JP2000351008A - Fixing device of stripper guide of plate rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix the tip part of a guide by bringing it in slide contact with the outer periphery of a work roll with a simple fixing means without requiring manual working by respectively arranging cylinders and turning support shafts to an upper face/side face of a support frame, turnably supporting a stopper to a turning support shaft and connecting the stopper and an extension rod of the cylinder through a link mechanism. SOLUTION: An air cylinder 9 is arranged on the upper face of a support frame 12 in which both ends are mounted to left/right chocks, a stopper 10 is turnably supported to a rotation support shaft 14 arranged to the side face of the support frame 12, the stopper 10 and the extension rod 15 of the air cylinder 9 are connected with a link mechanism. By driving the extension rod 15 in the right direction, a rod 17 is rotated clockwise to move a link rod 16 downward, the stopper 10 is rotated clockwise to abut on a tail part 6b, the tip part of a stripper guide is brought into contact with the outer periphery of a work roll. At this time, by a fixing means of the stopper 10, the stopper is fixed so that its tip part is positioned most downward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fixing a stripper guide for draining a sheet rolling mill,
The present invention relates to a device for fixing a stripper guide of a sheet rolling mill made of a steel material.

[0002]

2. Description of the Related Art In steel sheet rolling, particularly in thick plate rolling, usually, the sheet thickness is 4.5 to 300 mm and the sheet width is about 1 to 5 mm.
It is hot rolled to a length of 4 m and a maximum length of 55 m. This thick plate product is usually used as it is as an important member of steel structures such as ships, bridges, pressure vessels, large-diameter steel pipes, general structures, and offshore structures. For this thick plate rolling, a four-high rolling mill (quadruple reversible rolling mill) is generally used.

As shown in FIG. 9, the four-high rolling mill includes a housing 21, a pressing device 22, a pair of upper and lower backup rolls 2a and 2b, and a pair of upper and lower work rolls 3.
a, 3b. A feed roller 23 for transporting a rolled plate is provided before and after the four-high rolling mill. The pair of upper and lower backup rolls 2a, 2b
And a pair of upper and lower work rolls 3a and 3b, respectively.
Upper and lower backup roll chocks (bearings) 4a and 4b and upper and lower work roll chocks (bearings) 5a and 5b are provided.

The upper and lower work rolls 3a, 3b are provided with stripper guides 6, 7, respectively. These stripper guides 6 and 7 are composed of upper and lower work rolls 3a and 3a.
This is provided for draining the cooling water of b. The upper stripper guide 6 plays a role in smoothly rolling the warped rolling plate into the gap between the upper and lower work rolls 3a and 3b during plate rolling.

Further, the upper stripper guide (hereinafter simply referred to as "stripper guide") 6 provided on the upper work roll 3a will be further described with reference to FIGS. FIG. 7 is a view showing a position of a stripper guide in a conventional four-high rolling mill during plate rolling, and FIG. 8 is a view showing a fixed state of the stripper guide.

[0006] As shown in FIG.
Incorporates a shaft 6c provided in the stripper guide into a shaft hole 12a provided in a lower portion of the support frame 12 attached (supported) to the left and right upper backup roll chock 4a, and the stripper guide is provided around the shaft 6c. 6 has a rotatable structure. And during plate rolling,
Move the tip 6a of the stripper guide to the upper work roll 3a.
The stripper guide and the tail end 6b of the stripper guide on the side opposite to the work roll and the support frame 12 for fixing.
The stripper guide is fixed by fitting a T-shaped cotter 24 between the stripper guides. The fixing of the stripper guide by the T-shaped cotter 24 is performed as shown in FIG.
Of the stripper guide comes into contact with the tail end 6b of the stripper guide. As described above, the purpose of fixing the stripper guide is to allow the rolled plate to warp smoothly into the gap between the upper and lower work rolls and to drain the cooling water of the upper work roll during the plate rolling.

Next, a method of replacing a work roll will be described. The work roll is usually replaced by pulling out the lower backup roll from the four-high rolling mill for both the upper and lower work rolls. Then, after replacing the upper and lower work rolls drawn from the four-high rolling mill, the lower backup roll is returned to the four-high rolling mill together with the upper and lower work rolls.

