JP3676673B2

JP3676673B2 - Synthetic resin spear-type joint

Info

Publication number: JP3676673B2
Application number: JP2000385521A
Authority: JP
Inventors: 浩司太田
Original assignee: Aron Kasei Co Ltd
Current assignee: Aron Kasei Co Ltd
Priority date: 2000-12-19
Filing date: 2000-12-19
Publication date: 2005-07-27
Anticipated expiration: 2020-12-19
Also published as: JP2002181260A

Description

【０００１】
【発明の属する技術分野】
本発明は、合成樹脂製ヤリトリ型接合部材、特に、排水設備用合成樹脂製ヤリトリ型接合部材に関するものである。
【０００２】
【従来の技術】
一般に、排水設備に用いる合成樹脂製（塩ビ製）ヤリトリ型接合部材（スライド継手、ヤリトリソケットともいう）とは、上流側および下流側の各設備が固定状態にあるとき、両設備を水平管で接続するのに用いられるもの、とされている（例えば、実開昭６０−３６４６９号公報、実開昭６１−１５２８８６号公報、特開平４−１０７３９０号公報、実開平６−１８７９０号公報参照）。
【０００３】
これについて、前掲の特開平４−１０７３９０号公報で示された１例で説明する。
【０００４】
図６において、布設されている合成樹脂製排水管（既設管ともいう）５０の一部が破損した場合、この破損箇所を修理するときに、２つのヤリトリ型接合部材５１，５１を用いて修理する。
【０００５】
すなわち、この排水管５０の不良箇所のある管体を、切断箇所５２，５２を定めて切取り、そこに新規な管体５３を挿入して（介在させて）、元の排水管５０と接続するときに、このヤリトリ型接合部材５１を用いる。
【０００６】
このヤリトリ型接合部材５１は、一般にゴム輪受口カラ−（ＷＲと略号する）５１ａとして、下水道用硬質塩化ビニル管で規格化されているものを用いる。
【０００７】
すなわち、このゴム輪受口カラ−５１ａは、カラ−本体５４の両端部内面に形成されたシ−ル溝５５，５５にそれぞれゴム輪５６を嵌挿して構成している。
【０００８】
因みに、このゴム輪受口カラ−５１ａは前記規格によれば、その寸法は呼び径（例えば１２５ｍｍφ）に対しカラ−本体５４の軸長（例えば最大２００ｍｍ）やゴム輪５６間隔（例えば最小７６ｍｍ）の寸法等が決められている。
【０００９】
そこで、このヤリトリ型接合部材５１を２つ用いて不良箇所が切り取られた既設の排水管５０の上、下流側にそれぞれ外嵌して、２点鎖線のようにそれぞれスライドさせておき、新規な管体（挿入管または挿入用管本体または接続用短管ともいう）５３を挿入してから、これらのヤリトリ型接合部材５１を前記切断箇所５２を跨ぐようにそれぞれスライドさせると、排水管５０の修理ができる。
【００１０】
ところで前記規格によると、ゴム輪受口カラ−５１ａそのものは、負圧試験の合格、つまり封水性や、地震時の抜止め安全性を確保すると共に、市場に提供されている他のゴム輪受口カラ−との互換性に支障がないようにしている。
【００１１】
ところが、前記ゴム輪受口カラ−５１ａをヤリトリ接合部材５１に用いた場合、２つの切断箇所５２を中にして、このゴム輪受口カラ−５１ａが既設の排水管５０と新規な管体５３とにスライドして跨ぐことから、計４つの接合長さ（ゴム輪受口における接合長さ、すなわち、ゴム輪からストッパ−迄の間隔に相当）ができ、これらは必ずしも規格値通りにはならず、片寄ることもあって施工の信頼性に欠けるおそれがあった。
【００１２】
そこで本出願人は、規格化されているゴム輪受口カラ−をヤリトリ接合部材に適用したとき、かかる規格による信頼性が確実に生かされることを目的として、同一寸法の２つのゴム輪受口カラ−を挿入管に外嵌して、互に離反するようにスライドさせたとき抜止めすると共に、互に近接するようにスライドさせたとき該挿入管の管長内に収まるようにした排水設備用合成樹脂製ヤリトリ型接合部材を用いて、既設の上、下流側の排水管を接続するに当り、該接続箇所を前記挿入管の管長と略同一長さにした後、該接続箇所へ、前記ゴム輪受口カラ−に近接させた挿入管を挿入してから、これらのゴム輪受口カラ−を抜止めストッパ−迄離反させることにより、該ゴム輪受口カラ−に挿入する既設の排水管の接合長さを規格値に合致させて、排水管の接続を行うことを特徴とする排水設備用合成樹脂製ヤリトリ型接合部材を提案した（特願平１１−３３１３９５号）。
【００１３】
ところで本出願人は、かかる提案のヤリトリ型接合部材１を次のように適用することを試みた。
【００１４】
すなわち、図４に示すように既設の排水管８において、不良箇所５７をもつ切取り排水管部５０Ａを、施工後、不連続による段差や内周溝を発生させないため、新規な挿入管３と同じ管長Ｓで切取り、そこに適用することを試みた。
【００１５】
その新規な挿入管３の管長は製品長さといわれ、最小限のスペ−スで修理するメリットを生かすため、２つのゴム輪受口カラ−２，２の合計長さに構成している。
【００１６】
したがって、生産工場出荷の流通上も好都合であるばかりでなく、無駄な掘削を防止したり、既設の排水管の切管長さの目安にもできる。
【００１７】
なお、図４の排水管８について更に説明すると、（Ａ）において既設の排水管８は上、下流側の各設備１４，１４は固定状態にあるので、前記のように不良箇所５７をもつ切取り排水管部５０Ａを製品長さのＳで切取った後、ヤリトリ型接合部材１を矢印ａのように持下げて介在させる。
【００１８】
次いで、図４（Ｂ）に示すように、このヤリトリ型接合部材１と既設の排水管８との軸芯（管軸）を同一直線上に合せてから、２つのゴム輪受口カラ−２，２を切断箇所を跨ぐようにそれぞれＢ矢方向に離反してスライドさせると、排水管８の修理ができる。
【００１９】
また本出願人は、前記提案のヤリトリ型接合部材１Ａを次のように適用することも試みた。
【００２０】
すなわち、図５に示すような既設の排水管８に、新規な合成樹脂（塩ビ）製排水ます１５を増設する場合にも適用することを試みた。
【００２１】
なお、図５の排水管８への新規な排水ます１５の増設について更に説明すると、この排水ます１５はインバ−ト型であって、複数の上流側の枝管用接続口（受口）１６，１６…と１つの下流側の接続口（受口）１７と１つの点検用接続口（受口）１８とをもっており、この下流側の接続口１７と、該下流側の接続口１７と同一直線上の上流側の接続口１６とにそれぞれ、前記ゴム輪受口カラ−２を外嵌した接続用短管３Ａを挿入接続固着する。これが生産工場出荷品となっている。
【００２２】
