JP2735309B2 - Manufacturing method of composite pipe - Google Patents
Manufacturing method of composite pipeInfo
- Publication number
- JP2735309B2 JP2735309B2 JP1228574A JP22857489A JP2735309B2 JP 2735309 B2 JP2735309 B2 JP 2735309B2 JP 1228574 A JP1228574 A JP 1228574A JP 22857489 A JP22857489 A JP 22857489A JP 2735309 B2 JP2735309 B2 JP 2735309B2
- Authority
- JP
- Japan
- Prior art keywords
- resin layer
- synthetic resin
- peripheral surface
- inner peripheral
- composite pipe
- 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 - Fee Related
Links
Landscapes
- Joints With Sleeves (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、金属管内周面が合成樹脂層にてライニング
されら複合管の製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a composite pipe in which the inner peripheral surface of a metal pipe is lined with a synthetic resin layer.
（従来の技術） 例えば、建築物内に略鉛直状に竪配管される排水管に
は、金属管内周面に合成樹脂層がライニングされた複合
管が使用される。このような複合管同士を接続する場合
には、接続される一方の複合管の端部に受口部を形成
し、該受口部に例えばゴム製のシール部材を装着して、
他方の複合管の端部の挿口部が、該シール部材内に挿入
される。(Prior Art) For example, a composite pipe in which a synthetic resin layer is lined on an inner peripheral surface of a metal pipe is used as a drain pipe that is vertically piped substantially vertically in a building. When such composite pipes are connected to each other, a receiving portion is formed at an end of one of the connected composite tubes, and a rubber sealing member is attached to the receiving portion, for example.
The insertion port at the end of the other composite pipe is inserted into the sealing member.
このような複合管の受口部は、例えば、実開昭62−15
681号公報に開示されているように、複合管を構成する
合成樹脂層が、該受口部材周面全面にわたって被覆され
ており、該合成樹脂層の内周面に環状のゴムパッキング
が装着されている。The receiving portion of such a composite pipe is described in, for example, Jpn.
As disclosed in Japanese Patent No. 681, a synthetic resin layer constituting the composite pipe is coated over the entire peripheral surface of the receiving member, and an annular rubber packing is attached to the inner peripheral surface of the synthetic resin layer. ing.
（発明が解決しようとする課題） このような構成の受口部構造では、複合管における外
管と合成樹脂層とを一体的に拡径加工することにより、
あるいは外管の端部を拡径加工した後に合成樹脂層を拡
径加工することにより製造される。このため、製造が容
易でなく、また、拡径された状態の合成樹脂層は、外管
から剥離しやすいという問題がある。上述の公報に開示
された受口部の構成では、合成樹脂層内周面にゴムパッ
キングが装着され、該ゴムパッキング内に挿口部が挿入
されるようになっている。該ゴムパッキングは合成樹脂
層の外管からの剥離を防止するが、該ゴムパッキング
は、合成樹脂層から脱落しやすく、また、挿口部がゴム
パッキング内に挿入される際に、該ゴムパッキングの位
置がずれるおそれもある。(Problem to be Solved by the Invention) In the socket structure having such a configuration, the outer tube and the synthetic resin layer in the composite tube are integrally expanded in diameter, whereby
Alternatively, it is manufactured by expanding the diameter of the end portion of the outer tube and then expanding the diameter of the synthetic resin layer. For this reason, there is a problem that the production is not easy and the synthetic resin layer in the expanded state is easily peeled from the outer tube. In the configuration of the receiving portion disclosed in the above-mentioned publication, a rubber packing is mounted on the inner peripheral surface of the synthetic resin layer, and an insertion portion is inserted into the rubber packing. The rubber packing prevents the synthetic resin layer from peeling off from the outer tube, but the rubber packing easily falls off the synthetic resin layer. May be shifted.
本発明は上記の問題を解決するものであり、その目的
は、受口部において拡径加工されても、合成樹脂層が金
属管内周面から剥離することを確実に防止し得る受口構
造を有する複合管の製造方法を提供することにある。The present invention has been made to solve the above problems, and an object of the present invention is to provide a socket structure capable of reliably preventing the synthetic resin layer from being peeled off from the inner peripheral surface of the metal tube even when the diameter of the socket is expanded. An object of the present invention is to provide a method of manufacturing a composite pipe having the same.
