| 摘要 |
PURPOSE:To accurately move both support in parallel, by providing a tension member to both supports under tension through a tension adjusting jig and a guide so that the tension directions thereof are become opposite to each other. CONSTITUTION:If a slide base 4 is pulled to a forward side by a tension member 16 under the actions of a drive device 20 and a guide 10 in order to move a moving body 2 to the forward side, the same tension is also simultaneously transmitted to the front surface side part Yc of the other slide base 5 by the tension member 17 provided to the rear surface side part Yb of the slide base 4 under tension and by guides 13-15. Therefore, only by the action to one side, the other side receives action simultaneously, in other words, action is applied to both slide bases so as to simultaneously pull both of them and, after all, both slide bases move to the forward side equally in parallel as the moving body 2 without generating the positional shift of the whole.
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