| 摘要 |
PURPOSE:To cause a moving body to accurately move straight without playing, by securing bearings to the moving body, and fitting the bearings slidably on a screw shaft. CONSTITUTION:A screw shaft 8 is coupled to a motor 7 as a driver. A nut 10 is screw-engaged on the screw shaft 8. Bearings 9a, 9b are secured to one side of a moving body 12 and coupled to the nut 11 by an elastic member 10. A guide 13 projects from another side of the moving body 12 and is slidably engaged on a guide rail 14. Since the screw shaft 8 also serves as a guide shaft, the rotative position of the screw shaft and the location of the moving body 12 are prevented from not corresponding to each other as in the case that the screw shaft and a guide shaft are separately provided. This results in enabling the smooth movement of the moving body 12. |
