| 摘要 |
PURPOSE:To improve safety by a method wherein an electrical control point is set in an open/closure drive motor and the speed is measured at every predetermined intervals of time so that the speed at present point of time is compared with the speed at previous point of time and if the latter is smaller than the former, the motor is stopped emergently. CONSTITUTION:A motor 1b is actuated upon a signal from a human body sensor 1j, and an electrical control device 2 provided with an operation unit 2b, encoder 2d, timer 2f for counting open/closure speed, memory 2i, and speed set device 2j is provided on an automatic open/closure door 1 for open/closure of a door 1g. And the number of pulses at every predetermined intervals of time (t) is measured and stored. A door open/closure speed M1 at the present point of time is compared with an open/closure speed M2 at a time (t) seconds before the present point of time and if M1<M2, it is recognized that there is an obstacle, so that the motor 1b is stopped emergently. And by making it possible to set open/closure speed of the door at multiple stages V0-V3, and by providing speed-falling sensing reference values B0-B4, wherein B0=0, the door 1g is prevented from being stopped unexpectedly by wind pressure or the like. By this method, safety can be improved. |
