JP3902859B2

JP3902859B2 - Drainage material and drainage structure

Info

Publication number: JP3902859B2
Application number: JP05229998A
Authority: JP
Inventors: 典之金子
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 1997-12-05
Filing date: 1998-03-04
Publication date: 2007-04-11
Anticipated expiration: 2018-03-04
Also published as: JPH11222946A

Description

【０００１】
【発明の属する技術分野】
本発明は、建物の水切り材及び水切り構造に関する。
【０００２】
【従来の技術】
従来、一般施工の住宅においては、換気式の建物が開示されている（特開昭５７−２４７４８号等）。即ち、換気式建物は建物の外壁と内壁との間に通気層を備え、外壁の下方位置に外気通気口を備え、前記通気層と連通されている。そのため、夏季は床下の冷気を吸入して建物の放熱効果を高め、冬季においては、小屋裏に放出された室内暖気を下方に循環させて建物全体の暖気性能の向上が図られている。このような換気式の建物の利点をユニット建物に応用したのが特公平４−７２９３６号公報である。この公報記載のユニット建物は、建物ユニットの接続部と外気流通口に通じる開口部を備えたモールで被覆してなるものである。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記の特公平４−７２９３６号公報に記載されたユニット建物の外壁側下端部に設けられたモールは、開口部が強風時の雨水の浸入を完全に遮断できないと言った問題があった。
【０００４】
本発明は、上記の問題点に着目してなされたものであり、その目的とするところは、これらの問題点を解消し、通気口より建物内部への雨水が浸入するのを防止することができる建物の水切り材及び水切り構造を提供することにある。
【０００５】
【課題を解決するための手段】
請求項１記載の水切り材においては、外壁と内壁との間に通気層を備え、この外壁側下端部に前記通気層に通じる通気口が設けられた建物の、前記通気口を含む外壁側下端部を覆って水切りする水切り材であって、水切り内側部材と、この水切り内側部材の上に被せて取り付けられる水切り外側部材のそれぞれに外気と前記通気口に通じる開口孔が設けられ、それぞれの開口孔が水切り材の長手方向における位置を互いにずらして配置されていることを特徴とする。
【０００６】
請求項２記載の水切り材においては、前記水切り内側部材が、軟質材で成形されていることを特徴とする。
【０００７】
請求項３記載の水切り材においては、請求項１記載の水切り材が、建物外壁の内側に取付けられた水切り受け材に固定され、水切り受け材には建物内通気層と外気に通じる通気口に連通する通気用切り欠きが、水切り内側部材の開口孔と、水切り材の長手方向における位置を互いにずらして設けられ、外気に通じる通気口を覆って設けられていることを特徴とする。
【０００８】
【作用】
請求項１記載の水切り材においては、水切り内側部材と、この水切り内側部材の上に被せて取り付けられる水切り外側部材のそれぞれに外気と前記通気口に通じる開口孔が設けられ、それぞれの開口孔が水切り材の長手方向における位置を互いにずらして配置されているので、開口孔より建物内部への雨水が浸入するのを防止すると共に、建物の通気性能を高めることができる。
【０００９】
請求項２記載の水切り材においては、内側部材が、軟質材で成形されているので、釘固定の時、軟質材で成形された水切り内側部材は下孔なしで釘打ちできるので、施工が容易となる。
【００１０】
請求項３記載の水切り材においては、水切り受け材には建物内通気層と外気に通じる通気口に連通する通気用切り欠きが、水切り内側部材の開口孔と、水切り材の長手方向における位置を互いにずらして設けられ、外気に通じる通気口を覆って設けられているので、より一層、開口孔より建物内部への雨水が浸入するのを防止することが出来る。
