JP3749603B2

JP3749603B2 - Strip for existing pipe lining

Info

Publication number: JP3749603B2
Application number: JP27303997A
Authority: JP
Inventors: 康北山
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 1997-10-06
Filing date: 1997-10-06
Publication date: 2006-03-01
Anticipated expiration: 2017-10-06
Also published as: JPH11105135A

Description

【０００１】
【発明の属する技術分野】
本発明は、老朽化した既設管を更正する際に使用される既設管ライニング用帯状体に関する。
【０００２】
【従来の技術】
上水道や下水道として使用される既設管には、古くから金属管やヒューム管が使用されている。このような既設管は、長期の使用によって老朽化し、割れや腐食により漏水するおそれがある。このため、最近では、老朽化した埋設管等の既設管内に合成樹脂管を挿入してライニングすることが行われている。
【０００３】
上記合成樹脂管の一つに、合成樹脂製の帯状体を螺旋状に巻回することにより形成される螺旋管によって既設管をライニングする方法があり、この工法に使用される螺旋管の一例が実開平１−７５６８２号公報に記載されている。
【０００４】
この螺旋管は、図９に示すように、一端に嵌合部ａを有し、他端に係止部ｂを有する帯状体ｃを螺旋状に巻回しつつ既設管内に挿入し、螺旋状に巻回された帯状体の嵌合部ａに、隣接する帯状体ｃ’の係止部ｂ’とを摺動可能に嵌入係止させ、係合状態とすることにより螺旋管を製造しつつ、既設管内面をライニングするようになっている。
【０００５】
【発明が解決しようとする課題】
しかし、上記既設管では、例えば湾曲した既設管に沿って螺旋管を挿通させる場合には、既設管内周面が螺旋管と接触することにより、螺旋管に大きな抵抗力が作用する。このために、螺旋管に順次帯状体が送給されることにより、螺旋管を構成する帯状体に螺旋方向への推進力が作用して、螺旋管には拡径するように力が加わる。これにより、螺旋管を構成している帯状体の幅方向に大きな引っ張り力が作用し、その引っ張り力により帯状体の側端部同士の係合状態が解除されて、螺旋管が破損するおそれがある。
【０００６】
また、既設管の湾曲が大きい場合、既設管内面で、一方の帯状体ｃの嵌合部ａに、隣接する帯状体ｃ’の係止部ｂ’を嵌入する際、十分に嵌入せず嵌合不良となることもある。
【０００７】
本発明は上記の課題を解決し、螺旋管とされて既設管内を挿通される際に、螺旋管に加わる抵抗力によって螺旋管が破損されることがなく、且つ、隣接する帯状部材同士が嵌合不良を生じることのない、既設管ライニング用帯状体を提供することを目的とする。
【０００８】
【課題を解決するための手段】
請求項１記載の既設管ライニング用帯状体（以下、「本発明１」という）は、螺旋状に巻回されることにより螺旋管とされて、ライニングすべき既設管内に挿入される既設管ライニング用帯状体であって、該帯状体が少なくとも２本以上の帯状部材からなり、帯状部材同士は、一方の帯状部材の一側端に設けられた、二股状で且つ開口端内縁に抜止部が対設された嵌合部に、他方の帯状部材の一側端に設けられた係止部が摺動可能に嵌入係止され、帯状体の側端部を形成する部分には、隣接する帯状体が螺旋状に巻回される際に内外に重ね合わされて互いに嵌合し合う接手部が設けられているものである。
【０００９】
本発明１の帯状体において一つの帯状体内の帯状部材同士の接合は、一方の帯状部材の一側端に設けられた嵌合部に、他方の帯状部材の一側端に設けられた係止部が嵌入係止されてなる。
【００１０】
本発明１の帯状体において帯状体同士の接合は、帯状体の側端部を形成する部分に設けられた接手部により、隣接する帯状体が螺旋状に巻回される際に内外に重ね合わされて互いに嵌合し合うものである。
【００１１】
上記帯状部材は、基板と、両側端に設けられた嵌合部、係止部、又は接手部と、必要に応じ、帯状体が螺旋状に巻回された際に外表面側に突出するように設けられた補強リブとからなる。
【００１２】
上記帯状部材の係止部が嵌合部内で摺動可能なストロークは、帯状体が螺旋状に巻回される際に想定される内径と外径との差に起因する周長差を嵌合部の数で除した値に１．２〜２倍程度の安全係数を乗した値とするのが好ましい。
【００１３】
上記補強リブ大きさは特に限定されず、ライニングすべき既設管の内径、曲げ角度、帯状体の材料強度等によって適宜選定すればよく、例えば既設管の内径５００ｍｍ、曲げ角度１０度の場合には、高さ１２ｍｍ、肉厚２ｍｍ（基板と同様）、半径４ｍｍ程度が適当である。
【００１４】
