| 摘要 |
PROBLEM TO BE SOLVED: To ensure the easiness of attaching operation and attaching strength of a piece cover onto an arm piece by devising the shape of the piece cover to the way to mount the piece cover onto the arm piece. SOLUTION: By devising the arrangement of a side abutting part 36 equipped on the piece cover 30 depending on a non-interference area A and an interference area B during mounting with respect to the arm piece 16, the piece cover 30 is easily mounted onto the arm piece 16 with high operability by means of insertion in a direction along the longitudinal direction of the arm piece. Additionally, the attaching strength is improved by equipping the piece cover 30 with a bottom abutting part 38 brought into abutment against the bottom of the arm piece 16. COPYRIGHT: (C)2009,JPO&INPIT
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