JP3682196B2

JP3682196B2 - Roof material connection structure

Info

Publication number: JP3682196B2
Application number: JP2000049408A
Authority: JP
Inventors: 圭一菅井
Original assignee: NIPPON STEEL COATED SHEET CORPORATION
Current assignee: NIPPON STEEL COATED SHEET CORPORATION
Priority date: 2000-02-25
Filing date: 2000-02-25
Publication date: 2005-08-10
Anticipated expiration: 2020-02-25
Also published as: JP2001241148A

Description

【０００１】
【発明の属する技術分野】
本発明は、谷部と山部とを軒長さ方向に交互に形成した屋根材の接続構造に関し、詳しくは、パッキンを介装して重ね接続する場合の重ね接続部の内外の圧力差に起因する雨水の浸入を効果的に防止して充分なシールおこなおうとする技術に係るものである。
【０００２】
【従来の技術】
従来、図６に示す特開平１０−２４５９４１号公報のように、軒棟方向に連続する谷部１と山部２とを軒長さ方向に交互に形成して屋根材を形成し、軒側の屋根材Ａ１の棟側端部に棟側の屋根材Ａ２の軒側端部を重ねる屋根材の接続構造においては、軒側の屋根材Ａ１と棟側の屋根材Ａ２との重ね接続部３の軒側部に第１パッキンＰａを、重ね接続部３の棟側部に第２パッキンＰｂを重ね接続部３の軒長さ方向の全長に設けるものである。
【０００３】
つまり、重ね接続部３の軒長さ方向の全長にわたるとともに軒側部と棟側部との各々に紐状のパッキンＰａ、Ｐｂを介装するものである。
【０００４】
【発明が解決しようとする課題】
このように、重ね接続部３の軒側及び棟側において紐状のパッキンＰａ、Ｐｂを介装する場合に、紐状のパンキンＰａ、Ｐｂのいずれにおいても屋根材、特に、棟側の屋根材Ａ２との間に微少な隙間が生じやすく、紐状のパッキンＰａ、Ｐｂの内外における気圧の差に起因する雨水の吸込みによって、容易に雨水がパッキンＰａ、Ｐｂを越えて屋根裏に浸入するという問題があった。
【０００５】
本発明はこのような問題に鑑みてなされたものであり、重ね接続部にパッキンを介装する場合のパッキン内外の圧力差に起因する雨水の浸入を効果的に防止して充分なシールを図ることができる屋根材の接続構造を提供することを課題とするものである。
【０００６】
【課題を解決するための手段】
請求項１においては、軒棟方向に連続する谷部１と山部２とを軒長さ方向に交互に形成して屋根材を形成し、軒側の屋根材Ａ１の棟側端部に棟側の屋根材Ａ２の軒側端部を重ねる屋根材の接続構造であって、軒側の屋根材Ａ１と棟側の屋根材Ａ２との重ね接続部３の軒側部に第１パッキンＰ１を、重ね接続部３の軒棟方向の中間部に第２パッキンＰ２を、重ね接続部３の棟側部に第３パッキンＰ３を各々重ね接続部３の軒長さ方向の全長にわたって設け、第１パッキンＰ１の谷部分に通気を兼ねた排水用開口４を形成し、第２パッキンＰ２の山部分に通気口５を、谷部分に通気を兼ねた排水口６を形成していることを特徴とするものである。
【０００７】
このような構成によれば、第１パッキンＰ１の通気を兼ねた排水用開口４によって第１パッキンＰ１の内外における気圧の差をなくし、第２パッキンＰ２の山部分の通気口５及び谷部分の排水口６によって第２パッキンＰ２の内外の気圧の差をなくし、結果として、重ね接続部３の外部の気圧と第３パッキンＰ３以前の内部の気圧との間に差が生じるのを防止して略等圧とするのであり、重ね接続部３の内部に内外の気圧の差に起因して吸込みによる雨水の浸入を防止することができ、つまり、負圧によるシール破壊を効果的に防止することができ、しかも、第１パッキンＰ１の通気を兼ねた排水用開口４及び第２パッキンＰ２の谷部分に形成した通気を兼ねた排水口６から第３パッキンＰ３側に浸入した雨水は、排水口６及び排水用開口４から屋根勾配によって自然に排水することができるのであり、このように、流入した雨水は自然に排水することができるのであり、しかして、重ね接続部３の内外の圧力差に起因する雨水の浸入を効果的に防止して充分なシールを図ることができるものである。
