CLAMPING DEVICE FOR ROLL BEARING BOX OF ROLLING MILL

PURPOSE:To make zero the clearance between a roll bearing box and housing with the smaller force and to improve the life of the bearing box by interlocking the output of a clatter-eliminating cylinder which makes zero said clearance to the output of a roll bending cylinder. CONSTITUTION:A piston 16 is movably incorporated freely forward and backward into the clatter-eliminating cylinder 12 and the oil entering the cylinder through an oil forde-feed port 17 pushes the piston 16 out of a chamber 18. Then the bearing box 6 is pressed to the other housing window 2' side by right and left blocks 9, 10 and the bearing box 6 and is surely bixed in a stand. An oil feed port 14 of the roll bending cylinder 11 and the oil port 17 of the cylinder 12 are communicated with each other at a branch point 19 so that always the same pressure is exerted thereto. The force exerted to the cylinder 12 increases as well when the force exerted to the cylinder 11 increases during rolling. The same holds true of the case in which the force decreases. More specifically, there is not need for exerting more than the necessary force to the cylinder 12. The life of the bearing box 6 and the block 9 is thus extended.