Sheet-processing machine comprising at least one transport unit and method for the straight-tracking guidance of at least one conveyor belt of a sheet-processing machine

Abstract

In some examples, a sheet-processing machine includes a transport unit for transporting sheets. The transport unit includes a feed roller configured as an infeed roller and a feed roller configured as a diverting roller, which define a transport plane of sheets. At least two further feed rollers of the transport unit are arranged outside the transport plane. At least one feed roller of the at least two further feed rollers is configured as a pivoting roller that pivots and/or that can be pivoted about a pivot axis. The pivot axis of the pivoting roller is an axis that is normal of an axis of rotation of the pivoting roller, and the pivoting roller is configured to automatically pivot about the pivot axis.

1 - 63 . (canceled) 
     
     
         64 . A sheet-processing machine, comprising at least one transport unit ( 02 ) for transporting sheets, the at least one transport unit ( 02 ) comprising at least one feed roller ( 06 ) configured as an infeed roller ( 06 ) and at least one feed roller ( 07 ) configured as a diverting roller ( 07 ), which define a transport plane of sheets, at least two further feed rollers ( 08 ;  09 ) of the transport unit ( 02 ) being arranged outside the transport plane, at least one feed roller ( 08 ) of the at least two further feed rollers ( 08 ;  09 ) being configured as a pivoting roller ( 08 ) that pivots and/or can be pivoted about a pivot axis (S), and the pivot axis (S) of the pivoting roller ( 08 ) being an axis normal of an axis of rotation (R) of the pivoting roller ( 08 ), characterized in that the at least one pivoting roller ( 08 ) is configured so as to automatically pivot about the pivot axis (S). 
     
     
         65 . The sheet-processing machine according to  claim 64 , characterized in that the pivot axis (S) of the pivoting roller ( 08 ) is situated along an axis of rotation (R) of the pivoting roller ( 08 ) within a travel path of at least one conveyor belt ( 04 ) between a first end face and a second end face of the pivoting roller ( 08 ), and/or that both a starting position and at least one pivoted position of the at least one pivoting roller ( 08 ) are arranged within a plane perpendicular to the pivot axis (S) and/or that an opening angle of the pivot axis (S) of the pivoting roller ( 08 ) with respect to the transport plane is at least 40° (forty degrees) and no more than 140° (one hundred and forty degrees). 
     
     
         66 . The sheet-processing machine according to  claim 64 , characterized in that the at least one pivoting roller ( 08 ) has a cylindrical shape and/or that the at least one infeed roller ( 06 ) and/or the at least one diverting roller ( 07 ) and/or the at least one tensioning roller ( 09 ) have a cylindrical shape or at least one feed roller ( 06 ;  07 ;  09 ) of the feed rollers ( 06 ;  07 ;  08 ;  09 ) which differs from the pivoting roller ( 08 ) has a convex or conical shape. 
     
     
         67 . The sheet-processing machine according to  claim 64 , characterized in that the at least one transport unit ( 02 ) comprises at least one revolving conveyor belt ( 04 ). 
     
     
         68 . The sheet-processing machine according to  claim 67 , characterized in that, proceeding from the movement direction, pivoted with respect to the pivot axis (S) in a mathematically negative sense of rotation, the pivot axis (S) of the pivoting roller ( 08 ) has an angle of at least 0° (zero degrees) and/or of no more than 20° (twenty degrees) with respect to a movement direction of the at least one conveyor belt ( 04 ) entering the pivoting roller ( 08 ), or that, proceeding from the movement direction, pivoted with respect to the pivot axis (S) in a mathematically positive sense of rotation, the pivot axis (S) of the pivoting roller ( 08 ) has an angle of at least 0° (zero degrees) and/or of no more than 20° (twenty degrees), with respect to the movement direction of the at least one conveyor belt ( 04 ) entering the pivoting roller ( 08 ). 
     
     
         69 . The sheet-processing machine according to  claim 67 , characterized in that the pivot axis (S) of the pivoting roller ( 08 ) is situated parallel to the movement direction of the at least one entering conveyor belt ( 04 ) and/or that a wrap angle of the at least one conveyor belt ( 04 ) around the pivoting roller ( 08 ) is no more than 120° and/or at least 60° and/or that the at least one conveyor belt ( 04 ) is configured as a suction belt. 
     
     
         70 . The sheet-processing machine according to  claim 64 , characterized in that at least one feed roller ( 06 ;  07 ;  08 ;  09 ) of the feed rollers ( 06 ;  07 ;  08 ;  09 ) comprises grooves and/or microgrooves in the direction of rotation of the feed roller ( 06 ;  07 ;  08 ;  09 ), and that the grooves and/or microgrooves extend symmetrically from the center of the feed roller ( 06 ;  07 ;  08 ;  09 ) to its end faces. 
     
     
         71 . The sheet-processing machine according to  claim 64 , characterized in that at least one feed roller ( 06 ;  07 ;  09 ) of the feed rollers ( 06 ;  07 ;  08 ;  09 ) which differs from the pivoting roller ( 08 ) comprises a drive for driving the at least one conveyor belt ( 04 ). 
     
     
         72 . The sheet-processing machine according to  claim 71 , characterized in that the feed roller ( 06 ;  07 ;  09 ) comprising the drive for driving the at least one conveyor belt ( 04 ) has a cylindrical shape and/or that the at least one feed roller ( 06 ) configured as an infeed roller ( 06 ), which is arranged as the first feed roller ( 06 ) of the feed rollers ( 06 ;  07 ) along a transport path of sheets, or the at least one feed roller ( 07 ) configured as a diverting roller ( 07 ), which is arranged as the last feed roller ( 07 ) of the feed rollers ( 06 ;  07 ) along the transport path of sheets, or at least one further feed roller ( 09 ) configured as a tensioning roller ( 09 ), comprises the at least one drive. 
     
     
         73 . The sheet-processing machine according to  claim 67 , characterized in that at least one feed roller ( 09 ) of the at least two further feed rollers ( 08 ;  09 ) is configured as a tensioning roller ( 09 ), which differs from the further feed roller ( 08 ) configured as a pivoting roller ( 08 ), and is arranged upstream from the pivoting roller ( 08 ) in the movement direction of the at least one conveyor belt ( 04 ), that at least one tensioning device for tensioning the at least one conveyor belt ( 04 ) is provided outside the transport plane, that the at least one tensioning roller ( 09 ) is configured as an entering roller of the at least one tensioning device for tensioning the at least one conveyor belt ( 04 ), and that the at least one pivoting roller ( 08 ) is provided as an exiting roller of the at least one tensioning device. 
     
     
         74 . The sheet-processing machine according to  claim 67 , characterized in that at least one tensioning device for tensioning the at least one conveyor belt ( 04 ) is provided outside the transport plane, that the at least one tensioning device comprises at least one energy accumulator and/or that the at least one tensioning device is configured so as to pneumatically adjust and/or control the tensioning force against the at least one conveyor belt ( 04 ), and/or that the at least one tensioning device comprises at least one spring system ( 24 ) or at least one rocker arm ( 22 ) or at least one linear guide ( 23 ). 
     
     
         75 . A method for the straight-tracking guidance of at least one conveyor belt ( 04 ) of a sheet-processing machine, the at least one conveyor belt ( 04 ) being guided around at least one feed roller ( 06 ) configured as an infeed roller ( 06 ) and at least one feed roller ( 07 ) configured as a diverting roller ( 07 ), the at least one infeed roller ( 06 ) and the at least one diverting roller ( 07 ) defining a transport plane of sheets, the at least one conveyor belt ( 04 ) being guided around at least two further feed rollers ( 08 ;  09 ) of the transport unit ( 02 ) outside the transport plane, at least one feed roller ( 08 ) of the at least two further feed rollers ( 08 ;  09 ) configured as a pivoting roller ( 08 ) pivoting about a pivot axis (S), and the pivot axis (S) of the pivoting roller ( 08 ) being an axis normal of an axis of rotation (R) of the pivoting roller ( 08 ), characterized in that the at least one pivoting roller ( 08 ) pivots automatically about the pivot axis (S). 
     
     
         76 . The method according to  claim 75 , characterized in that the at least one pivoting roller ( 08 ) is pivoted about the pivot axis (S) by a belt tension of the at least one conveyor belt ( 04 ) and/or that the pivoting roller ( 08 ) pivots about the pivot axis (S) situated along an axis of rotation (R) of the pivoting roller ( 08 ) within the travel path of the at least one conveyor belt ( 04 ) between a first end face and a second end face of the pivoting roller ( 08 ) and/or that the at least one conveyor belt ( 04 ) is guided over the at least one cylindrical pivoting roller ( 08 ) and/or that both a starting position and at least one pivoted position of the at least one pivoting roller ( 08 ) are arranged within a plane perpendicular to the pivot axis (S). 
     
     
         77 . The method according to  claim 75 , characterized in that, proceeding from the movement direction, pivoted with respect to the pivot axis (S) in a mathematically negative sense of rotation, the pivot axis (S) of the pivoting roller ( 08 ) has an angle of at least 0° (zero degrees) and/or of no more than 20° (twenty degrees) with respect to a movement direction of the at least one conveyor belt ( 04 ) entering the pivoting roller ( 08 ), or that, proceeding from the movement direction, pivoted with respect to the pivot axis (S) in a mathematically positive sense of rotation, the pivot axis (S) of the pivoting roller ( 08 ) has an angle of at least 0° (zero degrees) and/or of no more than 20° (twenty degrees), with respect to the movement direction of the at least one conveyor belt ( 04 ) entering the pivoting roller ( 08 ), and/or that the at least one conveyor belt ( 04 ) wraps around the pivoting roller ( 08 ) at a wrap angle of no more than 120° and/or at least 60° and/or that an opening angle of the pivot axis (S) of the pivoting roller ( 08 ) with respect to the transport plane is at least 40° (forty degrees) and no more than 140° (one hundred and forty degrees). 
     
     
         78 . The method according to  claim 75 , characterized in that at least one feed roller ( 09 ) of the at least two further feed rollers ( 08 ;  09 ) configured as a tensioning roller ( 09 ), which differs from the further feed roller ( 08 ) configured as a pivoting roller ( 08 ), is arranged upstream from the pivoting roller ( 08 ) in the movement direction of the at least one conveyor belt ( 04 ), that the at least one conveyor belt ( 04 ) is tensioned by at least one tensioning device for tensioning the at least one conveyor belt ( 04 ), that the at least one tensioning roller ( 09 ) is configured as an entering roller of the at least one tensioning device for tensioning the at least one conveyor belt ( 04 ), and that the at least one pivoting roller ( 08 ) is provided as an exiting roller of the at least one tensioning device.