JP2006169943A - Extension building with ventilating structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To lengthen the life of an extension building by effectively preventing damp under the floor of an extended story to prevent the occurrence of corrosion and mold of building underfloor members of the extended story in a building extended upward without demolishing an existing building. <P>SOLUTION: In this building, a foundation for extension is provided outside a foundation of the existing building, and support members are erected thereon. An extension roof is provided above the roof of the existing building, and new floor members are provided below the extension roof and above the roof of the existing building to provide a habitable space between the new floor members and the extension roof. New wall members are mounted to the outside of the support members. A space between the new wall members and the wall members of the existing building is made a ventilating passage for ventilating a space formed between the new floor members and the existing building, and the ventilating passage communicates with the outside through ventilation ports. The new wall members are mounted to the support members to surround the whole periphery of the existing building, and ventilation ports are provided in the new wall members or the foundation for extension around the existing building. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an extension building provided with a ventilation structure capable of effectively removing moisture under the floor of an extension floor in a building extended upward without dismantling the existing building.

  Conventionally, for example, in order to make a two-story building into a three-story building, a new three-story part cannot be built on the upper part of the second floor because of the strength of pillars, walls, beams, etc. There was no other way than removing all existing two-story buildings and building a three-story building on the site, but this conventional method is not only uneconomical but also increases industrial waste. And the residents were forced to move until the new building was completed.

Therefore, in view of such circumstances, the present inventor proposes a construction method and a building that can be used for the extension in the vertical direction as it is without occupants moving temporarily, using existing buildings. (See Patent Document 1).
The invention described in Patent Document 1 is a novel in which a new foundation is provided so as to surround the existing building, and a new structure is constructed above the existing building by standing a steel column above the new foundation. It is based on a new idea and is very novel and excellent that can solve many of the problems related to the conventional extension method.

However, since the invention described in Patent Document 1 is a novel construction method that has not existed in the past, it has the following problems that need not be considered in conventional buildings.
That is, since the invention described in Patent Document 1 is a special extension method that leaves an existing building without being dismantled, a space is inevitably generated between the floor under the extension floor and the existing building. Since the space is blocked from the outside by the outer wall of the extension, moisture tends to accumulate. Therefore, corrosion of members and generation of flaws are caused under the floor of the extension floor, which may shorten the life of the entire building.

  As described above, the extension obtained by the invention of Patent Document 1 is based on a new idea that the existing building is expanded without dismantling, and thus does not become a problem as far as the conventional building. Measures against moisture below the 2nd floor and above were a major problem.

JP 2000-282696 A

  The present invention has been made to solve the above-mentioned problems, and in a building extended upward without dismantling the existing building, moisture under the floor of the extension floor can be effectively prevented, It is an object of the present invention to provide an extension building having a ventilation structure that prevents the corrosion of building members and the occurrence of flaws under the extension floor and extends the life of the extension.

  In the invention according to claim 1, an extension foundation is provided outside the foundation of the existing building, a support member is erected on the extension foundation, and the top of the support member is above the roof of the existing building. An additional roof supported by the support member is provided, and a new floor member supported by a middle portion of the support member is provided below the extended roof and above the roof of the existing building. A new living space is provided between the member and the extension roof, and a new wall member is mounted on the outside of the support member, and the wall of the new wall member and the existing building The space formed between the members is a ventilation passage for ventilating the space formed between the new floor member and the top of the existing building, and the ventilation passage is a ventilation passage. It communicates with the outside through the mouth, and the new wall member It mounted on said support member so as to surround the 囲全 body, about the vent ventilation structure with build-building, characterized in that thus provided for the new wall member or build-substructure around the existing buildings.

  In the invention according to claim 2, the ventilation opening is provided at an upper position and a lower position around the existing building, and the ventilation opening provided at the upper position includes the new floor member and the existing building. 2. The extension building with a ventilation structure according to claim 1, wherein the building is opened facing a space formed between the top and the top of the building.

  The invention according to claim 3 is provided with a ventilation structure according to claim 1 or 2, wherein a fan for sending air in the passage to the ventilation port is disposed in the ventilation passage. Concerning extension buildings.

