Door drive with device for emergency use consisting of electro-engine and gearing connected to emergency device using emergency current device

摘要

Door drive consists of electro engine and gearing, with emergency drive device which can be connected to it using an emergency current device. Emergency drive device consists of extra-low voltage engine, coupling and switch device to switch off the electro-engine intended for normal drive and to connect and switch on the extra-low voltage engine. In addition, the extra-low voltage engine has gearing to create a rotational speed slower than normal. An emergency current accumulator is present which can supply the coupling and the extra-low voltage engine by a simple switch connection.