Underfloor ventilation opening water stopper, retaining seat for underfloor ventilation opening water stopper cover, and underfloor ventilation opening structure with water stopper function

Abstract

To provide an underfloor ventilation opening water cut-off tool, a holding seat of a lid for the underfloor ventilation opening water cut-off, and an underfloor ventilation opening structure with a water cut-off function, achieving both of the easiness of mounting the underfloor ventilation opening water cut-off tool on an underfloor ventilation opening, the easiness of mounting the lid of the water cut-off tool, and the robustness of the water cut-off function of the underfloor ventilation opening.SOLUTION: A underfloor ventilation opening water cutoff tool 100 is provided with a fixed frame part 1 fixable to the underfloor ventilation opening 8 formed in a building 9, and a lid part 5 having a plate-like lid face part 50 held by the fixed frame part 1. The fixed frame part 1 has an annular and plate-like annular plate part 10 having an opening 11 along the shape of the ventilation opening 8, and a cylindrical frame part 3 extending from the outer periphery of the annular plate part 10 in a direction intersecting the plate surface of the annular plate part 10. The lid part 5 is fitted inside the cylinder of the cylindrical frame part 3 and held in the fixed frame part 1 while touching the annular plate part 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a floor ventilation port water stop device, a holding seat for a lid for water stopping of a floor ventilation port, and a floor ventilation port structure with a water stopping function.

Background Art

[0002] In Japan in recent years, meteorological phenomena in which a large amount of rain falls in a short time (hereinafter simply referred to as concentrated heavy rain), such as so-called guerrilla heavy rain or concentrated heavy rain, have occurred frequently. When concentrated heavy rain occurs, the ground may become waterlogged and water may flood into the floor from the floor ventilation ports of buildings. Therefore, there is a need to close the floor ventilation ports of buildings when necessary to prevent flooding into the floor, and floor ventilation port water stop devices, holding seats for lids for water stopping of floor ventilation ports, or floor ventilation port structures with a water stopping function have been provided.

[0003] Patent Document 1 describes a device for preventing flooding of floor ventilation holes, floor insulation in winter, and preventing unauthorized entry from outside. This device consists of a ferromagnetic frame attached around the outer opening of the floor ventilation hole via a waterproof adhesive or the like, and a water stop plate in contact with a magnet sheet and a waterproof rubber sealing material for shielding the opening. In this device, the water stop plate and the frame are brought into close contact by the adsorption force due to the magnetic force of the magnet sheet to prevent water from entering the floor. Also, if the central part of the water stop plate is made into a mesh, it is said to have an insect-proof function for preventing the entry of pests.

[0004] Patent Document 2 also describes a device for preventing flooding of floor ventilation holes, floor insulation in winter, and preventing unauthorized entry from outside. This device consists of a ferromagnetic frame attached around the outer opening of the floor ventilation hole via a waterproof adhesive or the like, and a water stop plate to which a magnet sheet, a magnet, and a waterproof packing are adhered for shielding the opening. In this device, the water stop plate and the frame are brought into close contact by the adsorption force due to the magnetic force of the magnet sheet and the magnet to prevent water from entering the floor. A positioning guide is provided on the frame or the water stop plate. Also, in this device, a storage plate for storing the water stop plate when not in use is provided. Also, if the central part of the water stop plate is made into a mesh, it is said to have an insect-proof function for preventing the entry of pests.

[0005] Patent Document 3 describes an underfloor ventilation opening. In this underfloor ventilation opening, a wire mesh is stretched over a rectangular frame, and the frame of the ventilation opening, which is attached to an opening formed in the foundation, is made of a ferromagnetic material. A sheet made of rubber or resin mixed with magnetic powder is attached to the frame by magnetic force, so as to cover the entire surface of the ventilation opening. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Utility Model Registration No. 3136708 Gazette [Patent Document 2] Japanese Patent Publication No. 2010-43509 [Patent Document 3] Japanese Patent Publication No. 2020-122343 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] In the conventional underfloor ventilation opening water seals, retaining seats for covers for underfloor ventilation opening water seals, and underfloor ventilation opening structures with water-sealing functions described above, there was room for improvement in balancing the ease of installation of the water seal and its cover with the robustness of the underfloor ventilation opening's water-sealing function. For example, the cover of the underfloor ventilation opening water seal may easily come off due to water flow from the side, or the watertightness between the underfloor ventilation opening water seal and the underfloor ventilation opening may not be sufficient, resulting in an inability to obtain a robust water-sealing function. Therefore, there is a need to provide underfloor ventilation opening water seals, retaining seats for covers for underfloor ventilation opening water seals, and underfloor ventilation opening structures with water-sealing functions that balance the ease of installation of the water seal and its cover with the robustness of the underfloor ventilation opening's water-sealing function.

