JPH025655B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is based on a generally crown-shaped roller in which the upper part of the outer periphery also forms a catenary curve in the length direction, and the present invention is based on a generally crown-shaped roller in which the upper part of the outer periphery also forms a catenary curve in the length direction. This invention relates to a crown-shaped roll with a curved shaft that prevents uneven permanent strain from occurring in objects passing through it.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, as a roll for forming an accumulator, one in which a crown-shaped roller having a barrel-shaped outer shape is provided on a linear roller shaft has been known.
The crown-shaped roller has the advantage that the passing material is maintained in the center of the roller due to its barrel shape and the large outer circumferential length of the central portion, thereby preventing the passing material from deviating from the roll.

However, on the other hand, there was a problem in that the objects passing through were elongated unevenly due to the shape of the barrel, and this caused uneven permanent strain in the objects passing through.

This problem of permanent distortion occurs when a large number of rolls are passed through, such as in an accumulator, which is generally constructed using about 10 to 100 rolls, or when a material such as metal foil or plastic sheet is used. This is particularly noticeable in the case of items that tend to undergo permanent deformation even with a weak force. When uneven permanent strain occurs, the yield of the product decreases, and if the degree of permanent strain is large, the entire product cannot be put to practical use and must be discarded. becomes.

Means for Solving the Problems The present invention successfully overcomes the above problems by developing a special form of curved shaft crown roll.

That is, the present invention consists of a gently curved roller shaft and a roller that rotates freely relative to the roller shaft and has a generally crown-shaped outer shape. When the roll is installed in a state where the curve gradually decreases and the curved roller axis forms a vertical elevation projection or a catenary curve, the upper part of the roller outer circumference forms a catenary curve in the length direction of the roller. The present invention provides a curved shaft crown-shaped roll characterized by the following.

Effect When a roll is installed in such a state that the gently curved roller shaft and the vertical elevation projection of this roller shaft form a catenary curve, the upper part of the roller outer circumference (the upper half or part of the roller) will move in the length direction. By configuring the roll with a roughly crown-shaped roller that crosses to form a catenary curve, the outer surface of the roller in the roll gradually changes from a concave part to a straight part and from a straight part to a convex part. be able to. As a result, it is possible to control the wrapping length in the width direction of the contact area of the object passing through the roll by using the recess at the top of the roller, and the object coming into contact with the roll in a state where the stretching force is evened out. This makes it possible to suppress or prevent uneven permanent strain from occurring in the passing object, and also to maintain the passing object toward the center of the roller based on the approximate crown shape of the object as it passes from the roll. It is also possible to prevent objects from deviating.

Embodiment The figure shows an embodiment of the curved shaft crown type roll of the present invention.

It consists of a gently curved roller shaft 1 and a rubber-lined roller 2. The rubber lining roller 2 is rotatably provided with respect to the roller shaft 1 via a bearing 3. Further, the rubber lining roller 2 has a generally crown shape. That is, the outer shape of the rubber lining roller 2 is such that the outer circumferential length of the roller gradually decreases from the center to the end in the longitudinal direction of the roller, and the outer diameter of the roller in a cross section perpendicular to the roller axis also decreases. When the roll is circular and the vertical elevation projection of the curved roller axis forms a catenary curve, the upper part of the roller outer circumference forms a catenary curve in the length direction of the roller (saddle type). shape).

The production of such a rubber lining roller 2 is as follows:
For example, a roller with a thick rubber lining in advance is rotatably mounted on a roller shaft in a predetermined curved state, and then the roller shaft is installed horizontally so that it forms a catenary curve based on vertical elevation projection. Then, the roller shaft is fixed, and in this state, as the roller rotates, a predetermined portion of the rubber lining portion, which is sequentially fed out as the upper part of the roller, is cut using a cutter or the like provided at a predetermined distance on the upper side of the roller. , at least the top of the roller that is formed sequentially as the roller rotates forms a catenary curve in the length direction, and the outer circumferential length of the roller gradually increases from the center to the end in the length direction of the roller. This can be done by molding it into a decreasing state.

In the figure, 4 is a sleeve, 5 is a bobbin, 6 is an end flange, 7 is a holding flange, 8 is a gear for receiving driving force to assist rotation, and 9 is a set sleeve.

