JPH0774521B2 - Attic ventilation tiles - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an attic ventilation roof tile that is attached to an inclined surface of a tiled roof and performs attic ventilation.

(Prior Art) Moisture and hot air easily accumulate in the attic space of a house (hereinafter referred to as the "attic"), which adversely affects the life of the building. Therefore, it is necessary to provide appropriate ventilation means.

Therefore, in a conventional residential building, for example, as shown in FIG. 6, a hollow cylindrical ventilation tube that vertically penetrates through a substrate (2) having the same shape as an adjacent roof tile (1) is formed in the center thereof. A ventilation device having a structure in which (3) is integrally formed, and the upper end of the ventilation cylinder (3) is covered with a covered rain hood (4) having a cylindrical shape so that air can flow, that is, a so-called ventilation roof tile is used.
The above ventilation tile (A) 'is installed in combination with other roof tiles (1) on the roof surface at the position where two or three roof tiles are lowered from the ridge, and ventilation is provided in the base plate (5). Ventilation passage (7) and ventilation cylinder (3) in the ventilation cylinder (3) from the hole (6)
The air in the attic (9) is exhausted to the outside through a gap (8) between the and the rain shield hood (4).

(Problems to be Solved by the Invention) However, in such a conventional attic ventilation tile (A) ', the outer surface of the ventilation tube (3) has a simple cylindrical surface shape. There has been a problem that rainwater flowing along the board (2) is blown up by strong winds and penetrates into the ventilation passageway (7) along the outer surface of the ventilation cylinder (3).

Further, such a phenomenon is most likely to occur when the wind directly collides with the inclined surface of the roof to which the ventilation tile (A) 'is attached.

Of course, it is conceivable to lengthen the upward protrusion of the ventilation tube (3) and vertically extend the gap (8) with the hood (4) to prevent the infiltration of rainwater, but in this case, the device becomes larger. On the contrary, there is a problem that the wind pressure is more likely to be received and the natural ventilation effect is reduced due to the increase in resistance.

Separately from this, the ventilation passage (7) inside the ventilation cylinder (3)
It is possible to provide a damper device to prevent rainwater from entering, but in this case, the structure becomes complicated and the device cost rises, and the operation becomes complicated and there is a difficulty in practical use.

The present invention has been made by focusing on the problem of rainwater infiltration into the attic due to the blowing of wind that the conventional attic ventilation roof tiles have, and the entire circumference of the outer surface of the ventilation tube forming the wall of the ventilation passage. By providing the eaves-like rain-bending portion on the inside, rainwater is prevented from entering the ventilation passage along the outer surface of the ventilation cylinder, and thus the above-mentioned problems are not solved.

(Means for Solving Problems) A configuration of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment.

The attic ventilation roof tile (A) of the present invention integrally forms a cylindrical ventilation cylinder (12) vertically penetrating the substrate (10) substantially at the center of the roof-shaped mounting substrate (10), The ventilation tube (12) is configured by covering the upper end of the ventilation hood (13) with a hood (13) with a gap (14) of a required width allowing gas to pass through. The lower end of the hood is bent inward to be perpendicular to its tip. Skirt part extending downward (16)
And a mountain-shaped rain return rib (25) is projected on the inner surface of the skirt portion (16) over the entire circumference, while on the ventilation cylinder outer surface (17), a little from the position where the rain return rib (25) faces. Eaves-shaped rain bar (18) around the entire circumference in the lower position
Is formed so as to project.

(Operation) The attic ventilation roof tile (A) of the present invention having the above-mentioned configuration, when the roof tile is used by attaching it to the roof, uses the ventilation passage (20) in the ventilation cylinder (12) and the ventilation cylinder (12). Air in the attic (35) is discharged to the outside through a gap (14) between the outer surface (17) and the inner surface of the hood (13).

