| 摘要 |
The invention relates to installations of the staircase type making it possible to move up or down from one level to another by means of fixed steps, and to those of the inclined-plane type used for the same purpose. The device is a staircase-plane made up of two strings 1 supporting a flight of steps 2 which can pivot along their longitudinal shaft 7 mounted on ball bearings 8 via a connecting rod 6 joining them all by means of arms 4 and 5 so that they form an inclined plane in a manner resembling scales. The system is actuated either manually by a lever coupled to a main arm, or electrically by a motor. A safety system will dissuade people from using the device while it is being converted. Among the more advantageous applications of the invention, mention may be made of staircases in underground railways, in hospitals, in public services and in industry. <IMAGE> |
