| 摘要 |
PROBLEM TO BE SOLVED: To facilitate application of a preload, and to easily apply the preload when preventing the occurrence of a backlash by operating the preload between a nut body and a screw shaft in a feed screw mechanism composed of the nut body and the screw shaft threadedly opposed to this. SOLUTION: A nut body 2 is constituted by connecting a first nut body 2a and a second nut body 2b in a series state, and a connecting part of the first nut body 2a and the second nut body 2b is a relatively freely rotatable/ fixable in connecting structure part.
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