JP7356234B2

JP7356234B2 - Existing pipe rehabilitation structure and existing pipe rehabilitation method

Info

Publication number: JP7356234B2
Application number: JP2019039567A
Authority: JP
Inventors: 康北山; 武司寺尾; 聡俊佐藤
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 2019-03-05
Filing date: 2019-03-05
Publication date: 2023-10-04
Anticipated expiration: 2039-03-05
Also published as: JP2020143710A

Description

本発明は、老朽化した既設管を更生してなる既設管更生構造及び既設管更生方法に関し、特に既設管の内周に沿う螺旋管状の更生管を備えた既設管更生構造及び既設管更生方法に関する。 The present invention relates to an existing pipe rehabilitation structure and an existing pipe rehabilitation method formed by rehabilitating aging existing pipes, and particularly to an existing pipe rehabilitation structure and an existing pipe rehabilitation method comprising a spiral rehabilitation pipe along the inner circumference of the existing pipe. Regarding.

老朽化した下水道管等の既設管の内周面に沿って帯状部材を巻回して螺旋管状の更生管を製管することによって、前記既設管を更生する方法は公知である。
例えば特許文献１においては、螺旋管状の更生管を全長にわたって既設管の内径よりも小径に製管した後、円錐形の管拡張器を更生管の一端部から更生管の内部に挿し入れることによって、更生管の周長すなわち帯状部材のひと巻き分の長さを順次拡張させている。 BACKGROUND ART There is a known method for rehabilitating an existing pipe such as an aged sewer pipe by winding a band-like member along the inner peripheral surface of the pipe to produce a spiral pipe.
For example, in Patent Document 1, after a spiral rehabilitation pipe is made to have a diameter smaller than the inner diameter of the existing pipe over its entire length, a conical pipe dilator is inserted into the rehabilitation pipe from one end of the rehabilitation pipe. , the circumferential length of the rehabilitated pipe, that is, the length corresponding to one turn of the band-shaped member, is gradually expanded.

特許第２５２９３２０号公報Patent No. 2529320

前掲特許文献１の工法においては、更生管が管軸方向の全長にわたって拡張されて全体的に既設管の内壁と係合される。このため必ずしも拡張させなくてもよい箇所においても拡張されることになり帯状部材の無駄が多い。
本発明は、かかる事情に鑑み、螺旋管状の更生管によって既設管を更生するにあたり、帯状部材の無駄を省くことを目的とする。 In the construction method of Patent Document 1 mentioned above, the rehabilitated pipe is expanded over its entire length in the axial direction of the pipe and is entirely engaged with the inner wall of the existing pipe. For this reason, the band member is expanded even in locations that do not necessarily need to be expanded, resulting in a lot of waste of the band member.
In view of such circumstances, an object of the present invention is to eliminate waste of band-like members when rehabilitating an existing pipe using a spiral-shaped rehabilitation pipe.

前記課題を解決するため、本発明構造は、既設管の内周に沿う螺旋管状の更生管を備え、前記更生管が、螺旋状に巻回されて帯幅方向の両縁部の互いに一周ずれて隣接する縁部分どうしが接合された帯状部材によって構成された既設管更生構造であって、
前記更生管には、周長が相対的に大きい大周長部と、周長が相対的に小さい小周長部とが管軸方向に並んで設けられており、
前記大周長部が、前記小周長部よりも周方向の広範囲又は多数箇所において前記既設管の内周面と接していることを特徴とする。
必要箇所だけを大周長部とし、それ以外の箇所は小周長部とする。小周長部は大周長部よりも一周あたりの帯状部材の長さが短い。したがって、帯状部材の無駄を省ける。 In order to solve the above problems, the structure of the present invention is provided with a rehabilitation pipe in the form of a spiral tube along the inner periphery of an existing pipe, and the rehabilitation pipe is wound in a spiral shape so that both edges in the width direction of the band are shifted one turn from each other. An existing pipe rehabilitation structure constituted by a band-like member in which adjacent edge portions are joined together,
The rehabilitated pipe is provided with a large circumferential portion having a relatively large circumferential length and a small circumferential portion having a relatively small circumferential length aligned in the pipe axis direction,
The large circumferential portion is characterized in that it is in contact with the inner circumferential surface of the existing pipe in a wider range or in a larger number of locations in the circumferential direction than the small circumferential portion.
Only the necessary parts are made into large circumference parts, and the other parts are made into small circumference parts. The length of the band-shaped member per circumference in the small circumference portion is shorter than that in the large circumference portion. Therefore, waste of band-shaped members can be avoided.

前記大周長部の外周長が、前記既設管の内周長と実質等大であり、前記小周長部の外周長が、前記既設管の内周長より小さいことが好ましい。
前記大周長部は、全周にわたって既設管の内周に接することが好ましい。大周長部を既設管に対して拘束状態にしてもよい。
小周長部は、既設管の内周面と接しないようにしてもよい。小周長部を既設管に対して非拘束状態又は弱拘束状態にしてもよい。 It is preferable that the outer circumferential length of the large circumferential portion is substantially equal to the inner circumferential length of the existing pipe, and the outer circumferential length of the small circumferential portion is smaller than the inner circumferential length of the existing pipe.
It is preferable that the large circumferential portion is in contact with the inner circumference of the existing pipe over the entire circumference. The large circumference portion may be restrained relative to the existing pipe.
The small circumference portion may not be in contact with the inner peripheral surface of the existing pipe. The small circumference portion may be in an unrestricted state or a weakly restrained state with respect to the existing pipe.

前記更生管における前記既設管の端部に設けられた部分が、前記大周長部となっていることが好ましい。
これによって、更生管と既設管の端部どうしを強く拘束できる。 It is preferable that a portion of the rehabilitated pipe provided at an end of the existing pipe is the large circumference portion.
This allows the ends of the rehabilitated pipe and the existing pipe to be strongly restrained.

前記更生管における前記既設管の枝管との接続部に設けられた部分が、前記大周長部となっていることが好ましい。
これによって、更生管と枝管との接続、連通作業を容易化できる。
前記枝管としては、既設管が下水道管である場合の取付管が挙げられる。 It is preferable that a portion of the rehabilitated pipe provided at a connection portion with a branch pipe of the existing pipe is the large circumference portion.
This facilitates the connection and communication work between the rehabilitated pipe and the branch pipe.
Examples of the branch pipe include an attached pipe when the existing pipe is a sewer pipe.

本発明方法は、既設管を螺旋管状の更生管によって更生する方法であって、
帯状部材を前記既設管の内周に沿って螺旋状に巻回して、前記帯状部材の帯幅方向の両縁部の互いに一周ずれて隣接する縁部分どうしを接合することによって前記更生管を製管し、
前記更生管には周長が相対的に大きい大周長部と、周長が相対的に小さい小周長部とを管軸方向に並べて形成し、
前記大周長部を、前記小周長部よりも周方向の広範囲又は多数箇所において前記既設管の内周面と接触させることを特徴とする。 The method of the present invention is a method for rehabilitating an existing pipe using a spiral-shaped rehabilitation pipe,
The rehabilitated pipe is manufactured by winding a band-shaped member in a spiral along the inner circumference of the existing pipe, and joining adjacent edge portions of both edges in the band width direction of the band-shaped member shifted one turn from each other. manage,
The rehabilitated pipe is formed with a large circumferential portion having a relatively large circumference and a small circumferential portion having a relatively small circumferential length arranged side by side in the pipe axis direction,
The large circumferential portion is brought into contact with the inner circumferential surface of the existing pipe in a wider area or in a larger number of locations in the circumferential direction than the small circumferential portion.

前記大周長部とすべき部分を前記小周長部と同じ周長となるよう製管し、その後、前記大周長部とすべき部分の周長すなわち帯状部材のひと巻き分の長さを拡張（増大）させることが好ましい。そうすることで、製管時には更生管の全体を一様な周長にでき、製管作業を容易化できる。
なお、製管しながら周長調整することで大周長部と小周長部を作成してもよい。 A pipe is manufactured so that the portion to be the large circumference portion has the same circumference as the small circumference portion, and then the circumference of the portion to be the large circumference portion, that is, the length of one turn of the band member is expanded (increased). It is preferable. By doing so, the entire rehabilitated pipe can be made to have a uniform circumference during pipe manufacturing, and the pipe manufacturing work can be facilitated.
Note that a large circumference portion and a small circumference portion may be created by adjusting the circumference during pipe manufacturing.

前記大周長部とすべき部分における前記隣接する縁部分どうしの接合力を、前記更生管における前記大周長部とすべき部分より管軸方向の一端側の管部分における前記隣接する縁部分どうしの接合力より弱くし、
前記一端側の管部分を、前記大周長部とすべき部分の周長が拡張される向きに捩じることが好ましい。
これによって、前記捩じり工程の際、前記一端側の管部分においては前記隣接する縁部分どうしが滑ることなく、前記一端側の管部分の周長が拡張されるのを防止できる。捩じり力は、前記一端側の管部分を介して、前記大周長部とすべき部分に伝わる。前記大周長部とすべき部分においては、前記隣接する縁部分どうしの接合力が弱くなっているために、前記捩じり力によって前記隣接する縁部分どうしが滑り、周長が拡張される。 The bonding force between the adjacent edge portions in the portion that should be the large circumferential portion is the bonding force between the adjacent edge portions in the pipe portion on one end side in the pipe axis direction from the portion that should be the large circumferential portion in the rehabilitated pipe. make it weaker,
It is preferable that the tube portion on the one end side is twisted in a direction in which the circumferential length of the portion to be the large circumferential portion is expanded.
Thereby, during the twisting step, the adjacent edge portions of the tube portion on the one end side do not slip against each other, and the circumference of the tube portion on the one end side can be prevented from expanding. The torsional force is transmitted to the large circumferential portion via the tube portion on the one end side. In the portion that should be the large circumferential portion, the bonding force between the adjacent edge portions is weak, so the torsional force causes the adjacent edge portions to slide against each other, expanding the circumference.

前記製管後、前記更生管の管軸方向の前記一端側とは反対側の端部から、前記大周長部とすべき部分と前記一端側の管部分との間までの前記隣接する縁部分どうしの接合力を製管時より弱めることが好ましい。
これによって、製管時には、大周長部とすべき部分か否かの区別無く、隣接する縁部分どうしを強く接合させることができ、安定して確実に製管できる。その後、前記接合力を弱めることで、前記大周長部とすべき部分の周長を拡張させやすくなる。
前記大周長部とすべき部分の製管時に、該大周長部とすべき部分における前記隣接する縁部分どうしの接合力を、小周長部とすべき部分における前記隣接する縁部分どうしの接合力より弱くしてもよい。 After the pipe manufacturing, the adjacent edge portions from the end opposite to the one end in the pipe axial direction of the rehabilitated pipe to between the portion to be the large circumference portion and the pipe portion on the one end side. It is preferable to weaken the bonding force during pipe manufacturing.
As a result, during pipe manufacturing, adjacent edge portions can be strongly joined to each other, regardless of whether the portion should be a large circumferential length portion or not, and the pipe can be manufactured stably and reliably. Thereafter, by weakening the bonding force, it becomes easier to expand the circumference of the portion to be the large circumference portion.
When manufacturing the portion to be the large circumference portion, the bonding force between the adjacent edge portions in the portion to be the large circumference portion is made weaker than the bonding force between the adjacent edge portions in the portion to be the small circumference portion. It's okay.

