JP4589195B2 - Pipe connecting joint device and connection structure - Google Patents
Pipe connecting joint device and connection structure Download PDFInfo
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Description
本発明は、本管の削孔部に枝管を接続するための継手装置及び本管と枝管と継手装置とを具える接続構造に関し、特に、地下に埋設される雨水管や汚水管等において本管と枝管の接続の際に使用される継手装置に関する。特に本発明は、大口径の本管と枝管との接続に関するものである。 The present invention relates to a joint device for connecting a branch pipe to a drilling portion of a main pipe, and a connection structure including the main pipe, a branch pipe, and a joint device, particularly in a rainwater pipe or a sewage pipe buried underground. The present invention relates to a joint device used in connecting a main pipe and a branch pipe. In particular, the present invention relates to a connection between a main pipe having a large diameter and a branch pipe.
従来、本管と枝管の接続に対しては、コンクリートを打設し巻き立てる工法が行われていた。しかし、この工法では、地盤沈下や地震等の地盤の歪で、本管と枝管の相対的位置が変位すると、コンクリート巻き立て部がひび割れしたり破壊されたりして、不明水の浸入や下水の漏水等が発生する欠点があった。 Conventionally, for connecting the main pipe and the branch pipe, a method of placing concrete and winding it up has been performed. However, in this construction method, if the relative position of the main pipe and branch pipe is displaced due to ground subsidence or earthquake distortion, the concrete winding part will be cracked or destroyed, leading to unknown water intrusion or sewerage. There was a defect that water leakage occurred.
最近では、枝管と本管の相対的位置が変位しても、変位を吸収し、止水性も維持できるゴム製可とう継手が提案されている。しかし、枝管の取り付け角度が垂直又は急角度の場合は、枝管に、土圧による荷重、車輌による活荷重、地震又は地盤の変位による荷重がかかり、枝管が本管に押込まれ、本管の流れが阻害される危険性がある。この押込み荷重対策としての提案がされている(例えば、特許文献1及び2参照)。
Recently, even when the relative positions of the branch pipe and the main pipe are displaced, rubber flexible joints have been proposed that can absorb the displacement and maintain the water stoppage. However, when the mounting angle of the branch pipe is vertical or steep, the branch pipe is subjected to a load due to earth pressure, a live load from the vehicle, a load due to an earthquake or ground displacement, and the branch pipe is pushed into the main pipe. There is a risk of obstructing the flow of the tube. Proposals have been made as countermeasures against this indentation load (see, for example,
特許文献1及び2のものを、図11及び12を参照して説明する。図11及び12は従来の本管と枝管の接続構造を示す縦断面図である。特許文献1のものは、図11に示すように、下水本管101の取付穴101Aに取付管102を接続する構造であって、受口103と可とう性の連結管104と脚体105とからなり、受口103が、取付管102の下端102Aとの嵌合部103Aと、取付穴101Aとの連結部103Bとを有し、可とう性の連結管104が、受口103の連結部103Bと取付穴101Aとを連結し、脚体105が、受口103の外周と下水本管101の外面との間に介装されて受口103に加わる荷重を受け持つことを特徴とする下水本管と取付管の接続構造である。
The thing of
かかる提案は、取付管に突き出し荷重が加わっても、取付管の下端が下水本管内に突き出すことを確実に防止し、下水の流れを長期間に渡って円滑に維持できるというものである。 Such a proposal is to reliably prevent the lower end of the mounting pipe from protruding into the sewage main pipe even when a protruding load is applied to the mounting pipe, and to maintain the sewage flow smoothly over a long period of time.
特許文献2のものは、図12に示すように、本管201に取付管202等を接続するもので、本管201の取付口201Aに支管203を位置保持する複数の脚部204と、取付口201Aと支管203の隙間205に備わる接合剤206とを特徴とし、支管203の上端開口部203Aに筒状ゴム継手207を介して取付管202が接続されている例が示されている。かかる提案では、取付管と支管との変位はゴム継手により吸収することができる。
特許文献1のものは、構造が複雑で、コスト高となり、またゴム製の連結管は脚体で固定される受口と連結されているため、止水性は有するものの、取付管の変位に対する追従性がほとんどない欠点がある。
特許文献2のものは、取付管と支管との変位はゴム継手により吸収することができるが、本管と支管の接続は無収縮性モルタルやエポキシ系接着剤等で剛接合となっており、地震や地盤変位により支管に変位が生じると、接合部が破壊され、地下水・土砂等が侵入する欠点がある。
In the case of
本発明は、上述の問題点を解決するために考案されたものであり、本発明の課題は、枝管の本管への押込みが防止でき、枝管に変位が生じても可とう性及び止水性が十分に発揮できる継手装置及び接続構造を提供することである。 The present invention has been devised in order to solve the above-described problems. The object of the present invention is to prevent the branch pipe from being pushed into the main pipe and to be flexible even if the branch pipe is displaced. It is to provide a joint device and a connection structure that can sufficiently exhibit water-stopping properties.
本発明は、本管の削孔部に枝管を接続するための継手装置であって、可とう性の止水継手部材と管受け部材とを具え、前記止水継手部材が、枝管を挿入され枝管の外周面に固定される筒状部と、本管の削孔部周辺を外側から覆い固定される鍔部と、前記筒状部及び前記鍔部の間を繋ぐ連結部とを具え、前記管受け部材が、本管の削孔部に取り付けられる複数の支持体と、前記各支持体で支持され枝管を傾動及び側方移動の少なくとも1方が可能なように受ける枝管受とを具え、前記支持体が溝部を有し、前記枝管受が環状部材からなり、前記環状部材が、枝管の端部を支持する内側突出部と、前記支持体の溝部に遊嵌される外側突出部とを具えることを特徴とする継手装置に係るものである。
また、本発明は、本管と枝管と継手装置とを具え、前記継手装置を介して前記本管の削孔部に前記枝管が接続される接続構造であって、継手装置が可とう性の止水継手部材と管受け部材とを具えており、前記止水継手部材が、筒状部と、鍔部と、前記筒状部及び前記鍔部の間を繋ぐ連結部とを具え、前記管受け部材が、複数の支持体と、可動性の枝管受とを具え、前記止水継手部材の前記筒状部内に前記枝管が挿入されており、前記筒状部の少なくとも1部が前記枝管の外周面に固定されており、前記止水継手部材の鍔部が前記本管の削孔部周辺を外側から覆って固定されており、前記管受け部材の各支持体が前記本管の削孔部に取り付けられており、前記各支持体が前記管受け部材の枝管受を支持しており、前記枝管受が前記枝管を傾動及び側方移動の少なくとも1方が可能なように受けていることを特徴とする接続構造に係るものである。
The present invention is a joint device for connecting a branch pipe to a drilling portion of a main pipe, comprising a flexible waterproof joint member and a pipe receiving member, wherein the waterproof joint member includes a branch pipe. A cylindrical portion that is inserted and fixed to the outer peripheral surface of the branch pipe, a flange portion that covers and fixes the periphery of the drill hole portion of the main tube from the outside, and a connecting portion that connects between the cylindrical portion and the flange portion. The pipe receiving member includes a plurality of supports attached to a drilling portion of a main pipe, and a branch pipe that is supported by each of the supports and receives the branch pipe so that at least one of tilting and lateral movement is possible. And the support has a groove, the branch pipe receiver is made of an annular member, and the annular member is loosely fitted in the inner protrusion supporting the end of the branch pipe and the groove of the support. The present invention relates to a joint device comprising an outer projecting portion .
Further, the present invention is a connection structure including a main pipe, a branch pipe, and a joint device, and the branch pipe is connected to a drilling portion of the main pipe via the joint device, and the joint device is flexible. A water-stopping joint member and a pipe receiving member, the water-stopping joint member includes a tubular portion, a flange portion, and a connecting portion that connects between the tubular portion and the flange portion, The pipe receiving member includes a plurality of supports and a movable branch pipe holder, and the branch pipe is inserted into the cylindrical part of the water-stop joint member, and at least one part of the cylindrical part Is fixed to the outer peripheral surface of the branch pipe, the flange portion of the water-stopping joint member is fixed to cover the periphery of the drilling portion of the main pipe from the outside, and each support body of the pipe receiving member is It is attached to a drilling portion of a main pipe, and each of the supports supports a branch pipe holder of the pipe receiving member, and the branch pipe holder tilts the branch pipe. Those of the connecting structure, characterized by undergoing to allow at least one hand of lateral movement.
本発明の継手装置は、本管の削孔部に取り付けられる管受け部材を具え、かかる管受け部材が支持体で支持され枝管を傾動及び側方移動の少なくとも1方が可能なように受ける枝管受を具え、枝管と本管の接続において、従来のように地震や地盤沈下で枝管と本管に押込みや変位が生じるような場合でも、枝管の本管への押込みが防止でき、枝管の傾動及び側方移動の少なくとも1方の変位に追従する接続構造を提供できる。 The joint device of the present invention includes a pipe receiving member attached to a drilling portion of a main pipe, and the pipe receiving member is supported by a support so as to receive the branch pipe so that at least one of tilting and lateral movement is possible. A branch pipe holder is provided, and the branch pipe and main pipe are prevented from being pushed into the main pipe even when the branch pipe and main pipe are pushed or displaced due to an earthquake or ground subsidence as in the past. It is possible to provide a connection structure that follows the displacement of at least one of tilting and lateral movement of the branch pipe.
本管に接続される枝管の地震等による押込みを防止するという目的が、最小の部品点数で、本管と枝管との間の可とう性を損なわずに実現される。 The purpose of preventing the branch pipe connected to the main pipe from being pushed in due to an earthquake or the like is achieved with a minimum number of parts and without sacrificing the flexibility between the main pipe and the branch pipe.
(1)(本管、枝管)
本管と枝管は、地下に埋設される雨水管や汚水管等のように、大口径管とそれに接続される複数の小口径管とから想定されるような、接続対象として選ぶことができる管である。複数の管からの流動物が1本の管に集められるような管接続構造から想定される管でよい。本管と枝管の口径の差は、特に制限されるものではないが、一般的に、本管の口径の方が枝管よりも大きい。管の接続角度は特に制限されない。
(1) (Main pipe, branch pipe)
The main and branch pipes can be selected as connection targets, such as rainwater pipes and sewage pipes buried underground, as expected from large-diameter pipes and multiple small-diameter pipes connected to them. It is. The pipe | tube assumed from the pipe | tube connection structure that the fluid from a several pipe | tube is collected on one pipe | tube may be sufficient. The difference in diameter between the main pipe and the branch pipe is not particularly limited, but in general, the diameter of the main pipe is larger than that of the branch pipe. The connection angle of the tube is not particularly limited.
(2)(継手装置)
本管の削孔部に枝管を接続する継手装置は、可とう性の止水継手部材と管受け部材とよりなることができる。可とう性の止水継手部材は、継手装置において、可とう性や止水性を発揮する本質的な部材であり、継手の本体である。管受け部材は、主として、枝管の本管への押込みを防止するように働き、その一方で、枝管の上下左右方向(本管の管軸方向を上下方向として)又は後方向(枝管が押し込まれる方向を前方向として)への変位を許容するように働く。
(2) (Fitting device)
The joint device for connecting the branch pipe to the hole drilling portion of the main pipe can be composed of a flexible water-stop joint member and a pipe receiving member. A flexible water-stop joint member is an essential member that exhibits flexibility and water-stop in a joint device, and is a main body of the joint. The pipe receiving member mainly works to prevent the branch pipe from being pushed into the main pipe, while the vertical and horizontal directions of the branch pipe (the pipe axis direction of the main pipe is taken as the vertical direction) or the rear direction (branch pipe). It works to allow displacement in the direction in which the direction is pushed forward.
(3)(止水継手部材)
通常、接続継手として用いられるものである。種々の可とう性継手を用いることができる。また、接続構造の可とう性や止水性等に問題を生じさせない限り、既知の可とう継手を用いることができる。可とう性の止水継手部材は、筒状部、鍔部及びそれらを繋ぐ連結部よりなることができる。
(3) (Waterproof joint member)
Usually, it is used as a connection joint. Various flexible joints can be used. In addition, a known flexible joint can be used as long as it does not cause a problem in the flexibility of the connection structure, water stoppage, or the like. The flexible water-stop joint member can include a cylindrical portion, a flange portion, and a connecting portion that connects them.
筒状部は、内部に枝管を挿入することができ、その少なくとも1部が枝管の外周面に固定される。筒状は、主として円筒状を意味するが、枝管の外形等に沿うことができる形状も包含する。筒状部の枝管への固定には、締結バンド等を用いることができる。鍔部は本管の削孔部周辺を接続部の外側から覆い固定される。鍔部の固定には、剛性のカバー部材及びバンド、接着材、等の種々の手段を用いることができる。鍔部は削孔部周辺に接着し止水する止水層を有することができる。 The cylindrical part can insert a branch pipe inside, and at least one part thereof is fixed to the outer peripheral surface of the branch pipe. The cylindrical shape mainly means a cylindrical shape, but also includes a shape that can follow the outer shape of the branch pipe. A fastening band or the like can be used for fixing the cylindrical portion to the branch pipe. The collar portion covers and fixes the periphery of the main drilling portion from the outside of the connection portion. Various means such as a rigid cover member, a band, and an adhesive can be used for fixing the collar portion. The eaves part can have a water-stopping layer that adheres and stops water around the hole-cutting part.
可とう性止水継手本体は、スチレン・ブタジエンゴム、EPDM(エチレン・プロピレン・ジエンターポリマー)、CR(クロロプレンゴム)等の合成ゴム、天然ゴム及び軟質塩化ビニル樹脂、塩化ビニル系エラストマー、スチレン系熱可塑性エラストマー等からなる群より選ばれる少なくとも1種の材料を選択して形成することができる。 Flexible water-stop joint body is made of styrene / butadiene rubber, synthetic rubber such as EPDM (ethylene / propylene / diene terpolymer), CR (chloroprene rubber), natural rubber, soft vinyl chloride resin, vinyl chloride elastomer, styrene It can be formed by selecting at least one material selected from the group consisting of thermoplastic elastomers and the like.
締結バンド、剛性のカバーやバンド等の材質としては、ステンレス鋼、アルミニウム、防錆メッキ鋼、防錆被服鋼材等の金属、塩化ビニル樹脂、ABS(アクリロニトリルブタジエンスチレン)樹脂、PET(ポリエチレンテレフタレート)等の硬質プラスチック、FRP(ガラス繊維強化プラスチック)等の繊維補強プラスチック等からなる群より選ばれる少なくとも1種の材質を使用することができる。これら各材料は、腐食し難いので望ましい。 Fastening band, rigid cover and band materials such as stainless steel, aluminum, rust-proof plated steel, rust-proof steel materials, vinyl chloride resin, ABS (acrylonitrile butadiene styrene) resin, PET (polyethylene terephthalate), etc. At least one material selected from the group consisting of hard plastics, fiber reinforced plastics such as FRP (glass fiber reinforced plastics), and the like can be used. Each of these materials is desirable because it is difficult to corrode.
止水層は、ブチルゴム系、ゴムアス系等の粘着材、水膨張ゴム等の水膨張性シール材、ウレタン系、エポキシ系、シリコーン系等の、シール材、コーキング材、接着剤等の材質のものが使用できる。接着性と止水性との観点から、ブチルゴム系シール材が望ましい。 The water-stopping layer is made of adhesive materials such as butyl rubber and rubber ashes, water-expandable seal materials such as water-expanded rubber, urethane, epoxy and silicone materials such as seal materials, caulking materials and adhesives. Can be used. A butyl rubber-based sealing material is desirable from the viewpoints of adhesiveness and waterstop.
(4)(管受け部材)
複数の支持体と枝管受とからなることができる。支持体は本管の削孔部に取り付けられる。枝管受は、各支持体によって支持され、枝管の挿入端部を受けて、枝管が本管に押込まれるのを防止する。
(4) (Pipe receiving member)
It can consist of a plurality of supports and a branch receiver. The support is attached to the main drilling. The branch pipe receiver is supported by each support and receives the insertion end of the branch pipe to prevent the branch pipe from being pushed into the main pipe.
支持体は少なくとも1対からなることができ、各支持体は本管の削孔部の対向する位置に取り付けることができる。支持体は壁係止部等を有することができ、これによって本管の削孔部の内面に取り付けることができる。支持体は、枝管受を受ける部分、例えば、枝管受台受け部、好ましくは、溝部を有することができ、これによって枝管受を受けることができる。 The support body can be composed of at least one pair, and each support body can be attached to an opposing position of the drilling portion of the main pipe. The support can have a wall locking part or the like, and can thereby be attached to the inner surface of the drilling part of the main pipe. The support body can have a portion for receiving a branch pipe receiver, for example, a branch pipe cradle receiving part, preferably a groove part, whereby the branch pipe receiver can be received.
枝管受は、枝管の挿入端部が本管に押し込まれないように枝管を受けると共に、枝管の傾動及び側方移動の少なくとも1方が可能なように可動性を有する。 The branch pipe receiver receives the branch pipe so that the insertion end of the branch pipe is not pushed into the main pipe, and is movable so that at least one of tilting and lateral movement of the branch pipe is possible.
可動性の枝管受は、支持体と枝管受との組み合わせによって実現させることができる。例えば、可動性の枝管受は、溝部を有する支持体とこの溝部に遊嵌される突出部を有する枝管受によって達成される。 The movable branch tube receiver can be realized by a combination of a support and a branch tube receiver. For example, the movable branch tube receiver is achieved by a support body having a groove portion and a branch tube receiver having a protrusion portion loosely fitted in the groove portion.
枝管受は、枝管の本管への押込みを防止するための環状部材からなることができる。環状部材は、円筒体等から形成することができ、枝管の挿入端部を支持する内側突出部、特に、内側フランジ部と、支持体の溝部に遊嵌される外側突出部とを具える。環状部材は、枝管受台でよく、枝管受台は、枝管の挿入端部を支持する内側突出部を有する円筒体と、支持体に支持される支持体係止部とを有する。
The branch pipe receiver can be formed of an annular member for preventing the branch pipe from being pushed into the main pipe. The annular member can be formed of a cylindrical body or the like, and includes an inner protrusion that supports the insertion end of the branch pipe, in particular, an inner flange, and an outer protrusion that is loosely fitted in the groove of the support. . The annular member may be a branch pipe cradle, and the branch pipe cradle includes a cylindrical body having an inner projecting portion that supports an insertion end portion of the branch pipe, and a support body locking portion supported by the support body.
枝管受は、支持体によって、枝管の挿入端部が本管に押し込まれないように支持される一方で、枝管の上下左右方向(本管の管軸方向を上下方向として)又は後方向(枝管が押し込まれる方向を前方向として)への変位が許容される。 The branch pipe receiver is supported by the support so that the insertion end of the branch pipe is not pushed into the main pipe, while the vertical and horizontal directions of the branch pipe (the pipe axis direction of the main pipe is the vertical direction) or the rear Displacement in the direction (with the direction in which the branch pipe is pushed in as the forward direction) is allowed.
本管の削孔部において、本管の管軸方向に1対の支持体が取り付けられる場合、枝管の左右方向の変位は、枝管受の外側突出部が支持体の溝部において溝の幅方向に動くことにより許容され、枝管の上下方向の変位は、枝管受の外側突出部が支持体の溝部において溝の上下方向に動くことにより許容される。 When a pair of supports are mounted in the main tube drilling direction in the main pipe drilling portion, the lateral displacement of the branch pipe is determined by the width of the groove at the outer protrusion of the branch pipe holder at the groove portion of the support. The displacement of the branch pipe in the vertical direction is allowed by moving the outer protrusion of the branch pipe holder in the vertical direction of the groove in the groove portion of the support.
支持体、枝管受等のような管受け部材の材質は、枝管が本管に押込まれるのを防止できるものである。前述の締結バンド等の材質と同様のものでよい。すなわち、ステンレス鋼、アルミニウム、防錆メッキ鋼、防錆被服鋼材等の金属、塩化ビニル樹脂、ABS樹脂、PET等の硬質プラスチック、FRP等の繊維補強プラスチック等からなる群より選ばれる少なくとも1種の材質を使用することができる。これら各材料は、腐食し難いので望ましい。 The material of the pipe receiving member such as the support, the branch pipe holder, etc. can prevent the branch pipe from being pushed into the main pipe. The same material as the fastening band described above may be used. That is, at least one selected from the group consisting of metals such as stainless steel, aluminum, rust-proof plated steel, and rust-proof steel, vinyl chloride resin, ABS resin, hard plastics such as PET, fiber reinforced plastics such as FRP, etc. Material can be used. Each of these materials is desirable because it is difficult to corrode.
(5)(接続構造)
上述のような本管と枝管と継手装置とを具える。上述の継手装置を介して本管の削孔部に枝管を接続することによって得られる。継手装置は、可とう性の止水継手部材と管受け部材とを具える。止水継手部材は、筒状部と、鍔部と、それらを繋ぐ連結部とを具える。管受け部材は、複数の支持体と、可動性の枝管受とを具える。かかる接続構造は、水密構造となり、枝管が本管に押し込まれるのを防止できる一方で、枝管の傾動及び側方移動の少なくとも1種が可能である。
(5) (Connection structure)
The main pipe, the branch pipe, and the joint device as described above are provided. It is obtained by connecting a branch pipe to the drilling part of the main pipe through the above-described joint device. The joint device includes a flexible water-stop joint member and a pipe receiving member. The water-stop joint member includes a cylindrical portion, a flange portion, and a connecting portion that connects them. The tube receiving member includes a plurality of supports and a movable branch tube receiver. Such a connection structure becomes a watertight structure and can prevent the branch pipe from being pushed into the main pipe, while at least one of tilting and lateral movement of the branch pipe is possible.
上記接続構造は、以下の方法によって施工することができる。管受け部材の支持体を本管の削孔部に取り付け、管受け部材の枝管受を支持体で受け、止水継手部材の鍔部を削孔部が覆われるように本管の外側から固定し、止水継手部材の筒状部内に枝管を挿入し、筒状部の少なくとも1部を枝管の外周面に固定し、枝管受が枝管を傾動及び/若しくは側方移動の少なくとも1方が可能なように受けるようにする。 The connection structure can be constructed by the following method. Attach the support of the pipe receiving member to the drilling part of the main pipe, receive the branch pipe receiving of the pipe receiving member with the support, and from the outside of the main pipe so that the pierced part of the water stop joint member is covered with the drilling part The branch pipe is inserted into the cylindrical portion of the water-stopping joint member, and at least one part of the cylindrical portion is fixed to the outer peripheral surface of the branch pipe, and the branch pipe receiver tilts and / or laterally moves the branch pipe. Try to receive at least one of them as possible.
本発明の実施の形態について、図面を参照して説明する。
図1は本発明の1例の継手装置を用いる接続構造の縦断面図である。図2は図1の接続構造を本管の管軸方向に切断して見る縦断面図である。図3は図1の接続構造の上面図である。図4(a)は1例の管受け部材の縦断面図であり、(b)は(a)の管受け部材の上面図である。
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a connection structure using a joint device according to an example of the present invention. FIG. 2 is a longitudinal sectional view of the connection structure of FIG. 1 cut along the tube axis direction of the main pipe. FIG. 3 is a top view of the connection structure of FIG. FIG. 4A is a longitudinal sectional view of one example of the tube receiving member, and FIG. 4B is a top view of the tube receiving member of FIG.
図5(a)は1例の可とう性止水継手部材の縦断面図であり、(b)は(a)の継手部材の上面図である。図6は図5(b)の継手部材のA−A断面図である。図7は管受け部材の取り付け要領を示す縦断面図である。図8は図7の管受け部材の取り付け要領を示す上面図である。図9は1例の支持体の正面図である。図10は本管と枝管との間の相対的変位を示す縦断面図である。 Fig.5 (a) is a longitudinal cross-sectional view of an example flexible waterproof joint member, (b) is a top view of the joint member of (a). FIG. 6 is a cross-sectional view of the joint member of FIG. FIG. 7 is a longitudinal cross-sectional view showing the attachment procedure of the tube receiving member. FIG. 8 is a top view showing the attachment procedure of the tube receiving member of FIG. FIG. 9 is a front view of an example support. FIG. 10 is a longitudinal sectional view showing a relative displacement between the main pipe and the branch pipe.
1例の継手装置を図1〜3に示す。継手装置1は本管2の削孔2Aと枝管3との接続に用いる。継手装置1は、止水可とう継手4と管受け部材5とを具える。止水可とう継手4は、枝管3を挿入され枝管3の外周面に固定される円筒部4Aと、本管2の削孔2A周辺を外側から覆い固定される鍔部4Bと、それらを繋ぐ連結部4Cとを具える。管受け部材5は、本管2の削孔2Aに取り付けられる複数の支持体5Aと、各支持体5Aで支持され枝管3を傾動及び側方移動の少なくとも1方が可能なように受ける枝管受台5Bとを具える。
One example of the joint device is shown in FIGS. The
図1及び2に示すように、本管2の削孔2Aに設けられた支持体5Aと可動性の円筒体からなる枝管受台5Bとを有する管受け部材5を止水可とう継手4が覆い、枝管3が止水可とう継手4を介し管受け部材5に挿入され、枝管3と止水可とう継手4とは締結バンド6で固定される。図2に詳細に示すように、止水可とう継手4には、鍔部4Bと本管3の外面の間に止水層7を設ける。
As shown in FIGS. 1 and 2, a
図2及び4に詳細に示すように、支持体5Aは、壁係止部5Cと枝管受台受け部5Dとを有し、枝管受台5Bは、円筒体5Eと支持体係止部5Fとを有し、枝管受台5Bが支持体係止部5Fによって支持体5Aに支持され、支持体5Aは枝管受台5Bが受ける荷重を保持することができる。図4では、管受け部材の縦断面図及び上面図を示し、枝管受台5Bの円筒体5Eに設けられた支持体係止部5Fが支持体5Aの壁係止部5Cに設けられた枝管受台受け部5Dに係止された状態を示す。
As shown in detail in FIGS. 2 and 4, the
図5及び6では、止水可とう継手の縦断面図、上面図及び横断面図を示す。止水可とう継手4は、円筒部4Aと鍔部4Bとそれらを繋ぐ連結部4Cよりなり、鍔部4Bの全周にわたり止水層7が設けられている。止水層7は、接着性と止水性とに満足できるブチルゴム系シール材が望ましい。
5 and 6 show a longitudinal sectional view, a top view, and a transverse sectional view of a water-stopper flexible joint. The water stop flexible joint 4 includes a
図7及び8は、管受け部材5の取り付け要領を示す縦断面図及び上面図である。本管2の削孔2Aに、最初に、枝管受台受け部5Dと壁係止部5Cとを有する支持体5Aを取り付ける。次に、可動性の枝管受台5Bとして、枝管受けのための円筒体5Eに具えられた支持体係止部5Fを、枝管受台受け部5Dに挿入し、取り付ける。
7 and 8 are a longitudinal sectional view and a top view showing how to attach the
図9は、支持体の枝管受台受け部を削孔部の中心側から見た状態を詳細に示す正面図である。図9に示すように、支持体5Aは、壁係止部5Cと枝管受台受け部5Dとを具え、枝管受台受け部5Dは、凹部を形成する溝8からなる。図8等で示したように、枝管受台5Bは、凸部を形成する支持体係止部5Fを持ち、支持体係止部5Fが溝8に挿入される。溝8の幅は枝管受台5Bの支持体係止部5Fの幅よりも大きくなるように設計され、枝管受台5Bの支持体係止部5Fは溝8に緩挿される。
FIG. 9 is a front view showing in detail a state in which the branch pipe cradle receiving part of the support is viewed from the center side of the drilling part. As shown in FIG. 9, the
図10は本管に対し枝管に屈曲変位θが生じたときの状態を示す縦断面図である。変位状態においても枝管3の本管2への押込みが防止できる状態が分かる。また、枝管3は、管受け部材5の可動性の枝管受台5Bに挿入され、固定されているが、管受け部材5は、枝管3の傾動変位に追従し、止水可とう継手4も変位に追従する。
FIG. 10 is a longitudinal sectional view showing a state when a bending displacement θ is generated in the branch pipe with respect to the main pipe. It can be seen that even in the displaced state, the
以上の説明から明らかなように、本発明の継手装置は、枝管と本管の接続において地震や地盤沈下等で、枝管と本管とに押込みや変位が生じた場合でも、枝管が本管削孔部に押し込まれるのを防止でき、また、可動性の管受け部材や管受け部材を本管の外面から覆う可とう性の止水継手により、枝管の本管への押込みが防止できる一方で、枝管の傾動及び/若しくは側方移動の変位に追従する接続構造を提供することができる。 As is clear from the above description, the joint device of the present invention has the branch pipe even when the branch pipe and the main pipe are pushed or displaced due to an earthquake or ground subsidence in the connection between the branch pipe and the main pipe. It is possible to prevent the main pipe from being pushed into the main drilling hole, and the flexible water stop joint that covers the movable pipe receiving member and the pipe receiving member from the outer surface of the main pipe prevents the branch pipe from being pushed into the main pipe. While being able to prevent, the connection structure which follows the displacement of the branch pipe tilt and / or the lateral movement can be provided.
1 継手装置
2 本管
2A 削孔
3 枝管
4 止水可とう継手
4A 円筒部
4B 鍔部
4C 連結部
5 管受け部材
5A 支持体
5B 枝管受台
5C 壁係止部
5D 枝管受台受け部
5E 円筒体
5F 支持体係止部
6 締結バンド
7 止水層
8 溝
DESCRIPTION OF
Claims (3)
A connection structure in which a main pipe, a branch pipe, and a joint device are provided, and the branch pipe is connected to a drilled portion of the main pipe via the joint device, and the joint device is a flexible water-stop joint member And the water-stopping joint member includes a tubular portion, a flange portion, and a connecting portion that connects between the tubular portion and the flange portion, the tube receiving member, A plurality of supports and a movable branch pipe receiver, wherein the branch pipe is inserted into the cylindrical portion of the water stop joint member, and at least one part of the cylindrical portion is an outer periphery of the branch pipe Fixed to the surface, and the flange portion of the water stop joint member is fixed so as to cover the periphery of the hole portion of the main pipe from the outside, and each support body of the pipe receiving member is a hole portion of the main pipe Each support body supports a branch pipe receiver of the pipe receiving member, and the branch pipe receiver tilts the branch pipe and causes little lateral movement. Connecting structure, characterized in that both have received as 1-way that is possible.
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