Patent ID: 8801045

Claim:
A pipe joint comprising: a tube retention mechanism provided at an end portion of a fluid channel formed through a main body of the pipe joint, the tube retention mechanism including a chuck with a latch claw to be engaged with an outer circumferential surface of a tube inserted into the fluid channel so as to retain the tube; and a release bush to be inwardly pressed into the chuck to disengage the chuck from the tube thereby allowing the tube to be removed, wherein the release bush includes a cylindrical portion corresponding to an outer circumference of a tube insertion clearance in the main body and a flange portion for pressing formed along an outer edge of the release bush and located outside the main body, the cylindrical portion and the flange portion being integrally formed as a single component made of a synthetic resin, a part of the flange portion and a part of the cylindrical portion form a movable portion of the release bush that is movable with respect to a main portion of the release bush including a remaining part of the flange portion and a remaining part of the cylindrical portion via an elastically deformable portion of the release bush, the movable portion of the release bush having a latch piece including a part of the cylindrical portion, when an external operating force is applied to the movable portion of the release bush, the latch piece thereof is movable so as to be aligned with the cylindrical portion of the main portion of the release bush along the same circumference; and when the external operating force is not applied to the movable portion, the latch piece is located in a radially outer region of the cylindrical portion of the main portion of the release bush so as to oppose a portion of the main body, thereby inhibiting the release bush from being pressed into the chuck despite the flange portion being pressed.