PROBLEM TO BE SOLVED: To minimize jamming of grass clippings in a shutter mechanism and thereby reduce the maintenance/inspection and cleaning work to be performed on the shutter mechanism.SOLUTION: A riding-type lawn mower 10 comprises: a housing 20 in which cutting blades 31L, 31R are accommodated a cut grass receptacle 51 provided at the rear of the housing a cut grass delivery passage 22 for delivering lawn grass cut by cutting blades from the housing to the cut grass receptacle and a shutter mechanism 80 which can open and close the cut grass delivery passage, and switch the lawn mower between a bagging mode and a mulching mode. The shutter mechanism is provided on a lower part of the cut grass delivery passage and includes a horizontal spindle 82 disposed in a lower part of the inside of the cut grass delivery passage and also includes a shutter plate 83 swingable about the spindle between a fully closed position where the shutter plate closes the cut grass delivery passage and a fully opened position where the shutter plate is laid down from the fully closed position toward a discharge side of the cut grass delivery passage.COPYRIGHT: (C)2014,JPO&INPIT【課題】シャッタ機構への刈り芝の詰まりを極力抑制することによって、該シャッタ機構の保守点検作業や清掃作業を減らすこと。【解決手段】刈刃31L,31Rを収納したハウジング20と、該ハウジングの後部に備えた刈り芝収納容器51と、刈刃によって刈られた芝草をハウジングから刈り芝収納容器へ搬出する刈り芝搬出通路22と、該刈り芝搬出通路を開閉可能なシャッタ機構80とを有し、該シャッタ機構によってバギングモードとマルチングモードとに切り換え可能な乗用芝刈機10である。該シャッタ機構は、刈り芝搬出通路の下部に設けられており、刈り芝搬出通路の内部の下部に位置している横軸状の支軸82と、該支軸を中心にスイングして刈り芝搬出通路を開閉するシャッタプレートと83を含む。該シャッタプレートは、刈り芝搬出通路を塞ぐ全閉位置と、該全閉位置から刈り芝搬出通路の排出側へ倒れる全開位置との間で、スイング可能である。【選択図】図4
