| 摘要 |
<p>PURPOSE:To provide a joint structure for vacuum double tubes, which is structurally simple and has a high heat insulating performance, and which is capable of being inexpensively manufactured. CONSTITUTION:Vacuum projecting parts 3 and 15, 16 are formed respectively at the closing end parts of vacuum double tubes 1,2. The space between the vacuum projecting parts 15, 16 is formed as an escape recessed part 21, in which the vacuum projecting part 3 formed in the other vacuum double tube 1 is positioned in non-contact manner. The area between the closing end parts formed at the edge parts of inner tubes 1a, 2a of the vacuum double tubes 1, 2 is sealed by a sealing member 23.</p> |
