Water barrier device

Abstract

A water bather device includes: a water storage portion provided under a passage and a water barrier portion. In a first state, the water barrier wall is suspended and supported by the lid portion such that a space is formed by a lower end portion of the water barrier wall, a bottom surface of the water storage tank, and a side wall of the water storage tank. In a second state, the water barrier wall projects with respect to the passage through the opening. A first discharge port is connected is formed at a portion of the side wall of the water storage tank, the portion constituting the space, and a bottom surface of the water storage tank is inclined so as to become lower toward the first discharge port in a transverse direction of the passage.

1 . A water barrier device comprising:
 a water storage portion provided under a passage where people and vehicles go through; and   a water barrier portion accommodated in the water storage portion so as to be able to appear with respect to the passage, wherein   the water storage portion includes: a water storage tank configured to store water and be formed to extend in a transverse direction of the passage; a water intake portion through which the water is taken in the water storage tank; and an opening which is open on an upper portion of the water storage tank toward the passage,   the water barrier portion includes: a water barrier wall configured to appear with respect to the passage through the opening; a float portion formed integrally with the water barrier wall and configured to receive buoyant force from the water, stored in the water storage tank, to move up together with the water barrier wall; and a lid portion provided at an upper portion of the water barrier wall and configured to open and close the opening in accordance with up-down movements of the float portion and the water barrier wall,   in a first state where the water is not stored in the water storage tank, the lid portion contacts an inner peripheral portion of the opening to close the opening, and the water barrier wall is suspended and supported by the lid portion such that a space is formed by a lower end portion of the water barrier wall, a bottom surface of the water storage tank, and a side wall of the water storage tank,   in a second state where the water is stored in the water storage tank, the lid portion and the water barrier wall move up together with the float portion, and thus the water barrier wall projects with respect to the passage through the opening, and   a first discharge port to which a first discharge pipe through which the water stored in the water storage tank is discharged is connected is formed at a portion of the side wall of the water storage tank, the portion constituting the space, and a bottom surface of the water storage tank is inclined so as to become lower toward the first discharge port in the transverse direction of the passage.   
     
     
         2 . The water barrier device according to  claim 1 , wherein:
 the water barrier wall includes two wall plates arranged in parallel with each other; and   the float portion is arranged between these two wall plates.   
     
     
         3 . The water barrier device according to  claim 1 , wherein:
 a second discharge port to which a second discharge pipe through which the water stored in the water storage tank is discharged is connected is formed at the portion of the side wall of the water storage tank, the portion constituting the space;   a lowest point of the second discharge port is higher in position than a lowest point of the first discharge port; and   a valve configured to block the flow of the water according to need is provided on the first discharge pipe.