| 摘要 |
PROBLEM TO BE SOLVED: To remove a frame without damaging an installed body by coupling a side plate and a movable block through a link mechanism to increase or decrease the gap between a pair of facing side plates. SOLUTION: A core 13 has a pair of side plates 2, 2, a bottom plate 3, and a bend plate 4 for linking the side plates 2, 2 and the bottom plate 3. Each side plate 2 is provided with a reinforcing frame 5 at an arbitrary interval and a link rod 8 is fixed, at one end thereof, rotatably to the upper end part of the frame 5 and, at the other end thereof, rotatably to the upper part of a movable block 14. When the frame is removed, removable stoppers 11, 11 are released and the movable block 14 is lifted. Consequently, the link rod 8 inclines to pull both side plates 2, 2 inward through toggle effect. Consequently, an air gap appears between an installed body 17 and both side plates 2, 2 applied tightly thereto and since friction can be eliminated, frame can be removed with small force without causing any damage onto the installed body 17.
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