DRY DOUBLE-FLOOR STRUCTURE, FLOOR PANEL, AND SUPPORTING LEG

To provide a dry double floor structure, a floor panel, and a supporting leg capable of improving sound insulation performance.SOLUTION: On the back centers of conifer structural plywood 8, 15, a reinforcement band plate 10, 17 extending in a direction roughly orthogonal to a fiber direction Z in which a grain extends and a connection band plate 14, 19 extending along the back side edge of the conifer structural plywood are provided. The back side edge of the other of adjacent pieces of conifer structural plywood is mounted on the connection band plate of one of the adjacent pieces of conifer structural plywood and connected. Damping materials 9, 13, 16, and 18 are held between the conifer structural plywood and the reinforcement band plate and between the conifer structural plywood and the connection band plate. In the conifer structural plywood 8 supported and fixed along a wall 2 of a structural skeleton among the laid pieces of conifer structural plywood, a damping material fixing band plate 12 is fixed holding a damping material 11 for extension roughly in parallel to the fiber direction Z in which the gain extends in an extra space of the reinforcement band plate and the connection band plate. A supporting leg 4, 5 is provided with a damping material in the top surface, and supports the conifer structural plywood via the damping material of the top surface.SELECTED DRAWING: Figure 1 【課題】 遮音性能を向上する乾式二重床構造、床パネル、支持脚を提供する。【解決手段】 針葉樹構造用合板８，１５の裏面中央部に木目が延びる繊維方向Ｚと略直交する方向に延在する補強用帯板１０、１７と、針葉樹構造用合板の裏面側縁部に沿って延在する連結用帯板１４、１９と、を備え、隣接する一方の針葉樹構造用合板の連結用帯板に、隣接する他方の針葉樹構造用合板の裏面側縁部が載置されて連結され、針葉樹構造用合板と補強用帯板と間、及び、針葉樹構造用合板と連結用帯板との間に、制振材９、１３、１６、１８が挟持されるとともに、敷き並べられた針葉樹構造用合板のうち、構造躯体の壁２の際に沿って支持固定された針葉樹構造用合板８は、補強用帯板と連結用帯板との残余スペースに、木目が延びる繊維方向Ｚと略平行に、増設用の制振材１１を挟んで制振材固定用帯板１２が固定され、支持脚４，５は、天面に制振材を備え、該天面の制振材を介して針葉樹構造用合板を支持する。【選択図】 図１