| 摘要 |
The present invention relates to a movable type staircase which serves as an auto safety ladder for people to escape in case of fire, particularly denotes the one which is set at the exterior wall or veranda at various floor levels of a building used as a veranda or staircase in normal times. On emergency, a safety bar which is set beforehand in each floor of a building can be pushed aside to enable the movable staircase to unfold itself and connect rapidly by its own gravity with the veranda or fire exit at the lower floor level, and also by means of the impacsive force produced when the movable staircase is being lowered, the safety bar at the next lower floor level will be further pushed aside to again eanble the movable staircase to unfold itself and connect rapidly by its own gravity with another still lower floor level and so on, until the various floor levels which are lower than the floor which the user is staying can be connected automatically in a similar way as that which occurs to indoor staircase. It is a staircase which provides a highly safe and automatic means of escape for people at the time of emergency.
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