JPH08170776A - Method for connecting plastic pipe - Google Patents
Method for connecting plastic pipeInfo
- Publication number
- JPH08170776A JPH08170776A JP6075243A JP7524394A JPH08170776A JP H08170776 A JPH08170776 A JP H08170776A JP 6075243 A JP6075243 A JP 6075243A JP 7524394 A JP7524394 A JP 7524394A JP H08170776 A JPH08170776 A JP H08170776A
- Authority
- JP
- Japan
- Prior art keywords
- plastic pipe
- tip
- inner core
- holding ring
- locking
- 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
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用利用】本発明は接続に必要な部品点数を
節減すると共に、接続時にパイプの傷付きを防止できる
ようにしたプラスチック管の接続方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of connecting a plastic pipe, which can reduce the number of parts required for the connection and prevent the pipe from being damaged during the connection.
【０００２】[0002]
【従来の技術】プラスチック管の接続には、継手本体の
インナーコア部にプラスチック管を嵌着し、インナーコ
ア部との間にプラスチック管を挾着できるように該プラ
スチック管上に割りリングを嵌着し、この割りリング上
に嵌着した締め付けリングをナットまたは工具により摺
動させて、割りリングをプラスチック管に締め付ける方
法が知られている（ナットによるものは実開平３−７８
１９３公報を参照、また工具によるものは実願平４−７
３２４３号として既に本出願人により提案済み。）。2. Description of the Related Art To connect a plastic pipe, a plastic pipe is fitted to an inner core portion of a joint body, and a split ring is fitted to the plastic pipe so that the plastic pipe can be sandwiched between the inner core portion and the inner core portion. There is known a method in which the split ring is attached to the plastic pipe by sliding the tightening ring fitted on the split ring with a nut or a tool.
See Japanese Patent Application No. 193, and the tool is used in Japanese Patent Application No.
Already proposed by the applicant as No. 3243. ).
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術におい
て、締め付けリングをナットにより摺動して割りリング
を締め付ける方法では部品点数が４点であり、また、工
具によるものでは３点であって、何れも部品が多くて作
業は煩雑となり、接続作業がコスト高になることは避け
られない。そして、インナーコア部の外周面上には係止
部が突設されており、その係止部の頂部は鋭角状である
ため、パイプは挿入時に傷付けられて、その傷付き部分
が弱化して破損することが往々にしてある。In the above-mentioned prior art, the method of sliding the tightening ring with the nut to tighten the split ring has four parts, and the tool has three parts. However, since there are many parts, the work becomes complicated and it is inevitable that the connection work will be expensive. A locking portion is provided on the outer peripheral surface of the inner core portion, and since the top of the locking portion has an acute angle, the pipe is damaged during insertion and the damaged portion is weakened. It is often damaged.
【０００４】そこで、本発明の目的はプラスチック管に
予め嵌着されている押えリングだけを用いる一方、イン
ナーコア部に突設されている係止部の頂部の形状を改善
し、継手本体のインナーコア部にパイプを傷付けないで
容易かつ緊密に接続できるようにしたプラスチック管の
接続方法を提供することにある。Therefore, the object of the present invention is to use only the retaining ring pre-fitted in the plastic pipe, while improving the shape of the top of the engaging portion projecting on the inner core portion to improve the inner shape of the joint body. It is an object of the present invention to provide a method for connecting plastic pipes which enables easy and close connection to the core portion without damaging the pipes.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明の特徴とするプラスチック管の接続方法は鍔
部の片面側にインナーコア部が突設され、そのインナー
コア部の先端側の外径は接続されるプラスチック管の内
径と等しいか若干大きめに形成され、外周面上には複数
個の係止部が鍔部側のものが反対側のものより順次高く
なるように突設されている共に、各係止部の頂部は面状
で鈍角に形成されている継手本体と、この継手本体に対
して接続時に手前側となる後端の内径は上記プラスチッ
ク管の外径と等しいか若干大きめに形成されていると共
に、その内径は先端に向かって次第に増大し、かつ、内
周面上には上記インナーコア部の係止部と対応させて係
止溝部が設けられている押えリングを用いて、プラスチ
ック管に押えリングを嵌着した後、そのプラスチック管
をインナーコア部に挿入すると共に、先端側は少なくと
もインナーコア部の手前側の係止部まで前進させて拡径
させ、次いで、プラスチック管上の押えリングを継手本
体側に摺動させて、プラスチック管の先端と押えリング
の先端を鍔部の側面まで移動させるものである。In order to achieve the above object, a method of connecting a plastic pipe, which is a feature of the present invention, has an inner core portion projecting from one side of a collar portion, and the inner core portion has a tip end side. Has an outer diameter equal to or slightly larger than the inner diameter of the plastic pipe to be connected.On the outer peripheral surface, a plurality of locking parts are projected so that the one on the flange side is successively higher than the one on the opposite side. At the same time, the top of each locking part is planar and has an obtuse angle, and the inner diameter of the rear end on the front side when connected to this joint is equal to the outer diameter of the plastic pipe. The presser foot is formed to be slightly larger, the inner diameter thereof gradually increases toward the tip, and the engaging groove portion is provided on the inner peripheral surface so as to correspond to the engaging portion of the inner core portion. Use a ring to hold the phosphorus Insert the plastic pipe into the inner core part, and advance the tip side to at least the locking part on the front side of the inner core part to expand the diameter, and then fit the holding ring on the plastic pipe to the joint. The tip of the plastic tube and the tip of the holding ring are moved to the side surface of the flange by sliding the body toward the body.
