JPH0368309B2 - - Google Patents

Description

[Detailed Description of the Invention] <Field of Application of the Invention> The present invention relates to a vent cap, particularly a vent that has excellent wind and rain shutoff properties and is suitable for high-rise areas where complex wind movements such as building winds occur. Regarding caps.

<Prior art> Conventional vent caps are disclosed, for example, in Japanese Utility Model Publication No. 61-3016, Japanese Utility Model Application Publication No. 57-199736, Japanese Utility Model Application Publication No. 57-44331, and Japanese Utility Model Application Publication No. 59-185528. There are known things that can be done.

<Problems to be solved by the invention> However, in all of these conventional vent caps, if the wind and rain shut-off performance is good, the exhaust performance is poor, and if the exhaust performance is good, the wind and rain shut-off performance is insufficient. However, it was not possible to satisfy both wind/rain protection and exhaust performance at the same time. In addition, sufficient consideration has not been given to the effects of wind blowing rain from below, such as the wind blowing from a building.

Therefore, the present invention aims to provide a vent cap that satisfies both wind and rain shutoff performance and exhaust performance, not only against normal wind and rain, but also against wind blowing rain from below.

<Means for Solving the Problems> As a means for achieving the above object, the first invention [the invention according to claim 1] includes a first hood body having a spherical recess, and a first hood body having a spherical recess; A vent cap is constituted by a second hood body having an exhaust hole around which a raised spherical arc-shaped raised edge is formed, and an exhaust pipe having a tip opening for exhaust at its tip. , the first hood body is attached to the distal end of the exhaust pipe so that the raised edge covers the circumference of the distal opening of the exhaust pipe and the exhaust hole faces the distal opening of the exhaust pipe, and the first hood body is attached to the second hood body. The two hood bodies are arranged parallel to each other at a constant interval, and a main exhaust passage is formed between both hood bodies, and a sub exhaust passage is formed between the raised edge of the second hood body and the tip of the exhaust pipe. In the second invention [the invention according to claim 2], the first hood body has a spherical recess, and the exhaust hole has a spherical arc-shaped raised edge that rises toward the recess. A vent cap is constituted by a second hood body, a ring body having a flange portion, and an exhaust pipe having a tip opening for exhaust at the tip, and the first hood body, the second hood body, the ring body, and the tip side Then, the first hood body, the second hood body, and the ring body are arranged in a layered manner at regular intervals in the order of the hood body assembly, which is integrated through the flange portion of the ring body, and this hood body assembly is removed by the ring body. By attaching it to the tip of the cylinder, the first,
A main exhaust passage is formed between both second hood bodies, a sub-exhaust passage is formed between the raised edge of the second hood body and the tip of the exhaust pipe, and a flange portion of the second hood body and the ring body is formed. The main idea is to form an extension of the sub-exhaust passage between the two.

<Function> In other words, the first hood body can reliably prevent wind and rain from entering the tip opening of the exhaust pipe from the front, and the second hood body can prevent wind and rain from entering the exhaust pipe from the side. By changing the direction of the raised edge of the body so that it does not face the opening at the tip of the exhaust pipe and allowing it to blow through between the two hood bodies, it is possible to prevent intrusion, so wind and rain can come from any direction. The main exhaust passage formed between the first and second hood bodies, which are arranged parallel to each other, has excellent wind and rain protection. In addition to creating an exhaust opening with a large width, a sub-exhaust path is also formed between the raised edge of the second hood body and the tip of the exhaust pipe, which is hardly restricted by outside wind blowing through. Excellent exhaust performance is obtained, and since the exhaust gas is guided by the spherical recess of the first hood body and is discharged from the above-mentioned exhaust passage in a smooth flow, low pressure loss is achieved. , the exhaust performance will be even better (first invention). Furthermore, in addition to the effects common to the first invention, the first hood body and the second invention
The hood body is integrated as a hood body assembly,
This hood body assembly is attached to the exhaust pipe with a ring body, and a sub-exhaust passage is also formed between the second hood body and the flange of the ring body, making it easy to attach and remove each hood body. At the same time, a wider exhaust path can be formed and the exhaust performance can be further improved (second invention).

<Example> Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2. Incidentally, both the first and second inventions will be explained without making any particular distinction.

This vent cap 1 is composed of a first hood body 2, a second hood body 3, a ring body 4, and an exhaust pipe 5. The first hood body 2 is provided with a spherical recess 7, and A spherical convex portion 8 protruding outward is provided in correspondence with the concave portion 7, and the second hood body 3 also has an exhaust hole 9 in its center.
A spherical arc-shaped raised edge 10 that rises toward the recess 7 is formed around the exhaust hole 9, and the ring body 4 is provided with a flange portion 12.

