| 摘要 |
PROBLEM TO BE SOLVED: To provide a tongue joint structure of wooden floor materials allowing a tongue to be fixed to floor backing with a nail with high working efficiency and firmly joining the floor materials to each other without a joint gap after tongue joining. SOLUTION: This tongue joint structure of the wooden floor material is constituted by extending the male tongue 1 and a female groove 2 at the side end faces of the adjacent wooden floor materials A and connecting the tongue 1 and the groove 2. A nail hole is bored obliquely downward in a body of the wooden floor material A from the root upper corner part of the projecting part of the tongue 1, and the nail hole is formed in tapered shape gradually reduced in hole diameter. The nail hole 31 is a through-hole penetrating the wooden floor material body obliquely downward. Nail holes 32, 32 are half-through-holes having no opening in the back face of the wooden floor material body. COPYRIGHT: (C)2008,JPO&INPIT
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