| 摘要 |
PROBLEM TO BE SOLVED: To provide a door structure capable of not only achieving the functions for restoring a door to its original state when the door is temporarily warped or distorted and is temporarily deformed due to abrupt changes of temperature and humidity in its use environment or the way of using it but also keeping temperature and humidity of the air in an inside space constant to prevent the occurrence of warping and distortion. SOLUTION: This door structure is constituted in such a way that a plurality of vertical sashes 2a-2e are arranged in parallel on the right and left sides of the inside space 5 of a sash member 4 constituted by connecting upper and lower sashes 3a-3d respectively to upper and lower sections of and between the right and left vertical sashes, at least one of thin-walled metallic pipes T, T having square-shaped cross section is nipped and held in a clearance formed among the vertical sashes 2a-2e, both of side faces of both of the metallic pipes T, T are closely joined to any of and among the vertical sashes 2a-2e, and minute clearances C2, C2 are formed between surface members 9a and 9b on both of front and rear surfaces of both of the metallic pipes T, T while an intermediate sash 8 crossing a plurality of inner side vertical sashes 6, 7 is stored in the inside space 5 of the sash member 4. COPYRIGHT: (C)2010,JPO&INPIT
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