Assembly of resin pipe and metal member and method of manufacturing assembly
A cylindrical shaped circumferential rib is integrally formed as a base protruding on the outer circumferential surface of a resin pipe. An annular sealant is externally fitted on one end portion of a metal member which is inserted in and fixed to the base to interpose the sealant between the one end portion and the inner circumferential surface of the base, allow the outer circumferential surface of the one end portion to press and restrict the movement of the sealant toward the inner side in the radial direction and toward the trailing end side of the one end portion in the insertion direction, and allow the inner circumferential surface of the base to press and restrict the movement of the sealant toward the outer side in the radial direction and toward the insertion direction distal end side of the one end portion.
1 . 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, and
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, 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.
2 . The assembly according to claim 1 , wherein more than one said resin circumferential rib is provided with the resin outer circumferential surface of the portion of the base and at least one of the resin circumferential ribs is disposed at a protruding opening end portion of the base.
3 . The assembly according to claim 1 , wherein more than one said resin circumferential rib is provided with the resin outer circumferential surface of the portion of the base and a plurality of the circumferential ribs is disposed at an interval in a cylinder axial direction of the base.
4 . The assembly according to claim 1 , wherein the one metal end portion is connected and fixed to the base by a metal screw part of the outer circumferential surface of the one metal end portion and a resin screw part of the inner circumferential surface of the base screwed to each other.
5 . The assembly according to claim 1 , wherein the sealant is an O-ring.
6 . The assembly according to claim 1 , wherein a protruding height of the base from the outer circumferential surface of the resin pipe is 1 mm or more and 30 mm or less.
7 . The assembly according to claim 1 , wherein the metal member has a flow path extending therethrough in the longitudinal direction thereof and the flow path is open at the leading end of the one metal end portion in the insertion direction, and the flow path and the pipe passage communicate with each other through the base flow path.
8 . 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.
9 . 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.
10 . 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.