SELF-TRAVELLING CHEMICAL SPRAYING MACHINE

To provide a self-travelling chemical spraying machine which improves convenience and safety of a braking mechanism of a spray boom.SOLUTION: A self-travelling chemical spraying machine includes: a travelling vehicle body A; an operation part; a chemical spraying part b1 constituted so as to move up/down by extention/contraction of a moving up/down cylinder; an accumulator U connected to the moving up/down cylinder; an opening/closing valve for opening/closing a passage for communicating the moving up/down cylinder and the accumulator; and a control part constituted so as to control the extention/contraction of the moving up/down cylinder or the opening/closing of the opening/closing valve by acquiring operation information of the operation part. The operation part includes a key switch for turning on the self-travelling chemical spraying machine. The control part performs opening control of the opening/closing valve on condition that the key switch is turned on, and performs closing control of the opening/closing valve on condition that the key switch is turned off.SELECTED DRAWING: Figure 1 【課題】散布ブームの制振機構の利便性や安全性を向上する自走式薬剤散布機を提供する。【解決手段】走行車体Ａと、操作部と、昇降シリンダの伸長または短縮によって昇降可能に構成された薬剤散布部ｂ１と、昇降シリンダと接続されたアキュムレータＵと、両者を連通する通路を開閉する開閉弁と、操作部の操作情報を取得して昇降シリンダの伸長または短縮及び前記開閉弁の開閉を制御可能に構成された制御部とを備え、操作部は、自走式薬剤散布機の電源を入れるキースイッチを備え、制御部は、前記キースイッチオンを条件として、開閉弁を開制御し、さらに、キースイッチオフを条件として、開閉弁を閉制御する。【選択図】図１