JP3396731B2 - Ridge ventilation system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ridge ventilation device capable of discharging the air in an attic space to the outside.

[0002]

2. Description of the Related Art The air heated in each room of a house rises because it is light and gathers in the space behind the hut. Therefore, the space behind the hut becomes hot and humid, and dew condensation is likely to cause wood to rot and termites.

For this reason, in recent years, a house ventilation device is often provided in houses to discharge the air in the attic space to the outside.

FIG. 5 shows a conventional structure of a ridge ventilation device 10P. In FIG. 5, 1 is a roof and 11 is a ridge ventilation device 10P.
It is a cover that constitutes.

At the top of the roof 1, there is formed an opening 2 for discharging the warm and moist air (AR) collected in the attic space 5 to the outside.

The cover 11 serves to cover the opening 2 from above and prevent rain and wind from entering the attic space 5 through the opening 2, and the upper surface 12 and the side surface (1).
3A, 13B).

Between the lower ends of the side surfaces (13A, 13B) of the cover 11 and the roof surface 1a, gaps (lower ventilation openings 4) are formed, respectively, and pass through the opening 2 from the attic space 5. The air flowing into the inner space 15 of the cover 11 flows through the space 15 and is discharged from the lower ventilation port 4 to the outside.

[0008]

By the way, in the ridge ventilation device 10P, the opening area of the lower ventilation port 4 tends to be enlarged in order to increase the ventilation efficiency of the attic space 5.
However, when the lower ventilation opening 4 is widened, when it rains in a strong wind, wind and rain in the blowing direction or the lateral strike direction flows from the ventilation opening 4 and blows into the attic space 5 through the opening 2. It is easy for the situation to occur.

Therefore, a ridge ventilator for preventing the occurrence of the above situation has been conventionally proposed.

For example, a ridge ventilation device 10Q disclosed in Japanese Patent Laid-Open No. 2000-27392 has a cover 1 as shown in FIG.
Upper surface portion 1 near the upper end portion of the side surface portion (13A, 13B) 1
The upper ventilation opening 14 that opens on the second side is provided (the invention of claim 1 of the above publication). Note that FIG.
Then, only one upper ventilation port 14 is shown.

With such a structure, in the case of wind and rain in the blowing direction and the lateral striking direction, in addition to the one blown into the cover 11 from the lower ventilation port 4 (WR2), the side surface portion 13 of the cover 11 is provided.
A flow that collides with the outer surface of A and rapidly separates upward from the upper end corner of the side surface portion 13A [high-speed separation flow (WR1)]
Occurs. This high-speed separated flow (WR1) is
It is assumed that the wind and rain (WR2) blown into the cover 11 is sucked to the outside through the upper ventilation port 14 in order to generate a negative pressure (suction action) with respect to 4.

However, since the upper ventilation opening 14 is formed on the side of the upper surface 12 near the upper end of the side surface portion 13A of the cover 11, the negative pressure to the ventilation opening 14 due to the high-speed separated flow WR1 easily fluctuates, Sometimes it becomes positive pressure. When such a situation occurs, the suction action does not work in the upper ventilation port 14, and the wind and rain (WR) rising in the cover 11
2) will be pushed back down. Then, this pushing back action may cause wind and rain (WR2) to be blown into the attic space 5. Also, the upper ventilation port 14
There is a risk that the wind and rain will blow directly onto the space and enter the attic space 5.

It should be noted that the opening area of the upper ventilation opening 14 needs to be made large to some extent in order to fully exert the suction action. However, when the ventilation opening 14 is widened, it will pass through the ventilation opening 14 and wind and rain will enter the attic. The probability of blowing into the space 5 is increased.

Here, in the above-mentioned Japanese Patent Laid-Open No. 2000-27392, as shown in FIG.
There is disclosed a technique for preventing wind and rain from blowing into the attic space 5 by providing 6 or a meandering portion 17 (the inventions of claims 2 and 3 of the above-mentioned publication).