【０００８】
請求項２においては、第２パッキンＰ２の排水口６には、排水は許すが雨水の流入を阻止する逆止弁７を設けていることを特徴とするものである。このような構成によれば、第２パッキンＰ２の排水口６からの雨水の浸入を阻止することができ、雨水の吹込みを防止することができる。
【０００９】
請求項３においては、逆止弁７は、排水口６の軒側の上縁部において、弁板８の上端部を弁ケース９に揺動自在に枢支していることを特徴とするものである。このような構成によれば、逆止弁７は上端部において揺動自在に吊下げられていて、屋根の勾配に起因して僅かな開き状態になるのであり、このように自然状態では開いていることから、浸入した雨水の排水を良好におこなうことができながら、逆止弁７に浸入しようとする風雨によって弁板８を揺動させて閉じることができ、雨水の浸入を効果的に防止することができる。
【００１０】
【発明の実施の形態】
以下、本発明の実施の形態を説明する。図１は概略斜視図、図２は概略断面図、図３は概略正面図、図４は逆止弁を示している。
【００１１】
金属製の屋根板１０は、ロール成形にて角波形状に曲げ加工され、このような屋根板１０と平坦な金属板１１間に合成樹脂発泡層１２を充填発泡させて屋根材としての断熱屋根パネル１３が構成されている。
【００１２】
断熱屋根パネル１３の軒側端部の屋根板１０の下面の合成樹脂発泡層１２及び金属板１１が除去されて屋根板１０の軒側端部が露出している。本発明は、上述のような断熱屋根パネル１３に実施したが、合成樹脂発泡層１２がない折板屋根材や、二重折板構造で上下の折板間にロックウールや繊維状の通常の断熱材を充填した構成の屋根材等に実施してもよいものである。
【００１３】
断熱屋根パネル１３、１３を棟軒方向に接続するのに際して、図２及び図３に示すように、軒側と棟側の断熱屋根パネル１３、１３を母屋１４に載置し、軒側の断熱屋根パネル１３の棟側端部に棟側の断熱屋根パネル１３の軒側端部を重ねるのであり、このような重ね接続部３の軒側部に第１パッキンＰ１を、重ね接続部３の軒棟方向の中間部に第２パッキンＰ２を、重ね接続部３の棟側部に第３パッキンＰ３を各々重ね接続部３の軒長さ方向の全長にわたって敷設するのである。
【００１４】
ところで、第１パッキンＰ１の谷部分に通気を兼ねた排水用開口４を形成している。第２パッキンＰ２の山部分に通気口５を、谷部分に通気を兼ねた排水口６を形成している。第３パッキンＰ３は全長において均等なシールおこなうものである。このような第１パッキンＰ１乃至第３パッキンＰ３は、例えば、ＥＰＤＭ、シリコンゴム、ウレタン、塩ビ等のスポンジ状パッキンである。
【００１５】
このような構成によれば、第１パッキンＰ１の通気を兼ねた排水用開口４によって第１パッキンＰ１の内外における気圧の差をなくすのである。又、第２パッキンＰ２の山部分の通気口５及び谷部分の排水口６によって第２パッキンＰ２の内外の気圧の差をなくすのである。このように、重ね接続部３の外部の気圧と第３パッキンＰ３以前の内部の気圧との間に差が生じるのを防止するのであり、重ね接続部３の内外の気圧の差に起因する雨水の浸入を効果的に防止するのである。
【００１６】
ところで、このような構成においては、第１パッキンＰ１の通気を兼ねた排水用開口４及び第２パッキンＰ２の谷部分に形成した通気を兼ねた排水口６から第３パッキンＰ３側に雨水が吹込みによって浸入するのであり、浸入した雨水は、排水口６及び排水用開口４から屋根勾配によって自然に排水することができるのである。このように、流入した雨水は自然に排水することができるのであり、しかして、重ね接続部３の内外の圧力差に起因する雨水の浸入を防止して充分なシールを図るものである。
