PURPOSE: To perform work-manufacturing and assembly-adjusting considerably readily, and avoid the occurrence of trouble at the time of paper delivery.

CONSTITUTION: The device includes a main shaft 5 and a group of front periphery grippers 10 formed integral with the main shaft 5 and aligned in the axial direction, wherein a front periphery gripper retaining bodies 6 being made arcuate in its external cross-section and a retaining discs 12 provided on both sides of the main shaft 5 are made rotatably adjustable with respect to the main shaft 5, and between the retaining discs 12, a group of rear periphery grippers 14 being aligned in the axial direction are provided. In the same way, rear gripper retaining bodies 11 are provided in which planar bodies 19 being made arcuate in its cross-section provided on the outer peripheries between the retaining discs 12 overlap on the outer peripheries of the front periphery gripper retaining bodies 6.