KR20060005212A - Side guiding apparatus for centering rolling material - Google Patents

Abstract

The present invention provides a side guide device having a guide means for guiding a bar, which is a rolled material of a steel sheet, to a center of a transfer roller table or a bar rolling mill, wherein the guide means is provided to be in contact with both sides of the conveyed bar. And a pair of guide rollers having a cylindrical shape and guide roller driving means for imparting a forced rotational force to the guide rollers so as to correspond to the feeding speed of the conveyed bars, and instead of the conventional side guide plates. By adopting the guide roller which is forcibly rotated by it, it is possible to minimize the friction caused by the contact between the guide roller and the conveyed bar to improve the rolling quality and productivity.

Rolled Material, Centering, Guide, Roller

Description

Side guide device for rolling material centering {SIDE GUIDING APPARATUS FOR CENTERING ROLLING MATERIAL}

1 is a side guide device for centering a rolled material according to the prior art,

2 is a perspective view of a state in which a bar, which is a rolled material of a steel sheet, is transferred;

3 is a perspective view of a first embodiment according to the present invention;

4 is a perspective view of a main part of FIG. 3;

5a and 5b is a view for explaining the structure of the lifting and swing rotation, lowering of the roller guide frame arm of Figure 3,

5C is a perspective view illustrating a state in which the first embodiment of FIG. 3 is swinging,

6a to 6c are views for explaining a structure for adjusting the interval between the guide roller of FIG.

7a and 7b is a view for explaining the coupling of the guide roller and the guide roller driving means of FIG.

8a to 8c is a pneumatic circuit diagram of an air motor as the guide roller driving means of FIG.

9 is a perspective view of a second embodiment according to the present invention;

10 is a perspective view of an essential part of FIG. 9;

11A and 11B illustrate the coupling of the guide roller and the guide roller drive means of FIG. 9;

<Description of Symbols for Main Parts of Drawings>

100: feed roller table

203: main column 206: guide roller

208: roller guide frame 209: roller guide frame arm

210: sub column

401: Pinion Gear

402a: Driven Rack Gear 402b: Driven Rack Gear

403: hydraulic cylinder 403a: piston rod

501: air motor 601: pressure regulating valve

This invention relates to the side guide apparatus which can guide the bar which is the rolling material of a steel plate to the center of a transfer roller table or a bar rolling machine.

In general, the steel plate rolling process is to heat the slab supplied from the machine to the appropriate temperature, then to perform the width and thickness rolling in the rough mill, through the crop shear and finishing scale breaker, and then the final thickness rolling in the finishing mill to coil products To produce.

However, in the rolling process of the crude rolling mill, the bar 100 has a warpage (C) in the longitudinal direction of the bar 100 due to the left and right rolling unevenness during rolling and the temperature unevenness of the bar 100, and the like, as shown in FIG. 2. When the bar 100 on the transfer roller table 110 is transferred, the bar 100 enters the rolling mill in a crooked state due to non-uniformity such as the left and right levels of the transfer roller table 110. In order to solve the problem of equipment damage due to meandering of the 100, a guide device for rolling material centering is installed.

However, the conventional side guide device, as shown in Figure 1, the guide plate 11 is in close contact with the side of the bar 100 and the front and back to adjust the guide width to the width of the bar 100 to guide the guide A push bar 12 having one end fixed to the side surface of the plate 11 is provided, and a rack gear 13 is installed at the bottom of the push bar 12, and is provided between the left and right push bars 12. An electric motor 14 is connected to the drive shaft 17 supported by the gear box 15 and the bearing block 16, and pinion gears 18 are installed at both ends of the drive shaft 17 to provide the rack gear 13. And the pinion gear 18 rotates when the electric motor 14 is driven, and the push bar 12 is moved forward or backward while the engaged rack gear 13 linearly moves to raise the feed roller table 110. Passing bar 100 to the left and right around the center of the transfer roller table 110 The bar 100 is moved to the center line of the transfer roller table 110 through the guide plate 101 which is opened in the same manner.

However, in the side guide device as described above, when the amount of deflection (C) of the bar 100 is large, a large torque is applied to the motor 14 driving the guide plate 11. The centering operation of the bar 100 is not performed in the state of being caught, and thus the bar 100 is biased to the left and right so that the quality is not only reduced. In particular, since the guide plate 11 is operated on both sides of the front and rear, precise centering is performed. There was a limit to the work.

In addition, local wear of the guide plate 11 is caused by friction with the bar 100 passing while the fixed guide plate 11 is in contact, and the worn chip remains as debris on the upper or lower portion of the bar 100. When rolling, it remains as a surface flaw on the upper or lower surface of the bar 100, making it difficult to maintain good quality.

In addition, in the event of a malfunction, the bar 100 is normally pushed out of the transfer roller table 110 on the transfer roller table 110 while continuing the production work, although the malfunction of the bar 100 after cooling the bar 100 must be slowly processed. In the conventional side guide device, since the side guide plate cannot be moved, when the malfunction occurs, the bar 100 is cut on the feed roller table 110, and the hooking operation is performed by using a crane to perform the mishandling process. Had a problem such as holding a risk factor.

On the other hand, the prior art Korea Patent Application No. 10-2002-0045438 integrated in the present specification "side guide device for rolling material centering" (published No. 10-2004-0012081) to solve some of the above problems As in the past, it has a fundamental limitation by using the side guide plate as a guide means.

The present invention has been devised in view of the above-mentioned problems of the prior art, which are basically generated by using a side guide plate, and an object of the present invention is to provide a guide means for guiding a bar to be transferred to a center of a transfer roller table or bar rolling mill. The above problems are solved by adopting a guide roller which is forcibly rotated by the driving means.

In particular, it is an object of the present invention to bring the cylindrical guide rollers into contact with both sides of the bar to be conveyed, so that the friction between the guide roller and the conveyed bar is hardly generated while guiding the bar where the guide roller is conveyed to the center. .

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a side guide device having guide means for guiding a bar, which is a rolled material of a steel sheet, to a center of a transfer roller table or a bar rolling mill, wherein the guide means is a And a pair of guide rollers having a cylindrical shape provided to be in contact with both side surfaces, and guide roller driving means for imparting a forced rotational force to the guide rollers so as to correspond to the transfer speed of the bar.

In the above and hereinafter, the driving means is a device for generating a driving force by hydraulic pressure, pneumatic, electricity, manpower, etc., for example, a drive source such as a hydraulic motor, an electric motor, an air motor, and the like; In the concept of devices, such driving means can be adopted as those already known by those skilled in the art. In addition, the driving source may be considered to rotate or reciprocating elements in order to induce a rotational movement or linear motion of the driven device, the driving force of the drive source when the drive source is rotated and the driven device linearly or vice versa There is a need for a mechanical element that translates into motion of the driven device, and mechanical elements that simply transmit force are needed when the drive source rotates and the driven device rotates.

In the following embodiments, the guide roller driving means adopts an air motor system operated by compressed air.

Forced rotational force in the above and below means forcible rotation by a driving source such as the air motor 501, not passive rotation by contact with the bar 100, and when appropriate by the forced rotation Minimizes friction while maintaining

In the above, the guide roller driving means is

Including an air motor connected to the guide roller to provide a rotational force and a pressure control valve provided in the air supply line connected to the air motor to adjust the air pressure supplied to the air motor to set the driving force of the air motor It is preferable to make. As a result, the rotation of the guide roller can be adjusted according to the conveying speed of the bar to be conveyed, thereby minimizing wear to uneven wear which may occur on the guide roller due to friction with the bar, which prevents damage to the guide roller and of course wear. The generation | occurrence | production of a chip | tip can be suppressed and the quality of a steel plate can be aimed at.

In the above, the roller guide frame arm is provided at the upper or lower portion of the conveyed bar at right angles to the conveying direction of the conveyed bar, and a pair of roller guide frame arms to slide left and right along the roller guide frame arm. The roller guide frame is coupled to each other, the guide rollers are rotatably coupled to the roller guide frame, and roller guide frame driving means for adjusting the distance between the roller guide frames is preferably coupled to the roller guide frame. .

In the above, the roller guide frame driving means

A pinion gear internally rotatable to the roller guide frame arm,

A drive rack gear fixed to one of the roller guide frames and having a drive rack gear surface geared to the pinion gear on one side thereof, and fixed to another one of the roller guide frames and on the side of the pinion gear A driven rack gear having a driven rack gear surface geared with the pinion gear so as to be point symmetrical with the drive rack gear surface, the drive rack gear moving linearly along the roller guide frame arm; It is preferable to include a rack gear driving unit connected to the size gear to provide a driving force. As a result, the movement of the left and right guide rollers may be mechanically interlocked and driven at the same time, thereby inducing the bar to be accurately and quickly moved along the center line when entering the rolling mill.

