| 摘要 |
PROBLEM TO BE SOLVED: To develop and provide a commercial product which is made of a sold natural wood and minimally changes in dimension. SOLUTION: It has been known that a board of wood inherently changes in dimension by 1-0.5 mm in the width direction and in the order of a micron in the longitudinal direction. Therefore, concaves and convexes fittable with each other are formed on the four sides of a solid natural wood board in the thickness direction. The boards are fitted both lengthwise and crosswise and adhered in part, which restricts dimensional changes only in the width direction of a board relative to one side of a product and in the order of a micron for the entire product. COPYRIGHT: (C)2007,JPO&INPIT
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