JP7764307B2 - Flood prevention system - Google Patents

Description

The present invention relates to a flood prevention system for using a site as an emergency shelter during floods.

In many buildings, fences or walls are installed near the property boundaries to prevent others from entering the premises, but when considering measures to prevent flooding in the event of a flood or other water disaster, these may be used as flood prevention walls.

Patent Document 1 discloses a peripheral pressure barrier that extends around the entire perimeter of the building body, is higher than the maximum water level during floods, and has pressure resistance that can withstand water pressure and impacts from floating debris.

JP 2014-47495 A

Usually, waterproof doors, gates, and waterstops are installed at entrance and exit locations in the flood prevention walls. These doors, etc. are normally openable and can be closed during floods and other water damage.

On the other hand, if the building site is to be used as an emergency evacuation shelter in the event of a flood, then contrary to the above, it is necessary to provide doors etc. that can be opened in the event of a flood. However, there is a problem in that opening the doors etc. will allow water to flood into the site.

The present invention was made in consideration of the above problems, and aims to provide a flood prevention system that allows a site to be used as an emergency shelter in the event of a flood.

In order to solve the above-mentioned problems, the present invention provides a flood prevention system comprising a flood prevention wall that prevents water from flooding into an internal premises, a staircase that connects the internal premises with an external premises located outside the internal premises and prevents water from flooding into the internal premises, and a door that is provided in a wall at the boundary between the external premises and the outside of the premises on a route from the outside of a premises consisting of the internal premises and the external premises to the staircase, and that changes from a closed state that cannot be opened to an open state that can be opened when water floods outside the internal premises, wherein the door has a chamber that opens downwards provided in the door body, and a floating body is placed in the chamber, and the door changes from the closed state to the open state when the floating body floats up when water floods and removes a key that keeps the door in a closed state.
For example, the chamber forms a continuous space with a recess provided on the ground surface, the key is provided below the floating body, and in the closed state, the key is positioned so as to straddle the recess and the chamber, and when the floating body floats up during flooding, the key is released from the recess.
The door may also have the door body and a side post portion on the side of the door body, and an upside-down L-shaped recess may be provided on the surface of the side post portion facing the door body, the chamber of the door body may be connected to the recess, the key may be provided above the floating body, the tip of the key may be bent downward, and in the closed state, the tip of the key may be inserted into the bottom of the recess, and the floating body may float up when flooded, causing the tip of the key to come out of the bottom of the recess.

In this invention, the above-mentioned stairs can provide a permanent evacuation route that can connect to the interior premises during floods and other water damage while preventing flooding into the interior premises. Meanwhile, a door is installed to prevent others from freely entering the interior premises under normal circumstances, but this door automatically opens when flooded, so there are no problems with evacuation during floods. This allows the interior premises, which are protected from flooding by the flood prevention wall, to be ideally used as an emergency evacuation shelter during floods.

It is also desirable that the wall body has water permeability, and that the water-preventing wall has transparency.
In this invention , the external site located outside the internal site can be enclosed by a wall, preventing others from freely entering at all times. The door can be installed in this wall, allowing evacuation from outside the site in the event of a flood. Furthermore, since floating debris is blocked and stopped by the wall during a flood, the flood prevention wall does not need to have the strength to withstand collisions with floating debris, and can be made transparent by using glass or the like, providing excellent views and a sense of openness.

In the present invention, the door transitions to an open state when the floating body floats up in the event of flooding .
This allows for a simple structure for the door that opens when flooded.

It is also desirable that the door has an alarm means for notifying that the door is in the open state.
This allows nearby evacuees to be notified that the door is open, which helps with evacuation.

It is also desirable that the stepped side of the staircase be exposed to the outside of the internal premises.
This allows a boat or the like to be pulled up alongside the side of the stairs and used to evacuate from the stairs to the internal site, eliminating the need to move the boat or the like around to the end of the stairs and enabling evacuation in a short time.

This invention makes it possible to provide a flood prevention system that can be used as an emergency shelter on a site in the event of a flood.

A diagram showing the site 20 of a building 10 including a flood prevention system 1. FIG. 1 is a diagram illustrating the state of things during floods and other water damage. A diagram showing door 4. FIG. FIG. A diagram showing the door 4c. A diagram showing the door 4d.

