Post-processing device

A post-processing device comprising:

• a carrying roller configured to be rotated to carry a sheet one by one to a processing tray along a conveyance direction;
• a conveying member configured to convey the sheet carried by the carrying roller to a receiving position on the processing tray;
• a transporting member configured to transport a stack of the sheets conveyed by the conveying member from the receiving position to a folding position via a binding position on the processing tray;
• and
• a processing part including a binding part configured to bind the stack of the sheets at the binding position and a folding part configured to fold the stack of the sheets at the folding position,
• wherein the conveying member includes at least one first conveying member arranged at an upstream side of the processing part and at least one second conveying member arranged at a downstream side of the processing part in the conveyance direction on the processing tray,
• each of the first and second conveying members has a rotation shaft and a plurality of contact pieces protruding from the rotation shaft so as to come into contact with the sheet carried on the processing tray, the contact piece being made of elastic material,
• the conveying member is rotated at a rotation speed higher than a rotation speed of the carrying roller when the sheet carried by the carrying roller is conveyed to the receiving position on the processing tray, and
• the contact piece of the second conveying member has a length longer than the contact piece of the first conveying member.

A post-processing device comprising:

• a carrying roller configured to be rotated to carry a sheet one by one to a processing tray along a conveyance direction;
• a conveying member configured to convey the sheet carried by the carrying roller to a receiving position on the processing tray;
• a transporting member configured to transport a stack of the sheets conveyed by the conveying member from the receiving position to a folding position via a binding position on the processing tray;
• and
• a processing part including a binding part configured to bind the stack of the sheets at the binding position and a folding part configured to fold the stack of the sheets at the folding position,
• wherein the conveying member includes at least one first conveying member arranged at an upstream side of the processing part and at least one second conveying member arranged at a downstream side of the processing part in the conveyance direction on the processing tray,
• each of the first and second conveying members has a rotation shaft and a plurality of contact pieces protruding from the rotation shaft so as to come into contact with the sheet carried on the processing tray, the contact piece being made of elastic material,
• the conveying member is rotated at a rotation speed higher than a rotation speed of the carrying roller when the sheet carried by the carrying roller is conveyed to the receiving position on the processing tray, and
• a sheet conveyance force of the second conveying member is larger than a sheet conveyance force of the first conveying member.