JP7260143B2 - Underfloor ventilation structure - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water shut off device that is detachably attached to an underfloor ventilation opening of a building to prevent flooding.

In many buildings, it is stipulated by law that a ventilation opening should be installed under the floor to prevent moisture, and that the ventilation opening should have a structure that prevents rats from entering. During heavy rain, water can enter through this ventilation opening and cause subfloor flooding.

In order to solve this problem, Patent Document 1 below discloses that a frame portion having a large number of ventilating communication holes formed through a seal portion is attached to the periphery of the ventilation opening, and the lower end of the frame portion protrudes outward during heavy rain. A water stop device is disclosed in which the cover is inserted sideways into the insertion groove to cover the ventilation opening, and the upper end of the cover is pressed and fixed with a snap lock attached to the frame. At the entrance of the space leading to both the ventilation opening and the underfloor ventilation opening, a mouse-back part with an opening for discharging moisture is installed, and it is supported by a hinge so that it can tilt up and down to switch between the upper position and the lower position. , when switched to the lower position, air can flow through the barbs, and when switched to the upper position, the barbs are closed to prevent water intrusion.

In addition, in Patent Document 3, an underfloor ventilation opening composed of a guide part and a water stop part is installed under the floor, and a spherical float is attached to the lower part where the air passage that constitutes the underfloor ventilator expands. The spherical float is always placed on the lower side of the underfloor ventilation port by its own weight so as not to block the air circulation through the airflow passage. An underfloor water ingress prevention device is disclosed that blocks water intrusion.

JP 2017-008655 A JP 2011-220048 A JP 2016-132869 A

In the water stop device described in Patent Document 1, the lid is attached to the insertion groove of the frame, positioned so as to block the ventilation opening, and then fixed at some point with a snap lock. It is necessary to install it by pressing, and it takes time to install.
The flood prevention device described in Patent Document 2 may not operate normally due to clogging of the hinge with earth and sand.

The drainer described in Patent Document 3 has a complicated structure and is costly to manufacture, lacks the reliability of the water stopping function of the spherical float, and cannot be used to check whether the spherical float reliably closes the constricted portion of the air flow passage. Difficult to confirm.
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems and to provide a water stop device that can be easily attached to and removed from a ventilation opening and that can reliably stop water.

In the invention according to claim 1, an opening formed in a foundation, a frame applied to the outer peripheral edge of the opening of the foundation from the outside and attached to the outer peripheral edge of the opening of the foundation , and integrally formed in the frame A ventilation port member including at least one of a reinforcing member and a wire mesh attached and stretched within a frame and attached to the opening of the foundation; Magnetic particles with magnetic force are mixed in one of the part of the plate or sheet that hits the frame and the frame of the ventilation port member , and the other is made of a ferromagnetic material. and
The invention according to claim 2 is the invention according to claim 1, wherein the vent member includes both the reinforcing member and the wire mesh.

The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2 , the ventilation port member is an existing ventilation port member , the frame is a ferromagnetic material, and magnetic powder is mixed in the plate or sheet. and
The invention according to claim 4 is characterized in that in the invention according to any one of claims 1 to 3 , the plate or sheet has flexibility.

According to the inventions of claims 1 and 2 , the plate or sheet is magnetically attached to the frame of the ventilation port member , but the plate or sheet has a simple structure and does not require much storage space. , it is easy to attach and detach, and it is possible to reliably stop water.
According to the third aspect of the invention, it can be easily attached to an existing ventilation port member . In addition, by mixing magnetic particles with magnetic force into the plate or sheet, the product can be stored by attaching it to, for example, a refrigerator in the home. In addition, when magnetic powder is attached to the ventilation opening, there is a risk that iron powder that rolls up around the ventilation opening or flying iron powder adheres to the ventilation opening and makes it easy to stain the ventilation opening. Therefore, this problem does not occur.

According to the fourth aspect of the invention, the plate or sheet can be rolled up and stored so as not to be bulky.

Sectional view of underfloor with ventilation openings. Front view of the vent. FIG. 4 is an enlarged cross-sectional view of a main part in which a ventilation port is attached to the outer peripheral edge of the opening of the foundation; Sectional view of the ventilation opening installed in the opening of the foundation. The front view of the magnet sheet attached to the ventilation port. Sectional drawing of the ventilation opening which attached the magnet sheet shown in FIG. 5 to the opening outer periphery of a foundation. Sectional drawing which attached the magnet sheet shown in FIG. 5 to the opening outer periphery of a foundation.

Hereinafter, the ventilation opening according to the present invention will be described with reference to the drawings.
FIG. 1 shows an underfloor reinforced concrete base 2 with a ventilation opening 1. As shown in FIG. 3, a porous material attached to the entire surface of the frame 3, for example, a wire mesh 5 whose upper and lower and left and right edges are attached and stretched to the frame 3 by welding, for example, and integrated with the frame 3 within the frame. The frame 3 is larger in size than the outer peripheral edge of the opening of the foundation 2 (indicated by reference numeral 7 in FIGS. 3 and 4), and extends outside the opening. It is applied to the peripheral edge from the outside and attached by fasteners such as bolts and screws (not shown), or it is attached by an adhesive.

