Attic ventilation device

Abstract

To provide an attic ventilation device in which a rotatable water stop plate is arranged in an air passage of the attic ventilation device and the water stop function of the water stop plate is maintained.SOLUTION: The present invention is an attic ventilation device including: an outside air opening, an air vent, an air passage; a water stop plate disposed between the outside air opening and the opening at a predetermined distance from each other, with an upper edge pivotally supported and a lower edge serving as a free end, and with a part of the air passage formed below the lower edge when in a hanging state; and a stopper disposed on the outside air opening side of the water stop plate and capable of abutting against the water stop plate. When the air pressure in the air passage becomes higher on the outside air opening side than on the attic side, the water stop plate rotates toward the air vent and closes the air passage, and when the air pressure in the outside air opening side becomes lower than on the attic side, the water stop plate abuts against the stopper, maintaining the hanging state and not closing the air passage.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a device for controlling ventilation between the attic and the outside air of a building. [Background technology]

[0002] In order to reduce deterioration of the attic, it is common practice to install a ventilation device on part of the roof of the building, which has a ventilation passage between the attic space of the building and the outside air, to provide ventilation.

[0003] In addition, in bad weather, to prevent rainwater from entering the attic space from the outside air side through this ventilation passage, an opening / closing valve may be installed that rotates and closes the ventilation space when a large amount of air pressure is applied to the ventilation passage from the outside air.

[0004] The following prior art exists for such an on-off valve in a ventilation passage. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2003-206606 [Patent Document 2] Patent Publication No. 2008-304140

[0006] The device disclosed in Patent Document 1 is attached to the eaves of a building. This device has an on-off valve (12) that hangs down near a horizontally opening ventilation opening (11). This on-off valve (12) is a plate that is pivotally supported at the top and free at the bottom.

[0007] In strong winds, the on-off valve (12) rotates to close the ventilation opening (11), thereby preventing rainwater from entering the ventilation passage (9). On the other hand, when the wind pressure weakens, the on-off valve (12) sags under its own weight, opening the ventilation opening (11) and restoring the ventilation function.

[0008] In addition, the device disclosed in Patent Document 2 has a plate-shaped blocking member (52) that is similarly pivoted at the upper end and free at the lower end attached to the ventilation passageway that continues from the ventilation opening (26) to the ventilation opening (32) of the building, and in the event of strong winds, the blocking member (52) rotates to close the ventilation passageway.

[0009] In this conventional technology, the blocking member (52) is positioned in front of the ventilation opening (26), so even if rainwater enters through the ventilation opening (26) with weak pressure, the blocking member (52) also functions as a water stop that causes the rainwater to adhere to its surface and drip straight down.

[0010] As such, in the past, there have been configurations such as those in Patent Documents 1 and 2 that use a rotatable member to close the ventilation space during strong winds, and there has also been prior art such as that in Patent Document 2 in which the closing member for the ventilation space is also used as a water stop to block rainwater. Summary of the Invention [Problem to be solved by the invention]

[0011] However, when the pressure on the outside air side becomes low, the rotating member that functions as the opening / closing valve (12) or the blocking member (52) may rotate toward the outside air opening that takes in outside air and block it, which may obstruct the airflow from the attic space to the outside air and impair the ventilation function.

[0012] Furthermore, when using this rotating member as a water stop, it is necessary to keep it in a hanging position as much as possible, and if it is tilted too far toward the outside air vent, its function will be impaired. Furthermore, if the rotating member comes into contact with the outside air vent with too much force, it will generate unnecessary noise.

[0013] Therefore, the present invention aims to solve the problems associated with such conventional fascia boards, and to provide a ventilation device that, when a large amount of pressure is applied to the water stop through the outside air opening, rotates the water stop toward the vent opening on the attic side to prevent rainwater from entering, and that can maintain its function as a water stop that catches rainwater in front, without rotating toward the outside air opening, even when the pressure on the outside air opening side is low. [Means for solving the problem]

[0014] A typical attic ventilation device that solves the above problem is a long-shaped attic ventilation device that is attached to the attic of the roof of a building so as to close it, and controls the flow of outside air between the attic and the outside air. It has an outside air opening that takes in outside air, an air vent that communicates with the attic, an air passage formed between the outside air opening and the air vent, a water stop plate that is arranged between the outside air opening and the opening at a predetermined distance from each, with its upper edge pivoted and its lower edge being a free end, and a part of the air passage formed below the lower edge, and a stopper that is arranged on the outside air opening side of the water stop and can abut against the water stop, and is characterized in that when the air pressure in the air passage on the outside air opening side becomes higher than that on the attic side, the water stop plate rotates toward the air vent and closes the air passage, and when the air pressure on the outside air opening side becomes lower than that on the attic side, the water stop plate abuts against the stopper and maintains its hanging state, so as not to close the air passage. [Effects of the Invention]

