PROBLEM TO BE SOLVED: To provide means for avoiding switching to a weighing state in an inappropriate state, in a spraying device equipped on an agricultural implement.SOLUTION: A chemical spraying device equipped on an agricultural implement includes a spraying mechanism G for spraying an agricultural material over a field, and a weighing control unit 81 for switching the state of the spraying mechanism G between a spraying state for spraying the agricultural material over the field, and a weighing state for discharging a prescribed amount of the agricultural material. The weighing control unit 81 prohibits switching to the weighing state of the spraying mechanism G, when the agricultural implement is executing an agricultural work operation.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2020,JPO&INPIT【課題】農作業機に備えられる散布装置において、不適切な状況での計量状態への切り替えを回避する手段を提供する。【解決手段】 農作業機に備えられる薬剤散布装置は、圃場に農業資材を散布する散布機構Ｇと、散布機構Ｇの状態を、圃場に農業資材を散布する散布状態、又は所定量の農業資材を排出する計量状態、の何れかに切り替える計量制御部８１と、を備える。計量制御部８１は、農作業機が農作業動作を実行しているときには、散布機構Ｇの計量状態への切り替えを禁止する。【選択図】図５