【００１７】
図１、図２及び図４に示すように、第２パッキンＰ２の排水口６には、排水は許すが雨水の流入を阻止する逆止弁７を設けている。逆止弁７は、排水口６の軒側の上縁部において、弁板８の上端部を弁ケース９に揺動自在に軸１５にて枢支している。
【００１８】
このような構成によれば、逆止弁７によって、第２パッキンＰ２の排水口６からの雨水の浸入を阻止することができ、雨水の吹込みを防止することができるのである。更に、逆止弁７は、排水口６の軒側の上縁部において、弁板８の上端部を弁ケース９に揺動自在に枢支していることから、屋根の勾配に起因して僅かな開き状態になるのであり、このように自然状態では開いていることから、浸入した雨水の排水を良好におこなうことができながら、逆止弁７に浸入しようとする突発的な風雨の吹込み力によって弁板８を揺動させて閉じることができ、雨水の浸入を効果的に防止することができるのである。
【００１９】
ところで、第１パッキンＰ１乃至第３パッキンＰ３の配置、第１パッキンＰ１の谷部分に通気を兼ねた設けた排水用開口４、第２パッキンＰ２の山部分に形成した通気口５、谷部分に通気を兼ねて設けた排水口６の各寸法は以下のように設定して重ね接続部３の外部の圧力ＰＸと内部の圧力ＰＹとを等圧になるようにしている。
【００２０】
第１パッキンＰ１乃至第３パッキンＰ３は材質、寸法が等しい同仕様のものであり、第１パッキンＰ１の高さＨＡ、第２パッキンＰ２の高さＨＢ及び第３パッキンＰ３の高さＨＣは１．５ｃｍ、幅Ｗは３．０ｃｍである。山部２と谷部３とのピッチＬＣは３０ｃｍである。ところで、パッキンの高さＨＡ、ＨＢ、ＨＣとは、自由状態のパッキンの高さを約６割程度圧縮して使用する圧縮状態の高さを言う。
【００２１】
この場合、第３パッキンＰ３は重ね接続部３の上下の金属板１０、１０に対して圧接しているが、実際（ミクロ的）には、隙間が約０．０５ｍｍ程度生じている。このような隙間をなくすことは不可能であることから、隙間は残しながら隙間を雨水が越えることを防止しようとするものである。
【００２２】
このため、第３パッキン３の１ピッチの上下面における隙間面積Ｓに比べて
第２パッキンＰ２と第３パッキンＰ３との間の通路断面積Ｓ１、
第１パッキンＰ１と第２パッキンＰ２との間の通路断面積Ｓ２、
第２パッキンＰ２の山部２の通気口５の横断面積Ｓ３、
第１パッキンＰ１の谷部１の通気を兼ねた排水用開口４の横断面積Ｓ４
の各々が５〜７倍以上となるように設定したものである。
【００２３】
しかして、第１パッキンＰ１と第２パッキンＰ２との間隔ＬＡは７．５ｃｍ、第２パッキンＰ２と第３パッキンＰ３との間隔ＬＢは１７．５ｃｍとする。第１パッキンＰ１の通気を兼ねた排水用開口４の幅ＷＡは５．０ｃｍとする。第２パッキンＰ２の山部２の通気口５の幅ＷＢは２．０ｃｍとする。山部２と谷部３とのピッチＬＣは３０ｃｍとする。
【００２４】
従って、
Ｓ＝２×ＬＣ×０．０５ｍｍ＝２×３０ｃｍ×０．００５ｃｍ＝０．３ｃｍ²
Ｓ１＝ＬＢ×ＨＣ＝１７．５ｃｍ×１．５ｃｍ＝２６．２５ｃｍ²
Ｓ２＝ＬＡ×ＨＢ＝７．５ｃｍ×１．５ｃｍ＝１１．２５ｃｍ²
Ｓ３＝ＷＢ×ＨＢ＝２．０ｃｍ×１．５ｃｍ＝３．０ｃｍ²
Ｓ４＝ＷＡ×ＨＡ＝５．０ｃｍ×１．５ｃｍ＝７．５ｃｍ²
となり、等圧理論から、Ｓ１〜Ｓ４の何れもＳの５倍以上となる。
つまり、Ｓ×５≪Ｓ１、Ｓ２、Ｓ３、Ｓ４は、０．３×５≪３．０〜２６．２５より満足される。
【００２５】
ところで、逆止弁７の高さｍは第２パッキンＰ２の高さＨＢに等しく、長さｎはパッキンの幅Ｗに等しく、弁ケース９の厚さｔは２ｍｍである。
【００２６】
尚、本発明においては、軒側の屋根材Ａ１と棟側の屋根材Ａ２との断面形状は、例えば、図５（ａ）（ｂ）（ｃ）に示すように、一致していなくてもよいものである。そして、第１パッキンＰ１乃至第３パッキンＰ３の断面形状は、軒側の屋根材Ａ１と棟側の屋根材Ａ２とを重ねた形状になるものである。
