JP4493483B2 - Expansion band and connection structure of flexible joint for manhole - Google Patents

Expansion band and connection structure of flexible joint for manhole Download PDF

Info

Publication number
JP4493483B2
JP4493483B2 JP2004343955A JP2004343955A JP4493483B2 JP 4493483 B2 JP4493483 B2 JP 4493483B2 JP 2004343955 A JP2004343955 A JP 2004343955A JP 2004343955 A JP2004343955 A JP 2004343955A JP 4493483 B2 JP4493483 B2 JP 4493483B2
Authority
JP
Japan
Prior art keywords
annular member
manhole
expansion
flexible joint
band
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.)
Active
Application number
JP2004343955A
Other languages
Japanese (ja)
Other versions
JP2006152653A (en
Inventor
秀夫 田中
太 井上
文夫 門田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hayakawa Rubber Co Ltd
Original Assignee
Hayakawa Rubber Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hayakawa Rubber Co Ltd filed Critical Hayakawa Rubber Co Ltd
Priority to JP2004343955A priority Critical patent/JP4493483B2/en
Publication of JP2006152653A publication Critical patent/JP2006152653A/en
Application granted granted Critical
Publication of JP4493483B2 publication Critical patent/JP4493483B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Sewage (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Description

本発明は、マンホールの削孔部と筒状可とう継手との接続に用いる拡張バンド、及びかかる拡張バンドを用いるマンホールの削孔部と筒状可とう継手との接続構造に関し、更に詳しくは、可とう継手をマンホール、特に、薄壁構造型マンホールの削孔部に固定するために用いる拡張バンド又はマンホール径に比して削孔径が大きく、通常の拡張バンドが適用できない場合に用いられる拡張バンド、及びかかる拡張バンドを用いて得られるマンホールと管との接続構造に関する。   The present invention relates to an expansion band used for connection between a drilling portion of a manhole and a cylindrical flexible joint, and a connection structure between the drilling portion of a manhole using such an expansion band and a cylindrical flexible joint. Expansion band used for fixing flexible joints to manholes, especially thin wall structure type manholes, or expansion bands that have a larger hole diameter than manhole diameters and cannot be used with normal expansion bands And a connecting structure between a manhole and a tube obtained by using such an extension band.

従来、マンホールと下水管等の管との接続部に対しては、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、地盤沈下や地震等の地盤の歪で、管とマンホール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、破壊したりして、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, concrete has been applied to a connecting portion between a manhole and a pipe such as a sewage pipe, in which concrete is placed and wound up. However, if the relative position of the pipe and manhole is displaced due to ground subsidence or earthquakes, the concrete winding part cracks or breaks, causing unknown water intrusion or sewage leakage. There was a drawback.

最近では、マンホールと本管の相対的位置が変位しても、その変位を吸収し、止水性も維持できる、ゴム製可とう継手が多く用いられるようになった（例えば、特許文献１参照）。また、薄壁構造形のマンホール等の側面孔用の可とう継手が考案されている（例えば、特許文献２参照）。
実開平７−４５４７号公報 特開２００３−２０６６６号公報 Recently, even if the relative positions of the manhole and the main pipe are displaced, rubber flexible joints that can absorb the displacement and maintain water-stopping properties have come to be used (see, for example, Patent Document 1). . Further, a flexible joint for side holes such as manholes having a thin wall structure has been devised (see, for example, Patent Document 2).
Japanese Utility Model Publication No. 7-4547 JP 2003-20666 A

前述の特許文献１では、可とう継手は、マンホール削孔部に平面の拡張バンドで固定されている。他の従来の拡張バンドも、拡張方法や拡張状態を固定する方法は異なるが、押圧面が平面の帯状バンドを拡張するのが一般的である。図１０は、従来の１例のマンホールの接続構造の断面図である。図１１は、従来の１例の拡張バンドの断面図である。   In Patent Document 1 described above, the flexible joint is fixed to the manhole drilling portion with a flat extension band. Other conventional expansion bands are different from each other in the expansion method and the method of fixing the expanded state, but generally, the band-shaped band having a flat pressing surface is expanded. FIG. 10 is a cross-sectional view of an example of a conventional manhole connection structure. FIG. 11 is a cross-sectional view of a conventional example of an expansion band.

図１０に示すように、マンホール接続構造１０１では、拡張バンドとしての拡張金具１０２によって、マンホール１０３の削孔部１０３Ａに、可とう継手１０４の取付けが行われる。また、図１１に示すように、拡径金具１０２は、平面リング状であり、削孔断面空間内で、折り曲げ金具１０２Ａを押し拡げ、可とう継手１０３を削孔部１２Ａに圧着固定する。かかる手法は、マンホールの壁厚が大きいか、削孔径が小さい場合、平面リング状の拡張バンドが削孔断面空間内よりはみ出すことなく、可とう継手を削孔面に拡張圧着し固定でき、安定した止水構造をとる。   As shown in FIG. 10, in the manhole connection structure 101, the flexible joint 104 is attached to the drilled portion 103 </ b> A of the manhole 103 by the extension fitting 102 as an extension band. Moreover, as shown in FIG. 11, the diameter expansion metal fitting 102 is a plane ring shape, and the bending metal fitting 102A is squeezed and expanded in the hole cross section space, and the flexible joint 103 is fixed to the hole making part 12A by pressure bonding. This method is stable when the wall thickness of the manhole is large or the drilling hole diameter is small, and the flexible joint can be fixed by expanding and crimping to the drilling surface without the flat ring-shaped extension band protruding from the drilling section space. Take a water stop structure.

しかしながら、マンホールの壁厚が薄い場合や、マンホール径に比して削孔径が大きい場合においては、平面リング状の拡張バンドが削孔断面空間内よりはみ出すため、拡張力がはみ出し部において抜け、また、可とう継手の圧着もできなくなる。よって、安定した止水構造がとれず、拡張バンドを安定した状態で適用できない。   However, when the wall thickness of the manhole is thin, or when the drilling diameter is larger than the manhole diameter, the planar ring-shaped expansion band protrudes from the drilling cross-sectional space, so that the expansion force falls off at the protruding part, and Also, the flexible joint cannot be crimped. Therefore, a stable water stop structure cannot be obtained, and the extension band cannot be applied in a stable state.

特許文献２では、薄壁構造型マンホール等において、中筒を有する取付板を側面孔の内側に当て付けて、中筒を側面孔外に突出させ、中筒の外側より無端のリング状ワッシャー体を嵌付け、側面孔壁を取付板とワッシャー体とで挟みつけて取付板を固定し、中筒の先端部に、可とう継手を締め付けバンドで取り付けて、可とう性構造をとる。図１２はこの例のマンホール構造の断面図である。   In Patent Document 2, in a thin wall structure type manhole or the like, an attachment plate having an inner cylinder is applied to the inside of the side hole, the inner cylinder protrudes outside the side hole, and the ring-shaped washer body is endless from the outer side of the inner cylinder. Is attached, the side hole wall is sandwiched between the attachment plate and the washer body, the attachment plate is fixed, and a flexible joint is attached to the distal end portion of the middle cylinder with a tightening band to obtain a flexible structure. FIG. 12 is a cross-sectional view of the manhole structure of this example.

なお、特許文献２のものは、特許文献１のような平面拡張バンドを用いないもので、特許文献１のような平面リング状バンドが使用できない場合、例えば、上述のように特許文献１の平面拡張バンドの欠点が現れる場合、すなわち、平面拡張バンドがマンホール削孔断面空間内に納まらず、はみ出し、拡張時にバンドが抜け出るような場合、特に、薄壁構造型マンホール等において顕著になるかかる平面拡張バンドの欠点を排除する場合に、有用なものである。つまり、特許文献２のものは、図１２に示すように、薄壁構造形マンホール２０１に、中筒２０５を有する取付板２０４を、側面孔２０６の内側に当て付け、中筒２０５を側面孔２０６外に突出させ、中筒２０５の外側よりワッシャー体２０７を嵌付けて、側面孔２０６の壁を、取付板２０４とワッシャー体２０７にて挟みつけ、取付板２０４を固定し、中筒２０５の先端部に可とう継手２０３を取付け、管２０２と薄壁構造形マンホール２０１間の止水可とう継手構造をとる。   In addition, the thing of patent document 2 is a thing which does not use a plane expansion band like patent document 1, and when a plane ring-shaped band like patent document 1 cannot be used, for example, as mentioned above, the plane of patent document 1 is used. If the extension band appears to be defective, that is, if the plane extension band does not fit in the manhole drilling cross-section space, it protrudes and the band escapes during expansion, especially in the case of thin-walled manholes, etc. This is useful in eliminating the shortcomings of the band. That is, in Patent Document 2, as shown in FIG. 12, the attachment plate 204 having the middle cylinder 205 is applied to the thin wall structure type manhole 201 inside the side hole 206, and the middle cylinder 205 is placed on the side hole 206. The washer body 207 is fitted from the outside of the middle cylinder 205, the wall of the side hole 206 is sandwiched between the mounting plate 204 and the washer body 207, the mounting plate 204 is fixed, and the tip of the middle cylinder 205 is fixed. A flexible joint 203 is attached to the portion, and a water-stopping flexible joint structure between the pipe 202 and the thin wall type manhole 201 is formed.

特許文献２では、マンホール２０１の内面空間を取付板２０４が侵すため、設計流下量の見直しが必要であり、取付けも、マンホールの内側と外側とで作業することが必要で、煩雑であり、部品の複雑な加工を要し、コスト高になる欠点がある。   In Patent Document 2, since the mounting plate 204 invades the inner space of the manhole 201, it is necessary to review the design flow amount, and it is necessary to work on the inner side and the outer side of the manhole. However, there is a disadvantage that it requires complicated processing and increases the cost.

本発明の課題は、マンホールの削孔部と筒状可とう継手との接続において、マンホールの壁厚や削孔径等によらないで、安定した接続状態を提供できる拡張バンドを得ることである。
また、本発明の課題は、マンホールの削孔部と筒状可とう継手とが拡張バンドによって接続されている接続構造において、マンホールの壁厚や削孔径等によらないで、安定した接続状態を提供することである。 An object of the present invention is to obtain an expansion band that can provide a stable connection state without depending on the wall thickness of the manhole, the diameter of the drilling hole, or the like in the connection between the drilling portion of the manhole and the cylindrical flexible joint.
In addition, the problem of the present invention is that in a connection structure in which the drilling portion of the manhole and the cylindrical flexible joint are connected by an extension band, a stable connection state can be obtained without depending on the wall thickness of the manhole or the diameter of the drilling hole. Is to provide.

本発明は、マンホールの削孔部と筒状可とう継手との接続に用いる拡張バンドにおいて、断面が略円形の棒状体により形成される環状部材と、前記環状部材を拡径する拡径手段とを具えてなり、前記環状部材が、少なくとも１ヶ所に切断部を有し、前記削孔部の内面に沿うような湾曲形状を有し、前記拡径手段によって、前記環状部材の前記切断部の隙間が拡大し、前記環状部材が拡径される、拡張バンド及びかかる拡張バンドを用いる接続構造に係るものである。   The present invention relates to an expansion band used for connecting a drilling portion of a manhole and a cylindrical flexible joint, an annular member formed by a rod-shaped body having a substantially circular cross section, and a diameter expanding means for expanding the annular member. The annular member has a cutting portion at least at one location, has a curved shape along the inner surface of the hole-drilling portion, and the diameter expanding means allows the cutting portion of the annular member to be The present invention relates to an expansion band and a connection structure using the expansion band in which a gap is expanded and the annular member is expanded in diameter.

本発明は、上記の問題点を解決するために開発したもので、拡張バンドが、断面略円形の棒状体より形成される所定の湾曲形状を有する環状部材を具えてなり、マンホールの削孔部と可とう継手との接続において、マンホールの壁厚や削孔径等によらないで、安定した接続状態を提供できるという知見に基づくものである。すなわち、本発明は、所定の拡張バンドが、可とう継手を、マンホール、特に、薄壁構造型マンホールの削孔部に固定するのに適し、また、マンホール径に比して削孔径が大きく通常の拡張バンドが適用できない場合等に用いるのにも適しているという知見に基づく。   The present invention has been developed to solve the above-described problems, and the expansion band comprises an annular member having a predetermined curved shape formed from a rod-like body having a substantially circular cross section, and a drilling portion of a manhole. This is based on the knowledge that a stable connection state can be provided regardless of the wall thickness of the manhole, the diameter of the drilled hole, or the like in connection with the flexible joint. That is, the present invention is suitable for fixing a flexible joint to a manhole, in particular, a drilling portion of a thin-walled structure type manhole, and having a larger drilling diameter than the manhole diameter. It is based on the knowledge that it is also suitable for use when the extension band cannot be applied.

本発明の拡張バンドは、断面略円形の棒状体より形成される所定の湾曲形状の環状部材を具えてなるので、マンホール径に比して大きな径の削孔部や薄壁構造型マンホールの削孔部においても、筒状可とう継手を安定した接続状態で固定することができる。   The expansion band of the present invention comprises an annular member having a predetermined curved shape formed from a rod-shaped body having a substantially circular cross section. Therefore, a drilling portion having a diameter larger than the manhole diameter or a thin wall structure type manhole is cut. Also in the hole portion, the cylindrical flexible joint can be fixed in a stable connection state.

本発明の実施をする形態について説明する。
（１）（マンホール）
マンホールは、特に制限されず、種々の形状、材質等のものが包含される。マンホールは、代表的には、筒状のものである。筒状とは、外周の壁部とその壁部に囲まれた内部空間とを有する形状をいう。筒状のマンホールには、外形又は内形の少なくとも１方において、断面が、楕円形、矩形、多角形等のものや、これらの組合せのものも包含される。筒状には、円筒が含まれる。 An embodiment for carrying out the present invention will be described.
(1) (Manhole)
The manhole is not particularly limited, and includes various shapes and materials. The manhole is typically cylindrical. The cylindrical shape means a shape having an outer peripheral wall portion and an internal space surrounded by the wall portion. The cylindrical manhole includes an elliptical shape, a rectangular shape, a polygonal shape, or a combination thereof in at least one of the outer shape and the inner shape. The cylinder includes a cylinder.

筒状のマンホールは、主として、その外周の壁部が、外形及び内形において、断面で見て、略円形のものである。かかるマンホールを略円形マンホールと称する。略円形としては、円形の他、楕円形等が包含され、場合によっては、円に近似する形状で、矩形、多角形等や、これらの組合せの形状も包含される。   The cylindrical manhole has a substantially circular outer peripheral wall portion when viewed in cross section in the outer shape and the inner shape. Such a manhole is called a substantially circular manhole. As a substantially circular shape, an ellipse or the like is included in addition to a circular shape. In some cases, a shape that approximates a circle, such as a rectangle, a polygon, or a combination thereof is also included.

マンホールには、マンホール径に比して大きな径の削孔部を有するマンホールや薄壁構造型マンホールが包含される。マンホールは、代表的に、コンクリート製やレジンコンクリート製である。   The manhole includes a manhole having a hole having a diameter larger than the manhole diameter and a thin wall type manhole. The manhole is typically made of concrete or resin concrete.

（２）（削孔部）
削孔部は、マンホールの種々の位置に設けることができる。削孔部は、孔の大きさ、形状、形成手段等、特に制限されない。削孔部は、代表的に、略円形の孔として形成される。略円形には、上述のように、円形、楕円形等、円に近似する形状も包含される。削孔部は種々の方法によって作製することができる。 (2) (Drilling part)
The drilling portion can be provided at various positions of the manhole. The hole drilling part is not particularly limited in terms of hole size, shape, forming means and the like. The drilling portion is typically formed as a substantially circular hole. As described above, the substantially circular shape includes a shape that approximates a circle, such as a circle or an ellipse. The hole drilling part can be produced by various methods.

削孔部は、主として、マンホールを管と連通させるものである。連通させる管が下水道等の管の場合、削孔部はマンホールの側壁に開けられることが多い。断面が略円形のマンホールの側壁に削孔部が設けられる場合、削孔部の内面は、マンホールの側壁の湾曲に沿って３次元的に湾曲する。   The hole drilling part is mainly for communicating the manhole with the pipe. When the pipe | tube to communicate is pipes, such as a sewer, a drilling part is often opened in the side wall of a manhole. When a drilling portion is provided on the side wall of a manhole having a substantially circular cross section, the inner surface of the drilling portion is curved three-dimensionally along the curvature of the side wall of the manhole.

（３）（管）
管は、特に制限されず、種々の種類、口径や形状、材質等からなるものが包含される。管は、主として、断面が略円形のものである。略円形には、上述の楕円形等、円に近似する形状のものが包含される。通常、マンホールの削孔部は、かかる管の外形に応じて設計される。管は、代表的に、下水道管である。 (3) (Tube)
The pipe is not particularly limited, and includes pipes made of various types, calibers, shapes, materials, and the like. The tube is mainly of a substantially circular cross section. The substantially circular shape includes a shape that approximates a circle, such as the above-described ellipse. Usually, the drilling part of a manhole is designed according to the external shape of this pipe | tube. The pipe is typically a sewer pipe.

（４）（可とう継手）
可とう継手はマンホールと接続すべき管との接続部、主として、マンホールの削孔部の内面と接続すべき管との間に設けられる。マンホールは、削孔部において管と接続されるが、削孔部と管との間には、通常、可とう性や止水性等が要求されるため、止水可とう継手が用いられる。可とう継手は、従来から用いられる種々の継手でよい。 (4) (Flexible joint)
The flexible joint is provided between the connection portion between the manhole and the tube to be connected, mainly between the inner surface of the drilling portion of the manhole and the tube to be connected. The manhole is connected to the pipe at the hole drilling portion. However, since a flexibility or water-stopping property is usually required between the hole drilling portion and the pipe, a water-stopping flexible joint is used. The flexible joint may be a variety of conventionally used joints.

可とう継手は、代表的に、筒状である。かかる可とう継手を筒状可とう継手と称する。筒状とは、外周の壁部とその壁部に囲まれた内部空間を有する形状をいう。外周の壁部は、主として、外形及び内形において、断面で見て、略円形のものを指す。筒状には、円筒が含まれる。筒状可とう継手は、一端が削孔部の内面に固定され、他端は管の外面に固定される。   The flexible joint is typically cylindrical. Such a flexible joint is referred to as a cylindrical flexible joint. The cylindrical shape means a shape having an outer peripheral wall portion and an internal space surrounded by the wall portion. The outer peripheral wall portion mainly indicates a substantially circular shape when viewed in cross section in the outer shape and the inner shape. The cylinder includes a cylinder. One end of the cylindrical flexible joint is fixed to the inner surface of the drilling portion, and the other end is fixed to the outer surface of the pipe.

筒状可とう継手は、削孔側筒状部等を具えることができる。削孔側筒状部は、拡張バンドによって、マンホールの削孔部の内面に接続される。また、筒状可とう継手は、管側筒状部等を具えることができる。管側筒状部は、締結バンド等の接続具によって、管の外面に接続される。   The cylindrical flexible joint can include a drilled side cylindrical portion or the like. The hole side cylindrical portion is connected to the inner surface of the hole portion of the manhole by an extension band. Further, the tubular flexible joint can include a tube-side tubular portion and the like. The tube side tubular portion is connected to the outer surface of the tube by a connecting tool such as a fastening band.

締結バンドは、剛性体の材質からなることができ、剛性材料としては、ステンレス鋼、アルミニウム、防錆メッキ鋼、防錆被覆鋼材等の金属や、塩化ビニル樹脂、アクリロニトリルブタジエンスチレン（ＡＢＳ）樹脂や、ポリエチレンテレフタレート（ＰＥＴ又はＰＥＴＰ）等の硬質プラスチック、繊維強化プラスチック（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種を用いることができる。これらの各材料は、腐食し難いので望ましい。   The fastening band can be made of a rigid body material, such as stainless steel, aluminum, rust-proof plated steel, rust-coated steel, vinyl chloride resin, acrylonitrile butadiene styrene (ABS) resin, etc. Further, at least one selected from the group consisting of hard plastics such as polyethylene terephthalate (PET or PETP), fiber reinforced plastics such as fiber reinforced plastic (FRP), and the like can be used. Each of these materials is desirable because it is difficult to corrode.

削孔側筒状部には、鍔部を設けることができる。鍔部は、可とう継手と削孔部との間の水密性を高めるのに用いることができる。鍔部は、複数設けることができ、マンホールの削孔部壁の内面側及び外面側の少なくとも１方に設けることができるが、好ましくは、マンホール内の流体の流れを妨げないように、削孔部壁の外面において設け、削孔部壁に接触させることができる。   A flange portion can be provided on the drilling side cylindrical portion. The collar portion can be used to enhance the water tightness between the flexible joint and the hole drilling portion. A plurality of flanges can be provided, and can be provided on at least one of the inner surface side and the outer surface side of the hole wall of the manhole. Preferably, the hole hole is formed so as not to disturb the flow of fluid in the manhole. It can be provided on the outer surface of the part wall and brought into contact with the holed part wall.

削孔側筒状部は、削孔部の内面に沿うような湾曲形状を有することができる。かかる削孔側筒状部は、マンホール内の流体の流れ等を、妨げることなく、円滑にすることができる。   The hole-drilling cylindrical portion can have a curved shape along the inner surface of the hole-drilling portion. Such a cylindrical portion on the hole side can be made smooth without hindering the flow of fluid in the manhole.

削孔側筒状部には、その内面に溝部を設けることができる。溝部は、断面が半円形等、拡張バンドを位置決めできるような形状を有することができる。溝部は、削孔側筒状部の内面の全周にわたって設けることができ、その際、全周にわたって、削孔部の内面に沿うような湾曲形状を有することができる。   A groove portion can be provided on the inner surface of the drilling side cylindrical portion. The groove portion may have a shape such as a semicircular cross section that can position the expansion band. A groove part can be provided over the perimeter of the inner surface of a hole side cylindrical part, and can have a curved shape which follows the inner surface of a hole part over the perimeter in that case.

拡張バンドは、少なくとも１部が溝部内に位置決めされた状態で拡径することができる。拡張バンドを溝部内で拡径させることができれば、拡張バンドが可とう継手上を無制限に滑る等の危険性を抑えることができ、また、削孔側筒状部をより一層安定した状態で削孔部の内面に接続し固定することができる。   The expansion band can be expanded in a state where at least one part is positioned in the groove. If the expansion band can be expanded in the groove, the danger of the expansion band sliding on the flexible joint without limitation can be suppressed, and the drilling side tubular portion can be cut in a more stable state. It can be connected and fixed to the inner surface of the hole.

筒状可とう継手は、削孔側筒状部と管側筒状部とを繋ぐ連結部等を具えることができる。連結部には、伸縮をより一層高める伸縮部を設けることができる。筒状可とう継手は、削孔側筒状部、管側筒状部及び連結部等を一体にして一体成形することができる。   The cylindrical flexible joint can include a connecting portion that connects the hole-side cylindrical portion and the tube-side cylindrical portion. The connecting portion can be provided with an expansion / contraction portion that further increases the expansion / contraction. The cylindrical flexible joint can be integrally formed by integrating the hole side cylindrical portion, the tube side cylindrical portion, the connecting portion, and the like.

可とう継手は、種々の材料から形成することができる。可とう継手は、代表的に、弾性体製、特に、ゴム製のものである。可とう継手の本体は、スチレン・ブタジエンゴム、エチレン・プロピレン・ジエン・ターポリマー（ＥＰＤＭ）、クロロプレンゴム（ＣＲ）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種からなることができる。   The flexible joint can be formed from a variety of materials. The flexible joint is typically made of an elastic material, particularly rubber. The main body of the flexible joint is synthetic rubber such as styrene / butadiene rubber, ethylene / propylene / diene / terpolymer (EPDM), chloroprene rubber (CR), natural rubber, soft vinyl chloride resin, vinyl chloride elastomer, styrene It can consist of at least 1 sort (s) chosen from the group which consists of a thermoplastic elastomer etc.

（５）（拡張バンド）
拡張バンドは、マンホールの削孔部と可とう継手との接続に用いる。拡張バンドは、可とう継手の内面に配置され、拡径によって可とう継手を削孔部の内面に圧着させ、固定することができる。拡張バンドは、断面が略円形の棒状体により形成される環状部材と、この環状部材を拡径する拡径手段とを具えてなる。 (5) (Extended band)
The expansion band is used to connect the drilling portion of the manhole and the flexible joint. The expansion band is disposed on the inner surface of the flexible joint, and can be fixed by crimping the flexible joint to the inner surface of the drilled hole portion by expanding the diameter. The expansion band includes an annular member formed of a rod-shaped body having a substantially circular cross section, and a diameter expanding means for expanding the diameter of the annular member.

（５−１）（環状部材）
環状部材において、環状とは、環のような形のことをいい、輪、螺旋等、それらの複合形状が含まれる。かかる形状は、可とう継手をマンホールの削孔部に密着性よく固定できる形状であればよい。環状部材は、少なくとも１ヶ所に切断部を有している。環状部材の切断部は、拡径手段によって、その隙間が拡大され、環状部材が拡径される。 (5-1) (annular member)
In the annular member, the term “annular” refers to a shape like a ring, and includes complex shapes such as a ring and a spiral. Such a shape may be any shape as long as the flexible joint can be fixed to the drilling portion of the manhole with good adhesion. The annular member has a cutting part in at least one place. The gap of the cut portion of the annular member is enlarged by the diameter expanding means, and the diameter of the annular member is expanded.

環状部材は複数の切断部を有することができる。かかる場合、環状部材は複数のセグメントからなり、各セグメントを組み合せたものが、全体として、環状部材となる。かかる場合、環状部材の各セグメントの端部間の隙間を拡大して、環状部材を拡径することができる。   The annular member can have a plurality of cut portions. In such a case, the annular member is composed of a plurality of segments, and a combination of the segments becomes an annular member as a whole. In such a case, the gap between the end portions of each segment of the annular member can be enlarged to enlarge the diameter of the annular member.

環状部材は、マンホールの削孔部の内面に沿うような湾曲形状を有する。かかる形状は、３次元的に湾曲した形状を包含する。かかる形状は、拡張バンドによって、可とう継手を削孔部の内面に安定した状態で接続するのに必要である。かかる形状は、予め、拡径前の環状部材が有するものでよく、拡径後に、削孔部の内面に沿うような形状となり、可とう継手を削孔部の内面に安定した状態で接続できるものでもよい。   The annular member has a curved shape along the inner surface of the drilling portion of the manhole. Such a shape includes a three-dimensionally curved shape. Such a shape is necessary to connect the flexible joint to the inner surface of the drilled hole in a stable state by the extension band. Such a shape may be previously possessed by the annular member before the diameter expansion, and after the diameter expansion, the shape follows the inner surface of the drilled portion, and the flexible joint can be stably connected to the inner surface of the drilled portion. It may be a thing.

円筒形等のマンホールの側壁に削孔部を形成する場合、その削孔部の内面は、平坦なコンクリート壁に孔を開けたような形態ではなく、円筒の左右部分と上下部分とで削孔部の内面が前後にずれる形状となる。かかる削孔部内面の形状は、マンホール径に比して大きな径の削孔部を有するマンホールにおいて顕著となる。かかる場合には、マンホールの削孔部の内面に沿うような湾曲形状を有する環状部材の利点が有効に働く。従来のように、拡張バンドが真円に近い２次元的な形状でしかない場合、マンホール削孔断面空間内に納まらず、はみ出し、拡張時及び拡張後等においては、バンドが抜け出ることがある。また、かかる拡張バンドの欠点は、薄壁構造型マンホール等においても顕著である。   When forming a hole in the side wall of a cylindrical manhole, the inner surface of the hole is not shaped like a hole in a flat concrete wall. It becomes the shape where the inner surface of a part shifts back and forth. Such a shape of the inner surface of the drilled portion becomes conspicuous in a manhole having a drilled portion having a diameter larger than that of the manhole. In such a case, the advantage of the annular member having a curved shape along the inner surface of the drilling portion of the manhole works effectively. If the expansion band has only a two-dimensional shape close to a perfect circle as in the prior art, the band may not fit within the manhole drilling cross-sectional space, and the band may come off during expansion or after expansion. Further, the disadvantage of such an extension band is remarkable even in a thin wall type manhole.

（５−２）（棒状体）
環状部材は、断面が略円形の棒状体により形成される。断面が略円形は、主として、断面、特に、その外形が円形であることを指す。断面の外形は、円形の他、楕円形等が包含され、場合によっては、円に近似する形状で、多角形等や、これらの組合せの形状も包含される。棒状体は、例えば、中実構造のものであるが、管のような中空構造、多層構造等であってもよい。中空構造等の棒状体の場合には、その外形が断面略円形であればよい。 (5-2) (Bar-shaped body)
The annular member is formed of a rod-like body having a substantially circular cross section. The substantially circular cross section mainly means that the cross section, in particular, its outer shape is circular. The outer shape of the cross section includes a circle, an ellipse, and the like, and in some cases, a shape that approximates a circle, such as a polygon or a combination thereof. The rod-shaped body has, for example, a solid structure, but may have a hollow structure such as a tube or a multilayer structure. In the case of a rod-like body having a hollow structure or the like, the outer shape thereof may be substantially circular in cross section.

断面が略円形の棒状体は、環状部材を拡径して、可とう継手をマンホールの削孔部に接続する際、可とう継手を削孔部の内面に安定した状態で接続することができる。かかる棒状体は、環状部材の拡径によってねじれることが少なく、また、ねじれたとしても、断面が略円形の状態を保持し、安定した状態で拡径することができる。   The rod-like body having a substantially circular cross section can connect the flexible joint to the inner surface of the drilled portion in a stable state when expanding the annular member and connecting the flexible joint to the drilled portion of the manhole. . Such a rod-shaped body is less likely to be twisted due to the expansion of the diameter of the annular member, and even if it is twisted, it can maintain a substantially circular cross section and can be expanded in a stable state.

また、かかる棒状体は、環状部材の拡径によってねじれたとしても、断面が略円形の棒状体として、安定した状態で、削孔部の内面に沿うことができ、また、可とう継手を削孔部の内面に沿って接続し、固定することができる。従来のように押圧面が平面の平板状のバンドでは、拡径の際、拡径によってねじれた場合等、可とう継手との接触部が平面でない部分が生じ、押圧面が平面である部分と平面でない部分とにおいて、拡張バンドの拡張力が不均一になって漏水等が発生したり、また、可とう継手に加わる応力の不均一によって、可とう性継手が破断したり、耐久性に問題が生じたりする。   In addition, even if such a rod-like body is twisted by expanding the diameter of the annular member, the rod-like body having a substantially circular cross section can be stably provided along the inner surface of the drilled hole portion, and the flexible joint can be cut. It can be connected and fixed along the inner surface of the hole. In the case of a flat band with a flat pressing surface as in the past, when the diameter is expanded, a portion where the contact portion with the flexible joint is not flat, such as when twisted by the expansion, occurs, and the pressing surface is a flat portion The expansion force of the expansion band becomes non-uniform on the non-planar part, causing water leakage, etc., and the non-uniform stress applied to the flexible joint may cause the flexible joint to break or have problems with durability. May occur.

棒状体は、前述したような、剛性材料、特に、硬質樹脂、硬質プラスチック、繊維補強プラスチック、腐食し難い金属類等から形成することができる。   The rod-shaped body can be formed of a rigid material as described above, in particular, a hard resin, a hard plastic, a fiber-reinforced plastic, a metal that hardly corrodes, or the like.

（５−３）（拡径手段）
拡径手段は、環状部材の切断部の隙間を拡大し環状部材を拡径するものである。かかる拡径手段には、種々の拡張方法が包含され、環状部材の拡径状態を固定する手段も包含される。 (5-3) (Diameter expanding means)
The diameter-expanding means expands the gap of the cut portion of the annular member and expands the diameter of the annular member. The diameter expanding means includes various expanding methods, and includes means for fixing the expanded diameter state of the annular member.

拡径手段においては、特に制限されず、種々の拡張治具を用いることができる。拡張治具としては、例えば、拡張爪等の拡張部分を有するジャッキ等の拡張装置を用いることができる。かかる場合、環状部材の切断部の両端部には、拡張治具の拡張部分と係合する拡張用突起を設けることができる。   The diameter expansion means is not particularly limited, and various expansion jigs can be used. As the expansion jig, for example, an expansion device such as a jack having an expansion portion such as an expansion claw can be used. In such a case, expansion projections that engage with the expansion portion of the expansion jig can be provided at both ends of the cut portion of the annular member.

拡径手段としては、剛性ガイドを用いることができる。剛性ガイドは、環状部材の切断部の両端部を収め、拡張バンドの拡径の際、剛性ガイド内での各端部のしゅう動を可能にする。また、剛性ガイドは、環状部材の外周の欠落部分、特に、切断端部間の周線の欠落をその外周によって補うことができ、拡張バンドが所望の形状の状態に拡径するのを可能とし、拡張バンドの半径方向外側へのほぼ均一な拡張を可能とし、可とう継手をマンホールの削孔部に高い密着性で固定させることができる。   As the diameter expanding means, a rigid guide can be used. The rigid guide accommodates both ends of the cut portion of the annular member, and enables sliding of each end portion in the rigid guide when the expansion band is expanded. In addition, the rigid guide can compensate for a missing portion on the outer periphery of the annular member, in particular, a lack of a peripheral line between the cut ends by the outer periphery, thereby enabling the expansion band to expand to a desired shape. The expansion band can be expanded almost uniformly outward in the radial direction, and the flexible joint can be fixed to the drilling portion of the manhole with high adhesion.

剛性ガイドは筒状体でよい。筒状は、上述したように、外周の壁部とその壁部に囲まれた内部空間を有する形状をいい、外周の壁部には、外面又は内面の少なくとも１方において、断面が、楕円形、矩形、多角形等のものや、これらの組合せのもの等が包含される。   The rigid guide may be a cylindrical body. As described above, the cylindrical shape means a shape having an outer peripheral wall portion and an inner space surrounded by the wall portion, and the outer peripheral wall portion has an elliptical cross section on at least one of the outer surface and the inner surface. , Rectangles, polygons, and combinations thereof.

剛性ガイドには、窓を設けることができ、かかる窓には、環状部材の切断部の両端部の隙間を拡大するための拡張治具を挿入することができる。かかる窓は、剛性ガイドの側面に設けることができ、かかる剛性ガイドは断面略Ｕ状のものでよい。断面略Ｕ字状とは、剛性ガイド自体は筒状体であり、その側面が帯状に欠落した形状である。断面略Ｕ字状には、断面が四角形の剛性ガイドの場合は、４つの側面のうち１つの側面が欠如した形態も含む。   The rigid guide can be provided with a window, and an extension jig for enlarging the gap between both ends of the cut portion of the annular member can be inserted into the window. Such a window can be provided on a side surface of the rigid guide, and the rigid guide may have a substantially U-shaped cross section. The substantially U-shaped cross section is a shape in which the rigid guide itself is a cylindrical body and its side surface is missing in a band shape. In the case of a rigid guide having a square cross section, the substantially U-shaped cross section includes a form in which one of the four side surfaces is missing.

拡径によって開いた環状部材の切断部の両端部は、特に制限されないが、適切な固定手段によって固定することができ、環状部材の拡径状態が保持される。固定手段としては、例えば、環状部材の切断部の両端部等に設けられる突起部等の固定部と、剛性ガイドに設けられる係止部とによる係合や、環状部材の切断部の両端部等に設けられる固定具用留め部とストッパー等のような固定具との組合せ等が挙げられる。   Both ends of the cut portion of the annular member opened by the diameter expansion are not particularly limited, but can be fixed by an appropriate fixing means, and the diameter expansion state of the annular member is maintained. Examples of the fixing means include engagement by a fixing portion such as a protrusion provided at both ends of the cut portion of the annular member and a locking portion provided at the rigid guide, both ends of the cut portion of the annular member, and the like. A combination of a fixing part for a fixing tool provided on a fixing tool such as a stopper and the like.

好ましくは、固定手段は、環状部材の切断部の両端部を固定具用留め部とし、各固定具用留め部の間の隙間にストッパー等のような固定具を挿入することである。この際、前述の剛性ガイドの窓を固定具挿入用に用いることができる。   Preferably, the fixing means is to use both ends of the cut portion of the annular member as fastener fasteners and insert a fixture such as a stopper into the gap between the fastener fasteners. In this case, the above-described rigid guide window can be used for inserting the fixture.

上述の環状部材の拡張突起、剛性ガイド及び固定手段は、前述したような、剛性材料、特に、硬質樹脂、硬質プラスチック、繊維補強プラスチック、腐食し難い金属類等から形成することができる。   The expansion protrusion, the rigid guide, and the fixing means of the annular member described above can be formed of a rigid material as described above, in particular, a hard resin, a hard plastic, a fiber reinforced plastic, a metal that does not easily corrode, and the like.

（６）（削孔部と可とう継手との接続）
上述の可とう継手は、上述の拡張バンド及び拡張手段によって、マンホールの壁厚や削孔径等に応じて、マンホールの削孔部の内面に接続される。 (6) (Connection between drilled part and flexible joint)
The above-mentioned flexible joint is connected to the inner surface of the drilling portion of the manhole according to the wall thickness of the manhole, the drilling diameter, and the like by the above-described extension band and extension means.

拡張バンドにおいて、環状部材は少なくとも１本からなることができ、複数本の環状部材を用いることもできる。複数本の環状部材を用いる場合、各環状部材を同時にか、又は別々に拡径することができ、各々の拡径状態を一体でか、又は別個に固定することができる。   In the expansion band, the annular member can be composed of at least one, and a plurality of annular members can also be used. When a plurality of annular members are used, the diameters of the annular members can be increased simultaneously or separately, and the respective expanded states can be fixed integrally or separately.

図面を参照して、本発明をより一層詳細に説明する。
図１は本発明の１例の拡張バンドを示す斜視図である。図２（ａ）は図１の拡張バンドをＡ方向から見た平面図である。図２（ｂ）は図１の拡張バンドをＢ−Ｂ線で切断して見た正面図である。図２（ｃ）は図１の拡張バンドを図２（ａ）のＤ−Ｄ線で切断して見た断面図である。図３は本発明の１例の接続構造の縦断面図である。図４は図３の接続構造の横断面図である。図５は図４の接続構造の拡大図である。 The present invention will be described in more detail with reference to the drawings.
FIG. 1 is a perspective view showing an example of an expansion band according to the present invention. FIG. 2A is a plan view of the extension band of FIG. 1 viewed from the A direction. FIG. 2B is a front view of the extension band of FIG. 1 cut along line BB. FIG. 2C is a cross-sectional view of the extension band of FIG. 1 taken along line DD in FIG. FIG. 3 is a longitudinal sectional view of an example connection structure of the present invention. 4 is a cross-sectional view of the connection structure of FIG. FIG. 5 is an enlarged view of the connection structure of FIG.

図６（ａ）は１例の可とう継手の正面図である。図６（ｂ）は図６（ａ）の可とう継手の断面図である。図７は拡張前の拡張バンドと拡張冶具とを示す１例の図である。図８は拡張バンドを拡張する際の状態を示す１例の図である。図９は本発明の他の例の接続構造の横断面図である。   FIG. 6A is a front view of an example flexible joint. FIG. 6B is a cross-sectional view of the flexible joint of FIG. FIG. 7 is a diagram illustrating an example of an expansion band and an expansion jig before expansion. FIG. 8 is a diagram illustrating an example of a state when the extension band is extended. FIG. 9 is a cross-sectional view of another example connection structure of the present invention.

図１及び図２に示すように、１例の拡張バンド１は、断面が略円形の棒状体２Ａにより形成される環状部材２と、環状部材２を拡径する拡径手段３とを具えてなる。環状部材２は、少なくとも１ヶ所に切断部２Ｂを有する。環状部材２は、マンホールの削孔部の内面に沿うような湾曲形状を有する。拡張バンド１は、拡径手段３によって、環状部材２の切断部２Ｂの隙間が拡大し、環状部材２が拡径される。図１及び２では、拡張バンド１は、拡径の際には、剛性ガイド３Ａ内の環状部材２の切断部２Ｂ間にストッパー３Ｂが嵌込され、拡張状態が固定され、平面Ｃに対して上側に湾曲する。   As shown in FIGS. 1 and 2, an example of the expansion band 1 includes an annular member 2 formed by a rod-shaped body 2 </ b> A having a substantially circular cross section, and a diameter expanding means 3 for expanding the diameter of the annular member 2. Become. The annular member 2 has the cutting part 2B in at least one place. The annular member 2 has a curved shape along the inner surface of the drilling portion of the manhole. In the expansion band 1, the gap between the cut portions 2 </ b> B of the annular member 2 is expanded by the diameter expanding means 3, and the annular member 2 is expanded in diameter. 1 and 2, when the diameter of the expansion band 1 is expanded, a stopper 3B is fitted between the cut portions 2B of the annular member 2 in the rigid guide 3A, the expanded state is fixed, and the expansion band 1 is fixed to the plane C. Curve upward.

拡張バンド１は、図１及び図２に示すように、環状部材２の切断部２Ｂの両端部に、拡張係止突起２Ｃを有することができ、拡張係止突起２Ｃの間が拡大することによって、環状部材２の切断部２Ｂの両端部が拡大され、環状部材２が拡径される。環状部材２の拡径状態は、環状部材２の切断部２Ｂの両端部の間のストッパー３Ｂによって保持することができる。   As shown in FIGS. 1 and 2, the expansion band 1 can have expansion locking projections 2C at both ends of the cut portion 2B of the annular member 2, and the space between the expansion locking projections 2C is enlarged. The both ends of the cutting part 2B of the annular member 2 are enlarged, and the diameter of the annular member 2 is increased. The diameter-enlarged state of the annular member 2 can be held by the stopper 3B between both end portions of the cut portion 2B of the annular member 2.

図３〜図５に示すように、１例の接続構造１１では、拡張バンド１は、円形マンホール１２の削孔部１２Ａの内面１２Ｂに、筒状可とう継手１３を固定する。また、筒状可とう継手１３は管１４と接続される。環状部材の棒状体２Ａは断面円形であり、かつ、環状部材２は、削孔部内面１２Ｂに沿った湾曲形状を有する。   As shown in FIGS. 3 to 5, in one example of the connection structure 11, the expansion band 1 fixes the cylindrical flexible joint 13 to the inner surface 12 </ b> B of the drilled portion 12 </ b> A of the circular manhole 12. The cylindrical flexible joint 13 is connected to the pipe 14. The rod-shaped body 2A of the annular member has a circular cross section, and the annular member 2 has a curved shape along the inner surface 12B of the drilling portion.

この例の筒状可とう継手１３は、図５及び図６に詳細に示すように、削孔側円筒部１３Ａと管側円筒部１３Ｂとそれらを繋ぐ連結部１３Ｃを有する。また、削孔側円筒部１３Ａは、削孔部１２Ａの内面１２Ｂに沿った湾曲形状を有する。さらに、削孔側円筒部１３Ａは、環状部材２の形状と同形状のバンド受け半円形溝部１３Ｄを有する。拡張バンド１は、図５に示すように、半円形溝部１３Ｄ内で拡張固定することができる。   As shown in detail in FIGS. 5 and 6, the tubular flexible joint 13 of this example includes a drilling side cylindrical portion 13 </ b> A, a tube side cylindrical portion 13 </ b> B, and a connecting portion 13 </ b> C that connects them. Further, the drilling side cylindrical portion 13A has a curved shape along the inner surface 12B of the drilling portion 12A. Further, the drilling side cylindrical portion 13A has a band receiving semicircular groove portion 13D having the same shape as that of the annular member 2. As shown in FIG. 5, the expansion band 1 can be expanded and fixed in the semicircular groove portion 13D.

図１、図２、図４及び図５に示すように、この例の拡張バンド１には、環状部材２の切断部２Ｂの両端部に、断面略Ｕ字状の剛性ガイド３Ａを設ける。剛性ガイド３Ａ内で、少なくとも１本の環状部材２の切断部２Ｂの両端部が拡張され、拡張した切断部２Ｂの間にストッパー３Ｂが挿入され、拡張状態が固定される。   As shown in FIGS. 1, 2, 4, and 5, the expansion band 1 of this example is provided with a rigid guide 3 </ b> A having a substantially U-shaped cross section at both ends of the cut portion 2 </ b> B of the annular member 2. Within the rigid guide 3A, both ends of the cut portion 2B of at least one annular member 2 are expanded, and the stopper 3B is inserted between the expanded cut portions 2B, and the expanded state is fixed.

図３は、本発明の１実施例で、マンホール１２の削孔部１２Ａに、本発明の１例の拡張バンド１を用いて、筒状可とう継手１３を介して、取り付け管１４を接続した状態の縦断面図である。図４は、図３の横断面図を示すもので、筒状可とう継手１３が、断面が円形で、削孔部１２Ａの内面１２Ｂに沿った湾曲形状を有する拡張バンド１で拡張固定されている。   FIG. 3 shows an embodiment of the present invention, in which a mounting pipe 14 is connected to a drilled portion 12A of a manhole 12 through a cylindrical flexible joint 13 using the expansion band 1 of an example of the present invention. It is a longitudinal cross-sectional view of a state. FIG. 4 shows a cross-sectional view of FIG. 3, in which a cylindrical flexible joint 13 is expanded and fixed by an expansion band 1 having a circular cross section and a curved shape along the inner surface 12B of the drilling portion 12A. Yes.

図５は、図４の横断面図の取付け部を拡大したもので、筒状可とう継手１３は、削孔側円筒部１３Ａと管側円筒部１３Ｂとこれらを繋ぐ連結部１３Ｃとを有しており、拡張バンド１は、断面が円形の棒状体２Ａの環状部材２からなり、マンホール１２の削孔部の内面１２Ｂに沿った湾曲形状を有し、筒状可とう継手１３の削孔側円筒部１３Ａは、拡張バンド１の拡張により、削孔部の内面１２Ｂに圧着され、拡張バンド１の切断部２Ｂ間にストッパー３Ｂが嵌込され、固定されている。管１４は、筒状可とう継手１３の管側円筒部１３Ｂ内に挿入され、締結バンド１５で締め付け固定されている。連結部１３Ｃには、伸縮部１３Ｅを設け、削孔側円筒部１３Ａには、鍔部１３Ｆを設け、管側円筒部１３Ｂには、締結バンド用鍔部を設けることができる。   FIG. 5 is an enlarged view of the mounting portion of the cross-sectional view of FIG. 4, and the cylindrical flexible joint 13 has a drilling side cylindrical portion 13A, a tube side cylindrical portion 13B, and a connecting portion 13C connecting them. The expansion band 1 is composed of an annular member 2 of a rod-shaped body 2A having a circular cross section, has a curved shape along the inner surface 12B of the drilling portion of the manhole 12, and is formed on the drilling side of the cylindrical flexible joint 13 The cylindrical portion 13 </ b> A is crimped to the inner surface 12 </ b> B of the drilling portion due to the expansion of the expansion band 1, and a stopper 3 </ b> B is fitted and fixed between the cut portions 2 </ b> B of the expansion band 1. The tube 14 is inserted into the tube side cylindrical portion 13 </ b> B of the cylindrical flexible joint 13 and is fastened and fixed by a fastening band 15. The connecting portion 13C can be provided with an expansion / contraction portion 13E, the drilling side cylindrical portion 13A can be provided with a flange portion 13F, and the tube side cylindrical portion 13B can be provided with a fastening band flange portion.

図６は、筒状可とう継手１３の本体を示すもので、削孔側円筒部１３Ａには、拡張バンド１の環状部材２と同形状のバンド受け半円形溝部１３Ｄを有する。本発明の湾曲拡張バンドは、筒状可とう継手１３との接触点が拡張に伴い動くため、断面円形形状の棒状体から形成される環状部材からなる拡張バンドは、接触点が変化しても、拡張力が接触点に集中できるため、筒状可とう継手１３を均一に圧着し、安定した止水状態を得ることができる。また、筒状可とう継手１３の拡張バンドで圧着する削孔側円筒部１３Ａは、拡張バンドの接触点が拡張により変化しても、拡張バンドの断面形状と同形状のバンド受け半円形溝部１３Ｄが形成されておれば、拡張力を面で受けることができ、安定した拡張状態を維持できる。   FIG. 6 shows the main body of the cylindrical flexible joint 13, and the drilling side cylindrical portion 13 </ b> A has a band receiving semicircular groove portion 13 </ b> D having the same shape as the annular member 2 of the expansion band 1. In the curved expansion band of the present invention, the contact point with the cylindrical flexible joint 13 moves with expansion. Therefore, the expansion band formed of an annular member formed of a rod-shaped body having a circular cross section has a contact point that changes. Since the expansion force can be concentrated on the contact point, the cylindrical flexible joint 13 can be uniformly crimped to obtain a stable water stop state. Further, the drilling side cylindrical portion 13A to be crimped by the expansion band of the cylindrical flexible joint 13 is a band receiving semicircular groove portion 13D having the same shape as the cross section of the expansion band even if the contact point of the expansion band changes due to expansion. If formed, the expansion force can be received on the surface, and a stable expanded state can be maintained.

図７は、拡張前の拡張バンド１とそれに適切な拡張冶具１６とを示す。拡張バンド１は、環状部材２の切断部２Ｂを中央部にし、その近傍部に、拡張係止突起２Ｃを有しており、断面Ｕ字状の剛性ガイド３Ａが、それらをしゅう動可能な状態で収容している。拡張冶具１６は、拡張係止突起２Ｃを係止する拡張ツメ１６Ａと拡張ツメ１６Ａを駆動させるためのジャッキ１６Ｂとを具える。   FIG. 7 shows the expansion band 1 before expansion and the expansion jig 16 suitable for it. The expansion band 1 has the cutting portion 2B of the annular member 2 as a central portion, and has an expansion locking projection 2C in the vicinity thereof, and the rigid guide 3A having a U-shaped cross section can slide them. Is housed in. The expansion jig 16 includes an expansion claw 16A for locking the expansion locking projection 2C and a jack 16B for driving the expansion claw 16A.

図８は、筒状可とう継手１３をマンホール１２の削孔部の内面１２Ｂに据え付け、図７に示すような拡張冶具１６で、拡張バンド１を拡張する前の状態を示す。筒状可とう継手１３の管側円筒部１３Ｃは、拡張冶具１６での拡張バンド１の取付作業ができ易いように、マンホール１２の内側に反転される。   FIG. 8 shows a state before the tubular flexible joint 13 is installed on the inner surface 12B of the drilling portion of the manhole 12 and the expansion band 1 is expanded with the expansion jig 16 as shown in FIG. The tube side cylindrical portion 13C of the tubular flexible joint 13 is inverted inside the manhole 12 so that the expansion band 1 can be easily attached with the expansion jig 16.

図９は、他の例の接続構造２１を示すもので、筒状可とう継手２３の削孔側円筒部２３Ａが、２本の環状部材２４，２５を具える拡張バンド２７によって、マンホール１２の削孔部の内面１２Ｂに拡張固定されている状態を示す。環状部材を２本にすることで、より一層優れた止水性能を発揮することができる。拡径手段２６としては、双方の環状部材２４，２５を収容する剛性ガイド２６Ａと、双方の環状部材２４，２５を同時に拡張状態に保持するストッパー２６Ｂとを用いることができる。削孔側円筒部２３Ａには、各環状部材２４，２５を位置決めするための溝部２３Ｄを有することができる。   FIG. 9 shows another example of the connection structure 21, in which the drilling side cylindrical portion 23 </ b> A of the cylindrical flexible joint 23 is formed by the expansion band 27 including two annular members 24, 25. The state which is expanded and fixed to the inner surface 12B of the drilling portion is shown. By using two annular members, it is possible to exhibit even better water stopping performance. As the diameter expanding means 26, a rigid guide 26A that accommodates both the annular members 24, 25 and a stopper 26B that simultaneously holds both the annular members 24, 25 in an expanded state can be used. The drilling side cylindrical portion 23 </ b> A can have a groove portion 23 </ b> D for positioning the annular members 24 and 25.

以上の説明から明らかなように、マンホールの削孔部に管を接続する際に、マンホールの壁厚が小さい場合や削孔径がマンホール径に比して大きい場合等には、通常の平面拡張バンドは適用できないが、本発明のように、断面形状が円形の棒状体で形成され、削孔面に沿った湾曲形状を有する環状部材を具える拡張バンドを使用すれば、安定した止水状態が得られる。また、筒状可とう継手の削孔側円筒部に、拡張バンドの断面と同形状のバンド受け円形溝部を形成すれば拡張状態が安定し優れた止水状態を維持することができる。   As is clear from the above explanation, when connecting a pipe to the drilling part of the manhole, when the wall thickness of the manhole is small or the drilling diameter is larger than the manhole diameter, etc. However, as in the present invention, a stable water-stopping state can be obtained by using an extension band that is formed of a rod-like body having a circular cross-sectional shape and has an annular member having a curved shape along the drilling surface. can get. Further, if a band receiving circular groove having the same shape as the cross section of the expansion band is formed in the cylindrical portion of the cylindrical flexible joint, the expanded state is stable and an excellent water stop state can be maintained.

本発明の拡張バンドは、マンホールの壁厚が小さい場合やマンホール径に比して削孔径が大きい場合等、通常の拡張バンドが適用できない場合等の他、通常の拡張バンドが適用できる場合にも用いることができる。   The expansion band of the present invention is applicable to cases where a normal expansion band can be applied, in addition to cases where a normal expansion band is not applicable, such as when the wall thickness of a manhole is small or the drilling diameter is larger than the manhole diameter. Can be used.

本発明の１例の拡張バンドを示す斜視図である。It is a perspective view which shows the example of an expansion band of this invention. （ａ）は図１の拡張バンドをＡ方向から見た平面図であり、（ｂ）は図１の拡張バンドをＢ−Ｂ線で切断して見た正面図であり、（ｃ）は図１の拡張バンドを（ａ）のＤ−Ｄ線で切断して見た断面図である。(A) is the top view which looked at the expansion band of FIG. 1 from A direction, (b) is the front view which cut | disconnected the expansion band of FIG. 1 by the BB line, (c) is a figure. It is sectional drawing which cut | disconnected the 1 expansion band by the DD line of (a). 本発明の１例の接続構造の縦断面図である。It is a longitudinal cross-sectional view of the connection structure of one example of this invention. 図３の接続構造の横断面図である。It is a cross-sectional view of the connection structure of FIG. 図４の接続構造の拡大図である。It is an enlarged view of the connection structure of FIG. （ａ）は１例の可とう継手の正面図である。（ｂ）は（ａ）の可とう継手の断面図である。(A) is a front view of an example flexible joint. (B) is sectional drawing of the flexible joint of (a). 拡張前の拡張バンドと拡張冶具とを示す１例の図である。It is a figure of an example which shows the expansion band and expansion jig before expansion. 拡張バンドを拡張する際の状態を示す１例の図である。It is a figure of an example which shows the state at the time of extending an expansion band. 本発明の他の例の接続構造の横断面図である。It is a cross-sectional view of the connection structure of another example of the present invention. 従来の１例のマンホールの構造の断面図である。It is sectional drawing of the structure of one example of the conventional manhole. 従来の１例の拡張バンドの断面図である。It is sectional drawing of the expansion band of one conventional example. 従来の他の例のマンホール構造の断面図である。It is sectional drawing of the manhole structure of the other conventional example.

符号の説明Explanation of symbols

１，２７ 拡張バンド
２，２４，２５ 環状部材
２Ａ 棒状体
２Ｂ 切断部
２Ｃ 拡張係止突起
３，２６ 拡径手段
３Ａ，２６Ａ 剛性ガイド
３Ｂ，２６Ｂ ストッパー
１１，２１ 接続構造
１２ 円形マンホール
１２Ａ 削孔部
１２Ｂ 削孔部の内面
１３，２３ 筒状可とう継手
１３Ａ，２３Ａ 削孔側円筒部
１３Ｂ 管側円筒部
１３Ｃ 連結部
１３Ｄ，２３Ｄ 半円形溝部
１３Ｅ 伸縮部
１３Ｆ 鍔部
１４ 管
１５ 締結バンド
１６ 拡張冶具
１６Ａ 拡張ツメ
１６Ｂ ジャッキ DESCRIPTION OF SYMBOLS 1,27 Expansion band 2,24,25 Annular member 2A Bar-shaped body 2B Cutting part 2C Expansion latching protrusion 3,26 Diameter expansion means 3A, 26A Rigid guide 3B, 26B Stopper 11,21 Connection structure 12 Circular manhole 12A Drilling part 12B Inner surface of drilling part 13,23 Cylindrical flexible joint 13A, 23A Drilling hole side cylindrical part 13B Pipe side cylindrical part 13C Connection part 13D, 23D Semicircular groove part 13E Stretching part 13F Girder part 14 Pipe 15 Fastening band 16 Expansion jig 16A expansion claw 16B jack

Claims (3)

マンホールの削孔部と筒状可とう継手との接続に用いる拡張バンドにおいて、
断面が略円形の棒状体により形成される環状部材と、前記環状部材を拡径する拡径手段とを具えてなり、前記環状部材が、少なくとも１ヶ所に切断部を有し、前記削孔部の内面に沿うような湾曲形状を有し、前記拡径手段によって、前記環状部材の前記切断部の隙間が拡大し、前記環状部材が拡径される拡張バンドであり、前記拡径手段が剛性ガイド及びストッパーを備え、前記剛性ガイドが断面略Ｕ字状であり、少なくとも１本の前記環状部材が拡径される際、前記ストッパーが、前記剛性ガイド内の前記環状部材の切断部の両端部の間に挿入され、前記環状部材の拡径状態が保持される、拡張バンド。 In the expansion band used to connect the drilling part of the manhole and the cylindrical flexible joint,
An annular member formed by a rod-like body having a substantially circular cross section; and a diameter expanding means for expanding the annular member, wherein the annular member has a cutting portion in at least one place, An expansion band in which a gap between the cut portions of the annular member is expanded by the diameter expanding means, and the annular member is expanded , and the diameter expanding means is rigid. A guide and a stopper, wherein the rigid guide has a substantially U-shaped cross section, and when the diameter of at least one of the annular members is expanded, the stoppers are both ends of the cut portion of the annular member in the rigid guide. An expansion band that is inserted between the two and holds the expanded state of the annular member . マンホールの削孔部と筒状可とう継手とが拡張バンドによって接続されている接続構造において、
拡張バンドが、断面が略円形の棒状体により形成される環状部材と、前記環状部材を拡径する拡径手段とを具えてなり、前記環状部材が、少なくとも１ヶ所に切断部を有し、前記削孔部の内面に沿うような湾曲形状を有し、前記拡径手段によって、前記環状部材の前記切断部の隙間が拡大され、前記環状部材が拡径され、筒状可とう継手が前記削孔部の内面に固定されている、接続構造。 In the connection structure in which the drilling part of the manhole and the cylindrical flexible joint are connected by an expansion band,
The expansion band comprises an annular member formed by a rod-like body having a substantially circular cross section, and a diameter expanding means for expanding the annular member, and the annular member has a cutting portion at at least one place, It has a curved shape along the inner surface of the hole-drilling part, and the gap between the cut parts of the annular member is enlarged by the diameter-expanding means, the diameter of the annular member is increased, and the cylindrical flexible joint is Connection structure that is fixed to the inner surface of the hole . 前記筒状可とう継手が削孔側筒状部を備えており、前記削孔側筒状部の内面に溝部が設けられており、前記溝部が、前記削孔部の内面に沿うような湾曲形状を有しており、前記拡張バンドが前記溝部内で固定されている、請求項２記載の接続構造。 The tubular flexible joint includes a drilled side cylindrical portion, a groove is provided on the inner surface of the drilled side cylindrical portion, and the groove is curved so as to be along the inner surface of the drilled portion. The connection structure according to claim 2, wherein the connection structure has a shape and the extension band is fixed in the groove .
JP2004343955A 2004-11-29 2004-11-29 Expansion band and connection structure of flexible joint for manhole Active JP4493483B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004343955A JP4493483B2 (en) 2004-11-29 2004-11-29 Expansion band and connection structure of flexible joint for manhole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004343955A JP4493483B2 (en) 2004-11-29 2004-11-29 Expansion band and connection structure of flexible joint for manhole

Publications (2)

Publication Number Publication Date
JP2006152653A JP2006152653A (en) 2006-06-15
JP4493483B2 true JP4493483B2 (en) 2010-06-30

Family

ID=36631259

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004343955A Active JP4493483B2 (en) 2004-11-29 2004-11-29 Expansion band and connection structure of flexible joint for manhole

Country Status (1)

Country Link
JP (1) JP4493483B2 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0356869U (en) * 1989-10-04 1991-05-31
JPH0820996A (en) * 1994-07-06 1996-01-23 Kowa Kasei Kk Joint and contact bonding jig used for connecting manhole to pipeline or the like
JPH09329277A (en) * 1996-06-11 1997-12-22 Hayakawa Rubber Co Ltd Water cutoff flexible coupling and mounting method therefor
JPH11217840A (en) * 1997-11-27 1999-08-10 Crk Kk Manhole joint
JPH11303112A (en) * 1998-04-20 1999-11-02 Hayakawa Rubber Co Ltd Joint structure, expansion band, execution method for compression/expansion band and joint structure
JP2003278174A (en) * 2002-03-25 2003-10-02 Hayakawa Rubber Co Ltd Fixing method of flexible joint, expansion band and connecting structure of manhole

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0356869U (en) * 1989-10-04 1991-05-31
JPH0820996A (en) * 1994-07-06 1996-01-23 Kowa Kasei Kk Joint and contact bonding jig used for connecting manhole to pipeline or the like
JPH09329277A (en) * 1996-06-11 1997-12-22 Hayakawa Rubber Co Ltd Water cutoff flexible coupling and mounting method therefor
JPH11217840A (en) * 1997-11-27 1999-08-10 Crk Kk Manhole joint
JPH11303112A (en) * 1998-04-20 1999-11-02 Hayakawa Rubber Co Ltd Joint structure, expansion band, execution method for compression/expansion band and joint structure
JP2003278174A (en) * 2002-03-25 2003-10-02 Hayakawa Rubber Co Ltd Fixing method of flexible joint, expansion band and connecting structure of manhole

Also Published As

Publication number Publication date
JP2006152653A (en) 2006-06-15

Similar Documents

Publication Publication Date Title
JP2008533405A (en) Non-excavation repair member and repair method for pipeline
US11079058B2 (en) Stent with coiled spring
JP2004092699A (en) Flexible pipe joint
JP4493483B2 (en) Expansion band and connection structure of flexible joint for manhole
JP2005337403A (en) Pipe fitting
JP3836848B2 (en) Construction method of underground anchor
JP2009047302A (en) Connection structure of metal-resin composite pipes and metal-resin composite pipe for use in the connection structure
JP4070488B2 (en) Expansion band and manhole connection structure
JP3706434B2 (en) Manhole joint structure
JP3769367B2 (en) Lining method for existing pipes
JP4047139B2 (en) Water stop joint for manhole, pipe joint, manhole structure and construction method of manhole structure
JP2012206471A (en) Profile
KR20210155131A (en) A connecting device for corrugated pipe
JP4773745B2 (en) Seismic joint device for manhole
JP7372631B2 (en) lining material
JP4414085B2 (en) Manhole fitting
JP4705410B2 (en) Expansion band and connection structure of flexible joint for manhole
JP4063558B2 (en) Pipe mounting method, flexible joint and pipe mounting structure
JP2005229711A (en) Grommet
JP2022116752A (en) Pipe joint structure
JP3180434U (en) High water tight fitting
KR20050022793A (en) Reinforced double layer underground duct
JP4663478B2 (en) Manhole joint device and ribbed tube connection structure
JP2005320684A (en) Resin-made manhole
JPH11140896A (en) Packing

Legal Events

Date Code Title Description
RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20060607

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20071002

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20071002

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20091203

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20091215

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100215

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100316

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100406

R150 Certificate of patent or registration of utility model

Ref document number: 4493483

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130416

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20160416

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250