請求項２記載の既設管ライニング用帯状体（以下、「本発明２」という）は、螺旋状に巻回されることにより螺旋管とされて、ライニングすべき既設管内に挿入される既設管ライニング用帯状体であって、該帯状体が少なくとも２本以上の主帯状部材と、嵌合部材とからなり、主帯状部材同士は、一方の主帯状部材の一側端に設けられた、二股状で且つ開口端内縁に抜止部が対設された嵌合部に、他方の主帯状部材の一側端に設けられた係止部が摺動可能に嵌入係止され、合い隣り合う帯状体同士は、螺旋状に巻回された際に側端部同士が当接され、側端部同士が当接された状態で双方の側端部が上記嵌合部材を介して、嵌着可能となされているものである。
【００１５】
本発明２の帯状体において一つの帯状体内の主帯状部材同士の接合は、一方の主帯状部材の一側端に設けられた嵌合部に、他方の主帯状部材の一側端に設けられた係止部が嵌入係止されてなる。
【００１６】
本発明２の帯状体において帯状体同士の接合は、帯状体が螺旋状に巻回された際に側端部同士が当接され、側端部同士が当接された状態で双方の側端部が上記嵌合部材を介して、嵌着可能となされているものである。
【００１７】
上記主帯状部材は、基板と、両側端に設けられた嵌合部、係止部、又は側端部と、必要に応じ、帯状体が螺旋状に巻回された際に外表面側に突出するように設けられた補強リブとからなる。
【００１８】
上記主帯状部材の係止部が嵌合部内で摺動可能なストローク、主帯状部材の補強リブの大きさは、本発明１で説明したのと同様である。
【００１９】
本発明１及び２の帯状体は、ポリ塩化ビニル、ポリエチレン、ポリプロピレン、ポリカーボネート、ポリエステル、あるいはこれらの樹脂をガラス繊維で補強した樹脂等の材料により、押出成形等により一体成形される。
【００２０】
（作用）
本発明１の帯状体は、螺旋状に巻回されることにより螺旋管とされて、ライニングすべき既設管内に挿入される既設管ライニング用帯状体であって、該帯状体が少なくとも２本以上の帯状部材からなり、帯状部材同士は、一方の帯状部材の一側端に設けられた、二股状で且つ開口端内縁に抜止部が対設された嵌合部に、他方の帯状部材の一側端に設けられた係止部が摺動可能に嵌入係止され、帯状体の側端部を形成する部分には、隣接する帯状体が螺旋状に巻回される際に内外に重ね合わされて互いに嵌合し合う接手部が設けられているものであるから、接手部同士を嵌合し、帯状体を螺旋状に巻回して螺旋管とする際に、第１の帯状部材の嵌合部内で第２の帯状部材の係止部が摺動することにより、螺旋管に加わる抵抗力によって螺旋管が破損されることがなく、且つ、隣接する帯状部材同士が嵌合不良を生じることがない。
【００２１】
本発明２の帯状体は、螺旋状に巻回されることにより螺旋管とされて、ライニングすべき既設管内に挿入される既設管ライニング用帯状体であって、該帯状体が少なくとも２本以上の主帯状部材と、嵌合部材とからなり、主帯状部材同士は、一方の主帯状部材の一側端に設けられた、二股状で且つ開口端内縁に抜止部が対設された嵌合部に、他方の主帯状部材の一側端に設けられた係止部が摺動可能に嵌入係止され、合い隣り合う帯状体同士は、螺旋状に巻回された際に側端部同士が当接され、側端部同士が当接された状態で双方の側端部が上記嵌合部材を介して、嵌着可能となされているものであるから、上記接合部と嵌合部材を嵌合し帯状体を螺旋状に巻回して螺旋管とする際に、第１の主帯状部材の嵌合部内で第２の主帯状部材の係止部が摺動することにより、螺旋管に加わる抵抗力によって螺旋管が破損されることがなく、且つ、隣接する帯状部材同士が嵌合不良を生じることがない。
【００２２】
【発明の実施の形態】
本発明の実施の形態を図面をもって詳細に説明する。
図１は、本発明１の帯状体の一例を示す縦断面図である。
【００２３】
下水管内周面にライニングされる本発明１の帯状体１は、硬質塩化ビニル樹脂の押出成形により製せられたもので、図１に示すように、２本の帯状部材２、３とからなる。
【００２４】
一方の帯条部材２は、基板２２と、一側端に設けられた嵌合部２４と、他側部に設けられた接手部２６とからなる。
【００２５】
上記嵌合部２４は二股状とされ、且つ開口端内縁に抜止部２４４が対設されている。
【００２６】
上記接手部２６は、帯状体１が螺旋状に巻回された際に外表面側に突出するように設けられたフランジ部２６２と、その内面に形成された断面半円状の凹条２７とからなり、基板２２の長手方向に沿って設けられている。
【００２７】
他方の帯状部材３は、基板３２と、一側端に設けられた係止部３４と、他側部に設けられた接手部３６と、帯状体１が螺旋状に巻回された際に外表面側に突出するように設けられた補強リブ３８とからなる。
【００２８】
上記係止部３４は、一方の帯状部材２の嵌合部２４内に摺動可能に嵌入係止されている。
【００２９】
上記接手部３６には、補強リブ３８よりも突設高さが小さくなされた突条３７が立設されている。該突条３７は、基板３２の長手方向に連続しており、基板３２の厚さより若干長い支柱部３７２と、支柱部３７２の先端に配設された半球状の挿入部３７４とからなる。
【００３０】
