| 摘要 |
PURPOSE: A case for amplifier is provided to prevent the deformation of the case due to the pressure of concrete during a pouring process of concrete by forming a projecting rib from a back side of the case. CONSTITUTION: A case for amplifier includes a bottom side(8), a base(10), a sidewall, an intermediate projection portion(22), an upper projection portion(20), and a flange portion. The bottom side has a shape of rectangle. The base and the bottom side are formed into the one body. The base is projected from the bottom side. The sidewall is formed on an edge of the bottom side in a vertical direction. The intermediate projection portion is formed on an intermediate portion of the sidewall. The upper projection portion is formed on an upper end portion of the sidewall. The flange portion is formed on an external end portion of the upper projection portion. A groove(60) is formed on the base.
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