PROBLEM TO BE SOLVED: To provide an agrochemical spreader mounted on a rice transplanter capable of accurately synchronizing the planting action of the rice transplanter with the spreading action of the agrochemical spreader and consequently enabling the spreading of an accurate amount of agrochemical without fail.SOLUTION: The agrochemical spreader mounted on a rice transplanter is provided with a spreading mechanism to spread agrochemicals, a circular disk 6 rotatably supported on the main body of the rice transplanter, a conversion mechanism 7 to convert the reciprocating motion of a seedling bed of the rice transplanter to the rotary motion of the circular disk 6, a plurality of magnets 8 attached to the circular disk 6 and triggering the action of the spreading mechanism, a proximity switch 9 to detect the approach of the magnet 8 moving according to the rotation of the circular disk 6, and a controller to actuate the spreading mechanism by the detection of the magnet 8 with the proximity switch 9.COPYRIGHT: (C)2008,JPO&INPIT【課題】田植機の田植え動作と農薬散布装置の散布動作とが常に正確に同調し、その結果、常に正確な量の農薬を散布することができる田植機搭載型農薬散布装置を提供する。【解決手段】農薬を散布する散布機構と、田植機の本体に回転可能に支持された円板6と、田植機に具備される苗床台の往復動作を円板6の回転運動に変換する変換機構7と、円板6に設けられて散布機構の作動の契機となる複数の磁性体8と、円板6の回転に伴って移動する磁性体8の接近を検出する近接スイッチ9と、近接スイッチ9による磁性体8の検出を契機として散布機構を作動させる制御部とを備える田植機搭載型農薬散布装置を採用する。【選択図】図2
