JP3738874B2

JP3738874B2 - Ventilation building

Info

Publication number: JP3738874B2
Application number: JP01375599A
Authority: JP
Inventors: 一男池田; 吉久山本; 達哉藤原
Original assignee: 住友金属建材株式会社
Priority date: 1999-01-22
Filing date: 1999-01-22
Publication date: 2006-01-25
Anticipated expiration: 2019-01-22
Also published as: JP2000213128A

Description

【０００１】
【発明の属する技術分野】
本発明は建物の屋根棟部に設置される換気棟に関する。
【０００２】
【従来の技術】
最近の住宅や大型の建築物においては、小屋裏の換気不良による野地板、垂木等の屋根構体の腐食を防止することを目的として、屋根の棟を利用して小屋裏の換気を行う換気棟（換気装置）が設置されることが多くなってきている。
【０００３】
この種の換気棟としては、特開平６−２６４５７８号公報に見られるように、屋根の棟に合わせて加工された断面山形の棟板（金属折板）の上面に換気口を設けるとともに、その換気口の下方に水切板を設けた構造のものがある。このような換気棟において、棟板の上面の換気口から雨水が浸入した場合、その雨水は水切板に沿って下方に流れ、棟板下部（換気口下部）に設けた排水口から外部に排水されるようになっている。
【０００４】
【発明が解決しようとする課題】
ところで、この種の換気棟は、棟板の上面に沿って流れる気流により棟板表面に生じる負圧によって、小屋裏の空気を換気口を通じて外部へと引き出すというメカニズムにより換気を行う方式となっているが、前記した構造の換気棟では、棟板の下部に排水口が設けられているため、その排水口への外気の入り込みにより、換気棟内部（棟板裏面空間）と外部との差圧が小さくなってしまい、十分な換気効果が得られないという問題がある。
【０００５】
また、従来の換気棟によれば、台風時の暴風雨等により、横なぐりの雨が換気棟に吹きつけたときには、棟板に設けた換気口（または排水口）から雨水が小屋裏内に浸入する可能性があるという問題もある。
【０００６】
本発明はそのような実情に鑑みてなされたもので、換気効率が良く、しかも小屋裏に雨水が浸入する可能性が少ない構造の換気棟の提供を目的とする。
【０００７】
【課題を解決するための手段】
上記の目的を達成するため、本発明の換気棟は、短手方向の中央部に断面山形に折り曲げ加工された上板を有し、該上板の短手方向の両側縁にそれぞれ外方に凸となる断面略く字形の側板が一体形成されて、該側板の下端に上向きの折返し片が形成されてなる棟板と、上記棟板と略等しい全長を有して、上記棟板の上板裏面及び折返し片に固定されることにより上記棟板を下側から建物の棟木に支持固定する支持板と、棟板の上板裏面両側部に取り付けられ、棟板の短手方向両側部に向けて下降傾斜する水切板とを備え、上記棟板における両側板の上部近傍と上記支持板の上部近傍には、矩形スリット状の換気口が棟板の長手方向に沿って一定のピッチで複数個設けられるとともに、棟板の両側板に形成された上記換気口の直下に上記水切板が配置される一方、棟板の長手方向の両端部には上記換気口が設けられず、両側板の下部及び折返し片の両端部に水抜き用の切欠きが形成されて、この切欠きが棟板の長手方向両端部を塞ぐ妻板によって覆われることによって特徴づけられる。
【０００８】
本発明の換気棟によれば、棟板の換気口の下方には水抜き穴等の開口部を設けずに、棟板の両端部に水抜き用の切欠きを設けており、しかも、その水抜き用の切欠きは、棟板端部に取り付ける妻板によって覆われるので、棟板に風が作用した際に換気棟内に入り込む風が殆どなくなる。これにより、棟板の上面に沿って流れる風により生じる負圧と、換気棟内部（棟板裏面空間）との差圧が大きくなる結果、換気効率が従来よりも向上する。
【０００９】
さらに、棟板の側板が外方に凸の断面く字形となっているので、側板が整流板の役目を果たし、棟板に対して横から風が作用した際に、棟板の上板への風の回り込みがスムーズ（流速大）となるので、棟板の上面に生じる負圧がより大きくなる。
【００１０】
ここで、本発明の換気棟において、換気口から雨水が浸入しても、その雨水は水切板を伝って棟板の側板下部に落下して、その位置に溜まるか、あるいは棟板両端部の切欠きから外部に流出するので、小屋裏内に浸入する可能性は殆どなくなる。
