JP2602756B2 - How to install fittings - Google Patents
How to install fittingsInfo
- Publication number
- JP2602756B2 JP2602756B2 JP4125124A JP12512492A JP2602756B2 JP 2602756 B2 JP2602756 B2 JP 2602756B2 JP 4125124 A JP4125124 A JP 4125124A JP 12512492 A JP12512492 A JP 12512492A JP 2602756 B2 JP2602756 B2 JP 2602756B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- sleeve
- distal end
- pipe joint
- tip
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/04—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with a swivel nut or collar engaging the pipe
- F16L47/041—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with a swivel nut or collar engaging the pipe the plastic pipe end being flared either before or during the making of the connection
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】この発明は、ＰＦＡ樹脂（４フッ
化エチレン−パーフロロアルコキシ エチレン共重合樹
脂）製のチューブの先端部に、管継手を取付ける方法に
関する。The present invention relates to a PFA resin (4
Ethylene-perfluoroalkoxy ethylene copolymer tree
The present invention relates to a method of attaching a pipe joint to a distal end of a tube made of ( fat) .
【０００２】[0002]
【従来の技術】従来より、耐薬品性等が要求される配管
経路においては、ＰＦＡ樹脂からなるチューブや管継手
が採用されており、上記管継手として、図３に示すよう
に、チューブＴの先端部内周に無理嵌めされる補強用の
スリーブＳと、上記チューブＴの先端部外周に嵌挿され
る継手本体Ｈと、この継手本体Ｈの外周にねじ込まれる
ユニオンナットＮとを備え、上記ユニオンナットＮを継
手本体Ｈの外周にねじ込むことによって、シール部に密
封性を付与する構造のものが提供されている（例えば実
開平２−１１７４９４号公報参照）。2. Description of the Related Art Conventionally, tubes and pipe joints made of PFA resin have been employed in piping paths requiring chemical resistance and the like. As the pipe joint, as shown in FIG. A reinforcing sleeve (S) forcibly fitted on the inner periphery of the distal end portion, a joint body (H) fitted on the outer periphery of the distal end portion of the tube (T), and a union nut (N) screwed onto the outer periphery of the joint body (H); There is provided a structure in which N is screwed into the outer periphery of the joint body H to impart a sealing property to the seal portion (for example, see Japanese Utility Model Laid-Open No. 2-117494).
【０００３】上記の構造の管継手をチューブＴの先端部
に取付ける際には、チューブＴの先端部内周にスリーブ
Ｓをかなり大きい力で圧入する必要がある。これは、上
記スリーブＳによって、常温状態のチューブＴの先端部
を拡径する必要があるからである。そこで、上記管継手
の取付けに際しては、スリーブＳをチューブＴの先端内
周に機械的に圧入するための圧入装置が用いられてい
る。この圧入装置としては、一般に、チューブＴをクラ
ンプするクランプ機構と、スリーブＳを嵌挿した状態で
保持する圧入治具と、この圧入治具を機械的に押圧する
押圧機構とを備え、この押圧機構に、ラックとピニオン
或いはテコを利用した倍力機構を構成したものである
（例えば実開昭６２−１３４６２９号公報、実願平２−
６８９４８号参照）。[0003] When the pipe joint having the above structure is attached to the distal end of the tube T, it is necessary to press-fit the sleeve S into the inner periphery of the distal end of the tube T with a considerably large force. This is because it is necessary to expand the diameter of the distal end of the tube T in the normal temperature state by the sleeve S. Therefore, when installing the pipe joint, a press-fitting device for mechanically press-fitting the sleeve S into the inner periphery of the distal end of the tube T is used. The press-fitting device generally includes a clamp mechanism for clamping the tube T, a press-fitting jig for holding the sleeve S in a fitted state, and a pressing mechanism for mechanically pressing the press-fitting jig. The mechanism comprises a booster mechanism using a rack and a pinion or lever (for example, Japanese Utility Model Application Laid-Open No. Sho 62-134629, Japanese Utility Model Application No. Hei 2-134).
