JP3930308B2

JP3930308B2 - Rain gutter

Info

Publication number: JP3930308B2
Application number: JP2001377556A
Authority: JP
Inventors: 篤史塚本; 尚人船引; 直己藪田
Original assignee: Takiron Co Ltd
Current assignee: Takiron Co Ltd
Priority date: 2001-12-11
Filing date: 2001-12-11
Publication date: 2007-06-13
Anticipated expiration: 2021-12-11
Also published as: JP2003176606A

Description

【０００１】
【発明の属する技術分野】
本発明は雨樋に関し、詳しくは、前側板に降りかかる雨水が底板まで回り込まないように水切りできる雨樋と、水切り突起の先端で大きい水滴が成長しにくい雨樋に関する。
【０００２】
【従来の技術】
従来の雨樋は、前側板に降りかかる雨水が前側板を伝って底板まで回り込むため、雨水の回り込んだ痕跡が底板に残り、底板が汚れたり、雨が止んだ後でも底板から水滴が落下するという問題があった。特に、最近の雨樋は、前側板の上部を後側へ傾斜させたものが多く、この傾斜させた前側板上部には多量の雨水が降りかかって前側板を伝い落ちるため、この問題を無視することはできない。
【０００３】
かかる事情から、その対応策として図７，図８に示すような雨樋が開発されている。即ち、図７に示す雨樋は、「く」字状に屈曲する前側板１０１の中間屈曲部に水受部１０２を形成し、後側へ傾斜した前側板上部１０１ａに降りかかって伝い落ちる雨水を該水受部１０２で受け止めるようにしたものである。また、図８に示す雨樋は、前側板１０１の下端部に内側へ突入する段部１０３を形成し、前側板１０１に降りかかって伝い落ちる雨水を該段部１０３で水切りして落下させるようにしたものである。
【０００４】
けれども、図７に示す雨樋は、前側板下部１０１ｂに降りかかって伝い落ちる雨水を受け止めることができないため、この前側板下部１０１ｂを伝い落ちる雨水が底板１０５まで回り込んで底板１０５を汚したり、水滴が落下するという問題があった。また、図８に示す雨樋は、段部１０３の水切り作用が不充分であるため、やはり雨水の一部が段部１０３を伝って底板１０５まで回り込み、底板１０５を汚したり水滴が落下するという問題があった。
【０００５】
そこで、本発明者らは、図９に示すように、前側板１０１の中間屈曲部と下端に、下向きに突き出す水切り突起１０４ａ，１０４ｂをそれぞれ形成した雨樋を試作した。この雨樋は、前側板上部１０１ａに降りかかって伝い落ちる雨水が水切り突起１０４ａにより水切りされて落下すると共に、前側板下部１０１ｂに降りかかって伝い落ちる雨水が水切り突起１０４ｂにより水切りされて落下するため、上記の図７，図８に示す雨樋が有する問題を一挙に解決し得るものである。
【０００６】
【発明が解決しようとする課題】
しかしながら、図９に示す雨樋では、前側板上部１０１ａに降りかかって伝い落ちる雨水が、図１０に示すように、水切り突起１０４ａの先端で大きい水滴に成長して真下に落下するため、その落下点の地面が侵食されて穴があくという問題があり、落下点にベランダや廊下の手摺等が存在する場合は、落下する水滴によって耳障りな衝撃音が発生するという問題があった。
【０００７】
また、図９に示す雨樋は、前側板下部１０１ｂに降りかかった雨水がゆっくりと前側板下部１０１ｂの表面を伝い落ちる場合には、雨水が水切り突起１０４ｂの先端で水滴となって略真下に落下するけれども、雨水が前側板下部１０１ｂの表面を速やかに伝い落ちる場合には、図１１に矢印Ｖで示すように、雨水が後方斜め下側に向かって放物線を描くように落下するため、背後の家屋外壁面に雨水がかかって家屋外壁面が濡れたり汚れたりする心配があった。
【０００８】
