| 摘要 |
PROBLEM TO BE SOLVED: To provide a frame body which is enhanced in the assembling efficiency of a frame body and its appearance design and is improved to secure a rigid frame body superior in mechanical strength, and to provide a frame body fitted with a door.SOLUTION: The frame body 2 to be fitted in the opening of a duct wall includes a vertical frame member 4, a horizontal frame member 5 and a connection member 6 connecting/fixing the frame members at a square corner. The vertical and horizontal frame members include webs 4b, 5b arranged facing with each other on the inner side edge of the opening, first flanges 4c, 5c extended from the webs and arranged facing with each other on the duct wall around the outside of the opening, and first lips 4d, 5d extended to the duct wall side from the first flanges. The connecting member has an L-shaped flat surface, and has, on the duct wall of the first flanges of the vertical frame member, a vertical connection plate piece 6a fixed to the opposite rear surface, and also has, on the duct wall of the first flange of the horizontal frame member, a horizontal connection plate piece 6b fixed to the opposite rear surface. The outside edge of the connection plate piece 6c between the vertical connection plate piece and horizontal connection plate piece is formed into an outward round shape, forming a connection lip on the outside edge, connected in succession to the first lip of the vertical and horizontal frame members. |