【０００６】[0006]
【実施例】以下に、本発明方法を添付図面を参照しなが
ら説明する。図１〜図４において、鍔部２の一面側に雄
ねじ管部３が他面側にインナーコア部４が突設されてい
る継手本体１の該インナーコア部４にプラスチック管ｐ
を接続するに際して、そのプラスチック管ｐに嵌着し、
インナーコア部４との間にプラスチック管ｐを挾着して
締め付けできる後記押えリング５を用意する。The method of the present invention will be described below with reference to the accompanying drawings. 1 to 4, a male screw pipe portion 3 is provided on one surface side of a flange portion 2 and an inner core portion 4 is projectingly provided on the other surface side thereof.
To connect the plastic pipe p,
A holding ring 5 to be described later, which allows the plastic pipe p to be clamped between the inner core portion 4 and the inner core portion 4, is prepared.
【０００７】継手本体１のインナーコア部４は先端４ａ
側の外径がプラスチック管ｐの内径と等しいか若干大き
めに形成されていると共に、該インナーコア部４の外周
面上には複数個（図示の場合は２個）の係止部４ｂ１，
４ｂ２が手前側の係止部４ｂ１の頂部４ｃより鍔部２側
の係止部４ｂ２の頂部４ｃが順次高くなるように突設さ
れており、各頂部４ｃは面状で鈍角に形成されている。The inner core portion 4 of the joint body 1 has a tip 4a.
The outer diameter on the side is equal to or slightly larger than the inner diameter of the plastic pipe p, and a plurality of (two in the illustrated case) locking portions 4b 1 , on the outer peripheral surface of the inner core portion 4,
4b 2 is projected so that the top 4c of the locking portion 4b 2 on the flange 2 side is successively higher than the top 4c of the locking portion 4b 1 on the front side, and each top 4c is formed in a planar and obtuse angle. Has been done.
【０００８】図示の場合、インナーコア部４が底面側を
筒状とした円錐台を軸方向に連続させて並べた状態に形
成されていることで、インナーコア部４の外周面上に係
止部４ｂ１，４ｂ２が突設されるもので、これらの係止
部４ｂ１，４ｂ２の各頂部４ｃは、例えば円弧面等の湾
曲面（図２を参照）に形成されているが、これは図５に
示すように平面４ｄ−湾曲面４ｅ−平面４ｆと連続して
形成されている方がシール性の点で好ましい。In the case shown in the figure, the inner core portion 4 is formed by arranging cylindrical truncated cones having a bottom surface side in a line in the axial direction so that the inner core portion 4 is locked on the outer peripheral surface of the inner core portion 4. The portions 4b 1 and 4b 2 are provided in a protruding manner, and the respective top portions 4c of the locking portions 4b 1 and 4b 2 are formed, for example, on a curved surface such as an arc surface (see FIG. 2). As shown in FIG. 5, it is preferable that the flat surface 4d, the curved surface 4e, and the flat surface 4f are continuously formed in terms of sealing property.
