CONNECTING STRUCTURE OF PASSAGES

摘要

PROBLEM TO BE SOLVED: To provide a passage connecting structure of blocks to each other capable of suppressing the cost using a simple constitution.

SOLUTION: When the passages (outlet 19 and connection hole 22) of a liquid tank 3 and a double pipe fitting block 14 to be coupled together are connected with each other, the connecting pipe parts 25a and 25b at the ends of a pipe fitting 25 having a flange part 25c at the periphery of the middle part in the longitudinal direction are pinched by the joining surfaces 3a and 14a of the liquid tank 3 and the double pipe fitting block 14 in the condition that they are inserted through an O-ring 100 to the open end of each passage and the flange part 25c is accommodated in a ring-shaped recess 22b provided in each block.

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