| 摘要 |
<p>PURPOSE:To attain a joint for branch pipe connection which can be installed on an existing corrugate double wall pipe in a short time, easily and surely. CONSTITUTION:This joint is provided with a saddle part 3 which is connected to the outer periphery of a corrugate double wall pipe P, the first cylindrical part 4 for connecting a branch pipe K, and the second cylindrical part 5 installed on the first cylindrical part 4 coaxially. Moreover, at least the tip end of the second cylindrical part 5 is formed of plural flexible pieces 8. Each of the flexible pieces 8 is provided with an engaging protrusion 8a for engaging it with the outer wall 2 of the inner periphery of a connecting hole 9 in the corrugate double wall pipe P.</p> |