上記係止部３４と接手部３６の間には、本発明１の帯板状１が螺旋状に巻回された際に外表面側、即ち突条３７の突出方向へと突出するように、断面Ｔ字状をなす複数の補強リブ３８が、等しい間隔をあけて配置されている。各補強リブ３８は、基板３２の長手方向に沿って該基板３２と一体的に立設されており、基板３２に対して直交状態に形成された支柱部３８２と、該支柱部３８２の先端に支柱部３８２に対して直交状態で設けられたフランジ部３８４とを有している。
【００３１】
第１の帯状部材２の接手部２６と各補強リブ３８は、それぞれのフランジ部２６２、３８４が、ほぼ基板２２、３２に平行する同一平面内に位置するように形成されている。
【００３２】
図２は、図１に示した帯状体の嵌合状態を示す縦断面図である。
図２に示すように、一方の帯状部材２と他方の帯状部材３の接手部３６は、隣接する帯状体１が螺旋状に巻回される際に内外に重ね合わされて、第２の帯状部材３の接手部３６の突条３７が、一方の帯状部材２の接手部２６の凹条２７に嵌合し合うことでライニング管が形成されるようになされている。
【００３３】
なお、上記一方の帯状部材２の、接手部２６から嵌合部２４までは、図２に示すように本発明１の帯板状１が螺旋状に巻回された際に、他方の帯状部材３の側端部３６２から突条３７までが嵌入し得るように、基板３２の厚み分だけ凹条２７側に段落ちした段落ち部２７２が形成されている。段落ち部２７２に嵌入し得る第２の帯状部材３の側端部３６２近傍の上面には、段落ち部２７２とを接着して止水するためのホットメルト接着剤（図示せず）が塗布されている。
【００３４】
図３は、図２に本発明１の帯状体１を用いて螺旋管を形成する方法を説明する説明図である。
【００３５】
図３に示すように、地上に設置された巻出機Ｔから巻出される本発明１の帯状体１は、マンホールＭを通して地下に埋設されている既設管渠Ｐ内へ送りこまれ、製管機１２によって既設管渠Ｐ内で巻回され、両側縁部の接合部が接合されて螺旋管Ｌが形成され、同時に製管機１２が矢印のように右側へ進んで、形成された螺旋管Ｌは既設管渠Ｐ内に残置されてライニングされる。
なお、本発明１の帯状体１を巻回する方法は、特開平６−１４３４２０号公報で示したのと同様である。
そして、製管機１２側の端部が切断されて、既設管渠Ｐ内周面と螺旋管Ｌ外周面との間にグラウト材等の裏込め剤が充填される。
【００３６】
図４は、本発明１の帯状体の別の例を示す縦断面図である。
この例では、補強リブ３８、３８間に断面略Ｗ字状の補強材３９が設けられている以外は図１と同様である。
図４の帯状体を用いて螺旋管を形成する方法は、図３で説明した方法と同様である。
【００３７】
図５は、本発明１の帯状体のさらに別の例を示す縦断面図であり、隣接する帯状体同士が嵌合されている状態を示す。
この例では、一方の帯状部材２の嵌合部２４の側端側には、他方の帯状部材３の係止部３４が嵌合したときに隣接する基板３２の幅方向に向かって徐々に薄くなるテーパー状をなし、上記係止部３４と重なり合い、重なり部の厚みが略一定となるような、テーパー状の突出部２４ａが設けられている。
この重なり部を設けることにより、螺旋管を形成したときに、上記嵌合部２４と係止部３４が摺動しても、螺旋管内の通流水は、この部分に入り込むことなく、よって、流水が阻害されることがない。
また、図５の帯状体を用いて螺旋管を形成する方法は、図３で説明した方法と同様である。
【００３８】
図６は、本発明２の帯状体の一例を示す斜視図である。
図６に示すように帯状体１’は硬質塩化ビニル樹脂の押出成形により製せられたもので、２本の主帯状部材４、５、及び、嵌合部材６とからなる。
【００３９】
一方の主帯状部材４は、基板４２と、一側端に設けられた嵌合部４４と、他側部に設けられた側端部４６と、補強リブ４８とからなる。
【００４０】
上記嵌合部４４は二股状とされ、且つ開口端内縁に抜止部４４４が対設されている。
上記側端部４６には下向きに形成された嵌合溝４６２とフランジ部４６４が配設されている。
【００４１】
嵌合部４４と側端部４６との間には、断面Ｔ字状をなす複数の補強リブ４８が等しい間隔をあけて配置されている。各補強リブ４８は、主帯状部材４の基板４２の長手方向に沿って一体的に立設されており、基板４２に対して直交状態に形成された支柱部４８ａと、該支柱部４８ａの先端に支柱部４８ａに対して直交状態で設けられたフランジ部４８ｂとを有している。
【００４２】
他方の主帯状部材５は、基板５２と、一側端に設けられた係止部５４と、他側部に設けられた側端部５６と、補強リブ５８とからなる。
【００４３】
上記係止部５４は、一方の帯状部材５の嵌合部４４内に摺動可能に嵌入係止されている。
上記側端部５６には下向きに形成された嵌合溝５６２とフランジ部５６４が配設されている。
【００４４】
係止部５４と側端部５６との間には、断面Ｔ字状をなす複数の補強リブ５８が等しい間隔をあけて配置されている。各補強リブ５８は、主帯状部材５の基板５２の長手方向に沿って一体的に立設されており、基板５２に対して直交状態に形成された支柱部５８ａと、該支柱部５８ａの先端に支柱部５８ａに対して直交状態で設けられたフランジ部５８ｂとを有している。
【００４５】
嵌合部材６も、同じ硬質塩化ビニル樹脂の押出成形により製せられたものであり、主帯状部材４、５の側端部４６、５６に形成される嵌合溝４６２、５６２に弾圧的に嵌合する嵌合突条６２を有していて、隣接する主帯状部材４、５の側端部４６、５６が当接された状態で嵌合材６が嵌合される。
【００４６】
本発明２の帯状体１’を用いて螺旋管を形成する方法は、図３に示したのと同様であり、本発明２の帯状体’を巻回する方法は、実開平３−８１４９５号公報で示したのと同様である。
そして、図３に示す製管機１２側の端部が切断されて、既設管渠Ｐ内周面と螺旋管Ｌ外周面との間にグラウト材等の裏込め剤が充填される。
【００４７】
図７は、本発明２の帯状体の別の例を示す斜視図、図８はその要部拡大断面図である。
図７に示すように帯状体１”は硬質塩化ビニル樹脂の押出成形により製せられたもので、３本の主帯状部材７、８、８及び、嵌合部材９とからなる。
【００４８】
一方の主帯状部材７は、基板７２と、両側端に設けられた嵌合部７４と、補強リブ７８とからなる。
上記補強リブ７８の構造は図６に示したものと同様である。
【００４９】
他方の主帯状部材８、８は、一側端に設けられた係止部８４と、他側部に設けられた側端部８６とからなる。
上記係止部８４及び側端部８６の構造は図６に示したものと同様である。
【００５０】
嵌合部材９も、同じ硬質塩化ビニル樹脂の押出成形により製せられたものであり、他方の主帯状部材８の側端部８６に形成される嵌合溝８６２に弾圧的に嵌合する嵌合突条９２を有していて、隣接する他方の主帯状部材８、８の側端部８６、８６が当接された状態で嵌合材９が嵌合される。
【００５１】
上記嵌合部７４は図８に示したように二股状とされ、且つ開口端内縁に抜止部７４４が対設されている。
そして、上記嵌合部７４には、他方の主帯状部材８の係止部８４が嵌入係止された状態で嵌合部材９が嵌合したときに嵌合部材９に向かって徐々に薄くなるテーパー状をなし、上記嵌合部材９に設けられた突出部９ａと重なり合い、重なり部の厚みが略一定となるような、テーパー状の突出部７４ａが設けられている。この重なり部を設けることにより、螺旋管を形成したときに、上記嵌合部７４と係止部８４が摺動しても、螺旋管内の通流水は、この部分に入り込むことなく、よって、流水が阻害されることがない。
【００５２】
【発明の効果】
本発明１の帯状体は、上述の如き構成となされているので、螺旋管とされて既設管内を挿通される際に、螺旋管に加わる抵抗力によって螺旋管が破損されることがなく、且つ、隣接する帯状部材同士が嵌合不良を生じることがない。
【００５３】
本発明２の帯状体は、上述の如き構成となされているので、螺旋管とされて既設管内を挿通される際に、螺旋管に加わる抵抗力によって螺旋管が破損されることがなく、且つ、隣接する帯状部材同士が嵌合不良を生じることがない。
【図面の簡単な説明】
【図１】本発明１の帯状体の一例を示す縦断面図である。
【図２】図１の帯状体同士が嵌合されている状態を示す縦断面図である。
【図３】本発明１の帯状体を用いて螺旋管を形成する方法を説明する説明図である。
【図４】本発明１の帯状体の別の例を示す縦断面図である。
【図５】本発明１の帯状体のさらに別の例を示す縦断面図であり、隣接する帯状体同士が嵌合されている状態を示す。
【図６】本発明２の帯状体の一例を示す斜視図である。
【図７】本発明２の帯状体の別の例を示す斜視図である。
【図８】図７の要部拡大断面図である。
【図９】従来の既設管ライニング用帯状体を示す縦断面図である。
【符号の説明】
１、１’、１” 帯状体
２、３帯状部材
２４、４４、７４嵌合部
２４４、４４４、７４４抜止部
３４、５４、８４係止部
２６、３６接手部
４、５、７、８主帯状部材
４６、５６、７６、８６側端部
６、９嵌合部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a strip for an existing pipe lining that is used when an old pipe is repaired.
[0002]
[Prior art]
Metal pipes and fume pipes have long been used for existing pipes used as waterworks and sewers. Such existing pipes may become obsolete due to long-term use and may leak due to cracks or corrosion. For this reason, recently, synthetic resin pipes have been inserted into existing pipes such as aged buried pipes for lining.