（課題を解決するための手段） 本発明の複合管の製造方法は、金属管内周面に合成樹
脂層がライニングされた複合管の端部の合成樹脂層をそ
の端面から所定長さにわたって除去した後、合成樹脂層
が除去された金属管の端部を拡径加工して、拡径加工さ
れた複合管の端部に、合成樹脂層の端部内周面に連接す
るように円筒状の弾性材からなるシール部材を設置する
ことにより上記目的が達成される。(Means for Solving the Problems) According to the method for manufacturing a composite pipe of the present invention, the synthetic resin layer at the end of the composite pipe in which the synthetic resin layer is lined on the inner peripheral surface of the metal pipe is removed over a predetermined length from the end face. After that, the end of the metal tube from which the synthetic resin layer has been removed is subjected to diameter expansion processing, and a cylindrical elastic material is attached to the end of the expanded composite pipe so as to be connected to the inner peripheral surface of the end of the synthetic resin layer. The above object is achieved by providing a sealing member made of a material.
（実施例） 以下に本発明を実施例について説明する。(Example) Hereinafter, the present invention will be described with reference to examples.
本発明の複合管の受口部構造は、第１図に示すよう
に、複合管10の一端部に形成される。該複合管10は、鋼
管、銅管、アルミニウム管等の金属管の外管11の内周面
に、受口部が形成される端部を除いて、合成樹脂層12が
被覆されている。該合成樹脂層12は、塩化ビニル、ポリ
エチレン、ポリプロピレン、ナイロン等でなり、例えば
ホットメルト系接着剤により外管11内周面に接着されて
いる。The socket structure of the composite pipe of the present invention is formed at one end of the composite pipe 10 as shown in FIG. In the composite pipe 10, a synthetic resin layer 12 is coated on an inner peripheral surface of an outer pipe 11 of a metal pipe such as a steel pipe, a copper pipe, and an aluminum pipe except for an end where a receiving portion is formed. The synthetic resin layer 12 is made of vinyl chloride, polyethylene, polypropylene, nylon, or the like, and is adhered to the inner peripheral surface of the outer tube 11 by, for example, a hot melt adhesive.
本発明の受口部構造は、複合管10の端部において合成
樹脂層12が除去された状態の外管11の一端部のみが拡径
されて拡径部11aが形成されている。複合管10における
金属管等の外管11内周面を被覆する合成樹脂層12の端部
は、開口側端部内周面が先端になるに連れて徐々に拡径
したテーパ面12aとなっており、該テーパ面12aが拡径部
11a内周面と連続した状態になっている。該拡径部11aの
先端部内周面は、先端側になるに連れて順次拡径したテ
ーパ面となっている。In the socket structure of the present invention, the diameter of only one end of the outer tube 11 from which the synthetic resin layer 12 has been removed at the end of the composite tube 10 is enlarged to form an enlarged diameter portion 11a. The end of the synthetic resin layer 12 covering the inner peripheral surface of the outer tube 11 such as a metal tube in the composite tube 10 is a tapered surface 12a whose diameter gradually increases as the inner peripheral surface on the opening side end becomes the tip. And the tapered surface 12a is
It is in a continuous state with the inner peripheral surface of 11a. The inner peripheral surface at the distal end of the enlarged diameter portion 11a is a tapered surface whose diameter is gradually increased toward the distal end.
