Assembly of resin pipe and metal member and method of manufacturing assembly

A method of manufacturing an assembly of a resin pipe and a metal member in which one metal end portion of the metal member is inserted in and fixed to a base having a cylindrical shape, made of resin, and protruding on an outer circumferential surface of the resin pipe at an intermediate position of the resin pipe in the longitudinal direction, wherein a base flow path extending in a protruding direction of the base is branched from an intermediate portion of a pipe passage of the resin pipe and the base flow path is open at a protruding end of the base, the method comprising:

• integrally forming, as the base, a resin circumferential rib that protrudes toward an outer circumferential side and is continuous around an entire circumference in a circumferential direction on a resin outer circumferential surface of a portion of the base where the one end portion is inserted;
• and
• inserting and fixing the one metal end portion on which a sealant having an annular shape is externally fitted in and to the base to interpose the sealant between a metal outer circumferential surface of the one metal end portion and a resin inner circumferential surface of the base, allow the metal outer circumferential surface of the one metal end portion to press the sealant to restrict movement of the sealant toward an inner side in a radial direction and toward a trailing end side of the one metal end portion in an insertion direction, and allow the resin inner circumferential surface of the base to press the sealant to restrict movement of the sealant toward outer side in the radial direction and toward a leading end side of the one metal end portion in the insertion direction, wherein
• the one metal end portion is a shape in which a small-diameter portion on the leading end side in the insertion direction, a large-diameter portion on the trailing end side in the insertion direction, and an enlarged-diameter portion whose outer diameter gradually increases from the small-diameter portion toward the large-diameter portion are continuously connected,
• the base comprises a base small-diameter portion corresponding to the small-diameter portion, a base large-diameter portion corresponding to the large-diameter portion, and a base enlarged-diameter portion corresponding to the enlarged-diameter portion, and
• an outer circumferential surface of the enlarged-diameter portion presses the sealant to restrict movement of the sealant toward the inner side in the radial direction and toward the trailing end side of the one metal end portion in the insertion direction.

An assembly of a resin pipe and a metal member in which one metal end portion of the metal member is inserted in and fixed to a base having a cylindrical shape, made of resin, and protruding on an outer circumferential surface of the resin pipe at an intermediate position of the resin pipe in the pipe's longitudinal direction, the assembly comprising

• a base flow path extending in a protruding direction of the base being branched from an intermediate portion of a pipe passage of the resin pipe and the base flow path is configured to be open at the protruding end of the base,
• a sealant externally fitted to the one metal end portion, interposed between a metal outer circumferential surface of the one metal end portion and a resin inner circumferential surface of the base, and having an annular shape,
• the metal outer circumferential surface of the one metal end portion pressing the sealant being configured to restrict movement of the sealant toward an inner side in a radial direction and toward a trailing end side of the one metal end portion in an insertion direction,
• the resin inner circumferential surface of the base pressing the sealant being configured to restrict movement of the sealant toward an outer side in the radial direction and toward a leading end side of the one metal end portion in the insertion direction,
• a resin outer circumferential surface of a portion of the base where the one metal end portion is inserted being provided with a resin circumferential rib that protrudes toward an outer circumferential side and is continuous around an entire circumference in a circumferential direction, and
• at least three resin vertical ribs that protrude toward the outer circumferential side and extend in the cylinder axial direction of the base are separated at an equal interval along the circumferential direction on the resin outer circumferential surface of the portion of the base where the one metal end portion is inserted.

A method of manufacturing an assembly of a resin pipe and a metal member in which one metal end portion of the metal member is inserted in and fixed to a base having a cylindrical shape, made of resin, and protruding on an outer circumferential surface of the resin pipe at an intermediate position of the resin pipe in the longitudinal direction, wherein a base flow path extending in a protruding direction of the base is branched from an intermediate portion of a pipe passage of the resin pipe and the base flow path is open at a protruding end of the base, the method comprising:

• integrally forming, as the base, a resin circumferential rib that protrudes toward an outer circumferential side and is continuous around an entire circumference in a circumferential direction on a resin outer circumferential surface of a portion of the base where the one end portion is inserted;
• integrally forming at least three resin vertical ribs that protrude toward the outer circumferential side, extend in the cylinder axial direction of the base and are separated at an equal interval along the circumferential direction on the resin outer circumferential surface of the portion of the base where the one metal end portion is inserted;
• and
• inserting and fixing the one metal end portion on which a sealant having an annular shape is externally fitted in and to the base to interpose the sealant between a metal outer circumferential surface of the one metal end portion and a resin inner circumferential surface of the base, allow the metal outer circumferential surface of the one metal end portion to press the sealant to restrict movement of the sealant toward an inner side in a radial direction and toward a trailing end side of the one metal end portion in an insertion direction, and allow the resin inner circumferential surface of the base to press the sealant to restrict movement of the sealant toward outer side in the radial direction and toward a leading end side of the one metal end portion in the insertion direction.