Multiwall fire door and fire door leaf for the same

摘要

Fire door (10, 110) of multiple sheets with a first sheet (14, 114) fire door, to be rotatable about a first vertical axis, and a second sheet (18, 118) fire door, to be rotatable about a second vertical axis, so that the closed door firewall (10, 110), the leaves (14, 18; 114, 118) of fire doors are collected each other, wherein the leaves ( 14, 18; 114, 118) of fire doors are constructed by plates casing (26, 30; 126, 130) with a filling (34, 134) inside thereof, characterized in that at least one sheet of wrapping ( 26, 126) of the first sheet (14, 114) fire door and a sheet wrapper (30, 130) of the second sheet (18, 118) fire door are configured such that, in the closed position, grip behind one another or engage in another.