JP4037558B2 - Strip-shaped member for spiral tube formation - Google Patents

Strip-shaped member for spiral tube formation Download PDF

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Publication number
JP4037558B2
JP4037558B2 JP12233899A JP12233899A JP4037558B2 JP 4037558 B2 JP4037558 B2 JP 4037558B2 JP 12233899 A JP12233899 A JP 12233899A JP 12233899 A JP12233899 A JP 12233899A JP 4037558 B2 JP4037558 B2 JP 4037558B2
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JP
Japan
Prior art keywords
strip
spiral tube
tube
substrate
belt
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 - Fee Related
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JP12233899A
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Japanese (ja)
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JP2000313064A (en
Inventor
充彦 渡辺
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Sekisui Chemical Co Ltd
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Sekisui Chemical Co Ltd
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Priority to JP12233899A priority Critical patent/JP4037558B2/en
Publication of JP2000313064A publication Critical patent/JP2000313064A/en
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  • Rigid Pipes And Flexible Pipes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、上下水道管及びガス管等の老朽化した湾曲部を含む既設管更生用の螺旋管形成用帯状部材に関するものである。
【0002】
【従来の技術】
上下水道及びガス管等として使用される既設管には、古くから金属管やヒューム管が使用されている。このような既設管は、長期の使用によって老朽化し、割れや腐食により漏水するおそれがある。このため、最近では、老朽化した埋設管等の既設管内に合成樹脂管を挿入してライニングすることが行われている。
【0003】
例えば、特公平3−48392号公報に記載されているように、既設管のライニング工法の一つに合成樹脂製の帯状体を螺旋状に巻回することにより形成される螺旋管によって既設管をライニングする方法が知られている。この方法では、既設管ライニング用の帯状体を螺旋状に巻回して、相接する側縁部同士を係合状態とすることにより螺旋管を製管し、その螺旋管により既設管内面をライニングするようになっている。
【0004】
上記既設管ライニング用帯状体では、例えば湾曲した既設管に沿って螺旋管を挿通させる場合には、既設管内周面が螺旋管と接触することにより、螺旋管に大きな抵抗力が作用する。このために、螺旋管に順次帯状体が送給されることにより、螺旋管を構成する帯状体に螺旋方向への推進力が作用して、螺旋管には拡径するように力が加わる。これにより、螺旋管を構成している帯状体の幅方向に大きな引張力が作用し、その引張力により帯状体の各側縁部同士の係合状態が解除されて、螺旋管が破損するおそれがある。
【0005】
そこで、上記の問題を解決するため、特開平8−75042号公報に記載されているように、帯状体同士をジョイナーで接続し、ジョイナーに伸縮機能を持たせる手段が提案されている。
【0006】
即ち、図6に示すように、帯板状a,a間に軟質塩化ビニル樹脂製のジョイナーbを設け、ジョイナーbの突条c,cを帯板状aの凹溝d,dに挿入することにより帯板状a,a同士を結合して螺旋管を構成し、ジョイナーbの屈曲変形部eの変形により既設管の湾曲に対応できるようにしたものである。
【0007】