該拡径部11a内にはゴム等の弾性材でなる円筒状のシ
ール部材20が嵌合されている。該シール部材20は、内奥
側の端部を除いて、該拡径部11aの内周面に接着剤を介
して密着されており、その内奥側の端部が、複合管10に
おける合成樹脂層12の端部内に進入した状態で、該合成
樹脂層12の端部内周面に、接着剤を介して密着してい
る。該シール部材20の内奥側の端面24は、内奥側になる
に連れて順次拡径したテーパ面になっている。該シール
部材20の拡径部11a先端面から若干内奥部側の内周面に
は、内方に突出する環状に連続した突部21が設けられて
おり、該シール部材20内に接続すべき複合管の挿口部が
挿入されて、該挿口部外周面に該突部21が液密状に当接
する。A cylindrical seal member 20 made of an elastic material such as rubber is fitted in the enlarged diameter portion 11a. The seal member 20 is in close contact with the inner peripheral surface of the enlarged diameter portion 11a via an adhesive, except for the inner end, and the inner end of the seal member 20 is combined with the composite pipe 10. In a state of entering the end of the resin layer 12, the synthetic resin layer 12 is in close contact with the inner peripheral surface of the end via an adhesive. The inner end surface 24 of the seal member 20 is a tapered surface whose diameter gradually increases toward the inner side. An annularly continuous protrusion 21 is provided on the inner peripheral surface slightly inward from the distal end surface of the enlarged diameter portion 11a of the seal member 20 so as to protrude inward. The insertion portion of the composite pipe to be inserted is inserted, and the projection 21 comes into contact with the outer peripheral surface of the insertion portion in a liquid-tight manner.
該シール部材20は、例えば、天然ゴム、NBRやCR等の
合成ゴム、あるいはエラストマー等の弾性材料にて構成
されている。該シール部材20は、例えば、内部に挿口部
が挿入されることにより、10〜20％程度、圧縮されるよ
うな寸法とされる。該シール部材20を拡大径部11aおよ
び合成樹脂層12の端部に接着する接着剤としては、エポ
キシ系、ウレタン系、ゴム系、アクリル系等のものが使
用される。The seal member 20 is made of, for example, a natural rubber, a synthetic rubber such as NBR or CR, or an elastic material such as an elastomer. The seal member 20 is dimensioned to be compressed by about 10 to 20%, for example, when an insertion portion is inserted therein. As an adhesive for bonding the sealing member 20 to the enlarged diameter portion 11a and the end of the synthetic resin layer 12, an epoxy-based, urethane-based, rubber-based, acrylic-based adhesive, or the like is used.
このような複合管の受口部構造は、例えば金属管でな
る外管11内周面が合成樹脂層12にてライニングされた複
合管10の端部における合成樹脂層を、その端面から所定
の長さにわたって除去して、該合成樹脂層12が除去され
た外管11の端部に、例えばポンチを開口部から挿入し、
該ポンチを油圧で押し込むことにより、拡径部11aを形
成し、該拡径部11a内に、予め射出成形、あるいはプレ
ス成形等により該拡径部11aの内径と略同形の外径を有
する所定の形状に成形されたシール部材20を、所定の状
態に嵌合させることにより製造される。該シール部材20
の内奥側の端部と合成樹脂層12の端部との重なり合う部
分の軸方向長さは、シール部材20の厚さ以上であること
が好ましい。The socket structure of such a composite pipe, for example, a synthetic resin layer at the end of the composite pipe 10 in which the inner peripheral surface of the outer pipe 11 made of a metal pipe is lined with the synthetic resin layer 12, from the end face, Removed over the length, at the end of the outer tube 11 from which the synthetic resin layer 12 has been removed, for example, insert a punch through the opening,
By pressing the punch with hydraulic pressure, an enlarged diameter portion 11a is formed, and a predetermined diameter having an outer diameter substantially the same as the inner diameter of the enlarged diameter portion 11a is previously formed in the enlarged diameter portion 11a by injection molding or press molding. It is manufactured by fitting the seal member 20 formed in the shape of the above into a predetermined state. The sealing member 20
It is preferable that the axial length of the overlapping portion between the innermost end and the end of the synthetic resin layer 12 is equal to or greater than the thickness of the seal member 20.
