JPH0734624A - Ventilation device of roof - Google Patents

Abstract

PURPOSE:To improve waterproofness to strong wind and rain and a snowstorm by forming a projection for holding down the wind speed of air which enters the inner surface of a ventilation passage from the outdoor side. CONSTITUTION:A ventilation passage 14 is formed between a base 12 angled like a mountain and a cover 13, and the passages are connected to each other by many connecting plates 26. An elongated air hole 15 for forcing the indoor air to flow in the ventilation passage 14 is formed on the top of the base 12. Further, projections 17 for holding down the wind speed are projected on the top surfaces of right and left inclined plates 16, 16. Subsequently, a drip 19 is fixed to the central part of the upper surface of the inclined plate 16 along the longitudinal direction. The projection 17 is formed also on the drip 19. Shielding plates 23 for preventing entering of rainwater are angled at both end parts of right and left inclined plates 22. Thus, waterproofness of a ventilation roof can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof ventilation device for indoor ventilation.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional example of a ventilation device installed in a flat ridge such as a dormitory roof. This ventilation device has a base 42 having a mountain-shaped cross section with a ventilation hole 41 formed in the center.
And a cover 44 having a mountain-shaped cross section fixed above the base 42 at a predetermined interval to form a ventilation passage 43 between the base 42 and the base 42. In order to prevent rainwater from entering the ventilation passages 43 when the rainwater enters the ventilation passages 43, a drainer 46 having a U-shaped cross-section with rising pieces 45 on both sides is provided.

Further, the ventilator is constructed so that the base 42 covers an opening 47 formed along the longitudinal direction of the flat ridge.
Both ends of the base 42 are angle members 48 on both sides of the opening 47
It is fixed to the roof with screws. Therefore, as shown in the left half of the figure, the indoor air flows from the opening 47 of the roof through the ventilation hole 41 into the ventilation passage 43, and is exhausted to the outside through the ventilation passage 43 and the exhaust ports 49 on both sides. It

[0004]

However, in the above-mentioned conventional technique, since the rising piece 45 of the drainer 46 is only fixed so as to project into the ventilation passage 43, as shown in the right half of the figure. During strong wind, rain, or snowstorm, rainwater or snow enters the ventilation passage 43 from the exhaust port 49 together with the strong wind, and reaches the ventilation hole 41 so as to meander the drainer 46 portion in the ventilation passage 43, and from the roof opening 47. There were cases where it entered the room.

In view of such circumstances, an object of the present invention is to provide a ventilation accessory capable of improving the waterproof property in the case of strong wind and rain or snowstorm.

[0006]

[Means for Solving the Problems] To achieve the above object,
Technical means taken by the present invention is, in a roof ventilation device provided with a ventilation passage for ventilating indoors, a large number of protrusions are formed on the inner surface of the ventilation passage to suppress the wind speed of air entering from the outdoor side. There is a point.

[0007]

[Operation] The ventilation passage ventilates indoors when the wind is weak. On the other hand, during strong wind and rain or snowstorm, when rainwater or snow enters the ventilation passage together with strong wind from the outside, when the strong wind passes through the protrusion provided on the inner surface of the ventilation passage, a vortex is generated behind the protrusion. As a result, the wind speed of the air is suppressed, and the intrusion of rainwater is suppressed.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 and 2 show a first embodiment of a ventilator according to the present invention. The ventilator of this embodiment is installed on a flat ridge such as a dormitory roof. In FIG. 1, on the upper surface of the rafter 2 which is erected on both sides of the purlin 1, a field board 4 is supported with the ridge side set aside so that an opening 3 having a predetermined length is formed in the longitudinal direction of the flat ridge. The roof tile 6 is raised on the upper surface of the base plate 4 through a waterproof sheet 5 made of asphalt roofing or the like.

A drainer 7 and an additional waterproof sheet 8 are interposed between the roof plate 6 and the roof plate 6 on the side of the opening 3 and the ventilation device is fixed on the upper surface of the roof tile 6. The angle member 9 is fixed with a screw. This angle member 9 is formed in an L-shape from a fixed plate portion 10 fixed to the roof and a rising plate portion 11 standing upright at the end of the fixed plate portion 10.

