PROBLEM TO BE SOLVED: To improve the efficiency of reaping work by letting a reaping implement smoothly follow the surface of ground and stabilizing the posture of the reaping implement in lifted state.SOLUTION: A reap supporting bed 38 is placed at the front part of an undercarriage 1, and the rear end of a supporting frame 12 supporting the reaping implement 4 is attached to the reap supporting bed 38 in a vertically tiltable state. A reap tilting cylinder 39 to forcibly tilt the reaping implement 4 in vertical direction by a thrust larger than the weight of the reaping implement 4, and a reap supporting cylinder 42 to elastically support the reaping implement 4 by the thrust nearly equal to the weight of the reaping implement 4 are placed between the undercarriage 1 and the supporting frame 12. A sleigh 17 contacting with the ground and supporting the weight of the reaping implement 4 is placed under the reaping implement 4.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。【選択図】図1