【００２７】
【発明の効果】
請求項１においては、軒棟方向に連続する谷部と山部とを軒長さ方向に交互に形成して屋根材を形成し、軒側の屋根材の棟側端部に棟側の屋根材の軒側端部を重ねる屋根材の接続構造であって、軒側の屋根材と棟側の屋根材との重ね接続部の軒側部に第１パッキンを、重ね接続部の軒棟方向の中間部に第２パッキンを、重ね接続部の棟側部に第３パッキンを各々重ね接続部の軒長さ方向の全長にわたって設け、第１パッキンの谷部分に通気を兼ねた排水用開口を形成し、第２パッキンの山部分に通気口を、谷部分に通気を兼ねた排水口を形成しているから、第１パッキンの通気を兼ねた排水用開口によって第１パッキンの内外における気圧の差をなくし、第２パッキンの山部分の通気口及び谷部分の排水口によって第２パッキンの内外の気圧の差をなくし、結果として、重ね接続部の外部の気圧と第３パッキン以前の内部の気圧との間に差が生じるのを防止して略等圧とするのであり、重ね接続部の内部に内外の気圧の差に起因して吸込みによる雨水の浸入を防止することができ、つまり、負圧によるシール破壊を効果的に防止することができのである。
【００２８】
しかも、第１パッキンの通気を兼ねた排水用開口及び第２パッキンの谷部分に形成した通気を兼ねた排水口から第３パッキン側に浸入した雨水は、排水口及び排水用開口から屋根勾配によって自然に排水することができるのであり、このように、流入した雨水は自然に排水することができるのである。
【００２９】
しかして、重ね接続部の内外の圧力差に起因する雨水の浸入を効果的に防止して充分なシールを図ることができるという利点がある。
【００３０】
請求項２においては、第２パッキンの排水口には、排水は許すが雨水の流入を阻止する逆止弁を設けているから、請求項１の効果に加えて、第２パッキンの排水口からの雨水の浸入を阻止することができ、雨水の吹込みを防止することができるという利点がある。
【００３１】
請求項３においては、逆止弁は、排水口の軒側の上縁部において、弁板の上端部を弁ケースに揺動自在に枢支しているから、請求項２の効果に加えて、逆止弁は上端部において揺動自在に吊下げられていて、屋根の勾配に起因して僅かな開き状態になるのであり、このように自然状態では開いていることから、浸入した雨水の排水を良好におこなうことができながら、逆止弁に浸入しようとする風雨によって弁板を揺動させて閉じることができ、雨水の浸入を効果的に防止することができるという利点がある。
【図面の簡単な説明】
【図１】本発明の実施の一形態を示す概略斜視図である。
【図２】同上の概略断面図である。
【図３】同上の軒長さ方向の正断面図である。
【図４】同上の逆止弁を示し、（ａ）は斜視図、（ｂ）は弁ケースの斜視図、（ｃ）は作用示す説明図である。
【図５】同上の他の実施の形態を示し、（ａ）（ｂ）（ｃ）は軒長さ方向の概略断面図である。
【図６】従来例の概略断面図である。
【符号の説明】
１谷部
２山部
３重ね接続部
４通気を兼ねた排水用開口
５通気口
６排水口
７逆止弁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roof material connection structure in which valleys and peaks are alternately formed in the eaves length direction, and more specifically, the pressure difference between the inside and outside of a lap connection when a lap connection is made via packing. The present invention relates to a technique for effectively preventing the intrusion of rainwater and performing a sufficient seal.
