SIDES DIRECTION JUNCTION COUPLING DEVICE OF AIRTIGHTNESS

摘要

A unidirectional junction coupling device for airtightness is provided to prevent leakage by restraining a plug ring inserted into the connector body from being released outward. A unidirectional junction coupling device(10) includes a connection part(12) on which a male screw(121) is formed on the other outer periphery part of the connection body(11) on which an engaging protrusion is formed on the inner circumference. A packing settling unit in which the packing(40) inserted to the entrance inner side of the capnut connection part in the plug ring(30) is placed is integrally formed. A hollow junction(13) having a diameter smaller than the diameter of the external periphery portion is extended into one body on one side of the connection body. The plug ring integrally forms a pressing ring part(31) contacting on the packing on the outer periphery of hollow type. The capnut(20) forms the female threaded part(21) joined with the male threaded part of the capnut connection part in its inner circumference. A pressing unit(22) pressing the pressing ring part is integrally formed inside the outer end.