| 摘要 |
PURPOSE:To make half-opening operations of an automatic door by starting the brak ing operation at a real braking point when the door is half opened, by calculating the braking point at the time of half opening and comparing the calculated braking point with a set running distance of the door at the lowest speed, and then, outputting the larger value. CONSTITUTION:When a door 3 is fully opened in a usual operating pattern, the opening operation is controlled by a main control circuit 5. In this case, when a braking signal is outputted, a counter 10 starts counting of a pulses P1 and counts the braking dis tance Ll when the door 3 is fully opened by counting the pulse number until the door 3 stops. The distance L1 is stored in a storage register 11. Then the opening width - distance (L2-L1) at the time of half opening is calculated and the braking point L3(L2-L1) at the time of half opening is outputted to a comparator 15. The comparator 15 com- pares the bracking point L3 with a previously set lowest-speed running distance L4 of the door 3 and the larger value is stored in a register 16, and thus, preparations are made for half-opening operations. When a switching signal is inputted in a control circuit 4, the real braking point in the register 16 is inputted in the main control circuit 5 and the door 3 makes high-speed opening operations to the real braking point and then controlled so as to make half-opening operations. |
