JP7556664B2 - Building flood prevention device - Google Patents

Description

The present invention relates to a device for preventing water from entering a building through a drainage ventilation hole in the foundation of the building, a building equipped with the device, and a method for preventing water from entering a building to which the device is applied.

There have been cases of flood damage above and below the floors of buildings in areas expected to be inundated by floods, storm surges, etc., and there are fears of further flooding. One of the reasons for this is the lack of progress in the development and widespread use of effective and easy-to-install flood prevention devices that prevent water from entering buildings through ventilation holes in foundation drains, which are where a large amount of water enters buildings.
In conventional foundation drains with ventilation holes, measures have been proposed to prevent water from entering the building through the ventilation holes, including the provision of a float-type waterproofing member inside the foundation drain to block the ventilation holes (see Patent Document 1), a gasket member inside the foundation drain that is manually moved to block the ventilation holes (see Patent Document 2), and many other technologies.

Patent application 2015-229898 Patent Publication No. 2021-067158

However, in the case of the technology of Patent Document 1, it is possible that fine floating particles may get inside the base drain when it is submerged, causing problems with the operation of the waterproofing material inside the base drain.
Furthermore, with the foundation drain in Patent Document 2, when manually moving the gasket member inside the foundation drain to block the ventilation holes, if there are objects that are difficult to move near the building, such as a wooden deck or an air conditioner outdoor unit, these get in the way and make it difficult to move the gasket member.

Furthermore, in the case of existing buildings, both of the inventions of Patent Documents 1 and 2 require replacement work to replace the existing foundation drainage with the invention, which requires considerable expenses, etc. In addition, even with other invention technologies, the manufacturing costs are likely to be considerable due to the complex structure for preventing water from entering through the foundation drainage ventilation holes.

Therefore, it is expected that the device to prevent water ingress through foundation drain ventilation holes will become more widespread, as it can reliably block ventilation holes, does not require replacement work of the foundation drain even in existing buildings, and can be installed relatively inexpensively.

The present invention is a flood prevention device that reduces anxiety about flood damage and prevents water from entering through the foundation drain ventilation holes by blocking the ventilation holes in the foundation drain with a waterproof material when flooding is predicted, etc., with the goal of making the installation costs relatively low and making the task of blocking the ventilation holes with waterproof material simple and reliable.

In order to solve the above problems and achieve the above goals, the building water ingress prevention device of the present invention is characterized in that a waterproofing member shaped to completely block the foundation drain ventilation hole is inserted into the foundation drain at several locations (depending on the shape of the building, etc.) or into a waterproofing member fixing member, and fixed in place to block the ventilation hole and prevent water ingress through the ventilation hole.

The present invention will be outlined below.
This building water ingress prevention device fixes the waterproofing material, which is shaped to cover the ventilation holes of the foundation drain, to the foundation drain without using fixing devices (tools, screws, etc.). It is sufficient to use water-resistant adhesive tape only to the extent necessary to increase watertightness.

In addition, by attaching a fixing member for fixing the waterproof member that blocks the ventilation hole to a conventional base drain that does not have a function for fixing the waterproof member in advance by screwing or the like to the base drain, it is possible to fix the waterproof member without using fixing tools, just like a base drain that has a function for fixing the waterproof member.

Furthermore, when fixing the waterproofing member, the ventilation hole can be blocked by a simple method of inserting the waterproofing member along the bottom wall of the base drain and pushing it into a specified position, so that the fixing work can be easily and reliably performed by one person in a short time.

When fixing the waterproofing material to the base drain, no tools, screws, etc. are required, and there is no need to use a lot of water-resistant adhesive tape, so when the waterproofing material is removed, no screw marks are left behind and only a small amount of adhesive tape remains.
Furthermore, if water-resistant adhesive tape is used extensively, once the adhesive tape is used when flood damage is predicted, new adhesive tape must be prepared. However, with the present invention, there is no need to prepare large amounts of adhesive tape, which is extremely advantageous in terms of cost, and makes it possible to fix waterproofing materials to the foundation gutters early and without hesitation when flooding is predicted.
Furthermore, as described above, it is now possible to prevent water ingress even in conventional foundation drip-lines by retrofitting the fixing members for the waterproofing members using a simple method such as screw fastening.

