PROBLEM TO BE SOLVED: To improve a loadage of preliminary seedling by providing a sub preliminary seedling placement part different from a preliminary seedling placement part, while facilitating supply work of seedling in a preliminary seedling placement part, improve working efficiency by smoothly performing planting work, and prevent occurrence of abnormal operation of the seedling planting part caused by a planting clutch.SOLUTION: The seedling planting machine comprises: a seedling planting part at a rear part of a travel vehicle body a planting clutch 169 for turning on/off transmission to the seedling planting part, the planting clutch 169 including an operation groove 171a formed on an outer peripheral surface of a driven clutch claw body 171 thereof and an operation pin 173 that, upon inserted into the operation groove 171a, moves the driven clutch claw body 171 to a side away from the drive clutch claw body 170. The operation groove 171a includes a reversal guide face 171c into which the operation pin 173 is inserted when the planting clutch 169 is reversed.COPYRIGHT: (C)2015,JPO&INPIT【課題】予備苗載部での苗の供給作業の容易化を維持しながら、予備苗載部とは別の副予備苗載部を設けて予備苗の搭載量の向上を図り、植付作業を円滑に行えるようにして作業能率の向上を図ると共に、植付クラッチによる苗植付部の異常な動作の発生を防止することを課題とする。【解決手段】走行車体の後部に苗植付部を設け、苗植付部への伝動を入切する植付クラッチ169を設け、植付クラッチ169の従動クラッチ爪体171の外周面には操作溝171aを形成し、操作溝171aに挿入されると従動クラッチ爪体171を駆動クラッチ爪体170から離れ側に移動させる操作ピン173を設け、操作溝171aは、植付クラッチ169の逆転時に操作ピン173が挿入される逆転用の案内面171cを備える構成とした。【選択図】 図21
