JPH0720476Y2 - Liquid inflow prevention plug - Google Patents
Liquid inflow prevention plugInfo
- Publication number
- JPH0720476Y2 JPH0720476Y2 JP11511489U JP11511489U JPH0720476Y2 JP H0720476 Y2 JPH0720476 Y2 JP H0720476Y2 JP 11511489 U JP11511489 U JP 11511489U JP 11511489 U JP11511489 U JP 11511489U JP H0720476 Y2 JPH0720476 Y2 JP H0720476Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- plug
- branch pipe
- locking plate
- liquid inflow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Pipe Accessories (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、下水管等の埋設管を合成樹脂にてライニング
する際に、該埋設管から分岐した分岐管の該埋設管に連
通する端部に装着されて該分岐管内もしくは埋設管本管
内へ液体が流入することを防止する液体流入防止栓に関
する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is directed to an end of a branch pipe branched from the buried pipe communicating with the buried pipe when the buried pipe such as a sewer pipe is lined with a synthetic resin. The present invention relates to a liquid inflow prevention plug that is attached to a portion to prevent liquid from flowing into the branch pipe or the buried pipe main pipe.
（従来の技術） 上水道や下水道として使用される埋設管には、古くから
金属管やヒューム管が使用されている。このような埋設
管は、長期の使用によって老朽化し、腐食による損傷、
ひび割れ等が生じて漏水するおそれがある。このため、
最近では、老朽化した埋設管に合成樹脂製の管を挿入し
て該合成樹脂管にて埋設管内周面をライニングすること
が行われている。(Prior Art) Metal pipes and fume pipes have been used for a long time as buried pipes used as waterworks and sewers. Such buried pipes deteriorate over time and are damaged by corrosion,
There is a risk that water will leak due to cracking. For this reason,
Recently, a synthetic resin pipe is inserted into an aged buried pipe to line the inner peripheral surface of the buried pipe with the synthetic resin pipe.
通常、下水道等の埋設管の本管には、多数の分岐管が分
岐しており、各分岐管から該本管に下水等が流入してい
る。このため、上述したように本管を合成樹脂管にてラ
イニングする工法では、各分岐管から流入する下水等が
本管内に流入しないように、各分岐管と本管との連通部
を止水する必要があり、例えば特開昭61−38031号公報
には、各分岐管を、ゴム栓を用いた止水栓にて止水する
方法が開示されている。該止水栓は、本管内から分岐管
の端部内へ挿入される。Usually, a large number of branch pipes branch into a main pipe of a buried pipe such as a sewer, and sewage and the like flow into the main pipe from each branch pipe. Therefore, in the method of lining the main pipe with the synthetic resin pipe as described above, the communication part between each branch pipe and the main pipe is stopped so that sewage flowing from each branch pipe does not flow into the main pipe. For example, Japanese Patent Laid-Open No. 61-38031 discloses a method of stopping each branch pipe with a water stopper using a rubber stopper. The water stopcock is inserted from inside the main pipe into the end of the branch pipe.
（考案が解決しようとする課題） しかしながら、各分岐管をゴム栓等にて止水している
と、該ゴム栓には、分岐管内を流通する下水等の圧力が
加わる。合成樹脂管にてライニングされる本管は、通
常、地表から3m程度の深さで埋設されているため、分岐
管内に装着された止水栓には、最大で、0.3kg・f/cm2程
度の水圧が加わる。従って、該止水栓には、分岐管の端
部から本管内へ抜ける方向に力が加わり、該止水栓は、
その一部が分岐管から抜け出て本管内に突出した状態に
なったり、甚だしい場合には、該止水栓が分岐管から完
全に抜け落ちるおそれがある。(Problems to be solved by the invention) However, when each branch pipe is stopped by a rubber plug or the like, a pressure such as sewage flowing in the branch pipe is applied to the rubber plug. Since the main pipe lined with a synthetic resin pipe is usually buried at a depth of about 3 m from the surface of the earth, the maximum of 0.3 kgf / cm 2 can be installed in the stopcock installed in the branch pipe. Water pressure is applied. Therefore, a force is applied to the water stopcock in the direction of exiting from the end of the branch pipe into the main pipe, and the water stopcock is
If a part of the water stopper comes out of the branch pipe and projects into the main pipe, or if it is severe, the water shutoff plug may completely fall out of the branch pipe.
また、本管を合成樹脂管でライニングする場合には、該
本管と該本管をライニングする合成樹脂管との間に、裏
込め剤が充填される。該裏込め剤は、通常、0.5kg・f/c
m2程度の圧力により充填されるため、分岐管の端部に装
着された止水栓には、止水される下水等の圧力とは反対
に、裏込め剤により分岐管内に押し込められる力が作用
し、該止水栓が分岐管内に押し込められるおそれがあ
る。このような状態になると、裏込め剤が分岐管内に流
入し、本管をライニングする合成樹脂管と分岐管とを連
通させるべく開設される連通孔が長くなるために、該連
通孔を開設することが困難になる。When the main pipe is lined with a synthetic resin pipe, a back-filling agent is filled between the main pipe and the synthetic resin pipe lining the main pipe. The back-filling agent is usually 0.5 kgf / c
Since it is filled with a pressure of about m 2, the water stopcock attached to the end of the branch pipe has a force that can be pushed into the branch pipe by the backfill agent, contrary to the pressure of sewage that is stopped. There is a risk that the water stopper will be pushed into the branch pipe. In such a state, the backfill agent flows into the branch pipe, and the communication hole that is opened to connect the synthetic resin pipe lining the main pipe and the branch pipe becomes long, so that the communication hole is opened. Becomes difficult.
このような問題を解決するために、本願出願人は、特願
昭63−235857号明細書にて、分岐管に装着された際に、
該分岐管を通流する下水等を本管内へのみ通流させる逆
止弁、および本管内周面に係止する係止板を有する液体
流入防止栓を提案している。In order to solve such a problem, the applicant of the present application discloses in Japanese Patent Application No. 63-235857 that when mounted on a branch pipe,
A check valve that allows sewage flowing through the branch pipe to flow only into the main pipe, and a liquid inflow prevention plug having a locking plate that locks the inner peripheral surface of the main pipe have been proposed.
しかしながら、各分岐管は、本管に対して直角に接続さ
れているとは限らず、通常は、本管に対して傾斜した状
態になっている。このため、上記明細書の液体流入防止
栓では、栓体が係止板に対して略直交状態になっている
ため、本管に対して傾斜した状態の分岐管内に栓体を装
着した際に、係止板が分岐管の軸心に対して略直交した
状態になり、該係止板の一部が本管内へ突出した状態に
なる。このように、係止板の一部が本管内に突出した状
態になれば、該本管内に合成樹脂管を挿入する際の支障
になり、該合成樹脂管が該係止板にて損傷されたり、該
合成樹脂管を本管内へ完全に挿入することができないお
それがある。また、合成樹脂管に係止板が引っかかる
と、止水栓自体が分岐管から脱落するおそれもある。該
止水栓が分岐管から完全に抜け落ちれば、本管内に挿入
された合成樹脂管と本管との間に充填される裏込め剤が
分岐管内に流入するため、合成樹脂管と分岐管との連通
孔の開設が困難になる。前述した公報に開示されたゴム
栓の場合にも、分岐管に圧入された止水栓が下水により
分岐管から一部が突出した状態、あるいは分岐管から抜
け落ちた状態になれば、同様の問題が生じる。However, each branch pipe is not always connected to the main pipe at a right angle, and is normally inclined with respect to the main pipe. Therefore, in the liquid inflow prevention plug of the above-mentioned specification, since the plug body is in a state substantially orthogonal to the locking plate, when the plug body is mounted in the branch pipe inclined to the main pipe. The locking plate becomes substantially orthogonal to the axis of the branch pipe, and a part of the locking plate projects into the main pipe. In this way, if a part of the locking plate projects into the main pipe, it will be a hindrance when inserting the synthetic resin pipe into the main pipe, and the synthetic resin pipe will be damaged by the locking plate. Or, there is a possibility that the synthetic resin pipe cannot be completely inserted into the main pipe. Further, if the locking plate is caught by the synthetic resin pipe, the water stopcock itself may fall off from the branch pipe. When the water stopper completely falls off from the branch pipe, the backfilling agent filled between the synthetic resin pipe inserted into the main pipe and the main pipe flows into the branch pipe. It becomes difficult to open a communication hole with. Also in the case of the rubber plug disclosed in the above-mentioned publication, if the water stopcock press-fitted into the branch pipe partially projects from the branch pipe or falls off from the branch pipe due to sewage, the same problem occurs. Occurs.
本考案は上記従来の問題を解決するものであり、その目
的は、本管内から、例えば、該本管に対して傾斜した状
態の分岐管の端部における所定位置に確実に装着するこ
とができ、しかも、分岐管から抜け落ちるおそれがな
く、該分岐管の所定位置に確実に保持されるとともに、
係止板が本管内周面に沿った状態に保持される液体流入
防止栓を提供することにある。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to surely mount it from inside the main pipe, for example, at a predetermined position at the end of the branch pipe that is inclined with respect to the main pipe. Moreover, there is no risk of falling off from the branch pipe, and the branch pipe is securely held at a predetermined position,
Another object of the present invention is to provide a liquid inflow prevention plug in which the locking plate is held along the inner peripheral surface of the main pipe.
