| 摘要 |
PROBLEM TO BE SOLVED: To configure an anti-condensation circuit for an air cylinder system with the least possible trouble. SOLUTION: Two tube joints 10 and 11 are used. A double tube 12 is connectable to a body 21 of each tube joint 10, 11. The body 21 of each tube joint 10, 11 internally forms an outer passage connectable to a gap passage 23 of the double tube 12 and an inner passage connectable to an inner tube passage 24 of the double tube 12. Connection portions 25 are each connectable to a single tube or a port. A first check valve 51 is disposed in the outer passage of the tube joint 10 to allow only a flow from the gap passage 23 to a connecting passage 22, and a second check valve 52 is disposed in the inner passage of the tube joint 11 to allow only a flow from the inner tube passage 24 to the connecting passage 22.
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