[0015] In this invention, when the outside air pressure becomes higher than the attic side and there is a risk of rainwater entering through the outside air opening, the water stop rotates toward the attic vent to close the ventilation passage. On the other hand, when the outside air pressure becomes lower, the stopper keeps the water stop in a hanging position to catch rainwater from the outside air opening, preventing rainwater from entering while maintaining ventilation. [Brief explanation of the drawings]

[0016] [Figure 1]1 is a cross-sectional view of a roof structure equipped with an attic ventilation device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view of the attic ventilation device of the same embodiment. [Figure 3] FIG. 2 is a perspective view of the attic ventilation device of the same embodiment. [Figure 4] 10(a) to 10(c) show examples of installation and use of the attic ventilation device of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of an attic ventilation device according to the present invention will be specifically described with reference to FIGS. 1 to 3. FIG.

[0018] The attic ventilation device A in the first embodiment is a long building material consisting of a metal main body 1 having a U-shaped cross section in part, and a synthetic resin water stop member 2 attached to the inside of the U-shape of the main body 1.

[0019] As shown in Figure 1, the main body 1 has, from left to right, a first horizontal piece 11 that serves as a guide when attaching the ventilation device A to the fascia base 52 of the building 50 to which the fascia material 51 is attached, a first vertical piece 12 that extends downward from the end of the first horizontal piece 11 and forms the front of the outside air side O of the ventilation device A, a second horizontal piece 13 that extends horizontally from the lower end of the first vertical piece 12 and forms the bottom surface of the ventilation device A, and a second vertical piece 14 that extends upward from the end of the second horizontal piece 13.

[0020] The second vertical piece 14 has a groove 14a formed in the center on the first vertical piece 12 side, the groove 14a having a width equal to or slightly larger than the thickness of the eaves soffit material 55 below the joist 54, and a convex surface 14b is formed below the groove 14, and a protruding piece 14c is formed above the groove 14. As will be described later, the edge of the eaves soffit material 55 can be inserted into the recess of the groove 14a, allowing the eaves soffit material 55 to be neatly stored.

[0021] Additionally, the first vertical piece 12 is formed with slits 3, which are vertically long rectangular openings that are intermittently continuous and serve as outdoor air openings. This first vertical piece 12 is inclined upward so that it is tilted more toward the second vertical piece 14, and when the ventilation device A is attached to the building 50, the gap with the back surface of the fascia material 51 is narrowed downward, making it difficult for rainwater to penetrate. Furthermore, by narrowing the first vertical piece 12 upward, the slits 3 can be made less visible, resulting in a favorable design.

[0022] The main body 1 having such a cross-sectional shape is integrally formed from a metal such as steel, stainless steel, or aluminum by a processing method such as press bending, roll forming, or extrusion.

[0023] In cross section, the waterstop member 2 has a waterstop piece 21, which is a locking plate that hangs down vertically, and a horizontal plate 22 that extends horizontally from the upper edge of the locking plate 21 so as to intersect with the hanging direction of the waterstop plate 21, and further a stopper 23 is formed integrally between the waterstop piece 21 and the horizontal plate 22.

[0024] Regarding the relationship between the water stop piece 21 and the horizontal plate 22, the upper edge of the water stop piece 21 is narrow and forms a hinge portion 21a that is flexible relative to the horizontal plate 22, while the lower end of the water stop piece 21 is a free end 21b, both of which have an L-shaped cross section. A gap is formed between the lower side of the water stop piece 21 and the first horizontal plate 13 of the main body 1, forming a space.

[0025] A gap is formed between this water-stopping piece 21 and the second vertical piece 14 of the main body 1, and an air vent 4 that communicates with the attic space S is formed here when the ventilation device A is installed in a building.

[0026] The stopper 23 is formed below the horizontal plate 22, parallel to the water stop piece 21. The lower end of the base 23a of the stopper 23 branches into two, one of which becomes a bump portion 23b that protrudes toward the water stop piece 21, and the other of which becomes an abutment portion 23c that abuts against the first vertical piece 12 of the main body 1.

[0027] The waterstop member 2 is integrated with the main body 1 by placing its horizontal plate 22 on the top surface of the first horizontal piece 11 of the main body 1 and fixing it with double-sided adhesive tape or the like. At this time, a space is created between the waterstop piece 21 and the second horizontal piece 13 of the main body 1 below, forming a space F2 below the waterstop, and the internal space of the main body 1 is divided into a space F1 behind the slit and a space F3 on the vent side.

[0028] That is, inside the attic ventilation device A, a ventilation passage F is formed that runs from the slit 3, passes under the water stop piece 21, and communicates with the vent 4. This ventilation passage F runs from outside air O through the space behind the slit F1, the space under the water stop F2, and the vent-side space F3 to the attic space S, and the ventilation passage F can be used as a ventilation passage to ventilate the inside and outside of the attic space S.

