| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a screw device capable of smoothly moving a rolling element from an unloaded area to a loaded area. Ž<P>SOLUTION: A restricting part 28 opposing a rolling element rolling groove 1a of a screw shaft 1 is provided to an end in the length direction of an unloaded return passage 10 of a circulation member 8. The rolling element 3 is sandwiched between the restricting part 28 and the rolling element rolling groove 1a of the screw shaft 1. By relatively rotating the screw shaft 1 with respect to a nut 2, the rolling element 3 sandwiched between the restricting part 28 of the circulation member 8 and the rolling element rolling groove 1a of the screw shaft 1 is drawn into a loaded rolling element rolling passage 12 or the unloaded return passage 10. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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