Sicherheitseinrichtung für eine Rollenrotationsmaschine

摘要

A safety apparatus for a rotary press comprises a detector (20) disposed on a side of a plurality of printing units (1) in order to detect entry of a foreign object between the printing units, the detector (20) consisting of light projecting units (21a,22a) and light receiving units (21b,22b); a push button or switch (5) provided on the printing unit and pushed after completion of checking performed before initiation of automatic plate-replacing operation of the printing units (1); and control means for starting the automatic plate-replacing operation and detecting operation of the detector (20) when a predetermined time elapses after operation of the button (5).