E - Fixed Constructions – 05 – F
Patent
E - Fixed Constructions
05
F
342/40
E05F 15/10 (2006.01) B66B 13/14 (2006.01) E05F 15/14 (2006.01) G05B 19/23 (2006.01)
Patent
CA 2022850
A method for controlling opening/closing of a door in an automatic door system comprises the steps of causing the door to conduct opening operation to its opening-stop limit by an initial opening signal transmitted after the power supply is put to work and the arrival of the door at its closing-stop point is confirmed, and measuring the opening stroke at that time; causing the door to conduct closing operation to its closing-stop point when it is stopped at opening-stop point and no opening signal is inputted, and measuring the closing stroke of the door at that time; computing the difference between the measured opening and closing strokes upon stopping of the door at its closing-stop point; and outputting a signal of abnormal condition if the difference is more than a preset value, or causing the door to conduct normal opening/closing operation if it is less than the preset value. Thus, the opening/closing operation of the door can be made at a high speed by a preset distance in the beginning of the whole stroke, and thereafter at a low speed.
Ohno Kenzo
Yoshida Yukio
Gowling Lafleur Henderson Llp
Ykk Corporation
LandOfFree
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