PROBLEM TO BE SOLVED: To provide a work machine transmission of a rice transplanter that can contribute to control of the posture of planted seedlings.SOLUTION: A work machine transmission of a rice transplanter comprises: a rotary case that is integrally rotatably supported, and driven and rotated by an input shaft to which power is transmitted from a planting output shaft (134) a planting tine case rotatably and drivably provided on the rotary case planting tines provided in the planting tine case a planting part driven in such a manner that the tips of the planting tines perform turning movement and reciprocate between a seedling platform and a field surface in a vertical direction of the machine body a first speed change mechanism for changing the engine output to multiple speeds a second speed change mechanism that is arranged in series with the first speed change mechanism and changes the output of the first speed change mechanism into multiple speeds and constant velocity gears for making the output a constant velocity and non-constant velocity gears for making the output a non-constant velocity, both gears being included in at least one of the first speed change mechanism and the second speed change mechanism.COPYRIGHT: (C)2014,JPO&INPIT【課題】植付けた苗の姿勢の統制に寄与し得る田植機の作業機変速装置を提供する。【解決手段】田植機の作業機変速装置において、植付出力軸(134)から動力が伝達される入力軸によって一体回動自在に支持されるとともに回転駆動されるロータリーケースと、ロータリーケースに回動駆動自在に設けた植付爪ケースと、植付爪ケースに設けた植付爪とを備えて構成され、植付爪の先端が旋回運動を行って苗載台と圃場面との間を機体上下方向に往復移動するように駆動される植付部を備え、エンジンの出力を多段に変速する第1の変速機構と、第1の変速機構と直列に配置され、第1の変速機構の出力を多段に変速する第2の変速機構とを備え、第1の変速機構と、第2の変速機構の少なくとも一方が、出力を等速にするための等速ギヤと、出力を不等速にするための不等速ギヤとを含む。【選択図】図6
