PROBLEM TO BE SOLVED: To provide a seedling transplanter in which a contact type seedling box detection sensor is disposed on the conveyance upstream side of an interception tine for once stopping the conveyance of a seedling box to relax the contact impact of the seedling box with the interception tine by the contact resistance of the sensor itself with the seedling box, thereby preventing the breakage of the seedling box.SOLUTION: This seedling transplanter for taking out a seedling from a prescribed seedling takeout position P of a seedling conveyance route 31 to transplant the seedling in a field is characterized by disposing a seedling box supply portion and a main conveyance portion 31 having the seedling takeout position P in the seedling conveyance route 31, supplying a seedling box in the seedling box supply portion to the main conveyance portion 31 with a seedling box supply device, synchronously operating the seedling box supply portion on the basis of a detection result, when the absence of a seedling box is detected with a contact type seedling box detection sensor SW4 disposed in the main conveyance portion, disposing an interception tine 63 for once stopping the conveyance of the seedling box on the conveyance downstream side of the seedling box supply device and on the conveyance upstream side of the seedling takeout position, and placing the contact action portion t of the seedling box detection sensor SW4 between the conveyance upstream side and the downstream side of the action position of the interception tine 63.COPYRIGHT: (C)2007,JPO&INPIT【課題】 本発明の課題は、苗箱の移送を一旦受け止める遮断爪の搬送上手側に接触式の苗箱検出センサを設けることで、センサ自体の苗箱に対する接触抵抗によって苗箱が遮断爪に当たる衝撃を緩和し、苗箱の破損を防止することにある。【解決手段】 本発明は、苗箱搬送路31の所定の苗取出位置Pから苗を取り出して圃場へ移植する苗移植機において、苗箱搬送路は、苗箱供給部と苗取出位置Pを備える主搬送部31とを備え、苗箱供給部にある苗箱を苗箱供給装置で主搬送部31へ供給する構成とし、主搬送部に設けた接触式の苗箱検出センサSW4で苗箱がないことを検出すると、その検出結果に基づき供給装置が作動するように連動構成し、苗箱供給装置の搬送下手側で苗取出位置より搬送上手側に苗箱の移送を一旦受け止める遮断爪63を設け、遮断爪63の作用位置の搬送上手側から下手側にかけて苗箱検出センサSW4の接触作用部tを位置させる。【選択図】 図3
