PROBLEM TO BE SOLVED: To provide a seedling planting apparatus capable of preventing a vibration by a transmission rotor and oscillation of a resonance at the time when the seedling spacing is widened or when the rotation of a planting drive shaft is accelerated by raising a travel speed.SOLUTION: A seedling planting apparatus is provided in a rotary case 31 with: an eccentric input rotary body 40 mounted on a planting revolving shaft 30 an eccentric output rotor 42 mounted on a driving axle 34 for rotating a planting lever 27 and an eccentric relay rotor 41 for transmitting the driving force from the eccentric input rotary body 40 to the eccentric output rotor 42. The eccentric input rotary body 40 is formed with an input flat part 41f, and the eccentric output rotor 42 is formed with an output flat part 42f. The seedling planting apparatus is constituted so that the input flat part 40f, the relay flat part 41f, and the output flat part 42f contact each other either at the bottom dead center of the seedling planting locus of the planting lever 27 or over a position at which the planting lever 27 leaves above a field surface after having passed the bottom dead center.COPYRIGHT: (C)2015,JPO&INPIT【課題】 苗の株間を広く変更したり、走行速度を上げて植付駆動軸の回転を速くする際に、伝動回転体による振動や共振の発振を防止できる苗植付装置を提供する。【解決手段】 苗植付装置は、回転ケース31には、植付回転軸30に装着する偏心入力回転体40と、植込杆27を回動させる回動軸34に装着する偏心出力回転体42と、偏心入力回転体40から偏心出力回転体42に駆動力を伝動する偏心中継回転体41を設け、偏心入力回転体40に入力平坦部40fを形成し、偏心中継回転体41に中継平坦部41fを形成すると共に、偏心出力回転体42に出力平坦部42fを形成し、植込杆27の苗植付軌跡の下死点、または下死点通過後から植込杆27が圃場面の上方に離脱する位置に亘って、入力平坦部40fと中継平坦部41fと出力平坦部42fが接触し合う構成とする。【選択図】図7
