| 摘要 |
PURPOSE:To facilitate adjustment of a gap between side grooves and to avoid mechanical play by inserting rolling members between a side groove of a movable portion and a side groove of a fixed portion confronting with the movable portion, and pressing the fixed portion to the movable portion. CONSTITUTION:V-grooves 32 are formed on both sides of a movable portion 31, and V-grooves 36, 37 are formed opposite to the above grooves 32 on fixed portions 33, 34 fixed to a fixed chassis 35 in such a manner as to clamp the movable portion 31 from both sides. Plate springs 41 are interposed between a side wall 40 formed on one side of the fixed chassis 35 and one fixed portion 33 fixed to the fixed chassis 35 by elongated holes 38 and screws 39 in such a manner as to move slightly forward and backward, thereby to urge the fixed portion 33 to the movable portion 31. Rolling members 42 are inserted between the grooves 32, 36 and between the grooves 32, 37, respectively. In this arrangement, the adjustment of gaps between the grooves 32, 36 and between the grooves 32, 37 can be facilitated, a difference in size and deformation of the rolling members 42 can be allowed, and mechanical play is avoided. |
