JP2002357293A - Fusing structure and pipe end treating method of resinous tube - Google Patents
Fusing structure and pipe end treating method of resinous tubeInfo
- Publication number
- JP2002357293A JP2002357293A JP2001166375A JP2001166375A JP2002357293A JP 2002357293 A JP2002357293 A JP 2002357293A JP 2001166375 A JP2001166375 A JP 2001166375A JP 2001166375 A JP2001166375 A JP 2001166375A JP 2002357293 A JP2002357293 A JP 2002357293A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- resin tube
- resin
- spigot
- length
- 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.)
- Granted
Links
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
- Pipe Accessories (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、樹脂製ガス配管等
の管端処理に用いる電気融着キャップ、あるいは樹脂製
配管等を接続する電気融着継手を樹脂管端部に電気融着
する樹脂管の融着構造、及び樹脂管の管端処理方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric fusion cap for use in the treatment of a pipe end of a resin gas pipe or the like, or a resin for electrically welding an electric fusion joint for connecting a resin pipe or the like to the end of a resin pipe. The present invention relates to a pipe fusion structure and a method of treating a pipe end of a resin pipe.
【０００２】[0002]
【従来の技術】たとえば、埋設ガス配管において、図１
に示すように、公道Ａ側に埋設された本支管１より各ユ
ーザーへガス供給するに際し本支管１を電気融着サドル
２で分岐し、この電気融着サドル２のスピゴット管部３
と民地Ｂ側の各ユーザーへの樹脂製の供給管４とを電気
融着ソケットよりなる継手５で接続しているが、ユーザ
ーの移転や増改築等の諸事情により、供給管４を本支管
１の分岐部付近で切断し、この切断端部を塞ぐ管端処理
を必要とする場合がある。なお、図中Ｃは官民境界線、
Ｄは側溝を示す。2. Description of the Related Art For example, in a buried gas pipe, FIG.
As shown in FIG. 2, when gas is supplied to each user from the main pipe 1 buried on the side of the public road A, the main pipe 1 is branched by an electric fusion saddle 2, and the spigot pipe portion 3 of the electric fusion saddle 2 is provided.
The supply pipe 4 made of resin for each user on the private land B side is connected by a joint 5 composed of an electric fusion socket. In some cases, a pipe end is cut near the branch portion of the branch pipe 1 and a pipe end treatment for closing the cut end is required. In the figure, C is the public-private border,
D indicates a side groove.
【０００３】この場合、たとえば、図９に示すように、
既設の電気融着サドル２のスピゴット管部３の継手５に
至るまでの箇所を切断し、この切断端部を電気融着キャ
ップ８で塞ぐことが考えられる。しかし、元来スピゴッ
ト管部３は短寸であるため、スピゴット管部３の切り残
された残存部分３ａは更に短い長さＥになる。一方、通
電により発熱する電熱線等の発熱体７を埋設した電気融
着キャップ８はＪＩＳ規格品であるが、その融着長さ規
定が最低長さ寸法だけ規定され、長い方向の寸法につい
ては規定されていないため、各製造メーカーや品種によ
り電気融着キャップ８の飲み込み長さＦはまちまちであ
る。このため、スピゴット管部３の短い残存部分３ａに
対し飲み込み長さＦの長い品種の電気融着キャップ８を
使用した場合に次のような問題が発生する。すなわち、
図９に示すように、スピゴット管部３の残存部分３ａの
切断管端部に電気融着キャップ８を挿入すると、挿入長
さ不足Ｇが生じ、このため融着不良Ｐが起こる。したが
って、電気融着サドル２のスピゴット管部３の一部を切
断し、この切断管端部を電気融着キャップ８で塞ぐとい
う管端処理方法は採用することができなかった。In this case, for example, as shown in FIG.
