JP2007285067A - Underfloor ventilation structure - Google Patents

Underfloor ventilation structure Download PDF

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JP2007285067A
JP2007285067A JP2006116207A JP2006116207A JP2007285067A JP 2007285067 A JP2007285067 A JP 2007285067A JP 2006116207 A JP2006116207 A JP 2006116207A JP 2006116207 A JP2006116207 A JP 2006116207A JP 2007285067 A JP2007285067 A JP 2007285067A
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heat insulating
insulating material
floor
underfloor
top surface
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JP4885599B2 (en
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Haruo Gen
晴夫 玄
Shinji Watanabe
真志 渡辺
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Daiwa House Industry Co Ltd
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Daiwa House Industry Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an underfloor ventilation structure in which an underfloor ventilating opening is provided between a top surface section of a foundation and a lower end of an exterior wall, which enables effective underfloor ventilation even if an undersurface of a floor-side heat insulating material is protruded downward in such a manner as to exceed the level of the top surface section of the foundation, and which also enables an exterior wall-side heat insulating material and the floor-side heat insulating material to continue into each other. <P>SOLUTION: An L-shaped ventilation guide 8, which is provided in the underfloor ventilation structure, comprises a horizontal part 8a which is arranged along the top surface section 1 of the foundation, and a vertical part 8b which is arranged along an underfloor-side lateral surface part on the top surface side of the foundation. The ventilation guide 8 makes the underfloor ventilating opening 4 and an underfloor space section 9 communicate with each other. A heat insulating material 10, which makes the exterior wall-side heat insulating material 11 and the floor-side heat insulating material 7 continue into each other, is provided on the upside of the horizontal part 8a of the ventilation guide 8. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、床下換気構造に関する。   The present invention relates to an underfloor ventilation structure.

図３に示すように、基礎天面部１と外壁パネル２の下端部との間に、スペーサー３で床下換気口４を形成し、該床下換気口４を通じて床下が換気されるようになされた床下換気構造は、従来より知られている。
特開２００６−０４５９９６号公報 As shown in FIG. 3, an underfloor vent 4 is formed by a spacer 3 between the base top surface portion 1 and the lower end of the outer wall panel 2, and the underfloor is ventilated through the underfloor vent 4. Ventilation structures are conventionally known.
JP 2006-045996 A

しかしながら、上記のような床下換気構造において、同図に示すように、例えば、大引６の上に根太レスで床板５を設置し、床側断熱材７を隣り合う大引６間に設置するような場合、該床側断熱材７の下面が基礎天面部１のレベルを越えて下方に突出してしまうことがあり、それにより、床下換気口４が床側断熱材７によって閉鎖され、床下の換気が行われにくくなってしまうという問題を生じることがある。   However, in the underfloor ventilation structure as described above, as shown in the figure, for example, the floor board 5 is installed on the large draw 6 without a joist and the floor-side heat insulating material 7 is installed between the adjacent large draws 6. In such a case, the lower surface of the floor-side heat insulating material 7 may protrude downward beyond the level of the base top surface portion 1, whereby the underfloor ventilation port 4 is closed by the floor-side heat insulating material 7, and There may be a problem that ventilation becomes difficult.

特に、床側断熱材７がグラスウール等の繊維系断熱材の場合、雨天時には、湿気を含んだ屋外の空気が床下換気口４を通じて床側断熱材７の側面部を通じて同床側断熱材の内部に侵入し、床側断熱材７の断熱性能を損なわせてしまうことがある。   In particular, when the floor-side heat insulating material 7 is a fiber-based heat insulating material such as glass wool, when it is raining, outdoor air containing moisture passes through the side of the floor-side heat insulating material 7 through the under-floor ventilation port 4 and the inside of the floor-side heat insulating material. May invade the heat insulation performance of the floor-side heat insulating material 7.

