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JP3779037B2 - Strip for existing pipe lining - Google Patents

Strip for existing pipe lining Download PDF

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Publication number
JP3779037B2
JP3779037B2 JP19407897A JP19407897A JP3779037B2 JP 3779037 B2 JP3779037 B2 JP 3779037B2 JP 19407897 A JP19407897 A JP 19407897A JP 19407897 A JP19407897 A JP 19407897A JP 3779037 B2 JP3779037 B2 JP 3779037B2
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JP
Japan
Prior art keywords
strip
substrate
belt
existing pipe
width direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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JP19407897A
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Japanese (ja)
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JPH1134165A (en
Inventor
康 北山
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Sekisui Chemical Co Ltd
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Sekisui Chemical Co Ltd
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Priority to JP19407897A priority Critical patent/JP3779037B2/en
Publication of JPH1134165A publication Critical patent/JPH1134165A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1655Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section a pipe being formed inside the old pipe by winding strip-material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56Winding and joining, e.g. winding spirally
    • B29C53/58Winding and joining, e.g. winding spirally helically
    • B29C53/78Winding and joining, e.g. winding spirally helically using profiled sheets or strips
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/26Lining or sheathing of internal surfaces
    • B29C63/30Lining or sheathing of internal surfaces using sheet or web-like material
    • B29C63/32Lining or sheathing of internal surfaces using sheet or web-like material by winding helically

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

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】
既設管のライニング工法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、例えば特公平3−48392号公報に開示されている。この方法では、既設管ライニング用の帯状体螺旋状に巻回して、螺旋状に巻回された帯状体の隣接する側縁部同士を係合状態とすることにより螺旋管を製造し、製造された螺旋管を既設管内に挿入することにより既設管内面を螺旋管によってライニングするようになっている。
【0004】
上記既設管ライニング用帯状体では、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各側縁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。
【0005】
特に螺旋管が挿入される下水管が湾曲している場合には、下水管内へ挿入される螺旋管が湾曲部分に到達すると、下水管内周面と螺旋管先端部外周面とが接触して、螺旋管には大きな抵抗力が加わる。そして、螺旋管が下水管に沿って湾曲することにより、螺旋管を構成している帯状体には、幅方向に引っ張り力が作用する。
【0006】
そこで、帯状体が幅方向へ伸縮可能になるように、その一部を波形状とすることにより、帯状体の幅方向に引っ張り力を吸収することも試行されているが、この場合には、帯状体が螺旋管とされた場合に、帯状体に形成された波形部分によって該螺旋管内周面に螺旋状の溝部が形成される。螺旋管内の通流水は、この溝部分によって通流が阻害される。
【0007】
そこで、上記の問題を解決するため、波形部分の反対側の表面に弾性部材を充填し、螺旋管の内面が同一平面に位置した状態で伸縮させる方法が提案されている(特開平6−143420号公報)。
この下水管をライニングする螺旋管とされる帯状体は、図8に示すように、帯板状の基板aにその幅方向への引っ張り力を吸収する伸縮部bが、基板aを屈曲させて形成されている。伸縮部b内には、基板aの表面と同一平面内に位置する弾性部材cが圧縮状態で配置されており、螺旋管とされた場合に基板aの幅方向に加わる力は伸縮部bにより吸収され、弾性部材cは螺旋管内周面と同一平面内に位置した状態で伸縮する。このような帯板状の側縁部d、e同士を係合することによって、螺旋状に巻回し、円滑に通流水を通流させることができる螺旋管を得ることができる。
