JPH05322083A - Coupling - Google Patents
CouplingInfo
- Publication number
- JPH05322083A JPH05322083A JP14896792A JP14896792A JPH05322083A JP H05322083 A JPH05322083 A JP H05322083A JP 14896792 A JP14896792 A JP 14896792A JP 14896792 A JP14896792 A JP 14896792A JP H05322083 A JPH05322083 A JP H05322083A
- Authority
- JP
- Japan
- Prior art keywords
- peripheral surface
- resin pipe
- folded
- fastener
- annular portion
- 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.)
- Pending
Links
- 230000008878 coupling Effects 0.000 title abstract 5
- 238000010168 coupling process Methods 0.000 title abstract 5
- 238000005859 coupling reaction Methods 0.000 title abstract 5
- 239000011347 resin Substances 0.000 claims abstract description 33
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 230000002093 peripheral effect Effects 0.000 claims abstract description 29
- 238000002788 crimping Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 12
- -1 polytetrafluoroethylene Polymers 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 4
- 230000002939 deleterious effect Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Joints With Pressure Members (AREA)
- Joints That Cut Off Fluids, And Hose Joints (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、主として半導体生産
等のいわゆるハイテック分野で高温高圧の劇物流体を移
送する配管システムに使用する樹脂製の継ぎ手に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin joint used for a piping system for transferring a high-temperature and high-pressure deleterious fluid mainly in the so-called high-tech field such as semiconductor production.
【０００２】[0002]
【従来技術とその課題】プラスチックパイプ（チュ−ブ
を含む）の継ぎ手機構には、耐密テ−パネジ、フェル−
ルの使用、その他各種の耐密構造が知られている。しか
しながら、たとえばＴＦＥ（ポリテトラフルオロエチレ
ン）、ＰＦＡ（ポリテトラフルオロエチレンとパ−フル
オロアルキルビニ−ルエ−テルの共重合体）、ＦＥＰ
（ポリテトラフルオロプロピレンの共重合体）等のフッ
素樹脂では、その特性により、使用される液体が高温、
高圧の劇物等が多く、熱サイクルによる膨張収縮の繰り
返し、クリ−プ発生等の要因により流体のリ−クが発生
する。2. Description of the Related Art A joint mechanism for a plastic pipe (including a tube) includes a tight taper screw and a screw.
It is known that various types of tight-fitting structures are used. However, for example, TFE (polytetrafluoroethylene), PFA (copolymer of polytetrafluoroethylene and perfluoroalkyl vinyl ether), FEP
In a fluororesin such as (copolymer of polytetrafluoropropylene), due to its characteristics, the liquid used has a high temperature,
There are many high-pressure deleterious substances, and fluid leakage occurs due to factors such as repeated expansion and contraction due to thermal cycles and generation of creep.
【０００３】これは、主として接合部に上記要因による
微小な隙間が発生するためで、この防止は極めて困難で
ある。それ故、従来の継ぎ手類では流体の温度１２０
℃、圧力２Ｋｇ／c 程度以下の条件での使用を余儀な
くされる。This is because a minute gap is generated mainly in the joint portion due to the above factors, and it is extremely difficult to prevent this. Therefore, in conventional fittings, the fluid temperature is 120
It is inevitable to use it under the conditions of ℃ and pressure of 2Kg / c or less.
