Cylinder throw-on/off apparatus and cylinder throw-on/off method for printing press

摘要

In a cylinder throw-on/off apparatus for a printing press, a cylinder throw-on/off motor is driven while the notch of a blanket cylinder (2) opposes the notch of a plate cylinder (1) to throw on/off the blanket cylinder (2) with respect to the plate cylinder (1), and driven while the notch of the blanket cylinder (2) opposes the notch of an impression cylinder (3) to throw on/off the blanket cylinder (2) with respect to the impression cylinder. A rotation phase detection unit (26,118,119) detects a rotation phase of the printing press. An accelerating unit (141) accelerates the printing press to a predetermined printing speed. A throw-on operation control unit (200,2001,2004) drives the cylinder throw-on/off motor, during or after acceleration to the printing speed, to control throw-on operation of the blanket cylinder (2) for the plate cylinder (1) and the impression cylinder (3). A motor drive amount calculation unit (142) obtains a drive amount of the cylinder throw-on/off motor, while controlling the throw-on operation of the blanket cylinder, in accordance with the rotation phase of the printing press detected by the rotation phase detection unit.