PROBLEM TO BE SOLVED: To obtain electrostatic spraying suitable for a wide spraying operation form by utilizing the characteristic of a long rod-shaped conductive section.SOLUTION: A center boom 12 equipped with a plurality of spray nozzles 16, 18 for spraying the chemical, respectively, is fixed, and right and left side booms 13L, 13R are provided openably/closably and rotatably in a state for extending to a machine body side, and a state for storing on the machine body side face. A first conductive section 50C is arranged near the spray nozzles 16, 16... of the center boom 12. The second and third conductive sections 50SL, 50SR are arranged near the spray nozzles 18, 18... of the right and left side booms 13L, 13R, respectively. A first inverter 51C for supplying high voltage to the first conductive section 50C is provided in the center boom 12. Second and third inverters 51SL, 51SR for supplying high voltage to the second and third conductive sections 50SL, 50SR are provided in the right and left side booms 13L, 13R, respectively.COPYRIGHT: (C)2012,JPO&INPIT【課題】長い棒状の導電部の特性を生かして幅広の噴霧作業形態に適う静電散布を得ようとする。【解決手段】夫々薬液を噴出する複数の噴霧ノズル16,18を備えたセンタブーム12を固定して設けると共に左右のサイドブーム13L,13Rを機体側方に延出する状態と機体側面に収納する状態に開閉回動可能に設け、センタブーム12の噴霧ノズル16,16…の近傍に第1導電部50Cを配設し、左右サイドブーム13L,13Rの噴霧ノズル18,18…の近傍に第2,第3導電部50SL,50SRを夫々配設し、センタブーム12には第1導電部50Cへ高電圧を供給する第1インバータ51Cを設け、左右サイドブーム13L,13Rには第2、第3導電部50SL,50SRへ高電圧を供給する第2、第3インバータ51SL,51SRを夫々設ける。【選択図】 図6
