| 摘要 |
PURPOSE:To easily perform opening/closing operation by providing the first sensor which continuously generates an automatic operation signal by one shot action and the second sensor which successively outputs an automatic operation signal during the period an action. CONSTITUTION:When an optical sensor 6 is put in action, the second operation signal is inputted to a control unit 4, and when an optical sensor 8 is put in action, the first operation signal is inputted to the control unit 4. In case the optical sensor 6 is put in action after a valve body automatically opens a bib cock through putting the optical sensor 8 in action, if an opening/closing detec tion switch SW, has already finished detection of cock opening, the control unit 4 ignores rising of the second operation signal. Even if inputting of the second operation signal is then stopped during the period of cock opening, priority is given to the previous one shot-on of the optical sensor 8 by the control unit 4 and a condition of cock opening is maintained. When there is action of the optical sensor 8 again, a signal is given to a driving part 3 to close the valve body. |
