Patent ID: 6908120

Claim:
A tube joint comprising: a body made of metal which has an opening for inserting a tube member thereinto and which is formed with a passage for flowing a pressure fluid; a cylindrical guide member internally fitted into said opening of said body, said guide member having a guide surface and a first annular groove formed on an inner wall thereof; a release member which is inserted displaceably in an axial direction into a hole of said guide member and which has a second annular groove formed on an outer wall thereof; a chuck member which is provided displaceably along said inner wall of said guide member and which is formed with pawls to bite into an outer circumferential surface of said tube member in order to fasten said tube member; a seal member which is provided displaceably along an inner wall of said body, which contacts said inner wall of said body so that a first seal section is formed, and which surrounds and contacts said outer circumferential surface of said tube member so that a second seal section is formed; and a fastening member which is provided to engage with said first annular groove of said guide member and said second annular groove of said release member and which prevents said release member from being disengaged from said hole of said guide member, wherein said chuck member is displaced together with said seal member along said inner wall of said guide member by said pressure fluid supplied into said passage, and thus said pawls are shrunk inwardly in a radial direction to fasten said tube member.