No. 68948).
【０００４】なお、上記スリーブＳとして、その先端部
とチューブＴの内周との間に液溜りＰ（図４参照）がで
きるのを回避するために、先端内周に面取りＣを施した
ものも提供されている（図５参照）。The sleeve S has a chamfer C on the inner periphery of the tip to avoid the formation of a liquid pool P (see FIG. 4) between the tip of the sleeve S and the inner periphery of the tube T. Are also provided (see FIG. 5).
【０００５】[0005]
【発明が解決しようとする課題】上記の構成の圧入装置
は、その構造上非常に大型になるため、狭い場所での配
管作業には使用できないという問題があった。また、チ
ューブＴのサイズが異なる毎に、チューブＴをクランプ
する治具や、圧入治具を装置から取外して交換する必要
があるので、配管作業の能率が悪いという問題があっ
た。しかも、チューブＴの先端部を常温状態で機械的に
拡径するので、チューブの中心方向に作用する内部応力
が残留した状態でスリーブが取付けられることになる。
このため、スリーブがチューブによって過度に締め付け
られて縮径してしまい、流路が狭まったりシール部分に
変形が生じたりするという問題もあった。The press-fitting device of the above construction has a problem that it cannot be used for piping work in a narrow place because it is very large in structure. In addition, every time the size of the tube T is different, it is necessary to remove the jig for clamping the tube T and the press-fitting jig from the apparatus and replace them. In addition, since the diameter of the distal end of the tube T is mechanically expanded at room temperature, the sleeve can be mounted in a state where the internal stress acting in the center direction of the tube remains.
For this reason, there has been a problem that the sleeve is excessively tightened by the tube and is reduced in diameter, so that the flow path is narrowed or the seal portion is deformed.
【０００６】さらに、スリーブＳの先端内周に面取りＣ
を施したものについては、スリーブＳの先端外径Ｄがチ
ューブＴの内径ｄよりも大きくなることから、圧入作業
が非常に困難であるという問題があった。この発明は上
記問題点に鑑みてなされたものであり、狭い場所でも配
管作業を行うことができると共に、流路が狭まったりシ
ール部分に変形が生じたりするおそれがなく、チューブ
Ｔのサイズが異なる場合にも容易に対応でき、しかも、
チューブＴの内径ｄよりもスリーブＳの先端外径Ｄが大
きい場合でも、チューブＴ内にスリーブＳを容易に嵌め
込むことができる管継手の取付け方法を提供することを
目的とする。Further, a chamfer C is formed on the inner periphery of the tip of the sleeve S.
However, since the outer diameter D of the distal end of the sleeve S becomes larger than the inner diameter d of the tube T, there is a problem that the press-fitting operation is very difficult. The present invention has been made in view of the above problems, and can perform piping work even in a narrow place, and there is no possibility that the flow path is narrowed or the seal portion is deformed, and the size of the tube T is different. Can be easily handled, and
It is an object of the present invention to provide a method of mounting a pipe joint in which the sleeve S can be easily fitted into the tube T even when the outer diameter D of the distal end of the sleeve S is larger than the inner diameter d of the tube T.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
のこの発明の管継手の取付け方法としては、ＰＦＡ樹脂
製のチューブの先端部内周に無理嵌めされる補強用のス
リーブと、上記チューブの先端部外周に嵌挿される継手
本体と、継手本体の外周にねじ込んでシール部に密封性
を付与するユニオンナットとを備える管継手を、上記チ
ューブの先端部に取付ける方法であって、上記チューブ
の先端部を１５０〜２５０°Ｃの温度範囲内で加熱して
軟化させた状態で、当該先端部の内周に、上記スリーブ
の外周形状と略同一形状の予備成形治具を挿入して、上
記スリーブの外周形状に略近似する形状にチューブの先
端部を膨出成形した後、上記予備成形治具を抜脱してス
リーブを嵌入することを特徴とするものである。In order to achieve the above object, a method of mounting a pipe joint according to the present invention includes: a reinforcing sleeve which is forcibly fitted to the inner periphery of a distal end portion of a tube made of PFA resin; A method of attaching a pipe joint comprising a joint body fitted around the outer periphery of a distal end portion and a union nut which is screwed to the outer periphery of the joint main body to impart a sealing property to the seal portion, to the distal end portion of the tube, comprising: In a state where the tip is heated and softened within a temperature range of 150 to 250 ° C., a preforming jig having substantially the same shape as the outer shape of the sleeve is inserted into the inner periphery of the tip, and After the tip of the tube is bulged to a shape substantially similar to the outer peripheral shape of the sleeve, the preforming jig is withdrawn and the sleeve is fitted.