[0008] The present invention has been made in view of the above circumstances, and its purpose is to provide an underfloor ventilation opening water stopper, a retaining seat for a cover for underfloor ventilation opening water stopper, and an underfloor ventilation opening structure with water stopper function that achieve both ease of attachment of the underfloor ventilation opening water stopper to the underfloor ventilation opening and ease of attachment of the cover of the water stopper, and robustness of the water stopper function of the underfloor ventilation opening. [Means for solving the problem]

[0009] To achieve the above objective, the underfloor ventilation opening water-stopping device according to the present invention is: A fixing frame that can be fixed to the ventilation opening under the floor of the building, The lid portion, which has a plate-shaped lid surface portion, is held in the fixed frame portion, The aforementioned fixed frame portion is An annular, plate-shaped annular plate portion that conforms to the shape of the ventilation opening and has an opening, It has a cylindrical frame portion extending from the outer periphery of the annular plate portion in a direction intersecting the plate surface of the annular plate portion, The lid portion is fitted inside the cylinder of the cylindrical frame portion and is held in place by the fixed frame portion by making surface contact with the annular plate portion.

[0010] To achieve the above objective, the retaining seat for the cover of the underfloor ventilation opening that is used according to the present invention is: It can be fixed to a ventilation opening under the floor of a building, and the annular, plate-shaped annular plate portion conforms to the shape of the ventilation opening and has an opening, The annular plate portion has a cylindrical frame portion that extends from the outer periphery of the annular plate portion in a direction intersecting the plate surface of the annular plate portion.

[0011] The underfloor ventilation structure according to the present invention, for achieving the above objective, The ventilation openings under the building's floor, A fixing frame portion fixed to the aforementioned ventilation opening, The system comprises a lid portion having a plate-shaped lid surface portion, which is held in the fixed frame portion, The aforementioned fixed frame portion is An annular, plate-shaped annular plate portion that conforms to the shape of the ventilation opening and has an opening, The annular plate portion has a cylindrical frame portion extending from its outer periphery in the direction opposite to the building, The annular plate portion is positioned such that its opening overlaps with the ventilation opening and is in contact with the outer surface of the building. The lid portion is fitted inside the cylinder of the cylindrical frame portion and is held in place by the fixed frame portion by making surface contact with the annular plate portion. [Effects of the Invention]

[0012] It is possible to provide an underfloor ventilation port water stop device that balances the ease of attachment of the underfloor ventilation port water stop device to the underfloor ventilation port, the ease of attachment of the lid of the water stop device, and the robustness of the water stop function of the underfloor ventilation port, a holding seat for the lid for underfloor ventilation port water stop, and an underfloor ventilation port structure with a water stop function.

Brief Description of the Drawings

[0013] [Figure 1] It is an exploded perspective view of the underfloor ventilation port structure. [Figure 2] It is a perspective view of the state where the fixed frame part is fixed to the ventilation port. [Figure 3] It is a perspective view of the underfloor ventilation port structure. [Figure 4] It is a sectional view taken along the arrow IV-IV of FIG. 3. [Figure 5] It is a sectional view taken along the arrow V-V of FIG. 3. [Figure 6] It is a front view of the underfloor ventilation port water stop device. [Figure 7] It is a rear view of the underfloor ventilation port water stop device. [Figure 8] It is a side view (right side view) of the underfloor ventilation port water stop device. [Figure 9] It is a top view of the underfloor ventilation port water stop device. [Figure 10] It is a bottom view of the underfloor ventilation port structure.

Modes for Carrying Out the Invention

[0014] The underfloor ventilation opening water-sealing device, the retaining seat for the cover used to seal underfloor ventilation openings, and the underfloor ventilation opening structure with water-sealing function described below are used in the structure of buildings such as multi-story houses with a steel frame. The building in which the underfloor ventilation opening water-sealing device and the underfloor ventilation opening structure with water-sealing function described below are used may consist of a reinforced concrete foundation, a frame structure composed of framing members such as columns and beams, and a superstructure fixed to the foundation, with panels forming walls and floors. The framing members and panels can be standardized in advance. In this case, the framing members can be manufactured in advance at a factory and transported to the construction site for assembly. The building in which the underfloor ventilation opening water-sealing device and the underfloor ventilation opening structure with water-sealing function described below are used may be incorporated as part of a new building construction or may be added to an existing building.

[0015] Hereinafter, an embodiment of the underfloor ventilation opening water stopper, a retaining seat for a cover for underfloor ventilation opening water stopper, and an underfloor ventilation opening structure with a water stopper function will be described based on the drawings.

[0016] Figure 1 shows an exploded perspective view of an underfloor ventilation structure 200 equipped with an underfloor ventilation opening water stopper 100 according to this embodiment.

[0017] The underfloor ventilation structure 200 consists of an underfloor ventilation opening 8 formed in the foundation 90 of the building 9, with an underfloor ventilation opening water stopper 100 attached to it. In this embodiment, the ventilation opening 8 is shown as a rectangular through-hole penetrating the wall portion of the foundation 90. In the following description, the underfloor ventilation structure 200 will be explained using the example of an underfloor ventilation opening water stopper 100 being attached to a rectangular through-hole ventilation opening 8, but the ventilation opening 8 is not limited to being rectangular; for example, it may be circular.

[0018] The underfloor ventilation opening water stopper 100 comprises a fixing frame portion 1 that can be fixed to the ventilation opening 8, and a lid portion 5 having a plate-shaped lid surface portion 50 that is held by the fixing frame portion 1. The fixing frame portion 1 has an annular, plate-shaped annular plate portion 10 that conforms to the shape of the ventilation opening 8 and has an opening 11, and a cylindrical frame portion 3 that extends from the outer circumference of the annular plate portion 10 in a direction intersecting the plate surface of the annular plate portion 10. The lid portion 5 is fitted inside the cylinder of the cylindrical frame portion 3 and is held by the fixing frame portion 1 by making surface contact with the annular plate portion 10.