【０００９】一方、押えリング５は縦手本体１に対して
接続時に手前側となる後端５ｂの内径が上記プラスチッ
ク管ｐの外径と等しいか若干大きめに形成されていると
共に、その内径は押えリング５の先端５ａに向かって次
第に増大し、かつ、内周面には上記インナーコア部４の
係止部４ｂ１，４ｂ２と対応させてテーパー面状の係止
溝部６ａ，６ｂが環状に設けられている。On the other hand, the holding ring 5 is formed such that the inner diameter of the rear end 5b, which is the front side when connected to the vertical body 1 is equal to or slightly larger than the outer diameter of the plastic pipe p, and the inner diameter is gradually increases toward the tip 5a of the pressing ring 5, and the inner peripheral surface engaging portion 4b 1 of the inner core portion 4 are, 4b 2 and corresponding to allowed by tapered surfaces shaped engaging grooves 6a, 6b cyclic It is provided in.
【００１０】そして、係止溝部６ａ，６ｂの壁部６ｃ
も、面状で鈍角とすることによりパイプ挿入時における
パイプの傷付きをより確実に防止することができ、例え
ば、円弧面等の湾曲面（特に図２を参照）に形成されて
いるのが好ましいが、これは図６に示すように平面６ｄ
−湾曲面６ｅ−平面６ｆと連続して形成されている方が
シール性の点で好ましい。Then, the wall portions 6c of the locking groove portions 6a and 6b.
Also, by making the surface of the pipe obtuse, it is possible to more reliably prevent damage to the pipe when the pipe is inserted, and for example, it is formed on a curved surface such as an arc surface (see especially FIG. 2). Preferably, this is a flat surface 6d as shown in FIG.
-The curved surface 6e-the flat surface 6f are preferably formed continuously from the viewpoint of sealing property.
【００１１】また、図２に示すように、インナーコア部
４に突設されている係止部４ｂ１，４ｂ２の頂部４ｃを
結ぶ線の角度をθ１、押えリング５の内周面の軸線方向
に沿った傾斜角度をθ２とすると、θ１＝θ２＋（０．
１〜２０）゜、好ましくはθ２＋（０．５〜１０）゜と
なるようにインナーコア部４と押えリング５が形成され
ている。また、係止用刻み部４ｂ１，４ｂ２と環状溝部
６ａ，６ｂを形成するための傾斜角度をそれぞれθ３，
θ４，θ５，θ６とすると、理論的にはθ３＝０．１〜
９０゜■θ５、θ４＝１〜９０゜■θ６であるが、これ
らの角度は実用的には１０〜７５゜が好ましい。この場
合、θ３≦θ４であることは勿論である。As shown in FIG. 2, the angle of the line connecting the tops 4c of the locking portions 4b 1 and 4b 2 protruding from the inner core portion 4 is θ 1 , and the inner peripheral surface of the presser ring 5 is If the inclination angle along the axial direction is θ 2 , θ 1 = θ 2 + (0.
The inner core portion 4 and the pressing ring 5 are formed so as to be 1 to 20) °, preferably θ 2 + (0.5 to 10) °. Further, the inclination angles for forming the locking notches 4b 1 and 4b 2 and the annular groove portions 6a and 6b are θ 3 , respectively.
Assuming θ 4 , θ 5 , and θ 6 , theoretically θ 3 = 0.1.
90 [deg.] * [Theta] 5 , [theta] 4 = 1-90 [deg.] [Theta] 6 , but these angles are preferably 10-75 [deg.] For practical purposes. In this case, of course, θ 3 ≦ θ 4 .
【００１２】先ず、プラスチック管ｐに押えリング５を
嵌着する。その後で、プラスチック管ｐをインナーコア
部４に挿入し、プラスチック管ｐの先端ｐ１を少なくと
もインナーコア部４の手前側の係止部４ｂ１まで前進さ
せて拡径させる（図３に示す段階）。なお、この際、プ
ラスチック管ｐとインナーコア部４間に潤滑剤を介在さ
せることが好ましい。次いで、プラスチック管ｐ上の押
えリング５を継手本体１側に向かって摺動させると、押
えリング５の先端５ａはプラスチック管ｐの拡径した外
表面部分にひっかかる（図４に示す段階）。First, the pressing ring 5 is fitted on the plastic pipe p. After that, the plastic pipe p is inserted into the inner core portion 4, and the tip p 1 of the plastic pipe p is advanced to at least the locking portion 4b 1 on the front side of the inner core portion 4 to expand the diameter (step shown in FIG. 3). ). At this time, it is preferable to interpose a lubricant between the plastic pipe p and the inner core portion 4. Next, when the holding ring 5 on the plastic pipe p is slid toward the joint body 1 side, the tip 5a of the holding ring 5 is caught on the enlarged outer surface portion of the plastic pipe p (step shown in FIG. 4).