【０００８】[0008]
【作用】上記の構成の管継手の取付け方法によれば、チ
ューブの先端部を加熱軟化させてスリーブの外周形状に
略近似する形状に膨出成形するので、スリーブを当該先
端部へ軽い力で嵌入することができる。従って、スリー
ブの嵌入作業を従来の圧入装置を用いることなく人手に
より行うことができる。また、上記１５０〜２５０°Ｃ
の温度範囲内での加熱軟化によって、ＰＦＡ樹脂製のチ
ューブに局所的な溶融を生じることなく、当該樹脂の分
子の配列を変えて、チューブの膨出成形部に生じる中心
方向への内部応力を効果的に除去することができる。According to the method for mounting a pipe joint having the above-described structure, the distal end of the tube is heated and softened to bulge into a shape substantially similar to the outer peripheral shape of the sleeve. Can be fitted. Therefore, the work of inserting the sleeve can be performed manually without using a conventional press-fitting device. In addition, the above 150-250 ° C
By heat softening in a temperature range of, PFA resin Ji
By changing the arrangement of the molecules of the resin without causing local melting in the tube, it is possible to effectively remove the internal stress generated in the bulging portion of the tube toward the center.
【０００９】さらに、チューブのサイズが異なる場合で
も、上記予備成形治具を換えるだけで容易に対処するこ
とができる。Further, even when the size of the tube is different, it can be easily dealt with only by changing the preforming jig.
【００１０】[0010]
【実施例】以下実施例を示す添付図面によって詳細に説
明する。図１は、この発明の管継手の取付け方法を示す
工程図であり、まず、図１（ａ）に示すように、ＰＦＡ
樹脂からなるチューブＴを必要な長さに切断し、ユニオ
ンナットＮを当該チューブＴに差し込んでおく。BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a process diagram showing a method of mounting a pipe joint according to the present invention. First, as shown in FIG.
The tree butter or Ranaru tube T is cut to the required length, should plug the union nut N to the tube T.
【００１１】次に、チューブＴの先端部を熱風ドライヤ
ー等により均一に加熱して、当該先端部を軟化させる。
このチューブＴの加熱温度としては、１５０〜２５０°
Ｃが最適である。そして、図１（ｂ）に示すように、上
記加熱軟化したチューブＴの先端部内周に、すばやく予
備成形治具１を差し込む。この予備成形治具１の成形部
は、補強用のスリーブＳの外周形状と略同一形状のもの
である。上記予備成形治具１は、その基端部に形成され
たストッパ１ａに対してチューブＴの先端面が突き当た
るまで差し込む。そして、この状態で数秒間チューブＴ
を放冷する。以上により、チューブＴの先端部が、スリ
ーブＳの外周と略近似する形状に膨出成形される。Next, the distal end of the tube T is uniformly heated by a hot air drier or the like to soften the distal end.
