JP4233282B2

JP4233282B2 - Reinforcement member for spiral pipe and method for constructing rehabilitation pipe using the same

Info

Publication number: JP4233282B2
Application number: JP2002233237A
Authority: JP
Inventors: 隆一米田; 経司村上; 智明堀; 要介松下; 恒夫宮川; 直哉尾関; 正和柳川; 正明大日向; 輝明岡部
Original assignee: Kubota CI Co Ltd
Current assignee: Kubota CI Co Ltd
Priority date: 2002-08-09
Filing date: 2002-08-09
Publication date: 2009-03-04
Anticipated expiration: 2022-08-09
Also published as: JP2004069036A

Description

【０００１】
【産業上の利用分野】
この発明は、螺旋管の補強部材およびそれを使用する更生管の施工方法に関し、特にたとえば、老朽化した下水管の内面に沿ってストリップが螺旋状に巻回されて形成される螺旋管の補強部材、およびそれを使用する更生管の施工方法に関する。
【０００２】
【従来技術】
この種の補強部材の一例が特表平６−５１１０７１号（Ｆ１６Ｌ１１／１６）（第１の補強部材），特公平７−８０２３８号（Ｂ２９Ｃ５３／７８）（第２の補強部材），および特公平７−６２５０８号（Ｆ１６Ｌ１１／１６）（第３および第４の補強部材）に開示されている。
【０００３】
第１の補強部材１が取り付けられる帯状のストリップ２は、図１２に示すように、たとえば老朽化した下水管３を更生するためのものであり、この下水管３の内面３ａに沿って螺旋状に巻回して設置される。このように、ストリップ２で形成された螺旋管４に第１の補強部材１を設置する目的は、螺旋管４を形成する際に、螺旋管４の天井部分が自重により垂れ下がることを防止すること、および下水管３と螺旋管４との間に充填された裏込材８が固化する前の状態において、裏込材８の自重等に基づく圧力によって螺旋管４が変形することを防止することである。つまり、下水管３の内径が大きくなるほど螺旋管４の直径も大きくなり、天井部分の垂れ下がり等が生じ易いので、第１の補強部材１を取り付けることによって螺旋管４の剛性を高める必要がある。
【０００４】
このストリップ２には、複数の突起５が互いに平行して形成されている。各突起５は、断面形状がＴ字形であり、ストリップ２の長手方向に形成されている。
【０００５】
第１の補強部材１は、図１２に示すように、断面形状がＷ字形の長尺材であり、突起５と突起５との間に装着されている。第１の補強部材１は、その左右の各側縁が対応する各突起５の鍔状部５ａの内面に係合している。これによって、第１の補強部材１とストリップ２とが互いに結合しており、螺旋管４の剛性を高めることができる。
【０００６】
第２および第３の補強部材６および７は、図１３および図１４に示すように、断面形状が上側に開口する台形および半円形の長尺材であり、第１の補強部材１と同様に、それぞれの左右の各側縁が対応する各突起５の鍔状部５ａの内面に係合しており、螺旋管４の剛性を高めることができる。
【０００７】
第４の補強部材９は、図１５に示すように、管状体であって、管壁に管軸方向に沿って切溝を形成したものである。この第４の補強部材９は、ストリップ２に形成されている各突起５ｂに嵌め込んで取り付けられている。そして、この取り付けられた状態で、第４の補強部材９が突起５ｂの表面の全体を覆っており、第４の補強部材９の下縁がストリップ２の帯状部２ｃに密着している。
【０００８】
また、第１〜第４の補強部材１，６，７，９を使用して下水管３を更生するときは、たとえばまず、ストリップ２を螺旋状に巻回しながらストリップ２の両側縁の接合部２ａを接合して螺旋管４を形成する。しかる後に、補強部材１等を螺旋管４に装着する。次に、補強部材１等が装着された螺旋管４を下水管３の内面３ａに設置する。そして、下水管３の内面３ａと螺旋管４との間に裏込材８を充填する。
【０００９】
【発明が解決しようとする課題】
しかし、第１〜第３の補強部材１等では、各補強部材１等とストリップ２の帯状部との間に螺旋状の閉空間２ｂが形成され、この螺旋状の閉空間２ｂには裏込材８を充填することができないという問題がある。このように、裏込材８が充填されていない部分があると、螺旋管４のその部分に内側から押圧力がかかると、その部分が窪むことがある。このような窪みが螺旋管４の底面に形成されると汚水が溜まるという問題がある。
【００１０】
また、第４の補強部材９は、突起５ｂごとに取り付けられているので、第１〜第３の補強部材１等のように閉空間２ｂができないが、裏込材８が固化したときに、この裏込材８による突起５ｂ（ストリップ２）の保持力が小さいという問題がある。なぜなら、突起５ｂは、裏込材８と接触していないので、裏込材８に直接に保持されておらず、直接的には補強部材９によって保持されているからである。したがって、裏込材８によって螺旋管４を強力に補強できないという問題がある。
【００１１】
ところで、補強部材９および突起５ｂの材質や形状を変更して、補強部材９による突起５ｂの保持力を大きくすることが考えられるが、このようにすると、補強部材９を突起５ｂに装着するときに、大きな力を必要とすることとなり、作業性が低下するという問題がある。
【００１２】
さらに、第１〜第４の補強部材１等を使用する更生管の施工方法では、まず、ストリップ２で螺旋管４を形成した後に、この立体的な形状の螺旋管４の外周面に補強部材１等を装着するものであるので、補強部材１等の装着が困難な作業となる。よって、施工現場での作業時間が長くかかるという問題がある。
【００１３】
それゆえに、この発明の主たる目的は、螺旋管を強力に補強できて、下水管の内面と螺旋管との間の全ての空間に裏込材を充填することができる、螺旋管の補強部材およびそれを使用する更生管の施工方法を提供することである。
【００１５】
【課題を解決するための手段】
第１の発明は、螺旋管の内面を形成する帯状部と、帯状部の一方の面に長手方向に延びて形成され、突条部の先端にアンカ部を有するリブとを備えるストリップを、管の内面に沿って螺旋状に巻回して形成する螺旋管を補強するために、ストリップのリブの１条ごとに取り付けられる補強部材であって、アンカ部の外面に沿って配置される帯状の底部、アンカ部の幅とほぼ同じ大きさの間隔を隔てて底部から延びて形成される一対の側壁部、および側壁部に形成されて、アンカ部に係合される係合部を備え、係合部がアンカ部に係合した状態で、側壁部と帯状部および突条部とが間隔を隔てて配置され、裏込材が充填される空間部分を形成する、螺旋管の補強部材である。
【００１６】
第２の発明は、螺旋管の内面を形成する帯状部と、帯状部の一方の面に長手方向に延びて形成され、突条部の先端にアンカ部を有するリブと、リブの基端部に沿って形成される溝部とを備えるストリップを、管の内面に沿って螺旋状に巻回して形成する螺旋管を補強するために、ストリップのリブの１条ごとに取り付けられる補強部材であって、下縁部を溝部に係合させて突条部の少なくとも一方の側面に密着させた状態でリブに取り付けられる、突条部の高さとほぼ同じ大きさの幅を有する帯状体である、螺旋管の補強部材である。
【００１７】
第３の発明は、螺旋管の内面を形成する帯状部と、帯状部の一方の面に長手方向に延びて形成され、突条部の先端にアンカ部を有するリブとを備えるストリップを、管の内面に沿って螺旋状に巻回する更生管の施工方法において、(a) 帯状の底部、およびアンカ部の幅とほぼ同じ大きさの間隔を隔てて底部から延びて形成され、底部に対する直交方向の長さが、アンカ部の厚みより大きいかつリブの高さより小さい一対の側壁部を備える補強部材を用意し、 (b)補強部材をリブに被せ、(c) 補強部材の側壁部とリブの帯状部および突条部とが間隔を隔てた状態になるように、補強部材を塑性変形させることによってリブに係合させて取り付け、(d)ストリップを管の内面に沿って螺旋状に巻回して隣接するストリップの端部同士を結合し、そして(e) 管の内面とストリップとの間に裏込材を充填することを特徴とする、補強部材を使用する更生管の施工方法ある。
【００１８】
第４の発明は、一方の面にリブが長手方向に延びて形成された帯状のストリップを管の内面に沿って螺旋状に巻回する更生管の施工方法において、(a) 請求項２ないし５のいずれかに記載の補強部材をリブに係合させて取り付け、(b) ストリップを管の内面に沿って螺旋状に巻回して隣接するストリップの端部同士を結合し、そして(c) 管の内面とストリップとの間に裏込材を充填することを特徴とする、補強部材を使用する更生管の施工方法である。
【００１９】
【作用】
第１の発明の螺旋管の補強部材によると、補強部材をストリップのリブに装着するときには、側壁部に形成される係合部をリブのアンカ部に係合させればよい。たとえば、補強部材をリブのアンカ部に被せて、側壁部をかしめる等の塑性変形させることによって、補強部材をリブに係合させることができる。これによって、補強部材をストリップに取り付けることができる。
【００２０】
そして、補強部材が取り付けられたストリップを使用して螺旋管を形成すると、補強部材は、側壁部とアンカ部との係合によって、アンカ部に対する長手方向の相対的変位が拘束される。したがって、補強部材によって螺旋管を強固に補強できる。つまり、この補強部材によると、螺旋管を形成する際に、螺旋管の天井部分が自重により垂れ下がることを防止できる。そして、下水管と螺旋管との間に充填された裏込材が固化する前の状態において、裏込材の自重等に基づく圧力によって螺旋管が変形することを防止できる。
【００２１】
また、このストリップに取り付けられた補強部材によると、リブの１条ごとに補強部材が取り付けられるので、補強部材とストリップとの間に閉空間が形成されないようにすることができる。したがって、ストリップによって形成された螺旋管と管（下水管等）の内面との間の空間に裏込材を充填したときに、この裏込材をその空間の隅々まで行き渡らせることができる。
【００２２】
さらに、補強部材を塑性変形させてリブに装着した状態で、この補強部材とストリップの帯状体とが互いに間隔を隔てて配置される。これによって、両者間に形成されたその空間部分に裏込材が充填されたときに、裏込材がリブの補強部材によって覆われていない部分に密着することができる。よって、裏込材が固化したときに、この裏込材によってリブを強力に保持できる。
【００２４】
第２の発明の螺旋管の補強部材によると、この補強部材をストリップのリブに装着するときは、補強部材をストリップに形成されている溝部に係合させて、リブの突条部の側面に沿わせて配置すればよい。このように補強部材がリブに装着された状態で、裏込材が充填されると、裏込材がリブに形成されているアンカ部に接触することができる。よって、裏込材が固化したときに、この裏込材がリブを強力に保持する。これ以外は、第１の発明と同様に作用するので、その説明を省略する。
