JPH07116725A - Method for controlling meandering of strip in looper - Google Patents

Abstract

PURPOSE:To correct a strip's meandering at an early stage without depending on a loop car's running position following to a storing amount of the strip. CONSTITUTION:In order to avoid a running loop car, a guide roll 11 for a strip 1 is divided in the left and right, each guide roll 11A, 11B is made freely opened and closed in the horizontal direction, strip's meandering amount detecting units 14, 15 are installed on each attaching stand 12A, 12B of the guide rolls 11 at the loop car's running position where the storing amount of the strip 1 is made maximum, at least. The steering roll is regulated corresponding to the meandering amount of the steel strip detected with the meandering amount detecting units 14, 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the meandering of a strip in a looper, and more particularly to a looper capable of quickly correcting the meandering of the strip irrespective of the running position of the loop car due to the storage amount of the strip. The present invention relates to a strip meandering control method.

[0002]

2. Description of the Related Art As a looper of a type in which a loop car is run in a horizontal direction to adjust the storage amount of strips, the following is disclosed in JP-A-53-104559. Hereinafter, the related art 1 will be described with reference to the drawings.

FIG. 7 is a front view showing prior art 1, and FIG.
7 is a partially enlarged plan view of FIG. 7, and FIG. 9 is a partially enlarged side view of FIG. 7. As shown in FIGS. 7 to 9, the prior art 1 is
A guide roll 3 that is movable up and down by a cylinder 2 is arranged at a space below the strip 1 so that the strip 1 is supported by the guide roll 3 and the guide roll 3 is sequentially retracted as the loop car 4 moves. Is. As shown in FIGS. 8 and 9, the guide rolls 3 are arranged in a V shape to prevent the strip 1 from meandering.

As a strip meandering detection device in a looper, Japanese Patent Laid-Open No. 3-179204 discloses
The following is disclosed. Hereinafter, the related art 2 will be described with reference to the drawings.

FIG. 10 is a side view showing the prior art 2, FIG.
FIG. 1 is a front view showing a conventional technique 2. As shown in FIG. 10 and FIG. 11, in the conventional technique 2, water is layered in the width direction of the strip 1 from a nozzle 5 arranged above the strip 1, and an optical fiber 7 is arranged in the water stream 6. The light from the rod-shaped light source 9 is directed toward the strip 1 through the protective glass 8 arranged in the lower part of 1, and the region blocked by the strip 1 is detected by the camera 10 connected to the optical fiber 7, and , The amount of meandering of the strip 1 is detected.

A meandering detection device as shown in the prior art 2 is
Loop car 4 in a looper as shown in Related Art 1
However, if the loop car 4 and the meandering detection device interfere with each other, it cannot be installed. Therefore, since the loop car 4 must be installed in an area where the loop car 4 does not run, a steering roll (not shown) is provided on the exit side of the strip 1 of the looper, that is, the looper exit side, and the meandering detection is performed immediately after this steering roll. The device was installed and the steering roll was adjusted according to the meandering amount of the strip 1.

[0007]

However, when the storage amount of the strip 1 in the looper is small, that is, when the loop car 4 moves to the short end side (left side in FIG. 7), the strip 1 Since the amount of meandering is small, the meandering can be effectively prevented, but when the amount of strip 1 stored in the looper is large, that is, the loop car 4 moves from the center of the looper to the long end side (the right side in FIG. 7). When moving, the meandering of the strip 1 cannot be effectively prevented.

The reason for this is as follows. That is, when the loop car 4 is running to the long end side, even if the meandering of the strip 1 is detected immediately after the steering roll on the exit side of the looper, if the meandering of the strip 1 occurs in the loop car 4 and rolls out, As a result of the strip 1 being folded at the end surface of the roll of the loop car 4, the folding of the strip 1 is caught at the end surface of the steering roll in the steering roll on the looper exit side. Therefore, the meandering of the strip 1 cannot be corrected no matter how much the steering roll is tilted. And once this happens, the strip 1
In addition to becoming a defective product over a wide range, the line stops and it takes a long time to repair the line.

On the other hand, in the prior art 1, the strip meandering prevention means by the V-shaped arrangement of the guide rolls 3 always provides a constant correction force depending on the thickness and material of the strip 1, the tension applied to the strip 1, and the like. The effect cannot be expected so much because it cannot be added to. Moreover, when the guide rolls 3 are arranged in a V-shape, the edge of the strip 1 scrapes the surface of the guide rolls 3, so that the life of the guide rolls 3 becomes extremely short.

Therefore, an object of the present invention is to quickly correct the meandering of the strip irrespective of the traveling position of the loop car due to the storage amount of the strip, and also to prevent the guide roll from being damaged by the traveling of the strip. It is to provide a method for controlling strip meandering in a looper.

[0011]

SUMMARY OF THE INVENTION In order to avoid a running loop car, the present invention divides the strip guide rolls into left and right parts, and allows each guide roll to be opened and closed horizontally, at least the strip storage amount. Is provided on each mounting base of the guide rolls in the vicinity of the traveling position of the loop car in which the maximum amount is provided, and a meandering amount detector of the strip is provided, and the steering roll is adjusted according to the meandering amount of the strip detected by the meandering amount detector. Then
Thus, it is characterized in that the meandering of the strip is corrected at an early stage.

