JPH05285540A - Method for preventing top mark of belt-like material and take-up bubber sleeve used for its method - Google Patents

Abstract

PURPOSE:To eliminate the need for exchange of material and many rubber sleeves because different materials from thin material to thick material coped with by one rubber sleeve. CONSTITUTION:In a method to prevent a top mark generated on 2 coils of belt like material lapped at the tip of the coiled belt-like material when the rubber sleeve is mounted on a take-up reel to coil a hard belt-like material, the rubber sleeve provided with a nearly belt-like soft layer 2 softer than the rubber sleeve in a barrel length direction on the outer periphery of the rubber sleeve 1 is used as the rubber sleeve and the tip of the belt-like material 5 is stopped in the range of the soft layer 2 and coiled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing a top mark of a hard strip such as a cold rolled steel sheet or a stainless steel sheet, and a winding rubber sleeve used in the method.

[0002]

2. Description of the Related Art When a conventional band-shaped material winding device winds up a hard band-shaped material, two or more windings of the band-shaped material overlap each other at the leading end of the wound band-shaped material to form a step-shaped fold called a top mark. There was a problem. As the thickness of the top mark increases, the number of coil turns transferred increases.

As a method for preventing the top mark, a method in which a rubber sleeve is inserted into a take-up reel and a strip is wound up is usually adopted, but the top mark is reduced but cannot be eliminated. FIG. 4 is a side view showing a conventional belt-shaped material winding device. The belt-shaped material 5 is wound up by a winding machine including a segment 7 having a mandrel 6 opening / closing mechanism. When the strip 5 is a general cold-rolled steel sheet, if the sheet with a thickness of 0.5 mm or more is wound, the top mark will be about 1 if unwound.
You can see about 00m. Therefore, in general, by providing a rubber sleeve 8 having a thickness of about 25 mm, the top mark is reduced to about 30 m.

Further, as disclosed in Japanese Patent Application Laid-Open No. 52-18451 and the like, a method in which a rubber sleeve is stepped and the tip end of the belt-like material is stopped at this stepped portion to wind up is most surely to prevent the top mark. However, it has the following drawbacks. That is,
The characteristic of the stepped rubber sleeve is that it is necessary to stop the line at the tip of the belt-shaped material so that it is exactly aligned with the stepped portion. If the position shifts, there will be two steps: the rubber sleeve and the tip of the belt-shaped material. In addition, there is a problem in that the efficiency becomes lower, such as a larger top mark when a belt-like object rides on the stepped portion, and the promotion of quality defects.

This will be described with reference to the drawings. FIG. 5 shows an enlarged side view of using a stepped rubber sleeve. By providing the rubber sleeve 8 with the stepped portion 9 and winding the tip end portion 5a of the strip 5 along the stepped portion 9, the top mark can be almost completely eliminated. However, it is very difficult to accurately align the tip 5a of the strip 5 with the stepped portion 9. Further, in addition to the problem that the rubber sleeve 8 needs to be replaced due to the plate thickness of the band-shaped material 5, it takes time to align the position, which is inefficient. Further, in the case of a steel plate or a stainless steel plate, various top mark prevention methods have been adopted, such as grinding the tip end in a taper shape (Japanese Utility Model Laid-Open No. 62-184961) or winding the cardboard paper at the same time. , It took extra time and there was a problem with certainty.

[0006]

SUMMARY OF THE INVENTION The present invention is used in a method for preventing the top mark of a belt and a method thereof, which solves the above-mentioned drawbacks, particularly the drawback of the stepped rubber sleeve which is the most reliable method for preventing the top mark. An object is to provide a rubber sleeve for winding.

[0007]

According to a first aspect of the present invention, when a rubber sleeve is mounted on a take-up reel and a hard strip is wound up, two or more strips are wound at the tip of the wound strip. In a method for preventing overlapping top marks, a rubber sleeve provided with a substantially strip-shaped soft layer softer than the rubber sleeve in the outer circumferential direction of the rubber sleeve is used as the rubber sleeve, and the tip of the strip is A method for preventing top marks of a band-shaped material is characterized in that it is stopped within the range of the soft layer and wound up.

