JP6862481B2

JP6862481B2 - Flexible fitting pipe

Info

Publication number: JP6862481B2
Application number: JP2019008783A
Authority: JP
Inventors: 隆治小澤
Original assignee: タイフレックス株式会社
Priority date: 2019-01-22
Filing date: 2019-01-22
Publication date: 2021-04-21
Anticipated expiration: 2039-01-22
Also published as: JP2020118210A

Description

本発明は、可撓性継手管、特に、狭い配管スペース内においても相手方配管要素との接続を熱融着などによって容易に行うことができるだけでなく、管路の引き廻しの自由度を向上させることのできる対策が講じられた可撓性継手管に関する。 INDUSTRIAL APPLICABILITY The present invention not only makes it easy to connect to a mating piping element by heat fusion or the like even in a flexible joint pipe, particularly in a narrow piping space, and also improves the degree of freedom in routing the pipeline. With respect to flexible fitting pipes for which possible measures have been taken.

導水・送水・排水などの配水管路の耐震性を向上させ得る管体として可撓性に優れたポリエチレン管が知られている。また、ポリエチレン管は、高い耐震性を発揮し得るだけでなく、耐久性や耐食性に優れ、切断加工などが容易で軽量であるために施工性にも優れていると云った多くの長所を有している。さらに、ポリエチレン管は、ポリエチレン樹脂などの樹脂製の継手との熱融着による接続が可能であるので、ポリエチレン管を採用した配管系では、ポリエチレン管と樹脂製の継手とを熱融着によって接続することが多く行われている。 Polyethylene pipes with excellent flexibility are known as pipes that can improve the seismic resistance of water distribution pipelines such as water conveyance, water supply, and drainage. In addition, polyethylene pipes not only can exhibit high earthquake resistance, but also have many advantages such as excellent durability and corrosion resistance, easy cutting and light weight, and excellent workability. doing. Further, since the polyethylene pipe can be connected to a resin joint such as polyethylene resin by heat fusion, in a piping system using a polyethylene pipe, the polyethylene pipe and the resin joint are connected by heat fusion. There are many things to do.

図９はポリエチレン管を採用した従来例による配管系を例示した説明図である。同図は、マンションなどの中高層建築物のパイプスペース（ＰＳ）と呼ばれる配管スペース内で立て管１００と水道メータ２００とを接続している配管系を示している。同図のように、この配管系では、立て管１００に介在されたＴ形分岐継手１１１の横向き接続口１１２とＴ形分岐継手１１１よりも低位に設置された水道メータ２００の横向き接続口２０１とが、複数個の継手１１３，１１４，１１５、１１６や複数本の直管でなる接続短管１１７、１１８，１１９などを用いて接続されている。また、立て管１００や接続短管１１７〜１１９にはポリエチレン管が採用され、Ｔ形分岐継手１１１や他の継手１１３〜１１６にポリエチレン製の熱融着継手が採用されている。熱融着継手とは、接合面に電熱線を埋め込んだ継手（受け口）に管（挿し口）をセットした後、コントローラから通電して電熱線を発熱させ、受け口の内周面と挿し口の外周面とを加熱溶融して融着して一体化させるという接合方式を採用した継手のことであり、ＥＦ（エレクトロフュージョン）継手とも称されている。 FIG. 9 is an explanatory diagram illustrating a piping system according to a conventional example in which a polyethylene pipe is used. The figure shows a piping system connecting a vertical pipe 100 and a water meter 200 in a piping space called a pipe space (PS) of a medium-to-high-rise building such as an apartment. As shown in the figure, in this piping system, the horizontal connection port 112 of the T-shaped branch joint 111 interposed in the vertical pipe 100 and the horizontal connection port 201 of the water meter 200 installed lower than the T-shaped branch joint 111. However, they are connected by using a plurality of joints 113, 114, 115, 116 and connecting short pipes 117, 118, 119 composed of a plurality of straight pipes. Further, polyethylene pipes are used for the vertical pipes 100 and connecting short pipes 117 to 119, and polyethylene heat-sealing joints are used for the T-shaped branch joints 111 and other joints 113 to 116. A heat-sealing joint is a joint (receptacle) in which a heating wire is embedded in the joint surface. It is a joint that employs a joining method in which the outer peripheral surface is heated and melted, fused, and integrated, and is also called an EF (electrofusion) joint.

一方、上記の配管系では、Ｔ形分岐継手１１１の横向き接続口１１２と水道メータ２００の横向き接続口２０１とを管路で接続するのに、他の継手１１３〜１１６などの複数個の継手類と、複数本の接続短管１１７〜１１９とを使用している。また、この配管系では、Ｔ形分岐継手１１１の横向き接続口１１２と接続短管１１７とを熱融着継手でなる継手１１３を介して略水平に接続して管路を横向きに伸ばし、接続短管１１７と接続短管１１８とをエルボ形の熱融着継手でなる継手１１４を介して接続して管路を下向きに伸ばし、さらに、接続短管１１８と接続短管１１９とをエルボ形の熱融着継手でなる継手１１５を介して接続して管路を横向きに伸ばすといった施工が行われている。 On the other hand, in the above piping system, a plurality of joints such as other joints 113 to 116 are used to connect the horizontal connection port 112 of the T-shaped branch joint 111 and the horizontal connection port 201 of the water meter 200 by a pipeline. And a plurality of connecting short pipes 117 to 119 are used. Further, in this piping system, the lateral connection port 112 of the T-shaped branch joint 111 and the connecting short pipe 117 are connected substantially horizontally via a joint 113 made of a heat-sealing joint to extend the pipeline laterally to shorten the connection. The pipe 117 and the connecting short pipe 118 are connected via a joint 114 made of an elbow-shaped heat-sealing joint to extend the pipe line downward, and further, the connecting short pipe 118 and the connecting short pipe 119 are connected by an elbow-shaped heat. Construction is performed such as connecting via a joint 115 made of a fusion joint and extending the pipeline sideways.

他方、先行例には、可撓性樹脂で形成された主管と分岐管とを熱融着継手を使用して接続することが示されている（たとえば特許文献１参照）。 On the other hand, in the preceding example, it is shown that the main pipe and the branch pipe made of the flexible resin are connected by using a heat fusion joint (see, for example, Patent Document 1).

特開２００８−４５６８４号公報Japanese Unexamined Patent Publication No. 2008-45684

しかしながら、図９を参照して説明した従来例の配管系では、高さの異なるＴ形分岐継手１１１の横向き接続口１１２と水道メータ２００の横向き接続口２０１とを接続するのに、個々に独立した配管要素である複数個の継手１１３〜１１６や複数本の接続短管１１７〜１１９が必要になるだけでなく、熱融着継手でなる継手１１３〜１１６の融着箇所の数が多くなって熱融着に多くの手間及び時間と労力が必要になるという問題があり、この問題点は、狭い配管スペース内での作業を余儀なくされる場合に特に顕著に現れる傾向があった。また、従来例では、接続短管１１７〜１１９に一定の可撓性を備える直管でなるポリエチレン管が採用されているとしても、直管でなるポリエチレン管による曲がり性能はそれほど大きくなく、狭い配管スペース内で用い得る長さのポリエチレン管では地震などの振動を吸収し得る程度に過ぎない。したがって、１本のポリエチレン管を湾曲状やループ状に曲げて施工（曲げ施工）することには無理があり、適切ではない。このため、他の配管やガスメータといった機器などの配管要素が混在する狭い配管スペース内で、それらの配管要素を迂回する管路を構成することが要求される場合に従来例に準じた配管系を採用すると、さらに多くの接続短管や多くの種類の継手類が必要になるだけでなく、管路の取り回し（引き回し）も複雑になり、熱融着にもさらに多くの手間及び時間と労力が必要になるという問題が生じる。 However, in the conventional piping system described with reference to FIG. 9, the horizontal connection port 112 of the T-shaped branch joint 111 having a different height and the horizontal connection port 201 of the water meter 200 are individually connected independently. Not only is it necessary to have a plurality of joints 113 to 116 and a plurality of connecting short pipes 117 to 119, which are piping elements, but also the number of fusion points of the joints 113 to 116, which are heat fusion joints, has increased. There is a problem that heat fusion requires a lot of labor, time and labor, and this problem tends to be particularly remarkable when the work is forced in a narrow piping space. Further, in the conventional example, even if a polyethylene pipe made of a straight pipe having a certain degree of flexibility is adopted for the connecting short pipes 117 to 119, the bending performance of the polyethylene pipe made of a straight pipe is not so large and the pipe is narrow. A polyethylene pipe of a length that can be used in a space can only absorb vibrations such as earthquakes. Therefore, it is not appropriate to bend one polyethylene pipe into a curved shape or a loop shape (bending construction). For this reason, when it is required to construct a pipeline that bypasses those piping elements in a narrow piping space where piping elements such as other piping and equipment such as a gas meter are mixed, a piping system according to the conventional example is used. If adopted, not only will more connecting short pipes and many types of fittings be required, but also the routing (routing) of the pipeline will become complicated, and more labor, time and labor will be required for heat fusion. The problem arises that it is needed.

また、中高層建築物の区画壁などを貫通する管路の施工にポリエチレン管を用いると、壁貫通箇所で防火区画専用の処理材をポリエチレン管に巻き付けてポリエチレン管の熱による溶融を回避させることが必要になる。そのため、管路の壁貫通箇所にポリエチレン管を用いると、防火区画専用の処理材をポリエチレン管に巻き付けることに伴う多くの手間と労力を要するという問題もあった。 In addition, if a polyethylene pipe is used to construct a pipeline that penetrates the partition wall of a medium-to-high-rise building, it is possible to wrap a treatment material dedicated to the fire protection section around the polyethylene pipe at the wall penetration point to avoid melting due to the heat of the polyethylene pipe. You will need it. Therefore, if a polyethylene pipe is used at a portion penetrating the wall of the pipeline, there is also a problem that a lot of labor and labor are required to wind the treatment material dedicated to the fire protection section around the polyethylene pipe.

本発明は以上の状況に鑑みてなされたものであり、高さだけでなく向きの異なる接続口同士を、他の配管要素が混在する狭い配管スペース内で接続する際に、継手や接続短管といった配管要素の必要数を最少限度に抑え、かつ、融着箇所の数も可及的少なく抑えることが可能であり、しかも、施工に要する手間及び時間と労力を可及的少なくすることのできる可撓性継手管を提供することを目的とする。 The present invention has been made in view of the above circumstances, and when connecting connection ports having different orientations as well as heights in a narrow piping space in which other piping elements are mixed, a joint or a connecting short pipe is used. It is possible to minimize the required number of piping elements such as, and to minimize the number of fusion points, and it is possible to reduce the labor, time and labor required for construction as much as possible. It is an object of the present invention to provide a flexible joint pipe.

また、本発明は、中高層建築物の区画壁などを貫通する管路を施工する際に、防火区画専用の処理材を用いることの必要性を無くして多くの手間と労力を不要にすることが可能な可撓性継手管を提供することを目的とする。 Further, the present invention eliminates the need to use a treatment material dedicated to a fireproof section when constructing a pipeline penetrating a section wall of a medium-to-high-rise building, and eliminates a lot of labor and labor. It is an object of the present invention to provide a possible flexible joint pipe.

本発明に係る可撓製継手管は、可撓管の一端部及び他端部に、相手方配管要素に接続される第１継手及び第２継手が各別に設けられてなる。そして、上記可撓管が、折曲げ変形可能な金属製の波形管でなり、上記第１継手及び上記第２継手が上記可撓管に離脱不能に連結されていると共に、上記可撓管の一端部に設けられた上記第１継手が、上記相手方配管要素に具備された樹脂製の挿し口が挿入される受け口と上記可撓管の一端部に連結された筒状の連結口部とを一体に有し、かつ、上記受け口の内周面を上記挿し口の外周面に熱融着可能な樹脂製の熱融着継手でなる。 The flexible joint pipe according to the present invention is provided with a first joint and a second joint separately connected to a mating piping element at one end and the other end of the flexible pipe. Then, the flexible pipe is made of a metal corrugated pipe that can be bent and deformed, and the first joint and the second joint are connected to the flexible pipe in a detachable manner, and the flexible pipe is connected. The first joint provided at one end provides a socket into which a resin insertion port provided in the mating piping element is inserted and a tubular connecting port connected to one end of the flexible pipe. It is a heat-sealing joint made of resin that is integrally provided and the inner peripheral surface of the receiving port can be heat-sealed to the outer peripheral surface of the insertion port.

また、上記可撓管の一端部と第１継手の上記連結口部との連結箇所において、可撓管を形成している波形管の一端部に具備された直管部が、上記連結口部に挿入状態で水密に結合された金属製のスリーブに挿入されていると共に、このスリーブの内周面と上記直管部の外周面とに摺動可能に密着する水密シール用の弾性リングが、上記直管部に形成された環状の凹入溝に収容されている。Further, at the connecting portion between one end of the flexible pipe and the connecting port of the first joint, the straight pipe portion provided at one end of the corrugated pipe forming the flexible pipe is the connecting port. An elastic ring for a watertight seal that is inserted into a watertightly bonded metal sleeve in the inserted state and slidably adheres to the inner peripheral surface of the sleeve and the outer peripheral surface of the straight pipe portion. It is housed in an annular recessed groove formed in the straight pipe portion.

この発明に係る可撓性継手管は、第１継手及び第２継手が可撓管に離脱不能に連結されていることにより独立した単一の配管要素として取り扱われる。この点で、第１継手及び第２継手が可撓管にただ単に設けられている配管要素とは区別される。ここで、「第１継手及び第２継手が可撓管にただ単に設けられている」の意味は、第１継手又は第２継手と可撓管との連結構造が、ねじ合わせによる連結構造、抜き差し可能な嵌合による連結構造などのように、第１継手及び第２継手が可撓管に対して着脱可能になっている連結構造のことである。 The flexible joint pipe according to the present invention is treated as an independent single pipe element because the first joint and the second joint are irremovably connected to the flexible pipe. In this respect, the first and second joints are distinguished from the piping elements that are simply provided in the flexible pipe. Here, the meaning of "the first joint and the second joint are simply provided in the flexible pipe" means that the connection structure between the first joint or the second joint and the flexible pipe is a connection structure by screwing. It is a connection structure in which the first joint and the second joint are detachable from the flexible pipe, such as a connection structure by fitting that can be inserted and removed.

また、この発明に係る可撓性継手管は、可撓管として、管路が座屈による閉塞を起こすことなく湾曲状やループ状に曲げることが容易で、かつ、許容される曲げ角度の大きなものとして周知されている金属製の波形管を採用している。このため、当該可撓性継手管による管路の取り回しの自由度が格段に向上し、可撓管を所要形状に曲げることによって、可撓管の一端部及び他端部に各別に設けられている第１継手や第２継手の向きを、それらを接続する相手方配管要素の向きに応じて適切にかつ容易に定めることが可能である。したがって、高さや向きの異なる２箇所の相手方配管要素に第１継手及び第２継手を無理なく接続することが可能になる。しかも、高さや向きの異なる２箇所の相手方配管要素に第１継手及び第２継手を接続するときに、可撓管を曲げて他の配管要素を迂回させることも容易に可能になる。さらに、第１継手に熱融着継手を採用したことにより、第１継手を相手方配管要素の挿し口に熱融着するだけで、第１継手と相手方配管要素とを接続することが可能である。したがって、高さや向きの異なる２箇所の相手方配管要素を接続する管路の施工に要する手間及び時間や労力を可及的少なくすることが可能になる。 Further, the flexible joint pipe according to the present invention is a flexible pipe that can be easily bent into a curved shape or a loop shape without causing blockage due to buckling, and has a large allowable bending angle. A metal corrugated tube, which is well known as a product, is used. For this reason, the degree of freedom in maneuvering the pipeline by the flexible joint pipe is remarkably improved, and by bending the flexible pipe into a required shape, it is provided separately at one end and the other end of the flexible pipe. The orientation of the first joint and the second joint can be appropriately and easily determined according to the orientation of the mating piping element connecting them. Therefore, it is possible to connect the first joint and the second joint to the two mating piping elements having different heights and directions without difficulty. Moreover, when connecting the first joint and the second joint to two mating piping elements having different heights and directions, it is possible to easily bend the flexible pipe to bypass the other piping elements. Further, by adopting a heat-sealing joint for the first joint, it is possible to connect the first joint and the mating piping element only by heat-sealing the first joint to the insertion port of the mating piping element. .. Therefore, it is possible to reduce the labor, time, and labor required for the construction of the pipeline connecting the two mating piping elements having different heights and directions as much as possible.

さらに、中高層建築物の区画壁などを貫通する管路を施工する際には、当該可撓性継手管の金属製の波形管でなる可撓管によってその管路を形成すると、可撓管自体が防火性を備える金属製であるために、防火区画専用の処理材を用いる必要性が無くなり、防火区画専用の処理材を用いることに伴う多くの手間と労力が不要になる。 Furthermore, when constructing a pipeline that penetrates a partition wall of a medium-to-high-rise building, if the pipeline is formed by a flexible pipe made of a metal corrugated pipe of the flexible joint pipe, the flexible pipe itself Since is made of metal having fireproof properties, it is not necessary to use a treatment material dedicated to the fireproof section, and a lot of labor and labor associated with using the treatment material dedicated to the fireproof section is not required.

この発明では、上記可撓管の一端部と第１継手の上記連結口部との連結箇所において、可撓管を形成している波形管の一端部に具備された直管部が、上記連結口部に挿入状態で水密に結合された金属製のスリーブに挿入されていると共に、このスリーブの内周面と上記直管部の外周面とに摺動可能に密着する水密シール用の弾性リングが、上記直管部に形成された環状の凹入溝に収容されている、という構成を採用している。これによると、水密シール用の弾性リングが、金属製のスリーブの内周面及び金属製の波形管の直管部の外周面に密着しているので、熱融着継手でなる第１継手に施された融着処理の影響が上記弾性リングの密着箇所に及ばない。そのため、弾性リングによる水密シール性や摺動性の信頼性が損なわれない。また、水密シール用の弾性リングが波形管の一端部に具備された直管部の環状の凹入溝に収容されているために、この弾性リングが位置ずれすることなく定位置で確実な水密シール性を発揮する。 In the present invention, at the connecting portion between one end of the flexible pipe and the connecting port of the first joint, the straight pipe portion provided at one end of the corrugated pipe forming the flexible pipe is connected. An elastic ring for a watertight seal that is inserted into a watertightly bonded metal sleeve that is inserted into the mouth and slidably adheres to the inner peripheral surface of this sleeve and the outer peripheral surface of the straight pipe portion. However, a configuration is adopted in which the pipe is housed in an annular recessed groove formed in the straight pipe portion. According to this, the elastic ring for the watertight seal is in close contact with the inner peripheral surface of the metal sleeve and the outer peripheral surface of the straight pipe portion of the metal corrugated pipe. The effect of the fusion treatment applied does not reach the adhesion portion of the elastic ring. Therefore, the reliability of the watertight sealability and slidability of the elastic ring is not impaired. Further, since the elastic ring for the watertight seal is housed in the annular recessed groove of the straight pipe portion provided at one end of the corrugated pipe, the elastic ring is surely watertight at a fixed position without being displaced. Demonstrates sealing properties.

さらにこの発明では、水密シール用の弾性リングが波形管の一端部に具備された直管部の環状の凹入溝に収容されているために、この弾性リングが位置ずれすることなく定位置で確実な水密シール性を発揮する。 Further, in the present invention, since the elastic ring for the watertight seal is housed in the annular recessed groove of the straight pipe portion provided at one end of the corrugated pipe, the elastic ring is not displaced and is in a fixed position. Demonstrates reliable watertight sealing.

本発明では、上記可撓管の一端部に第１継手の上記連結口部が水密状態で回転可能に連結されていることが望ましい。本発明に係る可撓性継手管がこの構成を有していると、上記した管路の取り回しの自由度がいっそう向上する。特に、熱融着継手である第１継手に具備される電極ピンの向きを、コントローラに接続しやすいように容易に選択することができるようになる。 In the present invention, it is desirable that the connecting port of the first joint is rotatably connected to one end of the flexible pipe in a watertight state. When the flexible joint pipe according to the present invention has this configuration, the degree of freedom in handling the above-mentioned pipe line is further improved. In particular, the orientation of the electrode pins provided in the first joint, which is a heat-sealing joint, can be easily selected so as to be easily connected to the controller.

本発明では、第１継手の上記連結口部と上記受け口との境界箇所に径内方向に突き出た環状の受け面が形成され、上記直管部の先端部を折り返すことによって形成されて径外方向に突き出た鍔形部が上記受け面に軸方向で対向していると共に、上記受け面と上記鍔形部との対向空間に、上記受け面又は上記鍔形部に対して摺動可能な金属製の環状スペーサが上記直管部に外嵌された状態で収容されている、という構成を採用することが望ましい。これによると、可撓管を形成している波形管の直管部に具備された鍔形部が、第１継手の受け面と鍔形部との対向空間に収容されている金属製の環状スペーサに軸方向で係合することにより、第１継手の連結口部からの上記直管部の脱落が確実に防止されるため、第１継手が可撓管に離脱不能に連結される。また、金属製の環状スペーサによって上記受け面と上記鍔形部とが直接に接触することが回避されるため、受け面に鍔形部が擦れて受け面が損傷するという事態が起こらない。 In the present invention, an annular receiving surface protruding in the in-diameter direction is formed at the boundary between the connecting port and the receiving port of the first joint, and is formed by folding back the tip of the straight pipe portion to be out of diameter. The flange-shaped portion protruding in the direction faces the receiving surface in the axial direction, and is slidable with respect to the receiving surface or the flange-shaped portion in the space facing the receiving surface and the collar-shaped portion. It is desirable to adopt a configuration in which a metal annular spacer is housed in a state of being fitted onto the straight pipe portion. According to this, the flange-shaped portion provided in the straight pipe portion of the corrugated pipe forming the flexible pipe is housed in the facing space between the receiving surface of the first joint and the collar-shaped portion, and is made of metal. By engaging with the spacer in the axial direction, the straight pipe portion is surely prevented from falling off from the connecting port portion of the first joint, so that the first joint is irremovably connected to the flexible pipe. Further, since the metal annular spacer prevents the receiving surface and the flange portion from coming into direct contact with each other, the flange portion does not rub against the receiving surface and the receiving surface is not damaged.

本発明に係る別の可撓製継手管は、可撓管の一端部及び他端部に、相手方配管要素に接続される第１継手及び第２継手が各別に設けられてなる可撓性継手管であって、上記可撓管が、折曲げ変形可能な金属製の波形管でなり、上記第１継手及び上記第２継手が上記可撓管に離脱不能に連結されていると共に、上記可撓管の一端部に設けられた上記第１継手が、上記相手方配管要素に具備された樹脂製の挿し口が挿入される受け口と上記可撓管の一端部に連結された筒状の連結口部とを一体に有し、かつ、上記受け口の内周面を上記挿し口の外周面に熱融着可能な樹脂製の熱融着継手でなり、上記可撓管の一端部と第１継手の上記連結口部との連結箇所において、可撓管を形成している波形管の一端部に具備された直管部が上記連結口部に挿入されていると共に、この連結口部の内周面と上記直管部の外周面とに摺動可能に密着する水密シール用の弾性リングが、上記直管部に形成された環状の凹入溝に収容され、第１継手の上記連結口部と上記受け口との境界箇所に径内方向に突き出た環状の受け面が形成され、上記直管部の先端部を折り返すことによって形成されて径外方向に突き出た鍔形部が上記受け面に軸方向で対向していると共に、上記受け面と上記鍔形部との対向空間に、上記受け面又は上記鍔形部に対して摺動可能な金属製の環状スペーサが上記直管部に外嵌された状態で収容されている。 Another flexible joint pipe according to the present invention is a flexible joint in which a first joint and a second joint connected to a mating pipe element are separately provided at one end and the other end of the flexible pipe. The flexible pipe is a corrugated metal pipe that can be bent and deformed, and the first joint and the second joint are irremovably connected to the flexible pipe, and the flexible pipe is possible. The first joint provided at one end of the flexible pipe is a tubular connecting port connected to a receiving port into which a resin insertion port provided in the mating piping element is inserted and one end of the flexible pipe. It is a resin heat-sealing joint that has a portion integrally and the inner peripheral surface of the receiving port can be heat-sealed to the outer peripheral surface of the insertion port. A straight pipe portion provided at one end of a corrugated pipe forming a flexible pipe is inserted into the connecting port portion at the connecting portion with the connecting port portion, and the inner circumference of the connecting port portion is inserted. An elastic ring for a watertight seal that slidably adheres to the surface and the outer peripheral surface of the straight pipe portion is housed in an annular recessed groove formed in the straight pipe portion, and the connecting port portion of the first joint is provided. An annular receiving surface protruding inward in the radial direction is formed at the boundary between the receiving port and the receiving port, and a flange-shaped portion formed by folding back the tip of the straight pipe portion and protruding in the outward diameter direction is formed on the receiving surface. A metal annular spacer that faces the receiving surface in the axial direction and is slidable with respect to the receiving surface or the flange portion is outside the straight pipe portion in the facing space between the receiving surface and the flange portion. It is housed in a fitted state.

この発明の構成は、上記したスリーブを省略した上で、可撓管の一端部と第１継手の連結口部との連結箇所において、可撓管を形成している波形管の一端部に具備された直管部が連結口部に挿入され、この連結口部の内周面と直管部の外周面とに摺動可能に密着する水密シール用のＯリングを、直管部に形成された環状の凹入溝に収容した、ものに相当している。この発明においても、上記可撓管の一端部に第１継手の上記連結口部が水密状態で回転可能に連結されていることが望ましい。The configuration of the present invention is provided at one end of the corrugated pipe forming the flexible pipe at the connecting portion between one end of the flexible pipe and the connecting port of the first joint, while omitting the sleeve described above. The straight pipe portion is inserted into the connecting port portion, and an O-ring for a watertight seal that slidably adheres to the inner peripheral surface of the connecting port portion and the outer peripheral surface of the straight pipe portion is formed in the straight pipe portion. It corresponds to the one housed in the annular recessed groove. Also in the present invention, it is desirable that the connecting port of the first joint is rotatably connected to one end of the flexible pipe in a watertight state.

以上のように、本発明に係る可撓性継手管によると、高さや向きの異なる接続口同士を他の配管要素が混在する狭い配管スペース内で接続する際に、継手や接続短管といった配管要素の必要数を最少限度に抑えられ、しかも、熱融着継手の受け口と相手方配管要素の挿し口との融着箇所の数も可及的少なく抑えることが可能になる。また、中高層建築物の区画壁などを貫通する管路を施工する際に、防火区画専用の処理材を用いることの必要性を無くすることが可能である。このため、防火区画専用の処理材を用いることに伴う多くの手間と労力が不要になるという効果も奏される。 As described above, according to the flexible joint pipe according to the present invention, when connecting connection ports having different heights and directions in a narrow pipe space in which other pipe elements are mixed, pipes such as joints and connecting short pipes are used. The required number of elements can be minimized, and the number of fusion points between the receiving port of the heat-sealing joint and the insertion port of the mating piping element can be suppressed as small as possible. In addition, it is possible to eliminate the need to use a treatment material dedicated to the fire protection section when constructing a pipeline that penetrates the section wall of a medium-to-high-rise building. For this reason, there is also an effect that a lot of labor and labor associated with using a treatment material dedicated to the fire protection section is not required.

本発明の実施形態に係る可撓性継手管の一部省略側面図である。It is a partially omitted side view of the flexible joint pipe which concerns on embodiment of this invention. 図１の可撓性継手管を曲げた状態の一例を示した一部省略側面図である。It is a partially omitted side view which showed an example of the state in which the flexible joint pipe of FIG. 1 was bent. 図１の可撓管と第１継手との連結構造を示した部分縦断側面図である。It is a partial longitudinal side view which showed the connection structure of the flexible pipe of FIG. 1 and a 1st joint. 図１の可撓管と第２継手との連結構造を示した部分縦断側面図である。It is a partial longitudinal side view which showed the connection structure of the flexible pipe of FIG. 1 and the 2nd joint. 本発明の他の実施形態に係る可撓性継手管Ａの一部省略側面図である。It is a partially omitted side view of the flexible joint pipe A which concerns on other embodiment of this invention. 図５の可撓性継手管に採用されている可撓管と第１継手との連結構造を示した部分縦断側面図である。It is a partial longitudinal side view which showed the connection structure of the flexible pipe used for the flexible joint pipe of FIG. 5 and the first joint. 図１の可撓性継手管Ａを採用した配管系を例示した説明図である。It is explanatory drawing which illustrated the piping system which adopted the flexible joint pipe A of FIG. 図１の可撓性継手管を採用した他の配管系を例示した説明図である。It is explanatory drawing which illustrated the other piping system which adopted the flexible joint pipe of FIG. 従来例による配管系を例示した説明図である。It is explanatory drawing which illustrated the piping system by the conventional example.

図１は本発明の実施形態に係る可撓性継手管Ａの一部省略側面図、図２は図１の可撓性継手管Ａを曲げた状態の一例を示した一部省略側面図である。 FIG. 1 is a partially omitted side view of the flexible joint pipe A according to the embodiment of the present invention, and FIG. 2 is a partially omitted side view showing an example of a state in which the flexible joint pipe A of FIG. 1 is bent. is there.

図１の可撓性継手管Ａは、可撓管１０の一端部及び他端部に、相手方配管要素（不図示）に接続される第１継手２０及び第２継手５０が各別に離脱不能に設けられてなる。このように第１継手２０及び第２継手５０が可撓管１０に離脱不能に連結されていると、当該可撓性継手管Ａが独立した単一の配管要素として取り扱われる。この点で、第１継手及び第２継手が可撓管にただ単に設けられている配管要素とは区別される。第１継手２０及び第２継手５０を可撓管１０に対して離脱不能にするために採用されている具体的構成については後述する。 In the flexible joint pipe A of FIG. 1, the first joint 20 and the second joint 50 connected to the mating piping element (not shown) cannot be separated from each other at one end and the other end of the flexible pipe 10. It is provided. When the first joint 20 and the second joint 50 are irremovably connected to the flexible pipe 10 in this way, the flexible joint pipe A is treated as an independent single piping element. In this respect, the first and second joints are distinguished from the piping elements that are simply provided in the flexible pipe. The specific configuration adopted to make the first joint 20 and the second joint 50 inseparable from the flexible pipe 10 will be described later.

可撓管１０は折曲げ変形可能な金属製、具体的には、耐食性に富むステンレス製の波形管壁を備える波形管でなる。この種の波形管は、フレキシブルパイプとも称されていて、リング状の凹部と凸部が交互に並んで形成された波形管壁を持つものや、螺旋状に連続する凹部又は凸部を有する波形管壁をもつもの、などが知られている。ステンレス製の波形管壁を備える波形管によって形成された可撓管１０は、当該可撓管１０によって形成される管路が座屈による閉塞を起こすことなく湾曲状やループ状に人力等で曲げることが容易であり、許容される曲げ角度を大きく確保することも容易である。可撓管１０の長さは、施工箇所で要求される管路の長さに応じて、たとえば１０〜５０ｃｍ程度に定められている。中高層建築物の配管スペース内や区画壁の貫通孔に配備される水用配管に用いられる可撓性継手管Ａの可撓管１０では、たとえば、管壁厚さが１ｍｍ以内の波形管の山部外径が２０〜３０ｍｍ、谷部外径が２０〜２５ｍｍ、山部外径と谷部外径との寸法差が２〜４ｍｍ程度に定まっているものが多い。長さ、管壁厚さ、波形管の山部外径、谷部外径、山部外径と谷部外径との寸法差が上記の範囲に収まっている可撓管１０では、図２に例示したように、１８０度を超える角度に湾曲状又はループ状に曲げた状態でも、可撓管１０によって形成されている管路（内部空間）が座屈して閉塞されるという事態が起こらず、また、管路の口径が縮小することもほとんどない。可撓管１０のの長さは上記した範囲に限定されるものではなく、必要に応じて上記範囲より長くされる場合もある。また、可撓管１０の管壁厚さや山部外径、谷部外径、山部外径と谷部外径との寸法差も上記各範囲に限定されないことは勿論である。 The flexible tube 10 is made of a metal that can be bent and deformed, specifically, a corrugated tube having a corrugated tube wall made of stainless steel having excellent corrosion resistance. This type of corrugated pipe is also called a flexible pipe, and has a corrugated pipe wall formed by alternately arranging ring-shaped concave portions and convex portions, or a corrugated pipe having spirally continuous concave or convex portions. Those with a tube wall are known. The flexible tube 10 formed of a corrugated tube provided with a stainless steel corrugated tube wall is manually bent into a curved or loop shape without causing blockage due to buckling in the conduit formed by the flexible tube 10. It is easy to do so, and it is also easy to secure a large allowable bending angle. The length of the flexible pipe 10 is set to, for example, about 10 to 50 cm, depending on the length of the pipe line required at the construction site. In the flexible pipe 10 of the flexible joint pipe A used for water pipes installed in the pipe space of a middle-high-rise building or in a through hole of a partition wall, for example, a pile of corrugated pipes having a pipe wall thickness of 1 mm or less. In many cases, the outer diameter of the part is 20 to 30 mm, the outer diameter of the valley is 20 to 25 mm, and the dimensional difference between the outer diameter of the peak and the outer diameter of the valley is about 2 to 4 mm. In the flexible pipe 10 in which the length, the pipe wall thickness, the peak outer diameter of the corrugated pipe, the valley outer diameter, and the dimensional difference between the peak outer diameter and the valley outer diameter are within the above ranges, FIG. As illustrated in the above, even when the pipe is bent in a curved or loop shape at an angle exceeding 180 degrees, the pipe line (internal space) formed by the flexible pipe 10 does not buckle and become blocked. Also, the diameter of the pipeline is rarely reduced. The length of the flexible tube 10 is not limited to the above range, and may be longer than the above range if necessary. Further, it goes without saying that the pipe wall thickness of the flexible pipe 10, the peak outer diameter, the valley outer diameter, and the dimensional difference between the peak outer diameter and the valley outer diameter are not limited to the above ranges.

図３は可撓管１０と第１継手２０との連結構造を示した部分縦断側面図、図４は可撓管１０と第２継手５０との連結構造を示した部分縦断側面図である。 FIG. 3 is a partial longitudinal side view showing the connecting structure of the flexible pipe 10 and the first joint 20, and FIG. 4 is a partial longitudinal side view showing the connecting structure of the flexible pipe 10 and the second joint 50.

図３のように、第１継手２０は、ソケット型の受け口２１と筒状の連結口部２２とを同軸上に一体に有していて、これらが熱可塑性樹脂であるポリエチレンによって一体に成形されている。この第１継手２０は熱融着継手（ＥＦ継手）である。そのため、受け口２１には、電熱線２３が埋め込まれていると共に、この電熱線２３に通電するための電極ピン２４，２４や溶融状態を検出するためのインジケータ２５などが備わっている。また、連結口部２２の外周には、熱融着時の膨張を抑制することに役立つ締付け用リング２６が巻き付けられている。 As shown in FIG. 3, the first joint 20 has a socket-type receiving port 21 and a tubular connecting port 22 coaxially integrally, and these are integrally formed of polyethylene, which is a thermoplastic resin. ing. The first joint 20 is a heat fusion joint (EF joint). Therefore, the receiving port 21 is provided with an electrode pin 24, 24 for energizing the heating wire 23, an indicator 25 for detecting a molten state, and the like, as well as an embedded heating wire 23. Further, a tightening ring 26 useful for suppressing expansion at the time of heat fusion is wound around the outer periphery of the connecting port portion 22.

可撓管１０の一端部と第１継手２０の連結口部２２との連結箇所には、連結口部２２に挿入状態で水密に離脱不能に結合された金属製のスリーブ３０が設けられている。また、可撓管１０を形成している波形管の一端部に直管部１１が具備されていて、この直管部１１がスリーブ３０に挿入されていると共に、このスリーブ３０の内周面と上記直管部１１の外周面とに摺動可能に密着する水密シール用の弾性リングであるＯリング４０が、上記直管部１１に形成された環状の凹入溝１３に収容されている。凹入溝１３の溝形面は直管部１１の外周面でもある。この構成により、第１継手２０が可撓管１０に対して水密に結合され、しかも、第１継手２０が可撓管１０に対して軸線周りで回転可能になっている。図例では、２つの水密シール用のＯリング４０が、スリーブ３０の内周面と直管部１１の外周面とに軸方向２箇所で摺動可能に密着しているけれども、１つの水密シール用のＯリング４０を、スリーブ３０の内周面と直管部１１の外周面とに１箇所で摺動可能に密着させておいてもよい。 At the connecting portion between one end of the flexible pipe 10 and the connecting port 22 of the first joint 20, a metal sleeve 30 is provided which is watertightly and inseparably connected to the connecting port 22 in an inserted state. .. Further, a straight pipe portion 11 is provided at one end of the corrugated pipe forming the flexible pipe 10, and the straight pipe portion 11 is inserted into the sleeve 30 and is connected to the inner peripheral surface of the sleeve 30. An O-ring 40, which is an elastic ring for a watertight seal that is slidably adhered to the outer peripheral surface of the straight pipe portion 11, is housed in an annular recessed groove 13 formed in the straight pipe portion 11. The groove-shaped surface of the recessed groove 13 is also the outer peripheral surface of the straight pipe portion 11. With this configuration, the first joint 20 is watertightly coupled to the flexible pipe 10, and the first joint 20 is rotatable about the axis with respect to the flexible pipe 10. In the illustrated example, two O-rings 40 for watertight seals are slidably adhered to the inner peripheral surface of the sleeve 30 and the outer peripheral surface of the straight pipe portion 11 at two points in the axial direction, but one watertight seal. The O-ring 40 for use may be slidably brought into close contact with the inner peripheral surface of the sleeve 30 and the outer peripheral surface of the straight pipe portion 11 at one location.

さらに、図３に併記した部分拡大図によって判るように、第１継手２０の連結口部２２と受け口２１との境界箇所には、スリーブ３０の端面に密着した環状の突出部２７が設けられていて、この突出部２７の片面が、径内方向に突き出た環状の受け面２８として形成されている。これに対して、上記直管部１１の一端側の先端部を折り返すことによって形成されて径外方向に突き出た鍔形部１４が上記受け面２８に軸方向で対向している。そして、上記受け面２８と上記鍔形部１４との対向空間に、それらの受け面２８と鍔形部１４とに対して摺動可能な金属製の環状スペーサ１５が、上記直管部１１に外嵌された状態で収容されている。 Further, as can be seen from the partially enlarged view also shown in FIG. 3, an annular protrusion 27 that is in close contact with the end surface of the sleeve 30 is provided at the boundary between the connecting port 22 and the receiving port 21 of the first joint 20. One side of the protruding portion 27 is formed as an annular receiving surface 28 protruding in the inward direction. On the other hand, the flange-shaped portion 14 formed by folding back the tip end portion on one end side of the straight pipe portion 11 and projecting in the out-of-diameter direction faces the receiving surface 28 in the axial direction. Then, in the space facing the receiving surface 28 and the flange portion 14, a metal annular spacer 15 slidable with respect to the receiving surface 28 and the flange portion 14 is provided on the straight pipe portion 11. It is housed in an externally fitted state.

図３を参照して説明した可撓管１０と第１継手２０との連結構造によると、水密シール用のＯリング４０が、金属製のスリーブ３０の内周面及び金属製の波形管の直管部１１の外周面（溝形面）に密着しているので、熱融着継手でなる第１継手２０に施された融着処理に伴う膨張又は収縮の影響がＯリング４０の密着箇所に及ばない。そのため、Ｏリング４０による水密シール性や摺動性の信頼性が損なわれない。また、水密シール用のＯリング４０が波形管の一端部に具備された直管部１１の環状の凹入溝１３に収容されているために、このＯリング４０が位置ずれすることなく定位置で確実な水密シール性を発揮する。さらに、可撓管１０を形成している波形管の直管部１１に具備された鍔形部１４が、第１継手２０の受け面２８と鍔形部１４との対向空間に収容されている金属製の環状スペーサ１５に軸方向で係合することにより、第１継手２０の連結口部２２からの上記直管部１１の脱落が確実に防止され、しかも、可撓管１０に対して第１継手２０が離脱不能になる。また、金属製の環状スペーサ１５によって、上記受け面２８と上記鍔形部１４とが直接に接触することが回避されるため、第１継手２０を回転させても、合成樹脂製である受け面２８に鍔形部１４が擦れたり、噛み付いたりして受け面２８が損傷するという事態が起こらず、スムーズに回転させることが可能となる。さらに、第１継手２０に相手方配管要素である挿し口を（不図示）を差し込んで熱融着処理を行うと、挿し口は、その端面が上記鍔形部１４に突き合わされた状態で受け口２１と溶融して一体化する。この場合、受け面２８と鍔形部１４との相互間の隙間が溶融樹脂によって埋まることにより、水密性能が高まるという利点がある。 According to the connecting structure of the flexible pipe 10 and the first joint 20 described with reference to FIG. 3, the O-ring 40 for the watertight seal is directly on the inner peripheral surface of the metal sleeve 30 and the metal corrugated pipe. Since it is in close contact with the outer peripheral surface (grooved surface) of the pipe portion 11, the influence of expansion or contraction due to the fusion treatment applied to the first joint 20 made of the heat-sealing joint is exerted on the close contact portion of the O-ring 40. Not as good as that. Therefore, the reliability of the watertight sealability and slidability of the O-ring 40 is not impaired. Further, since the O-ring 40 for watertight sealing is housed in the annular recessed groove 13 of the straight pipe portion 11 provided at one end of the corrugated pipe, the O-ring 40 is not displaced and is in a fixed position. Demonstrates reliable watertight sealing. Further, a flange-shaped portion 14 provided in the straight pipe portion 11 of the corrugated pipe forming the flexible pipe 10 is housed in a space facing the receiving surface 28 of the first joint 20 and the flange-shaped portion 14. By engaging with the metal annular spacer 15 in the axial direction, the straight pipe portion 11 is surely prevented from falling off from the connecting port portion 22 of the first joint 20, and moreover, the flexible pipe 10 is the second 1 The joint 20 becomes inseparable. Further, since the metal annular spacer 15 prevents the receiving surface 28 and the flange portion 14 from coming into direct contact with each other, even if the first joint 20 is rotated, the receiving surface is made of synthetic resin. The flange portion 14 does not rub against or bite the 28, and the receiving surface 28 is not damaged, so that the bearing surface 28 can be rotated smoothly. Further, when a heat fusion treatment is performed by inserting an insertion port (not shown), which is a mating piping element, into the first joint 20, the insertion port has a receiving port 21 with its end face abutted against the flange portion 14. Melts and integrates with. In this case, there is an advantage that the watertightness performance is improved by filling the gap between the receiving surface 28 and the flange portion 14 with the molten resin.

さらに、図３に示した連結構造では、可撓管１０を形成している波形管の一端側の１つの山形部１６と鍔形部１４とによって上記したスリーブ３０と環状スペーサ１５とが挟まれている。このため、第１継手２０が可撓管１０に対して軸方向に位置ずれするという事態が起こらない。 Further, in the connecting structure shown in FIG. 3, the sleeve 30 and the annular spacer 15 are sandwiched between one chevron portion 16 and a collar-shaped portion 14 on one end side of the corrugated tube forming the flexible tube 10. ing. Therefore, the situation in which the first joint 20 is displaced in the axial direction with respect to the flexible pipe 10 does not occur.

図４のように、第２継手５０は金属製で、テーパ雄ねじ５１を有している。可撓管１０の他端部と第２継手５０との連結箇所では、可撓管１０を形成している波形管の他端部に具備された直管部１７が第２継手５０に挿入されていると共に、直管部１７の他端側の先端部を折り返すことによって形成されて径外方向に突き出た鍔形部１８が第２継手５０の先端面に対峙している。この構成により、第２継手５０が可撓管１０に離脱不能に連結される。また、直管部１７に形成された環状の凹入溝１９に収容されているＯリング６１が第２継手５０の内周面と直管部１７の外周面とに摺動可能に密着し、さらに、直管部１７に形成された環状の膨出部１９ａと第２継手５０の内周面に形成された環状の凹入溝５６との対向空間にもＯリング６２が収容されていて、このＯリング６２が直管部１７の外周面と第２継手５０の内周面とに摺動可能に密着している。凹入溝５６の溝形面や膨出部１９ａの外周面も直管部１７の外周面である。 As shown in FIG. 4, the second joint 50 is made of metal and has a tapered male screw 51. At the connection point between the other end of the flexible pipe 10 and the second joint 50, a straight pipe portion 17 provided at the other end of the corrugated pipe forming the flexible pipe 10 is inserted into the second joint 50. At the same time, a flange-shaped portion 18 formed by folding back the tip end portion on the other end side of the straight pipe portion 17 and projecting in the out-diameter direction faces the tip end surface of the second joint 50. With this configuration, the second joint 50 is irremovably connected to the flexible pipe 10. Further, the O-ring 61 housed in the annular recessed groove 19 formed in the straight pipe portion 17 slidably adheres to the inner peripheral surface of the second joint 50 and the outer peripheral surface of the straight pipe portion 17. Further, the O-ring 62 is also housed in the space facing the annular bulging portion 19a formed in the straight pipe portion 17 and the annular recessed groove 56 formed in the inner peripheral surface of the second joint 50. The O-ring 62 is slidably adhered to the outer peripheral surface of the straight pipe portion 17 and the inner peripheral surface of the second joint 50. The groove-shaped surface of the recessed groove 56 and the outer peripheral surface of the bulging portion 19a are also the outer peripheral surfaces of the straight pipe portion 17.

図４に示した連結構造では、直管部１７に形成された環状の膨出部１９ａと第２継手５０の内周面に形成された環状の凹入溝５６とが嵌合し、かつ、可撓管１０を形成している波形管の他端側の直管部１７に形成されている鍔形部１８が第２継手５０の先端面に対峙していることにより、第２継手５０が可撓管１０に対して軸方向に位置ずれするという事態が抑制されている。 In the connecting structure shown in FIG. 4, the annular bulging portion 19a formed in the straight pipe portion 17 and the annular recessed groove 56 formed in the inner peripheral surface of the second joint 50 are fitted and formed. The flanged portion 18 formed on the straight pipe portion 17 on the other end side of the corrugated pipe forming the flexible pipe 10 faces the tip surface of the second joint 50, so that the second joint 50 is formed. The situation where the position shifts in the axial direction with respect to the flexible pipe 10 is suppressed.

図５は本発明の他の実施形態に係る可撓性継手管Ａの一部省略側面図、図６は図５の可撓性継手管Ａに採用されている可撓管１０と第１継手２０との連結構造を示した部分縦断側面図である。 FIG. 5 is a partially omitted side view of the flexible joint pipe A according to another embodiment of the present invention, and FIG. 6 shows the flexible pipe 10 and the first joint used in the flexible joint pipe A of FIG. It is a partial longitudinal side view which showed the connection structure with 20.

図５に示した他の実施形態に係る可撓性継手管Ａにおいて、図１に示した可撓性継手管Ａと異なる点は、第２継手５０に熱融着継手を採用している点だけである。また、図６に示した可撓管１０と第１継手２０との連結構造では、図３の連結構造に採用されているスリーブ３０を省略した上で、可撓管１０の一端部と第１継手２０の連結口部２２との連結箇所において、可撓管１０を形成している波形管の一端部に具備された直管部１１が連結口部２２に挿入され、この連結口部２２の内周面と直管部１１の外周面とに摺動可能に密着する水密シール用のＯリング４０が、直管部１１に形成された環状の凹入溝１３に収容されている、という点で相違している。また、この実施形態では、連結口部２２の外周に巻き付けられている締付け用リング２６の巻き付け箇所が、上記した水密シール用のＯリング４０の設置箇所の外側に定められている。締付け用リング２６の巻き付け箇所をこのように定めておくと、締付けリング２６が熱融着時の連結口部２２の膨張を抑制することに役立つために、水密シール用のＯリング４０と連結口部２２の内周面との密着性が熱融着処理よって妨げられにくくなるという利点がある。その他の点は、図１に示したものとほぼ同一であるので、同一又は相応する要素に同一符号を付すことによって説明が重複することを回避する。 The flexible joint pipe A according to the other embodiment shown in FIG. 5 differs from the flexible joint pipe A shown in FIG. 1 in that a heat-sealed joint is used for the second joint 50. Only. Further, in the connecting structure of the flexible pipe 10 and the first joint 20 shown in FIG. 6, one end of the flexible pipe 10 and the first one are omitted after omitting the sleeve 30 adopted in the connecting structure of FIG. At the connecting portion of the joint 20 with the connecting port portion 22, a straight pipe portion 11 provided at one end of the corrugated pipe forming the flexible pipe 10 is inserted into the connecting port portion 22, and the connecting port portion 22 The point that the O-ring 40 for a watertight seal that is slidably adhered to the inner peripheral surface and the outer peripheral surface of the straight pipe portion 11 is housed in the annular recessed groove 13 formed in the straight pipe portion 11. Is different. Further, in this embodiment, the winding portion of the tightening ring 26 wound around the outer periphery of the connecting port portion 22 is defined outside the installation location of the O-ring 40 for the watertight seal described above. When the winding location of the tightening ring 26 is determined in this way, the tightening ring 26 helps to suppress the expansion of the connecting port 22 at the time of heat fusion, so that the O-ring 40 for the watertight seal and the connecting port are connected. There is an advantage that the adhesion of the portion 22 to the inner peripheral surface is less likely to be hindered by the heat fusion treatment. Since the other points are almost the same as those shown in FIG. 1, the same or corresponding elements are designated by the same reference numerals to avoid duplication of description.

次に、図１を参照して説明した可撓性継手管Ａを採用した配管系を説明する。図７は同配管系を例示した説明図である。同図は、マンションなどの中高層建築物のパイプスペース（ＰＳ）と呼ばれる配管スペース内で立て管１００と水道メータ２００とを接続している配管系を示している。同図のように、この配管系では、立て管１００に介在されたＴ形分岐継手１１１の横向き接続口１１２とＴ形分岐継手１１１よりも低位に設置された水道メータ２００の横向き接続口２０１とが、上記可撓性継手管Ａを用いて接続されている。すなわち、この配管系では、Ｔ形分岐継手１１１の横向き接続口１１２によって形成されている挿し口が、可撓性継手管Ａの熱融着継手でなる第１継手２０の受け口２１に挿入されていて、それらの挿し口と受け口２１とが融着により一体化されている。また、第２継手５０が、水道メータ２００の横向き接続口２０１にねじ結合によって接続されている。さらに、可撓管１０を曲げることによって、第１継手２０や第２継手５０の向きを、相手方配管要素であるＴ形分岐継手１１１の横向き接続口１１２によって形成されている挿し口や水道メータ２００の横向き接続口２０１の向きに合わせている。このため、高さや向きの異なる２箇所の相手方配管要素であるＴ形分岐継手１１１の横向き接続口１１２（挿し口）や水道メータ２００の横向き接続口２０１が、独立した単一の可撓性継手管Ａによって無理なく接続されている。 Next, a piping system using the flexible joint pipe A described with reference to FIG. 1 will be described. FIG. 7 is an explanatory diagram illustrating the same piping system. The figure shows a piping system connecting a vertical pipe 100 and a water meter 200 in a piping space called a pipe space (PS) of a medium-to-high-rise building such as an apartment. As shown in the figure, in this piping system, the horizontal connection port 112 of the T-shaped branch joint 111 interposed in the vertical pipe 100 and the horizontal connection port 201 of the water meter 200 installed lower than the T-shaped branch joint 111. Are connected using the flexible joint pipe A. That is, in this piping system, the insertion port formed by the lateral connection port 112 of the T-shaped branch joint 111 is inserted into the receiving port 21 of the first joint 20 which is the heat-sealing joint of the flexible joint pipe A. Therefore, the insertion port and the receiving port 21 are integrated by fusion. Further, the second joint 50 is connected to the sideways connection port 201 of the water meter 200 by a screw connection. Further, by bending the flexible pipe 10, the orientation of the first joint 20 and the second joint 50 is changed to the insertion port and the water meter 200 formed by the lateral connection port 112 of the T-shaped branch joint 111 which is the mating piping element. It is aligned with the orientation of the sideways connection port 201. For this reason, the horizontal connection port 112 (insertion port) of the T-shaped branch joint 111 and the horizontal connection port 201 of the water meter 200, which are two mating piping elements having different heights and directions, are independent single flexible joints. It is reasonably connected by pipe A.

図８は可撓性継手管Ａを採用した他の配管系を例示している。この事例では、他の配管要素（配管、枠組み、機器など）１２０，１２１を迂回するように可撓管１０を曲げて可撓性継手管Ａを施工している。このように、可撓性継手管Ａを用いることによって他の配管要素１２０，１２１を迂回させることも容易に可能になる。さらに、第１継手５０に熱融着継手を採用したことにより、第１継手２０を相手方配管要素であるＴ形分岐継手１１１の横向き接続口１１２によって形成されている挿し口に熱融着するだけで、第１継手２０とＴ形分岐継手１１１とを接続しているので、管路の施工に要する手間及び時間や労力が可及的少なくて済む。 FIG. 8 illustrates another piping system in which the flexible joint pipe A is adopted. In this case, the flexible joint pipe A is constructed by bending the flexible pipe 10 so as to bypass other piping elements (pipes, frameworks, equipment, etc.) 120 and 121. In this way, by using the flexible joint pipe A, it is possible to easily bypass the other piping elements 120 and 121. Further, by adopting the heat fusion joint for the first joint 50, the first joint 20 is only heat-sealed to the insertion port formed by the lateral connection port 112 of the T-shaped branch joint 111 which is the mating piping element. Since the first joint 20 and the T-shaped branch joint 111 are connected to each other, the labor, time, and labor required for the construction of the pipeline can be reduced as much as possible.

この実施形態のように、第１継手２０が可撓管１０に対して回転可能になっていると、熱融着継手でなる第１継手２０の電極ピン２４（図３参照）を、熱融着のためのコントローラに接続しやすい向きに容易に定めることができるという利点もある。 When the first joint 20 is rotatable with respect to the flexible pipe 10 as in this embodiment, the electrode pin 24 (see FIG. 3) of the first joint 20 formed of the heat-sealing joint is heat-melted. There is also the advantage that it can be easily determined in a direction that makes it easy to connect to the controller for wearing.

