| 摘要 |
PROBLEM TO BE SOLVED: To completely prevent water from intruding from the tongue joint section between floor members 20 into the floor members in a flooring formed by joining, to each other, the floor members 20 in which a recessed groove 14 for a spline is formed in four peripheral end surfaces of a wooden formed plate 10 using a spline 15. SOLUTION: The recessed groove 14 for a spline is formed in the four peripheral end surfaces of the wooden formed plate 10 in a trilaminar structure having a core layer section 11 of low density and a front surface layer section 12 and a rear surface section 13 higher in density than the core layer section in such a manner that the core layer section 11 is removed. The spline 15 used for tongue joint is formed of a material manufactured by a material excellent in water resistance than the core layer section 11 of the wooden formed plate 10. COPYRIGHT: (C)2010,JPO&INPIT |