本発明は上記の問題に対処すべくなされたもので、その目的とするところは、水切り突起の先端で大きい水滴が成長しにくい雨樋と、水切り突起から落下する雨水が背後の家屋外壁面にかかりにくい雨樋を提供することにある。
【０００９】
【課題を解決するための手段】
上記目的を達成するため、本発明の請求項１に係る雨樋は、底板の前後両側端に前側板と後側板が一体に形成された雨樋であって、その前側板の下端から下向きに突き出す水切り突起が雨樋全長に亘って設けられ、前側板の下端近傍部から水切り突起の先端に至る表面が緩やかなＳ字状曲面に形成されていることを特徴とするものである。
【００１０】
この雨樋のように、前側板の下端近傍部から水切り突起の先端に至る表面が緩やかなＳ字状曲面に形成されていると、前側板の表面を伝い落ちる雨水の流れがＳ字状曲面のところで最終的に下向きに変化し、前側板下端の水切り突起の先端から落下する雨水の落下方向が下向きに変更されるため、雨水は後方斜め下側に向かって落下し難くなる。そのため、前側板下端の水切り突起から落下した雨水が雨樋背後の家屋外壁面にかかって、家屋外壁面を濡らしたり汚したりする心配が少なくなる。
【００１１】
次に、本発明の請求項２に係る雨樋は、上記請求項１の雨樋において、その底板から水切り突起の先端までの突出寸法が１．５ｍｍ以上であることを特徴とするものである。
【００１２】
この雨樋のように、水切り突起の突出寸法が１．５ｍｍ以上であると、前側板を伝い落ちる雨水が水切り突起を乗り越えて底板へ回り込むのをほぼ確実に阻止できるため、水切り性能が一層向上する。
【００１３】
次に、本発明の請求項３に係る雨樋は、底板の前後両側端に前側板と後側板が一体に形成された雨樋であって、その前側板の中間部及び／又は下端から下向きに突き出す水切り突起が雨樋全長に亘って設けられ、水切り突起の先端が０〜１．５ｍｍの幅を有する略水平面に形成されると共に、水切り突起の後面が後方斜め上側へ立ち上がる立上り面に形成されていることを特徴とするものである。
【００１４】
この雨樋のように、水切り突起の先端が０〜１．５ｍｍの幅を有する略水平面に形成され、且つ、水切り突起の後面が後方斜め上側へ立ち上がる立上り面に形成されていると、降雨中水を切ってしまうため前側板を伝い落ちてくる雨水が水切り突起の先端で大きい水滴に成長しにくいので、水切り突起から小さな水滴が落下するようになる。そのため、降雨後落下点の地面の侵食が減少して穴があきにくくなり、また、落下点にベランダや廊下の手摺等が存在しても、落下する水滴によって発生する耳障りな衝撃音が小さくなる。
【００１５】
【発明の実施の形態】
以下、図面を参照して本発明の具体的な実施形態を詳述する。
【００１６】
図１は本発明の一実施形態に係る雨樋の断面図、図２は図１の円Ａで囲んだ部分の拡大図、図３は同雨樋を家屋の軒先に取付けたところを示す断面図である。
【００１７】
図１に示す雨樋は、ポリ塩化ビニルやポリカーボネート等の熱可塑性合成樹脂で押出成形された肉厚が１．０〜２．０ｍｍ程度の雨樋であって、底板１の前後両側端には前側板２と後側板３が一体に形成されている。
【００１８】
この雨樋は、前側板２の上部２ａが後方斜め上側へ傾斜し、前側板２の下部２ｂが前方斜め上側へ傾斜している。そして、この前側板２の上端内側には中空の耳部４が形成され、また、後側板３の上端内側にも中空の耳部５が形成されている。
【００１９】
この前側板２の下端には、下向きに突き出す水切り突起６が雨樋全長に亘って形成されている。図２に示すように、この水切り突起６は先端（下端）が鋭角に尖った略三角形の断面形状を有する突起であって、前側板２（前側板下部２ｂ）の下端近傍部２ｃから水切り突起６の先端に至る表面が緩やかなＳ字状曲面２ｄに形成されている。即ち、前側板２の下端近傍部２ｃの表面は凸湾曲し、水切り突起６の先端に至る表面（前側面）は凹湾曲して、全体として緩やかなＳ字状曲面２ｄが形成されている。そして、このＳ字状曲面２ｄの下端部分は下向きに湾曲している。この下端部分の傾斜角度θは４５°以上、９０°以下であることが望ましい。
【００２０】
また、この前側板２の段状に屈曲された中間部２ｅには、前方斜め下側に突き出す水切り突起７が雨樋全長にわたって形成されている。尚、この水切り突起７については、後述する他の実施形態の雨樋のところで詳しく説明する。
