JP4259083B2

JP4259083B2 - Tube connection method

Info

Publication number: JP4259083B2
Application number: JP2002301245A
Authority: JP
Inventors: 茂樹金尾
Original assignee: Kanaflex Corp Co Ltd
Current assignee: Kanaflex Corp Co Ltd
Priority date: 2002-10-16
Filing date: 2002-10-16
Publication date: 2009-04-30
Anticipated expiration: 2022-10-16
Also published as: JP2004138098A

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば雨水排水用の管体として使用したり、下水道用排水用の管体として使用する管体の接続方法に関し、詳しくは、外面に凹部と凸部とを交互に備え、かつ、それらが螺旋状に形成された管の複数を連結するための管体の接続方法に関する。
【０００２】
【従来の技術】
例えば道路下の雨水用の排水管として敷設する場合において、敷設距離が一本の管の長さよりも長いと、複数の管を連結することにより敷設距離に管の長さを一致させるようにしている。
そして、上記管の複数を連結する場合には、まず、連結方向で隣合う管の連結側端部の一方に、他方の連結側端部が連結方向で入り込むことができる切欠部を形成し、これら連結側端部同士が入り込んだ状態において一方の連結側端部の凹部及び凸部の端面が他方の連結側端部の凹部及び凸部の端面に合致してそれら凹部及び凸部が連続形成されるように構成してから、前記一方の連結側端部の凹部及び前記他方の連結側端部の凹部の２箇所にそれぞれ、発泡剤を注入して硬化させ、前記連結部における凸部上に凸部と同等又は凸部よりも幅狭の弾性部材を前記発泡材上を横断させながら少なくとも一周に渡って固定した後、シート状のシール部材により前記連結部全体を覆った状態において、前記連結方向で隣合う管の連結側端部同士に渡る連結部材により外方側から締め付けて該連結側端部同士をシール処理が完了した状態で連結するようにしている（例えば、特許文献１参照。）。
【０００３】
【特許文献１】
特許第３１７９７５１号公報
【０００４】
【発明が解決しようとする課題】
連結作業に使用するものとして、発泡剤や弾性部材の他、シート状のシール部材を必要とし、部品点数が多いだけでなく、一方の連結側端部の凹部及び他方の連結側端部の凹部の２箇所に発泡剤を注入して硬化させる作業と、連結部における凸部上に弾性部材を前記硬化させて構成された発泡体上を横断させながら少なくとも一周に渡って接着剤などにより固定する作業の２つの煩わしい作業の他、シート状のシール部材により前記連結部全体を覆う作業を行わなければならず、多大な作業時間を要するものであった。
【０００５】
本発明が前述の状況に鑑み、解決しようとするところは、部品点数の削減化を図ることにより接続作業を容易迅速に行うことができる管体の接続方法を提供する点にある。
【０００６】
【課題を解決するための手段】
本発明は、前述の課題解決のために、外面に凹部と凸部とを交互に備え、かつ、それらが螺旋状に形成された管の複数を連結するための管体の接続方法において、前記管体がそれぞれ前記凹部の底面の管軸芯方向中央に膨出する突出部を有し、前記連結方向で隣り合う管の連結側端部の一方に、他方の連結側端部が連結方向で入り込むことができる切欠部を形成し、該切欠部は、前記凹部が前記突出部に沿って約半周切断された形状であり、これら連結側端部同士が入り込んだ状態において一方の連結側端部の凹部及び凸部の端面が他方の連結側端部の凹部及び凸部の端面に合致してそれら凹部及び凸部が連続形成されるように構成し、前記一方の連結側端部の凹部及び前記他方の連結側端部の凹部を連続して埋める少なくとも一周を越える長さを有する谷埋部と、それら凹部の管軸芯方向両側に位置する凸部からの水の排出を阻止するために前記谷埋部の幅方向両側に備えさせた一対の山埋部とからなり、前記谷埋部の下面の管軸芯方向ほぼ中央箇所に前記管体凹部の突出部が入り込む凹部を形成してなるシール材を用い、前記シール材を前記一方の連結側端部の凹部から他方の連結側端部の凹部にかけて連続的に入り込ませることにより前記切欠部間に発生する隙間を覆うと共にともに前記一周を越えて管軸芯方向で重複するシール材の互いに向き合った側の山埋部同士が管径方向で重複して閉ループを形成した状態にした後、前記管を前記シール材と一緒に外方側から覆う連結部材を締め付けてシール材を該管の外面側へ押圧することにより、連結側端部同士をシール処理した状態で連結したことを特徴としている。
