Handling carriage for the cylinder of a printing unit in a printing machine

A mobile handling carriage for a rotary roll in a printing unit of a printing machine, the mobile handling carriage comprising:

• a chassis configured to be mobile in a horizontal plane and driven in motion in a longitudinal direction of travel of sheet elements in the printing machine;
• a support member mounted on the chassis via a pantograph mechanism, the support member being configured to support and hold the rotary roll so that an axis of rotation of the rotary roll is oriented in a transverse direction, the transverse direction being perpendicular, in the horizontal plane, to the longitudinal direction;
• a first drive device configured to drive the support member in translation with respect to the chassis in a vertical direction;
• an actuator mounted on the support member and configured to collaborate with the rotary roll positioned a distance above the support member;
• a second drive device configured to drive the actuator in translation with respect to the support member, in the longitudinal direction;
• and
• a control circuit configured to control a first sequence including successively:
• a raising of the support member;
• a longitudinal translation of the support member in a first direction;
• a lowering of the support member;
• and
• a longitudinal translation of the actuator in the first direction.

A printing machine comprising:

• a rotary roll comprising first and second flanges fixed one on each side of the rotary roll, the first and second flanges comprising at least one bore which is off-axis with respect to an axis of rotation of the rotary roll;
• a printing unit;
• and
• a mobile handling carriage for the rotary roll, the mobile handling carriage comprising:
• a chassis configured to be mobile in a horizontal plane and driven in motion in a longitudinal direction of travel of sheet elements in the printing machine;
• a support member mounted on the chassis, the support member being configured to support and hold the rotary roll so that an axis of rotation of the rotary roll is oriented in a transverse direction, the transverse direction being perpendicular, in the horizontal plane, to the longitudinal direction;
• a first drive device configured to drive the support member in translation with respect to the chassis in a vertical direction;
• an actuator mounted on the support member and configured to collaborate with the rotary roll positioned a distance above the support member;
• a second drive device configured to drive the actuator in translation with respect to the support member, in the longitudinal direction;
• and
• a control circuit configured to control a first sequence including successively:
• a raising of the support member;
• a longitudinal translation of the support member in a first direction;
• a lowering of the support member;
• and
• a longitudinal translation of the actuator in the first direction, wherein
• the printing unit comprises two slides spaced apart in the transverse direction, the two slides coming to interfere with the rotary roll held on the support member during the lowering of the support member during the first sequence.