JP6679223B2

JP6679223B2 - Ventilation structure and ventilation material for buildings

Info

Publication number: JP6679223B2
Application number: JP2015117051A
Authority: JP
Inventors: 公隆細谷; 三澤　真; 真三澤; 大輔 ▲高▼木; 雅裕幅田
Original assignee: Kurashiki Spinning Co Ltd
Current assignee: Kurashiki Spinning Co Ltd
Priority date: 2015-06-09
Filing date: 2015-06-09
Publication date: 2020-04-15
Anticipated expiration: 2035-06-09
Also published as: JP2017002551A

Description

本発明は、建築物の換気構造に関し、より詳しくは、ベランダの手すり壁、陸屋根外周部のパラペット等の腰壁の換気構造に関する。 The present invention relates to a ventilation structure for a building, and more particularly to a ventilation structure for a handrail wall of a veranda and a waist wall such as a parapet on the outer periphery of a flat roof.

住宅等の壁には、躯体の劣化防止等の要請から、換気構造を備えたものが求められる。ベランダ等の腰壁についても、例えば、腰壁上端の笠木下に水平方向に長い換気部を設けることが行われている。例えば、特許文献１には、パラペット部の外壁の上端に沿って通気孔を有する部材を配置することにより、パラペット部内を換気する構造が記載されている。また、特許文献２には、陸屋根等の外周部に立設される立ち上がり部において、上端部に取り付けられた笠木の下に、外部と立ち上がり部の内部中空部とを連通する通気経路を形成した換気構造が記載されている。 Walls of houses and the like are required to have ventilation structures in order to prevent deterioration of the body. As for the waist wall such as a veranda, for example, a ventilation section that is long in the horizontal direction is provided below the head tree at the upper end of the waist wall. For example, Patent Document 1 describes a structure for ventilating the inside of the parapet part by disposing a member having a ventilation hole along the upper end of the outer wall of the parapet part. Further, in Patent Document 2, in a rising portion that is erected on the outer peripheral portion of a flat roof or the like, a ventilation path that communicates the outside with an internal hollow portion of the rising portion is formed under the head tree attached to the upper end portion. The ventilation structure is described.

特開２０１２−１０２４８６号公報JP 2012-102486 A 特開２０１４−０３１７０９号公報JP, 2014-031709, A

しかしながら、従来の腰壁の換気構造では、腰壁躯体の防水に関して、改善の余地があった。このような換気構造においては、換気のための通気を確保しつつ、腰壁内部への雨水の侵入や、笠木下に侵入した雨水が腰壁躯体を濡らして腐食させることを防止する必要がある。 However, in the conventional waist wall ventilation structure, there is room for improvement regarding waterproofing of the waist wall body. In such a ventilation structure, it is necessary to prevent the infiltration of rainwater into the waist wall and the rainwater that has invaded under the umbrella tree to wet and corrode the body of the waist wall while ensuring ventilation for ventilation. .

特許文献１に記載された換気構造は、通気路の中ほどに遮蔽板を設けることによって、通気路を通って雨水がパラペット内部に侵入することを防止する。しかし、カバー部材（本明細書の笠木に相当）の下に侵入する雨水によって、パラペット部の上端面に位置する笠木（本明細書の通し部材に相当）が濡れることを防止することについては記載がない。 The ventilation structure described in Patent Document 1 prevents rainwater from entering the inside of the parapet through the ventilation passage by providing the shielding plate in the middle of the ventilation passage. However, there is a description about preventing rainwater invading under the cover member (corresponding to the heading in this specification) from wetting the heading located at the upper end surface of the parapet part (corresponding to the passing member in the specification). There is no.

特許文献２に記載された換気構造は、立ち上がり部の本体壁部（本明細書の腰壁躯体に相当）の上部を覆うように防水シートを貼設することにより、笠木下に侵入した雨水から腰壁躯体を防水する。しかし、このように防水シートで躯体上部を覆う方法は、作業に手間がかかるという問題があった。 In the ventilation structure described in Patent Document 2, by attaching a waterproof sheet so as to cover the upper part of the main body wall portion of the rising portion (corresponding to the waist wall body of the present specification), it is possible to prevent rainwater from entering under the umbrella tree. Waterproof the waist wall structure. However, the method of covering the upper part of the body with the waterproof sheet as described above has a problem that the work is troublesome.

本発明は上記を考慮してなされたものであり、ベランダや陸屋根外周部の腰壁の笠木下換気構造について、腰壁内部の換気を行いつつ、腰壁躯体の防水が可能であって、施工が容易な新規な構造を提供することを目的とする。また、そのような換気構造を実現するための換気材を提供することを目的とする。 The present invention has been made in consideration of the above, the ventilation structure of the waist wall of the outer periphery of the veranda or flat roof, while the ventilation of the inside of the waist wall, it is possible to waterproof the waist wall body, construction It is intended to provide a novel structure that can be easily manufactured. Moreover, it aims at providing the ventilation material for implement | achieving such a ventilation structure.

本発明の換気構造は、第１および第２の換気材と、防水材と、笠木取付部材と、笠木とを有する。第１および第２の換気材は、腰壁躯体上部の厚さ方向の両側に沿って配置され、それぞれ、前記腰壁内部と外部を連通する通気路が形成された通気部と該通気部から突出する平板状の取付部とを有し、該取付部が前記腰壁躯体上面に固定される。防水材は、前記第１換気材の取付部と前記第２換気材の取付部との間を水密に塞ぐ。笠木取付部材は、前記第１換気材の取付部、前記第２換気材の取付部および前記防水材を介して前記腰壁躯体上面に固定される。笠木は、前記笠木取付部材に係止され、前記第１換気材の側方から前記笠木取付部材の上方を経て前記第２換気材の側方までを連続して覆う。 The ventilation structure of the present invention includes first and second ventilation materials, a waterproof material, a headstock mounting member, and a headstock. The first and second ventilation members are arranged along both sides in the thickness direction of the upper part of the waist wall structure, and from the ventilation part and the ventilation part in which the ventilation paths communicating the inside and outside of the waist wall are formed, respectively. And a projecting flat plate-shaped mounting portion, and the mounting portion is fixed to the upper surface of the waist wall body. The waterproof material seals the space between the mounting portion of the first ventilation material and the mounting portion of the second ventilation material in a watertight manner. The Kasaki attachment member is fixed to the upper surface of the waist wall body through the attachment portion of the first ventilation member, the attachment portion of the second ventilation member, and the waterproof material. The headstock is locked to the headstock mounting member and continuously covers from the side of the first ventilation member to the side of the second ventilator through the upper side of the headboard mounting member.

