| 摘要 |
<p>PURPOSE:To automatically adjust the speed of one of an upper mobile object and a lower mobile object to that of the other, to always and simultaneously make the both mobile objects travel at the same speed and to easily and precisely execute various works for transportation devices by transferring a speed control signal by radio between the ceiling-side transportation device and the floor-side transportation device. CONSTITUTION:At the time of making the upper mobile object 4 and the lower mobile object 43 travel oppositely and synchronously at the facing part of transportation lines 6 and 52, the moving speed of either one of the upper mobile object 4 and the lower mobile object 43 is detected, and the speed control signal is outputted from one transportation device 1 to the other transportation device 40 based on the detected value by radio. The other transportation device 40 receiving the speed control signal controls the shift speed of the other mobile object 43 based on the signal value and it is made to synchronously travel at the same speed as the mobile object 4.</p> |
