| 摘要 |
PROBLEM TO BE SOLVED: To improve working efficiency in connecting a first arm to a second arm, to reduce the cost, and to improve the appearance of the arms. SOLUTION: A connecting body turned by a servomotor is rotationally supported to a bearing installed in the tip opening part of an upper arm 25 and a wrist 26 connected to the connecting body according as the turning of the servomotor is turned. In a state of connecting the wrist 26 and the connecting body to each other beforehand, the connecting body is inserted and installed from the tip end opening part of the upper arm 25 and a bearing presser flange 45 is fitted to the upper arm 25 so that the upper arm 25 and the wrist 26 are connected to each other. The wrist 26 is turned to the upper arm 25 to allow a bolt hole 45a of the bearing presser flange 45 to emerge, and the bolt is threadly engaged through the bolt hole 45a so that the bearing presser flange 45 can be installed with the bearing positioned in the upper arm.
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