しかしながら、上記の螺旋管は、既設管の湾曲の曲率がたいして大きくない場合には有効であるが、既設管の湾曲の曲率が大きくなると、帯板状の幅を小さくする必要があり、幅の小さな帯板状を使用する結果、施工効率の低下が免れない欠点があった。又、この幅の小さい帯状体を直管部の更生用に使用することは、施工効率上到底できるものではなかった。
【0008】
【発明が解決しようとする課題】
本発明は、上記のような従来の問題点を解消し、湾曲部を有する既設管の直管部の更生用にも使用でき、且つ、湾曲部の湾曲の曲率が大きくなっても、帯板部材の幅を小さくする必要がなく、施工効率の低下のおそれのない湾曲部の更生に使用できる螺旋管形成用帯状部材を提供することを目的としてなされたものである。
【0009】
【課題を解決するための手段】
本発明は、帯状基板の両側縁部の片面に接合部が立設され、該帯状基板の他の片面が内側となるように螺旋状に巻回し相接する接合部同士を接合することにより螺旋管を形成することができる螺旋管形成用帯状部材であって、前記帯状基板の片面に長手方向に沿って細幅凹溝が設けられ、該帯状基板の他の片面の前記細幅凹溝の両側の部分に、長手方向に沿って2本の細幅凹溝が設けられており、それらの細幅凹溝部分で長手方向に沿って折り曲げ自在とされている螺旋管形成用帯状部材である。
【0010】
【作用】
本発明の螺旋管形成用帯状部材は、前記帯状基板の片面に長手方向に沿って細幅凹溝が設けられ、該帯状基板の他の片面の前記細幅凹溝の両側の部分に、長手方向に沿って2本の細幅凹溝が設けられており、それらの細幅凹溝部分で長手方向に沿って折り曲げ自在とされていることにより、帯状基板の細幅凹溝部分で折り曲げないストレート状態にて巻回して相接する接合部同士を接合することにより、既設管の直管部更生用のストレート状態の螺旋管を形成することができるとともに、帯状基板の細幅凹溝部分で折り曲げた状態にて巻回し相接する接合部同士を接合することにより、既設管の湾曲部更生用の伸縮部を有する螺旋管を形成することができる。そして、湾曲部においては、帯状部材に引張力が作用しても、その折り曲げた伸縮部が幅方向に広がった状態となり、引張力が吸収される。その結果、既設管の湾曲部の曲率が大きい場合にも伸縮部の変形により対応できる。又、既設管の直管部も湾曲部も同じ材料を用いて形成した螺旋管により更生することができるので、異なる帯状部材を用いる場合に比べて切断したり接続したりする作業を行う必要がないので、作業性がきわめてよい。
【0011】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照して説明する。
図1は、本発明の螺旋管形成用帯状部材の実施の形態の一例を示す断面図である。
図1に示すように、螺旋管形成用帯状部材1は、帯状基板11の一側縁部の片面に一方の係合部である突条12が立設されている。突条12は支柱部121とその先端に設けられた断面円形の挿入部122とからなる。
【0012】
帯状基板11の他の側縁部の他の片面にその端縁から適宜距離を隔てて長手方向に沿う段部13が設けられ、段部13には、片面側に突出する他の接合部である凹溝部14が立設されている。凹溝部14は他の片面側に開口する奥広がりの被挿入部141とフランジ部142とからなる。
帯状基板11の片面の突条12と凹溝部14との間には2本の断面T形のリブ15,15が立設されている。
【0013】
帯状基板11の片面の2本のリブ15,15間には、長手方向に沿って細幅凹溝16が設けられており、図2にも示すように、その細幅凹溝16に沿って折り曲げ自在とされている。
帯状基板11の他の片面には、片面に設けられた細幅凹溝16の両側の部分に、長手方向に沿って2本の細幅凹溝17,17が設けられており、図2にも示すように、その細幅凹溝17,17に沿って折り曲げ自在とされている。
18は帯状基板11の片面に設けられたシール材である。
【0014】
そして、図3及び図4にも示すように、帯状基板11の他の片面が内側となるように巻回したとき、相接する凹溝部14の被挿入部141内に突条12の挿入部122を挿入するようにして螺旋管を形成することができるようになっている。
尚、図3は螺旋管の直管部を形成する場合の接合状態を示すものであり、図4は螺旋管の湾曲部を形成する場合の接合状態を示すものである。
【0015】
以下、図1に示す螺旋管形成用帯状部材1を用いて湾曲部を含む既設管を更生する例を図3〜図5を参照して説明する。
図5(a)〜(c)において、Pは図1に示す螺旋管形成用帯状部材1により更生される既設管であり、P1は直管部、P2は湾曲部、P3は直管部である。Rは既設管P内に、その内部を更生するのに設けられる螺旋管であり、図1に示す螺旋管形成用帯状部材1にて形成される。
【0016】
図5(a)に示すように、R1は既設管Pの直管部P1内に設けられる螺旋管であり、図1に示す螺旋管形成用帯状部材1をそのまま螺旋状に巻回し、図3に示すように、相接する凹溝部14の被挿入部142内に突条12の挿入部122を挿入するように接合することにより形成する。このとき、帯状基板11は、細幅凹溝16,17,17に沿って折り曲げることなく、ストレート状態のまま使用され、形成される螺旋管R1もストレート状態のものである。
【0017】
図5(b)に示すように、R2は既設管Pの直管部P2内に設けられる螺旋管であり、図2に示すように、図1に示す螺旋管形成用帯状部材1を帯状基板11の細幅凹溝16,17,17に沿って折り曲げた状態の螺旋管形成用帯状部材1′にしておいて、これを螺旋状に巻回し、相接する凹溝部14の被挿入部142内に突条12の挿入部122を挿入するように接合することにより形成する。このとき、形成される螺旋管R2は、帯状基板11の細幅凹溝16,17,17に沿って折り曲げられた伸縮部を有するものである。
【0018】
これにより、帯状部材に引張力が作用しても、その伸縮部が幅方向に広がった状態となり、引張力が吸収される。その結果、既設管の湾曲部の曲率が大きい場合にも伸縮部の変形により対応できる。
【0019】
図5(c)に示すように、R3は既設管Pの直管部P3内に設けられる螺旋管であり、図1に示す螺旋管形成用帯状部材1をそのまま螺旋状に巻回し、図3に示すように、相接する凹溝部14の被挿入部142内に突条12の挿入部122を挿入するように接合することにより形成する。このとき、帯状基板11は、細幅凹溝16,17,17に沿って折り曲げることなく、ストレート状態のまま使用され、形成される螺旋管R1もストレート状態のものである。
【0020】
【発明の効果】
本発明の螺旋管形成用帯状部材は、上記のとおりとされているので、既設管の湾曲部内においては、細幅凹溝に沿って折り曲げた状態の伸縮部を有する螺旋管を形成することができるので、帯状部材に引張力が作用しても、曲率が大きい場合にも伸縮部の変形により対応でき、又、既設管の直管部も湾曲部も同じ材料を用いて形成した螺旋管により更生することができるので、作業性がきわめてよい。
【図面の簡単な説明】
【図1】本発明の螺旋管形成用帯状部材の一例を示す断面図である。
【図2】図1に示す螺旋管形成用帯状部材の変形状態を示す断面図である。
【図3】図1に示す螺旋管形成用帯状部材を巻回して形成した螺旋管の接合部同士の接続状態を示す断面図である。
【図4】図2に示す状態の螺旋管形成用帯状部材を巻回して形成した螺旋管の接合部同士の接続状態を示す断面図である。
【図5】図1に示す螺旋管形成用帯状部材を用いて形成した螺旋管により、湾曲部を有する既設管内を更生する状態を説明する断面図である。
【図6】従来の帯状体を用いて形成した螺旋管を示す断面図である。
【符号の説明】
1,1′ 螺旋管形成用帯状部材
11 帯状基板
12 突条
14 凹溝部
15 リブ
16,17 細幅凹溝
121 挿入部
141 被挿入部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a strip-shaped member for forming a helical pipe for rehabilitating an existing pipe including an aging curved portion such as a water and sewage pipe and a gas pipe.
[0002]
[Prior art]
Metal pipes and fume pipes have long been used for existing pipes used as water and sewage systems and gas pipes. Such existing pipes may become obsolete due to long-term use and may leak due to cracks or corrosion. For this reason, recently, synthetic resin pipes have been inserted into existing pipes such as aged buried pipes for lining.
[0003]
For example, as described in Japanese Patent Publication No. 3-48392, an existing pipe is formed by a spiral pipe formed by spirally winding a strip made of a synthetic resin around one of the existing pipe lining methods. A method of lining is known. In this method, an existing pipe lining strip is wound in a spiral shape and the adjacent side edges are brought into an engaged state to form a helical pipe, and the inner surface of the existing pipe is lined by the helical pipe. It is supposed to be.
[0004]
In the existing pipe lining strip, for example, when a spiral pipe is inserted along a curved existing pipe, the inner peripheral surface of the existing pipe comes into contact with the spiral pipe, so that a large resistance acts on the spiral pipe. For this reason, by sequentially feeding the strips to the spiral tube, a propulsive force in the spiral direction acts on the strips constituting the spiral tube, and a force is applied to the spiral tube to expand the diameter. As a result, a large tensile force acts in the width direction of the band-shaped body constituting the helical tube, and the engagement state between the side edges of the band-shaped body is released by the tensile force, and the helical tube may be damaged. There is.
[0005]
In order to solve the above problem, as described in Japanese Patent Application Laid-Open No. 8-75042, means for connecting the strips with a joiner and giving the joiner an expansion / contraction function has been proposed.
[0006]
That is, as shown in FIG. 6, a joiner b made of soft vinyl chloride resin is provided between the strips a and a, and the protrusions c and c of the joiner b are inserted into the grooves d and d of the strip a. Thus, the strips a and a are joined to form a spiral tube, and the bending of the bending deformation portion e of the joiner b can be adapted to cope with the bending of the existing tube.
[0007]
However, the above-described spiral tube is effective when the curvature of the existing tube is not so large, but when the curvature of the existing tube is increased, the width of the strip plate needs to be reduced. As a result of using a small strip shape, there was a drawback that the reduction in construction efficiency was inevitable. In addition, the use of this narrow strip for rehabilitating the straight pipe portion has not been able to be achieved in terms of construction efficiency.
[0008]
[Problems to be solved by the invention]
The present invention eliminates the above-mentioned conventional problems, can be used for rehabilitation of a straight pipe portion of an existing pipe having a bending portion, and even if the bending curvature of the bending portion increases, the band plate The object of the present invention is to provide a strip-shaped member for forming a helical tube that can be used for rehabilitation of a curved portion that does not require a reduction in the width of the member and does not cause a decrease in construction efficiency.
[0009]
[Means for Solving the Problems]
In the present invention, a joining portion is erected on one side of both side edge portions of the belt-like substrate, and spirally wound by joining spirally so that the other surface of the belt-like substrate is on the inside and joining them together. A strip-shaped member for forming a spiral tube capable of forming a tube, wherein a narrow groove is provided along a longitudinal direction on one side of the strip-shaped substrate, and the narrow groove on the other surface of the strip-shaped substrate is provided. A strip-shaped member for forming a helical tube in which two narrow grooves are provided along the longitudinal direction on both sides, and the narrow grooves can be bent along the longitudinal direction. .
[0010]
[Action]
In the strip-shaped member for forming a spiral tube of the present invention, a narrow groove is provided along the longitudinal direction on one surface of the strip substrate, and a longitudinal groove is formed on both sides of the narrow groove on the other surface of the strip substrate. Two narrow grooves are provided along the direction, and these narrow grooves can be bent along the longitudinal direction so that they cannot be folded at the narrow grooves of the belt-like substrate. A straight spiral tube for straight pipe rehabilitation of existing pipes can be formed by joining the joints that are wound in a straight state and in contact with each other, and at the narrow groove portion of the belt-like substrate A spiral tube having an expansion / contraction portion for renovating a curved portion of an existing tube can be formed by joining the joint portions that are wound and in contact with each other in a bent state. In the bending portion, even if a tensile force acts on the belt-like member, the bent stretchable portion is expanded in the width direction, and the tensile force is absorbed. As a result, even when the curvature of the curved portion of the existing pipe is large, it can be dealt with by the deformation of the telescopic portion. In addition, since the straight pipe portion and the curved portion of the existing pipe can be rehabilitated by a spiral pipe formed using the same material, it is necessary to perform an operation of cutting or connecting as compared with the case of using different strip-like members. Because there is no, workability is very good.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an example of an embodiment of a strip-shaped member for forming a helical tube of the present invention.
As shown in FIG. 1, the spiral tube forming strip-shaped member 1 is provided with a ridge 12, which is one engaging portion, standing on one side of one side edge of the strip-shaped substrate 11. The ridge 12 includes a support column 121 and an insertion portion 122 having a circular cross section provided at the tip thereof.
[0012]
A step portion 13 is provided on the other side surface of the other side edge portion of the belt-like substrate 11 along the longitudinal direction at an appropriate distance from the end edge, and the step portion 13 is provided with another joint portion protruding to the one surface side. A certain groove 14 is erected. The recessed groove portion 14 is composed of an inserted portion 141 and a flange portion 142 which are open to the other side and open to the back.
Two ribs 15, 15 having a T-shaped cross section are erected between the protrusion 12 on one side of the belt-like substrate 11 and the groove 14.
[0013]
A narrow groove 16 is provided along the longitudinal direction between the two ribs 15 on one side of the belt-like substrate 11, and along the narrow groove 16 as shown in FIG. It can be bent.
On the other side of the belt-like substrate 11, two narrow grooves 17 and 17 are provided along the longitudinal direction on both sides of the narrow groove 16 provided on one side. As also shown, it can be bent along the narrow concave grooves 17 and 17.
Reference numeral 18 denotes a sealing material provided on one side of the belt-like substrate 11.
[0014]
As shown in FIGS. 3 and 4, when the other side of the belt-like substrate 11 is wound, the insertion portion of the protrusion 12 is inserted into the insertion portion 141 of the concave groove portion 14 that is adjacent to the belt-like substrate 11. A spiral tube can be formed by inserting 122.
FIG. 3 shows a joining state in the case of forming the straight pipe portion of the spiral tube, and FIG. 4 shows a joining state in the case of forming the curved portion of the spiral tube.
[0015]
Hereinafter, an example of rehabilitating an existing pipe including a curved portion using the spiral pipe forming strip-like member 1 shown in FIG. 1 will be described with reference to FIGS.
5A to 5C, P is an existing pipe rehabilitated by the strip-shaped member 1 for forming a helical tube shown in FIG. 1, P1 is a straight pipe portion, P2 is a curved portion, and P3 is a straight pipe portion. is there. R is a helical tube provided in the existing pipe P for rehabilitating the inside thereof, and is formed by a helical tube forming strip member 1 shown in FIG.
[0016]
As shown in FIG. 5 (a), R1 is a spiral tube provided in the straight tube portion P1 of the existing tube P, and the spiral tube forming strip member 1 shown in FIG. As shown in FIG. 5, the insertion portion 122 of the ridge 12 is joined so as to be inserted into the insertion portion 142 of the adjacent concave groove portion 14. At this time, the belt-like substrate 11 is used in a straight state without being bent along the narrow concave grooves 16, 17, and 17, and the formed spiral tube R1 is also in a straight state.
[0017]
As shown in FIG. 5 (b), R2 is a spiral tube provided in the straight pipe portion P2 of the existing tube P. As shown in FIG. 2, the strip-shaped member 1 for forming the spiral tube shown in FIG. 11 is formed into a spiral tube forming belt-shaped member 1 ′ that is bent along 11 narrow grooves 16, 17, 17. It forms by joining so that the insertion part 122 of the protrusion 12 may be inserted in. At this time, the formed spiral tube R <b> 2 has an expansion / contraction portion that is bent along the narrow grooves 16, 17, 17 of the belt-like substrate 11.
[0018]
Thereby, even if a tensile force is applied to the belt-like member, the stretchable portion is expanded in the width direction, and the tensile force is absorbed. As a result, even when the curvature of the curved portion of the existing pipe is large, it can be dealt with by the deformation of the telescopic portion.
[0019]
As shown in FIG. 5 (c), R3 is a spiral tube provided in the straight tube portion P3 of the existing tube P, and the spiral tube forming strip member 1 shown in FIG. As shown in FIG. 5, the insertion portion 122 of the ridge 12 is joined so as to be inserted into the insertion portion 142 of the adjacent concave groove portion 14. At this time, the belt-like substrate 11 is used in a straight state without being bent along the narrow concave grooves 16, 17, and 17, and the formed spiral tube R1 is also in a straight state.
[0020]
【The invention's effect】
Since the strip-shaped member for forming a spiral tube according to the present invention is as described above, it is possible to form a spiral tube having a stretchable portion bent along a narrow groove in the curved portion of an existing tube. Therefore, even if a tensile force acts on the belt-like member, even if the curvature is large, it can be dealt with by deformation of the expansion / contraction part, and the straight pipe part and the curved part of the existing pipe are made of the same material. Since it can be rehabilitated, workability is very good.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a strip-shaped member for forming a helical tube of the present invention.
2 is a cross-sectional view showing a deformed state of a spiral tube forming strip member shown in FIG. 1. FIG.
FIG. 3 is a cross-sectional view showing a connection state of joint portions of a spiral tube formed by winding the spiral tube forming belt-shaped member shown in FIG. 1;
4 is a cross-sectional view showing a connection state of joint portions of a spiral tube formed by winding a spiral tube-forming belt-like member in the state shown in FIG. 2. FIG.
5 is a cross-sectional view illustrating a state in which an existing pipe having a curved portion is rehabilitated by a spiral pipe formed using the spiral pipe forming belt-like member shown in FIG.
FIG. 6 is a cross-sectional view showing a helical tube formed using a conventional belt-like body.
[Explanation of symbols]
1, 1 'Strip-shaped member 11 for forming a helical tube 11 Strip-shaped substrate 12 Projection 14 Concave groove 15 Ribs 16, 17 Narrow groove 121 Insertion part 141 Insertion part

Claims (1)

帯状基板の両側縁部の片面に接合部が立設され、該帯状基板の他の片面が内側となるように螺旋状に巻回し相接する接合部同士を接合することにより螺旋管を形成することができる螺旋管形成用帯状部材であって、前記帯状基板の片面に長手方向に沿って細幅凹溝が設けられ、該帯状基板の他の片面の前記細幅凹溝の両側の部分に、長手方向に沿って2本の細幅凹溝が設けられており、それらの細幅凹溝部分で長手方向に沿って折り曲げ自在とされていることを特徴とする螺旋管形成用帯状部材。A joining portion is erected on one side of both side edges of the belt-like substrate, and a spiral tube is formed by joining the joining portions that are spirally wound and in contact with each other so that the other surface of the belt-like substrate is inside. A strip-shaped member for forming a spiral tube, wherein a narrow groove is provided on one side of the strip substrate along the longitudinal direction, and on both sides of the narrow groove on the other side of the strip substrate. A strip-shaped member for forming a helical tube, characterized in that two narrow grooves are provided along the longitudinal direction, and the narrow groove portions are foldable along the longitudinal direction.
JP12233899A 1999-04-28 1999-04-28 Strip-shaped member for spiral tube formation Expired - Fee Related JP4037558B2 (en)

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JP12233899A JP4037558B2 (en) 1999-04-28 1999-04-28 Strip-shaped member for spiral tube formation

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JP12233899A JP4037558B2 (en) 1999-04-28 1999-04-28 Strip-shaped member for spiral tube formation

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JP2000313064A JP2000313064A (en) 2000-11-14
JP4037558B2 true JP4037558B2 (en) 2008-01-23

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Publication number Priority date Publication date Assignee Title
JP1616663S (en) 2018-02-27 2018-10-29

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ207219A (en) * 1984-02-20 1988-10-28 Rib Loc Int Ltd Helically wound tube formed from flat strip with interlocking edge ribs
JPH06143420A (en) * 1992-11-04 1994-05-24 Sekisui Chem Co Ltd Beltlike body for lining of existing pipe
JP2929156B2 (en) * 1993-10-05 1999-08-03 株式会社大阪防水建設社 Pipe lining method
JP2753201B2 (en) * 1994-09-07 1998-05-18 株式会社大阪防水建設社 Joiners and strips
JP3779037B2 (en) * 1997-07-18 2006-05-24 積水化学工業株式会社 Strip for existing pipe lining

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