It is conceivable to cut a portion of the existing electrofusion saddle 2 up to the joint 5 of the spigot tube portion 3 and close the cut end with the electrofusion cap 8. However, since the spigot tube portion 3 is originally short, the remaining portion 3a of the spigot tube portion 3 which is left uncut has a shorter length E. On the other hand, the electrofusion cap 8 in which the heating element 7 such as a heating wire that generates heat by energization is embedded is a JIS standard product, but the fusion length is limited only to the minimum length. Since it is not specified, the swallowing length F of the electrofusion cap 8 varies depending on each manufacturer and product type. For this reason, the following problem arises when the electrofusion cap 8 of a long product type having a long swallowing length F is used for the short remaining portion 3a of the spigot tube portion 3. That is,
As shown in FIG. 9, when the electrofusion cap 8 is inserted into the end of the cutting pipe of the remaining portion 3a of the spigot pipe 3, an insertion length shortage G occurs, and therefore, a welding failure P occurs. Therefore, a pipe end processing method of cutting a part of the spigot tube portion 3 of the electrofusion saddle 2 and closing the cut tube end with the electrofusion cap 8 could not be adopted.
【０００４】このため、従来では、図８に示すように、
既設の電気融着サドル２のスピゴット管部３ではなく供
給管４側で十分な融着代を残した状態で切除し、この供
給管４の残存部分４ａの切断管端部４ｂを電気融着キャ
ップ８で塞ぐという管端処理が行われていた。For this reason, conventionally, as shown in FIG.
Cutting is performed on the supply pipe 4 side instead of the spigot pipe section 3 of the existing electrofusion saddle 2 in a state where a sufficient fusion margin is left, and the cut pipe end 4b of the remaining portion 4a of the supply pipe 4 is electrofused. The pipe end processing of closing with a cap 8 has been performed.
【０００５】[0005]
【発明が解決しようとする課題】しかし、本発明者ら
は、かかる供給管４の一部を切断し管端処理する方法で
は、電気融着キャップ８で塞がれた供給管４の残存部分
４ａが本支管１より横方向に長くはみ出していたため、
そのはみ出し部分が他工事による破損、折損等のガス漏
れ事故の原因箇所となるケースが多々あることを知見し
た。However, the inventor of the present invention has proposed a method of cutting a part of the supply pipe 4 and treating the end of the supply pipe 4 with the remaining part of the supply pipe 4 closed by the electrofusion cap 8. Because 4a protruded longer than the main pipe 1 in the horizontal direction,
We found that there were many cases where the protruding part was the cause of gas leak accidents such as breakage and breakage due to other construction.
【０００６】そこで、本発明の目的は、上記のような既
設の埋設ガス配管において、電気融着サドルのスピゴッ
ト管部の一部を切除し、この切断管端部を電気融着キャ
ップで塞ぐという管端処理の実現を可能にすることがで
き、もって供給管の一部を切断し管端処理することによ
り生じる上記ガス漏れ事故原因の発生問題を解消できて
安全性を確保できる樹脂管の融着構造及び樹脂管の管端
処理方法を提供することにある。また、本発明の目的
は、既設の管継手の近傍で樹脂管を切り取り電気融着継
手を用いて補修する場合にも融着不良を起こすことなく
安全確実に融着できる樹脂管の融着構造を提供すること
にある。Accordingly, an object of the present invention is to cut off a part of the spigot pipe portion of the electrofusion saddle in the existing buried gas pipe as described above and close the cut pipe end with an electrofusion cap. It is possible to realize pipe end processing, thereby solving the above-mentioned problem of the cause of the gas leak accident caused by cutting a part of the supply pipe and performing pipe end processing, and ensuring the safety of the resin pipe. An object of the present invention is to provide a fitting structure and a method for treating a pipe end of a resin pipe. Further, an object of the present invention is to provide a resin pipe fusion structure that can safely and securely fuse without causing poor fusion even when a resin pipe is cut off near an existing pipe joint and repaired using an electric fusion joint. Is to provide.