In addition, in the event of heavy rain or strong wind, rainwater flowing over the substrate (10) due to the action of the wind blown up against the inclined surface of the roof travels along the outer surface (17) of the ventilation cylinder (12) and enters the gap (14). However, since the eaves-shaped rain return part (18) is formed on the outer surface (17) of the ventilation cylinder (12) over the entire circumference, rainwater is contained in the rain return part (18). Does not rise from there and flows to the leeward side along the lower edge of the rain return part (18), so that the entry into the gap (14) is prevented.
Even if raindrops bounce off at the rain return section (18), most of the raindrops collide with the mountain-shaped rain return ribs (25) provided on the inner surface of the skirt section (16) of the hood (13) and the substrate (10). Drop it on top to prevent rainwater from entering the ventilation cylinder (12).

Further, the rain baffle (18) is provided on the outer surface (1) of the ventilation cylinder (12).
At the same time, it acts as a guide vane for the wind that directly collides with 7) and increases the negative pressure in the leeward gap (14) to help the natural exhaust from the ventilation tube (12).

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partial sectional perspective view showing an example of an attic ventilation tile according to the present invention, FIG. 2 is a front sectional view of the attic ventilation tile, and FIG.
FIG. 4 is a side sectional view of the attic ventilation tile, and FIG. 4 is a plan view of the attic ventilation tile.

In these figures, (10) is a mounting board made of cast aluminum with a roof tile (11) mounted on the roof of a house, and (12) is a roof for the mounting board (10). Is a rectangular cylindrical ventilation cylinder that is formed integrally with the mounting substrate (10) by vertically penetrating at an angle of intersection of the inclination angle (θ) and a substantially complementary angle (90 ° -θ). A hood (13) having a shape of a truncated pyramid without a bottom is covered in the upper opening (12a) of the ventilation cylinder (12) with a required gas passage gap (14), and the hood (13) The top surface is integrally fixed to the upper ends of the four stays (15a), (15b), (15c) and (15d) extending upward from the ventilation cylinder (12) by means such as argon welding. In addition, the hood (13) is usually the mounting board (1
0) and the ventilation tube (12) are made of the same aluminum casting, but if they are made of a synthetic resin material such as FRP (reinforced plastic), the weight can be further reduced.

The ventilation cylinder (12) is connected to the mounting board (10) so that the diagonal line of the ventilation cylinder is oriented in the direction of the roof inclination, so that the rainwater flows smoothly over the mounting board (10). In addition, the eaves-shaped rain return portion (18) is provided over the entire circumference of the outer surface (17) facing the inner surface (16a) of the skirt portion (16) formed vertically downward from the lower end of the hood (13). It is equipped as one. In addition, a mountain-shaped projection (19) is provided around the entire periphery of the upper end opening (12a) of the ventilation cylinder (12) to assist the draining action of the rain flap (18). .

Further, the ventilation cylinder (12) has a small axial fan (21) with a rotating shaft arranged vertically in a substantially central portion of the ventilation passage (20) inside the ventilation cylinder (12). ) The triangular shelf-like mounting plates (22) and (22) 'formed on the diagonal corners of the ventilation tube (12) have bolts (23) and (23)'.
It has been stopped.

On the other hand, in the hood (13), the downward eaves surface (24) formed at the upper end of the skirt portion (16) is gradually reduced in distance from the eaves side to the ridge side with the upper surface of the mounting substrate (10). On the contrary, the lower end of the skirt portion (16) is formed so that the space between the lower end of the skirt portion (16) and the upper surface of the mounting substrate (10) gradually widens as the lower end approaches the ridge side.

Further, the hood (13) has a mountain-shaped rib (25) all around the inner surface (16a) of the skirt (16) at a position slightly higher than the rain return (18) of the ventilation cylinder (12). Equipped.

In the figure, (26) and (26) 'are triangular shelf mounting seats for fixing roof tiles, which are integrally formed at diagonal corners near the lower opening (12b) of the ventilation cylinder (12).

