| 摘要 |
PROBLEM TO BE SOLVED: To materialize a low cost cross roller bearing by constructing a plug of a roller insertion hole and an attachment structure thereof in low cost. SOLUTION: A plug 9 is fixed on a roller insertion hole 8 formed on an inner ring 3 of a cross roller bearing 1. The plug 9 is a plastic moulding and pull off prevention plug side engagement projection parts 97, 98 are formed on both side surface thereof. Hole side engagement recess parts 87, 88 capable of engaging with the engagement projection parts 97, 98 are formed on an inner periphery side surface of the roller insertion hole 8. The plug 9 is inserted in the roller insertion hole 8 under a condition that the engagement projection parts 97, 98 are compressed, and the engagement projection parts 97, 98 elastically recover and engage with the corresponding engagement recess parts 87, 88 to prevent pull off of the plug 9. As the plug 9 has a simple structure and can be manufactured in low cost, it is advantageous to manufacture a low cost cross roller bearing.
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