【０００７】[0007]
【課題を解決するための手段】本発明の樹脂管の融着構
造は、発熱体を埋設した受口を有する電気融着キャップ
または電気融着継手の前記受口に樹脂管の端部が挿入さ
れ、前記受口の内周面と前記樹脂管の端部の外周面との
重合面間が前記発熱体の熱により融着される樹脂管の融
着構造において、前記樹脂管の端部と前記受口の内奥部
との間に該樹脂管と同材質の延長カラーを介在させて、
前記延長カラーの外周面と受口の内周面との重合面をも
融着していることに特徴を有するものである。この場合
において、上記延長カラーはこれの一端に樹脂管端部に
内嵌する径小筒部を付けた形に形成することができる。According to the present invention, an end portion of a resin tube is inserted into an electric fusion cap or an electric fusion joint having a socket in which a heating element is embedded. In a resin tube fusion structure in which a gap between an inner peripheral surface of the receptacle and an outer peripheral surface of an end portion of the resin tube is fused by heat of the heating element, the end portion of the resin tube An extension collar of the same material as the resin tube is interposed between the inner part of the receiving port and
The present invention is characterized in that the overlapping surface of the outer peripheral surface of the extension collar and the inner peripheral surface of the receiving port is also fused. In this case, the extension collar can be formed in a shape in which a small-diameter cylindrical portion that fits inside the resin tube end is attached to one end of the extension collar.
【０００８】本発明の樹脂管の管端処理方法は、本支管
を樹脂製のスピゴット管部を有する電気融着サドルで分
岐し、前記スピゴット管部と各ユーザーへの供給管とを
継手で接続している埋設ガス配管において、前記スピゴ
ット管部の前記継手に至るまでの箇所が切断される工程
と、発熱体を埋設した受口を有する電気融着キャップの
前記受口が前記スピゴット管部の残存部分に該スピゴッ
ト管部と同材質の延長カラーを介在させて挿入される工
程と、前記受口の内周面と前記スピゴット管部の残存部
分及び前記延長カラーの外周面との重合面間が前記発熱
体の熱により融着される工程とを含むことに特徴を有す
るものである。According to a method for treating a pipe end of a resin pipe according to the present invention, the main pipe is branched by an electrofusion saddle having a resin spigot pipe section, and the spigot pipe section and a supply pipe to each user are connected by a joint. In the buried gas pipe, a step of cutting the spigot pipe portion up to the joint is cut, and the receiving port of the electrofusion cap having a receiving port in which a heating element is embedded is provided in the spigot pipe section. A step of being inserted into the remaining portion with an extension collar of the same material as the spigot tube portion, and a gap between an inner peripheral surface of the receiving port and a remaining portion of the spigot tube portion and an outer peripheral surface of the extension collar. And the step of fusing by the heat of the heating element.
【０００９】[0009]
【作用】樹脂管の端部又はスピゴット管部の残存部分の
電気融着継手又は電気融着キャップへの挿入長さが電気
融着キャップ又は電気融着継手の飲み込み長さよりも短
くて、飲み込み長さ不足が生じる場合も、延長カラーの
介在により前記飲み込み長さの不足を補うことができる
ため、融着不良を起こすことなく適切に融着することが
可能になる。The insertion length of the end of the resin tube or the remaining portion of the spigot tube into the electrofusion joint or the electrofusion cap is shorter than the swallowing length of the electrofusion cap or the electrofusion joint. In the case where the shortage occurs, the shortage of the swallowing length can be compensated for by the interposition of the extension collar, so that the fusion can be appropriately performed without causing the fusion failure.
【００１０】[0010]
【発明の実施の形態】本発明の好適な実施形態である第
１実施例及び第２実施例を図面に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment and a second embodiment which are preferred embodiments of the present invention will be described with reference to the drawings.
【００１１】（第１実施例）既設の埋設ガス配管の管端
処理を行う場合の実施例を図１ないし図６に基いて説明
する。図１に示すように、樹脂製の本支管１より各ユー
ザーへガス供給するに際し本支管１を樹脂製のスピゴッ
ト管部３を有する電気融着サドル２で分岐し、そのスピ
ゴット管部３と各ユーザーへの樹脂製の供給管４とを電
気融着ソケット等による継手５で接続している埋設ガス
配管において、ユーザーの移転や増改築等の諸事情によ
り、ユーザーへの供給を中断する必要がある場合であ
る。(First Embodiment) An embodiment in which a pipe end treatment of an existing buried gas pipe is performed will be described with reference to FIGS. As shown in FIG. 1, when gas is supplied to each user from the main resin pipe 1, the main pipe 1 is branched by an electric fusion saddle 2 having a resin spigot pipe section 3. In a buried gas pipe connecting the resin supply pipe 4 to the user with a joint 5 using an electric fusion socket or the like, it is necessary to interrupt the supply to the user due to circumstances such as relocation of the user or extension or remodeling. There are cases.
