Plate lockup apparatus for printing press

Abstract

A plate lockup apparatus for a printing press includes a plate lockup table, a gripper plate, a spring member, an actuating member, a cam shaft, and an adjusting member. The plate lockup table is located in a gap of a circumferential surface of a plate cylinder and extends in an axial direction of the plate cylinder. The gripper plate is pivotally supported on the plate lockup table such that its gripper surface opposes to contact a gripper surface of the plate lockup table and extends in the axial direction of the plate cylinder. The spring member biases the gripper plate in a plate releasing direction. The actuating member is fixed on the gripping plate and extends in a radial direction of the plate cylinder. The cam shaft extends along the actuating member to be pivotal in the axial direction of the plate cylinder, such that its cam surface opposes to contact the actuating member to swing, by cooperation with the spring member, the gripper plate in the plate gripping direction and a plate releasing direction with respect to the plate lockup table through said actuating member. The adjusting member acts on the actuating member to adjust a relative position between the gripper surfaces.