[0002]
[Prior art]
Conventionally, as shown in Japanese Patent Application Laid-Open No. 10-245941 shown in FIG. 6, the roof material is formed by alternately forming the valleys 1 and the peaks 2 continuous in the eave building direction in the eaves length direction. In the roof material connection structure in which the eaves-side end of the ridge-side roof material A2 is overlapped with the ridge-side end of the roof material A1, the overlap connection 3 between the eave-side roof material A1 and the ridge-side roof material A2 The first packing Pa is provided on the eaves side portion, and the second packing Pb is provided on the ridge side portion of the overlap connection portion 3 over the entire length of the overlap connection portion 3 in the eave length direction.
[0003]
That is, string-like packings Pa and Pb are interposed in each of the eaves side and the ridge side as well as extending over the entire length of the eaves connecting portion 3 in the eave length direction.
[0004]
[Problems to be solved by the invention]
Thus, when the string-like packing Pa, Pb is interposed on the eaves side and the ridge side of the overlapped connection portion 3, the roof material, especially the ridge-side roof material, is used in both of the string-like packing Pa, Pb. There is a problem that a minute gap is likely to occur between A2 and the rainwater easily intrudes into the attic over the packing Pa and Pb due to the suction of rainwater caused by the difference in pressure between the inside and outside of the string-like packing Pa and Pb. was there.
[0005]
The present invention has been made in view of such a problem, and effectively prevents rainwater from entering due to a pressure difference between the inside and outside of the packing when the packing is interposed in the overlapping connection portion, thereby achieving sufficient sealing. An object of the present invention is to provide a roofing material connection structure that can be used.
[0006]
[Means for Solving the Problems]
In Claim 1, the trough part 1 and the mountain part 2 which continue in the eaves ridge direction are formed alternately in the eaves length direction, a roof material is formed, and a ridge is formed in the ridge side edge part of the eaves side roof material A1. The roof material connection structure of the eaves side end portion of the roof material A2 on the side is overlapped, and the first packing P1 is attached to the eave side portion of the overlap connection portion 3 of the roof material A1 on the eave side and the roof material A2 on the ridge side. The second packing P2 is provided in the middle part of the lap connection part 3 in the eaves ridge direction, and the third packing P3 is provided on the ridge side part of the lap connection part 3 over the entire length of the lap connection part 3 in the eaves length direction. A drainage opening 4 that also serves as ventilation is formed in the valley portion of the packing P1, a ventilation port 5 is formed in the peak portion of the second packing P2, and a drainage port 6 that also serves as ventilation is formed in the valley portion. To do.
[0007]
According to such a configuration, the difference in atmospheric pressure between the inside and outside of the first packing P1 is eliminated by the drainage opening 4 which also serves as ventilation of the first packing P1, and the ventilation holes 5 and the valley portions of the peak portions of the second packing P2 are eliminated. The drain port 6 eliminates the difference between the pressure inside and outside the second packing P2, and as a result, prevents the difference between the pressure outside the overlapped connection 3 and the pressure before the third packing P3 from occurring. Because the pressure is almost equal, it is possible to prevent rainwater from entering due to the difference between the internal and external air pressure inside the overlapped connection part 3, that is, to effectively prevent seal breakage due to negative pressure. In addition, rainwater that has entered the third packing P3 side from the drainage opening 4 that also serves as the ventilation of the first packing P1 and the drainage opening 6 that also serves as ventilation in the valley portion of the second packing P2 6 and drainage opening 4 The roof can be drained naturally by the slope of the roof, and thus the inflowing rainwater can be drained naturally. However, the intrusion of rainwater due to the pressure difference between the inside and outside of the lap connection 3 Can be effectively prevented and sufficient sealing can be achieved.
