| 摘要 |
PURPOSE:To perform light movement with less resistance, by symmetrically providing screw mechanisms to both sides of a linearly transferred body. CONSTITUTION:A device is constituted in such a manner that a linearly transferred body 5 is positioned between both guide pillars 1, 1', and external thread members 6, 6' are rotatably and vertical axially relatively unmovably supported to both sides of said body further rotated and driven. The external thread members 6, 6' are arranged with many rollers 7, 7', freely rotating around their center cylinder and radially around a self axial line, throughout several pitches along the same spirals, and screwed to internal thread grooves 3, 3' from an internal opening of internal thread members 4, 4'. Said free rotating rollers 7, 7' are not provided with a point end engagement flange. |