【００２５】
第３および第４の発明の補強部材を使用する更生管の施工方法によると、ストリップを使用して螺旋管を形成する前に、第１または第２の発明の対応する補強部材をストリップに装着する。しかる後に、補強部材が装着されたストリップを使用して螺旋管を形成する。
【００２６】
【発明の効果】
この発明の螺旋管の補強部材によれば、管（下水管等）の内面と螺旋管との間に充填された裏込材が固化したときに、この裏込材がリブに直接密着してリブを強力に保持するので、強固な更生管を形成できる。つまり、たとえば地震動等によってストリップに外力がかかった場合でも、ストリップの垂れ下がりやめくれを確実に防止できる。
【００２７】
そして、第３の発明の補強部材を使用する更生管の施工方法によると、従来のように補強部材を弾性変形させてリブに取り付ける必要がなく、補強部材をアンカ部に被せればよいので、補強部材を小さい力で容易にリブに取り付けることができる。なお、補強部材がリブから外れないようにするために、補強部材を塑性変形させてリブに係合させる必要があるが、この作業はジグ（治具）等を使用して行うことができるので、作業者の負担を小さくすることができる。
【００２８】
第３および第４の発明の補強部材を使用する更生管の施工方法によると、第１または第２の発明の対応する補強部材を使用して管を更生しているので、それぞれの補強部材の効果を有する更生管を形成することができる。
【００２９】
この発明の上述の目的，その他の目的，特徴および利点は、図面を参照して行う以下の実施例の詳細な説明から一層明らかとなろう。
【００３０】
【実施例】
この発明に係る螺旋管の補強部材（以下、単に「補強部材」と言うこともある。）、およびこの補強部材を使用する更生管の施工方法の第１実施例を図１〜図５を参照して説明する。この補強部材１０が取り付けられるストリップ１６は、たとえば老朽化した下水管１４を更生するために、あるいは新設の下水管１４の内面１４ａを保護するために、下水管１４の内面１４ａに沿って螺旋状に巻回されてその幅方向側縁どうしをジョイナ１２で接合して螺旋管（内管）１８を形成するためのものである。この実施例では下水管１４はヒューム管である。もちろん、この発明は、ヒューム管以外のたとえば合成樹脂製管や金属製管の下水管にも適用することができる。図５は、補強部材１０を使用した螺旋管１８によって更生された下水管１４の概略断面図である。
【００３１】
ストリップ１６は、たとえば硬質塩化ビニル等のような合成樹脂の押出成形によって連続的に形成されるものであり、図４に示す帯状の本体（帯状部）２０を含む。本体２０の一方の面には、下水管１４の内面に向かって突出する断面略Ｔ字状のリブが脚部２２として形成されている。この脚部２２は、本体２０の長手方向に延びて形成された帯状の突条部２２ａ、およびこの突条部２２ａの先端に形成されたアンカ部２２ｂを備えている。アンカ部２２ｂは、本体２０と平行し、その中央部が突条部２２ａと結合している。この脚部２２は、下水管１４とストリップ１６との間に充填される裏込材４４に係合して、ストリップ１６が裏込材４４から外れ難くするためのものである。また、本体２０の幅方向両側縁には、条溝２４，２４が形成されている。各条溝２４は、本体２０に近い第１壁２６と本体２０から遠い第２壁２８とによって形成され、第２壁２８の内面には、図４に示すように、断面略鋸歯状の突起３０，３０が条溝２４に沿って連続して形成されている。また、各条溝２４の底部には、下水管１４の内面に向かって突出する断面略Ｔ字状のリブが脚部３２として形成されている。これら脚部２２，条溝２４，第１壁２６，第２壁２８，突起３０および脚部３２は、本体２０の長手方向に沿ってその全体に亘って形成されている。
【００３２】
ジョイナ１２は、たとえば硬質塩化ビニル等のような硬質合成樹脂の押出成形によって連続的に形成された帯状の本体３４を含む。図４に示すように、本体３４の幅方向両端部のそれぞれの外面には、ストリップ１６の条溝２４に嵌合される突条３６、および挟持部３８が突出して形成されている。これら突条３６および挟持部３８は、互いに協働してストリップ１６の第２壁２８を挟持する。挟持部３８は、屈曲しており、その屈曲部が第２壁２８と突起を介して係合している。そして、突条３６には、第２壁２８に形成された突起３０と係合される断面略鋸歯状の突起４０が形成されている。この突条３６，挟持部３８および突起４０は、本体３４の長手方向に沿ってその全体に亘って連続して形成されている。さらに、本体３４の外面の中央寄りの位置には、突条として形成されたアンカ部４２を所定の間隔を隔てて２条設けてある。このアンカ部４２は、下水管１４とジョイナ１２との間に充填される裏込材４４に係合して、ジョイナ１２がストリップ１６および裏込材４４から外れ難くするためのものである。そして、ストリップ１６およびジョイナ１２は、図４に示すように左右対称に形成されている。
【００３３】
補強部材１０は、材質がたとえば鋼等の金属製であって、長尺物である。この補強部材１０は、図３（ｂ）に示すように、ストリップ１６に装着して使用するものであり、図１に示すように、底部４６と側壁部４８とを備えている。
【００３４】
補強部材１０は、たとえば所定の幅および厚みで形成された帯状体を、その幅方向両側の各縁部を約９０°屈曲形成したものであり、断面形状がコ字形状である。この補強部材１０は、屈曲して形成された左右の側壁部４８と、この側壁部４８の間に形成されている底部４６とからなっている。底部４６の幅は、アンカ部２２ｂの幅よりも少し広く、アンカ部２２ｂを底部４６の内面に沿わせた状態で、左右の側壁部４８の内側に装着できる寸法である。そして、各側壁部４８の底部４６に対する直交方向の長さは、アンカ部２２ｂの幅方向縁部の厚みよりも少し長い寸法である。
【００３５】
この補強部材１０は、図３に示すように、脚部２２のアンカ部２２ｂに被せた状態で、左右の各側壁部４８の下縁を内側に向かって約４５°折り曲げることによって，アンカ部２２ｂに取り付けることができる。このように各側壁部４８の下縁を折り曲げた状態で、この屈曲部４８ａの内面がアンカ部２２ｂの両側の各縁部の下縁を押圧する状態となる。なお、各屈曲部４８ａを形成するための各側壁部４８の下縁の折り曲げは、かしめ等の塑性変形によって行われる。塑性変形は、たとえば治具等によって行われる。
【００３６】
このように、両側の側壁部４８の下縁を折り曲げているのは、図３（Ｂ）に示すように、補強部材１０に係合するストリップ１６が、このストリップ１６の全長にわたっていずれの部分でも、補強部材１０から外れてめくれ難くするためである。なお、補強部材１０に形成する屈曲部４８ａは、補強部材１０の長手方向に沿って或る一定の間隔ごとに形成してある。屈曲部４８ａを形成する間隔は、補強部材１０がストリップ１６を確実に保持できるように規定されている。
【００３７】
次に、下水管１４の内面１４ａに螺旋管１８を形成する手順、すなわち、補強部材１０を使用する更生管の施工方法を各図を参照して説明する。まず、図１に示す補強部材１０、および図２（Ａ）に示すストリップ１６を準備する。そして、図２（Ｂ）に示すように、補強部材１０をストリップ１６に形成されている脚部２２，３２（以下、脚部２２と言う。）の１条ごとに被せる。このように、補強部材１０は、脚部２２の１条ごとに被せるものであり、２条または３条以上の脚部２２に跨って被せるものではない。そして、この補強部材１０は、ストリップ１６に形成されている複数条の脚部２２に対して１条おきに被せてある。もちろん、２条おきに補強部材１０を被せてもよいし、全ての脚部２２に被せてもよい。要は、ストリップ１６自体の強度および螺旋管１８の直径に応じて、螺旋管１８を適切に補強できるように、適切な本数の補強部材１０を使用すればよい。
【００３８】
次に、図３（Ａ）に示すように、脚部２２に被せられた補強部材１０の左右の側壁部４８の下縁を、治具等を使用して塑性変形させて折り曲げる。これによって屈曲部４８ａを形成する。屈曲部４８ａは、補強部材１０の長手方向に沿って或る一定の間隔ごとに形成してある。これで、各屈曲部４８ａの内面がアンカ部２２ｂの両側の各縁部の下縁を押圧して係合する状態となり、補強部材１０とストリップ１６とが互いに結合する。そして、この状態で底部４６の内面がアンカ部２２ｂの外面に密着する。これによって、補強部材１０は、ストリップ１６の脚部２２に対して、図３（Ａ）の上下方向および左右方向に変位しないように固定され、しかも、補強部材１０は、ストリップ１６のアンカ部２２ｂに対する長手方向の相対的な変位が拘束された状態でストリップ１６に固定される。
【００３９】
ただし、補強部材１０のストリップ１６に対する装着は、ストリップ１６およびジョイナ１２を螺旋状に巻回して螺旋管１８を形成する前の段階で行う。たとえば、工場や施工現場において、図３（Ａ）に示すように、予め補強部材１０をストリップ１６に装着しておく。
【００４０】
しかる後に、図３（Ｂ）に示すように、下水管１４の内面１４ａに沿って補強部材１０が装着されたストリップ１６を螺旋状に巻回するとともに、ストリップ１６の幅方向縁部どうしをジョイナ１２で接合して螺旋管１８を形成する。次に、下水管１４の内面１４ａと螺旋管１８との間に裏込材４４を充填する。これで補強部材１０が装着されたストリップ１６を使用する更生管の施工が終了する。
【００４１】
なお、この裏込材４４は、セメントミルク等のようなモルタルである。このモルタルは、流動性が良好であり、比較的短時間で固化するように添加物が配合されているものである。ストリップ１６およびジョイナ１２に形成されている脚部２２，３２およびアンカ部４２は、この裏込材４４内に埋め込まれ、裏込材４４の硬化後は、これら脚部２２等およびアンカ部４２が裏込材４４に強固に固定される。また、ストリップ１６とジョイナ１２とを接合するときは、ジョイナ１２の一対の各突条３６をストリップ１６の一対の各条溝２４に嵌め込む。これによって、ストリップ１６の幅方向側縁どうしをジョイナ１２によって接合することができる。
【００４２】
図１に示す第１実施例の補強部材１０によると、従来のように補強部材１０を弾性変形させて脚部２２に取り付ける必要がなく、補強部材１０を脚部２２に形成されているアンカ部２２ｂに被せればよいので、補強部材１０を小さい力で容易に脚部２２に取り付けることができる。なお、補強部材１０が脚部２２から外れないようにするために、補強部材１０の側壁部４８を塑性変形させて屈曲部４８ａを形成して、この屈曲部４８ａを脚部２２に係合させる必要があるが、この作業は治具や道具等を使用して行うことができるので、作業者の負担を小さくすることができる。
【００４３】
そして、補強部材１０が取り付けられたストリップ１６を使用して螺旋管１８を形成すると、補強部材１０は、側壁部４８とアンカ部２２ｂとの係合によって、アンカ部２２ｂに対する長手方向の相対的変位が拘束される。したがって、下水管１４の内面１４ａに螺旋管１８が設置された状態で、補強部材１０によって螺旋管１８を強固に補強できる。つまり、裏込材４４が固化していない状態では、裏込材４４によって螺旋管１８を保持できないが、補強部材１０によって螺旋管１８を保持することができる。よって、裏込材４４が固化していない状態、および固化している状態の両方の状態で、ストリップ１６のたとえば天井部分の垂れ下がりやめくれ、さらに変形を確実に防止できる。もちろん、この補強部材１０によれば、螺旋管１８を形成する際に、螺旋管１８の天井部分が自重により垂れ下がることも防止できる。
