JP3336670B2 - Meandering correction method for continuous transport strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for continuously transporting a band-shaped material such as a metal strip while supporting it with a roll.
The present invention relates to an improvement in a meandering correction method for appropriately correcting the meandering of the strip.

[0002]

2. Description of the Related Art When a belt-like material such as a metal strip supported and transported by a roll meanders, it comes into contact with surrounding structures and equipment and is damaged or broken. Therefore, it is necessary to appropriately correct the meandering. Conventionally, as such a meandering correction method for a strip-shaped material, generally, an amount of meandering of the strip-shaped material is detected by an optical sensor installed downstream of the steering roll, and the steering roll is operated in an arc shape according to the detected amount. I have to. For example, when a metal strip that has been subjected to continuous annealing in a vertical heat treatment furnace is continuously transported while changing its direction from a vertical direction to a horizontal direction by a steering roll attached to the furnace top, the meandering amount of the metal strip is detected by the optical sensor. The meandering is corrected by driving the actuator according to the detected amount and tilting the steering roll in an arc shape.

[0003]

However, the conventional meandering correction method as described above merely tilts the steering roll in an arc shape in accordance with the amount of meandering on the downstream side. Not only is it not corrected, but in some cases, meandering is promoted, which may cause accidents such as contact, scratching, and breakage.

Accordingly, the present invention is to make it possible to more reliably correct the meandering of the continuous transport strip so that the strip is not damaged or broken.

[0005]

For this purpose, a meandering correction method for a continuous conveyance strip according to the present invention comprises a first actuator for moving a steering roll in an axial direction and a second actuator for tilting the steering roll in an arc shape. And a sensor for detecting the amount of meandering is provided on the upstream and downstream sides of a strip such as a metal strip supported and transported by the steering roll, respectively, and the meandering amount detected by the sensor on the downstream side is provided. Is corrected by driving the first actuator, and the meandering amount detected by the upstream sensor is corrected by driving the second actuator.

In addition, a method for correcting meandering of a continuous conveyance strip according to the present invention includes a first actuator for moving a steering roll forward and backward in an axial direction and a second actuator for tilting the steering roll in an arc shape. A sensor for detecting the amount of meandering is provided downstream of a strip such as a metal strip supported and transported by a steering roll, and the meandering amount detected by the sensor is corrected by driving a first actuator. The present invention is characterized in that a required tilt amount is calculated from a meandering amount detected by the sensor via a calculator and the second actuator is driven.

[0007]

By correcting the meandering of the belt-like material by moving the steering roll forward and backward and tilting, a quicker and more reliable correction operation can be performed.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a strip 2 extracted right above a vertical furnace 1 is wound around a steering roll 3 to turn in the horizontal direction, and the strip 2 is wound around a guide roll 4 to turn downward. 1 shows a continuous conveyance device that is in use.

FIG. 2 is a schematic view of the steering roll 3 as viewed obliquely from the upper right. In FIG. The bearings 5 and 5 are supported so as to be able to tilt along arcuate guide rails 8 provided on the slide plate 7. Reference numeral 9 denotes a slide plate 7 for tilting the steering roll 3 in an arc along the guide rails 8,8.
This is a second actuator such as a servomotor type linear motion mechanism provided above. Reference numeral 10 denotes a first actuator provided on the inclined substrate 15 for moving the steering roll 3 in the axial direction and moving the slide plate 7 in the axial direction.

Reference numeral 11 denotes a sensor provided on the upstream side of the steering roll 3 near the extraction port of the vertical furnace 1, and 12 denotes a sensor provided on the downstream side of the steering roll 3.
The sensors 11 and 12 are configured such that a plurality of light emitters and receivers are opposed to side edges of the strip 2 so that the meandering amount of the strip 2 can be electrically detected.

The meandering amounts detected by the sensors 11 and 12 are input to a control device 13. The control device 13 operates the actuator 10 in accordance with the meandering amount detected by the sensor 12 on the downstream side to cause the steering roll 3 to advance and retreat in the axial direction via the slide plate 7 to wind around the steering roll 3. The strip 2 is moved in parallel in the width direction to correct the meandering (lateral displacement) of the strip 2. The correction result is re-measured by the sensor 12 and fed back to the actuator 10 via the control device 13.

If the upstream side of the belt-shaped material 2 is inclined and meandered by the correcting operation by the axial movement of the steering roll 3, the meandering amount is detected by the sensor 11, and the meandering amount is input to the control device 13 and controlled. The device 13 is a sensor 11
The steering roll 3 is tilted to operate the actuator 9 in accordance with the amount of meandering detected by the control to correct the meandering. Thus, the meandering of the strip 2 on the upstream side of the steering roll 3 is constantly detected by the sensor 11 and corrected by being fed back to the actuator 9 via the control device 13.

Although the above embodiment is an example in which sensors are provided on the upstream side and the downstream side, respectively, as shown in FIG. 3, the sensor 12 is provided only on the downstream side, The actuator 10 is actuated by the meandering amount, and the required tilting amount of the steering roll 3 accompanying the correction is calculated by passing through the calculator 14 from the meandering amount detected by the downstream sensor 12 to calculate the actuator 9. The arithmetic expression of the arithmetic unit 14 may include the inclination of the strip 2 and the steering roll 3, the steering roll 3 and the guide roll 4.
Is determined individually for each device by taking into account the distance and the like.

[0014]

As described above, the meandering correction method for the continuous conveyance strip according to the present invention corrects the meandering amount detected by the downstream sensor by advancing and retreating the steering roll in the axial direction to reduce the meandering on the upstream side. Since the correction is made by the tilting of the steering roll in an arc shape, the meandering of the band-shaped material such as the metal strip can be reliably corrected, and the trouble such as breakage can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a continuous strip-shaped material conveying apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the steering roll of FIG. 1;

FIG. 3 is a front view of a steering roll showing another embodiment of the present invention.

[Explanation of symbols]

 2 strip material 3 steering roll 5,5 bearing 7 slide plate 9 actuator 10 actuator 11 sensor 12 sensor 13 control device 14 arithmetic unit

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 23/032 B65H 43/08 C21D 9/68

Claims (2)

(57) [Claims] 1. A belt-like material such as a metal strip supported and transported by the steering roll, comprising a first actuator for moving the steering roll forward and backward in the axial direction and a second actuator for tilting the steering roll in an arc shape. A sensor for detecting the amount of meandering is provided on the upstream side and the downstream side, respectively, and the meandering amount detected by the sensor on the downstream side is corrected by driving the first actuator. A meandering correction method for a continuous conveyance strip, wherein the detected meandering amount is corrected by driving a second actuator. A first actuator for moving the steering roll forward and backward in the axial direction and a second actuator for tilting the steering roll in an arc shape; A sensor for detecting the amount of meandering is provided on the downstream side, the meandering amount detected by the sensor is corrected by driving the first actuator, and an arithmetic unit is calculated from the meandering amount detected by the sensor. A meandering amount of the continuous conveyance strip is calculated by calculating a required amount of tilting through the second actuator and driving the second actuator.