PROBLEM TO BE SOLVED: To provide a rice planting machine that can reliably understand a consumption rate of mat-like seedlings per a set area during planting operation, and reliably detect decrease in an amount of a residual seedling.SOLUTION: The rice planting machine includes an upper existence sensor S1 at an upper position and a lower existence sensor S2 at a lower position to detect the mat-like seedlings placed on a platform. A seedling consumption rate calculation means 55 calculates the seedling consumption rate based on a counted number of mat-like seedlings detected by an upper existence sensor S1 and a travel distance measured by a travel distance measuring means 51, and displays the seedling consumption rate on a monitor 31. When the mat-like seedlings W is not detected by the lower existence sensor S2, a notification processing means 61 lights an alarm lamp 43.COPYRIGHT: (C)2013,JPO&INPIT【課題】植付け作業時に設定面積あたりのマット状苗の消費率を確実に把握でき、苗残量の低下も確実に検知する田植機を構成する。【解決手段】苗載台に載置されたマット状苗を検知するように、上部位置に上部存否センサS1を備え、下部位置に下部存否センサS2を備えた。上部存否センサS1で検知されるマット状苗の枚数をカウントし、走行距離計測手段51で計測した走行距離に基づいて苗消費率演算手段55が苗消費率を演算してモニタ31に表示する。下部存否センサS2でマット状苗Wを検知しない場合には報知処理手段61が警報ランプ43を点灯させる。【選択図】図7
