| 摘要 |
PROBLEM TO BE SOLVED: To improve workability and an executing property including accuracy of an opening frame member used for an opening of a building such as a house, an office, an education institution, etc., to form a rectangular frame by mutually assembling the upper and lower lateral members and the right and left vertical members and fixing them, by forming a constitution having both advantages of a precut type and a preassembling type. SOLUTION: Lateral members of an opening frame member X are divided into separable base members 2 and decoration members 3 as elements. The base members 2 are assembled in vertical members 1 so as to be collapsible at the nearly central part, and unfolded from the folded and contained state when executing them and stretched to form a rectangular frame 4. The decoration members 3 are put on the confronting side faces of the base members 2 respectively so that a knock-down system can be executed. A hinge connection 5 is used for the collapsible element.
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