【０００４】[0004]
【課題を解決するための手段】この発明に係る継ぎ手
は、外側環状部および内側環状部を有する締具と、内側
周面にストッパ部を有するとともに締具の前記外側環状
部と内側環状部との間に螺合され、ストッパ部と前記内
側環状部の端縁との間で樹脂パイプの折り返し部分を圧
着挟持する継ぎ手本体とで構成し、前記締具は、外側環
状部の内周面にネジ部を形成する一方、内側環状部には
樹脂パイプの折り返し部分がはまり合う凹部を周設する
とともにこの凹部端には継ぎ手本体の内側面に密着する
リップシールを周設し、前記継ぎ手本体は、外周面に前
記外側環状部のネジ部に螺合するネジ部を形成する一
方、内周面には開口部から順次縮径するテーパー部とこ
れに連続するストレート部を形成するとともに前記スト
ッパ部において樹脂パイプの折り返し頂部が当接する部
分には曲面溝部を形成し、さらに、締具の内側環状部に
おける前記凹部の周面には樹脂パイプの折り返し部分に
当接してこれをより堅固に係止するための突条帯を周設
して、上記従来の課題を解決しようとするものである。A joint according to the present invention includes a fastener having an outer annular portion and an inner annular portion, a stopper portion on an inner peripheral surface, and the outer annular portion and the inner annular portion of the fastener. And a joint body that is crimped and sandwiched between the stopper portion and the end edge of the inner annular portion by crimping and sandwiching the folded portion of the resin pipe, and the fastener is provided on the inner peripheral surface of the outer annular portion. While forming the threaded portion, the inner annular portion is provided with a concave portion around which the folded-back portion of the resin pipe fits, and at the end of the concave portion, a lip seal that closely adheres to the inner surface of the joint main body is provided. The outer peripheral surface is formed with a threaded portion that is screwed into the outer annular threaded portion, while the inner peripheral surface is formed with a tapered portion that is gradually reduced in diameter from the opening and a straight portion that is continuous with the tapered portion. At the resin A curved groove portion is formed at a portion where the folded back top of the fastener abuts, and further, a folded portion of the resin pipe is abutted on the peripheral surface of the recessed portion of the inner annular portion of the fastener so that the resin pipe is locked more firmly. In order to solve the above-mentioned conventional problems, the ridge strips of (1) are provided around.
【０００５】[0005]
【作用】この発明に係る継ぎ手において、折り返されて
Ｕ字状に形成された樹脂パイプの先端部分は締具の内側
環状部に係合され、締具と継ぎ手本体との螺合により、
内側環状部の凹部に位置する樹脂パイプの折り返し部分
はそのＵ字状の底部が内側環状部の端縁とストッパ部の
曲面溝とにより密着固定され、さらに突条帯は樹脂パイ
プ折り返し部分の継ぎ手本体内側面と凹部外周面との密
着を強化するとともに、リップシールは継ぎ手本体の内
側面と締具の内側環状部の内周面との密着度をより強固
名ものとし、従来の継ぎ手における流体の温度条件、圧
力条件を大幅に上回る許容範囲にあっても漏洩等の問題
はなんら発生することがなく極めて信頼性の高い樹脂特
にフッ素樹脂パイプ用の継ぎ手を実現することができ
る。In the joint according to the present invention, the tip portion of the resin pipe which is folded back and formed in a U shape is engaged with the inner annular portion of the fastener, and by screwing the fastener and the joint body,
The U-shaped bottom portion of the folded portion of the resin pipe located in the concave portion of the inner annular portion is closely fixed by the edge of the inner annular portion and the curved groove of the stopper portion, and the ridge strip is a joint of the folded portion of the resin pipe. In addition to strengthening the close contact between the inner surface of the body and the outer peripheral surface of the recess, the lip seal further strengthens the degree of close contact between the inner surface of the joint body and the inner peripheral surface of the inner annular portion of the fastener, and Even if the temperature and pressure conditions are within the permissible range, the problems such as leakage do not occur at all, and it is possible to realize a highly reliable joint for a resin, particularly a fluororesin pipe.
