JPH03114608A - Correction device for meandering of transfer steel strip - Google Patents

Abstract

PURPOSE:To stabilize a transfer operability by tiltably providing an in/out transfer roll within a horizontal plane and a press roll within a vertical plane by a meandering correction device provided on the horizontal flat passing part of a transfer steel strip. CONSTITUTION:Inlet side and outlet side transfer rolls 2, 3 and a press roll 4 pushing down a steel strip S therein are provided by a transfer steel strip meandering correction device 1 provided on a horizontal flat part. The transfer rolls 2, 3 are made oblique in the direction correcting the meandering of the steel strip S within a horizontal plane and a press roll 4 is composed so as to become oblique within the plane perpendicular to the transfer center line to the position where both end lengths of the steel strip S are equalized. Consequently, the steel strip S located between both transfer rolls 2, 3 can be transferred in the state of a uniform tension being acted without its loosening and the transfer operability can be stabilized.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a meandering correction device for a conveyed steel strip, which is installed in a long conveyance path in a continuous processing line for steel strips. The present invention relates to a meandering correction device provided in a horizontal flat path section in a conveyance path.

[Conventional technology]

In the long conveyance path in the continuous process line for steel strips, the steel strips are conveyed on a large number of conveyor rolls.
Meandering often occurs mainly due to poor shape of the steel strip,
This may lead to operational instability that reduces productivity.

Therefore, in order to correct the meandering and obtain smooth threading, various meandering correction devices are used.

This meandering correction device can be roughly divided into two types: forming a dedicated conveyance path section in the conveyance path for meandering correction;
An intermediate guide 11-ru method that utilizes the reversal or bending part in the fastest path to rewind the steel strip into a Ll-ru for meandering correction, and a conveyor system installed in the horizontal flat path section of the steel strip conveyance path. Using rolls, the conveyance roll is tilted in a horizontal plane, and the steel strip traveling direction and conveyance IJ are adjusted by tilting the conveyance roll.
- There is a ring roll method that corrects the meandering of the steel strip by utilizing the deviation from the direction of rotation of the steel strip.

As a meandering correction device installed on a long horizontal flat path section of a steel strip conveyance path, the intermediate guide roll method requires a large installation space because the height and width of the device needs to be approximately three times the width of the steel strip. is not suitable.

A conventional ringer-roll type meandering correction device corrects meandering by swinging at least a pair of rotatable correction rolls that pinch the steel strip from above and below about a swing axis perpendicular to the steel strip. Japanese Patent Application Publication No. 6, which was constructed as follows ], -]2(]
No. 3059, Japanese Unexamined Patent Publication No. 61-20752, which is configured to correct meandering by pushing an auxiliary roll that applies a pressing force to the steel strip while tilting -l.
5 and Japanese Unexamined Patent Publication No. 172526, Japanese Patent Publication No. 57-11377, in which meandering is corrected by tilting at least one pair of adjacent conveyance rolls in opposite directions in a plane perpendicular to the conveyance path center line, and - Utility Model No. 61-1 in which meandering is corrected by tilting a group of conveyor rolls within a horizontal plane
There is a technique disclosed in Publication No. 38407 and the like.

[Problem to be solved by the invention]

However, in the technique disclosed in Japanese Patent Application Laid-open No. 61-203059, when the correction roll is tilted in order to control the amount of meandering of the steel strip on the exit side of the meandering correction device to zero, the amount of meandering of the steel strip on the entrance side of the meandering correction device is There is a problem that the amount of meandering of the steel strip is increased.
The technology disclosed in Japanese Patent No. 172526 uses a phenomenon in which the tension acting on both ends of the steel strip is biased, and the tension is biased toward the high tension side due to the "rising effect" caused by the biased tension in the steel strip. Since meandering correction has been achieved, the response at the time of correction is left to the steel strip, and reliable operation cannot be expected. At the same time, if you try to achieve meandering correction quickly and with good response, there will be excessive damage to the side edges of the steel strip. Since an uneven tension is applied and the steel strip is improperly deformed, there is a problem that the response of the meandering correction operation is poor. The technique shown in 2 has the advantage that no excessive force is applied to the steel strip during the meandering correction operation, but since it does not constrain the steel strip, it is possible to reliably and accurately apply meandering correction force to the steel strip. Therefore, there is a problem that the obtained meandering correction effect is uncertain.