FIG. 3 shows an example of attachment with adhesive. Frame 3 is attached with adhesive 8 to the outer peripheral edge of opening 7 of foundation 2 to which ventilation port 1 is applied, and around frame 3 A sealing material 9 is attached for waterproofing. The ventilation opening 1 of the above embodiment is attached to the periphery of the opening, but is attached within the opening 7 in the embodiment shown in FIG.

When the ventilation opening 1 is installed in the opening as shown in FIG. 4, the ventilation opening 1 has the same shape and size as the opening 7, and can be installed by pressing it from the outside into the opening 7 after the construction of the foundation, or by inserting it into the mold at the time of construction of the foundation. It can be installed by pouring concrete while it is attached to the frame. When it is installed at the time of foundation construction, it is usually formed larger in size than the ventilation opening 1 and is fixed so that it cannot be removed.

The wire mesh 5 constituting the ventilation opening 1 of the above-described embodiment can prevent not only rats but also insects from entering. In FIG. 1, 11 is a reinforcing bar embedded in the foundation 2, and 12 is the ground. The frame 3 of the ventilation opening 1 may have the reinforcement member 6 in a shape other than a rhombus, or may be formed only by the frame 3 by omitting the reinforcement member 6 .

FIG. 5 shows a flexible rubber or resin magnet sheet 14 having the same rectangular shape as the frame 3, slightly smaller but almost the same size, and uniformly mixed with magnetic powder. , the ferromagnetic frame 3 and the rhombic reinforcing member 6 by magnetic force.

This magnet sheet 14 is usually stored rolled up so as not to be bulky, or is attached to and held on the side of an iron appliance in the home, for example, a steel refrigerator, and is flooded from the ventilation opening 1, or is exposed to water. When there is a possibility that the magnet sheet 14 will be removed, the magnet sheet 14 is peeled off from the refrigerator, carried to the ventilation opening 1, and positioned and attached to the frame 3 attached to the outer peripheral edge of the opening as shown in FIG.

When the water has receded and there is no danger of flooding, the magnet sheet 14 is peeled off from the frame 2 so as not to hinder ventilation at the ventilation opening 1.例文帳に追加
The inventors of the present invention divided the inside of the box into two by the ventilation opening 1 with the magnetic sheet 14 attached to the frame 3, filled one with water, and confirmed whether or not there was water leakage to the other. As a result, water leakage occurred. No peeling of the magnet sheet 14 occurred.

When the ventilation opening 1 is installed in the opening, as shown in FIG. 7, a ferromagnetic frame 16 is attached to the outer peripheral edge of the opening using an adhesive as in FIG. After that, the magnet sheet 14 is attached to the frame 16. - 特許庁

The magnet sheet 14 of the above embodiment can be attached to the existing ventilation opening 1, but in this case, if the frame of the existing ventilation opening is not made of a ferromagnetic material, the magnet sheet 14 cannot be attached by the magnetic force of the magnet. A ferromagnetic frame is fixed to the existing ventilation opening frame 1 by fixing means such as an adhesive or screws, and then the magnet sheet 14 is attached as described above. It is desirable to interpose a sheet-like sealing material for sealing between the frame of the existing ventilation opening and the ferromagnetic frame.

In the above embodiment, an example using the flexible magnet sheet 14 was shown, but in another embodiment, the frame 3 itself is made of a magnet, or the magnet sheet is attached to the frame. In this case, as the sheet or plate covering the frame, a ferromagnetic sheet or plate that does not contain magnetic powder and does not have magnetic force is used. It doesn't have to be.

Reference Signs List 1 Ventilation port 2 Foundation 3 Frame 5 Wire mesh 6 Reinforcing material 7 Opening 14 Magnet sheet

Claims (4)

an opening formed in the base;
At least one of a frame that is applied to the outer peripheral edge of the opening from the outside and attached to the outer peripheral edge of the opening , a reinforcing material that is integrally formed in the frame , and a wire mesh that is attached and stretched in the frame. a vent member attached to the opening comprising:
a plate or sheet applied to the frame to close the opening and stop water ;
An underfloor ventilation opening structure characterized in that a portion of said plate or sheet that contacts said frame and magnetic particles having magnetic force are mixed in one of said frames, and the other of said frame is made of a ferromagnetic material. 2. The underfloor vent structure according to claim 1, wherein said vent member includes both said stiffener and said wire mesh. 3. The underfloor ventilation opening structure according to claim 1, wherein the ventilation opening member is an existing ventilation opening member , the frame is a ferromagnetic material, and the magnetic powder is mixed in the plate or sheet. . 4. The underfloor ventilation opening structure according to claim 1, wherein said plate or sheet is flexible.

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