この構成によって、施工容易に、腰壁内部の換気と腰壁躯体の防水を合わせて実現することができる。 With this configuration, it is possible to easily realize ventilation by combining ventilation inside the waist wall and waterproofing of the waist wall body.

好ましくは、前記第１換気材の通気部および／または前記第２換気材の通気部は、外部空間に面して形成された外側開口と、前記腰壁の内部空間に面して形成された内側開口とを有し、前記外側開口から前記内側開口に通ずる前記通気路の途中に、該通気路を迂回させる遮蔽部をさらに有する。 Preferably, the ventilation part of the first ventilation member and / or the ventilation part of the second ventilation member are formed so as to face the outer space facing the outer space and the inner space of the waist wall. An inner opening, and a shield part that bypasses the air passage is further provided in the middle of the air passage extending from the outer opening to the inner opening.

ここで、通気路を迂回させるとは、外側開口と内側開口とを直接結ぶ直線の経路がないようにすることを意味する。これにより、通気路を通って腰壁内部へ雨水が侵入することをより効果的に抑制できる。 Here, bypassing the ventilation path means that there is no straight path that directly connects the outer opening and the inner opening. This makes it possible to more effectively prevent rainwater from entering the waist wall through the ventilation passage.

さらに好ましくは、前記第１換気材および／または前記第２換気材は、前記外側開口の外部空間側に気流誘導部を有する。 More preferably, the first ventilation member and / or the second ventilation member has an airflow guide portion on the outer space side of the outer opening.

これにより、換気材と笠木の間に進入する空気のうち、より多くを通気路に誘導し、笠木下の空間に雨水の混じった空気が侵入することを抑制できる。 As a result, more of the air entering between the ventilation member and the headstock can be guided to the ventilation path, and the air mixed with rainwater can be prevented from entering the space under the headstock.

さらに好ましくは、前記第１換気材および／または前記第２換気材は、第１部品と第２部品とを有する。そして、前記第１部品は、第１水平面と、前記第１水平面の一側端から下方に折曲して、垂れ壁状に形成された気流誘導板と、前記気流誘導板の前記第１水平面側に間隔を開けて、垂れ壁状に形成された遮蔽板とを有する。そして、前記第２部品は、第２水平面と、前記第２水平面の一側端から下方に折曲して、前記遮蔽板の前記取付部側に形成され、前記内側開口が形成された内側壁と、前記内側壁の下端から折曲して形成され、前記遮蔽板の下方に位置する底壁と、前記底壁の前記内側壁と反対の側端から上方に折曲して形成され、前記遮蔽板と前記気流誘導板の間に位置し、前記外側開口が形成された外側壁とを有しており、前記底壁と前記外側壁の境界となる折曲部に水抜き穴が形成されている。そして、前記第１部品と前記第２部品は、前記第１水平面を上、前記第２水平面を下にして重ね合わされて、平板状の前記取付部を形成する。 More preferably, the first ventilation member and / or the second ventilation member has a first part and a second part. The first component includes a first horizontal plane, an airflow guide plate that is bent downward from one end of the first horizontal plane, and is formed in a hanging wall shape, and the first horizontal plane of the airflow guide plate. And a shielding plate formed in the shape of a hanging wall with a space on the side. The second component is formed on the second horizontal plane and one side end of the second horizontal plane downward, is formed on the mounting portion side of the shielding plate, and is formed on the inner wall having the inner opening. And a bottom wall formed by bending from a lower end of the inner wall, and a bottom wall located below the shielding plate, and an upper part formed by bending upward from a side end of the bottom wall opposite to the inner wall. It has an outer wall that is located between the shield plate and the airflow guide plate, and has the outer opening formed therein, and a drainage hole is formed in the bent portion that is the boundary between the bottom wall and the outer wall. . Then, the first component and the second component are stacked with the first horizontal surface facing upward and the second horizontal surface facing downward to form the flat plate-shaped mounting portion.

ここで、水平、下方などの語は、換気材が施工された状態での姿勢に基づく。また、気流誘導板は上記発明の気流誘導部の、遮蔽板は上記発明の遮蔽部の一形態である。このような構成により、複雑な断面形状を容易に実現することができる。 Here, terms such as “horizontal” and “downward” are based on the posture in which the ventilation material is installed. The airflow guide plate is one form of the airflow guide unit of the above invention, and the shield plate is one form of the shield unit of the above invention. With such a configuration, a complicated cross-sectional shape can be easily realized.

さらに好ましくは、前記第１水平面と前記第２水平面は、重ね合わされた部分の複数の箇所で点接合されている。これにより換気材の製造がより容易になる。 More preferably, the first horizontal plane and the second horizontal plane are point-joined at a plurality of points in the overlapped portion. This makes the ventilation material easier to manufacture.

本発明の換気材は、断面がほぼ一様な長尺物であって、第１部品と第２部品とを有する。そして、前記第１部品は、第１水平面と、前記第１水平面の一側端から下方に折曲して、垂れ壁状に形成された気流誘導板と、前記気流誘導板の前記第１水平面側に間隔を開けて、垂れ壁状に形成された遮蔽板とを有する。そして、前記第２部品は、第２水平面と、前記第２水平面の一側端から下方に折曲して、前記遮蔽板の前記取付部側に形成され、前記内側開口が形成された内側壁と、前記内側壁の下端から折曲して形成され、前記遮蔽板の下方に位置する底壁と、前記底壁の前記内側壁と反対の側端から上方に折曲して形成され、前記遮蔽板と前記気流誘導板の間に位置し、前記外側開口が形成された外側壁とを有しており、前記底壁と前記外側壁の境界となる折曲部に水抜き穴が形成されている。そして、前記第１部品と前記第２部品は、前記第１水平面を上、前記第２水平面を下にして重ね合わされて接合される。 The ventilation member of the present invention is an elongated member having a substantially uniform cross section and has a first part and a second part. The first component includes a first horizontal plane, an airflow guide plate that is bent downward from one end of the first horizontal plane, and is formed in a hanging wall shape, and the first horizontal plane of the airflow guide plate. And a shielding plate formed in the shape of a hanging wall with a space on the side. The second component is formed on the second horizontal plane and one side end of the second horizontal plane downward, is formed on the mounting portion side of the shielding plate, and is formed on the inner wall having the inner opening. And a bottom wall formed by bending from a lower end of the inner wall, and a bottom wall located below the shielding plate, and an upper part formed by bending upward from a side end of the bottom wall opposite to the inner wall. It has an outer wall that is located between the shield plate and the airflow guide plate, and has the outer opening formed therein, and a drainage hole is formed in the bent portion that is the boundary between the bottom wall and the outer wall. . The first component and the second component are superposed and joined with the first horizontal surface facing upward and the second horizontal surface facing downward.

