| 摘要 |
PURPOSE:To automatically keep car height at a set level by providing a leveling valve for cargo handling, a manually operated lever, a valve bar and a control arm projectedly provided through a clutch and of which end is rotatably secured to an axle through a link mechanism. CONSTITUTION:When 'cargo handling' of a cargo handling/running change-over switch 017 is selected in cargo handling, the air flow to a leveling valve 1 for running is cut-off, and car height is adjusted by operating the leveling valve 1 for cargo handling directly by means of a manually operated lever 5-3 instead of the UP/DWN operation of an elevator switch. After adjusting car height, since when a car height switch is turned on to select 'fitting' of a clutch 10, an arm 12 is fixed to the spool shaft 5 of the leveling valve 1 for cargo handling, car height is automatically kept at a set level regardless of the increase or decrease of loading weight by changing-over the leveling valve for cargo handling taking the fixing position of the arm 12 as a new neutral position. |