【００４４】
また、このストリップ１６に取り付けられた補強部材１０によると、脚部２２の１条ごとに補強部材１０が取り付けられるので、補強部材１０をストリップ１６に取り付けた状態で、補強部材１０とストリップ１６との間に閉空間が形成されないようにすることができる。したがって、図３（Ｂ）に示すように、ストリップ１６およびジョイナ１２によって形成された螺旋管１８と下水管１４の内面１４ａとの間の空間５２等に裏込材４４を充填するときに、裏込材４４をその空間５２等の隅々まで行き渡らせることができる。
【００４５】
このようにして、十分な強度の更生管を形成することができるので、ストリップ１６の部分に内側から押圧力がかかった場合でも、その部分に窪みができることがない。これによって、螺旋管１８の底面に汚水が溜まるということがない。もちろん、ジョイナ１２の部分に押圧力がかかった場合でも、窪みができないので汚水が溜まることがない。
【００４６】
さらに、補強部材１０を塑性変形させて脚部２２に装着した状態で、この補強部材１０とストリップ１６の本体２０とが互いに間隔を隔てて配置される。これによって、両者間に形成されたその空間５４に裏込材４４が充填され、裏込材４４が脚部２２の突条部２２ａおよびアンカ部２２ｂの内面に直接密着して脚部２２を強力に保持するので、強固な更生管を形成できる。つまり、たとえば地震動等によってストリップ１６に外力がかかった場合でも、ストリップ１６の垂れ下がりやめくれを確実に防止できる。
【００４７】
そして、この補強部材１０を使用する更生管の施工方法によると、ストリップ１６およびジョイナ１２を使用して螺旋管１８を形成する前に、補強部材１０をストリップ１６に係合させて装着するので、立体的な形状の螺旋管１８の外周面に補強部材１０を装着する場合と比較して、補強部材１０を容易にストリップ１６に装着することができる。よって、施工現場での作業時間を従来よりも短縮することができるし、労力を軽減できる。もちろん、工場で補強部材１０をストリップ１６に装着することによって、その分だけ施工現場での作業時間を短縮できるし、その労力を軽減できる。
【００４８】
次に、この発明に係る補強部材、およびこの補強部材を使用する更生管の施工方法の第２実施例を図６等を参照して説明する。
【００４９】
図１に示す第１実施例の補強部材１０と、図６に示す第２実施例の補強部材６０とが相違するところは、補強部材１０および６０に形成されている左右の各側壁部４８の底部４６に直交する方向の寸法が第２実施例の方が第１実施例よりも長く形成されているところと、屈曲部４８ａの長さが第２実施例の方が第１実施例よりも長いところである。
【００５０】
このように、補強部材６０は、左右の各側壁部４８の底部４６に直交する方向の寸法が第１実施例よりも長く形成されているので、図６（Ｃ）に示すように、下水管１４内に螺旋状に設置された状態で、断面二次モーメントを第１実施例よりも大きくすることができる。したがって、第２実施例の補強部材６０は、第１実施例の補強部材よりも強力に螺旋管１８を補強することができるし、強固な更生管を形成することができる。これ以外の構成および作用は、第１実施例と同等であるので、それらの詳細な説明を省略する。
【００５１】
また、下水管１４の内面１４ａに螺旋管１８を形成する手順、すなわち、補強部材６０を使用する更生管の施工方法は、第１実施例と同等である。つまり、まず、図６（Ａ）に示すように補強部材６０を予め定めた脚部２２に被せる。そして、図６（Ｂ）に示すように、補強部材６０の左右の側壁部４８を内側に所定の角度だけ塑性変形させてアンカ部２２ｂに係合させる。次に、図６（Ｃ）に示すように、補強部材６０が装着されたストリップ１６およびジョイナ１２を使用して、下水管１４の内側に螺旋管１８を形成して、下水管１４の内面１４ａと螺旋管１８との間の空間５２に裏込材４４を充填する。これで更生管の施工が終了する。
【００５２】
次に、この発明に係る補強部材、およびこの補強部材を使用する更生管の施工方法の第３実施例を図７等を参照して説明する。
【００５３】
図１に示す第１実施例の補強部材１０と、図７に示す第３実施例の補強部材６２とが相違するところは、第１実施例の底部４６は平坦な帯状体であるのに対して、第３実施例の底部４６は、中央に外方に向かって突出する突条６４を長手方向に沿って形成したところである。この突条６４は、断面形状がほぼ半円形であり、底部４６を屈曲して形成されている。
【００５４】
このように、補強部材６２は、底部４６に突条６４が形成されているので、図７（Ｃ）に示すように、下水管１４内に螺旋状に設置された状態で、断面二次モーメントを第１実施例よりも大きくすることができる。したがって、第３実施例の補強部材６２は、第１実施例の補強部材１０よりも強力に螺旋管１８を補強することができるし、強固な更生管を形成することができる。補強部材６２のこれ以外の構成および作用は、第１実施例と同等であるので、それらの詳細な説明を省略する。また、補強部材６２を使用する更生管の施工方法も、図７に示すように、第１実施例と同等であるので、その詳細な説明を省略する。
【００５５】
次に、この発明に係る補強部材、およびこの補強部材を使用する更生管の施工方法の第４実施例を図８等を参照して説明する。
【００５６】
図１に示す第１実施例の補強部材１０と、図８に示す第４実施例の補強部材６６とが相違するところは、第１実施例では補強部材１０を脚部２２に被せた状態で、左右の各側壁部４８の下縁を屈曲させて（塑性変形させて）屈曲部４８ａを形成し、この屈曲部４８ａを脚部２２のアンカ部２２ｂに係合させるのに対して、第４実施例では左右の各側壁部４８の下縁の内側に係合部６８を形成してあり、この係合部６８をアンカ部２２ｂの幅方向縁部の下縁に係合させるところである。この係合部６８は、断面形状がほぼ直角三角形の突条（爪）であり、アンカ部２２ｂの下縁と当接する面がストリップ１６の本体２０と平行しており、補強部材６６がアンカ部２２ｂから外れ難くしてある。そして、補強部材６６をアンカ部２２ｂに装着し易くするために、係合部６８の内面が下方に向かって外側に広がるように形成されている。
【００５７】
この補強部材６６を使用して更生管を施工するときは、補強部材６６をストリップ１６の予め定めた脚部２２のアンカ部２２ｂに被せて押し込めばよい。このように、補強部材６６をアンカ部２２ｂに押し込むことによって左右の各側壁部４８が弾性変形して外側に開き、補強部材６６がアンカ部２２ｂに装着された状態となる。この装着された状態で、図８に示すように、補強部材６６の各側壁部４８に形成されている各係合部６８が、アンカ部２２ｂの幅方向縁部の下縁に係合した状態となり、第１実施例と同様に、補強部材６６とストリップ１６とが結合した状態となる。
【００５８】
補強部材６６のこれ以外の構成および作用は、第１実施例と同等であるので、それらの詳細な説明を省略する。また、補強部材６６を使用する更生管の施工方法も、これ以外は第１実施例と同等であるので、その詳細な説明を省略する。
【００５９】
次に、この発明に係る補強部材、およびこの補強部材を使用する更生管の施工方法の第５実施例を図９等を参照して説明する。
【００６０】
図８に示す第４実施例の補強部材６６と、図９に示す第５実施例の補強部材７０とが相違するところは、係合部６８，７２の形状が相違するところである。この第５実施例の係合部７２は、図９に示すように、左右の各側壁部４８を波形（ほぼＳ字形）に屈曲して形成されたものである。つまり、左右の各側壁部４８は、底部４６の幅方向縁部に近い上部が外側に突出する湾曲部として形成され、下部（先端部）が内側に突出する湾曲部として形成されている。この下部に形成されている湾曲部が係合部７２である。この係合部７２は、補強部材７０をアンカ部２２ｂに装着し易くするために、係合部７２の内面が下方に向かって外側に広がるように形成されている。
【００６１】
この補強部材７０を使用して更生管を施工するときは、第４実施例と同様に、まず、補強部材７０をストリップ１６の予め定めた脚部２２のアンカ部２２ｂに被せて押し込めばよい。このように、装着された状態で、図９に示すように、補強部材７０の各係合部７２が、アンカ部２２ｂの幅方向縁部の下縁に係合した状態となり、第４実施例と同様に、補強部材７０とストリップ１６とが結合した状態となる。
【００６２】
補強部材７０のこれ以外の構成および作用は、第４実施例と同等であるので、それらの詳細な説明を省略する。また、補強部材７０を使用する更生管の施工方法は、第４施例と同等であるので、その詳細な説明を省略する。
【００６３】
次に、この発明に係る補強部材、およびこの補強部材を使用する更生管の施工方法の第６実施例を図１０等を参照して説明する。
【００６４】
この第６実施例の補強部材７４が取り付けられる図１０に示すストリップ１６は、図１に示すストリップ１６に形成されているそれぞれの脚部２２の基端部に沿って、その両側に溝７６を形成したものである。
【００６５】
補強部材７４は、図１０に示すように、厚みが脚部２２の突条部２２ａの厚みとほぼ同じ寸法であって、幅が突条部２２ａの高さ（溝７６の底からアンカ部２２ｂの内面までの高さ）とほぼ同じ寸法に形成された帯状体である。
【００６６】
この補強部材７４を使用して更生管を施工するときは、第４実施例と同様に、まず、補強部材７４およびとストリップ１６を準備して、図１０（Ａ）に示すように、補強部材７４をストリップ１６の脚部２２に装着する。補強部材７４をストリップ１６の脚部２２に装着するときは、補強部材７４の下縁部をストリップ１６に形成されている溝７６に係合させて、補強部材７４を脚部２２の突条部２２ａの側面に押し付けて密着させた状態にすればよい。補強部材７４は、突条部２２ａの両方の側面に装着される。もちろん、突条部２２ａのいずれか一方の側面に装着してもよい。このように補強部材７４が装着された状態で、図１０（Ａ）に示すように、各補強部材７４が突条部２２ａの各側面に密着しており、各補強部材７４の下縁部が溝７６に嵌め込まれて係合し、各上縁部がアンカ部２２ｂの内面に圧接した状態となり、上記各実施例と同様に、補強部材７４とストリップ１６とが結合した状態となる。
【００６７】
次に、図１０（Ｂ）に示すように、補強部材７６が装着されたストリップ１６およびジョイナ１２によって螺旋管１８が形成された状態で、裏込材４４が充填されると、裏込材４４が脚部２２に形成されているアンカ部２２ｂの内面および側面に密着することができる。よって、裏込材４４が固化したときに、この裏込材４４が脚部２２を強力に保持することができる。
【００６８】
補強部材７６のこれ以外の構成および作用は、第４実施例と同等であるので、それらの詳細な説明を省略する。また、補強部材７６を使用する更生管の施工方法も、これ以外は第４実施例と同等であるので、その詳細な説明を省略する。
【００６９】
次に、この発明に係る補強部材、およびこの補強部材を使用する更生管の施工方法の第７実施例を図１１等を参照して説明する。
【００７０】