[0019] In other words, the underfloor ventilation structure 200 comprises a ventilation opening 8, a fixed frame portion 1 fixed to the ventilation opening 8, and a lid portion 5 held by the fixed frame portion 1. The fixed frame portion 1 has an annular, plate-shaped annular plate portion 10 that conforms to the shape of the ventilation opening 8 and has an opening 11, and a cylindrical frame portion 3 that extends from the outer circumference of the annular plate portion 10 in the direction opposite to the foundation portion 90. The annular plate portion 10 is positioned so that its opening 11 overlaps with the ventilation opening 8 and is in surface contact with the outer surface of the foundation portion 90. The lid portion 5 is fitted inside the cylinder of the cylindrical frame portion 3 and is held by the fixed frame portion 1 in surface contact with the annular plate portion 10.

[0020] In the underfloor ventilation opening water sealing device 100 and underfloor ventilation opening structure 200, the fixing frame portion 1 is a retaining seat for a cover portion 5, which is a cover for sealing the underfloor ventilation opening, and is fixable to the ventilation opening 8. The cover portion 5 has an annular, plate-shaped annular plate portion 10 that conforms to the shape of the ventilation opening 8 and has an opening 11, and a cylindrical frame portion 3 that extends from the outer circumference of the annular plate portion 10 in a direction intersecting the plate surface of the annular plate portion 10.

[0021] The underfloor ventilation opening water stopper 100, the fixing frame 1, and the underfloor ventilation opening structure 200 are designed to facilitate the installation of the underfloor ventilation opening water stopper 100 and its fixing frame 1 into the ventilation opening 8, as well as the installation of the cover 5. Furthermore, the underfloor ventilation opening water stopper 100, the fixing frame 1, and the underfloor ventilation opening structure 200 achieve both ease of installation and robust water-stopping functionality for the ventilation opening 80.

[0022] The following describes the various parts of the underfloor ventilation opening water stopper 100 and the underfloor ventilation opening structure 200.

[0023] As shown in Figure 1, the following explanation will illustrate a case where the ventilation opening 8 is formed in the foundation 90 of the building 9, and the shape of the opening of the ventilation opening 8 is rectangular with the horizontal direction being the longitudinal direction, as viewed from the front of the foundation 90 (front view).

[0024] In the following explanation, the direction in which the rectangular opening of the ventilation opening 8 is the same as the longitudinal direction is referred to as the width direction (indicated by the symbol y in Figure 1). The direction in which the ventilation opening 8 is the same as the short direction, i.e., the same as the vertical direction is referred to as the up-down direction (indicated by the symbol z in Figure 1). The upward or upper side in the vertical direction is referred to as upward, upper side, or down, and the downward or lower side in the vertical direction is referred to as downward, lower side, or down. The direction along the depth direction of the ventilation opening 8 relative to the foundation 90 is referred to as the depth direction (indicated by the symbol x in Figure 1). The outside of the ventilation opening 8 in the depth direction is the side that is spaced apart from the ventilation opening 8 and the foundation 90. The inside of the ventilation opening 8 in the depth direction is the side that is the internal space of the ventilation opening 8. In the following explanation, when we simply refer to the inside or outside of the opening of ventilation opening 8, we are referring to the inside or outside of the opening of ventilation opening 8 in the longitudinal and transverse directions of the opening of ventilation opening 8, that is, in the in-plane direction of the opening of ventilation opening 8.

[0025] The fixed frame portion 1 is fixed to the ventilation opening 8 as an underfloor ventilation opening water stopper 100, and is a frame body that serves as a retaining seat for sealing the ventilation opening 8 by holding the cover portion 5, which serves as a cover for sealing the underfloor ventilation opening. The fixed frame portion 1 has an annular plate portion 10, a fixed plate portion 2, and a cylindrical frame portion 3. The fixed frame portion 1 can be made of metal such as iron or a metal alloy, resin, or wood. The portion of the fixed frame portion 1 that is attracted by the magnetic force of the plate-shaped magnet 6, which will be described later, must be made of a magnetic material.

[0026] The annular plate portion 10 is an annular, plate-shaped (i.e., flange-shaped) member positioned along the outer surface of the base portion 90, allowing the ventilation opening 8 to be opened. The plate surface of the annular plate portion 10 is parallel to its ring and also parallel to the outer surface of the base portion 90. This allows the annular plate portion 10 to make surface contact with the outer surface of the base portion 90 (see Figures 4 and 5), suppressing rattling in the depth direction and enabling the fixing frame portion 1 to be attached to the ventilation opening 8.

[0027] The shape of the inner circumference of the ring of the annular plate portion 10 is such that it conforms to the shape of the opening of the ventilation opening 8. That is, the annular plate portion 10 has a rectangular opening 11 that penetrates the plate surface. When the fixed frame portion 1 is attached to the ventilation opening 8, the annular plate portion 10 should overlap with the opening 11 and the ventilation opening 8 from a viewpoint along the depth direction (depth view, same as front view). In this way, the annular plate portion 10 ensures that the ventilation opening 8 is open when the fixed frame portion 1 is attached to the ventilation opening 8. Note that the shape of the inner circumference of the ring of the annular plate portion 10 (shape of the opening 11) may be the same as the shape of the opening of the ventilation opening 8, or the end of the inner circumference of the ring of the annular plate portion 10 may be located slightly inside or outside the opening of the ventilation opening 8. In this embodiment, the case in which the inner circumference end of the upper end of the annular plate portion 10 overlaps with the ventilation opening 8 from a depth view is illustrated.