【００１２】その際、図２、図３または図４に示すよう
に、既設の電気融着サドル２のスピゴット管部３の継手
５より手前側を切断し、このスピゴット管部３の残存部
分３ａの切断管端部３ｂを樹脂製の電気融着キャップ８
で塞ぐ管端処理を行う。このとき、スピゴット管部３の
残存部分３ａの長さＥ（但し、この長さＥはＪＩＳ規定
の融着長さを満足する長さである。）が、使用しようと
する電気融着キャップ８の受口９の飲み込み長さＦより
も短いと、図９に示すごとくスピゴット管部３の残存部
分３ａの電気融着キャップ８への挿入長さ不足Ｇ、つま
り電気融着キャップ８の飲み込み長さ不足が生じる。At this time, as shown in FIG. 2, FIG. 3 or FIG. 4, the front side of the spigot tube portion 3 of the existing electrofusion saddle 2 from the joint 5 is cut, and the remaining portion 3a of the spigot tube portion 3 is cut off. Of the cutting pipe of the resin to the electric fusion cap 8 made of resin
Perform pipe end treatment to close with. At this time, the length E of the remaining portion 3a of the spigot tube portion 3 (however, this length E is a length satisfying the fusion length specified in JIS) is equal to the electric fusion cap 8 to be used. 9, the remaining length 3a of the spigot tube 3 is insufficiently inserted into the electrofusion cap 8 as shown in FIG. 9, that is, the swallowing length of the electrofusion cap 8 as shown in FIG. Shortage occurs.
【００１３】そこで、挿入長さ不足Ｇに見合う長さの延
長カラー１０を使用する。この延長カラー１０は電気融
着サドル２のスピゴット管部３と同材質の樹脂材、例え
ばポリエチレンからなる成形品である。延長カラー１０
の形状としては、図６に示すごとく、スピゴット管部３
の残存部分３ａの内外径と同一か略同一径の環状に形成
したものや、図５に示すごとくスピゴット管部３の残存
部分３ａの内外径と略同一径の環状に形成するととも
に、この環状部１０ａの一端にスピゴット管部３の残存
部分３ａに内嵌する径小筒部１０ｂを付けた形に形成し
たものなどがある。図５に示す形状の延長カラー１０に
よれば、図３に示すごとく径小筒部１０ｂをスピゴット
管部３の残存部分３ａに内嵌することにより該残存部分
３ａの切断管端部３ｂに同一中心線上で突合わせ状態に
なるよう容易に仮結合することができる。Therefore, an extension collar 10 having a length corresponding to the insertion length shortage G is used. The extension collar 10 is a molded product made of the same resin material as the spigot tube portion 3 of the electrofusion saddle 2, for example, polyethylene. Extension collar 10
As shown in FIG. 6, the shape of the spigot tube 3
5 is formed into an annular shape having the same or substantially the same diameter as the inner and outer diameters of the remaining portion 3a, or as shown in FIG. 5, formed into an annular shape having the same diameter as the inner and outer diameters of the remaining portion 3a of the spigot tube portion 3. For example, there is a portion formed by attaching a small-diameter cylindrical portion 10b to the remaining portion 3a of the spigot tube portion 3 at one end of the portion 10a. According to the extension collar 10 having the shape shown in FIG. 5, the small-diameter cylindrical portion 10b is fitted inside the remaining portion 3a of the spigot tube portion 3 as shown in FIG. Temporary joining can be easily performed so that they are in a butted state on the center line.
【００１４】樹脂製の電気融着キャップ８はその受口９
の内部に通電により発熱する電熱線その他の導電材など
の発熱体７を埋設してある周知のものである。The resin welding cap 8 has a socket 9
Is a well-known device in which a heating element 7 such as a heating wire or other conductive material that generates heat when energized is embedded.
