JPH0332911Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] This invention relates to a ventilation pipe for ventilating an attic or the like.

[Background technology]

A conventional ventilation tube will be explained based on FIGS. 3 and 4. In the figure, ventilation pipe B is the roof 1 of the building.
0, covering an opening 11 provided in a roof 10. The ventilation tube B has a circumference made up of a ventilation tube wall panel 12 and an upper surface covered with a ventilation tube roof panel 14. Ventilation tube wall panel 12
A ventilation hole 16 is provided, and the ventilation hole 16 is covered with a louver 18. Furthermore, a hood 20 is attached to the inside of the ventilation tube B to prevent rainwater from entering.

FIG. 4 is an enlarged view of the portion shown in FIG. 3. In the figure, 22 is a cover placed on the top surface of the ventilation tube roof panel 14. The outer peripheral edge of the cover 22 falls along the side end surface 14a of the ventilation tube roof panel 14 to reach the outer surface of the ventilation tube wall panel 12, and is fixed to the ventilation tube wall panel 12 together with the louver 24 with screws 26. Further, a caulking material 28 is filled between the lower end of the cover 22 and the ventilation tube wall panel 12.

According to the ventilation tube B configured in this way, outside air flows inside the ventilation tube B through the ventilation hole 16, the inside of the ventilation tube B becomes negative pressure, and the air in the attic is sucked out.
The attic will be ventilated. However, when the inside of the ventilation tube B suddenly becomes negative pressure during strong winds and the pressure difference between the ventilation tube B and the outside air increases, rainwater enters between the cover 22 and the ventilation tube wall panel 12, and furthermore, the ventilation tube wall panel 12 There was a problem in that rainwater entered the ventilation tube B through the space between the roof panel 14 and the ventilation tube roof panel 14, and entered the attic through the opening 11.

[Purpose of invention]

The purpose of this invention is to provide a ventilation tube that can reduce the infiltration of rainwater due to the pressure difference between the inside and outside.

[Disclosure of invention]

The ventilation tube of this invention has a ventilation tube wall panel that is erected on the top surface of the roof surrounding an opening provided in the roof and has ventilation holes, and the outer peripheral edge is placed on the top surface of the ventilation tube wall panel. An air layer is formed between a ventilation tube roof panel and an outer peripheral edge that covers the upper surface of the ventilation tube roof panel and protrudes outward from a side edge of the ventilation tube roof panel, and a side end surface of the ventilation tube roof panel. The ventilation cylinder wall panel has a cover that is bent downward and its lower end is fixed to the outer surface of the ventilation cylinder wall panel.

According to the configuration of this invention, an air layer is formed between the side end surface of the ventilation tube roof panel and the cover, and the outer peripheral edge of the cover is fixed to the outer surface of the ventilation tube wall panel, so that the inside of the ventilation tube is under negative pressure. When a large pressure difference occurs between the inside and outside of the ventilation tube, the pressure inside the air layer becomes an intermediate value between the pressure inside and outside the ventilation tube, which alleviates the pressure difference and reduces the infiltration of rainwater. can.

Embodiment An embodiment of this invention will be described based on FIGS. 1 and 2. Note that the same parts as in FIG. 3 are given the same reference numerals, and the explanation thereof will be omitted. As shown in FIG. 1, the ventilation pipe A of this embodiment has an opening 11 provided in the roof 10 (FIG. 2) on the top surface of the roof 10 (FIG. 2).
(FIG. 2), and a ventilation tube wall panel 12 having ventilation holes 16 (FIG. 2), and a ventilation tube roof panel 14 whose outer periphery is placed on the upper surface of the ventilation tube wall panel 12. An air layer 30 is formed between the outer peripheral edge 32a that covers the upper surface of the ventilation tube roof panel 14 and projects outward from the side edge of the ventilation tube roof panel 14, and the side end surface 14a of the ventilation tube roof panel 14. The cover 32 is bent downward to form a shape and the lower end 32b is fixed to the outer surface of the ventilation cylinder wall panel 12.
It is equipped with the following.

The outer peripheral edge 32a of the cover 32 is bent downward to form an air layer 30 between it and the side end surface 14a of the ventilation tube roof panel 14, and then horizontally bent in a direction approaching the outer surface of the ventilation tube wall panel 12. It is bent and then bent downward. The downwardly bent lower end 32b of the cover 32 is fixed to the ventilation cylinder wall panel 12 with screws 34 with a louver 24 interposed between it and the outer surface of the ventilation cylinder wall panel 12. Moreover, screw 34
A caulking material 36 is filled to cover the head of the head.

FIG. 2 is a longitudinal sectional view showing the entire structure of the ventilation tube A. An air layer 30 is formed between each outer peripheral edge 32a of the cover 32 and each side end surface 14a of the ventilation tube roof panel 14.

According to the ventilation tube A configured in this way, when outside air passes through the inside of the ventilation tube A and becomes negative pressure, and a large pressure difference occurs between the inside and outside of the ventilation tube A, the inside and outside of the ventilation tube A The air pressure in the air layer 30 located between the two is an intermediate value between the air pressure inside and outside the ventilation tube A. In this way, the air layer 30 acts as a cushion and can alleviate the pressure difference. Therefore, rainwater infiltrates through the gaps between the cover 32, the louver 24, and the ventilation tube wall panel 12, passes between the ventilation tube roof panel 14 and the ventilation tube wall panel 12, enters the ventilation tube A, and enters the inside of the ventilation tube A. It is possible to reduce penetration into the back side. In particular, when the inside of the ventilation tube A suddenly becomes negative pressure during strong winds, the pressure difference between the inside and outside of the ventilation tube A can be alleviated.

Furthermore, the pressure difference between the inside and outside of the ventilation tube A can be alleviated by simply changing the shape of the outer peripheral edge 32a of the cover 32, and no special materials or members are required to alleviate the pressure difference.

[Effect of idea]

According to the ventilation tube of this invention, an air layer is formed between the side end surface of the ventilation tube roof panel and the cover, and the outer periphery of the cover is fixed to the outer surface of the ventilation tube wall panel, so that the inside of the ventilation tube has a negative pressure. When a large pressure difference occurs between the inside and outside of the ventilation tube, the pressure inside the air layer becomes an intermediate value between the pressure inside and outside the ventilation tube, which alleviates the pressure difference and reduces the infiltration of rainwater. I can do it.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of the main part of an embodiment of this invention.
FIG. 2 is a longitudinal sectional view thereof, FIG. 3 is a longitudinal sectional view of a conventional example, and FIG. 4 is a partially enlarged view of FIG. 3. A... Ventilation tube, 10... Roof, 11... Opening, 12... Ventilation tube wall panel, 14... Ventilation tube roof panel, 14a... Side end surface, 16... Ventilation hole,
30...Air layer, 32...Cover, 32a...Outer edge, 32b...Lower end.

Claims (1)

[Scope of utility model registration request] a ventilation cylinder wall panel erected on the upper surface of the roof surrounding an opening provided in the roof and having a ventilation hole;
A ventilation tube roof panel whose outer peripheral edge is placed on the upper surface of the ventilation tube wall panel, and an outer peripheral edge that covers the upper surface of the ventilation tube roof panel and projects outward from the side edge of the ventilation tube roof panel is the ventilation tube. A ventilation tube comprising a cover bent downward to form an air layer between the side end surface of the roof panel and having a lower end fixed to the outer surface of the ventilation tube wall panel.