PROBLEM TO BE SOLVED: To provide an autonomous control mower which does not stop work easily.SOLUTION: When a rotary speed of a reaping blade becomes lower than a first rotary speed, a vehicle speed is reduced at ST06 (primary counter measure). When the rotary speed of the reaping blade becomes lower than a second rotary speed, backward movement is performed for a constant time at ST09 (secondary counter measure). By performing backward movement, the autonomous control mower can be sufficiently separated from an obstruction (tree or rock), and on and after that, a mowing work can be performed normally by the mower. Therefore, on the autonomous control mower, a work does not easily stop.SELECTED DRAWING: Figure 7COPYRIGHT: (C)2020,JPO&INPIT【課題】簡単には作業が中断しないような自律制御型草刈機を提供する。【解決手段】刈刃の回転速度が第１回転速度を下回ったときには、ＳＴ０６で車速を低減する（第１次対策）。刈刃の回転速度が第２回転速度を下回ったときには、ＳＴ０９で一定時間後進させる（第２次対策）。後進させることで、障害物（樹木や岩）から自律制御型草刈機を十分に離すことができ、以降通常の草刈り作業を継続させることができる。よって、簡単には作業が中断しないような自律制御型草刈機が提供される。【選択図】図７