【００１１】
【発明の実施の形態】
本発明の実施の形態を、以下、図面に基づいて説明する。
【００１２】
本実施の形態の換気棟は、図１〜図４に示すように、棟板１、支持板２、水切板３、妻板４及び接続部水切板５などを主体として構成されている。
【００１３】
棟板１は、図３〜図６に示すように、鋼板等の金属板材（例えば板厚０．５ｍｍ）を折り曲げ加工した折板で、断面山形の上板１１の両側縁に断面く字形の側板１２（外方に凸）が一体形成されている。側板１２の下端は上方に向けて折り返されており、この折返し片１３に、後述する支持板２の取付け片２３がリベット止め等により固定される。棟板１の両側縁の側板１２及び折返し片１３の両端部は切欠かれており、その各切欠き１ｂを通じて、側板１２の下部（側板１２と折返し片１３の角部）に溜まる雨水等を外部に逃がすことができる。
【００１４】
棟板１の上板１１は、中央頂部から両側（屋根面側）に向けて等角度で折り曲げられており、両側部に折り角度を更に大きくした下り棟部１１０が設けられている。下り棟部１１０には複数個（７個）の換気口１ａが、棟板１の長手方向に沿って一定のピッチで加工されている（図１、図２参照）。これら換気口１ａは矩形スリット状の開口で側板１２の上側折曲部の近傍に設けられている。
【００１５】
なお、棟板１の端部には換気口１ａは設けておらず、妻板４の取り付けを考慮して、棟板１の端面から１つ目の換気口１ａの縁部までの間に例えば１００ｍｍ程度の間隔をあけている。
【００１６】
支持板２は、鋼板等の金属板材（例えば板厚０．５ｍｍ）を折り曲げ加工した折板で、図３及び図４に示すように、棟板１の上板裏面に固定される固定片２１と、固定片２１の端部から外側下方に向けて折り返された傾斜片２２と、傾斜片２２の端部から下方に略９０°で折れ曲がる取付け片２３と、取付け片２３の下端から斜め外方に向けて突出するスカート片２４とが一体形成されている。この支持板２の長さは棟板１の全長と略等しい。
【００１７】
支持板２には、図２に示すように、傾斜片２２の上部（固定片２１との折曲部近傍）に、複数個の換気口２ａが長手方向に沿って一定のピッチで加工されている。この支持板２の換気口２ａは、棟板１に設けた換気口１ａと略同形状（矩形スリット状）に加工されており、また、配置ピッチは棟板１の換気口１ａのピッチに対応している。
【００１８】
以上の支持板２は、棟板１の両側部に設けられ、各固定片２１を棟板１の上板裏面に、また各取付け片２３を棟板１の折返し片１３にそれぞれリベット止めすることによって棟板１に固定されている。そして、支持板２の取付り片２３を、図３に示すように、小屋の棟木７にビス止めすることによって、換気棟を建物に取り付けることができる。
【００１９】
水切板３は、図３及び図４に示すように、鋼板等の金属板材（例えば板厚０．５ｍｍ）を折り曲げ加工した折板で、棟板１の裏面にリベット止め等により固定される固定片３１と、固定片３１の端部から斜め下方に延びる傾斜片３２と、傾斜片３２の下端から垂下する垂下片３３とによって構成されており、棟板１（下り棟部１１０の裏面）への固定状態で、傾斜片３２が、棟板１の換気口１ａの直下に位置する。
【００２０】
妻板４は、図４及び図７〜図１０に示すように、鋼板等の金属板材（例えば板厚０．５ｍｍ）の折り曲げ加工品で、棟板１の端部を覆う形状に加工された断面山形のカバー４１と、カバー４１の側面の片方を塞ぐ側板４２と、断面山形に加工された内板４３とによって構成されている。カバー４１の両側下端は、妻板４を棟板１の端部に取り付けた状態で、支持板２のスカート片２４の上面近傍に位置し、このカバー４１によって棟板１端部の切欠き１ｂの前面側が覆われる。
【００２１】
また、カバー４１の下端部側面（側板４２と反対側の面）には、棟板１の側板１２と支持板２のスカート片２４との間にできる隙間を塞ぐための塞ぎ板４４が設けられている。ただし、カバー４１の両側下端面は開口されており、その開口部４ａを通じて、棟板１の側板１２下部に溜まる雨水等を外部に逃がすことができる。
【００２２】
妻板４は、図４及び図１１に示すように、カバー４１の頂部を境として左右に分割されており、その一方の分割体１０４のカバー及び側板がそれぞれカバー４１の頂部を超えて他方の分割体２０４側に延出し、また他方の分割体２０４の内板が頂部を超えて一方の分割体１０４側に延出し、それら延出部１４１，１４２及び延出部２４３が、それぞれ他方の分割体２０４または一方の分割体１０４の内面に重なり合っており、この一対の分割体１０４，２０４をカバー４１の頂部を中心として揺動させることが可能な構造となっている。従って、妻板４は、一対の分割体１０４，２０４の揺動により、頂部の折り角度をある程度の範囲で任意に調節することができる。