For this reason, in order to replace the work roll,
Release the fixation of the stripper guide 6. The release of the fixing of the stripper guide 6 is performed by removing the T-shaped cotter 28 which is fitted between the stripper guide tail end 6b and the stripper guide support 12, as shown in FIG. After releasing the fixing of the stripper guide 6,
The stripper guide 6 is arranged around a shaft 6c of the stripper guide provided in the shaft hole 12a at the lower portion of the support frame 12.
Is rotated counterclockwise (in the direction of the arrow in FIG. 7) so that the tip 6a of the stripper guide and the lower portion 5c of the upper work roll chock are not caught. Thereafter, the lower backup roll is pulled out of the four-high rolling mill together with the upper and lower work rolls, and the lower backup roll is returned to the four-high rolling mill together with the replaced upper and lower work rolls, thereby completing the work roll replacement.

[0009]

However, the attachment and detachment of the T-shaped cotter must be manually performed in a narrow place between the transport table provided with the feed roller and the entry guide. This manual work has a bad working environment and involves dangers, so it is necessary to pay attention to safety aspects. For this reason, it takes a long time to attach and detach the cotter, during which time the line is stopped for a long time, and there is a problem that productivity is reduced. Further, in order to cope with the change in the roll diameter due to the abrasion of the plate roll of the backup roll and the work roll, several types of cotters need to be constantly provided.

Therefore, the present invention provides a stripper guide of a plate rolling mill which can fix the stripper guide by sliding the tip of the stripper guide to the outer periphery of a work roll without using a cotter requiring manual work. It is intended to provide.

[0011]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, a drainer stripper guide is rotatable around the outer periphery of a work roll of a plate rolling mill. In a stripper guide fixing device of a plate rolling mill for fixing a tip portion of the stripper guide at a position where the stripper guide slides on the outer periphery of the work roll, the both ends of the support frame are attached to left and right chocks, and a cylinder is mounted on the upper surface of the support frame. A stopper is provided for abutting the tail end of the stripper guide on the side opposite to the work roll so that the tip end of the stripper guide slides on the outer periphery of the work roll. And the stopper and the telescopic rod of the cylinder are connected via a link mechanism. .

In the stripper guide fixing device for a plate rolling mill according to the present invention, a stopper rotatably supported by a rotation support shaft provided on a side surface of a support frame is brought into contact with a tail end of the stripper guide. The tip of the stripper guide is fixed at a position where it comes into sliding contact with the outer periphery of the work roll. On the other hand, the fixing is released by moving the stopper away from the tail end of the stripper guide by a link mechanism connecting the telescopic rod of the cylinder provided on the upper surface of the support frame and the stopper. As described above, the stripper guide fixing device of the plate rolling mill of the present invention has a simple configuration including the cylinder, the stopper, and the link mechanism provided on the support frame. With this configuration, the stripper guide is fixed and the fixing of the stripper guide is performed. Release can be easily performed.

According to a second aspect of the present invention, in addition to the configuration according to the first aspect, the stopper is provided with a rotation in the same direction as the stopper so that the rotation support shaft is rotated. The present invention is characterized in that a cam-shaped stopper is provided in which the distance between the center and the contact surface of the stripper guide with the tail end is changed, and the link mechanism is connected to the cam-shaped stopper. In the stopper according to the first aspect of the present invention, a cam-shaped stopper is provided, the link mechanism is connected to the cam-shaped stopper, and the cam-shaped stopper is rotated in the same direction as the stopper.
The distance between the center of the rotation support shaft provided on the side surface of the support frame and the contact surface of the cam-shaped stopper with the tail end of the stripper guide can be easily adjusted.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view illustrating a fixing device for a stripper guide according to a first embodiment of the present invention, and FIG. 2 is a diagram illustrating a stopper and a link mechanism of the fixing device for a stripper guide according to the first embodiment. FIG. 3 is a view for explaining the stopper and the link mechanism of the fixing device according to the second embodiment of the present invention, and FIG. 4 is a view for explaining the results of the second embodiment.
FIG. 5 is a view for explaining a stopper and a link mechanism of the fixing device according to the third embodiment of the present invention.