The heating temperature of the tube T is 150 to 250 °
C is optimal. Then, as shown in FIG. 1B, the preforming jig 1 is quickly inserted into the inner periphery of the distal end portion of the tube T which has been heated and softened. The forming portion of the preforming jig 1 has substantially the same shape as the outer peripheral shape of the reinforcing sleeve S. The preforming jig 1 is inserted until the distal end surface of the tube T abuts against a stopper 1a formed at the base end. Then, in this state, the tube T
Allow to cool. As described above, the distal end portion of the tube T is bulged and formed into a shape substantially similar to the outer periphery of the sleeve S.
【００１２】その後、チューブＴから予備成形治具１を
抜取り、図１（ｃ）に示すように、スリーブＳを上記膨
出成形されたチューブＴの先端部に嵌入する。この際、
チューブＴの先端部がスリーブＳの外周形状に近似する
形状に膨出成形されているので、スリーブＳを人手によ
り軽い力で容易に嵌入することができる。次いで、必要
によりチューブＴの先端部を再度加熱してスリーブＳに
チューブＴを沿わせ、チューブＴが常温まで冷えた時点
で、図１（ｄ）に示すように、チューブＴの外周に継手
本体Ｈを差し込む。Thereafter, the preforming jig 1 is removed from the tube T, and the sleeve S is fitted into the tip of the bulged tube T as shown in FIG. On this occasion,
Since the distal end of the tube T is bulged into a shape approximating the outer peripheral shape of the sleeve S, the sleeve S can be easily fitted manually with a light force. Next, if necessary, the distal end portion of the tube T is heated again to bring the tube T along the sleeve S, and when the tube T has cooled down to room temperature, as shown in FIG. Insert H.
【００１３】そして、図１（ｅ）に示すようにユニオン
ナットＮを手によって上記継手本体Ｈの外周にねじ込
み、最終的にスパナ等で上記ユニオンナットＮを締めつ
けて、管継手の１次シール部２および２次シール部３に
密封性を付与する。なお、上記スリーブＳ、継手本体Ｈ
及びユニオンナットＮとしては、それぞれＰＦＡ樹脂等
の合成樹脂からなるものが用いられる。Then, as shown in FIG. 1 (e), the union nut N is screwed into the outer periphery of the joint main body H by hand, and the union nut N is finally tightened with a spanner or the like, so that the primary seal portion of the pipe joint is tightened. The second and secondary seal portions 3 are provided with sealing properties. The sleeve S and the joint body H
As the union nut N, one made of a synthetic resin such as a PFA resin is used.
【００１４】このように、上記管継手の取付け方法によ
れば、従来の圧入装置が不要であるので、狭い場所でも
管継手をチューブＴに取付けることができる。しかも、
チューブＴのサイズが異なる場合でも、上記予備成形治
具１を交換するだけでよいので、管継手を能率よく取付
けることができる。さらに、チューブＴの先端部を、１
５０〜２５０°Ｃの温度範囲内で加熱軟化した状態で膨
出成形するので、チューブＴに局所的な溶融を生じるこ
となく、当該樹脂の分子の配列を変えて、チューブＴの
膨出成形部に生じる中心方向への内部応力を効果的に除
去することができる。このため、上記スリーブＳがチュ
ーブＴによって過度に締め付けられて縮径するのを防止
することができ、ひいては、流路が狭まったりシール部
分の変形が生じたりするのを防止することができる。な
お、上記加熱軟化温度が、２５０°Ｃを超えると、チュ
ーブＴの素材であるＰＦＡ樹脂が局所的に溶融して、当
該チューブＴの膨出成形部に穴が開く虞れがある。ま
た、加熱軟化温度が１５０°Ｃよりも低いと、チューブ
Ｔの均一且つ完全な軟化が望めず、内部応力、残留応力
の除去が不十分になる。 As described above, according to the above-described method of mounting the pipe joint, the conventional press-fitting device is unnecessary, so that the pipe joint can be mounted on the tube T even in a narrow place. Moreover,
Even when the size of the tube T is different, it is only necessary to replace the preforming jig 1, so that the pipe joint can be efficiently attached. Further, the leading end of the tube T, 1
Since swelling molding is performed in a temperature softened state within a temperature range of 50 to 250 ° C. , local melting of the tube T may occur.
