E - Fixed Constructions – 05 – F
Patent
E - Fixed Constructions
05
F
364/26, 342/40
E05F 15/20 (2006.01) B66B 13/26 (2006.01) E05F 15/14 (2006.01)
Patent
CA 2030768
By this method and the device, a protection against being caught, which responds by constant force values up to the last millimetres of a door closing movement, is offered for an automatic door, in particular in the case of lifts with regulated door drive which moves door leaves of a cage door by means of a motor with intermediate gear and mechanical drive and door leaves of a shaft door by way of mechanical coupling members. In that case, one so proceeds that a regulating error dV during the door closing travel is continuously compared with a maximum permissible regulating error dV max produced by a target value generator (3.5) and a door stop with subsequent reversing takes place on it being exceeded. The keeping-constant of the response values for an external interference force (3.9) is achieved thereby, that a learning travel computer (3.11) during periodic learning travels determines values for mass compensation (3.12) and values for friction compensation (3.13) and conducts these values as compensation value V k to a second comparator (3.2). Thereby, in the case of defined amplification of the regulator (3.8) and known torque characteristic of the direct current motor (2.1), the magnitude of an external interference force (3.9) is also known or measurable exactly, which creates the prerequisite for a secure protection against being caught.
Ag Inventio
Riches Mckenzie & Herbert Llp
LandOfFree
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