この第７実施例の補強部材７８が取り付けられる図１１に示すストリップ１６は、図１に示すストリップ１６に形成されているそれぞれの脚部２２の基端部に沿って、その基端部と隙間を隔ててその両側に突起８０を形成したものである。
【００７１】
補強部材７８は、図１１に示すように、厚みが脚部２２の突条部２２ａの厚みとほぼ同じ寸法であって、幅が突条部２２ａの高さ（突起８０と突条部２２ａとによって形成される溝８２の底からアンカ部２２ｂの内面までの高さ）とほぼ同じ寸法に形成された帯状体である。
【００７２】
この補強部材７８を使用して更生管を施工するときは、第６実施例と同様に、図１１（Ａ）に示すように、補強部材７８をストリップ１６の脚部２２に装着する。補強部材７８をストリップ１６の脚部２２に装着するときは、補強部材７８の下縁部をストリップ１６に形成されている突起８０と突条部２２ａとの間に形成されている溝８２に係合させて、補強部材７８を脚部２２の突条部２２ａの側面に押し付けて密着させた状態にすればよい。補強部材７８は、突条部２２ａの両方の側面に装着される。このように装着された状態で、図１１（Ａ）に示すように、各補強部材７８が突条部２２ａの各側面に密着しており、各補強部材７８の下縁部が溝８２に嵌め込まれて係合し、各上縁部がアンカ部２２ｂの内面に圧接した状態となり、第６実施例と同様に、補強部材７８とストリップ１６とが結合した状態となる。
【００７３】
次に、図１１（Ｂ）に示すように、補強部材７８が装着されたストリップ１６およびジョイナ１２によって螺旋管１８が形成された状態で、裏込材４４が充填されると、第６実施例と同様に、裏込材４４が固化したときに、この裏込材４４が脚部２２を強力に保持することができる。
【００７４】
補強部材７８のこれ以外の構成および作用は、第６実施例と同等であるので、それらの詳細な説明を省略する。また、補強部材７８を使用する更生管の施工方法も、これ以外は第６実施例と同等であるので、その詳細な説明を省略する。
【００７５】
ただし、第１〜第５実施例では、図３（Ｂ）等に示すように、補強部材１０，６０，６２，６６，７０の左右両側に側壁部４８を形成したが、この左右の側壁部４８のうちのいずれか一方を省略してもよい。このように、側壁部４８の一方を省略しても、補強部材１０等が設置された状態で、ストリップ１６が垂れ下がらないように保持することができる。
【００７６】
そして、第１および第２実施例では、補強部材１０，６０の左右両側の側壁部４８の下縁をかしめて屈曲部４８ａを形成したが、いずれか一方の側壁部４８の下縁をかしめて屈曲部４８ａを形成してもよい。
【００７７】
第４，第５，第６，および第７実施例の補強部材６６，７０，７４，７８の材質は、たとえば鋼等の金属製、または硬質塩化ビニル等の合成樹脂製としてもよい。
【図面の簡単な説明】
【図１】この発明の第１実施例に係る螺旋管の補強部材をストリップの脚部に被せた状態を示す斜視図である。
【図２】（Ａ）は図１の補強部材が装着されるストリップを示す縦断面図、（Ｂ）は図１の補強部材をストリップの脚部に被せた状態を示す縦断面図である。
【図３】（Ａ）は脚部に被せた補強部材をかしめた状態を示す縦断面図、（Ｂ）は図３（Ａ）のストリップに装着された補強部材の使用状態を示す縦断面図である。
【図４】設置された螺旋管のジョイナとストリップとの接合状態を示す拡大縦断面図である。
【図５】図３（Ａ）の補強部材が装着されたストリップを使用して下水管の内面に螺旋管を形成した状態を示す縦断面図である。
【図６】（Ａ）はこの発明の第２実施例に係る螺旋管の補強部材をストリップの脚部に被せた状態を示す縦断面図、（Ｂ）は図６（Ａ）の脚部に被せた補強部材をかしめた状態を示す縦断面図、（Ｃ）は図６（Ｂ）のストリップに装着された補強部材の使用状態を示す縦断面図である。
【図７】（Ａ）はこの発明の第３実施例に係る螺旋管の補強部材をストリップの脚部に被せた状態を示す縦断面図、（Ｂ）は図７（Ａ）の脚部に被せた補強部材をかしめた状態を示す縦断面図、（Ｃ）は図７（Ｂ）のストリップに装着された補強部材の使用状態を示す縦断面図である。
【図８】この発明の第４実施例に係る螺旋管の補強部材の使用状態を示す縦断面図である。
【図９】この発明の第５実施例に係る螺旋管の補強部材の使用状態を示す縦断面図である。
【図１０】（Ａ）はこの発明の第６実施例に係る螺旋管の補強部材をストリップの脚部に装着した状態を示す斜視図、（Ｂ）は図１０（Ａ）のストリップに装着された補強部材の使用状態を示す縦断面図である。
【図１１】（Ａ）はこの発明の第７実施例に係る螺旋管の補強部材をストリップの脚部に装着した状態を示す斜視図、（Ｂ）は図１１（Ａ）のストリップに装着された補強部材の使用状態を示す縦断面図である。
【図１２】従来の補強部材が装着されたストリップの使用状態を示す縦断面図である。
【図１３】従来の他の補強部材が装着されたストリップの使用状態を示す縦断面図である。
【図１４】従来のさらに他の補強部材が装着されたストリップの使用状態を示す縦断面図である。
【図１５】従来のさらに他の補強部材が装着されたストリップの使用状態を示す縦断面図である。
【符号の説明】
１０，６０，６２，６６，７０，７４，７８ …補強部材
１２ …ジョイナ
１４ …下水管
１６ …ストリップ
１８ …螺旋管
２０，３４ …本体
２２，３２ …脚部
２２ａ …突条部
２２ｂ …アンカ部
２４ …条溝
２６ …第１壁
２８ …第２壁
３６，４２ …突条
３８ …挟持部
４４ …裏込材
４６ …底部
４８ …側壁部
４８ａ …屈曲部
５２，５４ …空間
６４ …突条
６８，７２ …係合部
７６，８２ …溝
８０ …突起[0001]
[Industrial application fields]
The present invention relates to a reinforcing member for a helical tube and a method for constructing a rehabilitating pipe using the same, and particularly, for example, reinforcing a helical tube formed by spirally winding a strip along the inner surface of an aged sewer pipe. The present invention relates to a member and a method for constructing a rehabilitation pipe using the member.
[0002]
[Prior art]
Examples of this type of reinforcing member are Japanese Patent Publication No. Hei 6-511071 (F16L 11/16) (first reinforcing member), Japanese Patent Publication No. 7-80238 (B29C 53/78) (second reinforcing member), and Japanese Examined Patent Publication No. 7-62508 (F16L 11/16) (third and fourth reinforcing members).
[0003]
As shown in FIG. 12, the strip-shaped strip 2 to which the first reinforcing member 1 is attached is, for example, for rehabilitating an aged sewer pipe 3 and is spirally formed along the inner surface 3 a of the sewer pipe 3. It is installed by wrapping around. Thus, the purpose of installing the first reinforcing member 1 on the spiral tube 4 formed of the strip 2 is to prevent the ceiling portion of the spiral tube 4 from drooping due to its own weight when the spiral tube 4 is formed. , And in a state before the backing material 8 filled between the sewage pipe 3 and the spiral tube 4 is solidified, the spiral tube 4 is prevented from being deformed by pressure based on the weight of the backing material 8 or the like. It is. That is, as the inner diameter of the sewage pipe 3 increases, the diameter of the spiral pipe 4 also increases and the ceiling portion is liable to hang down. Therefore, it is necessary to increase the rigidity of the spiral pipe 4 by attaching the first reinforcing member 1.
[0004]
A plurality of protrusions 5 are formed on the strip 2 in parallel with each other. Each protrusion 5 has a T-shaped cross section and is formed in the longitudinal direction of the strip 2.
[0005]
As shown in FIG. 12, the first reinforcing member 1 is a long material having a W-shaped cross section, and is attached between the protrusions 5. The 1st reinforcement member 1 is engaging with the inner surface of the hook-shaped part 5a of each processus | protrusion 5 in which each right-and-left side edge corresponds. Thereby, the first reinforcing member 1 and the strip 2 are coupled to each other, and the rigidity of the spiral tube 4 can be increased.
