PROBLEM TO BE SOLVED: To solve a problem that, in a prior art, working efficiency is lowered due to the deterioration of working accuracy caused by a slip of a grounding wheel because of a soil face which is uneven in hardness and large in inclination, and the tangling of grass to a power transmission part such as the grounding wheel, a chain case or the like, in a working machine having a working device which applies prescribed work to a farm field while progressing by being attached to a traveling vehicle, a power takeout device which takes out a drive force of the working machine by the rolling of the grounding wheel, and a support wheel which supports the working machine and the power takeout device at a prescribed height.SOLUTION: A support wheel 28 and a grounding wheel 11 are sequentially arranged in a row from the vicinity of tires 66 immediately rearward in the progressing direction of the tires 66 being traveling wheels of a tractor 1, and a rolling face 69 of the grounding wheel 11 is formed on a second soil packing face 68 being a common soil packing face which is formed of the tires 66 and the support wheel 28.COPYRIGHT: (C)2014,JPO&INPIT【課題】従来より、走行車両に装着して進行しながら圃場に所定の作業を施す作業装置と、該作業装置の駆動力を接地輪の転動によって取り出す動力取り出し装置と、該作業装置・動力取り出し装置を所定高さに支持する支持輪とを備えた作業機では、前記接地輪が硬度が不均一で傾斜の大きい土壌面のためにスリップして作業精度が悪化したり、草が接地輪やチェーンケース等の伝動部に絡まったりして、作業効率が低下する、という問題があった。【解決手段】トラクタ1の走行輪であるタイヤ66の進行方向直後方に、該タイヤ66の近くから順に前記支持輪28と接地輪11を列設すると共に、該接地輪11の転動面69を、前記タイヤ66と支持輪28とにより形成される共通鎮圧面である第2鎮圧面68の上に設けた。【選択図】図4
