PROBLEM TO BE SOLVED: To improve reaping operation efficiency by making a reaping device smoothly following the ground and stabilizing the posture of the reaping device in rising state.SOLUTION: A reaping supporting table (38) is set at the front part of a chassis (1), and the rear end part of a supporting frame (12) supporting a reaping device (4) is vertically, freely turnably attached on the reaping supporting table (38). In addition, between the chassis (1) side and the supporting frame (12), a reaping vertical cylinder (39) for compulsively and vertically moving the reaping device (4) by thrust larger than the dead weight of the reaping device (4) and a reaping supporting cylinder (42) elastically supporting the reaping device (4) by thrust almost the same as the dead weight of the reaping device (4) are provided. Also, a sledge body (17) for grounding and supporting the self weight of the reaping device (4) is set at the lower part of the reaping device (4). Further, a height adjusting device (70) lifting or lowering the sledge body (17) to adjust to the reaping device (4) is provided.COPYRIGHT: (C)2009,JPO&INPIT【課題】刈取装置を滑らかに地面追従させると共に、上昇状態の刈取装置の姿勢を安定させて、刈取作業の能率を高める。【解決手段】車台(1)の前部に刈取支持台(38)を設け、刈取装置(4)を支持する支持フレーム(12)の後端部を刈取支持台(38)に上下回動自在に取り付ける。そして、車台(1)側と支持フレーム(12)との間に、刈取装置(4)の自重よりも大きな推力によって該刈取装置(4)を強制的に上下動させる刈取上下シリンダ(39)と、刈取装置(4)の自重と略同等の推力によって該刈取装置(4)を弾性的に支持する刈取支持シリンダ(42)とを設ける。また、刈取装置(4)の下部に該刈取装置(4)の自重を接地支持する橇体(17)を設ける。更に、橇体(17)を刈取装置(4)に対して昇降調節する高さ調節装置(70)を設ける。【選択図】図1