従って、管を連結する場合には、連結方向で隣合う管の連結側端部の一方に、他方の連結側端部が連結方向で入り込むことができる切欠部を切断又は成形等により形成し、これら連結側端部同士が互いに入り込んだ状態において一方の連結側端部の凹部及び凸部の端面が他方の連結側端部の凹部及び凸部の端面に合致した状態になり、凹部及び凸部が連続形成されるのである。このとき、管の連結側端部同士間に発生する隙間を最小限になるようにすることが好ましい。次に、一方の連結側端部の凹部から他方の連結側端部の凹部にかけて少なくとも一周を越える長さのシール材を配置することにより、切欠部同士間の隙間の全てを上から完全に覆った状態にすることができる。この後、連結方向で隣合う管の連結側端部同士に渡る連結部材により外方側から締め付けてシール材を切欠部側に押し付けることによって、一周を越えて管軸芯方向で重複するシール材の互いに向き合った側の山埋部同士が管径方向で重複して閉ループを形成して、シール処理を完了すると共に連結側端部同士の連結を完了することができる。また、管体がそれぞれ凹部の底面の管軸芯方向中央に膨出する突出部を有するとともに、シール材の谷埋部の下面の管軸芯方向ほぼ中央箇所に前記管体凹部の突出部が入り込む凹部を形成したので、凹部の形状にシール材の接触面が合致してシールを確実に行うことができる。
【０００７】
また、前記シール材が発泡体よりなり、かつ、該シール材の前記谷埋部の下面及び前記山埋部の下面に、軟質合成樹脂製のフィルムを被覆してなることが好ましい。
【０００８】
また、前記シール材の前記谷埋部の２つの斜面のそれぞれ任意の箇所に、表面から円弧状に突出し、かつ、シール材の長手方向全域に渡る長さを有する２個の突出部を形成してなることが好ましい。
【０００９】
【発明の実施の形態】
図１に、２つの排水管用の大型の管１，１を後述の連結部材６により連結した状態を示している。各管１は、ポリエチレン等の合成樹脂により外面に凹部１Ａと内部中空状の凸部１Ｂとを交互に備え、かつ、それらが螺旋状に形成されている。前記内部中空状の凸部１Ｂは、図４（ａ），（ｂ）に示すように、凹部１Ａの内面が管１の長手方向で連続するように凸部１Ｂの内側下端部を塞いだ構成にしたものであり、このようにすることにより管１の内部がフラットな形状になるように構成するとともに、凸部１Ｂが変形しないように保形強度を向上させることができるようにしているが、必ずしも内面がフラットでなくてもよい。又、前記凸部１Ｂ内に断面形状が山形の金属製の補強板２を埋め込んで、凸部１Ｂの保形強度を更に向上させることができるようにしているが、無くてもよい。
【００１０】
以下、これら管１の複数をシール材９と上下方向で２分割された継手７，８からなる前記連結部材６を用いて連結する連結方法について説明するが、３分割又は４分割あるいは５分割された継手から連結部材を構成することもできる。尚、前記管１は、例えば内径の大きさが約１．８ｍで全長が約５ｍのものを用いる他、どのような寸法を用いてもよい。
前記管１の端部それぞれを、図４（ａ）及び図５（ｂ）に示すように、管１の凸部１Ｂから管の長手方向内方側に向かって管軸芯方向に直線状に切断した後、凹部１Ａを約半周切断して、切欠部３を形成している。この切欠部３を、管を製造する時に一体形成できるようにすれば、切断工程を不要にすることができる。前記切断することにより、凸部１Ｂの端部に開口部１Ｋが形成されることから、この開口部１Ｋに発泡体４を挿入して、開口部１Ｋから凸部１Ｂ内へ雨水等が浸入することがないようにしているが、発泡体４は必ずしも必要ではない。
まず、連結部材６の一方を構成する下側の継手７を所定位置（連結位置）に載置すると共にこの継手７の内面に後述するシール材９を配置する。この状態において、前記のように切欠部３が形成された管１の一端部を前記継手７に上方から載置する（図５（ａ）参照）。このとき、管１の凹部１Ａにシール材９の谷埋部９Ａが位置する状態で位置決めしておく。次に、図５（ｂ）に示すように、もう一方の管１をそれの端部の切欠部３と前記配置した管１の切欠部３の切断面が一致するようにセットすることによって、凹部１Ａと凸部１Ｂとが連続形成されるようにしている（図５（ｃ）参照）。このとき、管の連結側端部同士間に発生する隙間を最小限になるようにすることが好ましい。この後、シール材９を凹部１Ａ内に入り込ませながら管１の表面に少なくとも一周を越える長さ分巻き付けていき、一周を越えて管軸芯方向で隣り合うシール材９，９の互いに向き合った側の山埋部９Ｂ，９Ｂ同士が管径方向で重複して閉ループを形成し（図２及び図４（ａ），（ｂ）参照）、その状態でシール材９の両端をテープ１０を用いて管１に固定する（図５（ｄ）参照）。続いて、図６（ａ）に示すように、継手７，８のフランジ部７Ｂ，８Ｂ付近に相当するシール材９の部位に鋼板でなる板部材１１（左右両側それぞれに配置するものであるが、図では一方のみを示している）を当て付けてから図示していないテープにてそれの上下両端をシール材９又は管１に固定した後、上側の継手８を上から被せてから、図６（ｂ）に示すように、下側の継手７のほぼ中央に位置する貫通孔とこれに一致する上側の継手８の貫通孔とに渡って幅寄せ用のボルト１２Ｌを挿通させると共にナット１３を螺合させて、上下の継手７，８をある程度引き寄せる。次に、図６（ｃ）に示すように、幅寄せ用のボルト１２を挿通させていない継手７，８の２組の貫通孔に締め付け用のボルト１２を挿通させると共にナット１３を螺合させて締め付けた後、前記幅寄せ用のボルト１２Ｌを取り外し、取り外した貫通孔に前記と同一仕様の締め付け用のボルト１２を挿通させると共にナット１３を螺合させて締め付けることによって、シール材９を管１側へ押し付けて切欠部３，３間の隙間をシールすることができると共に２つの管１，１の接続作業を完了することができるようにしている（図６（ｄ）参照）。
