Sheet guiding device and sheet processing apparatus including sheet guiding device

Abstract

A sheet guiding device includes: gripper bars provided to delivery chains and each having a holding portion configured to hold an end portion of a paper sheet, the gripper bars configured to transport the paper sheet along a paper sheet transporting route spaced away from a travelling route of the delivery chains; a delivery cylinder having a guide surface and configured to guide the transported paper sheet, the guide surface extending along an arc-shaped transporting route portion in the paper sheet transporting route which is located outside an arc-shaped travelling route portion in the travelling route of the delivery chains and which is formed by the holding portion travelling along the arc-shaped travelling route portion; a linear travelling route portion formed downstream of the arc-shaped travelling route portion in a travelling direction of the delivery chains; and a suction guide for guiding the paper sheet to an inner side than the linear travelling route portion, the paper sheet located in a region downstream of a shift position from the arc-shaped travelling route portion to the linear travelling route portion in a sheet transporting direction.

1 . A sheet guiding device comprising:
 a sheet holding device provided to a transporting chain, and having a holding portion configured to hold an end portion of a sheet, the sheet holding device configured to transport the sheet along a sheet transporting route formed by the holding portion and spaced away from a travelling route of the transporting chain;   a guide having a guide surface and configured to guide the transported sheet, the guide surface extending along an arc-shaped transporting route portion in the sheet transporting route which is located outside an arc-shaped travelling route portion in the travelling route of the transporting chain and which is formed by the holding portion travelling along the arc-shaped travelling route portion;   a linear travelling route portion formed downstream of the arc-shaped travelling route portion in a travelling direction of the transporting chain; and   guiding means for guiding the sheet to an inner side than the linear travelling route portion, the sheet located in a region downstream of a shift position from the arc-shaped travelling route portion to the linear travelling route portion in a sheet transporting direction.   
     
     
         2 . The sheet guiding device according to  claim 1 , wherein
 the guiding means includes sheet contact means which brings the sheet in contact with the guide surface of the guide which is located on an inner side than the linear travelling route portion, the sheet located in the region downstream of the shift position from the arc-shaped travelling route portion to the linear travelling route portion in the sheet transporting direction.   
     
     
         3 . The sheet guiding device according to  claim 2 , wherein the guide surface of the guide is formed in an arc shape and is a rotating body configured to rotate at a circumferential speed substantially equal to a transporting speed of the sheet transported by the holding portion in the sheet holding device travelling along the arc-shaped transporting route portion. 
     
     
         4 . The sheet guiding device according to  claim 3 , wherein the sheet contact means includes sucking means for sucking the sheet in a region of the arc-shaped guide surface downstream of the shift position in the sheet transporting direction. 
     
     
         5 . The sheet guiding device according to  claim 4 , wherein the sucking means sucks the sheet also in a region upstream of the shift position in the sheet transporting direction. 
     
     
         6 . The sheet guiding device according to  claim 2 , wherein the sheet contact means includes air blowing means for blowing air to the sheet. 
     
     
         7 . A sheet processing apparatus including the sheet guiding device according to  claim 1 , comprising a processing device configured to perform processing on the sheet on the guide surface of the guide extending along the arc-shaped transporting route portion.