PROBLEM TO BE SOLVED: To make an operators work easier and lighten workload of the operator in an operation where arms are lifted.SOLUTION: An arm supporting tool 100 comprises: a body fixing part 10 fixed to a body of an operator a right arm receiving part 20A and a left arm receiving part 20B installed to arms of the operator connection mechanisms 30A and 30B each of which connects a part of the body fixing part 10 and the vicinity of one end of the arm receiving parts 20A and 20B closer to a shoulder of the operator, and allows a posture change of the arm receiving parts 20A and 20B with respect to the body fixing part 10 for a movement of arms of the operator and posture maintaining mechanisms 40A and 40B which are provided between the body fixing part 10 and the arm receiving parts 20A and 20B, maintain the posture of the arm receiving parts 20A and 20B with respect to the body fixing part 10 in an antigravity manner in the state where the operator draws an elbow toward a body side by a predetermined amount or more or in the state where the operator moves the elbow away from the body by a predetermined amount or more, and support the arms of the operator.COPYRIGHT: (C)2015,JPO&INPIT【課題】腕を上げた状態での作業において作業者が作業しやすく、かつ、作業者の作業負担を軽減する。【解決手段】腕支持器具100は、作業者の胴体に固定される胴体固定部10と、作業者の腕に装着される右腕受け部20A、左腕受け部20Bと、胴体固定部10の一部と腕受け部20A、20Bの作業者の肩側の一端部近傍とを接続し、作業者の腕の動きにあわせて、腕受け部20A、20Bの胴体固定部10に対する姿勢変化を許容する連結機構30A、30Bと、胴体固定部10と腕受け部20A、20Bとの間に設けられ、作業者が肘を所定以上胴体側に寄せた状態又は前記作業者が肘を所定以上胴体から遠ざけた状態で腕受け部20A、20Bの胴体固定部10に対する姿勢を抗重力的に維持し、作業者の腕を支持する姿勢維持機構40A、40Bと、を備えている。【選択図】図1