【００２１】
上記の雨樋は、図３に示すように、軒先の鼻隠し８に固定された合成樹脂製の雨樋取付具９の前耳支持部９ａと後耳支持部９ｂで、雨樋の前側板２上端の耳部４と後側板３上端の耳部５を下方から支持させると共に、雨樋前側板２の段状の屈曲中間部２ｅを前耳支持部の下端９ｃで押えることにより、浮き上って外れないように軒先に取付けられる。
【００２２】
このように雨樋を軒先に取付けると、その前側板上部２ａに降りかかって伝い落ちる雨水は、前側板２の中間部の水切り突起７により水切りされて、矢印Ｗで示すように該突起７の先端から落下し、また、前側板下部２ｂに降りかかって伝い落ちる雨水は、前側板２の下端の水切り突起６で水切りされて落下する。従って、前側板２に降りかかった雨水は底板１の下面まで回り込むことがないので、底壁１が雨水の痕跡によって汚れなくなり、また、雨が止んだ後に雨水が底板１から水滴となって落下することもなくなる。
【００２３】
特に、この雨樋のように前側板２の下端近傍部２ｃから水切り突起６の先端に至る表面が緩やかなＳ字状曲面２ｄに形成されていると、前側板下部２ｂの表面を伝い落ちる雨水の流れが、図２に矢印Ｘで示すようにＳ字状曲面２ｄに沿って変化し、最終的に水切り突起６の先端から落下する雨水の落下方向が下向きに変更されるため、雨水が後方斜め下側に向かって落下し難くなる。そのため、前側板２下端の水切り突起６から落下した雨水が、雨樋背後の家屋外壁面１０にかかって家屋外壁面１０を濡らしたり汚したりする心配が少なくなる。
【００２４】
また、この雨樋のようにＳ字状曲面２ｄが形成されていると、雨水がＳ字状曲面２ｄを伝い落ちる速さ（雨量の多少によって速さが変わる）によって、水切り突起６から落下する雨水の落下方向が図３に矢印Ｙ，Ｚで示すように若干異なるため、雨水の落下点が分散して地面の侵食を減少させることも可能となる。また、降雨後に水切り突起６に伝い落ちてきた雨水は、その先端の鋭角部分により小さな水滴となって落下するため、地面を侵食する恐れはない。
【００２５】
上記水切り突起６の底板１からの突出寸法Ｈは１．５ｍｍ以上であることが望ましく、このような突出寸法にすると、前側板２（前側板下部２ｂ）を伝い落ちる雨水が水切り突起６を乗り越えて底板１の下面へ回り込むのを確実に阻止できるため、水切り性能が一層向上する。突出寸法Ｈの上限はいくらでもよいが、４．０ｍｍまでとすることが望ましく、これより大きい突出寸法にしても水切り効果の更なる向上は見られない。さらに望ましい突出寸法Ｈの上限は３．０ｍｍ以下である。
【００２６】
図４は本発明の他の実施形態に係る雨樋の断面図、図５は図４の円Ｂで囲んだ部分の拡大図、図６は図４の円Ｃで囲んだ部分の拡大図である。
【００２７】
この雨樋も、全体的な構造は前述の雨樋と実質的に同様であり、底板１の前後両側端に前側板２と後側板３が一体形成されている。そして、前側板２の上部２ａは後方斜め上側へ、前側板２の下部２ｂは前方斜め上側へそれぞれ傾斜し、この前側板２と後側板３のそれぞれの上端には、中空の耳部４，５が形成されている。
【００２８】
また、この前側板２の段状に屈曲された中間部２ｅには、ほぼ下向きに突き出す水切り突起７０が雨樋全長に亘って形成されており、前側板２の二重壁構造とされた下端にも、下向きに突き出す水切り突起６０が雨樋全長に亘って形成されている。
【００２９】
前側板２の中間部２ｅに形成された水切り突起７０は、図５に拡大して示すように、該突起７０の先端の前面が０〜１．５ｍｍの幅を有する略水平面７０ａに形成されており、該突起７０の後面が後方斜め上側へ立ち上がる立上り面７０ｂに形成されている。ここに「立上り面」とは、湾曲面、傾斜面、これらが結合した複合面、のいずれをも含む広概念の用語であり、この水切り突起７０の立上り面は、湾曲面と傾斜面が結合した複合面となっている。そして、水切り突起７０は前側板下部２ｂの上端部から距離Ｌ（１０〜４０ｍｍ、好ましくは１０〜２０ｍｍ）だけ離して設けられている。そのため、水切り突起７０に水滴ができても、前側板下部２ｂに移行することがない。
【００３０】
