JPH1133626A - Coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation in a tier shape or a projection shape at the tip part of the beginning of winding from being generated by covering the tip part of the beginning of the winding of the aluminum/aluminum alloy sheet metal on a paper tube spool by a compressible and flexible member. SOLUTION: When winding the aluminum or an aluminum alloy sheet shape materials 3 of about 0.1 to 3 mm in thickness on the paper tube spool 11, the tip parts 4 of the sheet shape materials 3 are covered by a wadding member 7, and the wadding member 7 is made to lie between the sheet shape materials 3 overlapped on this tip part 4. The wadding member 7 is the one which is compressible and excellent in flexibility, for instance, it is the one obtained by cutting a polyethylene sheet material in a proper size. In addition, the thickness of the wadding member is about 0.5 to 5.0 mm corresponding to the thickness of a metal sheet. When the thickness of the metal sheet is thin to be <0.5 mm, it is preferable that two stocks 10 of 0.5 mm in thickness, obtained by cutting the wadding, are placed one upon another over a center part, and a part 8 covering the tip part 4 of the sheet shape material 3 is referably thicker than both tip parts 9 of the wadding member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil formed by winding a plate-like material having a predetermined width, and more particularly to a coil in which a step-like mark is prevented from being generated at a coil winding start portion.

[0002]

2. Description of the Related Art Conventionally, in order to wind a sheet material having a predetermined width, the sheet material is wound in a state in which a winding reel of a winding machine is expanded, and then the diameter of the winding reel is reduced. After removing the wound coil, or by inserting a cylindrical spool (tubular body) into the take-up reel, the diameter is increased, and the plate-like material is wound on the spool. After the diameter is reduced, the coil wound with the spool is removed.

[0003]

However, in either case of directly winding on the take-up reel itself of the above-mentioned winding machine or winding on a spool, the plate-like material outside the leading end portion of the winding start of the plate-like material is used. The trace of the tip portion is formed on the material in a step-like manner, and the step-like trace affects the dozens of turns from the innermost plate-like material to the outside and occurs. In particular, those with a thin plate material,
For example, a plate-like material having a thickness of 0.2 to 0.3 mm is greatly affected by the above-mentioned step-like traces.
In some cases, the influence may occur up to about 0 mm.

[0004] The portion where these step-like marks are generated cannot be used as a plate requiring strict flatness. Further, even if this portion is subjected to rolling or straightening again, the stepped trace cannot be sufficiently eliminated, which has been a factor of reducing the yield.

SUMMARY OF THE INVENTION An object of the present invention is to provide a coil having a predetermined width and having a high quality with little stepped traces at the leading end of the plate at the beginning of winding of the plate when winding the coil. Is to provide a coil.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a coil having a predetermined width of a plate-like material wound thereon, and a flexible member which can be compressed is provided at the leading end of the plate-like material. That is, it is interposed between the front end portion and the plate-shaped material located outside the front end portion so as to cover the portion.

[0007] When a suitable tension is applied to the plate-like material and the plate-like material is wound by interposing a compressible flexible member, the step-like shape of the leading end portion of the winding of the plate-like material or the step-like shape of the projecting shape. The occurrence of traces can be prevented by the compressible flexible member absorbing and damping by compression and flexure, and a coil of excellent quality can be obtained.

Further, in the above-mentioned coil, the compressible flexible member may be formed such that a portion covering the leading end of the plate-shaped material of the member is thicker than both ends of the flexible member. It is. Since the portion covering the leading end of the winding of the plate-shaped material is formed thicker than both ends of the flexible member, a step-like trace due to the leading end of the winding of the plate-shaped material is generated on the plate-shaped material. In addition, since the both ends of the compressible flexible member are formed relatively thin, the plate-like material is smoothly wound, and unnecessary step-like marks are not generated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a coil according to the present invention will be described below in detail with reference to the drawings. In addition, FIG.
In FIG. 4, the same or equivalent parts are denoted by the same reference numerals.

FIG. 1 is a sectional view of an essential part showing an embodiment of a coil according to the present invention. Coil 1 of the present embodiment
Is obtained by winding a plate-like material 3 having a predetermined width around a spool 11 which is a cylindrical body. At this time, the cushioning member 7, which is a compressible flexible member, is attached to the leading end 4 and the plate member 5 located outside the leading end 4 so as to cover the leading end 4 of the winding of the plate member. It is interposed between. Further, as shown in FIG. 4, the buffer member 7 may be placed outside the plate member 5 corresponding to the tip of the plate member, and the plate member may be sequentially wound and interposed. Here, the cushioning member 7 is formed by doubly overlapping the buffer cutting material 10 having a constant thickness over the center portion, and the portion 8 covering the leading end of the plate-shaped material at the start of winding is formed thicker than both end portions 9. ing. The cushioning member 7 shown in FIG. 4 is formed integrally.

The plate material is made of aluminum or an aluminum alloy, and the thickness of the plate is about 0.1 to 3 mm. The coil 1 is obtained by winding the plate-shaped material 3 in a coil shape. The use of the coil includes, for example, a printing plate.

The cushioning member 7 is preferably made of a compressible soft material which is made of a soft and compressible material and which is rich in flexibility and excellent in cushioning properties, for example, Minafoam (trade name: manufactured by Sakai Chemical Industry Co., Ltd.). You can do it. Table 1 shows the optimum thickness (mm) of the buffer member 7 with respect to the thickness t (mm) of the plate member 3 forming the coil. For example, the thickness t of the plate member 3 is 1.5 mm. In the above case, the cushioning member 7
Is used alone having a thickness of 5.0 mm. or,
When the thickness t of the plate member 3 is 0.3 mm or more, the cushioning member 7
May be used alone, but when the thickness t of the plate-shaped material 3 is less than 0.3 mm, 0.5 m
It is preferable to use a single unit of m with a thickness of 1.0 mm at the center.

