To provide a water storage institution of rainwater etc. having a skeleton block excellent in workability when conveyance and assembly are carried out by an operator, a space holding skeleton block structural body attaching a plurality of skeleton blocks and these skeleton blocks or the space holding skeleton block structural body capable of having a good prospect of the inside of the water storage institution of rainwater etc. and facilitating a visual check etc. therefor.
The skeleton block 4 forming a space holding skeleton 5 constituted by assembling a plurality of skeleton blocks 4 arranged in an excavated hole 2 has a flat plate-like base 41, supporting bodies 42 erected on one surface of the base 41 and having supporting body fitting sections 42a on the front end and base side fitting sections 43 provided to the base surface erecting the supporting bodies 42 on them and fitting the supporting body side fitting sections 42a, and when a pair of skeleton blocks 4 are made to oppose both surfaces erecting the supporting bodies 42 on them, each supporting body side fitting section 42a of one skeleton block 4 can be fitted to each base side fitting section 43 of the other skeleton block 4.
YAGIHASHI KIYOTOMO
SATO TOSHIYUKI
IKEUCHI MASATO
MATSUNAGA YOSHINORI
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