また、床側断熱材７と外壁２側の断熱材１１とを連続させるため、それらの間に図示しない断熱材を設置すると、その断熱材によって床下換気口４が閉鎖されて床下換気の妨げになってしまい、床下換気を優先させるか、断熱性能を優先させるかの択一的な選択を迫られ、進退両難の地位に陥れられてしまうという問題もある。   Moreover, in order to make the floor-side heat insulating material 7 and the heat insulating material 11 on the outer wall 2 side continuous, if a heat insulating material (not shown) is installed between them, the under-floor ventilation port 4 is closed by the heat insulating material, thereby hindering under-floor ventilation. As a result, there is a problem that an alternative choice between prioritizing underfloor ventilation or prioritizing heat insulation performance is forced, and the situation becomes difficult to advance and retreat.

本発明は、上記のような問題点に鑑み、基礎天面部と外壁下端部との間に床下換気口が設けられ、床側断熱材の下面が、基礎天面部のレベルないしはその近傍に達し、あるいは、基礎天面部のレベルを越えて下方に突出しているような場合であっても、床下を有効的に換気することができる床下換気構造を提供することを課題とする。   In view of the above problems, the present invention is provided with an underfloor ventilation port between the base top surface portion and the lower end of the outer wall, and the bottom surface of the floor side heat insulating material reaches the level of the base top surface portion or the vicinity thereof. Or even if it is a case where it protrudes below beyond the level of a basic top surface part, it aims at providing an underfloor ventilation structure which can ventilate underfloor effectively.

上記の課題は、基礎天面部と外壁下端部との間に床下換気口が設けられ、床側断熱材の下面が、基礎天面部のレベルないしはその近傍に達し、あるいは、基礎天面部のレベルを越えて下方に突出している床下換気構造であって、
基礎天面部に沿って配置される水平部と、基礎天面側の床下側の側面部に沿って配置される垂直部とを備えたＬ形の通風ガイドが設けられ、該通風ガイドによって前記床下換気口と床下空間部とが連通されていることを特徴とする床下換気構造によって解決される（第１発明）。 The above problem is that there is an underfloor ventilation port between the base top surface and the lower end of the outer wall, and the bottom surface of the floor-side insulation reaches or is close to the level of the base top surface or the level of the base top surface. An underfloor ventilation structure that protrudes downward beyond
An L-shaped ventilation guide provided with a horizontal portion arranged along the base top surface portion and a vertical portion arranged along the side surface portion on the floor bottom side on the foundation top surface side is provided, and the floor under the floor is provided by the ventilation guide The problem is solved by the underfloor ventilation structure characterized in that the ventilation port and the underfloor space communicate with each other (first invention).

この床下換気構造では、Ｌ形の通風ガイドが設けられていることで、基礎天面部と外壁下端部との間の床下換気口は、床側断熱材に妨げられることなく、床下空間部と連通され、床下を有効的に換気することができる。   In this underfloor ventilation structure, an L-shaped ventilation guide is provided, so that the underfloor ventilation port between the basic top surface and the lower end of the outer wall communicates with the underfloor space without being obstructed by the floor-side heat insulating material. And can effectively ventilate under the floor.

第１発明において、通風ガイドの水平部の上側に、外壁側の断熱材と床側の断熱材とを連続させる断熱材が設けられている場合（第２発明）は、該断熱材によって、床と外壁との間の断熱欠損をなくすことができて建物の断熱性能を高めることができ、しかも、該断熱材によって床下換気が妨げられることがなく床下を有効的に換気することができる。   In the first invention, when a heat insulating material is provided on the upper side of the horizontal portion of the ventilation guide to continuously connect the heat insulating material on the outer wall side and the heat insulating material on the floor side (second invention), the heat insulating material Insulation deficiency between the outer wall and the outer wall can be eliminated, the heat insulation performance of the building can be improved, and the underfloor ventilation can be effectively ventilated without being disturbed by the heat insulating material.

