Cleaning apparatus for impression cylinder of offset sheet-fed press.

摘要

An offset sheet-fed press is provided with a cleaning apparatus for an impression cylinder (1). The cleaning apparatus comprises cleaning unit (20) which includes a frame member (19), a magazine roll (5) provided with a spring brake (5a) for a cleaning cloth (4), a wind-up roll (6) for winding up the cleaning cloth (4) while stepwisely transferring the cleaning cloth (4) by a wind-up torque motor (6a), guide rolls (15a, 15b) for guiding the cleaning cloth (4) so that the cleaning cloth (4) faces the outer surface of the impression cylinder (1) between the magazine roll (5) and the wind-up roll (6), and a plurality of air cylinders (18) arranged in parallel and disposed on the rear surface side of the cleaning cloth (4) facing the impression cylinder (1). The cleaning unit further includes a cleaning cloth press assembly (23) provided with a linear press blade (16) linearlly pressing the cleaning cloth (4) against the impression cylinder (1) on the side of the magazine roll (5), a plate-like guide disposed on the side of the wind-up roll (6) and a surface press pad pressing the surface of the impression cylinder (1). The surface press pad (17) is disposed between the blade and the plate-like guide. The air cylinder (18) acts to move the cleaning cloth press assembly (23) along a substantially U-shaped guide so that the linear press blade (16) moves substantially on the radial line of the impression cylinder (1). <IMAGE>