【０００６】[0006]
【実施例】図面に基ずいてこの発明の実施例を説明す
る。図１ないし図３は、この考案の１実施例を示す図で
ある。図１において、１は、外側環状部１ａ、内側環状
部１ｂを有する筒状をなすフッ素樹脂製の締具で、外側
環状部１ａの内周面にはネジ部１ｃが形成されている。
２は、前記締具に螺合する筒状をなすフッ素樹脂製の
継ぎ手本体で、内側面に開口部から順次縮径するテーパ
ー部２ａとこれに連続するストレート部２ｂを有し、こ
のストレート部２ｂの終端近傍にはストッパ部７が形成
されている一方、外側面には前記ネジ部１ｃに螺合する
ネジ部２ｃが形成されている。４は、フッ素樹脂パイプ
で、その先端にはＵ字状の折り返し部分４ａが形成さ
れ、折り返し部分４ａの頂部４ｂは継ぎ手本体２におけ
る後述の曲面溝７ａにはまり合っている。なお、３は継
ぎ手本体２を螺合装着したポンプである。Embodiments of the present invention will be described with reference to the drawings. 1 to 3 are views showing an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a tubular fluororesin fastener having an outer annular portion 1a and an inner annular portion 1b, and a screw portion 1c is formed on the inner peripheral surface of the outer annular portion 1a.
Reference numeral 2 denotes a tubular fluororesin joint body that is screwed into the fastener, and has a taper portion 2a on the inner side surface of which the diameter is gradually reduced from the opening and a straight portion 2b continuous with the tapered portion 2a. A stopper portion 7 is formed near the end of 2b, while a screw portion 2c that is screwed into the screw portion 1c is formed on the outer side surface. Reference numeral 4 denotes a fluororesin pipe, and a U-shaped folded-back portion 4a is formed at the tip thereof, and a top portion 4b of the folded-back portion 4a fits in a curved groove 7a of the joint body 2 described later. Reference numeral 3 is a pump in which the joint body 2 is screwed.
【０００７】図２は、締具１の切断端面拡大図であり、
図に示すように、内側環状部１ｂの外周面には、樹脂パ
イプ４の折り返し部分４ａの収納部としての凹部８が形
成され、この凹部８端部には舌状のリップシール５が周
設されている。図３は、継ぎ手本体２の切断部端面拡大
図であり、図に示すようにストッパ部７の底部には断面
Ｕ字状の曲面溝７ａが形成され前記の頂部４ｂがはまり
合うようになっている。FIG. 2 is an enlarged view of a cut end surface of the fastener 1.
As shown in the figure, a concave portion 8 is formed on the outer peripheral surface of the inner annular portion 1b as a storage portion for the folded portion 4a of the resin pipe 4, and a tongue-shaped lip seal 5 is provided around the end portion of the concave portion 8. Has been done. FIG. 3 is an enlarged view of an end surface of a cut portion of the joint body 2. As shown in the drawing, a curved groove 7a having a U-shaped cross section is formed at the bottom of the stopper portion 7 so that the top portion 4b is fitted. There is.
【０００８】次に、この実施例に係る継ぎ手を組み立て
手順を説明する。まず、締具１に先端をＵ字形状に折り
返したフッ素樹脂パイプ４を通し、パイプ４の折り返し
部分４ａの頂部４ｂを継ぎ手本体２における曲面溝７ａ
にはめ込む。次いで、締具１を継ぎ手本体２に螺合す
る。締具１は、螺合の進行につれて下降してゆくが、側
方にやや突出しているリップシール５はテーパー部２ａ
が形成されているため継ぎ手本体２の内面に引掛かるこ
となく順次下降する。一方、締具１の下降につれて、内
側環状部１ｂはパイプ４のＵ字状折り返し部分の間隙に
進入し、締具１の締結完了に伴い先端部が曲面溝７ａと
の間で頂部４ｂを圧着挟持し、パイプ４内部からの流体
の漏洩を完全に遮断する。Next, the procedure for assembling the joint according to this embodiment will be described. First, the fastener 1 is passed through a fluororesin pipe 4 whose tip is folded back into a U shape, and the top portion 4b of the folded portion 4a of the pipe 4 is curved into the curved groove 7a in the joint body 2.
