PROBLEM TO BE SOLVED: To maintain smooth opening/closing of an opening/closing plate. A grain tank for storing grains that have been threshed and transported, a temporary storage unit 51 that temporarily stores a portion of the grains that are transported, and then releases the grains to the grain tank, The base end is axially supported by the measurement unit 52 provided side by side on the lateral side of the storage unit 51, which measures the quality of the temporarily stored grains, and the first side wall in the bottom region of the temporary storage unit 51. The door 57 includes a door 57 that is displaced between a closed state that swings upward and an open state that swings downward, and a leak preventer 60 provided on a second side wall that faces the first side wall. In the closed state, a free end of the door 57 is provided. The portion is close to the leak preventer 60, and the temporary storage unit 51 is in a state capable of storing grains, and in the open state, the grains temporarily stored in the temporary storage unit 51 are dropped into the grain tank and discharged. Becomes [Selection diagram] Figure 4【課題】円滑な開閉板の開閉を維持することを目的とする。【解決手段】脱穀されて搬送される穀粒が貯留される穀粒タンクと、搬送される穀粒の一部を一時的に貯留した後、穀粒タンクに放出する一時貯留部５１と、一時貯留部５１の横側方に並んで設けられ、一時的に貯留された穀粒の品質を計測する計測部５２と、一時貯留部５１の底部領域における第１側壁に基端が軸支され、上方に揺動した閉状態と下方に揺動した開状態とに変位する扉５７と、第１側壁と向かい合う第２側壁に設けられる漏れ防止具６０とを備え、閉状態では扉５７の遊端部が漏れ防止具６０に近接して一時貯留部５１は穀粒を貯留可能な状態となり、開状態では一時貯留部５１に一次貯留された穀粒が穀粒タンクに落下して放出される状態となる。【選択図】図４