（課題を解決するための手段） 本考案の液体流入防止栓は、本管から分岐した分岐管の
該本管に連通する端部に装着されて、液体の流入を防止
する液体流入防止栓であって、該分岐管の該端部内に嵌
合されて該端部内周面に液密に圧接される栓体と、該栓
体が分岐管の該端部内周面に圧接された状態で該分岐管
端部の開口端周縁部である本管内周面に係止されるよう
に該栓体に対向して配設された係止板と、該栓体と該係
止板とを連結する伸縮可能な連結部材と、を具備し、該
係止板には、本管内周面に係止した該係止板に対して該
栓体を分岐管の内奥側に遠ざけるべく該栓体を押込む押
込部材が挿通し得る貫通孔が開設されているとともに、
前記栓体の前記係止板に対向する面の周縁部には、該押
込部材が係止されるように該係止板に向けて突出する係
止部が設けられていることを特徴としてなり、そのこと
により上記目的が達成される。(Means for Solving the Problems) The liquid inflow prevention plug according to the present invention is a liquid inflow prevention plug that is attached to an end portion of a branch pipe branched from a main pipe and communicates with the main pipe. And a plug body fitted in the end portion of the branch pipe and liquid-tightly pressed against the inner peripheral surface of the end pipe, and a plug body in a state where the plug body is pressed against the inner peripheral surface of the end portion of the branch pipe. A locking plate disposed so as to face the plug body so as to be locked to the inner peripheral surface of the main pipe which is the peripheral edge of the opening end of the branch pipe, and connects the plug body and the locking plate. An expandable and contractable connecting member is provided, and the locking plate is provided with the plug body so as to separate the plug body from the inner side of the branch pipe with respect to the locking plate locked to the inner peripheral surface of the main pipe. There is a through hole through which the pushing member to be pushed can be inserted,
The peripheral portion of the surface of the plug body facing the locking plate is provided with a locking portion projecting toward the locking plate so that the pushing member is locked. Therefore, the above object is achieved.
（実施例） 以下に本考案を実施例について説明する。(Embodiment) An embodiment of the present invention will be described below.
本考案の液体流入防止栓は、第４図に示すように、例え
ば老朽化した下水管である本管81を合成樹脂管にてライ
ニングする際に、該本管から分岐する分岐管82における
該本管81に連通する端部に装着されて使用される。As shown in FIG. 4, the liquid inflow prevention plug according to the present invention is provided in a branch pipe 82 that branches from a main pipe 81, which is an aged sewer pipe, when the main pipe 81 is lined with a synthetic resin pipe. It is used by being attached to the end communicating with the main pipe 81.
該液体流入防止栓10は、第１図〜第３図に示すように、
矩形状の平板を、本管81の内周面に沿うように湾曲させ
た係止板11を有する。該係止板11の各辺の長さは、分岐
管82の内径よりも長くなっている。The liquid inflow prevention plug 10 is, as shown in FIGS. 1 to 3,
The locking plate 11 is formed by bending a rectangular flat plate along the inner peripheral surface of the main pipe 81. The length of each side of the locking plate 11 is longer than the inner diameter of the branch pipe 82.
該係止板11の中央部には、円形状の透孔11aが開設され
ており、該透孔11aの周縁部に円筒状をした伸縮可能な
例えばゴム製の連結部材12の一端部が取り付けられてい
る。該連結部材12の他端部には、該連結部材12の外径よ
りも大きい円環状をした中空の栓体13が同心状に連結さ
れている。A circular through hole 11a is formed in the center of the locking plate 11, and one end of a cylindrical expandable / contractible coupling member 12 is attached to the peripheral edge of the through hole 11a. Has been. To the other end of the connecting member 12, there is concentrically connected an annular hollow plug body 13 having an outer diameter larger than the outer diameter of the connecting member 12.
該栓体13は、伸縮性を有する例えばゴム製チューブにて
構成されており、上述のゴム製の連結部材12とは一体的
に形成されている。該栓体13の係止板11に対向する面の
周縁部には、該係止板11に向かって突出する係止部13e
が形成されている。該係止部13eは、後述するように、
栓体13を押圧する押込杆の先端が係止される。The plug body 13 is made of, for example, a rubber tube having elasticity, and is integrally formed with the above-mentioned rubber connecting member 12. At the peripheral portion of the surface of the plug body 13 facing the locking plate 11, a locking portion 13e protruding toward the locking plate 11 is formed.
Are formed. The locking portion 13e, as described later,
The tip of the pushing rod that presses the plug 13 is locked.
