| 摘要 |
<p>PURPOSE:To freely carry out the raising/lowering and tilting operation of a floor part supporting frame by connecting a turning supporting arm between the first and second turning supporting points and installing a turning driving means which can be operated independently onto each turning rod. CONSTITUTION:Turning rods 2a and 2b and working arms 3a and 3b from which the turning rods 2a and 2b are projectingly installed are turned by advancing and retreating the driving rods 10a and 10b simultaneously or in single form in the longitudinal direction of a floor part supporting frame 1, and the supporting frame 1 can be raised and lowered or tilted. When the supporting frame 1 is raised, the driving rods 10a and 10b are advanced and retreated so that the working arm 3a is turned in the counterclockwise direction and the working arm 3b is turned in the clockwise direction. Since, in the raising process of the floor part supporting frame 1, a turning supporting arm 7 is connected with one 3a of the working arms 3, the working arms 3a and 3b shift in the longitudinal direction of a basic board 4 through turn, applied with the regulation by the turning supporting arm 7.</p> |
