Patent ID: 6354762
Filing Date: 2002-03-12
Classification: E02B

Abstract:
A mounting member used in a flexible membrane dam which is formed by a flexible expanding-and-contracting structural body which is formed from a flexible membrane and is made to stand by a fluid being supplied to an interior thereof and made to collapse by fluid being discharged from the interior thereof; and a structure at which the flexible expanding-and-contracting structural body is provided, said mounting member comprising:a first member and a second member, wherein said first member is designed to be provided at the structure for abutting one surface of the flexible membrane, said second member is designed to be opposite the first member for abutting another surface of the flexible membrane, such that a vicinity of an outer peripheral edge of the flexible membrane is nipped by a fixing means between said first member and said second member, at a surface of the first member for abutting the flexible membrane, first concave portions and first convex portions, which extend in a direction that is orthogonal to the outer peripheral edge of the flexible membrane when the mounting member mounts the flexible membrane, are provided alternately along the outer peripheral edge of the flexible membrane when the mounting member mounts the flexible membrane, at a surface of the second member for abutting the flexible membrane, second convex portions which oppose the first concave portions and second concave portions which oppose the first convex portions are provided alternately along the outer peripheral edge of the flexible membrane when the mounting member mounts the flexible membrane, whereby when the mounting member mounts the flexible membrane a length L1 of the flexible membrane, in a state in which the flexible membrane is set in close contact with bottom surface of the second concave portion, from a flexible membrane outer peripheral edge side end portion of the second concave portion to an end portion of the second concave portion at a side opposite the flexible membrane outer peripheral edge side of the second concave portion, and a length L2 of the flexible membrane, in a state in which the flexible membrane is set in close contact with peak surface of the second convex portion, from a flexible membrane outer peripheral edge side end portion of the second convex portion to an end portion of the second convex portion at a side opposite the flexible membrane outer peripheral edge side of the second convex portion, are substantially equal.