PROBLEM TO BE SOLVED: To provide: a corner member of the ceiling cornice section used for the gap between the siding forming the external wall of a building, and the mounting member of a window frame or the like which is easy in construction, does not take time for construction and has excellent appearance; a structure thereof; and a mounting method for the corner member of the ceiling cornice section.;SOLUTION: The corner joint member of the ceiling cornice section is used for the gap between the siding forming the external wall of the building, and the mounting member of the window frame or the like. The corner joint member comprises a cover member 1 for covering an outside surface of a siding-end covering plate body of the ceiling cornice section, and a retainer member 2 which is attached to the backside of the cover member 1 so as to abut on the inside surface of the siding-end covering plate body. Gaps 20 and 21 capable of receiving the siding-end covering plate body and holding it in a sandwiching state are provided between the cover member 1 and the retainer member 2.;COPYRIGHT: (C)2013,JPO&INPIT
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