第１，第２発明において、床側断熱材が繊維系断熱材からなり、Ｌ形の通風ガイドの垂直部が板状をしていて、通風が、該板状垂直部と基礎天面側の床下側の側面部との間を通じて行われるようになされている場合（第３発明）は、通風ガイドの板状垂直部によって、雨天時に、湿気を含んだ屋外の空気が床下換気口を通じて床側断熱材の側面部を通じて同床側断熱材の内部に侵入するのを防ぐことができ、床側の繊維系断熱材の断熱性能を損なわせてしまうのを防ぐことができる。   In the first and second inventions, the floor-side heat insulating material is made of a fiber-based heat insulating material, the vertical portion of the L-shaped ventilation guide has a plate shape, and the ventilation is between the plate-shaped vertical portion and the base top surface side. When it is designed to be carried out between the side part on the underfloor side (third invention), the outdoor air containing moisture is brought into the floor side through the underfloor ventilation opening in the rain by the plate-like vertical part of the ventilation guide. It can prevent entering into the inside of the floor-side heat insulating material through the side surface portion of the heat insulating material, and can prevent the heat insulating performance of the fiber heat insulating material on the floor side from being impaired.

本発明は、以上のとおりのものであるから、基礎天面部と外壁下端部との間に床下換気口が設けられ、床側断熱材の下面が、基礎天面部のレベルないしはその近傍に達し、あるいは、基礎天面部のレベルを越えて下方に突出しているような場合であっても、床下を有効的に換気することができる。   Since the present invention is as described above, an underfloor ventilation port is provided between the base top surface portion and the lower end of the outer wall, and the bottom surface of the floor-side heat insulating material reaches the level of the base top surface portion or the vicinity thereof. Or even if it is a case where it protrudes below beyond the level of a basic top surface part, the under floor can be ventilated effectively.

次に、本発明の実施最良形態を図面に基づいて説明する。   Next, the best mode for carrying out the present invention will be described with reference to the drawings.

図１に示す第１実施形態の床下換気構造は、図１（イ）に示すように、基礎天面部１と外壁パネル２の下端部との間にスペーサー３によって床下換気口４が形成されている一方、床板５は大引６の上に根太レスで設置されていると共に、隣り合う大引６間には、グラスウール等の繊維系からなる床側断熱材７が設置され、該床側断熱材７の下面は、基礎天面部１のレベルを越えて下方に突出した構造になっている。   In the underfloor ventilation structure of the first embodiment shown in FIG. 1, an underfloor vent 4 is formed by a spacer 3 between the basic top surface portion 1 and the lower end portion of the outer wall panel 2 as shown in FIG. On the other hand, the floor board 5 is installed on the large drawing 6 without joisting, and between the adjacent large drawings 6, a floor-side heat insulating material 7 made of fiber such as glass wool is installed, and the floor-side heat insulation is provided. The lower surface of the material 7 has a structure that protrudes downward beyond the level of the basic top surface portion 1.

この床下換気構造において、８が通風ガイドであり、該通風ガイド８は、基礎天面部１に沿って配置される水平部８ａと、基礎天面側の床下側の側面部に沿って配置される垂直部８ｂとを備えたＬ形をしている。そして、図１（ロ）に示すように、水平部８ａも垂直部８ｂも板状をしていて、板状水平部８ａの下面側にはリブ８ｃ…が間隔的に備えられ、該板状水平部８ａがリブ８ｃ…を介して基礎天面部１に設置されることで板状水平部８ａと基礎天面部１との間に通気用の隙間が形成され、また、板状垂直部８ｂは、基礎天面側の床下側の側面部との間に通気用の隙間を形成し、この隙間と床側断熱材７との間を仕切るように設置され、これら隙間を通じて床下換気口４が床下空間部９と連通されている。   In this underfloor ventilation structure, 8 is a ventilation guide, and the ventilation guide 8 is arranged along a horizontal portion 8a arranged along the basic top surface portion 1 and a side portion on the under floor side of the basic top surface side. It is L-shaped with a vertical part 8b. As shown in FIG. 1B, both the horizontal portion 8a and the vertical portion 8b are plate-like, and ribs 8c are provided at intervals on the lower surface side of the plate-like horizontal portion 8a. The horizontal portion 8a is installed on the basic top surface portion 1 via the ribs 8c, so that a ventilation gap is formed between the plate-shaped horizontal portion 8a and the basic top surface portion 1, and the plate-shaped vertical portion 8b is , A ventilation gap is formed between the bottom side of the foundation top side and the side of the floor side heat insulating material 7 is formed between the gap and the floor side heat insulating material 7, and the underfloor vent 4 is located under the floor through these gaps. It communicates with the space 9.

