PROBLEM TO BE SOLVED: To provide an arm support device that supports the arm of a worker, in which a joint for turning a placement part for placing the arm around a shaft containing a vertical component is disposed in a proper position to improve operability.SOLUTION: As illustrated in (A), if an interval between a shaft J serving as a center of rotation around a vertical shaft of an arm holder (placement part) and an elbow E supported by the arm holder is less than 50 mm, a swing width of a finger-tip at the time when the arm holder is turned around the shaft J becomes large, and thereby work performance is lowered in the delicate work such as surgery. In contrast, as shown in (B), if the shaft J is in the wrist W side of 50 mm or more from the elbow E supported by the arm holder and passes the position of the elbow E side with respect to the wrist W of a fore-arm A, it becomes easy to control the movement of the finger-tip. Accordingly, the work performance of the work using the arm support device is improved.COPYRIGHT: (C)2015,JPO&INPIT【課題】作業者の腕を支持する腕支持装置において、前記腕が載置される載置部を鉛直成分を含む軸回りに回動させる関節を、適切な位置に配置して操作性を向上させること。【解決手段】(A)に例示するように、アームホルダ(載置部)の鉛直軸回りの回転中心となる軸Jとそのアームホルダに支持された肘Eとの間隔が50mm未満であると、アームホルダを軸J回りに回動させたときの指先の振れ幅が大きくなり、手術等の繊細な作業では作業性が低下する。これに対して、(B)に示すように、軸Jがアームホルダに支持された肘Eよりも50mm以上手首W側で、かつ、前腕Aの手首Wよりも肘E側の位置を通る場合、指先の動きをコントロールするのが容易となる。従って、その腕支持装置を用いた作業の作業性が向上する。【選択図】図5