ところで、中高層建築物の区画壁などを貫通する管路を施工する際には、当該可撓性継手管Ａの金属製の波形管でなる可撓管１０によってその管路を形成することが可能であるので、そのようにすることにより、金属製の波形管でなる可撓管１０自体が備える防火性が有効に利用される。したがって、防火区画専用の処理材を用いる必要性が無くなり、防火区画専用の処理材を用いることに伴う多くの手間と労力が不要になる。 By the way, when constructing a pipeline penetrating a partition wall of a middle-high-rise building, it is possible to form the pipeline by a flexible pipe 10 made of a metal corrugated pipe of the flexible joint pipe A. Therefore, by doing so, the fire resistance of the flexible pipe 10 itself made of a metal corrugated pipe is effectively utilized. Therefore, there is no need to use a treatment material dedicated to the fire protection zone, and a lot of labor and labor associated with using the treatment material dedicated to the fire protection compartment is not required.

図５を参照して説明した他の実施形態に係る可撓性継手管Ａについても上記に準じた施工が可能である。 The flexible joint pipe A according to the other embodiment described with reference to FIG. 5 can also be constructed according to the above.

Ａ可撓性継手管
１０可撓管
１１，１７直管部
１３，１９凹入溝
１４，１８鍔形部
１５環状スペーサ
２０第１継手
２１受け口
２２連結口部
２８受け面
３０スリーブ
５０第２継手
４０Ｏリング A Flexible joint pipe 10 Flexible pipe 11,17 Straight pipe part 13,19 Recessed groove 14,18 collared part 15 O-ring spacer 20 First joint 21 Receiving port 22 Connecting port 28 Receiving surface 30 Sleeve 50 Second joint 40 O-ring

Claims

可撓管の一端部及び他端部に、相手方配管要素に接続される第１継手及び第２継手が各別に設けられてなる可撓性継手管であって、
上記可撓管が、折曲げ変形可能な金属製の波形管でなり、
上記第１継手及び上記第２継手が上記可撓管に離脱不能に連結されていると共に、上記可撓管の一端部に設けられた上記第１継手が、上記相手方配管要素に具備された樹脂製の挿し口が挿入される受け口と上記可撓管の一端部に連結された筒状の連結口部とを一体に有し、かつ、上記受け口の内周面を上記挿し口の外周面に熱融着可能な樹脂製の熱融着継手でなり、
上記可撓管の一端部と第１継手の上記連結口部との連結箇所において、可撓管を形成している波形管の一端部に具備された直管部が、上記連結口部に挿入状態で水密に結合された金属製のスリーブに挿入されていると共に、このスリーブの内周面と上記直管部の外周面とに摺動可能に密着する水密シール用の弾性リングが、上記直管部に形成された環状の凹入溝に収容されていることを特徴とする可撓性継手管。 A flexible joint pipe in which a first joint and a second joint connected to a mating piping element are separately provided at one end and the other end of the flexible pipe.
The flexible tube is a metal corrugated tube that can be bent and deformed.
The first joint and the second joint are irremovably connected to the flexible pipe, and the first joint provided at one end of the flexible pipe is a resin provided in the mating piping element. The socket into which the plastic insertion port is inserted and the tubular connecting port portion connected to one end of the flexible pipe are integrally provided, and the inner peripheral surface of the socket is formed on the outer peripheral surface of the insertion port. Ri such heat-sealable resin thermally fused joint,
At the connecting portion between one end of the flexible pipe and the connecting port of the first joint, a straight pipe portion provided at one end of the corrugated pipe forming the flexible pipe is inserted into the connecting port. An elastic ring for a watertight seal, which is inserted into a watertightly bonded metal sleeve in a state and slidably adheres to the inner peripheral surface of the sleeve and the outer peripheral surface of the straight pipe portion, is directly attached. A flexible joint pipe characterized in that it is housed in an annular recessed groove formed in the pipe portion.

上記可撓管の一端部に第１継手の上記連結口部が水密状態で回転可能に連結されている請求項１に記載した可撓性継手管。 The flexible joint pipe according to claim 1, wherein the connection port portion of the first joint is rotatably connected to one end of the flexible pipe in a watertight state.

第１継手の上記連結口部と上記受け口との境界箇所に径内方向に突き出た環状の受け面が形成され、上記直管部の先端部を折り返すことによって形成されて径外方向に突き出た鍔形部が上記受け面に軸方向で対向していると共に、上記受け面と上記鍔形部との対向空間に、上記受け面又は上記鍔形部に対して摺動可能な金属製の環状スペーサが上記直管部に外嵌された状態で収容されている請求項１又は請求項２に記載した可撓性継手管。 An annular receiving surface protruding in the in-diameter direction is formed at the boundary between the connecting port and the receiving port of the first joint, and is formed by folding back the tip of the straight pipe and protruding in the out-diameter direction. The flange-shaped portion faces the receiving surface in the axial direction, and a metal ring that is slidable with respect to the receiving surface or the flange-shaped portion in the space facing the receiving surface and the flange-shaped portion. The flexible joint pipe according to claim 1 or 2 , wherein the spacer is housed in a state of being fitted onto the straight pipe portion.

可撓管の一端部及び他端部に、相手方配管要素に接続される第１継手及び第２継手が各別に設けられてなる可撓性継手管であって、
上記可撓管が、折曲げ変形可能な金属製の波形管でなり、
上記第１継手及び上記第２継手が上記可撓管に離脱不能に連結されていると共に、上記可撓管の一端部に設けられた上記第１継手が、上記相手方配管要素に具備された樹脂製の挿し口が挿入される受け口と上記可撓管の一端部に連結された筒状の連結口部とを一体に有し、かつ、上記受け口の内周面を上記挿し口の外周面に熱融着可能な樹脂製の熱融着継手でなり、
上記可撓管の一端部と第１継手の上記連結口部との連結箇所において、可撓管を形成している波形管の一端部に具備された直管部が上記連結口部に挿入されていると共に、この連結口部の内周面と上記直管部の外周面とに摺動可能に密着する水密シール用の弾性リングが、上記直管部に形成された環状の凹入溝に収容され、
第１継手の上記連結口部と上記受け口との境界箇所に径内方向に突き出た環状の受け面が形成され、上記直管部の先端部を折り返すことによって形成されて径外方向に突き出た鍔形部が上記受け面に軸方向で対向していると共に、上記受け面と上記鍔形部との対向空間に、上記受け面又は上記鍔形部に対して摺動可能な金属製の環状スペーサが上記直管部に外嵌された状態で収容されていることを特徴とする可撓性継手管。 A flexible joint pipe in which a first joint and a second joint connected to a mating piping element are separately provided at one end and the other end of the flexible pipe.
The flexible tube is a metal corrugated tube that can be bent and deformed.
The first joint and the second joint are irremovably connected to the flexible pipe, and the first joint provided at one end of the flexible pipe is a resin provided in the mating piping element. The socket into which the plastic insertion port is inserted and the tubular connecting port portion connected to one end of the flexible pipe are integrally provided, and the inner peripheral surface of the socket is formed on the outer peripheral surface of the insertion port. It is made of heat-sealing resin heat-sealing joint.
At the connecting portion between one end of the flexible pipe and the connecting port of the first joint, a straight pipe portion provided at one end of the corrugated pipe forming the flexible pipe is inserted into the connecting port. At the same time, an elastic ring for a watertight seal that slidably adheres to the inner peripheral surface of the connecting port and the outer peripheral surface of the straight pipe portion is formed in the annular recessed groove formed in the straight pipe portion. Contained,
An annular receiving surface protruding in the in-diameter direction is formed at the boundary between the connecting port and the receiving port of the first joint, and is formed by folding back the tip of the straight pipe and protruding in the out-diameter direction. The flange-shaped portion faces the receiving surface in the axial direction, and a metal ring that is slidable with respect to the receiving surface or the flange-shaped portion in the space facing the receiving surface and the flange-shaped portion. A flexible joint pipe characterized in that a spacer is housed in a state of being fitted onto the straight pipe portion.

上記可撓管の一端部に第１継手の上記連結口部が水密状態で回転可能に連結されている請求項４に記載した可撓性継手管。 The flexible joint pipe according to claim 4, wherein the connection port portion of the first joint is rotatably connected to one end of the flexible pipe in a watertight state.