PROBLEM TO BE SOLVED: To provide a seedling transplanter stabilizing a planting state of seedling and improving workability by providing a torque leveling mechanism on a planting drive transmission member of a planting part, causing the planting drive transmission member to generate an inverse-phase torque fluctuation and preventing torsional vibration and backlash of the planting drive transmission member.SOLUTION: A seedling transplanter comprises: a transmission mechanism (a PTO (Power TakeOff) shaft 123) for taking a drive PTO output from a transmission case 4 and planting drive means for driving a planting arm 22 that supports and rotates a planting claw 17. The planting drive means includes a planting drive lateral-transmission member 51 for driving the planting arm 22 by a non-constant speed mechanism, a planting drive vertical-transmission member 53 for distributing the planting drive force from the planting drive lateral-transmission member 51 to the planting arm 22, and a planting drive arm transmission member 47 for transmitting the planting drive force from the planting drive vertical-transmission member 53 to the planting arm 22. The planting drive means has a torque leveling mechanism 101, and the torque leveling mechanism 101 uses elastic force of an elastic body for rotation torque.COPYRIGHT: (C)2014,JPO&INPIT【課題】植付部の植付駆動伝達部材にトルク平準化機構を設け、植付駆動伝達部材に逆位相のトルク変動を発生させて植付駆動伝達部材のねじり振動やガタつきを防ぐことで苗の植付状態を安定化し、作業性を向上させた苗移植機を提供する。【解決手段】ミッションケース4から駆動PTO出力を取り出す伝動機構(PTO軸123)と、PTO軸123からの動力で、植付爪17を支持して回転させる植付アーム22を駆動させる植付駆動手段とを備え、植付駆動手段は、植付アーム22を不等速機構によって駆動する植付駆動横伝達部材51と、植付駆動横伝達部材51からの植付駆動力を植付アーム22に分配する植付駆動縦伝達部材53と、植付駆動縦伝達部材53からの植付駆動力を植付アーム22に伝達する植付駆動アーム伝達部材47とを備え、植付駆動手段には、トルク平準化機構101を設け、トルク平準化機構101は、弾性体の弾性力を回転トルクに用いる。【選択図】図4
