| 摘要 |
PURPOSE:To prevent forgetting to switch on a burglarproof circuit by automatically carrying current to the burglarproof circuit so as to be in working condition when the power switch of a door opening/closing control circuit is made off. CONSTITUTION:A door opening/closing control circuit 50 and a burglarproof circuit 25 are connected to a power source 22 through a changeover switch 17 which carries current to the burglarproof circuit 25 at cutting off the current- carrying to the door opening/closing control circuit 50. When a store is opened, the contact is on A position, current is fed to a door opening/closing control means 54 so as to be able to control opening/closing of door, and at the same time current feed to the burglarproof circuit 20 of a warning device unnecessary during the opening is cut off so as to be not in operating condition. When the store is closed and the doors are fastened, the contact is changed to B position so as to cut off current feed to the control means 54. Hereby, the door is made in non-operating condition while being in the closed condition, and current is fed to the burglarproof circuit 20 of the warning device necessary for burglarproofing, so as to be in operating condition. |
