US 5,094,165 AGranted

Plate lockup apparatus for sheet-fed press

AssigneeKomori Corporation

InventorsHiroyuki Sugiyama, Toshio Miyamato, Kazuhiro Maejima

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Abstract

A plate lockup apparatus for a printing press includes a leading-side lockup device, a trailing-side lockup device, and a cam mechanism. The trailing-side lockup device is located in the gap of the plate cylinder and grips a trailing edge of the plate, the trailing-side lockup device having a lockup table and a gripper plate, each having a plate gripper surface extending in a radial direction of the plate cylinder. The lockup table and the gripper plate are connected to each other at non-gripping ends thereof through a shaft. The cam mechanism has a cam, a cam surface of which is in contact with the lockup table. The cam mechanism is operated such that at a start of pivotal movement of the cam, the plate gripper surfaces of the lockup table and the gripper plate are closed to grip the plate, and at an end of pivotal movement of the cam, the lockup table and the gripper plate are moved together in a circumferential direction of the plate cylinder to tighten the gripped plate.

Claims3

Dependent claims

In combination with a printing press of the type having a plate cylinder with a peripheral surface having a gap therein and a plate mounted to said peripheral surface, said plate having a leading edge and a trailing edge received in said gap, the improvement comprising:

leading- and trailing-side lockup devices for gripping said leading and trailing edges of said plate, respectively, when said plate is wound around said peripheral surface of said plate cylinder, said trailing-side lockup device having a cam shaft supported in said gap and each said leading- and trailing-side lockup device having a lockup table and a gripper plate, said cam shaft contacting said lockup table of said trailing-side lockup device so as to urge relative movement between said lockup table and said associated gripper plate of said trailing-side lockup device upon rotation of said cam shaft;
at lest one drive unit mounted adjacent said plate cylinder;
a link mechanism connected to said at least one drive unit;
lever pivot means supported at one end of said link mechanism opposite said at least one drive unit, said lever pivot means being angularly reciprocated upon movement of said link mechanism driven by said at least one drive unit, said lever pivot means having an opposite end;
and
a lever spaced from said opposite end of said lever pivot means and attached to one end of said cam shaft, said lever being pivoted by said lever pivot means.

3 more elements

Dependencies are inferred from the claim text.