In the above, the rack gear driving unit preferably comprises a piston rod, one end of which is connected to the drive rack gear, and a hydraulic cylinder into which the other end of the piston rod is inserted. As a result, when the guide roller receives a force exceeding a predetermined force by the bar 100, the piston rod is moved to open to the place where the guide roller receives the predetermined force, thereby preventing the guide roller from being overloaded. Not only damage or malfunction can be prevented, but also precise centering is possible.

In the above, one end of the roller guide frame arm is coupled to the main column provided at right angles to the roller guide frame arm, the linear drive means for providing a driving force to enable the vertical movement of the roller guide frame arm is the main column Or a swing driving means provided in the roller guide frame arm and providing a driving force so that the roller guide frame arm can swing around the main column, provided in the main column or the roller guide frame arm. And vertically moving and swinging the roller guide frame arm by a driving force of the swing driving means.

As a result, the interference caused by the structure of the side guide during the processing of the bar 100 and the maintenance of the transfer roller table 110 can be immediately moved to the outside space by the swing structure. Productivity can be improved by reducing time and maintenance interference.

In the above, the other end of the roller guide frame arm is coupled to a sub-column provided in parallel with the main column, a fixing portion for engaging with a point fixed to one end of the sub-column is formed, the fixing portion is the roller guide It is preferable to be fixed or disengaged from the fixed point according to the vertical movement of the frame arm.

In the above, the guide roller may be arranged in a horizontal direction with the bar so that the circumferential surface of the guide roller is in point contact with the bar.

In the above, the guide roller is preferably arranged in the vertical direction with the bar so that the original surface of the guide roller is in line contact with the bar. The guiding force applied to the bar 100 can be reduced while increasing the guiding force by the line contact, thereby smoothly performing the centering and reducing the defect of the bar 100.

Hereinafter will be described in detail the configuration and operation according to the first embodiment of the present invention.

Figure 3 is a perspective view of a first embodiment according to the present invention, Figure 4 is a perspective view of the main part of Figure 3, Figures 5a and 5b is for explaining the lifting and swing rotation, lowering structure of the roller guide frame arm of Figure 3 5C is a perspective view illustrating a state in which the first embodiment of FIG. 3 is swinging, and FIGS. 6A to 6C are views for explaining a structure for adjusting the distance between the guide rollers of FIG. 3, and FIG. 7A. 7B is a view illustrating the coupling of the guide roller and the guide roller driving means of FIG. 3, and FIGS. 8A to 8C are pneumatic circuit diagrams of an air motor that is the guide roller driving means of FIG. 3.

First, the swing rotation structure of the roller guide frame arm 209 will be described with reference to FIGS. 3 to 5C.

The main column 203 is rotatably supported on the main base frame 201 provided on one side of the feed roller table 110. The main base frame 201 is rotatably supported by the swing bearings 301a and 301b as shown in FIG. 5A.

According to the rotation of the swing motor 202 provided on one side of the main base frame 201 is attached along the circumference of the drive gear 302 and the main column 203 connected to the drive shaft of the swing motor 202 and the drive gear ( The main column 203 is rotated by the driven gear 303 geared with the 302.

As the main column 203 rotates, a swing frame having one end coupled with the main column 203 as one end of the roller guide frame arm 209 and the roller guide frame arm 209 coupled to the main column 203. 205 and the like swing around the main column 203.

At this time, in order for the roller guide frame arm 209 to swing, the server column 210 must be separated from the fixed guide 304.

The server column 210 is fixedly coupled to the left end of the roller guide frame arm 209 and is provided in parallel with the main column 203.

A fixing portion 210a is formed at the lower end of the server column 210 to be concave inward, and the fixing portion 210a is provided at an upper portion of the sub base frame 211 forming a fixed point. It consists of a shape corresponding to.

Therefore, when the server column 210 is lowered, the fixing portion 210a is lowered to be bitten by the fixing guide 304, thereby making it impossible to swing the roller guide frame arm 209, and when the server column 210 is raised, the fixing portion is The 210a is separated from the fixed guide 304 so that the roller guide frame arm 209 can swing swing by the driving force of the swing motor 202.

Hereinafter, the vertical movement structure of the roller guide frame arm 209 will be described with reference to FIGS. 3 to 5C.

The upper and lower feed motor 204 is provided on the upper portion of the main column 203, and the vertical feed motor 204 rotates the screw shaft 305 extending downward.

On the other hand, the swing frame 203 forming one end of the roller guide frame arm 209 is hollow and the main column 203 is inserted into the hollow, so that the swing frame 203 is only vertically along the main column 203. Guided to slide.

In addition, the screw shaft 305 penetrates the swing frame 203 and a screw nut 306 coupled to the screw shaft is fixed. Therefore, the screw shaft 305 is rotated in accordance with the rotation of the vertical feed motor 204, the swing frame 203 by the coupling of the screw shaft 305 and the screw nut 306 and the vertical movement guide of the main column 203. ) And the roller guide frame arm 209 and the sub-column 210 connected thereto are moved up and down.

Accordingly, the fixing part 210a formed in the sub column 210 is fixedly coupled to or released from the fixing guide 304 according to the forward rotation and the reverse rotation of the vertical feed motor 204.

Thus, the vertical movement and swing rotation of the roller guide frame arm are enabled by the driving force of the vertical feed motor 204 as the drive source of the linear drive means and the swing motor 202 as the drive source of the swing drive means, and thus the feed roller table 110 The roller guide frame arm and the guide roller 206 connected thereto can be immediately moved to the outside space when the bar 100 of the defective work occurring on the plate and the maintenance of the feed roller table 110 are performed. By eliminating the interference phenomenon caused by the guide means generated in the side guide device for rolling material centering due to the reduction of the processing time of the poor work material and the improvement of productivity by eliminating the maintenance interference factor can be expected.

On the other hand, the arrangement of the swing drive means and the linear drive means can be appropriately changed by those skilled in the art. For example, it may be envisaged to provide a means for moving the main column linearly and a means for rotating the main column after the roller guide frame arm is fixed to the main column.

6A to 6C are views for explaining a structure for adjusting the distance between the guide rollers of FIG. 3, FIG. 6A is a perspective view of a state where the upper lid of the roller guide frame arm is removed, and FIG. 6B is a distance between the roller guide frames. It is a state diagram for demonstrating this narrowing state, and FIG. 6C is a state diagram for demonstrating the space | interval between roller guide frames being expanded.

The pinion gear 401 is rotatably mounted inside the roller guide frame arm 209, and the drive rack gear 402a and the driven rack gear 402b are gear-coupled to both sides of the pinion gear 401. have.

A pair of roller guide frames 208a and 208b are coupled to the roller guide frame arm 209, and the roller guide frames 208a and 208b can slide along the roller guide frame arm 209.

Guide roller drive boxes 207a and 207b are provided below each of the roller guide frames 208a and 208b, and guide rollers 206a and 206b are supported by the guide roller drive boxes 207a and 207b, respectively.

The drive rack gear 402a and the driven rack gear 402b are fixed to either of the roller guide frames 208a and 208b, respectively.

One side of the drive rack gear 402a is formed with a drive rack gear surface for gear engagement with the pinion gear 401, and one side of the driven rack gear 402b has a drive rack centered around the pinion gear 401. A driven rack gear surface that is gear-coupled with the pinion gear 401 is formed to be point symmetrical with the size fish face.

The right side of the drive rack gear 402a is provided with a hydraulic cylinder 403 fixed to the roller guide frame arm 209, and the piston rod 403a operated by the hydraulic pressure of the hydraulic cylinder 403 is a drive rack size. It is connected to the right side of the fish 402a.

That is, one end of the piston rod 403a is connected to the drive rack gear 402a, and the other end is inserted into the hydraulic cylinder 403 to linearly move by hydraulic pressure.

Therefore, in FIG. 6B, when the hydraulic cylinder 403 pushes the driving rack gear 402a to the left through the piston rod 403a to rotate the pinion gear 401, the driven rack gear 402b connected to the pinion gear 401 is rotated. ) Moves to the right, and as a result, the distance between the roller guide frames 208 becomes narrow. FIG. 6C shows that the hydraulic cylinder 403 pulls the drive rack gear 402a to the right, resulting in widening of the distance between the roller guide frames 208.

The adjustment of the spacing between the roller guide frames 208 consequently means the adjustment of the spacing between the guide rollers 206 fixed thereto.

