PROBLEM TO BE SOLVED: To provide a workpiece holding device in which failure of rotation of a rotary member caused by chips hardly occurs.SOLUTION: The workpiece holding device is arranged in a cutting apparatus in which positional relationship between a machining tool attached to a main spindle which moves to a Z-axis direction in a XYZ orthogonal coordinate system and a workpiece changes relatively and three-dimensionally. The workpiece holding device comprises: a base member in which first drive means is provided and a first rotary shaft rotating around an X-axis by the first drive means is provided an approximately L-shaped turning member in which the tip portion of the first rotary shaft is arranged near the one end of the turning member and which turns around an X-axis by the rotation of the first rotary shaft a drive member in which second drive means is provided and a second rotary shaft rotating around a Y-axis by the second drive means is provided, and which is arranged in a fixed manner in the other end of the turning member and a workpiece holding member arranged in a fixed manner in the tip portion of the second rotary shaft and holding the workpiece.COPYRIGHT: (C)2015,JPO&INPIT【課題】切削屑により回転部材における回転に不具合が生じにくいワーク保持装置を提供しようとするものである。【解決手段】XYZ直交座標系におけるZ軸方向に移動する主軸に取り付けられた加工工具とワークとの位置関係が相対的に3次元で変化する切削装置に配設されるワーク保持装置において、第1の駆動手段が設けられるとともに、上記第1の駆動手段によりX軸周りに回転する第1の回転軸が設けられた基台部材と、上記第1の回転軸の先端部が一方の端部近傍において配設され、上記第1の回転軸の回転によりX軸周りに回動する略L字形状の回動部材と、第2の駆動手段が設けられるとともに、上記第2の駆動手段によりY軸周りに回転する第2の回転軸が設けられ、上記回動部材の他方の端部に固定的に配設された駆動部材と、上記ワークを保持し、上記第2の回転軸の先端部に固定的に配設されたワーク保持部材とを有するようにしたものである。【選択図】 図3
