| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-bolt joint structure capable of facilitating on-site operation and enabling flexible jointing. SOLUTION: The non-bolt joint structure is provided with a seal ring 303 interposed between a socket part 301a and a spigot part 302a to seal between them; an engagement face 344 provided on the inner peripheral face 316 of the socket part 301a and formed by a face having a diameter reduced toward the tip of the socket part 301; and a swelling part 340 having a diameter expanded outwardly in the radial direction R due to plastic deformation of a second fluid pipe 302. Since the engagement part 344 of the socket part 301a is engaged with the outer peripheral face 325 of the swelling part 340, separation of the second fluid pipe 302 is prevented. COPYRIGHT: (C)2009,JPO&INPIT
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