【0008】
【発明が解決しようとする課題】
しかし、上記の螺旋管は、引っ張り力がそれほど大きくない場合には有効であるが、引っ張り力が過大になると、弾性部材の材質にもよるが、伸縮部と弾性部材との界面で剥離が発生したり、弾性部材の変形が過大となり、螺旋管内面に突出する場合もあった。
【0009】
本発明は上記の課題を解決し、既設管内に挿入される際に螺旋管内に加わる引っ張り力が大きくなっても、螺旋管を破損することなく下水管内に挿入することができ、しかも、螺旋管内に円滑に通流水を通流させることができる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。
【0010】
【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の帯状体」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、螺旋状に巻回された際に隣接する帯状体同士が嵌合される接合部である突条が基板の一方の側端部に立設される一方、この突条と嵌合する凹条が基板の他方の側端部に設けられるとともに、これら突条と凹条との間に、該基板に対しその幅方向に作用する引っ張り力を吸収する伸縮部が形成され、さらに前記一方の側端部が、螺旋状に巻回された際に隣接する基板の伸縮部まで達するようになされているものである。
【0011】
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の帯状体」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、幅方向の両端部に接合部が形成されている主帯状部材と、螺旋状に巻回された際に隣接する主帯状部材の接合部同士を当接させた状態で接続する嵌合材とを具備し、前記主帯状部材には、前記主帯状部材には、該主帯状部材に対しその幅方向に作用する引っ張り力を吸収する伸縮部が形成されるとともに、前記嵌合材には、接合部同士を接続したときに前記主帯状部材の伸縮部まで達する突出部が幅方向に設けられているものである。
【0012】
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。
【0013】
本発明1及び2の伸縮部の形状は、波形、多角形型などがあげられる。伸縮部の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】
(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、螺旋状に巻回された際に隣接する帯状体同士が嵌合される接合部である突条が基板の一方の側端部に立設される一方、この突条と嵌合する凹条が基板の他方の側端部に設けられるとともに、これら突条と凹条との間に、該基板に対しその幅方向に作用する引っ張り力を吸収する伸縮部が形成されたものであるから、帯状体に引っ張り力が作用しても、基板に形成されている各伸縮部が基板の幅方向へと広がった状態になり、基板が幅方向へと伸長して帯状体に作用する引っ張り力が吸収される。その結果、螺旋管を破損することなく下水管内に挿入することができる。
【0015】
さらに、一方の側端部が、螺旋状に巻回された際に隣接する帯状体の伸縮部まで達するようになされているため、基板の内周面とは面一状態を維持して広がる。その結果、螺旋管内周面は、段差、溝等が形成されることなく、螺旋管内に円滑に通流水を通流させることができる。
【0016】
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、幅方向の両端部に接合部が形成されている主帯状部材と、螺旋状に巻回された際に隣接する主帯状部材の接合部同士を当接させた状態で接続する嵌合材とを具備し、上記主帯状部材には、該主帯状部材に対しその幅方向に作用する引っ張り力を吸収する伸縮部が形成されたものであるから、帯状体に引っ張り力が作用しても、主帯状部材に形成されている各伸縮部が主帯状部材の幅方向へと広がった状態になり、主帯状部材が幅方向へと伸長して帯状体に作用する引っ張り力が吸収される。その結果、螺旋管を破損することなく下水管内に挿入することができる。
【0017】
さらに、上記嵌合材には、接合部同士を接続したときに主帯状部材の伸縮部まで達する突出部が幅方向に設けられているものであるため、主帯状部材の内周面とは面一状態を維持して広がる。その結果、螺旋管内周面は、段差、溝等が形成されることなく、螺旋管内に円滑に通流水を通流させることができる。
【0018】
【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。
【0019】
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、帯板状の基板12を有しており、該基板12上には、一方の側端部12aから適当な距離を隔てて、接合部である突条14が立設されている。該突条14は、基板12の長手方向に連続している。突条14には、基板12の厚さより若干長い支柱部14aと、支柱部14aの先端に配設された半球状の挿入部14bとを有している。
【0020】
他方の側端部12bには、本発明1の帯状体1が螺旋状に巻回された際に隣接する帯状体1の突条14の挿入部14bが勘合し得る断面半円状の空間を有する断面半円形状に形成された被挿入部16aとフランジ部16bとからなる凹条16が、基板12の長手方向に沿って突条14と同方向へ突出するように設けられている。
【0021】
突条14と凹条16との間には、本発明1の帯状体1が螺旋状に巻回された際に外表面側、即ち突条14の突出方向へと突出するように屈曲された伸縮部18が設けられている。該伸縮部18は、波形形状をなしており突条14の突出方向と同様に突出している。
【0022】
該伸縮部18と突条14との間には、断面T字状をなす複数の補強リブ19が、等しい間隔をあけて配置されている。各補強リブ19は、基板12の長手方向に沿って該基板12と一体的に立設されており、基板12に対して直交状態に形成された支柱部19aと、該支柱部19aの先端に支柱部19aに対して直交状態で設けられたフランジ部19bとを有している。凹条16と各補強リブ19は、それぞれのフランジ部16b、19bが、ほぼ基板12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。
【0023】
側端部12aから突条14までの距離L1は、凹条16から伸縮部18までの距離L2と略等しくされており、図2に示すように本発明1の帯状体1が螺旋状に巻回された際に基板12の側端部12aが、隣接する基板12の伸縮部18まで達するようになされている。
【0024】