【００１１】
【発明の実施の形態】
以下に、本発明の実施の形態を図面を参照して説明する。
図１は、本発明の１実施例であって、水切り材の使用状態を示す断面図である。
図２（イ）は、水切り外側部材の断面図であり、（ロ）は、ＡーＡ’矢視線における断面図である。
図３（イ）は、水切り内側部材の断面図であり、（ロ）は、ＢーＢ’矢視線における断面図である。
図４は水切り受け木桟に水切り材が取り付けられた状態を示す断面図であり、図５は水切り受け木桟に水切り材が取り付けられた状態を示す斜視図であり、図６は通気経路を示す説明図である。
【００１２】
本実施例は、前面に屋上バルコニーのある２階部分の建物の外壁側下端部に取り付けられた水切り材が設けられた状態を示している。バルコニー床面１９と建物の外壁面は防水カバー材２０で仕舞いされている。
外壁１７と内壁１８との間に通気層１０ｂを備え、この外壁側下端部に前記通気層１０ｂに通じる通気口１０ａが設けられた建物に接続されている。
水切り材は水切り外側部材１１と水切り内側部材１２とから構成されて、水切り内側部材１２と、この水切り内側部材１２の上に被せて取り付けられる水切り外側部材１１のそれぞれに、外気と前記通気口１０ａに通じる開口孔１１ｂ、１２ｂが設けられている。そして、それぞれの開口孔１１ｂ、１２ｂは水切り材の長手方向（図１で紙面と直交する方向）における位置を互いにずらして配置されている。
【００１３】
また、開口孔１１ｂ、１２ｂが穿孔されているそれぞれの傾斜辺１１ｅ、１２ｅは内側が上向いて傾斜して取り付けられている。そして、傾斜辺は水切り内側部材１２を上にして、一定の距離をあけて建物の外壁側下端部に釘１５ａ、１５ｂで固定されている。従って、開口孔１１ｂ、１２ｂは外気のみ吸入して、雨水の通気層１０への侵入は防止される。
開口孔１１ｂ、１２ｂから取り入れられた外気Ａは建物の外壁１７の下端部に設けられている通気口１０ａに連接され、通気口１０ａは建物の外壁１７の内部に設けられている通気層１０ｂと連接されて、屋根裏に通じている。
【００１４】
図２は、開口孔１１ｂが設けられた水切り外側部材１１の断面図を示している。
水切り外側部材１１は図１に示すように、建物の外壁１７側下端部の横木桟１４と外壁材に釘１５ａ、１５ｂにて垂直辺１１ａ、１１ｆで固定されている。
垂直辺１１ｃは外壁１７の下端に防水材２１を介装して、外壁面との隙間をなくすようになっている。防水材２１に発泡体の合成樹脂材が用いられている。
傾斜辺１１ｅは内側に上向いて傾斜して、傾斜辺１１ｅには開口孔１１ｂが穿孔されている。図２（ロ）に示すように、開口孔１１ｂは傾斜辺１１ｅの長手方向に等間隔に設けられている。
又、下端部１１ｄは雨水の水切れを良くするために鋭角に折り曲げられいる。
【００１５】
図３（イ）は、開口孔１２ｂが設けられた水切り内側部材１２の断面図を示している。
水切り内側部材１２は、水切り外側部材１１の裏面の垂直辺１１ａに接して、建物の横木桟１４との間に挟まれて釘１５ａ、１５ｂで固定されている。
１２ｇの外周に発泡材２２を圧挿して、水切り内側部材１２の上端１２ｆは水切り外側部材１１を抑えるようにして、密着されている。
【００１６】
水切り内側部材１２の傾斜辺１２ｅは内側に上向いて傾斜して、傾斜辺１２ｅには開口孔１２ｂが穿孔されている。また、開口孔１２ｂは傾斜辺１２ｅの長手方向に等間隔をおいて設けられている。
図２（ロ）、図３（ロ）に示すように、開口孔１２ｂは水切り外側部材１１の開口孔１１ｂとは水切り材の長手方向にずれて穿孔されている。具体的には、１１ｂ、１２ｂはそれぞれ巾１００ミリの開口巾で水切り材の長手方向５００ミリ間隔に配置され、かつ１１ｂ、１２ｂとは２５０ミリずれて配置されている。従って、雨水の通気層１０ｂへの侵入が防止される。
【００１７】
本実施例の水切り材においては、水切り内側部材１２の上に被せて取り付けられる水切り外側部材１１のそれぞれに外気と前記通気口１０ａに通じる開口孔１１ｂ、１２ｂが設けられ、それぞれの開口孔１１ｂ、１２ｂが水切り材の長手方向における位置を互いにずらして配置されているので、通気口１０ａより建物内部への雨水が浸入するのを防止することができる。
【００１８】
