JPH11140998A - Wall ventilation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wall ventilation structure for preventing the occurrence of spraying in the inside of a parapet panel resulting from suction from the underneath to a wall inside vent layer in the case of strong wind, etc. SOLUTION: The wall ventilation structure is so constituted that a parapet panel 30 equipped with an air-layer 31 inside thereof is covered with a parapet cover 40, at the same time, the air-layer 31 communicates with the inside of the parapet cover 40 from a vent slit 32, and it is released to the atmosphere from an atmospheric passage 42 provided to the parapet cover 40. A wall inside vent layer 22 vertically communicating with the inside of an external wall of a building, while the wall inside vent layer 22 closes an opening section to the inside of the parapet cover 40, it is so formed that it communicates from a vent hole 37 laterally bored into the upper part of the wall inside vent layer 22 to the air-layer 31 of the inside of the parapet panel 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall ventilation structure for connecting an air layer provided inside a building outer wall to outside air.

[0002]

2. Description of the Related Art In a building using a so-called wall panel method or a method in which a panel material such as structural plywood is attached to the outside of a frame structure to form a panel, the outer wall surface of the building is Finished by an exterior material attached to the outside of the wall panel. At this time, a wall ventilation structure is employed to protect the inside of the wall from moisture and to enhance the durability of the building, and to further enhance the heat insulation and sound insulation performance of the outer wall. In this method, the gap formed between the wall panel and the exterior material is communicated in the vertical direction to form a ventilation layer, which is released to the outside air from the outside air passage provided near the back of the eaves or near the base of the building. is there. Usually, the upper part of the ventilation layer inside the wall communicates with the space of the attic, and in many cases, an integrated ventilation measure is provided between the outer wall and the attic.

However, at the rising portion of the outer wall, such as the parapet portion of a flat roof type building, the inside of the wall is structurally cramped. A typical wall ventilation structure in such a case has conventionally been as shown in FIG.

That is, the exterior material 21 is attached to the outside wall of the building via the base material outside the wall panel 10. And
Between the back surface of the exterior material 21 and the wall panel 10, an in-wall ventilation layer 22 that communicates in the vertical direction along the base material is formed.
The in-wall ventilation layer 22 is open to the outside air near the lower base.

[0005] A parapet panel 30 serving as a base structure of the parapet is erected on the upper portion of the outer wall. The exterior material 21 is attached to the outside of the parapet panel 30 to a predetermined height from below. Furthermore, the upper portions of the parapet panel 30 and the exterior material 21 are covered by a parapet cover 40 from the upper surface to the outer side. The parapet cover 40 projects outward, and a small eaves lining is formed at the lower end of the suspended front plate portion 41. The back of the eaves is opened to allow air to flow, and forms an outside air passage 42 that communicates the inside of the parapet cover 40 with outside air.

An air layer 3 is provided inside the parapet panel 30.
1 is formed, and the air layer 31 is formed on the parapet panel 3.
The inside of the parapet cover 40 communicates with the ventilation slit 32 provided on the outside surface of the cover. On the other hand, in many cases,
On the roof side of the parapet panel 30 also the attic side ventilation part 3
3 is provided, from which the air layer 31 communicates with the attic space 51.

At this time, the ventilation slit 32 is
1 is set higher than the upper end. As a result, inside the parapet cover 40, the air layer 31 inside the parapet panel 30 and the in-wall ventilation layer 22 communicate with each other and merge with each other, and they enter the outside air from the outside air passage 42 below the eaves. Will also be released. Conventionally, measures such as ventilation, heat insulation, and sound insulation of an outer wall or an attic have been taken by the above-described wall ventilation structure.

In addition, a wall ventilation structure similar to the above-described parapet structure may be used even at the upper part of the waist wall of the balcony. However, also in this case, the function and form of each unit are almost the same. Therefore,
The part where the outer wall of the building is vertically raised and the upper end of which is waterproofed is collectively referred to as a "parapet" including balconies and the like.

[0009]

According to the above-described conventional wall ventilation structure, the position of the ventilation slit 32 of the parapet panel 30 is close to the position of the upward opening of the ventilation layer 22 in the wall, and Since the opening directions are orthogonal to each other, a phenomenon as shown in FIG. 3 may occur. That is, when a strong wind blows from the outside air passage 42 below the eaves into the inside of the parapet cover 40 as shown by the arrow and passes through the ventilation slit 32 in the direction of the attic space 51, the in-wall ventilation communicating with the inside of the parapet cover 40. The area near the upward opening of the layer 22 has a negative pressure, and sucks dust near the ground from the lower opening. Then, the sucked-up dust becomes “mist spray” as indicated by a broken-line arrow, and flows from the inside of the parapet panel 30 toward the attic space 51.

