To surely seal between waterproof doors by obtaining a large pressing force with a simple configuration.
Projection thread parts 21, 21 which are mutually closed at a predetermined clearance at an erected position are formed on the edges of adjacent waterproof doors 3, 3, respectively, and arm members 24 are provided on the back face sides of the projection thread parts 21, 21, respectively, each of the arm member being turnable between an upright attitude of erecting along the projection thread part 21 and a toppled attitude of toppling lower than the waterproof door 3 and being provided with a water cut-off rubber 29 abutted astride and against the projection thread part 21 at the upright attitude. Each of the arm members 24 is provided with pressing means (a ring plate 30, an operation lever 34, a stopper bolt 36, and the like) which locks the arm member 24 to the projection thread part 21 at the upright attitude of the arm member 24 to energize the arm member 24 to the projection thread part 21 side, and presses the water cut-off rubber 29 against a whole length of the projection thread part 21.
MORI HIROSUKE
ITO SHINICHI
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