And without changing the arrangement of the molecules of the resin, the tube T
Efficiently eliminates internal stress in the bulging part toward the center.
You can leave. For this reason, it is possible to prevent the sleeve S from being excessively tightened by the tube T and reduced in diameter, thereby preventing the flow path from being narrowed and the seal portion from being deformed. What
If the heating softening temperature exceeds 250 ° C.,
The PFA resin, which is the material of
There is a possibility that a hole may be formed in the bulging portion of the tube T. Ma
If the heating softening temperature is lower than 150 ° C, the tube
Uniform and complete softening of T cannot be expected, internal stress, residual stress
Removal becomes insufficient.
【００１５】この発明の管継手の取付け方法は、アウタ
ーリングＡを用いて密封性を確保する構造の管継手（図
２参照）の取付け方法にも勿論適用することができる。
また、予備成形治具１にヒータを内蔵し、この予備成形
治具１からの熱伝導によって上記チューブＴを加熱軟化
させながら、予備成形治具１をチューブＴに挿入しても
よい。The method for mounting a pipe joint according to the present invention can of course be applied to a method for mounting a pipe joint (see FIG. 2) having a structure that ensures the sealing performance by using the outer ring A.
Further, a heater may be built in the preforming jig 1, and the preforming jig 1 may be inserted into the tube T while the tube T is heated and softened by heat conduction from the preforming jig 1.
【００１６】[0016]
【発明の効果】以上のように、この発明の管継手の取付
け方法によれば、ＰＦＡ樹脂からなるチューブの先端部
をスリーブの外周形状に略近似する形状に膨出成形した
後、当該先端部にスリーブを嵌入するので、スリーブを
従来の圧入装置を用いることなく、チューブの先端部内
周に容易に嵌入することができる。このため、狭い場所
での配管作業を支障なく行うことができる。As described above, according to the pipe joint mounting method of the present invention, the tip of the tube made of PFA resin is bulged into a shape substantially similar to the outer peripheral shape of the sleeve, and then the tip of the tube is formed. Since the sleeve is inserted into the tube, the sleeve can be easily inserted into the inner periphery of the distal end portion of the tube without using a conventional press-fitting device. For this reason, piping work in a narrow place can be performed without hindrance.
【００１７】また、チューブのサイズが異なる場合で
も、予備成形治具を換えるだけで容易に対処することが
でき、取付け作業を能率よく行うことができる。しか
も、チューブの先端部を１５０〜２５０°Ｃの温度範囲
内で加熱軟化した状態で膨出成形するので、チューブに
局所的な溶融を生じることなく、当該樹脂の分子の配列
を変えて、チューブの膨出成形部に生じる中心方向への
内部応力を効果的に除去することができる。このため、
スリーブがチューブによって過度に締め付けられて縮径
するのを防止することができる結果、流路が狭まったり
シール部分の変形が生じたりするのを防止することがで
きる。さらに、内周先端が面取りされているスリーブに
ついても、チューブに容易に嵌入することができる。Further, even if the tube size is different, it can be easily dealt with only by changing the preforming jig, and the mounting operation can be performed efficiently. In addition, the temperature range of the tube tip is 150-250 ° C.
Since it is swelled and molded while heated and softened inside,
By changing the arrangement of the molecules of the resin without causing local melting ,
Internal stress can be effectively removed. For this reason,
As a result of preventing the sleeve from being excessively tightened by the tube and reduced in diameter, it is possible to prevent the flow path from being narrowed and the seal portion from being deformed. Furthermore, the sleeve whose inner peripheral end is chamfered can be easily fitted into the tube.
【図１】この発明の管継手の取付け方法を示す工程図で
ある。FIG. 1 is a process chart showing a method of mounting a pipe joint according to the present invention.
【図２】この発明に用いられる管継手の一例を示す断面
図である。FIG. 2 is a sectional view showing an example of a pipe joint used in the present invention.
