| 摘要 |
PURPOSE:To prevent generation of liquid accumulation and decrease of purity and further to improve reliability relating to prevention of a resin tube from coming off by improving seal performance between a fitting and the resin tube. CONSTITUTION:An annular protrusive part 10, formed in one end part periphery of a resin tube 4, is fitted in an annular recessed part 3 on the side of a fitting 1 formed with the annular recessed part 3 between the end face and the internal peripheral surface of a tubular fitting main unit 2, a tubular protruding part 5 formed along the peripheral surface of the resin tube 4 in the end face of the fitting main unit 2 is thermally deformed, and this deformed part is press attached to the peripheral surface of one end part 4a of the resin tube 4, also the annular protrusive part 10 is brought into close contact into the annular recessed part 3 in its pushed-in condition through contracting force of resin during its solidifying time. |
