Protective system of a pile lifting device for sheet piles in sheet-fed printing machines

US5284089A · kind A · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Helmut Buck · Schriesheim, DE
• Udo Ganter · Leutershausen, DE
• Christian Thomas · Walldorf, DE

Key dates

• Filing date: Feb 24, 1993
• Grant date: Feb 8, 1994
• Expiry date: Feb 24, 2013

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2801/21
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

Protective system of a pile lifting device for sheet piles in a sheet-fed printing machine, wherein a pile support board is liftable and lowerable in guides of a frame by a motorized drive of a lifting unit having a fast-speed and a slower speed operating condition for both the lifting and lowering, the pile support board and a sheet pile supported thereby, respectively, being drivable by the motorized drive to a position switch and into a collision region wherein it can collide with another machine part, including a control member operative between the pile support board or the sheet pile supported thereby, on one hand, and a machine part present in the collision region, on the other hand, the control member being articulatingly fastened in vicinity of the position switch or to the machine part in the collision region, and having switch elements arranged in at least two switching stages for controlling the lifting unit drive and being switchable via contact surfaces on the pile support board, a first plurality of the switch elements arranged in a first one of the switching stages and a second plurality thereof arranged in a second switching stage, the first plurality thereof being…