Inset. Next, the fastener 1 is screwed onto the joint body 2. The fastener 1 descends as the screwing progresses, but the lip seal 5 slightly protruding laterally has a taper portion 2a.
Since it is formed, the joint body 2 descends sequentially without being caught on the inner surface of the joint body 2. On the other hand, as the fastener 1 descends, the inner annular portion 1b enters the gap between the U-shaped folded portions of the pipe 4, and when the fastening of the fastener 1 is completed, the tip portion crimps the top portion 4b with the curved groove 7a. It clamps and completely blocks the leakage of fluid from the inside of the pipe 4.
【０００９】この状態でパイプ４の折り返し部分４ａは
内側環状部１ｂの凹部８に位置するが、突帯部６により
折り返し部分４ａは、継ぎ手本体２の内側面と凹部８の
壁面に強固に当接する。また、前記リップシール５も継
ぎ手本体２の内周面に強固に密着し、仮に頂部４ｂと曲
面溝７ａとの間に流体の漏洩があってもこれの継ぎ手外
部への漏洩は完全に防止されることになる。In this state, the folded-back portion 4a of the pipe 4 is located in the concave portion 8 of the inner annular portion 1b, but the folded-back portion 4a is firmly brought into contact with the inner side surface of the joint body 2 and the wall surface of the concave portion 8 by the protruding portion 6. .. Further, the lip seal 5 also firmly adheres to the inner peripheral surface of the joint body 2, and even if fluid leaks between the top portion 4b and the curved groove 7a, the leakage of the fluid to the outside of the joint is completely prevented. Will be.
【００１０】なお、フッ素樹脂パイプ４先端の折り返し
は、専用の治具をもちいてなすが、パイプの肉厚の大き
く折り返しが困難な場合には先端の端面に周状の深い切
れ目を入れ、２層または複数層を形成してなすと容易に
折り返しが可能である。The tip of the fluororesin pipe 4 is folded back by using a dedicated jig. However, if the pipe is too thick and it is difficult to fold it, a deep circumferential cut is made on the end face of the tip. It can be easily folded back by forming a layer or a plurality of layers.
【００１１】図４は、この発明の他の実施例を示す図で
ある。この実施例はパイプ相互を接続する場合を示して
いる。この実施例において、継ぎ手本体２がストッパ部
７を中心に上下対称の構造になっている他は前述の実施
例と全く同様である。FIG. 4 is a diagram showing another embodiment of the present invention. In this embodiment, pipes are connected to each other. This embodiment is exactly the same as the above-mentioned embodiment except that the joint body 2 is vertically symmetrical with respect to the stopper portion 7.
【００１２】図５は、この発明のさらに他の実施例を示
す図である。この実施例にあっては、パイプ４の先端部
分は、図示のように外側に丸め込むような状態で折り返
されている。そして、この○状の折り返し部分は内側環
状部１ｂの端部と頂部４ｂとにより圧着挟持されるよう
になっている。その他の構成は上述の実施例と同様であ
る。FIG. 5 is a diagram showing still another embodiment of the present invention. In this embodiment, the tip portion of the pipe 4 is folded back so as to be rolled outward as shown in the drawing. The circled folded portion is crimped and clamped by the end of the inner annular portion 1b and the top portion 4b. Other configurations are the same as those in the above-mentioned embodiment.
【００１３】[0013]
【発明の効果】この発明は、以上説明した構成作用によ
り、従来の樹脂継ぎ手の有する大きな欠点であるクリー
プ現象による漏洩を完全に防止し、さらに従来簡便かつ
有効な接続手段の見当たらなかったフッ素樹脂パイプの
接続を極めて簡単に行なうことができる。The present invention, by virtue of the above-described constitutional effects, completely prevents leakage due to the creep phenomenon, which is a major drawback of conventional resin joints, and has not yet found a simple and effective connecting means. The pipe connection can be made very easily.
