JP4312370B2

JP4312370B2 - Retrofit water stop ring

Info

Publication number: JP4312370B2
Application number: JP2000338535A
Authority: JP
Inventors: 賢司小林
Original assignee: 賢司小林
Priority date: 2000-11-07
Filing date: 2000-11-07
Publication date: 2009-08-12
Anticipated expiration: 2020-11-07
Also published as: JP2002138666A

Description

【０００１】
【発明の属する技術分野】
本発明は、型枠に取付けられたセパレータに後付けで取付けることができる後付け止水リングに関するものである。
【０００２】
【従来の技術】
従来、型枠を設置してコンクリート構造物を構築する際には、施工時においてコンクリート構造物外部、例えば地下工事を行う際の地中水、浄水場を建設する際の水槽の水等の水分がセパレータとコンクリートとの間に生じる間隙に進入し、セパレータとコンクリートとの間隙を水の流通経路としてコンクリート表面へ漏出することが問題となっている。この水分の漏れが生じると、コンクリート表面に付着した金属が腐食して変色しコンクリート構築物の美観が損なわれてしまう。
【０００３】
前記従来の課題を解決するための技術として、特開平９−２５６６３３号においてセパレータに対して後付け可能な止水板が開示されている。
【０００４】
【発明が解決しようとする課題】
しかしながら、前記特開平９−２５６６３３号に開示された止水板は、環状体が比較的柔らかいゴム素材により一体的に形成されているため、結合部を強く結合させることが難しく、施工時に結合部が外れてしまうという課題があり、更に環状体が水膨潤性ゴムの一体品で形成されていたため、水膨潤性ゴムが水分を吸収して膨潤した際に、止水板が全体的にねじれてセパレータと止水板との間に隙間が生じてしまうという課題があった。
【０００５】
本発明者は、前記課題を解決すべくなされたもので、セパレータへの後付けが可能で製造時の作業性を向上させて製造コストを低減することができ、保管性に優れると共に、コンクリート打設時における止水性に優れ、水漏れを確実に防止することができる後付け止水リングを提供しようとするものである。
【０００６】
【課題を解決するための手段】
本発明は、硬質合成樹脂により結合するとリング状となる２つの半環状体と、該半環状体の内周壁面に装着固定されるゴムまたは軟質合成樹脂より成る止水部材とにより構成され、
前記各半環状体は、２枚の半環状平板の内周端縁を半環状壁板の外周上・下端縁部に連結固定すると共に、前記半環状平板と半環状壁板の両端に、それぞれ基部側結合端面と先方側結合端面が突設して形成され、且つ前記半環状壁板の外周面と各半環状平板の内側面に格子状に形成された補強用リブを固定し、前記各半環状平板の外側面中央部付近には、前記止水部材の外周縁部に当接する半環状突起が突設され、更に前記各半環状体は、前記各基部側結合端面の端縁が薄肉部を介して開閉自在に結合連結され、且つ一方の半環状体の先方側結合端面の上下部に間隔を有して直角に突設された突出片の先端に抜止め用の係止部を連設し、且つ他方の半環状体の先方側結合端面の上下部に間隔を有し、前記各係止部を挿入係止する開口部を穿設して第１の結合部が形成されると共に、一方の半環状体の基部側結合端面と先方側結合端面の内方上下部に間隔を有して小円穴をそれぞれ凹設し、且つ他方の半環状体の基部側結合端面と先方側結合端面の内方上下部に間隔を有して前記各小円穴に圧入密嵌する小突起をそれぞれ突設して第２の結合部が構成され、更に前記各半環状体の半環状壁板の内面中央円周方向に凹溝が形成され、且つ該各半環状体の各基部側結合端面に前記凹溝に連なる小凹溝がそれぞれ形成されると共に、前記薄肉部の中央に前記小凹溝に連なって貫通孔が形成され、且つ他方の半環状体の先方側結合端面の各開口部間に前記凹溝に連なる小凹溝を設けて形成され、
前記止水部材は、セパレータの円柱棒の内径とほぼ同一の内径を有する凹部と、該凹部の両側に断端縁部を有する２個の半筒状板の外周中央に前記各半環状体の凹溝に嵌合する嵌合突条がそれぞれ円周方向に突設されると共に、前記各半筒状板の外周上・下端縁部に、前記各半環状体の各半環状平板の外側面内周縁部にその内側面が当接し、且つ前記半環状体突起にその外周縁部が当接する当接突起をそれぞれ円周方向に突設する一方、前記当接突起の前記凹部に連なる内側縁部に、該凹部よりやや小径の半環状肉厚部が一体に形成され、更に各半筒状板の内側面の各断端縁部の中央に前記半環状体の各小凹溝に嵌合する小巾の嵌合片が前記各嵌合突条に連なって連設され、且つ該嵌合片の中央部は前記貫通孔に嵌合係止できるよう凹状の折曲部を備える一方、他方の半環状体の先方側結合端面の凹溝に嵌合する嵌合舌片が、他方の半筒状板の外側面において嵌合突条に連なって突設して形成されるという手段を採用することにより、上記課題を解決した。
【０００７】
【発明の実施の形態】
本発明に係る後付け止水リングの実施の形態を図に基づいて詳細に説明する。図１は本発明に係る後付け止水リングを開いて示す斜視図、図２は同平面図、図３は図２の横断面図である。
【０００８】
