| 摘要 |
PURPOSE:To make it into a wider variety and manufacturable at low cost. CONSTITUTION:In a coping ornamental ceiling consisting of a metal plate whose underside is formed into a decorative surface, a lot of flat panels 10, 11, 20, 21 with a rib 5 solidly bent to the backside at each side in an isosceles triangle are connected with one another successively at a part of the rib 5, thereby forming a concave spherical decorative surface consisting of many planes being connected as facing respective different directions. With being constituted like this, after a material is faced up, it is cut off and since a rib is solidly formable, it is manufacturable in low cost, so that owing to many planes facing different directions, the decorative surface is made into yet more full of variety. |
