PROBLEM TO BE SOLVED: To provide a raising seedling box-piling device which can prevents the spill of soil or the exposure of seeds when piling raising seedling boxes, and enables the raising seedling boxes to be piled accurately in line.SOLUTION: The raising seedling box-piling device 3 is provided with a raising seedling box-piling mechanism 12 having supporting nails 88 attitude of each of which is exchangeable between an active attitude to lie flat inward, and a non-active attitude to sway upward: wherein the supporting nails 88 support both end parts of a raising seedling box C from below, and the raising seedling box-piling mechanism 12 is so constituted that the attitude of the supporting nail 88 is changed to the non-active attitude when the raising seedling box C is let down to the raising seedling box piling part to be piled thereon and the inward end part 88A of the supporting nail 88 in its active attitude is formed so as to be separated downward from the bottom surface of the raising seedling box C.COPYRIGHT: (C)2009,JPO&INPIT【課題】育苗箱を積み重ねる際における土のこぼれや種の露出を防止でき、育苗箱を精度よく整列させて積み重ねることができる育苗箱積み重ね装置を実現する。【解決手段】育苗箱積み重ね装置3において、育苗箱積み重ね機構12に、内方側に倒伏した作用姿勢と、上方に揺動した非作用姿勢とに姿勢変更可能な支持爪88を備えて、作用姿勢での支持爪88で育苗箱Cの両端部を下方から支持し、育苗箱積み重ね部に育苗箱Cを下降させて積み重ねると、支持爪88が非作用姿勢に姿勢変更されるように、育苗箱積み重ね機構12を構成するとともに、作用姿勢での支持爪88の内方側端部88Aの形状を、育苗箱Cの底面から下方に離れた形状に構成する。【選択図】図13