The attic ventilation roof tile of the present invention has the above-mentioned structure. Next, the operation thereof will be described. First, when mounting on the roof, the roof tile (11) mounted on the roof.
One of the above is removed and a ventilation hole (28) of a required size is formed in the exposed part of the base plate (27), and the mounting board (10) of the ventilation cylinder (A) is attached to another roof tile (11). It is installed in combination with the ventilation hole (28), and a fixing rod (31) having a through hole (30) is attached to the lower surface of the hole (29) formed at the periphery of the ventilation hole (28). Mounting holes (32) formed in (26) and (26) ',
The ventilation tile (A) is fixed to the roof by inserting a series of bolts (33) into (32) 'and screwing a nut (34) at the tip.

(35) is a fixed frame placed around the ventilation hole (28) on the upper surface of the field plate (27), and (36) is rubber interposed between the fixed frame (35) and the ventilation cylinder (12). It is a sealing member made of a plate or the like.

Thus, the attic ventilation tile (A) attached to the sloping surface of the roof has a ventilation hole (2) due to the blowing action of the fan (21).
The air in the attic (37) is sucked from 8) and forcedly exhausted to the atmosphere through the gap (14) between the ventilation tube (12) and the hood (13).

When the wind collides with the inclined surface of the roof under strong wind, the hood (13) and the skirt (16) of the hood (13) first block the wind, and a large amount of air flows from the windward side to the gap (14). When the rainwater flowing on the substrate (10) is blown up by the wind, the rainwater that tries to rise along the outer surface (17) of the ventilation pipe (12) is blocked by the ventilation pipe (12). ), The rain baffle portion (18) protruding from the outer surface of the ventilation baffle (12) flows along the lower edge of the rain baffle portion (18) toward the leeward side of the ventilation pipe (12). Also, most of the raindrops splashed by the rain return section (18) collide with the chevron ribs (25) provided on the inner surface (16a) of the skirt section (16) of the hood (13), and then onto the substrate (10). Drop it.

Furthermore, in a normal breeze condition of about 1 to 2 m, the skirt (16) of the hood (13) and the outer surface (1) of the ventilation tube (12)
The wind hitting the windward side of 7), the eaves face (2) of the hood (13).
4) It goes around between the board (10) and the substrate (10) toward the leeward side of the ventilation cylinder (12), that is, toward the ridge, and accelerates the flow velocity to increase the negative pressure in the gap (14) in that part, and the windward side. That is, since an appropriate amount of air flows into the gap (14) on the eaves side, the air staying inside the hood (13) is naturally scavenged by the force of the wind.

In the case of performing natural scavenging of the hood (13), the shape of the gap (14) formed between the ventilation tube (12) and the hood (13) is an important point.

That is, in the case of the illustrated embodiment, the ventilation cylinder (12) and the hood (13) are both square in cross section as shown in FIG.
Moreover, since the straight wall portions on the inner surface of the hood (13) are close to the corners of the ventilation tube (12) at the center, the gap (1
In 4), the wide passage portion (14a) and the narrow passage portion (14b) are alternately arranged at equal angles. Therefore, the air flowing into the gap (14) from the windward side rises in the hood (13) while being squeezed by the narrow portion (14b), crosses the upper opening (12a) of the ventilation tube (12), and leeward. It flows out from the side gap (14).

As described above, the gap (14) is formed by alternately setting the wide passage portion (14a) and the narrow passage portion (14b) by appropriately setting the outer surface shape of the ventilation cylinder (12) and the inner surface shape of the hood (13). It is necessary to form a rectangular ventilation tube (12) as shown in Fig. 5 (b).
A circular tubular hood (13) is arranged on the outer circumference of the, or conversely, a rectangular tubular hood is attached to the outer circumference of the round tubular ventilation tube (12) as shown in FIG. As shown in FIG. 5 (d), it is possible to attach the deformed tubular hood (13) to the round tubular ventilation tube (12).

In the above embodiment, the case where the mounting substrate (10) is formed in the same shape as one roof tile (11) and the ventilation cylinder (12) is integrally formed in the center thereof has been described. The form of the mounting substrate (10) in the attic ventilation roof is not particularly limited to this, and, for example, two of the mounting substrates (10) are adjacent to each other in the inclination direction, two are adjacent to each other in the lateral direction, or are adjacent to each other. It is also possible to have a shape in which a plurality of roof tiles such as four are arranged in series, and the ventilation cylinder (12) is erected at approximately the center thereof.

