JP2003343056A - Ventilator for roof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothen indoor ventilation and simplify its configuration. <P>SOLUTION: To provide an air exhaust hole 11a for exhausting air through an exhaust barrel portion 11 by raising air in a building to its upper portion. A ridge cover 20 is provided at the upper portion of the air exhaust hole 11a. A board-shaped outside air back flow prevention valve 30 operated by the outdoor air is installed near the air exhaust hole 11a. The outdoor air back flow preventing valve 30 is located in such a manner that its rotating shaft 13 is above the exhaust hole and below the ridge cover 20. In no wind state, the attitude of the outdoor air back flow prevention valve 30 is located in vertically by the gravity and the ventilating passage 20a is set to 'OPEN'. When there is wind, the outside air back flow prevention valve 30 stop air blowing to the ventilation passage 20a and the wind is exhausted from the exhaust hole 11a. The position of the center of gravity of the outside air back flow prevention valve 30 is made adjustable relative to the rotation shaft 13 in distance direction. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilator installed on a roof of a building, particularly on a ridge of a combined roof, and more specifically, a roof of a building provided with a backflow prevention mechanism to promote gravity ventilation in the room. Ventilation system.

[0002]

2. Description of the Related Art Conventionally, a building ventilation device is shown in, for example, Japanese Patent Laid-Open No. 60-250162. The technique described in this publication is a technique in which a ventilation device for a roof is provided with a ventilation port at the bottom of the roof and a butterfly valve that can be opened and closed by wind force at the ventilation port. In addition, in fact fair 4-3714
Japanese Unexamined Patent Publication No. 5 and Japanese Unexamined Patent Publication No. 2001-90288 disclose a technique in which a movable plate that is opened and closed by outside wind is hung along with a ventilation port. In each of the above-mentioned conventional techniques, the force of wind is used to block the ventilation passage at the lower part of the ridge cover and the principle of atomization is used to exhaust air from the lower part of the ridge cover. There are problems that the exhaust is obstructed and the exhaust cannot be smoothly performed, and that the wing covers 20 are arranged on both the left and right sides, so that it is necessary to provide a wide wing cover 20.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a ridge exhaust device capable of easily exhausting air with an extremely simple structure, and more specifically, preventing backflow of outside air from the exhaust port to the inside of the building, An object is to provide a ridge exhaust device that can perform smooth exhaust (gravitational exhaust).

[0004]

In order to achieve the above object, the present invention employs the following means. That is, the roof ventilator according to claim 1 is provided with an exhaust port 11a at the upper part of the building that raises the air in the building and exhausts the air through the exhaust tube portion 11, and the ridge cover 20 is provided above the exhaust port 11a. Providing ventilation path 20
A plate-shaped outside air backflow prevention valve 30 that operates by the wind of the outside air is provided in the vicinity of the exhaust port 11a, and the outside air backflow prevention valve 30 is provided above the exhaust port 11a and above the ridge cover 20. The rotating shaft 13 is arranged below, and in a windless state, the posture of the outside air backflow prevention valve 30 is positioned in an upright state in the vertical direction by gravity, so that the ventilation passage 20a is "opened". The prevention valve 30 is characterized in that the air blown into the ventilation passage 20a is stopped and exhausted from the exhaust port 11a.

The roof ventilator according to a second aspect of the present invention is characterized in that, in the above-mentioned means, the position of the center of gravity of the outside air check valve 30 can be adjusted in the perspective direction with respect to the rotary shaft 13. The roof ventilator according to claim 3, wherein in any one of the above means, a stopper 22 that limits the rotation of the outside air check valve 30 is provided at a certain distance from the rotating shaft 13, and the outside air check valve 30 in the stopper 22 is provided. This part 22a
Is a plastic member.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of the same embodiment, FIG. 2 is a plan view of a main portion of the same embodiment, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG.
[FIG. 3] is an explanatory view of main parts of the same embodiment. In FIGS. 1 and 3, on the left and right of the upper part of the purlin 1 provided at the uppermost part of the parquet type building, there is provided a road plate 3 which is a lower plate of the roof tile, and at the top of the road plates 3 on both sides. Has a roof opening 3a, which serves as an exhaust passage for indoor air, formed along the length of the ridge, and serves as an exhaust port in the building.