【図１】 この発明に係る１実施例を示す断面
図である。FIG. 1 is a sectional view showing one embodiment according to the present invention.
【図２】 同上実施例に係る締具の切断部端面
拡大図である。FIG. 2 is an enlarged view of an end face of a cutting portion of the fastener according to the above embodiment.
【図３】 図１における継ぎ手本体の切断部端
面拡大図である。FIG. 3 is an enlarged view of an end face of a cut portion of the joint body in FIG.
【図４】 この発明の他の実施例を示す断面図
である。FIG. 4 is a sectional view showing another embodiment of the present invention.
【図５】 この発明のさらに他の実施例を示す
断面図である。FIG. 5 is a sectional view showing still another embodiment of the present invention.
１ 締具 １ａ 外側環状部 １ｂ 内側環状部 １ｃ ネジ部 ２ 継ぎ手本体 ２ａ テーパー部 ２ｂ ストレート部 ２ｃ ネジ部 ３ ポンプ ４ パイプ ４ａ 折り返し部分 ４ｂ 頂部 ５ リップシール ６ 突条帯 ７ ストッパ部 ７ａ 曲面溝 ８ 凹部 1 Fastener 1a Outer annular part 1b Inner annular part 1c Screw part 2 Joint body 2a Tapered part 2b Straight part 2c Screw part 3 Pump 4 Pipe 4a Folding part 4b Top part 5 Lip seal 6 Ridge strip 7 Stopper part 7a Curved groove 8 Recessed part
【手続補正書】[Procedure amendment]
【提出日】平成４年１２月１日[Submission date] December 1, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Name of item to be corrected] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【書類名】 明細書[Document name] Statement
【発明の名称】 継ぎ手[Title of Invention] Joint
【特許請求の範囲】[Claims]
【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、主として半導体生産
等のいわゆるハイテック分野で高温高圧の劇物流体を移
送する配管システムに使用する樹脂製の継ぎ手に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin joint used for a piping system for transferring a high-temperature and high-pressure deleterious fluid mainly in the so-called high-tech field such as semiconductor production.
【０００２】[0002]
【従来技術とその課題】プラスチックパイプ（チュ−ブ
を含む）の継ぎ手機構には、耐密テ−パネジ、フェル−
ルの使用、その他各種の耐密構造が知られている。しか
しながら、たとえばＴＦＥ（ポリテトラフルオロエチレ
ン）、ＰＦＡ（ポリテトラフルオロエチレンとパ−フル
オロアルキルビニ−ルエ−テルの共重合体）、ＦＥＰ
（ポリテトラフルオロプロピレンの共重合体）等のフッ
素樹脂では、その特性により、使用される液体が高温、
高圧の劇物等が多く、熱サイクルによる膨張収縮の繰り
返し、クリ−プ発生等の要因により流体のリ−クが発生
する。これは、主として接合部に上記要因による微小な
隙間が発生するためで、この防止は極めて困難である。
それ故、従来の継ぎ手類では流体の温度１２０℃、圧力
２Ｋｇ／c 程度以下の条件での使用を余儀なくされ
る。2. Description of the Related Art A joint mechanism for a plastic pipe (including a tube) includes a tight taper screw and a screw.
It is known that various types of tight-fitting structures are used. However, for example, TFE (polytetrafluoroethylene), PFA (copolymer of polytetrafluoroethylene and perfluoroalkyl vinyl ether), FEP
In a fluororesin such as (copolymer of polytetrafluoropropylene), due to its characteristics, the liquid used has a high temperature,
There are many high-pressure deleterious substances, and fluid leakage occurs due to factors such as repeated expansion and contraction due to thermal cycles and generation of creep. This is because a minute gap is generated mainly in the joint portion due to the above factors, and it is extremely difficult to prevent this.
Therefore, the conventional joints are forced to be used under the condition that the fluid temperature is 120 ° C. and the pressure is about 2 Kg / c or less.
