Fire and smoke-proof door for closing door opening in tunnel section, has two door blades made of fire-proof material, connected pivotedly with door case, and aligned parallel to escape and rescue directions in opened position

摘要

The door has two door blades (2, 3), which are made of fire-proof material and are connected with each other. The door blades are connected pivotedly with a door case at a vertical axis (5), which runs between the door blades. A door closing unit moves the blades from an opened position to a closed position. The blades, in the opened position, are aligned parallel to escape and rescue directions. Locking units lock the blades with the case in the closed position. Sealants seal a gap between the blades and the case in the closed position against smoke passage.