[0012]

[Function] The strip guide roll is divided into two parts, left and right,
By allowing each guide roll to open and close horizontally, it is possible to prevent interference with the loop car, and by providing a strip meandering detector on the mounting base of each guide roll, the strip roll can be moved regardless of the moving position of the loop car. Can be corrected early, and since the guide roll is not inclined, there is no fear of damage to the guide roll due to running of the strip.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a strip meandering control method for a looper according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an embodiment of a strip meandering control method in a looper of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a plan view of FIG.

In FIG. 1 to FIG. 3, 11 is a guide roll of the strip 1, which is an operation side guide roll 11A.
And the drive side guide roll 11B are divided into two parts on the left and right. The guide rolls 11A and 11B are mounted on the mounting base 1
The shafts 13A and 13B are attached to the shafts 2A and 12B so as to be openable and closable in a horizontal plane, and are sequentially opened and closed as the loop car 4 moves so as not to interfere with the loop car 4. 14 and 15 are mounting bases 12A and 12
It is a movable strip meandering amount detector provided in B.
The strip meandering amount detector 14 is composed of a plurality of photoelectric tube sensors, and the photoelectric tube sensors include a light source 14A provided at intervals in the axial direction of the guide roll 11 and a light source 1
4A and the light receiver 14B which receives the light from 4A. Similarly, the other strip meandering amount detector 15 is also composed of a plurality of photoelectric tube sensors including a light source 15A and a light receiver 15B.

In the strip meandering amount detectors 14 and 15, the loop car 4 is moved to a position of about 85% of the longest end (solid line position in FIG. 1) and a position of about 65% (in FIG. 1). It is provided at a total of two locations (two-dot chain line position). The strip meandering amount detector need not be provided on the short end side of the looper because the strip meandering is unlikely to occur on the short end side, and even if the strip meandering occurs on the short end side, the strip meandering amount detector is provided on the exit side of the steering roll 16. This is because the meandering can be easily corrected by the fixed optical meandering detector 17, for example. Reference numeral 18 is a controller for tilting the steering roll 16 according to detection signals from the movable strip meandering amount detectors 14 and 15 and the fixed type meandering detector 17.

When the strip meandering amount detectors 14 and 15 detect that the strip 1 is out of the center position, the signal is sent to the controller 18. The controller 18 commands the steering roll 16 to return the strip 1 to the central position of the guide roll 11. In this way, the meandering of the strip 1 can be corrected early even when the loop car 4 moves to the long end side.

A control method for the case where the strip meandering amount detectors 14 and 15 are provided with three light sources 14A and three light receivers 14B will be described with reference to the flowchart of FIG. When the strip detection signal is output from the first stage light receiver 14B (inside) of the strip meandering amount detectors 14 and 15 on the operation side, the controller 18 steers a fixed amount of a correction operation signal for a certain period of time. When the strip detection signal is not output from the first stage photodetector 14B after a lapse of a certain time after sending to the roll 16, the steering roll 16 is returned to the original operation position on the assumption that the correction operation is completed.

When a strip detection signal is output from the second stage photodetector 14B (center), the controller 18 further corrects the correction amount of the first stage, and when it is not detected after a fixed time. Returns to the correction amount of the first step.

When a strip detection signal is output from the third stage light receiver 14B (outside), the controller 18 issues a line stop signal to stop the line, issues an alarm, and switches to manual correction. .

Also on the drive side, the steering roll 16 is operated according to the same procedure as on the operation side.

An example of the meandering of the strip measured on the operation side is shown in FIG. As is apparent from FIG. 5, in the case of the conventional method of FIG. 6, the runout width of the strip is about 40.
Although it was 0 mm, it can be seen that the application of the present invention reduced the strip runout width to about 1/2.

[0022]

As described above, according to the present invention, by mounting the strip meandering amount detector integrally with the openable / closable strip guide roll, the problem of interference with the loop car is eliminated, so that the loop car travels. Regardless of the position, it is possible to quickly correct the meandering of the strip, and there is a useful effect that the guide roll is not damaged by the running of the strip as in the mechanical meandering correcting method.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a strip meandering control method in a looper according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a flowchart of control according to the present invention.

FIG. 5 is a graph showing a swing width of a strip according to a conventional method.

FIG. 6 is a graph showing the swing range of a strip according to the present invention.

FIG. 7 is a front view showing Prior Art 1.

8 is a partially enlarged plan view of FIG.

9 is a partially enlarged side view of FIG.

FIG. 10 is a side view showing a related art 2.

FIG. 11 is a front view showing Prior Art 2.

[Explanation of symbols]

 1: Strip, 2: Cylinder, 3: Guide roll, 4: Loop car, 5: Nozzle, 6: Water flow, 7: Optical fiber, 8: Protective glass, 9: Light source, 10: Camera, 11: Guide roll, 12A, 12B : Mounting frame, 13A, 13B: Axis, 14, 15: Movable meandering detector, 14A, 15A: Light source, 14B, 15B: Light receiver, 16: Steering roll, 17: Fixed meandering detector, 18: Controller .

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G01B 11/04 Z // B21B 37/00 BBH 37/68

Claims (2)

[Claims] 1. In order to avoid a running loop car,
The guide rolls of the strip are divided into left and right, each of the guide rolls can be opened and closed in the horizontal direction, and at least the guide rolls of the guide rolls at the running position of the loop car at which the storage amount of the strip is maximized are mounted on the mounts of the strips. A strip in a looper, characterized in that a meandering amount detector is provided and a steering roll is adjusted according to a meandering amount of the strip detected by the meandering amount detector, thus correcting the strip meandering early. Meandering control method. 2. The meandering control method according to claim 1, wherein the meandering amount detector comprises a plurality of photoelectric tube sensors provided at intervals in the width direction of the strip.