【０００３】[0003]
【課題を解決するための手段】この発明に係る継ぎ手
は、外側環状部および内側環状部を有する締具と、内側
周面にストッパ部を有するとともに締具の前記外側環状
部と内側環状部との間に螺合され、ストッパ部と前記内
側環状部の端縁との間で樹脂パイプの折り返し部分を圧
着挟持する継ぎ手本体とで構成し、前記締具は、外側環
状部の内周面にネジ部を形成する一方、内側環状部には
樹脂パイプの折り返し部分がはまり合う凹部を周設する
とともにこの凹部端には継ぎ手本体の内側面に密着する
リップシールを周設し、前記継ぎ手本体は、外周面に前
記外側環状部のネジ部に螺合するネジ部を形成する一
方、内周面には開口部から順次縮径するテーパー部とこ
れに連続するストレート部を形成するとともに前記スト
ッパ部において樹脂パイプの折り返し頂部が当接する部
分には曲面溝部を形成し、さらに、締具の内側環状部に
おける前記凹部の周面には樹脂パイプの折り返し部分に
当接してこれをより堅固に係止するための突条帯を周設
して、上記従来の課題を解決しようとするものである。A joint according to the present invention includes a fastener having an outer annular portion and an inner annular portion, a stopper portion on an inner peripheral surface, and the outer annular portion and the inner annular portion of the fastener. And a joint body that is crimped and sandwiched between the stopper portion and the end edge of the inner annular portion by crimping and sandwiching the folded portion of the resin pipe, and the fastener is provided on the inner peripheral surface of the outer annular portion. While forming the threaded portion, the inner annular portion is provided with a concave portion around which the folded-back portion of the resin pipe fits, and at the end of the concave portion, a lip seal that closely adheres to the inner surface of the joint main body is provided. The outer peripheral surface is formed with a threaded portion that is screwed into the outer annular threaded portion, while the inner peripheral surface is formed with a tapered portion that is gradually reduced in diameter from the opening and a straight portion that is continuous with the tapered portion. At the resin A curved groove portion is formed at a portion where the folded back top of the fastener abuts, and further, a folded portion of the resin pipe is abutted on the peripheral surface of the recessed portion of the inner annular portion of the fastener so that the resin pipe is locked more firmly. In order to solve the above-mentioned conventional problems, the ridge strips of (1) are provided around.
【０００４】[0004]
【作用】この発明に係る継ぎ手において、折り返されて
Ｕ字状に形成された樹脂パイプの先端部分は締具の内側
環状部に係合され、締具と継ぎ手本体との螺合により、
内側環状部の凹部に位置する樹脂パイプの折り返し部分
はそのＵ字状の底部が内側環状部の端縁とストッパ部の
曲面溝とにより密着固定され、さらに突条帯は樹脂パイ
プ折り返し部分の継ぎ手本体内側面と凹部外周面との密
着を強化するとともに、リップシールは継ぎ手本体の内
側面と締具の内側環状部の内周面との密着度をより強固
名ものとし、従来の継ぎ手における流体の温度条件、圧
力条件を大幅に上回る許容範囲にあっても漏洩等の問題
はなんら発生することがなく極めて信頼性の高い樹脂特
にフッ素樹脂パイプ用の継ぎ手を実現することができ
る。In the joint according to the present invention, the tip portion of the resin pipe which is folded back and formed in a U shape is engaged with the inner annular portion of the fastener, and by screwing the fastener and the joint body,
The U-shaped bottom portion of the folded portion of the resin pipe located in the concave portion of the inner annular portion is closely fixed by the edge of the inner annular portion and the curved groove of the stopper portion, and the ridge strip is a joint of the folded portion of the resin pipe. In addition to strengthening the close contact between the inner surface of the body and the outer peripheral surface of the recess, the lip seal further strengthens the degree of close contact between the inner surface of the joint body and the inner peripheral surface of the inner annular portion of the fastener, and Even if the temperature and pressure conditions are within the permissible range, the problems such as leakage do not occur at all, and it is possible to realize a highly reliable joint for a resin, particularly a fluororesin pipe.
