TRANSMISSION CONTROL SYSTEM FOR EMERGENCY ELEVATOR

PROBLEM TO BE SOLVED: To prevent an increase in the installation man-hour and wiring man-hour of a communication control circuit, and to uniform the design of landing display devices of a usual elevator and an emergency elevator. SOLUTION: Similar to the usual elevator, the emergency elevator employs the landing display device 10 incorporating the communication control circuit 13. In addition, a one-way transmission shutoff circuit 15 is further provided to function when a fire-fighting operation switch 9 is turned on. Even if water is poured over the landing call device 10 by the discharge of water in fire-fighting activity and an abnormal signal is sent to a serial transmission line 14 from the communication control circuit 13, the abnormal signal is not inputted to an elevator control device 3. On the other hand, a signal from the elevator control device 3 can be sent through the one-way transmission shutoff circuit 15. Therefore, a car position as important information for the fire-fighting operation is displayed on a car position display 12. COPYRIGHT: (C)2008,JPO&INPIT