According to the first aspect of the present invention, the space formed between the new wall member and the wall member of the existing building is the space formed between the new floor member and the top of the existing building. The ventilation passage for ventilating the interior of the building is provided with a ventilation opening that communicates the ventilation passage with the outside. It can be replaced with air. Therefore, it is possible to suppress an increase in moisture in the underfloor space of the extension floor, prevent corrosion of building members and generation of flaws, and extend the life of the extension.
Furthermore, since the new wall member is attached to the support member so as to surround the entire periphery of the existing building, and a ventilation opening is provided in the new wall member around the existing building, the existing building and the new wall member are provided. An air layer is formed between them and a heat insulating effect is exhibited, and the air in the underfloor space of the extension floor can be replaced with external air through the ventilation opening. Therefore, it becomes the outstanding extension building which can suppress the increase in the moisture in the underfloor space of an extension floor, having the heat insulation effect in the existing building part.

  According to the invention according to claim 2, since the ventilation openings are provided at the upper position and the lower position of the new wall member, it becomes possible to convection air between the ventilation passage and the external space, It is possible to efficiently vent the air in the space below the extension floor.

  According to the invention of claim 3, since the fan for sending the air in the ventilation passage to the ventilation opening is disposed in the ventilation passage, the air in the underfloor space on the extension floor is forcibly ventilated. It becomes possible to replace with external air through the use passage and the ventilation port, and a high moisture suppression effect can be exhibited.

DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of an extension building with a ventilation structure according to the present invention will be described with reference to the drawings.
FIG.1 and FIG.2 is a schematic sectional drawing which shows the extension building with a ventilation structure based on this invention.
The extension building (1) according to the present invention has an extension foundation on the outside of the foundation of the existing building (2), and a support member (3) made of a steel column or the like is erected on the extension foundation. An extension roof (5) supported by the top of the support member (3) is provided above the roof (4) of the existing building, and is below the extension roof (5) and the roof (4) of the existing building. By providing a beam (6) supported in the middle part of the support member (3) above and providing a new floor member (7) above the beam (6), a new floor member (7) and It is a building obtained by providing a new living space (8) between the extended roof (5) and mounting a new wall member (9) outside the support member (3).

  In the present invention, after the extension roof (5) is provided in the extension method, the roof (4) of the existing building (2) may be removed or left without being removed. When the roof (4) is left, it is preferable to remove only the skin members such as tiles, slate, and waterproof layer in order to reduce the weight burden, but it is not always necessary to remove them.

  The roof (4) of the existing building (2) is a flat roof in the illustrated example, but the shape is not particularly limited. Besides the flat roof, a dormitory roof, a square roof, a six-column roof, an eight-column roof Roof, M-shaped roof, Y-shaped roof, saw roof, crossover roof, gable roof, beckoning roof, single-flow roof, beckoning roof, cross-roof roof, crossover roof, folded back roof, half-gable roof, burrow roof The roof may be any shape used in existing buildings such as a roof, a mansard roof, a corner roof, a warped roof, a dome roof, a vault, and a butterfly.

  In addition, the number of floors of the existing building (2) and the extension building (1) is not particularly limited. For example, the existing building (2) has one, two, three, four, five floors. The extension building (1) can be 2 stories, 3 stories, 4 stories, 5 stories, 6 stories, 7 stories, etc. In the figure, (14) is a beam supporting a floor member on the third floor, (15) is a beam supporting a roof member, (16) is a living space on the third floor, and (17) is a floor member on the second floor. .

  The type of the existing building (2) may be a house such as a detached house or an apartment house, a store such as a convenience store, a supermarket, a department store, a public facility such as a school or a government office, or an office. It may be a building or the like and is not particularly limited.

  The extension building (1) according to the present invention is a space formed between the new wall member (9) and the wall member (18) of the existing building (2) in the extension building having the above-described configuration ( A) is a ventilation passage for ventilating the space (B) formed between the new floor member (7) and the top of the existing building (the roof (4) in the illustrated example). A ventilation port (11) is formed to allow communication between the passage and the outside (the outside of the extension building).

The top of the existing building refers to the roof (4) of the existing building (2) when the roof of the existing building is not removed in the extension building (1). Etc.) is removed, it indicates the uppermost part after removal.
In the following text, “the top of the existing building” is described as “the roof of the existing building”, but this is for ease of understanding based on the drawings, and the present invention is applied to all implementations. It includes the case where the roof of the existing building is removed in the form.

  Fig. 1 shows a three-story extension building (1) obtained by extending a one-story existing building (2), and Fig. 2 shows an extension of a two-story existing building (2). It is the resulting three-story extension building (1). In addition, the arrow in a figure has shown the flow of air.

  In the extension building (1) of FIGS. 1 and 2, a new wall member (9) is attached to the support member (3) so as to surround the entire periphery of the existing building (2). That is, a new wall member (9) is mounted over the entire height of the support member (3).

As shown in FIGS. 1 and 2, the ventilation structure of the extension building (1) in which the new wall member (9) is attached to the support member (3) so as to surround the entire periphery of the existing building (2) Will be described.
In these extension buildings (1), the ventilation port (11) mentioned above is provided in the new wall member (9) around the existing building (2). The ventilation ports (11) are preferably provided on all wall members (wall surfaces), but are preferably provided on at least two wall members (wall surfaces) facing each other.
The ventilation port (11) can be provided in the ground portion of the foundation for extension instead of or in addition to the new wall member (9).

Thus, the new floor member (7) and the existing building are provided by providing the ventilation port (11) in the new wall member (9) or the foundation for extension around the existing building (2). Space (A) in which the air in the space (B) formed between the roof (4) is formed between the new wall member (9) and the wall member (18) of the existing building (2) It will be discharged to the outside through the ventilation port (11).
At this time, if the ventilation port (11) is provided at a lower position (specifically, a height position close to the ground surface) of the wall member (9) or an extension base, as shown in the illustrated example, moisture is included. Since air is heavy and flows downward, it is preferable because moisture is easily discharged to the outside.

  The ventilation port (11) can be formed, for example, by attaching an iron lattice or a perforated board to a hole opened in the wall member (9) or the extension base.

  In the extension building (1) shown in FIG. 1 and FIG. 2, the ventilation port (11) can be provided at the upper position and the lower position of the new wall member (9). Here, the upper position is almost the same as or slightly higher than the roof (4) of the existing building (2), and the ventilation port (11) has a new floor member (7) and the top of the existing building ( In the illustrated example, it is preferable to provide an opening facing the space (B) formed with the roof (4). The lower position is preferably a height position close to the ground surface, and can be provided on the extension foundation.

FIG. 3 shows a case where such a configuration is adopted in the extension building (1) shown in FIG.
As shown in the figure, by providing the ventilation port (11) at the upper position and the lower position of the ventilation passage (A), it becomes possible to convection air between the ventilation passage (A) and the external space. With this convection, the air in the underfloor space (B) on the extension floor can be efficiently ventilated.

In the extension building (1) shown in FIGS. 1 to 3, the new wall member (9) is attached to the support member (3) so as to surround the entire periphery of the existing building (2). An air layer is formed between the building (2) and the new wall member (9) to exert a heat insulating effect.
At the same time, it becomes possible to replace the air in the underfloor space (B) of the extension floor with the outside air through the new wall member (9) or the ventilation opening (11) provided in the extension foundation.
Therefore, it becomes the outstanding extension building which can suppress the increase in the humidity in the underfloor space of an extension floor, having the heat insulation effect in the existing building part.

In the present invention, in all the embodiments described above, a fan for sending the air in the passage to the ventilation port (11) can be disposed in the ventilation passage (A).
4 and 5 are diagrams showing an example in which the fan (13) is disposed in the ventilation passage (A) in the extension building (1) of FIGS. 1 and 2.

  The fan (13) is provided so as to create an air flow in the vertical direction of the ventilation passage (A), and the air in the ventilation passage (A) is forcibly ventilated by the rotation of the fan (13). The air can be discharged from the mouth (11) or the outside air can be forcibly taken into the ventilation passage (A) from the ventilation port (11).

  The number and position of the fans (13) are not limited to the illustrated example. For example, fans are also arranged in the underfloor space (B) of the new extension floor, and the ventilation passage (A) is provided from the underfloor space (B). It is also possible to preferably employ a configuration that creates a substantially horizontal air flow toward the air and a configuration in which a fan is disposed so as to face the ventilation port (11) so that air enters and exits from the ventilation port. In the present invention, two or more arrangements of these exemplified fans can be arbitrarily combined and employed.

In the present invention, a humidity sensor is installed in the underfloor space (B) and / or the ventilation passage (A), and the fan is automatically turned on when the relative humidity value measured by the humidity sensor exceeds a certain value. It can also be set as the structure which provides the action | operation control apparatus to act | operate.
In addition, according to the relative humidity value measured by the humidity sensor, the rotation of the fan is switched between the forward direction and the reverse direction, and the air flow that causes the air in the underfloor space (B) to flow out from the ventilation port (11) to the outside. In addition, a switching control device that automatically switches the flow of taking outside air into the underfloor space (B) from the ventilation opening (11) can be provided.

Furthermore, in the present invention, a humidity control material can be disposed in the underfloor space (B) and / or the ventilation passage (A). The humidity conditioning material may be sprayed as it is, or may be placed in a container such as a bag.
As humidity conditioning materials, for example, diatom shale, acid clay, activated clay, activated carbon, charcoal, bamboo charcoal, sepiolite, zeolite, silica gel, aluminosilicate, perlite, atanogite, attapulgite, allophane, montmorillonite, lightweight cellular concrete, etc. are used. be able to.

At the top of the extension roof (5), an artificial ground can be set up to plant plants and create a garden, a greenhouse to grow vegetables and flowers in the greenhouse, and an enclosure to raise animals. .
Planting a plant on the top of the extension roof (5) can help alleviate the heat island phenomenon, which has become a major problem in urban areas in recent years. In addition, from the viewpoint of alleviating the heat island phenomenon, a configuration in which a plant can be planted on the surface of the new wall member (9) can be preferably employed.

  The present invention is applied to an extension building that is expanded upward without dismantling an existing building.

It is a schematic sectional drawing which shows the extension building with a ventilation structure which concerns on this invention. It is a schematic sectional drawing which shows the extension building with a ventilation structure which concerns on this invention. It is a schematic sectional drawing which shows the extension building with a ventilation structure which concerns on this invention. It is a figure which shows the example which has arrange | positioned the fan in the channel | path for ventilation in the extension building of FIG. It is a figure which shows the example which has arrange | positioned the fan in the channel | path for ventilation in the extension building of FIG.

Explanation of symbols

1 Extension building 2 Existing building 3 Support member (pillar)
4 Roof of existing building 5 Extension roof 6 Beam 7 New floor member 8 New wall member 9 New living space 11 Ventilation port 13 Fan 18 Wall member A of existing building A passage for ventilation (new wall member and existing building Space formed between the wall member of the object)
B Underfloor space on the extension floor (space formed between new floor members and the top of existing buildings)

Claims (3)

  An extension foundation is provided outside the foundation of the existing building, a support member is erected on the extension foundation, and an extension roof supported at the top of the support member is provided above the roof of the existing building. A new floor member is provided below the extension roof and above the roof of the existing building. The floor member is supported by a middle portion of the support member, and between the new floor member and the extension roof. A new living space is provided, and a new wall member is mounted on the outside of the support member, and is formed between the new wall member and the wall member of the existing building. The space is a ventilation passage for ventilating the space formed between the new floor member and the top of the existing building, and the ventilation passage communicates with the outside through a ventilation opening. The new wall member surrounds the entire surrounding area of the existing building. Support member is mounted, said ventilation openings existing building ventilation structure with build-building, characterized in that thus provided for the new wall member or build-substructure in the surrounding.   The ventilation openings are provided at an upper position and a lower position around the existing building, and the ventilation openings provided at the upper position are formed between the new floor member and the top of the existing building. The extended building with a ventilation structure according to claim 1, wherein the building is opened facing the space. The extension building with a ventilation structure according to claim 1 or 2, wherein a fan for sending air in the passage to the ventilation port is disposed in the ventilation passage.

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