Patent ID: 8087657
Filing Date: 2012-01-03
Classification: B65H,Y10S,Y10T

Abstract:
1. A sheet transport apparatus for transporting a sheet to a processing section having a processing position to process the sheet, comprising: at least one transport roller for transporting a sheet to the processing section at a predetermined velocity; a driving motor for driving the at least one transport roller; and a driving transmission mechanism for transferring driving of the driving motor to the transport roller, wherein the driving transmission mechanism comprises a rotary shaft for supporting the transport roller, a transmission rotary member having a circular fit hole, a holder member with a press-fit hole formed therein, the press-fit hole having a curved part and a flat part, and a coupling mechanism for coupling the holder member and the transmission rotary member, wherein the rotary shaft comprises a fitting part having a circular cross section at one end side on the rotary shaft to be fitted into the circular fit hole of the transmission rotary member, and a press-fit part having a curved part and a flat part press-fitted with the press-fit hole of the holder member, and wherein the coupling mechanism comprises a convex portion formed on a side of the transmission rotary member, and a concave portion formed on a side of the holder member press-fitted with the convex portion of the transmission rotary member.