A side plate 10 made of an aluminum alloy plate or the like is horizontally provided on an upper portion of the road plate 3, and an exhaust pipe portion 1 is provided on the side plate 10.
1 is integrally formed in a rising shape, and the upper part thereof is open to form an exhaust port 11a. A ridge cover 20 is attached by a ridge cover support frame 21 above the side plate 10 at a predetermined distance, and stoppers 22 are provided on both lower surfaces of the ridge cover 20 along the length direction of the ridge cover 20. Is provided, and an end portion 22a made of a plastic material such as a synthetic resin or a rubber-containing plastic material is provided at an end portion thereof. A space between the side plate 10 and the ridge cover 20 serves as a ventilation passage 20a, through which the wind A can pass. Further, a rotary shaft 13 is arranged in the horizontal direction above the exhaust port 11a, and an outside air check valve 30 having a substantially spindle-shaped cross section is arranged on the rotary shaft 13 so as to be swingable left and right (FIG. 3). In the figure, it swings between a solid line position and a broken line position (see reference numeral a)). The axis of the rotary shaft 13 is formed so as to be displaced above the center of gravity in the cross-sectional shape of the outside air check valve 30. For this reason,
The outside air backflow prevention valve 30 is provided as long as external force (wind force) is not applied.
Since the center of gravity is located below the rotary shaft 13, the flat surface of the outside air check valve 30 rises in a vertical state (see symbol b in FIG. 3).

A seal piece 12 made of synthetic resin, rubber or the like is provided on the left and right edges of the upper end of the exhaust tube portion 11, and the end edge of the seal piece 12 abuts the side surface of the outside air check valve 30. Thus, it is formed so that the wind does not pass through the gap between the upper end of the exhaust tube portion 11 and the outside air check valve 30. The upper end of the outside air check valve 30 can contact the stopper 22 when the wind blows and swings. In addition, in the center of the outside air check valve 30, as shown in FIG.
As shown in, the bearing elongated hole 31 is formed along the length direction, and the mounting position with respect to the rotary shaft 13 can be changed. As a result, the distance between the center of gravity of the outside air check valve 30 and the rotary shaft 13 can be adjusted. By this adjustment, it is possible to adjust the degree of inclination (sensitivity) of the outside air check valve 30 with respect to the wind force.

(Operation) With the above configuration, in the normal state (no wind), the outside air check valve 30 is formed in a vertical posture, and at this time, the warm air in the room becomes the exhaust flow a. The air is smoothly exhausted from the ventilation passages 20a on both sides through the roof opening 3a and the exhaust port 11a. At this time, since the outside air check valve 30 is upright in the vertical direction, it does not hinder the flow of the exhaust flow a. As shown in FIG. 1, when the wind A is blowing from the right side, the wind force causes the outside air check valve 30 to rotate to the left side and abut against the left side portion 22a. That is, since the area of the upper portion of the outside air check valve 30 from the center line of the rotating shaft 13 is wider than the area of the lower portion thereof, the wind force from the center line of the rotating shaft 13 to the lower portion is lower. Since it is larger than the receiving part, the upper part rotates to the left (the side in the wind flow direction). As a result, the air A blown into the ventilation passage 20a is blocked by the outside air backflow prevention valve 30, but the exhaust flow a passes from the exhaust port 11a through the ventilation passage 20a on the left side and the principle of mist blowing ( It will be discharged smoothly by pressure.

Further, since the outside air backflow prevention valve 30 has its upper center of gravity supported by the rotary shaft 13 whose mounting position is adjustable, the rotational moment (balance) can be adjusted with respect to the wind pressure (air pressure difference). It is possible.

Similarly, when there is wind from the left side, the outside air check valve 30 tilts to the position of the broken line (see reference numeral a) in FIG. 3, and the wind A from the left side is stopped, The exhaust flow a is discharged from the exhaust port 11a through the right ventilation passage 20a. In the above embodiment, the cross-sectional shape of the outside air check valve 30 is substantially spindle-shaped, but if it is plate-shaped, another cross-sectional shape, for example, a substantially triangular shape,
It may be a thin plate shape, a combination of a thin plate and a substantially circular shape, or the like, which has a shape that easily receives the wind A and tilts easily with respect to the wind force, that has a wide wind-receiving area above the rotation axis position, and a tip. Those having a light weight are preferable. Further, the swing sensitivity of the outside air backflow prevention valve 30 can be adjusted by moving the rotary shaft 13 in the bearing long hole 31, but as another means, as shown in FIG. It is also possible to fix the prevention valve 30 and the rotary shaft 13 and attach the weight 32 to the rotary shaft extension 13a separately provided on the rotary shaft 13 and adjust the position appropriately.

[0012]

EFFECTS OF THE INVENTION The present invention is particularly suitable as an exhaust structure for a highly airtight house or the like because of the above structure, indoor air can be smoothly discharged with a simple structure. In addition, it prevents backflow of outside air from the exhaust port to indoors and enables smooth exhaust (gravity ventilation). For the outside, it is closed on the positive pressure (upwind) side and opened only on the negative pressure (downwind) side. Therefore, intrusion of rainwater can be avoided. Further, it is possible to adjust the sensitivity of the outside air check valve to the wind pressure, improve the watertightness / airtightness, and cushion the shock / sound accompanying ventilation.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a plan view of an essential part of the embodiment.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is an explanatory view of a main part of the embodiment.

FIG. 5 is an explanatory view of main parts of another example of the embodiment.

[Explanation of symbols]

A ... Wind a ... Exhaust flow 1 ... Purlin 2 ... Roof 3 ... Road plate 3a ... Roof opening 10 ... Side plate 11 ... Exhaust tube 11a ...
・ Exhaust port 12 ・ ・ Seal piece 13 ・ ・ Rotating shaft 13a ・
・ Rotating shaft extension part (another example) 20 ・ ・ Building cover 20a ・ ・ Ventilation path 21 ・ ・
Building cover support frame 22 ··· Stopper 22a ··· This part 30 ·· Outside air backflow prevention valve 31 · · Bearing long hole
32 ··· Weight (another example)

Claims (3)

[Claims] [Claim 1] An exhaust port 11a for raising the air in the building to exhaust the air through the exhaust tube portion 11 is provided in the upper part of the building, and a ridge cover 20 is provided above the exhaust port 11a to form a ventilation path 20a. At the same time, a plate-shaped outside air backflow prevention valve 30 which is operated by the air of the outside air is provided near the exhaust port 11a, and the outside air backflow prevention valve 30 has a rotating shaft above the exhaust port 11a and below the ridge cover 20. 13 is arranged, and in a windless state, the posture of the outside air backflow prevention valve 30 is positioned vertically in an upright state by gravity to open the ventilation passage 20a, and in a windy state, the outside air backflow prevention valve 30 is Ventilation path 2 above
A ventilation device for a roof, characterized in that the air blown into 0a is stopped and exhausted from the exhaust port 11a. 2. The roof ventilator according to claim 1, wherein the center of gravity of the outside air check valve 30 is adjustable in the perspective direction with respect to the rotary shaft 13. 3. A stopper 22 for restricting the rotation of the outside air backflow prevention valve 30 is provided at a fixed distance from the rotary shaft 13, and a portion 22a of the outside air backflow prevention valve 30 in the stopper 22 is made of a plastic member. The roof ventilation device according to claim 1 or 2.