| 摘要 |
<p>A movable table is provided with a guide rail, a movable block capable to move along with the guide rail, a driving means, and a power transmitting means transmitting from the driving means to the movable block; the movable block has a hole to contain the power transmitting means therein, and a bearing is formed between the guide rail and the movable block, and therefore, when a pre-load is applied on the movable block, the parts thereof on which the bearing is formed do not bend in any direction, and proper pre-loaded state is constantly kept.</p> |
