Patent ID: 7040668

Claim:
A tube joint comprising: a joint body which has a fluid passage for allowing a pressure fluid to flow therethrough and which is formed of a resin material; an attachment/detachment mechanism for detachably attaching said joint body to a fluid tube; a fixing member made of a metal material which has a communicating passage between said fluid passage and a passage provided for a fluid pressure-operated apparatus and which has one end connected to an opening of said joint body and the other end fixed to a port of said fluid pressure-operated apparatus, wherein said fixing member includes an annular stepped portion; a sealing ring disposed on said annular stepped portion of said fixing member between said fixing member and the opening of said joint body, and wherein said sealing ring is not provided in an annular groove in said joint body; and a stress-mitigating mechanism which is provided at a site of connection between said joint body and said fixing member and which avoids concentration of stress on said site of connection exerted by any external force when said external force is applied to said joint body, wherein a wall thickness at a terminal location of said one end of said fixing member is formed such that said wall thickness at said terminal location is maximally thin-walled as compared with any other portions of said fixing member, and wherein said one end of said fixing member is connected to said opening of said joint body, said one end of said fixing member being sufficiently thin-walled and formed of a metal material capable of elastic deformation, so that said one end is deformable with respect to other portions of said fixing member that are not deformed, when said joint body is subjected to said external force.