また、図６に拡大して示すように、前側板２の下端に形成された水切り突起６０も上記の水切り突起７０と同様に、突起の先端が０〜１．５ｍｍの幅を有する略水平面６０ａに形成されており、該突起７０の後面が、傾斜角の異なる二つの傾斜面を結合した立上り面６０ｂに形成されている。
【００３１】
この雨樋は、水切り突起７０，６０が上記のような略水平面７０ａ，６０ａと立上り面７０ｂ，６０ｂを有する先細り形状となっているため、降雨中に雨水を切ってしまうので、降雨後に前側板上部２ａ及び前側板下部２ｂを伝い落ちてくる雨水が、水切り突起７０，６０の先端で大きい水滴に成長しにくい。従って、前側板２に降りかかって伝い落ちる雨水が底板１に回り込み難く、しかも、水切り突起７０，６０から小さな水滴が落下するようになるため、水滴落下点の地面の侵食作用が弱められて穴があきにくくなる。また、落下点にベランダや廊下の手摺等が存在しても、落下する水滴によって発生する耳障りな衝撃音が小さくなる。特に風があると、小さな水滴が風により吹き飛ばされて定まった箇所に落下せず、侵食が少なくなり、衝撃音も減少する。
【００３２】
水切り突起７０，６０の先端の略水平面７０ａ，６０ａの幅が１．５ｍｍより広くなると、水切り突起７０，６０の先端で成長する水滴が大きくなって、前側板２に降りかかって伝い落ちる雨水が底板に回り込み易くなったり、落下水滴による地面の侵食作用や耳障りな衝撃音を十分に弱めることが難しくなるため、本発明の目的を達成することが困難になる。略水平面７０ａ，６０ａの更に望ましい幅は０〜１．０ｍｍである。
【００３３】
尚、前述した図１〜図３に示す雨樋の水切り突起７も、上記の水切り突起７０と同様の構成であり、それゆえ前述した雨樋も水切り突起７から落下する水滴によって地面が侵食されにくく、また、耳障りな衝撃音を低減することもできる。
【００３４】
【発明の効果】
以上の説明から明らかなように、本発明の雨樋は水切り性能が高く、前側板に降りかかって伝い落ちる雨水を底板に回り込まないように水切りして、雨水の痕跡による底板の汚れや雨が止んだ後の水滴の落下を防止することができ、また、緩やかなＳ字状曲面により水切り突起からの雨水の落下方向を変更して、家屋外壁面を落下する雨水で濡らしたり汚したりするのを防止することもでき、更に、降雨後水切り突起から落下する水滴を小さくして、地面の侵食や耳障りな衝撃音を低減させることもできるといった顕著な効果を奏する。
【図面の簡単な説明】
【図１】本発明の一実施形態に係る雨樋の断面図である。
【図２】図１の円Ａで囲んだ部分の拡大図である。
【図３】図３は同雨樋を家屋の軒先に取付けたところを示す断面図である。
【図４】本発明の他の実施形態に係る雨樋の断面図である。
【図５】図４の円Ｂで囲んだ部分の拡大図である。
【図６】図４の円Ｃで囲んだ部分の拡大図である。
【図７】従来の雨樋の一例を示す概略断面図である。
【図８】従来の雨樋の他の例を示す概略断面図である。
【図９】従来の雨樋の更に他の例を示す概略断面図である。
【図１０】図９の円Ｄで囲んだ部分の拡大図である。
【図１１】図９の円Ｅで囲んだ部分の拡大図である。
【符号の説明】
１底板
２前側板
２ａ前側板上部
２ｂ前側板下部
２ｃ前側板の下端近傍部
２ｄＳ字状曲面
２ｅ前側板の段状に屈曲された中間部
３後側壁
６，７，６０，７０水切り突起
６０ａ，７０ａ水切り突起の先端の略水平面
６０ｂ，７０ｂ水切り突起の立上り面
Ｈ水きり突起の突出寸法[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rain gutter, and more particularly, to a rain gutter that can drain water so that rain water that falls on a front side plate does not reach the bottom plate, and a rain gutter that is difficult for large water droplets to grow at the tip of the water drain projection.
