JP2651977B2 - Roller guide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller guide in which a roller holder is supported by a guide box so as to be openable and closable.

[0002]

2. Description of the Related Art In a guide device disclosed in Japanese Patent Application Laid-Open No. 58-116921, a pair of roller holders are pivotally supported on a guide box so as to be openable and closable by fulcrum pins, and are arranged back to back on the guide box. A technology is disclosed in which a rear end portion of a roller holder is pressed by a piston rod of a hydraulic cylinder, and a rolled material is guided by a pair of left and right guide rollers that are pivotally supported on the front end portion of the roller holder.

[0003]

According to this prior art, the distance between a pair of left and right guide rollers axially supported at the tip of the roller holder can be adjusted to the center distribution by expanding and contracting the piston rod. However, when the roller guide is mounted on a vertical rolling mill and used, it is necessary to mount the roller guide in a horizontal direction.If the roller guide is mounted in a horizontal direction, the tip of the roller holder disposed on the upper side is drooped by the weight of the guide roller. Therefore, there is a disadvantage that the interval between the upper guide rollers is reduced, and the guide rollers are not arranged at the position of the center distribution.

[0004] Further, even when the roller guide is mounted on a horizontal rolling mill and used, and there is no danger of the roller holder hanging down, a difference in the machining tolerance of the roller guide or the like causes the roller holder to fail. Even if the pressing force required for the opening / closing operation is not uniform between the left and right roller holders and similarly due to the structural difference of the hydraulic cylinder, the piston rods arranged back to back expand and contract evenly even when pressurized with equal hydraulic pressure. In some cases, it does not operate, and as a result, there is a disadvantage that the distance between the pair of left and right guide rollers is not adjusted to the center distribution.

An object of the present invention is to always guide the rolled material to the rolling rolls by always arranging the guide rollers at the center distribution.

[0006]

The roller guide according to the present invention is characterized in that a pair of roller holders which are opposed to the guide box and are pivotally supported by a fulcrum pin so as to be openable and closable are provided at the tip of each of the roller holders. A guide roller rotatably supported by a support shaft, a hydraulic cylinder having a piston held by the guide box and in contact with a rear end of each roller holder, and the roller holder A spring for constantly contacting the piston, a gear portion is provided for each of the pair of roller holders, and the gear portion rotates in conjunction with the roller holder around the fulcrum pin as an axis, The teeth of the two gears are in mesh with each other.

[0007]

[Action] A roller guide is attached to a vertical rolling mill,
When the required pressure is applied to the hydraulic cylinder, the piston is pushed out by the hydraulic pressure of the hydraulic cylinder, and the rear end of the roller holder that comes into contact with the piston is pushed out. The distance between certain guide rollers is reduced. In the reverse operation, if the hydraulic pressure applied to the piston is reduced from the required pressure, the piston is drawn into the hydraulic cylinder, and the interval between the rear ends of the roller holder abutting on the piston is reduced. Since the distance between the guide rollers is reduced, the distance between the guide rollers that are pivotally supported at the tip of the roller holder is increased.

[0008] Even when the force required to open and close the roller holder is different between the left and right, the pair of roller holders are gear-coupled by a gear portion so as to open and close in conjunction with each other. The roller holder opens and closes evenly.

Even if an equal hydraulic pressure is applied, the roller holders are connected to each other by a gear even if the movement amount is difficult to be uniform due to a difference in sliding resistance between the left and right pistons. The intervals between the guide rollers are opened and closed at the center distribution.

[0010]

An embodiment of the present invention will be described with reference to the drawings.
A pair of opposing roller holders 2 and 2 are attached to the guide box 1 so as to swing freely.
In each of the roller holders, fulcrum pins 3 and 3 are provided integrally, that is, fixedly, and the fulcrum pins are rotatably supported by the guide box. Also, the gear portions 4 having teeth are formed on the fulcrum pins 3 and 3, respectively.
4 are provided integrally, and the teeth of the two gears mesh with each other. Therefore, the pair of roller holders 2, 2
Are opened and closed simultaneously by interlocking with each other via gear units 4 and 4.

A guide roller 5 is rotatably supported by a support shaft 6 at the tip of the roller holder 2. At the rear end of the roller holder 2, a hydraulic cylinder 8 holding a piston 7 for adjusting the interval between the guide rollers 5 is provided. The tip of the piston 8 is in contact with the rear end of the roller holder 2. The rear end of the roller holder 2 is pulled by a spring 10 which is held and mounted between the roller holder 2 and the guide box 1 by mounting bolts 9 and always comes into contact with the front end of the piston 8.

In use, in a vertical rolling mill, guide rollers 5 are installed up and down as shown in FIG. 2. The upper and lower roller holders 2 are connected by a gear section 4 and simultaneously open and close. With such a configuration, the upper roller holder hangs down due to the weight of the guide roller 5,
It is prevented that the interval between the guide rollers is narrowed on one side with respect to the pass line.

Further, when a required hydraulic pressure is applied to the hydraulic cylinder 8 and the rolling material is guided by the guide roller 5, the sliding resistance of the pair of left and right hydraulic cylinders is different. Even if the left and right pistons 8 do not move the same amount even when hydraulic pressure is applied, the roller holders 2 that come into contact with the pistons are gear-coupled by the gear portion 4, so that the opening and closing amounts of both roller holders are automatically adjusted. Therefore, the distance between the guide rollers is always adjusted by the center distribution.

[0014]

According to the present invention, a pair of roller holders are gear-coupled to open and close in an interlocked manner, so that even if the roller guides are arranged laterally in a vertical rolling mill, the weight of the guide rollers is reduced. Even if the tip of the roller holder hangs down or the roller holders are individually pressed by the piston of the hydraulic cylinder, it is possible to prevent a difference in opening and closing amounts of the left and right roller holders due to a difference in sliding resistance and the like. Therefore, the interval between the guide rollers is always arranged at the center distribution, and the rolled material can be accurately guided to the rolling rolls. Further, the provision of the spring for always bringing the roller holder into contact with the piston allows the interlocking operation between the piston and the roller holder to be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a plan view of FIG. 2 showing one embodiment of the present invention.

FIG. 2 is a front view showing one embodiment of the present invention.

FIG. 3 is a side view of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide box 2 Roller holder 3 Support pin 4 Gear part 5 Guide roller 6 Support shaft 7 Piston 8 Hydraulic cylinder (hydraulic cylinder) 10 Spring

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Shoji Okada, Inventor, Shoji 13-12-12, Nishi-ku, Sapporo City, Hokkaido Inside Kotobuki Sangyo Co., Ltd. (72) Inventor Tadashi Kawamura, 13, Article 12-12-cho, Nishi-ku, Sapporo, Hokkaido No. 13 Inside Kotobuki Sangyo Co., Ltd. (72) Inventor Koji Nozue 18 Minamikamochi, Kagiya-cho, Tokai-shi, Aichi Prefecture (56) References: Japanese Utility Model Application Sho 61-266114 (JP, U) Japanese Utility Model Application Sho 62-123308 (JP, U)

Claims (1)

(57) [Claims] 1. A pair of roller holders which are opposed to a guide box so as to be openable and closable with fulcrum pins, and a guide roller which is rotatably supported by a support shaft at a tip end of each of the roller holders. If, Yes held in the guide box, and a hydraulic cylinder with a piston which is in contact with the rear end portions of the roller holder, the roller holder comprises a spring for constantly abut on the piston A gear portion is provided on each of the pair of roller holders.
There, the gear unit, the Roraho the fulcrum pin as axis
A roller guide which rotates in conjunction with a rudder, and wherein the teeth of the two gears are meshed with each other .