| 摘要 |
PROBLEM TO BE SOLVED: To reinforce axial force of a screw bolt by shortening a supporting span of the screw bolt which rises and falls in an outer cylinder. SOLUTION: This supporter is provided with an upper outer cylinder 1 and a lower outer cylinder 2 vertically, coaxially and integratedly connected through a gear box 3, a screw bolt 8 which rises and falls in vertically outer cylinders by rotating a handle 15 provided on the gear box 3, and a slide pipe 9 whish integratedly connected with a top end of the screw bolt 8 whose an upper part is slidably protruded from an opening of a top end of the upper outer cylinder 1. A bearing ring 16 is arranged freely to vertically slide on an upper side from the gear box 3 and an outer circumferential surface of the screw bolt 8. The bearing ring 16 is held freely to vertically slide so as to freely fall from a cap 10 of a top end of the screw bolt 8 to a lowest end of a stick shaped rod 17 by the rod 17 dropped of a determined length. In addition, the rod 17 passes slidably through the cap 10, and a stopper part 17a for obstructing a fall is provided on its through end.
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