[0002]
[Prior art]
In conventional rain gutters, rainwater that falls on the front plate travels down to the bottom plate along the front plate, leaving traces of rainwater around the bottom plate, soiling the bottom plate, and water drops falling from the bottom plate even after the rain has stopped. There was a problem. In particular, most of the recent rain gutters have the upper part of the front plate inclined to the rear side, and a large amount of rain water falls on the inclined front plate and flows down the front plate, so this problem is ignored. I can't do it.
[0003]
Under such circumstances, rain gutters as shown in FIGS. 7 and 8 have been developed as countermeasures. That is, the rain gutter shown in FIG. 7 has a water receiving portion 102 formed at an intermediate bent portion of the front side plate 101 bent in a “<” shape, and falls on the front side plate upper portion 101 a inclined rearward and falls down. Is received by the water receiving portion 102. In addition, the rain gutter shown in FIG. 8 is formed with a step portion 103 that protrudes inwardly at the lower end portion of the front side plate 101, so that rain water that falls on the front side plate 101 and drains down is dropped by the step portion 103 and dropped. It is a thing.
[0004]
However, since the rain gutter shown in FIG. 7 cannot catch the rain water that falls on the front side plate lower part 101b, the rain water that travels down the front side plate lower part 101b goes around to the bottom plate 105 to contaminate the bottom plate 105, There was a problem of water drops falling. In addition, since the rain gutter shown in FIG. 8 has insufficient draining action of the step portion 103, part of the rainwater also travels along the step portion 103 to the bottom plate 105, and the bottom plate 105 is soiled or water drops fall. There was a problem.
[0005]
Therefore, the inventors made a prototype of a rain gutter having draining protrusions 104a and 104b protruding downward at the intermediate bent portion and the lower end of the front side plate 101 as shown in FIG. In this rain gutter, rain water falling on the front plate upper part 101a is drained by the draining projection 104a and dropped, and rain water falling on the front plate lower part 101b is drained by the draining projection 104b and falls. The problems of the rain gutters shown in FIGS. 7 and 8 can be solved all at once.
[0006]
[Problems to be solved by the invention]
However, in the rain gutter shown in FIG. 9, the rain water that falls on the front side plate upper part 101a grows into a large water droplet at the tip of the draining protrusion 104a and falls right below as shown in FIG. There is a problem that the ground of the point is eroded and a hole is formed, and when there is a veranda or a handrail in the hallway at the falling point, there is a problem that an irritating impact sound is generated by the falling water droplet.
[0007]
In addition, the rain gutter shown in FIG. 9 has rainwater that has fallen on the front plate lower portion 101b slowly flowing down the surface of the front plate lower portion 101b, and the rainwater becomes a drop of water at the tip of the draining projection 104b. Although it falls, when rainwater quickly travels down the surface of the front plate lower portion 101b, as shown by an arrow V in FIG. There was a concern that the outdoor wall surface of the house would get wet and dirty due to rain water.
[0008]
The present invention has been made to cope with the above-mentioned problems, and the purpose of the present invention is to provide a rain gutter in which large water droplets are difficult to grow at the tip of the draining protrusion and rain water falling from the draining protrusion on the outdoor wall surface of the house behind. It is to provide rain gutters that are difficult to catch.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a rain gutter according to claim 1 of the present invention is a rain gutter in which a front side plate and a rear side plate are integrally formed on both front and rear side ends of a bottom plate, and faces downward from the lower end of the front side plate. The protruding draining protrusion is provided over the entire length of the gutter, and the surface from the vicinity of the lower end of the front side plate to the tip of the draining protrusion is formed into a gentle S-shaped curved surface.
[0010]
If the surface from the vicinity of the lower end of the front side plate to the tip of the draining projection is formed in a gentle S-shaped curved surface like this rain gutter, the flow of rainwater that flows along the surface of the front side plate is the S-shaped curved surface. By the way, it finally changes downward, and the falling direction of the rainwater falling from the tip of the draining projection at the lower end of the front plate is changed downward, so that it becomes difficult for the rainwater to fall diagonally downward. Therefore, there is less concern that rainwater falling from the draining protrusion at the lower end of the front side plate will get on the outdoor wall surface behind the rain gutter and wet or dirty the outdoor wall surface.
[0011]
Next, the rain gutter according to claim 2 of the present invention is characterized in that in the rain gutter of claim 1 above, the projecting dimension from the bottom plate to the tip of the draining projection is 1.5 mm or more. .
