JPH0531467A - Screw down device - Google Patents

Abstract

PURPOSE:To stabilize the detergency on the surface of a band-shaped body by pressing a brush roll at all times to the band-shaped body under the same pressure. CONSTITUTION:This device has an electric motor for driving which drives the brush roll 2 on the surface of a steel strip 1, a weight 15 which applies a prescribed pressure to the brush roll 2 driven by the electric motor for driving and an oil damper device 16 which prevents the vertical movement of the brush roll 2 screwed down by the weight 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling down device that keeps down the rolling down force of a brush roll for cleaning the surface of a strip.

[0002]

2. Description of the Related Art Conventionally, as a device for cleaning the surface of a strip, there has been one shown in FIGS. This cleaning device
As shown in FIG. 3, a brush roll 2 that cleans the surface of the strip (steel strip) 1, a drive motor 3 that drives the brush roll 2 to rotate through a speed reducer 4, and a drive motor 3 are used for driving. A brush roll pressure-down position adjusting electric motor 5 and a speed reducer 6 for adjusting the vertical position of the brush roll 2 are provided.
While adjusting the vertical position of the brush roll 2 by the adjusting electric motor 5 and the speed reducer 6 for adjusting the rolling position of the brush roll 2, the brush roll 2 is pressed against the surface of the steel strip 1 while the oil and rust on the surface are machined. Is configured to be removed.

As shown in FIG. 4, the drive motor 3 is connected to a power source 8 via a contactor 7,
The current supplied to the driving electric motor 3 is transformed by the ammeter converter 9, and the output current of the converter 9 is changed by the ammeter 10.
It is supposed to be directed by. Further, the adjusting electric motor 5 is connected to a power source 13 via contactors 11 and 12 arranged in parallel. Further, the driving electric motor 3 and the adjusting electric motor 5 are respectively connected to a reduction position control device 14, and the reduction position control device 14 sets the current I _s of the brush roll and the current output from the ammeter converter 9. It operates on the basis of I _f , and adjusts the position of the brush roll 2 by driving the adjusting electric motor 5 by turning the contactors 11 and 12 on and off to drive the adjusting electric motor 5. As shown in FIG. 5, the rolling-down position control device 14 includes a subtractor 14A, a dead zone 14B, and a comparator 14C, and the subtractor 14A subtracts the set current I _s and the output current _If from the subtraction result. There is inputted to the dead zone 14B, if I approximate each current I _s, I _f, and stops the control, comparing both current I _s, I _f the comparator 14C if I have deviations above the dead zone 14B occurs, It is configured to output a signal that makes a determination and causes the adjustment electric motor 5 to rotate normally or reversely. Then, the contactors 11 and 12 are turned on based on the output signal from the pressure reduction position control device 14, and the difference between the two currents I _s and I _f is adjusted via the adjusting motor 5 until the difference between the currents I _s and I _f falls within the dead zone value. The vertical position is adjusted.

[0004]

The conventional adjusting device for adjusting the vertical position of the brush roll 2 in the cleaning device does not control the pressure reduction position in the dead zone, so that the processing unevenness of the brush roll 2 occurs in the dead zone. Further, since the brush roll 2 is pressed down by the forward / reverse ON / OFF control of the adjusting motor 5, there is a problem that the dead zone cannot be reduced and the pressing force of the brush roll 2 cannot be finely controlled. ..

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a pressure reducing device capable of stabilizing the cleaning force on the surface of a strip by constantly pressing the brush roll against the strip with the same pressure. Has a purpose.

[0006]

The rolling down device of the present invention comprises a driving device for driving a brush roll on the surface of a band, a weight for applying a predetermined pressure to the brush roll driven by the driving device, and a weight. And an oil damper device for preventing the pressed brush roll from moving up and down.

[0007]

According to the present invention, while the brush roll is rotationally driven by the driving device, the rolling force of the weight is appropriately adjusted by the oil damper to prevent the brush roll from moving up and down so that the brush roll is kept constant. A rolling force can be applied.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Based on the embodiments shown in FIGS. 1 and 2, the same or corresponding parts as in the conventional one will be designated by the same reference numerals, and the characteristics of the present invention will be mainly described. In each drawing, FIG. 1 is a configuration diagram showing an embodiment of the reduction device of the present invention, and FIG. 2 is an equivalent diagram showing the configuration of the reduction device shown in FIG.

As shown in FIG. 1 and FIG. 2, the rolling-down device of this embodiment has a brush roll 2 arranged on the back side thereof so as to come into contact with the steel strip 1, and a drive for rotating the brush roll 2. Device (not shown, drive motor 3 in FIG. 3)
Corresponding to the device), a weight 15 for applying a predetermined pressure to the brush roll 2 driven by a drive device, and an oil damper connected to the end of the brush roll 2 pressed down by the weight 15 and preventing its vertical movement. And a device 16.

The pressure reducing device further includes an arm 17 which supports the weight 15 at one end and the other end of which is connected to the end of the brush roll 2, and a fulcrum 18 which pivotally supports the arm 17, and the weight 15 Is configured to be moved on the arm 17 so that the pressure applied to the brush roll 2 can be adjusted. Incidentally, 19 is a backup roll.

The pressure F applied to the brush roll 2 is determined by the relationship of F = W × (l ₁ / l ₂ ) depending on the weight W of the weight 15 and the distance l ₁ from the fulcrum 18 to the weight 15. Once the distance l ₁ is set, a constant pressure can be constantly applied to the brush roll 2 thereafter. However, l ₂ is the distance from the fulcrum 18 to the axis of the brush roll 2.

The operation will be described below. Once the pressure F applied to the brush roll 2 is once set by the distance of the weight 15 from the fulcrum 18, a constant set pressure is always applied to the brush roll 2 and the pressure is applied. The surface of the steel strip 1 can be cleaned. Scratches on the steel strip 1 during cleaning
When the rolling force of the brush roll 2 is likely to fluctuate due to the unevenness of the welded portion, the oil damper device 16 works to suppress the sudden vertical movement of the brush roll 2 and prevent the uneven processing by the brush rolls 2 around them. Therefore, stable surface cleaning can always be performed.

In the above embodiment, only the case of cleaning the steel strip 1 has been described, but it goes without saying that the present invention can also be applied to strips of nonmetal, paper, plastic, etc. other than steel strip. Absent. In short, a drive device that drives the brush roll on the surface of the strip, a weight that applies a predetermined pressure to the brush roll that is driven by the drive device, and an oil damper that prevents the brush roll that is pressed down by the weight from moving up and down. Any reduction device including the device is included in the present invention.

[0014]

As described above, according to the present invention, it is possible to provide a reduction device capable of stabilizing the cleaning force on the surface of a strip by constantly pressing the brush roll against the strip with the same pressure.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a reduction device of the present invention.

FIG. 2 is an equivalent diagram showing the configuration of the pressure reduction device shown in FIG.

FIG. 3 is a configuration diagram showing an apparatus using a conventional reduction adjusting device.

FIG. 4 is a circuit diagram of the device shown in FIG.

5 is a block diagram showing a configuration of a rolling position control device shown in FIG.

[Explanation of symbols]

 1 Steel Strip (Strip) 2 Brush Roll 3 Drive Motor (Drive Device) 15 Weight 16 Oil Damper Device

Claims (1)

Claim: What is claimed is: 1. A drive device for driving a brush roll on the surface of a strip, a weight for applying a predetermined pressure to the brush roll driven by the drive device, and a brush roll pressed down by the weight. An oil damper device for preventing the vertical movement of the pressure reducing device.