[0008]
The drainage port 6 of the second packing P2 is provided with a check valve 7 that allows drainage but prevents inflow of rainwater. According to such a configuration, the intrusion of rainwater from the drain port 6 of the second packing P2 can be prevented, and the rainwater can be prevented from being blown in.
[0009]
The check valve 7 is characterized in that the upper end of the valve plate 8 is pivotally supported by the valve case 9 at the upper edge of the eaves side of the drain port 6. It is. According to such a configuration, the check valve 7 is swingably suspended at the upper end portion, and is slightly opened due to the slope of the roof. Thus, the check valve 7 is opened in the natural state. As a result, it is possible to effectively drain drained rainwater, while the valve plate 8 can be swung and closed by wind and rain that is about to enter the check valve 7, effectively preventing rainwater from entering. can do.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. 1 is a schematic perspective view, FIG. 2 is a schematic cross-sectional view, FIG. 3 is a schematic front view, and FIG. 4 is a check valve.
[0011]
The metal roof board 10 is bent into a square wave shape by roll forming, and a synthetic resin foam layer 12 is filled and foamed between the roof board 10 and the flat metal plate 11 to insulate the roof as a roof material. A panel 13 is configured.
[0012]
The synthetic resin foam layer 12 and the metal plate 11 on the lower surface of the roof plate 10 at the eave side end portion of the heat insulating roof panel 13 are removed, and the eave side end portion of the roof plate 10 is exposed. Although this invention was implemented to the above-mentioned heat insulation roof panel 13, it is a folded-plate roof material without the synthetic resin foam layer 12, and rock wool or a fiber-like normal space between upper and lower folded plates with a double folded plate structure. The present invention may be applied to a roof material having a configuration filled with a heat insulating material.
[0013]
When connecting the heat insulating roof panels 13 and 13 in the direction of the building, as shown in FIGS. 2 and 3, the heat insulating roof panels 13 and 13 on the eave side and the building side are placed on the main building 14, and the heat insulation on the eave side is performed. The eaves-side end portion of the ridge-side heat-insulating roof panel 13 is overlapped with the ridge-side end portion of the roof panel 13. The second packing P <b> 2 is laid on the intermediate portion in the ridge direction, and the third packing P <b> 3 is laid on the ridge side portion of the lap connection portion 3 over the entire length of the lap connection portion 3 in the eave length direction.
[0014]
By the way, the drainage opening 4 that also serves as ventilation is formed in the valley portion of the first packing P1. A vent hole 5 is formed in the peak portion of the second packing P2, and a drain port 6 is also formed in the trough portion. The third packing P3 performs uniform sealing over the entire length. Such 1st packing P1 thru | or 3rd packing P3 is sponge-like packings, such as EPDM, silicone rubber, urethane, a vinyl chloride, for example.
[0015]
According to such a configuration, the difference in atmospheric pressure inside and outside the first packing P1 is eliminated by the drainage opening 4 which also serves as ventilation of the first packing P1. Further, the difference in atmospheric pressure between the inside and outside of the second packing P2 is eliminated by the vent hole 5 at the peak portion and the drain port 6 at the valley portion of the second packing P2. In this way, it is possible to prevent a difference between the atmospheric pressure outside the overlap connection portion 3 and the internal pressure before the third packing P3, and rainwater caused by the difference between the internal and external pressures of the overlap connection portion 3 This effectively prevents the intrusion of water.
[0016]
By the way, in such a configuration, rainwater blows from the drainage opening 4 also serving as the ventilation of the first packing P1 and the drainage port 6 also serving as the ventilation formed in the valley portion of the second packing P2 to the third packing P3 side. Intrusion rainwater can be naturally drained from the drain port 6 and the drain opening 4 by the roof slope. In this way, the inflowing rainwater can be drained naturally, and therefore, the rainwater can be prevented from entering due to the pressure difference between the inside and outside of the lap connecting portion 3 to achieve a sufficient seal.
[0017]
As shown in FIGS. 1, 2, and 4, the drain port 6 of the second packing P2 is provided with a check valve 7 that allows drainage but prevents inflow of rainwater. The check valve 7 is pivotally supported by a shaft 15 at the upper edge of the eaves side of the drain port 6 so that the upper end of the valve plate 8 can swing freely on the valve case 9.
