Abstract: A suction unit in a sheet-fed rotary printing press includes a plurality of suction wheels, a plurality of supports, a drive shaft, a motor, a shaft, a coupling, a bearing, a sleeve, and a gear, and a knob and a screw. The suction wheels are provided below a sheet convey path to draw a sheet-like printing product in a slidable contact by suction. The supports support the suction wheels to be movable in a sheet convey direction. The drive shaft, motor, shaft, coupling, bearing, sleeve, and gear drive the suction wheels in the sheet convey direction. The knob and screw detachably fix the suction wheels to the supports. The suction wheels are connected to/disconnected from the drive shaft, motor, shaft, coupling, bearing, sleeve, and gear when the suction wheels are fixed to/released from the supports by the knob and screw.

Abstract: A sheet-like material guiding device of an offset printing press comprises a chain for holding and transporting a printed sheet; a product pile device for piling the printed sheet released from the chain; a suction device for reducing the speed of the printed sheet transported by the chain, the suction device being supported movably in the direction of transport of the printed sheet; and a belt disposed below the chain for guiding the printed sheet at nearly the same speed as the speed of transport of the printed sheet by the chain, the belt being movable so as to follow the movement of the suction device, the sheet-like material guiding device including a pair of driven rollers for supporting the belt, and a chain for supporting the driven rollers movably, with the distance between the driven rollers being unchanged. The belt can satisfactorily follow during movement of the suction device to achieve smooth transport, and a drive source for the suction device can be made small in capacity.