| 摘要 |
PROBLEM TO BE SOLVED: To resolve a problem of a conventional air bag type flap gate wherein water leakage between a top face of a bearing-cum-pressing plate and an upstream face of a lower part of a steel plate door body can be completely prevented since a rubber plate forming water-tightness in a lower part is attached to each of the top face and the upstream face by a bolt and pressing plate, but it is difficult to accurately match a size in a weir width direction of an opened edge of an air bag when it is pressed against a waterway bottom by an anchor bolt and a pressing plate and fixed to the waterway bottom for sealing with a weir width, a gap easily occurs between both end parts of the air bag and side face door stops, and sometimes there is leakage. SOLUTION: A portion of an edge of the air bag manufactured in an opened state and pressed by the pressing plate is bonded in an adhered state before installation, and rubber protrusion parts with end faces that are aligned planes and a size between the end faces accurately matching the weir width of the roof gate are provided on both side end outer sides of the portion. COPYRIGHT: (C)2004,JPO
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