そして、既設の排水管８を、この排水ます１５の上下流方向の長さｔで切取った後、この排水ます１５を矢印ａのように持下げて介在させる。次いで、上下流側の接続口１６，１７に接続している。いわゆる片受ソケットたるヤリトリ型接合部材１Ａのゴム輪受口カラ−２をスライドして排水管８へ外嵌させる。
【００２３】
【発明が解決しようとする課題】
ところが、かかるヤリトリ型接合部材１，１Ａでは、捩れを生じ易いゴム輪をもつヤリトリ型接合部材１，１Ａと既設の排水管８とは、正確な軸芯合せを必要とするが、本来、修理や増設の場合は掘削部分が狭隘であったり、時として、湧水地でもあって、その軸芯合せ作業が面倒となっていた。
【００２４】
殊に、当該ヤリトリ型接合部材１，１Ａを持下げながら支持して軸芯合せ（同一直線上にする）をしてから、 2個のゴム輪受口カラ−２，２を左右にスライドさせる作業は、軸芯合せ専用の支持部分を構成していないヤリトリ型接合部材１では、支持した手でスライドさせる作業となって、斜めにスライドさせる力を作用することもあってゴム輪にとって好ましくなく、ひいては、配慮しながらの作業となり、更に面倒となる。
【００２５】
また、図５で示す排水ます１５の増設の場合には、前記提案のヤリトリ型接合部材１Ａがそのまま適用できない問題も生じた。
【００２６】
そこで本発明は、かかる新しく発見した問題を解決することを主たる目的とし、従来のヤリトリ型接合部材に比べ生産性や生産費を損なわないことを副たる目的とするものである。
【００２７】
【課題を解決するための手段】
そこで本発明は、かかる目的を達成するため、１）ゴム輪受口カラ−を接続用短管にスライド自在に外嵌して収め、該短管と既設管とを接続するときに用いる合成樹脂製ヤリトリ型接合部材にあって、前記ゴム輪受口カラ−の前記既設管側の外端に、従来の成形金型の手直しで可能となる円弧状庇型または円弧状爪の小片からなる軸芯合せ部を軸方向にはみ出すように突設し、該軸芯合せ部を、前記既設管の外面に当接して両管の管軸を同一直線上にする軸芯合せを行った後、該ゴム輪受口カラ−を支持した手により、既設管側へ該軸芯合せ部を当接させた状態でスライドさせるようにしたことを特徴とする合成樹脂製ヤリトリ型接合部材にあり、また、２）略同一寸法の２つのゴム輪受口カラ−を挿入管に外嵌して収め、互に離反・近接するように該ゴム輪受口カラ−を支持した手により、スライドさせると共に、該近接させたとき該挿入管の管長内に収まるようにした排水設備用合成樹脂製ヤリトリ型接合部材において、前記挿入管と既設の排水管との管軸を同一直線上にする軸芯合せを行うため、前記ゴム輪受口カラ−の両方または片方の離反側外端に、従来の成形金型の手直しで可能となる円弧状庇型または円弧状爪の小片からなる軸芯合せ部を軸方向にはみ出すように突設し、該軸芯合せ部を、上および／または下流側の排水管外面に当接させた状態でスライドさせて、前記挿入管と排水管とを接続するようにしたことを特徴とする排水設備用合成樹脂製ヤリトリ型接合部材にあり、また、３）ゴム輪受口カラ−を挿入管にスライド自在に外嵌して収めた合成樹脂製ヤリトリ型接合部材にあって、前記ゴム輪受口カラ−と挿入管との間に抜止め用ストッパ−を設けることにより、該ゴム輪受口カラ−がスライドしたときのストッパ−にすることにより、該ゴム輪受口カラ−が挿入する既設管の接合長さを規格値に合致させるようにし、しかも、前記ゴム輪受口カラ−の前記既設管側外端に、前記挿入管と既設管との管軸を同一直線上にする軸芯合せを行うための、従来の成形金型の手直しで可能となる少なくとも最大上半分に形成された、円弧状庇型または円弧状爪の小片からなる軸芯合せ部を軸方向にはみ出すように突設し、該軸芯合せ小片を既設管の外面に当接させた状態で、ゴム輪受口カラ−を支持した手により、既設管側へスライドさせるようにしたことを特徴とする合成樹脂製ヤリトリ型接合部材にあり、また、４）増設用合成樹脂製排水ますの上および下流側接続口に、それぞれ接続用短管を設け、これらの短管にそれぞれゴム輪受口カラ−をスライド自在に外嵌して収め、これらの設けられた短管の外端間の長さを、既設の排水管の切取り長さとして該排水ますを介在させるに当り、前記ゴム輪受口カラ−の排水管側外端に、前記短管と排水管との管軸を同一直線上にする軸芯合せを行うため、成形金型の手直しで可能となる少なくとも最大上半分に形成された、円弧状庇型または円弧状爪の小片からなる軸芯合せ部を軸方向にはみ出すように突設し、これらの軸芯合せ部を前記排水管の外面に載置してから、これらのゴム輪受口カラ−を支持した手により、該排水管側へ該軸芯合せ部を排水管に当接させた状態でスライドさせるようにしたことを特徴とする排水ます用合成樹脂製ヤリトリ型接合部材を要旨とする。
【００２８】
したがって、本発明は次の実施態様に代表的に適用される。
【００２９】
（１）略同一寸法の２つのゴム輪受口カラ−が外嵌され、かつ、これらの２つのゴム輪受口カラ−を近接させたとき収まる挿入管を用いるに当り、既設管の切取り長さを該挿入管の管長に等しくして既設管の最小切取り長さとしたもの。
【００３０】
（２）増設用合成樹脂製排水ますの上および下流側接続口に、それぞれ接続用短管を設け、これらの２つの短管に、それぞれゴム輪受口カラ−をスライド自在に外嵌し、排水ますにセットされている。これらの短管の外端間における長さを、既設管の切取り長さにしたもの。
【００３１】
【発明の実施の形態】
本発明を添付図面に示す実施例により詳細に述べる。
【００３２】
図１は本発明の第１の実施例の管軸に沿う上半分の断面図と下半分の外面図、図２は図１の要部図で、（Ａ）は一部切欠正面図、（Ｂ）は軸に沿う縦断面図、図３は第２の実施例の軸に沿う断面図で、前記図６で示す従来技術と共通する部分は省略ないし簡略にするので、これを補充する必要がある。
【００３３】
先ず、本発明のヤリトリ型接合部材１，１Ａの「創作に係る前提部分」を述べ、次いで、本発明の「特徴部分」を述べる。
【００３４】
そして、本発明は特に公共下水道を含めた排水設備に用いる。
【００３５】
本発明の「創作に係る前提部分」を以下述べる。
【００３６】
本発明の第１の本実施例の合成樹脂製（塩ビ製）ヤリトリ型接合部材（ヤリトリ型ゴム輪両口または両受口ソケットともいう）１は、図１および図２に示すように、同一寸法（勿論、同一形状）または軸長のみ若干異なる寸法の２つのゴム輪受口カラ−２，２を、１つの挿入用管本体（単に挿入管という）３に対称的に（向き合って）スライド自在に外嵌して構成し、特に、このゴム輪受口カラ−（ＷＲ）２は日本下水道協会制定の規格を満足し、しかも、かかるゴム輪受口カラ−２からなるヤリトリ型接合部材１もまた、前記規格の制定根拠をなす封水性や、地震による抜止性や、互換・汎用性を満足しているものである。
【００３７】
因みに、図２において、このゴム輪受口カラ−２が呼び径１００ｍｍφの場合、カラ−本体１０の軸長Ｚ１＝１１３．５ｍｍ（＜１８０ｍｍ）、ゴム輪外形間隔Ｚ２＝９５ｍｍ（＞６６ｍｍ）、カラ−内径ｄ＝１１６ｍｍφ（＞１１４．５ｍｍφ）の寸法で構成され、カッコ内の規格値を満足している。
【００３８】
次に、本第１の実施例のヤリトリ型接合部材１が規格の根拠をなす封水性等を満足することについて述べる。
【００３９】
このゴム輪受口カラ−２の１つには当然、両端部内面、つまり１対のゴム輪４，５を設けているが、これらの２つのゴム輪受口カラ−２，２は対称的に挿入用管本体３に外嵌されて、互に近接・離反するようスライドする。このスライド自在に外嵌された２つのゴム輪受口カラ−２，２における各ゴム輪４，５のうち互に隣設する側のゴム輪５，５の各内側には、縮径傾向の弾性を有するストッパ−Ｃリング６，６を設けている。
【００４０】
なお、このストッパ−Ｃリング６は図示のようにゴム輪受口カラ−２側に設けているが、挿入用管本体３側の定位置に設けてもよい。
【００４１】
一方、挿入用管本体３の両端部外面には、これらのストッパ−Ｃリング６が係止するガイド用傾斜面１３とストッパ−段部とのあるストッパ−凹溝７，７を周設している。したがって、ストッパ−Ｃリング６が弾性により縮径してストッパ−凹溝７に落込み嵌合すると、ゴム輪受口カラ−２は挿入用管本体３から外方向に抜けないようになる。
【００４２】
なお、このストッパ−Ｃリング６を挿入用管本体３側に設けた場合、図示しないが、ゴム輪受口カラ−２の内面にガイド用傾斜面（１３）とストッパ−段部のあるストッパ−凹溝７を凹設する。
【００４３】
すなわち、２つのゴム輪受口カラ−２，２が互に離反したスライドしたとき挿入管用本体３から外れないようにストップさせ、そのとき、つまり、ゴム輪受口カラ−２を外方向にいっぱいに引張ったとき、離反した状態のゴム輪受口カラ−２の、既設の排水管８との接合長さＬが規格値（ゴム輪受口における接合長さに相当）を満足するようにしている。
【００４４】
勿論、そのとき、排水管８と挿入用管本体３とは当接させて接続する。つまり、排水管８に挿入用管本体３を当接させた状態で、両方のゴム輪受口カラ−２を排水管８へストップする迄単に機械的に張って離反スライドさせる。
【００４５】
したがって、このヤリトリ型接合部材１を用いると、例えば既設の排水管８との封水性や地震による抜止め性や互換・汎用性については保証されるのである。
【００４６】
なお、このとき、このゴム輪受口カラ−２と挿入用管本体３との接合長さａは、ストッパ−Ｃリング６を設けているので、規格値より小であってもよい。したがって、通常のゴム輪受口カラ−２を２つ用いた場合（例えば図６のもの）より挿入用管本体３の軸長を短くすることができる。
【００４７】
以上のように品質が保証されたヤリトリ型接合部材１は、前記図６の従来例で述べたような管途中の破損箇所の修理に用いたり、また、既設の排水ますと公共ますとの接続に用いることができる。
【００４８】
特に、後者の使用について述べると、従来、この種の接続に用いている、差口とゴム輪受口とをその管底を一致させて一体にしたスライド継手（前掲の実開昭６０−３６４６９号公報やアロン化成製ＣＵＳＬＲ継手参照）では、接続後、管底に段差が形成され、排水の溜まりとなってつまりの原因になるが、このヤリトリ型接合部材１を代りに用いると、これを防ぐ特長をもっている。
【００４９】
特に、このヤリトリ型接合部材１で、前記図４で述べたように、同一寸法のゴム輪受口カラ−２を２つ用いたタイプでは、挿入用管本体３上で両者を突き合せてると、両者は挿入用管本体３と略等しくなり、したがって、１つのゴム輪受口カラ−２は挿入用管本体３の略半分の軸長となり、コンパクトになって出荷され、現場に持込むことができる、という特長をもっており、また、既設の排水管８の不良箇所の修理の場合には、その不良箇所の切取った排水管部５０Ａが軸長を挿入用管本体３の軸長に等しくする、という切断箇所の作業標準にもなる特長をもっている。
【００５０】
次に、以上のヤリトリ型接合部材１を具体的に詳述する。
このヤリトリ型接合部材１は、前記図６の従来例のように、主として既設排水管８が部分的に破損したときの補修に用いられる。
【００５１】
このゴム輪受口カラ−２は、規格上も同名で表示されており、カラ−本体（短管）１０の両端部内面にそれぞれゴム輪をもっているものであり、このゴム輪そのものは規格化されていない。
【００５２】
したがって、このゴム輪受口カラ−２における一方のゴム輪４，（４Ａ）は、断面Ｃ（Ｕパッキン）またはＶ字状（リップ付パッキン）のシ−ルリングで構成し、Ｃ字状の場合（図３参照）、Ｃ字連結部が摺動面になっている。そのため、このゴム輪４が嵌挿するシ−ル溝９は若干大きくなり、カラ−本体１０を膨出して形成している。
【００５３】
他方ゴム輪５は、いわゆるＯリングで構成し、このゴム輪５が嵌挿するシ−ル溝１１は小さいため、カラ−本体１０の内面を穿設して形成している。
【００５４】
このシ−ル溝１１に隣設して内側（カラ−本体１０の開口に対する内方向をいう）に、ストッパ−Ｃリング６が嵌合するリング溝１２を形成している。
【００５５】
このリング溝１２はシ−ル溝１１より大のため、前記シ−ル溝９と同様、カラ−本体１０を膨出して形成している。
【００５６】
このストッパ−Ｃリング６は、バネ鋼またはエンプラ（変性ＰＰＯ等）からなる断面４ｍｍ角のＣリングで構成し、その自然体の内径は挿入用管本体３の外径より小にし、この挿入用管本体３に外嵌すれば常時縮径力が作用する（縮径傾向の弾性をいう）ようになっている。
【００５７】
このストッパ−Ｃリング６が係止する、挿入用管本体３のストッパ−凹溝７は内側にガイド用傾斜面１３を形成し、ストッパ−Ｃリング６が挿入用管本体３の内方向には容易にスライドするようになっている。
【００５８】
なお、挿入用管本体３の端部外周の定位置にストッパ−Ｃリング６を設けた場合、不図示であるが、ガイド用傾斜面（１３）のあるストッパ−凹溝（７）はカラ−本体１０のシ−ル溝９，１１の内側に２つ設け、ゴム輪受口カラ−２の近接・離反時にそれぞれストッパ−させることができ、したがって、挿入用管本体３が前記のものより長尺ものにすることができる。
【００５９】
なお、本第１の実施例の２つのゴム輪受口カラ−２，２は形状寸法共に同一であるが、本発明はこれに限らず、カラ−本体１０の軸長のみ若干異なる２つのゴム輪受口カラ−であってもよい。但し、これらの異なる２つのゴム輪受口カラ−の、排水管（単に管を指す）８との接合長さＬは、少なくとも規格値を満たすものでならなければならない。
【００６０】
次に、本発明の第２の実施例のヤリトリ型接合部材（片受ソケットともいう）１Ａについて述べる。図３において、このヤリトリ型接合部材１Ａは前記図５の述べた排水ます１５の上および下流側の接続用短管３Ａに、１つのゴム輪受口カラ−２をそれぞれスライド自在に外嵌して構成し、特に、このゴム輪受口カラ−２は日本下水道協会制定の規格を満足し、しかも、かかるゴム輪受口カラ−２からなるヤリトリ型接合部材１Ａもまた、前記規格の制定根拠をなす封水性や、地震による抜止性や、互換・汎用性を満足している。
【００６１】
このゴム輪受口カラ−２の構成や寸法や封水性等については、前記第１の実施例のヤリトリ型接合部材１の片側（左または右）のものと同様につき省略するので、これをそのまま補充する必要がある。
【００６２】
また、このゴム輪受口カラ−２を用いたヤリトリ型接合部材１Ａをもつ排水ます１５の使用法は、図５で既に述べたので省略する。
【００６３】
さて、本発明の「特徴部分」を以下述べる。
【００６４】
これらの第１および第２の実施例のヤリトリ型接合部材１，１Ａでは、次のような軸芯合せ部２０，２０Ａを、ゴム輪受口カラ−２の外端に、呼び径１００ｍｍφであれば製品長さＳより５〜１０ｍｍ程度、はみ出すように軸方向に突出させている。
【００６５】
したがって、この軸芯合せ部２０，２０Ａは、製品長さＳ、すなわち切取り排水管部（５０Ａ）の管長より突出しているので、挿入用管本体３や排水ます１５を既設の排水管８，８間に介在させると、この排水管８の切断箇所（５２）を若干越えて跨ぐようにのせることになる。
【００６６】
すなわち、前記図４や図５のａ矢視方向にこのヤリトリ型接合部材１，１Ａを持下げて介在させると、この軸芯合せ部２０，２０Ａが既設の排水管８の管端上面（外面）に載置（当接）するので、このヤリトリ型接合部材１，１Ａを特に手で支持しながら調整することなく、自動的に挿入用管本体３や排水ます１５の接続用短管１９と排水管８との同一直線上の軸芯合せができる。
【００６７】
勿論、小片の軸芯合せ部（軸芯合せ小片）２０，２０Ａに構成したので、射出成形用金型の若干の手直しで従来の生産費、生産性どおりにすることができる。
【００６８】
この軸芯合せ部２０，２０Ａを更に詳述する。
【００６９】
図１で示す軸芯合せ部２０は円弧状庇型に構成され、シ−ル溝９の外側で突出している。このゴム輪受口カラ−２のカラ−本体１０が挿入用管本体３や同径の既設の排水管８の外周面に外嵌されてスライドすることから、この円弧状庇型軸芯合せ部２０は、このカラ−本体１０と同じ内外径（同じ肉厚）で構成し、その先端内面を若干傾斜のラッパ状に面トリ２１を施して、ゴム輪受口カラ−２のスライドに支障のないようにしている。
【００７０】
この円弧は、既設の排水管８に載置されることから、カラ−本体１０の少なくとも最大上半分（管軸を通る水平面の上半分つまり円周１／２）から上方１／４円周に形成する。
【００７１】
また、図２および図３で示す軸芯合せ部２０Ａは爪型に構成され、シ−ル溝９の外側で突出している。この爪型軸芯合せ部２０Ａは、前記円弧状庇型のもの（２０）を分断して 3個〜 4個の爪に構成している。
【００７２】
したがって、爪の突出長さは前記と同様５〜１０ｍｍは程度でよいが、爪の巾は基部で１２ｍｍ、先部で８ｍｍ程度の台形状に形成している。
【００７３】
この爪型軸芯合せ部２０Ａは、前記円弧状庇型軸芯合せ部２０に比べ、ゴム輪受口カラ−２の支持能力を同じくしながら、ゴム輪受口カラ−２のスライドに更に支障を与えない。
【００７４】
なお、これらの軸芯合せ部２０，２０Ａは、前記第１または第２の実施例のヤリトリ型接合部材１，１Ａに限らず、一般のヤリトリソケットのＷＲにも適用できる。
【００７５】
また、第１の実施例のヤリトリ型接合部材１の場合、若干の作業性を犠牲にすれば、片方のゴム輪受口カラ−２のみに軸芯合せ部２０を設ければよく、他方には従来の在庫のゴム輪受口カラ−５１ａを使ってもよい。
【００７６】
【発明の効果】
請求項１、２の発明によると、ゴム輪受口カラ−に軸芯合せ小片を設けたので、ゴム輪受口カラ−のスライドが円滑となってゴム輪を損傷せず、ひいては、視認確認不可の施工の信頼性を得ることができる。殊に、小片の軸芯合せ部であるので、生産性や生産費が従来と遜色なく、しかも、ヤリトリ型接合部材を用いる修理や増設地における狭い場所でも施工容易となる。
【００７７】
請求項３の発明によると、前記の外、ゴム輪受口カラ−と挿入管との間に抜止め用ストッパ−を設けたので、作業を単純化しながらヤリトリ型接合部材の全体が規格値をクリアすることになり、特に規格化されていなくても準規格品として封水性や地震による抜止め性や互換・汎用性を保証することができ、施工の信頼性を高めることができる。
【００７８】
また、請求項４の発明によると、増設する比較的大型の排水ますの取扱い、特に軸芯合せが容易であると共に、ゴム輪の損傷を防止し、これを損傷すれば排水ます自身も取換える、ということも含めて、施工費を安く抑え、かつ、施工の信頼性を高めることができる。
【図面の簡単な説明】
【図１】本発明の第１の実施例の管軸に沿う上半分の断面図と下半分の外面図である。
【図２】図１の要部図で、（Ａ）は一部切欠正面図、（Ｂ）は軸に沿う縦断面図である。
【図３】本発明の第２の実施例の軸に沿う断面図である。
【図４】第１の実施例の使用説明図である。
【図５】第２の実施例の使用説明図である。
【図６】従来例である。
【符号の説明】
１…ヤリトリ型接合部材、２…ゴム輪受口カラ−、３…挿入用管本体、６…ストッパ−Ｃリング、７…ストッパ−凹溝、２０，２０Ａ…軸芯合せ部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin spear-type joining member, and particularly to a synthetic resin spear-type joining member for drainage equipment.
[0002]
[Prior art]
In general, synthetic resin (PVC) spear-type joint members (also called slide joints or spear sockets) used for drainage equipment are a horizontal pipe when both the upstream and downstream equipments are in a fixed state. (See, for example, Japanese Utility Model Laid-Open No. 60-36469, Japanese Utility Model Laid-Open No. 61-152886, Japanese Patent Laid-Open No. 4-107390, and Japanese Utility Model Laid-Open No. 6-18790) .
[0003]
This will be described with reference to an example shown in the above-mentioned Japanese Patent Laid-Open No. 4-107390.
[0004]
In FIG. 6, when a part of the installed synthetic resin drain pipe (also referred to as an existing pipe) 50 is damaged, when repairing the damaged portion, repair is performed using the two spliced joint members 51, 51. To do.
[0005]
That is, the pipe body having a defective portion of the drain pipe 50 is cut by defining the cut sections 52, 52, and the new pipe body 53 is inserted (intervened) there and connected to the original drain pipe 50. Sometimes, this spear-type joining member 51 is used.
[0006]
This spear-type joining member 51 is generally a rubber ring receiving collar (abbreviated as WR) 51a that is standardized with a hard polyvinyl chloride pipe for sewerage.
[0007]
That is, the rubber ring receiving collar 51a is configured by fitting rubber rings 56 into seal grooves 55 and 55 formed on the inner surfaces of both ends of the color main body 54, respectively.
[0008]
Incidentally, according to the above standard, the size of the rubber ring receiving collar 51a is the axial length (for example, maximum 200 mm) of the collar main body 54 and the distance between the rubber rings 56 (for example, minimum 76 mm) with respect to the nominal diameter (for example, 125 mmφ). The dimensions are determined.
[0009]
Therefore, the two drainage-type joining members 51 are fitted on the downstream side of the existing drain pipe 50 from which the defective portion has been cut off, respectively, and are slid as shown by two-dot chain lines. After inserting the pipe body (also referred to as an insertion pipe, an insertion pipe main body, or a connecting short pipe) 53 and then sliding these spear-type joining members 51 across the cut portion 52, the drain pipe 50 Can be repaired.
[0010]
By the way, according to the above-mentioned standard, the rubber ring receiving collar 51a itself has passed the negative pressure test, that is, the sealing performance and the safety of retaining in the event of an earthquake, and other rubber ring receivers provided on the market. The compatibility with the mouth color is not hindered.
[0011]
However, when the rubber ring receiving collar 51a is used as the splicing joint member 51, the rubber ring receiving collar 51a is provided with the existing drain pipe 50 and the new pipe 53 with the two cut portions 52 in the middle. In this way, a total of four joint lengths (corresponding to the joint length at the rubber ring receptacle, that is, the distance from the rubber ring to the stopper) can be obtained. In addition, there was a risk that construction reliability would be lacking because it was offset.
[0012]
Therefore, the present applicant, when applying a standardized rubber ring receiving collar to the spliced joint member, has two rubber ring receiving openings of the same size for the purpose of reliably utilizing the reliability of the standard. For drainage equipment that fits within the tube length of the insertion tube when the collar is externally fitted to the insertion tube and is slid away from each other and slid so as to be close to each other Using a synthetic resin spear-type joining member, when connecting the existing drain pipe on the downstream side, after making the connection portion substantially the same length as the tube length of the insertion tube, to the connection portion, After inserting the insertion tube in the vicinity of the rubber ring receiving collar, by separating these rubber ring receiving collars to the retaining stopper, the existing drainage inserted into the rubber ring receiving collar is inserted. Match the pipe joint length to the standard value and Proposed drainage synthetic resin exchanges junction member, characterized in that for connecting the tubes (Japanese Patent Application No. 11-331395).
[0013]
By the way, the present applicant tried to apply the proposed spear-type joining member 1 as follows.
[0014]
That is, in the existing drainage pipe 8, as shown in FIG. 4, the cutout drainage pipe portion 50A having the defective portion 57 is the same as the new insertion pipe 3 in order not to generate a step or inner peripheral groove due to discontinuity after construction. Trimming with a tube length S and trying to apply to it.
[0015]
The tube length of the new insertion tube 3 is said to be the product length, and is composed of the total length of the two rubber ring receiving collars 2 and 2 in order to take advantage of the repair with the minimum space.
[0016]
Therefore, it is not only convenient for the distribution of the production factory, but also can prevent wasteful excavation and can be used as a guide for the length of the existing drainage pipe.
[0017]
The drainage pipe 8 in FIG. 4 will be further described. In FIG. 4A, the existing drainage pipe 8 is on the upper side and the downstream equipments 14 and 14 are in a fixed state. After the drain pipe portion 50A is cut off at the product length S, the spear-type joining member 1 is lowered and interposed as shown by an arrow a.
[0018]
Next, as shown in FIG. 4 (B), the shaft cores (tube shafts) of the spear-type joining member 1 and the existing drainage pipe 8 are aligned on the same straight line, and then the two rubber ring receptacles 2 , 2 are slid apart in the direction of the arrow B so as to straddle the cut portion, the drainage pipe 8 can be repaired.
[0019]
The present applicant also tried to apply the proposed spear-type joining member 1A as follows.
[0020]
That is, an attempt was made to apply to the case where a new synthetic resin (vinyl chloride) drainage basin 15 is added to the existing drainage pipe 8 as shown in FIG.
[0021]
5 will be further explained. The drainage drain 15 is an inverter type, and has a plurality of upstream side branch connection ports (receiving ports) 16, 16, one downstream connection port (receiving port) 17 and one inspection connection port (receiving port) 18, and the downstream connection port 17 and the downstream connection port 17 are directly connected to each other. A connecting short pipe 3A fitted with the rubber ring receiving port collar-2 is inserted, connected and fixed to the upstream connection port 16 on the line. This is the product shipped from the production factory.
[0022]
Then, after the existing drain pipe 8 is cut off by the length t in the upstream and downstream direction of the drainage basin 15, the drainage basin 15 is lowered and interposed as shown by an arrow a. Subsequently, it connects to the upstream and downstream connection ports 16 and 17. The rubber ring receiving collar 2 of the spear-type joining member 1 </ b> A which is a so-called single receiving socket is slid and fitted onto the drain pipe 8.
[0023]
[Problems to be solved by the invention]
However, in the spear-type joining members 1 and 1A, the spear-type joining members 1 and 1A having rubber rings that are likely to be twisted and the existing drain pipe 8 require accurate axial alignment. In the case of or expansion, the excavation part was narrow, and sometimes it was also a spring area, and the alignment work of the shaft was troublesome.
[0024]
In particular, after supporting the spliced joint member 1 and 1A while lowering and aligning the shafts (aligning on the same straight line), slide the two rubber ring receiving collars 2 and 2 to the left and right. In the spear-type joining member 1 that does not constitute a support part dedicated to the alignment of the shaft, the work is slid with a supported hand, and it is not preferable for the rubber ring because it may exert an oblique sliding force. And, as a result, it is a work that takes into consideration, and it becomes even more troublesome.
[0025]
Further, in the case of adding the drainage basin 15 shown in FIG. 5, there also arises a problem that the proposed spear-type joining member 1A cannot be applied as it is.
[0026]
Therefore, the main object of the present invention is to solve such a newly discovered problem, and it is a secondary object that the productivity and the production cost are not impaired as compared with the conventional spear-type joining member.
[0027]
[Means for Solving the Problems]
Therefore, in order to achieve the above object, the present invention provides: 1) a synthetic resin used when a rubber ring receiving collar is slidably fitted into a short connecting pipe and the short pipe is connected to an existing pipe. A shaft made of a small piece of arc-shaped saddle-shaped or arc-shaped claw at the outer end of the rubber ring receiving collar on the existing pipe side, which is made possible by reworking a conventional molding die. The centering portion is projected so as to protrude in the axial direction, and the shaft centering portion is brought into contact with the outer surface of the existing pipe to perform axial centering so that the tube axes of both pipes are on the same straight line. It is a synthetic resin spear-shaped joining member characterized in that it is slid in a state where the shaft centering portion is in contact with the existing pipe side by a hand supporting the rubber ring receiving collar, 2) Fit two rubber ring receiving collars of approximately the same size by fitting them into the insertion tube, and keep them apart or close to each other. In the synthetic resin spear-type joint member for drainage equipment, which is slid by a hand supporting the rubber ring receiving collar as described above, and fits within the tube length of the insertion tube when approached. And the existing drainage pipe are aligned on the same straight line, so that it is possible by reworking a conventional molding die on both or one of the outer ends of the rubber ring receiving collars. An axial centering portion made of a small piece of arc-shaped saddle shape or circular arc-shaped claw is projected so as to protrude in the axial direction, and the axial centering portion is brought into contact with the upper and / or downstream drain pipe outer surface. It is slid in a state to connect the insertion pipe and the drain pipe, and is in a synthetic resin spear-type joining member for drainage equipment, and 3) a rubber ring receiving collar is inserted into the insertion pipe Synthetic resin spear slidably fitted inside By providing a stopper for retaining the rubber ring receiving collar between the rubber ring receiving collar and the insertion tube, so that the rubber ring receiving collar can be used as a stopper when the rubber ring receiving collar slides. The joining length of the existing pipe inserted into the rubber ring receiving collar matches the standard value, and the insertion pipe and the existing pipe are provided at the outer end of the rubber ring receiving collar at the existing pipe side. It consists of a small piece of arc-shaped saddle-shaped or arc-shaped claw formed on at least the maximum upper half that can be made by reworking the conventional molding die to align the tube axis with the same straight line The shaft centering part protrudes in the axial direction, and the shaft centering small piece is in contact with the outer surface of the existing pipe, and is slid to the existing pipe side by the hand supporting the rubber ring receiving collar. In a synthetic resin spear-type joint member characterized in that 4) Short pipes for connection are provided at the upper and downstream connection ports of the synthetic resin drainage for expansion, and rubber ring receiving collars are slidably fitted on these short pipes. The length between the outer ends of the provided short pipes is taken as the cut-out length of the existing drain pipe, and when the drainage is interposed, the rubber ring receiving collar is attached to the drain pipe side outer end. An arc-shaped saddle shape or an arc-shaped claw formed on at least the uppermost half which can be formed by reworking the molding die in order to perform axial centering so that the tube axis of the short pipe and the drain pipe is on the same straight line The shaft centering portions made up of small pieces are projected so as to protrude in the axial direction, and these shaft centering portions are placed on the outer surface of the drainage pipe, and then the rubber ring receiving collars are supported by the hand. So that the shaft centering portion is slid toward the drainage pipe while being in contact with the drainage pipe. And gist catch basin for synthetic resin exchanges junction member, characterized in that the.
[0028]
Therefore, the present invention is typically applied to the following embodiments.
[0029]
(1) When using an insertion tube in which two rubber ring receiving collars having substantially the same dimensions are externally fitted and these two rubber ring receiving collars are brought close to each other, the cut length of the existing pipe The length is made equal to the tube length of the insertion tube, and is the minimum cut-out length of the existing tube.
[0030]
(2) The synthetic resin drainage for expansion is provided with connecting short pipes at the upper and downstream connection ports, respectively, and rubber ring receiving collars are slidably fitted around these two short pipes, Set to drain. The length between the outer ends of these short pipes is the cut length of the existing pipe.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
The invention will be described in more detail by means of an embodiment shown in the accompanying drawings.
[0032]
1 is a cross-sectional view of the upper half of the first embodiment of the present invention and an outer view of the lower half along the tube axis, FIG. 2 is a principal view of FIG. 1, and FIG. B) is a longitudinal sectional view taken along the axis, and FIG. 3 is a sectional view taken along the axis of the second embodiment. Since parts common to the prior art shown in FIG. 6 are omitted or simplified, it is necessary to supplement them. There is.
[0033]
First, the “premise part concerning creation” of the spear-type joining members 1 and 1A of the present invention will be described, and then the “characteristic part” of the present invention will be described.
[0034]
The present invention is particularly used for drainage facilities including public sewers.
[0035]
“Prerequisites for Creation” of the present invention will be described below.
[0036]
As shown in FIGS. 1 and 2, the synthetic resin (vinyl chloride) spear-type joint member (also referred to as a spear-type rubber ring both-end or both-end socket) 1 of the first embodiment of the present invention is the same. Two rubber ring receptacles 2 and 2 having dimensions (of course, the same shape) or slightly different dimensions only in the axial length slide symmetrically (face each other) to one insertion tube main body (simply called an insertion tube) 3. The rubber ring receiving collar (WR) 2 satisfies the standard established by the Japan Sewerage Association and, moreover, the spear-type joining member 1 comprising such a rubber ring receiving collar 2 is constructed. In addition, it satisfies the sealing properties that form the basis for establishing the standard, the seizure resistance due to earthquakes, and compatibility and versatility.
[0037]
Incidentally, in FIG. 2, when the rubber ring receiving collar 2 has a nominal diameter of 100 mmφ, the axial length Z1 of the collar body 10 is 113.5 mm (<180 mm), the rubber ring outer dimension Z2 is 95 mm (> 66 mm), The inner diameter of the collar is d = 116 mmφ (> 114.5 mmφ) and satisfies the standard value in parentheses.
[0038]
Next, it will be described that the spear-type joining member 1 according to the first embodiment satisfies the water-sealing property that forms the basis of the standard.
[0039]
Naturally, one of the rubber ring receiving collars 2 is provided with inner surfaces at both ends, that is, a pair of rubber rings 4 and 5, but these two rubber ring receiving collars 2 and 2 are symmetrical. Are inserted into the insertion tube main body 3 and slid so as to approach and separate from each other. On the inner side of the rubber rings 5 and 5 on the side adjacent to each other of the rubber rings 4 and 5 in the two rubber ring receiving collars 2 and 2 slidably fitted outside, Stopper C-rings 6 and 6 having elasticity are provided.
[0040]
In addition, although this stopper C-ring 6 is provided in the rubber ring receiving mouth column-2 side as shown in the drawing, it may be provided in a fixed position on the insertion tube main body 3 side.
[0041]
On the other hand, on the outer surfaces of both ends of the insertion tube main body 3, there are provided guide-inclined surfaces 13 to which these stopper-C rings 6 are engaged and stopper-grooves 7, 7 having stopper-step portions. Yes. Therefore, when the stopper C-ring 6 is reduced in diameter by elasticity and falls into the stopper-concave groove 7, the rubber ring receiving collar 2 does not come out of the insertion tube body 3 in the outward direction.
[0042]
When this stopper C-ring 6 is provided on the insertion tube main body 3 side, although not shown, a stopper having a guide inclined surface (13) and a stopper stepped portion on the inner surface of the rubber ring receiving collar 2 is provided. A concave groove 7 is provided.
[0043]
That is, when the two rubber ring receptacles 2 and 2 are slid apart from each other, the rubber ring receptacles 2 and 2 are stopped so as not to come off from the main body 3 for insertion tube. When the rubber ring receiving collar 2 is separated, the joining length L with the existing drain pipe 8 satisfies the standard value (corresponding to the joining length at the rubber ring receiving opening). Yes.
[0044]
Of course, at that time, the drain pipe 8 and the insertion pipe main body 3 are brought into contact with each other and connected. That is, in a state where the insertion pipe main body 3 is in contact with the drain pipe 8, both the rubber ring receiving collars 2 are simply mechanically stretched and slid apart until they are stopped to the drain pipe 8.
[0045]
Therefore, when this spear-type joining member 1 is used, for example, sealing performance with existing drain pipe 8, seizure resistance due to earthquake, compatibility and versatility are guaranteed.
[0046]
At this time, the joining length a between the rubber ring receiving collar 2 and the insertion tube main body 3 may be smaller than the standard value because the stopper-C ring 6 is provided. Therefore, the axial length of the tube main body 3 for insertion can be shortened compared with the case where two normal rubber ring receptacles 2 are used (for example, those shown in FIG. 6).
[0047]
As described above, the spear-type joining member 1 whose quality is guaranteed is used for repairing a damaged portion in the middle of the pipe as described in the conventional example of FIG. Can be used.
[0048]
In particular, the latter use will be described. Conventionally, a slide joint that is used for this type of connection and has a rubber ring receiving port integrated with the tube bottoms aligned (see the above-mentioned Japanese Utility Model Application Laid-Open No. 60-36469). In the case of CUSLR fittings manufactured by Aronkasei Co., Ltd.), after connection, a step is formed at the bottom of the tube, which becomes a cause of clogging of drainage, but if this spear-type joining member 1 is used instead, Has the feature to prevent.
[0049]
In particular, in this spear-type joining member 1, as described with reference to FIG. 4, when two rubber ring receiving collars 2 having the same dimensions are used, both are abutted on the insertion tube body 3. Both are substantially the same as the tube main body 3 for insertion, and therefore, one rubber ring receiving collar 2 has an axial length that is substantially half that of the tube main body 3 for insertion, is shipped in a compact form, and is brought to the site. In the case of repairing a defective portion of the existing drainage pipe 8, the drainage pipe portion 50A cut out from the defective portion has an axial length equal to the axial length of the insertion pipe main body 3. It has the feature that it also becomes a work standard for cutting points.
[0050]
Next, the above spear-type joining member 1 will be specifically described in detail.
This spear-type joining member 1 is mainly used for repair when the existing drain pipe 8 is partially damaged as in the conventional example of FIG.
[0051]
The rubber ring receiving collar 2 is also indicated by the same name in the standard, and has rubber rings on the inner surfaces of both ends of the color body (short pipe) 10, and the rubber ring itself is standardized. Not.
[0052]
Accordingly, one rubber ring 4, (4A) in the rubber ring receiving collar 2 is constituted by a seal ring having a cross section C (U packing) or a V shape (packing with lip), and in the case of a C shape. (See FIG. 3), the C-shaped connecting portion is a sliding surface. Therefore, the seal groove 9 into which the rubber ring 4 is inserted is slightly enlarged, and the color body 10 is formed to bulge.
[0053]
On the other hand, the rubber ring 5 is formed of a so-called O-ring, and the seal groove 11 into which the rubber ring 5 is fitted is small, so that the inner surface of the color main body 10 is formed.
[0054]
A ring groove 12 into which the stopper C-ring 6 is fitted is formed on the inner side (referring to the inner direction with respect to the opening of the color body 10) adjacent to the seal groove 11.
[0055]
Since the ring groove 12 is larger than the seal groove 11, the collar body 10 is formed to bulge like the seal groove 9.
[0056]
The stopper C-ring 6 is constituted by a C-ring having a cross section of 4 mm square made of spring steel or engineering plastic (modified PPO or the like). The natural body has an inner diameter smaller than the outer diameter of the insertion tube body 3. When it is externally fitted to the main body 3, a diameter reducing force is always applied (referred to as elasticity of a diameter reducing tendency).
[0057]
The stopper-concave groove 7 of the insertion tube main body 3 to which the stopper-C ring 6 is locked forms a guide inclined surface 13 on the inner side, and the stopper-C ring 6 is inward of the insertion tube main body 3. It is designed to slide easily.
[0058]
When the stopper C-ring 6 is provided at a fixed position on the outer periphery of the end of the insertion tube main body 3, although not shown, the stopper-groove (7) having the guide inclined surface (13) is a collar. Two are provided on the inner side of the seal grooves 9 and 11 of the main body 10 and can be respectively stoppered at the time of approaching / separating the rubber ring receiving collar 2 so that the insertion tube main body 3 is longer than the above. It can be a scale.
[0059]
The two rubber ring receiving collars 2 and 2 of the first embodiment are the same in shape and size, but the present invention is not limited to this, and the two rubbers differing only in the axial length of the color main body 10. It may be a wheel collar. However, the joint length L of these two different rubber ring receiving collars with the drain pipe (simply indicating the pipe) 8 must satisfy at least the standard value.
[0060]
Next, a spear-type joining member (also referred to as a single socket) 1A according to a second embodiment of the present invention will be described. In FIG. 3, this spear-type joining member 1A has a rubber ring receiving collar 2 slidably fitted on the connecting short pipe 3A on the upper and downstream sides of the drainage 15 described in FIG. In particular, the rubber ring receptacle color-2 satisfies the standard established by the Japan Sewerage Association, and the spear-type joint member 1A comprising the rubber ring receptacle color-2 is also the basis for establishing the standard. Satisfies the water-sealing properties, seizure-prevention properties, compatibility and versatility.
[0061]
The configuration, dimensions, water sealing, and the like of the rubber ring receiving collar 2 are omitted because they are the same as those on one side (left or right) of the spear-type joining member 1 of the first embodiment. Need to replenish.
[0062]
Further, the method of using the drainage basin 15 having the spear-type joining member 1A using the rubber ring receiving collar 2 has already been described with reference to FIG.
[0063]
The “characteristic portion” of the present invention will be described below.
[0064]
In the spear-type joining members 1 and 1A of these first and second embodiments, the following shaft centering portions 20 and 20A should be provided at the outer end of the rubber ring receiving collar 2 with a nominal diameter of 100 mmφ. For example, it protrudes in the axial direction so as to protrude from the product length S by about 5 to 10 mm.
[0065]
Accordingly, the shaft alignment portions 20 and 20A protrude from the product length S, that is, the tube length of the cut-off drain pipe portion (50A), so that the insertion pipe main body 3 and the drainage basin 15 are connected to the existing drain pipes 8 and 8 respectively. If it is interposed, it will be placed over the cut portion (52) of the drain pipe 8 slightly.
[0066]
That is, when this spliced joint member 1, 1 A is lowered and interposed in the direction of arrow a in FIGS. 4 and 5, the axial alignment portions 20, 20 A become the pipe end upper surface (outer surface) of the existing drainage pipe 8. ), The insertion pipe main body 3 and the connecting short pipe 19 of the drainage basin 15 are automatically adjusted without special adjustment while supporting the splicing type joining members 1 and 1A by hand. Axis alignment on the same straight line with the drain pipe 8 can be performed.
[0067]
Of course, since it is configured in the small piece axial alignment part (axial alignment small piece) 20 and 20A, the production cost and productivity can be made the same with a slight modification of the injection mold.
[0068]
The shaft centering portions 20, 20A will be described in further detail.
[0069]
The shaft centering portion 20 shown in FIG. 1 is formed in an arcuate saddle shape and protrudes outside the seal groove 9. Since the collar body 10 of the rubber ring receiving collar 2 is fitted on and slides on the outer peripheral surface of the insertion pipe body 3 or the existing drain pipe 8 having the same diameter, this arc-shaped saddle type shaft alignment section 20 is configured with the same inner and outer diameters (same thickness) as the collar body 10, and the inner surface of the tip thereof is formed into a slightly inclined trumpet shape so that the sliding of the rubber ring receiving collar 2 is obstructed. I am trying not to.
[0070]
Since this arc is placed on the existing drainage pipe 8, at least the maximum upper half of the color main body 10 (the upper half of the horizontal plane passing through the pipe axis, ie, the circumference 1/2) from the upper 1/4 circumference. Form.
[0071]
2 and 3 is formed in a claw shape and protrudes outside the seal groove 9. This claw-shaped shaft alignment portion 20A is divided into three to four claws by dividing the arc-shaped saddle-shaped one (20).
[0072]
Therefore, the protrusion length of the nail may be about 5 to 10 mm as described above, but the width of the nail is formed in a trapezoidal shape of about 12 mm at the base and about 8 mm at the tip.
[0073]
The claw-shaped shaft alignment portion 20A has the same ability to support the rubber ring receiving collar 2 as compared with the arcuate saddle type shaft alignment portion 20, but further hinders the sliding of the rubber ring receiving collar 2. Not give.
[0074]
The shaft alignment portions 20 and 20A are not limited to the spear-type joining members 1 and 1A of the first or second embodiment, but can be applied to WR of a general spear socket.
[0075]
Further, in the case of the spear-type joining member 1 of the first embodiment, if some workability is sacrificed, the shaft centering portion 20 may be provided only in one rubber ring receiving collar 2 and on the other side. May use a conventional rubber ring receiving collar 51a.
[0076]
【The invention's effect】
According to the first and second aspects of the present invention, since the shaft centering small piece is provided on the rubber ring receiving collar, the rubber ring receiving collar slides smoothly and does not damage the rubber ring. Impossible construction reliability can be obtained. In particular, since it is a small piece axial alignment part, the productivity and production cost are comparable to those of the prior art, and it is easy to perform repairs using a spear-type joining member or even in a narrow place in an expansion site.
[0077]
According to the invention of claim 3, since the stopper for retaining is provided between the rubber ring receiving collar and the insertion tube, the whole of the spear-type joining member has the standard value while simplifying the operation. It will be cleared, and even if it is not standardized, as a semi-standard product, sealability, seizure resistance due to earthquakes, compatibility and versatility can be guaranteed, and construction reliability can be improved.
[0078]
Further, according to the invention of claim 4, the handling of the relatively large drainage basin to be added, especially the alignment of the shaft center is easy, and the rubber ring is prevented from being damaged, and if it is damaged, the drainage basin itself is replaced. Including this, construction costs can be kept low and construction reliability can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an upper half along a tube axis and an outer view of a lower half according to a first embodiment of the present invention.
2A and 2B are main part views of FIG. 1, in which FIG. 1A is a partially cutaway front view, and FIG. 2B is a longitudinal sectional view along an axis.
FIG. 3 is a sectional view taken along the axis of the second embodiment of the present invention.
FIG. 4 is a diagram illustrating use of the first embodiment.
FIG. 5 is an explanatory diagram of the use of the second embodiment.
FIG. 6 is a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Spiral type joining member, 2 ... Rubber ring receiving collar, 3 ... Insertion pipe | tube main body, 6 ... Stopper C ring, 7 ... Stopper-groove, 20, 20A ... Shaft alignment part

Claims

A rubber ring receiving collar is slidably fitted into a short tube for connection, and is in a synthetic resin spear-type joining member used when connecting the short tube and an existing tube,
At the outer end of the rubber ring receiving collar on the existing tube side, an axial centering portion made of a small piece of arc-shaped saddle shape or arc-shaped claw that can be made by reworking a conventional molding die is projected in the axial direction. After the shaft centering portion was brought into contact with the outer surface of the existing pipe so that the tube shafts of both pipes were on the same straight line, the rubber ring receiving collar was supported. A synthetic resin spear-shaped joining member, which is slid by hand in a state where the shaft centering portion is in contact with the existing pipe side.

Two rubber ring receiving collars having substantially the same dimensions are fitted on the insertion tube, and are slid by the hand supporting the rubber ring receiving collar so that they are separated from each other and close to each other. In the synthetic resin spear-type joint member for drainage equipment so that it fits within the length of the insertion pipe when
In order to align the shafts of the insertion pipe and the existing drain pipe on the same straight line, both the rubber ring receiving collars or one of the outer ends of the separation side are reworked on a conventional molding die. Protrusively project so that the axial centering part consisting of a small piece of arcuate saddle or arcuate claw that can be extended in the axial direction, and the axial centering part abuts the upper and / or downstream drainage pipe outer surface. A synthetic resin spear-type joint member for drainage equipment, wherein the insertion pipe and the drain pipe are connected by sliding in a contacted state .

In the synthetic resin spear-type joint member in which the rubber ring receiving collar is slidably fitted in the insertion tube and stored.
By providing a stopper for retaining between the rubber ring receiving collar and the insertion tube, the rubber ring receiving collar can be used as a stopper when the rubber ring receiving collar slides. The joining length of the existing pipe to be inserted is matched with the standard value, and the tube axis of the insertion pipe and the existing pipe is collinear with the outer end of the rubber ring receiving collar on the existing pipe side. An axial centering portion consisting of a small piece of arc-shaped saddle shape or arc-shaped claw, which is formed in at least the maximum upper half that is possible by reworking a conventional molding die, is performed in the axial direction. It protrudes so that it protrudes, and it is made to slide to the existing pipe side by a hand supporting the rubber ring receiving collar in a state where the axial centering small piece is in contact with the outer surface of the existing pipe. Synthetic resin spear-type joining member.

Short pipes for connection are provided at the upper and downstream connection ports of the synthetic resin drainage for expansion, respectively, and rubber ring receiving collars are slidably fitted into these short pipes, and these are provided. When the length between the outer ends of the short pipe is the cut-out length of the existing drain pipe,
The rubber ring socket color - the drain pipe side outer edge, the order to perform axial centering of collinear to the tube axis of the short pipe and water discharge pipe, at least up to the possible with rework of the mold Projected to protrude in the axial direction, axially aligned portions made of arcuate saddle-shaped or arcuate claw pieces formed in half, and placed on the outer surface of the drain pipe Therefore, the hand that supported these rubber ring receiving collars was slid to the drainage pipe side while the shaft centering part was in contact with the drainage pipe. Resin spear-type joining member.