[0012]
Like this rain gutter, if the projection dimension of the draining protrusion is 1.5 mm or more, it is possible to almost reliably prevent rainwater that runs down the front plate from passing over the draining protrusion and wrapping around the bottom plate, thus further improving the draining performance. To do.
[0013]
Next, a rain gutter according to claim 3 of the present invention is a rain gutter in which a front side plate and a rear side plate are integrally formed on both front and rear side ends of a bottom plate, and is directed downward from an intermediate portion and / or a lower end of the front side plate. A draining protrusion protruding on the rain gutter is provided over the entire length of the gutter, and the tip of the draining protrusion is formed on a substantially horizontal surface having a width of 0 to 1.5 mm, and the rear surface of the draining protrusion is formed on a rising surface that rises obliquely upward to the rear. It is characterized by being.
[0014]
Like this rain gutter, when the tip of the draining projection is formed in a substantially horizontal plane having a width of 0 to 1.5 mm, and the rear surface of the draining projection is formed on a rising surface that rises obliquely upward, it is raining. Since the rainwater that runs down the front side plate does not grow into large droplets at the tip of the draining projection because it drains water, small droplets will fall from the draining projection. As a result, erosion of the ground at the falling point after raining is reduced, making it difficult to perforate, and even if a veranda or a handrail in the corridor is present at the falling point, the annoying impact sound generated by the falling water droplets is reduced. .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
1 is a cross-sectional view of a gutter according to an embodiment of the present invention, FIG. 2 is an enlarged view of a portion surrounded by a circle A in FIG. 1, and FIG. 3 is a cross-sectional view showing the gutter attached to the eaves of a house. FIG.
[0017]
The rain gutter shown in FIG. 1 is a gutter having a thickness of about 1.0 to 2.0 mm that is extruded with a thermoplastic synthetic resin such as polyvinyl chloride or polycarbonate. The front side plate 2 and the rear side plate 3 are integrally formed.
[0018]
In this gutter, the upper part 2a of the front side plate 2 is inclined rearward and obliquely upward, and the lower part 2b of the front side plate 2 is inclined obliquely upward and forward. A hollow ear portion 4 is formed inside the upper end of the front side plate 2, and a hollow ear portion 5 is also formed inside the upper end of the rear side plate 3.
[0019]
On the lower end of the front side plate 2, a draining projection 6 protruding downward is formed over the entire length of the gutter. As shown in FIG. 2, the draining projection 6 is a projection having a substantially triangular cross-sectional shape with a sharp tip (lower end), and the draining projection from the lower end vicinity 2c of the front plate 2 (front plate lower portion 2b). The surface reaching the tip of 6 is formed into a gentle S-shaped curved surface 2d. That is, the surface of the lower end vicinity portion 2c of the front side plate 2 is convexly curved, and the surface (front side surface) reaching the tip of the draining projection 6 is concavely curved to form a gentle S-shaped curved surface 2d as a whole. The lower end portion of the S-shaped curved surface 2d is curved downward. The inclination angle θ of the lower end portion is desirably 45 ° or more and 90 ° or less.
[0020]
Further, a draining projection 7 protruding diagonally forward and downward is formed on the middle portion 2e of the front side plate 2 bent in a step shape over the entire length of the rain gutter. The draining protrusion 7 will be described in detail in the rain gutter of another embodiment described later.
[0021]
As shown in FIG. 3, the rain gutter is composed of the front ear support portion 9a and the rear ear support portion 9b of the synthetic resin rain gutter fixture 9 fixed to the eaves nose cover 8 on the front side plate of the gutter. 2 The upper end ear 4 and the rear end plate 3 upper end ear 5 are supported from below, and the stepped bent middle portion 2e of the rain gutter front side plate 2 is pressed by the lower end 9c of the front ear support portion to lift up. It is attached to the eaves so as not to come off.
[0022]
When the rain gutter is attached to the eaves in this way, the rain water falling on the front side plate upper portion 2a is drained by the draining projection 7 in the middle portion of the front side plate 2, and as shown by the arrow W, The rainwater that falls from the tip and falls on the front plate lower portion 2 b is drained by the draining projection 6 at the lower end of the front plate 2 and falls. Therefore, since rainwater that has fallen on the front plate 2 does not reach the lower surface of the bottom plate 1, the bottom wall 1 is not soiled by traces of rainwater, and rainwater falls from the bottom plate 1 as water drops after the rain stops. You do n’t have to.