[0006]
As shown in FIG. 13 and FIG. 14, the second and third reinforcing members 6 and 7 are trapezoidal and semicircular long members whose cross-sectional shape opens upward, and are the same as the first reinforcing member 1. Each of the left and right side edges engages with the inner surface of the hook-shaped portion 5a of the corresponding projection 5, and the rigidity of the spiral tube 4 can be increased.
[0007]
As shown in FIG. 15, the fourth reinforcing member 9 is a tubular body in which a kerf is formed in the tube wall along the tube axis direction. The fourth reinforcing member 9 is fitted and attached to each protrusion 5 b formed on the strip 2. In this attached state, the fourth reinforcing member 9 covers the entire surface of the protrusion 5 b, and the lower edge of the fourth reinforcing member 9 is in close contact with the strip-like portion 2 c of the strip 2.
[0008]
Further, when the sewage pipe 3 is rehabilitated by using the first to fourth reinforcing members 1, 6, 7, and 9, for example, first, the joint portions at both side edges of the strip 2 while spirally winding the strip 2 are used. 2a is joined and the spiral tube 4 is formed. After that, the reinforcing member 1 or the like is attached to the spiral tube 4. Next, the spiral tube 4 to which the reinforcing member 1 and the like are attached is installed on the inner surface 3 a of the sewage pipe 3. Then, a backing material 8 is filled between the inner surface 3 a of the sewage pipe 3 and the spiral pipe 4.
[0009]
[Problems to be solved by the invention]
However, in the first to third reinforcing members 1 etc., a spiral closed space 2 b is formed between each reinforcing member 1 etc. and the strip-like portion of the strip 2. There is a problem that the material 8 cannot be filled. As described above, if there is a portion that is not filled with the backing material 8, the portion of the spiral tube 4 may be depressed when a pressing force is applied to the portion from the inside. When such a depression is formed on the bottom surface of the spiral tube 4, there is a problem that sewage accumulates.
[0010]
Moreover, since the 4th reinforcement member 9 is attached for every protrusion 5b, the closed space 2b cannot be made like the 1st-3rd reinforcement member 1 grade | etc., But when the backing material 8 solidifies, There is a problem that the holding force of the protrusion 5b (strip 2) by the backing material 8 is small. This is because the protrusion 5 b is not in contact with the backing material 8 and is not directly held by the backing material 8 but is directly held by the reinforcing member 9. Therefore, there is a problem that the spiral tube 4 cannot be reinforced strongly by the backing material 8.
[0011]
By the way, it is conceivable to increase the holding force of the protrusion 5b by the reinforcing member 9 by changing the material and shape of the reinforcing member 9 and the protrusion 5b. In this case, when the reinforcing member 9 is attached to the protrusion 5b. In addition, a large force is required and there is a problem that workability is lowered.
[0012]
Furthermore, in the rehabilitation pipe construction method using the first to fourth reinforcement members 1 and the like, first, after forming the spiral tube 4 with the strip 2, the reinforcement member is formed on the outer peripheral surface of the three-dimensionally shaped spiral tube 4. Since 1 etc. are mounted | worn, it becomes a difficult operation | work of mounting | wearing with the reinforcement member 1 grade | etc.,. Therefore, there is a problem that it takes a long time to work at the construction site.
[0013]
Therefore, the main object of the present invention is to provide a reinforcing member for the helical tube, which can strongly reinforce the helical tube and can fill the entire space between the inner surface of the sewage pipe and the helical tube with a backing material. It is to provide a rehabilitation pipe construction method using it.
[0015]
[Means for Solving the Problems]
  First1According to the present invention, there is provided a strip including a strip-shaped portion that forms an inner surface of a spiral tube, and a rib that extends in a longitudinal direction on one surface of the strip-shaped portion and has an anchor portion at a tip of a protruding portion. In order to reinforce a spiral tube formed by being spirally wound along a strip, a reinforcing member attached to each strip of ribs, the strip-shaped bottom portion being disposed along the outer surface of the anchor portion, the anchor A pair of side wall portions formed extending from the bottom portion with an interval of approximately the same size as the width of the portion, and an engagement portion formed on the side wall portion and engaged with the anchor portion, It is a reinforcing member for a helical tube in which the side wall portion, the belt-like portion, and the protruding portion are arranged with a space therebetween in a state of being engaged with the anchor portion and form a space portion filled with the backing material.
[0016]
  First2According to the present invention, a strip-shaped portion that forms the inner surface of the spiral tube, a rib that extends in the longitudinal direction on one surface of the strip-shaped portion, and has an anchor portion at the tip of the ridge, and a base end portion of the rib In order to reinforce the spiral tube formed by spirally winding the strip including the groove portion formed along the inner surface of the tube, the reinforcing member is attached to each of the strip ribs, The spiral tube is a band-shaped body having a width substantially the same as the height of the ridge, and is attached to the rib in a state where the edge is engaged with the groove and is in close contact with at least one side surface of the ridge. It is a reinforcing member.
[0017]
  First3The invention ofA strip that forms the inner surface of the spiral tube, andOne sideLongFormed to extend in the hand directionAnd a rib having an anchor portion at the tip of the ridge portion.Strip,In the construction method of the rehabilitation pipe that is spirally wound along the inner surface of the pipe, (a)A pair of side walls that are formed to extend from the bottom portion with a gap that is approximately the same size as the width of the anchor portion, and whose length in the direction perpendicular to the bottom portion is larger than the thickness of the anchor portion and smaller than the height of the rib. Prepare a reinforcing member with a part, (b)Put the reinforcing member on the rib,(c) The reinforcing member is plastically deformed and engaged with the rib so that the side wall portion of the reinforcing member and the rib-like portion and the protruding portion of the rib are spaced apart,(d)Winding the strip spirally along the inner surface of the tube to join the ends of adjacent strips, and(e) There is a method for constructing a rehabilitated pipe using a reinforcing member, characterized in that a backing material is filled between the inner surface of the pipe and the strip.
[0018]
  First4The invention of claim 1 is a method for constructing a rehabilitating pipe in which a strip-like strip formed with ribs extending in the longitudinal direction on one side is spirally wound along the inner surface of the pipe. A reinforcing member according to any one of the above is attached to the rib, (b) the strip is spirally wound along the inner surface of the pipe to join the ends of the adjacent strips, and (c) the pipe A rehabilitating pipe construction method using a reinforcing member, characterized in that a backing material is filled between an inner surface and a strip.
[0019]
[Action]
  According to the reinforcing member of the spiral tube of the first invention,When the reinforcing member is attached to the rib of the strip, the engaging portion formed on the side wall may be engaged with the anchor portion of the rib. For example,The reinforcing member can be engaged with the rib by covering the reinforcing member with the anchor portion of the rib and plastically deforming the side wall portion. Thereby, the reinforcing member can be attached to the strip.
[0020]
When the spiral tube is formed using the strip to which the reinforcing member is attached, the reinforcing member is restrained from being displaced relative to the anchor portion in the longitudinal direction by the engagement between the side wall portion and the anchor portion. Therefore, the spiral tube can be firmly reinforced by the reinforcing member. That is, according to this reinforcing member, when the spiral tube is formed, the ceiling portion of the spiral tube can be prevented from sagging due to its own weight. And in the state before the backing material with which it filled between the sewer pipe and the spiral tube solidified, it can prevent that a spiral tube deform | transforms with the pressure based on the weight etc. of a backing material.
[0021]
Further, according to the reinforcing member attached to the strip, the reinforcing member is attached to each rib, so that it is possible to prevent a closed space from being formed between the reinforcing member and the strip. Therefore, when the backing material is filled in the space between the spiral tube formed by the strip and the inner surface of the pipe (sewage pipe or the like), the backing material can be spread to every corner of the space.
[0022]
Further, in a state where the reinforcing member is plastically deformed and attached to the rib, the reinforcing member and the strip-shaped body of the strip are arranged at a distance from each other. Thereby, when the backing material is filled in the space portion formed between the two, the backing material can be in close contact with the portion not covered by the reinforcing member of the rib. Therefore, when the backing material is solidified, the rib can be strongly held by this backing material.
[0024]
  First2According to the reinforcing member of the spiral tube of the present invention, when the reinforcing member is attached to the rib of the strip, the reinforcing member is formed on the strip.GrooveAnd may be arranged along the side surface of the rib protrusion. When the backing material is filled with the reinforcing member attached to the rib in this manner, the backing material can come into contact with the anchor portion formed on the rib. Therefore, when the backing material is solidified, the backing material strongly holds the rib. Except for this, the operation is the same as that of the first invention, and the description thereof is omitted.
[0025]
  First3And second4According to the method of constructing the rehabilitation pipe using the reinforcing member of the present invention, the first pipe is formed before the spiral pipe is formed using the strip.Or secondA corresponding reinforcing member of the invention is attached to the strip. Thereafter, a spiral tube is formed using a strip to which a reinforcing member is attached.
[0026]
【The invention's effect】
According to the reinforcing member of the spiral tube of the present invention, when the backing material filled between the inner surface of the pipe (such as a sewer pipe) and the spiral tube is solidified, the backing material is in direct contact with the rib. A strong rehabilitation pipe can be formed because the rib is held strongly. In other words, even when an external force is applied to the strip due to, for example, earthquake motion, the strip can be reliably prevented from drooping or turning.
[0027]
  AndAccording to the rehabilitation pipe construction method using the reinforcing member of the third invention,Unlike the conventional case, there is no need to elastically deform the reinforcing member and attach it to the rib, and it is only necessary to cover the anchor member on the anchor portion. Therefore, the reinforcing member can be easily attached to the rib with a small force. In order to prevent the reinforcing member from being detached from the rib, the reinforcing member needs to be plastically deformed and engaged with the rib, but this operation can be performed using a jig (jig) or the like. , The burden on the operator can be reduced.
[0028]
  3rd and 4thAccording to the construction method of the rehabilitated pipe using the reinforcing member of the invention of the first,Or secondSince the pipes are rehabilitated using the corresponding reinforcing members of the invention, rehabilitated pipes having the effects of the respective reinforcing members can be formed.
[0029]
The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.