According to a second aspect of the present invention, there is provided a top mark preventing method for a belt-shaped article according to claim 1, characterized in that a substantially band-shaped soft layer softer than the rubber sleeve is provided in a circumferential direction of a rubber sleeve. It is a rubber sleeve for winding.

[0009]

[Working] The present invention uses a rubber sleeve in which a substantially strip-shaped soft layer softer than the rubber sleeve is provided in the outer circumferential length direction of the rubber sleeve, and the tip of the strip is stopped within the range of the soft layer. It was made to be wound up. By stopping the tip of the strip-shaped material to be wound on this strip-shaped soft layer, the tip portion is sunk into the soft portion by the strip-shaped material of the second and subsequent windings, so that the top mark can be prevented.

The width of the strip-shaped soft layer is set to a range in which the strip-shaped soft layer can be reliably stopped in accordance with the stopping precision of the tip end of the strip-shaped material to be wound. Therefore, automation is also possible. The hardness of the rubber sleeve is about 60 to 90 degrees in terms of durometer, but the hardness of the band-shaped soft layer is about 30 to 60 degrees. Also,
It is preferable that both ends of the strip-shaped soft layer be provided with taper so that the top mark is not attached due to a step at the boundary with the hard portion.

[0011]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a rubber sleeve of the present invention, and FIG. 2 is a partial sectional view of the same. In FIGS. 1 and 2, 1 is a rubber sleeve, and 2 is a substantially strip-shaped soft layer that is softer than the rubber sleeve 1 and is provided in the outer peripheral body length direction of the rubber sleeve 1. The boundary is tapered 3 so that the dent is smooth.

In order to manufacture the rubber sleeve of the present invention, after the cylindrical hard rubber sleeve 1 is manufactured, cutting is performed in the longitudinal direction of the body, and after the groove processing, sponge or soft rubber is adhered to provide the band-shaped soft layer 2. .. The width A and the depth of the soft layer 2 are appropriately selected and determined depending on the handling material.

FIG. 3 is a sectional view showing the state of the winding portion of the steel strip when the rubber sleeve of the present invention is used. The rubber sleeve 1 has a rubber hardness of 60 to 80 degrees, and a belt-shaped soft layer 2 having a rubber hardness of 30 to 60 degrees is provided on the surface layer in the longitudinal direction of the rubber sleeve 1. The width A of the strip-shaped soft layer 2 is set to 60 mm because of the precision with which the steel strip can be stopped normally. The depth of the strip-shaped soft layer 2 was 1.5 mm, which is the maximum handling plate thickness.

When a 0.5 mm thick steel strip 4 is wound up using this rubber sleeve 1, the tip 4a of the steel strip sinks into the soft layer 2 as shown in FIG. Top mark defects no longer occur on the steel strip.

[0015]

The rubber sleeve according to the present invention is damaged by the tip of the belt-like material to be wound up, but since it can be partially repaired, it is inexpensive because it does not require the entire renewal as in the prior art. Also, since a single rubber sleeve can be used for a wide variety of materials from thin plates to thick ones, there is no need for replacement and many rubber sleeves are not required.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a partial sectional view of an embodiment of the present invention.

FIG. 3 is a partial sectional view showing a usage state of the rubber sleeve of the present invention.

FIG. 4 is a side view of a conventional belt-shaped material winding device.

FIG. 5 is a partial cross-sectional view showing a usage state of a conventional stepped rubber sleeve.

[Explanation of symbols]

 1 rubber sleeve 2 strip soft layer 3 taper part 4 steel strip 4a tip part 5 strip 5a tip part 6 mandrel 7 segment 8 rubber sleeve 9 stepped part

Claims (2)

[Claims] 1. A method for preventing a top mark, which is generated when two or more strips are overlapped with the leading end of the wound strip when the rubber sleeve is mounted on the take-up reel and the hard strip is wound up. As the rubber sleeve, a rubber sleeve in which a substantially strip-shaped soft layer softer than the rubber sleeve is provided in the outer circumferential body length direction of the rubber sleeve is used, and the end of the strip is stopped within the range of the soft layer and wound. A method for preventing the top mark of a band-shaped material, which is characterized by taking. 2. The winding for use in the method for preventing the top mark of a belt-like article according to claim 1, wherein a substantially belt-like soft layer softer than the rubber sleeve is provided in the outer circumferential body length direction of the rubber sleeve. Rubber sleeve.