【００１５】スピゴット管部３の残存部分３ａの長さＥ
よりも長い飲み込み長さＦをもつ電気融着キャップ８
と、飲み込み長さ不足を補う延長カラー１０とを用いて
スピゴット管部３の切断管端部３ｂを塞ぐ管端処理に際
しては、図３や図４に示すように、スピゴット管部３の
残存部分３ａの切断管端部３ｂに延長カラー１０を突合
わせるとともに、これら残存部分３ａ及び延長カラー１
０に電気融着キャップ８の受口９を挿入する。これによ
りスピゴット管部３の切断管端部３ｂと受口９の内奥部
との間に延長カラー１０が介在して飲み込み長さ不足を
補う状態が得られる。The length E of the remaining portion 3a of the spigot tube 3
Electrofusion cap 8 with longer swallowing length F
At the time of the pipe end processing for closing the cutting pipe end 3b of the spigot pipe section 3 using the extension collar 10 for compensating for the shortage of the swallowing length, as shown in FIGS. The extension collar 10 is abutted against the cutting tube end 3b of 3a, and the remaining portion 3a and the extension collar 1
The socket 9 of the electrofusion cap 8 is inserted into the hole 0. As a result, a state is obtained in which the extension collar 10 is interposed between the cutting pipe end 3b of the spigot pipe 3 and the inner depth of the receiving port 9 to compensate for the shortage of the swallowing length.
【００１６】かくして、電気融着キャップ８の発熱体７
に通電すると、発熱体７の発熱により電気融着キャップ
８の受口９の内周面と残存部分３ａ及び延長カラー１０
の外周面とが融着し、図９に示すごとき融着不良Ｐを起
こさせることなく適切に融着できる。これによりスピゴ
ット管部３の切断管端部３ｂが電気融着キャップ８によ
り安全確実に塞がれる管端処理状態が得られる。なお、
図３、図４において、スピゴット管部３の残存部分３ａ
の融着長さＫはＪＩＳ規定の融着長さ以上を確保してい
ることは言うまでもない。Thus, the heating element 7 of the electric fusion cap 8
When the power is supplied to the heating element 7, the heat generated by the heating element 7 causes the inner peripheral surface of the receptacle 9 of the electrofusion cap 8 and the remaining portion 3a and the extension collar 10 to be extended.
Are fused to each other, and proper fusion can be performed without causing a fusion defect P as shown in FIG. As a result, a pipe end processing state in which the cut end 3b of the spigot tube 3 is securely and securely closed by the electrofusion cap 8 is obtained. In addition,
3 and 4, the remaining portion 3a of the spigot tube 3
Needless to say, the fusion length K of the above is secured to be equal to or longer than the fusion length specified in JIS.
【００１７】（第２実施例）本発明は、図７に示すよう
に、ソケット、エルボ等の管継手１１に接続されている
既設の樹脂管１２を、管継手１１の近傍で切り取り、こ
の樹脂管１２の残存部分１２ａに新設の樹脂管１３を樹
脂製の電気融着継手１３を用いて接続するという補修工
事の場合にも同様に適用できる。すなわち、既設の樹脂
管１２の切り取られた残存部分１２ａの長さＥが短くな
り（ただし、ＪＩＳ規定の融着長さを満足する長さ）、
これに対し樹脂製の電気融着継手１３の受口１４の飲み
込み長さＦが前記残存部分１２ａの長さＥよりも長い
と、挿入長さ不足つまり飲み込み長さ不足が生じるが、
このとき樹脂管１２と同材質で前記飲み込み長さ不足を
補う長さをもつ延長カラー１０を使用することにより、
樹脂管１２の残存部分１２ａに電気融着継手８の受口９
を融着不良を起こすことなく適切に融着することができ
る。(Second Embodiment) In the present invention, as shown in FIG. 7, an existing resin pipe 12 connected to a pipe joint 11 such as a socket or an elbow is cut off near the pipe joint 11, and this resin pipe is cut out. The present invention can be similarly applied to the case of repair work in which a new resin pipe 13 is connected to the remaining portion 12a of the pipe 12 using a resin-made electric fusion joint 13. That is, the length E of the cut-out remaining portion 12a of the existing resin pipe 12 is shortened (however, a length satisfying the fusion length specified in JIS),
On the other hand, if the swallowing length F of the receptacle 14 of the resin-made electrofusion joint 13 is longer than the length E of the remaining portion 12a, the insertion length is short, that is, the swallowing length is short.