この構成により、換気のための通気路を通って腰壁内部に雨水が侵入することを抑制できる。また、この換気材を２つ用いて、腰壁上部の両側に配置することにより、笠木下に侵入した雨水に対する腰壁躯体の防水構造を容易に実現することができる。 With this configuration, it is possible to prevent rainwater from entering the inside of the waist wall through the ventilation passage. Further, by arranging the two ventilation members on both sides of the upper part of the waist wall, it is possible to easily realize the waterproof structure of the waist wall body against rainwater that has invaded under the umbrella tree.

本発明の換気構造または換気材によれば、施工容易に、腰壁内部の換気と腰壁躯体の防水を合わせて実現することができる。 ADVANTAGE OF THE INVENTION According to the ventilation structure or ventilation material of this invention, the ventilation of the inside of a waist wall and the waterproofing of a waist wall structure can be implement | achieved easily by construction easily.

本発明の一実施形態の換気構造の断面図である。It is sectional drawing of the ventilation structure of one Embodiment of this invention. 本発明の一実施形態の換気材のＡ断面図、Ｂ正面図（図２ＡのＢ矢視図）、Ｃ裏面図（図２ＡのＣ矢視図）、およびＤ底面図（図２ＡのＤ矢視図）である。A cross-sectional view of a ventilation member according to an embodiment of the present invention, a B front view (view from the arrow B of FIG. 2A), a C back view (view from the arrow C of FIG. 2A), and a bottom view D (arrow D of FIG. (View). 本発明の一実施形態の換気材の断面拡大図である。It is a cross-sectional enlarged view of the ventilation material of one Embodiment of this invention. 本発明の一実施形態における腰壁躯体の斜視図である。It is a perspective view of the waist wall body in one embodiment of the present invention. 本発明の一実施形態の換気構造の施工手順を示す図である。It is a figure which shows the construction procedure of the ventilation structure of one Embodiment of this invention. 本発明の一実施形態における防水テープ貼付部分を示す断面模式図である。It is a cross-sectional schematic diagram which shows the waterproof tape sticking part in one Embodiment of this invention. 本発明の一実施形態における防水テープ貼付部分を示す断面模式図である。It is a cross-sectional schematic diagram which shows the waterproof tape sticking part in one Embodiment of this invention. 腰壁躯体構造の変形例を示す図である。It is a figure which shows the modification of a waist wall structure structure.

本発明の換気構造の実施形態を図に基づいて説明する。 An embodiment of a ventilation structure of the present invention will be described based on the drawings.

図４において、腰壁の躯体１１は、長手方向に間隔をおいて設けられた間柱２１と、間柱の上面に水平に架け渡された通し部材２０と、長手方向に間隔をおいて通し部材の側面に固定された縦胴縁２２とを有する。腰壁躯体は、すべて木製の部材で構成され、通し部材が腰壁躯体の上面を形成している。 In FIG. 4, the skeleton body 11 of the waist wall includes studs 21 provided at intervals in the longitudinal direction, a through member 20 laid horizontally on the upper surface of the stud, and a through member at an interval in the longitudinal direction. And a vertical furring strip 22 fixed to the side surface. The waist wall skeleton is entirely made of a wooden member, and the through member forms the upper surface of the waist wall skeleton.

図１において、腰壁の換気構造１０は、上記腰壁躯体に加えて、外装材２３、２３、第１換気材３０、第２換気材３１、笠木取付部材３３、笠木３５を有する。 In FIG. 1, the waist wall ventilation structure 10 includes exterior members 23, 23, a first ventilation member 30, a second ventilation member 31, a headstock mounting member 33, and a headstock 35 in addition to the waist wall body.

外装材２３は縦胴縁２２に固定されている。これにより、２枚の外装材と通し部材２０に囲まれた、腰壁の内部空間１２が形成される。外装材は、特に限定されず、無機材料等からなる各種市販のものを用いることができる。 The exterior material 23 is fixed to the vertical furring strip 22. Thereby, the inner space 12 of the waist wall surrounded by the two exterior materials and the through member 20 is formed. The packaging material is not particularly limited, and various commercially available materials made of an inorganic material or the like can be used.

通し部材２０の上部の両側には第１換気材３０および第２換気材３１が固定されている。第１および第２換気材は、いずれも、断面がほぼ一様な長尺物で、筒状に延びる通気部４１と、通気部の側方にひれ状に突出する平板状の取付部４３を有する。通気部内には通気路４２が形成され、腰壁外部と腰壁内部空間１２を連通する。第１換気材と第２換気材の形状は異なっていてもよいが、部材の種類を減らすことによりコストダウンが可能となるので、同一形状であることが好ましい。換気材の詳細は後述する。 The 1st ventilation material 30 and the 2nd ventilation material 31 are being fixed to both sides of the upper part of the through member 20. Each of the first and second ventilation members is an elongated object having a substantially uniform cross section, and includes a ventilation part 41 extending in a tubular shape and a flat plate-shaped mounting part 43 protruding laterally of the ventilation part. Have. A ventilation path 42 is formed in the ventilation portion, and connects the outside of the waist wall and the inside space 12 of the waist wall. The first ventilation member and the second ventilation member may have different shapes, but it is preferable that they have the same shape because the cost can be reduced by reducing the types of members. Details of the ventilation material will be described later.

第１および第２換気材３０、３１は、それぞれの取付部４３、４３が、通し部材２０の上面に、厚さ方向の両側から延びるように配置され、第１換気材の取付部と第２換気材の取付部との間が防水テープ３２によって水密に塞がれる。これにより、腰壁躯体上面が、躯体の厚さＤの全体にわたって、第１換気材の取付部、防水テープおよび第２換気材の取付部によって連続して覆われる。 The first and second ventilation members 30, 31 are arranged such that their respective mounting portions 43, 43 extend from both sides in the thickness direction on the upper surface of the through member 20, and the first ventilation member mounting portion and the second ventilation member The space between the ventilation member and the mounting portion is watertightly closed by the waterproof tape 32. As a result, the upper surface of the waist wall skeleton is continuously covered with the attachment portion of the first ventilation member, the waterproof tape, and the attachment portion of the second ventilation member over the entire thickness D of the skeleton.

