PROBLEM TO BE SOLVED: To solve such a problem that conventionally, working machines such as a fertilizing seeder, which supply feed stock while moved by a travelling vehicle, rotate their supply motor at a high rate to supply excessive feed stock if the grounding wheel is apart from the road surface caused by lift-up or bound on the turning of a travelling vehicle, when the feed stock supply amount per a unit moving distance is controlled to be constant regardless of moving rate by synchronizing the rotation speed of the feed motor to the moving rate detected with a grounding wheel.SOLUTION: Control structure is composed to transmit a drive signal to a feed actuator which actuates a supply device supplying a feed stock, only when a grounding wheel 66 grounds, based on a grounding signal from a grounding sensor 71, by providing on a grounding type moving rate detecting device 42 a grounding sensor 71 detecting whether a grounding wheel 66 grounding or not.COPYRIGHT: (C)2011,JPO&INPIT【課題】従来より、走行車両によって移動されながら圃場に供給物を供給する施肥播種機等の作業機では、接地輪で検知した移動速度に供給モータの回転速度を同調させることにより、単位移動長当たりに供給される供給物の量を移動速度にかかわらず一定に制御する際に、走行車両旋回時のリフトアップやバウンドで接地輪が路面から離間して無負荷で高速空転すると、供給モータが高速回転して供給物の量が過剰になる、という問題があった。【解決手段】接地式移動速度検知装置42には、接地輪66の接地の有無を検知する接地センサ71を設け、該接地センサ71からの接地信号に基づいて、接地輪66が接地している場合にのみ前記駆動信号を送信する制御構成とした。【選択図】図5