[0010] This phenomenon is that the snow is sucked from below the in-wall ventilation layer 22 particularly in a cold region in winter. As a result, the inside of the wall and the attic become moist, and the performance in terms of ventilation and heat insulation deteriorates.

Therefore, the present invention provides a wall ventilation structure for preventing the occurrence of the "mist blowing" phenomenon inside the parapet panel 30 due to the suction from below into the in-wall ventilation layer 22 in a strong wind or the like. The purpose is to:

[0012]

In order to achieve the above object, a wall ventilation structure according to the present invention is provided with a parapet panel having an air layer inside the rising portion of an outer wall of a building. The upper surface and the outer surface are covered with a parapet cover, a ventilation slit is opened in the parapet panel, and an internal air layer communicates from the ventilation slit to the inside of the parapet cover, while the parapet cover is provided with an outside air passage. The air layer is formed so as to be released also to the outside air, and an inner wall ventilation layer is formed inside and outside of the building and communicates with the upper and lower sides. While being closed so as not to directly communicate with the inside of the parapet cover, the above-mentioned ventilation hole opened horizontally below the shielding member It is characterized in that are formed so as to communicate with the air layer inside La pets panel. And, by this, at the time of strong wind, inside the parapet panel, "mist spray" from the upward opening of the ventilation layer in the wall
This is to prevent the phenomenon from occurring. Note that the parapet is a generic term for a portion where the outer wall of the building is vertically raised, and includes a portion such as an upper portion of a waist wall of a balcony.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The same names and reference numerals are used for members having the same functions as those described in the description of the related art.

The outer wall of the building is provided with a wall panel 10 serving as a structural body.
Is formed by mounting an exterior material 21 on the outside of the. The wall panel 10 is loaded with a heat insulating material 12 between panel frames 11, studs, streaks and the like connected in advance in each direction, and as a face material, a structural plywood 13 on the outside.
The gypsum board 14 and the like are attached inside.

The wall panel 10 is fixed to a frame member such as a column member, a beam member, or a girder member 61. On the outside of the wall panel 10, vertical trunk edges 23 extending in the vertical direction are arranged at predetermined intervals as a base material for attaching the exterior material 21. By attaching the exterior material 21 via the vertical body edge 23, a gap which is vertically elongated by the vertical body edge 23 is formed between the back surface of the exterior material 21 and the wall panel 10. This gap communicates in the up-down direction to form the in-wall ventilation layer 22. The in-wall ventilation layer 22 is open to the outside air near the base at the bottom of the building. This in-wall ventilation layer 22
In addition to helping air to enter and exit and convection inside the wall to promote ventilation, it also has the effect of increasing the heat insulation and sound insulation of the building.

At the top of the outer wall, a parapet panel 30 is provided upright as a base structure of the parapet portion. The parapet panel 30 is formed by a panel frame 34, an outer plywood 35, an inner plywood 36, and the like.
It is mounted so as to be flush with 0. On the outside of the parapet panel 30, a vertical waist edge 23 extending from the bottom to a predetermined height is attached.
Is installed. A shielding member 24 extending in the horizontal direction is attached to the upper end of the exterior material 21 so as to close the upward opening of the in-wall ventilation layer 22.

The upper part of the parapet panel 30 is covered with a parapet cover 40. The parapet cover 40 has a sloped base material 43 projecting outward with a gradient, a front plate portion 41 hanging down to the outside of the wall surface, an eave girder 44 connecting the base material and the front plate, and enclosing them. It is formed by the cover plate 45 and the like. A small eaves lining is formed at the lower end of the front plate portion 41 between itself and the surface of the exterior material 21. The back of the eaves is configured to allow air to flow therethrough, and forms an outside air passage 42 that communicates the inside of the parapet cover 40 with outside air. Here, a ventilation gallery 46 is attached with the shielding member 24 as a base.

On the other hand, a roof base material 52 and a roof material 53 are attached to the roof side of the girder material 61 via a plurality of auxiliary members 62 and 63. On the roofing material 53, a waterproof base layer 54 and a waterproof layer 55 are provided on the parapet panel 3.
It is stuck continuously to the portion of the inner plywood 36 of 0.
An attic space 51 is formed below the roof base material 52 between the roof 71 and the ceiling 71.

The parapet panel 30 has an air space 31 inside.
It has. The air layer 31 communicates with the inside of the parapet cover 40 through the ventilation slit 32 formed in the outer plywood 35, and is also released to the outside air through an outside air passage 42 below the eaves. In addition, an attic ventilation section 33 is provided in the inner plywood 36 of the parapet panel 30, and the air layer 3 is provided.
1 also communicates with the attic space 51 from here.

Further, another ventilation hole 37 is provided below the outer plywood 35 of the parapet panel 30. The ventilation hole 37 is opened laterally from the upper part of the in-wall ventilation layer 22, and the air layer 31 inside the parapet panel 30 and the in-wall ventilation layer 22 communicate with each other through the ventilation hole 37.

That is, the air inside the in-wall ventilation layer 22 does not directly communicate with the inside of the parapet cover 40 because it is closed by the shielding member 24, and the inside of the parapet panel 30 passes through the ventilation hole 37. By bypassing and passing through the ventilation slit 32, the air flows into the inside of the parapet cover 40, and is released to the outside air.

The ventilation slit 32 is located above the shielding member 24, whereas the ventilation hole 37 is located in the shielding member 2.
4 is located below. Therefore, the ventilation slit 32 and the ventilation hole 37 are separated from each other with the shielding member 24 interposed therebetween, and their respective opening directions are not orthogonal. As a result, the respective air flows entering and exiting the ventilation slit 32 and the ventilation hole 37 are prevented from affecting each other.

With the above operation, the outside air passage 42
Even if a strong wind enters or exits the inside of the parapet cover 40, a negative pressure hardly occurs inside the in-wall ventilation layer 22, and as a result, the occurrence of the "mist blowing" phenomenon at the time of strong wind is suppressed.

The wall ventilation structure of the present invention is not limited to the embodiment described above, but can be applied as follows.

For example, the parapet panel constituting the parapet section is not an independent panel body but is integrated with a kind of roof panel constituting a roof portion, and an air layer integrated with an attic space is provided therein. It may be provided. Further, such a structure may not be formed by assembling panels and the like that have been previously processed in a factory, but may be formed as a result of on-site construction. Further, the air layer inside the parapet panel may communicate with the space under the eaves or under the floor instead of the attic space. As for the outer wall, the base material for mounting the exterior material is not limited to the vertical trunk edge. The base material may be discontinuous in the vertical direction as long as the in-wall ventilation layer communicates in the vertical direction. The wall surface is not limited to the wall panel and the exterior material, but may be a composite panel in which they are integrally formed in advance and a ventilation layer is provided inside. Also, ventilation slits,
There is no particular limitation on the shape of the opening such as the ventilation hole, the attic side ventilation portion, the outside air passage, etc. Good.

In the outside air passage under the eaves, various types of ventilation gallery can be selectively mounted, and conversely, it is not necessary to mount them.

[0027]

According to the wall ventilation structure of the present invention, a ventilation hole is formed in the upper part of the ventilation layer inside the wall at a position below the outside of the parapet panel, and the inside of the parapet panel is opened through this ventilation hole. The air layer communicates with the ventilation layer in the wall.

That is, the air inside the ventilation layer in the wall does not directly communicate with the inside of the parapet cover because it is closed by the shielding member, and the ventilation slit bypasses the inside of the parapet panel from the ventilation hole. Through the inside of the parapet cover and released to the outside air.

The ventilation slit is located above the shielding member, whereas the ventilation hole is located below the shielding member. Therefore, the ventilation slit and the ventilation hole are located at positions separated from each other with the shielding member interposed therebetween, and their opening directions are not orthogonal. This prevents the respective airflows entering and exiting the ventilation slit and the ventilation hole from affecting each other.

Therefore, even in a strong wind or the like, a negative pressure is hardly generated inside the ventilation layer in the wall, and the "mist spray" phenomenon occurs in the parapet panel due to suction from below into the ventilation layer in the wall. Is prevented. As a result, the performance of ventilation and heat insulation inside the wall is favorably maintained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a wall ventilation structure according to the present invention.

FIG. 2 is a sectional view showing a conventional general wall ventilation structure.

FIG. 3 is an explanatory diagram of a “mist blowing” phenomenon that occurs in a conventional general wall ventilation structure.

[Explanation of symbols]

 22 ventilation layer in wall 24 shielding member 30 parapet panel 31 air layer 32 ventilation slit 37 ventilation hole 40 parapet cover 42 outside air passage

Claims (1)

[Claims] 1. A parapet panel having an air layer therein is erected on an upper portion of a rising portion of an outer wall of a building, and the parapet panel is covered on the upper surface and the outside with a parapet cover, and a ventilation slit is formed in the parapet panel. While the inside air layer communicates with the inside of the parapet cover from this ventilation slit, an outside air passage is provided in the parapet cover so that the air layer is formed so as to be open to the outside air, and the building outside wall is formed. A ventilation layer in the wall communicating vertically is formed inside, and the ventilation layer in the wall is
The upward opening is closed by the shielding member so that it does not directly communicate with the inside of the parapet cover, while the lateral opening below the shielding member communicates with the air layer inside the parapet panel. The wall ventilation structure characterized by being formed so that it may perform.