防水テープ３２としては、合成樹脂や合成ゴム製などの市販のものを用いることができる。また、防水テープの代わりに、他の防水材、例えば板状部材と不定形シーリング材を用いてもよい。施工の容易さの点からは、防水材として防水テープを用いることが好ましい。 As the waterproof tape 32, a commercially available product such as synthetic resin or synthetic rubber can be used. Further, instead of the waterproof tape, other waterproof materials such as a plate member and an amorphous sealing material may be used. From the viewpoint of ease of construction, it is preferable to use a waterproof tape as the waterproof material.

笠木取付部材３３は、腰壁の長手方向に適当な間隔をおいて、第１および第２換気材の取付部と防水テープの上に配置され、ビス３４等を用いて、通し部材２０上面に固定される。笠木取付部材の形状や材質は特に限定されず、金属製、合成樹脂製などのものを好適に用いることができる。 The Kasagi attachment member 33 is disposed on the waterproof tape and the attachment portions of the first and second ventilation members at appropriate intervals in the longitudinal direction of the waist wall, and is attached to the upper surface of the through member 20 using screws 34 or the like. Fixed. There is no particular limitation on the shape and material of the head frame attachment member, and a metal or synthetic resin material can be preferably used.

第１および第２換気材３０、３１と外装材２３は、後者の上端で、片ハットジョイナー３６をバックアップ材として、不定形シーリング材３７を用いて水密に接続される。なお、バックアップ材は、ハットジョイナーのような成形品に限られず、軟質発泡樹脂やゴム製の紐状のものなど、種々公知のものを用いることができる。 The first and second ventilation members 30 and 31 and the exterior member 23 are watertightly connected to each other at the upper end of the latter by using the one-sided joiner 36 as a backup member and the irregular sealing member 37. Note that the backup material is not limited to a molded product such as a hat joiner, and various known materials such as a soft foamed resin or a rubber-like material can be used.

笠木３５は、笠木取付部材３３に係止されて、第１換気材３０の側方から笠木取付部材の上方を経て第２換気材３１の側方までを連続して覆う。笠木の下には笠木下空間１３が形成される。笠木の形状や材質は特に限定されず、金属製、合成樹脂製などのものを好適に用いることができる。加工の容易さ、耐久性、軽量性などの点から、笠木としては、アルミやアルミ合金製のものを好適に用いることができる。笠木の形状は、笠木取付部材に係止可能であるように、笠木取付部材と組で設計される。 The headstock 35 is locked to the headstock mounting member 33 and continuously covers from the side of the first ventilation member 30 to the side of the second ventilation member 31 through the upper side of the headboard mounting member. A space under the umbrella tree 13 is formed under the umbrella tree. The shape and material of the head tree are not particularly limited, and those made of metal, synthetic resin or the like can be preferably used. From the standpoints of ease of processing, durability, lightness, etc., it is possible to suitably use aluminum or aluminum alloy as the purse. The shape of the headstock is designed in combination with the headstock mounting member so that it can be locked to the headboard mounting member.

次に、第１換気材３０の詳細を図２および図３に基づいて説明する。以下の説明は、第２換気部材３１についても同様に当てはまる。なお、以下において、上下、水平、垂直などの語は、換気材が施工された状態での姿勢に基づく。また、内側および外側とは、換気材から見て腰壁の中心に近い側および遠い側をいう。 Next, details of the first ventilation member 30 will be described with reference to FIGS. 2 and 3. The following description is similarly applied to the second ventilation member 31. In the following, terms such as up, down, horizontal, and vertical are based on the posture in which the ventilation material is installed. The inner side and the outer side refer to the side closer to the center of the waist wall and the side farther from the center of the waist wall as seen from the ventilation material.

換気材３０は、長尺物であって、後述する開口や接合部の有無による違いを除いて断面が一様である。換気材は、筒状に延びる通気部４１と、通気部の側方にひれ状に突出する平板状の取付部４３を有する。換気材は、第１部品５０と第２部品６０からなる。第１部品および第２部品は、それぞれ１枚の金属板からプレス加工および折り曲げ加工によって成形されている。第１部品および第２部品を構成する金属板としては、加工の容易さ、耐久性などの点から、亜鉛合金めっき鋼板を好適に用いることができる。 The ventilation member 30 is a long member, and has a uniform cross section except for the difference due to the presence or absence of an opening and a joint described later. The ventilation member has a ventilation portion 41 extending in a tubular shape, and a flat plate-shaped mounting portion 43 projecting in a fin shape laterally of the ventilation portion. The ventilation member includes a first part 50 and a second part 60. The first part and the second part are each formed by pressing and bending from a single metal plate. As the metal plate forming the first component and the second component, a zinc alloy-plated steel sheet can be preferably used from the viewpoint of workability, durability, and the like.

第１部品５０は、第１水平面５１と気流誘導板５２と遮蔽板５４を有する。図３右側へ水平に延びる部分が、換気材の取付部４３を形成する第１水平面５１である。第１水平面の外側の側端から、下方に折曲して、垂れ壁状に気流誘導板５２が形成されている。金属板は気流誘導板の下端で内側上方に１８０度折り返され、第１水平面の下面に沿って内側に戻り、気流誘導板と間隔を開けて再び下方に折曲して、垂れ壁状に遮蔽板５４を形成する。 The first component 50 includes a first horizontal surface 51, an airflow guide plate 52, and a shield plate 54. A portion that extends horizontally to the right in FIG. 3 is a first horizontal surface 51 that forms the attachment portion 43 of the ventilation member. An airflow guide plate 52 is formed in a hanging wall shape by bending downward from the outer side edge of the first horizontal plane. The metal plate is folded upward 180 degrees inward at the lower end of the airflow guide plate, returns to the inside along the lower surface of the first horizontal plane, bends downward again at a distance from the airflow guide plate, and shields like a hanging wall. The plate 54 is formed.