なお、上記凹条16から伸縮部18までは、図2に示すように本発明1の帯状体1が螺旋状に巻回された際に、基板12の側端部12aから突条14までが嵌入し得るように、該基板12の厚み分だけ凹条16側に段落ちした段落ち部17が形成されている。段落ち部17に嵌入し得る基板12の側端部12a近傍の上面には、段落ち部17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。
【0025】
図3は、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。
【0026】
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2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2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2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。
【0027】
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29、29間に断面略W字状の補強材21が設けられている以外は図1と同様である。
図4の本発明1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。
【0028】
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、基板32の突条34側の側端部32aは、突条34の突出方向が、隣接する基板32と嵌合したときに隣接する基板32の伸縮部38の立ち上がり部付近から基板32の幅方向の先端部に向かって徐々に薄くなるテーパー状の側端部32aをなし、一方、隣接する基板32の伸縮部38の下部には、上記側端部32aに重なり合い、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38aが設けられている。
それ以外は、図1及び図2で説明したのと同様であるので説明を省略する。
また、図5の本発明1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。
【0029】
図6は、本発明2の帯状体の一例を示す斜視図であり(a)は主帯状部材を、(b)は嵌合材を示す。
図6に示すように帯状体は、主帯状部材4と嵌合材46とからなる。主帯状部材4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、主帯状部材4の幅方向の両端部には接合部42、44が形成され、それぞれの接合部には下向きに形成された嵌合溝43、45とフランジ部42b、44bが形成されている。
主帯状部材4は幅方向へ伸長し得るように2箇所に形成された伸縮部48、48を具備し、該伸縮部48、48との間には、断面T字状をなす複数の補強リブ49が、等しい間隔をあけて配置されている。各補強リブ49は、主帯状部材4の基板41の長手方向に沿って一体的に立設されており、基板41に対して直交状態に形成された支柱部49aと、該支柱部49aの先端に支柱部49aに対して直交状態で設けられたフランジ部49bとを有している。接合部42、44と各補強リブ49は、それぞれのフランジ部42b、44b、49bが、ほぼ基板41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。
【0030】
嵌合材46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の接合部42、44に形成される嵌合溝43、45に弾圧的に嵌合する嵌合突条46aを有していて、図7に示すように隣接する主帯状部材4、4の接合部42、44は互いに当接した状態で嵌合材46によって接続される
そして、上記嵌合材46には、接合部42、44を接続したときに主帯状部材4の伸縮部48まで達する突出部47が幅方向に設けられている。
【0031】
本発明2の帯状体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2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。
【0032】
【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、既設管内に挿入される際に螺旋管内に加わる引っ張り力が大きくなっても、螺旋管を破損することなく下水管内に挿入することができ、しかも、螺旋管内に円滑に通流水を通流させることができる。
【0033】
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、既設管内に挿入される際に螺旋管内に加わる引っ張り力が大きくなっても、螺旋管を破損することなく下水管内に挿入することができ、しかも、螺旋管内に円滑に通流水を通流させることができる。
【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り(a)は主帯状部材を、(b)は嵌合材を示す。
【図7】図6の帯状体の主帯状部材と嵌合材とが嵌合されている状態を示す断面図である。
【図8】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 帯状体
12、22、32 基板
12a、22a、32a 側端部
14、24、34 突条
16、26、36 凹条
18、28、38、48 伸縮部
4 主帯状部材
42、44 接合部
46 嵌合材
47 突出部
[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]
For example, Japanese Patent Publication No. 3-48392 discloses a method of lining an existing pipe with a helical pipe formed by spirally winding a strip made of synthetic resin as one of existing pipe lining methods. Yes. In this method, a spiral tube is manufactured by winding a strip-like body for an existing pipe lining in a spiral shape, and bringing adjacent side edges of the spirally wound strip-like body into an engaged state. The inner surface of the existing pipe is lined with the spiral pipe by inserting the spiral pipe into the existing pipe.