前記隣接する縁部分どうしを互いの間に線状部材が挟み込まれるように凹凸嵌合させながら前記製管を行ない、その後、前記更生管の前記反対側の端部から、前記大周長部とすべき部分と前記一端側の管部分との間まで前記線状部材を引き抜き、前記一端側の管部分における前記隣接する縁部分どうし間には前記線状部材を残置させた状態で前記一端側の管部分を捩じることが好ましい。
これによって、製管時における隣接する縁部分どうしの接合力を高くできる。その後、前記大周長部とすべき部分における隣接する縁部分どうしの接合力を確実に弱めることで、前記大周長部とすべき部分の周長を拡張させやすくなる。 The pipe manufacturing is performed while the adjacent edge portions are fitted in a concave-convex manner so that the linear member is sandwiched between them, and then the large circumferential length portion should be formed from the opposite end of the rehabilitated pipe. The linear member is pulled out between the tube portion on the one end side and the tube portion on the one end side, and the linear member is left between the adjacent edge portions of the tube portion on the one end side. Preferably, the parts are twisted.
This makes it possible to increase the bonding force between adjacent edge portions during pipe manufacturing. Thereafter, by reliably weakening the bonding force between adjacent edge portions in the portion to be the large circumferential portion, it becomes easier to expand the circumferential length of the portion to be the large circumferential portion.

前記大周長部とすべき部分の全体の周長が拡張され、かつ前記大周長部とすべき部分より前記反対側の部分までは拡張が及んでいない時点で前記捩じり工程を終えることが好ましい。
これによって、大周長部とすべき部分の周長だけを拡張できる。 It is preferable to finish the twisting step when the entire circumference of the portion to be the large circumferential portion has been expanded, and the expansion has not yet reached the portion on the opposite side of the portion to be the large circumferential portion.
As a result, only the circumference of the portion that should be the large circumference portion can be expanded.

本発明によれば、更生管となる帯状部材の無駄を省くことができる。 According to the present invention, it is possible to eliminate waste of band-like members that become rehabilitation pipes.

図１は、本発明の第１実施形態に係る更生済管（既設管更生構造）の側面断面図である。FIG. 1 is a side sectional view of a rehabilitated pipe (existing pipe rehabilitation structure) according to a first embodiment of the present invention. 図２は、前記更生済管の更生管を構成する帯状部材の断面図である。FIG. 2 is a sectional view of a band-like member constituting the rehabilitated pipe. 図３は、前記更生管における帯状部材の第１嵌合部及び第２嵌合部どうしの接合部分を示し、図１の円部ＩＩＩの断面図である。FIG. 3 shows a joint portion between the first fitting part and the second fitting part of the band-shaped member in the rehabilitated pipe, and is a sectional view of the circular part III in FIG. 1. 図４は、前記更生管における取付管との接続構造を示し、図１の円部ＩＶの断面図である。FIG. 4 shows the connection structure of the rehabilitated pipe with the attachment pipe, and is a sectional view of the circular portion IV in FIG. 1. 図５は、図４のＶ－Ｖ線に沿う、前記更生管の中間部分の平面図である。FIG. 5 is a plan view of the intermediate portion of the rehabilitated pipe taken along line VV in FIG. 4. 図６は、前記更生管の製管工程を示す断面図である。FIG. 6 is a sectional view showing the pipe manufacturing process of the rehabilitated pipe. 図７は、図６のＶＩＩ－ＶＩＩ線に沿う、前記製管に用いる元押し式製管機の正面図である。FIG. 7 is a front view of the extrusion type pipe making machine used for the pipe making, taken along line VII-VII in FIG. 6. 図８（ａ）は、製管時の前記接合部分を示す断面図である。図８（ｂ）は、接合力弱化時の前記接合部分を示す断面図である。FIG. 8(a) is a sectional view showing the joint portion during pipe manufacturing. FIG. 8(b) is a sectional view showing the bonded portion when the bonding force is weakened. 図９は、前記更生管の到達側端部の固定工程を示す断面図である。FIG. 9 is a cross-sectional view showing a fixing process of the reaching end of the rehabilitated pipe. 図１０は、前記更生管の到達側管端領域の前記接合部分の接合力弱化工程を示す断面図である。FIG. 10 is a cross-sectional view showing a process of weakening the joining force of the joining portion of the reach-side pipe end region of the rehabilitated pipe. 図１１は、前記到達側管端領域の拡張工程を示す断面図である。FIG. 11 is a sectional view showing the step of expanding the reaching side tube end region. 図１２は、前記更生管の到達側から中間の接続領域までの前記接合部分の接合力弱化工程を示す断面図である。FIG. 12 is a cross-sectional view showing a process of weakening the joining force of the joining portion from the reaching side of the rehabilitated pipe to the intermediate connection region. 図１３は、前記接続領域の拡張工程を示す断面図である。FIG. 13 is a sectional view showing the step of expanding the connection region. 図１４は、前記更生管の中間から発進側端部までの前記接合部分の接合力弱化工程を示す断面図である。FIG. 14 is a cross-sectional view showing a process of weakening the joint force of the joint portion from the middle of the rehabilitated pipe to the starting end. 図１５は、前記更生管の発進側管端領域の拡張工程を示す断面図である。FIG. 15 is a cross-sectional view showing a step of expanding the starting end region of the rehabilitated pipe. 図１６は、本発明の第２実施形態に係る帯状部材の断面図である。FIG. 16 is a sectional view of a band-shaped member according to a second embodiment of the present invention. 図１７（ａ）は、前記第２実施形態における製管時の帯状部材の第１嵌合部及び第２嵌合部の接合部分を示す断面図である。図１７（ｂ）は、接合力弱化時の前記接合部分を示す断面図である。FIG. 17(a) is a cross-sectional view showing a joint portion between the first fitting part and the second fitting part of the band-shaped member during pipe manufacturing in the second embodiment. FIG. 17(b) is a sectional view showing the bonded portion when the bonding force is weakened. 図１８は、本発明の第３実施形態に係る帯状部材の断面図である。FIG. 18 is a sectional view of a band-shaped member according to a third embodiment of the present invention. 図１９は、前記第３実施形態の更生済管における大周長部の断面図である。FIG. 19 is a sectional view of a large circumferential portion of the rehabilitated pipe of the third embodiment. 図２０は、前記第３実施形態において、自走式製管機によって更生管を製管する様子を更生管の延伸方向前方から見た解説側面図である。FIG. 20 is an explanatory side view showing how a rehabilitated pipe is produced by a self-propelled pipe-making machine in the third embodiment, as viewed from the front in the extending direction of the rehabilitated pipe. 図２１は、前記第３実施形態において、自走式製管機によって更生管を製管する様子を概略的に示す斜視図である。FIG. 21 is a perspective view schematically showing how a rehabilitated pipe is manufactured by a self-propelled pipe manufacturing machine in the third embodiment. 図２２は、本発明の第４実施形態に係る帯状部材の断面図である。FIG. 22 is a sectional view of a band-shaped member according to a fourth embodiment of the present invention. 図２３は、本発明の第５実施形態に係る帯状部材の断面図である。FIG. 23 is a sectional view of a band-shaped member according to a fifth embodiment of the present invention. 図２４は、本発明の第６実施形態に係る帯状部材の断面図である。FIG. 24 is a sectional view of a band-shaped member according to a sixth embodiment of the present invention. 図２５は、前記第６実施形態の更生済管における大周長部の断面図である。FIG. 25 is a sectional view of a large circumferential portion of the rehabilitated pipe of the sixth embodiment.

以下、本発明の実施形態を図面にしたがって説明する。
＜第１実施形態＞
図１は、本発明の第１実施形態に係る更生済管１Ａ（既設管更生構造）を示したものである。更生済管１Ａは、既設管１と、更生管３を備えている。老朽化した既設管１の内周に更生管３がライニングされることによって、既設管１が更生されている。更生対象の既設管１は、例えば地中に埋設された下水道管である。既設管１の中間部には、１又は複数（図では１つだけ図示）の取付管２（枝管）が接続されている。
なお、本発明の既設管は、下水道管に限定されず、上水道管、農業用水管、ガス管、水力発電導水管などであってもよい。 Embodiments of the present invention will be described below with reference to the drawings.
<First embodiment>
FIG. 1 shows a rehabilitated pipe 1A (existing pipe rehabilitation structure) according to a first embodiment of the present invention. The rehabilitated pipe 1A includes an existing pipe 1 and a rehabilitated pipe 3. The existing pipe 1 is rehabilitated by lining the inner periphery of the aged existing pipe 1 with a rehabilitated pipe 3. The existing pipe 1 to be rehabilitated is, for example, a sewer pipe buried underground. One or more (only one is shown in the figure) attachment pipes 2 (branch pipes) are connected to the intermediate portion of the existing pipe 1.
Note that the existing pipe of the present invention is not limited to a sewer pipe, but may be a water supply pipe, an agricultural water pipe, a gas pipe, a hydroelectric power generation water pipe, or the like.

更生管３の断面形状は、円形（真円）でもよく、四角形その他の多角形でもよく、馬蹄形などの異形状でもよい。
更生管３は、帯状部材１０によって構成されている。帯状部材１０が、既設管１の内周に沿って螺旋状に巻回され、螺旋管状の更生管３に製管されている。 The cross-sectional shape of the rehabilitated pipe 3 may be circular (perfect circle), quadrangular or other polygonal, or irregularly shaped such as a horseshoe.
The rehabilitated pipe 3 is constituted by a band-shaped member 10. A strip member 10 is spirally wound along the inner periphery of the existing pipe 1, and is manufactured into a helical rehabilitation pipe 3.

図２に示すように、帯状部材１０は、平帯部１１と、嵌合部１３，１４と、リブ１２を含み、一定の断面形状に形成されて、同図の紙面と直交する帯長方向へ延びている。帯状部材１０の材質は、ポリ塩化ビニル（ＰＶＣ）などの合成樹脂である。平坦な平帯部１１における帯幅方向（図２（ａ）において左右）の一方側の縁部に２つ（複数列）の凹溝１３ｃ，１３ｄを含む第１嵌合部１３が形成され、他方側の縁部に２つ（複数列）の凸条１４ｃ，１４ｄを含む第２嵌合部１４が形成されている。平帯部１１の帯幅方向の中間部には３つ（複数）のリブ１２が設けられている。 As shown in FIG. 2, the strip member 10 includes a flat strip portion 11, fitting portions 13 and 14, and ribs 12, and is formed in a constant cross-sectional shape in the strip length direction perpendicular to the plane of the drawing. It extends to The material of the band member 10 is synthetic resin such as polyvinyl chloride (PVC). A first fitting part 13 including two (multiple rows) of grooves 13c and 13d is formed on one edge of the flat band part 11 in the band width direction (left and right in FIG. 2(a)), A second fitting portion 14 including two (multiple rows) of protrusions 14c and 14d is formed on the other edge. Three (plural) ribs 12 are provided in the middle portion of the flat band portion 11 in the band width direction.

図３に示すように、帯状部材１０を螺旋状に巻回してなる更生管３においては、第１嵌合部１３と第２嵌合部１４との互いに一周ずれて隣接する部分（縁部分）どうしが接合されている。詳しくは、互いに対応する凸条１４ｃ及び凹溝１３ｃどうし、並びに凸条１４ｄ及び凹溝１３ｄどうしが嵌合（接合）されている。リブ１２は、更生管３の外周側（図３において上側）へ突出されている。 As shown in FIG. 3, in the rehabilitated pipe 3 formed by spirally winding the strip member 10, the first fitting portion 13 and the second fitting portion 14 are adjacent to each other with a one-round shift (edge portion). They are joined together. Specifically, the corresponding protrusions 14c and grooves 13c and the corresponding protrusions 14d and grooves 13d are fitted (joined) together. The rib 12 projects toward the outer circumferential side (upper side in FIG. 3) of the rehabilitation pipe 3.

さらに、図３に示すように、更生管３においては、２つ（複数列）の凸条１４ｃ，１４ｄのうち、帯幅方向の外側（一部）の凸条１４ｃは、根元部分において切断され、平帯部１１から分離されている。残りの凸条１４ｄは、平帯部１１と一体に連なっている。 Furthermore, as shown in FIG. 3, in the rehabilitated pipe 3, of the two (multiple rows) protrusions 14c, 14d, the outer (part) protrusion 14c in the band width direction is cut at the root portion. , separated from the flat band portion 11. The remaining protrusions 14d continue integrally with the flat band portion 11.

図２２に示すように、凹溝１３ｃの内周面と凸条１４ｃとの間には、接着剤５１が設けられている。接着剤５１を介して、凸条１４ｃが凹溝１３ｃひいては第１嵌合部１３と強固に接合されている。接着剤５１としては、例えばホットメルト接着剤が用いられている。
凹溝１３ｄと凸条１４ｄとの間には、滑り性シール剤５２が設けられている。滑り性シール剤５２を介して凸条１４ｄが凹溝１３ｄひいては第１嵌合部１３と接合されている。滑り性シール剤５２は、凸条１４ｄが凹溝１３ｄに沿って滑るのを許容する。滑り性シール剤５２としては、例えばシリコーンシーラントなどの湿気硬化型接着剤が用いられている。 As shown in FIG. 22, an adhesive 51 is provided between the inner peripheral surface of the groove 13c and the protrusion 14c. The protrusion 14c is firmly joined to the groove 13c and, in turn, to the first fitting portion 13 via the adhesive 51. As the adhesive 51, for example, a hot melt adhesive is used.
A slippery sealant 52 is provided between the groove 13d and the protrusion 14d. The protruding strip 14d is joined to the groove 13d and, in turn, to the first fitting portion 13 via the slippery sealant 52. The slippery sealant 52 allows the protrusions 14d to slide along the grooves 13d. As the slippery sealant 52, a moisture curing adhesive such as a silicone sealant is used, for example.

図１に示すように、更生管３には、大周長部３ａと、小周長部３ｂとが管軸方向に並んで設定されている。大周長部３ａは、周長すなわち帯状部材１０の一巻き分の長さが相対的に大きい。小周長部３ｂは、周長が相対的に小さい。更生管３が円形断面の場合、大周長部３ａは大径であり、小周長部３ｂは小径である。 As shown in FIG. 1, the rehabilitated pipe 3 has a large circumferential portion 3a and a small circumferential portion 3b arranged side by side in the tube axis direction. The large circumference portion 3a has a relatively large circumference, that is, a length corresponding to one turn of the band member 10. The small circumference portion 3b has a relatively small circumference. When the rehabilitated pipe 3 has a circular cross section, the large circumferential portion 3a has a large diameter, and the small circumferential portion 3b has a small diameter.

大周長部３ａは、小周長部３ｂよりも周方向の広範囲又は多数箇所において既設管１の内周面と接している。好ましくは、大周長部３ａは、全周にわたって既設管１の内周に接している。大周長部３ａの外周長が、既設管１の内周長と実質的に同じ大きさになっている。より好ましくは、大周長部３ａは既設管１の内周面に強く押し当てられることで既設管１に対して拘束状態になっている。 The large circumferential portion 3a is in contact with the inner circumferential surface of the existing pipe 1 in a wider range or in a larger number of locations in the circumferential direction than the small circumferential portion 3b. Preferably, the large circumferential portion 3a is in contact with the inner circumference of the existing pipe 1 over the entire circumference. The outer circumferential length of the large circumferential portion 3a is substantially the same as the inner circumferential length of the existing pipe 1. More preferably, the large circumferential portion 3a is strongly pressed against the inner circumferential surface of the existing pipe 1, so that it is in a restrained state with respect to the existing pipe 1.

これに対して、小周長部３ｂの外周長は既設管１の内周長より小さい。小周長部３ｂは全域にわたって既設管１の内周面と殆ど接していない。或いは、小周長部３ｂの底部だけが既設管１の底部と接していてもよい。小周長部３ｂは、既設管１に対して非拘束状態であるか、又は大周長部３ａよりも弱く拘束された弱拘束状態となっている。 On the other hand, the outer circumferential length of the small circumferential length portion 3b is smaller than the inner circumferential length of the existing pipe 1. The small circumferential length portion 3b is hardly in contact with the inner peripheral surface of the existing pipe 1 over the entire area. Alternatively, only the bottom of the small circumference portion 3b may be in contact with the bottom of the existing pipe 1. The small circumference portion 3b is in an unrestricted state with respect to the existing pipe 1, or is in a weakly restrained state in which it is restrained weaker than the large circumference portion 3a.

図１に示すように、具体的には、更生管３における両側の管端領域３１，３９及び中間の接続領域３２が、それぞれ大周長部３ａとなっている。管端領域３１，３９は、既設管１の端部１ｅに設けられた部分に該当する。接続領域３２は、既設管の枝管との接続部に設けられた部分に該当する。 As shown in FIG. 1, specifically, the pipe end regions 31 and 39 on both sides of the rehabilitated pipe 3 and the intermediate connection region 32 each serve as a large circumferential portion 3a. The tube end regions 31 and 39 correspond to portions provided at the end portion 1e of the existing tube 1. The connection area 32 corresponds to a portion provided at a connection portion of an existing pipe with a branch pipe.

図４及び図５に示すように、接続領域３２の中央部には、取付管２に連なる連通口３２ｃが形成されている。連通口３２ｃの周辺における既設管１と更生管３との間には封止材５が充填されて封止されている。 As shown in FIGS. 4 and 5, a communication port 32c connected to the attachment tube 2 is formed in the center of the connection area 32. A sealant 5 is filled and sealed between the existing pipe 1 and the rehabilitated pipe 3 around the communication port 32c.

図１に示すように、一方の管端領域３１と接続領域３２との間の中間領域３３Ａ、及び接続領域３２と他方の管端領域３９との間の中間領域３３Ｂが、それぞれ小周長部３ｂとなっている。
更生管３における各大周長部３ａ（３１，３９，３２）と小周長部３ｂ（３３Ａ，３３Ｂ）との間の部分は、小周長部３ｂへ向かって縮径するテーパ部３４Ａ，３４Ｂ，３４Ｃ，３４Ｄとなっている。 As shown in FIG. 1, an intermediate region 33A between one tube end region 31 and the connection region 32, and an intermediate region 33B between the connection region 32 and the other tube end region 39 are the small circumference portion 3b, respectively. It has become.
The portions of the rehabilitated pipe 3 between the large circumferential portions 3a (31, 39, 32) and the small circumferential portions 3b (33A, 33B) are tapered portions 34A, 34B, 34C, 34D whose diameter decreases toward the small circumferential portions 3b. It has become.

図１に示すように、大周長部３ａ（３１，３９，３２）と小周長部３ｂは、互いにヘリカル状態（リード角、ピッチなど）が異なっている。大周長部３ａにおける螺旋のリード角θ_３ａは、小周長部３ｂにおける螺旋のリード角θ_３ｂより小さい（θ_３ａ＜θ_３ｂ）。大周長部３ａにおける螺旋のピッチＰ_３ａは、小周長部３ｂにおける螺旋のピッチＰ_３ｂより小さい（Ｐ_３ａ＜Ｐ_３ｂ）。 As shown in FIG. 1, the large circumference portion 3a (31, 39, 32) and the small circumference portion 3b have different helical states (lead angle, pitch, etc.). The lead angle θ _3a of the spiral in the large circumference portion 3a is smaller than the lead angle θ 3b of the spiral in the small circumference portion _3b (θ _3a <θ _3b ). The spiral pitch P _3a in the large circumference portion 3a is smaller than the spiral pitch P 3b in the small circumference portion _3b (P _3a <P _3b ).

前記の更生管３は次のようにして作成される。ひいては前記老朽化した既設管１が次のようにして更生される。
＜製管工程＞
図６及び図７に示すように、元押し式製管機２０を用意し、該製管機２０を発進側の人孔４の底部に設置する。地上の巻取りドラム（図示省略）から帯状部材１０を順次繰り出して製管機２０に供給する。製管機２０において、帯状部材１０を螺旋状に巻回し、嵌合部１３，１４の互いに一周ずれて隣接する部分どうしを嵌合することで、更生管３を順次製管する。
製管時の更生管３の外径（製管径）は、既設管１の内径より小さくする。好ましくは、製管径は、小周長部３ｂの所望外径に合わせる。
好ましくは、前記の製管工程前に予め嵌合部１３の凹溝１３ｃにはホットメルト性の接着剤５１を設けておき、かつ凹溝１３ｄにはシール剤５２を設けておく。そして、対応する凸条１４ｃ，１４ｄ及び凹溝１３ｃ、１３ｄどうしの嵌合と前後して接着剤５１を加熱溶融することによって、凸条１４ｃと凹溝１３ｃひいては嵌合部１３，１４どうしを接着剤５１によって接着する。
製管された更生管３を元押し式製管機２０によって既設管１の内部へ向けて順次押し出す。
図示は省略するが、元押し式に代えて、牽引式の製管機を用いて、更生管３を既設管１の反対側からウインチで引き寄せてもよい。 The rehabilitated pipe 3 described above is created as follows. Furthermore, the aged existing pipe 1 is rehabilitated in the following manner.
<Pipe manufacturing process>
As shown in FIGS. 6 and 7, a main push type pipe making machine 20 is prepared, and the pipe making machine 20 is installed at the bottom of the manhole 4 on the starting side. The strip members 10 are sequentially unwound from a winding drum (not shown) on the ground and supplied to a pipe making machine 20. In the pipe making machine 20, the belt-shaped member 10 is wound helically, and the parts of the fitting parts 13 and 14 that are adjacent to each other and are shifted one turn from each other are fitted to each other, thereby manufacturing the rehabilitated pipe 3 one after another.
The outer diameter of the rehabilitated pipe 3 during pipe production (pipe production diameter) is made smaller than the inner diameter of the existing pipe 1. Preferably, the pipe diameter is adjusted to the desired outer diameter of the small circumference portion 3b.
Preferably, hot-melt adhesive 51 is provided in advance in the groove 13c of the fitting portion 13, and a sealant 52 is provided in the groove 13d before the pipe manufacturing step. Then, by heating and melting the adhesive 51 before and after the fitting of the corresponding protrusions 14c and 14d and grooves 13c and 13d, the protrusions 14c and grooves 13c and eventually the fitting parts 13 and 14 are bonded together. The adhesive 51 is used for adhesion.
The manufactured rehabilitated pipe 3 is sequentially pushed out into the existing pipe 1 by the extrusion type pipe manufacturing machine 20.
Although not shown in the drawings, instead of the original pushing type, a towing type pipe making machine may be used to pull the rehabilitated pipe 3 from the opposite side of the existing pipe 1 with a winch.

図６に示すように、前記帯状部材１０の繰り出しと併行して、ワイヤ４１（線状部材）をワイヤ繰出リール４２から繰り出して製管機２０に導入する。図８（ａ）に示すように、製管機２０において嵌合部１３，１４どうしを嵌合させる際、ワイヤ４１を嵌合部１３，１４（隣接する縁部分）どうしの間に挟み込む。具体的には、第２嵌合部１４の凸条１４ｃ，１４ｄの間の部分と、第１嵌合部１３との間にワイヤ４１を挟み付ける。好ましくは、第１嵌合部１３には半円状断面の保持溝１３ｆを形成しておく。該保持溝１３ｆにワイヤ４１を嵌めて保持する。ワイヤ４１は、凸条１４ｃの根元部分の側部に配置される。 As shown in FIG. 6, in parallel with the feeding of the strip member 10, a wire 41 (linear member) is fed out from the wire feeding reel 42 and introduced into the pipe making machine 20. As shown in FIG. 8A, when fitting the fitting parts 13 and 14 together in the pipe making machine 20, the wire 41 is sandwiched between the fitting parts 13 and 14 (adjacent edge portions). Specifically, the wire 41 is sandwiched between the first fitting part 13 and the portion between the protrusions 14c and 14d of the second fitting part 14. Preferably, the first fitting portion 13 is formed with a holding groove 13f having a semicircular cross section. The wire 41 is fitted and held in the holding groove 13f. The wire 41 is disposed on the side of the root portion of the protrusion 14c.

図９に示すように、更生管３の到達側端部３ｅが到達側人孔４Ｂまで達することで、製管工程が終了する。この時点の更生管３は、全域にわたって既設管１より小径の均一径（均一周長）になっている。大周長部３ａとなるべき管端領域３１，３９及び接続領域３２についても、小周長部３ｂとなる中間領域３３Ａ，３３Ｂと同じ小径（小周長）になっている。 As shown in FIG. 9, the pipe-making process is completed when the reach-side end 3e of the rehabilitated pipe 3 reaches the reach-side manhole 4B. At this point, the rehabilitated pipe 3 has a uniform diameter (uniform circumference) that is smaller than the existing pipe 1 over the entire area. The tube end regions 31, 39 and the connection region 32, which are to become the large circumferential portion 3a, also have the same small diameter (small circumferential length) as the intermediate regions 33A, 33B, which are to become the small circumferential portion 3b.

図９に示すように、製管工程の終了時におけるワイヤ４１は、更生管３の全域にわたって螺旋状に巻かれている。該ワイヤ４１を、到達側端部３ｅの近くから引き出して折り返す。該折り返し部４１ｃより先のワイヤ４１を更生管３の内部空間に通すとともに、製管機２０の側部のワイヤ巻取リール４３に巻き付けておく。 As shown in FIG. 9, the wire 41 at the end of the pipe manufacturing process is spirally wound over the entire area of the rehabilitated pipe 3. The wire 41 is pulled out near the reaching end 3e and folded back. The wire 41 beyond the folded portion 41c is passed through the internal space of the rehabilitated pipe 3, and is wound around a wire take-up reel 43 on the side of the pipe making machine 20.

図９に示すように、好ましくは、到達側端部３ｅを固定冶具８によって既設管１に対して固定（回転止め）する。固定冶具８としては、例えば更生管３を直径方向に貫く棹部材を用いることができる。
なお、到達側端部３ｅは必ずしも既設管１に対して固定する必要がなく、固定冶具８を省略してもよい。 As shown in FIG. 9, preferably, the reaching end 3e is fixed (rotated) to the existing pipe 1 using a fixing jig 8. As the fixing jig 8, for example, a rod member that penetrates the rehabilitation pipe 3 in the diametrical direction can be used.
Note that the reaching end 3e does not necessarily need to be fixed to the existing pipe 1, and the fixing jig 8 may be omitted.

図７に示すように、発進側の人孔４の底部には、ガイドレール２５を設置する。ガイドレール２５の延び方向を、更生管３及び既設管１の管軸方向（図７の紙面直交方向）へ向ける。元押し製管機２０の底部にはスライドガイド２６を設け、該スライドガイド２６をガイドレール２５にスライド可能に嵌合させる。これによって、元押し製管機２０をガイドレール２５の延び方向（前記管軸方向）へスライド可能にしておく。 As shown in FIG. 7, a guide rail 25 is installed at the bottom of the manhole 4 on the starting side. The guide rail 25 extends in the direction of the pipe axes of the rehabilitated pipe 3 and the existing pipe 1 (direction perpendicular to the paper plane of FIG. 7). A slide guide 26 is provided at the bottom of the extrusion pipe making machine 20, and the slide guide 26 is slidably fitted into the guide rail 25. This allows the extrusion tube making machine 20 to slide in the direction in which the guide rail 25 extends (the tube axis direction).

＜接合力弱化工程＞
そして、図１０に示すように、ワイヤ巻取リール４３によって、ワイヤ４１を巻き取りながら管軸方向に引っ張る。これによって、ワイヤ４１の折り返し部４１ｃが、到達側端部３９から元押し側へ向けて螺旋状に移行される。このとき、図８（ｂ）に示すように、未拡張の到達側管端領域３９における凸条１４ｃ，１４ｄのうち一部の凸条１４ｃの根元部分が、前記ワイヤ４１の折り返し部４１ｃによって切断される。このため、到達側管端領域３９における嵌合部１３，１４どうしの接合力が、製管時よりも弱められる。切断後の凸条１４ｃは、凹溝１３ｃ内に嵌った状態で残置される。 <Joining force weakening process>
Then, as shown in FIG. 10, the wire 41 is wound up and pulled in the tube axis direction by the wire take-up reel 43. As a result, the folded portion 41c of the wire 41 is spirally moved from the reach side end portion 39 toward the original push side. At this time, as shown in FIG. 8(b), the root portion of some of the protrusions 14c and 14d in the unexpanded reaching side tube end region 39 is cut by the folded portion 41c of the wire 41. be done. For this reason, the bonding force between the fitting portions 13 and 14 in the reaching side tube end region 39 is weakened compared to that during tube manufacturing. The cut protrusions 14c are left in the grooves 13c.

図１０に示すように、ワイヤ４１の折り返し部４１ｃが、大周長部３ａとすべき到達側管端領域３９を超えて、該管端領域３９より少し発進側（図１０において左側）の位置（管端領域３９と管部分３５との間）に達したとき、ワイヤ４１の巻き取りを一旦停止する。これによって、到達側端部３ｅから前記折り返し部４１ｃの位置までの部分における嵌合部１３，１４どうしの接合力が、更生管３における前記折り返し部４１ｃの位置より発進側（管軸方向の一端側、図１０において左側）の管部分３５における嵌合部１３，１４どうしの接合力より弱くなる。 As shown in FIG. 10, the folded portion 41c of the wire 41 is located at a position (on the left side in FIG. 10) beyond the reaching side tube end region 39 that should be the large circumference portion 3a, and slightly on the starting side (left side in FIG. 10) from the tube end region 39. When the end region 39 and the tube section 35 are reached, the winding of the wire 41 is temporarily stopped. As a result, the bonding force between the fitting parts 13 and 14 in the portion from the arrival side end 3e to the position of the folded part 41c is increased from the position of the folded part 41c in the rehabilitated pipe 3 to the starting side (one end in the pipe axis direction). The bonding force between the fitting portions 13 and 14 in the tube portion 35 (on the left side in FIG. 10) is weaker than that between the fitting portions 13 and 14.

＜拡張工程＞
続いて、図１１に示すように、元押し製管機２０を再駆動して、該元押し製管機２０によって管部分３５を、帯状部材１０の一巻き分の長さ（周長）が拡張される向きａに捩じる。つまり、管部分３５をａ方向へ回転させながら到達側管端領域３９へ向けて押し込む。好ましくは、図１１の矢印線ａ_１８にて示すように、元押し製管機２０によって、帯状部材１０における未製管の帯部分１８を管部分３５に向けて送り込んで、捩じり力を発生させる。 <Expansion process>
Subsequently, as shown in FIG. 11, the extrusion tube making machine 20 is driven again, and the tube portion 35 is made by the extrusion tube making machine 20 to the length (circumference) of one turn of the strip member 10. Twist in the direction of expansion a. In other words, the tube portion 35 is pushed toward the destination tube end region 39 while rotating in the direction a. Preferably, as shown by the arrow line a ₁₈ in FIG. 11, the unmade tube section 18 of the strip member 10 is fed toward the tube section 35 by the extrusion tube making machine 20 to apply torsional force. generate.

管部分３５においては嵌合部１３，１４どうしの接合力が製管時のまま高く維持されているから、前記捩じり操作によって、管部分３５の全体が一体となって回転される。このため、管部分３５における帯状部材１０の一巻き分の長さ（周長）は拡張されず、管部分３５は拡径されない。前記捩じり力は、管部分３５を介して到達側管端領域３９に伝わる。 In the tube portion 35, the joining force between the fitting portions 13 and 14 remains high as it was during tube manufacturing, so the twisting operation rotates the entire tube portion 35 as one unit. Therefore, the length (periphery) of one turn of the strip member 10 in the tube portion 35 is not expanded, and the diameter of the tube portion 35 is not expanded. Said torsional forces are transmitted via the tube section 35 to the end tube end region 39 .

到達側管端領域３９においては、嵌合部１３，１４どうしの接合力が弱められているために、管部分３５から伝わった捩じり力Ｆ_３９が帯状部材１０の巻き方向に加わることで、嵌合部１３，１４どうしが前記巻き方向に沿って互いにずれるように滑る。これによって、到達側管端領域３９における帯状部材１０の一巻き分の長さが拡張され、到達側管端領域３９が大周長部３ａとなる。該拡張現象は、到達側管端領域３９における管部分３５側の部分から到達側端部３ｅへ向かって順次波及していく。拡張済の到達側管端領域３９と管部分３５との間にはテーパ部３４Ｄが形成される。 In the reaching side tube end region 39, since the joining force between the fitting parts 13 and 14 is weakened, the torsional force _F39 transmitted from the tube portion 35 is applied in the winding direction of the strip member 10. , the fitting parts 13 and 14 slide so as to be shifted from each other along the winding direction. As a result, the length of one turn of the strip member 10 in the reaching side tube end region 39 is expanded, and the reaching side tube end region 39 becomes the large circumferential portion 3a. The expansion phenomenon sequentially spreads from the portion of the reaching side tube end region 39 on the tube portion 35 side toward the reaching side end portion 3e. A tapered portion 34D is formed between the expanded reaching side tube end region 39 and the tube portion 35.

到達側管端領域３９のヘリカル形状は、前記拡張に伴ってリード角θ_３ａが小さくなり、ピッチＰ_３ａが小さくなるように変化する。このため、到達側管端領域３９の軸長が縮み、到達側管端領域３９における管部分３５側の端部が、到達側端部３ｅへ向けてずれる。これに伴って、管部分３５が全体的に到達側管端領域３９へ向けてずれる。更に、図１１の矢印線ａ_２０に示すように、元押し製管機２０が、管部分３５に引っ張られることで、ガイドレール２５に沿って到達側管端領域３９側すなわち押し込み側へスライドされる。
逆に言うと、元押し製管機２０のスライドによって、管部分３５の到達側管端領域３９側への位置ずれを許容でき、到達側管端領域３９のヘリカル形状の変化を許容できる。したがって、到達側管端領域３９を円滑に拡径させることができ、拡径時に元押し製管機２０が抵抗となって嵌合部１３，１４が外れるのを防止できる。
拡径された到達側管端領域３９が、既設管１の内周面に全周にわたって押し当てられることで、既設管１に拘束される。
到達側管端領域３９の全体が既設管１の内周面に押し当てられて拘束されたら、製管機２０を停止する。
なお、到達側管端領域３９の全域を一工程で拡張させるのに代えて、ワイヤ４１を複数回に分けて到達側端部３ｅから段階的に巻き取り、一回あたりの巻き取った部分ごとに順次拡張させてもよい。 The helical shape of the reaching side tube end region 39 changes so that the lead angle θ _3a becomes smaller and the pitch P _3a becomes smaller with the expansion. Therefore, the axial length of the reach-side tube end region 39 is shortened, and the end of the reach-side tube end region 39 on the tube portion 35 side is shifted toward the reach-side end 3e. Accordingly, the entire tube portion 35 shifts toward the reaching side tube end region 39. Furthermore, as shown by the arrow line a ₂₀ in FIG. 11, the extrusion tube making machine 20 is pulled by the tube portion 35 and is slid along the guide rail 25 toward the reaching side tube end region 39 side, that is, toward the pushing side. Ru.
In other words, by sliding the extrusion tube making machine 20, displacement of the tube portion 35 toward the destination tube end region 39 can be tolerated, and a change in the helical shape of the destination tube end region 39 can be tolerated. Therefore, the diameter of the reaching side tube end region 39 can be expanded smoothly, and it is possible to prevent the fitting portions 13 and 14 from coming off due to resistance caused by the original tube making machine 20 during diameter expansion.
The diameter-expanded reaching side tube end region 39 is pressed against the inner peripheral surface of the existing pipe 1 over its entire circumference, thereby being restrained by the existing pipe 1.
When the entire reaching side pipe end region 39 is pressed against and restrained by the inner circumferential surface of the existing pipe 1, the pipe making machine 20 is stopped.
Note that instead of expanding the entire area of the reaching side tube end region 39 in one step, the wire 41 is wound in stages from the reaching side end 3e in multiple times, and each wound portion is may be expanded sequentially.

次に、図１２に示すように、再びワイヤ巻取リール４３によって、ワイヤ４１を巻き取りながら管軸方向に引っ張り、折り返し部４１ｃを未拡径の接続領域３２より少し発進側（図１２において左側）の位置（接続領域３２と管部分３６との間）まで移行させる。該位置までの凸条１４ｃの根元部分が、ワイヤ４１によって新たに切断される（図８（ｂ）参照）。したがって、当該新たに切断された部分の嵌合部１３，１４どうしの接合力が製管時よりも弱められる。更生管３全体としては、到達側端部３ｅから接続領域３２より少し発進側の位置までにおける嵌合部１３，１４どうしの接合力が製管時よりも弱くなる。
元押し製管機２０は、ガイドレール２５に沿って押し込み側とは逆側（図１２において左側）の初期位置に戻しておく。 Next, as shown in FIG. 12, the wire 41 is again wound up and pulled in the tube axis direction by the wire take-up reel 43, so that the folded portion 41c is slightly closer to the starting side than the unexpanded connection area 32 (left side in FIG. 12). ) (between the connecting region 32 and the tube section 36). The root portion of the protrusion 14c up to this position is newly cut by the wire 41 (see FIG. 8(b)). Therefore, the joining force between the fitting portions 13 and 14 of the newly cut portion is weaker than that during pipe manufacturing. In the rehabilitated pipe 3 as a whole, the joining force between the fitting parts 13 and 14 from the reaching end 3e to a position slightly closer to the starting side than the connecting region 32 is weaker than during pipe manufacturing.
The extrusion pipe making machine 20 is returned to the initial position along the guide rail 25 on the side opposite to the pushing side (left side in FIG. 12).

次に、図１３に示すように、元押し製管機２０を再度駆動して、未製管の帯部分１８を送り込み、該送り込む力によって、接続領域３２より発進側の管部分３６を拡張方向ａへ捩じる。管部分３６においては、嵌合部１３，１４どうしの接合力が製管時のまま高く維持されているために、前記捩じり操作による拡張は起きず、管部分３６の全体が一体的に回転される。該管部分３６を介して、接続領域３２に捩じり力Ｆ_３２が加わり、接続領域３２における嵌合部１３，１４どうしが巻き方向に沿って互いにずれるように滑り、接続領域３２における帯状部材１０の一巻き分の長さが拡張される（拡張工程）。拡張された接続領域３２が、既設管１の内周面の全周にわたって押し当てられて拘束される（拘束工程）。接続領域３２のヘリカル形状は、拡張（拡径）に伴ってリード角θ_３ａ及びピッチＰ_３ａが小さくなるように変化し、接続領域３２の軸長が縮む。このとき、元押し製管機２０が押し込み側（図１３において右側）へスライドされることで、接続領域３２を円滑に拡径させることができる。 Next, as shown in FIG. 13, the original tube making machine 20 is driven again to feed the band portion 18 of the unmade tube, and the feeding force causes the tube portion 36 on the starting side from the connection area 32 to expand in the expansion direction. Twist to a. In the tube portion 36, the joining force between the fitting portions 13 and 14 is maintained as high as during tube manufacturing, so expansion due to the twisting operation does not occur, and the entire tube portion 36 is integrally formed. be rotated. A torsional force F ₃₂ is applied to the connection region 32 through the tube portion 36, and the fitting portions 13 and 14 in the connection region 32 slide so as to be displaced from each other along the winding direction, and the strip member in the connection region 32 The length of one turn of 10 is expanded (expansion step). The expanded connection region 32 is pressed and restrained over the entire inner peripheral surface of the existing pipe 1 (restraint step). The helical shape of the connection region 32 changes so that the lead angle θ _3a and the pitch P _3a become smaller as the connection region 32 expands (diameter enlargement), and the axial length of the connection region 32 decreases. At this time, the diameter of the connecting region 32 can be expanded smoothly by sliding the extrusion tube making machine 20 to the pushing side (to the right in FIG. 13).

該拡張現象は、接続領域３２における発進側（図１３において左側）の部分から到達側（図１３において右側）の部分へ順次波及していく。接続領域３２の全域が拡張され、かつ中間領域３３Ｂには拡張が及んでいないとき、元押し製管機２０を停止させる。
接続領域３２の管軸方向の両側部分にはそれぞれテーパ部３４Ｂ，３４Ｃが形成される。中間領域３３Ｂは、拡張（拡径）されることなく、小周長部３ｂとなる。
なお、接続領域３２の全域を一工程で拡張させるのに代えて、接続領域３２からワイヤ４１を複数回に分けて段階的に巻き取り、一回あたりの巻き取った部分ごとに順次拡張させてもよい。 The expansion phenomenon sequentially spreads from the starting side (left side in FIG. 13) to the arrival side (right side in FIG. 13) in the connection area 32. When the entire area of the connection region 32 has been expanded and the expansion has not reached the intermediate region 33B, the extrusion pipe making machine 20 is stopped.
Tapered portions 34B and 34C are formed on both sides of the connection region 32 in the tube axis direction, respectively. The intermediate region 33B becomes the small circumference portion 3b without being expanded (diameter enlarged).
Note that instead of expanding the entire area of the connection area 32 in one step, the wire 41 is wound in stages from the connection area 32 in multiple steps, and each wound portion is expanded sequentially. Good too.

次に、図１４に示すように、ワイヤ巻取リール４３によって、ワイヤ４１を管軸方向に引っ張りながら、ほぼ全部を巻き取る。このとき、管部分３６における凸条１４ｃの根元部分が、ワイヤ４１の折り返し部４１ｃによって切断される（図８（ｂ）参照）。したがって、管部分３６の嵌合部１３，１４どうしの接合力が製管時よりも弱められる。更生管３Ｅ全体の凸条１４ｃが切断された状態になる。
元押し製管機２０は、ガイドレール２５に沿って押し込み側とは逆側（図１４において左側）の初期位置に戻しておく。 Next, as shown in FIG. 14, almost the entire wire 41 is wound up by the wire take-up reel 43 while being pulled in the tube axis direction. At this time, the root portion of the ridge 14c in the tube portion 36 is cut by the folded portion 41c of the wire 41 (see FIG. 8(b)). Therefore, the bonding force between the fitting portions 13 and 14 of the tube portion 36 is weakened compared to that during tube manufacturing. The ridges 14c of the entire rehabilitated pipe 3E are cut.
The extrusion pipe making machine 20 is returned to the initial position along the guide rail 25 on the opposite side to the pushing side (left side in FIG. 14).

次に、図１５に示すように、元押し製管機２０を再度駆動して、未製管帯部分１８を送り込むことによって、発進側管端領域３１を拡張方向へ捩じる。該捩じり力Ｆ_３１によって、発進側管端領域３１における嵌合部１３，１４どうしが巻き方向に沿って互いにずれるように滑り、発進側管端領域３１の周長が拡張される。拡張された発進側管端領域３１が、既設管１の内周面の全周にわたって押し当てられて拘束される。発進側管端領域３１のヘリカル形状は、拡張に伴ってリード角θ_３ａ及びピッチＰ_３ａが小さくなるように変化し、発進側管端領域３１の軸長が縮む。このとき、元押し製管機２０が押し込み側（図１５において右側）へスライドされることで、発進側管端領域３１を円滑に拡径させることができる。 Next, as shown in FIG. 15, the original tube making machine 20 is driven again to feed the unmade tube band portion 18, thereby twisting the starting side tube end region 31 in the expansion direction. Due to the torsional force _F31 , the fitting parts 13 and 14 in the starting side tube end region 31 slide so as to be shifted from each other along the winding direction, and the circumference of the starting side tube end region 31 is expanded. The expanded starting side tube end region 31 is pressed and restrained over the entire inner peripheral surface of the existing tube 1. The helical shape of the starting side tube end region 31 changes so that the lead angle θ _3a and the pitch P _3a become smaller as it expands, and the axial length of the starting side tube end region 31 decreases. At this time, the starting tube end region 31 can be smoothly expanded in diameter by sliding the extrusion tube making machine 20 to the pushing side (to the right in FIG. 15).

前記発進側管端領域３１の拡張現象は、更生管３の発進側の部分から到達側（図１５において右側）の部分へ順次波及していく。発進側管端領域３１の全域が拡張され、かつ中間領域３３Ａには拡張が及んでいないとき、元押し製管機２０を停止させる。
中間領域３３Ａは、小周長部３ｂのまま残される。拡張された発進側管端領域３１との中間領域３３Ａとの間には、テーパ部３４Ａが形成される。
なお、発進側管端領域３１の全域を一工程で拡張させるのに代えて、発進側管端領域３１からワイヤ４１を複数回に分けて段階的に巻き取り、一回あたりの巻き取った部分ごとに順次拡張させてもよい。 The expansion phenomenon of the starting side pipe end region 31 spreads sequentially from the starting side portion of the rehabilitated pipe 3 to the reaching side (right side in FIG. 15). When the entire area of the starting side tube end region 31 has been expanded and the expansion has not reached the intermediate region 33A, the extrusion tube making machine 20 is stopped.
The intermediate region 33A remains as the small circumference portion 3b. A tapered portion 34A is formed between the expanded starting side tube end region 31 and the intermediate region 33A.
Note that instead of expanding the entire area of the starting side tube end region 31 in one step, the wire 41 is wound in stages from the starting side tube end region 31 in multiple steps, and the portion wound per time is expanded. It may be expanded sequentially.

このようにして、更生済管１Ａが構築される。
更生済管１Ａによれば、更生管３における両側の端領域３１，３９及び中間の接続領域３２を大周長部３ａとして既設管１に拘束することによって、更生管３が既設管１に対して位置ずれを起こすのを防止できる。
図４及び図５に示すように、接続領域３２には連通口３２ｃを削孔し、連通口３２ｃを介して取付管２と更生管３とを連通させる。接続領域３２を大周長部３ａとして既設管１の内周面に密着させておくことによって、取付管２と更生管３との連通作業を容易化できる。
更生済管１Ａにおいては必要箇所だけを大周長部３ａとし、それ以外の箇所は小周長部３ｂとしている。小周長部３ｂは大周長部３ａよりも一周あたりの帯状部材１０の長さが短い。したがって、帯状部材１０の無駄を省くことができる。 In this way, the rehabilitated pipe 1A is constructed.
According to the rehabilitated pipe 1A, by restraining the rehabilitated pipe 3 to the existing pipe 1 by using the end regions 31, 39 on both sides and the intermediate connection region 32 as the large circumferential portion 3a, the position of the rehabilitated pipe 3 with respect to the existing pipe 1 can be adjusted. This can prevent misalignment.
As shown in FIGS. 4 and 5, a communication port 32c is drilled in the connection region 32, and the attachment pipe 2 and the rehabilitated pipe 3 are communicated through the communication port 32c. By bringing the connecting region 32 into close contact with the inner circumferential surface of the existing pipe 1 as the large circumferential portion 3a, communication work between the attached pipe 2 and the rehabilitated pipe 3 can be facilitated.
In the rehabilitated pipe 1A, only necessary portions are made into large circumferential portions 3a, and other portions are made into small circumferential portions 3b. The length of the belt-like member 10 per circumference of the small circumferential portion 3b is shorter than that of the large circumferential portion 3a. Therefore, waste of the strip member 10 can be avoided.

次に本発明の他の実施形態を説明する。以下の実施形態において既述の形態と重複する構成に関しては、図面に同一符号を付して説明を省略する。
帯状部材の断面形状は種々の態様を採用可能である。
＜第２実施形態＞
図１６に示す第２実施形態の帯状部材１０Ｂにおいては、帯状部材１０Ｂの平帯部１１が凸状の第２嵌合部１４よりも帯幅方向の外方へ延び出ることによって、延出部１１ｅが形成されている。延出部１１ｅに保持溝１１ｆが形成されている。平帯部１１における第１嵌合部１３側の部分は、外周側（図１６において上側）へ段差状に***され、***部分１１ｄとなっている。 Next, other embodiments of the present invention will be described. In the following embodiments, the same reference numerals are given to the same components in the drawings, and the explanation thereof will be omitted.
Various aspects can be adopted for the cross-sectional shape of the band-shaped member.
<Second embodiment>
In the band member 10B of the second embodiment shown in FIG. 16, the flat band portion 11 of the band member 10B extends outward in the band width direction beyond the convex second fitting portion 14, so that the extending portion 11e is formed. A holding groove 11f is formed in the extending portion 11e. A portion of the flat band portion 11 on the first fitting portion 13 side is raised in a stepped manner toward the outer periphery (upward in FIG. 16), forming a raised portion 11d.

図１７（ａ）に示すように、更生管３の製管時には、保持溝１１ｆにワイヤ４１が収容される。そして、第２嵌合部１４が一周違いに隣接する第１嵌合部１３に嵌合されるとともに、延出部１１ｅが***部分１１ｄに嵌る。しかも、延出部１１ｅにおける保持溝１１ｆより先端側部分と***部分１１ｄとの間には接着剤５１が設けられる。保持溝１１ｆより第２嵌合部１４側の部分と***部分１１ｄとの間には、滑り性のシール剤５２が設けられる。接着剤５１によって延出部１１ｅと***部分１１ｄが接着されることによって、安定的に製管できる。 As shown in FIG. 17(a), when manufacturing the rehabilitated pipe 3, the wire 41 is accommodated in the holding groove 11f. Then, the second fitting part 14 is fitted into the first fitting part 13 which is adjacent to the second fitting part 13 on the opposite rotation, and the extending part 11e is fitted into the raised part 11d. Furthermore, an adhesive 51 is provided between the portion of the extending portion 11e on the distal end side of the holding groove 11f and the raised portion 11d. A slippery sealant 52 is provided between the portion closer to the second fitting portion 14 than the holding groove 11f and the raised portion 11d. By bonding the extending portion 11e and the raised portion 11d with the adhesive 51, stable pipe production is possible.

図１７（ｂ）に示すように、製管後の拡張工程では、ワイヤ４１によって延出部１１ｅが保持溝１１ｆにおいて分断される。これによって、嵌合部１３，１４どうしが巻回方向に沿って互いにずれるように滑ることで大周長部３ａを形成できる。 As shown in FIG. 17(b), in the expansion step after pipe manufacturing, the extending portion 11e is separated by the wire 41 at the holding groove 11f. Thereby, the large circumference portion 3a can be formed by the fitting portions 13 and 14 sliding so as to be shifted from each other along the winding direction.

＜第３実施形態＞
図１８～図２１は、本発明の第３実施形態を示したものである。第３実施形態の帯状部材１０Ｃにおいては、帯幅方向（図１８において左右）の一方側（図１８において左側）の縁部に複数列の凹溝１３ａ及び凸条１３ｂを含む第１嵌合部１３Ｃが形成されている。帯状部材１０Ｃにおける帯幅方向の他方側（図１８において右側）の縁部には、複数列の凸条１４ａ及び凹溝１４ｂを含む第２嵌合部１４Ｃが形成されている。帯状部材１０Ｃにおける第１嵌合部１３Ｃ及び第２嵌合部１４Ｃの断面形状は互いに相補形状になっている。
図１９に示すように、帯状部材１０Ｃを螺旋状に巻回してなる更生管３においては、対応する凹溝１３ａと凸条１４ａどうしが嵌合されるとともに、対応する凸条１３ｂと凹溝１４ａどうしが嵌合されている。 <Third embodiment>
18 to 21 show a third embodiment of the present invention. In the band member 10C of the third embodiment, the first fitting portion includes a plurality of rows of grooves 13a and protrusions 13b at the edge on one side (left side in FIG. 18) in the band width direction (left and right in FIG. 18). 13C is formed. A second fitting portion 14C including a plurality of rows of protrusions 14a and grooves 14b is formed at the edge of the band member 10C on the other side in the band width direction (right side in FIG. 18). The cross-sectional shapes of the first fitting portion 13C and the second fitting portion 14C in the band member 10C are complementary to each other.
As shown in FIG. 19, in the rehabilitated pipe 3 formed by spirally winding the band member 10C, the corresponding grooves 13a and the grooves 14a are fitted together, and the corresponding grooves 13b and grooves 14a are fitted together. They are mated together.

図２０及び図２１に示すように、第３実施形態の製管工程においては、元押し式製管機２０に代えて、自走式の製管機２０Ｃが用いられている。製管機２０Ｃが既設管１の内周に沿って螺旋状に自走しながら、帯状部材１０Ｃから更生管３を形成する。 As shown in FIGS. 20 and 21, in the pipe making process of the third embodiment, a self-propelled pipe making machine 20C is used instead of the main push type pipe making machine 20. The pipe making machine 20C forms the rehabilitated pipe 3 from the strip member 10C while spirally running along the inner periphery of the existing pipe 1.

自走式の製管機２０Ｃは、本体フレーム２９と、駆動部２１と、ガイド２２，２３，２４を備えている。本体フレーム２９は、製管途中の更生管３の延伸方向の先端部（延伸端部３ｆ）における周方向の一箇所に配置される。本体フレーム２９の上部に駆動部２１が設けられている。駆動部２１は、一対の駆動ローラ２１ａを有している。
駆動ローラ２１ａによって、帯状部材１０Ｃにおける未製管の帯部分１８が、延伸端部３ｆへ向けて押し出されて更生管３に組み込まれる。このとき、推進反力が生じ、製管機２０Ｃが図２０において矢印ｃにて示す方向（図２１の時計回り）に推進（自走）される。 The self-propelled pipe making machine 20C includes a main body frame 29, a drive section 21, and guides 22, 23, and 24. The main body frame 29 is disposed at one location in the circumferential direction at the leading end (extending end 3f) of the rehabilitated pipe 3 in the extending direction during pipe manufacture. A driving section 21 is provided at the top of the main body frame 29. The drive section 21 has a pair of drive rollers 21a.
The band portion 18 of the unmade pipe in the band member 10C is pushed out toward the extended end portion 3f and incorporated into the rehabilitated pipe 3 by the drive roller 21a. At this time, a propulsive reaction force is generated, and the pipe making machine 20C is propelled (self-propelled) in the direction shown by arrow c in FIG. 20 (clockwise in FIG. 21).

本体フレーム２９の底部には、推進方向に互いに離れて複数のガイド２２，２３，２４が設けられている。これらガイド２２，２３，２４が、更生管３の延伸端部３ｆに対して前記推進方向へ摺動可能又は転動可能に係止されている。
ガイド２２の一対の摺動ガイド部材２２ａ，２２ｂによる更生管３に対する挟み付け力（推進抵抗力）を調節したり、製管機２０Ｃを推進方向に沿う軸線まわりに傾斜させたり、駆動部２１による押し込み力を調節したりすることで、更生管３の製管径を調整できる。これによって、製管と同時に大周長部３ａ及び小周長部３ｂを形成できる。 A plurality of guides 22, 23, and 24 are provided at the bottom of the main body frame 29 and spaced apart from each other in the propulsion direction. These guides 22, 23, and 24 are slidably or rollably locked to the extending end 3f of the rehabilitation pipe 3 in the propulsion direction.
The clamping force (propulsion resistance force) on the rehabilitated pipe 3 by the pair of sliding guide members 22a and 22b of the guide 22 can be adjusted, the pipe making machine 20C can be tilted around the axis along the propulsion direction, and the By adjusting the pushing force, the diameter of the rehabilitated pipe 3 can be adjusted. Thereby, the large circumferential portion 3a and the small circumferential portion 3b can be formed simultaneously with pipe manufacturing.

＜第４実施形態（帯状部材の変形態様）＞
図２２に示す第４実施形態の帯状部材１０Ｄにおいては、第３実施形態（図１８）と同じ断面形状の合成樹脂製の帯本体１９の外周側部（更生管３となったときに外周側を向く側部）に補強帯材１５が付設されている。補強帯材１５は、スチールなどの金属によって構成され、概略Ｍ字状の断面形状に形成されている。該補強部材１５が、帯本体１９の一対のリブ１２を跨いで挟み付けている。補強部材１５の斜めをなす両端部が、嵌合部１３Ｃ，１４Ｃから突出された係止突起１３ｈ，１４ｈに係止されている。補強帯材１５によって、帯状部材１０Ｄひいては更生管３の強度が高まる。 <Fourth embodiment (modified form of band-shaped member)>
In the band member 10D of the fourth embodiment shown in FIG. A reinforcing strip material 15 is attached to the side facing toward the direction. The reinforcing band material 15 is made of metal such as steel and has a generally M-shaped cross section. The reinforcing member 15 straddles and pinches the pair of ribs 12 of the band main body 19. Both oblique ends of the reinforcing member 15 are locked to locking protrusions 13h, 14h protruding from the fitting parts 13C, 14C. The reinforcing band material 15 increases the strength of the band member 10D and thus the rehabilitated pipe 3.

＜第５実施形態（帯状部材の変形態様）＞
図２３に示す第５実施形態の帯状部材１０Ｅにおいては、合成樹脂製の帯本体１９に伸縮可能部１６が設けられている。伸縮可能部１６は、ベローズ１６ａと、易切断部１６ｂとを含む。
当該帯状部材１０Ｅによって構築された更生管３においては、地震動が起きたとき、易切断部１６ｂが切断されて、ベローズ１６ａが帯幅方向（図２３において左右方向）に伸縮変形でき、更には更生管３が伸縮できる。これによって、地震動のエネルギーを吸収できるとともに、嵌合部１３Ｃ，１４Ｃどうしの嵌合状態を保持することで、更生管３の水密性が保たれる。
好ましくは、更生管３の大周長部３ａ及び小周長部３ｂのうち小周長部３ｂだけが伸縮可能である。大周長部３ａは既設管１に拘束されることで伸縮されることがない。
なお、帯状部材１０Ｅにおいて、補強帯材１５を省略してもよい。
大周長部３ａ及び小周長部３ｂのうち小周長部３ｂを構成する帯状部材１０Ｅだけが、伸縮可能部１６を有していてもよい。大周長部３ａにおける帯状部材は、伸縮可能部１６を有していなくてもよい。 <Fifth embodiment (modified form of band-shaped member)>
In a belt-like member 10E of the fifth embodiment shown in FIG. 23, a stretchable portion 16 is provided in a belt main body 19 made of synthetic resin. The extensible portion 16 includes a bellows 16a and an easily cut portion 16b.
In the rehabilitated pipe 3 constructed by the strip member 10E, when an earthquake occurs, the easy-to-cut portion 16b is cut, the bellows 16a can expand and contract in the strip width direction (horizontal direction in FIG. 23), and the rehabilitation The tube 3 can be expanded and contracted. Thereby, the energy of the earthquake motion can be absorbed, and the watertightness of the rehabilitated pipe 3 is maintained by maintaining the fitted state between the fitting parts 13C and 14C.
Preferably, of the large circumferential portion 3a and the small circumferential portion 3b of the rehabilitated pipe 3, only the small circumferential portion 3b is expandable and contractible. The large circumferential portion 3a is restrained by the existing pipe 1 and is not expanded or contracted.
Note that the reinforcing band material 15 may be omitted in the band member 10E.
Of the large circumferential portion 3a and the small circumferential portion 3b, only the band-like member 10E forming the small circumferential portion 3b may have the expandable/contractable portion 16. The band-like member in the large circumferential portion 3a does not need to have the expandable/contractable portion 16.

＜第６実施形態（帯状部材の変形態様）＞
図２４に示す帯状部材１０Ｆにおいては、合成樹脂製の帯本体１９Ｆの平帯部１１における帯幅方向の一方側（図２４において左側）の縁部に、凹溝状の第１嵌合部１３Ｆが形成されている。該第１嵌合部１３Ｆから斜め外側へサブロック片１７が延びている。平帯部１１における帯幅方向の他方側（図２４において右側）の縁部には、凸状の第２嵌合部１４Ｆが形成されている。
なお、帯状部材１０Ｆにおいて、補強帯材１５を省略してもよい。 <Sixth embodiment (modified form of band-shaped member)>
In the band member 10F shown in FIG. 24, a groove-shaped first fitting portion 13F is provided at the edge of one side (left side in FIG. 24) in the band width direction of the flat band portion 11 of the band main body 19F made of synthetic resin. is formed. A sub-lock piece 17 extends diagonally outward from the first fitting portion 13F. A convex second fitting portion 14F is formed at the edge of the flat band portion 11 on the other side (right side in FIG. 24) in the band width direction.
Note that the reinforcing strip material 15 may be omitted in the strip member 10F.

図２５に示すように、帯状部材１０Ｆからなる更生管３においては、螺旋状をなす帯状部材１０Ｆにおける一周違いに隣接する嵌合部１３Ｆ，１４Ｆどうしが嵌合されるとともに、サブロック片１７の先端部が、一周違いに隣接するリブ１２の先端の係止突起１２ｆに係止されている。 As shown in FIG. 25, in the rehabilitated pipe 3 made of the strip member 10F, the fitting portions 13F and 14F that are adjacent to each other at different turns in the spiral strip member 10F are fitted together, and the sub-lock pieces 17 are fitted together. The tip portion is locked to a locking protrusion 12f at the tip of the rib 12 that is adjacent to the rib 12 one round apart.

本発明は、前記実施形態に限定されるものではなく、その趣旨を逸脱しない範囲において種々の改変をなすことができる。
例えば、更生管３の大周長部３ａと既設管１の内周面との間には、シリコーン、モルタル、セメントミルク、エポキシ系接着剤、アクリル系接着剤、ホットメルト接着剤等の裏込め材を充填してもよい。大周長部３ａが、裏込め材を介して既設管１と接着されることで拘束されてもよい。更生管３の製管後に裏込め材を注入してもよく、製管前の帯状部材における大周長部３ａとなる部分の外周部に裏込め材を予め配置しておいてもよい。帯状部材における大周長部３ａとなる部分に注入孔付きの注入チューブを設けておき、製管後に注入孔から裏込め材を大周長部３ａと既設管１との間に注入してもよい。
大周長部３ａを既設管１に対して拘束する拘束手段として、アンカーボルトを大周長部３ａの内周側から既設管１に打ち込んでもよい。
第１実施形態等の製管工程においては、到達人孔４Ｂに製管機２０を設置して、拡張工程を行ってもよい。
製管機２０によらずに人力で更生管を捩じって拡張させてもよい。
エアパッカーなどの膨張体を大周長部３ａとなる部分の内部に配置して、前記膨張体を膨張させることによって、大周長部３ａを拡張させてもよい。
更生管３が、複数条の帯状部材（例えば主帯体（ストリップ）と副帯体（ジョイナー））から構成されていてもよい。螺旋状に巻回された主帯体における一周違いに隣接する縁部どうしが、螺旋状に巻回された副帯体を介して接続されていてもよい。 The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit thereof.
For example, a backfilling material such as silicone, mortar, cement milk, epoxy adhesive, acrylic adhesive, hot melt adhesive, etc. is applied between the large circumferential portion 3a of the rehabilitated pipe 3 and the inner peripheral surface of the existing pipe 1. May be filled. The large circumferential portion 3a may be restrained by being bonded to the existing pipe 1 via a backfilling material. The backfilling material may be injected after the rehabilitation pipe 3 is manufactured, or the backfilling material may be placed in advance on the outer periphery of the portion that will become the large circumferential portion 3a of the belt-shaped member before the pipe is manufactured. An injection tube with an injection hole may be provided in a portion of the band-shaped member that will become the large circumference portion 3a, and a backfilling material may be injected between the large circumference portion 3a and the existing pipe 1 through the injection hole after pipe manufacturing.
An anchor bolt may be driven into the existing pipe 1 from the inner peripheral side of the large circumferential portion 3a as a restraining means for restraining the large circumferential portion 3a with respect to the existing pipe 1.
In the pipe manufacturing process of the first embodiment, etc., the pipe manufacturing machine 20 may be installed in the reaching manhole 4B and the expansion process may be performed.
The rehabilitated pipe may be expanded by twisting it manually without using the pipe making machine 20.
The large circumferential portion 3a may be expanded by disposing an inflatable body such as an air packer inside the portion that will become the large circumferential portion 3a and inflating the expandable body.
The rehabilitation pipe 3 may be composed of a plurality of strip members (for example, a main strip (strip) and a sub strip (joiner)). Edges of the spirally wound main band may be connected to each other via a spirally wound subband.

本発明は、例えば老朽化した下水道管の更生技術に適用できる。 The present invention can be applied, for example, to rehabilitation technology for aging sewer pipes.

１Ａ更生済管（既設管更生構造）
１既設管
２取付管（枝管）
３更生管
３ａ大周長部
３ｂ小周長部
３ｅ到達側端部（更生管の反対側の端部）
１０帯状部材
１０Ｂ～１０Ｆ帯状部材
１３第１嵌合部
１３Ｃ，１３Ｆ第１嵌合部
１４第２嵌合部
１４Ｃ，１４Ｆ第２嵌合部
２０元押し式製管機
２０Ｃ自走式製管機
３１発進側管端領域（既設管の端部に設けられた部分、大周長部）
３２接続領域（既設管の枝管との接続部に設けられた部分、大周長部）
３３Ａ，３３Ｂ中間領域（小周長部）
３５，３６一端側の管部分
３９到達側管端領域（既設管の端部に設けられた部分、大周長部）
４１ワイヤ４１（線状部材） 1A Rehabilitated pipe (existing pipe rehabilitation structure)
1 Existing pipe 2 Attached pipe (branch pipe)
3 Rehabilitation pipe 3a Large circumference portion 3b Small circumference portion 3e Reach side end (end on the opposite side of rehabilitation pipe)
10 Band-shaped members 10B to 10F Band-shaped member 13 First fitting parts 13C, 13F First fitting part 14 Second fitting parts 14C, 14F Second fitting part 20 Push-type pipe making machine 20C Self-propelled pipe making machine 31 Starting side pipe end area (part provided at the end of the existing pipe, large circumference part)
32 Connection area (part provided at the connection part of the existing pipe with the branch pipe, large circumference part)
33A, 33B Intermediate area (small circumference part)
35, 36 Pipe portion on one end side 39 Reach side pipe end region (portion provided at the end of the existing pipe, large circumference portion)
41 Wire 41 (linear member)

Claims

既設管の内周に沿う螺旋管状の更生管を備え、前記更生管が、螺旋状に巻回されて帯幅方向の両縁部の互いに一周ずれて隣接する縁部分どうしが接合された帯状部材によって構成された既設管更生構造であって、
前記更生管には、周長が相対的に大きい大周長部と、周長が相対的に小さい小周長部とが管軸方向に並んで設けられており、
前記大周長部が、前記小周長部よりも周方向の広範囲又は多数箇所において前記既設管の内周面と接しており、
前記更生管における前記既設管の端部に設けられた管端領域及び前記更生管における前記既設管の枝管との接続部に設けられた接続領域が、それぞれ前記大周長部となり、前記更生管における前記管端領域と前記接続領域との間の中間領域が前記小周長部となっていることを特徴とする既設管更生構造。 A band-like member comprising a spiral rehabilitation pipe along the inner periphery of an existing pipe, the rehabilitation pipe being spirally wound and adjacent edge portions of both edges in the band width direction shifted one round from each other being joined to each other. An existing pipe rehabilitation structure composed of
The rehabilitated pipe is provided with a large circumferential portion having a relatively large circumferential length and a small circumferential portion having a relatively small circumferential length aligned in the pipe axis direction,
The large circumferential portion is in contact with the inner circumferential surface of the existing pipe at a wider range or in multiple locations in the circumferential direction than the small circumferential portion,
A pipe end region provided at the end of the existing pipe in the rehabilitated pipe and a connection region provided at the connection portion of the rehabilitated pipe with a branch pipe of the existing pipe respectively become the large circumferential length portion, and An existing pipe rehabilitation structure characterized in that an intermediate region between the pipe end region and the connection region is the small circumference portion.

前記大周長部の外周長が、前記既設管の内周長と実質等大であり、前記小周長部の外周長が、前記既設管の内周長より小さいことを特徴とする請求項１に記載の既設管更生構造。 The outer circumferential length of the large circumferential portion is substantially equal to the inner circumferential length of the existing pipe, and the outer circumferential length of the small circumferential portion is smaller than the inner circumferential length of the existing pipe. Existing pipe rehabilitation structure.

前記更生管には前記接続領域が１つだけ設けられており、前記更生管の管軸方向において前記管端領域及び前記接続領域が占める長さが、前記中間領域が占める長さより短いことを特徴とする請求項１又は２に記載の既設管更生構造。 The rehabilitation pipe is provided with only one connection area, and the length occupied by the pipe end area and the connection area in the axial direction of the rehabilitation pipe is shorter than the length occupied by the intermediate area. The existing pipe rehabilitation structure according to claim 1 or 2.

既設管を螺旋管状の更生管によって更生する方法であって、
帯状部材を前記既設管の内周に沿って螺旋状に巻回して、前記帯状部材の帯幅方向の両縁部の互いに一周ずれて隣接する縁部分どうしを接合することによって前記更生管を製管する製管工程と、
前記更生管には周長が相対的に大きい大周長部と、周長が相対的に小さい小周長部とを管軸方向に並べて形成する工程と、
前記大周長部を、前記小周長部よりも周方向の広範囲又は多数箇所において前記既設管の内周面と接触させる工程と、を備え、
前記製管工程では、前記大周長部とすべき部分を前記小周長部とすべき部分と同じ周長となるよう製管し、
前記製管後、前記更生管の管軸方向の一端側とは反対側の端部から前記一端側へ向けて順次、前記隣接する縁部分どうしの接合力を前記製管時より弱化させ、
前記小周長部とすべき部分における前記接合力を弱化させるときは周長を拡張させる操作を行なうことなく、
前記更生管の管軸方向の中間又は前記一端の大周長部とすべき部分まで前記接合力の弱化が進んだとき、前記更生管における前記一端側の管部分を捩じることによって、前記中間又は前記一端の大周長部とすべき部分の周長を拡張させ、
前記中間又は前記一端の大周長部とすべき部分の全体の周長が拡張され、かつ前記中間又は前記一端の大周長部とすべき部分より前記反対側の部分までは拡張が及んでいない時点で前記捩じりを停止することによって、前記中間又は前記一端の大周長部を形成するとともに前記反対側の部分を前記小周長部とすることを特徴とする既設管更生方法。 A method of rehabilitating an existing pipe using a spiral-shaped rehabilitation pipe, the method comprising:
The rehabilitated pipe is manufactured by winding a band-shaped member in a spiral along the inner circumference of the existing pipe, and joining adjacent edge portions of both edges in the band width direction of the band-shaped member shifted one turn from each other. pipe manufacturing process,
forming a large circumferential portion having a relatively large circumference and a small circumferential portion having a relatively small circumferential length in the rehabilitated pipe by arranging them in the pipe axis direction;
a step of bringing the large circumferential portion into contact with the inner circumferential surface of the existing pipe in a wider area or in a larger number of locations in the circumferential direction than the small circumferential portion;
In the pipe manufacturing step, the pipe is manufactured so that the portion to be the large circumference portion has the same circumference as the portion to be the small circumference portion,
After the pipe manufacturing, the joining force between the adjacent edge portions is gradually weakened from the time of pipe manufacturing from the end opposite to the one end in the pipe axis direction of the rehabilitated pipe toward the one end,
When weakening the bonding force in the portion that should be the small circumference portion, without performing an operation to expand the circumference,
When the weakening of the joining force has progressed to a portion that should be the large circumferential portion of the middle or one end of the rehabilitated pipe in the pipe axis direction, by twisting the pipe portion on the one end side of the rehabilitated pipe, the intermediate or Expanding the circumference of the portion that should be the large circumference portion of the one end,
At the point in time when the entire circumference of the portion that should be the large circumferential portion of the intermediate or one end is expanded, and the expansion has not reached the portion on the opposite side of the portion that should be the large circumferential portion of the intermediate or one end, A method for rehabilitating an existing pipe, characterized in that by stopping twisting, a large circumferential portion is formed at the middle or one end, and a portion on the opposite side is made into the small circumferential portion.

前記中間又は前記一端の大周長部とすべき部分の全体の前記接合力を弱化させてから前記弱化の操作を停止し、前記停止した状態で前記捩じりを行なうことによって、前記中間又は前記一端の大周長部とすべき部分の周長を、前記弱化の進行方向とは逆の前記一端側から前記反対側へ漸次拡張させることを特徴とする請求項４に記載の既設管更生方法。 By weakening the joining force of the entire portion that should be the large circumferential portion of the intermediate or one end, stopping the weakening operation, and performing the twisting in the stopped state, the intermediate or one end is 5. The method for rehabilitating an existing pipe according to claim 4, wherein the circumferential length of the portion that should be the large circumferential length portion of the pipe is gradually expanded from the one end side opposite to the direction in which the weakening progresses toward the opposite side.

前記隣接する縁部分どうしを互いの間に線状部材が挟み込まれるように凹凸嵌合させながら前記製管を行ない、その後、前記更生管の前記反対側の端部から前記一端側へ向けて順次、前記線状部材を引き抜くことにより前記弱化を行なうことを特徴とする請求項４又は５に記載の既設管更生方法。 The pipe manufacturing is performed while fitting the adjacent edge portions in a convex-concave manner so that the linear member is sandwiched between them, and then sequentially from the opposite end of the rehabilitated pipe toward the one end. 6. The method for rehabilitating an existing pipe according to claim 4, wherein the weakening is performed by pulling out the linear member.