Patent attributes
An elevator having an inner car suspended within an outer car, and which does not require the provision of mechanical room. A drive motor can be provided in one of rear side top, underside, and either side of the car. The invention has the following advantages. The vibration of inner car is reduced within an acceptable level for bringing a degree of comfort to passengers in the inner car while hoisting or lowering. The hoist ropes are prevented from slipping when a load of the car changes suddenly as in a case that many persons steps in or out of the car in a short period of time. An alignment of a bottom of the car with each of a plurality of levels is made possible when the elevator is stopped at each level. A manual escape device is provided for assisting passengers to escape in case of emergency.
