Roller table roll, particularly for conveying furnace-heated metallic strip material

Abstract

The invention relates to a roller table roll used, in particular, for conveying furnace-heated metallic strip material, cast billets made of steel and the like. The roller table roll comprises a roll shaft ( 4 ) and a roll casing ( 1 ) that is mounted on the roll shaft ( 4 ) at least at the roll ends ( 2; 3 ). The aim of the invention is to prevent damages caused by electric currents and by sparking on the product surface. To this end, the roll casing ( 1 ) is mounted on the roll shaft ( 4 ) while being electrically and/or thermally insulated at least at the roll ends ( 2; 3 ).

1 . A roller conveyor roll, especially for the transport of furnace-heated metallic strip, continuously cast stands of steel or the like with a roller shaft and a roller shell or casing journaled at least at the roller ends on the roller shaft, characterized in that the roller shell ( 1 ) is journaled on the roller shaft ( 4 ) at least at the roller ends ( 2 ,  3 ) respectively with electrical and/or thermal insulation.  
     
     
         2 . The roller conveyor roll according to  claim 1  characterized in that between the roller casing or shell ( 1 ) at the roller ends ( 2 ,  3 ) and the roller shaft ( 4 ), respective individual insulating bodies ( 5 ) distributed over the periphery or annular insulating body ( 6 ) are provided.  
     
     
         3 . The roller conveyor roll according to  claim 2  characterized in that individual insulating bodies ( 5 ) or profiled rods ( 7 ) are distributed over the periphery.  
     
     
         4 . The roller conveyor roll according to one of  claims 1  to  3  characterized in that the profiled bars ( 7 ) together with bearing rings ( 11 ,  12 ) are axially secured relative to the roller shaft ( 4 ) and the roller shell ( 1 ).  
     
     
         5 . The roller conveyor roll according to  claim 4  characterized in that the axial retention is comprised of a sheet metal ring ( 17 ) welded on the ends ( 14 ,  15 ) of the bearing ( 16 ).  
     
     
         6 . The roller conveyor roll according to one of claims  4  or  5  characterized in that by means of the axial retention, a loose bearing ( 16   a ) and a fixed bearing ( 16   b ) are formed between the roller shell ( 1 ) and the roller shaft ( 4 ).  
     
     
         7 . The roller conveyor roll according to one of the  claims 1  to  6  characterized in that the insulating body ( 5 ) centers the roller shell or casing ( 1 ) on the roller shaft ( 4 ) and simultaneously forms the torque transmitting means.  
     
     
         8 . The roller conveyor roll according to one of the  claims 1  to  7  characterized in that the roller shell ( 1 ) is subdivided into a plurality of spaced apart roller shell segments ( 1   a ,  1   b ,  1   c ,  1   d ) arranged on the roller shaft  4  and centered with a plurality of insulating bodies ( 5 ) distributed around the periphery respectively and serving as drive torque transferring members.  
     
     
         9 . The roller conveyor roll according to  claim 1  characterized in that the insulating body ( 5 ) is configured as a conical bearing ( 18 ) whose conical inner ring ( 18   a ) and/or whose conical outer ring ( 18   b ) and/or whose conical rollers ( 18   c ) form respective insulating bodies ( 5 ).  
     
     
         10 . The roller conveyor roll according to  claim 9  characterized in that the conical inner ring ( 18   a ) is axially shiftable and adjustable under spring force on the roller shaft ( 4 ).  
     
     
         11 . The roller conveyor roll according to  claim 10  characterized in that the conical inner ring ( 18   a ) is axially shiftable on the roller shaft ( 4 ) by means of dished disk springs ( 19 ) which are braced against a shaft step ( 20 ) relative to the hollow conical outer ring  18   b  fixed with the roller shell ( 1 ).  
     
     
         12 . The roller conveyor roll according to one of  claims 8  to  11  characterized in that a roller shell segment ( 1   a ,  1   b , etc.) is respectively journaled at a roller end ( 2 ,  3 ) in a conical bearing ( 18 ) and substantially midway by means of insulating bodies ( 5 ) distributed around the periphery.