| 摘要 |
PROBLEM TO BE SOLVED: To securely feed balls without distortion of a partition wall by constituting a ball guiding gutter with a ball guiding gutter and an independent partition wall. SOLUTION: A ball guiding gutter 9 is constituted of a ball guiding gutter body and an independent partition wall 18. The partition wall 18 forms plural concave-cross-sectional feeding passages and aligns and guides balls. The ball guiding gutter body 17 is formed with a backside wall contacting a mechanism board, a front wall 23 facing to this, a bottom wall 24, and a left side wall 25. A groove 26 with which the partition wall 18 fits to the bottom wall 24 and the left side wall 25 is formed with triangular ribs. These ribs are set at a height by which ball flow is not hindered. Through holes 27 corresponding to attaching pieces made on the partition wall 18 are provided in the groove 26 of the bottom wall 24, and shaft cylinders 28 are provided on the underside of the bottom wall 24. The partition wall 18 is fitted to the groove 26, and the attaching pieces 20 are inserted into the through holes 27 and fixed with screws 29. The partition wall 18 may be formed with ceramics. Thus, distortion of a partition wall can be prevented to ensure ball feeding.
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