[0004]
In the existing pipe lining strip, for example, when a spiral pipe is inserted along a 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 spiral 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 belt-shaped body constituting the spiral tube, and the engagement state between the side edges of the belt-shaped body is released by the tensile force, and the spiral tube may be damaged. There is.
[0005]
In particular, when the sewage pipe into which the spiral tube is inserted is curved, when the spiral tube inserted into the sewage pipe reaches the curved portion, the inner peripheral surface of the sewage pipe and the outer peripheral surface of the distal end portion of the spiral tube come into contact with each other. A large resistance is applied to the spiral tube. And when a spiral pipe curves along a sewer pipe, a tensile force acts on the strip | belt-shaped body which comprises the spiral pipe in the width direction.
[0006]
Therefore, it has been tried to absorb the tensile force in the width direction of the band-like body by making a part of the wave-like shape so that the band-like body can be expanded and contracted in the width direction. When the strip is a spiral tube, a spiral groove is formed on the inner peripheral surface of the spiral tube by the corrugated portion formed in the strip. The flowing water in the spiral tube is blocked by this groove portion.
[0007]
Therefore, in order to solve the above problem, a method has been proposed in which an elastic member is filled on the opposite surface of the corrugated portion, and the surface is expanded and contracted in a state where the inner surface of the spiral tube is located on the same plane (Japanese Patent Laid-Open No. 6-143420). Issue gazette).
As shown in FIG. 8, the belt-like body that lines the sewer pipe has a belt-like substrate a that has a stretchable portion b that absorbs the tensile force in the width direction, bending the substrate a. Is formed. An elastic member c located in the same plane as the surface of the substrate a is disposed in the stretchable portion b in a compressed state. When the spiral member is a spiral tube, the force applied in the width direction of the substrate a is caused by the stretchable portion b. Absorbed, the elastic member c expands and contracts in a state of being located in the same plane as the inner peripheral surface of the spiral tube. By engaging such strip-shaped side edge portions d and e, a spiral tube that can be spirally wound and smoothly flowed water can be obtained.
[0008]
[Problems to be solved by the invention]
However, the above spiral tube is effective when the tensile force is not so large, but if the tensile force is excessive, peeling occurs at the interface between the stretchable part and the elastic member, depending on the material of the elastic member. In some cases, the elastic member is excessively deformed and protrudes to the inner surface of the spiral tube.
[0009]
The present invention solves the above-mentioned problems, and even when the tensile force applied to the spiral tube increases when inserted into the existing tube, the spiral tube can be inserted into the sewage pipe without being damaged. It is an object of the present invention to provide an existing pipe lining strip that can smoothly flow water.
[0010]
[Means for Solving the Problems]
The existing pipe lining strip according to claim 1 (hereinafter referred to as “the strip of the present invention 1”) is spirally wound to form a spiral pipe and inserted into the existing pipe to be lined. While the strip for the existing pipe lining , a ridge that is a joint to which adjacent strips are fitted when spirally wound is erected on one side end of the substrate, A recess that fits with the protrusion is provided at the other side end of the substrate, and an expansion / contraction portion that absorbs a tensile force acting in the width direction on the substrate between the protrusion and the recess. Further, when the one side end portion is wound spirally, it reaches the expansion / contraction portion of the adjacent substrate .
[0011]
The existing pipe lining strip according to claim 2 (hereinafter referred to as “the strip of the present invention 2”) is spirally wound to form a spiral pipe and inserted into the existing pipe to be lined. a strip for existing pipe lining, contact with the main strips are bonded portion is formed on both ends in the width direction, when the wound helically, the joining portion of the adjacent main strip ; and a insert members to be connected in a state of being, the the main strip, said the main strip is extendable portion for absorbing the tensile forces acting in the width direction with respect to the main strip is formed Rutotomoni, before Symbol fitting material, in which protrusions reaching stretchable portion of the main strips are provided in the width direction when connecting the joint portions.
[0012]
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.
[0013]
Examples of the shape of the stretchable part according to the first and second aspects of the present invention include a waveform and a polygonal shape. The size of the expansion / contraction part 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]
(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, A ridge that is a joint where the strips adjacent to each other are fitted is erected at one side end of the substrate, while a recess that fits with the ridge is formed at the other side end of the substrate. In addition to being provided between the protrusions and the recesses, an expansion / contraction part that absorbs the tensile force acting in the width direction on the substrate is formed. In addition, each stretchable part formed on the substrate is expanded in the width direction of the substrate, and the tensile force acting on the belt-like body is absorbed by the substrate extending in the width direction. As a result, the spiral tube can be inserted into the sewer pipe without being damaged.