【００２３】
なお、以上では換気棟の接続部に設ける妻板の構造を示したが、屋根の棟の端部に設置する換気棟の端部（接続を行わない端部）に取り付ける妻板としては、例えば図７に示した妻板において内板４３がなく、カバー４１の一方の側面の全面に側板が形成されたものを使用する。
【００２４】
接続部水切板５は、建物の棟に連設される換気棟の接続部分の雨仕舞いに用いる部材で、図１１に示すように、鋼板等の金属板材（例えば板厚０．５ｍｍ）の折り曲げ加工により製作された短尺品（幅寸法＝１５０ｍｍ〜２００ｍｍ程度）である。
【００２５】
接続部水切板５は、断面山形に加工された山形片５１と、山形片５１の両端下部からそれぞれ下方に略９０°で立ち下がる垂直片５２と、垂直片５２の各下端から斜め外方に向けて突出するスカート片５３とが一体形成されており、換気棟の接続部への装着状態で一対の支持片２間に嵌まり込み、山形片５１、垂直片５２及びスカート片５３がそれぞれ支持片２の傾斜片２２、取付け片２３及びスカート片２４に当たる（図４参照）。
【００２６】
なお、本実施の形態では、以上の構成に加えて、棟板１の換気口１ａから入った虫やごみなどが小屋裏に侵入することを防止するため、棟板１の裏面側に防虫網６を設けている。
【００２７】
以上の構造の本実施の形態によれば、棟板１の上面に生じる負圧によって、小屋裏の空気が支持板２の換気口２ａ及び棟板１の換気口１ａを通じて外部に排気され（図３）、小屋裏の換気が効率良く行われる。
【００２８】
また、棟板１の側板１２が外方に凸の断面く字形となっているので、棟板１に対して横方向から風が作用した際に、棟板１の上板１１への風の回り込みがスムーズ（流速大）となるので、棟板１の上面に生じる負圧がより大きくなる。しかも、換気口１ａは上板１１に回り込む風が最大となる位置すなわち側板１２の上側折曲部の近傍位置に設けているので、より高い排気（換気）力を得ることができる。また、棟板１の上板１１への風の回り込みがスムーズになることから、風下側の換気口１ａでの換気効率も向上する。
【００２９】
本実施の形態において、棟板１の換気口１ａから雨水が浸入した場合、図３及び図４に示すように、その雨水は水切板３に沿って流れ、側板１２の下部に落下して、その位置に溜まるか、あるいは棟板１両端の切欠き１ｂから外部に流出する。しかも、本実施の形態では、棟板１を支持する支持板２を、上板１１の裏面にまで延長しているので、側板１２の下部に雨水が溜まった場合であっても、支持板２の取付け片２３及び傾斜片２２が水返し板の役目を果たすので、小屋裏に雨水が浸水することを確実に防止することができる。
【００３０】
ここで、本実施の形態によれば、棟板１が板厚０．５ｍｍ程度の金属板（例えば鋼板）であることから、図１２に示すように、棟板１の頂部Ｐを中心として全体を撓ませることにより、棟板１の頂部の折り角度を変化させることが可能である。従って、換気棟を設置する建物によって棟の角度（屋根勾配）が違っていても、１種の換気棟で対応できるという利点がある。なお、妻板４については、先に述べたように、一対の分割体１０４，２０４の合わせ構造とし、これら分割体１０４，２０４の揺動によりカバー４１の頂部の折り角度を任意に調節できる構造とすることによって、各建物の屋根勾配に対応できるようにしている。
【００３１】
【発明の効果】
以上説明したように、本発明の換気棟によれば、棟板に設けた換気口から浸入した雨水を、棟板の両端に設けた水逃がし用の切欠きから外部に排水する構造とするとともに、その水逃がし用の切欠きを妻板で覆っているので、換気棟内部に風が入り込み難くなり、これにより小屋内部と棟板上面との間の差圧が大きくなる結果、換気効率が従来よりも高くなる。しかも、棟板の換気口の下方に水切板を設けているので、換気口から入り込んだ雨水が小屋裏に浸入することを確実に防止することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態の平面図（Ａ）及び側面図（Ｂ）である。
【図２】図１のＣ−Ｃ断面図である。
【図３】図１のＤ−Ｄ断面図である。
【図４】図１のＥ−Ｅ断面図である。
【図５】本発明の実施の形態に使用する棟板の側面図である。
【図６】図５のＦ−Ｆ断面図である。
【図７】本発明の実施の形態に使用する妻板の正面図（Ａ）及び平面図（Ｂ）である。
【図８】妻板の側面図である。
【図９】図７のＧ−Ｇ断面図である。
【図１０】図７のＨ矢視図である。
【図１１】本発明の実施の形態に使用する接続部水切板の正面図（Ａ）及び平面図（Ｂ）である。
【図１２】本発明の実施の形態の作用説明図である。
【符号の説明】
１棟板
１ａ換気口
１ｂ切欠き（水逃がし用）
１１上板
１１０下り棟部
１２側板
１３折返し片
２支持板
２ａ換気口
２１固定片
２２傾斜片
２３取付け片
２４スカート片
３水切板
３１固定片
３２傾斜片
３３垂下片
４妻板
４ａ開口部
４１カバー
４２側板
４３内板
４４塞ぎ板
５接続部水切板
５１山形片
５２垂直片
５３スカート片
６防虫網
７棟木[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ventilation building installed in a roof ridge portion of a building.
[0002]
[Prior art]
In recent residences and large buildings, a ventilation building that uses the roof ridge to ventilate the attic to prevent corrosion of roof structures such as field boards and rafters due to poor ventilation in the attic. (Ventilators) are often installed.
[0003]
As this type of ventilation building, as seen in Japanese Patent Application Laid-Open No. 6-264578, a ventilation port is provided on the upper surface of a mountain-shaped building board (metal folded board) processed to match the roof building, There is a structure with a drainage plate below the vent. In such a ventilation building, when rainwater enters from the ventilation port on the top surface of the building board, the rainwater flows downward along the drainage board and drains to the outside from the drainage port provided at the lower part of the building board (lower ventilation port). It has come to be.
[0004]
[Problems to be solved by the invention]
By the way, this type of ventilation building is a system that ventilates by a mechanism that draws out the air behind the shed to the outside through the ventilation port by the negative pressure generated on the surface of the building board due to the airflow flowing along the upper surface of the building board. However, in the ventilation building with the structure described above, a drainage port is provided at the lower part of the building board, so that the pressure difference between the inside of the ventilation building (the space behind the building board) and the outside due to the entry of outside air into the drainage port. However, there is a problem that sufficient ventilation effect cannot be obtained.
[0005]
In addition, according to the conventional ventilation building, rainwater infiltrates into the back of the hut from the ventilation port (or drainage port) provided on the ridgeboard when the rain from the side blows to the ventilation building due to storms during a typhoon. There is also the problem that there is a possibility of doing.
[0006]
The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a ventilation wing having a structure with good ventilation efficiency and a low possibility of rainwater entering the back of a hut.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the ventilation building of the present invention has an upper plate that is bent into a mountain shape in the center in the short direction, and outwards on both side edges of the upper plate in the short direction. A side plate having a generally rectangular shape with a convex cross section is formed integrally, and an upward folded piece is formed at the lower end of the side plate, and has a total length substantially equal to the above-mentioned building plate, It is fixed to the back of the board and the folded piece so that the above-mentioned ridge board is supported and fixed to the ridge of the building from the bottom, and is attached to both sides of the upper board on the back side of the ridge board. and a water-shielding plate inclined downward toward, near the top of the upper neighborhood and the support plate of the side plates in the building plate, a plurality at a constant pitch rectangular slit-shaped ventilation openings along the longitudinal direction of the ridge plate pieces provided Rutotomoni, the water-shielding plate directly below the ventilation opening formed in the side plates of the building plate While placed Ru, the ventilation opening is not provided on the both ends in the longitudinal direction of the ridge board, are notches formed for drainage at both ends of the lower and folded piece of side plates, the notches building It is characterized by being covered by a gable plate that closes both longitudinal ends of the plate .
[0008]
According to the ventilation building of the present invention, the opening of the drainage board or the like is not provided below the ventilation opening of the building board, but the notch for draining is provided at both ends of the building board, and the Since the notch for draining is covered with a gable plate attached to the edge of the ridge board, there is almost no wind entering the ventilation ridge when wind acts on the ridge board. As a result, the differential pressure between the negative pressure generated by the wind flowing along the upper surface of the building board and the inside of the ventilation building (building board rear surface space) increases, resulting in improved ventilation efficiency.
[0009]
Furthermore, the side plate of the building board has an outwardly convex cross-sectional shape, so that the side plate serves as a rectifying plate, and when the wind acts on the building board from the side, to the upper board of the building board Since the wind circulates smoothly (large flow velocity), the negative pressure generated on the upper surface of the building board becomes larger.
[0010]
Here, in the ventilation building of the present invention, even if rainwater enters from the ventilation opening, the rainwater flows down the drainage board to the lower part of the side plate of the building board and accumulates at that position, or at both ends of the building board. Since it flows out from the notch, there is almost no possibility of entering the back of the hut.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
As shown in FIGS. 1 to 4, the ventilation wing of the present embodiment is mainly configured by a ridge board 1, a support board 2, a draining board 3, a wife board 4, a connection part draining board 5, and the like.
[0013]
As shown in FIGS. 3 to 6, the ridge board 1 is a folded plate obtained by bending a metal plate material (for example, a plate thickness of 0.5 mm) such as a steel plate, and has a square cross section on both side edges of the upper plate 11 having a cross section. The side plate 12 (projecting outward) is integrally formed. A lower end of the side plate 12 is folded upward, and a mounting piece 23 of the support plate 2 described later is fixed to the folded piece 13 by riveting or the like. Both end portions of the side plate 12 and the folded piece 13 on both side edges of the building board 1 are notched, and rainwater or the like accumulated in the lower part of the side plate 12 (corner portions of the side plate 12 and the folded piece 13) is externally provided through the notches 1b. Can escape.
[0014]
The upper plate 11 of the building board 1 is bent at an equal angle from the central top part to both sides (roof surface side), and a descending building part 110 having a larger folding angle is provided on both side parts. A plurality (seven) ventilation openings 1a are machined in the descending ridge portion 110 at a constant pitch along the longitudinal direction of the ridge board 1 (see FIGS. 1 and 2). These ventilation openings 1 a are rectangular slit-shaped openings and are provided in the vicinity of the upper bent portion of the side plate 12.
