PROBLEM TO BE SOLVED: To solve the problems of a seedling transplanter wherein the angle of the grounding bottom portion of a crawler is easily changed to change the posture of a vehicle body and change the transplantation postures of seedlings in a form for upward or downward swinging the crawler on a driving wheel or its driving wheel shaft to change the vehicle height, or wherein structure and operations are complicated in a form for lifting or lowering the grounding bottom portion of the crawler in a state always maintaining the parallel state.SOLUTION: There is provided the travel device of the seedling transplanter, characterized by mounting a front driving wheel 2 on a driving shaft 3 in each of both the right and left lateral sides of a vehicle body 1, mounting a rear rotating wheel 5 on a rotating wheel shaft 5 on the rear side, supporting a vertically swingable truck frame 8 through a pair of front and rear parallel link form support arms 6, 7, winding a crawler 11 around the outer peripheries of the upper front driving wheel 2 and rear rotating wheel 4 and the grounding rotating wheels 9, 10 arranged along the truck frame 8, in an approximately parallelogram-like shape, and vertically swinging the support arms 6, 7 to change the vehicle height.COPYRIGHT: (C)2010,JPO&INPIT【課題】 クローラを駆動輪、乃至この駆動輪軸の周りに上下に揺動させて車高を変更する形態では、クローラの接地底辺部の角度が変って、車体の姿勢が変り、苗移植姿勢が変化し易い。又、このクローラの接地底辺部を常時平行状を維持させて昇降させる形態とすると、構成はもとより、操作が煩雑となる。【解決手段】 車体1の左右両横部に前駆動輪2を駆動軸3で軸装すると共に、この後側の後転輪4を転輪軸5で軸装し、前後一対の平行リンク形態の支持アーム6、7を介して上下に揺動可能のトラックフレーム8を支架し、これら上部の前駆動輪2、及び後転輪4、並びに、前記トラックフレーム8に沿って配置の接地転輪9、10の外周にわたって略平行四辺形状にクローラ11を巻回し、前記支持アーム6、7を上下に揺動することによって車高を変更可能の構成とする。【選択図】 図1