[0029] 2, the water stop piece 21 can rotate relative to the main body 1 by means of a hinge portion 21a at the upper edge connected to the horizontal plate 22. The rotation range is the sum of the angle θ1 (approximately 40°) from the substantially vertically hanging state until it abuts against the second vertical piece 14, and the angle θ2 (approximately 5°) from the same hanging state until it reaches the bump portion 23b of the stopper 23.

[0030] Therefore, when the air pressure of the outside air O becomes higher than that of the attic space S by a difference of a predetermined value or more, the water stop piece 21 moves toward the attic space S to close the vent 4 and block the air passage F. In other words, during strong winds and rain such as a typhoon, the water stop piece 21 acts as an opening and closing valve for the air passage F, preventing rainwater from entering the attic space S.

[0031] Next, when the pressure difference between the outside air O and the attic space S is below a predetermined value, the rigidity of the hinge portion 21a of the water stop piece 21 and the weight of the water stop piece 21 prevent the water stop piece 21 from moving at a large angle.

[0032] Furthermore, even if the atmospheric pressure of the outside air O becomes lower than that of the attic space S by a pressure difference equal to or greater than a predetermined value, the water stop piece 21 is pushed toward the first vertical piece 12 where the slit 3 is formed and rotates, but the bump portion 23b of the stopper 23 abuts against the surface of the water stop piece 21, preventing it from rotating beyond the above-mentioned rotational tolerance angle θ2. Therefore, the water stop plate 23 does not abut against the first vertical piece 12 and does not close the air passage F.

[0033] In this way, the water stop plate 23 is maintained in a substantially hanging state, so that the water stop plate 23 can function as a water stop plate 23, receiving rainwater that enters through the slits 3 on its surface and allowing it to drip downward.

[0034] Furthermore, since the bump portion 23b of the stopper 23 is inclined diagonally downward, even if the water stop piece 21 abuts against it with a large force, it will bend downward and deform, and since the amount of deformation is large, the water stop piece 21 can be stopped with a small impact.

[0035] The waterstop member 2, in which the waterstop pieces 21, the horizontal plates 22, and the stoppers 23 are integrally formed from synthetic resin, can be manufactured by injection molding or extrusion molding.

[0036] In this case, the threshold for rotating the water stop piece 21 can be set by adjusting the hardness of the synthetic resin used to mold the water stop member 2 and the thickness of the hinge portion 21a, and by preparing multiple water stop members 2, it is possible to provide an attic ventilation device A that is optimal for the characteristics of the area where the building is being constructed.

[0037] According to the attic ventilation device A of this embodiment configured as described above, when wind and rain blow in through the slit 3 with a large pressure difference, the water-stop piece 21 rotates toward the attic vent and acts as an opening / closing valve to close the ventilation passage F, preventing rainwater from entering the attic space S.

[0038] On the other hand, when the wind and rain are weak or the outside air side becomes negative pressure, the rigidity of the hinge portion 21a of the water stop piece 21 itself and the action of the stopper 3 keep the water stop piece 21 in a hanging position, so that rainwater blowing in from the outside air opening can be caught, preventing rainwater from entering while maintaining ventilation.

[0039] Furthermore, since the stopper 23 is made of synthetic resin and the water-stopping piece 21 bends and deforms as described above when it comes into contact with the stopper 23, it can absorb the impact and at the same time provide a sound-deadening effect.

[0040] As mentioned above, for fire prevention purposes, it is preferable that the main body 1 of the attic ventilation device A be made of metal such as steel or stainless steel. In this case, a recess is generally provided in the cross section to attach an on-off valve (water stop piece) to the ventilation material main body, and the on-off valve is fitted into this recess, making them an integrated structure.

[0041] However, in such a configuration, a bending process is required to create a recess in the main body, which increases the number of bending steps and increases costs.In addition, due to the need to set one side of the bent portion to a certain dimension or larger in consideration of the processing mold, the appearance becomes larger due to the recess, which in turn causes problems such as obstruction of the ventilation passage.

[0042] Therefore, as in this embodiment, by forming a horizontal piece 22 that can be fixed to one side of the main body 1 in a planar manner using double-sided adhesive tape or the like integrally with the water-stopping piece 21, the water-stopping piece member 2 consisting of these can be fastened to the main body 1 as a unit at the construction site, and since only temporary fastening is required at the manufacturing stage, the manufacturing process is simplified.

[0043] Next, a method for installing the attic ventilation device A will be described with reference to FIGS.