[0015]
In addition, the ventilation port 1a is not provided in the edge part of the ridge board 1, and it considers attachment of the end plate 4, and is 100 mm from the edge surface of the ridge board 1 to the edge part of the 1st ventilation hole 1a, for example. There is an interval of about.
[0016]
The support plate 2 is a folded plate obtained by bending a metal plate material such as a steel plate (for example, a plate thickness of 0.5 mm), and as shown in FIGS. 3 and 4, a fixing piece 21 fixed to the back surface of the upper plate of the building plate 1. And an inclined piece 22 folded back outwardly from the end of the fixed piece 21, an attachment piece 23 that bends downward from the end of the inclined piece 22 at approximately 90 °, and an obliquely outward from the lower end of the attachment piece 23. A skirt piece 24 projecting toward is integrally formed. The length of the support plate 2 is substantially equal to the total length of the building plate 1.
[0017]
As shown in FIG. 2, the support plate 2 has a plurality of ventilation holes 2a formed at an upper portion of the inclined piece 22 (near the bent portion with the fixed piece 21) at a constant pitch along the longitudinal direction. Yes. The ventilation port 2a of the support plate 2 is processed to have substantially the same shape (rectangular slit shape) as the ventilation port 1a provided in the building plate 1, and the arrangement pitch corresponds to the pitch of the ventilation port 1a of the building plate 1. is doing.
[0018]
The above support plates 2 are provided on both sides of the building board 1, and each fixing piece 21 is riveted to the upper plate back surface of the building board 1 and each mounting piece 23 is riveted to the folded piece 13 of the building board 1. It is being fixed to the building board 1 by. And the ventilation building can be attached to a building by screwing the attachment piece 23 of the support plate 2 to the purlin 7 of the hut as shown in FIG.
[0019]
As shown in FIGS. 3 and 4, the draining plate 3 is a folded plate obtained by bending a metal plate material (for example, a plate thickness of 0.5 mm) such as a steel plate, and is fixed to the back surface of the ridge plate 1 by riveting or the like. It is comprised by the piece 31, the inclined piece 32 extended diagonally downward from the edge part of the fixed piece 31, and the drooping piece 33 hanging down from the lower end of the inclined piece 32, and to the ridge board 1 (the back surface of the descending ridge part 110) In the fixed state, the inclined piece 32 is located immediately below the ventilation opening 1a of the building board 1.
[0020]
As shown in FIGS. 4 and 7 to 10, the end plate 4 is a bent product of a metal plate material (for example, a plate thickness of 0.5 mm) such as a steel plate, and is a cross section processed into a shape that covers the end of the ridge plate 1. The cover 41 includes a mountain-shaped cover 41, a side plate 42 that covers one side of the cover 41, and an inner plate 43 that is processed into a cross-sectional mountain shape. The lower ends of both sides of the cover 41 are located in the vicinity of the upper surface of the skirt piece 24 of the support plate 2 with the end plate 4 attached to the end portion of the ridge plate 1. The front side is covered.
[0021]
Further, a closing plate 44 for closing a gap formed between the side plate 12 of the building board 1 and the skirt piece 24 of the support plate 2 is provided on the side surface of the lower end portion of the cover 41 (the surface opposite to the side plate 42). ing. However, the lower end surfaces on both sides of the cover 41 are opened, and rainwater or the like accumulated in the lower portion of the side plate 12 of the building board 1 can be released to the outside through the opening 4a.
[0022]
As shown in FIGS. 4 and 11, the end plate 4 is divided into left and right sides with the top portion of the cover 41 as a boundary, and the cover and the side plate of one divided body 104 exceed the top portion of the cover 41, respectively. It extends to the body 204 side, and the inner plate of the other divided body 204 extends to the one divided body 104 side beyond the top, and these extended portions 141 and 142 and the extended portion 243 are respectively the other divided body. 204 or the inner surface of one of the divided bodies 104, and the pair of divided bodies 104 and 204 can swing around the top of the cover 41. Therefore, the end plate 4 can arbitrarily adjust the folding angle of the top portion within a certain range by swinging the pair of divided bodies 104 and 204.
