JPH0128882Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a clamping device for a rolling mill.

An outline of a conventional rolling mill will be explained based on FIG. 1 is a horizontal roll, and 2 is a roll yoke which rotatably supports both end shaft portions of the horizontal roll 1, and is inserted between a pair of posts 3 that are parallel to each other. 4 is a support block fixed to the outer surface of each post 3; 5 is a vertical shaft supported by each post 3 via a bracket 6; 7 is an arm rotatably supported by each vertical shaft 5; , each arm 7
The tip of the leg 8 is extended from the roll chock 2.
The support blocks 4 are opposed to each other with the support blocks 4 interposed therebetween.
9 is a connecting rod whose base end is connected to one arm 7 via a pin 10 and whose distal end fits into the notch 12 of the protrusion 11 of the other arm 7; 13 is a screw at the end of the connecting rod 9; This is a tightening nut that presses the tip of each arm 7 against the leg 8 by screwing into the section. 14 and 15 each have one end connected to block 4.
This is a spacer for adjusting the distance which is fixed to the arm 7 and the other ends thereof are in contact with each other.

According to the above conventional configuration, when replacing the horizontal roll 1, after loosening the nut 13, the connecting rod 9
rotate in the direction of arrow A, then rotate each arm in the direction of arrow B.
The horizontal roll 1 cannot be pulled out in the direction of arrow C unless it is rotated in the direction of arrow C, which takes time and effort. In addition, all clamping and unclamping work must be done manually, which is difficult. Furthermore, during operation of the rolling mill, the thrust force acting in the direction of arrow C is blocked only by the tightening force of the nut 13, making it unstable.

Therefore, the present invention provides a clamping device for a rolling mill that eliminates such drawbacks, and is characterized by a first clamping device rotatably supported on a vertical shaft supported by a roll yoke support post.
A second arm is provided, the tip of the first arm is opposed to the post across the leg extended from the roll chock, a key connecting the two arms is removably provided, and the tip of the second arm is provided with a removable key. A pressing means is provided for pressing the tip of the first arm against the leg via the key by pressing . According to this configuration, the horizontal roll can be easily replaced, most of the clamping and unclamping work can be performed automatically, and furthermore, the thrust force acting on the roll chock can be reliably blocked. It is possible.

Hereinafter, one embodiment of the present invention will be described based on FIG. 2 and the following figures. Reference numerals 20 and 21 indicate first and second arms, and the first arm 20 includes a pair of boss portions 20A rotatably fitted onto the vertical shaft 5, and an arm body extending horizontally from each boss portion 20A. 20B
and a connecting plate portion 20C that connects both arm bodies 20B to each other, and a second connecting plate portion 20C of the connecting plate portion 20C.
An engagement surface 20D is formed on the side edge facing the arm. The second arm 21 includes a boss portion 21A inserted between both boss portions 20A of the first arm 20 and rotatably fitted onto the vertical shaft 5, an arm main body 21B extending horizontally from the boss portion 21A, and an arm body 21B that extends horizontally from the boss portion 21A. Amen 20
A stepped portion 21 protruding from the boss portion 21A facing D
It consists of a C-shaped protrusion 21D. Reference numerals 22 and 23 are chips fixed to the tip of each arm body 20B and 21B. 24 is the engagement surface 20D and the protrusion 21
The prismatic key 25 inserted between the cylindrical key 25 and the cylindrical key 25 has a base end rotatably pin-coupled to the bearing 26 of the connecting plate portion 20C, and a tip end extending to the second arm 21. A connecting pin 28, which is a support rod and fits into an elongated hole 27 formed at its tip, is fixed to a connecting bracket 29 of the key 24. Reference numeral 30 denotes a support bracket protruding from the connecting plate portion 20C facing the center portion of the support rod 25; 31 is inserted into a through hole of the support bracket 30 and a through hole of the support rod 25 so as to be freely pulled out; A stopper pin 32 maintains a state inserted between the engagement surface 20D and the protrusion 21D, and 32 is a stopper pin whose one end is connected to the connecting fitting 33 of the connecting plate portion 20C and the other end is connected to the stopper pin 31. The support chain 34 is a pressing device disposed on the post 3 facing the second arm 21, and is composed of the following: 35 is a fixed block fixed to the post 3, and a horizontal roll 1 is mounted on the side of the fixed block.
An operating hole 36 is formed along a horizontal direction perpendicular to the drawing direction C. 37 is a sleeve disposed on the inner wall surface of the hole 36; 38 is a sliding hole formed perpendicularly to the operating hole 36 from a portion of the fixed block 35 facing the chip 23; 39 is the sliding hole 38; The sliding body is slidably inserted in the interior in the directions of arrows D and E, and has a square hole 40 formed at a location opposite to the operation hole 36, and a second arm on the inner surface of the square hole 40. The opposing surface is formed as an inclined surface 41. Reference numeral 42 denotes a stopper block which is slidably inserted into the operation hole 36 and the square hole 40 in the directions of arrows F and G, and the surface facing the inclined surface 41 is an inclined pressing surface 43. 44 is main body 4
A hydraulic cylinder 4A is fixed to a fixed block 35, and a piston rod 44B is connected to the stopper block 42 by a connecting rod 45, a pin 46, and a nut 47. 48 is an air vent hole.

