Alignment unit for sheet material

Abstract

The invention relates to an alignment unit for sheet material ( 1 ) which is upstream of the conveyor plane ( 9 ) for the sheet material ( 1 ). Feed of the sheet material ( 1 ) takes place via driven surfaces ( 33 ) which touch at least one side of the sheet material ( 1 ). The alignment unit ( 8 ) holds rotation elements ( 25, 38 ) which grip the sheet material ( 1 ) and which correct the offset of the sheet material ( 1 ) with reference to the direction ( 22 ) in which it is running. Of them, at least two rotation elements ( 25 ) which lie in one plane can be moved to the remaining rotation elements ( 38 ).

1 . Alignment unit for sheet material ( 1 ) which is upstream of the conveyor plane ( 9 ) for the sheet material ( 1 ) and feed of the sheet material ( 1 ) takes place via driven surfaces ( 33 ) which touch at least one side of the sheet material ( 1 ), wherein 
 the alignment unit ( 8 ) holds rotation elements ( 25 ,  38 ) which grip the sheet material ( 1 ) and which correct the offset of the sheet material ( 1 ) with reference to its conveyor direction ( 22 ), of which at least two rotation elements ( 25 ) which lie in one plane can be moved to the remaining rotation elements ( 38 ).    
     
     
         2 . Alignment unit as claimed in  claim 1 , wherein the feed acting on the sheet material ( 1 ) is produced by adjusting one pair of rotation elements ( 25 ,  38 ) which lies in one plane to the other pair of rotation elements ( 25 ,  38 ) at the time which lies in another plane.  
     
     
         3 . Alignment unit as claimed in  claim 2 , wherein a normal force on the sheet material ( 1 ) takes place by applying a spring force to a pair of rotation elements ( 25 ,  38 ) which lies in one plane.  
     
     
         4 . Alignment unit as claimed in  claim 1 , wherein the rotation elements ( 25 ) which touch the sheet material ( 1 ) are made as segmented rollers.  
     
     
         5 . Alignment unit as claimed in  claim 1 , wherein the segmented rollers ( 25 ) viewed in the direction  22  in which the sheet is running are arranged in successive pairs.  
     
     
         6 . Alignment unit as claimed in  claim 5 , wherein the segmented rollers ( 25 ) are driven by drives ( 27 ).  
     
     
         7 . Alignment unit as claimed in  claim 6 , wherein the drives ( 27 ) of the segmented rollers ( 25 ) are positioned in the first orientation ( 28 ) and in the second orientation ( 29 ) with respect to the direction ( 22 ) in which the sheet material ( 1 ) is running.  
     
     
         8 . Alignment unit as claimed in  claim 1 , wherein the counterpressure elements ( 38 ) which are provided underneath the conveyor plane ( 9 ) are held stationary on axles ( 44 ), while the segmented rollers ( 25 ) execute a displacement ( 42 ) to them.  
     
     
         9 . Alignment unit as claimed in  claim 1 , wherein the width ( 39 ) of the counterpressure elements ( 38 ) which are supported stationary exceeds that of the segmented rollers ( 25 ).  
     
     
         10 . Alignment unit as claimed in  claim 1 , wherein the counterpressure elements ( 38 ) are made as a common unit ( 43 ) which can be moved relative to the segmented rollers ( 25 ).  
     
     
         11 . Alignment unit as claimed in  claim 10 , wherein the width of the peripheral surfaces ( 45 ) of the counterpressure elements ( 38 ) corresponds to the width of the segmented rollers ( 25 ).  
     
     
         12 . Feeder for feed of sheet material ( 1 ), with an alignment unit ( 8 ) which is upstream of the conveyor plane ( 9 ) for the sheet material ( 1 ) and feed of the sheet material ( 1 ) takes place via driven surfaces ( 33 ) which touch at least one side of the sheet material ( 1 ), wherein the alignment unit ( 8 ) holds rotation elements ( 25 ,  38 ) which grip the sheet material ( 1 ) and which correct the offset of the sheet material ( 1 ) with reference to the direction ( 22 ) in which it is running, of which at least two rotation elements ( 25 ) which lie in one plane can be moved to the remaining rotation elements ( 38 ).  
     
     
         13 . Printing press with an alignment unit ( 8 ) for sheet material ( 1 ), which is upstream of the conveyor plane ( 9 ) for the sheet material ( 1 ) and feed of the sheet material ( 1 ) takes place via driven surfaces ( 33 ) which touch at least one side of the sheet material ( 1 ), wherein the alignment unit ( 8 ) holds rotation elements ( 25 ,  38 ) which grip the sheet material ( 1 ) and which correct the offset of the sheet material ( 1 ) with reference to its conveyor direction ( 22 ), of which at least two rotation elements ( 25 ) which lie in one plane can be moved to the remaining rotation elements ( 38 ).