[0030]
【Example】
FIG. 1 to FIG. 5 show a first embodiment of a helical tube reinforcing member (hereinafter sometimes simply referred to as “reinforcing member”) and a rehabilitating pipe construction method using this reinforcing member. To explain. The strip 16 to which the reinforcing member 10 is attached has a spiral shape along the inner surface 14a of the sewer pipe 14 in order to rehabilitate the old sewer pipe 14 or to protect the inner surface 14a of the new sewer pipe 14, for example. Are joined together by joiners 12 to form a spiral tube (inner tube) 18. In this embodiment, the sewage pipe 14 is a fume pipe. Of course, the present invention can be applied to a sewer pipe other than the fume pipe, for example, a synthetic resin pipe or a metal pipe. FIG. 5 is a schematic cross-sectional view of the sewage pipe 14 rehabilitated by the spiral pipe 18 using the reinforcing member 10.
[0031]
The strip 16 is continuously formed by extrusion molding of a synthetic resin such as hard vinyl chloride, and includes a strip-shaped main body (strip-shaped portion) 20 shown in FIG. On one surface of the main body 20, ribs having a substantially T-shaped cross section projecting toward the inner surface of the sewer pipe 14 are formed as the leg portions 22. The leg portion 22 includes a strip-shaped ridge portion 22a formed extending in the longitudinal direction of the main body 20, and an anchor portion 22b formed at the tip of the ridge portion 22a. The anchor portion 22b is parallel to the main body 20, and the center portion thereof is coupled to the protruding portion 22a. The legs 22 are for engaging the backing material 44 filled between the sewer pipe 14 and the strip 16 so that the strip 16 is difficult to come off from the backing material 44. In addition, grooves 24 and 24 are formed on both side edges of the main body 20 in the width direction. Each groove 24 is formed by a first wall 26 close to the main body 20 and a second wall 28 far from the main body 20. On the inner surface of the second wall 28, as shown in FIG. 30 and 30 are continuously formed along the groove 24. In addition, a rib having a substantially T-shaped cross section that protrudes toward the inner surface of the sewer pipe 14 is formed as a leg portion 32 at the bottom of each groove 24. The leg portion 22, the groove 24, the first wall 26, the second wall 28, the protrusion 30, and the leg portion 32 are formed along the entire length of the main body 20.
[0032]
The joiner 12 includes a band-shaped main body 34 continuously formed by extrusion molding of a hard synthetic resin such as hard vinyl chloride. As shown in FIG. 4, a protrusion 36 fitted in the groove 24 of the strip 16 and a holding part 38 are formed on the outer surfaces of both ends in the width direction of the main body 34. The protrusions 36 and the sandwiching portions 38 cooperate with each other to sandwich the second wall 28 of the strip 16. The clamping part 38 is bent, and the bent part is engaged with the second wall 28 via a protrusion. The protrusion 36 is formed with a protrusion 40 having a substantially sawtooth cross section that is engaged with the protrusion 30 formed on the second wall 28. The protrusions 36, the sandwiching portions 38, and the protrusions 40 are continuously formed along the longitudinal direction of the main body 34. Further, two anchor portions 42 formed as ridges are provided at predetermined positions at positions near the center of the outer surface of the main body 34. The anchor portion 42 is for engaging the backing material 44 filled between the sewer pipe 14 and the joiner 12 so that the joiner 12 is not easily detached from the strip 16 and the backing material 44. The strip 16 and the joiner 12 are formed symmetrically as shown in FIG.
[0033]
The reinforcing member 10 is made of a metal such as steel and is a long object. The reinforcing member 10 is used by being attached to the strip 16 as shown in FIG. 3B, and includes a bottom 46 and a side wall 48 as shown in FIG.
[0034]
The reinforcing member 10 is formed by, for example, forming a band-like body having a predetermined width and thickness by bending each edge on both sides in the width direction by about 90 °, and has a U-shaped cross section. The reinforcing member 10 includes left and right side wall portions 48 formed by bending, and a bottom portion 46 formed between the side wall portions 48. The width of the bottom portion 46 is slightly larger than the width of the anchor portion 22 b, and is a dimension that can be mounted inside the left and right side wall portions 48 with the anchor portion 22 b being along the inner surface of the bottom portion 46. And the length of the orthogonal direction with respect to the bottom part 46 of each side wall part 48 is a dimension a little longer than the thickness of the width direction edge part of the anchor part 22b.
[0035]
As shown in FIG. 3, the reinforcing member 10 is formed by bending the lower edges of the left and right side wall portions 48 toward the inside by about 45 ° in a state of covering the anchor portions 22 b of the leg portions 22. Can be attached to. Thus, in a state where the lower edge of each side wall portion 48 is bent, the inner surface of the bent portion 48a presses the lower edge of each edge portion on both sides of the anchor portion 22b. The lower edge of each side wall 48 for forming each bent portion 48a is bent by plastic deformation such as caulking. Plastic deformation is performed, for example, with a jig or the like.
[0036]
In this way, the lower edges of the side wall portions 48 on both sides are bent, as shown in FIG. This is to make it difficult to turn off the reinforcing member 10. The bent portions 48 a formed on the reinforcing member 10 are formed at certain intervals along the longitudinal direction of the reinforcing member 10. The interval for forming the bent portion 48 a is defined so that the reinforcing member 10 can securely hold the strip 16.
[0037]
Next, a procedure for forming the spiral pipe 18 on the inner surface 14a of the sewage pipe 14, that is, a rehabilitation pipe construction method using the reinforcing member 10 will be described with reference to the drawings. First, the reinforcing member 10 shown in FIG. 1 and the strip 16 shown in FIG. 2 (A) are prepared. Then, as shown in FIG. 2 (B), the reinforcing member 10 is put on each of the leg portions 22 and 32 (hereinafter referred to as the leg portions 22) formed on the strip 16. As described above, the reinforcing member 10 is placed on each leg 22, and is not placed on two or more legs 22. The reinforcing member 10 is covered every other strip on the plurality of leg portions 22 formed on the strip 16. Of course, the reinforcing member 10 may be covered every two lines, or all the leg portions 22 may be covered. In short, an appropriate number of reinforcing members 10 may be used so that the helical tube 18 can be appropriately reinforced depending on the strength of the strip 16 itself and the diameter of the helical tube 18.
[0038]
Next, as shown in FIG. 3A, the lower edges of the left and right side wall portions 48 of the reinforcing member 10 placed on the leg portion 22 are plastically deformed and bent using a jig or the like. Thereby, the bent portion 48a is formed. The bent portions 48 a are formed at certain intervals along the longitudinal direction of the reinforcing member 10. As a result, the inner surface of each bent portion 48a is brought into a state of pressing and engaging the lower edge of each edge portion on both sides of the anchor portion 22b, and the reinforcing member 10 and the strip 16 are coupled to each other. In this state, the inner surface of the bottom portion 46 is in close contact with the outer surface of the anchor portion 22b. Thereby, the reinforcing member 10 is fixed to the leg portion 22 of the strip 16 so as not to be displaced in the vertical direction and the left-right direction in FIG. 3A, and the reinforcing member 10 is fixed to the anchor portion 22 b of the strip 16. It is fixed to the strip 16 in a state in which the relative displacement in the longitudinal direction is constrained.
[0039]
However, the reinforcing member 10 is attached to the strip 16 before the strip 16 and the joiner 12 are spirally wound to form the spiral tube 18. For example, in a factory or a construction site, the reinforcing member 10 is previously attached to the strip 16 as shown in FIG.
[0040]
Thereafter, as shown in FIG. 3B, the strip 16 to which the reinforcing member 10 is attached is spirally wound along the inner surface 14a of the sewer pipe 14, and the edges in the width direction of the strip 16 are joined to each other. 12 are joined to form a helical tube 18. Next, the backing material 44 is filled between the inner surface 14 a of the sewer pipe 14 and the spiral pipe 18. This completes the construction of the rehabilitation pipe using the strip 16 to which the reinforcing member 10 is attached.
[0041]
The backing material 44 is a mortar such as cement milk. This mortar has good fluidity and is blended with additives so as to solidify in a relatively short time. The leg portions 22 and 32 and the anchor portion 42 formed on the strip 16 and the joiner 12 are embedded in the backing material 44. After the backing material 44 is cured, the leg portion 22 and the anchor portion 42 are It is firmly fixed to the backing material 44. When joining the strip 16 and the joiner 12, the pair of protrusions 36 of the joiner 12 are fitted into the pair of grooves 24 of the strip 16. As a result, the side edges in the width direction of the strip 16 can be joined by the joiner 12.
[0042]
According to the reinforcing member 10 of the first embodiment shown in FIG. 1, there is no need to elastically deform the reinforcing member 10 and attach it to the leg portion 22 as in the prior art, and the anchor portion formed on the leg portion 22. Since it only needs to cover 22b, the reinforcing member 10 can be easily attached to the leg portion 22 with a small force. In order to prevent the reinforcing member 10 from being detached from the leg portion 22, the side wall portion 48 of the reinforcing member 10 is plastically deformed to form a bent portion 48 a and the bent portion 48 a is engaged with the leg portion 22. Although it is necessary, since this operation can be performed using a jig, a tool, or the like, the burden on the operator can be reduced.
[0043]
When the spiral tube 18 is formed using the strip 16 to which the reinforcing member 10 is attached, the reinforcing member 10 is displaced relative to the anchor portion 22b in the longitudinal direction by the engagement between the side wall portion 48 and the anchor portion 22b. Is restrained. Therefore, the spiral tube 18 can be firmly reinforced by the reinforcing member 10 in a state where the spiral tube 18 is installed on the inner surface 14 a of the sewer pipe 14. That is, in the state where the backing material 44 is not solidified, the spiral tube 18 cannot be held by the backing material 44, but the spiral tube 18 can be held by the reinforcing member 10. Therefore, in both the state in which the backing material 44 is not solidified and the state in which it is solidified, it is possible to reliably prevent the strip 16 from drooping or turning over, for example, the ceiling portion and further deforming. Of course, according to the reinforcing member 10, when the spiral tube 18 is formed, the ceiling portion of the spiral tube 18 can be prevented from sagging due to its own weight.
[0044]
Further, according to the reinforcing member 10 attached to the strip 16, the reinforcing member 10 is attached to each of the legs 22, so that the reinforcing member 10, the strip 16, and the reinforcing member 10 are attached to the strip 16. It is possible to prevent a closed space from being formed between them. Therefore, as shown in FIG. 3B, when the backing material 44 is filled into the space 52 or the like between the spiral pipe 18 formed by the strip 16 and the joiner 12 and the inner surface 14a of the sewer pipe 14, The insert 44 can be spread to every corner of the space 52 and the like.
