Elevator system

Application Number  00128355 Application Date  2000.11.24
Publication Number  1297842 Publication Date  2001.06.06
Priority Information   1999/11/26 JP 335466/99  
Applicant(s) Name  Hitachi, Ltd.  
Inventor(s) Name  Honta Atsuhisa;Inaha Hiromi;Kawabata Atsushi  
Patent Agency Code  31100 Patent Agent  shen zhaokun
AbstractIn order to make it possible to transmit and receive information between terminals and to reduce number of wires used for an elevator in a building in an elevator system by realizing the transmitting and receiving of information through wireless even if a very weak radio wave having a narrow communicable range is used, an elevator control unit, a car terminal and floor terminals are individually provided with short distant wireless transmitting/receiving units having a communicable range of nearly 2-floor distance (5 to 6 m) using very weak radio wave, and the radio wave is received and transmitted between the wireless transmitting/receiving units located within the communicable range to transmit information by a relaying method of sequentially transferring the information from the terminal to the terminal.