PROBLEM TO BE SOLVED: To simplify a work for changing a kind of chemical liquids and surely prevent a different kind of chemical liquids from being intermixed.SOLUTION: A chemical liquid unit 29 is constituted by unifying a chemical liquid tank 4 and a chemical liquid pump 12 with a connecting member 28 each other. A chemical liquid flow path 13 is detachably connected to an interflowing place 9 of a fresh water W and a chemical liquid S. In case of changing a kind of chemical liquids to spray, the chemical liquid flow path 13 is removed from the interflowing place 9, the chemical liquid unit 29 is changed to another chemical liquid unit, and the chemical liquid flow path of the new chemical liquid unit is connected to the interflowing place 9.COPYRIGHT: (C)2008,JPO&INPIT【課題】 薬液の種類の変更作業を簡易化し、且つ、種類の異なる薬液が混じることを確実に防止する。【解決手段】 薬液タンク4と薬液ポンプ12を連結部材28で互いに一体化させて薬液ユニット29とし、薬液流路13を、清水Wと薬液Sの合流部9に取り外し可能な接続とした。散布すべき薬液の種類を変更する場合には、前記薬液流路13を前記合流部9から取り外し、前記薬液ユニット29を他の薬液ユニットに交換する。そして、新たな薬液ユニットの薬液流路を前記合流部9へと接続する。【選択図】 図1
