Resin-made pipe joint

A resin-made pipe joint comprising:

• a joint body having:
• a body cylinder portion in which a flow path for a fluid is formed;
• an outer cylinder portion which is coaxially projected from the body cylinder portion in one axial direction;
• and an inner cylinder portion which is placed radially inside the outer cylinder portion, and which is coaxially projected from the body cylinder portion in a same direction as the outer cylinder portion so that a projection end is located on a side of the body cylinder portion with respect to a projection end of the outer cylinder portion, a groove portion which opens in one axial direction being formed while being surrounded by the body cylinder portion, the outer cylinder portion, and the inner cylinder portion;
• a sleeve having:
• a cylindrical fitting portion which is detachably fitted to a radially inner side of the outer cylinder portion;
• a cylindrical coupling portion which is projected from the fitting portion in one axial direction, and which is press-inserted into a one longitudinal end portion of the tube;
• a cylindrical inserting portion which is coaxially projected from the fitting portion in another axial direction, and which is inserted into the groove portion from an opening portion of the groove portion;
• and a cylindrical restricting portion which is placed radially inside the inserting portion, and which is projected from the fitting portion in a same direction as the inserting portion so that a projection end is located on a side of the fitting portion with respect to the projection end of the inserting portion, the sleeve being connectable to or detachable from the joint body in a state where the sleeve is coupled to the tube;
• and
• a fastening member which enables the tube to be fastened to the joint body through the sleeve, wherein
• the inserting portion has a radial width which is larger than a radial width of the groove portion, and is configured so that, when the fitting portion is to be fitted to the radially inner side of the outer cylinder portion in order to connect the sleeve to the joint body, a length of the press insertion into the groove portion is shorter than an axial depth of the groove portion, and the inserting portion is press-inserted into the groove portion while radially inwardly pressing and compressively deforming the inner cylinder portion,
• the restricting portion is configured to, in the press-insertion of the inserting portion into the groove portion, be located radially inside the inner cylinder portion to restrict deformational movement of the inner cylinder portion toward the radially inner side, the inner cylinder portion being pressed by the inserting portion,
• a sealing portion which seals between an inner circumferential surface of the inserting portion and an outer circumferential surface of the inner cylinder portion is formed by press-inserting the inserting portion into the groove portion in a state where the deformational movement of the inner cylinder portion is restricted by the restricting portion, and,
• when the radial width of the inserting portion is indicated by D1, the radial width of the groove portion is indicated by D2, the length of the press insertion of the inserting portion into the groove portion is indicated by L1, and the axial depth of the groove portion is indicated by L2, after the press insertion of the inserting portion into the groove portion is completed, a value of (D1−D2)/(L2−L1) is in a range of tan 5° to tan 15°, in a section including an axis of the inserting portion.