| 摘要 |
<p>PROBLEM TO BE SOLVED: To fix a required number of connection devices to the required positions of the opening part of a wall plate easily with filler such as mortar and reduce the quantity of the filler. SOLUTION: A required number of pipes 5 are connected to an opening part 3 formed in a wall plate 2 through the same number of connection devices 10 fixed to the opening part 3 with filler 7. Each connection device 10 has an inner cylinder 20 which has a connection hole into which the end part of the pipe 5 is inserted for connection at its center and an outer cylinder 30 provided around the outer circumference of the inner cylinder 20. The outer cylinder 30 has flat planes on its outer circumference and is composed of 1st and 2nd halved elements 31 and 41. A position discrepancy preventing means is provided between the inner cylinder 20 and the outer cylinder 30.</p> |