Furthermore, because the waterproofing members do not impede daily life even when they are fixed to the foundation drain, disaster preparation measures can be taken by fixing the waterproofing members at an early stage before a typhoon occurs or heavy rain or flood warnings are issued.It is also a method of preventing flooding in buildings that can be used as one of the flood disaster prevention measures for the entire area, with the cooperation of neighborhood associations, local governments, etc.

The outline of the present invention will be explained. First, in buildings that require underfloor ventilation, the installation of ventilation holes (air vents, etc.) around the foundation is stipulated by law. However, in the event of a flood, a large amount of water will seep in through these ventilation holes, so the biggest challenge in preventing flooding of buildings is to strike a balance between normal ventilation and flood prevention.
Therefore, we provide a building flood prevention device that, when flooding is predicted, inserts waterproofing material into a foundation drain or fixing member having ventilation holes at several places (if possible) and fixes it in a specified position to temporarily block the ventilation holes, thereby preventing water from flooding into the building through the foundation drain ventilation holes.

As described above, the present invention has realized a device that prevents water from entering a building through a foundation drain ventilation hole by simply and reliably blocking the foundation drain ventilation hole through a technique that has not been proposed by those skilled in the art (in the fields of architecture, disaster prevention, and administration) or by the conventional technology, in which waterproofing materials are inserted into the fixed functional parts of the foundation drain from at least a few places and fixed without using tools, etc. This device can also be attached to existing buildings.
Furthermore, since the structures and shapes of the components are not complicated and there are no automatic or moving parts, the equipment is relatively resistant to problems such as breakdowns and is easy to maintain.

The present invention will be described in detail starting from claim 1.
The invention described in claim 1 is composed of a waterproofing member molded into the necessary shape to prevent water from entering the building through the ventilation holes provided in the bottom wall of the foundation drain, and a foundation drain having the function of inserting the waterproofing member and fixing it in place by adhering it to the ventilation holes.

Conventionally, as in the above-mentioned patent documents, a technology has been proposed in which a movable waterproofing member is provided inside a foundation drain, but when immovable items such as a wood deck or an air conditioner outdoor unit are installed close to the foundation drain, these items get in the way, and manually fixing the waterproofing member takes a long time. Furthermore, it is difficult to visually confirm whether the ventilation holes are blocked, and even if it is confirmed that they are not blocked, it is difficult to take emergency action.

In order to prevent water from entering through the foundation drain ventilation hole, if the ventilation hole is not partially blocked in even one place, it will be impossible to prevent water damage.
However, foundation drainage vents are installed around almost the entire perimeter of a building, and many buildings also have wooden decks, etc.
Therefore, even if a wooden deck or the like is installed close to the foundation drain ventilation hole, a challenge that needed to be overcome in order to prevent water from entering through the foundation drain ventilation hole was to simply and reliably seal the ventilation hole that extends around almost the entire circumference of the building with waterproof material.

The present invention solves some of the problems that were difficult with the conventional technology, and provides a building flood prevention device that quickly and reliably blocks the entire foundation drain ventilation hole. In addition, as described below, the structure is simple, so the manufacturing costs, transportation costs, installation costs, maintenance costs, etc. can be kept low.

The waterproof member of the present invention is a molded product having water resistance and durability and made of metal, resin, rubber, etc. The material may be a single material or a combination of different materials.
For example, a combination of metal and sponge may be used. In this case, the waterproofing material adheres closely to the ventilation hole due to the pressing force caused by the restoring action of the elastic material such as sponge, thereby improving the watertightness around the ventilation hole.
In addition, to improve watertightness, a gasket, water-absorbent material, or water-expandable material may be attached to the part where the waterproof material comes into contact with the base drain ventilation hole, etc., or the above-mentioned gasket, etc. may be attached around the base drain ventilation hole.