また、請求項２記載の水切り内側部材１２においては、軟質材で成形されているので、釘１５ａ、１５ｂ固定の時、下孔なしで釘打ちできるので、施工の手間が鋼板下地に比べ軽減することができる。
【００１９】
請求項３記載水切り材は、図４に示す様に、建物外壁の内側に取付けられた水切り受け材３０に固定されている。
そして、水切り受け材３０には、等間隔に通気用切り欠き３１が設けられている。通気用切り欠き３１は上端で建物内の通気層１０ｂに連通して、下方で外気に通じる通気口１０ａに連通している。
又、水切り材の開口孔と水切り受け材３０に設けられた通気用切り欠き３１とは位置をずらして設けられている。
【００２０】
図５に示す様に、通気用切り欠き３１は建物の通気層に対応できる様に等間隔に設けられている。切り欠きの形状は断面を矩形になされているが、断面積を略一定にすれば、縦横の寸法は自由である。断面積は建物の通気層と対比して決められる。細長い矩形でもよく、あるいは円形の形状でも構わない。
一方、水切り材は、前述のように、水切り外側部材１１と水切り内側部材１２とから構成されて、水切り内側部材１２と、この水切り内側部材１２の上に被せて取り付けられる水切り外側部材１１のそれぞれに、外気と前記通気口１０ａに通じる開口孔１１ｂ、１２ｂが設けられている。それぞれの開口孔１１ｂ、１２ｂは水切り材の長手方向における位置を互いにずらして配置されている。
【００２１】
以上の様に、外気の建物内の通気層への経路は、図６に示す様に、外気は水切り材の開口孔１１ｂより進入して、壁面を水平に移動して、開口孔１２ｂを通って又、壁面を水平に移動して通気口１０ａから水切り受け材３０に設けられた通気用切り欠き３１に入ることができる。その後建物通気層１０ｂへと外気は流入してゆく。
以上の様に、水切り材の開口孔１１ｂ，１２ｂの位置ずれと水切り受け材３０に設けられた通気用切り欠き３１がすべて開口孔１１ｂ，１２ｂと通気口１０ａの位置をそれぞれずらして設けているので、雨水の浸入をより一層防止する事ができる。
【発明の効果】
請求項１記載の水切り材においては、水切り内側部材と、この水切り内側部材の上に被せて取り付けられる水切り外側部材のそれぞれに外気と前記通気口に通じる開口孔が設けられ、それぞれの開口孔が水切り材の長手方向における位置を互いにずらして配置されているので、開口孔より建物内部への雨水が浸入するのを防止すると共に、建物の通気性能を高めることができる。
【００２２】
請求項２記載の水切り材においては、内側部材が、軟質材で成形されているので、釘固定の時、軟質材で成形された水切り内側部材は下孔なしで釘打ちできるので、施工が容易となる。
【００２３】
請求項３記載の水切り材においては、水切り受け材には建物内通気層と外気に通じる通気口に連通する通気用切り欠きが、水切り内側部材の開口孔と、水切り材の長手方向における位置を互いにずらして設けられ、外気に通じる通気口を覆って設けられているので、より一層、開口孔より建物内部への雨水が浸入するのを防止することが出来る。
【図面の簡単な説明】
【図１】本発明の１実施例であって、水切り材の使用状態を示す断面図である。
【図２】（イ）は、水切り外側部材の断面図であり、（ロ）は、ＡーＡ’矢視線における断面図である。
【図３】（イ）は、水切り内側部材の断面図であり、（ロ）は、ＢーＢ’矢視線における断面図である。
【図４】水切り受け木桟に水切り材が取り付けられた状態を示す断面図である。
【図５】水切り受け木桟に水切り材が取り付けられた状態を示す斜視図である。
【図６】通気経路を示す説明図である。
【符号の説明】
１０ａ通気口
１０ｂ通気層
１１水切り外側部材
１１ａ、１１ｃ、１１ｆ垂直辺
１１ｂ開口孔
１１ｄ屈折部
１１ｅ傾斜辺
１２水切り内側部材
１２ａ、１２ｃ、１２ｇ垂直辺
１２ｂ開口孔
１２ｄ屈折部
１２ｅ傾斜辺
１２ｆ斜辺
１４横木桟
１５ａ、１５ｂ釘
１７外壁
１８内壁
１９バルコニー床面
２０防水カバー材
２１発泡体
２２発泡体
３０水切り受け材
３１通気用切り欠き[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a draining material for a building and a draining structure.