[0003]
One of the synthetic resin pipes is a method of lining an existing pipe with a spiral pipe formed by spirally winding a strip made of synthetic resin, and an example of the spiral pipe used in this construction method is This is described in Japanese Utility Model Laid-Open No. 1-75682.
[0004]
As shown in FIG. 9, this spiral tube has a fitting part a at one end and a band-like body c having a locking part b at the other end inserted into an existing pipe while being spirally wound. While slidably fitting and locking the engaging portion b ′ of the adjacent belt-like body c ′ to the fitting portion a of the wound belt-like body, and producing the helical tube by making it in an engaged state, The inner surface of the existing pipe is lined.
[0005]
[Problems to be solved by the invention]
However, in the existing pipe, for example, when the spiral pipe is inserted along the curved existing pipe, the inner peripheral surface of the existing pipe comes into contact with the spiral pipe, so that a large resistance acts on the helical pipe. For this reason, by sequentially feeding the strips to the spiral tube, a propulsive force in the spiral direction acts on the strips constituting the spiral tube, and a force is applied to the spiral tube to expand the diameter. As a result, a large tensile force acts in the width direction of the band-shaped body constituting the spiral tube, and the engagement state between the side ends of the band-shaped body is released by the tensile force, and the spiral tube may be damaged. is there.
[0006]
In addition, when the existing pipe has a large curvature, when the engaging portion b ′ of the adjacent strip c is inserted into the fitting portion a of the strip c on the inner surface of the existing pipe, it is not fitted sufficiently. It may be poor.
[0007]
The present invention solves the above problems, and when the spiral tube is inserted through the existing tube, the spiral tube is not damaged by the resistance force applied to the spiral tube, and the adjacent belt-like members are fitted to each other. An object of the present invention is to provide a strip for an existing pipe lining that does not cause poor bonding.
[0008]
[Means for Solving the Problems]
The existing pipe lining strip according to claim 1 (hereinafter referred to as “present invention 1”) is formed into a helical pipe by being spirally wound and inserted into the existing pipe to be lined. The belt-shaped body is composed of at least two or more belt-shaped members, and the belt-shaped members are bifurcated at one end of one belt-shaped member and have a retaining portion at the inner edge of the opening end. The engaging portion provided at one side end of the other band-like member is slidably fitted and locked to the mating portion provided in the opposite manner, and the portion forming the side end portion of the band-like body is adjacent to the band-like portion. When the body is wound in a spiral shape, a joint portion that is overlapped inside and outside and fits each other is provided.
[0009]
In the belt-like body of the present invention 1, the joining of the belt-like members in one belt-like body is carried out by the engaging portion provided at one side end of one belt-like member and the locking provided at one side end of the other belt-like member. The part is inserted and locked.
[0010]
In the belt-like body of the present invention 1, the joining of the belt-like bodies is overlapped inside and outside when the adjacent belt-like bodies are spirally wound by a joint portion provided at a portion forming the side end portion of the belt-like body. Are fitted together.
[0011]
The belt-like member protrudes to the outer surface side when the belt-like body is spirally wound, if necessary, and the board, the fitting part, the locking part, or the joint part provided on both side ends. And reinforcing ribs provided on the surface.
[0012]
The stroke that allows the locking portion of the belt-like member to slide within the fitting portion fits the circumference difference caused by the difference between the inner and outer diameters that are assumed when the belt-like body is wound spirally. A value obtained by multiplying the value divided by the number of parts by a safety factor of about 1.2 to 2 times is preferable.
[0013]
The size of the reinforcing rib is not particularly limited, and may be appropriately selected depending on the inner diameter of the existing pipe to be lined, the bending angle, the material strength of the strip, etc. For example, when the existing pipe has an inner diameter of 500 mm and a bending angle of 10 degrees. A height of 12 mm, a wall thickness of 2 mm (similar to the substrate), and a radius of about 4 mm are suitable.
[0014]
The existing pipe lining strip according to claim 2 (hereinafter referred to as “present invention 2”) is formed into a spiral pipe by being spirally wound and inserted into the existing pipe to be lined. A bifurcated body, which is composed of at least two main band-shaped members and a fitting member, and the main band-shaped members are provided at one end of one main band-shaped member. In addition, the engaging portion provided on one side end of the other main belt-like member is slidably fitted and engaged with the fitting portion provided with the retaining portion on the inner edge of the opening end, and the adjacent belt-like bodies are connected to each other. The side end portions are brought into contact with each other when wound spirally, and both side end portions can be fitted via the fitting member in a state where the side end portions are in contact with each other. It is what.
[0015]
In the belt-like body of the present invention 2, the joining of the main belt-like members in one belt-like body is provided at one side end of the other main belt-like member at the fitting portion provided at one side end of the one main belt-like member. The engaging portion is inserted and locked.
[0016]
In the belt-like body of the present invention 2, the joining of the belt-like bodies is such that when the belt-like body is wound spirally, the side edges are brought into contact with each other, and the side edges are brought into contact with each other. The portion can be fitted via the fitting member.
