JP2555285Y2 - Leveler backup roll unit - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll unit for backing up a driving roll in a leveler for straightening a steel plate or the like.

[0002]

2. Description of the Related Art A leveler is used to straighten a sheet material wound in a coil shape into a smooth state, or to apply a Luda line in a drawing process (for a cold-worked plate, a drawing process is performed without adding a skin pass after annealing. When this is done, a line appears on the plate. This is called the Lüda line.) In order to prevent the occurrence of the line, it is used when the plate material is previously cold-worked. As an example, FIG. 2 shows a leveler of a type in which a large cold work is applied by a bending roll A and then corrected by a correction roll F. The rolls are arranged so as to be staggered alternately in the upper and lower numbers, and are arranged in order of a guide roll C, a drive roll E, and a straightening roll F from the entrance side.
The degree of the difference between the rolls is greater on the entrance side than on the exit side. When the plate material B is bitten by the driving roll E, the bending roll A is lifted. The plate material B is largely bent by several rolls on the entrance side and undergoes a large cold work on its surface. Then, it is sent to the straightening roll F by the driving roll E and undergoes straightening.

In general, the roll diameter of the leveler is properly used depending on the thickness of the plate material. In the case of a thick plate, a large-diameter roll is used, and in the case of a thin plate, a small-diameter roll is used.
When a small-diameter roll is used, the drive roll E is reinforced by a backup roll D or the like. As this backup roll D, for example, as shown in FIG. 3, a cylindrical roll main body 11, a shaft body 12 inserted through the roll main body 11, interposed between the roll main body 11 and the shaft body 12, There is a unit in which a pair of rolling bearings 13 rotatably supported on the shaft body 12 and a sealing device 15 for sealing the inside of the roll body 11 are integrally assembled.

[0004]

The roll unit having the above-mentioned structure uses a sealed deep groove ball bearing as a rolling bearing, so that it has relatively small rigidity and load capacity, and relatively light load such as straightening an aluminum plate. It is only used for levelers that work. On the other hand, as means for increasing rigidity and load capacity, it is also conceivable to increase the diameter of the bearing or to change the bearing type to a roller bearing, but the roll diameter is increased according to the former, and the rotational torque is increased according to the latter. Increase is inevitable.

Accordingly, an object of the present invention is to increase the rigidity and load capacity of a backup roll unit without increasing the roll diameter and rotational torque.

[0006]

SUMMARY OF THE INVENTION A backup roll unit for a leveler according to the present invention includes a cylindrical roll body for backing up a drive roll of a leveler, a shaft inserted through an inner diameter of the roll body, and a roll. One having a plurality of balls rotatably arranged between a double row of outer raceways provided on an inner peripheral surface of a main body and a double row of inner raceways provided on an outer peripheral surface of the shaft body. It is.

[0007]

By providing the raceway surfaces on the inner peripheral surface of the roll body and the outer peripheral surface of the shaft body, the diameter or the number of balls arranged on the raceway surface can be increased.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the roll unit of this embodiment is provided on a cylindrical roll body 1, a shaft 2 inserted into the inner diameter of the roll body 1, and an inner peripheral surface of the roll body 1. A plurality of balls 3 rotatably arranged between the provided double-row outer raceway surface 1a and the double-row inner raceway surface 2a provided on the outer peripheral surface of the shaft body 2, and both ends of the roll body 1. And a sealing device 5 for sealing the inside of the roll body 1.

The roll body 1 is pressed against a drive roll of a leveler (not shown) and rotates with the drive roll. The shaft 2 does not rotate. The ball 3 rotatably supports the roll body 1 with respect to the shaft body 2.

A sealing device 5 is fitted to the step of the shaft body 2 and fixed by a retaining ring 5a, and a slinger fitted to the inner diameter of the roll body 1 and fixed by a retaining ring 5c. 5d, an elastic seal 5e fitted on the outer diameter of the seal seat 5b and slidingly contacting the sealing surface of the slinger 5d, and an O-ring 5f mounted on the outer diameter of the slinger 5b. Note that various configurations of the sealing device are conceivable, and the configuration is not limited to the configuration illustrated in this embodiment.

In this roll unit, the inner and outer raceway surfaces 1a and 2a on which the ball 3 rolls are formed by the roll body 1 and the shaft 2
Therefore, the diameter of the ball 3 can be increased without increasing the outer diameter of the roll body 1, or the number of balls 3 can be increased. Therefore, the roll unit has higher rigidity and load capacity than the conventional roll unit shown in FIG. 3, and can be used for a leveler on which a relatively large load such as straightening of a steel plate acts.

[0013]

[Effects of the Invention] As described above, according to the present invention,
Since the inner and outer raceways on which the balls are arranged are formed directly on the roll body and the shaft body, the diameter of the balls can be increased without increasing the outer diameter of the roll body 1, or the number of arrangements can be increased. Can be increased, so that the roll diameter and the rotational torque do not increase,
It is possible to increase the rigidity and load capacity of the roll unit. Therefore, the present invention contributes to improving the life of the roll unit and improving the quality of the rolled sheet material.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a leveler.

FIG. 3 is a sectional view showing a conventional roll unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll main body 1a Outer raceway surface 2 Shaft body 2a Inner raceway surface 3 Ball

Claims (1)

(57) [Scope of request for utility model registration] 1. A cylindrical roll main body for backing up a drive roll of a leveler, a shaft inserted through an inner diameter portion of the roll main body, and a double row of outer raceways provided on an inner peripheral surface of the roll main body. A backup roll unit for a leveler, comprising: a plurality of balls rotatably disposed between a plurality of rows of inner raceways provided on an outer peripheral surface of the shaft.