[0044] Figure 4(a) shows the structure when the eaves soffit material 62 is sloped. In the attic ventilation device A of this embodiment, the fascia board base 61 of the fascia board material 51 is installed at a slope, and the attic ventilation device A is attached to the underside of this fascia board base 61. By inserting the end of the eaves soffit material 62 into the groove portion 14a, the eaves soffit material 62 can be installed at a neat slope.

[0045] Figure 4(b) shows the structure when attached to the gable section 70 of a shed roof or the like. In this method of use, the first horizontal piece 11 and the second vertical piece 14 of the attic ventilation device A are used as guides and butted against the rafters 71 and furring strips 72, respectively, with the first horizontal piece 11 of the attic ventilation device A fixed to the underside of the former, and the convex surface 14b and the protruding piece 14c of the second vertical piece 14 pressed against the surface of the latter.

[0046] Furthermore, waterproofing is provided to the gable portion 70 by filling the gap between the exterior wall material 73 attached to the outside of the furring strips 72 and the underside of the second horizontal piece 13 of the attic ventilation device A with sealing material 74. The gable portion 70 is covered with metal sheeting 75 from the roof surface to the gable, but the lower part 75 on the gable side of the metal sheeting 75 covers the front of the slits 3 of the attic ventilation device A, so that the slits 3 do not directly face the outside air O.

[0047] Figure 4(c) shows the structure of attic ventilation device A when it is attached to the ridge top 80 of a gable roof. In this usage method, as with the above, it is attached to the rafters 81 and furring strips 82, with the first horizontal piece 11 of attic ventilation device A fixed to the underside of the former, and the convex surface 14b and protruding piece 14c of the second vertical piece 14 pressed against the surface of the latter. The relationship between the attic ventilation device A, exterior wall material 83, sealing material 84, metal sheeting 85, and lower gable side 85 also has a similar structure.

[0048] As explained above, the attic ventilation device A has grooves 14a formed in the second vertical pieces 14 into which the ends of the eaves soffit members 55, 62 can be fitted, and the ends of the upper and lower convex surfaces 14b, 14c are aligned, so that if you want to omit the eaves soffit member and shorten the eaves overhang, you can reduce the overhang width of the attic ventilation device A. Also, by fitting it against the furring strips 72, 82, the attic ventilation device A can be installed stably.

[0049] [Other variations] The configuration of the attic ventilation device A is not limited to that described above, and it may be structured to more reliably maintain the water stop plate in a hanging position by attaching a weight to the lower end of the water stop piece 21 so that it is heavier, and the same effect can be achieved by making the water stop plate portion 21 out of metal to give it weight.

[0050] Furthermore, the rotation angle θ2 of the water stop piece 21 can be set freely, and the rotation angle θ2 can be set to zero or a negative value as long as it is within a range in which the function of the water stop piece 21 can be fulfilled. [Explanation of symbols]

[0051] A...Attic ventilation system F...Ventilation passage O: Outside air S...Attic space 1...Main unit 2...Waterstop member 3...Slit (outside air opening) 4...Ventilation hole 11...1st horizontal piece 12...First vertical piece 13…Second horizontal piece 14...Second vertical piece 14a...Groove (for inserting soffit material) 21…Water stop piece (water stop plate) 21a...hinge part 21b…Free end 22…Horizontal board 23...Stopper 23b...Bump section

Claims

1. A long attic ventilation device that is attached to the roof of a building so as to close the attic and controls the ventilation between the outside air and the attic. An outside air opening that takes in outside air; A vent communicating with the attic; an air passage formed between the outside air opening and the air vent; a water stop plate disposed between the outside air opening and the opening at a predetermined distance from each other, with an upper edge pivotally supported and a lower edge being a free end, and further with a part of the air passage formed below the lower edge when in a hanging state; a stopper that is disposed on the outside air opening side of the water stop and is capable of contacting the water stop, This attic ventilation device is characterized in that when the air pressure inside the air duct becomes higher on the outside air opening side than on the attic side, the water stop rotates toward the air vent to close the air duct, and when the air pressure inside the outside air opening side becomes lower than on the attic side, the water stop abuts against the stopper to maintain the hanging position and not close the air duct.

2. The attic ventilation system according to claim 1, The attic ventilation device comprises a metal body having the ventilation path and a synthetic resin water stop member having the water stop, An attic ventilation device characterized in that the waterstop member has a horizontal plate extending horizontally so as to intersect with the hanging direction of the waterstop member, and the waterstop member is fixed to the main body by the horizontal plate.

3. The attic ventilation system according to claim 2, An attic ventilation device characterized in that the stopper is formed integrally with the water stop member using synthetic resin.

4. The attic ventilation system according to any one of claims 1 to 3, The ventilation device includes a first vertical piece that forms the outside air opening, and a second vertical piece that is positioned below the air vent and faces the first vertical piece, An attic ventilation device characterized in that the second vertical piece has a groove formed therein into which the edge of the eaves material of the building can be inserted.

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