Device for decompression of fire-proof doors in tunnel, has drive with drive housing and drive rod, which runs out and into drive housing by activating drive from drive housing

摘要

The device has a drive (2) with drive housing and a drive rod, which runs out and into the drive housing by activating the drive from the drive housing. A counter bearing separated from the drive and loosely abutting an end of the drive rod in the initial position, has a signal emitter for determining whether a person is approaching a fire-proof door (1) or a person is operating the fire-proof door and for switching-on the drive. An independent claim is included for a fire-proof door for closing of door openings in tunnel.