PROBLEM TO BE SOLVED: To finely regulate the application amount of a material to be sprayed charged in a hopper without increasing the size of a fertilizer-spraying apparatus.SOLUTION: A spraying section 103 sprays the fertilizer 105 dropped from the hopper 102. A regulating section 104 is provided between the hopper 102 and the spraying section 103, and constituted by overlapping a bottom plate 201, a shutter plate 202 and a switching plate 203 so as to slide one another. A plurality of first dropping holes arranged in a circumferential direction with a central focus on the center point 208 thereof are formed at the bottom plate 201. A first closing area larger than the first dropping hole is provided between the first dropping holes. The shutter plate 202 is rotated in an axial direction of an agitator shaft 159 so as to change the opening area of the first dropping hole between in a fully open state and in a closed state. The switching plate 203 is rotated in the axial direction of the agitator shaft 159 so as to change the opening area of the first dropping hole between in the fully open state and the closed state.COPYRIGHT: (C)2012,JPO&INPIT【課題】肥料散布装置を大型化させることなくホッパに投入された被散布物の散布量の細かな調整を実現する。【解決手段】散布部103は、ホッパ102から落下した肥料105を散布する。調整部104は、ホッパ102と散布部103との間に設けられ、底板201とシャッタ板202と切換板203とを互いに摺動自在に重合させて構成される。底板201には、その中心点208を中心とする円周方向に並ぶ第1落下孔が複数形成される。第1落下孔同士の間には、第1落下孔より大きい第1閉止領域が設けられる。シャッタ板202は、アジテータシャフト159の軸回り方向に回動し、第1落下孔の開口面積を全部開放と閉止との間で変化させる。切換板203は、アジテータシャフト159の軸回り方向に回動し、第1落下孔の開口面積を全部開放と一部開放との間で変化させる。【選択図】図3
