| 摘要 |
PURPOSE:To assemble respective parts with good accuracy by positioning a sliding table, a ball holding base and a ball holding plate of ball holding means fixed to the sliding table and a cover only according to the relation of 1:1 between two parts. CONSTITUTION:A ball holding base 2a is fixed to the lower surface side of a horizontal portion 6 in a recess portion 8. A ball holding plate 2b is fixed below the lower surface side of each sleeve portion 7 to form a pair of load ball grooves formed on the respective sleeve portion 7. A cover 3 comprises a cover main body 3a and R-piece 3b. Further a ball circuit is formed by a peripheral edge portion of a slot formed on the cover main body 3a and a peripheral groove formed on the R-piece 3b. In this arrangement the positioning of a sliding table 1, the ball holding base 2a and the ball holding plate 2b of ball holding means 2 fixed to the sliding table 1 and the cover can be determined according to the relation of 1:1 between two parts. Accordingly the parts can be put together with good accuracy.
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