| 摘要 |
PURPOSE:To exercise travelling control over a self-travelling dolly properly and exactly by transmitting an identification signal from a dolly stopped at a prescribed position and stopping automatically the succeeding dolly based on the detection of a proximity sensor. CONSTITUTION:When a dolly 1 at the top has detected an iron piece 14b for stop and stopped, a pickup coil 11c of an antenna 11 is set, and the information is transmitted to a CPU4 on ground via a reception wire AW. When a request signal for the identification signal is transmitted from the CPU4 to an operating command signal line FE, the identification signal is transmitted from the dolly 1 through the coil 11c. A proper command is given to the dolly 1 at the top from the CPU4 by receiving the said signal. A succeeding dolly 1 approaching the stopped dolly 1 has an ultrasonic wave sensor 13 before its car body 1a and when they have approached to a distance of nearly 2m with each other, the succeeding dolly 1 stops automatically. |
