PROBLEM TO BE SOLVED: To facilitate taking water into a chemical tank, and to facilitate draining a chemical remaining in the chemical tank.SOLUTION: A second pipe (20b) for pest control is provided which supplies air or liquid, sent from a pest control pump (21), into a chemical tank (18). The rear end of the second pipe (20b) for pest control is provided with a connection part (29) which connects a water-intake device (40) for supplying water from an external water source (G) into the chemical tank (18), and a switching valve (28) which switches between supply or non-supply of the air or liquid from the pest control pump (21) to the water-intake device (40). A liquid level gauge (45) is provided which indicates the amount of a chemical in the chemical tank (18). The switching valve (28), the connection part (29), and the liquid level gauge (45) are arranged at a side or back position of the chemical tank (18) so as to be close to each other.COPYRIGHT: (C)2013,JPO&INPIT【課題】本発明は、水を薬液タンク内に取水し易くすることを課題とする。また、薬液タンク内の残留薬液を排水し易くすることを課題とする。【解決手段】薬液タンク(18)内に防除ポンプ(21)から送られる空気又は液体を供給する防除用第二管(20b)を設け、該防除用第二管(20b)の後端部には、外部の水源(G)から水を薬液タンク(18)内に供給するための取水装置(40)を連結する連結部(29)と、防除ポンプ(21)からの空気又は液体を取水装置(40)に供給するか供給しないかを切り換える切換バルブ(28)を設け、薬液タンク(18)内の薬液の液量を示す液面計(45)を設け、切換バルブ(28)と連結部(29)と液面計(45)は、薬液タンク(18)の側面又は背面位置に互いに接近した位置に設ける。【選択図】 図2