Both first and second hood bodies 2, 3 and ring body 4
The first hood body 2 and the second hood body are connected from the tip side using four connecting rods 13 erected around the flange portion 12.
The hood body 3 and the ring body 4 are layered in this order (i.e.
They are arranged and integrated at regular intervals (so that they are parallel to each other) to form a hood body assembly 14, and this hood body assembly 14 is attached to the tip of the exhaust pipe 5. The significance of forming the hood body assembly 14 in this way is as follows:
By allowing the second hood body 3 to be mounted floating above the tip opening 15 of the exhaust pipe 5, in addition to the main exhaust passage 17 formed between the first hood body 2 and the second hood body 3, a sub It also forms an exhaust path 18,
The advantages are that the exhaust performance is further improved and that the attachment and detachment of each hood body 2, 3 becomes easier.

In addition, 19 in FIG. 2 is a wall of the building, and 20 is an exhaust duct.

Hereinafter, the exhaust state and wind/rain protection properties of this vent cap 1 will be explained.

Wind/rain W tip opening 15 from the front (arrow A)
In this case, the spherical convex portion 8 guides the wind and rain W to flow as shown in the figure, thereby weakening the impact force and reducing the impact force. , changing its direction to a direction that makes it difficult to invade.

Regarding wind and rain W hitting both exhaust passages 17 and 18 from the side (arrow B), the raised edge 10 of the second hood body 3
The direction is as shown in the figure.
Its intrusion is prevented by changing the direction so that it does not face side 5 and blowing through between both hood bodies 2 and 3.

Therefore, the wind and rain performance is equally excellent against wind and rain W coming from any direction.
This is based on the idea that wind and rain should not enter the vent cap, and in addition to reducing the ``exhaust path'' as much as possible, it also focuses on preventing wind and rain from entering from above. This is very different from the conventional system in which the exhaust passages were unevenly distributed on the lower side or on the left and right sides, and is one of the major features of this invention. That is, although wind and rain W are freely allowed to enter and pass through the main exhaust passage 17 itself, which is formed around the entire circumference and has a sufficient capacity, it is not allowed to enter the tip opening 15 of the exhaust pipe 5. By not having the exhaust gas, it is possible to secure a sufficient area for the exhaust passage and also to satisfy wind and rain protection.

The exhaust gas E is guided to form a smooth flow in the spherical recess 7 of the first hood body 2 and is discharged to the outside through both the main and sub exhaust passages 17 and 18, resulting in low pressure loss. In combination with the above-mentioned setting of a sufficient exhaust path area, excellent exhaust performance is achieved.

<Effects of the Invention> As explained above, the vent cap according to the first invention has both the first and second hood bodies arranged in layers (parallel) to form an exhaust passage, and prevents wind and rain from coming in from the sides. In this case, the raised edge of the second hood body directs the air to blow through to block the wind and rain, while the exhaust gas is guided to form a smooth flow in the concave part of the first hood body. As a result, a wide exhaust opening area and low pressure loss combine to ensure excellent exhaust performance, while also ensuring reliable wind and rain protection against wind and rain from any direction. It has the effect of being able to
The vent cap according to the second invention is a vent cap according to the first invention.
In addition to the advantages common to the invention, both the first and second hood bodies are integrated as a hood body assembly;
This hood body assembly is attached to the exhaust pipe, and a sub-exhaust passage is also formed between the second hood body and the flange of the ring body, making it possible to obtain a wider exhaust opening and improve exhaust performance. This has the effect of further improving the performance of the hood, and also makes it easier to attach and remove each hood body.

[Brief explanation of drawings]

1 is a schematic perspective view of the vent cap, and FIG. 2 is a schematic sectional view taken along the arrow line in FIG. 1. 1... Vent cap, 2... First hood body,
3... Second hood body, 4... Ring body, 5... Exhaust pipe, 7... Recessed part, 9... Exhaust hole, 10... Raised edge, 12... Flange part, 14... Hood body assembly, 15...Tip opening, 17...Main exhaust path,
18...Sub exhaust path.

Claims (1)

[Scope of Claims] 1. A first hood body having a spherical concave portion; a second hood body having an exhaust hole surrounded by a spherical arc-shaped raised edge that bulges toward the concave portion; an exhaust pipe having a tip opening for exhaust, the second hood body covering the circumference of the tip opening of the exhaust tube with its raised edge, and having its exhaust hole facing the tip opening of the exhaust tube. the first hood body is arranged parallel to the second hood body at a constant interval, and a main exhaust passage is formed between the two hood bodies. With,
A vent cap in which a sub-exhaust passage is formed between the raised edge of the second hood body and the tip of the exhaust pipe. 2. A first hood body having a spherical recessed portion; a second hood body having an exhaust hole around which a spherical arc-shaped raised edge that rises toward the recessed portion; a ring body having a flange portion; The first hood body, the second hood body, and the ring body are arranged in layers in the order of the first hood body, the second hood body, and the ring body from the tip side. The hood assembly is arranged at regular intervals and is integrated through the flange portion of the ring body, and is attached to the tip of the exhaust pipe by the ring body, and between the first and second hood bodies. A main exhaust passage is formed, and a sub-exhaust passage is formed between the raised edge of the second hood body and the tip of the exhaust pipe, and a sub-exhaust passage is formed between the second hood body and the flange portion of the ring body. A vent cap formed by an extension of the vent cap.