JPH07178453A - Sleeve for reel - Google Patents

Abstract

PURPOSE:To provide a sleeve which eliminates the elongation, crack, etc., of a sleeve due to expansion/contraction and has long life. CONSTITUTION:On the outer circumference of an interior material 2 of >=50% of a sleeve thickness made of a rubber material of 200kg/cm<2> tensile strength, <=400% elongation, an exterior material 1 at coil side of >=10%-<=20% of a sleeve thickness made of a rubber material of 200kg/cm<2> tensile strength, >=300% elongation is fitted so that the ruggedness having a pitch of >=1/8 of a sleeve outside diameter is a boundary face with a height of >=5%-<=15% of a sleeve thickness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sleeve interposed between a strip and a reel when winding the strip by a reel equipment.

[0002]

2. Description of the Related Art Conventionally, in order to facilitate the winding of a strip by a reel or to prevent the occurrence of flaws such as reel marks at the tip of the strip, a rubber sleeve is attached to the reel to wind the strip. I'm taking it.

When the strip coil wound in such a manner is to be removed, if there is a contact portion between the coil and the sleeve, it is difficult to remove the coil due to the resistance of the contact portion. The reel is contracted so that there is no contact area on the. For example, when wound on a 24-inch coil, the reel and the sleeve are contracted from an outer diameter of φ610 mm to φ590 mm to form a gap of 10 mm on one side between the coil and the sleeve, and then the reel and the sleeve are extracted. And when pulling out the coil,
It is necessary to adjust the centers of the coil, sleeve, and reel so that the coil and sleeve do not come into contact with each other.

When a soft rubber material is used for the sleeve, the sleeve is stretched by repeatedly expanding and contracting the reel and the sleeve. Due to this extension, the sleeve cannot cope with the contraction of the reel, the centers of the coil and the sleeve change, and when the coil is pulled out, the coil and the sleeve come into contact with each other, or the sleeve comes out together with the coil.

For example, for winding into a 24-inch coil, for example, hardness Hs79 and tensile strength 170 kg / c
When a sleeve formed of rubber having m ² and an elongation of 410% was used, elongation of about 10 mm occurred in 3 months by repeatedly expanding and contracting the reel and the sleeve.

The sleeve made of a hard rubber eliminates the problem of elongation due to repeated expansion and contraction, but cracks on the inner surface due to repeated expansion and contraction and cracks on the outer surface due to the sharp end face of the coil. Occurs and the life of the sleeve is short.

Therefore, in order to solve the above-mentioned problems such as the elongation of the sleeve and the cracking of the inner surface, a rubber material made of a soft material is used for a portion contacting the strip and the reel, and a rubber material made of a hard material is used for a non-contact portion. Structural sleeves are conceivable.

Further, in Japanese Patent Publication No. 55-18169,
A sleeve has been proposed in which urethane rubber is embedded along the reel axial direction on the strip contact side of the sleeve formed of a material having appropriate flexibility and elasticity.

[0009]

In the multi-layered sleeve described above, since the layers have different elongations, the sleeve is distorted and eccentric, and the gap between the sleeve and the coil cannot be sufficiently secured, and the sleeve and the coil are pulled out. Sometimes come into contact.
Further, since the sleeve proposed in Japanese Patent Publication No. 55-18169 has uneven hardness on the surface of the sleeve, reel marks are generated at the boundary of the urethane rubber during winding.

In view of the above problems, it is an object of the present invention to provide a sleeve having a long life by eliminating elongation and cracking of the sleeve.

[0011]

As a result of intensive experiments, the present inventor has obtained the following findings. A rubber having a tensile strength of 200 kg / cm ² or more and an elongation of 400% or less has a small elongation due to repeated expansion and contraction. A rubber having a tensile strength of 200 kg / cm ² or less and an elongation of 300% or more is unlikely to cause cracks due to repeated expansion and contraction and flaws due to the coil end surface.

A sleeve made of these rubbers has a tensile strength of 200 kg / cm ² or more and an elongation of 400.
% Of rubber does not have a thickness of 50% or more of the sleeve thickness, the elongation of the sleeve becomes large. Also, the tensile strength is 2
00kg / cm ² or less, the elongation of 300% or more of rubber,
When the thickness is less than 10% of the sleeve thickness, there is no effect on cracks and flaws due to the coil end surface,
If the thickness exceeds%, the elongation becomes large.

Further, in order to bond these rubbers without impairing the properties thereof, the height of the uneven portion formed on the boundary surface should be 5% to 15% of the sleeve thickness, and the pitch should be ⅛ of the sleeve outer diameter. Must be 1 or less. If the height of the uneven portion is less than 5% of the sleeve thickness, the fixation is insufficient,
If it exceeds 15%, a reel mark due to the uneven portion is generated. Further, if the pitch is ⅛ or more of the outer diameter of the sleeve, the fixation is insufficient.

The sleeve of the present invention is made on the basis of the above-mentioned findings, and is made of a rubber material having a tensile strength of 200 kg / cm ² or more and an elongation of 400% or less. Tensile strength of 20 on the outer or inner circumference
An exterior material made of rubber having a elongation of 0 kg / cm ² or less and an elongation of 300% or more and having a thickness of 10% or more and 20% or less, and a height of 5% or more and 15% or less of the sleeve thickness, and 8 minutes of the sleeve outer diameter The concave and convex portions having a pitch of 1 or less were fitted as the boundary surface.

[0015]

The sleeve of the present invention has a tensile strength of 200 kg / c.
m ² or more, the outer circumference of more than 50% of the interior material of the sleeve thickness consisting elongation 400% or less of the rubber, the tensile strength 200k
g / cm ² or less and an elongation rate of 300% or more and a sheath material of 10% or more and 20% or less of the sleeve thickness, and a height of 5% or more and 15% or less of the sleeve thickness and 8% of the outer diameter of the sleeve.
Since the concave-convex portion having a pitch of one-half or less is fitted as the boundary surface, the interior material and the exterior material are firmly fixed, and the sleeve is unlikely to stretch or crack.

Further, a tensile strength of 200 is applied to the inner circumference of the interior material.
kg / cm ² or less, 10% or more and 20% or less of the outer package sleeve thickness consisting elongation 300% or more of rubber, with 5% to 15% or less of the height of the sleeve thickness, 8 minutes of sleeve outer diameter If the uneven portion having a pitch of 1 or less is fitted as the boundary surface, the occurrence of flaws on the reel can be prevented.

[0017]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a view showing a structure of a sleeve of the present invention corresponding to claim 1, FIG. 2 is a sectional view in an axial direction of FIG. 1,
FIG. 3 is a view showing the structure of the sleeve of the present invention corresponding to claim 2, and FIG. 4 is a sectional view in the axial direction of FIG.

1 is, for example, hardness Hs79 and tensile strength 170
Coil-side exterior material formed of rubber material having kg / cm ² and elongation rate of 410%, 2 has, for example, hardness Hs77 and tensile strength of 2
The interior material 3 made of a rubber material having a rate of 00 kg / cm ² and an elongation of 300%, for example, is a reel side exterior material made of the same rubber material as the coil side exterior material 1.

In FIGS. 1 and 2, the coil-side exterior material 1 has recesses 2 formed alternately on the inner periphery of the coil-side exterior material 1 and on the outer periphery of the interior material 2 at a pitch of, for example, 1/12 of the outer diameter of the sleeve.
3A and 3B, the coil side exterior material 1 and the reel side exterior material 3 are the inner and outer circumferences of the interior material 2. The convex portions 1a, 2b corresponding to the concave portions 2a, 2b and the convex portions 2c, 2d alternately formed at a pitch of 1/12 of the sleeve outer diameter, respectively.
3a and the recesses 1b and 3b are formed and fitted, and the coil-side exterior material 1 and the interior material 2 and the interior material 2 and the reel-side exterior material 3 are fixed at each boundary surface.

The sleeve of the present invention is constructed as described above, and includes the coil side exterior material 1 as shown in FIG.
Coil side exterior material 1 and reel side exterior material 3 as shown in FIG.
And the thicknesses S ₁ and S ₃ of the respective concave portions 1b and 3b are 10
mm, and the minimum wall thickness S ₂ of the interior material ₂ is 40 m
m, the height t of the protrusions 1a and 3a of the coil-side exterior material 1 and the reel-side exterior material 3 is 7 mm, and the pitch p is 50 mm. A sleeve having a thickness of 0.8 mm and a width of 1500 m is used.
When the coiling work of the cold-rolled steel strip of m was carried out for 3 months with the sleeve outer diameter φ610 mm, the length 2000 mm, and the reel expansion / contraction pressure of 100 kg / cm ² at the time of expansion, the elongation and flaw of the sleeve did not occur. .

[0021]

As described above, the sleeve of the present invention is integrally formed by using the coil-side exterior material or the coil-side exterior material and the reel-side exterior material and predetermined rubber materials having different properties for the interior material. In addition, the strip winding operation can be performed for a long period of time without causing the sleeve to stretch or to cause flaws.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a sleeve of the present invention corresponding to claim 1. FIG.

2 is a cross-sectional view in the axial direction of FIG.

FIG. 3 is a diagram showing a configuration of a sleeve of the present invention corresponding to claim 2.

4 is a sectional view in the axial direction of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 coil side exterior material 1a convex part 2 interior material 2a concave part 2b concave part 3 reel side exterior material 3a convex part

Claims (2)

[Claims] 1. A tensile strength of 200 kg / cm ² or more, the outer circumference of more than 50% of the interior material of the sleeve thickness consisting elongation 400% or less of the rubber, the tensile strength of 200 kg / cm ² or less, elongation of 300% The outer covering material made of rubber and having a thickness of 10% or more and 20% or less is used to form an uneven portion having a height of 5% or more and 15% or less of the sleeve thickness and a pitch of 1/8 or less of the outer diameter of the sleeve. A reel sleeve, which is fitted as a boundary surface. 2. A tensile strength of 200 kg / cm ² or more, the inner periphery of the sleeve thickness more than 50% of the interior material consisting of elongation 400% or less of the rubber, the tensile strength of 200 kg / cm ² or less, elongation 300 % Or more of the sleeve material having a sleeve thickness of 10% or more and 20% or less, and an uneven portion having a pitch of 5% or more and 15% or less of the sleeve thickness and a pitch of 1/8 or less of the outer diameter of the sleeve. A sleeve for a reel, which is fitted with a boundary surface.