| 摘要 |
The door hinge is constructed with a leaf (1), fitted to the door and a second leaf (2), fitted to the frame. The first section is formed from a piece of sheet steel, which is formed into a U-shape, consisting of a central section (3), with two perpendicular primary wings and the extended with two secondary wings (6,7), parallel to the central section The two leaves are linked by a common axis (8), which passes through the two primary wings of the first leaf and the two wings (10,11) of the second leaf. This second leaf is fixed to the frame by means of a bearing plate, which is approximately flat, and which has a central rectangular opening (9a).
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