Safety device for rotary printing press

Abstract

A safety device for rotary printing press is provided in which, if a blanket cylinder and a plate cylinder move a little larger, a gap between surfaces of the cylinders and guard member can be maintained to be less than a predetermined value and the function of safety protection is kept properly. In a safety device provided at the feeding side of an in-running nip formed by a rotary body in which the center of the rotation of the rotary body can be displaceable in position, the safety device comprising: a guard member 40 movably positioned in the vicinity of an outer circumferential surface of the rotary body; a guard member displacement means 1, 2, 3 positioned between the rotary body and the guard member for making the guard member displace in accordance with the displacement of the center of the rotation of the rotary body; and wherein a gap between the outer circumferential surface of the rotary body and the guard member is set to be substantially constant in spite of the movement or shift of the center of the rotation of the rotary body.

Dependencies are inferred from the claim text.