Locking and safety device and a method for its operation

Abstract

Abstract 1. Locking and safety device for a door protecting an apparatus performing dangerous motion, wherein a push rod (16) belonging to a safety limit scanner (20) and springsbiased outwards and a locking bolt (3) belonging to a lifting magnet (6) and springbiased outwards by a further spring (5) are held in an axially slidable manner in a wall of the housing (2) of the device, characterised by the fact that a single or multi-part actuator (68) for the push rod (16) of the switch (20) having the locking aperture (68b) for the locking bolt (3), is mounted on the door in such a manner that a) the push-rod (16) through a cam (73a) of a pivotable switch piece (73), when the actuator (68) is held in the automatic inwardly directed position by a locking slide (74) holds the switch piece (73) against pivoting and that when the actuator (68) is inserted into the opening channel (78) the locking slide (74) is moved by the actuator (68) into a position in which it enables the switch piece (73) to pivot, and that on the further insertion of the actuator (68), the push rod (16) can slide into its outwardly directed basic position, and that b) the locking bolt (3) when the actuator (68) has been pulled out, is non-displaceable held by a locking lever (64) in the position into which it has been drawn out of the locking aperture (68b) while during the insertion of the actuator (68) into the opening channel (78) the locking lever (64) is moved into and held in a position in which the locking bolt (3) can be caused to lock into the locking aperture (68b) in the actuator (68) and the locking lever (64) automatically re-locks the locking bolt (3) when the actuator (68) is pulled out.

Inventors

• 👤 Berthold Kirschbaum

Bibliographic Details