| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of an opening having small decline of a door. SOLUTION: The opening structure includes a door frame 10 having a head 12 and both right and left jambs 14, the door 1 mounted to the opening section 24 formed of the door frame 10 and a floor 22 and an upper hinge 26 and a lower hinge 46 for supporting the door 1, the floor 22 is mainly formed of a woody material, and the upper hinge 26 and the lower hinge 46 support the door 1 between the head 12 and the upper butt end 3 of the door and the lower butt end 5 of the door and the floor 22 in an openable manner. The upper hinge 26 and the lower hinge 46 support the door 1 in front near to the one side of the door 1 with pins 40 and 60 located on the front side from the front end 15 on the front side of each jamb as the centers in an openable manner. COPYRIGHT: (C)2004,JPO
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