[0023]
In addition, although the structure of the gable board provided in the connection part of a ventilation ridge was shown above, as a gable board attached to the edge part (end part which does not connect) of the ventilation ridge installed in the edge part of a roof ridge, FIG. In the end plate shown in FIG. 1, the inner plate 43 is not used, and the cover 41 is formed with a side plate formed on the entire one side surface.
[0024]
The connecting portion draining plate 5 is a member used for raining the connecting portion of the ventilation building connected to the building ridge. As shown in FIG. 11, a metal plate material such as a steel plate (for example, 0.5 mm thick) is bent. It is a short product (width dimension = about 150 mm to 200 mm) manufactured by processing.
[0025]
The connecting portion draining plate 5 includes a chevron piece 51 processed into a chevron cross section, a vertical piece 52 that falls downward from each lower end of the chevron piece 51 at approximately 90 °, and obliquely outward from each lower end of the vertical piece 52. The skirt piece 53 projecting toward the bottom is integrally formed, and is fitted between the pair of support pieces 2 in a state where the skirt piece 53 is attached to the connection part of the ventilation ridge, and is supported by the angle piece 51, the vertical piece 52, and the skirt piece 53, respectively. It hits the inclined piece 22, the mounting piece 23 and the skirt piece 24 of the piece 2 (see FIG. 4).
[0026]
In the present embodiment, in addition to the above configuration, an insect net is provided on the back side of the ridge board 1 in order to prevent insects and dust entering from the ventilation opening 1a of the ridge board 1 from entering the back of the hut. 6 is provided.
[0027]
According to the present embodiment having the above structure, the air behind the cabin is exhausted to the outside through the ventilation port 2a of the support plate 2 and the ventilation port 1a of the building plate 1 by the negative pressure generated on the upper surface of the building plate 1 (see FIG. 3) The ventilation of the back of the shed is performed efficiently.
[0028]
Moreover, since the side plate 12 of the building board 1 has an outwardly convex cross-sectional shape, when the wind acts on the building board 1 from the lateral direction, Since the wraparound is smooth (large flow velocity), the negative pressure generated on the upper surface of the building board 1 becomes larger. In addition, since the ventilation port 1a is provided at a position where the wind around the upper plate 11 is maximized, that is, in the vicinity of the upper bent portion of the side plate 12, a higher exhaust (ventilation) force can be obtained. Moreover, since the wind wraps around the upper plate 11 of the building board 1 becomes smooth, the ventilation efficiency at the ventilation port 1a on the leeward side is also improved.
[0029]
In this embodiment, when rainwater enters from the ventilation opening 1a of the building board 1, as shown in FIGS. 3 and 4, the rainwater flows along the draining board 3 and falls to the lower part of the side plate 12, It collects in that position or flows out from the notches 1b at both ends of the building board 1. Moreover, in the present embodiment, since the support plate 2 that supports the building board 1 is extended to the back surface of the upper plate 11, the support plate 2 can be used even when rainwater accumulates in the lower portion of the side plate 12. Since the attachment piece 23 and the inclined piece 22 serve as a water return plate, it is possible to reliably prevent rainwater from entering the back of the cabin.
[0030]
Here, according to the present embodiment, since the building board 1 is a metal plate (for example, a steel plate) having a thickness of about 0.5 mm, as shown in FIG. It is possible to change the folding angle of the top part of the building board 1 by bending. Therefore, even if the angle of the building (roof slope) differs depending on the building where the ventilation building is installed, there is an advantage that it can be handled by one type of ventilation building. As described above, the end plate 4 has a structure in which the pair of divided bodies 104 and 204 are combined, and the folding angle of the top of the cover 41 can be arbitrarily adjusted by swinging the divided bodies 104 and 204. By doing so, it is possible to cope with the roof slope of each building.
