| 摘要 |
PURPOSE:To improve the accuracy in positioning by increasing a supporting stiffness, by engaging the supporting shaft of a roller with the engaging part formed on a bearing cage. CONSTITUTION:The bush 4 provided on the upper die 1 is slid along the guide post 3 provided on the lower die 2, when the upper die 1 is driven by opening and closing for the lower die by being driven in case of a pressing. The relative slide of this bush 4 and guide post 3 is guided by the roller 8 of a roller bearing device 5. This roller 8 has the recessed face part 8a and projecting face part 8b which come into contact with the guide post 3 and bush 4 respectively, so the supporting stiffness of the guide post 3 and bush 4 is high and the positioning of these both is performed with the accuracy.
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