| 摘要 |
PURPOSE: An evacuation door for a tunnel is provided to effectively cut off the diffusion of toxic gas by automatically closing an opened swing door using an automatic closing device. CONSTITUTION: An evacuation door for a tunnel comprises a swing door(110), a rotator(120), and an automatic closing device(150). The swing door is fixed to be rotatable around a door shaft(111). The rotator is installed to be coaxially rotated with the door shaft and idled with the door shaft within a fixed rotation angle range. The automatic closing device supplies rotation power to the rotator to close the swing door. |