[0028] The shape of the outer circumference of the ring of the annular plate portion 10 is such that the entire outer circumference of the side of the annular plate portion 10 facing the base portion 90 can come into contact with the outer surface of the base portion 90 outside the opening of the ventilation opening 8.

[0029] The cylindrical frame portion 3 is a cylindrical member that extends from the outer periphery (end of the outer periphery) of the annular plate portion 10 to the outside of the ventilation opening 8 in the depth direction (the side away from the ventilation opening 8) in a direction that intersects (orthogonal in this embodiment) with the surface of the annular plate portion 10 (the same as the out-of-plane direction of the annular plate portion 10, and also the same as the depth direction). In other words, the cylindrical frame portion 3 is shaped such that the direction in which its cylinder extends is perpendicular to the surface of the annular plate portion 10. That is, the cross-sectional shape of the cylindrical frame portion 3 intersecting the direction in which its cylinder extends is rectangular. The cylindrical frame portion 3 extends in the opposite direction to the fixing plate portion 2, which will be described later.

[0030] The cylindrical frame portion 3 may have an outer plate portion 4 that runs along the annular plate portion 10 (in this embodiment, parallel to the annular plate portion 10). The outer plate portion 4 is a plate-shaped member that extends radially inward from the end of the cylindrical frame portion 3 (hereinafter referred to as the tip portion) on the side opposite to the annular plate portion 10 in the direction of extension of the cylindrical frame portion 3 (same as the depth direction). The outer plate portion 4 may be formed, for example, to extend downward from the upper side of the tip portion of the cylindrical frame portion 3. In the underfloor ventilation opening water stopper 100, as will be described later, the lid portion 5 is housed in the space enclosed by the annular plate portion 10, the cylindrical frame portion 3, and the outer plate portion 4, and the lid portion 5 is stably held by the fixed frame portion 1.

[0031] The fixing plate portion 2 is a plate-shaped member that extends in a direction intersecting (orthogonal in this embodiment) with the plate surface of the annular plate portion 10, and toward the inside of the ventilation opening 8 in the depth direction. In other words, the fixing plate portion 2 extends in the opposite direction to the cylindrical frame portion 3.

[0032] The fixing plate portion 2 has a shape that conforms to the ring shape of the annular plate portion 10, and when the fixing frame portion 1 is fixed to the ventilation opening 8, it extends along the inner surface of the ventilation opening 8 and is positioned and shaped to make surface contact with the inner surface of the ventilation opening 8 (see Figure 4). By positioning the fixing plate portion 2 along the inner surface of the ventilation opening 8 and making surface contact with the inner surface of the ventilation opening 8, the fixing frame portion 1 can be attached to the ventilation opening 8 while suppressing rattling in the width direction or vertical direction when the fixing frame portion 1 is attached to the ventilation opening 8. The fixing plate portion 2 is preferably positioned to extend from the inner circumference end of the ring of the annular plate portion 10.

[0033] In this embodiment, the fixed plate portion 2 is exemplified as rectangular fixed plates 21 and 22 that extend into the inside of the ventilation opening 8 from both inner ends of the annular plate portion 10 in the width direction. The fixed plates 21 and 22 are plate-shaped as the fixed plate portion 2 and are arranged so as to make surface contact with both sides in the width direction on the inner surface of the ventilation opening 8 (see Figure 4).

[0034] The fixing plates 21 and 22 each have through-holes 21a and 22a that penetrate their surfaces. In the underfloor ventilation opening water stopper 100, screws 21b and 22b are inserted through these through-holes 21a and 22a, and the fixing plates 21 and 22 are fixed to the walls on both sides in the width direction on the inner surface of the ventilation opening 8 with these screws 21b and 22b, thereby fixing the fixing frame 1 to the ventilation opening 8. In other words, in the underfloor ventilation opening structure 200, the underfloor ventilation opening water stopper 100 is fastened with screws using the through-holes 21a and 22a provided in the fixing plates 21 and 22 of the fixing plate 2, with the opening 11 of the annular plate portion 10 of the fixing frame 1 overlapping with the opening of the ventilation opening 8 when viewed in the depth direction (see Figure 2).

[0035] The fixed frame portion 1 can be formed, for example, by punching and bending a rectangular metal plate. For example, a rectangular metal plate can be punched to form an opening, leaving the plate portions that will become the fixed plates 21 and 22 on the inside of the opening. These plate portions can then be bent out of the plane of the metal plate to form the fixed plates 21 and 22 and the opening 11. Additionally, the four corners of the outer periphery of the metal plate can be cut into rectangular shapes, and the remaining four sides can be bent in the opposite direction to the fixed plates 21 and 22 out of the plane of the metal plate to form the cylindrical frame portion 3. The outer plate portion 4 can be formed by further bending the edge portions of the metal plate that will become the cylindrical frame portion 3.