The roller shaft of the roll of the present invention is gently curved. The degree of curvature is generally 10 to 80 m based on the radius of curvature, but is not limited to this, and is within the range in which the roller installed on the roller shaft via a bearing etc. as necessary can freely rotate relative to the roller shaft. It is good if there is. Further, there is no particular limitation on the diameter of the roller shaft. Generally, the length is 2 to 25 cm, but it can be determined as appropriate depending on conditions such as roll length. By the way, the length of the roll in the example is 1.2m, and the radius of curvature of the roller shaft 1 is approximately
It is 39m. Further, the diameter of the roller shaft is approximately 4 cm.

The roller in the roll of the present invention has a special outer shape. For example, by using the manufacturing method described above, the appearance is such that a crown-shaped roller is rotatably provided on a linear roller shaft via a bearing as necessary, and the roller shaft is aligned with the roller part. In other words, the roller is bent in such a way that the center of the arc formed by the outer peripheral line on the inner diameter side of the roller in the bending plane is on the same side as the center of the arc formed by the roller shaft on the inner diameter side. This can be obtained by making the center of the roller recessed relative to the straight line connecting both ends on the inner diameter side. As a result, the roller has the above-mentioned concave part as a suspended curved part at the upper part of the roller, a convex part as the lower part of the roller in that state, and a straight part formed between these parts in the appearance of the roller. Can be done.

The dimensions of the roller are based on a roll length of 120 cm, the maximum outer circumference of the roller is 15 to 250 cm at the center, the outer circumference at the end is 14 to 245 cm, and the maximum catenary curve at the top of the roller is The roller surface at the center of the roller when the roller shows a concave state,
Generally, the gap d between the roller and the straight line connecting both ends of the roller is 0.1 to 5 mm, but it is not limited to this. Incidentally, the outer circumferential length of the roller in the example is about 40 cm at the center, about 36 cm at the ends, and the gap d is about 1 mm.

In the embodiment, a rubber-lined roller was used in order to provide tolerance for variations in thickness, etc., and to obtain a desired contact pressure state with the passing object, but the present invention is not limited to this. Others include customary metal rollers;
In addition to plastic rollers, rubber rollers, etc., cloth covered rollers, sponge covered rollers, etc. can be exemplified. Further, in the present invention, the roller may have a groove on its outer periphery for an appropriate purpose, for example, for draining water.

The roll of the present invention is preferably used as, for example, an accumulator forming roll, an expander roll, a tension roll, and the like. Applicable objects include metal foil, plastic film,
Examples include, but are not limited to, sheet-like materials such as rolled plates, cloth, and paper.

When configuring the above-mentioned accumulator,
Each roll utilizes an appropriate curvature in its external shape that gradually changes to uniformize the stretching force on the passing object, and if necessary, use a bearing etc. to move the roller axis at an appropriate angle and as desired. This is achieved by supporting and arranging the roller shaft so that its angle can be changed. This effectively prevents uneven permanent strain from occurring in the object passing through.

Note that the uniformity of the stretching force on the object passing through the roll varies depending on the contact area of the object with the roll, the contact condition such as the contact angle, and the passing conditions such as the passing speed. This is achieved by making the contact length uniform.

Effects of the Invention According to the present invention, since the roller is provided with a roughly crown-shaped roller on a curved shaft with a concave portion formed in the upper part of the roller, the passing object is directed to the center of the roller based on the crown shape of the roller. Despite having the function of preventing the passing material from deviating from the rolls by maintaining the material at a constant temperature, the passing material can be brought into contact with the rolls so that the stretching force by the rolls is evened out. As a result, it is possible to effectively prevent uneven permanent strain from occurring in the object passing through.

[Brief explanation of drawings]

The figure is a partial cross-sectional view of a curved shaft crown-shaped roll according to an embodiment of the present invention. 1: Roller shaft, 2: Roughly crown-shaped roller,
3: Bearing.

Claims (1)

[Claims] 1. Consists of a gently curved roller shaft and a roller whose outer shape is approximately crown-shaped and which rotates freely with respect to the roller shaft, and whose outer circumference increases from the center to the end in the length direction of the roller. When the roll is installed in a state where the length gradually decreases and the vertical elevation projection of the curved roller axis forms a catenary curve, the upper part of the roller outer circumference forms a catenary curve in the length direction of the roller. A crown-shaped roll with a curved shaft. 2. The roll according to claim 1, wherein the roller is a rubber-lined roller. 3. The roll according to claim 1, which is used as an expander roll, tension roll, or roll for forming an accumulator.