Locking facility for smoke and fire door keyholes comprises baseplate-fitted locking flap of weight to slide down guide grooves into keyhole sealed locking position.

摘要

A baseplate (4) fixed to the door panel (3) has an opening (5) for the key elements. Fitted to the baseplate is a locking flap (7) which drops down baseplate fitted guides (8.1,8.2) into the locking position under its own weight (7). The guides run at an angle towards the door plane so the flap drops into the locking position as required. The flap rides down guides in the form of grooves and the flap has a U-shaped housing (11) whose free leg ends terminate in bars (13.1,13.2) molded into place to engage the guide grooves (8.1,8.2). The guide grooves have stops (14.2) at their ends. The inside (15) of the housing has a sealing plate (17).