Safety metallic cladding door for ancient building, has locking and framing sheet plates forming housing in which locking block is slidingly inserted, where framing plate has side with hole in which u-turn spring bolt of block is engaged

摘要

The door has a locking sheet plate with a U-shape presenting long and short branches. The plate is arranged along a vertical lateral side of a framing sheet plate so that the long branch is fixed on the framing plate`s bottom and the short branch is placed on a side opposite to the lateral side to form a vertical housing in which a locking block (19) is slidingly inserted. The lateral side has holes (25, 26, 27) aligned with bolts (21, 22, 23) of the block, where a u-turn spring bolt (22) and a hole (26) have a larger section such that the bolt (22) is engaged only in its associated hole.