The operation of the above configuration will be explained. The state shown by the solid line in FIG. 2 and in FIG.
The end face of the sliding body 39 is pressed against the chip 23.
As a result, the tip 22 of the first arm 20 is pressed against the leg portion 8 via the second arm 21 and the key 24. Therefore, the thrust force acting on the roll chock 2 in the direction of arrow C is reliably prevented. Next, when replacing the horizontal roll 1, the piston rod 44B of the hydraulic cylinder 44 is first reduced. Then, the pressed state between the inclined surface 41 and the pressing surface 43 is released, and the sliding body 39 moves slightly in the direction of arrow E. Next, when the stopper pin 31 is removed and the support rod 25 is pulled in the direction of arrow H, the key 24 is removed from between the engagement surface 20D and the protrusion 21D, and the connection between both arms 20 and 21 is released. Next, the first arm 20 is rotated in the direction of arrow I to bring it into the state shown in the imaginary line in FIG. 2, and the roll chock 2 is pulled in the direction of arrow C.

Next, after replacing the horizontal roll 1, if you want to return to the clamped state, use the key 2 by reversing the steps above.
4 is inserted between both arms 20 and 21, the piston rod 44B of the hydraulic cylinder 44 is extended, and the end surface of the sliding body 39 is pressed against the second arm 21 by the pressing surface 43.
It is only necessary to press it against the chip 23 of.

As described above, according to the clamping device for a rolling mill of the present invention, with the first and second arms connected using the key, the clamping state can be achieved simply by pressing the tip of the second arm using the pressing means. Furthermore, the unclamped state can be achieved simply by releasing the pressing by the pressing means, removing the key, and releasing the connection between both arms.
Therefore, most of the clamping and unclamping operations can be performed automatically, the rolls can be easily replaced, and thrust force acting on the roll chocks can be reliably prevented.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a conventional example. Figure 2 and the following figures show one embodiment of the present invention, in which Figure 2 is a partially cutaway plan view, Figure 3 is a horizontal sectional view of the main part, and Figure 4 is a horizontal sectional view of the main part.
The figure is a perspective view showing the relationship between the first and second arms and the key. 1...Horizontal roll, 2...Roll check, 3
...post, 5...vertical axis, 8...leg, 20...
First arm, 21... Second arm, 24... Key, 34... Pressing device (pressing means), 39... Sliding body, 42... Stopper block, 43... Pressing surface, 44... Hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] First and second arms rotatably supported on a vertical shaft supported by a roll chock support post are provided, and the tip of the first arm is opposed to the post with the leg extended from the roll chock sandwiched therebetween; A removable key connecting both arms is provided,
A clamping device for a rolling mill, characterized in that a pressing means is provided for pressing the tip of the first arm against the leg via a key by pressing the tip of the second arm.