【００１１】
前記シール材９は、軟質で発泡性のウレタンフォームからなっているが、ゴムや他の発泡しない軟質性の合成樹脂などシールできるものであればどのような材料で構成してもよい。又、その断面形状は、図２、図３（ａ），（ｂ）及び図４（ａ），（ｂ）に示すように、管１の凹部１Ａに入り込んで埋めることができるように下面がほぼ逆台形状に形成された谷埋部９Ａと、この谷埋部９Ａの左右幅方向両側にそれぞれ先端側（遊端側）ほど薄肉状になるように上面が先端側ほど下方に位置すると共に前記凹部１Ａの管軸芯方向前後に位置する凸部１Ｂ，１Ｂの上面のほぼ全域に接当する幅寸法を有する山埋部９Ｂとからなり、長さが凹部１Ａを一周するよりも少し長い寸法に設定して、凹部１Ａに巻き付けた状態では、図２及び図４（ａ），（ｂ）に示すように管軸芯方向で隣り合う谷埋部９Ａ，９Ａの山埋部９Ｂ，９Ｂ同士が上下方向において一部分で重複することで閉ループを形成することができるようにしている。ここでは、シール材９の長さを、凹部１Ａを一周するよりも少し長い寸法に設定することによって、コスト面及び接続作業面において有利になるが、二周又は三周以上の長さに設定することもできる。
【００１２】
前記シール材９が連続する発泡体であることから、図１０に示すように、前記シール材９の内面全域（管１の表面に接触する面）、つまり谷埋部９Ａの下面９ａ及び山埋部９Ｂ，９Ｂの下面９ｂ，９ｂを被覆するための塩化ビニルや軟質性のウレタンなどの軟質性の合成樹脂でなるフィルム１４を一体化して実施してもよい。このようにフィルム１４を備えさせることによって、前記切欠部３，３の間の隙間から漏れ出す水が山埋部９Ｂの下面９ｂから外部に漏れ出すことを確実に阻止する遮水効果を高めることができるだけでなく、管１の外面を滑り易くなりシール材９の凹部１Ａへの装着がし易いようにしている。前記フィルム１４は、シール材９を成形するための金型内に予め入れておき、その中に発泡剤を入れてから熱を加えて発泡させてシール材９を成形することによって、フィルム１４をシール材９に一体化させることによって、製造面において有利になるが、成形されたシール材９にフィルム１４を接着剤を介して貼り付けてもよい。
【００１３】
前記シール材９の内面、つまり管１の外面に接触する面を、図８（ａ），（ｂ）に示すように構成して実施してもよい。つまり、図９にも示すように、管１の凹部１Ａの底面の管軸芯方向ほぼ中央に膨出する突出部（保形強度を上げるために形成している）１Ｔが入り込む凹部９Ｃを前記谷埋部９Ａの下面の管軸芯方向ほぼ中央箇所に形成することによって、凹部１Ａの形状にシール材９の接触面を合致させることでシールを確実に行えるようにしているが、図３（ａ），（ｂ）で示したように、接触面を偏平面にして実施してもよい。又、シール材９の谷埋部９Ａの２つの斜面のそれぞれの任意の箇所に、表面から円弧状（三角形又は矩形状あるいは台形状などどのような形状であってもよい）に突出し、かつ、シール材９の長手方向全域に渡る長さを有する２個の突出部９Ｔ，９Ｔを形成してもよい。このように構成することによって、斜面を偏平面に形成して１つの面にてシールを行う場合に比べて、複数箇所でシールを行える構成の場合の方がシール不良が発生しにくい利点がある。
【００１４】
前記連結部材６は、図１、図２、図４（ａ），（ｂ）及び図７（ａ），（ｂ）に示すように、前述のように巻き付けられたシール材９の下側部位を覆うために管軸芯方向で隣り合う２つの凸部１Ｂ，１Ｂ間に渡る幅を有する金属製（ほぼ同等の強度を有するものであれば他の材料であってもよい）で半割板状の下側の継手７と、巻き付けられたシール材９の上側部位、つまり管軸芯方向で隣り合う２つの凹部１Ａ，１Ａ内に入り込んで重複するシール材９，９を覆うために管軸芯方向で隣り合う３つの凸部１Ｂ，１Ｂ間に渡る幅を有する（下側の継手７のほぼ１．５倍の幅を有する）金属製（ほぼ同等の強度を有するものであれば他の材料であってもよい）で半割板状の上側の継手８とから構成している。前記下側の継手７と上側の継手８とを必要最小限の幅を有するものから構成することによって、材料コスト面及び下側の継手７の軽量化による取扱面において有利になるが、上側の継手８を下側の継手７に使用して、上下同一幅を有する継手８，８であってもよい。
【００１５】
前記下側継手７及び上側継手８は、幅が異なるだけで形状は同一であるため、上側継手について詳述すれば、図４（ａ），（ｂ）及び図７（ａ），（ｂ）に示すように、前記のようにシール材９，９を覆うために管軸芯方向で隣り合う３つの凸部１Ｂ，１Ｂ間に渡る幅を有する円弧状で板状の継手本体８Ａと、この継手本体８Ａの長手方向両端のそれぞれにほぼ水平方向に延びるフランジ部８Ｂと、前記継手本体８Ａの長手方向と直交する管軸芯方向両端のそれぞれにほぼ９０度折り曲げられて管１への継手８の装着により凹部１Ａに入り込んで継手８が管軸芯方向に移動することを阻止するための多数の板片部８Ｃとからなっているが、多数の板片部８Ｃは無くてもよい。そして、前記フランジ部８Ｂに、前記締め付け用のボルト１２が挿通可能な貫通孔８Ｋの複数個（図では５個であるが、確実に締め付けることができれば何個であってもよい）を形成している。
【００１６】
【発明の効果】
請求項１の発明によれば、谷埋部と山埋部とからなるシール材と連結部材の２種類の部品によりシール処理した状態で２つの管を接続することができる構成であるから、部品点数の削減化による接続作業の容易迅速化を図ることができる管体の接続方法を提供することができる。また、管体がそれぞれ凹部の底面の管軸芯方向中央に膨出する突出部を有するとともに、シール材の谷埋部の下面の管軸芯方向ほぼ中央箇所に前記管体凹部の突出部が入り込む凹部を形成したので、凹部の形状にシール材の接触面が合致してシールを確実に行うことができる。
【００１７】
請求項２の発明によれば、切欠部の間の隙間から漏れ出す水が山埋部の下面から外部に漏れ出すことを確実に阻止する遮水効果を高めることができるだけでなく、管の外面を滑り易くなりシール材の凹部への装着がし易いようにしている。フィルムは、シール材を成形するための金型内に予め入れておき、その中に発泡剤を入れてから熱を加えて発泡させてシール材を成形することによって、フィルムをシール材に一体化させることによって、製造面において有利になる。
【００１８】
請求項３の発明によれば、斜面を偏平面に形成して１つの面にてシールを行う場合に比べて、複数箇所でシールを行える構成の場合の方がシール不良が発生しにくい利点がある。
【図面の簡単な説明】
【図１】管同士を連結部材にて連結した連結部の側面図である。
【図２】管同士を連結部材にて連結した連結部の一部切欠き平面図である。
【図３】シール材を示し、（ａ）はそれの斜視図、（ｂ）はそれの断面図である。
【図４】（ａ）は管同士を連結部材にて連結した連結部の縦断側面図、（ｂ）は（ａ）の上部構造のみを示す拡大図である。
【図５】２本の管を接続する前半の手順を示す説明図であり、（ａ）は下側継手にシール材及び一方の管の端部を配置した状態を示す側面図、（ｂ）は他方の管をセットした一方の管に位置合わせする直前の状態を示す側面図、（ｃ）は２本の管を下側継手に対して突き合わせた状態を示す側面図、（ｄ）はシール材をテープにて固定した状態を示す平面図である。
【図６】２本の管を接続する後半の手順を示す説明図であり、（ａ）は上側継手を上から被せる直前の状態を示す側面図、（ｂ）は幅寄せボルトにて上下の継手を引き寄せる直前の状態を示す側面図、（ｃ）は締め付け用ボルトにて締め付けると共に幅寄せボルトを取り外した状態を示す側面図、（ｄ）は接続が完了した状態を示す側面図である。
【図７】上側の継手を示し、（ａ）はそれの正面図、（ｂ）はそれの斜視図である。
【図８】別のシール材を示し、（ａ）はそれの斜視図、（ｂ）はそれの断面図である。
【図９】図８のシール材を管の凹部に入り込ませる直前の状態を示す断面図である。
【図１０】下面にフィルムを備えさせたシール材の断面図である。
【符号の説明】
１Ａ凹部１Ｋ開口部
１管１Ｂ凸部
２補強板３切欠部
４発泡体６連結部材
７下側継手８上側継手
７Ｂ，８Ｂフランジ部
７Ｋ，８Ｋ貫通孔７Ａ，８Ａ継手本体
７Ｃ，８Ｃ板片部９シール材
９Ｃ凹部９ａ下面
９ｂ下面９Ｂ山埋部
９Ａ谷埋部９Ｔ突出部
１０テープ１１板部材
１２ボルト１３ナット
１４フィルム[0001]
BACKGROUND OF THE INVENTION
The present invention relates to, for example, a connection method of a tubular body used as a tubular body for drainage of rainwater or used as a tubular body for drainage for sewerage, and more specifically, the outer surface is alternately provided with concave portions and convex portions, and The present invention relates to a pipe connecting method for connecting a plurality of spirally formed pipes.
[0002]
[Prior art]
For example, when laying as drainage pipes for rainwater under the road, if the laying distance is longer than the length of one pipe, connect the pipes so that the pipe length matches the laying distance. Yes.