[0045]
Thus, since the rehabilitation pipe | tube of sufficient intensity | strength can be formed, even when a pressing force is applied to the part of the strip 16 from the inside, the part will not be depressed. As a result, sewage does not accumulate on the bottom surface of the spiral tube 18. Of course, even when a pressing force is applied to the part of the joiner 12, no dent is formed, so that no sewage is collected.
[0046]
Further, the reinforcing member 10 and the main body 20 of the strip 16 are arranged at a distance from each other in a state where the reinforcing member 10 is plastically deformed and attached to the leg portion 22. As a result, the space 54 formed between the two is filled with the backing material 44, and the backing material 44 is in direct contact with the inner surfaces of the protrusions 22 a and the anchor portions 22 b of the legs 22 to strengthen the legs 22. Therefore, a strong rehabilitation tube can be formed. That is, even when an external force is applied to the strip 16 due to, for example, an earthquake motion, the strip 16 can be reliably prevented from hanging or turning.
[0047]
And according to the construction method of the rehabilitation pipe | tube using this reinforcement member 10, before forming the helical tube 18 using the strip 16 and the joiner 12, the reinforcement member 10 is engaged with the strip 16 and attached. Compared with the case where the reinforcing member 10 is mounted on the outer peripheral surface of the three-dimensional spiral tube 18, the reinforcing member 10 can be easily mounted on the strip 16. Therefore, the work time at the construction site can be shortened compared to the conventional method, and the labor can be reduced. Of course, by attaching the reinforcing member 10 to the strip 16 at the factory, the working time at the construction site can be shortened accordingly, and the labor can be reduced.
[0048]
Next, a second embodiment of the reinforcing member according to the present invention and a rehabilitating pipe construction method using the reinforcing member will be described with reference to FIG.
[0049]
The difference between the reinforcing member 10 of the first embodiment shown in FIG. 1 and the reinforcing member 60 of the second embodiment shown in FIG. 6 is that the left and right side wall portions 48 formed on the reinforcing members 10 and 60 are different. The dimension in the direction perpendicular to the bottom 46 is longer in the second embodiment than in the first embodiment, and the length of the bent portion 48a is longer in the second embodiment than in the first embodiment. It ’s a long time.
[0050]
Thus, the reinforcing member 60 is formed so that the dimension in the direction orthogonal to the bottom 46 of each of the left and right side wall portions 48 is longer than that of the first embodiment. Therefore, as shown in FIG. In the state of being spirally installed in 14, the second moment of section can be made larger than in the first embodiment. Therefore, the reinforcing member 60 of the second embodiment can reinforce the helical tube 18 more strongly than the reinforcing member of the first embodiment, and can form a strong rehabilitation tube. Since other configurations and operations are the same as those of the first embodiment, their detailed description is omitted.
[0051]
The procedure for forming the spiral tube 18 on the inner surface 14a of the sewage pipe 14, that is, the method for constructing the rehabilitation pipe using the reinforcing member 60 is the same as in the first embodiment. That is, first, as shown in FIG. 6A, the reinforcing member 60 is put on the predetermined leg portion 22. Then, as shown in FIG. 6B, the left and right side wall portions 48 of the reinforcing member 60 are plastically deformed inward by a predetermined angle and engaged with the anchor portion 22b. Next, as shown in FIG. 6C, the spiral pipe 18 is formed inside the sewer pipe 14 using the strip 16 and the joiner 12 to which the reinforcing member 60 is attached, and the inner surface 14 a of the sewer pipe 14. The space 52 between the pipe 18 and the spiral tube 18 is filled with the backing material 44. This completes the construction of the rehabilitation pipe.
[0052]
Next, a third embodiment of the reinforcing member according to the present invention and a rehabilitation pipe construction method using the reinforcing member will be described with reference to FIG.
[0053]
The difference between the reinforcing member 10 of the first embodiment shown in FIG. 1 and the reinforcing member 62 of the third embodiment shown in FIG. 7 is that the bottom 46 of the first embodiment is a flat belt-like body. In the third embodiment, the bottom 46 is formed with a protrusion 64 projecting outward in the center along the longitudinal direction. The protrusion 64 has a substantially semicircular cross-sectional shape and is formed by bending the bottom 46.
[0054]
Thus, since the reinforcing member 62 has the protrusions 64 formed on the bottom 46, as shown in FIG. 7C, the second moment of cross section is provided in a state of being spirally installed in the sewer pipe 14. Can be made larger than in the first embodiment. Therefore, the reinforcing member 62 of the third embodiment can reinforce the helical tube 18 more strongly than the reinforcing member 10 of the first embodiment, and can form a strong rehabilitation tube. Since the other configuration and operation of the reinforcing member 62 are the same as those of the first embodiment, their detailed description is omitted. Moreover, since the construction method of the rehabilitation pipe | tube which uses the reinforcement member 62 is equivalent to 1st Example, as shown in FIG. 7, the detailed description is abbreviate | omitted.
[0055]
Next, a fourth embodiment of the reinforcing member according to the present invention and a rehabilitation pipe construction method using the reinforcing member will be described with reference to FIG.
[0056]
The difference between the reinforcing member 10 of the first embodiment shown in FIG. 1 and the reinforcing member 66 of the fourth embodiment shown in FIG. 8 is that the reinforcing member 10 is placed on the leg portion 22 in the first embodiment. The lower edges of the left and right side wall portions 48 are bent (plastically deformed) to form a bent portion 48a, and the bent portion 48a is engaged with the anchor portion 22b of the leg portion 22. In the embodiment, the engaging portion 68 is formed inside the lower edge of each of the left and right side wall portions 48, and this engaging portion 68 is engaged with the lower edge of the width direction edge portion of the anchor portion 22b. The engaging portion 68 is a protrusion (claw) having a substantially right-angled cross-sectional shape, a surface that contacts the lower edge of the anchor portion 22b is parallel to the main body 20 of the strip 16, and the reinforcing member 66 is an anchor portion. It is hard to come off 22b. In order to make it easier to attach the reinforcing member 66 to the anchor portion 22b, the inner surface of the engaging portion 68 is formed so as to spread outward.
[0057]
When a rehabilitation pipe is constructed using the reinforcing member 66, the reinforcing member 66 may be pushed over the anchor portion 22b of the predetermined leg portion 22 of the strip 16. Thus, by pushing the reinforcing member 66 into the anchor portion 22b, the left and right side wall portions 48 are elastically deformed and opened outward, and the reinforcing member 66 is attached to the anchor portion 22b. In this mounted state, as shown in FIG. 8, each engaging portion 68 formed on each side wall portion 48 of the reinforcing member 66 is engaged with the lower edge of the widthwise edge portion of the anchor portion 22b. Thus, similarly to the first embodiment, the reinforcing member 66 and the strip 16 are coupled.
[0058]
Since the other configuration and operation of the reinforcing member 66 are the same as those of the first embodiment, their detailed description is omitted. Moreover, since the construction method of the rehabilitation pipe | tube which uses the reinforcement member 66 is equivalent to 1st Example except this, the detailed description is abbreviate | omitted.
[0059]
Next, a fifth embodiment of a reinforcing member according to the present invention and a method for constructing a rehabilitated pipe using the reinforcing member will be described with reference to FIG.
[0060]
The difference between the reinforcing member 66 of the fourth embodiment shown in FIG. 8 and the reinforcing member 70 of the fifth embodiment shown in FIG. 9 is that the shapes of the engaging portions 68 and 72 are different. As shown in FIG. 9, the engaging portion 72 of the fifth embodiment is formed by bending the left and right side wall portions 48 into a waveform (substantially S-shaped). That is, each of the left and right side wall portions 48 is formed as a curved portion in which an upper portion near the width direction edge portion of the bottom portion 46 protrudes outward, and a lower portion (tip portion) is formed as a curved portion protruding inward. The curved portion formed in the lower portion is the engaging portion 72. The engaging portion 72 is formed so that the inner surface of the engaging portion 72 extends outwardly downward so that the reinforcing member 70 can be easily attached to the anchor portion 22b.
[0061]
When a rehabilitation pipe is constructed using this reinforcing member 70, the reinforcing member 70 may be first pushed over the anchor portion 22b of the predetermined leg portion 22 of the strip 16, as in the fourth embodiment. Thus, in the mounted state, as shown in FIG. 9, each engaging portion 72 of the reinforcing member 70 is engaged with the lower edge of the widthwise edge portion of the anchor portion 22b. Similarly, the reinforcing member 70 and the strip 16 are coupled.
[0062]
Since the other configuration and operation of the reinforcing member 70 are the same as those of the fourth embodiment, their detailed description is omitted. Moreover, since the construction method of the rehabilitation pipe | tube which uses the reinforcement member 70 is equivalent to a 4th Example, the detailed description is abbreviate | omitted.
[0063]
Next, a description will be given of a sixth embodiment of the reinforcing member according to the present invention and a rehabilitation pipe construction method using the reinforcing member with reference to FIG.
[0064]
The strip 16 shown in FIG. 10 to which the reinforcing member 74 of the sixth embodiment is attached has grooves 76 on both sides along the base end portion of each leg portion 22 formed in the strip 16 shown in FIG. Formed.
[0065]
As shown in FIG. 10, the reinforcing member 74 has a thickness that is substantially the same as the thickness of the protruding portion 22a of the leg portion 22, and a width that is the height of the protruding portion 22a (from the bottom of the groove 76 to the anchor portion 22b). It is a belt-like body formed to have substantially the same dimensions as the height to the inner surface.
[0066]
When using this reinforcing member 74 to construct a rehabilitating pipe, as in the fourth embodiment, first, the reinforcing member 74 and the strip 16 are prepared, and as shown in FIG. 74 is attached to the leg 22 of the strip 16. When the reinforcing member 74 is attached to the leg portion 22 of the strip 16, the lower edge portion of the reinforcing member 74 is engaged with the groove 76 formed in the strip 16, so that the reinforcing member 74 is connected to the protruding portion of the leg portion 22. What is necessary is just to make it the state which pressed on the side surface of 22a and was stuck. The reinforcing member 74 is mounted on both side surfaces of the protruding portion 22a. Of course, you may mount | wear on either one side surface of the protrusion part 22a. In a state where the reinforcing member 74 is mounted in this manner, as shown in FIG. 10A, each reinforcing member 74 is in close contact with each side surface of the protrusion 22a, and the lower edge portion of each reinforcing member 74 is The upper edge portion is brought into pressure contact with the inner surface of the anchor portion 22b by being fitted into the groove 76, and the reinforcing member 74 and the strip 16 are joined together as in the above embodiments.
