| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tank structure that can securely detect a position shift of a seal member by airtightness test. <P>SOLUTION: A tank T includes a tank member 1 having an opening and a tube plate 2 fixed to the tank member 1 for filling the opening. A seal member 6 is arranged between a skirt part 11 formed at the opening of the tank member 1 and a groove part 21 formed in the outer peripheral edge part of a tube plate 2. Pressure welding of the seal member 6 is performed between the skirt part 11 and the groove part 21 by a tip folding piece 22 arranged on the outside sidewall of the groove part 21 of the tube plate 2. On the end face of the opening of the tank member 1 which comes into contact with the seal member 6, a ventilation groove 12 opened on the seal member side is formed along the entire periphery of the opening, and at least one consecutive passage 13 is formed for communication between the ventilation groove 12 and the inside of the tank member 1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