At this time, by using the extension collar 10 made of the same material as the resin tube 12 and having a length that compensates for the shortage of the swallowing length,
In the remaining portion 12a of the resin tube 12, a socket 9 of the electrofusion joint 8 is provided.
Can be appropriately fused without causing poor fusion.
【００１８】[0018]
【発明の効果】本発明によれば、電気融着サドルのスピ
ゴット管部や樹脂製配管等の管端処理に用いる電気融着
キャップの飲み込み長さ不足または樹脂製配管を接続す
る電気融着継手の飲み込み長さ不足を補う延長カラーを
用いるという簡単な手段で、電気融着キャップや電気融
着継手を管端部に融着不良を起こすことなく適切に融着
することができるという利点がある。According to the present invention, the swaging length of the electrofusion cap used for the pipe end treatment of the spigot pipe portion of the electrofusion saddle and the resin pipe or the like, or the electrofusion joint for connecting the resin pipe. There is an advantage that the electrofusion cap and the electrofusion joint can be properly fused without causing a fusion defect at the pipe end by a simple means of using an extension collar to compensate for the shortage of the swallowing length of the tube. .
【図１】埋設ガス配管が地中に埋設されている状態の断
面図である。FIG. 1 is a sectional view showing a state in which a buried gas pipe is buried underground.
【図２】図１の埋設ガス配管の管端処理後の状態を示す
断面図である。FIG. 2 is a sectional view showing a state after a pipe end treatment of the buried gas pipe of FIG. 1;
【図３】図２の管端処理部の拡大断面図である。FIG. 3 is an enlarged sectional view of a tube end processing unit in FIG. 2;
【図４】他の実施例を図３に相応して示す断面図であ
る。FIG. 4 is a sectional view showing another embodiment corresponding to FIG. 3;
【図５】図３の管端処理部に使用する延長カラーの半欠
截断面図である。FIG. 5 is a partially cutaway sectional view of an extension collar used in the tube end processing section of FIG. 3;
【図６】図４の管端処理部に使用する延長カラーの半欠
截断面図である。FIG. 6 is a partially cutaway sectional view of an extension collar used in the tube end processing section of FIG. 4;
【図７】更に他の実施例の樹脂管の融着構造の断面図で
ある。FIG. 7 is a sectional view of a fusion splicing structure of a resin tube according to still another embodiment.
【図８】従来例の埋設ガス配管の管端処理後の状態を示
す断面図である。FIG. 8 is a cross-sectional view showing a state after a pipe end treatment of a conventional embedded gas pipe.
【図９】比較例の埋設ガス配管の管端処理後の状態を示
す断面図である。FIG. 9 is a cross-sectional view showing a state after a pipe end treatment of a buried gas pipe of a comparative example.
