JP2018052014A - Belt-like member for forming spiral tube - Google Patents

Belt-like member for forming spiral tube Download PDF

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JP2018052014A
JP2018052014A JP2016192618A JP2016192618A JP2018052014A JP 2018052014 A JP2018052014 A JP 2018052014A JP 2016192618 A JP2016192618 A JP 2016192618A JP 2016192618 A JP2016192618 A JP 2016192618A JP 2018052014 A JP2018052014 A JP 2018052014A
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deformation
belt
spiral tube
holding member
expansion
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JP6783611B2 (en
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佳郎 杉山
Yoshiro Sugiyama
佳郎 杉山
政浩 山崎
Masahiro Yamazaki
政浩 山崎
克則 吉野
Katsunori Yoshino
克則 吉野
順一 長束
Junichi Nagatsuka
順一 長束
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Sekisui Chemical Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a belt-like member having a flexible part, with which deformation of the flexible part can be kept without using an extra step and no deterioration in the property of the belt-like member is caused.SOLUTION: A belt-like member 2 forms a spiral tube by being wound in a spiral form to be formed into a tubular shape. A main body 21 has a flexible part 214 formed by being bent to be projected toward a back face side. A deformation keeping member 22 can be plastic-deformed along with the flexible part 214 when an external force is applied to the flexible part 214 to cause elastic deformation thereof and can keep the deformation caused in the flexible part 214 after the external force is eliminated.SELECTED DRAWING: Figure 2

Description

本発明は、老朽化した既設管を更生する際に使用される螺旋管形成用帯状部材に関する。   The present invention relates to a strip-shaped member for forming a spiral tube used when rehabilitating an aged existing tube.

上水道や下水道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。   Metal pipes and fume pipes have long been used for existing pipes used as waterworks and sewers. 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.

既設管のライニング工法の一つに合成樹脂製の帯状部材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部材を螺旋状に巻回して、螺旋状に巻回された帯状部材の隣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造し、製造された螺旋管を既設管内に挿入することにより既設管内面を螺旋管によってライニングするようになっている。   As one of existing pipe lining methods, a method of lining an existing pipe with a spiral pipe formed by spirally winding a strip member made of synthetic resin is known. In this method, a spiral tube is manufactured by winding a strip-shaped member for existing pipe lining in a spiral shape, and bringing adjacent side edges of the spirally wound strip-shaped member into an engaged state. By inserting the formed helical tube into the existing tube, the inner surface of the existing tube is lined by the helical tube.

上記帯状部材では、形成される螺旋管が軸方向に伸長しやすくなるように山形状の伸縮部を設けたものがある（特許文献１）。このように帯状部材に伸縮部を設けることで、地震時における外力を吸収して螺旋管の破損を防止したり、既設管の湾曲部において帯状部材の幅方向に作用する大きな引張力を吸収したりすることが可能となる。   Some of the band-shaped members are provided with a mountain-shaped expansion / contraction part so that the formed helical tube can easily extend in the axial direction (Patent Document 1). By providing the belt-shaped member with the expansion / contraction part in this manner, the external force during the earthquake is absorbed to prevent the spiral tube from being damaged, or the large tensile force acting in the width direction of the belt-shaped member is absorbed at the curved part of the existing pipe. It becomes possible to do.

また、特許文献２には、熱可塑性樹脂を用いて形成された帯状部材に伸縮部を設け、螺旋管の製管時に伸縮部を変形させる時には、伸縮部に対して加熱処理を施して変形させる製管方法が記載されている。   Further, in Patent Document 2, when a stretchable portion is provided on a belt-shaped member formed using a thermoplastic resin, and the stretchable portion is deformed when the spiral tube is manufactured, the stretchable portion is subjected to heat treatment to be deformed. A pipe making method is described.

特開平１１−０３４１６５号公報Japanese Patent Laid-Open No. 11-034165 国際公開第２００８／０５０７５０号International Publication No. 2008/050750

しかしながら、特許文献１に記載のような、単に伸縮部を設けただけの帯状部材では、伸縮部の変形が弾性変形域である場合には、与えられた伸長量を保持することが困難である。例えば、螺旋管を既設管の湾曲部に沿わせるように製管する時には、それまでに製管された螺旋管の端部に管軸方向の引張力を与えることで、帯状部材に設けられた伸縮部を管軸方向に伸長させる。この場合、与えられた伸長量を保持することができなければ、引張力を与え続けながら製管を行う必要があり、製管時の作業効率が低下する。また、伸縮部に弾性変形域を超える伸長量を与えた場合には、帯状部材の白化といった性質の低下を引き起こすおそれがある。   However, in the belt-like member simply provided with the expansion / contraction part as described in Patent Document 1, it is difficult to maintain the given extension amount when the deformation of the expansion / contraction part is an elastic deformation region. . For example, when the spiral tube is manufactured so as to be along the curved portion of the existing tube, it is provided on the belt-shaped member by applying a tensile force in the tube axis direction to the end portion of the spiral tube manufactured so far. Extend the telescopic part in the tube axis direction. In this case, if the given amount of elongation cannot be maintained, it is necessary to make a pipe while continuing to apply a tensile force, and work efficiency during pipe making is reduced. Moreover, when the expansion | extension amount which exceeds an elastic deformation area is given to an expansion-contraction part, there exists a possibility of causing the fall of the property of whitening of a strip | belt-shaped member.

また、特許文献２に開示された製管方法では、伸縮部に加熱を行って変形させるため、温度が下がるとその変形量は保持され、弾性変形域を超えて伸長させる場合のような大きな性質の低下も生じない。しかしながら、加熱工程が必要となるため、施工工程の増加が生じるといった問題がある。また、製管される螺旋管が水などの冷媒に接触している状況では加熱が困難であったり、加熱により危険を伴う雰囲気であったりする場合には、有効な手段ではなくなる。   Moreover, in the pipe making method disclosed in Patent Document 2, since the expansion / contraction part is heated to be deformed, the deformation amount is maintained when the temperature is lowered, and the large property as in the case of extending beyond the elastic deformation range. There will be no decrease in However, since a heating process is required, there is a problem that an increase in the construction process occurs. In addition, when the spiral tube to be manufactured is in contact with a coolant such as water, it is not an effective means when heating is difficult or the atmosphere is dangerous due to heating.

本発明は、上記課題に鑑みてなされたものであり、伸縮部を有する帯状部材において、余分な工程を用いることなく伸縮部の変形を保持でき、かつ、帯状部材の性質の低下を引き起こすことのない帯状部材を提供することを目的とする。   The present invention has been made in view of the above problems, and in a belt-shaped member having a stretchable part, the deformation of the stretchable part can be maintained without using an extra step, and the property of the belt-shaped member can be deteriorated. An object is to provide a strip-shaped member that does not.

本発明の螺旋管形成用帯状部材は、上記の課題を解決するために、螺旋状に巻回されて螺旋管を形成する螺旋管形成用帯状部材であって、前記螺旋管の内周面となる平板部を有する帯状部材本体と、弾性変形により当該螺旋管形成用帯状部材の幅方向に伸長または圧縮が可能な伸縮部と、前記伸縮部に外力が加えられて弾性変形が生じたときに前記伸縮部と共に塑性変形し、前記外力が除かれた後に前記伸縮部に生じた変形を保持する変形保持部材とを有することを特徴としている。   In order to solve the above problems, a spiral tube forming strip member of the present invention is a spiral tube forming strip member that is spirally wound to form a spiral tube, A belt-shaped member body having a flat plate portion, a stretchable portion that can be expanded or compressed in the width direction of the spiral tube-forming strip-shaped member by elastic deformation, and when an external force is applied to the stretchable portion to cause elastic deformation It has a deformation holding member that plastically deforms together with the expansion and contraction part and holds the deformation generated in the expansion and contraction part after the external force is removed.

上記の構成によれば螺旋管形成用帯状部材が伸縮部を有していることにより、伸縮部に外力を加えることで幅方向に伸長や収縮の変形を容易に与えることができる。また、伸縮部に変形が生じるときには、同時に変形保持部材にも変形が生じる。この時、伸縮部に生じる変形は弾性変形であるが、変形保持部材に生じる変形は塑性変形であるため、外力を取り除いても変形保持部材に生じた変形は維持され、伸縮部に生じた変形も変形保持部材によって保持することができる。   According to said structure, when the strip | belt-shaped member for spiral tube formation has an expansion-contraction part, the deformation | transformation of expansion | extension or shrinkage | contraction can be easily given to the width direction by applying external force to an expansion-contraction part. Further, when the expansion / contraction part is deformed, the deformation holding member is also deformed at the same time. At this time, the deformation generated in the expansion / contraction part is elastic deformation, but the deformation generated in the deformation holding member is plastic deformation, so the deformation generated in the deformation holding member is maintained even if the external force is removed, and the deformation generated in the expansion / contraction part. Can also be held by the deformation holding member.

伸縮部に生じる変形は弾性変形であるため、伸縮部において白化等の性質の低下は生じない。また、変形保持部材は外力を加えるだけで塑性変形するものであり、変形の際に加熱工程等の他の工程を必要としない。したがって、施工工程の増加が生じることもなく、また、施工現場の環境等によって施工が困難になることも生じにくい。   Since the deformation generated in the stretchable part is an elastic deformation, the property such as whitening does not deteriorate in the stretchable part. Further, the deformation holding member is plastically deformed only by applying an external force, and does not require other processes such as a heating process in the deformation. Therefore, there is no increase in the construction process, and it is difficult for the construction to be difficult due to the environment of the construction site.

本発明の他の螺旋管形成用帯状部材は、上記の課題を解決するために、螺旋状に巻回されて螺旋管を形成する螺旋管形成用帯状部材であって、前記螺旋管の内周面となる平板部を有する帯状部材本体と、弾性変形により当該螺旋管形成用帯状部材の幅方向に伸長または圧縮が可能な伸縮部と、前記帯状部材本体に比べて弾性範囲が小さい材料からなり、前記伸縮部を跨ぐように配置され、その両端部が前記伸縮部の両側で前記帯状部材本体に対して固定される変形保持部材とを有することを特徴としている。   In order to solve the above-mentioned problem, another spiral tube forming strip member of the present invention is a spiral tube forming strip member that is spirally wound to form a spiral tube, and the inner periphery of the spiral tube The belt-shaped member main body having a flat plate portion to be a surface, a stretchable portion that can be expanded or compressed in the width direction of the spiral tube-forming belt-shaped member by elastic deformation, and a material having a smaller elastic range than the belt-shaped member main body. The deformation holding member is disposed so as to straddle the stretchable portion, and both end portions thereof are fixed to the belt-like member main body on both sides of the stretchable portion.

上記の構成によれば、螺旋管形成用帯状部材が伸縮部を有していることにより、伸縮部に外力を加えることで幅方向に伸長や収縮の変形を容易に与えることができる。また、変形保持部材は、伸縮部を跨ぐように配置され、その両端部が伸縮部の両側で帯状部材本体に対して固定される。これにより、伸縮部において幅方向に伸長や収縮が生じた場合、その伸長量および収縮量を変形保持部材によって保持することが可能となる。   According to said structure, since the strip | belt-shaped member for spiral tube formation has an expansion-contraction part, the deformation | transformation of expansion | extension or shrinkage | contraction can be easily given to the width direction by applying external force to an expansion-contraction part. Moreover, a deformation | transformation holding member is arrange | positioned so that an expansion-contraction part may be straddled, and the both ends are fixed with respect to a strip | belt-shaped member main body at the both sides of an expansion-contraction part. Thereby, when expansion | extension and shrinkage | contraction arise in the width direction in the expansion-contraction part, it becomes possible to hold | maintain the expansion amount and shrinkage | contraction amount with a deformation | transformation holding member.

また、上記螺旋管形成用帯状部材では、前記帯状部材本体は、前記伸縮部の両側に本体側係合部を有しており、前記変形保持部材は、その両端部に保持部材側係合部を有しており、前記変形保持部材は、前記本体側係合部との前記保持部材側係合部との係合によって、前記帯状部材本体に対して固定される構成とすることができる。   Further, in the above-mentioned spiral tube forming strip member, the strip member main body has a body side engaging portion on both sides of the telescopic portion, and the deformation holding member has a holding member side engaging portion at both ends thereof. The deformation holding member can be fixed to the belt-like member main body by engagement with the main body side engaging portion and the holding member side engaging portion.

本発明のさらに他の螺旋管形成用帯状部材は、上記の課題を解決するために、螺旋状に巻回されて螺旋管を形成する螺旋管形成用帯状部材であって、前記螺旋管の内周面となる平板部を有する帯状部材本体と、弾性変形により当該螺旋管形成用帯状部材の幅方向に伸長または圧縮が可能な伸縮部と、前記帯状部材本体に比べて弾性範囲が小さい材料からなり、前記伸縮部の少なくとも一部に接着もしくは内包される変形保持部材とを有することを特徴としている。   In order to solve the above-described problem, another spiral tube forming strip member according to the present invention is a spiral tube forming strip member that is spirally wound to form a spiral tube, and includes an inside of the spiral tube. From a band-shaped member body having a flat plate portion as a peripheral surface, a stretchable portion that can be expanded or compressed in the width direction of the spiral tube-forming band-shaped member by elastic deformation, and a material having a smaller elastic range than the band-shaped member body And a deformation holding member that is adhered or included in at least a part of the expansion / contraction part.

上記の構成によれば、螺旋管形成用帯状部材が伸縮部を有していることにより、伸縮部に外力を加えることで幅方向に伸長や収縮の変形を容易に与えることができる。また、変形保持部材は、伸縮部の少なくとも一部に接着もしくは内包されて配置される。これにより、伸縮部において幅方向に伸長や収縮が生じた場合、その伸長量および収縮量を変形保持部材によって保持することが可能となる。   According to said structure, since the strip | belt-shaped member for spiral tube formation has an expansion-contraction part, the deformation | transformation of expansion | extension or shrinkage | contraction can be easily given to the width direction by applying external force to an expansion-contraction part. Further, the deformation holding member is disposed by being bonded or included in at least a part of the stretchable portion. Thereby, when expansion | extension and shrinkage | contraction arise in the width direction in the expansion-contraction part, it becomes possible to hold | maintain the expansion amount and shrinkage | contraction amount with a deformation | transformation holding member.

また、上記螺旋管形成用帯状部材では、前記伸縮部は、前記帯状部材本体の一部として形成されている構成とすることができる。   Moreover, in the said strip | belt-shaped member for spiral tube formation, the said expansion-contraction part can be set as the structure currently formed as a part of said strip | belt-shaped member main body.

また、上記螺旋管形成用帯状部材では、前記帯状部材本体が複数に分離して設けられており、前記伸縮部は、分離された前記帯状部材本体の間に配置されている構成とすることができる。この場合、伸縮部が帯状部材本体とは異なるよりヤング率が小さい素材（例えばゴム）でできているものが好ましい。   Moreover, in the said strip | belt-shaped member for spiral tube formation, it is set as the structure by which the said strip | belt-shaped member main body is separately provided in plurality, and the said expansion-contraction part is arrange | positioned between the separated said strip-shaped member main bodies. it can. In this case, it is preferable that the stretchable portion is made of a material (for example, rubber) having a smaller Young's modulus than the belt-shaped member body.

また、上記螺旋管形成用帯状部材では、前記伸縮部は、前記螺旋管の外周面となる側を前記螺旋管形成用帯状部材の背面とするとき、前記背面側に突出するように屈曲して形成されている構成とすることができる。   In the spiral tube forming belt-like member, the expansion and contraction portion is bent so as to protrude toward the back surface when the outer circumferential surface of the spiral tube is the back surface of the spiral tube forming belt member. It can be set as the formed structure.

本発明の螺旋管形成用帯状部材は、伸縮部に外力を加えることで幅方向の伸長や収縮変形を生じさせたとき、外力を取り除いた後も伸縮部に生じた変形を変形保持部材によって保持することができる。この時、伸縮部に生じる変形は弾性変形であるため、伸縮部において白化等の性質の低下を防止することができるといった効果を奏する。また、変形保持部材は外力を加えるだけで塑性変形するものであり、施工工程の増加が生じることもなく、また、施工現場の環境等によって施工が困難になることも生じにくいといった効果を奏する。   The strip-shaped member for forming a spiral tube of the present invention retains the deformation generated in the expansion / contraction portion even after the external force is removed by applying the external force to the expansion / contraction portion to cause the expansion or contraction deformation in the width direction. can do. At this time, since the deformation generated in the stretchable part is an elastic deformation, it is possible to prevent deterioration of properties such as whitening in the stretchable part. Further, the deformation holding member is plastically deformed only by applying an external force, and there is an effect that the construction process is not increased and the construction is difficult to be performed depending on the environment of the construction site.

本発明の実施形態における既設管の更生工法の一例を示す説明図である。It is explanatory drawing which shows an example of the rehabilitation method of the existing pipe | tube in embodiment of this invention. 実施の形態１に示す帯状部材の断面図であり、（ａ）は伸縮部が伸長されていない状態を示す図、（ｂ）は伸縮部が伸長された状態を示す図である。It is sectional drawing of the strip | belt-shaped member shown in Embodiment 1, (a) is a figure which shows the state by which the expansion-contraction part is not expand | extended, (b) is a figure which shows the state by which the expansion-contraction part was expand | extended. 実施の形態１に示す帯状部材の変形例を示す断面図である。FIG. 6 is a cross-sectional view showing a modification of the belt-like member shown in the first embodiment. 実施の形態１に示す帯状部材の他の変形例を示す断面図である。6 is a cross-sectional view showing another modification of the belt-like member shown in Embodiment 1. FIG. 実施の形態２に示す帯状部材の断面図であり、（ａ）は伸縮部が伸長されていない状態を示す図、（ｂ）は伸縮部が伸長された状態を示す図である。It is sectional drawing of the strip | belt-shaped member shown in Embodiment 2, (a) is a figure which shows the state by which the expansion-contraction part is not expand | extended, (b) is a figure which shows the state by which the expansion-contraction part was expand | extended. （ａ）〜（ｃ）は、実施の形態２に示す帯状部材の変形例を示す断面図である。(A)-(c) is sectional drawing which shows the modification of the strip | belt-shaped member shown in Embodiment 2. FIG. （ａ）〜（ｃ）は、図６（ａ）〜（ｃ）のそれぞれにおいて伸縮部が伸長された状態を示す断面図である。(A)-(c) is sectional drawing which shows the state by which the expansion-contraction part was expand | extended in each of FIG.6 (a)-(c). （ａ）〜（ｄ）は、実施の形態２に示す帯状部材の他の変形例を示す断面図である。(A)-(d) is sectional drawing which shows the other modification of the strip | belt-shaped member shown in Embodiment 2. FIG. 実施の形態３に示すストリップの断面図である。6 is a cross-sectional view of a strip shown in Embodiment 3. FIG. 実施の形態３に示すジョイナーの断面図である。6 is a cross-sectional view of a joiner shown in Embodiment 3. FIG. 実施の形態３に示すジョイナーの変形例を示す断面図である。FIG. 10 is a cross-sectional view showing a modification of the joiner shown in the third embodiment. 実施の形態４に示す伸縮部の一構成例を示す断面図である。FIG. 10 is a cross-sectional view illustrating a configuration example of an extension / contraction section shown in a fourth embodiment. （ａ），（ｂ）は、実施の形態４に示す伸縮部の他の構成例を示す断面図である。(A), (b) is sectional drawing which shows the other structural example of the expansion-contraction part shown in Embodiment 4. FIG.

〔実施の形態１〕
以下、本発明の実施の形態について、図面を参照して詳細に説明する。 [Embodiment 1]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

既設管の更生は、既設管内に管状の更生管を形成して、老朽化した既設管の内周面をこの新たな更生管でライニングすることによって行われる。この更生管には、帯状部材を螺旋状に巻回して形成される螺旋管が用いられる。   Rehabilitation of the existing pipe is performed by forming a tubular rehabilitation pipe in the existing pipe and lining the inner peripheral surface of the aging existing pipe with the new rehabilitation pipe. As the rehabilitation pipe, a spiral pipe formed by spirally winding a band-like member is used.

図１は、既設管の更生工法の一例を示す説明図である。図１に示すように、既設管１０の上部マンホール１１、あるいは既設管１０内には、あらかじめ帯状部材（螺旋管形成用帯状部材）２を巻き取ったドラム３０を設置している。このドラム３０は、既設管１０内に配置した自走式の製管機４０に帯状部材２を連続的に供給していくのに用いられる。製管機４０は、帯状部材２を螺旋状に巻回させ、管状に形成していくことで更生管（螺旋管）２０を形成する。   FIG. 1 is an explanatory view showing an example of an existing pipe rehabilitation method. As shown in FIG. 1, a drum 30 around which a belt-shaped member (spiral tube forming belt-shaped member) 2 is wound is installed in the upper manhole 11 of the existing tube 10 or in the existing tube 10. The drum 30 is used to continuously supply the belt-like member 2 to a self-propelled pipe making machine 40 disposed in the existing pipe 10. The pipe making machine 40 forms the rehabilitation pipe (helical pipe) 20 by winding the belt-like member 2 in a spiral shape and forming it into a tubular shape.

図２（ａ），（ｂ）は、本実施の形態１における帯状部材２の形状例を示す断面図である（尚、実施の形態で参照する図面において、断面図におけるハッチングは図示を省略している。）。帯状部材２は長尺帯状の部材であり、合成樹脂により形成される本体部（帯状部材本体）２１と、塑性変形材料（例えば、鉄）により形成される変形保持部材２２とから構成されている。尚、以下の説明では、帯状部材２を巻回して螺旋管を製管したときに、螺旋管の内周面となる側を帯状部材２の内面、螺旋管の外周面となる側を帯状部材２の背面とする。   2A and 2B are cross-sectional views showing examples of the shape of the band-like member 2 in the first embodiment (note that hatching in the cross-sectional views is omitted in the drawings referred to in the embodiment). ing.). The band-shaped member 2 is a long band-shaped member, and includes a main body portion (band-shaped member main body) 21 formed of a synthetic resin and a deformation holding member 22 formed of a plastic deformation material (for example, iron). . In addition, in the following description, when the strip-shaped member 2 is wound to form a spiral tube, the inner circumferential surface of the spiral tube is the inner surface of the strip-shaped member 2 and the outer circumferential surface of the spiral tube is the strip-shaped member. 2 is the back.

本体部２１は、螺旋管に製管されたときに、螺旋管の内周面となる平板部２１１に対し、幅方向の一方の端部に第１嵌合部２１２が設けられ、他方の端部に第２嵌合部２１３が設けられている。第１嵌合部２１２および第２嵌合部２１３は、それぞれ本体部２１の長手方向に沿って形成され、互いに嵌め合わされて接合しうる形状とされている。但し、第１嵌合部２１２および第２嵌合部２１３における具体的形状は、本発明において特に限定されるものではない。   The main body portion 21 is provided with a first fitting portion 212 at one end in the width direction with respect to the flat plate portion 211 serving as the inner peripheral surface of the spiral tube when the main body portion 21 is manufactured into the spiral tube. A second fitting part 213 is provided in the part. The first fitting portion 212 and the second fitting portion 213 are each formed along the longitudinal direction of the main body portion 21 and have a shape that can be fitted together and joined. However, the specific shapes of the first fitting portion 212 and the second fitting portion 213 are not particularly limited in the present invention.

また、本体部２１には、平板部２１１の中途に背面側に突出するように山形に屈曲させた伸縮部２１４が設けられている。この伸縮部２１４は、帯状部材２が、その幅方向に伸長しうるように設けられたものである。伸縮部２１４の断面形状は、図２に示す略Ｕ字形に限定されるものではなく、例えば略三角形や略矩形に屈曲させた形状であってもよい。また、伸縮部２１４の数は、図２に示される２つに限定されるものではなく、伸縮部２１４は少なくとも一つ形成されていればよい。   Further, the main body 21 is provided with an expansion / contraction portion 214 bent in a mountain shape so as to protrude to the back side in the middle of the flat plate portion 211. The stretchable part 214 is provided so that the belt-like member 2 can extend in the width direction. The cross-sectional shape of the expansion / contraction part 214 is not limited to the substantially U shape shown in FIG. 2, and may be a shape bent into a substantially triangular shape or a substantially rectangular shape, for example. Moreover, the number of the expansion / contraction parts 214 is not limited to two shown by FIG. 2, The at least one expansion / contraction part 214 should just be formed.

また、本体部２１においてそれぞれの伸縮部２１４の両側には、背面側に突出するリブ２１５が設けられている。リブ２１５は、支柱部２１５Ａとフランジ部２１５Ｂとから構成されている。支柱部２１５Ａは平板部２１１から背面側に突出するように形成されており、フランジ部２１５Ｂは支柱部２１５Ａの側面から伸縮部２１４側に向かって突出するように設けられている。また、リブ２１５は、第１嵌合部２１２または第２嵌合部２１３の一部として形成されていてもよい。   In the main body 21, ribs 215 projecting to the back side are provided on both sides of the respective stretchable parts 214. The rib 215 includes a column portion 215A and a flange portion 215B. The column portion 215A is formed so as to protrude from the flat plate portion 211 to the back surface side, and the flange portion 215B is provided so as to protrude from the side surface of the column portion 215A toward the expandable portion 214 side. The rib 215 may be formed as a part of the first fitting part 212 or the second fitting part 213.

変形保持部材２２は、伸縮部２１４に与えられた変形を保持するための部材であり、本体部２１に比べて弾性変形域が小さく、塑性変形域が大きい材料からなる。これにより、本体部２１と変形保持部材２２とに同程度の変形量（ひずみ）を与えた場合に、本体部２１では弾性変形をさせ、変形保持部材２２では塑性変形をさせることが可能となる。また、変形保持部材２２は、本体部２１に比べて剛性も高いものとされる。具体的には、変形保持部材２２は、鉄板等を折り曲げ成形して得られるものであり、屈曲部２２１、平板部２２２、および係合部２２３から構成されている。変形保持部材２２は、本体部２１と同様に長手方向に連続的に形成されていてもよく、あるいは、長手方向の長さを本体部２１よりも短くし、本体部２１の背面側に断続的に配置されるものであってもよい。   The deformation holding member 22 is a member for holding the deformation given to the expansion / contraction part 214, and is made of a material having a smaller elastic deformation area and a larger plastic deformation area than the main body part 21. As a result, when the same amount of deformation (strain) is applied to the main body 21 and the deformation holding member 22, the main body 21 can be elastically deformed, and the deformation holding member 22 can be plastically deformed. . In addition, the deformation holding member 22 has higher rigidity than the main body 21. Specifically, the deformation holding member 22 is obtained by bending an iron plate or the like, and includes a bent portion 221, a flat plate portion 222, and an engaging portion 223. The deformation holding member 22 may be formed continuously in the longitudinal direction similarly to the main body portion 21, or the length in the longitudinal direction is shorter than the main body portion 21 and intermittently on the back side of the main body portion 21. It may be arranged in.

屈曲部２２１は、その内部に本体部２１における伸縮部２１４を格納する部分である。このため、屈曲部２２１の内面形状は、伸縮部２１４の外面形状とほぼ同じか、あるいは大きくなるように形成されている。平板部２２２は、屈曲部２２１の両側に形成されており、本体部２１の平板部２１１と接触するように配置される。係合部２２３は、変形保持部材２２の両端部において平板部２２２から背面側に立設するように形成されている。   The bent part 221 is a part for storing the expandable part 214 in the main body part 21 therein. For this reason, the inner surface shape of the bent portion 221 is formed to be substantially the same as or larger than the outer surface shape of the stretchable portion 214. The flat plate portion 222 is formed on both sides of the bent portion 221 and is disposed so as to come into contact with the flat plate portion 211 of the main body portion 21. The engaging portion 223 is formed so as to stand on the back side from the flat plate portion 222 at both ends of the deformation holding member 22.

本発明の帯状部材２を構成するように変形保持部材２２を本体部２１に組み合わせた状態では、変形保持部材２２が伸縮部２１４を跨ぐように配置され、変形保持部材２２の係合部２２３が本体部２１のリブ２１５に係合することによって変形保持部材２２の両端が本体部２１に対して係合固定される。この時、係合部２２３の先端がリブ２１５のフランジ部２１５Ｂによって背面側から押さえ込まれることにより、変形保持部材２２が本体部２１から離脱することが防止できる。   In a state where the deformation holding member 22 is combined with the main body portion 21 so as to constitute the belt-like member 2 of the present invention, the deformation holding member 22 is arranged so as to straddle the expansion / contraction portion 214, and the engaging portion 223 of the deformation holding member 22 is By engaging with the ribs 215 of the main body 21, both ends of the deformation holding member 22 are engaged and fixed with respect to the main body 21. At this time, it is possible to prevent the deformation holding member 22 from being detached from the main body portion 21 by pressing the front end of the engaging portion 223 from the back side by the flange portion 215 </ b> B of the rib 215.

ここで、図２（ａ）は伸縮部２１４が伸長されていない状態（デフォルト状態）を示す図、図２（ｂ）は伸縮部２１４が伸長された状態（伸長状態）を示す図である。帯状部材２をデフォルト状態から伸長状態へと変形させる場合には、例えば、本体部２１に対して幅方向の引張力を加えればよい。あるいは、変形保持部材２２の両端の係合部２２３に対して、これらを両側に押し拡げるような力を加えてもよい。   Here, FIG. 2A is a diagram showing a state where the expansion / contraction part 214 is not extended (default state), and FIG. 2B is a diagram showing a state where the expansion / contraction part 214 is extended (extension state). When the belt-like member 2 is deformed from the default state to the extended state, for example, a tensile force in the width direction may be applied to the main body portion 21. Alternatively, a force may be applied to the engaging portions 223 at both ends of the deformation holding member 22 so as to push and expand them on both sides.

このようにして伸長状態に変形された帯状部材２において、その変形量が予め定められた規定量以内である場合には、本体部２１における伸縮部２１４の変形は弾性変形となる。したがって、伸縮部２１４において白化等の性質の低下は生じない。   In the belt-like member 2 deformed into the extended state in this manner, when the deformation amount is within a predetermined amount, the deformation of the expansion / contraction portion 214 in the main body portion 21 is elastic deformation. Therefore, deterioration of properties such as whitening does not occur in the stretchable portion 214.

一方、デフォルト状態から伸長状態への変形時には変形保持部材２２の屈曲部２２１においても変形が生じるが、この変形は弾性変形ではなく塑性変形によるものとなる。したがって、帯状部材２を伸長状態へ変形させた力を除いた後も、その変形は変形保持部材２２によって保持される。すなわち、伸縮部２１４において生じた変形は変形保持部材２２によって保持される。   On the other hand, at the time of deformation from the default state to the extended state, deformation also occurs in the bent portion 221 of the deformation holding member 22, but this deformation is caused not by elastic deformation but by plastic deformation. Therefore, even after removing the force that deforms the belt-like member 2 to the extended state, the deformation is held by the deformation holding member 22. That is, the deformation generated in the stretchable part 214 is held by the deformation holding member 22.

上記説明では、伸縮部２１４によって帯状部材を幅方向に伸長させる場合を例示したが、本発明はこれに限定されるものではなく、伸縮部２１４によって帯状部材を幅方向に収縮させることも可能である。例えば、図２（ｂ）に示す状態をデフォルト状態とし、この状態から帯状部材２に幅方向の圧縮力を加えて図２（ａ）に示す状態とし、図２（ａ）に示す状態を収縮状態としてもよい。無論、この場合も、帯状部材２に生じる収縮変形は変形保持部材２２によって保持することは可能である。さらに、この場合、図２（ｂ）のデフォルト状態から帯状部材２に幅方向の引張力を加えて伸長状態にすることも可能である。   In the above description, the case where the belt-like member is extended in the width direction by the stretchable part 214 is illustrated, but the present invention is not limited to this, and the belt-like member can be shrunk in the width direction by the stretchable part 214. is there. For example, the state shown in FIG. 2B is set as a default state, and a compressive force in the width direction is applied to the belt-like member 2 from this state to obtain the state shown in FIG. 2A, and the state shown in FIG. It is good also as a state. Of course, also in this case, the contraction deformation generated in the band-shaped member 2 can be held by the deformation holding member 22. Furthermore, in this case, it is also possible to apply a tensile force in the width direction to the belt-like member 2 from the default state of FIG.

本実施の形態１に係る帯状部材２では、変形保持部材２２は、本体部２１の背面側において伸縮部２１４を跨ぐように配置され、かつ、変形保持部材２２の両端が本体部２１に対して伸縮部２１４の両側で固定される。これにより、伸縮部２１４において幅方向に伸長や収縮が生じた場合、その伸長量および収縮量が変形保持部材２２によって保持される。   In the belt-like member 2 according to the first embodiment, the deformation holding member 22 is disposed so as to straddle the expansion / contraction part 214 on the back side of the main body part 21, and both ends of the deformation holding member 22 are opposed to the main body part 21. It is fixed on both sides of the stretchable part 214. Thereby, when expansion and contraction occur in the width direction in the expansion / contraction part 214, the expansion amount and the contraction amount are held by the deformation holding member 22.

尚、図２の例では、変形保持部材２２の係合部２２３を本体部２１のリブ２１５に係合させることによって変形保持部材２２の両端を本体部２１に対して固定している。しかしながら、本発明において、変形保持部材２２の両端を本体部２１に対して固定する方法は、これに限定されるものではない。例えば、図３に示すように、変形保持部材２２の平板部２２２を本体部２１の平板部２１１に接着固定するものであってもよい。この場合は、変形保持部材２２において係合部２２３を省略してもよい。   In the example of FIG. 2, both ends of the deformation holding member 22 are fixed to the main body portion 21 by engaging the engaging portions 223 of the deformation holding member 22 with the ribs 215 of the main body portion 21. However, in the present invention, the method of fixing both ends of the deformation holding member 22 to the main body 21 is not limited to this. For example, as shown in FIG. 3, the flat plate portion 222 of the deformation holding member 22 may be bonded and fixed to the flat plate portion 211 of the main body portion 21. In this case, the engaging portion 223 may be omitted from the deformation holding member 22.

また、本実施の形態１に係る帯状部材２では、変形保持部材２２の屈曲部２２１は、その内部に本体部２１における伸縮部２１４を格納できればよく、その内面形状は伸縮部２１４の外面形状と一致しなくてもよい。このため、例えば図４に示すように、帯状部材２にさらに補強部材２３を組み合わせ、変形保持部材２２の形状を補強部材２３と同一の形状としてもよい。すなわち、変形保持部材２２に補強部材としての機能を兼ね備えさせてもよい。尚、変形保持部材２２を補強部材としても用いる場合は、変形保持部材２２は長手方向に連続的に形成されていることが好ましい。   Further, in the belt-like member 2 according to the first embodiment, the bent portion 221 of the deformation holding member 22 only needs to be able to store the expansion / contraction portion 214 of the main body portion 21 therein, and the inner surface shape thereof is the same as the outer surface shape of the expansion / contraction portion 214. It does not have to match. For this reason, for example, as shown in FIG. 4, the reinforcing member 23 may be further combined with the belt-like member 2, and the shape of the deformation holding member 22 may be the same as that of the reinforcing member 23. That is, the deformation holding member 22 may have a function as a reinforcing member. When the deformation holding member 22 is also used as a reinforcing member, the deformation holding member 22 is preferably formed continuously in the longitudinal direction.

〔実施の形態２〕
上記実施の形態１では、伸縮部２１４において幅方向に伸長や収縮が生じた場合、その伸長量および収縮量を変形保持部材２２によって保持している。これに対し、本実施の形態２では、伸縮部２１４において幅方向に伸長や収縮が生じた場合、伸縮部２１４における変形後の形そのものを変形保持部材２２によって保持する。 [Embodiment 2]
In the first embodiment, when the expansion / contraction part 214 expands or contracts in the width direction, the expansion and contraction amount is held by the deformation holding member 22. In contrast, in the second embodiment, when the expansion / contraction part 214 is expanded or contracted in the width direction, the deformed shape of the expansion / contraction part 214 itself is held by the deformation holding member 22.

図５（ａ），（ｂ）は、本実施の形態２における帯状部材２の形状例を示す断面図である。帯状部材２は長尺帯状の部材であり、本体部２１と変形保持部材２４とから構成されている。本体部２１は、実施の形態１と同様の構成とすることができる。変形保持部材２４は、実施の形態１における変形保持部材２２と同様に、本体部２１に比べて弾性変形域が小さく、塑性変形域が大きい材料からなる。また、変形保持部材２４は、本体部２１に比べて剛性も高いものとされる。   FIGS. 5A and 5B are cross-sectional views showing examples of the shape of the belt-like member 2 in the second embodiment. The band-shaped member 2 is a long band-shaped member, and includes a main body portion 21 and a deformation holding member 24. The main body 21 can have the same configuration as that of the first embodiment. Similar to the deformation holding member 22 in the first embodiment, the deformation holding member 24 is made of a material having a smaller elastic deformation range and a larger plastic deformation range than the main body 21. Further, the deformation holding member 24 has higher rigidity than the main body portion 21.

変形保持部材２４は、本体部２１の背面側に配置され、その内面形状が伸縮部２１４の外面形状とほぼ同じとされ、変形保持部材２４の内面が伸縮部２１４の外面に接着固定されている。   The deformation holding member 24 is disposed on the back side of the main body 21, and the inner surface shape thereof is substantially the same as the outer surface shape of the expansion / contraction part 214, and the inner surface of the deformation holding member 24 is bonded and fixed to the outer surface of the expansion / contraction part 214. .

ここで、図５（ａ）は伸縮部２１４が伸長されていない状態（デフォルト状態）を示す図、図５（ｂ）は伸縮部２１４が伸長された状態（伸長状態）を示す図である。帯状部材２をデフォルト状態から伸長状態へと変形させた場合、変形保持部材２４が伸縮部２１４に接着固定されているため、変形保持部材２４と伸縮部２１４とは一体的に変形する。この時、与えられた変形量が予め定められた規定量以内である場合には、伸縮部２１４の変形は弾性変形となる。したがって、伸縮部２１４において白化等の性質の低下は生じない。一方、変形保持部材２４に生じる変形は塑性変形によるものとなり、伸縮部２１４において生じた変形は、変形を生じさせた力を除いた後も変形保持部材２４によって保持される。   Here, FIG. 5A is a diagram showing a state where the expansion / contraction part 214 is not extended (default state), and FIG. 5B is a diagram showing a state where the expansion / contraction part 214 is extended (extension state). When the belt-like member 2 is deformed from the default state to the extended state, the deformation holding member 24 and the expansion / contraction part 214 are integrally deformed because the deformation holding member 24 is bonded and fixed to the expansion / contraction part 214. At this time, when the given deformation amount is within a predetermined amount, the deformation of the expansion / contraction part 214 is elastic deformation. Therefore, deterioration of properties such as whitening does not occur in the stretchable portion 214. On the other hand, the deformation generated in the deformation holding member 24 is caused by plastic deformation, and the deformation generated in the expansion / contraction portion 214 is held by the deformation holding member 24 even after the force that caused the deformation is removed.

図５に示した例は、変形保持部材２４を伸縮部２１４の全体に接着した構成となっている。しかしながら、本発明はこれに限定されるものでなく、変形保持部材２４を伸縮部２１４の少なくとも一部に接着した構成であってもよい。図６（ａ）〜（ｃ）は、変形保持部材２４を伸縮部２１４の一部に接着した構成例を示す断面図である。また、図７（ａ）〜（ｃ）は、図６（ａ）〜（ｃ）のそれぞれにおいて伸縮部２１４が伸長された状態を示す断面図である。   In the example shown in FIG. 5, the deformation holding member 24 is bonded to the entire stretchable portion 214. However, the present invention is not limited to this, and may be configured such that the deformation holding member 24 is bonded to at least a part of the stretchable portion 214. FIGS. 6A to 6C are cross-sectional views showing a configuration example in which the deformation holding member 24 is bonded to a part of the stretchable portion 214. FIGS. 7A to 7C are cross-sectional views showing a state where the stretchable portion 214 is extended in each of FIGS. 6A to 6C.

図６（ａ）および図７（ａ）に示す構成は、伸縮部２１４の頂部の曲率を変化させ、その曲率変化を変形保持部材２４にて保持するものである。図６（ｂ）および図７（ｂ）に示す構成は、伸縮部２１４の側壁の立ち上がり角度を変化させ、その角度変化を変形保持部材２４にて保持するものである。そして、図６（ｃ）および図７（ｃ）に示す構成は、伸縮部２１４の側壁に曲げを生じさせ、その曲げ変化を変形保持部材２４にて保持するものである。   The configuration shown in FIGS. 6A and 7A changes the curvature of the apex of the stretchable portion 214 and holds the change in curvature with the deformation holding member 24. 6B and 7B change the rising angle of the side wall of the stretchable portion 214 and hold the change in the angle with the deformation holding member 24. 6 (c) and 7 (c) causes the side wall of the expansion / contraction part 214 to be bent, and the bending change is held by the deformation holding member 24.

このように、変形保持部材２４を伸縮部２１４の一部に接着した場合であっても、変形保持部材２４の設けられた箇所に変形を生じさせれば、その変形を変形保持部材２４にて保持することが可能であり、結果として伸縮部２１４に生じた変形量を保持することが可能である。無論、変形保持部材２４は、伸縮部２１４に幅方向の収縮変形を与えたときにこれを保持することも可能である。   As described above, even when the deformation holding member 24 is bonded to a part of the expansion / contraction part 214, if the deformation is caused in the portion where the deformation holding member 24 is provided, the deformation is held by the deformation holding member 24. It is possible to hold, and as a result, it is possible to hold the deformation amount generated in the expansion / contraction part 214. Of course, the deformation holding member 24 can also hold the expansion / contraction part 214 when contracted in the width direction.

また、上記説明では、変形保持部材２４と伸縮部２１４とが一体的に変形するように、変形保持部材２４を伸縮部２１４に接着固定した構成としているが、本発明はこれに限定されるものではない。例えば、図８（ａ）〜（ｄ）に示すように、変形保持部材２４を伸縮部２１４に内包した（埋め込んだ）構成であってもよい。このように、変形保持部材２４を伸縮部２１４に内包した構成であっても、変形保持部材２４と伸縮部２１４とを一体的に変形させることが可能である。この場合、変形保持部材２４は伸縮部２１４の全体に内包（図８（ａ）参照）されていてもよく、伸縮部２１４の少なくとも一部に内包（図８（ｂ）〜（ｄ）参照）されていてもよい。   In the above description, the deformation holding member 24 is bonded and fixed to the expansion / contraction part 214 so that the deformation holding member 24 and the expansion / contraction part 214 are integrally deformed, but the present invention is not limited to this. is not. For example, as shown in FIGS. 8A to 8D, the deformation holding member 24 may be included (embedded) in the stretchable part 214. As described above, even if the deformation holding member 24 is included in the expansion / contraction part 214, the deformation holding member 24 and the expansion / contraction part 214 can be integrally deformed. In this case, the deformation holding member 24 may be included in the entire stretchable portion 214 (see FIG. 8A), and included in at least a part of the stretchable portion 214 (see FIGS. 8B to 8D). May be.

以上のように、実施の形態１および２に記載の帯状部材２は、背面側に突出するように屈曲して形成された伸縮部２１４を有している本体部２１と、伸縮部２１４に外力が加えられて弾性変形が生じたときに伸縮部２１４と共に塑性変形し、外力が除かれた後に伸縮部２１４に生じた変形を保持する変形保持部材２２または２４とを有する。   As described above, the belt-like member 2 described in the first and second embodiments has the main body 21 having the expansion / contraction part 214 formed to be bent so as to protrude toward the back surface, and the external force applied to the expansion / contraction part 214. And a deformation holding member 22 or 24 that plastically deforms together with the expansion / contraction part 214 when elastic deformation occurs and holds the deformation generated in the expansion / contraction part 214 after the external force is removed.

これにより、伸縮部２１４に外力を加えることで幅方向に伸長や収縮の変形を容易に与えることができる。また、伸縮部２１４に変形が生じるときには、同時に変形保持部材２２または２４にも変形が生じる。この時、伸縮部２１４に生じる変形は弾性変形であるが、変形保持部材２２または２４に生じる変形は塑性変形であるため、外力を取り除いても変形保持部材２２または２４に生じた変形は維持され、伸縮部２１４に生じた変形も変形保持部材２２または２４によって保持することができる。   As a result, by applying an external force to the expansion / contraction part 214, it is possible to easily give a deformation such as expansion or contraction in the width direction. In addition, when the expansion / contraction part 214 is deformed, the deformation holding member 22 or 24 is also deformed at the same time. At this time, the deformation generated in the expansion / contraction portion 214 is elastic deformation, but the deformation generated in the deformation holding member 22 or 24 is plastic deformation, so that the deformation generated in the deformation holding member 22 or 24 is maintained even if the external force is removed. The deformation generated in the stretchable part 214 can also be held by the deformation holding member 22 or 24.

伸縮部２１４に生じる変形は弾性変形であるため、伸縮部２１４において白化等の性質の低下は生じない。また、変形保持部材２２または２４は外力を加えるだけで塑性変形するものであり、変形の際に加熱工程等の他の工程を必要としない。したがって、施工工程の増加が生じることもなく、また、施工現場の環境等によって施工が困難になることも生じにくい。   Since the deformation generated in the stretchable portion 214 is elastic deformation, the property such as whitening does not deteriorate in the stretchable portion 214. Further, the deformation holding member 22 or 24 is plastically deformed only by applying an external force, and does not require other processes such as a heating process in the deformation. Therefore, there is no increase in the construction process, and it is difficult for the construction to be difficult due to the environment of the construction site.

〔実施の形態３〕
上記実施の形態１，２では、一種類の帯状部材２を螺旋状に巻回して更生管（螺旋管）２０を形成している。しかしながら、本発明はこれに限定されるものではなく、ダンビー工法のように二種類の帯状部材を螺旋状に巻回して螺旋管を形成する場合にも本発明は適用可能である。本実施の形態３では、ダンビー工法で用いられる帯状部材に本発明を適用する場合を例示する。 [Embodiment 3]
In the first and second embodiments, one type of belt-like member 2 is spirally wound to form a rehabilitation tube (spiral tube) 20. However, the present invention is not limited to this, and the present invention can also be applied to the case where a spiral tube is formed by spirally winding two types of belt-like members as in the Danby method. In this Embodiment 3, the case where this invention is applied to the strip | belt-shaped member used with a Danby construction method is illustrated.

ダンビー工法では、例えば図９および図１０に示すストリップ５およびジョイナー６の二種類の帯状部材を螺旋状に巻回して螺旋管が形成される。ストリップ５は、図９に示すように、幅方向の両端に雌型嵌合部５１，５１が設けられている。ジョイナー６は、図１０に示すように、幅方向の両端に雄型嵌合部６１２，６１２が設けられている。ダンビー工法における螺旋管は、ストリップ５を螺旋状に巻き立てながら、隣り合うストリップ５間にジョイナー６を嵌合することで連続的に形成される。この時、ストリップ５の一方の雌型嵌合部５１とジョイナー６の一方の雄型嵌合部６１２とが互いに嵌め合わされて接合する。   In the Danby method, for example, two types of strip-shaped members such as the strip 5 and the joiner 6 shown in FIGS. 9 and 10 are spirally wound to form a spiral tube. As shown in FIG. 9, the strip 5 is provided with female fitting portions 51 and 51 at both ends in the width direction. As shown in FIG. 10, the joiner 6 is provided with male fitting portions 612 and 612 at both ends in the width direction. The spiral tube in the Danby method is continuously formed by fitting the joiner 6 between adjacent strips 5 while winding the strips 5 in a spiral shape. At this time, one female fitting part 51 of the strip 5 and one male fitting part 612 of the joiner 6 are fitted together and joined.

ダンビー工法においては、螺旋管の破損を防止したり、湾曲部において帯状部材の幅方向に作用する大きな引張力を吸収したりするための伸縮部は、通常、ジョイナー側において設けられる。このため、本実施の形態３では、ジョイナー６が特許請求の範囲に記載の螺旋管形成用帯状部材に該当するものであり、以下の説明ではジョイナー６の構成について説明を行う。   In the Danby method, an expansion / contraction portion for preventing damage to the spiral tube or absorbing a large tensile force acting in the width direction of the belt-like member in the curved portion is usually provided on the joiner side. For this reason, in this Embodiment 3, the joiner 6 corresponds to the strip | belt-shaped member for spiral tube formation as described in a claim, and the structure of the joiner 6 is demonstrated in the following description.

図１０に示すジョイナー６は、長尺帯状の部材であり、合成樹脂により形成される本体部（帯状部材本体）６１と、塑性変形材料（例えば、鉄）により形成される変形保持部材２２とから構成されている。   The joiner 6 shown in FIG. 10 is a long band-shaped member, and includes a main body (band-shaped member main body) 61 formed of a synthetic resin and a deformation holding member 22 formed of a plastic deformation material (for example, iron). It is configured.

本体部６１は、螺旋管に製管されたときに、螺旋管の内周面となる平板部６１１に対し、幅方向の両方の端部に雄型嵌合部６１２，６１２が設けられている。また、本体部６１には、平板部６１１の中途に背面側に突出するように山形に屈曲させた伸縮部６１３が設けられている。この伸縮部６１３は、ジョイナー６が、その幅方向に伸長しうるように設けられたものである。伸縮部６１３の断面形状や数は、実施の形態１および２における帯状部材２の伸縮部２１４と同様に、特に限定されるものではない。   The main body portion 61 is provided with male fitting portions 612 and 612 at both ends in the width direction with respect to the flat plate portion 611 serving as the inner peripheral surface of the spiral tube when the main body portion 61 is manufactured into the spiral tube. . In addition, the main body 61 is provided with an expansion / contraction portion 613 that is bent in a mountain shape so as to protrude to the back side in the middle of the flat plate portion 611. The stretchable portion 613 is provided so that the joiner 6 can extend in the width direction. The cross-sectional shape and number of the stretchable parts 613 are not particularly limited, similar to the stretchable parts 214 of the band-like member 2 in the first and second embodiments.

また、本体部６１においてそれぞれの伸縮部６１３の両側には、背面側に突出するリブ６１４が設けられている。リブ６１４は、雄型嵌合部６１２の一部として形成されていてもよい。   In the main body 61, ribs 614 projecting to the back side are provided on both sides of the respective stretchable parts 613. The rib 614 may be formed as a part of the male fitting part 612.

図１０における変形保持部材２２は、実施の形態１における変形保持部材２２を適用したものである。すなわち、変形保持部材２２が本体部６１の伸縮部６１３を跨ぐように配置され、変形保持部材２２の係合部２２３が本体部６１のリブ６１４に係合することによって変形保持部材２２の両端が本体部６１に対して係合固定される。   The deformation holding member 22 in FIG. 10 is obtained by applying the deformation holding member 22 in the first embodiment. That is, the deformation holding member 22 is arranged so as to straddle the expansion / contraction part 613 of the main body 61, and the engaging portions 223 of the deformation holding member 22 are engaged with the ribs 614 of the main body 61, so that both ends of the deformation holding member 22 are The main body 61 is engaged and fixed.

これにより、伸縮部６１３において幅方向に伸長や収縮が生じた場合、同時に変形保持部材２２にも変形が生じる。この時、伸縮部６１３に生じる変形は弾性変形であるが、変形保持部材２２に生じる変形は塑性変形であるため、外力を取り除いても変形保持部材２２に生じた変形は維持され、伸縮部６１３の伸長量および収縮量を変形保持部材２２によって保持することが可能となる。   Thereby, when expansion | extension and shrinkage | contraction arise in the width direction in the expansion-contraction part 613, a deformation | transformation also arises in the deformation | transformation holding member 22 simultaneously. At this time, the deformation that occurs in the expansion / contraction part 613 is elastic deformation, but the deformation that occurs in the deformation holding member 22 is plastic deformation. Therefore, even if the external force is removed, the deformation generated in the deformation holding member 22 is maintained and the expansion / contraction part 613 is maintained. It is possible to hold the amount of expansion and contraction by the deformation holding member 22.

また、図１０における変形保持部材２２は、図３に示す変形保持部材２２と同様に、変形保持部材２２の平板部２２２を本体部６１の平板部６１１に接着固定した構成に変形することも可能である。   Also, the deformation holding member 22 in FIG. 10 can be deformed to a configuration in which the flat plate portion 222 of the deformation holding member 22 is bonded and fixed to the flat plate portion 611 of the main body portion 61, similarly to the deformation holding member 22 shown in FIG. It is.

さらに、図１０における変形保持部材２２は、実施の形態１における変形保持部材２２を適用した場合を例示しているが、本実施の形態３に係るジョイナー６は、図１１に示すように実施の形態２における変形保持部材２４を適用することも可能である。図１１に示すジョイナー６は、本体部６１の伸縮部６１３の全体に、伸縮部６１３と同一形状とされた変形保持部材２４を内包した（埋め込んだ）構成である。   Furthermore, although the deformation holding member 22 in FIG. 10 illustrates the case where the deformation holding member 22 in the first embodiment is applied, the joiner 6 according to the third embodiment is implemented as shown in FIG. It is also possible to apply the deformation holding member 24 in the second embodiment. The joiner 6 shown in FIG. 11 has a configuration in which the deformation holding member 24 having the same shape as the expansion / contraction part 613 is included (embedded) in the entire expansion / contraction part 613 of the main body 61.

これにより、伸縮部６１３において幅方向に伸長や収縮が生じた場合、同時に変形保持部材２４にも変形が生じる。この時、伸縮部６１３に生じる変形は弾性変形であるが、変形保持部材２４に生じる変形は塑性変形であるため、外力を取り除いても変形保持部材２４に生じた変形は維持され、伸縮部６１３に生じた変形を変形保持部材２４によって保持することが可能となる。   Thereby, when expansion | extension and shrinkage | contraction arise in the width direction in the expansion-contraction part 613, a deformation | transformation arises also in the deformation | transformation holding member 24 simultaneously. At this time, the deformation that occurs in the expansion / contraction part 613 is elastic deformation, but the deformation that occurs in the deformation holding member 24 is plastic deformation. Therefore, even if the external force is removed, the deformation generated in the deformation holding member 24 is maintained, and the expansion / contraction part 613 is maintained. It is possible to hold the deformation that has occurred in the deformation holding member 24.

また、図１１におけるジョイナー６は、図５に示す変形保持部材２４と同様に、変形保持部材２４を伸縮部６１３の外面に接着固定した構成に変形することも可能である。さらには、図６および図８に示す変形保持部材２４と同様に、変形保持部材２４を伸縮部６１３の一部に接着もしくは内包させた構成に変形することも可能である。   In addition, the joiner 6 in FIG. 11 can be deformed to a configuration in which the deformation holding member 24 is bonded and fixed to the outer surface of the stretchable portion 613 in the same manner as the deformation holding member 24 shown in FIG. Furthermore, similarly to the deformation holding member 24 shown in FIGS. 6 and 8, the deformation holding member 24 may be deformed into a configuration in which the deformation holding member 24 is bonded to or included in a part of the stretchable portion 613.

〔実施の形態４〕
上記実施の形態１〜３では、帯状部材２（またはジョイナー６）の本体部２１，６１において、その一部を背面側に突出するように山形に屈曲させて伸縮部２１４，６１３を形成している。しかしながら、本発明はこれに限定されるものではなく、伸縮部を本体部２１，６１と別部材にして設けたり、伸縮部を突出させない形状として設けたりすることも可能である。本実施の形態４では、そのような伸縮部の変形例について図１２，図１３を参照して説明する。 [Embodiment 4]
In the first to third embodiments, in the main body portions 21 and 61 of the belt-like member 2 (or the joiner 6), a part of the main body portions 21 and 61 is bent into a mountain shape so as to protrude to the back side, thereby forming the stretchable portions 214 and 613. Yes. However, the present invention is not limited to this, and the stretchable portion can be provided as a separate member from the main body portions 21 and 61, or the stretchable portion can be provided in a shape that does not protrude. In the fourth embodiment, a modified example of such a stretchable part will be described with reference to FIGS.

図１２に示すジョイナー６では、本体部をジョイナー６の中央部分で分離させた２つの本体部６１，６１とし、その間に本体部６１とは別部材にて形成した伸縮部６２を配置している。伸縮部６２は、蛇腹状に形成された長尺帯状の部材であり、本体部６１，６１に対して背面側に配置される。また、伸縮部６２の幅方向の両端部は、２つの本体部６１，６１のそれぞれに対して、例えば接着等により接合されている。伸縮部６２には、本体部６１，６１よりも低弾性率である材料（例えばゴム）が使用される。   In the joiner 6 shown in FIG. 12, the main body portion is divided into two main body portions 61 and 61 separated by the central portion of the joiner 6, and an expansion / contraction portion 62 formed by a member different from the main body portion 61 is disposed therebetween. . The stretchable part 62 is a long belt-like member formed in a bellows shape, and is disposed on the back side with respect to the main body parts 61 and 61. Further, both end portions in the width direction of the stretchable portion 62 are joined to the two main body portions 61 and 61 by, for example, adhesion or the like. A material (for example, rubber) having a lower elastic modulus than the main body portions 61 and 61 is used for the stretchable portion 62.

また、図１２に示すジョイナー６では、実施の形態１における変形保持部材２２を適用している。変形保持部材２２は、伸縮部６２のさらに背面側において、伸縮部６２を跨ぐように（すなわち、２つの本体部６１，６１の分離箇所を跨ぐように）配置される。また、変形保持部材２２の幅方向の両端部は、２つの本体部６１，６１のそれぞれに対して、係合固定もしくは接着固定される（図１２では係合固定）。   In the joiner 6 shown in FIG. 12, the deformation holding member 22 in the first embodiment is applied. The deformation holding member 22 is arranged on the further back side of the expansion / contraction part 62 so as to straddle the expansion / contraction part 62 (that is, straddle the separation part of the two main body parts 61, 61). Further, both end portions in the width direction of the deformation holding member 22 are engaged and fixed or bonded and fixed to the two main body portions 61 and 61 (engagement and fixing in FIG. 12).

図１２に示すジョイナー６において、幅方向の引張外力が作用した場合、本体部６１，６１には変形は殆ど生じず、中央部の分離箇所における間隔が拡がるように離間するのみである。一方で、伸縮部６２では蛇腹を拡げるように変形が生じる。伸縮部６２に生じた変形は、実施の形態１と同様に変形保持部材２２によって保持することが可能となる。   In the joiner 6 shown in FIG. 12, when a tensile external force in the width direction is applied, the main body portions 61 and 61 are hardly deformed, and are only separated so that the interval at the separation portion in the central portion is widened. On the other hand, the expansion / contraction part 62 is deformed to expand the bellows. The deformation generated in the expansion / contraction portion 62 can be held by the deformation holding member 22 as in the first embodiment.

次に、図１３（ａ），（ｂ）に示すジョイナー６では、本体部をジョイナー６の中央部分で分離させた２つの本体部６１，６１とし、その間に本体部６１とは別部材にて形成した伸縮部６３を配置している。伸縮部６３は、背面側へ突出することなく、本体部６１の平板部６１１と同一平面に配置される。また、伸縮部６３の幅方向の両端部は、２つの本体部６１，６１のそれぞれに対して、例えば接着等により接合されている。伸縮部６３には、本体部６１，６１よりも低弾性率である材料が使用される。   Next, in the joiner 6 shown in FIGS. 13A and 13B, the main body is divided into two main bodies 61 and 61 separated by the central portion of the joiner 6, and a member different from the main body 61 is interposed between them. The formed stretchable part 63 is arranged. The stretchable part 63 is disposed on the same plane as the flat plate part 611 of the main body part 61 without protruding to the back side. Further, both end portions in the width direction of the stretchable portion 63 are joined to the two main body portions 61 and 61 by, for example, adhesion or the like. A material having a lower elastic modulus than the main body portions 61 and 61 is used for the stretchable portion 63.

また、図１３（ａ），（ｂ）に示すジョイナー６では、実施の形態１における変形保持部材２２を適用している。変形保持部材２２は、伸縮部６３の背面側において、伸縮部６３を跨ぐように（すなわち、２つの本体部６１，６１の分離箇所を跨ぐように）配置される。また、変形保持部材２２の幅方向の両端部は、２つの本体部６１，６１のそれぞれに対して、係合固定もしくは接着固定される（図１３（ａ）では係合固定、図１３（ｂ）では接着固定）。   Moreover, in the joiner 6 shown to Fig.13 (a), (b), the deformation | transformation holding member 22 in Embodiment 1 is applied. The deformation holding member 22 is disposed on the back side of the stretchable portion 63 so as to straddle the stretchable portion 63 (that is, straddle the separation portion of the two main body portions 61, 61). Further, both end portions in the width direction of the deformation holding member 22 are engaged and fixed or fixed to each of the two main body portions 61 and 61 (in FIG. 13A, engaged and fixed, FIG. 13B). ).

図１３（ａ），（ｂ）に示すジョイナー６において、幅方向の引張外力が作用した場合、本体部６１，６１には変形は殆ど生じず、中央部の分離箇所における間隔が拡がるように離間するのみである。一方で、伸縮部６３では幅方向に伸長するように変形が生じる。伸縮部６３に生じた変形は、実施の形態１と同様に変形保持部材２２によって保持することが可能となる。   In the joiner 6 shown in FIGS. 13 (a) and 13 (b), when a tensile external force in the width direction is applied, the main body portions 61 and 61 are hardly deformed and are separated so that the interval at the separation portion in the central portion is widened. Just do it. On the other hand, the elastic part 63 is deformed so as to extend in the width direction. The deformation generated in the stretchable part 63 can be held by the deformation holding member 22 as in the first embodiment.

尚、上記説明では、本実施の形態４における伸縮部６２，６３をジョイナー６に適用した場合を例示したが、本実施の形態４における伸縮部は実施の形態１，２における帯状部材２に適用することも可能である。   In the above description, the case where the stretchable parts 62 and 63 in the fourth embodiment are applied to the joiner 6 is exemplified, but the stretchable part in the fourth embodiment is applied to the belt-like member 2 in the first and second embodiments. It is also possible to do.

本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。   The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

２ 帯状部材（螺旋管形成用帯状部材）
１０ 既設管
２０ 更生管（螺旋管）
２１ 本体部（帯状部材本体）
２２，２４ 変形保持部材
２１１ 平板部
２１２ 第１嵌合部
２１３ 第２嵌合部
２１４ 伸縮部
２１５ リブ
２２１ 屈曲部
２２２ 平板部
２２３ 係合部
５ ストリップ
６ ジョイナー（螺旋管形成用帯状部材）
６１ 本体部（帯状部材本体）
６２，６３ 伸縮部
６１１ 平板部
６１２ 雄型嵌合部
６１３ 伸縮部
６１４ リブ 2 Strip member (Strip member for spiral tube formation)
10 Existing pipe 20 Rehabilitation pipe (spiral pipe)
21 Main body (band-shaped member main body)
22, 24 Deformation holding member 211 Flat plate portion 212 First fitting portion 213 Second fitting portion 214 Stretching portion 215 Rib 221 Bending portion 222 Flat plate portion 223 Engaging portion 5 Strip 6 Joiner (Spiral tube forming strip member)
61 Main body (band-shaped member main body)
62,63 Stretchable part 611 Flat part 612 Male fitting part 613 Stretchable part 614 Rib

Claims (7)

螺旋状に巻回されて螺旋管を形成する螺旋管形成用帯状部材であって、
前記螺旋管の内周面となる平板部を有する帯状部材本体と、
弾性変形により当該螺旋管形成用帯状部材の幅方向に伸長または圧縮が可能な伸縮部と、
前記伸縮部に外力が加えられて弾性変形が生じたときに前記伸縮部と共に塑性変形し、前記外力が除かれた後に前記伸縮部に生じた変形を保持する変形保持部材とを有することを特徴とする螺旋管形成用帯状部材。 A spiral tube-forming band-shaped member that is spirally wound to form a spiral tube,
A belt-like member body having a flat plate portion which is an inner peripheral surface of the spiral tube;
An elastic part capable of extending or compressing in the width direction of the spiral tube forming strip member by elastic deformation;
A deformation holding member that plastically deforms together with the expansion and contraction part when an external force is applied to the expansion and contraction part and holds the deformation generated in the expansion and contraction part after the external force is removed. A strip-shaped member for forming a helical tube. 螺旋状に巻回されて螺旋管を形成する螺旋管形成用帯状部材であって、
前記螺旋管の内周面となる平板部を有する帯状部材本体と、
弾性変形により当該螺旋管形成用帯状部材の幅方向に伸長または圧縮が可能な伸縮部と、
前記帯状部材本体に比べて弾性範囲が小さい材料からなり、前記伸縮部を跨ぐように配置され、その両端部が前記伸縮部の両側で前記帯状部材本体に対して固定される変形保持部材とを有することを特徴とする螺旋管形成用帯状部材。 A spiral tube-forming band-shaped member that is spirally wound to form a spiral tube,
A belt-like member body having a flat plate portion which is an inner peripheral surface of the spiral tube;
An elastic part capable of extending or compressing in the width direction of the spiral tube forming strip member by elastic deformation;
A deformation holding member made of a material having a smaller elastic range than the belt-shaped member main body, arranged so as to straddle the stretchable portion, and having both end portions fixed to the belt-shaped member main body on both sides of the stretchable portion. A strip-shaped member for forming a helical tube, comprising: 請求項２に記載の螺旋管形成用帯状部材であって、
前記帯状部材本体は、前記伸縮部の両側に本体側係合部を有しており、
前記変形保持部材は、その両端部に保持部材側係合部を有しており、
前記変形保持部材は、前記本体側係合部との前記保持部材側係合部との係合によって、前記帯状部材本体に対して固定されることを特徴とする螺旋管形成用帯状部材。 It is a strip | belt-shaped member for spiral tube formation of Claim 2, Comprising:
The band-shaped member body has body side engaging portions on both sides of the stretchable portion,
The deformation holding member has a holding member side engaging portion at both ends thereof,
The belt-shaped member for forming a helical tube, wherein the deformation holding member is fixed to the belt-shaped member main body by engagement of the main body side engaging portion with the holding member side engaging portion. 螺旋状に巻回されて螺旋管を形成する螺旋管形成用帯状部材であって、
前記螺旋管の内周面となる平板部を有する帯状部材本体と、
弾性変形により当該螺旋管形成用帯状部材の幅方向に伸長または圧縮が可能な伸縮部と、
前記帯状部材本体に比べて弾性範囲が小さい材料からなり、前記伸縮部の少なくとも一部に接着もしくは内包される変形保持部材とを有することを特徴とする螺旋管形成用帯状部材。 A spiral tube-forming band-shaped member that is spirally wound to form a spiral tube,
A belt-like member body having a flat plate portion which is an inner peripheral surface of the spiral tube;
An elastic part capable of extending or compressing in the width direction of the spiral tube forming strip member by elastic deformation;
A belt-shaped member for forming a helical tube, comprising a deformation holding member made of a material having a smaller elastic range than the belt-shaped member main body and adhered or included in at least a part of the stretchable part. 請求項１から４の何れか一つに記載の螺旋管形成用帯状部材であって、
前記伸縮部は、前記帯状部材本体の一部として形成されていることを特徴とする螺旋管形成用帯状部材。 It is a strip | belt-shaped member for spiral tube formation as described in any one of Claim 1 to 4,
The belt-like member for forming a helical tube, wherein the stretchable part is formed as a part of the belt-like member main body. 請求項１から４の何れか一つに記載の螺旋管形成用帯状部材であって、
前記帯状部材本体が複数に分離して設けられており、
前記伸縮部は、分離された前記帯状部材本体の間に配置されていることを特徴とする螺旋管形成用帯状部材。 It is a strip | belt-shaped member for spiral tube formation as described in any one of Claim 1 to 4,
The band-shaped member main body is provided separately in a plurality,
The belt-like member for forming a helical tube, wherein the stretchable part is disposed between the separated belt-like member main bodies. 請求項１から６の何れか一つに記載の螺旋管形成用帯状部材であって、
前記伸縮部は、前記螺旋管の外周面となる側を前記螺旋管形成用帯状部材の背面とするとき、前記背面側に突出するように屈曲して形成されていることを特徴とする螺旋管形成用帯状部材。 It is a strip | belt-shaped member for spiral tube formation as described in any one of Claim 1 to 6,
The expansion / contraction part is formed so as to be bent so as to protrude toward the back surface side when the side that becomes the outer peripheral surface of the spiral tube is the back surface of the spiral tube forming strip member. Forming strip member.
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