(First Embodiment: Invention of Claim 1) In the first embodiment of the present invention, the above-described four-high rolling mill (see FIG. 9) was used. The roll diameter of the backup roll used in this four-high rolling mill is from 2000 mmφ (maximum diameter) to 180 mm.
At 0 mmφ (minimum diameter), the roll length is 4597 mm.
On the other hand, the work roll has a roll diameter of 1030 mmφ (maximum diameter) to 924 mmφ (minimum diameter) and a roll length of 4724 mm.
mm. With this four-high rolling mill, a slab of a steel material is formed into a sheet thickness of 4.5 to 360 mm and a sheet width of about 1 to 1 mm.
A thick plate is manufactured by performing hot rolling to 4.5 m. Usually, this thick plate product is often used as rolled.

As shown in FIG. 1, the stripper guide used in this embodiment is a shaft provided at a lower portion of a support frame 12 having both ends attached (supported) to upper and lower backup roll chock 4a as shown in FIG. In the hole 12a,
Incorporating the shaft 6c provided in the stripper guide,
The stripper guide 6 is rotatable around the shaft 6c.

This stripper guide fixing device is shown in FIG.
This will be described below. (In FIG. 2, the fixing device of the stripper guide is shown only on the right side of the support frame.
In the present embodiment (including the second embodiment), a stripper guide fixing device is similarly provided on the left side of the support frame. As shown in FIG. 2, an air cylinder 9 is provided on the upper surface of the support frame 12, and a stopper 10 rotatably provided on a side surface of the support frame 12, and a telescopic rod 15 of the cylinder 9 and the stopper are provided. And a link mechanism that is connected.

The air cylinder 9 is mounted on the support frame 1.
The shaft hole 13a of the cylinder bracket 13 welded to the upper part of the cylinder 2 and the shaft hole 9a provided on the rear side (the left side in FIG. 2) of the air cylinder 9 are rotatably connected by a pin A.

The stopper 10 is formed of an oval plate-like block, and a shaft hole 10a is formed above a plane portion of the plate-like block.
Is provided. This shaft hole 10a is provided on a stopper rotation shaft (rotation support shaft) provided on the side surface of the support frame 12.
14, the stopper 10 is rotatable about the stopper rotation shaft 14.

Next, the link mechanism will be described with reference to FIG.
The link mechanism includes a link rod 16 and a rod 17 that are curved.
Consists of The link rod 16 is a member for converting the linear movement of the telescopic rod 15 of the cylinder into the rotational movement of the stopper 10, and the rod 17 is a member for assisting the conversion of the linear movement to the rotational movement. Therefore, (a) the link rod 16 is the telescopic rod 1 of the cylinder.
The link rod 16 is provided with shaft holes 16a and 16b at both ends thereof. Then, a shaft hole 16a provided at the tip of the telescopic rod 15 of the cylinder and a shaft hole 16a of the link rod 16 are provided.
Are rotatably connected by a pin B, and the link rod 1
The shaft hole 16b of No. 6 and the shaft hole 10b provided on the lower left side of the stopper 10 are rotatably connected by a pin C. (B) Both ends of the rod 17 are provided with shaft holes 17a and 17b. Then, a shaft hole 17a of the rod 17 and a rotation shaft 12b provided on the left side of the stopper 10 on the side surface of the support frame 12 are rotatably connected by a pin D,
The shaft holes 17b at both ends of the rod 17 and the shaft holes 15a at the tip of the telescopic rod 15 of the cylinder are rotatably connected by the pins B.

The fixing of the stopper guide by the stopper by the link mechanism and the method of releasing the fixing will be described with reference to FIG. (A) Fixing of the stripper guide (the state shown by the solid line in FIG. 3) By driving the telescopic rod 15 of the cylinder to the right, the rod 17 rotates clockwise around the pin D to move the link rod 16 downward. Move. As a result, the stopper 10 rotates clockwise around the rotation shaft 14 so that the tip 10b of the stopper 10 is moved to the tail end 6b of the stripper guide.
, And the leading end of the stripper guide slides on the outer periphery of the work roll. At this time, the stopper is fixed by a stopper fixing means (not shown) at a position where the distal end portion 10b of the stopper is at the lowest position (the distal end portion 10b of the stopper is vertically below the stopper rotation shaft 14). As a result, even if the warped steel plate collides with the stripper guide during rolling, the tip of the stripper guide does not separate from the outer periphery of the work roll without rotating the stopper. Furthermore, since the impact load acting on the stopper when the upwardly warped steel plate collides with the stripper guide during the rolling of the plate becomes a structure acting on the stopper 10 and the stopper rotating shaft 14,
The driving power required for the air cylinder 9 is only the power required to rotate the stopper 10, and a small air cylinder can be used.

(B) Releasing the fixation of the stripper guide (indicated by the dashed line in FIG. 3) The cylinder rod 1
6 to the left, the rod 17
To rotate the link rod 16 upward in the counterclockwise direction. As a result, the stopper 10 rotates counterclockwise about the rotation shaft 14 and
b moves away from the tail end 6b of the stripper guide. Then, in order to replace the work roll, the stripper guide 6 is rotated counterclockwise about the stripper guide shaft 6c so that the tip 6a of the stripper guide and the lower part 5c of the upper work roll chock are not caught.

As described above, the fixing device for the stripper guide according to the present embodiment requires only the simple provision of the air cylinder, the stopper and the link mechanism on the existing support frame, and does not require much capital investment. And
If the stopper is worn or bent due to use, it can be easily replaced by removing the mounting pin. In addition, the simple operation of driving the air cylinder and rotating the stopper makes it possible to easily perform the work of fixing the stripper guide and the work of releasing this fixation. And no longer. As a result,
The stripper guide fixing operation and the fixing releasing operation can be performed extremely safely.

Since the work of attaching the cotter is eliminated, the work roll replacement time (one time / day) can be reduced to about 18 minutes / time (conventionally about 20 minutes / time), and the operation time of the four-high rolling mill can be reduced. It has been found that it is possible to improve the productivity of thick plates. This shortening of 2 minutes / time is highly effective in the production of a thick plate made of a steel material, and can increase the production of a thick plate of about 1760 t per year.

(Second Embodiment: Invention of Claim 2) Another embodiment of the stripper guide fixing device according to the present invention will be described with reference to FIGS. In this embodiment, the same four-high rolling mill as in the first embodiment was used, and the stripper guide of the first embodiment was used. The difference from the first embodiment is that the stopper has two configurations of a support portion and a cam-shaped stopper portion, and that the support portion and the cam-shaped stopper portion constitute a cam mechanism.

The support portion 18 of the stopper 11 of this embodiment is
As shown in FIG. 4A, similarly to the stopper of the first embodiment, the stopper is formed of an oval plate-like block, and shaft holes 18a and 18b are provided in upper and lower flat portions of the plate-like block, respectively. ing. The lower half of the support portion 18 is shown in FIG.
A groove 18c is provided as shown in FIG.
A cam-shaped stopper portion 19 is provided in c.

As in the first embodiment, the shaft hole 18a of the support portion 18 is inserted into a stopper rotating shaft 14 provided on the side surface of the support frame 12, and the stopper 11 (the support portion 1).
8) has a structure rotatable about the stopper rotation shaft 14 (see FIG. 4A). A shaft hole 18b of the support portion 18 and a shaft hole 19a are provided in the cam-shaped stopper portion 19,
A stopper rotating shaft 20 is inserted into these shaft holes 18b and 19a, and the cam-shaped stopper 19 is
0 (see FIG. 4A,
(See FIG. B).

The structure of the link mechanism of this embodiment different from that of the first embodiment is different from that of the first embodiment as shown in FIG.
Reference numeral 6 denotes a rotatable connection between the telescopic rod 15 of the cylinder and the cam-shaped stopper 19 of the stopper 11 of the second embodiment. And the shaft hole 16b of the link rod 16
And a shaft hole 19a provided on the right side of the cam-shaped stopper portion 19 is rotatably connected by a pin C.

The structure of the link mechanism which is different from that of the first embodiment, and the above-mentioned "structure in which the cam-shaped stopper 19 is rotatable around the stopper rotating shaft 20 inserted into the shaft hole 18b of the support 18". Accordingly, the stopper 11 of the present embodiment can form a cam mechanism between the support portion 18 and the cam-shaped stopper portion 19.

A cam mechanism constituted by the support portion and the cam-shaped stopper portion of this embodiment will be described with reference to FIGS. The portion of the groove 18c provided in the lower half of the support portion 18 with which the cam-shaped stopper portion 19 comes into contact is made a flat surface 18d.
This flat surface 18d is formed with a shaft hole 18a provided in the support portion 18.
And the stopper 11 formed by the shaft hole 18 (support portion 1)
8) A plane perpendicular to the central axis. On the other hand, as shown in FIG. 4A, the cam-shaped stopper portion 19 has a plane 19c in contact with the vicinity of the left end of the plane 18d in the groove of 18c and a plane 19d in contact with the plane 18d in the vicinity of the center axis of the stopper. Provided. Then, the cam-shaped stopper portion between the flat surface 19c and the flat surface 19d was processed so as not to contact the flat surface 18d in the groove of 18c.

At this time, when the plane of the cam-shaped stopper 19c is in contact with the plane 18d in the groove of the support (FIG. 4a: first posture), the center of the rotation axis 14 of the support is centered. And the distance X between the lower end portion 19e of the cam-shaped stopper portion and the tail end portion 6b of the stripper guide is set to a predetermined distance (for example, the maximum distance) at which the tip end of the stripper guide can slide on the outer periphery of the work roll. I do. When the plane of 19d of the cam-shaped stopper is in contact with the plane 18d in the groove of the support (FIG. 4b: second posture), the center of the rotation shaft 14 of the support and the stripper guide The distance X between the lower end portion 19e of the cam-shaped stopper portion and the tail end portion 6b is set to a predetermined distance (for example, a minimum distance) at which the leading end of the stripper guide can slide on the outer periphery of the work roll. As described above, the cam mechanism of the present embodiment has the
Is rotated in the same direction as the stopper 11 (support portion 18) about the stopper portion rotation shaft 20, so that the center of the rotation shaft (rotation support shaft) 14 of the support portion and the tail end of the stripper guide are moved. The distance between the abutting surfaces of the cam-shaped stopper portions that abut the above can be easily changed.

Further, a method of fixing the stopper guide by the stopper using the cam mechanism of this embodiment will be described. When the stripper guide is fixed, as in the first embodiment, the support portion 18 (stopper 11) is rotated by the cylinder to drive the telescopic rod 15 of the cylinder to the right.
, The tip 19e of the cam-shaped stopper comes into contact with the tail end 6b of the stripper guide, and the tip of the stripper guide slides on the outer periphery of the work roll. At this time, the plane of the cam-shaped stopper portion 19c comes into contact with the plane 18d in the groove of the support portion (the first posture in FIG. 4A). At this time, the distal end portion 19e of the cam-shaped stopper portion is positioned at the lowest position by the stopper fixing means (not shown) (the stopper portion rotation shaft 20 is the rotation shaft 1 of the support portion).
(The vertically lower position of No. 4), the support portion 18 (stopper 11) is fixed.

When the support rod 18 (stopper 11) is fixed and the telescopic rod 15 of the cylinder is driven rightward by the cylinder, the cam-shaped stopper 19 is rotated counterclockwise about the stopper rotation shaft 20. Rotate to
A position where the plane of 19d of the cam-shaped stopper portion comes into contact with the plane 18d in the groove of the support portion (the second posture in FIG. 4B). Then, the position of the tip of the cam-shaped stopper to be brought into contact with the tail end 6b of the stripper guide is changed from 19e to 19e.
f. In this way, the position where the cam-shaped stopper abuts on the tail end of the stripper guide can be adjusted. At this time, since the support portion 18 is fixed by a fixing means (not shown), the stopper rotation shaft 20 is located vertically below the rotation shaft 14 of the support portion. As a result, in both the first position and the second position, even if the warped steel plate during plate rolling collides with the stripper guide, the stopper 11 (support portion 18) does not rotate and the tip of the stripper guide is not rotated. It does not leave the outer periphery of the work roll.