１ 本支管 ２ 電気融着サドル ３ 電気融着サドルのスピゴット管部 ３ｂ 切断管端部 ４ 供給管 ５ 継手 ７ 発熱体 ８ 電気融着キャップ ９ 電気融着キャップの受口 １０ 延長カラー １２ 樹脂管 １３ 電気融着継手 １４ 電気融着継手の受口 DESCRIPTION OF SYMBOLS 1 Main pipe 2 Electrofusion saddle 3 Spigot pipe part of electrofusion saddle 3b Cutting pipe end 4 Supply pipe 5 Joint 7 Heating element 8 Electrofusion cap 9 Receptacle of electrofusion cap 10 Extension collar 12 Resin pipe 13 Electrofusion joint 14 Socket for electrofusion joint
───────────────────────────────────────────────────── フロントページの続き (72)発明者 時岡 宏行 千葉県市川市市川南２丁目８番８号 京葉 瓦斯株式会社内 (72)発明者 岸本 裕司 大阪府岸和田市田治米町153番地の１ 日 本鋼管継手株式会社内 Ｆターム(参考） 3H019 GA03 3H025 DA01 DB22 DC01 DD13 4F209 AD12 AG08 AG23 AG29 NA25 NA26 NP01 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Tokioka 2- 8-8 Ichikawaminami, Ichikawa-shi, Chiba Inside Keiyo Gas Co., Ltd. (72) Inventor Yuji Kishimoto 153-1, Tajimecho, Kishiwada-shi, Osaka Japan F term (reference) 3H019 GA03 3H025 DA01 DB22 DC01 DD13 4F209 AD12 AG08 AG23 AG29 NA25 NA26 NP01
Claims (4)
キャップの前記受口に樹脂管の端部が挿入され、前記受
口の内周面と前記樹脂管の端部の外周面との重合面間が
前記発熱体の熱により融着される樹脂管の融着構造にお
いて、 前記樹脂管の端部と前記受口の内奥部との間に該樹脂管
と同材質の延長カラーを介在させて、前記延長カラーの
外周面と受口の内周面との重合面間をも融着しているこ
とを特徴とする樹脂管の融着構造。1. An end portion of a resin pipe is inserted into the receptacle of an electrofusion cap having a receptacle in which a heating element is embedded, and an inner peripheral surface of the receptacle and an outer peripheral surface of an end of the resin pipe are connected to each other. In the fusion structure of a resin tube in which the overlapping surfaces of the resin tube are fused by the heat of the heating element, an extension collar made of the same material as the resin tube is provided between an end of the resin tube and an inner back portion of the receptacle. Wherein the superposed surface of the extension collar and the inner peripheral surface of the receiving port are also welded to each other with an interposed portion.
継手の前記受口に樹脂管の端部が挿入され、前記受口の
内周面と前記樹脂管の端部の外周面との重合面間が前記
発熱体の熱により融着される樹脂管の融着構造におい
て、 前記樹脂管の端部と前記受口の内奥部との間に該樹脂管
と同材質の延長カラーを介在させて、前記延長カラーの
外周面と受口の内周面との重合面間をも融着しているこ
とを特徴とする樹脂管の融着構造。2. An end portion of a resin tube is inserted into the socket of the electrofusion joint having a socket having a heat generating element embedded therein, and an inner peripheral surface of the receptacle and an outer peripheral surface of an end portion of the resin tube are connected to each other. In the fusion structure of a resin tube in which the overlapping surfaces of the resin tube are fused by the heat of the heating element, an extension collar made of the same material as the resin tube is provided between an end of the resin tube and an inner back portion of the receptacle. Wherein the superposed surface of the extension collar and the inner peripheral surface of the receiving port are also welded to each other with an interposed portion.
内嵌する径小筒部を付けている請求項１又は２記載の樹
脂管の融着構造。3. The fusion-bonded structure for a resin tube according to claim 1, wherein a small-diameter cylindrical portion that fits inside the resin tube end is attached to one end of the extension collar.
る電気融着サドルで分岐し、前記スピゴット管部と各ユ
ーザーへの供給管とを継手で接続している埋設ガス配管
において、前記スピゴット管部の前記継手に至るまでの
箇所が切断される工程と、発熱体を埋設した受口を有す
る電気融着キャップの前記受口が前記スピゴット管部の
残存部分に該スピゴット管部と同材質の延長カラーを介
在させて挿入される工程と、前記受口の内周面と前記ス
ピゴット管部の残存部分及び前記延長カラーの外周面と
の重合面間が前記発熱体の熱により融着される工程とを
含む樹脂管の管端処理方法。4. A buried gas pipe in which the main pipe is branched by an electric fusion saddle having a spigot pipe section made of resin, and the spigot pipe section and a supply pipe to each user are connected by a joint. A step of cutting a portion of the pipe portion up to the joint, and the socket of the electrofusion cap having a socket having a heating element embedded therein is made of the same material as the spigot pipe portion in the remaining portion of the spigot pipe portion. A step of inserting the extension collar interposed therebetween, and a gap between the overlapping surface of the inner peripheral surface of the receptacle and the remaining portion of the