PROBLEM TO BE SOLVED: To provide a seedling transplanter in which a seedling planting part does not cause interference with lifting or lowering of a rotor by changing aspect of lifting or lowering of the rotor when lifting and lowering the seedling planting part.SOLUTION: A seedling-planting part 4 and rotors 27a and 27b are connected to each other by a lifting and lowering link apparatuses 40 to 43 and a lock cable 90 having a spring 95 is installed on the side of the planting part 4 and link members 76 and 77 are installed between the seedling-planting part 4 and the rotors 27a and 27b and a swing arm 92 is installed on a chain case 73 for driving of rotors 27a and 27b. When the seedling-planting part 4 is lowered, the cable 90 is energized by the spring 95 and the top of the cable 90 is inserted into a hole 92a of the arm 92 and the rotor 27b is fixed to the seedling-planting part 4. As a result, it is prevented that the rotor 27b collides with a field surface in cooperation with lowering motion of the seedling-planting part 4. When the seedling-planting part 4 is raised, the cable 90 is interlocked with motion of a machine body of an upper link 40, etc., and the top of the cable 90 is removed from the hole 92a of the arm 92 against energizing force of the spring 95 and the rotor 27a is freed from the machine body and the rotor 27b can freely vertically be moved by the spring 78.COPYRIGHT: (C)2008,JPO&INPIT【課題】苗植付部の昇降時にロータの昇降の態様を変化させて苗植付部がロータの昇降で干渉を受けないようにする。【解決手段】苗植付部4とロータ27a,bを昇降リンク装置40~43で連結し、植付部4側にバネ95付きのロックケーブル90を、苗植付部4とロータ27a,bとの間にリンク部材76,77,バネ78をロータ27a,bの駆動用のチェーンケース73にスイングアーム92を設ける。苗植付部4の下降しているときにはケーブル90がバネ95に付勢されて、その先端がアーム92の穴92aに挿入され、ロータ27bが苗植付部4に固定され、ロータ27bが苗植付部4の下降動作に連動して圃場面に衝突するおそれがない。また苗植付部4が上昇するとケーブル90が上リンク40などの機体の動きに連動してバネ95の付勢力に抗してケーブル90の先端がアーム92の穴92aから外れて機体に対してロータ27bがフリーとなりバネ78により自由に上下動ができる。【選択図】図6
