| 摘要 |
PROBLEM TO BE SOLVED: To develop a reinforced rain shutter door, by which a comfortable life can be led by natural air without using an air conditioner in an indoor section extending over spring or autumn. SOLUTION: The door frame bodies 1, 1 of the rain shutter door are formed to a hinged door and the opened door frame body 1 is formed in a twofold shape. Each frame consists of left-right stiles 1a and upper-lower rails 1b respectively, a plurality of horizontal muntins 3 are installed at regular intervals while maintaining proper vent holes 2 in parallel with the upper-lower rails 1b, and insect nets 4 are mounted towards the left-right stiles 1a and the upper- lower rails 1b of the door frame body 1.
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