spigot tube portion and the outer peripheral surface of the extension collar is fused by heat of the heating element. End treatment method for a resin tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001166375A JP4538165B2 (en) | 2001-06-01 | 2001-06-01 | Fusing structure of resin pipe and pipe end processing method of resin pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001166375A JP4538165B2 (en) | 2001-06-01 | 2001-06-01 | Fusing structure of resin pipe and pipe end processing method of resin pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002357293A true JP2002357293A (en) | 2002-12-13 |
| JP4538165B2 JP4538165B2 (en) | 2010-09-08 |
Family
ID=19008918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001166375A Expired - Fee Related JP4538165B2 (en) | 2001-06-01 | 2001-06-01 | Fusing structure of resin pipe and pipe end processing method of resin pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4538165B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006258256A (en) * | 2005-03-18 | 2006-09-28 | Tokyo Gas Co Ltd | Removal method for branched pipe made of resin |
| JP2009097657A (en) * | 2007-10-18 | 2009-05-07 | Hitachi Metals Ltd | Electrofusion plug and method for treating pipe end |
| JP2009293783A (en) * | 2008-06-09 | 2009-12-17 | Tokyo Gas Co Ltd | Unnecessary part removing construction method of existing pipe, pipe inner surface cutting tool, pipe end surface cutting tool and pipe blocking-up plug |
| JP7439452B2 (en) | 2019-10-28 | 2024-02-28 | 中国電力株式会社 | Closure structure and method for remaining branch pipes |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0532897U (en) * | 1991-10-04 | 1993-04-30 | 東京瓦斯株式会社 | Bypass saddle |
| JPH06213387A (en) * | 1992-11-26 | 1994-08-02 | Nippon Zeon Co Ltd | Polyolefin pipe joint method and metal in-core for use in it |
| JPH07158787A (en) * | 1993-12-09 | 1995-06-20 | Hitachi Metals Ltd | Electric fusing member having insert hole part |
| JPH07239084A (en) * | 1994-02-24 | 1995-09-12 | Hitachi Metals Ltd | Electrically fusing joint |
| JPH11344192A (en) * | 1998-05-29 | 1999-12-14 | Mitsubishi Plastics Ind Ltd | Joining structure of electrically fused joint |
| JP2001082665A (en) * | 1999-09-16 | 2001-03-30 | Mitsubishi Plastics Ind Ltd | Electric fusion type branch pipe joint |
-
2001
- 2001-06-01 JP JP2001166375A patent/JP4538165B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0532897U (en) * | 1991-10-04 | 1993-04-30 | 東京瓦斯株式会社 | Bypass saddle |
| JPH06213387A (en) * | 1992-11-26 | 1994-08-02 | Nippon Zeon Co Ltd | Polyolefin pipe joint method and metal in-core for use in it |
| JPH07158787A (en) * | 1993-12-09 | 1995-06-20 | Hitachi Metals Ltd | Electric fusing member having insert hole part |
| JPH07239084A (en) * | 1994-02-24 | 1995-09-12 | Hitachi Metals Ltd | Electrically fusing joint |
| JPH11344192A (en) * | 1998-05-29 | 1999-12-14 | Mitsubishi Plastics Ind Ltd | Joining structure of electrically fused joint |
| JP2001082665A (en) * | 1999-09-16 | 2001-03-30 | Mitsubishi Plastics Ind Ltd | Electric fusion type branch pipe joint |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006258256A (en) * | 2005-03-18 | 2006-09-28 | Tokyo Gas Co Ltd | Removal method for branched pipe made of resin |
| JP4514047B2 (en) * | 2005-03-18 | 2010-07-28 | 東京瓦斯株式会社 | Removal method of resin branch pipe |
| JP2009097657A (en) * | 2007-10-18 | 2009-05-07 | Hitachi Metals Ltd | Electrofusion plug and method for treating pipe end |
| JP2009293783A (en) * | 2008-06-09 | 2009-12-17 | Tokyo Gas Co Ltd | Unnecessary part removing construction method of existing pipe, pipe inner surface cutting tool, pipe end surface cutting tool and pipe blocking-up plug |
| JP7439452B2 (en) | 2019-10-28 | 2024-02-28 | 中国電力株式会社 | Closure structure and method for remaining branch pipes |
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| Publication number | Publication date |
|---|---|
| JP4538165B2 (en) | 2010-09-08 |
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