| 摘要 |
PROBLEM TO BE SOLVED: To provide a tank truck which can make the maintenance of a vapour valve simple and easy without needing entrance into a tank, apply to an air open/close type bottom valve and an upper part open/close operation type bottom valve commonly and unload even when the supply trouble of a pressurized air occurs in application to the air open/close type bottom valve. SOLUTION: In this tank truck, the open/close of the vapour valve 4 for collecting vapour B and the open/close of the bottom valve 2 for unloading can be interlocked by the interlock mechanism 47 provided with a joint 46 and rod 13. The joint 46 of such interlock mechanism 47 for transmitting a vertical movement and turning is not connected and fixed with the lower end of the upper shaft 6 of the vapour valve 4 side and by the turning of the upper shaft 6, they can be displaced to the relation engagingly lockable to the upper direction and the relation uncapable of the engagingly locking and released the engagingly locking.
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