The function of the foundation cutter of this device is the same as that of the conventional one, and the main function added to the conventional one is to insert the waterproofing material without tools and to fix it securely in the specified position to block the ventilation hole. The secondary function is to increase the strength of the foundation cutter itself to withstand water pressure and water flow, and to increase the degree of fixation to the building.

The functional part for inserting and fixing the waterproofing material is integrated with the base drain main body and may be made of the same material, or the base drain main body and the fixing functional part may be integrated by combining different materials.

Next, the invention of claim 2 will be described. This invention provides a building flood prevention device that prevents flooding by attaching a fixing member for fixing a waterproofing member to a conventional foundation drip-line that does not have a function for fixing a waterproofing member for blocking a ventilation hole in advance, inserting the waterproofing member between the fixing member and the foundation drip-line and pushing it into a predetermined position to fix it so as to block the ventilation hole.

The waterproof member in claim 2 is a molded product having water resistance and durability and made of metal, resin, rubber, etc., just like claim 1. It may be made of a single material, or may be made by combining different materials into one unit.
As described above, in order to improve watertightness, a sponge, packing, water-absorbent material, or water-swellable material may be attached to the parts that come into contact with the base drain and fixing members.

Next, the fixing member which is a feature of claim 2 will be described.
The fixing member is attached to a conventional base drip-line that does not have a function for fixing a waterproofing member. By attaching this member, the waterproofing member can be inserted and maintained in a fixed state in close contact with the ventilation hole.

The material should be water-resistant and durable metal, resin, etc., and may be the same or a different type as the base drain.

The length should be about the same as that of the base drain, as this will make it easier to transport and install.
Furthermore, if the waterproofing material is made of a hard material such as metal, it can be attached closely to the base drain ventilation hole by partially fixing it at key points, so the fixing material does not have to be attached to the entire base drain, and it is possible to attach a fixing material of a few centimeters or more in length to key points.
However, if the waterproofing material is soft, such as resin, it is necessary to attach it to almost the entire base drain and fix the waterproofing material almost entirely to ensure close contact with the base drain ventilation hole.
That is, the length of the fixing member is determined depending on the hardness of the waterproofing member and whether the waterproofing member needs to be fixed entirely or whether partial fixing is sufficient.

The attachment to the base flashing may be by conventional fastening methods such as screwing, soldering, welding, adhesives, etc.
When installing, it is advisable to use adhesives, sealants, etc. to improve the degree of fixation.

This invention can be used in two ways: as a "retrofit" method, in which the fixing components are attached to a foundation gutter installed on an existing building by screwing or the like, or in the case of a new building, in which the fixing components are attached to the existing foundation gutter by screwing or the like, and then attached to the building as a single unit.
In particular, we believe that such devices, which can be retrofitted to existing buildings, have not yet become widespread, at least so far.

In implementing claims 1 and 2, it is important to ensure the strength of the foundation drain itself and the strength of the method of fixing it to the building.
Specifically, if the base flashing is made of steel plate, the strength of the base flashing itself can be ensured by making the steel plate thicker or by reinforcing key parts with plate components made of metal such as aluminum or resin.When attaching it to a building, it is important to ensure the strength of the fixing by screwing it to the foundation or base at key points so that gaps do not occur with the foundation due to water pressure.

Next, the present invention provides a building to which the building flood prevention device according to any one of claims 1 and 2 is applied.

Since foundation drains are generally located at a low position, about 40 to 50 centimeters above the ground, there is a high possibility that they will be directly hit by floodwaters or drifting debris. Therefore, it is important that the foundation drain is not damaged by floodwaters, etc., in order to ensure the effectiveness of preventing flooding through the foundation drain ventilation holes.
In order to prevent floodwaters and drifting debris from hitting the area around the foundation drainage, it is a good idea to surround the entire building site with a block wall or similar structure as much as possible, and to use gates that are difficult for water to pass through.

In conventional base trimmers that do not have the function of fixing waterproofing materials, some are fixed with a gap between the base and the base when the lower part is fixed. In this case, it is necessary to connect and fix the base trimmer and the base part with an L-shaped metal member or the like by screwing them together to close the gap and to strengthen the fixation of the base trimmer.

It is advisable to store the waterproofing materials in an outdoor storage locker, etc. Furthermore, if a notice indicating that the waterproofing materials are being stored is posted on the outside of the storage facility, even if the elderly household or other household members are not at home when flooding is predicted, neighbors can secure the waterproofing materials in place.

Furthermore, even if this device prevents water from seeping in through foundation drainage ventilation holes, unless water seeps in and backflows from gaps in entranceways and windows, exterior wall joints, drainage pipes, etc., it will not be possible to prevent water from seeping in and into the building, so general flood prevention measures are necessary.
In addition, even if flooding is prevented by this device, if the flood water level exceeds about 1 meter above the floor, the building may float up even with still water. Although there is a limit to how much can be done to prevent floating up, measures such as strengthening the connection between the foundation and the building are necessary.

The invention of claim 4 is relatively inexpensive, and after introduction and installation, the maintenance costs are relatively low. Therefore, if a public subsidy system is applied to the application (introduction and installation) of this device in existing buildings and when building new buildings, etc., it will be possible to promote installation throughout the entire region.
If they are installed on a community basis in this way, the methods of fastening the waterproofing materials will be standardized, and therefore, with the support of local residents and local governments, the waterproofing materials will be able to be fastened even in elderly households or households where no one is home.This is expected to serve as one disaster prevention method for the entire community, enabling preparations for heavy rain, typhoons, etc., and to lead to evacuation at home and disaster mitigation effects.
Furthermore, when this device is applied (introduced and installed), fire (flood) insurance premiums will be reduced, which will encourage further installation, leading to the realization of disaster prevention and mitigation throughout society.

As described above, the present invention aims to strike a balance between "ensuring ventilation in peacetime" and "preventing flooding," which is the core of the problem of preventing water from entering buildings through foundation drain ventilation holes, which allow a large amount of water to enter buildings.The invention has been completed based on the following discoveries: when flooding is predicted, waterproofing materials can be inserted and fixed in at least several places depending on the shape of the building and the material of the waterproofing materials, etc.; fixing is possible without extensive use of adhesive tape; the appearance of the building is not marred even when fixed, there is no disruption to daily life, the waterproofing materials are easy to attach and remove; further, adding a fixing function for the waterproofing materials to the foundation drain does not significantly increase manufacturing costs; the manufacturing costs of the waterproofing materials and fixing materials can be kept relatively low due to the material, shape, etc., and they are easy to maintain after installation.

According to the invention described in claim 1, by inserting a waterproofing material into the foundation drain to block the ventilation hole, it is possible to prevent water from entering the building through the ventilation hole.
The invention of claim 2 can prevent water from entering the building through the foundation drain ventilation holes by previously attaching a fixing member for fixing a waterproofing member to a conventional foundation drain, including retrofitting it.
The invention as recited in claim 3 allows the effectiveness of the flood prevention device to be maximized by protecting the building flood prevention device from floodwaters, etc., and storing the waterproofing material outdoors.
The invention as described in claim 4 will promote the spread of installation of the devices by making the installation eligible for subsidies and insurance premium reductions, and will enable local communities, governments, etc. to cooperate in promoting flood prevention and disaster mitigation measures throughout the community and society as a whole, including elderly households, etc.

FIG. 2 is a schematic cross-sectional view of the first embodiment of claim 1. FIG. 2 is a schematic diagram showing the inclination of the base drain of the first embodiment of claim 1. FIG. 2 is a schematic view showing an inclination of a waterproof member according to a first embodiment of the present invention; FIG. 3 is a schematic cross-sectional view of claim 2. 13 is a schematic diagram of an inclination of a fixing member according to claim 2, and a reference diagram of embodiment 2 of claim 1. FIG. 1 is a schematic view showing an inclination of a waterproof member according to a second embodiment of the present invention; FIG. FIG. 2 is a schematic diagram showing the inclination of the base drain of the first embodiment of claim 1. FIG. 2 is a schematic view showing an inclination of a waterproof member according to a first embodiment of the present invention;

Hereinafter, an embodiment of the present invention will be described. However, the embodiments described below and the technical scope of the present invention are not limited to the following embodiments and drawings.
First, a first embodiment of the present invention will be described.

