Patent ID: 6199919
Filing Date: 2001-03-13
Classification: F16L

Abstract:
A tube connecting structure comprising:a resin tube having at least one end portion extending straight;a ring-shaped elastic seal member abutting an outer peripheral surface or an inner peripheral surface of said one end portion of the resin tube;an engagement member including a cylindrical base fitted onto the outer peripheral surface of said one end portion of the resin tube and a first engagement portion formed integrally with the cylindrical base;a cylindrical press-fitted member having a cylindrical body, said body press-fitted into the inner peripheral surface of the end portion of the resin tube, expanding a diameter of the end portion and fixing said engagement member to said resin tube; anda tubular mating member having an insertion end portion, said insertion end portion provided with a second engagement portion, said second engagement portion engaged with the first engagement portion of said engagement member, whereinsaid ring-shaped seal member is disposed in a radial annular groove defined by one end portion of said cylindrical press-fitted member and said engagement member such that said seal member contacts said tubular mating member and said one end portion of the resin tube when the insertion end portion of said tubular mating member is inserted into the outer peripheral surface or inner peripheral surface of the end portion of said resin tube, said second engagement portion engaged with said first engagement portion of said engagement member; thereby sealing the insertion end portion of said tubular mating member and said one end portion of said resin tube.