However, in order to reliably prevent the above-mentioned wind and rain from being blown into the attic space 5, the windproof wall 16 and the hanging wall 18 and the standing wall 19 forming the vertical meandering portion 17 are made large. It is necessary, but if so, the flow resistance of the air (AR) from the attic space 5 increases, and it becomes impossible to ventilate efficiently, which is a fatal inconvenience.

Further, in the ridge ventilation device, in order to suppress the momentum of the fire when a fire occurs, when the overheated state is reached, the fuse member is blown to reduce the bearing capacity of the part that keeps the air discharge passage in communication. There is a built-in fire-stop mechanism that shuts off the discharge path by eliminating it.
It has a drawback that the structure is complicated and the workability is poor (Japanese Patent Application Laid-Open No. 8-1
No. 58567).

It is an object of the present invention to provide a ridge ventilation system which can prevent wind and rain from blowing into the attic space even when exposed to wind and rain in the blowing direction or the lateral strike direction without lowering the ventilation efficiency. . Another object of the present invention is to provide a ridge ventilator with a simple structure that can block the air discharge passage in the cover and suppress the momentum of the fire when a fire occurs.

[0018]

According to the present invention, there is provided a cover which covers an opening formed at the top of a roof from above and has an upper surface portion and a side surface portion, and which passes through the opening portion from the attic space. In the ridge ventilation device formed so that the air flowing into the inner space of the cover flows in the space and is discharged to the outside from the lower ventilation port formed between the side surface portion and the roof surface. An upper ventilation opening is provided on the upper surface of the cover, and an air guiding path that connects the lower ventilation opening and the upper ventilation opening along the inner surface of the cover is formed in the inner space of the cover, and the opening is covered from above. A cover plate is provided that can prevent wind and rain that has passed through the upper ventilation opening from flowing into the attic space through the opening, and covers the air that has passed from the attic space through the opening and into the inner space of the cover. First air exhaust for guiding towards the plate The upright wall to form a tract provided, first
A guide wall that forms a second air discharge path that guides the air that has passed through the air discharge path to the merging portion with the air guiding path, is provided in the air guiding path portion below the merging portion. , It is possible to prevent wind and rain from flowing from the lower ventilation port to the air guide passage and trying to rise to flow toward the second air discharge passage, and to return to the lower ventilation port side, and the descending air to the lower ventilation port. A return guide member for guiding toward the opening is provided, and a shield plate is provided on the inner surface of the cover plate, the shield plate protruding toward the opening and having a lower end thereof located below the second air discharge passage.

In the invention of such a structure, when exposed to wind and rain in a blowing direction or a lateral striking direction, apart from blowing the air into the air guide passage in the cover from the lower ventilation port, it is possible to move at high speed along the upper surface of the cover. A flowing air stream is created. This high-speed air flow causes a negative pressure (suction action) to the upper ventilation port, so that the wind and rain blown into the air guiding path is sucked out through the upper ventilation port.

Here, unlike the conventional example (Japanese Unexamined Patent Publication No. 2000-27392) in which the upper ventilation opening has to be formed in a very limited and narrow area on the upper surface side near the upper end of the side surface of the cover, In the present invention, the formation location and the opening area of the upper ventilation port can be freely set so that the suction action works most effectively. Therefore, the wind and rain blown into the air guide path can be effectively sucked out through the upper ventilation port.

Further, even if the wind and rain blown into the air guide passage of the cover tries to flow toward the second air discharge passage, it is blocked by the return guide member and returned to the lower ventilation port.
Therefore, the force of the wind and rain flowing is greatly reduced, and the wind and rain rises with the air guiding path deenergized and is efficiently sucked out from the upper ventilation port. Even if the wind and rain rising in the air guide passage tries to flow to the second air discharge passage due to fluctuations in air pressure or the like at the merging portion, the inflow is blocked because the back pressure is applied by the shielding member.