[0002]
[Prior art]
Conventionally, ventilated buildings have been disclosed in general construction houses (Japanese Patent Laid-Open No. 57-24748, etc.). That is, the ventilated building has a ventilation layer between the outer wall and the inner wall of the building, has an outside air vent at a position below the outer wall, and communicates with the ventilation layer. For this reason, in summer, cold air under the floor is sucked to enhance the heat dissipation effect of the building, and in winter, indoor warm air discharged to the back of the shed is circulated downward to improve the warming performance of the entire building. Japanese Examined Patent Publication No. 4-72936 applies the advantage of such a ventilation type building to a unit building. The unit building described in this publication is covered with a molding having an opening that leads to a connecting portion of the building unit and an outside air circulation port.
[0003]
[Problems to be solved by the invention]
However, the mall provided at the lower end of the outer wall side of the unit building described in the above Japanese Patent Publication No. 4-72936 has a problem that the opening cannot completely block the intrusion of rainwater during strong winds. .
[0004]
The present invention has been made paying attention to the above-mentioned problems, and the object of the present invention is to eliminate these problems and prevent rainwater from entering the building through the vents. The object is to provide a drainage material and drainage structure for a building.
[0005]
[Means for Solving the Problems]
The draining material according to claim 1, wherein a ventilation layer is provided between the outer wall and the inner wall, and a lower end on the outer wall side including the ventilation hole of the building provided with a ventilation hole leading to the ventilation layer at a lower end portion on the outer wall side. A draining material for covering and draining water is provided, and each of the draining inner member and the draining outer member attached on the draining inner member is provided with an opening hole that communicates with the outside air and the vent hole. The holes are arranged such that the positions in the longitudinal direction of the draining material are shifted from each other.
[0006]
The draining material according to claim 2 is characterized in that the draining inner member is formed of a soft material.
[0007]
In the drainage material according to claim 3, the drainage material according to claim 1 is fixed to the drainage receiving material attached to the inner side of the outer wall of the building, and the drainage receiving material has a ventilation layer that communicates with the ventilation layer in the building and the outside air. The communicating notch is provided so that the opening hole of the draining inner member and the position of the draining material in the longitudinal direction are shifted from each other, and covers the vent hole communicating with the outside air.
[0008]
[Action]
In the draining material according to claim 1, each of the draining inner member and the draining outer member attached to the draining inner member is provided with an opening hole that communicates with the outside air and the vent hole. Since the position of the draining material in the longitudinal direction is shifted from each other, it is possible to prevent rainwater from entering the building through the opening hole and to improve the ventilation performance of the building.
[0009]
In the draining material according to claim 2, since the inner member is formed of a soft material, when the nail is fixed, the draining inner member formed of the soft material can be nailed without a pilot hole, so that the construction is easy. It becomes.
[0010]
In the draining material according to claim 3, the drainage receiving material has a ventilation notch communicating with the ventilation layer in the building and the air vent communicating with the outside air, the opening hole of the draining inner member, and the position in the longitudinal direction of the draining material. Since they are provided so as to be shifted from each other and cover the vent hole leading to the outside air, it is possible to further prevent rainwater from entering the building through the opening hole.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing an embodiment of the present invention and showing a use state of a draining material.
2A is a cross-sectional view of the draining outer member, and FIG. 2B is a cross-sectional view taken along the line AA ′.
FIG. 3A is a cross-sectional view of the draining inner member, and FIG. 3B is a cross-sectional view taken along the line BB ′.
FIG. 4 is a cross-sectional view showing a state in which a draining material is attached to the draining bridge, FIG. 5 is a perspective view showing a state in which the draining material is attached to the draining bridge, and FIG. It is explanatory drawing shown.
[0012]
This example shows a state in which a draining material attached to the lower end of the outer wall side of the building on the second floor with the roof balcony on the front is provided. The balcony floor 19 and the outer wall surface of the building are filled with a waterproof cover material 20.
A ventilation layer 10b is provided between the outer wall 17 and the inner wall 18, and is connected to a building in which a ventilation hole 10a leading to the ventilation layer 10b is provided at a lower end portion on the outer wall side.
