| 摘要 |
A backflow prevention cap for panels having interlocking-folds, which prevents a backflow of water into seamed panels through fine gaps between the interlocking folds of the seamed panels by wind action. Each of panels has a tetragonal panel body ( 7 ), outer interlocking folds ( 9 ) provided by folding outwardly two neighboring sides of the panel body, and inner interlocking folds, ( 11 ) provided by folding inwardly two remaining sides of the panel body. The backflow prevention cap includes a water shielding part ( 3 ) having a sheet-shaped wedge structure to be installed in the top ends of the outer interlocking folds ( 9 ) of each panel and supported in the top ends of the outer interlocking folds by a locking means when the panels are continuously seamed together through a fold-interlocking method.
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