The exterior of a building consists of the foundation, base, columns, exterior walls, etc. The upper part of the base flashing is nailed (screwed) to the furring strip or base. On the other hand, the lower part is generally attached to the foundation but not screwed. The tip of the lower part is generally supported by the foundation or decorative mortar.

Figures 1, 2, 3, 7, and 8 are schematic diagrams of Example 1. Figures 1, 2, and 3 are schematic diagrams, and therefore the inclination angle is exaggerated to make it easier to understand the trapezoidal shape of the base drain 1 into which the waterproofing member 2 is inserted, and the trapezoidal shape of the waterproofing member 2. However, in practice, the trapezoidal portion of the base drain 1 into which the waterproofing member 2 is inserted and the shape of the waterproofing member 2 only need to have the bottom side of the trapezoid slightly narrower than the top side so that the waterproofing member 2 does not fall off, and the inclination angle (trapezoidality) may be small.
In addition, both horizontal sides may be inclined as shown in Figs. 1, 2 and 3, or one may be inclined and the other nearly vertical (almost at a right angle to the bottom wall) as shown in Figs.
If it is made of a steel plate, it may be manufactured by plastic processing or the like.

In Fig. 1, the waterproofing member 2 is projecting outward (below) from the bottom wall of the base drain 1, but in practice it may be flush with the bottom wall or may be located inside the bottom wall. However, for ease of use during fastening work, it is preferable to provide a protrusion on the waterproofing member 2 outward (below) from the bottom wall of the base drain 1 so that it can be easily moved when fastening or removing it.

The second embodiment will be described with reference to FIGS.
The bottom wall portion for fixing the waterproofing member of the base drain 1 may have a shape similar to that of 4b, 4e of the fixing member 4 of claim 2 shown in Fig. 5. This bottom wall portion is provided below the ventilation hole portion. In this case, the waterproofing member is the waterproofing member 5 having a substantially rectangular cross section as shown in Fig. 6. As described above, the shape of the portion for inserting and fixing the waterproofing member differs between Examples 1 and 2. Note that the illustration of this portion is merely a reference example. The shape of this waterproofing member fixing function portion is not limited to the shapes shown in Examples 1 and 2, so long as it is a shape that allows the waterproofing member to be inserted, moved to a predetermined position and fixed, and ensures the watertightness of the ventilation hole.

In both Examples 1 and 2, it is necessary to provide a portion for inserting the waterproofing members 2, 5 in the base drip-line 1. To explain with reference to Figures 1 and 2 for Example 1, the bottom side of the trapezoidal portion of the base drip-line 1 is processed to the same width as the top side so that the waterproofing member 2 can be inserted.
However, if the corners of the base drip tray are made partially detachable, the waterproofing material can be inserted from the corners, so there is no need to provide the above-mentioned insertion points. Furthermore, although not shown, in this case, the waterproofing material can be inserted inside the base drip tray above the ventilation hole to close the ventilation hole from above (inside) and fix it (Example 3).

To explain the case of Example 2, the cutout portion 4e of the bottom wall portion (the wall portion located below the ventilation hole portion) of the base drain 1, which corresponds to the shape of the fixing member 4, is expanded and cut out up to the intersection portion with 4a and 4c, and is processed so that the waterproofing member 5 can be inserted from the same location.

In both Examples 1 and 2, the length for processing the waterproofing member insertion portion depends on the material and thickness of the waterproofing members 2 and 5. That is, if the waterproofing members are flexible or thin enough to be bent vertically when inserted, the waterproofing members 2 and 5 can be inserted and pushed to a predetermined position even if the length to be processed is short. Conversely, if the waterproofing members 2 and 5 are poor in flexibility or thick enough to be difficult to bend vertically, the above processing must be performed for the length that allows the waterproofing members to be inserted and pushed to a predetermined position.

Next, the second aspect of the present invention will be described with reference to FIGS.
FIG. 4 is a schematic cross-sectional view of an embodiment of claim 2. In FIG.
Conventional base drip racks 3 do not have the function of fixing a waterproofing member for blocking the ventilation holes provided in the bottom wall.
Therefore, as shown in FIG. 4, a fixing member 4 for fixing the waterproofing member is attached to a conventional base drip edge 3 and is attached at portions 4b and 4d by screws or the like.
FIG. 4 is a schematic diagram and does not show the base dripboard 3 and the fixing member 4 in a conventional state of being in close contact with each other, but in practice they are in close contact to improve watertightness.
Although the fixing method is shown as screw fastening in the drawing, it may be any conventional fixing method such as soldering, adhesive, etc. Also, it is preferable to increase the degree of fixation by using an adhesive, a sealant, etc.

Next, regarding the waterproof member 5 (FIG. 6), the material is made of metal, resin, rubber, etc., and as described above, it may be made of a single material or may be made of a combination of different materials.

As described above, in Fig. 4, the contact portion (ventilation hole portion) between the waterproofing member 5 and the base drip 3 is illustrated as a gap, but in practice, a waterproofing member 5 molded to fit tightly without gaps to close the ventilation hole is used. Also, in order to increase the watertightness around the ventilation hole, a sponge, packing, water-absorbent material, or water-expandable material may be attached.

FIG. 5 illustrates the fixing member 4 .
Reference numeral 4a denotes a portion that comes into close contact with the exterior of the vertical wall of the conventional base underside 3. This portion is where the base underside 3 is fixed.
Reference numeral 4b denotes a portion that supports the waterproof member 5 to prevent it from falling.
4c is the height required to secure the thickness of the waterproofing member 5. If the vertical wall of the base drip-water sill 3 extends downward from the bottom wall, the length of this extension must be secured. However, if the length is not required, a shape that has been molded (deformed) into which the waterproofing member 5 can be inserted may be used.
4d is a part that is fixed to the bottom wall part other than the ventilation hole part of the base drip tray 3.
4e is located directly below the ventilation hole of the base drain 3, and is a hollowed-out portion to ensure ventilation when the waterproofing member 5 is not fixed. The length of hollowing out 4e depends on the material and strength of the fixing member 4 and the waterproofing member 5. That is, if the strength due to the material of the fixing member 4 is high and the degree of deformation of the waterproofing member 5 is small, the hollowed-out length can be made long, but conversely, if the strength is insufficient and the degree of deformation is large, the bottom wall portion corresponding to 4b is secured as a bridge at key points of the hollowed-out portion 4e, and the continuous length of the hollowed-out portion is shortened, thereby improving the strength of the fixing member 4 and the adhesion of the waterproofing member 5 to the ventilation hole.

The approximate sizes of each of the above parts are as follows: the height of the vertical part of 4a is lower than the vertical wall of the conventional base skimmer 3 (however, it may be made higher and inclined to the same angle as the base skimmer so as to form a cover and fix it to the base skimmer; conversely, it may be made shorter and fixed to the inside of the part of the vertical wall of the base skimmer that extends downward); the length of the horizontal part of 4b is sufficient to cover the ventilation hole, the height of 4c is approximately 5 millimeters or less, and the horizontal part of 4d is no longer than the length that will fit in when installed, taking into account the length to the decorative mortar of the foundation.
Note that the above heights and lengths are merely reference values, and each height, length, installation position, installation method, etc. should be set according to the conventional foundation gutters 3 to be installed and the construction condition of the building, etc.

Furthermore, as mentioned above, if the waterproofing member 5 is made of metal or the like and has a small degree of deformation in the vertical direction, and a degree of adhesion to the conventional base drain 3 can be ensured, the fixing member 4 may be a member several centimeters in length or longer, and may be partially attached to key points of the base drain 3 in accordance with the length and degree of deformation of the waterproofing member 5.