[0018]
According to such a configuration, the check valve 7 can prevent the rainwater from entering from the drain port 6 of the second packing P2, and can prevent the rainwater from blowing. Furthermore, since the check valve 7 pivotally supports the upper end portion of the valve plate 8 on the valve case 9 at the upper edge portion of the eaves side of the drain port 6, the check valve 7 is caused by the slope of the roof. Since it is opened in a natural state in this way, it is open in the natural state, so that it is possible to drain the infiltrated rainwater well, while suddenly blowing wind and rain that tries to enter the check valve 7. The valve plate 8 can be swung and closed by the penetration force, and the intrusion of rainwater can be effectively prevented.
[0019]
By the way, the arrangement of the first packing P1 to the third packing P3, the drainage opening 4 provided for ventilation in the valley portion of the first packing P1, the vent 5 formed in the peak portion of the second packing P2, the valley portion Each dimension of the drain port 6 provided also for ventilation is set as follows so that the external pressure PX and the internal pressure PY of the overlap connecting portion 3 are equal.
[0020]
The first packing P1 to the third packing P3 have the same specifications and the same material. The height HA of the first packing P1, the height HB of the second packing P2, and the height HC of the third packing P3 are 1. 0.5 cm and width W is 3.0 cm. The pitch LC between the peak 2 and the valley 3 is 30 cm. By the way, the packing heights HA, HB, and HC refer to compressed heights that are used by compressing the packing height in the free state by about 60%.
[0021]
In this case, the third packing P3 is in pressure contact with the upper and lower metal plates 10 and 10 of the overlapped connection portion 3, but in practice (microscopic), a gap of about 0.05 mm is generated. Since it is impossible to eliminate such a gap, it is intended to prevent rainwater from passing over the gap while leaving the gap.
[0022]
For this reason, the passage cross-sectional area S1 between the second packing P2 and the third packing P3 compared to the gap area S on the upper and lower surfaces of one pitch of the third packing 3,
Passage cross-sectional area S2 between the first packing P1 and the second packing P2,
The cross-sectional area S3 of the vent 5 of the peak portion 2 of the second packing P2,
The cross-sectional area S4 of the drainage opening 4 that also serves as ventilation of the valley 1 of the first packing P1
Is set to be 5 to 7 times or more.
[0023]
Therefore, the interval LA between the first packing P1 and the second packing P2 is 7.5 cm, and the interval LB between the second packing P2 and the third packing P3 is 17.5 cm. The width WA of the drainage opening 4 also serving as the ventilation of the first packing P1 is 5.0 cm. The width WB of the vent 5 in the peak 2 of the second packing P2 is 2.0 cm. The pitch LC between the peak 2 and the valley 3 is 30 cm.
[0024]
Therefore,
S = 2 × LC × 0.05 mm = 2 × 30 cm × 0.005 cm = 0.3 cm ²
S1 = LB × HC = 17.5 cm × 1.5 cm = 26.25 cm ²
S2 = LA × HB = 7.5 cm × 1.5 cm = 11.25 cm ²
S3 = WB × HB = 2.0 cm × 1.5 cm = 3.0 cm ²
S4 = WA × HA = 5.0 cm × 1.5 cm = 7.5 cm ²
From the isobaric theory, all of S1 to S4 are 5 times or more of S.
That is, S × 5 << S1, S2, S3, and S4 are satisfied from 0.3 × 5 << 3.0 to 26.25.
[0025]
Incidentally, the height m of the check valve 7 is equal to the height HB of the second packing P2, the length n is equal to the width W of the packing, and the thickness t of the valve case 9 is 2 mm.
[0026]
In the present invention, the cross-sectional shapes of the eaves-side roofing material A1 and the ridge-side roofing material A2 do not need to match, as shown in FIGS. 5 (a), 5 (b), and 5 (c), for example. It ’s good. And the cross-sectional shape of the 1st packing P1 thru | or the 3rd packing P3 becomes a shape which accumulated the roof material A1 on the eaves side, and the roof material A2 on the ridge side.