そして、通風ガイド８の板状水平部８ａの上側に断熱材１０が設置され、該断熱材１０が、外壁２側の断熱材１１と床側断熱材７とを連続させている。   And the heat insulating material 10 is installed above the plate-shaped horizontal part 8a of the ventilation guide 8, and this heat insulating material 10 makes the heat insulating material 11 and the floor side heat insulating material 7 by the side of the outer wall 2 continue.

上記の床下換気構造では、Ｌ形の通風ガイド８が備えられ、その板状水平部８ａと基礎天面部１との間の隙間、及び、板状垂直部８ｂと基礎天面部側の床下側の側面部との間の隙間を通じて、床下換気口４が床下空間部９と連通されているので、床下を床側断熱材７に妨げられることなく有効的に換気することができると共に、通風ガイド８の板状垂直部８ｂによって、床側断熱材７の雨天時の吸湿が防がれて床側断熱材７の断熱性能低下を防ぐことができる。   In the underfloor ventilation structure described above, the L-shaped ventilation guide 8 is provided, and the gap between the plate-like horizontal portion 8a and the base top surface portion 1 and the bottom side of the plate-like vertical portion 8b and the base top surface portion side are provided. Since the underfloor ventilation port 4 communicates with the underfloor space portion 9 through the gap between the side portions, the underfloor can be effectively ventilated without being obstructed by the floor-side heat insulating material 7, and the ventilation guide 8. The plate-like vertical portion 8b prevents moisture absorption during the rain of the floor-side heat insulating material 7 and prevents a decrease in the heat insulating performance of the floor-side heat insulating material 7.

しかも、通風ガイド８の板状水平部８ａの上側に設置された断熱材１０によって床と外壁との間の断熱欠損をなくすことができて建物の断熱性能を高めることができ、また、床下換気口４は、板状水平部８ａと基礎天面部１との間の隙間を通じて床下空間部９と連通されているので、該断熱材１０によって床下換気口４が閉鎖されてしまうこともなく、床下を有効的に換気することができる。   In addition, the heat insulating material 10 installed on the upper side of the plate-like horizontal portion 8a of the ventilation guide 8 can eliminate a heat insulation defect between the floor and the outer wall, and can improve the heat insulating performance of the building. Since the mouth 4 communicates with the underfloor space portion 9 through a gap between the plate-like horizontal portion 8a and the base top surface portion 1, the underfloor ventilation port 4 is not closed by the heat insulating material 10, and the underfloor Can be effectively ventilated.

図２に示す第２実施形態の床下換気構造は、外壁側の断熱材１１と床側断熱材７とを連続させる断熱材１０が通風ガイド８の水平部８ａと一体化されているもので、発泡樹脂等の一体成形品からなっており、第１実施形態と同様の作用効果が奏されると共に、部品の点数を削減することができる。   In the underfloor ventilation structure of the second embodiment shown in FIG. 2, a heat insulating material 10 that makes the outer wall side heat insulating material 11 and the floor side heat insulating material 7 continuous is integrated with the horizontal portion 8 a of the ventilation guide 8. It is made of an integrally molded product such as foamed resin, and has the same effects as those of the first embodiment, and the number of parts can be reduced.

