| 摘要 |
<P>PROBLEM TO BE SOLVED: To secure smooth operation of a cargo handling frame by changing the way of supplying a pressure liquid to lift cylinders in accordance with the load on a container. <P>SOLUTION: This container cargo handling vehicle includes: switching valves 47 and 48 formed to select a medium-speed circuit for supplying pressure oil to both lift cylinders 35 and 36 from a hydraulic pump 43 or a high-speed circuit for supplying the pressure oil only to one lift cylinder 36 from the hydraulic pump 43; pressure detecting switches 75-78 for detecting hydraulic pressure supplied to the lift cylinders 35 and 36 from the hydraulic pump 43; and a control part 70. The control part 70 allows the medium-speed circuit and the high-speed circuit to be formed when the hydraulic pressure detected by the pressure detecting switches 75-78 is less than a first threshold value when pulling up the container 2, allows the medium-speed circuit to be formed while prohibiting the high-speed circuit from being formed when the hydraulic pressure is the first threshold value or more and less than a second threshold value, and prohibits supply of the pressure oil to the lift cylinders 35 and 36 when the hydraulic pressure is the second threshold value or more. <P>COPYRIGHT: (C)2012,JPO&INPIT |