[0017]
The main belt-like member protrudes to the outer surface side when the belt-like body is spirally wound, if necessary, and the board, the fitting portion, the locking portion, or the side end portion provided on both side ends. The reinforcing ribs are provided so as to do so.
[0018]
The stroke in which the locking portion of the main belt-shaped member can slide in the fitting portion and the size of the reinforcing rib of the main belt-shaped member are the same as described in the first aspect of the invention.
[0019]
The strips of the present invention 1 and 2 are integrally formed by extrusion molding or the like using a material such as polyvinyl chloride, polyethylene, polypropylene, polycarbonate, polyester, or a resin obtained by reinforcing these resins with glass fibers.
[0020]
(Function)
The belt-like body of the present invention 1 is an existing pipe lining belt-like body inserted into an existing pipe to be lined by being spirally wound into a spiral pipe, and the number of the belt-like bodies is at least two. The belt-shaped members are provided on one side end of one belt-shaped member, and are fitted with a fitting portion having a bifurcated shape and a retaining portion provided on the inner edge of the opening end. The locking portion provided at the side end is slidably fitted and locked, and the portion forming the side end portion of the band-like body is overlapped inside and outside when the adjacent band-like body is wound spirally. Since the fitting portions that are fitted to each other are provided, when the fitting portions are fitted to each other and the belt-like body is wound spirally to form a spiral tube, the first belt-like member is fitted. When the locking portion of the second belt-like member slides in the portion, the spiral tube is caused by the resistance force applied to the spiral tube. Without being damaged, and, strips with adjacent never cause poor fit.
[0021]
The belt-like body of the present invention 2 is a strip-shaped body for existing pipe lining that is formed into a spiral tube by being spirally wound and inserted into an existing pipe to be lined, and there are at least two strip-shaped bodies. The main belt-like member and the fitting member, and the main belt-like members are provided at one side end of one of the main belt-like members and are fitted with a retaining portion on the inner edge of the opening end. The engaging portion provided at one side end of the other main band-like member is slidably fitted and locked to the portion, and the adjacent band-like bodies are wound side by side when they are wound spirally. Since both side end portions can be fitted via the fitting member in a state where the side end portions are in contact with each other, the joint portion and the fitting member are The second main belt-like member is locked within the fitting portion of the first main belt-like member when fitting and winding the belt-like body into a spiral tube. There by sliding, without spiral tube is damaged by the resistance force exerted on the helical tube, and, the belt-shaped member with adjacent never cause poor fit.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing an example of a belt-like body according to the first aspect of the present invention.
[0023]
A strip 1 of the present invention 1 lined on the inner peripheral surface of a sewer pipe is made by extrusion molding of a hard vinyl chloride resin, and comprises two strip members 2, 3 as shown in FIG. .
[0024]
One strip member 2 includes a substrate 22, a fitting portion 24 provided at one side end, and a joint portion 26 provided at the other side portion.
[0025]
The fitting portion 24 has a bifurcated shape, and a retaining portion 244 is provided on the inner edge of the opening end.
[0026]
The joint portion 26 includes a flange portion 262 provided so as to protrude to the outer surface side when the belt-like body 1 is spirally wound, and a semicircular cross-sectional groove 27 formed on the inner surface thereof. And is provided along the longitudinal direction of the substrate 22.
[0027]
The other band-shaped member 3 is formed when the substrate 32, the locking part 34 provided at one side end, the joint part 36 provided at the other side part, and the band-like body 1 are spirally wound. The reinforcing rib 38 is provided so as to protrude to the surface side.
[0028]
The locking portion 34 is slidably fitted and locked in the fitting portion 24 of one of the belt-like members 2.
[0029]
A protrusion 37 having a protrusion height smaller than that of the reinforcing rib 38 is erected on the joint portion 36. The ridge 37 is continuous with the longitudinal direction of the substrate 32, and includes a support column 372 slightly longer than the thickness of the substrate 32, and a hemispherical insertion unit 374 disposed at the tip of the support column 372.
[0030]
Between the locking part 34 and the joint part 36, when the band plate 1 of the present invention 1 is spirally wound, it protrudes to the outer surface side, that is, the protruding direction of the protrusion 37, A plurality of reinforcing ribs 38 having a T-shaped cross section are arranged at equal intervals. Each reinforcing rib 38 is erected integrally with the substrate 32 along the longitudinal direction of the substrate 32, and has a column portion 382 formed orthogonal to the substrate 32 and a tip of the column portion 382. And a flange portion 384 provided in a state orthogonal to the column portion 382.
[0031]
The joint portions 26 and the reinforcing ribs 38 of the first band-shaped member 2 are formed such that the flange portions 262 and 384 are located in the same plane substantially parallel to the substrates 22 and 32.
[0032]
FIG. 2 is a longitudinal cross-sectional view showing a fitted state of the belt-like body shown in FIG.
As shown in FIG. 2, the joint portions 36 of one belt-like member 2 and the other belt-like member 3 are overlapped on the inside and outside when the adjacent belt-like body 1 is spirally wound, so that the second belt-like member is obtained. The ridges 37 are formed by fitting the protrusions 37 of the three joint portions 36 to the concave portions 27 of the joint portions 26 of the one band-shaped member 2.
