PROBLEM TO BE SOLVED: To provide a chemical spray mechanism of a speed sprayer for enhancing spray efficiency and the spray effect to specific fruit tree cultivation, while further enhancing the splash prevention effect of a chemical in the unnecessary direction.SOLUTION: When constituting a chemical spray mechanism of arranging a plurality of injection nozzles in an air blowing passage of passing through an air blowing outlet 3 of straddling left-right side surfaces 2p and 2q and an upper surface 2u of a vehicle body 2, at least one or more optimization spray parts S comprising a spray duct 6 for providing a secondary outlet 5 opening toward the specific direction on the tip and communicating with the air blowing outlet (primary outlet) 3, at least one or more injection nozzles arranged on the inside of this spray duct 6 and arranged along a secondary outlet 5 and at least one or more straightening plates arranged on the inside of the spray duct 6 and arranged along the secondary outlet 5, are provided by adding to the air blowing outlet 3.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】不要な方向への薬液の飛散防止効果をより高めるとともに、特定の果樹栽培に対して、散布効率及び散布効果を高めたスピードスプレーヤの薬液散布機構を提供する。【解決手段】車両ボディ2の左右側面2p,2q及び上面2uに跨がる送風出口3を通る送風経路内に複数の噴射ノズルを配してなる薬液散布機構を構成するに際して、送風出口3に付設することにより、先端に特定の方向に向けて開口し、かつ送風出口(一次出口)3に連通する二次出口5を設けた散布ダクト6と、この散布ダクト6の内部に配し、かつ二次出口5に沿って配した少なくとも一以上の噴射ノズルと、散布ダクト6の内部に配し、かつ二次出口5に沿って配した少なくとも一以上の整流板とを備えて構成した少なくとも一以上の適化散布部Sを設ける。【選択図】図1
