Method for controlling opening/closing of door in automatic door

Details Method for controlling opening/closing of door in automatic door Method for controlling opening/closing of door in automatic door

1990-08-16

1991-03-12

Shoop, Jr., William M.

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318466, 49138, E05F 1514

Patent

active

049995510

ABSTRACT:
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 present 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.

REFERENCES:
patent: 4010408 (1977-03-01), Bailey
patent: 4203039 (1980-05-01), Pritchard
patent: 4300662 (1981-11-01), Hmelovsky
patent: 4342379 (1982-08-01), Games et al.
patent: 4515246 (1985-05-01), Kajiyama et al.
patent: 4563625 (1986-01-01), Kornbrekhe et al.
patent: 4742245 (1988-05-01), Yoshida et al.
patent: 4775823 (1988-04-01), Yoshida et al.
patent: 4870333 (1989-09-01), Itoh et al.

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