In other words, conventional meandering correction devices installed in the horizontal flat path portion of the steel strip conveyance path either apply too much or too little restraining force to the running steel strip, or the tension applied to the steel strip is too large or too small. has become excessive.

Therefore, the present invention was devised to solve the problems of the prior art described in 2. It is an object of the present invention to apply a suitable restraining force to the steel strip, and to The technical challenge is to correct the meandering of the steel strip without generating biased tension, thereby achieving reliable, smooth, and highly responsive meandering correction in the horizontal flat path section of the steel strip conveyance path. The purpose is to obtain movement.

[Failure to solve the problem]

Means of the present invention to achieve the above object is a meandering correction device provided in the horizontal flange 1 bus section in the steel strip conveyance path, at least an inlet conveyor roll, an outlet conveyor roll, and both conveyor rolls. It has a presser roll positioned between them and applies a downward force to the steel strip in the conveyance path, and the exit conveyance roll/or both conveyance rolls are tilted in a direction to correct the meandering of the steel strip in a horizontal plane. The holding roll is provided so as to be tiltable within a plane perpendicular to the center line of the conveyance path to a position where the lengths of both ends of the steel strip between both conveyance rolls are made equal.

The pressing force exerted by the presser roll on the steel strip being conveyed is:
The force acting on both ends of the steel strip, the tension, is approximately equal and is set to a constant value that can eliminate the occurrence of slack in the steel strip.

[Effect]

The presser roll is placed between the two transport rolls, and applies a pressing down force of a constant value to the steel strip between the two transport rolls. It is being transported while being pressed against a surface.

In this state, when meandering occurs in the steel strip, both conveyor rolls tilt in the horizontal plane in the direction to correct the meandering on the entrance and exit sides of the steel strip, and A meandering correction force is applied to the steel strip due to the deviation in the rotational direction of the conveyor roll. The meandering correction force acting on the steel strip from this conveyance roll acts on the steel strip reliably and effectively because the steel strip is pressed against the circumferential surface of the conveyance roll by the presser roll.

In addition, in conjunction with the tilting of both transport rolls, the press roll is tilted so that the lengths of both ends of the steel strip between both transport rolls are approximately equal, so that the output transport roll or both transport rolls can be used to correct meandering. Even if the steel strip is tilted and displaced, a large biased tension will not be generated at both ends of the steel strip between the two conveyor rolls.

By setting the downward force exerted on the steel strip by the presser roll to a constant value that eliminates the occurrence of slack in the steel strip, the force acting on both ends of the steel strip is almost equal, and the steel strip between both conveyance paths is The strip is always conveyed with a substantially uniform tension distribution over its entire width, thereby stably achieving and maintaining high speed conveyance of the steel strip.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

1 to 3 show a meandering correction device l according to the present invention, in which FIG. 1 shows an overall perspective view, FIG. 2 shows a side view, and FIG. 3 shows a plan view. 1 has a pair of conveyance rolls, an incoming conveyance roll 2 and an outgoing conveyance roll 3, whose tilting center is set at the center point in the axial direction, and both conveyance rolls 2.3 between both conveyance rolls 2.3. The output conveyance roller 4 is arranged in such a manner that it applies a downward force to the steel strip S between the rollers 3 and 4, and has a tilting center at the center point in the axial direction. A meandering sensor 9°-D for detecting meandering of the steel strip S is installed downstream of the steel strip S.

That is, as shown in the side view shown in FIG. 2, the presser rolls 4 are arranged in a somewhat staggered manner with respect to both the conveyor rolls 2.3, and apply a certain pressing force to the steel strip S. ing.

Now, when a meandering occurs in the steel strip S in the direction shown by the arrow C in FIG. 4, the meandering sensor 4J-D detects the direction and amount of the meandering that has occurred. According to this detection signal, both III feed rolls 2.3 tilt in the direction of arrow i3 by an angle corresponding to the amount of meandering of the steel strip S, and by this tilting, a meandering correction force proportional to the tilting angle in the direction of arrow d is applied to the steel strip. Let it act on S.

The presser roll 4 is the both transport rolls 21. In conjunction with the tilting of the two transport rolls 2.3, the two transport rolls 2.3 are tilted in the direction of the arrow by an angle corresponding to the tilting angle according to the amount of tilting force of the two transport rolls 2.3. 2.
By making the lengths of both ends of the steel strip S between 3 equal, the steel strip S becomes
To correct meandering without generating biased tension at both ends.