(Effects of the Invention) As described above, the attic ventilation roof tile of the present invention is formed by integrally forming a tubular ventilation pipe that vertically penetrates the roof tile-shaped mounting substrate at approximately the center thereof. The upper end of the hood is covered with a hood having a cylindrical shape with a cover so as to allow a gas to pass therethrough, and the inner surface of the hood and the outer surface of the ventilation cylinder facing the inner surface are positioned so that the former is located above and the latter is located below. As the mountain-shaped rain return rib and the eaves-shaped rain return section are projected over the entire circumference, the rain return section can be used even when strong wind hits the backside ventilation tiles during rainfall. Even if raindrops bounce off the rain baffle, the mountain-shaped rain baffle ribs project above the rain baffle. Collides with the rain return ribs and drops onto the substrate, making sure that rainwater enters In addition to being able to prevent the above, it is possible to increase the negative pressure of the gas passage gap on the leeward side by the air flow guiding function of the rain return portion, and to exert an excellent effect of promoting natural exhaust inside the hood.

Moreover, according to the present invention, the rainwater flowing on the substrate can be prevented from entering only by providing the rain return part near the lower end of the ventilation tube and the rain return rib at the lower part of the hood, so that the height of the exhaust tube and the hood is increased. The ventilation tiles can be made compact without having to increase the size, and the rain ribs on the inner surface of the hood skirt are chevron-shaped to ensure reinforcement of the hood and prevention of raindrop retention on the inner surface of the hood. Since it is not necessary to incorporate a special rainwater intrusion prevention mechanism such as a damper into the product, it is possible to suppress a large rise in the product price, and there is no need for particularly troublesome operation during use, and maintenance is not required. It can be expected to be effective.

[Brief description of drawings]

FIG. 1 is a partial sectional perspective view showing an example of an attic ventilation tile according to the present invention, FIG. 2 is a front sectional view of the attic ventilation tile, and FIG.
The figure is a side sectional view of the attic ventilation tile, Fig. 4 is a plan view of the attic ventilation tile, and Figs. 5 (a) to (d) are explanatory views showing the relationship between the ventilation tube and the hood. The figure is a side sectional view of a conventional ventilation roof tile. (10) …… Mounting board, (12) …… Ventilation cylinder, (13) …… Hood, (14) …… Gas passage gap, (16a) …… Inner surface, (1
7) …… Ventilation cylinder outer surface, (18) …… Rain wrap, (25) ……
Ribbar for rain, (37) …… Attic, (A) …… Ventilation roof tile.

Claims (5)

[Claims] Claim: What is claimed is: 1. A ventilating cylinder, which vertically penetrates the substrate, is integrally formed at approximately the center of a roof-shaped mounting substrate, and a predetermined gap is provided at the upper end of the venting cylinder so that gas can pass therethrough. Cover with a lid-shaped tubular hood, bend the lower end of the hood inward, and form a skirt portion that extends vertically downward at its tip,
Yamagata rain ribs (2
5) projectingly, while an eaves-like rain catching portion is formed projectingly over the entire circumference at a position slightly lower than the facing position of the rain catching rib on the outer surface (17) of the ventilation cylinder. Attic ventilation tiles. 2. A gas passage gap formed between the outer surface of the ventilation tube and the inner surface of the hood alternates between a narrow passage width portion and a wide passage width portion around the ventilation cylinder at equal angles. The attic ventilation roof tile according to claim 1, which has. 3. An outer surface of the ventilation tube and an inner surface of the hood each have a rectangular tube shape, and the inner surface of the hood is close to the corner of the ventilation tube at the center of each wall surface. The attic ventilation tile described in paragraph 2. 4. The attic ventilation roof tile according to any one of claims 1, 2 and 3, wherein the mounting base has a Japanese roof tile shape. 5. The attic ventilation roof tile according to any one of claims 1, 2, or 3, wherein the mounting base has a flat roof tile shape.