| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an expansion device for installation within a pavement height that prevents a floor slab from cracking, has high durability, and is mass-produced. <P>SOLUTION: One and the other expansion devices 18 and 19 comprise one-side and other-side comb-shaped load bearing members 18A and 19A of predetermined length which are sectioned substantially in a T shape and has uneven surfaces formed on upper surface parts thereof; and pluralities of one-side and other-side substantially hook-shaped rib plates 18B and 19B which are orthogonal to and fixed to outer side faces of the one-side and other-side comb-shaped load bearing members 18A and 19A, and are fixed to the one-side and other-side comb-shaped load bearing members 18A and 19A at predetermined intervals along lengths. Specifically, the one and other expansion devices 18 and 19 comprise the one-side and other-side comb-shaped load bearing members 18A and 19A of predetermined length L<SB POS="POST">1</SB>, for example, approximately 1.8 (m) made of, for example, steel; and the one-side and other-side substantially hook-shaped rib plates 18B and 19B which are orthogonal to and fixed to the outer side faces of the one-side and other-side comb-shaped load bearing members 18A and 19A, i.e. outer side faces of leg parts 18c and 19c. <P>COPYRIGHT: (C)2013,JPO&INPIT |
