PROBLEM TO BE SOLVED: To provide a coupling tool capable of preventing contact with a universal joint shaft regardless of the size of irregularity of a field in which farm work is performed or in the surroundings of the field.SOLUTION: A coupling tool comprises: a first coupling part 10 on a traveling vehicle side； and a second coupling part 20 on an agricultural implement side. The first coupling part comprises: a biforked expanded coupling rod 10B which is expanded along an axial direction of an axle SH of the traveling vehicle with a travel vehicle side as an open side； coupling bodies 10C each of which is supported at each of opposite ends on the open side of the expanded coupling rod, such that the end on the agricultural implement side is rotatable around an axis parallel to a shaft of the axle； and a coupling shaft 20A having an axis parallel to a shaft of the axle and protruding from an end of the traveling vehicle side of the coupling body.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】農作業を行う圃場や圃場周りの凹凸の大きさにかかわらず、ユニバーサルジョイント軸に対する接触を防止する連結具を提供する。【解決手段】走行車側の第１の連結部１０と、農作業機側の第２の連結部２０とを備えた連結具であり、第１の連結部は、走行車側を開放側として走行車の車軸ＳＨの軸方向に沿って拡開された二又状の拡開連結杆１０Ｂと、拡開連結杆の開放側の両端部の夫々に、農作業機側の端部が車軸の軸と平行な軸を中心として回転自在に軸支された連結体１０Ｃと、車軸の軸と平行な軸を有して、連結体の走行車側の端部に突設された連結軸２０Ａとを備えた。【選択図】図１