第２部品６０は、第２水平面６１、内側壁６２、底壁６４、外側壁６６を有する。図３右側へ水平に延びる部分が、換気材の取付部４３を形成する第２水平面６１である。第２水平面の外側の側端から、遮蔽板５４の内側で遮蔽板と間隔を開けて、下方に折曲して内側壁６２が形成されている。内側壁の上部には、複数の内側開口６３が形成されている。内側壁の下端から外側に折曲し、遮蔽板の下方を通って、底壁６４が形成されている。底壁はほぼ水平であるが、外側に向かって低くなるように緩やかに傾斜している。底壁の外側の側端から上方に折曲して、外側壁６６が形成されている。外側壁は、本実施形態では、垂直面６６ａ、水平面６６ｂ、垂直面６６ｃの３つの部分からなる。底壁と外側壁の境界となる折曲部には、複数の水抜き穴６５が形成されている。外側壁の中ほどより上には、複数のスリット状の外側開口６７が形成されている。外側壁は、遮蔽板５４と気流誘導板５２の間に位置し、上端が第１部品５０に当接している。 The second component 60 has a second horizontal surface 61, an inner side wall 62, a bottom wall 64, and an outer side wall 66. A portion that horizontally extends to the right side in FIG. 3 is a second horizontal surface 61 that forms the ventilation member attachment portion 43. An inner side wall 62 is formed by bending downward from an outer side end of the second horizontal surface inside the shielding plate 54 with a distance from the shielding plate. A plurality of inner openings 63 are formed in the upper part of the inner wall. A bottom wall 64 is formed by bending outward from the lower end of the inner wall and passing below the shield plate. The bottom wall is almost horizontal, but gently slopes downward toward the outside. The outer wall 66 is formed by bending upward from the outer side edge of the bottom wall. In the present embodiment, the outer wall is composed of three parts, a vertical surface 66a, a horizontal surface 66b, and a vertical surface 66c. A plurality of drainage holes 65 are formed in the bent portion that is the boundary between the bottom wall and the outer wall. A plurality of slit-shaped outer openings 67 are formed above the middle of the outer wall. The outer wall is located between the shield plate 54 and the airflow guide plate 52, and the upper end is in contact with the first component 50.

第１部品と第２部品は、第１部品の第１水平面５１を上、第２部品の第２水平面６１を下にして重ね合わされ、長手方向に沿って、複数の接合部４４で点接合されている。点接合は、スポット溶接、圧入かしめなどの方法で行うことができる。 The first component and the second component are superposed with the first horizontal surface 51 of the first component being up and the second horizontal surface 61 of the second component being downward, and are point-joined at a plurality of joint portions 44 along the longitudinal direction. ing. The spot joining can be performed by a method such as spot welding or press fitting caulking.

換気材３０内に形成された通気路４２は、遮蔽板５４によって迂回させられている。すなわち、通気路は、外側開口６７と内側開口６３とを結ぶ直線の経路がないように、遮蔽板を避けて遠回りしている。これによって、外側開口から雨水が混じった空気が通気路内に進入しても、雨水は遮蔽板に当たって底壁６４上に滴下し、水抜き穴６５から排出される。したがって、雨水が内側開口６３から腰壁内部に侵入するのを抑制することができる。 The ventilation path 42 formed in the ventilation member 30 is detoured by the shielding plate 54. That is, the ventilation path makes a detour by avoiding the shielding plate so that there is no straight path connecting the outer opening 67 and the inner opening 63. As a result, even if the air mixed with rainwater enters the ventilation passage from the outer opening, the rainwater hits the shield plate and drops onto the bottom wall 64, and is discharged from the drain hole 65. Therefore, it is possible to suppress rainwater from entering the inside of the waist wall through the inner opening 63.

また、図１を参照して、気流誘導板５２の作用により、笠木と換気材の間に進入した空気の多くが通気路４２側に誘導されるので、笠木下空間１３に雨水の混じった空気が侵入することを抑制できる。 Further, referring to FIG. 1, most of the air that has entered between the headstock and the ventilation member is guided toward the ventilation path 42 by the action of the airflow guide plate 52, so that the air under the headstock 13 is mixed with rainwater. Can be suppressed.

また、図３を参照して、２つの部品５０、６０を組み合わせて換気材を構成することにより、個々の部品の折り曲げ加工は容易でありながら、全体として複雑な断面形状を実現することができる。さらに、遮蔽板５４の作用によって、第１水平面５１と第２水平面６１が重ね合わされた部分に通気路４２側から雨水が侵入しないので、第１水平面と第２水平面を点接合で接合することが可能となる。 Further, referring to FIG. 3, by constructing the ventilation member by combining the two parts 50 and 60, it is possible to realize a complicated cross-sectional shape as a whole, while bending the individual parts is easy. . Further, due to the action of the shielding plate 54, rainwater does not enter the portion where the first horizontal surface 51 and the second horizontal surface 61 are superposed from the side of the air passage 42, so that the first horizontal surface and the second horizontal surface can be joined by point bonding. It will be possible.

ところで、図１において、腰壁躯体の厚さＤは規格等で定まったものではなく、建築現場毎に異なる。腰壁躯体の厚さＤは、通し部材２０の幅と２枚の縦胴縁の厚さを合わせたものであり、一般的には、通し部材の幅は１００〜１５０ｍｍ、縦胴縁の厚さは１５〜２０ｍｍである。 By the way, in FIG. 1, the thickness D of the waist wall skeleton is not determined by a standard or the like, and differs depending on the construction site. The thickness D of the waist wall body is the sum of the width of the through member 20 and the thickness of the two vertical furring strips. Generally, the width of the through member is 100 to 150 mm, the thickness of the vertical furring strip. The length is 15 to 20 mm.

腰壁躯体幅Ｄが大きいと、図６に示すように、第１換気材３０の取付部と第２換気材３１の取付部で通し部材２０の上面を覆いきれず、第１換気材の取付部と第２換気材の取付部との間に通し部材の上面が露出する。この場合は、この通し部材が露出した部分（Ｘ）を防水テープ３２で塞ぐことができる。 When the waist wall body width D is large, as shown in FIG. 6, the upper ventilation member 20 cannot be covered with the attachment portion of the first ventilation member 30 and the attachment portion of the second ventilation member 31, and thus the attachment of the first ventilation member is prevented. The upper surface of the through member is exposed between the portion and the attachment portion of the second ventilation member. In this case, the exposed portion (X) of the through member can be closed with the waterproof tape 32.

一方、腰壁躯体幅Ｄが小さいと、図７に示すように、第１換気材３０の取付部と第２換気材３１の取付部は重なる。図７では、第１換気材の取付部が第２換気材の取付部の上に重なっている。この場合は、第１取付部の端（Ｐ）に沿って防水テープを貼ることによって、第１換気材の取付部と第２換気材の取付部との間を水密に塞ぐことができる。 On the other hand, when the waist wall body width D is small, as shown in FIG. 7, the mounting portion of the first ventilation member 30 and the mounting portion of the second ventilation member 31 overlap. In FIG. 7, the mounting portion of the first ventilation member overlaps the mounting portion of the second ventilation member. In this case, by attaching a waterproof tape along the end (P) of the first mounting portion, it is possible to seal the space between the mounting portion of the first ventilation member and the mounting portion of the second ventilation member in a watertight manner.