As a feature common to claims 1 and 2, the waterproofing members 2, 5 can be rolled up if they are molded from elastic resin, rubber, etc. If they can be rolled up and stored, when fixing, the ends can be inserted into the base drain 1 or the fixing member 4 at a loading location where a wood deck or the like is not installed, and then pushed into the specified position, whereby the straight portions of the base drain 1 and the fixing member 4 can be fixed in a continuous, single piece. If the waterproofing members 2, 5 are flexible and can be rolled up in this way, it is possible to improve the efficiency of transportation, storage, and fixing work, and it is possible to improve watertightness by fixing them in a long, single piece.

In the case of a conventional steel base skirting 3, if the strength is insufficient and the ventilation holes are blocked, the bottom wall part may be pushed upward by the water pressure when flooded, and a gap may occur between the lower tip and the foundation. To prevent such a gap from occurring, it is recommended to connect and fix the base skirting 3 to the foundation with an L-shaped metal plate or the like by screwing it.
In addition, in the case of the foundation drain 1, a part that fits along the foundation can be provided at the bottom, or a part that comes into contact with the foundation can be provided, and the fixing can be strengthened by fixing the part to the foundation or the foundation with screws or the like.
However, if the base flashing has sufficient water pressure resistance and no gap occurs between it and the foundation, the lower tip may be supported by the foundation or decorative mortar as in the past.

Furthermore, since the waterproofing material does not interfere with daily life even if it is left fixed and does not mar the scenery, it can also be fixed to the foundation drain for a limited period of time for the purpose of heat storage heating under the floor, etc.
It can also be used as a measure against high tides and salt damage caused by sea breezes.

The building flood prevention device of the present invention is not limited to the above-described embodiment, and various modifications can be made to the material, shape, length, fixing method, etc. of each component within the scope of the claims.
The basis of the present invention is to insert waterproofing members 2, 5, which are formed into a shape that can reliably block the ventilation holes of the base drain 1, into the fixing function part of the base drain 1, and push them into a predetermined position to fix them, thereby preventing water from seeping in through the ventilation holes. Also, for conventional base drains that do not have a function for fixing waterproofing members, a fixing member is attached in advance to insert and fix the waterproofing members, thereby preventing water from seeping in through the ventilation holes.
In the claims, the present invention refers to flood hazard maps, etc., and takes into consideration the location conditions of the building, the surrounding environment, the condition of the building itself, the installation condition of the foundation drain, etc., and appropriately combines the foundation drain, waterproofing materials, etc. of the present invention with conventional fixing methods, etc., and applies installation and dissemination measures to establish buildings that are resistant to flooding through the foundation drain ventilation holes, and disaster prevention and mitigation measures.

1. Base drainage 2. Waterproofing material (cross section is trapezoidal)
3 Conventional base underside 4 Fixing member 4a Vertical wall of fixing member (part fixed to conventional base underside 3)
4b Bottom wall portion of fixing member (portion supporting waterproof member 5)
4c Vertical wall of fixing member (portion that ensures the height to accommodate waterproof member 5)
4d Bottom wall of fixing member (part fixed to conventional base drain 3)
4e Hole in fixing member (portion directly below the ventilation hole to ensure ventilation)
5. Waterproof material (cross section is roughly rectangular)

Claims (4)

A base drainer having a bottom wall portion formed with a recess extending along the base and recessed upward, a plurality of ventilation holes arranged along the base on an upper surface of the recess, and a cross-sectional shape of the recess being a trapezoid whose lower side is narrower than its upper side;
A waterproofing member extends along the base, has a trapezoidal cross-sectional shape with a lower side narrower than an upper side, and is inserted into the recess of the bottom wall of the base drip rack;
A building flood prevention device comprising : A fixing member to be attached to a base drain having a ventilation hole in a bottom wall portion , the fixing member having a recess extending along the base and recessed downward in a portion that contacts the lower surface of the bottom wall portion, and a cutout portion formed on the lower surface of the recess ;
A waterproof member to be inserted into the recess;
A building flood prevention device comprising : The portion of the fixing member that contacts the lower surface of the bottom wall portion is attached to the bottom wall portion of the base drip rack.
The building flood prevention device according to claim 2. A building equipped with a building flood prevention device according to any one of claims 1 to 3 .

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