| 摘要 |
PROBLEM TO BE SOLVED: To provide a jack device capable of remarkably simplifying and preparing the attaching working of a bridging member, and corresponding to the linear disposition and orthogonal disposition of a plurality of the bridging members. SOLUTION: A jack support 1 has a male screw part on the outer periphery, has a base 10 on one end of an axial direction, and the other end side is a free end. A movable body 2 includes a base body part 20 and bridging connection parts 21-24. The base body part 20 is combined in the jack post 1, and can move along the axial direction of the jack post 1. The bridging connection pats 21-24 are parts for connecting for post members, which are provided with the circumference of the base body part 20 at different angles. Tightening means 31, 32 are screw-coupled on the male screw part of the jack post 1, the movable body 2 is fixed on the jack post 1 or fixing is released.
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