| 摘要 |
<p>PROBLEM TO BE SOLVED: To effectively correct difference of elevatable drive of right and left driving machines without using a synchronizing shaft, so as to smoothly move elevatably. SOLUTION: Between a pair of elevatable frames 3 arranged right and left and the end parts of a long load-carrying platform 5, driving machine controllers 21 are on the elevatable flames 3 side, the operation brackets 25 of the driving machine controllers 21 are on the load-carrying platform 5 side, respectively provided. When this driving machine controller 21 is operated, a driving machine 7 belonging to one elevatable frame 3 only is operated so as to elevatably move only the one elevatable frame, and when right and left both elevatable frames are returned to the ordinary state, they are controlled to automatically correct inclination of the device, so that the right and left both driving machines are normally operated.</p> |