[0031]
【The invention's effect】
As described above, according to the ventilation building of the present invention, the rainwater that has entered from the ventilation opening provided in the building board is drained to the outside from the water discharge notches provided at both ends of the building board. Since the notch for escaping the water is covered with a gable board, it is difficult for the wind to enter the ventilation building, which increases the differential pressure between the interior of the small building and the top surface of the building board. Also gets higher. And since the draining board is provided below the ventilation opening of the ridge board, it can prevent reliably that the rain water which entered from the ventilation opening permeates into the back of a hut.
[Brief description of the drawings]
FIG. 1 is a plan view (A) and a side view (B) of an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line CC of FIG.
FIG. 3 is a sectional view taken along the line DD of FIG.
4 is a cross-sectional view taken along the line E-E in FIG. 1;
FIG. 5 is a side view of a building board used in the embodiment of the present invention.
6 is a cross-sectional view taken along the line FF in FIG.
FIG. 7 is a front view (A) and a plan view (B) of the end plate used in the embodiment of the present invention.
FIG. 8 is a side view of the end plate.
9 is a cross-sectional view taken along the line GG in FIG.
10 is a view taken in the direction of arrow H in FIG.
FIG. 11 is a front view (A) and a plan view (B) of a connection draining plate used in the embodiment of the present invention.
FIG. 12 is an operation explanatory diagram of the embodiment of the present invention.
[Explanation of symbols]
1 Building board 1a Ventilation port 1b Notch (for water escape)
DESCRIPTION OF SYMBOLS 11 Upper plate 110 Downward ridge part 12 Side plate 13 Folding piece 2 Support plate 2a Ventilation hole 21 Fixed piece 22 Inclined piece 23 Mounting piece 24 Skirt piece 3 Drain plate 31 Fixed piece 32 Inclined piece 33 Suspended piece 4 Tail plate 4a Opening part 41 Cover 42 Side plate 43 Inner plate 44 Closing plate 5 Connection draining plate 51 Yamagata piece 52 Vertical piece 53 Skirt piece 6 Insect screen 7 Purlin

Claims

短手方向の中央部に断面山形に折り曲げ加工された上板を有し、
該上板の短手方向の両側縁にそれぞれ外方に凸となる断面略く字形の側板が一体形成されて、該側板の下端に上向きの折返し片が形成されてなる棟板と、
上記棟板と略等しい全長を有して、上記棟板の上板裏面及び折返し片に固定されることにより上記棟板を下側から建物の棟木に支持固定する支持板と、
棟板の上板裏面両側部に取り付けられ、棟板の短手方向両側部に向けて下降傾斜する水切板とを備え、
上記棟板における両側板の上部近傍と上記支持板の上部近傍には、矩形スリット状の換気口が棟板の長手方向に沿って一定のピッチで複数個設けられるとともに、
棟板の両側板に形成された上記換気口の直下に上記水切板が配置される一方、
棟板の長手方向の両端部には上記換気口が設けられず、両側板の下部及び折返し片の両端部に水抜き用の切欠きが形成されて、この切欠きが棟板の長手方向両端部を塞ぐ妻板によって覆われることを特徴とする換気棟。 It has an upper plate that is bent into a cross-sectional angle at the center in the short direction ,
The lateral direction of the side edges to side plates of each outer section substantially as a convex rather the shape of the upper plate is integrally formed, and ridge plate an upward folded piece is formed at the lower end of the side plate,
A support plate having a length substantially equal to the ridge plate, and supporting and fixing the ridge plate from below to the ridge of the building by being fixed to the upper plate back surface and the folded piece ,
It is attached to both sides of the back of the top plate of the building board, and includes a draining board that slopes downward toward both sides of the building board in the short direction,
At the top near the upper proximity and the support plate of the side plates in the building plate, Rutotomoni rectangular slit-shaped ventilation openings are provided a plurality at a predetermined pitch along the longitudinal direction of the ridge board,
While the water-shielding plate Ru is located directly under the ventilation port formed in side plates of the ridge board,
The ventilation openings are not provided at both ends in the longitudinal direction of the ridgeboard, and notches for draining are formed at the lower portions of the side plates and at both ends of the folded pieces , and these notches are located at both ends in the longitudinal direction of the ridgeboard. Ventilation building that is covered with a gable board that closes the area .