このように、本実施形態の構造によれば、腰壁躯体の厚さが変わっても、その上面を容易に防水することができる。さらに、一般的な腰壁の寸法を考慮すると、換気材の取付部の幅には好ましい範囲が存在する。取付部の幅とは、腰壁躯体上面に載る水平部分の幅で、図３のＬの長さをいう。 As described above, according to the structure of the present embodiment, even if the thickness of the waist wall body is changed, the upper surface thereof can be easily waterproofed. Further, in consideration of the size of the general waist wall, there is a preferable range for the width of the attachment portion of the ventilation member. The width of the attachment portion is the width of the horizontal portion on the upper surface of the waist wall body, and refers to the length L of FIG.

取付部の幅Ｌが小さすぎると、通し部材上面のうち、金属製の取付部より耐久性の劣る防水テープのみで覆われる部分の割合が大きくなるし、防水テープの端が雨水の侵入しやすい腰壁の端近くに位置することになるので、好ましくない。上記一般的な通し部材の幅と縦胴縁の厚さを考慮すると、取付部の幅Ｌは好ましくは４０ｍｍ以上であり、さらに好ましくは５５ｍｍ以上である。一方、取付部の幅が大きすぎると、材料を多く使うためコスト高となり、好ましくない。同じく、上記一般的な通し部材の幅と縦胴縁の厚さを考慮すると、取付部の幅は好ましくは１００ｍｍ以下であり、さらに好ましくは８０ｍｍ以下である。 If the width L of the mounting portion is too small, the ratio of the portion of the upper surface of the through member that is covered only by the waterproof tape, which is inferior in durability to the metallic mounting portion, becomes large, and the edge of the waterproof tape easily penetrates rainwater. Since it is located near the edge of the waist wall, it is not preferable. Considering the width of the general through member and the thickness of the vertical furring strip, the width L of the mounting portion is preferably 40 mm or more, more preferably 55 mm or more. On the other hand, if the width of the mounting portion is too large, a large amount of material is used, resulting in high cost, which is not preferable. Similarly, in consideration of the width of the general through member and the thickness of the vertical furring strip, the width of the mounting portion is preferably 100 mm or less, more preferably 80 mm or less.

また、図７において、換気材の取付部は、他の換気材の取付部との重なり部分が嵩張らないよう、端に向かって徐々に薄くなるように形成されることが好ましい。本実施形態では、第１水平面５１と第２水平面６１の端がずれていることによって、取付部先端が薄く形成されている。具体的には、図３において、当該ずれ（Ｓ）が好ましくは２ｍｍ以上であり、さらに好ましくは４ｍｍ以上である。 Further, in FIG. 7, it is preferable that the ventilation member mounting portion is formed so as to gradually become thinner toward the end so that an overlapping portion with another ventilation material mounting portion is not bulky. In the present embodiment, the ends of the first horizontal surface 51 and the second horizontal surface 61 are offset from each other, so that the tip of the mounting portion is formed thin. Specifically, in FIG. 3, the shift (S) is preferably 2 mm or more, and more preferably 4 mm or more.

次に、本実施形態の換気構造の施工手順を図５に基づいて説明する。 Next, a procedure for constructing the ventilation structure of this embodiment will be described with reference to FIG.

施工手順は次のとおりである。
図５Ａは、図４に示した腰壁の躯体１１を示している。
図５Ｂにおいて、縦胴縁２２に外装材２３を固定し、外装材の上端に片ハットジョイナー３６をセットする。
図５Ｃにおいて、躯体上部の両側から、第１換気材３０および第２換気材３１をセットし、第１および第２換気材の取付部の間を防水テープ３２で塞ぐ。このとき、第１および第２換気材は、ビス等により通し部材２０上面に固定しておいてもよい。
図５Ｄにおいて、第１換気材の取付部、第２換気材の取付部および防水テープを、笠木取付部材３３で上から押さえて、笠木取付部材をビス３４等で通し部材に固定する。
図５Ｅにおいて、換気材３０、３１と外装材２３の上端との間を不定形シーリング材３７で水密にシールする。
図５Ｆにおいて、笠木取付部材に笠木３５を係止する。 The construction procedure is as follows.
5A shows the body 11 of the waist wall shown in FIG.
In FIG. 5B, the exterior material 23 is fixed to the vertical furring strip 22, and the one-hat joiner 36 is set on the upper end of the exterior material.
In FIG. 5C, the first ventilation member 30 and the second ventilation member 31 are set from both sides of the upper part of the skeleton, and the waterproof tape 32 closes between the attachment portions of the first and second ventilation members. At this time, the first and second ventilation members may be fixed to the upper surface of the through member 20 with screws or the like.
In FIG. 5D, the mounting portion of the first ventilation member, the mounting portion of the second ventilation member, and the waterproof tape are pressed from above by the head mounting member 33, and the head mounting member is fixed to the threaded member with screws 34 or the like.
In FIG. 5E, the irregular sealing material 37 seals between the ventilation members 30 and 31 and the upper end of the exterior member 23 in a watertight manner.
In FIG. 5F, the headstock 35 is locked to the headboard attachment member.

このように、本実施形態の構造によれば、腰壁躯体の寸法に依らず、同じ方法で、容易に施工を行うことができる。 As described above, according to the structure of the present embodiment, the construction can be easily performed by the same method regardless of the size of the waist wall skeleton.

本発明は上記の実施形態に限定されるものではなく、その技術的思想の範囲内で種々の変形が可能である。 The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the technical idea thereof.

例えば、腰壁躯体の構造は上記実施形態には限られない。一例として、腰壁躯体は、通し部材の側面に内部壁材を固定して、その外面に縦胴縁を配置してもよい。あるいは、図８に示すように、通し部材の上面に横通気胴縁２８を介して天端材２９を配置してもよい。その場合は、腰壁躯体上面を形成する天端材の両側に換気材を配置すればよい。 For example, the structure of the waist wall structure is not limited to the above embodiment. As an example, in the waist wall body, the inner wall member may be fixed to the side surface of the through member, and the vertical furring strip may be arranged on the outer surface thereof. Alternatively, as shown in FIG. 8, a top end material 29 may be arranged on the upper surface of the through member via the lateral ventilation furring strip 28. In that case, ventilation materials may be arranged on both sides of the top end material forming the upper surface of the waist wall body.