[0023]
In particular, when the surface from the lower end vicinity 2c of the front plate 2 to the tip of the draining projection 6 is formed into a gentle S-shaped curved surface 2d like this rain gutter, rainwater that flows down the surface of the front plate lower portion 2b 2 changes along the S-shaped curved surface 2d as indicated by an arrow X in FIG. 2, and finally the falling direction of the rainwater falling from the tip of the draining projection 6 is changed downward, so that the rainwater flows backward. It becomes difficult to fall down diagonally. Therefore, there is less concern that rainwater falling from the draining protrusion 6 at the lower end of the front side plate 2 will get on the outdoor wall surface 10 behind the rain gutter and wet or dirty the outdoor wall surface 10.
[0024]
Further, when the S-shaped curved surface 2d is formed like this rain gutter, the rainwater falls from the draining projection 6 at a speed that the rainwater travels down the S-shaped curved surface 2d (the speed varies depending on the amount of rain). Since the falling direction of rainwater is slightly different as indicated by arrows Y and Z in FIG. 3, the rainwater falling points are dispersed to reduce erosion of the ground. Moreover, since rain water that has fallen down to the draining projection 6 after the rain falls as a small water droplet at the acute angle portion at the tip thereof, there is no possibility of eroding the ground.
[0025]
The projection dimension H of the draining projection 6 from the bottom plate 1 is desirably 1.5 mm or more. When such a projection dimension is set, rainwater that passes through the front plate 2 (front plate lower portion 2b) gets over the drain projection 6. Therefore, it is possible to reliably prevent the bottom plate 1 from wrapping around the lower surface, thereby further improving the draining performance. The upper limit of the protrusion dimension H is not limited, but is preferably up to 4.0 mm, and even if the protrusion dimension is larger than this, no further improvement of the draining effect is observed. Furthermore, the upper limit of the desirable protrusion dimension H is 3.0 mm or less.
[0026]
4 is a cross-sectional view of a rain gutter according to another embodiment of the present invention, FIG. 5 is an enlarged view of a portion surrounded by a circle B in FIG. 4, and FIG. 6 is an enlarged view of a portion surrounded by a circle C in FIG. is there.
[0027]
The overall structure of this gutter is substantially the same as that of the gutter described above, and the front side plate 2 and the rear side plate 3 are integrally formed at the front and rear side ends of the bottom plate 1. The upper portion 2a of the front plate 2 is inclined obliquely upward to the rear, and the lower portion 2b of the front plate 2 is inclined obliquely upward to the front, and the upper ends of the front plate 2 and the rear plate 3 are respectively provided with hollow ears 4, 5 is formed.
[0028]
Further, a draining projection 70 protruding substantially downward is formed on the intermediate portion 2e bent in a step shape of the front side plate 2 over the entire length of the rain gutter, and the lower end of the front side plate 2 having a double wall structure. In addition, a draining protrusion 60 protruding downward is formed over the entire length of the gutter.
[0029]
As shown in an enlarged view in FIG. 5, the draining projection 70 formed on the intermediate portion 2 e of the front side plate 2 is formed on a substantially horizontal plane 70 a having a front surface at the tip of the projection 70 having a width of 0 to 1.5 mm. In addition, the rear surface of the projection 70 is formed on a rising surface 70b that rises obliquely rearward and upward. Here, the “rising surface” is a broad term including both a curved surface, an inclined surface, and a composite surface in which these surfaces are combined. The rising surface of the draining projection 70 is a combination of the curved surface and the inclined surface. It has become a complex surface. The draining projection 70 is provided at a distance L (10 to 40 mm, preferably 10 to 20 mm) away from the upper end of the front plate lower part 2b. Therefore, even if water droplets are formed on the draining projection 70, the front plate lower portion 2b does not move.
[0030]
Further, as shown in an enlarged view in FIG. 6, the draining protrusion 60 formed at the lower end of the front plate 2 is also a substantially horizontal plane 60 a in which the tip of the protrusion has a width of 0 to 1.5 mm, similarly to the draining protrusion 70 described above. The rear surface of the projection 70 is formed as a rising surface 60b obtained by combining two inclined surfaces having different inclination angles.