And when connecting a plurality of the above tubes, first, in one of the connection side end portions of the adjacent tubes in the connection direction, a notch portion in which the other connection side end portion can enter in the connection direction is formed, In a state in which these connecting side end portions enter each other, the concave and convex end surfaces of one connecting side end coincide with the concave and convex end surfaces of the other connecting side end, and the concave and convex portions are continuously formed. After being configured, a foaming agent is injected and cured into two portions of the concave portion of the one connecting side end portion and the concave portion of the other connecting side end portion. In a state where the elastic member having the same width as the convex portion or narrower than the convex portion is fixed over at least one round while traversing the foamed material, and then the entire connecting portion is covered with a sheet-like sealing member, Cross between the connecting side ends of adjacent pipes in the connecting direction Tighten the outer side by the connecting member so that coupling in a state where the sealing process has been completed between the connecting-side end portion (e.g., see Patent Document 1.).
[0003]
[Patent Document 1]
Japanese Patent No. 3179755 gazette [0004]
[Problems to be solved by the invention]
In addition to foaming agents and elastic members, a sheet-like seal member is required for use in the connection work, and not only has a large number of parts, but also a recess at one connection side end and a recess at the other connection side end. And fixing with an adhesive or the like over at least one turn while traversing the foam formed by curing the elastic member on the convex portion in the connecting portion. In addition to the two troublesome operations, a work for covering the entire connecting portion with a sheet-like seal member has to be performed, which requires a lot of work time.
[0005]
In view of the above-described situation, the present invention intends to provide a tube connecting method that can easily and quickly perform connection work by reducing the number of parts.
[0006]
[Means for Solving the Problems]
The present invention is, for the aforementioned problem solving, and a concave and convex portions are alternately on the outer surface, and, in connection of the tube to which they are connected a plurality of tubes formed in a spiral shape, wherein Each tubular body has a protruding portion that bulges in the center in the tube axis direction on the bottom surface of the recess , and one of the connection side ends of the adjacent tubes in the connection direction and the other connection side end in the connection direction. A cutout portion that can be inserted is formed, and the cutout portion has a shape in which the concave portion is cut about half a circumference along the protruding portion , and one of the connection side end portions in a state where these connection side end portions enter each other. The end surface of the concave portion and the convex portion of the other connecting side end portion coincides with the end surface of the concave portion and the convex portion, and the concave portion and the convex portion are continuously formed. More than at least one turn that continuously fills the recess at the other connecting side end. And a pair of mountain buried portions provided on both sides in the width direction of the valley buried portion to prevent discharge of water from the convex portions located on both sides in the tube axis direction of the recessed portions. Do Ri, with the tubular body recess sealing material protruding portion is in a recess which enters the the lower surface of the pipe axis direction substantially central portion of the trough embedding portion, the sealing material of the connecting-side end portion of the one Covering the gap generated between the notches by continuously entering from the recess to the recess at the other connecting side end, and on the opposite side of the seal material that overlaps in the tube axis direction beyond the circumference. After the buried portions overlap in the tube diameter direction to form a closed loop, the connecting member that covers the tube from the outside together with the seal material is tightened to press the seal material to the outer surface side of the tube By doing so, the connecting side ends are sealed. It is characterized in that linked state.
Therefore, when connecting pipes, one of the connecting side ends of adjacent pipes in the connecting direction is formed by cutting or molding a notch part in which the other connecting side end can enter in the connecting direction, In a state where these connecting side end portions enter each other, the end surface of the concave portion and the convex portion of one connecting side end portion is in a state of being matched with the end surface of the concave portion and the convex portion of the other connecting side end portion. Is formed continuously. At this time, it is preferable to minimize the gap generated between the connection side ends of the pipe. Next, by disposing a seal material having a length exceeding at least one turn from the concave portion of one connecting side end portion to the concave portion of the other connecting side end portion, the gap between the notch portions is completely covered from above. It can be in the state. After this, the sealing material that overlaps in the tube axis direction over one circumference by tightening from the outside side by the connecting member across the connecting side ends of the adjacent pipes in the connecting direction and pressing the sealing material against the notch portion side The buried portions on the opposite sides of each other overlap in the tube diameter direction to form a closed loop, thereby completing the sealing process and completing the connection between the connection side ends. Each of the tubular bodies has a protruding portion that bulges in the center in the tube axis direction on the bottom surface of the recessed portion, and the protruding portion of the tube body recessed portion is located at a substantially central position in the tube axis direction on the lower surface of the valley buried portion of the sealing material. Since the recessed part to enter is formed, the contact surface of the sealing material matches the shape of the recessed part, and the sealing can be reliably performed.
[0007]
Preferably, the sealing material is made of a foam, and a soft synthetic resin film is coated on the lower surface of the valley buried portion and the lower surface of the mountain buried portion of the sealing material.