Further, in this embodiment, the stripper is preferably fixed in the first position shown in FIG. 4A. At this time, as shown in FIG. 5, at the distance X between the center of the rotating shaft 14 of the support portion and the cam-shaped stopper portion 19 that is in contact with the tail end portion 6b of the stripper guide, the distance (X:
X1) is made longer than the distance (X: X2) of the second posture. By fixing the stripper in the first position shown in FIG. 4A, when the warped steel plate collides with the stripper guide during rolling, the support portion 18 is fixed and the cam-like stopper portion 19 is fixed. Only the counter-clockwise rotation about the stopper rotating shaft 20 is performed, and the fixing of the stripper can be changed to the second posture shown in FIG. 4B. At this time, since the collision load of the warped steel plate against the stripper guide is sufficiently larger than the fixed load of the air cylinder fixing the stripper, the movement from the first posture to the second posture easily occurs. And the warped steel plate collides with the stripper guide,
Since the distance X is reduced by (X1−X2), the collision load colliding with the stripper guide made of a steel plate is reduced, and the stopper 11 can be prevented from being damaged. As a result, there is no need to stop the line for replacing the stopper. (Conventionally, during plate rolling, an upside down rolled plate collides with a stripper guide and damages the cotter, and it takes a long time to replace the damaged cotter. Was.)

In the present embodiment, the flat surface 18d in the groove of the support portion is used.
19c and 19c are provided on the upper surface of the cam-shaped stopper portion in contact with
Although the plane d is provided, as shown in FIG. 7, the upper surface of the cam-shaped stopper stopper 19 is continuously contacted from the vicinity of the left end of the plane 18d of the groove 18c of the support 18 to the vicinity of the center axis of the stopper. A curved surface 19g may be provided.

The present invention is not limited to the stripper guide fixing device of the plate rolling machine of the present invention, and is applicable not only to a four-high rolling mill but also to a plate rolling machine in which a stripper guide is disposed on a work roll. The present invention can be applied not only when the stripper guide is disposed on both sides of the plate rolling mill but also when the stripper guide is disposed on one side of the plate rolling mill. Further, in this embodiment, the fixing devices for the stripper guide are provided on the left and right sides of the support frame. However, the fixing devices for the stripper guide may be provided only at the center of the support frame. In addition to this, the cylinder used for the fixing device of the stripper guide of the plate rolling mill of the present invention is not limited to the present embodiment, and has not only the air cylinder but also a hydraulic cylinder, a mechanical cylinder and other expanding and contracting means. Machinery can be used.

[0037]

As described above, according to the present invention, the fixing device for the stripper guide of the plate rolling mill according to the first aspect of the present invention is a simple and easy-to-use air cylinder,
By providing the stopper and the link mechanism, it is possible to easily fix the stripper guide and release the fixation. Since there is no need to use a cotter, it is not necessary to manually attach and detach the cotter when exchanging the work rolls, so that the safety is high and the work roll exchange time can be reduced. Furthermore, the stripper guide fixing device of the present invention has a structure in which the warped steel plate during plate rolling has a structure in which an impact load colliding with the stripper guide acts on the stopper. Never leave the work roll.

In the present invention, the stopper of the fixing device of the stripper guide of the plate rolling mill according to the second aspect of the present invention has two configurations of a support portion and a cam-shaped stopper portion, and
By configuring the cam mechanism with the support part and the cam-shaped stopper part, the distance between the center of the rotation support shaft of the stopper and the contact surface of the cam-shaped stopper part with the tail end of the stripper guide can be easily adjusted. It is possible to do. Further, the cam mechanism makes it possible to prevent the fixing device of the stripper guide from being damaged even if the steel plate which has been turned upside down collides with the stripper guide during rolling.

[Brief description of the drawings]

FIG. 1 is a view showing a position of a stripper guide in a four-high rolling mill used in a first embodiment of the present invention.

