ROBOT ARM

To provide a robot arm in which while a required high torsional strength is secured, weight is sufficiently light by attaching a functional portion to a main body portion of the robot arm, the main body portion being formed as a thermoplastic setting FRP made, cylindrical body, and safety is high as a robot arm operating among human beings, with a human being, or assisting a human being, and particularly to provide a robot arm having a high fixing strength in the mounting portion of a mounting member.SOLUTION: In a robot arm 5, a closed space 10 is provided in a fitting portion of an inner side surface 6b of an end portion of a thermoplastic setting FRP made, cylindrical body 6 and a mounting member 9, and a composite resin layer 8b formed by combining a thermoplastic resin and fiber is molded in this closed space 10 under pressure and heat; a mounting member 9 assembled by its being fitted in an inside diameter of the end portion of thermoplastic setting FRP made, cylindrical body 6 and the thermoplastic setting FRP made, cylindrical body 6 are fastened to each other with a bolt 11; and the composite resin layer 8a formed by combining a thermoplastic resin and fiber is molded on an outer side surface 6a of the end portion of the thermoplastic setting FRP made, cylindrical body 6 under pressure and heat.SELECTED DRAWING: Figure 2 【課題】必要とされる高い捩り強度を確保しつつ、本体部分を熱硬化性ＦＲＰ製円筒筒体としてなるロボットアームの本体部分に機能部分を装着して充分に軽量でしかも人間の間で、人間と共にあるいは人間を補助して動作するロボットアームとして安全性が高いロボットアームであり、特に取付部材の取付部の固定強度が強いロボットアームを提供する。【解決手段】 ロボットアーム５は、熱硬化性ＦＲＰ製円筒筒体６端部の内側面６ｂと取付部材９の嵌合部に閉鎖空間１０を設けてこの閉鎖空間１０に熱硬化性樹脂と繊維を複合した複合樹脂層８ｂを加圧加熱成形し、熱硬化性ＦＲＰ製円筒筒体６の端部内径に篏合して組付けた取付部材９と熱硬化性ＦＲＰ製円筒筒体６相互をボルト１１で締め付けるとともに、熱硬化性ＦＲＰ製円筒筒体６端部の外側面６ａに熱硬化性樹脂と繊維を複合した複合樹脂層８ａを加圧加熱成形してなる。【選択図】図２