| 摘要 |
A printing unit of a printing press is composed of at least two frame parts, the position of at least one of which, relative to the other, can be changed. Cooperating ones of these frame parts are placed against each other along a common joining surface, in a first operational position. These frame parts are separated from each other in a second operational position. An interstice, that is partly defined by these frame parts, is formed between the separated frame parts in the printing unit. At least one of the cooperating frame parts is supported so that it is movable along an adjustment path. At least one sensor is provided and is usable to monitor the interstice. The sensor has orientation characteristics or a sensory range along the joining surface. A control unit is provided and is connected to the at least one sensor. At least one drive unit is assigned to at least one of the cooperating frame parts and is usable to change the frame parts from one operational procedure into the other operational procedure. A control element is arranged in a control system and is usable to supply power to the first drive unit that is controlled by the control unit in accordance with a signal which is supplied by the sensor that is monitoring the interstice. The control element is also able to activate the first drive unit and is controllable independently from the activation of the first drive unit. A functional position of the control element blocks a relative movement between the frame parts with that functional position being selected by the control unit. |