【０００５】[0005]
【実施例】図面に基ずいてこの発明の実施例を説明す
る。図１ないし図３は、請求項１ないし２に係る発明の
第１実施例を示す図である。図１において、１は、外側
環状部１ａ、内側環状部１ｂを有する筒状をなすフッ素
樹脂製の締具で、外側環状部１ａの内周面にはネジ部１
ｃが形成されている。 ２は、前記締具に螺合する筒状
をなすフッ素樹脂製の継ぎ手本体で、内側面に開口部か
ら順次縮径するテーパー部２ａとこれに連続するストレ
ート部２ｂを有し、このストレート部２ｂの終端近傍に
はストッパ部７が形成されている一方、外側面には前記
ネジ部１ｃに螺合するネジ部２ｃが形成されている。４
は、フッ素樹脂パイプで、その先端にはＵ字状の折り返
し部分４ａが形成され、折り返し部分４ａの頂部４ｂは
継ぎ手本体２における後述の曲面溝７ａにはまり合って
いる。なお、３は継ぎ手本体２を螺合装着したポンプで
ある。Embodiments of the present invention will be described with reference to the drawings. 1 to 3 are views showing a first embodiment of the invention according to claims 1 and 2. In FIG. 1, reference numeral 1 denotes a tubular fluororesin fastener having an outer annular portion 1a and an inner annular portion 1b. The inner peripheral surface of the outer annular portion 1a includes a screw portion 1
c is formed. Reference numeral 2 denotes a tubular fluororesin joint body that is screwed into the fastener, and has a taper portion 2a on the inner side surface of which the diameter is gradually reduced from the opening and a straight portion 2b continuous with the tapered portion 2a. A stopper portion 7 is formed near the end of 2b, while a screw portion 2c that is screwed into the screw portion 1c is formed on the outer side surface. Four
Is a fluororesin pipe, and a U-shaped folded-back portion 4a is formed at its tip, and a top portion 4b of the folded-back portion 4a is fitted in a curved groove 7a of the joint body 2 described later. Reference numeral 3 is a pump in which the joint body 2 is screwed.
【０００６】図２は、締具１の切断端面拡大図であり、
図に示すように、内側環状部１ｂの外周面には、樹脂パ
イプ４の折り返し部分４ａの収納部としての凹部８が形
成され、この凹部８端部には舌状のリップシール５が周
設されている。図３は、継ぎ手本体２の切断部端面拡大
図であり、図に示すようにストッパ部７の底部には断面
Ｕ字状の曲面溝７ａが形成され前記の頂部４ｂがはまり
合うようになっている。FIG. 2 is an enlarged view of a cut end surface of the fastener 1.
As shown in the figure, a concave portion 8 is formed on the outer peripheral surface of the inner annular portion 1b as a storage portion for the folded portion 4a of the resin pipe 4, and a tongue-shaped lip seal 5 is provided around the end portion of the concave portion 8. Has been done. FIG. 3 is an enlarged view of an end surface of a cut portion of the joint body 2. As shown in the drawing, a curved groove 7a having a U-shaped cross section is formed at the bottom of the stopper portion 7 so that the top portion 4b is fitted. There is.