[0036] The lid portion 5 is a member having a plate-shaped lid surface portion 50. The lid portion 5 seals the opening 11 of the annular plate portion 10 with its lid surface portion 50, thereby sealing the ventilation opening 8 to which the underfloor ventilation opening water stopper 100 is attached (see Figure 3). The lid portion 5 is held in place by magnetic force on the annular plate portion 10, as will be described later.

[0037] The lid portion 5 includes a lid surface portion 50, a plate-shaped lid edge portion 51 extending from the end of the lid surface portion 50 in a direction intersecting the lid surface portion 50 (in this embodiment, a perpendicular direction, the same as the depth direction), a plate-shaped handle portion 52 extending from the edge of the lid edge portion 51 opposite to the lid surface portion 50 in the in-plane direction of the lid surface portion 50, and a plate-shaped magnet 6 arranged on the surface of the lid surface portion 50 facing the ventilation opening 8 (the surface facing inward towards the ventilation opening 8 in the depth direction, hereinafter referred to as the inner surface).

[0038] The lid portion 50 may be formed in a rectangular shape that conforms to the shape of the opening 11 of the annular plate portion 10 (for example, a shape that is roughly similar to the shape of the opening 11). The lid portion 50 is a plate shape in which the surface area is larger than the opening 11 and smaller than the outer shape of the annular plate portion 10, and the size is such that when the lid portion 5 is held in place by the fixed frame portion 1, the four sides of the inner surface of the lid portion 50 make surface contact with the annular plate portion 10 (see Figures 4 and 5).

[0039] In this embodiment, the lid edge 51 extends from the lower end (lower end) of the lid surface 50 in a direction intersecting the lid surface 50 and moving away from the ventilation opening 8, that is, outward from the ventilation opening 8 in the depth direction. The lid edge 51 rests on the inner surface of the lower edge portion of the cylindrical frame 3 when the lid 5 is fitted into the space enclosed by the annular plate portion 10 and the cylindrical frame portion 3 and the lid 5 is held by the fixed frame portion 1 (hereinafter referred to as the mounting state of the lid 5), thereby stabilizing the mounting state of the lid 5.

[0040] Furthermore, the handle portion 52 extends upward from the end of the lid edge portion 51 opposite to the lid surface portion 50, that is, from the outer end of the ventilation opening 8 in the depth direction. The handle portion 52 serves as a gripping portion when attaching or removing the lid portion 5.

[0041] The lid portion 5 can be formed, for example, by bending a rectangular metal plate to create the lid surface portion 50, the lid edge portion 51, and the handle portion 52.

[0042] The plate-shaped magnet 6 is, for example, a magnet sheet made by kneading a magnetic material into a rubber sheet molded into a plate shape, or a plate-shaped magnet made of a magnetized magnetic material. The plate-shaped magnet 6 may be arranged to cover the entire inner surface of the lid portion 50, or it may be arranged in a ring shape along the outer circumference of the inner surface of the lid portion 50.

[0043] The plate-shaped magnet 6 may be fixed to the inner surface of the lid portion 50 by bonding it with an adhesive or other material, or the lid portion 50 may be formed from a magnetic material and the plate-shaped magnet 6 may be fixed to the inner surface of the lid portion 50 by magnetic attraction. This allows the plate-shaped magnet 6 to be supported by the lid portion 50 and maintain its shape, even if it is made of a relatively soft or low-strength material such as a magnetic sheet. When the plate-shaped magnet 6 is arranged in a ring along the outer circumference of the inner surface of the lid portion 50, it is preferable to bond or attract the plate-shaped magnet 6 and the lid portion 50 without any gaps.

[0044] The plate-shaped magnet 6 only needs to be positioned such that, when the lid 5 is attached, the area overlapping with the annular plate portion 10 in the depth direction is annular. By forming the annular plate portion 10 from a magnetic material, the plate-shaped magnet 6 is attracted to the annular plate portion 10 by magnetic force when the lid 5 is attached. At this time, since the plate-shaped magnet 6 is positioned such that the area overlapping with the annular plate portion 10 in the depth direction is annular, the entire outer circumference of the lid surface portion 50 is attracted to the annular plate portion 10 via the plate-shaped magnet 6. As a result, the lid 5 is stably held on the annular plate portion 10 when the lid 5 is attached. Furthermore, since the plate-shaped magnet 6 is positioned such that the area overlapping with the annular plate portion 10 in the depth direction is annular, the magnetic attraction causes the plate-shaped magnet 6 to press against the annular plate portion 10 in a surface contact state around its entire circumference, sealing the opening 11 without any gaps with the lid surface portion 50.

[0045] The following describes the installation of the underfloor ventilation opening water stopper 100 into the ventilation opening 8.

[0046] First, as shown in Figure 2, the fixed frame part 1 is attached to the ventilation opening 8. At this time, the fixed plate part 2 is inserted into the ventilation opening 8, and the fixed plates 21 and 22 of the fixed plate part 2 (see Figure 1) are made to make surface contact with the inner surface of the ventilation opening 8 (see Figure 4). Also, the annular plate part 10 of the fixed frame part 1 is made to make surface contact with the outer surface of the base part 90 (see Figure 4). At this time, a sealant (sealing material) may be applied between the annular plate part 10 and the outer surface of the base part 90 to improve the airtightness (watertightness) between the annular plate part 10 and the outer surface of the base part 90.

