To heighten the strength of a decorative laminated sheet and to partly replace the decorative laminated sheet.

A first rectangular decorative laminated sheet 14-1 in which a fire hydrant door 18 and a maintenance door 22 are disposed to be freely opened and closed is provided on the front of a first casing 12-1, and a second rectangular decorative laminated sheet 14-2 in which a reporting device door 24 and a fire extinguisher door 32 are disposed to be freely opened and closed is provided on the front of a second casing 12-2. The first decorative laminated sheet 14-1 and the second decorative laminated sheet 14-2 are divided into a pair of confronting frame members including hinges 21, 23, 24a, 32a as door shaft parts; and a pair of confronting frame members not including the door shaft parts, and the divided frame members are connected to each other to construct a frame-like rectangular frame body.