JPH0126769B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention comprises a roller shaft that is curved under no load and has a tapered roller that forms a straight line along its length on a part of its outer periphery; The present invention relates to a curved shaft tapered roll suitable for use as a tension roll, an expander roll, etc. in a pinch section of a winding process.

BACKGROUND ART Conventionally, a rolled plate is cut into long strips, and the resulting plural long strips in a parallel state are continuously run as they are and introduced into a winding process. A known tension roll for forming pinch parts, which is used when winding strips separately while keeping them parallel, is a tension roll that has a crown-shaped roller with a barrel-shaped outer shape attached to a straight roller shaft. Ta.

The pinch portion is generally constructed by arranging a pair of crown-shaped rollers facing each other in pressure contact with each other. According to this, the feeding length of the long strip per rotation of the roller becomes substantially constant over the length direction of the roller.

Problems to be Solved by the Invention Incidentally, in a rolled plate, the thickness becomes thinner toward the end, and the thickness in the width direction is usually not uniform.

Therefore, when multiple long strips of different thicknesses are arranged in parallel and are wound up as they are through a pinch section with a constant feed length per revolution, there is a difference in the winding diameter. will occur. This difference in winding diameter not only causes winding defects such as deformation of the wound product, but also increases as the winding length increases, and ultimately It becomes impossible.

Currently, in order to prevent the problem of poor or impossible winding due to this difference in winding diameter, the actual situation is to correct the winding diameter by intervening paper or the like as winding progresses.

Means for Solving the Problems The present invention has succeeded in overcoming the above problems by developing a special roll configuration using a roller shaft that is curved under no load.

That is, the present invention consists of a roller shaft that is curved under no load, and a roller that rotates with respect to the roller shaft and whose outer circumference length gradually decreases from the center toward the ends in the length direction. has an external shape in a cross section perpendicular to the roller axis, and is formed so that when the roll is installed horizontally with the roller axis forming a catenary curve, the top of the roller outer periphery forms a horizontal line in the length direction. The present invention provides a curved shaft tapered roll characterized by:

Function: By rotatably providing a roller with a circular outer circumferential shape in a plane perpendicular to the roller shaft on a roller shaft that is curved under no load, the roller shaft can be suspended even though it is a tapered roller. When the roll is installed horizontally in a curved state, the top of the outer periphery of the roller can be in a horizontal state along the length of the roller. By arranging a pair of rolls facing each other using this horizontal state part, that is, the straight line part to form a pinch part, the rollers are in a state where the contact pressure is averaged across the width direction (length direction). In addition, based on the tapered shape in which the outer circumferential length of the roller gradually decreases from the center toward the ends in the longitudinal direction, the feed length per rotation can be increased at the center of the roller. It can be large and small at the ends. As a result, it becomes possible to send out a long strip or the like according to the thickness or winding diameter.

Embodiment FIG. 1 shows an embodiment of the curved shaft tapered roll of the present invention.

It consists of a roller shaft 1 which is curved under no load 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, and is formed in a tapered shape. That is, the outer circumferential length of the rubber lining roller 2 gradually decreases from the center toward the ends in the length direction. In addition to the tapered shape described above, the outer shape of the rubber lining roller 2 is circular in a cross section perpendicular to the roller shaft 1.
Further, when the roll is installed horizontally with the roller shaft 1 forming a catenary curve, the top of the outer periphery of the roller 2 forms a horizontal line along its length.

The production of such a rubber lining roller 2 is as follows:
For example, a roller with a thick rubber lining is installed on the roller shaft in a predetermined curved state, and then the roller is installed horizontally and the roller shaft is fixed.
This can be done by cutting and forming the rubber lining part using a cutter or the like horizontally fixed at a predetermined distance while rotating a roller.

In the figure, 4 is a sleeve, 5 is a bobbin, 7 is an end flange, 7 is a presser flange, 8 is a gear for transmitting rotational force to other rollers, 9 is a sprocket for receiving rotational force from a drive source, 10 is a set sleeve.

The roller shaft used in the present invention is curved under no load. The degree of curvature is
It is sufficient that the roller provided on the roller shaft via a bearing or the like as necessary is within a range in which it can freely rotate relative to the roller shaft. Incidentally, the radius of curvature as the degree of curvature of the roller shaft 1 in the example is about 36 m. Note that its diameter is approximately 4 cm.

The roller in the present invention has a special outer shape in addition to its tapered shape. The formation can be achieved by, for example, using the above-described manufacturing method or the like, and by providing the roller so that the cross-sectional outline of the roller in the direction perpendicular to the roller axis is a perfect circle. The ratio of the outer circumferential length of the center part to the end part in the longitudinal direction of the roller is determined by the degree of curvature of the roller axis. Incidentally, the outer circumferential length of the roller in the example is about 39 cm at the center and about 36 cm at the ends.

In the embodiment, a rubber-lined roller was used to provide tolerance for thickness variations and to obtain a desirable contact pressure state, but the present invention is not limited to this.

The roll of the present invention is preferably used, for example, as a tension roll for forming a pinch section, a feed roll in an accumulator, or an expander roll. Examples of its application include, but are not limited to, sheet-like materials such as rolled plates, foils, cloth, paper, and plastic films.

When constructing the pinch portion described above, the pair of rolls are supported and arranged via bearings 11 etc. so that the curves of the roller shafts 1, 1 are in a state of protruding outward from each other as shown in FIG. . Due to this arrangement, a straight line is formed in the roller opposing portion, and a contact pressure state that is averaged over the length of the roller is formed. As a result, it is possible to achieve feeding substantially in accordance with the outer peripheral length of the roller without being substantially affected by differences in the thickness of sheet-like objects such as elongated strips formed by cutting rolled plates or the like. When winding multiple strips of different thickness in parallel, the common method is to feed the thicker strips to the center of the roller and the smaller strips to the ends. However, in the present invention, a method may be adopted in which a material having a small thickness is supplied to the center portion of the roller and a material having a large thickness to the end portions of the roller. In the former case, in response to the difference in winding diameter based on the difference in thickness,
In other words, a long strip or the like is fed out in accordance with the winding length per rotation of the winding roller, and in the latter case, the winding diameter is averaged, that is, there are few thick ones. The thinner the material, the more it will be sent out.

Effects of the Invention According to the curved shaft tapering type roll of the present invention, since the roller shaft is curved under no load, the roller forms a straight line extending in the length direction on a part of the outer periphery even though it is tapered. I was able to
The pair of rolls can be disposed facing each other in a state where the contact pressure of the roller facing portions is averaged over the length direction. As a result, under this arrangement, when multiple sheets of different thicknesses are wound in parallel based on the feeding characteristics of the tapered rollers, there is no winding failure or unwinding. Moreover, the film can be wound in good condition without requiring correction of the winding diameter.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a part (right half) of an embodiment of a curved shaft tapered roll of the present invention, and FIG. 2 is a schematic side view of a pinch portion constructed using a pair of the rolls. 1: Roller shaft curved under no load, 2: Tapered roller, 3: Bearing, 8: Gear for transmitting rotational driving force, 9: Sprocket for receiving rotational driving force.

Claims (1)

[Claims] 1. Consists of a roller shaft that is curved under no load, and a roller that rotates with respect to the roller shaft and whose outer circumference length gradually decreases from the center toward the ends in the length direction, The outer shape of the roller is circular in a cross section perpendicular to the roller axis, and when the roller is installed horizontally with the roller axis forming a catenary curve, the top of the outer circumference of the roller forms a horizontal line in the length direction. A tapered 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 or a tension roll for forming a pinch section.