[0015]
Furthermore, since one side edge part reaches the expansion-contraction part of an adjacent strip | belt-shaped body when it is wound helically, it spreads maintaining the state with the internal peripheral surface of a board | substrate. As a result, the inner circumferential surface of the spiral tube can smoothly pass the flowing water into the spiral tube without forming a step, a groove or the like.
[0016]
The belt-like body of the present invention 2 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 joined at both ends in the width direction. a main strip which are formed over a substrate upon which is wound helically, and and a insert members to be connected in a state in which the joining portions is abutted adjacent the main strip, the main strip Is formed with a stretchable portion that absorbs the tensile force acting in the width direction on the main belt-like member, so that it is formed on the main belt-like member even if a tensile force acts on the belt-like body. Each expansion / contraction part will be in the state which spread | expanded to the width direction of the main strip | belt-shaped member, the main strip | belt-shaped member expand | extends to the width direction, and the tensile force which acts on a strip | belt-shaped body is absorbed. As a result, the spiral tube can be inserted into the sewer pipe without being damaged.
[0017]
Further, the fitting material is provided with a protruding portion in the width direction that reaches the expansion / contraction portion of the main belt-shaped member when the joint portions are connected to each other, so that the inner peripheral surface of the main belt-shaped member is a surface. Spread in one state. As a result, the inner circumferential surface of the spiral tube can smoothly pass the flowing water into the spiral tube without forming a step, a groove or the like.
[0018]
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.
[0019]
The 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 has a strip-like substrate 12 as shown in FIG. On the substrate 12, a ridge 14 as a joint portion is erected at an appropriate distance from one side end portion 12a. The protrusion 14 is continuous in the longitudinal direction of the substrate 12. The ridge 14 has a column part 14a slightly longer than the thickness of the substrate 12, and a hemispherical insertion part 14b disposed at the tip of the column part 14a.
[0020]
The other side end portion 12b has a semicircular space with a cross section that can be fitted into the insertion portion 14b of the protrusion 14 of the adjacent strip 1 when the strip 1 of the present invention 1 is spirally wound. A concave strip 16 comprising an inserted portion 16 a and a flange portion 16 b formed in a semicircular cross section is provided so as to project in the same direction as the strip 14 along the longitudinal direction of the substrate 12.
[0021]
Between the ridges 14 and the recesses 16, the belt- like body 1 of the present invention 1 is bent so as to protrude in the protruding direction of the ridges 14 when being wound spirally. A telescopic part 18 is provided. The stretchable portion 18 has a wave shape and projects in the same manner as the projecting direction of the protrusion 14.
[0022]
A plurality of reinforcing ribs 19 having a T-shaped cross section are arranged at equal intervals between the stretchable portion 18 and the protrusion 14. Each reinforcing rib 19 is erected integrally with the substrate 12 along the longitudinal direction of the substrate 12, and a support column 19 a formed perpendicular to the substrate 12, and a tip of the support column 19 a. And a flange portion 19b provided in an orthogonal state with respect to the column portion 19a. The concave strip 16 and the reinforcing ribs 19 are formed so that the flange portions 16 b and 19 b are positioned in the same plane substantially parallel to the substrate 12.
[0023]
The distance L 1 from the side end 12a to the protrusion 14 is substantially equal to the distance L 2 from the recess 16 to the stretchable part 18, and the strip 1 of the present invention 1 is spiral as shown in FIG. The side end portion 12a of the substrate 12 reaches the extendable portion 18 of the adjacent substrate 12 when the substrate 12 is wound around.
[0024]
In addition, when the strip | belt-shaped body 1 of this invention 1 is wound spirally as shown in FIG. 2 from the said concave 16 to the expansion-contraction part 18, from the side edge part 12a of the board | substrate 12 to the protrusion 14 is. A stepped portion 17 is formed by stepping toward the concave strip 16 by the thickness of the substrate 12 so that it can be inserted. A hot-melt adhesive (not shown) for adhering the stepped portion 17 and stopping water is applied to the upper surface in the vicinity of the side end portion 12a of the substrate 12 that can be fitted into the stepped portion 17.