【００１３】そして、プラスチック管ｐの先端ｐ１をひ
っかけた押えリング５を更に摺動して前進させ、この前
進動作によりプラスチック管ｐを押えリング５とともに
継手本体１側に移動させて、押えリング５とプラスチッ
ク管ｐの各先端５ａとｐ１を鍔部２の側面に当接させる
ことにより、インナーコア部４にプラスチック管ｐを緊
密に接続する作業は完了する。この接続が完了した時点
で、図１に示すように係止部４ｂ１，４ｂ２の頂部４ｃ
が係止溝部６ａ，６ｂにそれぞれ臨むようにすれば、接
続部のシール効果は一段と増大する。Then, the pressing ring 5 hooked with the tip p 1 of the plastic pipe p is further slid and moved forward, and by this forward movement, the plastic pipe p is moved to the joint body 1 side together with the pressing ring 5, and the pressing ring is moved. the 5 and the tip 5a and p 1 plastic pipe p to abut the side surface of the flange portion 2, the task of closely connect the plastic pipe p into the inner core portion 4 is completed. When this connection is completed, as shown in FIG. 1, the top portions 4c of the locking portions 4b 1 and 4b 2 are
The sealing effect of the connecting portion is further increased by allowing the locking groove portions 6a and 6b to face each other.
【００１４】以上説明の接続方法において、押えリング
５とプラスチック管ｐを継手本体１側へ向かって一緒に
摺動させる、少なくとも図４に示す段階からの作業に
は、継手本体１の鍔部２と押えリング５の後端５ｂの縁
を挾着して締め付けできる、例えばペンチやプライヤー
のような工具が用いられる。なお、継手本体１の雄ねじ
管部３は通常のように流体の供給口側に接続される。In the connection method described above, the collar portion 2 of the joint body 1 is required for at least the work from the stage shown in FIG. 4 in which the pressing ring 5 and the plastic pipe p are slid together toward the joint body 1. A tool such as pliers or pliers, which can clamp the edge of the rear end 5b of the holding ring 5 by tightening it, is used. The male screw tube portion 3 of the joint body 1 is connected to the fluid supply port side as usual.
【００１５】[0015]
【発明の効果】本発明は上記の如くであって、プラスチ
ック管をインナーコア部と押えリングの間に強固に挾着
して継手本体と緊密に接続できることは勿論、その接続
部を構成するには継手本体と押えリングの２部品を必要
とするだけであって、接続作業のより簡易化が可能とな
る。また、インナーコア部に突設されている係止部の頂
部は面状で鈍角に形成されているため、パイプ挿入時に
おけるパイプの傷付きを防止すると共に、シール完全化
を図ることができるもので、部品点数の節減による経済
的効果と相俟って、接続作業の合理化を図る上に極めて
有効である。According to the present invention as described above, the plastic pipe can be firmly sandwiched between the inner core portion and the pressing ring to be tightly connected to the joint body, and the connection portion can be constituted. Requires only two parts, the joint body and the presser ring, so that the connection work can be simplified. Further, since the top of the locking portion projecting from the inner core portion is formed in a plane shape and at an obtuse angle, it is possible to prevent damage to the pipe at the time of inserting the pipe and achieve a perfect seal. Therefore, combined with the economical effect of reducing the number of parts, it is extremely effective in rationalizing the connection work.
【図１】本発明方法を実施して構成されたプラスチック
管の接続部で、一部を切断して示す側面図である。FIG. 1 is a side view showing a connection part of a plastic pipe configured by carrying out the method of the present invention, with a part cut away.
【図２】本発明方法の実施に用いられる継手本体と押え
リングの要部を示す側断面図である。FIG. 2 is a side sectional view showing a main part of a joint body and a holding ring used for carrying out the method of the present invention.
【図３】本発明方法を実施した初期段階における構成部
を一部を切断して示す側面図である。FIG. 3 is a side view showing a part of a component part at an initial stage where the method of the present invention is carried out.
【図４】本発明方法を実施した中間段階における構成部
を一部を切断して示す側面図である。FIG. 4 is a side view showing a part of a component part at an intermediate stage where the method of the present invention is carried out.
【図５】本発明方法に用いられる継手本体のインナーコ
ア部における係止部の変形例を示す部分断面図である。FIG. 5 is a partial cross-sectional view showing a modified example of the locking portion in the inner core portion of the joint body used in the method of the present invention.
【図６】本発明方法に用いられる押えリングの係止溝部
の変形例を示す部分断面図である。FIG. 6 is a partial cross-sectional view showing a modified example of the engaging groove portion of the pressing ring used in the method of the present invention.
