| 摘要 |
PURPOSE:A straight rail of adjustable length on which a swingable rail is provided on each end so that these swingable rails can form desired angles on a movable bed. CONSTITUTION:The swingable rails 6 which are pivoted at bearings 5 respectively to swing along respective guide grooves 8 in arc shape for adjustment of angles are provided on a pair of movable beds 4 which can move left and right along guiding surfaces of tables 3. A fixed rail 9 with a fitting face on each end to fit with a corresponding rounded end 6a of each swingable rail is provided on the movable bed 4. The straight rail 12 consists of an underside rail 11 which is fitted by dovetail jointing on upside rails 10 on both sides which are screwed on the fixed rail 9. This construction can facilitate fabrication of coiled conductors in multiple shapes and sizes with less preparatory time by varying a length l1 of the straight line and an angle theta1 formed with the swingable lever 6. |
