| 摘要 |
Stairs which, usually, under normal conditions, are gathered together inside a container 1 fixed at the top of the wall of a building. In the event of an emergency, when it is necessary to evacuate the building via the window or balcony of a floor, due to life-threatening events such as fire, collapse, etc., a cord or cable connected to the latch on a door 15 of the abovementioned container is pulled, the door opening instantly. Next, the stairs will extend vertically, under gravity, right down the wall and close to the windows or balconies from which people will be able to access the stairs without difficulty, climbing down them until they reach the ground. <IMAGE>
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