また、該栓体13の係止板11に対向する面には、栓体13内
部に一端部が位置するエア注入管13aが、該面とは直交
するように取り付けられている。該エア注入管13aの、
中空の栓体13内に位置する一端部の先端には、逆止弁13
bが配設されており、該逆止弁13bは、栓体13内へのみ気
体を流入させる。エア注入管13aは栓体13から係止板11
側へ突出しており、その先端部は、該係止板11を貫通し
ている。該栓体13は、該エア注入管13aを介して内部に
エアが注入されることにより膨張する。該栓体13の外周
面には、軸心方向に適当な間隔をあけて、複数の突条13
cが配設されており、該栓体13が膨張した状態で各突条1
3cが分岐管82の内周面に液密に当接する。Further, an air injection pipe 13a having one end located inside the plug 13 is attached to a surface of the plug 13 facing the locking plate 11 so as to be orthogonal to the surface. Of the air injection pipe 13a,
At the tip of one end located inside the hollow stopper 13, the check valve 13
b is provided, and the check valve 13b allows gas to flow only into the plug body 13. The air injection pipe 13a is provided with a stopper plate 11
Projecting to the side, and the tip end thereof penetrates the locking plate 11. The plug 13 expands when air is injected into the inside through the air injection pipe 13a. A plurality of ridges 13 are formed on the outer peripheral surface of the plug body 13 at appropriate intervals in the axial direction.
c is provided, and each ridge 1 is
3c contacts the inner peripheral surface of the branch pipe 82 in a liquid-tight manner.
該栓体13の中央部における係止板11側部分には、円筒状
の弁座14が内嵌されており、該弁座14に、逆止弁15が支
持されている。該逆止弁15は、環状の栓体13の中央部を
係止板11側に向かってのみ液体を通流させる。該栓体13
の中央部には、逆止弁15から適当な間隔をあけて、短円
筒状の支持部材16が嵌合されている。A cylindrical valve seat 14 is fitted in a portion of the central portion of the stopper 13 on the locking plate 11 side, and a check valve 15 is supported by the valve seat 14. The check valve 15 allows the liquid to flow through the central portion of the annular plug 13 only toward the locking plate 11. The stopper 13
A short-cylindrical support member 16 is fitted in the center of the check valve 15 at an appropriate distance.
前記係止板11の中央部の透孔11aの周囲には、例えば四
等配に該透孔11aよりも小径の四つの貫通孔11bが配設さ
れている。各貫通孔11bには、後述するように栓体13に
当接して該栓体13の所定部分を押圧することにより、該
栓体13を該係止板11から遠ざけるように分岐管82内へ押
込む押込杆がそれぞれ挿通される。Around the through hole 11a at the center of the locking plate 11, for example, four through holes 11b having a diameter smaller than that of the through hole 11a are arranged in four equal distributions. As will be described later, each through hole 11b is brought into contact with the plug body 13 and presses a predetermined portion of the plug body 13 into the branch pipe 82 so as to move the plug body 13 away from the locking plate 11. The pushing rods to be pushed in are respectively inserted.
このような構成の液体流入防止栓10は、老朽化した下水
管である本管81を、例えば、合成樹脂製の螺旋管にて更
生するライニング工法に使用される。該液体流入防止栓
10は、このライニング工法において、本管81内に螺旋管
を挿入する工程に先立ち、分岐管82の本管81に連通する
端部内に装着される。The liquid inflow prevention plug 10 having such a configuration is used in a lining construction method for rehabilitating an aged main pipe 81 which is a sewer pipe, for example, with a spiral pipe made of synthetic resin. The liquid inflow prevention plug
In this lining method, 10 is mounted in the end portion of the branch pipe 82 communicating with the main pipe 81 prior to the step of inserting the spiral pipe into the main pipe 81.
該液体流入防止栓10の分岐管82内への装着に際し、例え
ば、本管81内に作業者が入り込めないような小径の場合
には、液体流入防止栓取付装置が使用される。When mounting the liquid inflow prevention plug 10 into the branch pipe 82, for example, when the diameter is such that an operator cannot enter the main pipe 81, a liquid inflow prevention plug attachment device is used.
液体流入防止栓取付装置は、液体流入防止栓10の係止板
11が載置される栓支持部を有し、該栓支持部に例えば、
４本の押込杆が立設されている。各押込杆は、液体流入
防止栓10の係止板11に設けられた各貫通孔11bを貫通し
て、栓体13における係止板11に対向する面に当接され
る。各押込杆は、該押込杆先端に支持された栓体13が、
本管81に対する分岐管82の傾斜角度と同様の傾斜状態に
なるように、それぞれの長さが設定されている。The liquid inflow prevention plug mounting device is a locking plate for the liquid inflow prevention plug 10.
11 has a plug support portion on which the plug support portion is placed, and for example, in the plug support portion,
Four push rods are erected. Each push rod penetrates each through hole 11b provided in the locking plate 11 of the liquid inflow prevention plug 10 and is brought into contact with the surface of the plug body 13 facing the locking plate 11. Each push rod has a plug 13 supported at the tip of the push rod,
The respective lengths are set so that the branch pipe 82 has an inclination angle similar to that of the main pipe 81.
このような液体流入防止栓取付装置により、液体流入防
止栓10を所定の分岐管82に取り付ける場合には、該液体
流入防止栓の栓支持部に、液体流入防止栓10の係止板11
が載置される。このとき、液体流入防止栓10の栓体13内
の気体は除去されて該栓体13は収縮した状態になってお
り、例えば、粘着テープ等により該栓体13が収縮状態を
保持するように緩く仮止めされている。そして、該液体
流入防止栓10の係止板11に開設された四つの貫通孔11b
に、所定長さの各押込杆がそれぞれ挿通されて、各押込
杆の先端に栓体13が所定の傾斜状態とされて支持され
る。When the liquid inflow prevention plug 10 is attached to a predetermined branch pipe 82 by such a liquid inflow prevention plug attaching device, the locking plate 11 of the liquid inflow prevention plug 10 is attached to the stopper support portion of the liquid inflow prevention plug.
Is placed. At this time, the gas in the stopper 13 of the liquid inflow prevention stopper 10 is removed and the stopper 13 is in a contracted state. For example, the stopper 13 is kept in a contracted state by an adhesive tape or the like. It is loosely temporarily fixed. Then, the four through holes 11b formed in the locking plate 11 of the liquid inflow prevention plug 10
The push rods having a predetermined length are respectively inserted into the plugs, and the plugs 13 are supported by the tips of the push rods in a predetermined inclined state.
このような状態で、液体流入防止栓取付装置に液体流入
防止栓10が支持されて、液体流入防止栓10を装着すべき
分岐管82の下方に、該液体流入防止栓取付装置が位置さ
れる。このとき、栓支持部に支持された液体流入防止栓
10が、分岐管82の開口部の直下に位置される。In such a state, the liquid inflow prevention plug mounting device is supported by the liquid inflow prevention plug mounting device, and the liquid inflow prevention plug mounting device is located below the branch pipe 82 to which the liquid inflow prevention plug 10 is to be mounted. . At this time, the liquid inflow prevention plug supported by the plug support part
10 is located directly below the opening of the branch pipe 82.
次いで、栓支持部全体が上昇され、各押込杆にて分岐管
82の傾斜状態と同様の傾斜状態に支持された液体流入防
止栓10の栓体13が、分岐管82内へ挿入される。Next, the entire stopper support is raised, and the branch pipe is
The stopper 13 of the liquid inflow prevention stopper 10 supported in the same inclined state as 82 is inserted into the branch pipe 82.
栓体13が完全に分岐管82内へ挿入された状態になって
も、さらに栓支持部を上昇させると、液体流入防止栓10
における係止板11が分岐管82の開口端周縁である本管81
内周面に係止する。このような状態で、栓支持部をさら
に上昇させると、液体流入防止栓10の係止板11が本管81
内周面に係止された状態で、該係止板11の各貫通項11b
を挿通して栓体13を支持する各押込杆が栓体13を分岐管
82内へさらに挿入する。これにより、液体流入防止栓10
の栓体13が分岐管82の内奥側へ移動し、該栓体13と係止
板11との間に介装された連結部材12が伸張され、本管81
内周面に係止した係止板11が該連結部材12にて栓体13側
へ牽引された状態になる。Even when the stopper 13 is completely inserted into the branch pipe 82, if the stopper support is further raised, the liquid inflow prevention stopper 10
The main plate 81 in which the locking plate 11 at is the peripheral edge of the opening end of the branch pipe 82.
Lock on the inner surface. When the stopper support is further raised in such a state, the locking plate 11 of the liquid inflow prevention stopper 10 is released from the main pipe 81.
In the state of being locked to the inner peripheral surface, each penetration item 11b of the locking plate 11 is
Each pushing rod that supports the plug body 13 by inserting the branch pipe into the plug body 13
Insert further into 82. As a result, the liquid inflow prevention plug 10
Of the main pipe 81 moves to the inner side of the branch pipe 82, the connecting member 12 interposed between the plug 13 and the locking plate 11 is expanded, and the main pipe 81
The locking plate 11 locked to the inner peripheral surface is pulled by the connecting member 12 toward the plug body 13.
このとき、第４図に二点鎖栓で示すように、押込杆38の
先端部は、傾斜状態の栓体13の係止板11に対向する面の
周縁部に形成された係止部13eに係止される。このた
め、各押込杆38の先端部が該栓体13から外れるおそれが
なく、各押込杆38は、該栓体13を確実に押圧する。At this time, as shown by a two-point chain stopper in FIG. 4, the tip of the pushing rod 38 has a locking portion 13e formed on the peripheral edge of the surface of the plug body 13 in the inclined state facing the locking plate 11. Locked in. Therefore, there is no possibility that the tip end portion of each pushing rod 38 will come off from the plug body 13, and each pushing rod 38 reliably presses the plug body 13.
液体流入防止栓10の係止板11が本管81内周面に強く係止
した状態になると、栓支持部の上昇が停止される。When the locking plate 11 of the liquid inflow prevention plug 10 is strongly locked to the inner peripheral surface of the main pipe 81, the rising of the plug support portion is stopped.
このような状態で、液体流入防止栓10におけるエア注入
管13a内に空気等の気体を送給して、エア注入管13aを介
して栓体13内へ気体を注入して、栓体13を膨張させる。
これにより、該栓体13の外周面が分岐管82内周面に液密
に圧接される。栓体13の外周面が分岐管82内周面に液密
に圧接されると、気体の注入が終了される。栓体13内の
気体はエア注入管13aにおける栓体13内の端部に設けら
れた逆止弁13bにより外部へ流出することが防止され、
該栓体13は膨張状態を維持する。In such a state, a gas such as air is fed into the air injection pipe 13a of the liquid inflow prevention plug 10, and the gas is injected into the plug body 13 through the air injection pipe 13a to remove the plug body 13. Inflate.
As a result, the outer peripheral surface of the plug 13 is liquid-tightly pressed against the inner peripheral surface of the branch pipe 82. When the outer peripheral surface of the stopper 13 is pressure-contacted with the inner peripheral surface of the branch pipe 82 in a liquid-tight manner, the injection of gas is completed. The gas in the plug body 13 is prevented from flowing out to the outside by the check valve 13b provided at the end of the air injection pipe 13a in the plug body 13.
The stopper 13 maintains the expanded state.
このとき、分岐管82内を下水が通流している場合には、
該下水は、栓体13にて囲まれた中央部に流入し、該中央
部に配設された逆止弁15を通って本管81内へと通流す
る。従って、分岐管82内に装着された栓体13により分岐
管82内を通流する下水は止水されず、該栓体13に下水に
より本管81内方向へ圧力が加わるおそれがない。At this time, if sewage is flowing through the branch pipe 82,
The sewage flows into the central portion surrounded by the plug body 13 and flows into the main pipe 81 through the check valve 15 arranged in the central portion. Therefore, the sewage flowing through the branch pipe 82 is not stopped by the plug body 13 mounted in the branch pipe 82, and there is no possibility that the sewage exerts pressure on the plug body 13 toward the inside of the main pipe 81.
その後、液体流入防止栓取付装置の栓支持部が本体部に
対して下降される。これにより、各押込杆38は、栓体13
から離れ、各押込杆38は、液体流入防止栓10の係止板11
の貫通孔11bを通って下方へ移動する。液体流入防止栓1
0の係止板11は、栓体13が分岐管82内周面に圧接されて
位置決めされていることにより、伸縮可能な連結部材12
により牽引されて本管81内周面に密着して係止した状態
が保持される。After that, the stopper support portion of the liquid inflow prevention stopper attachment device is lowered with respect to the main body portion. As a result, each pushing rod 38 has a stopper 13
The push rods 38 are separated from the lock plates 11 of the liquid inflow prevention plug 10.
And moves downward through the through hole 11b. Liquid inflow stopper 1
The locking plate 11 of 0 has the connecting member 12 capable of expanding and contracting because the stopper 13 is positioned by being pressed against the inner peripheral surface of the branch pipe 82.
Thus, the state of being pulled and closely contacted with the inner peripheral surface of the main pipe 81 and locked is maintained.
液体流入防止栓10における係止板11の透孔11aの周囲に
は、第４図にしめすように、本管81を合成樹脂管にてラ
イニングした後に該分岐管82の位置を正確に検知するた
めの被検出体90が配設される。Around the through hole 11a of the locking plate 11 in the liquid inflow prevention plug 10, the position of the branch pipe 82 is accurately detected after the main pipe 81 is lined with a synthetic resin pipe as shown in FIG. An object 90 to be detected is provided.
このようにして、液体流入防止栓10が分岐管82内に装着
されると、分岐管82内を通流する下水が該液体流入防止
栓10の逆止弁15を通って本管81内へ通流した状態で、該
本管81内に合成樹脂製の螺旋管が挿入される。該螺旋管
は、例えば、該本管81の一端が連結されたマンホール内
に設置された製管機により製造される。該製管機には、
合成樹脂製の帯状体が順次導入され、該製管機は、導入
される帯状体を螺旋状に巻回して、巻回された帯状体の
相隣する側縁部同士を係止状態として螺旋管を製造す
る。そして、該製管機により製造された螺旋管が、直
接、本管81内へ挿入される。In this way, when the liquid inflow prevention plug 10 is mounted in the branch pipe 82, the sewage flowing in the branch pipe 82 passes through the check valve 15 of the liquid inflow prevention plug 10 into the main pipe 81. A spiral tube made of synthetic resin is inserted into the main tube 81 in a state where it flows. The spiral pipe is manufactured by, for example, a pipe manufacturing machine installed in a manhole to which one end of the main pipe 81 is connected. The pipe making machine
The synthetic resin strips are successively introduced, and the pipe-making machine spirally winds the strips to be introduced, and spirally holds the adjacent side edges of the wound strips in a locked state. Manufacture tubes. Then, the spiral pipe manufactured by the pipe manufacturing machine is directly inserted into the main pipe 81.
このとき、分岐管82に装着された液体流入防止栓10は、
栓体13が分岐管82内へ完全に押し込められており、係止
板11が連結部材12にて牽引されて本管81内周面に密着し
た状態になっているため、該本管81内に挿入される螺旋
管は、係止板11に引っかかることなく、円滑に該本管81
内に挿入される。本管81内には、分岐管82に装着された
液体流入防止栓10の逆止弁15を通って下水が流入してい
るが、該下水は、螺旋管を本管81内へ挿入する作業に
は、支障がない。該本管81内に螺旋管が挿入されると、
本管81内に流入した下水は、本管81と挿入された螺旋管
との間を通流する。At this time, the liquid inflow prevention plug 10 attached to the branch pipe 82 is
Since the plug body 13 is completely pushed into the branch pipe 82 and the locking plate 11 is pulled by the connecting member 12 to be in close contact with the inner peripheral surface of the main pipe 81, The spiral pipe inserted into the main pipe 81 is smoothly caught without being caught by the locking plate 11.
Inserted inside. Sewage flows into the main pipe 81 through the check valve 15 of the liquid inflow prevention plug 10 attached to the branch pipe 82. The sewage is a work of inserting the spiral pipe into the main pipe 81. There is no hindrance. When a spiral pipe is inserted into the main pipe 81,
The sewage flowing into the main pipe 81 flows between the main pipe 81 and the inserted spiral pipe.
次いで、本管81と螺旋管との間に、裏込め剤が、例え
ば、0.5kgf/cm2程度の圧力により充填される。裏込め剤
は、本管81の一方の端部から、該本管81と螺旋管との間
隙内に充填される。これにより、本管81内の下水は、裏
込め剤にて順次本管81の他方の端部から押し出される。Next, the backfill agent is filled between the main pipe 81 and the spiral pipe by a pressure of, for example, about 0.5 kgf / cm 2 . The backfill agent is filled into the gap between the main pipe 81 and the spiral pipe from one end of the main pipe 81. Thereby, the sewage in the main pipe 81 is sequentially pushed out from the other end of the main pipe 81 by the backfilling agent.
本管81と螺旋管との間に充填される裏込め剤は、該本管
81に連結された分岐管82内へ流入しようとするが、該分
岐管82の端部には、本考案の液体流入防止栓10が装着さ
れているため、該裏込め剤は、液体流入防止栓10の逆止
弁15により、分岐管82内へ浸入することが防止される。The backfill agent filled between the main pipe 81 and the spiral pipe is
Although it tries to flow into the branch pipe 82 connected to 81, since the liquid inflow prevention plug 10 of the present invention is attached to the end of the branch pipe 82, the backfill agent prevents the liquid inflow. The check valve 15 of the stopper 10 prevents entry into the branch pipe 82.
液体流入防止栓10は裏込め剤により全体が分岐管82内へ
押圧されるが、該液体流入防止栓10の係止板11が本管81
内周面に係止した状態になっているため、連結部材12が
伸びる量だけ裏込め剤は分岐管82の内部に流入するが、
該液体流入防止栓10全体が分岐管82内へ押し込まれず、
従って、分岐管82の奥部に裏込め剤が流入するおそれが
ない。The liquid inflow prevention plug 10 is wholly pressed into the branch pipe 82 by the backfill agent, but the locking plate 11 of the liquid inflow prevention plug 10 is connected to the main pipe 81.
Since it is locked to the inner peripheral surface, the backfill agent flows into the branch pipe 82 by the amount by which the connecting member 12 extends.
The entire liquid inflow prevention plug 10 is not pushed into the branch pipe 82,
Therefore, there is no possibility that the backfilling agent will flow into the inner part of the branch pipe 82.
このようにして、裏込め剤が本管81内に充填されると、
該裏込め剤が硬化した後に、分岐管82と螺旋管とが連通
するように、該螺旋管、裏込め剤、および液体流入防止
栓10を挿通する貫通孔が開設される。これにより、本管
81は、合成樹脂製の螺旋管にてライニングされて更生さ
れる。In this way, when the backfill agent is filled in the main pipe 81,
After the backfilling agent is hardened, a through hole for inserting the spiral tube, the backfilling agent, and the liquid inflow prevention plug 10 is opened so that the branch tube 82 and the spiral tube are in communication with each other. This allows the main
81 is lined with a spiral tube made of synthetic resin and rehabilitated.
なお、上記実施例では、液体流入防止栓10の栓体13が内
部に逆止弁15を有する円環状の中空体について説明した
が、本考案の液体流入防止栓は、このような栓体に限定
されるものではなく、例えば、逆止弁を有さない円柱状
の中空体や、ゴム製の中実体であってもよい。In addition, in the above embodiment, the plug 13 of the liquid inflow prevention plug 10 has been described as the annular hollow body having the check valve 15 therein, but the liquid inflow prevention plug of the present invention is not limited to such a plug. It is not limited, and may be, for example, a cylindrical hollow body having no check valve or a rubber solid body.
（考案の効果） 本考案の液体流入防止栓は、このように、栓体と係止板
とが伸縮可能な連結部材にて連結されているため、本管
に対して分岐管が傾斜した状態になっていても、栓体が
確実に分岐管内に押し込められる。栓体が分岐管内に押
し込められると、係止板が連結部材により牽引されて、
該係止板が本管内周面に密着した状態で係止されるた
め、本管内に管を挿入する場合にも該係止板に挿入され
る管が引っかかるおそれがなく、本管内への管の挿入作
業を円滑に行うことができる。栓体の係止板に対向する
面の周縁部には、該係止板に向かって突出する係止部が
設けられているため、該栓体を分岐管内に押し込む押込
部材は該栓体との当接状態がはずれるおそれがなく、栓
体を確実に分岐管内に押し込むことができる。(Effects of the Invention) In the liquid inflow prevention plug of the present invention, the branch pipe is inclined with respect to the main pipe because the plug body and the locking plate are connected by the expandable / contractible connecting member. Even if it is set, the stopper can be reliably pushed into the branch pipe. When the stopper is pushed into the branch pipe, the locking plate is pulled by the connecting member,
Since the locking plate is locked in close contact with the inner peripheral surface of the main pipe, even when the pipe is inserted into the main pipe, there is no risk of the pipe inserted into the locking plate being caught, Can be smoothly inserted. Since a locking portion that projects toward the locking plate is provided at the peripheral edge of the surface of the plug that faces the locking plate, the pushing member that pushes the plug into the branch pipe is There is no risk that the contact state of the plug will come off, and the plug can be reliably pushed into the branch pipe.
第１図は本考案の液体流入防止栓の断面図、第２図はそ
の側面図、第３図はその底面図、第４図は液体流入防止
栓を分岐管に装着した状態を示す断面図である。 10…液体流入防止栓、11…係止板、11a…透孔、11b…貫
通孔、12…連結部材、13…栓体、13e…係止部、15…逆
止弁。1 is a sectional view of the liquid inflow prevention plug of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a bottom view thereof, and FIG. 4 is a sectional view showing a state in which the liquid inflow prevention plug is attached to a branch pipe. Is. 10 ... Liquid inflow prevention plug, 11 ... Locking plate, 11a ... Through hole, 11b ... Through hole, 12 ... Connection member, 13 ... Plug body, 13e ... Locking part, 15 ... Check valve.
Claims (1)
る端部に装着されて、液体の流入を防止する液体流入防
止栓であって、 該分岐管の該端部内に嵌合されて該端部内周面に液密に
圧接される栓体と、 該栓体が分岐管の該端部内周面に圧接された状態で該分
岐管端部の開口端周縁部である本管内周面に係止される
ように該栓体に対向して配設された係止板と、 該栓体と該係止板とを連結する伸縮可能な連結部材と、
を具備し、 該係止板には、本管内周面に係止した該係止板に対して
該栓体を分岐管の内奥側に遠ざけるべく該栓体を押込む
押込部材が挿通し得る貫通孔が開設されているととも
に、前記栓体の前記係止板に対向する面の周縁部には、
該押込部材が係止されるように該係止板に向けて突出す
る係止部が設けられていることを特徴とする液体流入防
止栓。1. A liquid inflow prevention plug, which is attached to an end portion of a branch pipe branched from the main pipe and communicates with the main pipe, the liquid inflow prevention plug being fitted into the end portion of the branch pipe. And a main body that is a liquid-tightly pressed contact with the inner peripheral surface of the end, and a main body that is a peripheral edge of the opening end of the branch pipe in a state where the stopper is pressed against the inner peripheral surface of the end of the branch pipe. A locking plate arranged to face the stopper so as to be locked to the peripheral surface, and an expandable and contractable connecting member for connecting the stopper and the locking plate,
A push-in member for pushing the plug body is inserted into the locking plate so as to move the plug body toward the inner depth side of the branch pipe with respect to the locking plate locked on the inner peripheral surface of the main pipe. A through hole to be obtained is opened, and the peripheral edge of the surface of the plug body facing the locking plate is
A liquid inflow prevention plug, comprising: a locking portion that projects toward the locking plate so that the pushing member is locked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11511489U JPH0720476Y2 (en) | 1989-09-30 | 1989-09-30 | Liquid inflow prevention plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11511489U JPH0720476Y2 (en) | 1989-09-30 | 1989-09-30 | Liquid inflow prevention plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0353699U JPH0353699U (en) | 1991-05-23 |
| JPH0720476Y2 true JPH0720476Y2 (en) | 1995-05-15 |
Family
ID=31663455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11511489U Expired - Lifetime JPH0720476Y2 (en) | 1989-09-30 | 1989-09-30 | Liquid inflow prevention plug |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720476Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2567324B2 (en) * | 1992-05-27 | 1996-12-25 | 英 鎬 金 | Compression pulverizer |
-
1989
- 1989-09-30 JP JP11511489U patent/JPH0720476Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0353699U (en) | 1991-05-23 |
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