The following describes in detail a preferred embodiment of the present invention with reference to the drawings.

(1. Flood prevention system 1)
1 is a diagram showing a site 20 of a building 10 including a flood prevention system 1 according to an embodiment of the present invention. Fig. 1(a) is a plan view of the site 20, and Fig. 1(b) is a perspective view of a portion of the site 20.

In this embodiment, the site 20 of the building 10 consists of an internal site 20a and an external site 20b located outside it, and the building 10 is located on the internal site 20a.

The flood prevention system 1 is installed to provide the internal site 20a as an emergency shelter in the event of a flood or other water disaster, and as shown in Figure 1(a), is composed of a flood prevention wall 2, stairs 3, doors 4, etc. In addition, a water-permeable wall 30 such as a fence or railing is installed on the outside of the flood prevention wall 2 at the boundary between the external site 20b and the outside of the site 20.

The flood prevention wall 2 prevents water from entering the internal site 20a and is installed to surround the internal site 20a. A portion of the flood prevention wall 2 is located at the boundary between the internal site 20a and the external site 20b. In the example of Figure 1(a), another portion of the flood prevention wall 2 is integrated with the wall of the building 10.

The flood prevention wall 2 is mainly made of concrete, but a transparent section 21 is provided at part of the boundary, providing excellent visibility and a sense of openness from the interior site 20a. The transparent section 21 is made of, for example, glass or reinforced plastic.

The stairs 3 connect the internal site 20a and the external site 20b, and are provided along the flood prevention wall 2 at the boundary between the internal site 20a and the external site 20b. More specifically, there is a location at the boundary where a pair of flood prevention walls 2 are parallel, and the stairs 3 are provided between the pair of flood prevention walls 2, extending along the flood prevention walls 2.

The staircase 3 is platform-shaped and has a pair of steps, one for ascending and one for descending. Each step is located on the external site 20b side and the other on the internal site 20a side, with the space between these steps being a higher elevation. Furthermore, as shown in Figure 1(b), the stepped side of the step on the external site 20b side of the staircase 3 is exposed to the external site 20b side.

Door 4 is installed on the path leading from the outside of the premises 20 to the stairs 3. More specifically, in this embodiment, door 4 is installed in the wall 30. When flooding occurs outside the internal premises 20a, door 4 transitions from a closed state in which it cannot be opened to an open state in which it can be opened.

Figures 2(a) and (b) show the situation during floods and other water damage in the same manner as Figures 1(a) and (b).

In this embodiment, in the event of a flood or other water damage, water W flows through the wall 30 into the external site 20b, but the flood prevention wall 2 prevents water from entering the internal site 20a.

Stairs 3 connect the external site 20b and the internal site 20a, but because staircase 3 is elevated as mentioned above, water W will not flow over staircase 3 into the internal site 20a. Evacuees, on the other hand, can enter the external site 20b by opening door 4, which has been opened by flooding, and then climb over staircase 3 to evacuate to the internal site 20a.

In addition, at the step on the external site 20b side of the staircase 3, the stepped side is exposed on the external site 20b side, so evacuees who enter the external site 20b in a boat B (see Figure 2(a)) or similar can pull up alongside the side and move from there up the staircase 3. Therefore, as shown by the dotted arrow in Figure 2(a), there is no need to move the boat B or similar around to the end of the staircase 3, and evacuation can be carried out efficiently in a short amount of time.

The symbol F in Figure 2(a) denotes a drifting object on the water W. Although the wall 30 of this embodiment is water permeable, it can block the drifting object F and prevent the drifting object F from entering the external site 20b. Therefore, at the boundary between the internal site 20a and the external site 20b, the flood prevention wall 2 only needs to be able to withstand the water pressure during flooding, and is not required to have the strength to withstand the collision of the drifting object F. Therefore, at the boundary between the internal site 20a and the external site 20b, a transparent portion 21 made of glass or the like can be provided on the flood prevention wall 2.

