PROBLEM TO BE SOLVED: To provide a mowing height adjustment device, in which a rotation regulating tool for gradually regulating a rotation span of a link arm supporting a mower and a mowing height setting tool are reasonable arranged, which easily and quickly performs mowing height setting with a few backlashes.SOLUTION: A mower 1 is connected to a vehicle body 1 with a front part link 38 and a pair of right/left lifting links 40L, 40R provided to form the front part link 38 and a four side link. Link mechanisms 41L, 41R are provided between the pair of right/left lifting links 40L, 40R and a lateral supporting shaft 44 at the vehicle body 1 side, respectively. The mower 1 is configured to vertically move in parallel via the lifting links 40L, 40R by rotating the link mechanisms 41L, 41R around the lateral supporting shaft 44. A lifting lever 42 for turning the lateral supporting shaft 44 is provided at one side of the right and left of a driver seat 12. An adjustment dial 54 of the mowing height adjustment device 50 is provided at the other side of the right and left of the driver seat 12, thus achieving a compact side as well as reliable operation.COPYRIGHT: (C)2012,JPO&INPIT【課題】モーアを支持するリンクアームの回動範囲を段階的に規制する回転規制具と刈高設定器の配置構成を合理的になし、ガタの少ない状態で容易迅速に刈高設定が行える刈高さ調整装置を提供する。【解決手段】モーア1を、車体1に対して前部リンク38と、該前部リンク38と4辺リンクを形成すべく設ける左右一対の昇降リンク40L,40Rとで連結し、これら左右一対の昇降リンク40L,40Rと車体1側の横支持軸44との間には夫々リンク機構41L,41Rを設け、横支持軸44回りにリンク機構41L,41Rを回動することにより、昇降リンク40L,40Rを介してモーア1を平行上下動する構成とし、前記運転席12の左右一側には、前記横支持軸44を回動させる昇降レバー42を備え、前記運転席12の左右他側には刈高調節装置50の調整ダイヤル54を設け、コンパクトでかつ作動を確実とする。【選択図】図9