[0025]
FIG. 3 is an explanatory diagram for explaining a method of forming a spiral tube using the band 1 of the present invention 1.
[0026]
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 2 is wound in the existing pipe rod P, the joints at both side edges are joined to form a spiral tube L, and at the same time, the pipe making machine 2 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 2 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 helical tube L outer peripheral surface.
[0027]
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 21 having a substantially W-shaped cross section is provided between the reinforcing ribs 29 and 29.
The method of forming a spiral tube using the strip of the invention 1 of FIG. 4 is the same as the method described in FIG.
[0028]
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, the side end portion 32a of the board 32 on the side of the protrusion 34 has a protruding direction of the protrusion 34 from the vicinity of the rising portion of the expansion / contraction part 38 of the adjacent substrate 32 when fitted to the adjacent substrate 32. A tapered side end 32a that gradually becomes thinner toward the front end in the width direction of 32 is formed. On the other hand, a lower portion of the stretchable portion 38 of the adjacent substrate 32 overlaps the side end 32a, A tapered protrusion 38a is provided so that the thickness is substantially constant.
Other than that, it is the same as that described with reference to FIGS.
Moreover, the method of forming a spiral tube using the strip | belt body of this invention 1 of FIG. 5 is the same as the method demonstrated in FIG.
[0029]
6A and 6B are perspective views showing an example of the belt-like body according to the second aspect of the present invention. FIG. 6A shows a main belt-like member, and FIG. 6B shows a fitting material.
As shown in FIG. 6, the belt-like body is composed of a main belt-like member 4 and a fitting material 46. The main belt-like member 4 is made by extrusion molding of a hard vinyl chloride resin, and joining portions 42 and 44 are formed at both ends in the width direction of the main belt-like member 4, and the respective joint portions face downward. The formed fitting grooves 43 and 45 and flange portions 42b and 44b are formed.
The main belt-like member 4 includes stretchable portions 48, 48 formed at two locations so as to extend in the width direction, and a plurality of reinforcing ribs having a T-shaped cross section between the stretchable portions 48, 48. 49 are equally spaced. Each reinforcing rib 49 is erected integrally along the longitudinal direction of the substrate 41 of the main belt-like member 4, and a support column portion 49 a formed orthogonal to the substrate 41, and the tip of the support column portion 49 a And a flange portion 49b provided in a state orthogonal to the column portion 49a. The joint portions 42 and 44 and the reinforcing ribs 49 are formed so that the flange portions 42 b, 44 b and 49 b are located in the same plane substantially parallel to the substrate 41.
[0030]
The fitting material 46 is also made by extrusion molding of the same hard vinyl chloride resin and is elastically fitted into the fitting grooves 43 and 45 formed in the joint portions 42 and 44 of the main belt-like member 4. As shown in FIG. 7, the joint portions 42 and 44 of the adjacent main belt-like members 4 and 4 are connected to each other by the fitting material 46 in contact with each other .
The fitting member 46 is provided with a protruding portion 47 in the width direction that reaches the extendable portion 48 of the main belt-like member 4 when the joint portions 42 and 44 are connected .
[0031]
The method of forming a spiral tube using the strip 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 shown in Japanese Utility Model Laid-Open No. 3-81495. It is the same as that.
And the edge part by the side of the pipe making machine 2 shown in FIG. 3 is cut | disconnected, and backfilling agents, such as a grout material, are filled between the existing peripheral surface of the pipe rod P and the outer peripheral surface of the spiral tube L.
[0032]
【The invention's effect】
Since the belt-like body of the first aspect of the present invention is configured as described above, even if the tensile force applied to the spiral tube increases when inserted into the existing tube, it is inserted into the sewer pipe without damaging the spiral tube. In addition, the flowing water can be smoothly passed through the spiral tube.
[0033]
Since the belt-like body of the present invention 2 is configured as described above, even if the tensile force applied to the spiral tube increases when it is inserted into the existing tube, it is inserted into the sewer pipe without damaging the spiral tube. In addition, the flowing water can be smoothly passed through the spiral tube.
[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.
6A and 6B are perspective views showing an example of a belt-like body according to the second aspect of the present invention, wherein FIG. 6A shows a main belt-like member, and FIG. 6B shows a fitting material.