１は継手本体 ２は鍔部 ４はインナーコア部 ４ａは先端 ４ｂ１，４ｂ２は係止部 ４ｃは頂部 ５は押えリング ５ａは先端 ５ｂは後端 ６ａ，６ｂは係止溝部 ｐはプラスチック管 Ｐ１先端1 is a joint main body 2 is a collar portion 4 is an inner core portion 4a is a tip 4b 1 and 4b 2 is a locking portion 4c is a top portion 5 is a holding ring 5a is a tip 5b is a rear end 6a and 6b is a locking groove portion p is a plastic pipe P 1 tip
Claims (1)
れ、そのインナーコア部の先端側の外径は接続されるプ
ラスチック管の内径と等しいか若干大きめに形成され、
外周面上には複数個の係止部が鍔部側のものが反対側の
ものより順次高くなるように突設されている共に、各係
止部の頂部は面状で鈍角に形成されている継手本体と、
この継手本体に対して接続時に手前側となる後端の内径
は上記プラスチック管の外径と等しいか若干大きめに形
成されていると共に、その内径は先端に向かって次第に
増大し、かつ、内周面上には上記インナーコア部の係止
部と対応させて係止溝部が設けられている押えリングを
用いて、プラスチック管に押えリングを嵌着した後、そ
のプラスチック管をインナーコア部に挿入すると共に、
先端側は少なくともインナーコア部の手前側の係止部ま
で前進させて拡径させ、次いで、プラスチック管上の押
えリングを継手本体側に摺動させて、プラスチック管の
先端と押えリングの先端を鍔部の側面まで移動させるこ
とを特徴とするプラスチック管の接続方法。1. An inner core portion is projectingly provided on one surface side of the collar portion, and an outer diameter of a tip end side of the inner core portion is formed to be equal to or slightly larger than an inner diameter of a plastic pipe to be connected,
On the outer peripheral surface, a plurality of locking parts are projected so that the one on the flange side is successively higher than the one on the opposite side, and the top of each locking part is formed in a plane and obtuse angle. With a fitting body,
The inner diameter of the rear end, which is the front side when connected to this joint body, is formed to be equal to or slightly larger than the outer diameter of the plastic pipe, and the inner diameter gradually increases toward the tip, and the inner circumference Use a retaining ring that has a retaining groove on the surface that corresponds to the retaining portion of the inner core, and then insert the retaining ring into the plastic tube and then insert the plastic tube into the inner core. Along with
At the tip side, advance to at least the front locking part of the inner core part to expand the diameter, and then slide the holding ring on the plastic pipe to the joint body side to attach the tip of the plastic pipe to the tip of the holding ring. A method for connecting a plastic pipe, which is characterized in that it is moved to the side surface of the collar portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07524394A JP3395047B2 (en) | 1994-03-08 | 1994-03-08 | How to connect plastic tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07524394A JP3395047B2 (en) | 1994-03-08 | 1994-03-08 | How to connect plastic tubes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08170776A true JPH08170776A (en) | 1996-07-02 |
| JP3395047B2 JP3395047B2 (en) | 2003-04-07 |
Family
ID=13570597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07524394A Expired - Fee Related JP3395047B2 (en) | 1994-03-08 | 1994-03-08 | How to connect plastic tubes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3395047B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008020060A (en) * | 2006-03-14 | 2008-01-31 | Sumika Agrotech Co Ltd | Coupling for flexible hose |
| JP2015152064A (en) * | 2014-02-13 | 2015-08-24 | クボタシーアイ株式会社 | Conversion joint |
| JP2015166601A (en) * | 2014-03-03 | 2015-09-24 | クボタシーアイ株式会社 | Conversion joint |
| JP2021004629A (en) * | 2019-06-25 | 2021-01-14 | 未来工業株式会社 | Header for fluid pipe |
-
1994
- 1994-03-08 JP JP07524394A patent/JP3395047B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008020060A (en) * | 2006-03-14 | 2008-01-31 | Sumika Agrotech Co Ltd | Coupling for flexible hose |
| JP2015152064A (en) * | 2014-02-13 | 2015-08-24 | クボタシーアイ株式会社 | Conversion joint |
| JP2015166601A (en) * | 2014-03-03 | 2015-09-24 | クボタシーアイ株式会社 | Conversion joint |
| JP2021004629A (en) * | 2019-06-25 | 2021-01-14 | 未来工業株式会社 | Header for fluid pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3395047B2 (en) | 2003-04-07 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |