Patent ID: 8408124

Claim:
A transport cylinder gripper pad height adjustment device comprising: a first notch formed in an outer peripheral portion of a transport cylinder in a cylinder axial direction; a gripper pad which is equipped in said first notch and grips a sheet in cooperation with a gripper; a gripper pad bar which includes said gripper pad fixed thereon, is restricted in movement in the cylinder axial direction and supported to be movable in a cylinder radial direction, said gripper pad bar having a bottom surface inclined with respect to the cylinder axial direction; a first adjusting bar which has an inclined upper surface in contact with said bottom surface of said gripper pad bar, and which is supported to be movable in the cylinder axial direction in said first notch; a biasing member which biases said bottom surface of said gripper pad bar against said upper surface of said first adjusting bar in a direction to bring said bottom surface into press contact with said upper surface; a drive shaft which is supported to be movable in the cylinder axial direction at the center of rotation of the transport cylinder; a driving unit which moves said drive shaft in the cylinder axial direction; a first connecting portion which is interposed between said drive shaft and said first adjusting bar, and moves said first adjusting bar in the cylinder axial direction as said drive shaft moves; a second notch formed in the outer peripheral of the transport cylinder so as to be 180° out of phase with said first notch in a cylinder rotation direction; a second adjusting bar which is supported to be movable in the cylinder axial direction in said second notch; a second connecting portion which is interposed between said drive shaft and said second adjusting bar, and moves said second adjusting bar in the cylinder axial direction as said drive shaft moves; bearings which are fixed to a slider and connect said slider, and said drive shall while supporting rotatably said drive shaft; wherein said first connecting portion and said second connecting portion comprise first racks formed on said drive shaft, second racks formed on said first adjusting bar and said second adjusting bar, and pinions which mesh with said first racks and said second racks; and wherein said driving unit comprises a motor driven in a forward/reverse direction, a threaded rod which rotates by interlocking, with rotation of said motor, and the slider which moves in the cylinder axial direction, together with said drive shalt, as said threaded rod rotates.