PROBLEM TO BE SOLVED: To enhance stability in storage movement by lowering the center of gravity of a grass mower and to ensure rear side visibility in the storage movement.SOLUTION: A grass mower 11 includes: a support frame 41 mounted on an agricultural tractor 21 a first boom 51 supported on one end in a vehicle width direction of the support frame 41 so as to be turned vertically a first link mechanism A including a lift cylinder 43 turning the first boom 51 vertically a second boom 61 connected with the first boom 51 so as to be turned, and mounted with a grass mowing work part 31 at a tip and a second link mechanism B including a grass mowing work part turning cylinder 63 turning the grass mowing work part 31 vertically with respect to the second boom 61. In a storage state where the grass mowing work part 31 is positioned in a rear part of the agricultural tractor 21, the grass mower is folded so that the first boom 51 is positioned above the support frame 41 to be nearly horizontal, the second boom 61 becomes nearly horizontal with respect to the first boom 51, and a grass mowing blade rotation shaft of the grass mowing work part 31 is positioned to be nearly horizontal with respect to the second boom 61.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】草刈機の重心を低くして格納移動時の安定性を高めるとともに格納移動時の後方視界を確保する。【解決手段】農業用トラクタ21に装着される支持フレーム41と、支持フレーム41の車幅方向一端部に上下回動自在に支持された第1ブーム51と、前記第1ブーム51を上下方向に回動させるリフトシリンダ43を含む第1リンク機構Aと、前記第1ブーム51に回動自在に連結され、先端に草刈作業部31を装着した第2ブーム61と、前記第2ブーム61に対し草刈作業部31を上下方向に回動させる草刈作業部回動シリンダ63を含む第2リンク機構Bを備え、草刈作業部31が農業用トラクタ21の後方に位置する格納状態のとき、第1ブーム51が支持フレーム41上方に位置して略水平となり、第2ブーム61が第1ブーム51に対して略水平となり、草刈作業部31の草刈刃回転軸が第2ブーム61に対し略平行に位置するように折り畳まれる草刈機11。【選択図】図1