7 is a cross-sectional view showing a state in which a main belt-like member of the belt-like body of FIG. 6 and a fitting material are fitted.
FIG. 8 is a longitudinal sectional view showing a conventional strip for a pipe lining.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Strip | belt-shaped body 12,22,32 Board | substrate 12a, 22a, 32a Side edge part 14,24,34 Projection 16,26,36 Concave strip 18,28,38,48 Expansion-contraction part 4 Main strip | belt-shaped member 42,44 Joint part 46 Mating material 47 Protruding part

Claims (2)

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
旋状に巻回された際に隣接する帯状体同士が嵌合される接合部である突条が基板の一方の側端部に立設される一方、この突条と嵌合する凹条が基板の他方の側端部に設けられるとともに、これら突条と凹条との間に、該基板に対しその幅方向に作用する引っ張り力を吸収する伸縮部が形成され、さらに前記一方の側端部が、螺旋状に巻回された際に隣接する基板の伸縮部まで達するようになされていることを特徴とする既設管ライニング用帯状体。
It is an existing pipe lining strip that is inserted into an existing pipe to be lined by being spirally wound into a spiral pipe ,
While ridges are joint strips which are adjacent to each other when wound around the screw spirally is fitted is erected on one side edge of the substrate, concave to the protrusion and the fitting Is provided at the other side end of the substrate, and an expansion / contraction portion for absorbing a tensile force acting in the width direction on the substrate is formed between the protrusion and the recess, and the one side is further provided. An existing pipe lining belt-shaped body characterized in that an end portion reaches a stretchable portion of an adjacent substrate when it is wound spirally .
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
方向の両端部に接合部が形成されている主帯状部材と
旋状に巻回された際に隣接する主帯状部材の接合部同士を当接させた状態で接続する嵌合材とを具備し、
前記主帯状部材には、該主帯状部材に対しその幅方向に作用する引っ張り力を吸収する伸縮部が形成されるとともに、
記嵌合材には、接合部同士を接続したときに前記主帯状部材の伸縮部まで達する突出部が幅方向に設けられていることを特徴とする既設管ライニング用帯状体。
It is an existing pipe lining strip that is inserted into an existing pipe to be lined by being spirally wound into a spiral pipe ,
A main belt-like member in which joints are formed at both ends in the width direction ;
When wound on the threaded spirally, connected by being in contact with the junction of the adjacent main strip member and a insert members,
The main belt-shaped member is formed with an expansion / contraction portion that absorbs a tensile force acting in the width direction on the main belt-shaped member,
The front Symbol fitting member, the main strip strip for existing pipe lining protrusion reaching expansion unit is characterized in that provided in the width direction of the case of connecting the joint portions.
JP19407897A 1997-07-18 1997-07-18 Strip for existing pipe lining Expired - Lifetime JP3779037B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19407897A JP3779037B2 (en) 1997-07-18 1997-07-18 Strip for existing pipe lining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19407897A JP3779037B2 (en) 1997-07-18 1997-07-18 Strip for existing pipe lining

Publications (2)

Publication Number Publication Date
JPH1134165A JPH1134165A (en) 1999-02-09
JP3779037B2 true JP3779037B2 (en) 2006-05-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

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JP (1) JP3779037B2 (en)

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Publication number Priority date Publication date Assignee Title
JP4037558B2 (en) * 1999-04-28 2008-01-23 積水化学工業株式会社 Strip-shaped member for spiral tube formation
JP4527872B2 (en) * 2000-11-16 2010-08-18 積水化学工業株式会社 Pipe inner surface lining member and method for manufacturing the same
US10088091B2 (en) 2011-08-05 2018-10-02 Elegant Technical Solutions Pty Limited Method for controlling creep in spirally expandable profile
JP6010437B2 (en) * 2012-11-26 2016-10-19 積水化学工業株式会社 Existing strip rehabilitation strip
JP6783611B2 (en) * 2016-09-30 2020-11-11 積水化学工業株式会社 Band-shaped member for forming a spiral tube
JP6596182B2 (en) * 2017-03-01 2019-10-23 積水化学工業株式会社 Strip member for spiral tube and method for rehabilitation of existing tube
JP7412232B2 (en) * 2020-03-11 2024-01-12 積水化学工業株式会社 Strip member for spiral tube and spiral tube

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