以上に、本発明の実施形態を示したが、本発明はこれに限られるものではなく、発明思想を逸脱しない範囲で各種の変更が可能である。例えば、上記の実施形態では、Ｌ形の通風ガイド８の水平部８ａと基礎天面部１との間の隙間、及び、通風ガイド８の垂直部８ｂと基礎天面側の床側の側面との間の隙間を通じて、床下換気口４を床下空間部９と連通させた場合を示しているが、第１，第２発明等においては、ピース状のＬ形通風ガイドを間隔的に列設し、隣り合う通風ガイド間を、床下換気口４と床下空間部９との連通部としてもよい。   Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the gap between the horizontal portion 8a of the L-shaped ventilation guide 8 and the foundation top surface portion 1, and the vertical portion 8b of the ventilation guide 8 and the floor side surface on the foundation ceiling surface side are provided. Although the case where the underfloor ventilation port 4 is communicated with the underfloor space portion 9 through the gap between them is shown, in the first and second inventions, piece-shaped L-shaped ventilation guides are arranged at intervals. It is good also as a communicating part of the underfloor vent 4 and the underfloor space part 9 between adjacent ventilation guides.

また、上記の実施形態では、外壁側断熱材１１と床側断熱材７とを連続させる断熱材１０が、床側断熱材７と別体で、外壁側断熱材１１とも別体のものからなっているが、外壁側断熱材１１と床側断熱材７のいずれか一方又は両方を延長し、該延長部分を、外壁側断熱材１１と床側断熱材７とを連続させる断熱材としてもよい。   Moreover, in said embodiment, the heat insulating material 10 which makes the outer wall side heat insulating material 11 and the floor side heat insulating material 7 continue is separate from the floor side heat insulating material 7, and consists of a thing separate from the outer wall side heat insulating material 11. However, one or both of the outer wall side heat insulating material 11 and the floor side heat insulating material 7 may be extended, and the extended portion may be used as a heat insulating material that makes the outer wall side heat insulating material 11 and the floor side heat insulating material 7 continuous. .

また、上記の実施形態では、床側断熱材７が繊維系断熱材である場合を示したが、第１，第２発明では、床側断熱材７が発泡系断熱材などであってもよい。   In the above embodiment, the case where the floor-side heat insulating material 7 is a fiber-based heat insulating material has been described. However, in the first and second inventions, the floor-side heat insulating material 7 may be a foam-based heat insulating material. .

また、上記の実施形態では、床側断熱材７の下面が基礎天面部１のレベルを越えて下方に突出している場合を示したが、本発明は、床側断熱材７の下面が基礎天面部１のレベルないしはその近傍に達している場合に用いられてもよい。   Further, in the above embodiment, the case where the lower surface of the floor-side heat insulating material 7 protrudes downward beyond the level of the basic top surface portion 1 is shown. It may be used when the level of the surface portion 1 or the vicinity thereof is reached.

更に、本発明では、床側断熱材の下面が、基礎天面部のレベルないしはその近傍に達し、あるいは、基礎天面部のレベルを越えて下方に突出していればよく、従って、床は根太レス床でなくてもよいし、また、床側断熱材は大引間に設置される断熱材でなくてもよい。   Furthermore, in the present invention, it is only necessary that the lower surface of the floor-side heat insulating material reaches the level of the base top surface portion or the vicinity thereof, or protrudes downward beyond the level of the base top surface portion. In addition, the floor-side heat insulating material may not be a heat insulating material installed between the large draws.

図（イ）は第１実施形態の床下換気構造を示す断面正面図、図（ロ）は同換気構造に用いられるＬ型通風ガイドの斜視図である。FIG. 1 (a) is a sectional front view showing the underfloor ventilation structure of the first embodiment, and FIG. 2 (b) is a perspective view of an L-type ventilation guide used in the ventilation structure. 図（イ）は第２実施形態の床下換気構造を示す断面正面図、図（ロ）は同換気構造に用いられる断熱材一体型のＬ型通風ガイドの斜視図である。FIG. 1A is a cross-sectional front view showing the underfloor ventilation structure of the second embodiment, and FIG. 2B is a perspective view of an L-type ventilation guide integrated with a heat insulating material used in the ventilation structure. 関連技術を示すもので、床下換気構造の断面正面図である。It shows a related technique and is a cross-sectional front view of the underfloor ventilation structure.

