PROBLEM TO BE SOLVED: To firmly construct a reserve seedling tray of a riding rice transplanter.SOLUTION: The reserve seedling tray is switchable between a seedling box placing state to position a stationary reserve seedling tray 12d and mobile reserve seedling trays 12b, 12c one above the other, and a state to position the stationary reserve seedling tray 12d and the mobile reserve seedling trays 12b, 12c on the same plane to form a rail-formed transporting plane extending in one direction, by vertically rotating the mobile reserve seedling trays 12b, 12c. Drawable supporting frames 22a, 22b to support the lower faces of the mobile reserve seedling trays 12b, 12c rotated in vertical direction are placed under the stationary reserve seedling tray 12d in a state to be insertable and extractable in one direction. The supporting frames 22a, 22b are positioned within the frame of the mobile reserve seedling trays 12b, 12c in plane view in a state supporting the mobile reserve seedling trays 12b, 12c, and positioned within the frame of the stationary reserve seedling tray 12d in plane view in a housed state.COPYRIGHT: (C)2008,JPO&INPIT【課題】乗用田植機の予備苗載せ台を強固に構成する。【解決手段】可動予備苗載せ台12b,12cを上下に回動することにより、固定予備苗載せ台12dと可動予備苗載せ台12b,12cが上下に配置される苗箱載置状態と、前記固定予備苗載せ台12d及び可動予備苗載せ台12b,12cの苗箱載置面が面一状態で一方向に長いレール状の搬送面を形成する状態とに切り替え可能に構成し、前記固定予備苗載せ台12dの下方には上下反転回動した前記可動予備苗載せ台12b,12cの下面を支持する引き出し式の支持フレーム22a,22bを前記一方向に出し入れ収納自在に設け、該支持フレーム22a,22bは、前記可動予備苗載せ台12b,12cの支持状態では、平面視で可動予備苗載せ台12b,12cの枠内に位置し、収納状態では平面視で前記固定予備苗載せ台12dの枠内に位置するように構成した予備苗載せ台とした。【選択図】図3