Further, even if wind and rain blows directly onto the upper ventilation port, the wind and rain that has passed through the ventilation port is received by the cover plate, so it is not possible to blow it into the attic space through the opening. Absent.

On the other hand, ventilation of the attic space is also efficiently performed. That is, the air that has passed through the opening from the attic space and flowed into the first air discharge path is flowed into the air guide path through the second air discharge path. At this time, since the first and second air discharge passages are not provided with a vertically meandering portion or the like which obstructs the air flow unlike the conventional example (Japanese Patent Laid-Open No. 2000-27392), it receives almost flow resistance. Instead, it is flowed into the air guide path.

The air that has flowed into the air guide path rises along with the wind and rain rising in the guide path, and is discharged to the outside from the upper ventilation port. At this time, since the return guide member is provided below the confluence portion of the second air discharge passage and the air guide passage, it does not serve as a resistance against the air. From the above, the air in the attic space is efficiently exhausted to the outside through the upper ventilation port.

Since the lower ventilation port is also in a negative pressure state on the leeward side, part of the air introduced into the air guide path descends toward the lower ventilation port. Guide the air to the lower ventilation opening. Therefore, also from this point, the air in the attic space can be efficiently discharged to the outside.

A second aspect of the present invention is a ridge ventilator in which the upper surface of the cover is formed in a flat shape, and the upper ventilation opening is formed from a large number of holes penetratingly formed in the upper surface over a wide area.

In the invention of such a structure, when exposed to wind and rain in the blowing direction and the lateral striking direction, a high-speed air flow with little pressure fluctuation is generated along the upper surface of the cover. Moreover, since the total opening area of each hole forming the upper ventilation port can be increased, the wind and rain blown into the air guide passage of the cover can be more effectively sucked out from the upper ventilation port. In addition, the air that has flowed into the air guide passage from the attic space through the opening, the first and second air discharge passages can be more effectively sucked out from the upper ventilation opening. Therefore, it is possible to more reliably prevent wind and rain from blowing into the attic space without reducing ventilation efficiency.

According to a third aspect of the present invention, there is provided a ridge ventilation device in which the cover plate is formed so that its cross-sectional shape becomes a mountain shape.

In the case of the invention having such a structure, the rainwater that has passed through the upper ventilation port and dropped on the cover plate can be quickly discharged to the outside through the air guiding path and the lower ventilation port without accumulating. Therefore, it is possible to more reliably prevent wind and rain from blowing into the attic space without reducing ventilation efficiency.

According to a fourth aspect of the present invention, the side end of the cover plate is
It is a ridge ventilation device that has a shape that jumps upward.

In the invention of such a structure, when the wind and rain rising in the air guide path hits the side end of the cover plate for some reason, the side end jumps upward, so the wind and rain are directed toward the air guide path. Will be returned. Further, since the side end portion of the cover plate that forms the second air discharge passage in cooperation with the guide wall is flipped upward, the opening area of the outlet side portion (merging side portion) of the air discharge passage is large. Become. As a result, the air from the second air exhaust passage flows into the air guide passage without further resistance. Therefore, it is possible to more reliably prevent wind and rain from blowing into the attic space without reducing ventilation efficiency.

According to a fifth aspect of the present invention, there is provided a ridge ventilation device in which a ridge is provided on an inner surface of a side end of the cover plate.

In the case of the invention having such a structure, even if raindrops that have fallen on the outer surface of the cover plate through the upper ventilation opening or the like reach the inner surface of the cover plate, the raindrops can be overcome and the second air discharged. It cannot fall into the road and falls downward. Therefore, raindrops can be more reliably prevented from blowing into the attic space without reducing ventilation efficiency.

A sixth aspect of the present invention is the ridge ventilation apparatus in which the return guide member is provided with a plurality of weather return members.

In the case of the invention of such a structure, even if the wind and rain flowing into the air guide passage tries to flow toward the second air discharge passage, it is blocked by the plurality of wind and rain return portions of the return guide member and returned to the lower ventilation port. . Therefore, it is possible to more effectively prevent wind and rain from blowing into the attic space without reducing ventilation efficiency.

