Patent ID: 7992688

Claim:
A door device for an elevator, comprising: an elevator door that opens and closes an elevator doorway; a first door drive device having a first rotating shaft; a second door drive device having a second rotating shaft; a power transmission mechanism that couples the first rotating shaft to the second rotating shaft and moves the elevator door in response to rotation of the first and second shafts; and a door control device that controls movement of the elevator door and includes: a first processing device that performs first arithmetic processing for controlling the first door drive device; a second processing device that performs second arithmetic processing for controlling the second door drive device; and information transmitting means for transmitting information mutually between the first and second processing devices, wherein the first processing device includes a single processing section that performs part of the first arithmetic processing and calculates intermediate processing information, and a first individual processing section that processes the intermediate processing information to complete the first arithmetic processing, and the second processing device includes a second individual processing section that processes the intermediate processing information that is received through the information transmitting means to complete the second arithmetic processing.