[0008]
Further, two protruding portions that protrude in an arc shape from the surface and have a length over the entire length in the longitudinal direction of the sealing material are formed on each of the two slopes of the valley buried portion of the sealing material. It is preferable that
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a state in which two large pipes 1 and 1 for drainage pipes are connected by a connecting member 6 described later. Each tube 1 is alternately provided with concave portions 1A and hollow inner convex portions 1B on the outer surface by a synthetic resin such as polyethylene, and they are formed in a spiral shape. As shown in FIGS. 4 (a) and 4 (b), the inner hollow convex portion 1B is configured by closing the inner lower end portion of the convex portion 1B so that the inner surface of the concave portion 1A is continuous in the longitudinal direction of the tube 1. In this way, the inside of the tube 1 is configured to have a flat shape, and the shape retention strength can be improved so that the convex portion 1B is not deformed. The inner surface is not necessarily flat. Further, a metal reinforcing plate 2 having a mountain-shaped cross section is embedded in the convex portion 1B so that the shape retention strength of the convex portion 1B can be further improved, but it may be omitted.
[0010]
Hereinafter, a connection method for connecting a plurality of the pipes 1 with the seal member 9 using the connecting member 6 composed of the joints 7 and 8 divided in the vertical direction will be described. A connecting member can also be formed from the joint. The tube 1 may have any size other than, for example, a tube having an inner diameter of about 1.8 m and a total length of about 5 m.
As shown in FIGS. 4A and 5B, the end portions of the tube 1 are linearly formed in the tube axis direction from the convex portion 1B of the tube 1 toward the inner side in the longitudinal direction of the tube. After cutting, the recess 1 </ b> A is cut about half a circle to form a cutout 3. If the notch 3 can be integrally formed when manufacturing the pipe, a cutting step can be eliminated. Since the opening 1K is formed at the end of the convex portion 1B by cutting, the foam 4 is inserted into the opening 1K, and rainwater or the like enters the convex portion 1B from the opening 1K. However, the foam 4 is not always necessary.
First, the lower joint 7 constituting one of the connecting members 6 is placed at a predetermined position (connecting position), and a seal material 9 described later is disposed on the inner surface of the joint 7. In this state, one end of the tube 1 in which the notch 3 is formed as described above is placed on the joint 7 from above (see FIG. 5A). At this time, positioning is performed in a state where the valley filling portion 9A of the sealing material 9 is located in the concave portion 1A of the tube 1. Next, as shown in FIG. 5 (b), by setting the other tube 1 so that the cut surface of the cutout portion 3 of the other tube 1 and the cutout portion 3 of the arranged tube 1 coincide with each other, The concave portion 1A and the convex portion 1B are continuously formed (see FIG. 5C). At this time, it is preferable to minimize the gap generated between the connection side ends of the pipe. Thereafter, the seal material 9 is wound around the surface of the tube 1 for at least a length while entering the recess 1A, and the seal materials 9 and 9 adjacent to each other in the tube axis direction face each other over the circumference. The side buried portions 9B, 9B overlap each other in the tube diameter direction to form a closed loop (see FIGS. 2 and 4A, 4B), and the tape 10 is used at both ends of the sealing material 9 in this state. And fixed to the tube 1 (see FIG. 5D). Subsequently, as shown in FIG. 6 (a), the plate members 11 (which are arranged on both the left and right sides) are made of a steel plate in a portion of the sealing material 9 corresponding to the vicinity of the flange portions 7B and 8B of the joints 7 and 8, respectively. (Only one of them is shown in the figure) and the upper and lower ends thereof are fixed to the sealing material 9 or the tube 1 with a tape (not shown), and then the upper joint 8 is covered from above. As shown in FIG. 6 (b), the width adjusting bolt 12L is inserted through the through hole located substantially in the center of the lower joint 7 and the through hole of the upper joint 8 corresponding thereto, and the nut 13 And the upper and lower joints 7 and 8 are pulled to a certain extent. Next, as shown in FIG. 6C, the tightening bolts 12 are inserted into the two sets of through holes of the joints 7 and 8 through which the width adjusting bolts 12 are not inserted, and the nuts 13 are screwed together. After tightening, the bolt 12L for width adjustment is removed, and the bolt 12 for tightening having the same specifications as the above is inserted into the removed through-hole and the nut 13 is screwed and tightened to tighten the sealing material 9 to the tube. It is possible to seal the gap between the notches 3 and 3 by pressing to the 1 side and to complete the connecting operation of the two pipes 1 and 1 (see FIG. 6D).
