JPH04365745A - Meander preventing device for looper device - Google Patents

Abstract

PURPOSE:To attain very high accurate correction of a meander by detecting the meander of a strip on a looper car, and controlling a roll so as to immediately correct this meander. CONSTITUTION:A detecting device 11 for detecting a meander of a metal strip 3 is provided on a looper car of a looper device. In this detecting device 11, light emitting and receiving parts 12, 13 of a phototube are arranged with the metal strip 3 interposed relating to upper and lower surfaces thereof to detect an amount of intercepting light by the metal strip 3 and the meander. This detecting device 11 is provided in a position in the vicinity of a roll 21. In an oscillating device 30, a rod is connected to a point end of a flange of a frame 23 in squared shape with one side open to constitute a main unit of a hydraulic cylinder device mounted to the looper car. This hydraulic cylinder device is actuated so as to negate the meander of the metal strip 3 by a signal from the meander detecting device 11. A control unit for the above action is mounted onto the looper car. In this way, high accurate meander correction can be attained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for preventing meandering of a metal strip during processes such as plating, pickling, and continuous annealing.

0002

[Prior Art] When performing various treatments such as plating, pickling, continuous annealing, etc. by uncoiling and running a metal strip,
Meandering of the metal strip shall be prevented. To this end, techniques have been developed in which various meandering detection devices are provided on the running path of the metal strip and the rollers are operated to prevent meandering.

However, in the metal strip looper device, since the looper car runs in the longitudinal direction of the metal strip, it has not been possible to provide a meandering detection device in the running path.

0004

The meandering that occurs in the looper car often causes large meandering in the vicinity of the bridle roll, which is further away from the looper car, resulting in problems such as pinching and squeezing of the metal strip. In addition, the rolls on the looper car have shorter body lengths and lower unit tensions than other rolls, so particularly wide metal strips tend to protrude from the rolls or get squeezed. Furthermore, due to its original function, the looper car is constantly moving, and it is not appropriate to use the roll of the looper car to correct meandering from the viewpoints of operability, reliability, maintenance, power supply, cooling, etc. It was thought that there was no such thing.

[0005] Contrary to such conventional thinking, the present inventors
The inventors have discovered that extremely accurate meandering correction is possible by detecting the meandering of the strip on the looper car and controlling the rolls to immediately correct the meandering, thereby completing the present invention. An object of the present invention is to provide a novel meandering prevention device provided in a looper device.

[0006]

[Means for Solving the Problems] The present invention is a meandering prevention device for a looper device constructed by the following technical means based on the above-mentioned novel findings. That is, the present invention provides (a)
A detection device for detecting meandering of the metal strip is provided on the looper car of the looper device. (b) Attach the roll on the looper car to the looper car so that it can swing freely. (c) A swinging device is provided for swinging the roll in a direction to cancel the meandering of the strip based on the signal from the detection device.

[0007]

[Operation] Since the device of the present invention is constructed as described above, it can detect the meandering of the metal strip on the looper car at that position no matter where the looper car is or even when it is moving, and immediately correct the meandering of the metal strip on the looper car. Add motion. Therefore, it is possible to prevent the conventional strip meandering that occurs in the looper car portion from causing large meandering in the vicinity of the bridle roll, which causes problems such as ear pinching.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 schematically shows an example of a process in which a looper car according to the present invention is used. For example, the metal strip 42 unwound from the payoff reel 41 enters the heating furnace 44 via the inlet looper 43, is plated in the plating bath 45, undergoes heat treatment etc. in the chemical processing equipment 46, and then passes through the outlet looper 47. After that, it is wound onto a tension reel 48. A looper car 49 is provided on the entrance side looper 43 and moves to the left and right in the figure so as to absorb variations in the speed of the metal strip 42. An embodiment of the present invention is provided in this looper car 49.

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a side view thereof. A detection device 11 for detecting meandering of the metal strip 3 is provided on the looper car of the looper device. This detection device 11 has a light emitting section 12 and a light receiving section 13 of a phototube arranged opposite to the upper and lower surfaces of the metal strip 3 with the metal strip 3 in between, and detects the amount of light blocked by the metal strip 3. Detect meandering. This detection device 11 is provided at a position close to the roll 21. In this case, it is preferable to arrange the metal strip 3 on the side that leaves the roll 21 from the viewpoint of the sensitivity of meandering detection.
It may also be provided with the metal strip on the side that enters 1 sandwiched therebetween.

The roll 21 on the looper car 2 has its bearing 22 mounted on a flange 24 of a U-shaped frame 23. This frame 23 has a vertical pin 2 whose central part of the web 25 is placed on the center line of the looper car 2.
Connect to 6. This vertical pin 26 is provided on the looper car at a position behind the roll 21. The U-shaped frame 23 is capable of swinging in a horizontal plane around a vertical pin 26.

The swinging device 30 has the above-mentioned U-shaped frame 2.
It is constituted by a hydraulic cylinder device in which a rod is connected to the tip of the flange 24 of No. 3, and the main body is attached to a looper car. This hydraulic cylinder device operates in response to a signal from the meandering detection device 11 to cancel the meandering of the metal strip 3. A control device for this purpose is mounted on the looper car (not shown).

Since the looper car moves, power is supplied to the meandering detection device, rocking device, hydraulic unit, control device, etc. using a cable reel or the like.

[0013]

[Effects of the Invention] Conventionally, it has been difficult to effectively prevent meandering because the looper car originally moved, but according to the present invention, the meandering detection device mounted on the looper car and the meandering detection device of the present invention The synergistic effect of the combination of rocking devices has made it possible to prevent meandering of the metal strip near the looper car and the priddle roll very efficiently.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the invention.

FIG. 2 is a side view of an embodiment of the invention.

FIG. 3 is a schematic side view of the entire device to which the present invention is applied.

[Explanation of symbols]

1 Looper device 2 Roopaka 11 Meandering detection device 12 Light emitting part 13 Light receiving part 21 roll 22 Bearing 23 Frame 24 Flange 25 Web 26 Vertical pin 30 Rocking device

Claims (1)

[Claims] 1. A detection device for detecting meandering of a metal strip is provided on a looper car of a looper device, a roll on the looper car is swingably attached to the looper car, and the meandering of the strip is canceled based on a signal from the detection device. What is claimed is: 1. A meandering prevention device for a looper device, characterized in that it is provided with a rocking device that swings and controls a roll in a direction.