| 摘要 |
<p>An automatic horizontal positioning device for a load handling vehicle such as a truck crane, comprising sensing means for sensing tilting of the vehicle having a weight causing contacts of limit switches to close when the vehicle is tilted, magnet valves adapted to be operated in response to the sensing means to supply hydraulic pressure to head ends of vertical outriggers at the lowered portions of the vehicle, and pressure switches for changing over said magnet valves to shut off the hydraulic pressure to the head ends of the vertical outriggers when pressure in the head end chambers exceeds a predetermined value resulting from the abutment of the extended outriggers against the ground, whereby the vehicle body is always maintained in its horizontal position.</p> |