本発明に係る止水リング１は、硬質合成樹脂により結合するとリング状となる２つの半環状体２と、該半環状体２の内周壁面に取付けられたゴムまたは軟質合成樹脂より成る止水部材３とにより構成されている。
【０００９】
本発明において、前記各半環状体２を構成する硬質合成樹脂は、特に限定する必要はないが、好ましくはポリプロピレン、ポリエチレン、ポリスチレン、ポリカーボネート、メタクリル樹脂、ポリアミド樹脂、ポリイミド樹脂、塩化ビニル樹脂、ＡＢＳ樹脂、アクリル樹脂等を用いることが推奨される。
【００１０】
前記各半環状体２は、２枚の半環状平板４の内周端縁を半環状壁板５の外周上・下端縁部にそれぞれ連結固定すると共に、前記半環状平板４と半環状壁板５の両端には、それぞれ基部側結合端面６と先方側結合端面７とが突設して形成され、更に前記半環状壁板５の外周面において、前記各半環状平板４の各対面する内側面間および前記基部側結合端面６と先方側結合端面７の各対面する内側面間には、該半環状平板４よりやや低い高さを有して格子状に形成された補強用リブ８が固定されている。また、前記各半環状平板４の各外側面の中央部付近には、前記止水部材３の外周縁部に当接して止水性を高める半環状突起９がそれぞれ突設されている。なお、該半環状突起９の内側壁面は内側方向へ傾斜した斜面９ａとすることが推奨される。
【００１１】
そして、前記各半環状体２は、各基部側結合端面６の端縁が薄肉部１０を介して開閉可能に接合連結され、且つ一方の半環状体２の先方側結合端面７の上下部に間隔を有して直角に突設された突出片１１の先端に抜止め用の係止部１２を連設し、且つ他方の半環状体２の先方側結合端面７の上下部に間隔を有して、前記各係止部１２を挿入係止する開口部１３を穿設して第１の結合部１４が構成されると共に、一方の半環状体２の基部側結合端面６と先方側結合端面７の内方上下部に間隔を有して小円穴１５をそれぞれ凹設し、且つ他方の半環状体２の基部側結合端面６と先方側結合端面７の内方上下部に間隔を有して、前記各小円穴１５に圧入密嵌する小突起１６をそれぞれ突設して第２の結合部１７が構成されている。
【００１２】
前記第１の結合部１４を構成する各突出片１１の先端には抜止め用の係止部１２がそれぞれ連設されており、該各突出片１１を前記各開口部１３に挿入した際には、この抜止め用の係止部１２が開口部１３の縁部に係止されると共に、前記第２の結合部１７を構成する各小突起１６が各小円穴１５内に圧入密嵌されて、各半環状体２は一体に結合固定されてリング状となる。そして、前記第１の結合部１４を介して各半環状体２を結合させると、抜止め用の係止部１２を強い力で内方向に押して突出片１１を相当量撓ませない限りは前記係止状態が外れることなく、各半環状体２の強固で確実な結合状態が得られる。
【００１３】
前記各半環状体２の半環状壁板５の内面中央円周方向には凹溝１８が形成され、且つ該各半環状体２の各基部側結合端面６に前記凹溝１８に連なる小凹溝１９がそれぞれ形成されると共に、前記薄肉部９の中央に前記小凹溝１９に連なって貫通孔２０が形成され、更に他方の半環状体２の先方側結合端面７の各開口部１３間に前記凹溝１８に連なる小凹溝２１が形成されている。
【００１４】
そして、前記各半環状体２に形成された凹溝１８、小凹溝１９・２１および貫通孔２０に止水部材３が挿着固定される。前記止水部材３は、ゴムまたは軟質合成樹脂により前記半環状体２の半環状壁板５の内周面に装着できるように形成されている。
【００１５】
前記止水部材３は、後述のセパレータ３１の円柱棒３３の内径とほぼ同一の内径を有する凹部２２と、該凹部２２の両側に断端縁部２３を有する２個の半筒状板２４の外周中央に、前記各半環状体２の凹溝１８に嵌合する嵌合突条２５がそれぞれ円周方向に突設されると共に、半筒状板２４の外周上・下端縁部に、前記各半環状体２の各半環状平板４の外側面内周縁部にその内側面が当接すると共に、前記半環状突起９にその外周縁部が当接する当接突起２６がそれぞれ円周方向に突設され、且つ前記当接突起２６の前記凹部２２に連なる内側縁部には、前記凹部２２よりはやや小径の半環状肉厚部２７が一体に形成され、更に各半筒状板２４の内側面の各断端縁部２３の中央に前記半環状体２の各小凹溝１９に嵌合する小巾の嵌合片２８が前記各嵌合突条２５に連なって連設され、且つ該嵌合片２８の中央部は前記貫通孔２０に嵌合係止できるよう凹状の折曲部２９を備える一方、他方の半環状体２の先方側結合端面７の小凹溝２１に嵌合する嵌合舌片３０が、他方の半筒状板２４の外側面において嵌合突条２５に連なって突設して形成されている。
【００１６】
前記止水部材３は、ゴムまたは軟質合成樹脂により形成されるが、その構成部材がゴムであるとき、クロロプレンゴム、スチレンブタジェンゴム等に高吸水性樹脂を含有させた水膨潤性ゴムが使用することが推奨される。
【００１７】
前記水膨潤性ゴムは、水分を含有したときに体積比で３〜８倍に膨潤するが、空気に含有される水分を吸収した程度では膨潤せず、コンクリート中ではコンクリートに含有される水分を吸収して膨張する。また、前記水膨潤性ゴムは、その他にも優れた耐候性、耐久性、耐熱性、圧縮還元性、衝撃吸収能を有し、物理的強度が高いといった特性を示している。
【００１８】