[0047] With the annular plate portion 10 of the fixed frame portion 1 in contact with the outer surface of the base portion 90 (see Figures 4 and 5), the fixed plates 21 and 22 are fixed to the walls on both sides in the width direction of the ventilation opening 8 by screwing them in, for example, through holes 21a and 22a (see Figure 4). This fixes the fixed frame portion 1 to the ventilation opening 8.

[0048] Thus, attaching the fixed frame 1 to the ventilation opening 8 is extremely easy.

[0049] When the fixed frame section 1 is fixed to the ventilation opening 8, the cylindrical frame section 3 is erected on the outer surface of the foundation section 90. That is, the cylindrical frame section 3 extends perpendicularly (same as the depth direction) to the outer surface of the foundation section 90. This makes it easy to apply the sealing material 95 that fills the gap between the outer surface of the foundation section 90 and the fixed frame section 1 (annular plate section 10) to the outer surface of the cylinder of the cylindrical frame section 3 (so-called triangular seal application). This fills the gap between the foundation section 90 and the fixed frame section 1, improving the airtightness (watertightness) between the foundation section 90 and the fixed frame section 1. In order to apply a proper triangular seal and to ensure the robustness of the water-stopping function described later, it is preferable to ensure that the extension length (height) of the cylindrical frame section 3 from the outer surface of the foundation section 90 is 10 mm or more.

[0050] By the way, Figures 1 to 3 and 5 illustrate the case where the flashing 91 of the exterior wall of the building 9 is located directly above the ventilation opening 8. In this case, as shown in Figure 2, it becomes difficult to apply sealant (apply sealing material) to the upper part of the cylindrical frame 3 between the outer surface of the building 9 (foundation 90, exterior wall and its flashing 91) and the outer surface of the cylindrical frame 3, or between the building 9 and the outer surface of the cylindrical frame 3. However, in the fixed frame 1, since the cylindrical frame 3 has an outer plate 4, it is possible to apply sealing material 96 to the surface of the outer plate 4 opposite to the side facing the ventilation opening 8 (the outer side in the depth direction) (hereinafter referred to as the outer surface of the outer plate 4). Therefore, by applying a sealant 96 from the outer surface of the outer panel 4 to the flashing 91 of the exterior wall, filling the gap between the fixed frame 1 (the outer surface of the cylindrical frame 3) and the building 9 (the foundation 90 or the flashing 91 of the exterior wall) (see Figure 5), the airtightness (watertightness) between the foundation 90 and the fixed frame 1 can be improved. From the viewpoint of proper sealing, it is desirable to ensure that the length of the outer panel 4 extending downward is 10 mm or more.

[0051] As described above, the fixed frame section 1 is designed to facilitate sealing work, and in this respect, attaching the fixed frame section 1 to the ventilation opening 8 is extremely easy. Furthermore, as described above, sealing work on the fixed frame section 1 can be performed with the fixed frame section 1 attached to the ventilation opening 8, and the sealing material is exposed to the outside. Therefore, when the sealing material deteriorates after a predetermined period has elapsed since its application, the sealing material can be removed from the outside while the fixed frame section 1 is still attached to the ventilation opening 8, and the sealing material can be reapplied while the fixed frame section 1 is still attached to the ventilation opening 8, thus providing good maintainability.

[0052] Once the fixed frame 1 is secured to the ventilation opening 8 and properly sealed, the lid 5 is fitted into the space enclosed by the annular plate 10 and the cylindrical frame 3 as needed (for example, when heavy rain is expected), and secured to the annular plate 10 by the magnetic force of the plate magnet 6 (i.e., the lid 5 is in the installed state). In the installed state of the lid 5, the lid surface 50 makes surface contact with the annular plate 10 via the plate magnet 6.

[0053] Since the cylindrical frame portion 3 has an outer plate portion 4, the lid portion 5 is fitted into the space enclosed by the annular plate portion 10 and the cylindrical frame portion 3 in the following manner. That is, first, the upper end of the lid portion 5 is inserted between the outer plate portion 4 and the annular plate portion 10, and then the lower end of the lid portion 5 (lid edge portion 51) is inserted into the space enclosed by the annular plate portion 10 and the cylindrical frame portion 3. This operation can be performed by gripping the handle portion 52, making it easy to operate.

[0054] To remove the lid 5 from the fixed frame 1, grasp the handle 52, pull the lower end (lid edge 51) of the lid 5 out of the space enclosed by the annular plate 10 and the cylindrical frame 3, and then pull out the upper end of the lid 5 from between the outer plate 4 and the annular plate 10. This operation can also be performed by grasping the handle 52, making it easy to operate.

[0055] In this way, the lid 5 is designed to be easy to attach and detach.

[0056] The following describes the mounting state of the lid 5.

[0057] When the lid 5 is attached, the cylindrical frame 3 has an outer plate 4, so the lid 5 is housed in the space enclosed by the annular plate 10, the cylindrical frame 3, and the outer plate 4, and is stably held by the fixed frame 1. For example, even if a force is applied to the lid 5 in a direction away from the ventilation opening 8, the lid 5 is supported by the outer plate 4, and the lid 5 will not come off the fixed frame 1 unintentionally.