１０換気構造
１１腰壁の躯体
１２腰壁内部空間
１３笠木下空間
２０通し部材
２１間柱
２２縦胴縁
２３外装材
２８横通気胴縁
２９天端材
３０第１換気材
３１第２換気材
３２防水テープ（防水材）
３３笠木取付部材
３４ビス
３５笠木
３６片ハットジョイナー
３７不定形シーリング材
４１通気部
４２通気路
４３取付部
４４接合部
５０第１部品
５１第１水平面
５２気流誘導板
５４遮蔽板
６０第２部品
６１第２水平部
６２内側壁
６３内側開口
６４底壁
６５水抜き穴
６６外側壁
６７外側開口 10 Ventilation structure 11 Body of waist wall 12 Waist wall inner space 13 Undergrowth space 20 Through member 21 Stud 22 Vertical furring strip 23 Exterior material 28 Side ventilation furring strip 29 Top end material 30 First ventilation material 31 Second ventilation material 32 Waterproofing Tape (waterproof material)
33 Kasagi mounting member 34 Screw 35 Kasagi 36 One-sided hat joiner 37 Irregularly shaped sealing material 41 Ventilation part 42 Ventilation path 43 Mounting part 44 Joint part 50 First part 51 First horizontal surface 52 Airflow guide plate 54 Shielding plate 60 Second part 61st 2 Horizontal part 62 Inner side wall 63 Inner opening 64 Bottom wall 65 Drain hole 66 Outer side wall 67 Outer opening

Claims

腰壁躯体上部の厚さ方向の両側に沿って配置され、それぞれ、前記腰壁内部と外部を連通する通気路が形成された通気部と該通気部から突出する平板状の取付部とを有し、該取付部が前記腰壁躯体上面に固定された第１および第２の換気材と、
前記第１換気材の取付部および前記第２換気材の取付部を上から覆い、前記第１換気材の取付部と前記第２換気材の取付部との間を水密に塞ぐ防水材と、
前記第１換気材の取付部、前記第２換気材の取付部および前記防水材を介して前記腰壁躯体上面に固定された笠木取付部材と、
前記笠木取付部材に係止され、前記第１換気材の側方から前記笠木取付部材の上方を経て前記第２換気材の側方までを連続して覆う笠木と、
を有する建築物の換気構造。 A ventilation part, which is arranged along both sides in the thickness direction of the upper part of the waist wall structure, has a ventilation path that communicates the inside and outside of the waist wall, and a flat plate-shaped mounting part protruding from the ventilation part. And a first and a second ventilation member having the mounting portion fixed to the upper surface of the waist wall body,
A waterproof material that covers the mounting portion of the first ventilation member and the mounting portion of the second ventilation member from above, and that seals between the mounting portion of the first ventilation member and the mounting portion of the second ventilation member in a watertight manner;
A mounting member fixed to the upper surface of the waist wall body through the first ventilation member mounting portion, the second ventilation member mounting portion, and the waterproof material;
A head tree that is locked to the head board mounting member and continuously covers from a side of the first ventilation member to a side of the second ventilation member through an upper side of the head member mounting member,
Ventilation structure of a building having.

前記第１換気材の通気部および／または前記第２換気材の通気部は、
外部空間に面して形成された外側開口と、
前記腰壁の内部空間に面して形成された内側開口とを有し、
前記外側開口から前記内側開口に通ずる前記通気路の途中に、該通気路を迂回させる遮蔽部をさらに有する、
請求項１に記載の建築物の換気構造。 The ventilation part of the first ventilation member and / or the ventilation part of the second ventilation member,
An outer opening formed facing the external space,
An inner opening formed facing the inner space of the waist wall,
In the middle of the air passage that leads from the outer opening to the inner opening, a shielding portion that bypasses the air passage is further provided.
The ventilation structure for a building according to claim 1.

前記第１換気材および／または前記第２換気材は、
前記外側開口の外部空間側に気流誘導部を有する、
請求項２に記載の建築物の換気構造。 The first ventilation material and / or the second ventilation material,
An air flow guide is provided on the outer space side of the outer opening,
The ventilation structure for a building according to claim 2.

腰壁躯体上部の厚さ方向の両側に沿って配置され、それぞれ、前記腰壁内部と外部を連通する通気路が形成された通気部と該通気部から突出する平板状の取付部とを有し、該取付部が前記腰壁躯体上面に固定された第１および第２の換気材と、
前記第１換気材の取付部と前記第２換気材の取付部との間を水密に塞ぐ防水材と、
前記第１換気材の取付部、前記第２換気材の取付部および前記防水材を介して前記腰壁躯体上面に固定された笠木取付部材と、
前記笠木取付部材に係止され、前記第１換気材および前記第２換気材と空間を隔てて、前記第１換気材の側方から前記笠木取付部材の上方を経て前記第２換気材の側方までを連続して覆う笠木とを有し、
前記第１換気材の通気部および／または前記第２換気材の通気部は、
外部空間に面して形成された外側開口と、
前記腰壁の内部空間に面して形成された内側開口と
前記外側開口から前記内側開口に通ずる前記通気路の途中に、該通気路を迂回させる遮蔽部と、
前記外側開口の外部空間側で前記笠木との間に、前記笠木および前記外側開口とそれぞれ空間を隔てて、該外側開口と空間を隔てて該外側開口を覆うように設けられた気流誘導部を有する、
建築物の換気構造。 A ventilation part, which is arranged along both sides in the thickness direction of the upper part of the waist wall structure, has a ventilation path that communicates the inside and outside of the waist wall, and a flat plate-shaped mounting part protruding from the ventilation part. And a first and a second ventilation member having the mounting portion fixed to the upper surface of the waist wall body,
A waterproof material that watertightly seals between the mounting portion of the first ventilation member and the mounting portion of the second ventilation member;
A mounting member fixed to the upper surface of the waist wall body through the first ventilation member mounting portion, the second ventilation member mounting portion, and the waterproof material;
The side of the second ventilation member is locked to the head member and is separated from the first ventilation member and the second ventilation member by a space to pass from the side of the first ventilation member to above the head member. It has Kasagi that continuously covers up to
The ventilation part of the first ventilation member and / or the ventilation part of the second ventilation member,
An outer opening formed facing the external space,
An inner opening formed facing the inner space of the waist wall, and a shield part that bypasses the air passage in the middle of the air passage that leads from the outer opening to the inner opening,
An airflow guide portion is provided between the head opening and the outer space on the outer space side of the outer opening to separate the head opening and the outer opening from each other and to cover the outer opening with a space therebetween. Have,
Ventilation structure of buildings.

