| 摘要 |
PROBLEM TO BE SOLVED: To lower the minimum height of a table by reducing the fluctuation of a lever ratio and reducing the maximum lever ratio while supporting the rigidity of an X-link mechanism in an inexpensive and simple constitution. SOLUTION: Lever links 15A, 15B in which cams 18A, 18B are formed at the periphery the links are jointed to the inner link 5 and the outer link 6 of a table lift 1 respectively for rotation freely, both ends of a ball screw 32 are jointed to the eccentric positions of the rotation centers of the lever links 15A, 15B respectively, the lever links 15A, 15B are synchronously rotated corresponding to the extension/contraction of the ball screw 32. Cam rollers 25A, 25B rolling along the cams 18A, 18B corresponding to the rotation of the lever links 15A, 15B are provided at the X-link mechanism 4, thus extending and contracting the X-link mechanism 4 in a vertical direction through the cam rollers 25A, 25B by the rotation of the lever links 15A, 15B corresponding to extension/contraction of the ball screw 32. COPYRIGHT: (C)2011,JPO&INPIT |
