PROBLEM TO BE SOLVED: To provide a chemical spraying vehicle that enables a side boom on the outside of its turning curve to be raised and lowered at the start and end of turning without burdening an operator, and that can quickly start chemical spraying after the turning is over.SOLUTION: The opening of a flow regulating valve 73 is adjusted by a flow control motor 10 to adjust the amount of chemical flow from a chemical tank 18 so that chemical is sprayed in an appropriate amount according to vehicle speed obtained based on the speed of rotation of a wheel 12 or 13. If a steering angle is at or greater than a first predetermined angle at the start of turning, a side boom 44 on the outside of the turning curve is automatically raised if the steering angle is at or greater than a second predetermined angle at the end of turning, the side boom 44 on the outside of the turning curve is automatically lowered after the elapse of a predetermined period of time, whereby the side boom 44 can be raised and lowered without burdening an operator. Also, the side boom 44 can be lowered before the start of chemical spraying at the end of turning.COPYRIGHT: (C)2013,JPO&INPIT【課題】旋回開始時及び旋回終了時に旋回外側のサイドブームを作業者に負担をかけることなく上昇及び下降させることができ、旋回終了後は薬剤散布を速やかに開始できる薬剤散布作業車を提供することである。【解決手段】車輪12又は13の回転数から得られる車速により適切な薬剤散布量となるように薬液タンク18からの薬液流量を流量制御モータ10により流量調節弁73の開度を調整する。また、旋回開始時には操舵角が第1の所定角度以上の場合に自動的に旋回外側のサイドブーム44の上昇を行い、旋回終了時には操舵角が第2の所定角度以上の場合に所定時間経過してから自動的に旋回外側のサイドブーム44の下降を行うことで、作業者に負担をかけることなくサイドブーム44の昇降が行え、また旋回終了時の薬剤散布開始前に合わせてサイドブーム44を下降させることが可能になる。【選択図】図9