前記第１換気材および／または前記第２換気材は、第１部品と第２部品とを有し、
前記第１部品は、
第１水平面と、
前記第１水平面の一側端から下方に折曲して、垂れ壁状に形成された気流誘導板と、
前記気流誘導板の前記第１水平面側に間隔を開けて、垂れ壁状に形成された遮蔽板とを有し、
前記第２部品は、
第２水平面と、
前記第２水平面の一側端から下方に折曲して、前記遮蔽板の前記取付部側に形成され、前記内側開口が形成された内側壁と、
前記内側壁の下端から折曲して形成され、前記遮蔽板の下方に位置する底壁と、
前記底壁の前記内側壁と反対の側端から上方に折曲して形成され、前記遮蔽板と前記気流誘導板の間に位置し、前記外側開口が形成された外側壁とを有し、
前記底壁と前記外側壁の境界となる折曲部に水抜き穴が形成されており、
前記第１部品と前記第２部品は、前記第１水平面を上、前記第２水平面を下にして重ね合わされて、平板状の前記取付部を形成する、
請求項３または４に記載の建築物の換気構造。 The first ventilation member and / or the second ventilation member has a first part and a second part,
The first component is
A first horizontal plane,
An airflow guide plate that is bent downward from one side end of the first horizontal plane and is formed in a hanging wall shape;
A shield plate formed in the shape of a hanging wall with an interval on the first horizontal surface side of the airflow guide plate,
The second component is
A second horizontal plane,
An inner wall formed by bending the one side end of the second horizontal surface downward and forming the inner opening on the mounting portion side of the shielding plate;
A bottom wall formed by bending from the lower end of the inner wall, and located below the shielding plate;
It is formed by bending upward from a side end opposite to the inner wall of the bottom wall, is located between the shielding plate and the airflow guide plate, and has an outer wall in which the outer opening is formed,
A drainage hole is formed in a bent portion that is a boundary between the bottom wall and the outer wall,
The first component and the second component are stacked with the first horizontal surface facing upward and the second horizontal surface facing downward to form the flat plate-shaped mounting portion,
A ventilation structure for a building according to claim 3 or 4.

前記第１水平面と前記第２水平面は、重ね合わされた部分の複数の箇所で点接合されている、
請求項５に記載の建築物の換気構造。 The first horizontal plane and the second horizontal plane are point-joined at a plurality of positions in the overlapped portion,
The ventilation structure for buildings according to claim 5.

前記腰壁躯体は、長手方向に間隔をおいて設けられた間柱と、該間柱の上面に水平に架け渡された通し部材と、長手方向に間隔をおいて該通し部材の側面に固定された縦胴縁と、該縦胴縁に固定された外装材とを有し、
前記通気路は、前記外装材および前記通し部材とに囲まれる空間と外部とを連通する、
請求項１〜６のいずれか一項に記載の建築物の換気構造。 The waist wall frame body is fixed to the studs provided at intervals in the longitudinal direction, the through member horizontally spanning the upper surface of the stud, and the side surface of the through member at an interval in the longitudinal direction. Having a vertical furring strip and an exterior material fixed to the vertical furring strip,
The ventilation passage communicates a space surrounded by the exterior material and the through member with the outside,
A ventilation structure for a building according to any one of claims 1 to 6.

前記腰壁躯体は、長手方向に間隔をおいて設けられた間柱と、該間柱の上面に水平に架け渡された通し部材と、該通し部材の側面に固定された内部壁材と、該内部壁材の外面に配置された縦胴縁と、該縦胴縁に固定された外装材とを有し、
前記通気路は、前記外装材および前記内部壁材とに囲まれる空間と外部とを連通する、
請求項１〜６のいずれか一項に記載の建築物の換気構造。 The waist wall structure includes studs provided at intervals in a longitudinal direction, a through member horizontally spanning an upper surface of the stud, an inner wall member fixed to a side surface of the through member, and the inside. A vertical furring arranged on the outer surface of the wall material, and an exterior material fixed to the vertical furring,
The ventilation passage communicates a space surrounded by the exterior material and the inner wall material with the outside.
A ventilation structure for a building according to any one of claims 1 to 6.

断面がほぼ一様な長尺物であって、
第１部品と第２部品とを有し、
前記第１部品は、
第１水平面と、
前記第１水平面の一側端から下方に折曲して、垂れ壁状に形成された気流誘導板と、
前記気流誘導板の前記第１水平面側に間隔を開けて、垂れ壁状に形成された遮蔽板とを有し、
前記第２部品は、
第２水平面と、
前記第２水平面の一側端から下方に折曲して、前記遮蔽板の取付部側に形成され、内側開口が形成された内側壁と、
前記内側壁の下端から折曲して形成され、前記遮蔽板の下方に位置する底壁と、
前記底壁の前記内側壁と反対の側端から上方に折曲して形成され、前記遮蔽板と前記気流誘導板の間に位置し、前記遮蔽板および前記気流誘導板とそれぞれ空間を隔てて外側開口が形成された外側壁とを有し、
前記底壁と前記外側壁の境界となる折曲部に水抜き穴が形成されており、
前記第１部品と前記第２部品は、前記第１水平面を上、前記第２水平面を下にして重ね合わされて接合された、
換気材。 A long object with a substantially uniform cross section,
Has a first part and a second part,
The first component is
A first horizontal plane,
An airflow guide plate that is bent downward from one side end of the first horizontal plane and is formed in a hanging wall shape;
A shield plate formed in the shape of a hanging wall with an interval on the first horizontal surface side of the airflow guide plate,
The second component is
A second horizontal plane,
By bending downward from one end of the second horizontal surface, is formed on preparative mounting portion side of the shielding plate, an inner wall inside opening is formed,
A bottom wall formed by bending from the lower end of the inner wall, and located below the shielding plate;
It is formed by bending upward from a side end of the bottom wall opposite to the inner wall, is located between the shield plate and the airflow guide plate, and has an outer opening with a space between the shield plate and the airflow guide plate. And an outer wall formed with
A drainage hole is formed in a bent portion that is a boundary between the bottom wall and the outer wall,
The first part and the second part are overlapped and joined with the first horizontal surface facing upward and the second horizontal surface facing downward.
Ventilation material.