| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a connection structure for fixing a resin pipe on a metallic tank of a heat exchanger via a connection collar having a means for preventing rotation of the resin pipe with a simple structure and preventing formation of parting lines of a die on an O-ring engaging part when forming the resin pipe. SOLUTION: A locking part 13 formed by cutout parts is formed on a tip of the resin pipe 4, and an engaging part 7 formed by a claw part is fixed on a first stepped part 6 set on a tip of a connection cup 2. There is no annular groove formed on outer periphery of the tip of the resin pipe 4, and an outer flange part 3 of the resin pipe 4 is seated on a second stepped part 8 of the connection cup 2.</p> |