According to a seventh aspect of the present invention, the first shield is provided in the vicinity of the shield plate so as to be swingable via a support shaft, and is brought into contact with the standby position along the shield plate and the upper end portion of the upright wall. A fire stop plate that can be positioned at a closed position that shuts off the air discharge path and the second air discharge path, and is bent and deformed when the temperature exceeds a preset temperature to swing the fire stop plate from the standby position to close it. It is a ridge ventilation device equipped with a fire stop mechanism composed of a bimetal that can be positioned and held in position.

In the case of the invention of such a construction, when the bimetal becomes higher than the set temperature during a fire, the bimetal bends and swings the fire stop plate from the standby position to position and hold it in the closed position. As a result, the first air discharge passage, which is in direct communication with the opening, is blocked from the second air discharge passage. Therefore, it is possible to suppress the momentum of the fire with a simple structure by shutting off the air discharge passage in the cover when a fire occurs.

[0038]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the ridge ventilation device 10 according to the present invention has an upper ventilation port 14 provided on an upper surface 12 of a cover 11, and an inner space 15 of the cover 11 having a lower ventilation port 4 and The first for guiding the warm and moist air (AR) flowing from the attic space 5 toward the cover plate 31 by forming the air guide path 21 communicating with the upper ventilation port 14 and providing the cover plate 31. Second air discharge for guiding the air (AR) passing through the first air discharge passage 41 to the confluence portion 22 with the air guide passage 21 by providing standing walls (42A, 42B) forming the air discharge passage 41 of A guide wall (52A, 52B) that forms the passage 51 in cooperation with the cover plate 31 is provided, and the merging portion 2
A portion of the air guide path 21 below 2 is blown from the lower ventilation port 4 and tries to rise in the air guide path 21 (W / W).
The air (AR) capable of returning R2) to the lower ventilation port 4 side and descending (AR) is provided with a return guide member 61 that guides it toward the lower ventilation port 4, and a shielding plate 71 that projects downward on the inner surface of the cover plate 31. It is configured to be provided.

The ventilation opening / closing device is not shown in FIGS. 1 to 4.

Specifically, the upper surface portion 12 of the cover 11 (specifically, the central portion 12m in FIG. 1) is formed in a planar shape. In this embodiment, the central portion 12m is
It is formed of a planar punching metal plate 12p.

A large number of holes 12 are formed in a wide area on the central portion 12m (punching metal plate 12p) of the cover 11.
h is perforated. The upper ventilation port 14 is formed by these holes 12h. Here, the formation location and the number of each hole 12h are such that the wind and rain inside the cover 11 by the high-speed airflow (WR1) flowing along the upper surface portion 12 of the cover 11 when exposed to the wind and rain in the blowing direction and the lateral strike direction. (WR2) and air (AR) are selected so as to form a negative pressure that can reliably be sucked.

Each hole 1 of the punching metal plate 12p
2 h is formed so that dead leaves and small birds do not enter the cover 11. In addition, the longitudinal direction of the cover 11 (see FIG.
In the direction orthogonal to the paper surface (in the direction of the arrow X in FIG. 2), both ends are covered by the side panel 8.

The inner surface 11a of the cover 11 forming the air guide path 21 is formed of a smooth curved surface so that air resistance is reduced.

The cover plate 31 covers the opening 2 formed at the top of the roof 1 from above, and the wind and rain that has passed through the upper ventilation port 14 will enter the attic space 5 through the opening 2. It is formed so that it can be prevented. In this embodiment, the cover plate 31 is formed symmetrically with respect to the vertical axis of the opening 2.

In this embodiment, the cover plate 31 is formed so that its cross section has a mountain shape. Further, the left and right side end portions 34 of the cover plate 31 in FIG. 1 are each shaped so as to jump upward. In addition, a protrusion 36 is provided on the inner surface of each side end 34 of the cover plate 31. The ridge portion 36 extends in the longitudinal direction of the cover plate 31 (the direction orthogonal to the paper surface in FIG. 1) and also serves as a fixing portion for fixing the side panel 8 with a screw.

The upright walls (42A, 42B) are arranged opposite to each other along both longitudinal end portions of the opening 2, and define the first air discharge passage 41. This standing wall (42
A variable fixing plate 45 for mounting the main building ventilation device 10 to the roof 1 is rotatably connected to the lower end of the roof surface 1a (A, 42B).

The standing walls (42A, 42B) also serve as a wind and rain wall for preventing wind and rain (WR2) blown from the lower ventilation port 4 from entering the attic space 5 through the opening 2. It is a thing. These standing walls (42A, 4
On the outer surface of 2B), a weather-weather return portion 43 is formed to prevent wind and rain (WR2) blown from the lower ventilation port 4 from rising along the outer surface.

The guide walls (52A, 52B) are covered with the cover plate 31.
The second air discharge path 51 is defined in cooperation with, and is formed integrally with the upper ends of the upright walls (42A, 42B) in this embodiment. In order to prevent small insects such as mosquitoes from entering the second air discharge path 51, the free side end portion 53 of the guide wall (52A, 52B) in this embodiment.
A mesh insect repellent net 55 is attached between the side end portion 34 of the cover plate 31 and the cover plate 31.

The return guide member 61 can return wind and rain (WR2), which is blown into the air guide passage 21 from the lower ventilation port 4 to the portion of the air guide passage 21 below the confluence portion 22 and tries to rise to the lower ventilation port 4 side. The descending air (AR) is formed so as to be guided to the lower ventilation port 4.

The return guide member 61 is provided with a plurality of weather return sections (62, 63). Each of the weather return parts (62, 63) is curved so that its cross-sectional shape is concave toward the lower side. Return guide member 61
The distance from the inner surface 11a of the cover 11 is selected so that small animals (such as mice) do not enter the air guide path 21.

The shield plate 71 is provided on the inner surface of the cover plate 31 so as to project toward the opening 2 and the lower end portion 72 thereof is located below the second air discharge passage 51. In this embodiment, the shield plate 71 is integrally provided in the central portion of the inner surface of the cover plate 31, as shown in FIG.

The shielding plate 71 forms a back pressure when the wind and rain are blown, and the air discharge paths (51, 5) on the left and right in FIG.
1) It prevents the passage of wind and rain (WR2) into the attic space 5 through the second air discharge passage 51 by blocking the passage. Further, the shielding plate 71 is the cover plate 31.
Also increases the section modulus of (1) to prevent bending in the longitudinal direction (direction orthogonal to the paper surface in FIG. 1).

In this embodiment, the purlin has the opening 2
It is formed of purlin constituent elements (7A, 7B) arranged in parallel in a direction orthogonal to the paper surface of FIG. As a result, the air (AR) passing through the opening 2 is not blocked by the purlins, and the attic space 5 can be ventilated more smoothly.

In the ridge ventilation device 10 according to the present invention,
A fire stop mechanism 80 is provided so that the air exhaust passages (41, 51) in the cover 11 can be blocked with a simple structure to suppress the momentum of the fire.

The fire stop mechanism 80 includes the shield plate 7
1 is provided so as to be swingable via a support shaft 82 in the vicinity of 1, and a standby position along the shield plate 71 and standing walls (42A, 42A).
B) a fire stop plate 81 that can be positioned in a closed position where it abuts on the upper end portion (locking portion 44) and shuts off the first air discharge passage 41 and the second air discharge passage 51; If it becomes, it will be deformed and fire stop plate 81
And a bimetal 85 that can be positioned and held in the closed position by swinging from the standby position. Here, FIG.
, The bimetal 85 is formed into a leaf spring shape,
You may attach so that it may engage with the base end part of the fire stop plate 81.

Next, the operation of this embodiment will be described.

When the main building ventilation device 10 is exposed to the wind and rain in the blowing direction and the sideward striking direction, in addition to the one blowing into the air guide passage 21 in the cover 11 from the lower ventilation port 4 (WR2), the cover 11 An air flow (WR1) flowing at high speed is generated along the upper surface portion 12. This high-speed air flow (WR1)
Causes a negative pressure (suction action) to the upper ventilation port 14, and therefore wind and rain (WR2) blown into the air guide path 21.
Is sucked out through the upper ventilation port 14.

Here, since the cover upper surface portion 12 is formed in a flat shape, a high-speed air flow with little pressure fluctuation is generated along the upper surface portion 12. In addition, each hole 12h forming the upper ventilation port 14 is formed in
Since it is formed over a wide area and the total opening area is sufficiently large, the wind and rain (WR2) blown into the air guide path 21 of the cover 11 can be more effectively sucked out. In addition, the air guide path 2 is passed from the attic space 5 through the opening 2, the first and second air discharge paths (41, 51).
The air flowing into 1 can be more effectively sucked out from the upper ventilation opening 14.

Even if the wind and rain (WR2) blown into the air guide passage 21 of the cover 11 tries to flow toward the second air discharge passage 51, the wind and rain return portions (62, 63) of the return guide member 61 cause It is blocked and returned to the lower ventilation port 4. Therefore, the wind and rain (WR2) is greatly reduced in momentum, rises in a state where the air guiding path 21 is deenergized, and is efficiently sucked out from the upper ventilation port 14.

Note that the wind and rain (W
R2) tries to flow into the second air discharge path 51 due to fluctuations in the air pressure at the merging portion 22, the back pressure is applied by the shield plate 71, and the air discharge path 51 on the right side in FIG.
Since the passage through is blocked, it is possible to prevent wind and rain (WR2) from entering the attic space 5.

Further, since the side end portion 34 of the cover plate 31 is shaped so as to bounce upward, when wind and rain (WR2) rising in the air guiding path 21 hits the inner surface of the side end portion 34 of the cover plate 31. The wind and rain (WR2) is returned to the air guide path 21. Therefore, wind and rain (WR2) can be more reliably prevented from blowing into the attic space 5.

Further, even when wind and rain blows directly onto the upper ventilation port 14, the wind and rain that has passed through the ventilation port 14 is received by the cover plate 31, so that it is blown into the attic space 5 through the opening 2. There is nothing to lose.

Further, since the cover plate 31 is formed so that its cross-sectional shape becomes a mountain shape, rainwater that has passed through the upper ventilation port 14 and hit the cover plate 31 does not stay and is quickly aired. It is discharged to the outside through the guide path 21 and the lower ventilation port 4.

Further, since the protrusion 36 is provided on the inner surface of the side end portion 34 of the cover plate 31, raindrops that have fallen on the outer surface 32 of the cover plate 31 through the upper ventilation port 14 are concerned. Even when it goes to the inner surface of 31, it cannot pass over the ridge 36 and proceed into the second air discharge path 41, and falls downward. Therefore, raindrops can be more reliably prevented from blowing into the attic space 5.

On the other hand, the back space 5 is efficiently ventilated. That is, the air that has flowed from the attic space 5 through the opening 2 into the first air exhaust passage 41 flows into the air guide passage 21 through the second air exhaust passage 51. At this time, in the first and second air discharge paths (41, 51),
Since there is no upper or lower meandering part (17) for obstructing the flow of air, the air is introduced into the air guide passage 21 with almost no flow resistance. In addition, the guide wall (5
2A, 52B), the side end portion 34 of the cover plate 31 forming the second air discharge path 51 is shaped to jump upward, so that the opening area of the outlet portion of the air discharge path 51 is spread. As a result, the air (AR) from the second air exhaust passage 41 flows into the air guide passage 21 without further resistance.

