Printing cylinder assembly for a printing machine

A printing cylinder assembly for a printing machine, comprising:

• a rotating shaft pivotally supported at one axial end side thereof in a cantilever structure, wherein said rotating shaft is formed at the one axial end side thereof with a sleeve cylinder supporting tapered surface,
• a sleeve cylinder removably mounted on said rotating shaft so that the sleeve cylinder can be axially fitted on and extracted from the rotating shaft from the other axial end side of the rotating shaft, and
• a sleeve cylinder pushing member which is mounted on said rotating shaft at a side that is closer to said one axial end side of the rotating shaft than said sleeve cylinder supporting tapered surface and which is adapted to push said sleeve cylinder axially towards said other axial end side of the rotating shaft,
• wherein said sleeve cylinder is formed at one axial end side of an inner diameter portion thereof with a tapered surface,
• wherein the tapered surface of said sleeve cylinder is adapted to be fitted on and in close contact with the sleeve cylinder supporting tapered surface of said rotating shaft, thereby detachably coupling the one axial end side of the sleeve cylinder with the one axial end side of the rotating shaft, and
• wherein said sleeve cylinder pushing member comprises a rotor mounted on said rotating shaft so as to be rotatable about an axis orthogonal to said rotating shaft and a cam formed on the rotor, said cam having an arc-like cam surface off-centered from a center of the rotor whereby rotation of said rotor in a direction forces said cam surface to push one axial end face of said sleeve cylinder.