| 摘要 |
PROBLEM TO BE SOLVED: To provide a bolt coming-off prevention structure capable of preventing coming-off of the bolt certainly and facilitating to attach and detach the bolt. SOLUTION: The coming-off prevention structure for the bolt 16 that fastens a rotating object guard 7 to a stay 13 includes a washer 19 unseparably mounted onto a non-screw shaft portion 18b of the bolt 16; a cover member 24 having a ceiling plate portion 24a opposed to the washer 19; and an opening 25 formed in the ceiling plate portion 24a of the cover member 24. The structure is configured to enable switching between a bolt attachable/detachable position to permit passage of the washer 19 through the opening 25, and a bolt unattachable/undetachable position not to permit the passage of the washer 19 through the opening 25. COPYRIGHT: (C)2011,JPO&INPIT
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