| 摘要 |
PURPOSE:To hold operation efficiency high by connecting a detector for the meeting or proximity of a leading dolly to a run stopping circuit, and another detector for those of a trailing dolly to a run driving circuit. CONSTITUTION:A dolly 2 is equipped with a detector (a) of bumper type detecting the meeting with a leading dolly or of an optical type detecting its proximity exceeding some extent, a stop mark detector (b), a stop button (c), a transmission button (d), a detector (e), such as a limit switch, detecting the meeting with a trailing dolly, a branch button (f), a photodetector (g) which receives light from the trailing dolly, a projector (h) emitting light to the leading dolly, a run stopping circuit A, a run driving circuit B, a brnach switching circuit C, etc. Then, the detector (a) is connected to the circuit A, and the detector (e) is connected to the circuit B. Thus, operation efficiency is held high while a trouble due to a congestion of the dollys is evaded. |