As shown in FIG. 2, the ventilation device has a base 12 and a cover 13, which are formed by bending a strip-shaped thin-walled sheet metal member into a mountain shape at a center portion in the width direction, which is substantially equal to the slope of the roof.
The base 12 and the cover 13 are connected by a number of connecting plates 26 at predetermined intervals in the longitudinal direction so that a ventilation passage 14 is formed between them. A large number of elongated ventilation holes 15 are formed on the top of the base 12 along the longitudinal direction to allow indoor air to flow into the ventilation passage 14. And
Embossed on the upper surfaces of the left and right inclined plates 16, 16 forming a mountain shape so that semi-circular projections 17 for suppressing the wind speed of air that has entered the ventilation passage 14 from the outdoor side project upward. And so on.

At the center of the upper surface of the inclined plates 16 and 16 in the roof flow direction, a drainer 19 having a U-shaped cross section is fixed along the lengthwise direction and has riser pieces 18 at both ends.
Also, a large number of protrusions 17 are formed. Further, a mounting plate portion 20 bent downward at a right angle is formed at a lower end of each inclined plate 16, 16 and a hem plate portion 21 bent at a right angle along the roof surface is formed at a lower end of the mounting plate portion 20. Are formed.

On the other hand, a shield plate 23 for preventing rainwater and the like from easily entering the ventilation passage 14 is provided at both ends of the left and right inclined plates 22, 22 forming the mountain shape of the cover 13.
Is bent downward at a right angle, and a bent piece 24 bent inward is formed at the lower end of the shielding plate 23, and the space between the lower end of the shielding plate 23 and the hem plate portion 21 of the base 12 is formed. It is used as the exhaust port 25.

A large number of semi-circular projections 17 are formed on the inner surface of the cover 13 so as to project inwardly like the base 12. The drains 19 having a U-shaped cross section are formed on the inner surfaces of the inclined plates 22, 22. Two of them are fixed along the longitudinal direction at predetermined intervals in the roof flow direction, and a large number of protrusions 17 are also formed on this drainer 19. The connecting plate 26 is formed by bending a strip-shaped thin-walled sheet metal member into an L-shape, and one end of the connecting plate 26 is attached to the mounting plate portion 20 of the base 12 and the other end is sandwiched between the inclined plates 22 and 22 of the cover 13 to sandwich the drainer 19. Are nailed in each.

To install the ventilation device, first, the opening 3
The roofs are covered with the extension waterproof sheets 8 on both sides so as to cover the angle members 9, respectively, and the mounting plate portion 20 of the base 12 is applied to the rising plate portion 11 of the angle member 9 via the extension waterproof sheets 8. After contacting and screwing the connecting plates 26 to the mounting plate portion 20 of the base 12, the connecting plate 2
This is done by covering the upper part of 6 with a cover 13 and fastening it with a nail.

In order to improve waterproofness, 27 is
It is an auxiliary waterproof sheet interposed between the angle member 9 and the roof surface corresponding to the nailed portion of the angle member 9. According to the ventilation device having the above-described configuration, as shown in the left half of FIG. 1, indoor air flows from the roof opening 3 to the ventilation hole 15 of the base 12.
Through the exhaust passage 25 to the outside through the exhaust passage 25.

In addition, even when rainwater splashes from the exhaust port 25 into the ventilation passage 14 by hitting the roof during normal rainy weather, the rainwater is blocked by the drainer 19 provided in the ventilation passage 14 so that the rainwater reaches the ventilation hole 15. There is no intrusion. Further, as shown in the right half of FIG. 1, even when rainwater enters the ventilation passage 14 together with the strong wind from the exhaust port 25 during strong wind and rain or snowstorm, the strong wind passes through the protrusion 17 in the ventilation passage 14. At this time, a vortex is generated behind the protrusion 17 and the wind speed of the air is suppressed, so that the rainwater does not meander through the drainer 19 portion, but collides with the drainer 19 or the protrusion 17 and the flow of rainwater is suppressed. Therefore, it is possible to prevent rainwater and the like from entering the room, and to improve waterproofness.