[0011]
The sealing material 9 is made of a soft and foamable urethane foam, but may be made of any material that can be sealed, such as rubber or other soft synthetic resin that does not foam. Further, as shown in FIGS. 2, 3 (a), 3 (b) and 4 (a), (b), the cross-sectional shape of the lower surface is such that it can enter and fill the recess 1 A of the tube 1. The valley-burying portion 9A formed in a substantially inverted trapezoidal shape, and the top surface of the valley-burying portion 9A are positioned below the tip side so that the tip side (free end side) becomes thinner on both sides in the left-right width direction. The concave portion 1A is formed of a mountain-burying portion 9B having a width dimension that is in contact with substantially the entire upper surface of the convex portions 1B and 1B located in the front and rear directions of the tube axis direction, and is slightly longer than one round of the concave portion 1A. In a state where the dimensions are set and wound around the recess 1A, as shown in FIG. 2 and FIGS. 4A and 4B, the mountain buried portions 9B and 9B of the valley buried portions 9A and 9A adjacent in the tube axis direction are provided. A closed loop can be formed by overlapping each other in the vertical direction. Here, it is advantageous in terms of cost and connection work by setting the length of the sealing material 9 to a dimension slightly longer than one round of the recess 1A, but it is set to a length of two or three or more rounds. You can also
[0012]
Since the sealing material 9 is a continuous foam, as shown in FIG. 10, the entire inner surface of the sealing material 9 (the surface in contact with the surface of the tube 1), that is, the lower surface 9a of the valley filling portion 9A and the mountain filling. The film 14 made of a soft synthetic resin such as vinyl chloride or soft urethane for covering the lower surfaces 9b, 9b of the portions 9B, 9B may be integrated. By providing the film 14 in this way, it is possible to enhance the water shielding effect that reliably prevents water leaking from the gap between the notches 3 and 3 from leaking out from the lower surface 9b of the mountain buried portion 9B. In addition, the outer surface of the tube 1 can be easily slid, and the sealing material 9 can be easily attached to the recess 1A. The film 14 is placed in advance in a mold for molding the sealing material 9, and after the foaming agent is put therein, the film 14 is molded by forming the sealing material 9 by applying heat and foaming. Although integrating with the sealing material 9 is advantageous in terms of manufacturing, the film 14 may be attached to the molded sealing material 9 via an adhesive.
[0013]
The inner surface of the sealing material 9, that is, the surface that contacts the outer surface of the tube 1 may be configured and implemented as shown in FIGS. That is, as shown in FIG. 9 , the concave portion 9C into which the protruding portion (formed to increase the shape retaining strength) 1T swells in the center of the bottom surface of the concave portion 1A of the tube 1 in the tube axis direction is formed. By forming the bottom surface of the valley filling portion 9A at the substantially central portion in the tube axis direction, the contact surface of the sealing material 9 is made to conform to the shape of the recess 1A, so that the sealing can be reliably performed. As shown in a) and (b), the contact surface may be a flat surface. Further, it protrudes in an arc shape (any shape such as a triangle, a rectangle or a trapezoid) from the surface at an arbitrary location on each of the two slopes of the valley embedded portion 9A of the sealing material 9, and You may form the two protrusion parts 9T and 9T which have the length over the whole longitudinal direction of the sealing material 9. FIG. By configuring in this way, there is an advantage that a seal failure is less likely to occur in the configuration in which sealing can be performed at a plurality of locations than in the case where the inclined surface is formed on a flat surface and sealing is performed on one surface. .
[0014]
As shown in FIGS. 1, 2, 4 (a), (b) and FIGS. 7 (a), (b), the connecting member 6 is a lower part of the sealing material 9 wound as described above. A half plate made of a metal having a width extending between two convex portions 1B, 1B adjacent to each other in the direction of the tube axis (other materials may be used as long as they have substantially the same strength) Pipe joint to cover the lower joint 7 and the upper part of the wound sealing material 9, that is, into the two recesses 1 </ b> A and 1 </ b> A adjacent in the tube axis direction and overlapping each other. Metal having a width extending between three convex portions 1B, 1B adjacent in the core direction (having a width approximately 1.5 times that of the lower joint 7), and any other material having substantially the same strength It may be made of a material) and is formed of a half-plate-like upper joint 8. By constructing the lower joint 7 and the upper joint 8 from those having the necessary minimum width, it is advantageous in terms of material cost and handling in terms of weight reduction of the lower joint 7, Joints 8 and 8 having the same vertical width may be used by using the joint 8 for the lower joint 7.
[0015]
Since the lower joint 7 and the upper joint 8 have the same shape except for the width, the upper joint will be described in detail with reference to FIGS. 4 (a) and 4 (b) and FIGS. 7 (a) and 7 (b). As shown above, an arcuate plate-like joint body 8A having a width extending between the three convex portions 1B, 1B adjacent in the tube axis direction in order to cover the sealing materials 9, 9, as described above, A flange portion 8B extending in a substantially horizontal direction at each of both ends in the longitudinal direction of the joint body 8A, and a joint 8 to the pipe 1 by being bent at approximately 90 degrees at both ends in the tube axis direction orthogonal to the longitudinal direction of the joint body 8A. Is provided with a large number of plate pieces 8C for preventing the joint 8 from moving in the tube axis direction by entering the recess 1A. However, the large number of plate pieces 8C may be omitted. Then, a plurality of through-holes 8K (five in the figure, but can be any number if securely tightened) through which the bolts for tightening 12 can be inserted are formed in the flange portion 8B. ing.
[0016]
【The invention's effect】
According to invention of Claim 1, since it is the structure which can connect two pipes in the state sealed by two types of components, the sealing material which consists of a valley buried part and a mountain buried part, and a connection member, It is possible to provide a pipe connecting method capable of facilitating and speeding up the connection work by reducing the number of points. Each of the tubular bodies has a protruding portion that bulges in the center in the tube axis direction on the bottom surface of the recessed portion, and the protruding portion of the tube body recessed portion is located at a substantially central position in the tube axis direction on the lower surface of the valley buried portion of the sealing material Since the recessed part to enter is formed, the contact surface of the sealing material matches the shape of the recessed part, and the sealing can be reliably performed.
