PROBLEM TO BE SOLVED: To provide a chemical spraying working vehicle which enables the control for automatically lifting and lowering a side boom located outside revolving during revolving or at the end of revolving in consideration of safety.SOLUTION: An opening of a flow regulating valve 73 is adjusted by a flow control motor 10 so that a chemical flow from a chemical tank 18 has a suitable chemical application amount according to a vehicle speed obtained from a GPS receiver 81 or a vehicle speed obtained from a rotating speed of a wheel 12 or 13. At this time, the side boom 44 on the outside the revolving is automatically lifted on detecting a steering angle of the wheel 12 and/or 13, and when the vehicle speed reaches a predetermined value or more, automatic lifting of the side boom 44 outside revolving is not performed. The lifting of the side boom is thus controlled to prevent disadvantage such as breakage of the side boom 44 in the high-speed traveling state.COPYRIGHT: (C)2012,JPO&INPIT【課題】旋回時又は旋回終了時に旋回外側のサイドブームを自動的に上昇又は下降させる制御を安全性を考慮して可能にした薬剤散布作業車両を提供すること。【解決手段】GPS受信機81から得られる車速又は車輪12又は13の回転数から得られる車速により適切な薬液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。このとき車輪12及び/又は13の操舵角の検知により自動的に旋回外側のサイドブーム44の上昇を行い、また前記車速が所定値以上になると旋回外側のサイドブーム44の自動上昇を行わない制御を行うことで、高速走行時にサイドブーム44の破損等の不具合を防止できる。【選択図】図8
