| 摘要 |
<p>PURPOSE:To simplify a construction and enable a reliable operation, by utilizing a revolving door, which always revolves downward, when cargoes are loaded onto a transport vehicle, such as truck etc., and by contructing it so that a cargo box lifter can work in conjunction with the revolution of the revolving door. CONSTITUTION:When a braking lever 24 is first operated in the case of cargoes being loaded onto a cargo box 4, a switch valve 23 breaks an auxiliary passage 22. When a revolving door 8 is revolved downward under such condition and a rear part of the cargo box 4 is opened, a switch 11 is turned on as a result of the door 8 contacting the switch 11, and a current flows to relay R. As a result, a relay switch r turns on, and a motor M starts to run. A pump 18 thus is driven, and an oil is fed to a hydraulic cylinder 15 through a main passage 20. A chassis frame 1 comes in proxity with a rear accelerator against a plate spring 2 due to the extension of the cylinder 15, and thus, the cargo box 4 is lifted down.</p> |