Air (AR) flowed into the air guide path 21
Is ascended along with the wind and rain (WR2) ascending along the guideway 21 and is discharged from the upper ventilation port 14 to the outside. At this time, since the return guide member 61 is provided below the confluence portion 22 of the second air discharge passage 51 and the air guide passage 21, it does not serve as a resistance against the air. From the above, the air in the attic space 5 can be efficiently used in the upper ventilation port 1
It is discharged from the outside.

Since the lower ventilation port 4 is also in a negative pressure state on the leeward side, part of the air (AR) flowing into the air guide path 21 descends toward the lower ventilation port 4,
At this time, the return guide member 61 guides the air (AR) toward the lower ventilation port 4. Therefore, also from this point, the air in the attic space 5 can be efficiently discharged to the outside.

When the temperature of the bimetal 85 exceeds the set temperature during a fire, the bimetal 85 bends to swing the fire stop plate 81 from the standby position to the closed position (the position shown by the solid line in FIG. 3, 2 in FIG. 4). Position and hold it at the position indicated by the dotted line). As a result, the first air discharge passage 41, which directly communicates with the opening 2, becomes the second air discharge passage 51.
Is cut off. Therefore, it is possible to suppress the momentum of the fire with a simple configuration by shutting off the air discharge passage in the cover 11 when a fire occurs.

[0070]

According to the first aspect of the present invention, the upper ventilation port is provided on the upper surface of the cover, and the inner space of the cover is formed with the air guiding path for communicating the lower ventilation port and the upper ventilation port with the cover. A plate is provided, and a standing wall that forms a first air discharge path for guiding the air that has flowed in from the attic space toward the cover plate is provided, and the air that has passed through the first air discharge path is used as an air guide path. Provide a guide wall that cooperates with the cover plate to form the second air discharge path that guides the air guide path to the merging portion, and blow into the air guide path portion below the merging portion from the lower ventilation port to raise the air guide path. Since it is possible to return the wind and rain to the lower ventilation port side and the descending air is provided with a return guide member that guides it toward the lower ventilation port, and since a shielding plate is provided on the inner surface of the cover plate,
It is possible to more reliably prevent wind and rain from blowing into the attic space without reducing ventilation efficiency.

According to the second aspect of the present invention, the upper surface of the cover is formed in a flat shape, and the upper ventilation opening is formed from a large number of holes penetratingly drilled in the upper surface over a wide area. In addition, it is possible to prevent wind and rain from blowing into the attic space without reducing ventilation efficiency.

According to the third aspect of the present invention, since the cover plate is formed so that its cross-sectional shape becomes a mountain shape, it is possible to more reliably prevent wind and rain from blowing into the attic space without reducing ventilation efficiency. Can be prevented.

According to the invention of claim 4, since the side end of the cover plate is formed so as to jump upward, it is possible to prevent wind and rain from blowing into the attic space more reliably without lowering ventilation efficiency. it can.

According to the fifth aspect of the present invention, since the protrusion is provided on the inner surface of the side end of the cover plate, raindrops can be more reliably prevented from blowing into the attic space without lowering the ventilation efficiency. it can.

According to the sixth aspect of the present invention, since the plurality of weather-weather return portions are provided in the return guide member, it is possible to more effectively prevent wind-rain from blowing into the attic space without reducing ventilation efficiency.

According to the seventh aspect of the invention, the shield plate is provided in the vicinity of the shield plate so as to be swingable via a support shaft, and is brought into contact with the standby position along the shield plate and the upper end portion of the standing wall to contact the first wall. A fire stop plate that can be positioned in a closed position that shuts off the first air discharge passage and the second air discharge passage, and is flexibly deformed when the temperature exceeds a set temperature to swing the fire stop plate from the standby position. Since a fire stop mechanism composed of a bimetal that can be positioned and held in the closed position is provided, the same effects as those of the inventions of claims 1 to 6 can be obtained, and in addition, air can be discharged from the cover when a fire occurs with a simple structure. You can cut off the fire by blocking the road.