【図３】この発明に用いられる管継手の他の例を示す断
面図である。FIG. 3 is a sectional view showing another example of the pipe joint used in the present invention.
【図４】スリーブの一例を示す断面図である。FIG. 4 is a sectional view showing an example of a sleeve.
【図５】スリーブの他の例を示す断面図である。FIG. 5 is a sectional view showing another example of the sleeve.
Ｔ チューブ Ｓ スリーブ Ｎ ユニオンナット Ｈ 継手本体 １ 予備成形治具 T tube S sleeve N Union nut H Joint body 1 Pre-forming jig
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−168495（ＪＰ，Ａ) 特開 昭53−40080（ＪＰ，Ａ) 実公 平１−25839（ＪＰ，Ｙ２) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-168495 (JP, A) JP-A-53-40080 (JP, A) JP-A-1-25839 (JP, Y2)
Claims (1)
理嵌めされる補強用のスリーブと、 上記チューブの先端部外周に嵌挿される継手本体と、継
手本体の外周にねじ込んでシール部に密封性を付与する
ユニオンナットとを備える管継手を、上記チューブの先
端部に取付ける方法であって、 上記チューブの先端部を１５０〜２５０°Ｃの温度範囲
内で加熱して軟化させた状態で、当該先端部の内周に、
上記スリーブの外周形状と略同一形状の予備成形治具を
挿入して、上記スリーブの外周形状に略近似する形状に
チューブの先端部を膨出成形した後、上記予備成形治具
を抜脱してスリーブを嵌入することを特徴とする管継手
の取付け方法。1. A reinforcing sleeve which is forcibly fitted to the inner periphery of the distal end of a tube made of PFA resin, a joint body which is inserted around the outer periphery of the distal end of the tube, and screwed into the outer periphery of the joint body to seal the seal portion. A method of attaching a pipe joint having a union nut imparting property to a distal end of the tube, wherein the distal end of the tube has a temperature range of 150 to 250 ° C.
In the state of being heated and softened in the inside of the tip,
After inserting a preforming jig having substantially the same shape as the outer peripheral shape of the sleeve and bulging the tip of the tube to a shape substantially similar to the outer peripheral shape of the sleeve, the preforming jig is pulled out. A fitting method for a pipe joint, wherein a sleeve is fitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4125124A JP2602756B2 (en) | 1992-05-18 | 1992-05-18 | How to install fittings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4125124A JP2602756B2 (en) | 1992-05-18 | 1992-05-18 | How to install fittings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05322091A JPH05322091A (en) | 1993-12-07 |
| JP2602756B2 true JP2602756B2 (en) | 1997-04-23 |
Family
ID=14902446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4125124A Expired - Fee Related JP2602756B2 (en) | 1992-05-18 | 1992-05-18 | How to install fittings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2602756B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019152339A (en) * | 2019-06-19 | 2019-09-12 | 日本ピラー工業株式会社 | Resin pipe joint |
| JP2019178783A (en) * | 2019-06-19 | 2019-10-17 | 日本ピラー工業株式会社 | Resin pipe joint |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69825786T2 (en) * | 1998-11-05 | 2005-08-18 | Nippon Pillar Packing Co., Ltd. | PIPE CONNECTION FROM RESIN |
| JP2022017782A (en) * | 2020-07-14 | 2022-01-26 | 日本ピラー工業株式会社 | Inner ring and pipe joint |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6425839U (en) * | 1987-08-06 | 1989-02-14 |
-
1992
- 1992-05-18 JP JP4125124A patent/JP2602756B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019152339A (en) * | 2019-06-19 | 2019-09-12 | 日本ピラー工業株式会社 | Resin pipe joint |
| JP2019178783A (en) * | 2019-06-19 | 2019-10-17 | 日本ピラー工業株式会社 | Resin pipe joint |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05322091A (en) | 1993-12-07 |
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