前記止水部材３を構成するゴムは、水膨潤性ゴムには必ずしも限定されず、天然ゴムや、シス−１、４−ポリイソプレン、シス−１、４−ポリブタジェン、スチレンブタジェンゴム（ＳＢＲ）、ブタジェンアクリロニトリルゴム（ＮＢＲ）等のブタジェン共重合物、クロロプレンゴム、イソブチレン・イソプレン共重合物、チオコール等の多硫化系合成ゴム、ポリエステルウレタン、ポリエーテルウレタン等のウレタンゴム、ポリジメチルシロキサン等の珪素ゴム、六フッ化プロピレン・フッ化ビニリデン共重合物等のフッ素ゴム、クロロスルホン化ポリエチレン、ポリアクリル酸エステル、アクリロニトリル共重合物、エチレンプロピレンゴム、ジシクロペンタジェン、１、４−ヘキサジェン、エチリデンノルボルネン等を硫黄加硫成型を容易にするために共重合したＥＰＴゴム等の各種ゴムがいずれも好適に使用できる。
【００１９】
また、前記止水部材３を構成するゴムの代りに軟質合成樹脂を使用してもよい。この場合、軟質合成樹脂の種類は、半環状体２を構成する軟質合成樹脂よりも硬度が低いものであれば特に限定はされず、シリコーン樹脂、塩化ビニル樹脂、フッ素樹脂、塩化ビニリデン樹脂等を好適な例として挙げることができる。
【００２０】
前記構成より成る止水部材３は、各半筒状板２４の外周に突設された各嵌合突条２５を各半環状体２の各凹溝１８にそれぞれ嵌合装着し、且つ各当接突起２６の内側面を各半環状平板４の外側面内周縁部に当接すると共に、前記各当接突起２６の外周縁部を半環状突起９の内側壁面に当接し、更に小巾の嵌合片２８を前記半環状体２の各小凹溝１９に嵌合すると共に、折曲部２９を貫通孔２０に嵌合係止し、且つ嵌合舌片３０を小凹溝２１に嵌合することにより、各半環状体２に装着固定して、止水リング１を形成する。
【００２１】
前記構成を有する止水リング１は、例えば図７に示すようにコンクリート打設用セパレータに取付けて使用する。セパレータ３１は、両端に螺条部３２が形成された金属製の円柱棒３３と、該円柱棒３３の中途部に取付けられた二つのカップ３４とから構成されており、止水リング１は各半環状体２を開いて円柱棒３３を差し入れた後、該半環状体２を閉じて結合固定することによってセパレータ３１に取付けられる。すなわち、図８に示すように各半環状体２で円柱棒３３を挟むようにして、前記薄肉部１０を介して前記各半環状体２を閉じて、該各半環状体２の各基部側結合端面６および各先方側結合端面７を圧着させて、第１の結合部１４の各突出片１１の先端の各係止部１２を各開口部１３に挿入係止すると共に、第２結合部１７の各小突起１６を各小円穴１５に圧入密嵌すると、前記各係止部１２により前記各突出片１１は各開口部１３より抜け去ることなく、各半環状体２は前記円柱棒３３を挟着して一体に固定されて、止水リング１はセパレータ３１に取付けられる。
【００２２】
図８に示すように、前記止水リング１がセパレータ３１に圧着して取付けられると、止水部材３の各半筒状板２４の両側に位置する各断端縁部２３が互いに圧着すると共に、嵌合片２８も２つ折りに重合され、且つ嵌合舌片３０が前記各突出部１１間の他方側結合端面７に圧着して、各半筒状板２４は密に重合固定され、更に前記各当接突起２６の外周縁部が各半環状突起９の内側壁面に当接すると共に、前記当接突起２６の内側縁部に設けられた凹部２２より小径の半環状肉厚部２７が円柱棒３３に強く圧着して止水効果が高められ、セパレータ３１の取付け部から水漏れすることがない。
【００２３】
そして、前記止水リング１およびセパレータ３１を使用したコンクリート構造物の構築方法の一例を図９に基づいて説明する。先ず、組立て構築された桟木３５の内壁に型枠３６を設置し、該型枠３６にセパレータ３１を設置する。そして、前記セパレータ３１の両端の螺条部３２にナット３７を取付け、前記型枠３６をセパレータ３１で固定する。次いで、２個の止水リング１をセパレータ３１の円柱棒３３の各カップ３４の近傍に前記した方法で取付け、型枠３６内にコンクリート３８を流し込む。そして、前記コンクリート３８が硬化すると、ナット３７をセパレータ３１の螺条部３２から取外し、その後に桟木３５および型枠３６を取外してコンクリートの構築作業を完了する。
【００２４】
前記止水リング１を構成する止水部材３の素材として水膨潤性ゴムを用いると、コンクリート３８を流し込んだ際に、該コンクリート３８に含有される水分によって水膨潤性ゴムが膨潤し、止水リング１の止水部材３と円柱棒３３との間隙を埋めるので、より確実に水分の流通経路を遮断することができる。更に、抜止め用の係止部１２によって第１の結合部１４が強固に保持されると共に、小突起１６および小円穴１５によって第２の結合部１７が前記第１の結合部１４の補助的な役目を果たすため、施工時に止水リング１が円柱棒３３から離脱する虞れがない。
【００２５】
なお、本発明に係る止水リング１の使用形態は図９のものには限定されず、ビルの壁面、天井、床、屋根等の構築、あるいはトンネル、上・下水道等の地下構造物等、種々のコンクリート構造物の構築に幅広く使用することが可能である。
【００２６】
【発明の効果】
本発明は上述のようであるから、止水リングは開閉可能な結合部を備えているので、コンクリート打設用セパレータへの後付けが可能であり、従ってセパレータの製造時の作業性を向上させ、製造コストを低減することができると共に、保管性に優れており、且つ止水リングは内周面にセパレータの円柱棒に密接して挟着するゴムまたは軟質合成樹脂製の止水部材が取付けられているため、セパレータ取付け部からの水漏れを確実に防止することができ、更に止水リングは一旦セパレータの円柱棒に取付けられると離脱する虞れはない。
【図面の簡単な説明】
【図１】本発明後付け止水リングを開いて示す斜視図である。
【図２】本発明後付け止水リングの平面図である。
【図３】図２の横断面図である。
