Komori Corporation

Takeaki Nakano

Kazunori Takeda

Kazuya Iyokawa

Yoshiyuki Ueno

A plate changing method and an apparatus for rotating all plate cylinders of a plurality of printing units by a drive device, and performing plate changing by plate changing unit provided in correspondence with the plate cylinders has an abnormality detection step of detecting presence or absence of a plate changing abnormality by detectors provided in correspondence with the plate cylinders, a step of stopping the drive device when the plate changing abnormality is detected in the abnormality detection step, a return step of controlling at least one of the drive device and the plate changing unit of a normal unit, other than an error unit in which the plate changing abnormality has been detected, in accordance with the status of progress of plate changing in the normal unit after the stop step, and an error elimination step of eliminating the plate changing abnormality in the error unit after the stop step.

Method and apparatus for plate changing in a plate cylinder of a printing press

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

Safety apparatus for rotary press

A plate replacing system has a cassette capable of accommodating a new printing plate. The cassette is held at a fulcrum supported by a frame. A front end of the cassette turns about the fulcrum, and can contact and be retracted from a plate cylinder. Inside the cassette, an automatic mounting mechanism including long and short links and an air cylinder is provided for deforming the new plate so as to make a leading edge of the new plate bend. There is a gripping support side surface of a gap in the plate cylinder, which is parallel to the bend while moving a holding member, such as suction pads, which holds the leading edge of the new plate, from a waiting position to an inserting position.

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Noda, Japan

Takeaki Nakano