The draining material is constituted by a draining outer member 11 and a draining inner member 12, and outside air and the vent hole 10 a are respectively attached to the draining inner member 12 and the draining outer member 11 attached to the draining inner member 12. Opening holes 11b and 12b that lead to are provided. And each opening hole 11b, 12b is arrange | positioned mutually shifting the position in the longitudinal direction (direction orthogonal to a paper surface in FIG. 1) of the draining material.
[0013]
In addition, the inclined sides 11e and 12e in which the opening holes 11b and 12b are perforated are attached with the inner side facing upward. The inclined sides are fixed with nails 15a and 15b to the lower end of the outer wall side of the building with a certain distance with the draining inner member 12 facing upward. Therefore, the opening holes 11b and 12b suck only the outside air, and the rainwater is prevented from entering the ventilation layer 10.
The outside air A taken in from the opening holes 11b and 12b is connected to a vent 10a provided at the lower end portion of the outer wall 17 of the building, and the vent 10a is connected to the vent layer 10b provided inside the outer wall 17 of the building. It is connected and leads to the attic.
[0014]
FIG. 2 shows a cross-sectional view of the draining outer member 11 provided with the opening hole 11b.
As shown in FIG. 1, the draining outer member 11 is fixed to the crosspiece 14 and the outer wall material at the lower end of the building on the outer wall 17 side by vertical sides 11 a and 11 f with nails 15 a and 15 b.
The vertical side 11c is provided with a waterproof material 21 at the lower end of the outer wall 17 so as to eliminate a gap with the outer wall surface. A foamed synthetic resin material is used for the waterproof material 21.
The inclined side 11e is inclined upward inward, and an opening hole 11b is formed in the inclined side 11e. As shown in FIG. 2B, the opening holes 11b are provided at equal intervals in the longitudinal direction of the inclined side 11e.
Further, the lower end portion 11d is bent at an acute angle in order to improve drainage of rainwater.
[0015]
FIG. 3A shows a cross-sectional view of the draining inner member 12 provided with the opening hole 12b.
The draining inner member 12 is in contact with the vertical side 11a on the back surface of the draining outer member 11 and is sandwiched between the cross rails 14 of the building and fixed with nails 15a and 15b.
The foam material 22 is press-fitted into the outer periphery of 12 g, and the upper end 12 f of the draining inner member 12 is in close contact with the draining outer member 11.
[0016]
The inclined side 12e of the draining inner member 12 is inclined upward inward, and an opening hole 12b is formed in the inclined side 12e. The opening holes 12b are provided at equal intervals in the longitudinal direction of the inclined side 12e.
As shown in FIGS. 2 (b) and 3 (b), the opening hole 12 b is perforated with a deviation from the opening hole 11 b of the draining outer member 11 in the longitudinal direction of the draining material. Specifically, 11b and 12b are each arranged with an opening width of 100 mm and an interval of 500 mm in the longitudinal direction of the draining material, and are displaced 250 mm from 11b and 12b. Therefore, intrusion of rainwater into the ventilation layer 10b is prevented.
[0017]
In the draining material of the present embodiment, each of the draining outer member 11 mounted on the draining inner member 12 is provided with opening holes 11b and 12b communicating with the outside air and the vent hole 10a. Since 12b is arrange | positioned mutually shifting the position in the longitudinal direction of a draining material, it can prevent that the rain water permeates into the inside of a building from the vent 10a.
[0018]
Further, in the draining inner member 12 according to claim 2, since it is formed of a soft material, when fixing the nail 15a, 15b, it can be nailed without a pilot hole, so that the labor of construction is reduced compared to the steel plate base. be able to.
[0019]
As shown in FIG. 4, the draining material according to claim 3 is fixed to a draining receiving material 30 attached to the inside of the building outer wall.
The drainage receiving member 30 is provided with ventilation notches 31 at equal intervals. The ventilation notch 31 communicates with the ventilation layer 10b in the building at the upper end and communicates with the ventilation hole 10a communicating with the outside air at the lower side.
Further, the opening hole of the draining material and the ventilation notch 31 provided in the draining receiving member 30 are provided in a shifted position.