[Brief description of drawings]

FIG. 1 is a transverse cross-sectional view for explaining an embodiment of the present invention.

FIG. 2 is likewise a side view for explaining how the cover and the side panel are attached.

FIG. 3 is likewise a transverse cross-sectional view for explaining a state in which a fire stop plate blocks an air discharge path.

FIG. 4 is a cross-sectional view for explaining a modified example of the fire stop mechanism.

FIG. 5 is a diagram for explaining a conventional ridge ventilation device.

FIG. 6 is a diagram for explaining the ridge ventilation device disclosed in Japanese Patent Laid-Open No. 2000-27392.

FIG. 7 is also a diagram for explaining the windbreak wall and the vertical meandering portion.

[Explanation of symbols]

1 roof 2 openings 4 Lower ventilation port 5 attic space Ventilator for 10 buildings 11 cover 12 Top part 13A, 13B side part 14 Upper ventilation port 15 Inside space 21 Air induction path 22 Confluence part 31 cover plate 34 side end 36 Projection 41 First air discharge path 42A, 42B standing wall 51 Second air discharge path 52A, 52B guide wall 61 Return guide member 62 Wind and rain 63 Wind and rain 71 Shield 80 Fire stop mechanism 81 Fire Stop Board 85 Bimetal

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04D 13/16

Claims (7)

(57) [Claims] 1. A cover, which covers an opening formed in a top portion of a roof from above and has an upper surface portion and a side surface portion, is provided, and air flowing from the attic space into the inner space of the cover through the opening portion is provided. In a ridge ventilation device formed so as to flow through the space and be discharged to the outside from a lower ventilation opening formed between a side surface portion and a roof surface, an upper ventilation opening is provided on the upper surface of the cover, In the inner space of, along with the inner surface of the cover, an air guide path that connects the lower ventilation port and the upper ventilation port is formed, and wind and rain that has passed through the upper ventilation port while covering the opening from above First air for guiding the air that has passed through the opening from the attic space and flows into the inner space of the cover to the covering plate by providing a cover plate through which the inflow to the attic space can be prevented. Providing a standing wall that forms a discharge path, the first A guide wall that forms a second air discharge path that guides the air that has passed through the air discharge path to a confluence portion with the air guide path is provided in the air guide path portion below the confluence portion. The wind and rain flowing from the lower ventilation port into the air guide passage and trying to rise is prevented from flowing toward the second air discharge passage, can be returned to the lower ventilation port side, and the descending air is directed to the lower ventilation port. A ventilation guide characterized in that a return guide member that guides the guide plate is provided, and a shield plate that projects toward the opening and has a lower end located below the second air discharge path is provided on the inner surface of the cover plate. apparatus. 2. The upper surface of the cover is formed in a flat shape,
The ridge ventilation device according to claim 1, wherein the upper ventilation opening is formed by a large number of holes penetratingly drilled over a wide area on the upper surface portion. 3. The ridge ventilation apparatus according to claim 1, wherein the cover plate is formed so that its cross-sectional shape is a mountain shape. 4. The ridge ventilation apparatus according to claim 1, wherein a side end portion of the cover plate is shaped so as to jump upward. 5. The ridge ventilation apparatus according to claim 1, wherein a protrusion is provided on an inner surface of a side end of the cover plate. 6. The ridge ventilation apparatus according to claim 1, wherein the return guide member is provided with a plurality of weather-weather return portions. 7. The first air discharge path and the first air discharge path, which are provided near the shield plate so as to be swingable through a support shaft and are in contact with a standby position along the shield plate and an upper end portion of the standing wall. A fire stop plate that can be positioned in a closed position that shuts off the second air discharge path, and can be flexibly deformed when the temperature exceeds a set temperature to swing the fire stop plate from the standby position to position and hold it in the closed position. 7. The building ventilation device according to claim 1, further comprising a fire stop mechanism made of a bimetal.