| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate necessity for forming a groove for positioning a rubber ring in a thin thickness part, provide sufficient strength in the thin thickness part, and increase load resistance for against propulsion force. SOLUTION: In the case of mounting a propulsion pipe seal material 16 in a thin thickness part 20, in a condition placing a lock part 26 along a pipe end surface of a propulsion pipe 12, a rubber ring part 22 is arranged in a peripheral surface of the thin thickness part 20. In the case of inserting the thin thickness part 20 mounting the propulsion pipe seal material 16 into a collar 14, the rubber ring part 22 is pressed in a pipe axial direction by the collar 14, but the lock part 26 integrally formed with the rubber ring part 22 is locked to the pipe end surface of the propulsion pipe 12, so as to prevent generation of position displacement in the rubber ring part 22.</p> |