[0031]
Since this rain gutter has a tapered shape in which the draining projections 70, 60 have the substantially horizontal surfaces 70a, 60a and the rising surfaces 70b, 60b as described above, the rain water is cut off during the rain. Rainwater falling down the upper part 2a and the front plate lower part 2b is unlikely to grow into large water droplets at the tips of the draining protrusions 70 and 60. Therefore, the rain water that falls on the front side plate 2 does not easily flow around the bottom plate 1, and small water drops fall from the draining projections 70, 60, so that the erosion action of the ground at the water drop dropping point is weakened and the holes are dropped. It becomes hard to be pierced. Moreover, even if there is a veranda or a handrail in the hallway at the falling point, the annoying impact sound generated by the falling water drops is reduced. In particular, when there is wind, small water droplets are blown off by the wind and do not fall to a fixed location, erosion is reduced, and impact noise is also reduced.
[0032]
When the width of the substantially horizontal planes 70a, 60a at the tips of the draining projections 70, 60 becomes wider than 1.5 mm, the water droplets growing at the tips of the draining projections 70, 60 become large, and rainwater that falls on the front side plate 2 falls down. It becomes difficult to go around the bottom plate, and it is difficult to sufficiently weaken the erosion action of the ground caused by falling water droplets and an unpleasant impact sound, so that it is difficult to achieve the object of the present invention. A more desirable width of the substantially horizontal planes 70a and 60a is 0 to 1.0 mm.
[0033]
The draining projection 7 of the rain gutter shown in FIG. 1 to FIG. 3 has the same configuration as the draining projection 70 described above. Therefore, the rain gutter is also eroded by water droplets falling from the draining projection 7. It is difficult and can reduce annoying impact sound.
[0034]
【The invention's effect】
As is clear from the above explanation, the rain gutter of the present invention has high draining performance, drains rainwater that falls on the front side plate so that it does not go around the bottom plate, and dirt and rain on the bottom plate due to traces of rainwater It can prevent the drop of water after it has stopped, and it changes the direction of rainwater falling from the draining projection with a gentle S-shaped curved surface, so that it wets or soils the rainwater falling on the outdoor wall surface of the house. In addition, the water droplet falling from the draining projection after the rain can be reduced to reduce the erosion of the ground and the annoying impact sound.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a rain gutter according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a portion surrounded by a circle A in FIG.
FIG. 3 is a cross-sectional view showing the rain gutter attached to the eaves of a house.
FIG. 4 is a cross-sectional view of a rain gutter according to another embodiment of the present invention.
FIG. 5 is an enlarged view of a portion surrounded by a circle B in FIG. 4;
6 is an enlarged view of a portion surrounded by a circle C in FIG. 4;
FIG. 7 is a schematic sectional view showing an example of a conventional rain gutter.
FIG. 8 is a schematic sectional view showing another example of a conventional rain gutter.
FIG. 9 is a schematic sectional view showing still another example of a conventional rain gutter.
10 is an enlarged view of a portion surrounded by a circle D in FIG. 9;
11 is an enlarged view of a portion surrounded by a circle E in FIG. 9;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bottom plate 2 Front side plate 2a Front side plate upper part 2b Front side plate lower part 2c Lower end vicinity part 2d of front side plate S-shaped curved surface 2e Intermediate part 3 bent to the step shape of the front side plate 3 Rear side wall 6, 7, 60, 70 Draining protrusion 60a , 70a A substantially horizontal surface 60b, 70b of the tip of the draining projection Rising surface H of the draining projection H Projecting dimension of the draining projection

Claims

A rain gutter with a front plate and a rear plate integrally formed on both front and rear ends of the bottom plate, and a draining protrusion protruding downward from the lower end of the front plate is provided over the entire length of the gutter, and in the vicinity of the lower end of the front plate A rain gutter characterized in that the surface from the tip of the draining protrusion to the tip of the draining protrusion is formed into a gentle S-shaped curved surface.

The rain gutter according to claim 1, wherein a protruding dimension from the bottom plate to the tip of the draining protrusion is 1.5 mm or more.

A rain gutter in which a front side plate and a rear side plate are integrally formed on both front and rear ends of the bottom plate, and a draining protrusion that protrudes downward from the middle and / or lower end of the front side plate is provided over the entire length of the gutter. A rain gutter characterized in that the tip of the protrusion is formed on a substantially horizontal plane having a width of 0 to 1.5 mm, and the rear surface of the draining protrusion is formed on a rising surface that rises obliquely upward rearward.