| 摘要 |
PROBLEM TO BE SOLVED: To provide a bathtub lid hardly staining interconnection parts of plate materials, reducing the time and effort for cleaning and keeping the interconnection parts high in heat insulation performance and strength. SOLUTION: Hard and long plate materials 1 are interconnected in a parallel by freely bendable joint members 2, a front surface 6 and a back surface 7 are entirely formed into a flat surface, and the interconnection parts 3 of the plate materials 1 with each other corresponding to the joint members 2 are formed into a hollow shape. In the case of this invention, the cross sectional shape of the plate materials 1 is optional. It is preferable that the joint members 2 are formed by being provided with a reinforcing material 4 whose cross section is T-shaped for instance. COPYRIGHT: (C)2006,JPO&NCIPI
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