Closure servo control for fire-door with fixed and through-way leaves has swivel arms, two slide pieces, slide guide, door frame, thrust piece and spring-tensioned locking element,

摘要

The door comprises a fixed leaf and a through-way leaf each connected by a swivel arm with a door-frame. The swivel arm of the through door-leaf is fixed by a locking element (8) released from the fixed-leaf. A first slide-piece (9) is joined to the door-frame-side end of the swivel arm, and slides along a slide-guide (10) in the door frame. A second slide piece (11) is joined to the door-frame side end of the swivel arm of the fixed leaf and is movable along the slide-guide and has a thrust piece (12) engaging with and disengaging from, the locking element which is pre-tensioned by a spring towards its locking position.