

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