[0058] Furthermore, when the lid portion 5 is attached, the lid edge portion 51 rests on the inner surface of the lower edge portion of the cylindrical frame portion 3, so the lid portion 5 will not come off the fixed frame portion 1 unintentionally.

[0059] Furthermore, when the lid 5 is installed, it is surrounded by the cylindrical frame 3. Therefore, even if, for example, the ventilation opening 8 is submerged in water and a strong stream of water along the outer surface of the foundation 90 collides with the underfloor ventilation opening stopper 100 (ventilation opening 8), the force that the water stream can exert on the lid 5 is weakened by the cylindrical frame 3. As a result, even if a strong stream of water along the outer surface of the foundation 90 collides with the underfloor ventilation opening stopper 100 (ventilation opening 8), the lid 5 will not inadvertently detach from the fixing frame 1.

[0060] This action can be explained in more detail as follows: In order for the lid 5 to be smoothly attached to and detached from the fixed frame 1, there must be a certain amount of space between the end of the lid 5 and the inside of the cylindrical frame 3. On the other hand, when the ventilation opening 8 is submerged in water, if a strong stream of water along the outer surface of the foundation 90 collides with the underfloor ventilation opening stopper 100 (ventilation opening 8) from the up, down, left, and right directions, water will flow into the gap, and further water will flow into the space between the annular plate 10 and the lid 5, creating a force that tries to separate the lid 5 from the fixed frame 1, which causes the lid 5 to detach from the fixed frame 1. However, if the extended length of the cylindrical frame 3 is sufficiently secured, the force of the water flow toward the gap between the end of the lid 5 and the inside of the cylindrical frame 3 will be reduced, so the lid 5 will not come off the fixed frame 1 unintentionally.

[0061] The thickness of the lid portion 5 can be, for example, about 3 mm, but the thickness should be such that it can withstand water pressure, taking into consideration the material. In contrast, the extension length (height) of the cylindrical frame portion 3 from the outer surface of the foundation portion 90 must be greater than or equal to the thickness of the lid portion 5, preferably 10 mm or more, and more preferably 15 mm or more. The longer (higher) the extension length (height) of the cylindrical frame portion 3, the weaker the force that tries to separate the lid portion 5 from the fixed frame portion 1 is, even if a strong water flow (about 1 m / s in a typical flood, and up to about 5 m / s at maximum) along the outer surface of the foundation portion 90 collides with the underfloor ventilation opening water stopper 100 (ventilation opening 8), and the less likely the lid portion 5 is to come off the fixed frame portion 1 unintentionally. On the other hand, if the extension length (height) of the cylindrical frame portion 3 from the outer surface of the base portion 90 is too long (high), the water flow pressure applied to the cylindrical frame portion 3 itself will increase, causing distortion of the fixed frame portion 1 (especially the mounting portion with screws 21b and 22b), detachment of the fixed frame portion 1 from the base portion 90, and a decrease in aesthetic appeal as the fixed frame portion 1 protrudes from the base portion 90 even under normal conditions. Therefore, this is undesirable.

[0062] In this way, the cover portion 5 is designed not to come off the fixed frame portion 1 unintentionally, ensuring the robustness of the water-sealing function of the underfloor ventilation opening.

[0063] For reference in understanding the underfloor ventilation opening water seal 100 and the underfloor ventilation opening structure 200, Figures 6 to 10 show six-view drawings of the underfloor ventilation opening water seal 100 described above. In this embodiment, since the underfloor ventilation opening water seal 100 is symmetrical, the side view shown in Figure 8 shows only the right side when the front view of the underfloor ventilation opening water seal 100 shown in Figure 6 is used as the reference point for the field of view.

[0064] As described above, it is possible to provide an underfloor ventilation opening water stopper, a retaining seat for the cover of an underfloor ventilation opening water stopper, and an underfloor ventilation opening structure with a water stopper function that achieve both ease of installation of the underfloor ventilation opening water stopper and ease of installation of the cover of the water stopper, and robustness of the water stopper function of the underfloor ventilation opening.

[0065] [Another embodiment] (1) In the above embodiment, the case described was one in which the lid portion 5 has a lid surface portion 50 and a plate-shaped magnet 6 disposed on the surface (inner surface) of the lid surface portion 50 facing the ventilation opening 8. It was also explained that the plate-shaped magnet 6 may be fixed to the inner surface of the lid surface portion 50 by adhesive or magnetic attraction. It was also explained that the plate-shaped magnet 6 is attracted to the annular plate portion 10 by magnetic force, thereby stably holding the lid portion 5 on the annular plate portion 10 when the lid portion 5 is installed. However, the plate-shaped magnet 6 is not limited to being fixed to the inner surface of the lid surface portion 50. For example, the plate-shaped magnet 6 may be fixed to the surface of the annular plate portion 10 facing the lid surface portion 50 by adhesive or magnetic attraction. In this case, if the lid surface portion 50 is made of a magnetic material, the plate-shaped magnet 6 will be attracted to the lid surface portion 50 by magnetic force, thereby stably holding the lid portion 5 on the annular plate portion 10 when the lid portion 5 is installed. Furthermore, the plate-shaped magnet 6 does not need to be fixed to either the lid portion 50 or the annular plate portion 10. If the lid portion 50 and the annular plate portion 10 are made of magnetic material, they will be attracted to the plate-shaped magnet 6, and the lid portion 5 will be stably held by the annular plate portion 10 when the lid portion 5 is attached.