【図４】本発明後付け止水リングを構成する各半環状体を開いて示す斜視図である。
【図５】本発明後付け止水リングを構成する止水部材の表面側斜視図である。
【図６】本発明後付け止水リングを構成する止水部材の背面側斜視図である。
【図７】本発明後付け止水リングをコンクリート打設用セパレータに取付けた状態を示す斜視図である。
【図８】本発明後付け止水リングをコンクリート打設用セパレータに取付けた状態を示す縦断面図である。
【図９】本発明後付け止水リングを使用したコンクリート構造物の構築方法の一例を示す部分断面図である。
【符号の説明】
１止水リング、２半環状体、３止水部材、４半環状平板、５半環状壁板、６基部側結合端面、７先方側結合端面、８補強用リブ、９半環状突起、９ａ斜面、１０薄肉部、１１突出片、１２係止部、１３開口部、１４第１の結合部、１５小円穴、１６小突起、１７第２の結合部、１８凹溝、１９小凹溝、２０貫通孔、２１小凹溝、２２凹部、２３断端縁部、２４半筒状板、２５嵌合突条、２６当接突起、２７半環状肉厚部、２８嵌合片、２９折曲部、３０嵌合舌片。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a post-water-stop ring that can be retrofitted to a separator attached to a mold.
[0002]
[Prior art]
Conventionally, when constructing a concrete structure by installing a formwork, moisture such as underground water during underground construction, for example, underground water when performing underground construction, aquarium water when constructing a water purification plant, etc. Enters the gap formed between the separator and the concrete, and the gap between the separator and the concrete leaks to the concrete surface as a water flow path. When this moisture leakage occurs, the metal adhering to the concrete surface corrodes and discolors, and the aesthetic appearance of the concrete structure is impaired.
[0003]
As a technique for solving the conventional problems, JP-A-9-256633 discloses a water stop plate that can be retrofitted to a separator.
[0004]
[Problems to be solved by the invention]
However, the water stop plate disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 9-256633 is difficult to strongly bond the coupling portion because the annular body is integrally formed of a relatively soft rubber material. Since the annular body was formed of an integral product of water-swellable rubber, when the water-swellable rubber absorbs moisture and swells, the water stop plate is twisted as a whole. There was a problem that a gap was generated between the separator and the water stop plate.
[0005]
The present inventor has been made to solve the above-mentioned problems, can be retrofitted to a separator, can improve the workability at the time of production, reduce the production cost, is excellent in storability, and placed in concrete. It is an object of the present invention to provide a retrofit water stop ring that is excellent in water stoppage at times and can reliably prevent water leakage.
[0006]
[Means for Solving the Problems]
The present invention is composed of two semi-annular bodies that are ring-shaped when combined with a hard synthetic resin, and a water stop member made of rubber or soft synthetic resin that is attached and fixed to the inner peripheral wall surface of the semi-annular body,
Each semi-annular body connects and fixes the inner peripheral edge of two semi-annular flat plates to the upper and lower edges of the outer periphery of the semi-annular wall plate, and at both ends of the semi-annular flat plate and the semi-annular wall plate, respectively. A reinforcing rib formed in a lattice shape on the outer peripheral surface of the semi-annular wall plate and the inner side surface of each semi-annular flat plate is formed by projecting a base-side coupling end surface and a front-side coupling end surface, and Near the center of the outer surface of the semi-annular flat plate, a semi-annular protrusion that abuts on the outer peripheral edge of the water stop member protrudes, and each semi-annular body has a thin edge at the base side coupling end surface. A locking part for retaining is provided at the tip of a projecting piece that is connected to be openable and closable through the part and is projected at a right angle with a space above and below the front side coupling end surface of one semi-annular body. Connected and provided with openings at the upper and lower parts of the front side coupling end surface of the other semi-annular body, and an opening for inserting and locking each of the locking portions is provided. A first coupling portion is formed, and small circular holes are respectively provided in the semi-annular body with a gap in the upper and lower portions of the base side coupling end surface and the front side coupling end surface. The second coupling portion is configured by projecting small projections that are press-fitted into the small circular holes with a space between the upper and lower portions of the base-side coupling end surface and the front-side coupling end surface of the semi-annular body. Further, a concave groove is formed in the circumferential direction of the inner surface of the semi-annular wall plate of each semi-annular body, and a small concave groove connected to the concave groove is formed on each base side coupling end surface of each semi-annular body. In addition, a through-hole is formed in the center of the thin-walled portion so as to be continuous with the small-groove groove, and a small-groove groove that is continuous with the groove is provided between the openings on the front-side coupling end surface of the other semi-annular body. Formed,
The water stop member includes a concave portion having an inner diameter substantially the same as an inner diameter of a columnar rod of the separator, and two semi-cylindrical plates having end edges on both sides of the concave portion. The fitting ridges to be fitted into the concave grooves are respectively provided in the circumferential direction, and the outer surface of each semi-annular flat plate of each of the semi-annular bodies on the upper and lower edges of the outer circumference of each semi-cylindrical plate. While the inner peripheral surface is in contact with the inner peripheral surface and the semi-annular protrusion is in contact with the outer peripheral edge of the outer peripheral edge, the inner protrusion is provided in the circumferential direction, and the inner edge of the contact protrusion is continuous with the recess. A semi-annular thicker portion having a slightly smaller diameter than the concave portion is integrally formed in the portion, and further fitted into each small concave groove of the semi-annular body at the center of each stump edge portion of the inner side surface of each semi-cylindrical plate A small-sized fitting piece is connected to each of the fitting protrusions, and the center portion of the fitting piece is a concave fold so that it can be fitted and locked in the through hole. A fitting tongue piece that fits into the groove on the front side coupling end surface of the other semi-annular body is formed by projecting from the fitting protrusion on the outer surface of the other semi-cylindrical plate. The above-mentioned problem has been solved by adopting the means of being performed.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a post-water-stop ring according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an open water-stop ring according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a cross-sectional view of FIG.
[0008]
The water-stop ring 1 according to the present invention includes two semi-annular bodies 2 that are ring-shaped when combined with a hard synthetic resin, and a water-stop ring made of rubber or soft synthetic resin attached to the inner peripheral wall surface of the semi-annular body 2. It is comprised by the member 3.
[0009]
In the present invention, the hard synthetic resin constituting each semi-annular body 2 is not particularly limited, but preferably, polypropylene, polyethylene, polystyrene, polycarbonate, methacrylic resin, polyamide resin, polyimide resin, vinyl chloride resin, ABS. It is recommended to use resin, acrylic resin or the like.
[0010]
Each semi-annular body 2 connects and fixes the inner peripheral edge of the two semi-annular flat plates 4 to the outer peripheral upper and lower end edges of the semi-annular wall plate 5, and the semi-annular flat plate 4 and the semi-annular wall plate. 5, a base-side coupling end surface 6 and a front-side coupling end surface 7 are formed so as to project from each other. Further, on the outer peripheral surface of the semi-annular wall plate 5, the inner surfaces of the semi-annular flat plates 4 facing each other. Reinforcing ribs 8 formed in a lattice shape with a slightly lower height than the semi-annular flat plate 4 are provided between the side surfaces and between the facing inner side surfaces of the base side coupling end surface 6 and the front side coupling end surface 7. It is fixed. Further, in the vicinity of the center portion of each outer side surface of each semi-annular flat plate 4, a semi-annular protrusion 9 is provided so as to abut on the outer peripheral edge of the water-stop member 3 and increase the water stop. It is recommended that the inner wall surface of the semi-annular protrusion 9 be a slope 9a inclined inward.
[0011]
Each semi-annular body 2 is connected to the end of each base-side coupling end surface 6 via a thin portion 10 so as to be openable and closable, and on the upper and lower portions of the front-side coupling end surface 7 of one semi-annular body 2. A locking portion 12 for retaining is connected to the tip of the protruding piece 11 projecting at right angles with an interval, and there is an interval between the upper and lower portions of the front-side coupling end surface 7 of the other semi-annular body 2. Then, an opening 13 for inserting and locking the respective locking portions 12 is formed to form a first coupling portion 14, and the base-side coupling end face 6 of one semi-annular body 2 and the front-side coupling The small circular holes 15 are recessed in the inner upper and lower portions of the end surface 7 with a space between them, and the base side coupling end surface 6 of the other semi-annular body 2 and the inner upper and lower portions of the front side coupling end surface 7 are spaced apart. The second coupling portion 17 is configured by projecting small projections 16 that are press-fitted into the small circular holes 15.
[0012]
A locking portion 12 for retaining is connected to the tip of each protruding piece 11 constituting the first coupling portion 14, and when the protruding piece 11 is inserted into each opening 13. The retaining portion 12 for retaining the retaining portion is latched to the edge portion of the opening 13, and each small projection 16 constituting the second coupling portion 17 is press-fitted and fitted into each small circular hole 15. Thus, each semi-annular body 2 is integrally coupled and fixed into a ring shape. Then, when each semi-annular body 2 is coupled via the first coupling portion 14, unless the locking portion 12 for retaining is pushed inward with a strong force and the protruding piece 11 is deflected by a considerable amount, A strong and reliable combined state of each semi-annular body 2 can be obtained without releasing the locked state.
[0013]
A concave groove 18 is formed in the inner circumferential direction of the inner surface of the semi-annular wall plate 5 of each semi-annular body 2, and a small groove connected to the concave groove 18 on each base-side coupling end surface 6 of each semi-annular body 2. Each of the grooves 19 is formed, and a through hole 20 is formed in the center of the thin-walled portion 9 so as to be connected to the small concave groove 19. Further, between the openings 13 on the front side coupling end surface 7 of the other semi-annular body 2. In addition, a small groove 21 that is continuous with the groove 18 is formed.
[0014]
And the water stop member 3 is inserted and fixed to the concave groove 18, the small concave grooves 19 and 21 and the through hole 20 formed in each semi-annular body 2. The water stop member 3 is formed by rubber or soft synthetic resin so that it can be attached to the inner peripheral surface of the semi-annular wall plate 5 of the semi-annular body 2.
[0015]
The water-stop member 3 includes a recess 22 having an inner diameter substantially the same as an inner diameter of a cylindrical bar 33 of a separator 31 described later, and two half-cylinder plates 24 having stump edges 23 on both sides of the recess 22. In the center of the outer periphery, fitting protrusions 25 that fit into the concave grooves 18 of the respective semi-annular bodies 2 are respectively provided so as to protrude in the circumferential direction, and at the upper and lower edges of the outer periphery of the semi-cylindrical plate 24, The inner surface abuts on the outer peripheral edge of each semi-annular flat plate 4 of each semi-annular body 2, and the abutting protrusion 26 whose outer peripheral edge abuts on the semi-annular protrusion 9 projects in the circumferential direction. A semi-annular thick portion 27 having a slightly smaller diameter than that of the concave portion 22 is integrally formed at an inner edge portion of the contact projection 26 that is continuous with the concave portion 22. A small fitting piece 28 fitted into each small concave groove 19 of the semi-annular body 2 is provided at the center of each side edge 23. The center portion of the fitting piece 28 is provided with a concave bent portion 29 so that it can be fitted and locked to the through-hole 20, while the other semi-annular body is provided continuously with the fitting protrusions 25. The fitting tongue piece 30 which fits into the small concave groove 21 of the two front side coupling end faces 7 is formed to project from the fitting protrusion 25 on the outer surface of the other semi-cylindrical plate 24. .
[0016]
The water-stop member 3 is formed of rubber or a soft synthetic resin. When the constituent member is rubber, a water-swellable rubber containing a highly water-absorbing resin in chloroprene rubber, styrene butadiene rubber or the like is used. It is recommended to do.
[0017]
The water-swellable rubber swells 3 to 8 times in volume ratio when it contains moisture, but does not swell when it absorbs moisture contained in air, and in concrete it contains moisture contained in concrete. Absorbs and expands. In addition, the water-swellable rubber has other properties such as excellent weather resistance, durability, heat resistance, compression-reduction properties, impact absorption capability, and high physical strength.
[0018]
The rubber constituting the water-stopping member 3 is not necessarily limited to the water-swellable rubber, but is natural rubber, cis-1,4-polyisoprene, cis-1,4-polybutadiene, styrene butadiene rubber (SBR). Butadiene copolymer such as butadiene acrylonitrile rubber (NBR), chloroprene rubber, isobutylene / isoprene copolymer, polysulfide-based synthetic rubber such as thiocol, urethane rubber such as polyester urethane and polyether urethane, polydimethylsiloxane, etc. Silicon rubber, fluorine rubber such as propylene hexafluoride / vinylidene fluoride copolymer, chlorosulfonated polyethylene, polyacrylate ester, acrylonitrile copolymer, ethylene propylene rubber, dicyclopentagen, 1,4-hexagen, ethylidene Sulfur vulcanization molding of norbornene, etc. Various rubbers EPT rubber copolymerized in order to easily have both can be suitably used.
[0019]
A soft synthetic resin may be used in place of the rubber constituting the water stop member 3. In this case, the type of the soft synthetic resin is not particularly limited as long as it has a lower hardness than the soft synthetic resin constituting the semi-annular body 2, and includes silicone resin, vinyl chloride resin, fluororesin, vinylidene chloride resin, and the like. It can be mentioned as a suitable example.
[0020]
The water stop member 3 having the above-described configuration is configured such that the fitting protrusions 25 projecting from the outer periphery of the semi-cylindrical plates 24 are fitted and mounted in the concave grooves 18 of the semi-annular bodies 2, respectively. The inner surface of the contact protrusion 26 is in contact with the inner peripheral edge of the outer surface of each semi-annular flat plate 4, and the outer peripheral edge of each of the contact protrusions 26 is in contact with the inner wall surface of the semi-annular protrusion 9. The fitting piece 28 is fitted in each small groove 19 of the semi-annular body 2, the bent portion 29 is fitted and locked in the through hole 20, and the fitting tongue piece 30 is fitted in the small groove 21. By doing so, the water stop ring 1 is formed by being attached and fixed to each semi-annular body 2.
[0021]
The water stop ring 1 having the above-described configuration is used by being attached to a concrete casting separator as shown in FIG. 7, for example. The separator 31 is composed of a metal cylindrical rod 33 having threaded portions 32 formed at both ends, and two cups 34 attached to the middle portion of the cylindrical rod 33. After the semi-annular body 2 is opened and the cylindrical rod 33 is inserted, the semi-annular body 2 is closed and coupled and fixed to the separator 31. That is, as shown in FIG. 8, each semi-annular body 2 is sandwiched between the semi-annular bodies 2 with the cylindrical rods 33 being sandwiched therebetween, and the respective semi-annular bodies 2 are closed via the thin-walled portions 10. 6 and the respective front-side coupling end surfaces 7 are pressure-bonded, and the respective locking portions 12 at the tips of the respective projecting pieces 11 of the first coupling portion 14 are inserted and locked into the respective openings 13, and the second coupling portion 17 When each small protrusion 16 is press-fitted and fitted into each small circular hole 15, each projecting piece 11 does not come off from each opening 13 by each locking portion 12, and each semi-annular body 2 holds the cylindrical bar 33. The water stop ring 1 is attached to the separator 31 by being sandwiched and fixed integrally.
[0022]
As shown in FIG. 8, when the water stop ring 1 is attached to the separator 31 by being crimped, the stump edges 23 located on both sides of each semi-cylindrical plate 24 of the water stop member 3 are crimped to each other. The fitting piece 28 is also folded in half, and the fitting tongue piece 30 is crimped to the other coupling end face 7 between the projecting portions 11, so that each semi-cylindrical plate 24 is tightly superposed and fixed. The outer peripheral edge portion of each contact protrusion 26 contacts the inner wall surface of each semi-annular protrusion 9, and the semi-annular thick portion 27 having a smaller diameter than the recess 22 provided on the inner edge of the contact protrusion 26 is a cylinder. The water-stopping effect is enhanced by strongly pressing the rod 33, and water does not leak from the attachment portion of the separator 31.
[0023]
And an example of the construction method of the concrete structure using the said water stop ring 1 and the separator 31 is demonstrated based on FIG. First, the formwork 36 is installed on the inner wall of the assembled pier 35 and the separator 31 is installed on the formwork 36. Then, nuts 37 are attached to the screw portions 32 at both ends of the separator 31, and the mold 36 is fixed by the separator 31. Next, the two water-stop rings 1 are attached in the vicinity of the cups 34 of the columnar rod 33 of the separator 31 by the method described above, and the concrete 38 is poured into the mold 36. When the concrete 38 is hardened, the nut 37 is removed from the threaded portion 32 of the separator 31, and then the pier 35 and the formwork 36 are removed to complete the concrete construction work.
[0024]
When water-swellable rubber is used as a material for the water-stopping member 3 constituting the water-stop ring 1, the water-swellable rubber swells due to moisture contained in the concrete 38 when the concrete 38 is poured into the water-stopping ring 1. Since the gap between the water stop member 3 of the ring 1 and the cylindrical rod 33 is filled, the water flow path can be more reliably blocked. Further, the first coupling portion 14 is firmly held by the locking portion 12 for retaining, and the second coupling portion 17 assists the first coupling portion 14 by the small protrusion 16 and the small circular hole 15. Therefore, there is no possibility that the water stop ring 1 is detached from the cylindrical rod 33 during construction.
[0025]
In addition, the usage form of the water stop ring 1 according to the present invention is not limited to that of FIG. 9, construction of building walls, ceilings, floors, roofs, etc., or underground structures such as tunnels, water and sewers, etc. It can be used widely for the construction of various concrete structures.
[0026]
【The invention's effect】
Since the present invention is as described above, the water-stop ring has a joint that can be opened and closed, so that it can be retrofitted to the concrete casting separator, thus improving the workability during the production of the separator, The manufacturing cost can be reduced, and it is excellent in storability, and the water stop ring is attached with a water stop member made of rubber or soft synthetic resin that is closely attached to the cylindrical rod of the separator on the inner peripheral surface. Therefore, it is possible to reliably prevent water leakage from the separator mounting portion, and there is no possibility that the water stop ring is detached once it is attached to the cylindrical rod of the separator.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an open water-stop ring of the present invention opened.
FIG. 2 is a plan view of a post-water-stop ring of the present invention.
3 is a cross-sectional view of FIG.
FIG. 4 is a perspective view showing each semi-annular body constituting the post-water-stop ring of the present invention opened.
FIG. 5 is a front-side perspective view of a water-stopping member constituting the post-water-stop ring of the present invention.
FIG. 6 is a rear perspective view of a water stop member constituting the post-water stop ring of the present invention.
FIG. 7 is a perspective view showing a state in which the post-water-stop ring of the present invention is attached to a concrete casting separator.
FIG. 8 is a longitudinal sectional view showing a state in which the post-water-stop ring of the present invention is attached to a concrete casting separator.
FIG. 9 is a partial cross-sectional view showing an example of a method for constructing a concrete structure using the post-water-stop ring of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water stop ring, 2 Semi-annular body, 3 Water stop member, 4 Semi-annular flat plate, 5 Semi-annular wall plate, 6 Base side coupling end surface, 7 Front side coupling end surface, 8 Reinforcing rib, 9 Semi-annular protrusion, 9a Slope , 10 thin-walled portion, 11 projecting piece, 12 locking portion, 13 opening portion, 14 first coupling portion, 15 small circular hole, 16 small protrusion, 17 second coupling portion, 18 concave groove, 19 small concave groove, 20 through hole, 21 small groove, 22 recess, 23 cut edge, 24 semi-cylindrical plate, 25 fitting protrusion, 26 abutting protrusion, 27 semi-annular thick part, 28 fitting piece, 29 bent Part, 30 mating tongue.

Claims

The water-stop ring is composed of two semi-annular bodies that are ring-shaped when combined with a hard synthetic resin, and a water-stop member made of rubber or soft synthetic resin that is attached and fixed to the inner peripheral wall surface of the semi-annular body,
Each semi-annular body connects and fixes the inner peripheral edge of two semi-annular flat plates to the upper and lower edges of the outer periphery of the semi-annular wall plate, and at both ends of the semi-annular flat plate and the semi-annular wall plate, respectively. A reinforcing rib formed in a lattice shape on the outer peripheral surface of the semi-annular wall plate and the inner side surface of each semi-annular flat plate is formed by projecting a base-side coupling end surface and a front-side coupling end surface, and Near the center of the outer surface of the semi-annular flat plate, a semi-annular protrusion that abuts on the outer peripheral edge of the water stop member protrudes, and each semi-annular body has a thin edge at the base side coupling end surface. A locking part for retaining is provided at the tip of a projecting piece that is connected to be openable and closable through the part and is projected at a right angle with a space above and below the front side coupling end surface of one semi-annular body. Connected and provided with openings at the upper and lower parts of the front side coupling end surface of the other semi-annular body, and an opening for inserting and locking each of the locking portions is provided. A first coupling portion is formed, and small circular holes are respectively provided in the semi-annular body with a gap in the upper and lower portions of the base side coupling end surface and the front side coupling end surface. The second coupling portion is configured by projecting small projections that are press-fitted into the small circular holes with a space between the upper and lower portions of the base-side coupling end surface and the front-side coupling end surface of the semi-annular body. Further, a concave groove is formed in the circumferential direction of the inner surface of the semi-annular wall plate of each semi-annular body, and a small concave groove connected to the concave groove is formed on each base side coupling end surface of each semi-annular body. In addition, a through-hole is formed in the center of the thin-walled portion so as to be continuous with the small-groove groove, and a small-groove groove that is continuous with the groove is provided between the openings on the front-side coupling end surface of the other semi-annular body. Formed,
The water stop member includes a concave portion having an inner diameter substantially the same as an inner diameter of a columnar rod of the separator, and two semi-cylindrical plates having end edges on both sides of the concave portion. The fitting ridges to be fitted into the concave grooves are respectively provided in the circumferential direction, and the outer surface of each semi-annular flat plate of each of the semi-annular bodies on the upper and lower edges of the outer circumference of each semi-cylindrical plate. While the inner peripheral surface is in contact with the inner peripheral surface and the semi-annular protrusion is in contact with the outer peripheral edge of the outer peripheral edge, the inner protrusion is provided in the circumferential direction, and the inner edge of the contact protrusion is continuous with the recess. A semi-annular thicker portion having a slightly smaller diameter than the concave portion is integrally formed in the portion, and further fitted into each small concave groove of the semi-annular body at the center of each stump edge portion of the inner side surface of each semi-cylindrical plate A small-sized fitting piece is connected to each of the fitting protrusions, and the center portion of the fitting piece is a concave fold so that it can be fitted and locked in the through hole. A fitting tongue piece that fits into the groove on the front side coupling end surface of the other semi-annular body is formed by projecting from the fitting protrusion on the outer surface of the other semi-cylindrical plate. A water stop ring that is attached later.

The post-water-stop ring according to claim 1, wherein the rubber constituting the water-stop ring is a water-swellable rubber.