| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that the breakage and defective connection of a connector tend to occur by the application of impact during the attachment/ detachment operation of a printing drum unit to perform the attachment/ detachment operation of the printing drum unit having considerable mass and the attachment/detachment operation of the connectors simultaneously and the problem that when a drum attachment/detachment lever swings delicately by vibration during the operation of a machine, etc., the electric connection between the connectors is made unstable, and the machine is stopped. SOLUTION: A freely swingable connector attachment/detachment lever 14 which is fitted to the printing drum unit 6 independent of the drum attachment/detachment lever 13 and moves a movable connector 11 between a connection position and a release position, an angular hole 8c which is formed in the unit 6 and holds the connector 11 at the connection position by engaging with the engagement part 15 of the lever 14 when the connector 11 occupies the connection position, and a spring 18 which biases the engagement part 15 in the direction of the engagement with the angular hole 8c are provided. |
