A resin-made pipe joint with enhanced sealing property between a joint body and sleeve. A sealing portion which seals between an inner circumferential surface of an inserting portion of a sleeve and an outer circumferential surface of an inner cylinder portion is formed by press-inserting an inserti
A resin-made pipe joint with enhanced sealing property between a joint body and sleeve. A sealing portion which seals between an inner circumferential surface of an inserting portion of a sleeve and an outer circumferential surface of an inner cylinder portion is formed by press-inserting an inserting portion into a groove portion of the joint body. When the inserting portion is press-inserted into the groove portion, a space is formed between a body cylinder portion located opposite to an opening portion of the groove portion in the axial direction, and the projection end of the inserting portion. After completing press insertion of the inserting portion into the groove portion, in a section including axis of the inner cylinder portion, a region in the outer circumferential surface of the inner cylinder portion facing the space forms an angle of 5° to 15° to the axis of the inner cylinder portion.
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1. 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
1. 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; anda fastening member which enables the tube to be fastened to the joint body through the sleeve, whereinthe inserting portion has a radial width which is larger than a radial width of the groove portion, and is configured to, 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, be 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,when the inserting portion is press-inserted into the groove portion, a space is formed between the body cylinder portion which is located opposite to the opening portion of the groove portion in the axial direction, and the projection end of the inserting portion, and,after the press insertion of the inserting portion into the groove portion is completed, in a section including an axis of the inner cylinder portion, a region which is in the outer circumferential surface of the inner cylinder portion, and which faces the space forms a predetermined angle in a range of 5° to 15° to the axis of the inner cylinder portion. 2. The resin-made pipe joint according to claim 1, wherein a first butting surface is disposed on the restricting portion of the sleeve,a second butting surface which is buttable against the first butting surface is disposed on the inner cylinder portion of the joint body, and,after the press insertion of the inserting portion into the groove portion is completed, the inner cylinder portion is clamped between the inserting portion and the restricting portion, to cause the first butting surface and the second butting surface to be press-contacted with each other, thereby forming a sealing portion which seals between the first butting surface and the second butting surface. 3. The resin-made pipe joint according to claim 2, wherein the fastening member has: a cylindrical pressing portion which is to be fitted onto the tube movably in a longitudinal direction of the tube; and a cylindrical outer ring portion which is screwable to the outer cylinder portion of the joint body from a radially outer side,an expanding portion which, when the coupling portion of the sleeve is press-inserted into the tube, expands radially outward a part of the tube to be flared is disposed in the coupling portion, and,when the outer ring portion is screwed to the outer cylinder portion, the pressing portion presses the expanding portion toward the body cylinder portion to cause the inserting portion to be press-inserted into the groove portion. 4. The resin-made pipe joint according claim 2, wherein a projection end portion of the inserting portion is formed into a tapered shape in which an inner diameter of the projection end portion is larger as further advancing from the fitted side toward a side of the projection end. 5. The resin-made pipe joint according to claim 1, wherein the fastening member has: a cylindrical pressing portion which is to be fitted onto the tube movably in a longitudinal direction of the tube; and a cylindrical outer ring portion which is screwable to the outer cylinder portion of the joint body from a radially outer side,an expanding portion which, when the coupling portion of the sleeve is press-inserted into the tube, expands radially outward a part of the tube to be flared is disposed in the coupling portion, and,when the outer ring portion is screwed to the outer cylinder portion, the pressing portion presses the expanding portion toward the body cylinder portion to cause the inserting portion to be press-inserted into the groove portion. 6. The resin-made pipe joint according claim 5, wherein a projection end portion of the inserting portion is formed into a tapered shape in which an inner diameter of the projection end portion is larger as further advancing from the fitted side toward a side of the projection end. 7. The resin-made pipe joint according to claim 1, wherein a projection end portion of the inserting portion is formed into a tapered shape in which an inner diameter of the projection end portion is larger as further advancing from the fitted side toward a side of the projection end. 8. The resin-made pipe joint according claim 7, wherein a projection end portion of the inserting portion is formed into a tapered shape in which an inner diameter of the projection end portion is larger as further advancing from the fitted side toward a side of the projection end. 9. 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; anda fastening member which enables the tube to be fastened to the joint body through the sleeve, whereinthe 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. 10. The resin-made pipe joint according to claim 9, wherein a first butting surface is disposed on the restricting portion of the sleeve,a second butting surface which is buttable against the first butting surface is disposed on the inner cylinder portion of the joint body, and,after the press insertion of the inserting portion into the groove portion is completed, the inner cylinder portion is clamped between the inserting portion and the restricting portion, to cause the first butting surface and the second butting surface to be press-contacted with each other, thereby forming a sealing portion which seals between the first butting surface and the second butting surface. 11. The resin-made pipe joint according to claim 10, wherein the fastening member has: a cylindrical pressing portion which is to be fitted onto the tube movably in a longitudinal direction of the tube; and a cylindrical outer ring portion which is screwable to the outer cylinder portion of the joint body from a radially outer side,an expanding portion which, when the coupling portion of the sleeve is press-inserted into the tube, expands radially outward a part of the tube to be flared is disposed in the coupling portion, and,when the outer ring portion is screwed to the outer cylinder portion, the pressing portion presses the expanding portion toward the body cylinder portion to cause the inserting portion to be press-inserted into the groove portion. 12. The resin-made pipe joint according to claim 11, wherein a projection end portion of the inserting portion is formed into a tapered shape in which an inner diameter of the projection end portion is larger as further advancing from the fitted side toward a side of the projection end. 13. The resin-made pipe joint according to claim 10, wherein a projection end portion of the inserting portion is formed into a tapered shape in which an inner diameter of the projection end portion is larger as further advancing from the fitted side toward a side of the projection end. 14. The resin-made pipe joint according to claim 9, wherein the fastening member has: a cylindrical pressing portion which is to be fitted onto the tube movably in a longitudinal direction of the tube; and a cylindrical outer ring portion which is screwable to the outer cylinder portion of the joint body from a radially outer side,an expanding portion which, when the coupling portion of the sleeve is press-inserted into the tube, expands radially outward a part of the tube to be flared is disposed in the coupling portion, and,when the outer ring portion is screwed to the outer cylinder portion, the pressing portion presses the expanding portion toward the body cylinder portion to cause the inserting portion to be press-inserted into the groove portion. 15. The resin-made pipe joint according to claim 14, wherein a projection end portion of the inserting portion is formed into a tapered shape in which an inner diameter of the projection end portion is larger as further advancing from the fitted side toward a side of the projection end. 16. The resin-made pipe joint according to ne claim 9, wherein a projection end portion of the inserting portion is formed into a tapered shape in which an inner diameter of the projection end portion is larger as further advancing from the fitted side toward a side of the projection end.
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