[0017]
According to the invention of claim 2 , not only can the water leakage effect that reliably prevents water leaking from the gap between the notches to leak outside from the lower surface of the mountain buried portion, but also the outer surface of the pipe This makes it easier to slide the seal material into the recess. The film is placed in a mold for molding the sealing material in advance, and after the foaming agent is put in it, it is foamed by applying heat to form the sealing material, thereby integrating the film into the sealing material This is advantageous in terms of manufacturing.
[0018]
According to the third aspect of the present invention, there is an advantage that a sealing failure is less likely to occur in the configuration in which the sealing can be performed at a plurality of locations than in the case where the inclined surface is formed on a flat surface and the sealing is performed on one surface. is there.
[Brief description of the drawings]
FIG. 1 is a side view of a connecting portion in which tubes are connected by a connecting member.
FIG. 2 is a partially cutaway plan view of a connecting portion in which tubes are connected by a connecting member.
3A and 3B show a sealing material, in which FIG. 3A is a perspective view thereof, and FIG. 3B is a cross-sectional view thereof.
FIG. 4A is a longitudinal side view of a connecting portion in which tubes are connected by a connecting member, and FIG. 4B is an enlarged view showing only the upper structure of FIG.
FIG. 5 is an explanatory view showing a procedure in the first half for connecting two pipes, (a) is a side view showing a state in which a sealing material and an end of one pipe are arranged on the lower joint, and (b). Is a side view showing a state immediately before the other pipe is set on one pipe, (c) is a side view showing a state in which two pipes are butted against the lower joint, and (d) is a seal. It is a top view which shows the state which fixed the material with the tape.
6A and 6B are explanatory views showing the latter half of the procedure for connecting two pipes, in which FIG. 6A is a side view showing a state immediately before the upper joint is covered from above, and FIG. The side view which shows the state just before pulling a joint together, (c) is a side view which shows the state which tightened with the bolt for fastening, and removed the width adjusting bolt, (d) is a side view which shows the state which the connection was completed.
7A is a front view of the upper joint, and FIG. 7B is a perspective view thereof.
8A and 8B show another sealing material, in which FIG. 8A is a perspective view thereof, and FIG. 8B is a cross-sectional view thereof.
FIG. 9 is a cross-sectional view showing a state immediately before the sealing material of FIG. 8 enters the recess of the pipe.
FIG. 10 is a cross-sectional view of a sealing material provided with a film on the lower surface.
[Explanation of symbols]
1A Concave 1K Opening 1 Pipe 1B Convex 2 Reinforcement plate 3 Notch 4 Foam 6 Connecting member 7 Lower joint 8 Upper joint 7B, 8B Flange 7K, 8K Through-hole 7A, 8A Joint body 7C, 8C Plate piece 9 Seal material 9C Concave part 9a Lower surface 9b Lower surface 9B Mountain buried part 9A Valley buried part 9T Protruding part 10 Tape 11 Plate member 12 Bolt 13 Nut 14 Film

Claims

In a tube connecting method for alternately connecting a plurality of tubes in which concave portions and convex portions are provided alternately on the outer surface and in which they are formed in a spiral shape, each of the tube bodies is a tube axis on the bottom surface of the concave portion. has a projecting portion that bulges direction center, on one of the connecting-side end portions of adjacent tubes in the connecting direction, the connecting-side end portion of the other to form a notch that it can enter in the connection direction, cutout The part has a shape in which the concave part is cut about half a circumference along the protruding part, and in a state in which these connection side end parts enter each other, the concave part of one connection side end part and the end surface of the convex part are on the other connection side. The concave portion and the convex portion are configured so that the concave portion and the convex portion are continuously formed so as to coincide with the end surfaces of the concave portion and the convex portion, and the concave portion of the one connecting side end portion and the concave portion of the other connecting side end portion are continuous. The valley buried portion having a length exceeding at least one turn and filling the recessed portion. Ri Do a pair of mountain embedding part that gave provided on both sides in the width direction of the trough embedding portion in order to prevent the discharge of water from the convex portion positioned in the axial direction on both sides, the tube axis of the lower surface of the trough embedding portion Using a sealing material formed with a recess into which the protruding portion of the tubular body recess enters at a substantially central position in the core direction , the sealing material is continuously extended from the recess at the one connection side end to the recess at the other connection side end. By covering the gaps between the cutout portions, the buried portions on the opposite sides of the seal material that overlap each other in the tube axis direction beyond the circumference overlap each other in the tube diameter direction. After the closed loop is formed, the connecting side ends are sealed by pressing the sealing material toward the outer surface side of the pipe by tightening the connecting member that covers the pipe from the outside together with the sealing material. Characterized by being connected together The method of connection.

The tube connection according to claim 1, wherein the sealing material is made of foam, and a soft synthetic resin film is coated on a lower surface of the valley buried portion and a lower surface of the mountain buried portion of the sealing material. Method.

Two protruding portions that protrude in an arc shape from the surface and have a length over the entire length in the longitudinal direction of the sealing material are formed at arbitrary locations on the two slopes of the valley buried portion of the sealing material. The method for connecting pipes according to claim 1 or 2.