5 and 6 show the simplest configuration example of a tilting drive mechanism for both transport rolls 2.3 and presser roll 4, in which one end of both transport rolls 2.3 is attached to a fixed part 9 with its axis centered. is fixed so as to be tiltable in a horizontal plane by a vertical pivot shaft 7 having a vertical axis, and one end of the presser roll 4 can be tilted in a vertical plane by a horizontal pivot shaft 8 having an axis parallel to the fixed part 9. The other end of the presser roll 4 is connected to the other end of both transport rolls 2.3, which are pivoted and slidably supported on a horizontal rail 10, and the other end of the presser roll 4 is connected by a connecting arm 6.6, and the lower end is attached to a fixed part 9.
It is configured to be supported by a drive source 5 such as a cylinder fixed to.

The tilting drive mechanism shown in FIGS. 5 and 6 has a structure in which the tilting of both transport rolls 2.3 and the tilting of the presser roll 4 are linked, but the tilting of the individual rolls is completely controlled. It goes without saying that it is also possible to do it independently.

10~ In the embodiment shown in Fig. 4, the movement of each roll 2.3.4 when correcting the meandering of the steel strip S is mainly focused on the carrying effect, and Figs. 5 and 6 show the movement of each roll 2.3.4. The example is
The movement of each roll 2.3.4 when correcting the meandering of the steel strip S is shown, mainly based on the Seno-1-kari effect.

〔Effect of the invention〕

Since the present invention has the configuration described in "-", it produces the following effects.

The action of the presser roll can provide sufficient restraint to correct the meandering of the steel strip on the output conveyance roll, thereby ensuring correction of the meandering that occurs in the steel strip due to the tilting of the output conveyance roll. This can be achieved quickly and with good responsiveness.

If not only the output conveyance roll but also the input conveyance roll are tilted together, the amount of meandering of the steel strip on the input side of the apparatus can be reduced, so that meandering can be quickly corrected.

During the meandering correction operation of the steel strip, no biased tension is generated at both ends of the steel strip, and a safe meandering correction operation of the steel strip can be obtained.

Since the steel strip between both conveyance rolls is conveyed with uniform tension applied thereto without loosening, the operability of conveying the steel strip can be stabilized and productivity can be improved.

If there is enough space to allow both transport rolls and presser rolls to tilt, and space to arrange the presser rolls in a staggered manner relative to both transport rolls, it can be installed in the steel strip transport path, and these spaces can be used. Since it is extremely small, there are almost no problems in terms of space when installing it in the steel strip conveyance path, regardless of whether it is an existing or new installation.

[Brief explanation of drawings]

1 to 3 show an embodiment of the apparatus of the present invention, in which FIG. 1 is an overall perspective view, FIG. 2 is a side view, and FIG. 3 is a plan view. FIG. 4 is an overall perspective view showing an example of meandering correction operation in the embodiment shown in FIG. 1. 5 and 6 show an example of a tilting drive mechanism for each roll, with FIG. 5 being a plan view and FIG. 6 being a side view. Explanation of symbols 1; Meandering correction device; 2; Inlet conveyance 1-I-ru; 3; Outlet conveyance roll; 4; Presser roll; 5; Drive source; 6; Connection arm; 7; Vertical pivot axis; 8; horizontal pihosoto axis,
9; Fixed part, 10; Rail, S; Steel strip, D; Meandering sensor

Claims (2)

[Claims] (1) A meandering correction device (1) installed in a horizontal flat path portion of a steel strip conveyance path, which comprises at least an inlet conveyor roll (2) and an outlet conveyor roll (2).
3) and a presser roll (4) located between the two transport rolls (2) and (3) to apply a downward force to the steel strip (S) in the transport path, Roll (2) or both transport rolls (2) (
3) is provided so as to be tiltable in a direction to correct the meandering of the steel strip (S) within a horizontal plane, and the presser roll (4) is further provided with both the transport rolls (
2) A meandering correction device for a conveyed steel strip, which is tiltable in a plane perpendicular to the center line of the conveyance path to a position where the lengths of both ends of the steel strip (S) between (3) are made equal. (2) The pressing down force exerted by the presser roll (4) on the steel strip (S) being conveyed is adjusted such that the forces acting on both ends of the steel strip (S) are approximately equal. 2. The meandering correction device for a conveyed steel strip according to claim 1, wherein the meandering correction device for a conveyed steel strip is set to a constant value capable of eliminating the occurrence of slack in the conveying steel strip.