| 摘要 |
An engagement section (7a) of a holder (7) is engaged with a metal gasket (6), the gasket (6) is received in a tubular section (7b), and the tubular section (7b) is fitted in a step section (5a) of a connection pipe (1a). Then, another connection pipe (1b) is placed close to and facing the connection pipe (1a) that holds the gasket (6) through the holder (7), and a center ring (9) is installed surrounding the outer peripheries of flanges (2a, 2b). Subsequently, while a trapezoidal section having slopes (3a, 3b) as opposite sides is inserted into a groove (14), segments (10a-10c) are closed to form a ring shape. A bolt (11) penetrated through a cutout (12) of the segment (10a) is screwed into a threaded hole (13) of the segment (10c). The screwing of the bolt causes the amount of insertion of the trapezoidal section, which has the slopes (3a, 3b) as opposite sides, into the groove (14) to be increased. As a result the distance between the flanges (2a, 2b) is reduced and contact pressure of projections (4a, 4b) against both sides of the gasket (6) is increased. |
