PROBLEM TO BE SOLVED: To provide a sprinkler which is simply structured, has a small number of components, and is capable of efficiently and equally sprinkling water in a rectangular sprinkling range.SOLUTION: In the sprinkler 1 including a rotational driving mechanism 5 for rotationally driving a jet pipe 3 for jetting water by a prescribed angle each in a circumferential direction by the jetting pressure of water, the sprinkler is provided with a pattern coupler 2 configured by inserting an outer cylinder 22 and an inner cylinder 23 provided with water passing ports 22a and 23a communicable with each other, and the inner cylinder is connected with the jet pipe and rotatably configured. The pattern of the water passing ports is formed so as to control a jet water amount by changing the overlapping of the water passing ports provided on the inner and the outer cylinders by rotating the inner cylinder and changing the effective water passing area of the water passing ports corresponding to the sprinkling angle of the jet pipe.COPYRIGHT: (C)2013,JPO&INPIT【課題】構造が簡単で、部品点数も少なく、かつ矩形状の散水範囲に無駄なく均等に散水することのできるスプリンクラーを提供する。【解決手段】水噴出用の噴射管3を、水の噴出圧力により円周方向に所定角度ずつ回転駆動する回転駆動機構5を備えたスプリンクラー1において、相互に連通可能にした通水ポート22a、23aを設けた外筒22と内筒23を挿入して構成したパターンカプラ2を設け、内筒を前記噴射管と結合して回転可能に構成し、内筒を回転させることにより、内外筒に設けた通水ポートの重なり合いを変更して通水ポートの有効通水面積を噴射管の散水角度に応じて変更し、噴射水量を制御できるように、通水ポートのパターンを形成する。【選択図】図1