FIGS. 3 and 4 show a second embodiment of the present invention,
The ventilator of this embodiment is installed on the top of a rectangular roof. This ventilation device is composed of a base 12A having a ventilation hole 15 in the center, and a cover 13 that covers the base 12A and forms a ventilation passage 14 between the base 12A and the base 12A.

The base 12A is provided with a square cylindrical base portion 30 having the vent hole 15 inside, and a mounting plate portion protruding downward to the outside at an angle substantially equal to the slope of the roof on the outer periphery of the lower end of the base portion 30. 31 is formed. Further, a flange portion 32 protruding outward is formed on the outer periphery of the upper end of the base portion 30,
A protruding plate portion 33 that horizontally protrudes in the middle of the outer periphery of the base portion 30.
Are formed. The cover 1 is attached to the tip of the protruding plate 33.
A fixing plate portion 34 for fixing 3 is bent outward and downward.

A large number of openings serving as the exhaust ports 25 of the ventilation passage 14 are formed in the fixed plate portion 34 along the circumferential direction of the base 30, and a wire net 35 for insect repellent is attached to the exhaust ports 25. On the other hand, the upper portion of the cover 13 has a quadrangular pyramid shape, and the side wall 36 is formed on the outer periphery of the lower end thereof. An inclined portion 37 bent downward inward is formed at the lower end of the side wall 36, and the fixing plate portion 34 of the base 12A is joined to the middle portion of the inclined portion 37. Further, a protrusion plate portion 38 that protrudes between the flange portion 32 of the base 12A and the protrusion plate portion 33 is formed in the middle of the side wall 36, and the flange portion 32, the protrusion plate portion 33, and the protrusion plate portion. The ventilation passage 14 is formed to meander by 38.

On the inner surface of the ventilation passage 14, there is attached a wind speed suppressing member 39 having a large number of projections 17 formed on the surface for suppressing the wind speed of the air that has entered the ventilation passage 14 from the exhaust port 25. The wind speed suppressing member 39 is made of synthetic resin in a sponge shape, and is attached according to the shape inside the ventilation passage 14. A rectangular opening 3 is formed at the top of the roof.

In the second embodiment, in addition to the effects of the first embodiment, since the wind speed suppressing member 39 has a sponge shape, it is possible to absorb rainwater or the like that has entered through the exhaust port 25 and is waterproof. Improvements are being made. The present invention is not limited to the above embodiment, but the cover 13
Also, the bases 12 and 12A can be formed of an embossed material having a large number of protrusions 17.

Further, the shape of the protrusion 17 is not limited to the semicircular shape shown in each of the above-mentioned embodiments, but may be constituted by a cut-and-raised piece as shown in FIG. 5A, for example. It may have a quadrangular shape shown in b) or a triangular shape shown in FIG.

[0023]

According to the present invention, in the case of strong wind and rain or snowstorm,
Even if rainwater or snow enters the ventilation passage together with strong wind from the outdoor side, the wind speed of the air is suppressed by the large number of protrusions formed in the ventilation passage, so the flow of rainwater etc. is suppressed and rainwater etc. Intrusion can be prevented and the waterproofness of the ventilation roof can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention, in which the left half is in a ventilated state and the right half is in a windy and rainy state.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a vertical cross-sectional view showing a second embodiment of the present invention, in which the left half is in a ventilated state and the right half is in a windy and rainy state.

FIG. 4 is an external perspective view of FIG.

FIG. 5 is a cross-sectional view showing a modified example of the protrusion.

FIG. 6 is a vertical sectional view showing a conventional example.

[Explanation of symbols]

 14 Ventilation passage 17 Protrusion

Claims (1)

[Claims] 1. A ventilation device for a roof having a ventilation passage for ventilating indoors, characterized in that a large number of protrusions are formed on the inner surface of the ventilation passage for suppressing the wind speed of air entering from the outside. Roof ventilation system.