FIELD: transportation.
SUBSTANCE: when power supply is cut off by energy store (6), closing motion (SB) of door leaf (4) is caused. By closing motion (SB) of door leaf (4), electric power is induced in door drive (12). When the power supply is cut off, door control system (16) is activated by means of induced electric power. By means of door control system (16), speed (V) of door leaf (4) is controlled. Also disclosed is a device for preventing excess speed of door leaf caused by the action of the energy store and an elevator door with such a device.
EFFECT: prevention of excessively high speed of door closing is achieved, the time of closing the door is reduced in case of power cut-off.
13 cl, 2 dwg
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