JPH0242334Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a slave shaft drive device for a bending roll.

(Prior art) As is well known, bending rolls are composed of a pair of upper and lower rolls and a pair of side rolls on both sides of the rolls, and various plate materials are held between the upper and lower rollers. In this state, the rolls are rotated to move the plate material, and the side rolls are moved to curve the plate material into various shapes.

By the way, when one of the upper and lower rolls, for example, the upper roll, is rotated by a drive source, if the rotation of the upper roll is transmitted to the lower roller through the plate material and rotated as a result, the bearing of the lower roll It is known that slips occur between the upper roll and the upper surface of the plate material or between the lower roll and the lower surface of the plate material due to frictional resistance, etc., which reduces the feeding accuracy of the plate material. It is normal to actively apply driving force to the lower roll as well.

Conventionally, as means for applying driving force to the lower roll, the lower roll is rotated by a drive source separate from that of the upper roll, or the rotation of the upper roll is transmitted to the lower roll via a gear. However, in the former case, it is necessary to synchronize the rotation speeds of each drive source, and the adjustment is extremely troublesome. In the latter case, the distance between both rollers changes depending on the thickness of the plate material, so the distance between the rotation transmission gears that mesh with each other also changes, which changes the meshing points of the gears, resulting in a decrease in feeding accuracy. do.

(Problem to be solved by the invention) This invention allows the lower roll to rotate dependently with the rotation of the upper roll, and even in this case, even if the thickness of the plate varies, the feeding accuracy does not deteriorate. The purpose is to

(Means for solving the problem) This invention installs a lower roll that can be raised and lowered freely facing the upper roll that is rotated by a drive source, and connects a transmission roll that goes up and down together with the lower roll to the lower roll. The transmission roll is formed of an incompressible material into a drum shape with a bulge in the center, and the transmission roll is brought into local pressure contact with the upper roller as the lower roll moves up and down. It is characterized in that the rotation of the upper roller is transmitted to the lower roll via this transmission roll by this pressure contact.

(Example) An example of this invention will be described with reference to the drawings. 1 is an upper roll, and 2 is a lower roll. Both rolls and a pair of side rolloids (not shown) constitute a well-known bending roll. The upper roll 1 is rotatably supported by a fixed bearing 3 and is rotationally driven by a motor 4. A part of the upper roller 1 is provided with a non-processing area 7 that does not come into contact with the plate material 6 to be processed.

The lower roll 2 is rotatably supported by a bearing portion 8 which is movable up and down. This bearing part 8
The distance from the upper roller 1 is set according to the thickness of the plate material 6 by raising and lowering the plate material 6.

A transmission roll 9 is connected to the lower roll 2 via a joint (or clutch) 10. The transmission roll is rotatably supported by a bearing portion 11. This bearing portion 11 is designed to move up and down together with the lower roller 2.

The transmission roll 9 is made of an incompressible material such as urethane, and is shaped like a drum with a bulge in the center as shown in the figure. The circumferential surface thereof comes into contact with the upper roll 1 in the non-processing area 7 of the upper roll 1.

Although the structure for raising and lowering the lower roll 2 and the transmission roll 9 is arbitrary, in the example shown in the figure, racks 12 and 13 are fixedly provided integrally with the respective bearings 8 and 11, and pinions 14 and 15 that mesh with the racks are provided. The shaft is rotated by an air cylinder 17 (or motor) and a motor 16. Specifically, one end of the lever 18 is fixed to the shaft of the pinion, and the movable part 19 of the air cylinder 17 is connected to the other end. Further, the pinion 15 is rotated by the motor 16.

During processing, pinions 14 and 15 are rotated by an air cylinder 17 and a motor 16 according to the thickness of the plate material 6 and the radius of curvature to be formed. As a result, each bearing portion 8, 1 is connected via the rack 12, 13.
1 goes up and down. By this lifting and lowering, both rolls 1 and 2
The gap is such that the plate material 6 can pass through.

At this time, the distance between the axis of the transmission roll 9 and the upper roll 1 is also changed. Even if this change is made, since the transmission roll 9 is configured in a drum shape, the contact area between it and the upper roll 1 will only change depending on the thickness of the plate material 6 and the radius of curvature to be formed. , the pressurized contact state still continues. Therefore, even if the thickness of the plate material 6 changes, the rotation of the upper roll 1 is reliably transmitted to the transmission roll 9. Therefore, this transmission ensures that the lower roll 2 rotates.

In order to avoid slips between the upper roll 1 and the transmission roll 9, the part of the upper roll 1 in contact with the transmission roll 9 may be processed with fine irregularities to increase the friction coefficient. good. Further, a transmission roll made of the same shape and material as the transmission roll 9 may be installed on the upper roll 1, and the transmission roll 9 may be brought into contact with the transmission roll.

(Effects of the invention) As detailed above, according to this invention, unlike when the upper and lower rolls are rotated by each drive source, there is no need to synchronize the rotational speeds, and Unlike when the lower roll is rotated dependently, the feeding accuracy is no longer reduced due to the change in the distance between the two rollers depending on the thickness of the sheet material, and now it is possible to feed the sheet material with high precision at all times. It has a great effect.

[Brief explanation of the drawing]

Figure 1 is a front view showing an embodiment of this invention, Figure 2 is a front view showing an embodiment of this invention.
The figure is a front view of the transmission roll, and FIG. 3 is a partial side view. 1... Upper roll, 2... Lower roll, 6... Board material, 9...
transmission role.

Claims (1)

[Scope of utility model registration request] A lower roll is installed so as to be able to rise and fall freely facing an upper roll that is rotated by a drive source, and a transmission roll that moves up and down together with the lower roll is connected to the lower roll, and the transmission roll is configured in a drum shape, The transmission roll is pressed against a part of the upper roller as the lower roll rises, and the rotation of the upper roller is transmitted to the lower roll via the transmission roll. Slave shaft drive device for bending rolls.