PROBLEM TO BE SOLVED: To facilitate attachment of a branch joint to a main pipe by fixing a flange part of the branch joint to an outer surface of the main pipe via an adhesive layer.SOLUTION: A water sprinkling block 10 includes a concrete layer (12), and the main pipe 14 and a branch structure are embedded in the concrete layer. The main pipe has a branch hole 16, and a branch hole insertion part 32 of the branch joint 18 is inserted in the branch hole. The flange part 30 of the branch joint is fixed to the main pipe via the adhesive layer 34 arranged on a lower surface of the flange part 30. A branch pipe 20 is inserted in a branch pipe connection portion 28 of the branch joint and a spray nozzle 22 is connected and secured to the branch pipe by a rubber ring. An upper end opening of the spray nozzle is exposed from the concrete layer. When water is introduced to the main pipe 14, the water flows through the branch pipe so as to be discharged from the spray nozzle. Accordingly, the attaching work is facilitated because the branch joint is fixed to the main pipe via the adhesive layer, and it is possible to obtain stable water cut-off performance since the branch joint and main pipe are pressingly held by reaction force of the concrete layer in such a state that they are fixed to each other via the adhesive layer.COPYRIGHT: (C)2009,JPO&INPIT【構成】 散水ブロック10はコンクリート層(12)を含み、このコンクリート層の中に本管14や分岐構造体を埋設する。本管に分岐孔16を形成し、この分岐孔に分岐継手18の分岐孔挿入部32を挿入し、つば部30の下面に設けた粘着剤層34を介してつば部を本管に取付ける。分岐継手の分岐管接続部28に分岐管20を差し込み、この分岐管に散水ノズル22をゴム輪接続によって装着する。散水ノズルの上端開口がコンクリート層から露出し、本管14に通水すると、その水が分岐管を通って散水ノズルから吐出される。【効果】 分岐継手と本管とを粘着剤層を介して取付けるので取り付け作業が簡単で、またその状態でコンクリート層で反力により両者を押さえつけるようにしたので、安定した止水性能を発揮することができる。【選択図】 図4