(2. Door 4)
The door 4 transitions from a closed state to an open state when flooded, and in the event of a flood, the door 4 can be opened to allow free entry into the external site 20b from outside the site 20. The door 4 of this embodiment is realized by a simple structure in which the floating body floats up when flooded, thereby opening the door 4.

Figure 3(a) shows an example of a door 4, in which a chamber 41 that opens downwards is formed inside the door body 40. This chamber 41 forms a continuous space with a recess 5 provided on the ground surface, and a levitation body 42 is placed in this space. Note that the wall body 30 is not shown in Figure 3(a). This also applies to the subsequent figures.

A key 420 is provided below the floating body 42. Normally, as shown in Figure 3(a), the key 420 drops into the recess 5 and is positioned so as to straddle the recess 5 and the chamber 41, keeping the door 4 in a closed state. On the other hand, when flooded, as shown in Figure 3(b), water W flows into the recess 5 and the chamber 41, causing the floating body 42 to float within the chamber 41. This disengages the key 420 from the recess 5, opening the door 4. The door 4, which automatically opens when flooded, may be installed on a wall 30 such as a fence or railing, separate from a door (not shown) normally used for people entering and exiting.

As explained above, according to this embodiment, the staircase 3 can be used to provide a permanent evacuation route that can connect to the internal site 20a during floods and other water damage while preventing flooding into the internal site 20a. Meanwhile, a door 4 is provided to prevent others from freely entering the internal site 20a during normal times, but this door 4 automatically opens in the event of flooding, so there are no problems with evacuation during floods. This allows the internal site 20a, which is protected from flooding by the flood prevention wall 2, to be ideally used as an emergency evacuation shelter during floods.

In addition, in this embodiment, by providing a water-permeable wall 30 on the outside of the flood prevention wall 2, the external site 20b can be enclosed by the wall 30, preventing others from freely entering at all times. A door 4 can be provided in the wall 30, allowing evacuation from outside the site 20 in the event of a flood. Furthermore, because floating debris F is blocked and stopped by the wall 30 during a flood, the flood prevention wall 2 does not need to have the strength to withstand collisions with floating debris F, and can be made transparent by using glass or the like, providing excellent visibility and a sense of openness.

In addition, in this embodiment, the door 4 that opens in the event of flooding is realized by a floating body 42, allowing for a simple configuration. Furthermore, the stepped side of the staircase 3 is exposed on the external site 20b side, so a boat B or the like can be pulled up alongside the side of the staircase 3 and evacuated from the staircase 3 to the internal site 20a. This eliminates the need to wrap the boat B or the like around to the end of the staircase 3, allowing for evacuation in a short amount of time.

However, the present invention is not limited to the above embodiment. For example, the door 4 is not limited to the one described in Figure 3. As an example, the chamber 41 does not have to be provided inside the door body 40, but may be attached externally to the door body 40, as shown in door 4a in Figure 4. This makes it possible to easily add opening and closing functions to existing door bodies 40.

Alternatively, as shown in door 4b in Figure 5(a), a rod-shaped member 421 extending upward from the floating body 42 may be passed through a through-hole 43 that penetrates from the chamber 41 to the top surface of the door body 40, so that the upper end of the rod-shaped member 421 protrudes from the top surface of the door body 40 when flooded, as shown in Figure 5(b).

This rod-shaped member 421 functions as a notification means to alert nearby evacuees that the door 4 has been opened in the event of flooding, thereby assisting in evacuation. It is possible to increase visibility by attaching a flag (not shown) or the like to the top end of the rod-shaped member 421. Additionally, various types of devices that audibly or visually notify that the door has been opened can also be used as notification means.

Also, as shown in door 4c in Figure 6(a), a key 422 may be attached above the levitation body 42, and when the levitation body 42 rises, the key 422 may be released, opening the door.

In the example shown in Figure 6(a), a side post 44 is provided on the side of the door body 40, and the upper end of the key 422 is folded back in a U-shape toward the side post 44. The tip is inserted into the lower part of an inverted L-shaped recess 45 provided on the surface of the side post 44 facing the door body 40.

When flooded, as shown in Figure 6(b), water W flows into the chamber 41 of the door body 40, causing the floating body 42 to float within the chamber 41. This causes the tip of the key 422 to rise and disengage from the bottom of the recess 45, opening the door 4c (door body 40).

In the example of Figure 6(a), the key 422 is attached to the levitation body 42, but as shown in door 4d in Figure 7(a), the key 411 can also be installed inside the chamber 41 of the door body 40.

In the example shown in Figure 7(a), a key 411 is rotatably mounted around a rotation axis 412 within the chamber 41 of the door body 40, and the tip of the key 411, bent downward, is inserted into the lower part of the recess 45.

Above the floating body 42, a booster 423 is provided to push up the key 411. In the event of flooding, as shown in Figure 7(b), water W flows into the chamber 41 of the door body 40, causing the floating body 42 to float within the chamber 41, and the booster 423 pushes up the key 411. This causes the key 411 to rotate, causing its tip to rise and disengage from the bottom of the recess 45, opening the door 4d (door body 40).

Furthermore, the arrangement of the building 10, internal site 20a, external site 20b, and wall 30 is not limited to the example shown in Figure 1(a). For example, multiple buildings 10 may exist within the internal site 20a. It is also possible to omit the external site 20b.

The positions and shapes of the flood prevention wall 2, stairs 3, door 4, etc. are determined according to the layout of the building 10, internal site 20a, external site 20b, and wall 30, and are not limited to the example shown in Figure 1(a). For example, if the external site 20b is omitted, the door 4 can be placed near the end of the stairs 3.

Furthermore, a pit (recess) (not shown) that serves as a water collection area may be provided in the internal site 20a, and water W that has seeped into the internal site 20a may be collected in the pit and then drained to the external site 20b using an attached pump or the like. The pit may also be configured to extend in the shape of a trench.

Furthermore, while the doors 4, 4a, 4b, 4c, and 4d in Figures 3 to 7 are opened by the floating body 42, the mechanism for the doors is not particularly limited as long as they are opened by flooding. For example, the doors may be configured with a sensor that detects flooding and a drive mechanism that opens the doors in response to the detection results.

Preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to these examples. It is clear that those skilled in the art will be able to conceive of various modifications and alterations within the scope of the technical ideas disclosed in this application, and it is understood that these also naturally fall within the technical scope of the present invention.

1: Flood prevention system 2: Flood prevention wall 3: Stairs 4, 4a, 4b, 4c, 4d: Door 10: Building 20: Site 20a: Internal site 20b: External site 21: Transparent section 30: Wall body 40: Door body 41: Room 42: Floating body

Claims (7)

A flood prevention wall that prevents water from entering the internal premises;
a staircase that connects the internal site with an external site located outside the internal site and prevents flooding into the internal site;
a door that is provided in a wall at a boundary between the external site and the outside of the site on a path from the outside of the site consisting of the internal site and the external site to the staircase, the door transitioning from a closed state that cannot be opened to an open state that can be opened when the outside of the internal site is flooded;
and
The door has a chamber that opens downward in the door body,
A levitation body is disposed in the chamber,
A flood prevention system characterized in that the door transitions from the closed state to the open state by the floating body floating up when flooded, removing the key that keeps the door in the closed state . The chamber forms a continuous space with a recess provided on the ground surface,
The key is provided below the levitation body,
In the closed state, the key is disposed so as to straddle the recess and the chamber,
2. The flood prevention system according to claim 1, wherein the floating body floats up when flooded, causing the key to be removed from the recess. The door includes the door body and a side post portion on a side of the door body,
An inverted L-shaped recess is provided on the surface of the side post portion facing the door body,
The chamber of the door body communicates with the recess,
the key is provided above the levitation body,
The tip of the key is bent downward,
In the closed state, the tip of the key is inserted into the lower part of the recess,
2. The flood prevention system according to claim 1, wherein the floating body floats up when flooded, causing the tip of the hook to come off from the bottom of the recess. 2. The water ingress prevention system according to claim 1, wherein the wall is water permeable . 5. The water intrusion prevention system according to claim 4 , wherein the water intrusion prevention wall is transparent. 6. The flood prevention system according to claim 1 , wherein the door has an alarm means for notifying that the door is in an open state. The flood prevention system described in claim 1, characterized in that the stepped sides of the stairs are exposed to the outside of the internal premises.