[0066] (2) In the above embodiment, the case in which the cylindrical frame portion 3 has an outer plate portion 4 was described, but the outer plate portion 4 is not essential.

[0067] (3) In the above embodiment, the case in which the fixed frame portion 1 has a fixed plate portion 2 has been described, but the fixed plate portion 2 is not essential. If the fixed frame portion 1 does not have a fixed plate portion 2, for example, the fixed frame portion 1 may be fixed to the ventilation opening 8 by bonding the annular plate portion 10 of the fixed frame portion 1 to the base portion 90 or by screwing it in.

[0068] (4) In the above embodiment, the case in which the fixing plate portion 2 extends from both inner ends in the width direction of the opening 11 of the annular plate portion 10 has been described, but the form of the fixing plate portion 2 is not limited to this. For example, the fixing plate portion 2 may extend from both the lower and upper ends of the opening 11 of the annular plate portion 10. Alternatively, the fixing plate portion 2 may be formed in a cylindrical shape that can be fitted into the ventilation opening 8 (a cylindrical shape extending from the entire circumference of the end of the opening 11 of the annular plate portion 10).

[0069] Furthermore, the configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, provided that no inconsistencies arise. Moreover, the embodiments disclosed herein are illustrative, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the object of the present invention. [Industrial applicability]

[0070] This invention can be applied to underfloor ventilation opening water stoppers, retaining seats for underfloor ventilation opening water stoppers, and underfloor ventilation opening structures with water stopper functions. [Explanation of Symbols]

[0071] 1: Fixed frame section 10: Annular plate section 100: Underfloor ventilation opening water stopper 11: Opening 2: Fixed plate part 200: Underfloor ventilation structure 21: Fixed plate 21a: Through hole 21b: Bis 22: Fixed plate 22a: Through hole 22b: Bis 3: Cylindrical frame section 4: Outer panel part 5: Lid 50: Lid surface part 51: Lid edge 52: Handle part 6: Plate-shaped magnet 8: Ventilation vent 9: Building 90:Foundation part 91: Draining 95: Sealant 96: Sealant x: Depth direction y: width direction z: Vertical direction

Claims

1. A fixing frame that can be fixed to the ventilation opening under the floor of the building, The lid portion, which has a plate-shaped lid surface portion, is held in the fixed frame portion, The aforementioned fixed frame portion is An annular, plate-shaped annular plate portion that conforms to the shape of the ventilation opening and has an opening, It has a cylindrical frame portion extending from the outer periphery of the annular plate portion in a direction intersecting the plate surface of the annular plate portion, The lid portion is fitted inside the cylinder of the cylindrical frame portion and is held in place by the fixed frame portion by making surface contact with the annular plate portion. The cylindrical frame portion extends radially inward from the end opposite to the annular plate portion in the extending direction of the cylinder, and has an outer plate portion that runs along the annular plate portion. The aforementioned fixing frame portion has a fixing plate portion that extends from the annular plate portion in a direction intersecting the annular plate portion, and whose plate surface conforms to the annular shape of the annular plate portion, making it a waterproofing device for underfloor ventilation openings.

2. The underfloor ventilation opening water stopper according to claim 1, wherein the lid portion is held by magnetic force to the annular plate portion.

3. The underfloor ventilation opening water stopper according to claim 1, wherein the cover portion has a cover edge portion extending from the end of the cover surface portion in a direction intersecting the cover surface portion.

4. The underfloor ventilation opening water stopper according to claim 3, wherein the lid portion has a handle portion extending from the lid edge portion in the in-plane direction of the lid surface portion.

5. The ventilation openings under the building's floor, A fixing frame portion fixed to the aforementioned ventilation opening, The system comprises a lid portion having a plate-shaped lid surface portion, which is held in the fixed frame portion, The aforementioned fixed frame portion is An annular, plate-shaped annular plate portion that conforms to the shape of the ventilation opening and has an opening, The annular plate portion has a cylindrical frame portion extending from its outer periphery in the direction opposite to the building, The annular plate portion is positioned such that its opening overlaps with the ventilation opening and is in contact with the outer surface of the building. The lid portion is fitted inside the cylinder of the cylindrical frame portion and is held in place by the fixed frame portion by making surface contact with the annular plate portion. The cylindrical frame portion extends radially inward from the end opposite to the annular plate portion in the extending direction of the cylinder, and has an outer plate portion that runs along the annular plate portion. The fixed frame portion has a fixed plate portion that extends from the annular plate portion along the inner surface of the ventilation opening and is in surface contact with the inner surface of the ventilation opening, forming an underfloor ventilation opening structure.

6. The underfloor ventilation opening structure according to claim 5, wherein a sealing material is applied to the outer surface of the building and the outer surface of the cylindrical frame portion to fill the gap between the outer surface of the building and the fixed frame portion.

7. The underfloor ventilation structure according to claim 5, wherein a sealing material is applied to the side of the building opposite to the side of the outer panel facing the ventilation opening, to fill the gap between the building and the fixed frame.

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