DOOR LOCKING MECHANISMS FOR SECURITY ENCLOSURES

摘要

The strongroom door bolts connected to a drive strap (4) are thrown from the leading edge of the door by a crank pin (11) working in a drive slot (12) in the strap. Another drive strap (13) carrying top-edge bolts is driven from the strap through a bell crank (18). When the bolts are thrown a first lock (24) shoots a locking bar (28) to block the crank pin. In this position the bar both prevents rotation of the crank pin in the withdrawing direction and counteracts end pressure on the strap directly through the pin. A second lock pivots a locking device (32) so that a flange (32A) blocks withdrawal of the strap and its top surface (32B) blocks withdrawal of an abutment (34) welded to the strap. Live relockers block the retraction of the straps if the door is attached in certain ways. (First major country equivalent to PT--75104).