[0033]
Note that, from the joint part 26 to the fitting part 24 of the one band-shaped member 2, the other band-shaped member is formed when the band plate 1 of the present invention 1 is spirally wound as shown in FIG. A stepped portion 272 that is stepped down toward the concave strip 27 by the thickness of the substrate 32 is formed so that the third end portion 362 to the protrusion 37 can be inserted. A hot melt adhesive (not shown) is applied to the upper surface in the vicinity of the side end portion 362 of the second band-shaped member 3 that can be fitted into the stepped portion 272 to adhere the stepped portion 272 and stop the water. Has been.
[0034]
FIG. 3 is an explanatory view for explaining a method of forming a spiral tube using the band 1 of the present invention 1 in FIG.
[0035]
As shown in FIG. 3, the strip 1 of the present invention 1 unwound from an unwinding machine T installed on the ground is fed into an existing pipe rod P buried underground through a manhole M, and a pipe making machine 12 is wound in the existing pipe rod P, the joint portions at both side edges are joined to form a spiral tube L, and at the same time, the pipe making machine 12 moves to the right as shown by the arrow, and the formed spiral tube L Is left in the existing pipe rod P and lined.
In addition, the method of winding the strip 1 of the present invention 1 is the same as that shown in Japanese Patent Laid-Open No. 6-143420.
And the edge part by the side of the pipe making machine 12 is cut | disconnected, and backfilling agents, such as a grout material, are filled between the existing peripheral surface of the existing pipe rod P and the outer peripheral surface of the helical tube L.
[0036]
FIG. 4 is a longitudinal sectional view showing another example of the belt-like body of the first aspect of the present invention.
This example is the same as FIG. 1 except that a reinforcing member 39 having a substantially W-shaped cross section is provided between the reinforcing ribs 38.
The method of forming a spiral tube using the strip-like body of FIG. 4 is the same as the method described in FIG.
[0037]
FIG. 5 is a longitudinal sectional view showing still another example of the belt-like body of the present invention 1 and shows a state where adjacent belt-like bodies are fitted to each other.
In this example, when the engaging portion 34 of the other belt-like member 3 is fitted to the side end side of the fitting portion 24 of one belt-like member 2, it gradually becomes thinner in the width direction of the adjacent substrate 32. A tapered projecting portion 24a is provided so as to overlap the locking portion 34 and have a substantially constant thickness.
By providing this overlapping portion, even when the fitting portion 24 and the locking portion 34 slide when the spiral tube is formed, the flowing water in the spiral tube does not enter this portion. Is not inhibited.
Moreover, the method of forming a spiral tube using the strip | belt-shaped body of FIG. 5 is the same as the method demonstrated in FIG.
[0038]
FIG. 6 is a perspective view showing an example of the belt-like body of the second aspect of the present invention.
As shown in FIG. 6, the belt-like body 1 ′ is made by extrusion molding of a hard vinyl chloride resin, and includes two main belt-like members 4, 5 and a fitting member 6.
[0039]
One main belt-like member 4 includes a substrate 42, a fitting portion 44 provided at one side end, a side end portion 46 provided at the other side portion, and a reinforcing rib 48.
[0040]
The fitting portion 44 has a bifurcated shape, and a retaining portion 444 is provided on the inner edge of the opening end.
The side end portion 46 is provided with a fitting groove 462 and a flange portion 464 formed downward.
[0041]
A plurality of reinforcing ribs 48 having a T-shaped cross section are arranged at equal intervals between the fitting portion 44 and the side end portion 46. Each reinforcing rib 48 is erected integrally along the longitudinal direction of the substrate 42 of the main belt-like member 4, and a column portion 48 a formed perpendicular to the substrate 42 and the tip of the column portion 48 a. And a flange portion 48b provided in a state orthogonal to the column portion 48a.
[0042]
The other main belt-like member 5 includes a substrate 52, a locking portion 54 provided at one side end, a side end portion 56 provided at the other side portion, and a reinforcing rib 58.
[0043]
The locking portion 54 is slidably fitted and locked in the fitting portion 44 of one of the belt-like members 5.
The side end portion 56 is provided with a fitting groove 562 and a flange portion 564 formed downward.
[0044]
A plurality of reinforcing ribs 58 having a T-shaped cross section are disposed at equal intervals between the locking portion 54 and the side end portion 56. Each reinforcing rib 58 is erected integrally along the longitudinal direction of the substrate 52 of the main belt-like member 5, and a column part 58 a formed perpendicular to the substrate 52, and the tip of the column part 58 a And a flange portion 58b provided in a state orthogonal to the column portion 58a.
[0045]
The fitting member 6 is also made by extrusion molding of the same hard vinyl chloride resin, and is elastically inserted into the fitting grooves 462 and 562 formed in the side end portions 46 and 56 of the main belt-like members 4 and 5. The fitting member 6 is fitted with the fitting protrusion 62 to be fitted, and the side end portions 46 and 56 of the adjacent main belt-like members 4 and 5 are in contact with each other.