本実施例の受口部構造では、拡径部11aが形成される
複合管の端部における合成樹脂層が除去され、その内部
に嵌合されたシール部材20の端部が拡径加工されていな
い複合管の合成樹脂層12と液密状に連接されている構造
とすることにより、従来の拡径受口部おける欠点が解消
される。In the socket structure of the present embodiment, the synthetic resin layer at the end of the composite pipe in which the enlarged diameter portion 11a is formed is removed, and the end of the seal member 20 fitted inside is enlarged. By adopting a structure that is connected in a liquid-tight manner to the synthetic resin layer 12 of the composite tube, the disadvantage of the conventional enlarged-diameter receiving portion is eliminated.
第２図は、本発明の他の実施例の受口部構造を示す断
面図である。本実施例では、拡径部11a内に嵌合される
円筒状のシール部材20の略中程の内周面には環状の突部
は設けられずに、挿口部が挿入される開口部側端部に、
内周面が内奥側になるに連れて順次縮径した舌片22が配
設されている。該舌片22の先端は、内奥側になるに連れ
て順次内方へ突出している。その他の構成は、第１図に
示す実施例と同様である。本実施例では、該シール部材
20内に挿口部が挿入されると、該挿口部の外周面に舌片
22の内周面が圧着されて、両者の間が液密状にシールさ
れる。FIG. 2 is a sectional view showing a structure of a receiving portion according to another embodiment of the present invention. In the present embodiment, an annular projection is not provided on the inner peripheral surface of the cylindrical seal member 20 fitted into the enlarged diameter portion 11a at a substantially middle position, and an opening into which an insertion portion is inserted is provided. On the side edge,
A tongue piece 22 whose diameter is gradually reduced as the inner peripheral surface becomes closer to the inner side is provided. The tip of the tongue piece 22 sequentially protrudes inward toward the inside. Other configurations are the same as those of the embodiment shown in FIG. In this embodiment, the sealing member
When the insertion portion is inserted into 20, the tongue piece is attached to the outer peripheral surface of the insertion portion.
The inner peripheral surface of 22 is crimped, and the space between them is sealed in a liquid-tight manner.
第３図は、本発明のさらに他の実施例の受口部構造を
示す断面図である。本実施例では、拡径部11aの開口部
が形成された先端部が、先端側になるに連れて順次縮径
した状態になっており、該拡径部11a内に円筒状のシー
ル部材20が嵌合されている。該シール部材20は、第２図
に示すシール部材20と同様に、挿口部が挿入される開口
部側端部に、内周面が内奥側になるに連れて順次縮径し
た舌片22が配設されている。該舌片22の先端は、内奥側
になるに連れて順次内方へ突出している。また、該シー
ル部材20内周面における中程には、挿入される挿口部の
先端が突き当てられるように、軸心方向に対して直交状
態で内方に突出した段差部23が形成されている。FIG. 3 is a sectional view showing a structure of a receiving portion according to still another embodiment of the present invention. In the present embodiment, the distal end where the opening of the enlarged diameter portion 11a is formed is gradually reduced in diameter toward the distal end side, and a cylindrical sealing member 20 is provided in the enlarged diameter portion 11a. Are fitted. Similar to the seal member 20 shown in FIG. 2, the seal member 20 has a tongue piece having a diameter gradually reduced as the inner peripheral surface becomes closer to the inner side at the opening side end where the insertion portion is inserted. 22 are arranged. The tip of the tongue piece 22 sequentially protrudes inward toward the inside. In the middle of the inner peripheral surface of the seal member 20, a step 23 protruding inward in a state perpendicular to the axial direction is formed so that the tip of the insertion port to be inserted is abutted. ing.
本実施例では、シール部材20は、拡径部11aの開口側
先端部が縮径状態になっているため、該拡径部11a内か
らシール部材20が脱落するおそれがない。また、該シー
ル部材20に挿口部が挿入されると、該シール部材20の舌
片22が挿口部の外周面に液密状に圧着されて、該シール
部材20により挿口部と受口部との間が確実にシールされ
る。そして、該シール部材20内に挿入された挿口部の先
端は、段差部23に突き当てられた状態になって、挿口部
は確実に位置決めされる。In the present embodiment, the sealing member 20 has a reduced diameter at the opening-side end of the enlarged diameter portion 11a, so that there is no possibility that the sealing member 20 will fall out of the enlarged diameter portion 11a. Further, when the insertion portion is inserted into the seal member 20, the tongue piece 22 of the seal member 20 is pressed against the outer peripheral surface of the insertion portion in a liquid-tight manner, and is received by the seal member 20 with the insertion portion. The gap between the mouth and the mouth is securely sealed. Then, the tip of the insertion portion inserted into the seal member 20 comes into contact with the step portion 23, and the insertion portion is reliably positioned.