符号の説明Explanation of symbols

１…基礎天面部
２…外壁パネル（外壁）
４…床下換気口
７…床側断熱材
８…通風ガイド
８ａ…水平部
８ｂ…垂直部
９…床下空間部
１０…断熱材
１１…外壁側断熱材 1 ... Basic top surface 2 ... Outer wall panel (outer wall)
DESCRIPTION OF SYMBOLS 4 ... Underfloor ventilation port 7 ... Floor side heat insulating material 8 ... Ventilation guide 8a ... Horizontal part 8b ... Vertical part 9 ... Under floor space part 10 ... Heat insulating material 11 ... Outer wall side heat insulating material

Claims (3)

基礎天面部と外壁下端部との間に床下換気口が設けられ、床側断熱材の下面が、基礎天面部のレベルないしはその近傍に達し、あるいは、基礎天面部のレベルを越えて下方に突出している床下換気構造であって、
基礎天面部に沿って配置される水平部と、基礎天面側の床下側の側面部に沿って配置される垂直部とを備えたＬ形の通風ガイドが設けられ、該通風ガイドによって前記床下換気口と床下空間部とが連通されていることを特徴とする床下換気構造。 An underfloor ventilation port is provided between the base top surface and the lower end of the outer wall, and the bottom surface of the floor-side insulation reaches or near the level of the base top surface or protrudes downward beyond the level of the base top surface. Underfloor ventilation structure,
An L-shaped ventilation guide provided with a horizontal portion arranged along the base top surface portion and a vertical portion arranged along the side surface portion on the floor bottom side on the foundation top surface side is provided, and the floor under the floor is provided by the ventilation guide An underfloor ventilation structure characterized in that a vent opening communicates with an underfloor space. 前記通風ガイドの水平部の上側に、外壁側の断熱材と床側の断熱材とを連続させる断熱材が設けられている請求項１に記載の床下換気構造。   2. The underfloor ventilation structure according to claim 1, wherein a heat insulating material is provided on the upper side of the horizontal portion of the ventilation guide to continuously connect the heat insulating material on the outer wall side and the heat insulating material on the floor side. 前記床側断熱材が繊維系断熱材からなり、前記Ｌ形の通風ガイドの垂直部が板状をしていて、通風が、該板状垂直部と基礎天面側の床下側の側面部との間を通じて行われるようになされている請求項１又は２に記載の床下換気構造。   The floor-side heat insulating material is made of a fiber-based heat insulating material, and the vertical portion of the L-shaped ventilation guide has a plate shape, and the ventilation is formed between the plate-shaped vertical portion and the side surface portion on the floor below the base top surface side. The underfloor ventilation structure according to claim 1 or 2, wherein the underfloor ventilation structure is configured to be performed between the two.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014173354A (en) * 2013-03-11 2014-09-22 Daiwa House Industry Co Ltd Ventilation structure for exterior thermal insulation building
JP2020165243A (en) * 2019-03-29 2020-10-08 大和ハウス工業株式会社 building

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JP2559149B2 (en) * 1989-12-08 1996-12-04 フクビ化学工業株式会社 Highly breathable housing
JP2005315003A (en) * 2004-04-30 2005-11-10 Panahome Corp Underfloor ventilation structure

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Publication number Priority date Publication date Assignee Title
JP2559149B2 (en) * 1989-12-08 1996-12-04 フクビ化学工業株式会社 Highly breathable housing
JP2005315003A (en) * 2004-04-30 2005-11-10 Panahome Corp Underfloor ventilation structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014173354A (en) * 2013-03-11 2014-09-22 Daiwa House Industry Co Ltd Ventilation structure for exterior thermal insulation building
JP2020165243A (en) * 2019-03-29 2020-10-08 大和ハウス工業株式会社 building
JP7274914B2 (en) 2019-03-29 2023-05-17 大和ハウス工業株式会社 building

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