[0046]
The method of forming the spiral tube using the strip 1 'of the present invention 2 is the same as that shown in FIG. 3, and the method of winding the strip' of the present invention 2 is disclosed in Japanese Utility Model Laid-Open No. 3-81495. This is the same as shown in the publication.
3 is cut, and a backfilling agent such as a grout material is filled between the inner peripheral surface of the existing pipe rod P and the outer peripheral surface of the spiral tube L.
[0047]
FIG. 7 is a perspective view showing another example of the belt-like body according to the second aspect of the present invention, and FIG.
As shown in FIG. 7, the belt-like body 1 ″ is made by extrusion molding of a hard vinyl chloride resin, and includes three main belt-like members 7, 8, 8 and a fitting member 9.
[0048]
One main belt-like member 7 includes a substrate 72, fitting portions 74 provided at both side ends, and reinforcing ribs 78.
The structure of the reinforcing rib 78 is the same as that shown in FIG.
[0049]
The other main belt-like members 8 and 8 include a locking portion 84 provided at one side end and a side end portion 86 provided at the other side portion.
The structure of the locking portion 84 and the side end portion 86 is the same as that shown in FIG.
[0050]
The fitting member 9 is also made by extrusion molding of the same hard vinyl chloride resin, and is fitted to be elastically fitted into the fitting groove 862 formed in the side end portion 86 of the other main belt-like member 8. The fitting member 9 is fitted in a state where the joint rib 92 is provided and the side end portions 86 and 86 of the other adjacent main belt-like members 8 and 8 are in contact with each other.
[0051]
The fitting portion 74 has a bifurcated shape as shown in FIG. 8, and a retaining portion 744 is provided on the inner edge of the opening end.
Then, when the fitting member 9 is fitted to the fitting portion 74 in a state where the locking portion 84 of the other main belt-like member 8 is fitted and locked, the fitting portion 74 gradually becomes thinner toward the fitting member 9. A tapered protrusion 74a is provided which is tapered and overlaps with the protrusion 9a provided on the fitting member 9 so that the thickness of the overlap is substantially constant. By providing this overlapping portion, even when the fitting portion 74 and the locking portion 84 slide when the spiral tube is formed, the flowing water in the spiral tube does not enter this portion. Is not inhibited.
[0052]
【The invention's effect】
Since the belt-like body of the present invention 1 is configured as described above, the helical tube is not damaged by the resistance force applied to the helical tube when it is formed as a helical tube and is inserted through the existing tube, and Adjacent belt-like members do not cause poor fitting.
[0053]
Since the belt-like body of the present invention 2 is configured as described above, the helical tube is not damaged by the resistance force applied to the helical tube when it is formed into a helical tube and inserted through the existing tube, and Adjacent belt-like members do not cause poor fitting.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an example of a belt-like body according to the first aspect of the present invention.
FIG. 2 is a longitudinal sectional view showing a state in which the belt-like bodies of FIG. 1 are fitted together.
FIG. 3 is an explanatory diagram for explaining a method of forming a spiral tube using the belt-like body of the first aspect of the present invention.
FIG. 4 is a longitudinal sectional view showing another example of the belt-like body of the first invention.
FIG. 5 is a longitudinal sectional view showing still another example of the belt-like body of the present invention 1, and shows a state where adjacent belt-like bodies are fitted to each other.
FIG. 6 is a perspective view showing an example of a belt-like body according to the second aspect of the present invention.
FIG. 7 is a perspective view showing another example of the belt-like body according to the second aspect of the present invention.
8 is an enlarged cross-sectional view of a main part of FIG.
FIG. 9 is a longitudinal sectional view showing a conventional strip lining for pipe lining.
[Explanation of symbols]
1, 1 ', 1 "strip-shaped body 2, 3 strip-shaped members 24, 44, 74 fitting portions 244, 444, 744 retaining portions 34, 54, 84 locking portions 26, 36 joint portions 4, 5, 7, 8 main Band-shaped members 46, 56, 76, 86 Side end portions 6, 9 Fitting members

Claims

It is an existing pipe lining strip inserted into an existing pipe to be lined by being spirally wound into a spiral pipe,
The band-shaped body is composed of at least two band-shaped members, and the band-shaped members are provided at one side end of one band-shaped member, and have a bifurcated shape and a fitting portion provided with a retaining portion on the inner edge of the opening end. In addition, a locking portion provided at one side end of the other band-shaped member is slidably fitted and locked, and the adjacent band-shaped body is spirally wound around the portion forming the side end of the band-shaped body. An existing pipe lining belt-like body characterized in that a joint portion is provided which is overlapped inside and outside and fitted to each other.

It is an existing pipe lining strip inserted into an existing pipe to be lined by being spirally wound into a spiral pipe,
The band-shaped body is composed of at least two main band-shaped members and a fitting member, and the main band-shaped members are bifurcated at one side end of one main band-shaped member and secured to the inner edge of the open end. The engaging part provided on one side end of the other main belt-like member is slidably fitted and locked to the fitting part in which the parts are opposed to each other, and the adjacent belt-like bodies are wound spirally. The side end portions are brought into contact with each other when the side ends are brought into contact with each other, and both side end portions can be fitted via the fitting member. Strip for existing pipe lining.