（発明の効果） 本発明の複合管の製造方法は、受口部において拡径加
工されても、合成樹脂層が金属管内周面から剥離するこ
とを確実に防止し得る。また、本発明の複合管の製造方
法による受口は、シール部材により、複合管の受口部に
おけるシール性が確実になるとともに、外管内周面を被
覆する合成樹脂層と同様に、外管を腐食から確実に保護
することができる。(Effect of the Invention) The method for manufacturing a composite pipe of the present invention can reliably prevent the synthetic resin layer from peeling off from the inner peripheral surface of the metal pipe even if the diameter of the composite pipe is expanded at the socket. In addition, the socket according to the method for manufacturing a composite pipe of the present invention ensures that the sealing property at the socket of the composite pipe is ensured by the sealing member, and the outer pipe is formed in the same manner as the synthetic resin layer covering the inner peripheral surface of the outer pipe. Can be reliably protected from corrosion.
第１図〜第３図は、それぞれ本発明の複合管の受口部構
造の一例を示す断面図である。 10……複合管、11……外管、11a……拡径部、12……合
成樹脂層、20……シール部材、21……突部、22……舌
片。1 to 3 are cross-sectional views each showing an example of a receiving portion structure of the composite pipe of the present invention. 10 ... composite tube, 11 ... outer tube, 11a ... diameter enlarged portion, 12 ... synthetic resin layer, 20 ... seal member, 21 ... projection, 22 ... tongue piece.
Claims (1)
れた複合管の端部の合成樹脂層をその端面から所定長さ
にわたって除去した後、合成樹脂層が除去された金属管
の端部を拡径加工して、拡径加工された複合管の端部
に、合成樹脂層の端部内周面に連接するように円筒状の
弾性材からなるシール部材を設置することを特徴とする
複合管の製造方法。1. An end portion of a metal tube from which the synthetic resin layer has been removed after a predetermined length of the synthetic resin layer is removed from the end surface of the composite tube having a synthetic resin layer lined on the inner peripheral surface of the metal tube. A composite member characterized by installing a sealing member made of a cylindrical elastic material so as to be connected to the inner peripheral surface of the end of the synthetic resin layer at the end of the composite pipe subjected to the diameter expansion. Pipe manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1228574A JP2735309B2 (en) | 1989-09-04 | 1989-09-04 | Manufacturing method of composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1228574A JP2735309B2 (en) | 1989-09-04 | 1989-09-04 | Manufacturing method of composite pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0392690A JPH0392690A (en) | 1991-04-17 |
| JP2735309B2 true JP2735309B2 (en) | 1998-04-02 |
Family
ID=16878498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1228574A Expired - Fee Related JP2735309B2 (en) | 1989-09-04 | 1989-09-04 | Manufacturing method of composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2735309B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7054018B1 (en) | 1994-07-22 | 2006-05-30 | Fuji Xerox Co., Ltd. | Printing apparatus and printing control method and character font pattern control method in printing apparatus |
| JP2002303387A (en) * | 2001-04-05 | 2002-10-18 | Sekisui Chem Co Ltd | Pipe joint |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5429117A (en) * | 1977-08-09 | 1979-03-05 | Kubota Ltd | Joint method of mortar lining tube with cemented interior |
| JPS57152165A (en) * | 1981-03-13 | 1982-09-20 | Nec Corp | Manufacture of field effect transistor |
| JPS5958275U (en) * | 1982-10-08 | 1984-04-16 | 株式会社栗本鉄工所 | Pipe joints for pipes for propulsion method |
-
1989
- 1989-09-04 JP JP1228574A patent/JP2735309B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0392690A (en) | 1991-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |