JPH0797111A - Zigzag correcting device of strip on process line and its method of use - Google Patents

Abstract

PURPOSE:To effectively correct zigzag of a strip even if tension is practically not working on it. CONSTITUTION:Regarding a process line where as strip S is continuously processed, a horizontally directional conveying passage for a strip is formed by arranging conveying rollers 12, 14, which shaft centers are horizontal and are at a right angle to the conveying direction of the strip S, and at least one pair of conveying rollers 11, 13 given a forward and reverse steering angle + or -alphawithin the horizontal surface to the conveyance of the strip are arranged near the conveying rollers 12, 14 at a right angle direction to conveying direction of the strip in a freely elevating manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a meandering correction or centering technique capable of effectively correcting meandering in a section in which no tension is applied, such as an inlet side of a process line for continuously processing or processing a metal or non-metal strip. .

[0002]

2. Description of the Related Art In order to continuously process strips, the trailing end of the preceding strip and the leading end of the following strip are joined by welding or other means on the inlet side of the process line. At this time, if any of the strips is eccentric from the center of the line, or if the front and rear strips are not on the correct straight line, the planar shape of the joined strips will be a V shape, which may cause tension or a high temperature. In the section (2), the tension distribution is biased and the strip breaks or is caught in the equipment in the line.

In the conventional strip process line, meandering strips are forcibly centered by a mechanical means such as a side guide. In this method, however, the strips may break when they are thin,
There is a problem of breaking. Various steering rolls are also used. Most of them are for inclining the conveying roll in the line in the width direction or in the line direction in the horizontal plane. JP-B-61-22655 and JP-A-61-22655
-207525 gazette and others. As an example, the one described in JP-A-61-207525 is shown in FIG.

FIG. 6 is a perspective view of the vicinity of a tracking roll, in which 50 is a tracking roll, 51 is a movable side bearing, 52 is a moving cylinder, 53 is a fixed side bearing, and S is a strip.
A pivot bearing is adopted as a bearing on one end of the tracking roll 50 to make a fixed side bearing 53, and a bearing on the other end is a movable side bearing 51.
As a result, the tracking roll 50 is swung in the horizontal plane about the fixed-side bearing 53 to move the strip S in the width direction when the moving cylinder 52 moves in and out.

Although such a tracking roll is effective for correcting meandering, non-uniform friction occurs between the plate surface and the roll, dust is generated due to abrasion, and the strip is scratched or deformed. However, depending on the structure, it is quite complicated and requires space for installation, and the equipment cost is high. Further, more generally, it is also practiced to apply a crown to the rolls in the line and use the self-centering action of the crown.
The crowned roll is basically effective only in a section where tension is applied.

Due to such a situation, there is no effective meandering correction means, for example, when the tail end of the strip leaves the payoff reel and little tension acts on the entrance side of the thin process line. Met.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a meandering correction device capable of effectively correcting meandering even in a state where almost no tension is applied.

[0008]

SUMMARY OF THE INVENTION A strip meandering correction device in a process line according to the present invention includes a conveying roller having a horizontal axis and a direction perpendicular to the strip conveying direction in a process line for continuously processing strips. Is provided to form a horizontal conveyance path for the strip, and at least one pair of steering rollers that give two forward and reverse steering functions to the conveyance of the strip are arranged in the vicinity of the conveyance roller so as to be vertically movable. The two normal / reverse steering functions are, for example, the above-mentioned steering roller provided with two normal / reverse steering angles in a horizontal plane.

Further, in the method of using the strip meandering correction device in the process line of the present invention, in the process line for continuously processing the strip, a transport roller having a horizontal axis and a direction perpendicular to the transport direction of the strip is arranged. Forming a horizontal conveying path for the strip, and at least one pair of steering rollers that provide two forward and reverse steering functions with respect to the conveying direction of the strip are arranged in the vicinity of the conveying roller so as to be vertically movable. The steering roller is selectively raised according to the meandering direction of the strip.

[0010]

[Operation] FIG. 5 is a plan view showing a state in which the mounting angle of the support roller in the horizontal plane is variously changed in the transport table of the strip S having the horizontal transport direction. The roller 11 has a steering angle (also referred to as a skew angle) of an angle α in a horizontal plane with respect to a direction perpendicular to the transport direction of the strip S, and tries to transport the strip S in the direction of the arrow R ₁ , that is, to the right. To do. On the contrary, the roller 13 has a steering angle of -α in the horizontal plane and tries to convey the strip S in the direction of arrow R ₃ , that is, to the left. The roller 12 has a steering angle of 0 degree, that is, a direction perpendicular to the conveying direction, and tries to convey the strip S in the direction of the arrow R ₂ , that is, the original conveying direction.

According to the present invention, these three types of rollers are arranged so as to be able to move up and down, and any one of them is selectively raised to support and convey the strip so as to correct the meandering in any direction. Is.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a meandering correction device installed on the process line entrance side of a steel strip, and FIG. 2 is a partial side view taken along the line AA. On the lower surface of the strip S conveyed in the horizontal direction,
Rollers that support and convey this are arranged, and in FIG. 1, four rollers 11, 12, 13, and 14 are shown. roller
The axes 12 and 14 are horizontal and are perpendicular to the conveying direction. On the other hand, the roller 11 has a steering angle of an angle α with respect to the direction perpendicular to the transport direction of the strip S in the horizontal plane, and the roller 13 paired with the roller 11 has a steering angle of −α in the horizontal plane.
In the following description, the rollers 11 and 13 will be referred to as steering rollers, and the rollers 12 and 14 will be referred to as conveyance rollers.

As shown in FIG. 2 when viewed from AA in FIG. 1, the rollers 11 to 14 are lift cylinders 21, 22, 23, 24 (21, 22).
(Not shown) is supported so that it can be moved up and down, and when the strip S is in a normal passing state, the transport roller 1
The strip S is continuously conveyed as it is by setting 2 and 14 in the raised state and the steering rollers 11 and 13 in the lowered state.

In FIG. 1, when the strip S meanders to the left, the steering roller 11 having a steering angle α out of the pair of steering rollers 11 and 13 is moved up, and the transport roller 12 is moved down. Is guided in the direction of arrow R and the meandering is corrected. On the contrary, when the strip S meanders to the right, the steering roller 13 having the steering angle -α is raised,
By lowering the transport roller 14, the strip S is guided to the left and the meandering is corrected.

The meandering correction device of the present invention does not require that the strip S be under tension, but rather the reaction is more sensitive if it is installed in a section where no tension is exerted, and a roller with a steering angle is used. If the strips touch,
If there is tension, powder is generated due to slippage or scratches are generated, which is rather undesirable. Further, since the transport height (pass line height) of the strip S can be slightly changed in the section where the tension is not applied, the roller 11
It is not possible to move all of ~ 14 up and down, for example, transport rollers 12,
14 is fixed, and only the steering rollers 11 and 13 can be moved up and down.
When the eccentricity is detected, any one of the pair of steering rollers 11 and 13 may be raised to a position slightly higher than the conveying roller 12 or 14 depending on the direction of the eccentricity.

Further, although FIG. 1 shows only one roller provided with a steering angle in each direction, that is, only one pair,
It goes without saying that a plurality of pairs may be appropriately installed.
In this case, if the rollers in the direction perpendicular to the carrying direction are present in the vicinity at appropriate intervals, it is not always necessary to arrange the rollers in the direction perpendicular to the carrying direction for each roller having a steering angle.

FIG. 3 is a plan view showing another embodiment. The roller 11 having the steering angle in FIG. 1 is divided into two in the width direction of the line, and the short rollers 11a and 11b are attached to the frame 31 at the same steering angle. And the whole cylinder goes up and down. Although not shown, the same applies to the roller 13. When the width of the strip S is wide, the division with the strip S does not open the gap with the roller 12, and the rollers can be arranged densely.

Further, instead of providing the steering angle in the horizontal plane, the roller can be tilted in the vertical plane perpendicular to the conveying direction to provide the steering function. Figure 4
FIG. 3 is a side view of the strip as viewed in the transport direction, showing a state where the steering roller 15 is tilted by a tilt angle β (also referred to as a tilt angle) within a vertical plane perpendicular to the transport direction.

As a means for raising and lowering each roller, in addition to the raising and lowering cylinder, any mechanism such as a link mechanism and a screw mechanism may be used. The meandering correction device of the present invention does not wind the strip around the roll like a conventional steering roll, but only makes a light contact on the upper surface of the roller, so that the surface of the strip is flawed or wrinkled. There is nothing to do.

According to this embodiment, the eccentricity of the tail end of the strip, which has conventionally been generated in the range of ± 50 to 100 mm, is ± 20.
It could be suppressed to about mm.

[0021]

According to the present invention, the meandering of the strip in the section of the process line where the tension is hardly applied is corrected, and, for example, the welding condition with the succeeding strip is also improved, resulting in troubles such as welding breakage and exit side edge cutting processing. It has excellent effects such as decrease in

[Brief description of drawings]

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

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

FIG. 3 is a partial plan view showing another embodiment.

FIG. 4 is a partial side view showing still another embodiment.

FIG. 5 is a plan view illustrating the operation of the present invention.

FIG. 6 is a perspective view showing a conventional technique.

[Explanation of Codes] 11, 11a, 11b, 12, 13, 14, 15 Rollers (11, 11a, 11b, 13, 15 Steering Rollers) (12, 14 Transport Rollers) 23, 24 Lifting Cylinder 31 Frame 50 Tracking Roll 51 , 52 bearing 53 moving cylinder S strip

Claims (3)

[Claims] 1. In a process line for continuously processing strips (S), the axis is horizontal and the strips (S) are horizontal.
The transport rollers (12, 14) perpendicular to the transport direction of the strip (S) are arranged to form a horizontal transport path for the strip (S).
A process in which at least one pair of steering rollers (11, 13) that gives a forward / reverse two-way steering function to the transportation of the strip (S) is vertically movable near the transportation rollers (12, 14). A strip meandering correction device in a line. 2. The process according to claim 1, wherein the two forward and backward steering functions provide at least one pair of steering rollers (11, 13) with two forward and backward steering angles in a horizontal plane. A strip meandering correction device in a line. 3. In a process line for continuously processing strips, a transport roller having a horizontal axis and a direction perpendicular to the transport direction of the strips is arranged to form a horizontal transport path of the strips, and transport of the strips is performed. At least one pair of steering rollers that provide two forward and backward steering functions with respect to the direction are arranged in the vicinity of the conveying roller so as to be movable up and down, and the steering rollers are selectively raised according to the meandering direction of the strip. A method of using the strip meandering correction device in a process line, comprising: