JP3737671B2 - Flexible pipe fittings - Google Patents

Flexible pipe fittings Download PDF

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Publication number
JP3737671B2
JP3737671B2 JP2000109775A JP2000109775A JP3737671B2 JP 3737671 B2 JP3737671 B2 JP 3737671B2 JP 2000109775 A JP2000109775 A JP 2000109775A JP 2000109775 A JP2000109775 A JP 2000109775A JP 3737671 B2 JP3737671 B2 JP 3737671B2
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JP
Japan
Prior art keywords
cylinder
side mounting
wall drilling
mounting cylinder
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2000109775A
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Japanese (ja)
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JP2001295971A (en
Inventor
聡 斎藤
康之 宮部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Plastics Inc
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Mitsubishi Plastics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Plastics Inc filed Critical Mitsubishi Plastics Inc
Priority to JP2000109775A priority Critical patent/JP3737671B2/en
Publication of JP2001295971A publication Critical patent/JP2001295971A/en
Application granted granted Critical
Publication of JP3737671B2 publication Critical patent/JP3737671B2/en
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  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Joints Allowing Movement (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、可撓性管継手に関し、詳しくは、情報管路や下水管路に設けられたマンホールやハンドホールの壁削孔部に、管路を形成する管体を接続する際に用いられる可撓性管継手に関する。
【０００２】
【従来の技術】
マンホールやハンドホールと管体とを接続する際に用いられる可撓性管継手として、マンホール等の壁削孔部に固定される壁削孔部側取付筒と管体に固定される管体側取付筒との間に蛇腹部を設けた可撓性管継手が知られている（特開平１１−２１９３０号公報参照）。
【０００３】
【発明が解決しようとする課題】
しかし、従来の可撓性管継手では、蛇腹部が壁削孔部から外部の土中に突出しているため、土圧によって蛇腹部に土砂が詰まり、可撓性部分としての機能が十分に発揮できなくなることがあった。
【０００４】
そこで本発明は、可撓性部分に土圧が直接かからずに、その機能を確実に得られる可撓性管継手を提供することを目的としている。
【０００５】
【課題を解決するための手段】
上記目的を達成するため、本発明の可撓性管継手は、マンホール、ハンドホール等の壁削孔部に固定される大径の壁削孔部側取付筒と、壁削孔部に接続する管路の管体に固定される小径の管体側取付筒と、壁削孔部側取付筒と管体側取付筒との間を連結する可撓性の連結筒とを有し、該連結筒は、壁削孔部側取付筒から管体側取付筒方向に延出した大径筒と、該大径筒の延出端から壁削孔部側取付筒内周方向に折り返された中間筒と、管体側取付筒から壁削孔部側取付筒方向に延出して前記中間筒の折り返し方向先端に接続する小径筒とにより形成され、前記大径筒と中間筒との折り返し部を前記壁削孔部の内周に位置させるとともに、壁削孔部内周と管体側取付筒外周との間に、柔軟性を有するクッション材が挿入されることを特徴としている。
【０００６】
【発明の実施の形態】
図１及び図２は、本発明の可撓性管継手の一形態例を示すもので、図１は施工時の状態を示す一部断面正面図、図２は管体が軸方向に変位した状態を示す一部断面正面図である。この可撓性管継手１０は、マンホールやハンドホール１１の壁面に形成された壁削孔部１２に、管路を構成する管体１３を接続する際に用いられるものであって、壁削孔部１２に固定される大径の壁削孔部側取付筒１４と、管体１３に固定される小径の管体側取付筒１５と、壁削孔部側取付筒１４と管体側取付筒１５との間を連結する可撓性の連結筒１６とを有している。
【０００７】
壁削孔部側取付筒１４は、壁削孔部１２に対応した外径を有するものであって、内周に装着された拡径バンド１７で拡径されることにより、外周面が壁削孔部１２の内周面に圧着されて固定される。壁削孔部側取付筒１４と壁削孔部１２との間には、必要に応じて水膨張性ゴムや粘着性接着剤を介在させることができる。
【０００８】
管体側取付筒１５は、管体１３に対応した外径を有するものであって、外周に装着された締付けバンド１８で締付けられることにより、内周面が管体１３の外周面に圧着されて固定される。管体１３が本形態例に示すリブパイプの場合は、管体側取付筒１５と管体１３との間に適宜な形状の止水リング１９が装着される。通常のパイプの場合は、前記同様に水膨張性ゴムや粘着性接着剤を用いることができる。
【０００９】
前記連結筒１６は、壁削孔部側取付筒１４から管体側取付筒１５の方向に延出した大径筒２１と、該大径筒２１の延出端２１ａから壁削孔部側取付筒１４の内周方向に折り返された中間筒２２と、管体側取付筒１５から壁削孔部側取付筒１４の方向に延出して前記中間筒２２の折り返し方向先端２２ａに接続する小径筒２３とにより形成されており、前記大径筒２１と中間筒２２との折り返し部（大径筒２１の延出端２１ａ）が前記壁削孔部１２の内周に位置するように形成されている。
【００１０】
管体１３の接続作業は、可撓性管継手１０の壁削孔部側取付筒１４を拡径バンド１７によって壁削孔部１２に固定した後、あらかじめ止水リング１９を装着した管体１３を管体側取付筒１５内に挿入し、締付けバンド１８で締付ける手順で行われ、最後に、壁削孔部１２と管体側取付筒１５との間に、柔軟性を有するスポンジ等からなるクッション材２０を挿入して終了する。
【００１１】
このように、形成した可撓性管継手１０は、連結筒１６における折り返し構造によって管体１３の角度変位に対応することができ、さらに、地震等によって管体１３が軸方向に移動した場合でも、図２に示すように、折り返されていた中間筒２２が管体１３の移動に追従して変形するので、管体１３やマンホール等に大きな負荷がかかることがなくなる。
【００１２】
そして、可撓性部分である連結筒１６の全体が壁削孔部１２の内部に位置しているので、土圧が直接作用することがなくなり、また、クッション材２０を設けておくことにより、連結筒１６部分への土砂の侵入も防止できるので、連結筒１６が有する可撓性が失われることがなく、可撓性部分としての機能を十分に発揮できる。
【００１３】
【発明の効果】
以上説明したように、本発明の可撓性管継手によれば、管体の角度変位や軸方向の変位に追従して確実に変形するので、管体やマンホール等に大きな負荷がかかることがなく、止水性が損なわれることもない。
【図面の簡単な説明】
【図１】 本発明の可撓性管継手の一形態例を示す施工時の状態の一部断面正面図である。
【図２】 管体が軸方向に変位した状態を示す一部断面正面図である。
【符号の説明】
１０…可撓性管継手、１２…壁削孔部、１３…管体、１４…壁削孔部側取付筒、１５…管体側取付筒、１６…連結筒、１７…拡径バンド、１８…締付けバンド、１９…止水リング、２０…クッション材、２１…大径筒、２２…中間筒、２３…小径筒[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flexible pipe joint, and more specifically, is used when connecting a pipe body forming a pipe line to a wall drilling part of a manhole or a handhole provided in an information pipe line or a sewage pipe line. The present invention relates to a flexible pipe joint.
[0002]
[Prior art]
As a flexible pipe joint used when connecting a manhole or handhole to a pipe body, a wall drilling part side mounting cylinder fixed to a wall drilling part such as a manhole and a pipe body side mounting fixed to the pipe body A flexible pipe joint in which a bellows portion is provided between the cylinder and the cylinder is known (see JP-A-11-21930).
[0003]
[Problems to be solved by the invention]
However, in the conventional flexible pipe joint, since the bellows part protrudes from the wall drilling part into the outside soil, the bellows part is clogged by earth pressure, and the function as a flexible part is fully exhibited. I couldn't do it.
[0004]
Accordingly, an object of the present invention is to provide a flexible pipe joint that can reliably obtain the function without applying earth pressure directly to the flexible portion.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the flexible pipe joint of the present invention is connected to a large-diameter wall drilling portion-side mounting cylinder fixed to a wall drilling portion such as a manhole or a hand hole, and the wall drilling portion. A small-diameter tube-side mounting cylinder fixed to the pipe body of the conduit, and a flexible connecting cylinder that connects between the wall drilling hole-side mounting cylinder and the tube-side mounting cylinder, A large diameter tube extending from the wall drilling hole side mounting tube in the tube side mounting cylinder direction, and an intermediate cylinder folded back from the extending end of the large diameter tube in the wall drilling hole side mounting tube inner circumferential direction; A small-diameter cylinder extending from the tubular body-side mounting cylinder toward the wall drilling hole-side mounting cylinder and connected to a tip in the folding direction of the intermediate cylinder, and the folded portion between the large-diameter cylinder and the intermediate cylinder serves as the wall drilling hole. Rutotomoni is located at the inner periphery of the parts, between the wall drilling portion circumference and the tube side mounting cylinder periphery, is characterized in that a cushion material having flexibility is inserted That.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show one embodiment of the flexible pipe joint according to the present invention. FIG. 1 is a partially sectional front view showing a state at the time of construction, and FIG. 2 shows that the pipe body is displaced in the axial direction. It is a partial cross section front view which shows a state. This flexible pipe joint 10 is used when connecting a tube body 13 constituting a pipe line to a wall drilling portion 12 formed on the wall surface of a manhole or handhole 11, A large-diameter wall drilling portion side mounting cylinder 14 fixed to the portion 12, a small-diameter tube-side mounting cylinder 15 fixed to the tube body 13, a wall drilling portion-side mounting cylinder 14 and a tube body side mounting cylinder 15; And a flexible connecting tube 16 that connects the two.
[0007]
The wall drilling portion side mounting cylinder 14 has an outer diameter corresponding to the wall drilling portion 12 and is expanded in diameter by a diameter expansion band 17 attached to the inner periphery, so that the outer peripheral surface is wall-cut. The inner peripheral surface of the hole 12 is crimped and fixed. A water-expandable rubber or a sticky adhesive can be interposed between the wall drilling portion side mounting cylinder 14 and the wall drilling portion 12 as necessary.
[0008]
The tubular body side mounting cylinder 15 has an outer diameter corresponding to the tubular body 13, and is tightened by a fastening band 18 attached to the outer periphery, whereby the inner peripheral surface is crimped to the outer peripheral surface of the tubular body 13. Fixed. In the case where the pipe body 13 is a rib pipe shown in this embodiment, a water stop ring 19 having an appropriate shape is mounted between the pipe-side attachment tube 15 and the pipe body 13. In the case of a normal pipe, a water-expandable rubber or a sticky adhesive can be used as described above.
[0009]
The connecting cylinder 16 includes a large-diameter cylinder 21 extending from the wall drilling hole side mounting cylinder 14 toward the tube body mounting cylinder 15, and a wall drilling hole side mounting cylinder from the extended end 21 a of the large diameter cylinder 21. 14, an intermediate cylinder 22 folded back in the inner circumferential direction, and a small diameter cylinder 23 extending from the tube side mounting cylinder 15 toward the wall drilling hole side mounting cylinder 14 and connected to the distal end 22a in the folding direction of the intermediate cylinder 22. The folded portion of the large-diameter cylinder 21 and the intermediate cylinder 22 (the extended end 21a of the large-diameter cylinder 21) is formed so as to be located on the inner periphery of the wall drilling portion 12.
[0010]
The tube body 13 is connected by fixing the wall drilling portion side mounting cylinder 14 of the flexible pipe joint 10 to the wall drilling portion 12 with the enlarged diameter band 17 and then mounting the water stop ring 19 in advance. Is inserted into the tube-side mounting cylinder 15 and tightened by the tightening band 18, and finally, a cushion material made of a flexible sponge or the like between the wall drilling portion 12 and the tube-side mounting cylinder 15 is used. Insert 20 to finish.
[0011]
In this way, the formed flexible pipe joint 10 can cope with the angular displacement of the pipe body 13 by the folded structure in the connecting cylinder 16, and even when the pipe body 13 moves in the axial direction due to an earthquake or the like. As shown in FIG. 2, since the folded intermediate tube 22 is deformed following the movement of the tube 13, a large load is not applied to the tube 13, the manhole, and the like.
[0012]
And since the whole connection cylinder 16 which is a flexible part is located in the inside of the wall drilling part 12, earth pressure does not act directly, and by providing cushioning material 20, Since the intrusion of earth and sand into the connecting cylinder 16 can be prevented, the flexibility of the connecting cylinder 16 is not lost, and the function as the flexible part can be sufficiently exhibited.
[0013]
【The invention's effect】
As described above, according to the flexible pipe joint of the present invention, it deforms reliably following the angular displacement and axial displacement of the pipe body, so that a large load is applied to the pipe body, manhole, etc. There is no loss of waterstop.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional front view of a construction state showing an embodiment of a flexible pipe joint of the present invention.
FIG. 2 is a partial cross-sectional front view showing a state where a tube body is displaced in an axial direction.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Flexible pipe joint, 12 ... Wall drilling part, 13 ... Tube, 14 ... Wall drilling part side installation cylinder, 15 ... Tube body side installation cylinder, 16 ... Connection cylinder, 17 ... Expanding band, 18 ... Tightening band, 19 ... Water stop ring, 20 ... Cushion material, 21 ... Large diameter cylinder, 22 ... Intermediate cylinder, 23 ... Small diameter cylinder

Claims (1)

マンホール、ハンドホール等の壁削孔部に固定される大径の壁削孔部側取付筒と、壁削孔部に接続する管路の管体に固定される小径の管体側取付筒と、壁削孔部側取付筒と管体側取付筒との間を連結する可撓性の連結筒とを有し、該連結筒は、壁削孔部側取付筒から管体側取付筒方向に延出した大径筒と、該大径筒の延出端から壁削孔部側取付筒内周方向に折り返された中間筒と、管体側取付筒から壁削孔部側取付筒方向に延出して前記中間筒の折り返し方向先端に接続する小径筒とにより形成され、前記大径筒と中間筒との折り返し部を前記壁削孔部の内周に位置させるとともに、壁削孔部内周と管体側取付筒外周との間に、柔軟性を有するクッション材が挿入されることを特徴とする可撓性管継手。A large-diameter wall drilling part-side mounting cylinder fixed to a wall drilling part such as a manhole or a hand hole, and a small-diameter tube-side mounting cylinder fixed to a pipe body connected to the wall drilling part, A flexible connecting cylinder that connects between the wall drilling hole side mounting cylinder and the tube side mounting cylinder, and the connecting cylinder extends from the wall drilling hole side mounting cylinder in the tube side mounting cylinder direction A large diameter cylinder, an intermediate cylinder folded back from the extended end of the large diameter cylinder in the inner peripheral direction of the wall drilling hole side mounting cylinder, and extending from the tube side mounting cylinder to the wall drilling hole side mounting cylinder direction. wherein it is formed by a small diameter cylinder that connects to the folded forward end of the intermediate cylinder, the Rutotomoni the folded portion between the large-diameter intermediate tube is located at the inner periphery of the wall drilling unit, wall drilling inner peripheral and tube A flexible pipe joint, wherein a cushioning material having flexibility is inserted between the outer circumference of the body-side mounting cylinder.
JP2000109775A 2000-04-11 2000-04-11 Flexible pipe fittings Expired - Lifetime JP3737671B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000109775A JP3737671B2 (en) 2000-04-11 2000-04-11 Flexible pipe fittings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000109775A JP3737671B2 (en) 2000-04-11 2000-04-11 Flexible pipe fittings

Publications (2)

Publication Number Publication Date
JP2001295971A JP2001295971A (en) 2001-10-26
JP3737671B2 true JP3737671B2 (en) 2006-01-18

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3597789B2 (en) * 2001-01-23 2004-12-08 早川ゴム株式会社 Manhole structure, watertight flexible joint for manhole structure and method of construction of manhole structure
CN102296634A (en) * 2011-06-16 2011-12-28 天津市泽宝水泥制品有限公司 Concrete inspection well chamber with flexible interface connection branch

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