[0013]

[Table 1]

Further, the compression hardness H of the cushioning member 7 is optimally 0.1 to 0.3 kgf / cm ² . Here, the compression hardness H is a value tested by a test piece, an apparatus, and an operation specified in JIS K6767-1995, and is calculated by the following equation.

H = P / (Wl) where: H: Compressive hardness (kgf / cm ² ) P: Compressed 25%, load after 20 seconds (kgf) W: Width of test piece (cm) l: Test piece length (cm) Next, a method of interposing the buffer member 7 will be described.

FIG. 2 is a cross-sectional view of a main part of the coil 1 according to the embodiment shown in FIG. 1, showing a state immediately before winding is started. To interpose the buffer member 7, first, the spool 1
1, the leading end portion of the plate-shaped material 3 at the start of winding is fixed with a double-sided tape 13 and set so that the plate-shaped material 3 can be wound.
Next, the two buffer cut materials 10 are connected by a color-specific tape 14a so as to overlap substantially at the center, thereby forming a buffer member 7. The cushioning member 7 is fixed to the spool 11 at a position near the leading end of the winding of the plate-shaped material 3 using the color-specific tape 14b.

3A and 3B show the manner in which the buffer member 7 is interposed. FIG. 3A is a cross-sectional view of the same state as FIG. 2, FIG. 3B is a cross-sectional view of the inverted state of the buffer member 7, and FIG. Sectional views showing a state where the member 7 has covered the leading end of the plate-shaped material at the start of winding. As shown in FIG. 3A, when the reel 11 is rotated in a counterclockwise direction as indicated by an arrow 16 by a winder (not shown), and the plate material 3 is wound, as shown in FIG. 3B. Then, the buffer member 7 is inverted. Further, when the plate-shaped material 3 is wound up, as shown in FIG. 3 (C), the cushioning member 7 covers the front end portion 4 and the outside thereof so as to cover the winding start end portion 4 of the plate-shaped material. It can be interposed between the plate material 5 located.

The coil 1 of the present embodiment having the above configuration
Works as follows. That is, when the buffer member 7 is interposed between the leading end portion 4 at the start of winding of the plate material and the plate material 5 located outside the leading end portion, when the plate material 3 is wound with an appropriate tension. A flexible member capable of compressing the occurrence of a stepped mark due to the stepped shape or protruding shape of the leading end portion 4 at the beginning of winding of the plate-like material is absorbed and buffered by compression and bending to make the coil appropriately prevented. Can be done.

Further, the portion of the buffer member 7 which covers the leading end 4 of the plate member at the start of winding is formed thicker than both end portions 9 of the buffer member 7, so that the leading end 4 starts the winding of the plate member. While reliably preventing the occurrence of step-like traces that occur in parts,
The plate-like material is smoothly rolled and does not generate unnecessary marks.

In the coil 1 of the above embodiment, the cushioning member 7 has a double portion 8 covering the leading end portion 4 at the beginning of winding, but is formed integrally and thin at both ends. Alternatively, the thickness may be continuously increased toward the center (see FIG. 4).

Although the coil 1 has a spool 11, the present invention is not limited to this, and can be applied to a coil without a spool.

[0022]

EXAMPLES Next, examples tested under the following conditions will be described.

An aluminum alloy plate was used as the plate member 3, and a paper tube spool having a plate thickness of 0.2 mm and an outer diameter of 500 mm was used. The compression hardness of the cushioning member 7 is 0.16 kg.
A polyethylene sheet having an f / cm ² and a thickness of 0.5 mm was double-layered at the center and used so that both ends became a single unit. 0.5 kg of tension when winding plate material 3
As f / mm ² , the degree of generation of a stepped mark of the wound coil was examined. Regarding the portion where the step-like mark is generated, the dimension measured in the radial direction from the innermost side to the outer side of the coil is 1 mm or less, which is 1/20 or less compared to 20 mm generated by the conventional coil. The prevention of trace formation has been greatly improved.

[0024]

According to the coil of the present invention, it is possible to obtain a coil having a high quality and a high yield with little stepped marks generated on the plate-shaped material at the beginning of winding.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of a coil according to the present invention.

FIG. 2 is a cross-sectional view of main parts showing a state immediately before starting winding in the coil of the embodiment of FIG. 1;

3 (A) is a cross-sectional view of the same state as in FIG. 2, FIG. 3 (B) is a cross-sectional view of the inverted state of the buffer member, and FIG. In a state in which the leading end of the winding is covered.

FIG. 4 is a sectional view of a main part showing another embodiment of the coil according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil 3 Plate-shaped material 4 Winding start tip part 5 Plate-shaped material located outside the tip part 7 Buffer member (compressible flexible member) 8 Part of buffer member covering the winding start tip part of plate-shaped material 9 Both ends of cushioning member

Claims (2)

[Claims] 1. A coil having a plate-shaped material having a predetermined width wound thereon, and a compressible flexible member is attached to the front end and the front end so as to cover the starting end of the plate-shaped material. A coil characterized by being interposed between a plate-shaped material located outside. 2. The member according to claim 1, wherein the compressible flexible member is formed so that a portion of the plate-shaped material covering the leading end of the plate-shaped material is thicker than both ends of the member. And coil.