Roll changing device in rolling mill

Abstract

In a rolling mill ( 101 ) with upper and lower drive motors ( 174 and 184 ) arranged oppositely to each other with respect to paired upper and lower work rolls ( 131 and 141 ), changing of the upper work roll ( 131 ) is carried out such that a changing carriage ( 400 ) is inserted from a lower drive motor side to a space in the rolling mill ( 101 ) provided by the lower work roll ( 141 ) extracted from the rolling mill ( 101 ) to an upper drive motor side, the upper work roll ( 131 ) being loaded on the changing carriage ( 400 ) and then extracted together therewith to the lower drive motor side.

What is claimed is:  
     
         1 . A roll changing device for a rolling mill comprising a pair of upper and lower work rolls ( 131  and  141 ) each with a motor-side end over which an adapter ( 134 ,  144 ) is fitted, said upper and lower work rolls ( 131  and  141 ) being driven by the upper and lower drive motors ( 174  and  184 ) through the roll-side universal joints ( 171  and  181 ), spindles ( 172  and  182 ) and motor-side universal joints ( 173  and  183 ), respectively, said upper and lower drive motors ( 174  and  184 ) being arranged oppositely with respect to said work rolls ( 131  and  141 ), said roll changing device comprising a changing carriage ( 400 ) which is inserted, upon roll changing operation of the upper work roll ( 131 ), from a lower drive motor side into a space in the rolling mill ( 101 ) provided by the lower work roll ( 141 ) extracted from the rolling mill ( 101 ) toward an upper drive motor side, the upper work roll ( 131 ) being loaded on said changing carriage ( 400 ) and then extracted together therewith from the rolling mill ( 101 ) to said lower drive motor side.