[0020]
As shown in FIG. 5, the ventilation notches 31 are provided at equal intervals so as to correspond to the ventilation layer of the building. The shape of the notch has a rectangular cross section, but if the cross sectional area is made substantially constant, the vertical and horizontal dimensions are free. The cross-sectional area is determined by comparing with the ventilation layer of the building. It may be an elongated rectangle or a circular shape.
On the other hand, as described above, the draining material is constituted by the draining outer member 11 and the draining inner member 12, and each of the draining inner member 12 and the draining outer member 11 attached to the draining inner member 12. In addition, opening holes 11b and 12b communicating with the outside air and the vent hole 10a are provided. The respective opening holes 11b and 12b are arranged with their positions in the longitudinal direction of the draining material shifted from each other.
[0021]
As described above, the path of the outside air to the ventilation layer in the building is as shown in FIG. 6. The outside air enters from the opening hole 11b of the draining material, moves horizontally on the wall surface, and passes through the opening hole 12b. In addition, the wall surface can be moved horizontally to enter the ventilation notch 31 provided in the drainage receiving member 30 from the vent 10a. Thereafter, the outside air flows into the building ventilation layer 10b.
As described above, the displacement of the opening holes 11b and 12b of the draining material and the ventilation notch 31 provided in the draining receiving material 30 are all provided by shifting the positions of the opening holes 11b and 12b and the ventilation hole 10a. Therefore, infiltration of rainwater can be further prevented.
【The invention's effect】
In the draining material according to claim 1, each of the draining inner member and the draining outer member attached to the draining inner member is provided with an opening hole that communicates with the outside air and the vent hole. Since the position of the draining material in the longitudinal direction is shifted from each other, it is possible to prevent rainwater from entering the building through the opening hole and to improve the ventilation performance of the building.
[0022]
In the draining material according to claim 2, since the inner member is formed of a soft material, when the nail is fixed, the draining inner member formed of the soft material can be nailed without a pilot hole, so that the construction is easy. It becomes.
[0023]
In the draining material according to claim 3, the drainage receiving material has a ventilation notch communicating with the ventilation layer in the building and the air vent communicating with the outside air, the opening hole of the draining inner member, and the position in the longitudinal direction of the draining material. Since they are provided so as to be shifted from each other and cover the vent hole leading to the outside air, it is possible to further prevent rainwater from entering the building through the opening hole.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a use state of a draining material according to an embodiment of the present invention.
2A is a cross-sectional view of a draining outer member, and FIG. 2B is a cross-sectional view taken along the line AA ′.
3A is a cross-sectional view of the draining inner member, and FIG. 3B is a cross-sectional view taken along the line BB ′.
FIG. 4 is a cross-sectional view showing a state in which a draining material is attached to a draining bridge.
FIG. 5 is a perspective view showing a state in which a draining material is attached to a draining bridge.
FIG. 6 is an explanatory diagram showing a ventilation path.
[Explanation of symbols]
10a Vent 10b Vent layer 11 Draining outer member 11a, 11c, 11f Vertical side 11b Opening hole 11d Refraction part 11e Inclined side 12 Draining inner member 12a, 12c, 12g Vertical side 12b Opening hole 12d Refraction part 12e Inclined side 12f Inclined side 14 Yokogi Crosspieces 15a, 15b Nails 17 Outer wall 18 Inner wall 19 Balcony floor 20 Waterproof cover material 21 Foam 22 Foam 30 Drainage receiving material 31 Notch for ventilation

Claims

A draining material for covering and draining the lower end on the outer wall side including the vent in a building having a vent layer between the outer wall and the inner wall and provided with a vent leading to the vent layer on the lower end on the outer wall side. In addition, each of the draining inner member and the draining outer member attached to the draining inner member is provided with an opening that communicates with the outside air and the vent, and each opening hole has a position in the longitudinal direction of the draining material. A draining material, characterized by being shifted from each other.

The draining material according to claim 1, wherein the draining inner member is formed of a soft material.

The drainage material according to claim 1 is fixed to a drainage receiving material attached to the inside of the outer wall of the building, and the drainage receiving material has a ventilation notch that communicates with the ventilation layer in the building and an air vent leading to the outside air. A draining structure, characterized in that the opening hole of the member and the position of the draining material in the longitudinal direction are shifted from each other, and are provided to cover a vent hole communicating with the outside air.