DUCT JUNCTION STRUCTURE

To accurately join ducts arranged in a construction facility for horticultural farming by a simple operation.SOLUTION: Provided is a duct junction structure, including: a hollow cylindrical female thread with a bellows structure inside; a ring section with spiral threads inside and movable within the bellows structure at the valley sites, forming a C-shape; and a hollow cylindrical male thread with a brim at one end and a spiral groove on the outside of the cylindrical section. The male threaded is passed through a hole on one duct so that the brim is inside the one duct, another duct is through the inside of the female threaded until the tip covers the outside of the female threaded, the hollow cylindrical part of the female threaded is inserted into the cylindrical part of the male thread, and then the hollow cylindrical part of the female threaded is rotated without rotating the other duct.SELECTED DRAWING: Figure 9 【課題】園芸農業を行うための構築物施設内に配設するダクトどうしを簡単な作業によって精度高く接合する。【解決手段】中空円筒形かつ内側が蛇腹構造の雌ねじ部と、内側に螺旋状のねじ山を備え、蛇腹構造の谷部位に該谷部位内を移動可能に設置され、Ｃ形形状を成すリング部と、一端につば部を備える中空円筒形かつ該円筒形の外側に螺旋状の溝を備える雄ねじ部と、を備え、一のダクト上にある孔に、つば部が一のダクトの内側となるように雄ねじ部を通し、雌ねじ部の内側を通って、先端が雌ねじ部の外側を覆う位置まで他のダクトを通し、雄ねじ部の円筒形部位に雌ねじ部の中空円筒形部位を差し込んだ後、他のダクトを回転させることなく、雌ねじ部の中空円筒形部位を回転させる。【選択図】図９