The transfer of the bar 100 to the center by the guide roller 206 is illustrated in FIG. 4.

In this embodiment, the guide roller 100 is disposed in the horizontal direction with the bar 100 so that the circumferential surface of the guide roller 100 is in point contact with the bar 100.

The guide roller 206 is wider by a certain amount than the actual width by the hydraulic cylinder 403 by receiving information on the actual width of the bar 100 to be transferred before the bar 100, which is a rolled material, is conveyed by the structure as described above. After waiting for the adjustment, the front end of the bar 100 is passed and readjusted to the same width as the actual width bar 100 is accurately guided to the center line of the transfer roller table 110.

On the other hand, if the bar 100 is bent (C) in the longitudinal direction and the excessive force is transmitted beyond the guiding force set in the guide roller 206, this force is transmitted to the hydraulic cylinder 403 to piston rod 403a ) Is moved until the set force is applied, and as a result, both guide rollers 206 are opened by the amount of warpage, so that the center of the bar 100 is always guided to the center line of the transfer roller table 110 at all times.

7A and 7B are views illustrating the coupling of the guide roller and the guide roller driving means of FIG. 3, and FIG. 7A is a perspective view of the guide roller 206, the guide roller drive box 207, and the air motor 501. 7B is a longitudinal cross-sectional conceptual view of FIG. 7A.

The guide roller driving means is forced to the guide roller 206 to match the rotational circumferential speed of the guide roller 206 in contact with the conveyed bar 100 in response to a change in the conveying speed of the conveyed bar 100. To give a rotational force. Here, the forced rotational force means rotation by a driving source such as the air motor 501, not passive rotation by contact with the bar 100.

The guide roller drive box 207 is a structure for transmitting rotational force between the air motor 501 and the guide roller 206, the drive gear 502, the bearings (503a, 503b) coupled to the rotating shaft of the air motor 501 It consists of a driven gear shaft 504 that is rotated and supported by the drive gear 502, the guide roller 206 is fixed to the one end of the driven gear shaft 504 by a fixing clamp 505. .

In order to minimize the friction generated between the guide roller 206 rotated by the air motor 501 and the bar 100 to be transported to reduce wear or uneven wear of the guide roller 2060 and to improve the flowability of the bar 100. 8A to 8C, a pressure regulating valve 601 for adjusting the air pressure supplied to the air motor 501 is provided.

The rotational force of the air motor 501 is adjusted by the pressure of the supplied compressed air, the pressure of the supplied compressed air is adjusted by the pressure control valve 601 provided in the air supply line, the set pressure is the pressure This can be confirmed by gauge 602.

At this time, the pressure of the compressed air is adjusted to minimize the inertia when the guide roller 206 rotates and stops, the rotation direction of the guide roller 206 is stopped in Figure 8a by operating the compressed air direction switching valve 603 , Forward rotation in FIG. 8B and reverse rotation in FIG. 8C are possible.

Since the compressed air discharged after driving the air motor 501 is discharged through the silencer 604, the amount of noise generated may be minimized.

On the other hand, in the roller side guide structure of the first embodiment, the contact between the bar 100 and the guide roller 206 rotated as shown in Figure 4 is made in point contact, when the guiding pressure is large, the guide roller 206 ) And the width of the bar 100 in contact with it may affect the quality.

That is, in the first embodiment, the circumferential surface of the guide roller 206 is rotated in point contact with the side surface of the bar 100, and the guiding pressure is a value obtained by dividing the guiding force by the contact area. In the first embodiment having the same and small contact area, the guiding pressure is high.

In order to solve this problem, a second embodiment according to the present invention is proposed.

The second embodiment is configured such that the guide roller 206 and the bar are in linear contact with each other, thereby increasing the contact area, and thus applying the same pressure to the conveyed bar 100 as in the first embodiment (i.e., the bar 100 The guiding force becomes stronger as the contact area becomes wider, while applying pressure to the extent that the width of) does not decrease.

FIG. 9 is a perspective view of a second embodiment according to the present invention, FIG. 10 is a perspective view of an essential part of FIG. 9, and FIGS. 11A and 11B are views illustrating a combination of the guide roller and the guide roller driving means of FIG. 9.

Hereinafter, a description of the same members as those in the first embodiment will be omitted, and only portions where differences from the first embodiment will occur will be described.

In the present embodiment, the guide roller 206 is disposed in the vertical direction with the bar 100.