[0027]
【The invention's effect】
In claim 1, a roof material is formed by alternately forming valleys and mountain portions continuous in the eave building direction in the eave length direction, and the roof on the ridge side is formed on the ridge side end of the eave side roof material. A roof material connection structure that overlaps the eaves side edge of the material, and the first packing is placed on the eave side of the overlap connection part of the eaves side roof material and the roof side roof material, and the eaves building direction of the overlap connection part A second packing is provided in the middle part of the lap and a third packing is provided on the ridge side of the lap connection part over the entire length in the eave length direction of the lap connection part, and a drainage opening that serves as ventilation is provided in the valley part of the first packing. Since the vent is formed in the peak portion of the second packing and the drainage port is also formed in the trough portion, the pressure inside and outside of the first packing is reduced by the drainage opening also serving as the ventilation of the first packing. The air pressure inside and outside of the second packing is eliminated by the vent of the peak portion of the second packing and the drain port of the valley portion of the second packing. The difference is eliminated, and as a result, the difference between the atmospheric pressure outside the lap connecting portion and the internal pressure before the third packing is prevented, and the pressure is almost equal. It is possible to prevent the intrusion of rainwater due to suction due to the difference in the atmospheric pressure, that is, the seal breakage due to the negative pressure can be effectively prevented.
[0028]
Moreover, rainwater that has entered the third packing side from the drainage opening that also serves as the ventilation of the first packing and the ventilation opening that is formed in the valley portion of the second packing is caused by the roof slope from the drainage opening and the drainage opening. It can be drained naturally, and thus the rainwater that flows in can be drained naturally.
[0029]
Thus, there is an advantage that rainwater can be effectively prevented from entering due to the pressure difference between the inside and outside of the overlapped connection portion and sufficient sealing can be achieved.
[0030]
In claim 2, since the drainage port of the second packing is provided with a check valve that allows drainage but prevents inflow of rainwater, in addition to the effect of claim 1, the drainage port of the second packing Intrusion of rainwater can be prevented, and there is an advantage that rainwater blowing can be prevented.
[0031]
In claim 3, since the check valve pivotally supports the upper end of the valve plate on the valve case at the upper edge of the eaves side of the drainage port, in addition to the effect of claim 2, The check valve is swingably suspended at the upper end, and is slightly opened due to the slope of the roof. While drainage can be performed satisfactorily, there is an advantage that the valve plate can be swung and closed by wind and rain to enter the check valve, effectively preventing rainwater from entering.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing an embodiment of the present invention.
FIG. 2 is a schematic sectional view of the above.
FIG. 3 is a front sectional view of the eave length direction of the above.
4A is a perspective view, FIG. 4B is a perspective view of a valve case, and FIG. 4C is an explanatory view showing the operation.
5A and 5B show another embodiment of the present invention, and FIGS. 5A, 5B, and 5C are schematic cross-sectional views in an eave length direction.
FIG. 6 is a schematic cross-sectional view of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Valley part 2 Mountain part 3 Overlapping part 4 Drainage opening 5 which served as ventilation 5 Vent 6 Drain 7 Check valve

Claims

The roof material is formed by alternately forming valleys and mountains continuous in the eaves ridge direction in the eave length direction, and the eaves side edge of the ridge side roof material is formed at the ridge side edge of the eave side roof material. The first packing is provided on the eaves side of the eaves side roofing material and the roofing material on the eaves side, and the second packing is provided on the intermediate part in the eaves ridge direction of the eaves connection. The packing is provided on the ridge side portion of the overlapping connection portion over the entire length in the eave length direction of the overlapping connection portion, and a drain opening that also serves as ventilation is formed in the valley portion of the first packing, and the second packing A roof material connection structure characterized in that a vent is formed in the mountain portion and a drainage port is formed in the valley portion.

2. The roof material connection structure according to claim 1, wherein a drain valve of the second packing is provided with a check valve that allows drainage but prevents inflow of rainwater.

3. The roof material connection structure according to claim 2, wherein the check valve is configured such that the upper end portion of the valve plate is pivotally supported by the valve case at the upper edge portion of the eaves side of the drain outlet.