| 摘要 |
PURPOSE:To facilitate the operation for changing tanks by detecting the discharging of this time and the discharging of the next time in accordance with discharging cycle numbers, controlling a discharge gate in accordance with the discharging number of this time and controlling a feeder in accordance with the discharging signal of the next time. CONSTITUTION:Cycle setters are provided to each of hoppers and the signals S21a-S25a thereof are inputted in accordance with cycle numbers to OR elements 56a, 57a.... According to the cycle number, the hopper to be discharged this time is determined by AND elements 80a, 81a... and the result thereof is transmitted through an OR element 92a as a gate opening control signal S4a. When this cycle number is decided, whether the same is discharging of the next time or not is checked by AND elements 86a, 87a... and the result thereof is outputted as a feeding signal S30a through an OR element 93a, and said signal is applied to the AND element 46a of a control basic circuit 41, whereby a feeder control signal S15a is created. Thus the tanks are changed simply by operating the change at least until one time before. |
