JPH0699213A - Roller guide - Google Patents

Abstract

PURPOSE:To exactly guide a rolled stock between rolling rolls by constituting so that a pair of roller holders are engagedly opened/closed by gear connection. CONSTITUTION:Guid rollers 5 are vertically provided, upper and lower roller holders 2 are connected in the gear parts 4 and simultaneously execute opening/ closing motion. So, it is prevented that only one side of the interval between the guide roller is narrowed to the pass line by making the upper roller holder hang down due to the weight of the guide roller 5. And, in the case that the rolled stock is held/guided with the guide rollers 5 by applying the required oil pressure to hydraulic cylinders 8, even when, for example, the movements of the right and left pistons 8 are not equal in the case that equal oil pressure is added, on account of a difference between sliding resistances of a pair of the right and left hydraulic cylinders, the opening/closing amounts of both roller holders are automatically made equal because the roller holders 2 which are brought into contact with the pistons are connected with gears in the gear parts 4. So the interval between the guide rollers is always adjusted so as to be symmetric to the center.

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 rotatably supported by a guide box.

[0002]

2. Description of the Related Art In the guide device disclosed in Japanese Patent Laid-Open No. 58-116921, a pair of roller holders are pivotally supported by a fulcrum pin on a guide box so that they can be opened and closed, and the guide boxes are arranged back to back. A technique has been disclosed in which a rolling rod is tied and guided by a pair of left and right guide rollers that are axially supported by the tip of the roller holder by pressing the rear end of the roller holder with a piston rod of a hydraulic cylinder.

[0003]

According to this prior art, the distance between the pair of left and right guide rollers pivotally supported on the tip of the roller holder can be adjusted to the central distribution by expanding and contracting the piston rod. However, if the above roller guide is attached to a vertical rolling mill and used, it is necessary to install this roller guide sideways.If it is installed sideways, the tip of the roller holder located on the upper side will hang down due to the weight of the guide roller. Therefore, the distance between the upper guide rollers becomes narrow, and there is a drawback that the guide rollers are not arranged at the central distribution position.

Further, even when the roller guide is attached to the horizontal rolling mill and is used, and there is no fear that the roller holder may hang down, the roller guide may not be drooped due to a difference in machining tolerance. The pressing force required for opening and closing operations is not even between the left and right roller holders, and the piston rods that are arranged back to back expand and contract evenly even when pressurized with equal hydraulic pressure due to differences in the hydraulic cylinder structure. It may not operate, and as a result, the distance between the pair of left and right guide rollers is not adjusted to the central distribution.

An object of the present invention is to always arrange the intervals of the guide rollers in the central distribution so that the rolled material is accurately guided to the rolling rolls.

[0006]

A first feature of the roller guide of the present invention is that a pair of roller holders are axially supported in a guide box so as to be opposed to each other and can be opened and closed by a fulcrum pin. A gear part is provided that is linked to open and close integrally with each other.A guide roller is rotatably supported at the tip of the roller holder, and the rear end of the roller holder is held in a guide box. It is in contact with a piston provided in a hydraulic cylinder, and is provided with a spring for always contacting the roller holder with the piston.

[0007]

[Operation] The roller guide is attached to the 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 abuts this piston is widened. The distance between certain guide rollers decreases. In addition, if the hydraulic pressure applied to the piston is reduced from the required pressure in the reverse operation to the above, the distance between the rear end of the roller holder that is drawn into the hydraulic cylinder and abuts against this piston is reduced. Since the width is narrowed, the distance between the guide rollers pivotally supported on the tip of the roller holder is increased.

Even when the force required to open and close the roller holder differs between the left and right, the pair of roller holders are gear-coupled to each other by the gear portion so that the pair of roller holders can be opened and closed 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 the gear portion even if the movement amount is difficult to be equalized due to the difference in sliding resistance between the left and right pistons. The distance between the guide rollers is opened and closed according to the central vibration.

[0010]

Embodiments of the present invention will be described with reference to the drawings.
The guide box 1 includes a pair of roller holders 2 facing each other.
Is rotatably supported by a fulcrum pin 3. The pair of roller holders 2 are provided with a gear portion 4 integrally with the fulcrum pin 3 so that they can be simultaneously opened and closed by interlocking with each other. The roller holders 2 are gear-coupled to each other through a gear portion 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 distance between the guide rollers 5 is provided. The front end of the piston 8 is in contact with the rear end of the roller holder 2. The rear end portion of the roller holder 2 is pulled by a spring 10 which is held by the mounting bolt 9 and stretched between the roller holder 2 and the guide box 1, and is always in contact with the tip portion of the piston 8.

In use, in the vertical rolling mill, the guide rollers 5 are installed up and down as shown in FIG. 2, but the upper and lower roller holders 2 are joined by the gear portion 4 and simultaneously opened and closed. Since it is configured as described above, the weight of the guide roller 5 causes the upper roller holder to hang down,
The distance between the guide rollers is prevented from becoming narrower on one side with respect to the pass line.

In addition, when a required hydraulic pressure is applied to the hydraulic cylinder 8 to guide the rolled material by the guide rollers 5, for example, since there is a difference in sliding resistance between the pair of left and right hydraulic cylinders, equal pressure is applied. Even if the left and right pistons 8 do not move the same amount even if hydraulic pressure is applied, the roller holder 2 that contacts the pistons is geared by the gear portion 4, so the opening and closing amounts of both roller holders are automatically adjusted. The distance between the guide rollers is always adjusted by the central distribution.

[0014]

According to the present invention, since the pair of roller holders are gear-coupled to each other to open and close in conjunction with each other, even if the roller guides are laterally arranged in the vertical rolling mill, the weight of the guide rollers is used. Even if the tip of the roller holder hangs down or the pistons of the hydraulic cylinders press the roller holders individually, it is possible to prevent the difference between the opening and closing of the left and right roller holders due to the difference in sliding resistance. Therefore, it is possible to always guide the rolling material to the rolling rolls by always disposing the guide rollers at the center distribution. Further, since the roller holder is provided with the spring for constantly contacting the piston, the linked operation of the piston and the roller holder can be smoothly performed.

[Brief description of drawings]

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

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

FIG. 3 is a side view of FIG.

[Explanation 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

Front Page Continuation (72) Inventor Yoshiaki Yamaguchi 13-12-12, cold, Nishi-ku, Sapporo-shi, Hokkaido Within Kotobuki Sangyo Co., Ltd. (72) Shoji Okada, 12-12-13 cold, Nishi-ku, Sapporo-shi, Sapporo, Hokkaido Sangyo Co., Ltd. (72) Inventor Tadashi Kawamura 13-12-12 cold, Nishi-ku, Sapporo-shi, Hokkaido Kotobuki Sangyo Co., Ltd.

Claims (1)

[Claims] 1. A pair of roller holders opposed to the guide box and pivotally supported by a fulcrum pin so as to be openable and closable, and a gear portion gear-coupled to open and close the pair of roller holders in an interlocking manner. A hydraulic pressure equipped with a guide roller rotatably supported by a support shaft at the tip of each roller holder, and a piston held in the guide box and in contact with the rear end of each roller holder. A roller guide comprising: a cylinder; and a spring for constantly contacting the roller holder with the piston.