Therefore, the circumferential surface of the guide roller 206 is not in contact with the bar 100, but the disc surface, which is formed at one side of the circumferential surface and forms a circular flat plate, is in contact with the bar 100.

At this time, the point where the guide roller 206 and the bar 100 are in contact with each other is preferably located as close to the circumference of the disk surface, it is preferable that the conveying direction of the rotary contact coincides with the traveling direction of the bar 100.

11A and 11B show that the bevel gear coupling of the first embodiment becomes unnecessary as the arrangement direction of the guide roller 206 is changed from the horizontal to the vertical direction, and the driving shaft of the air motor 501 is the coupling 801. ) Is directly connected to the driven shaft 802, and the driven shaft 802 supported by the bearings 803a and 803b is disposed in line with the center line of the guide roller 206.

The above embodiments are only preferred embodiments of the present invention, and the technical idea of the present invention may be variously changed or adjusted by those skilled in the art. If such changes or adjustments use the technical idea of the present invention, it is within the scope of the present invention. It belongs.

The present invention adopts a guide roller that is forcibly rotated by a driving means instead of the conventional side guide plate, thereby minimizing friction due to contact between the guide roller and the conveyed bar, thereby improving rolling quality and productivity.

Claims (9)

In the side guide apparatus provided with the guide means which guides the bar which is the rolling material of a steel plate to the center of a transfer roller table or a bar rolling mill, The guide means may include a pair of cylindrical guide rollers provided in contact with both side surfaces of the conveyed bar, and a guide roller driving means for applying a forced rotational force to the guide roller so as to correspond to the conveying speed of the conveyed bar. Rolling material centering side guide device characterized in that it comprises a. According to claim 1, wherein the guide roller driving means Including an air motor connected to the guide roller to provide a rotational force and a pressure control valve provided in the air supply line connected to the air motor to adjust the air pressure supplied to the air motor to set the driving force of the air motor Side guide device for rolling material centering, characterized in that made. The roller guide frame arm of claim 1, wherein a roller guide frame arm is provided at an upper portion or a lower portion of the conveyed bar at a right angle to the conveying direction of the conveyed bar, and slid left and right along the roller guide frame arm. A pair of roller guide frames are coupled, the guide rollers are rotatably coupled to the roller guide frame, and roller guide frame driving means for adjusting the distance between the roller guide frames is coupled to the roller guide frame. Side guide device for rolling material centering characterized in. According to claim 3, wherein the roller guide frame drive means A pinion gear internally rotatable to the roller guide frame arm, A drive rack gear fixed to one of the roller guide frames and having a drive rack gear surface geared to the pinion gear on one side thereof, and fixed to another one of the roller guide frames and on the side of the pinion gear A driven rack gear having a driven rack gear surface geared with the pinion gear so as to be point symmetrical with the drive rack gear surface, the drive rack gear moving linearly along the roller guide frame arm; Rolling material centering side guide device characterized in that it comprises a rack gear drive unit connected to the size gear to provide a driving force. The side guide for rolling material centering according to claim 4, wherein the rack gear driving unit comprises a piston rod having one end connected to the driving rack gear and a hydraulic cylinder into which the other end of the piston rod is inserted. Device. 5. The linear drive means according to claim 4, wherein one end of the roller guide frame arm is coupled to a main column provided at a right angle with the roller guide frame arm, and provides a driving force to allow the roller guide frame arm to move up and down. Swing drive means provided on the main column or the roller guide frame arm and providing a driving force to allow the roller guide frame arm to swing around the main column is provided on the main column or the roller guide frame arm. Rolling material centering side guide device characterized in that the vertical movement and swing rotation of the roller guide frame arm by the drive force of the linear drive means and the swing drive means. The method of claim 6, wherein the other end of the roller guide frame arm is coupled to a sub-column provided in parallel with the main column, and a fixing part is formed to be coupled to a fixed point at one end of the sub-column. Rolling material centering side guide device characterized in that the fixed guide or fixed engagement with the fixed point in accordance with the vertical movement of the roller guide frame arm. The side guide device according to any one of claims 1 to 7, wherein the guide roller is disposed in the horizontal direction so that the circumferential surface of the guide roller is in point contact with the bar. . The side guide according to any one of claims 1 to 7, wherein the guide roller is disposed in the vertical direction of the bar so that the disc surface of the guide roller is in line contact with the bar. Device.

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