PROBLEM TO BE SOLVED: To provide a vegetable harvester capable of preventing breakage of a drive shaft to improve durability of a sorting and conveying device even if contaminants, such as stones, are caught in the sorting and conveying device to be overloaded.SOLUTION: A root vegetable harvester includes: a pull-out conveying device (4) for pulling out crops from an agricultural field and a sorting and conveying device (6) for expanding and conveying the harvested crops received from the pull-out conveying device (4) using a conveying endless member (11). The conveying endless member (11) of the sorting and conveying device (6) supports a pair of circulating support bodies (12 and 13) in a freely circulating manner, and has a drive shaft (12a) for driving one circulating support body (12) and a transmission mechanism for overload handling is provided between the drive shaft (12a) and the circulating support body (12) to suppress transmission force within a predetermined range.COPYRIGHT: (C)2013,JPO&INPIT【課題】選別搬送装置に石等の夾雑物が噛み込んで過負荷がかかることがあっても、駆動軸の破損を防止して選別搬送装置の耐久性を向上することができる野菜収穫機を提供する。【解決手段】根菜類収穫機は、圃場から作物を引抜く引抜搬送装置(4)と、この引抜搬送装置(4)から受けた収穫作物を搬送無端体(11)によって展開搬送する選別搬送装置(6)とを備えて構成され、上記選別搬送装置(6)の搬送無端体(11)は、一対の周回支持体(12,13)によって周回可能に支持し、一方の周回支持体(12)を駆動する駆動軸(12a)を設けるとともに、この駆動軸(12a)と周回支持体(12)との間に伝動力を所定の範囲に抑える過負荷対応伝動機構を介設したものである。【選択図】図3
