FLOOR STRUCTURE FOR GYMNASIUM AND LEVEL CUSHION ADJUSTING USED BOLT FOR FLOOR STRUCTURE

摘要

PURPOSE: A floor structure for a gymnasium and a level cushion adjusting bolt are provided to enhance moisture-proof property and vibration resistant property with a moisture-proof sheet and a waterproof veneer board and to minimize structural deformation, using an impact and noise absorbing, height adjustable, stable and cost-effective level cushion adjusting bolt. CONSTITUTION: A wet-proof sheet is attached on a concrete floor and level cushion adjusting bolts(30) are arranged on the wet-proof sheet at proper intervals. Then, a combination plywood is fixed on the level cushion adjusting bolt and a floor joist wood is perpendicular with the combination plywood. A waterproof veneer board is thinly layered on the combination plywood and the floor joist wood and a flooring board is put on the waterproof board. The level cushion adjusting bolt consists of a lower cushion rubber plate(31) made from 60 to 65 hardness of rubber with a through hole and a slant portion(33); a reinforced plastic cylindrical body(36) inserting the slant portion into a groove with a female thread portion; and a height adjuster(39) comprising an octagonal head(38) and a male thread portion(37). The octagonal head has many fine protrusions(40) and four recessed grooves(41). The recessed groove is combined with a rubber cushion plate(50) having a combination plywood supporter(52) to enhance impact absorbing and height adjusting functions.