[0067]
Next, as shown in FIG. 10B, when the backing material 44 is filled in a state where the spiral tube 18 is formed by the strip 16 and the joiner 12 to which the reinforcing member 76 is attached, the backing material 44 is filled. Can be brought into close contact with the inner surface and the side surface of the anchor portion 22b formed on the leg portion 22. Therefore, when the backing material 44 is solidified, the backing material 44 can strongly hold the leg portion 22.
[0068]
Since the other configuration and operation of the reinforcing member 76 are the same as those of the fourth embodiment, their detailed description is omitted. Moreover, since the construction method of the rehabilitation pipe | tube which uses the reinforcement member 76 is the same as that of 4th Example except this, the detailed description is abbreviate | omitted.
[0069]
Next, a seventh embodiment of a reinforcing member according to the present invention and a rehabilitating pipe construction method using the reinforcing member will be described with reference to FIG.
[0070]
The strip 16 shown in FIG. 11 to which the reinforcing member 78 of the seventh embodiment is attached is formed along the base end portion of each leg portion 22 formed on the strip 16 shown in FIG. The projections 80 are formed on both sides thereof.
[0071]
As shown in FIG. 11, the reinforcing member 78 has a thickness that is substantially the same as the thickness of the protruding portion 22a of the leg portion 22, and a width that is the height of the protruding portion 22a (the protrusion 80 and the protruding portion 22a). The height of the groove 82 formed from the bottom of the groove 82 to the inner surface of the anchor portion 22b) is approximately the same size as the belt-shaped body.
[0072]
When a rehabilitation pipe is constructed using this reinforcing member 78, the reinforcing member 78 is attached to the leg portion 22 of the strip 16, as shown in FIG. 11A, as in the sixth embodiment. When the reinforcing member 78 is attached to the leg portion 22 of the strip 16, the lower edge portion of the reinforcing member 78 is engaged with the groove 82 formed between the protrusion 80 formed on the strip 16 and the protruding portion 22a. The reinforcing member 78 may be pressed against the side surface of the protruding portion 22a of the leg portion 22 to be in close contact with each other. The reinforcing member 78 is attached to both side surfaces of the protruding portion 22a. 11A, each reinforcing member 78 is in close contact with each side surface of the ridge portion 22a, and the lower edge portion of each reinforcing member 78 is fitted into the groove 82. Thus, the respective upper edge portions are brought into pressure contact with the inner surface of the anchor portion 22b, and the reinforcing member 78 and the strip 16 are joined together as in the sixth embodiment.
[0073]
Next, as shown in FIG. 11B, when the backing material 44 is filled in the state in which the spiral tube 18 is formed by the strip 16 to which the reinforcing member 78 is attached and the joiner 12, the sixth embodiment will be described. Similarly, when the backing material 44 is solidified, the backing material 44 can strongly hold the legs 22.
[0074]
Since the other configuration and operation of the reinforcing member 78 are the same as those of the sixth embodiment, detailed description thereof will be omitted. Moreover, since the construction method of the rehabilitation pipe | tube which uses the reinforcement member 78 is the same as that of 6th Example except this, the detailed description is abbreviate | omitted.
[0075]
However, in the first to fifth embodiments, as shown in FIG. 3B and the like, the side wall portions 48 are formed on the left and right sides of the reinforcing members 10, 60, 62, 66, 70. Any one of 48 may be omitted. Thus, even if one of the side wall portions 48 is omitted, the strip 16 can be held so as not to hang down with the reinforcing member 10 or the like installed.
[0076]
In the first and second embodiments, the bent edges 48a are formed by caulking the lower edges of the side walls 48 on both the left and right sides of the reinforcing members 10, 60, but the lower edges of either one of the side walls 48 are caulked. The bent portion 48a may be formed.
[0077]
The material of the reinforcing members 66, 70, 74, 78 of the fourth, fifth, sixth, and seventh embodiments may be made of a metal such as steel or a synthetic resin such as hard vinyl chloride.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a reinforcing member of a spiral tube according to a first embodiment of the present invention is put on a leg portion of a strip.
2A is a longitudinal sectional view showing a strip on which the reinforcing member of FIG. 1 is mounted, and FIG. 2B is a longitudinal sectional view showing a state where the reinforcing member of FIG.
3A is a longitudinal sectional view showing a state in which a reinforcing member placed on a leg portion is caulked, and FIG. 3B is a longitudinal sectional view showing a usage state of a reinforcing member mounted on the strip of FIG. 3A. It is.
FIG. 4 is an enlarged vertical cross-sectional view showing a joined state between a joiner and a strip of the installed spiral tube.
FIG. 5 is a longitudinal sectional view showing a state in which a spiral tube is formed on the inner surface of the sewer pipe using the strip on which the reinforcing member of FIG. 3 (A) is mounted.
6A is a longitudinal sectional view showing a state in which a reinforcing member of a spiral tube according to a second embodiment of the present invention is put on a leg portion of a strip, and FIG. 6B is a leg portion of FIG. 6A. FIG. 8C is a longitudinal sectional view showing a state in which the covered reinforcing member is caulked, and FIG. 6C is a longitudinal sectional view showing a usage state of the reinforcing member attached to the strip of FIG. 6B.
7A is a longitudinal sectional view showing a state in which a reinforcing member of a spiral tube according to a third embodiment of the present invention is put on the leg portion of the strip, and FIG. 7B is a leg portion of FIG. 7A. FIG. 8C is a longitudinal sectional view showing a state in which the covered reinforcing member is caulked, and FIG. 8C is a longitudinal sectional view showing a usage state of the reinforcing member attached to the strip of FIG. 7B.
FIG. 8 is a longitudinal sectional view showing a usage state of a reinforcing member for a helical tube according to a fourth embodiment of the present invention.
FIG. 9 is a longitudinal sectional view showing a usage state of a reinforcing member for a helical tube according to a fifth embodiment of the present invention.
10A is a perspective view showing a state in which a reinforcing member of a helical tube according to a sixth embodiment of the present invention is attached to a leg portion of the strip, and FIG. 10B is attached to the strip of FIG. FIG.
11A is a perspective view showing a state in which a reinforcing member of a helical tube according to a seventh embodiment of the present invention is attached to the leg portion of the strip, and FIG. 11B is attached to the strip of FIG. FIG.
FIG. 12 is a longitudinal sectional view showing a use state of a strip on which a conventional reinforcing member is mounted.
FIG. 13 is a longitudinal sectional view showing a use state of a strip on which another conventional reinforcing member is mounted.
FIG. 14 is a longitudinal sectional view showing a use state of a strip on which another conventional reinforcing member is mounted.
FIG. 15 is a longitudinal sectional view showing a use state of a strip on which another conventional reinforcing member is mounted.
[Explanation of symbols]
10, 60, 62, 66, 70, 74, 78 ... reinforcement member
12 ... Joiner
14 ... sewer pipe
16 ... strip
18 ... spiral tube
20, 34 ... body
22, 32 ... Leg
22a ... ridge
22b ... Anchor part
24 ...
26 ... 1st wall
28 ... 2nd wall
36, 42 ... ridge
38 ... clamping part
44 ... Backing material
46 ... Bottom
48 ... side wall
48a ... bent portion
52, 54 ... space
64 ...
68, 72 ... engaging portion
76, 82 ... groove
80 ... projection

Claims

A strip including a strip-shaped portion forming the inner surface of the spiral tube and a rib formed on one surface of the strip-like portion in the longitudinal direction and having an anchor portion at the tip of the ridge portion is provided along the inner surface of the tube. In order to reinforce the spiral tube formed by spirally winding, a reinforcing member attached to each of the ribs of the strip,
A belt-like bottom disposed along the outer surface of the anchor portion;
A pair of side wall portions formed to extend from the bottom portion with an interval of approximately the same size as the width of the anchor portion; and an engaging portion formed on the side wall portion and engaged with the anchor portion. ,
A spiral in which the side wall portion, the belt-like portion, and the ridge portion are arranged with a space therebetween to form a space portion filled with a backing material in a state where the engaging portion is engaged with the anchor portion. Reinforcing member for pipes.

Tip of the side wall portion is embedded in the Urakomi material, according to claim 1 reinforcing member spiral pipe according.

The side wall portion has a shape bent in waveform claim 1 or 2 reinforcing member of the spiral pipe according.

A band-shaped portion that forms the inner surface of the spiral tube, a rib that extends in the longitudinal direction on one surface of the band-shaped portion, and has an anchor portion at the tip of the ridge, and is formed along the base end of the rib A reinforcing member attached to each of the ribs of the strip in order to reinforce the spiral tube formed by spirally winding the strip with the groove portion formed along the inner surface of the tube,
A belt-like body having a width that is approximately the same as the height of the protrusion, and is attached to the rib in a state where a lower edge is engaged with the groove and is in close contact with at least one side surface of the protrusion. A reinforcing member for a helical tube.

A strip portion that forms the inside surface of the spiral tube, formed to extend in the longitudinal side direction on one surface of the strip portion, the strip having a rib having an anchor portion at the distal end of the projection portion, along the inner surface of the tube In the construction method of the rehabilitation pipe wound in a spiral,
(a) a strip-shaped bottom portion, and a rib extending from the bottom portion at an interval substantially equal to the width of the anchor portion, and having a length in a direction perpendicular to the bottom portion larger than the thickness of the anchor portion and the rib Preparing a reinforcing member having a pair of side walls smaller than the height of
(b) covering said reinforcing member to the rib,
(c) The reinforcing member is plastically deformed to be engaged with and attached to the rib so that the side wall portion of the reinforcing member and the rib-like portion and the protruding portion of the rib are in a spaced state,
(d) spirally winding the strip along the inner surface of the tube to join the ends of adjacent strips together; and
(e) A method for constructing a rehabilitated pipe using a reinforcing member, wherein a backing material is filled between the inner surface of the pipe and the strip.

In the construction method of the rehabilitated pipe, in which a strip of strip formed by extending the rib in the longitudinal direction on one side is spirally wound along the inner surface of the pipe,
(a) The reinforcing member according to any one of claims 1 to 4 is attached by being engaged with the rib,
(b) spirally winding the strip along the inner surface of the tube to join the ends of adjacent strips together; and
(c) A method for constructing a rehabilitated pipe using a reinforcing member, wherein a backing material is filled between the inner surface of the pipe and the strip.