| 摘要 |
<p>A printing plate changing device prevents a new printing plate (1) from being damaged even if an abnormal attachment has occurred during/before attaching the printing plate (1) on a plate cylinder (13). Various sensors detect a rear end of the new printing plate (1) located near an extrusion member (223) when a phase of the lower plate cylinder (13) forwardly rotating is positioned at a predetermined position, an actuator (219) of the lower printing plate holding device (210) is extended by a control device in accordance with a signal from the sensors to release a hook (225) from an engaged pin (229). A claw portion (225a) is rotated by force energized by a spring (226) to advance into a stored portion (216a) . The claw portion (225a) of the hook (225) is engaged with the rear end of the new printing plate (1) so that the new printing plate (1) can be returned into the stored portion (216a) by extending the actuator (219).</p> |