FIG. 2 is a perspective view illustrating a fixing device of the stripper guide according to the first embodiment of the present invention.

FIG. 3 is a view for explaining a stopper and a link mechanism of the fixing device of the stripper guide according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating a stopper and a link mechanism of a fixing device for a stripper guide according to a second embodiment of the present invention;
Fig. A is a diagram illustrating a fixed state of the stripper guide, Fig. B is a diagram illustrating a cross section xx of the stripper of Fig. A, and Fig. C is a diagram illustrating another fixed state of the stripper guide. It is.

FIG. 5 is a diagram illustrating a position where a cam-shaped stopper portion of a stopper according to a second embodiment of the present invention abuts on a tail end of a stripper guide.

FIG. 6 is a view illustrating a stopper and a link mechanism of a fixing device of a stripper guide according to another embodiment of the present invention.

FIG. 7 is a diagram showing the position of a stripper guide in a conventional four-high rolling mill during plate rolling.

FIG. 8 is a diagram showing a fixed state of a conventional stripper guide.

FIG. 9 is a front sectional view of a conventional four-high rolling mill.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Conventional four-high rolling mill 2a Upper backup roll 2b Lower backup roll 3a Upper work roll 3b Lower work roll 4a Upper backup roll chock 5b Lower backup roll chock 5a Upper work roll chock 5b Lower work roll chock 5c Lower part of upper work roll chock 6 Upper stripper guide 6a Tip end of upper stripper guide 6b Tail end of upper stripper guide 6c Upper stripper guide shaft 7 Lower stripper guide 8 Entry guide 9 Air cylinder 9a Shaft hole at end of air cylinder 10 Stopper 11 Stopper (cam 12) Support frame for upper stripper guide 12a Lower shaft hole of support frame 13 Cylinder block 13a Cylinder block 14 Shaft hole of stopper 14 Rotary shaft of stopper (rotation support shaft) 15 Telescopic rod of cylinder 15a Shaft hole of distal end of telescopic rod of cylinder 16 Link rod 16a Shaft hole of link rod 16b Shaft hole of link rod 17 Rod 17a Rod shaft Hole 17b Shaft hole of rod 18 Support portion 18a Shaft hole in support portion 18b Shaft hole in support portion (shaft hole for rotation axis of cam-shaped stopper portion) 18c Groove in support portion 18d Flat surface of groove in support portion 19 Cam-shaped stopper portion 19a Shaft hole for rotary shaft of stopper part of cam-shaped stopper part 19b Shaft hole of cam-shaped stopper part 19c Plane of cam-shaped stopper part 19d Plane of cam-shaped stopper part 19e Lowermost end part of cam-shaped stopper part 20 Provided at support part Rotating shaft of the cam-shaped stopper portion 21 housing 22 pressing-down device 23 feed roller 24 backup roll support Pedestal 25 upper backup roll hanger 26 guide rod 27 guide rod sliding portion 28 cotter 29 reduction device 30 back-up roll support stand 31 feed rollers

Claims (2)

[Claims] 1. A stripper for a plate rolling machine, wherein a stripper guide for draining is rotatably provided on an outer periphery of a work roll of the plate rolling machine, and a leading end of the stripper guide is fixed at a position where the stripper guide slides on the outer periphery of the work roll. In the guide fixing device, both ends of the support frame are attached to the left and right chocks, cylinders are provided on the upper surface of the support frame, and the tail end of the stripper guide is brought into contact with the tail end of the stripper guide on the side opposite to the work roll, so that the end of the stripper guide is rolled. A stopper for slidingly contacting the outer periphery of the support frame is rotatably supported on a rotation support shaft provided on the side surface of the support frame, and the stopper and the telescopic rod of the cylinder are connected via a link mechanism. Characteristic is a stripper guide fixing device of a plate rolling mill. 2. The stopper according to claim 1, wherein said stopper is provided with a cam-shaped stopper for changing a distance between a center of said rotation support shaft and a contact surface to a tail end of said stripper guide by rotation in the same direction as said stopper. 2. The stripper guide fixing device according to claim 1, wherein said link mechanism is connected to said cam-shaped stopper portion.