PIPE CONNECTION STRUCTURE

• Main Authors: MIZUTANI KOJI, KATAYAMA KAZUTAKA, TAKIMOTO ISHI
• Format: Patent
• Language: English
• Published: 03.07.2014
• Subjects: BLASTING; COMBUSTION ENGINES; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a pipe connection structure which imparts drop-off regulation function of a pipe body by means of a member different from a resin tube, improves seal performance and can suppress permeation amount of fuel.SOLUTION: A resin tube 3 includes a tube main body part 31, a first diameter expansion part 32 which is formed so as to expand a diameter from an axial direction end of the tube main body part 31 and positions seal members 71, 72 in the axial direction by interposing the seal members 71, 72 between the axial directions with a retainer 4, and a second diameter expansion part 33 which is formed so as to further expand the diameter from the first diameter expansion part 32, comes into contact with the outer circumferential side of the seal members 71, 72 and is coupled in the state of coming into contact with the retainer 4. Thickness H32 of the first diameter expansion part 32 is the thickness H31 of the tube main body part 31 or more.