【０００７】次に、この実施例に係る継ぎ手を組み立て
手順を説明する。まず、締具１に先端をＵ字形状に折り
返したフッ素樹脂パイプ４を通し、パイプ４の折り返し
部分４ａの頂部４ｂを継ぎ手本体２における曲面溝７ａ
にはめ込む。次いで、締具１を継ぎ手本体２に螺合す
る。締具１は、螺合の進行につれて下降してゆくが、側
方にやや突出しているリップシール５はテーパー部２ａ
が形成されているため継ぎ手本体２の内面に引掛かるこ
となく順次下降する。一方、締具１の下降につれて、内
側環状部１ｂはパイプ４のＵ字状折り返し部分の間隙に
進入し、締具１の締結完了に伴い先端部が曲面溝７ａと
の間で頂部４ｂを圧着挟持し、パイプ４内部からの流体
の漏洩を完全に遮断する。。この状態でパイプ４の折り
返し部分４ａは内側環状部１ｂの凹部８に位置するが、
突帯部６により折り返し部分４ａは、継ぎ手本体２の内
側面と凹部８の壁面に強固に当接する。また、前記リッ
プシール５も継ぎ手本体２の内周面に強固に密着し、仮
に頂部４ｂと曲面溝７ａとの間に流体の漏洩があっても
これの継ぎ手外部への漏洩は完全に防止されることにな
る。Next, the procedure for assembling the joint according to this embodiment will be described. First, the fastener 1 is passed through a fluororesin pipe 4 whose tip is folded back into a U shape, and the top portion 4b of the folded portion 4a of the pipe 4 is curved into the curved groove 7a in the joint body 2.
Inset. Next, the fastener 1 is screwed onto the joint body 2. The fastener 1 descends as the screwing progresses, but the lip seal 5 slightly protruding laterally has a taper portion 2a.
Since it is formed, the joint body 2 descends sequentially without being caught on the inner surface of the joint body 2. On the other hand, as the fastener 1 descends, the inner annular portion 1b enters the gap between the U-shaped folded portions of the pipe 4, and when the fastening of the fastener 1 is completed, the tip portion crimps the top portion 4b with the curved groove 7a. It clamps and completely blocks the leakage of fluid from the inside of the pipe 4. .. In this state, the folded-back portion 4a of the pipe 4 is located in the recess 8 of the inner annular portion 1b.
The folded-back portion 4a is firmly brought into contact with the inner side surface of the joint main body 2 and the wall surface of the concave portion 8 by the protruding portion 6. Further, the lip seal 5 also firmly adheres to the inner peripheral surface of the joint body 2, and even if fluid leaks between the top 4b and the curved groove 7a, the leakage of this fluid to the outside of the joint is completely prevented. Will be.
【０００８】なお、フッ素樹脂パイプ４先端の折り返し
は、専用の治具をもちいてなすが、パイプの肉厚の大き
く折り返しが困難な場合には先端の端面に周状の深い切
れ目を入れ、２層または複数層を形成してなすと容易に
折り返しが可能である。 図４は、請求項１ないし２に
係る発明の第２実施例を示す図である。この実施例はパ
イプ相互を接続する場合を示している。この実施例にお
いて、継ぎ手本体２がストッパ部７を中心に上下対称の
構造になっている他は前述の実施例と全く同様である。The tip of the fluororesin pipe 4 is folded back by using a dedicated jig. However, when the pipe has a large wall thickness and is difficult to fold back, a deep circumferential cut is made on the end face of the pipe. It can be easily folded back by forming a layer or a plurality of layers. FIG. 4 is a diagram showing a second embodiment of the invention according to claims 1 and 2. In this embodiment, pipes are connected to each other. This embodiment is exactly the same as the above-mentioned embodiment except that the joint body 2 is vertically symmetrical with respect to the stopper portion 7.
【０００９】図５は、請求項１ないし２に係る発明の第
３実施例を示す図である。この実施例にあっては、パイ
プ４の先端部分は、図示のように外側に丸め込むような
状態で折り返されている。そして、この○状の折り返し
部分は内側環状部１ｂの端部と頂部４ｂとにより圧着挟
持されるようになっている。その他の構成は上述の実施
例と同様である。FIG. 5 is a diagram showing a third embodiment of the invention according to claims 1 and 2. In this embodiment, the tip portion of the pipe 4 is folded back so as to be rolled outward as shown in the drawing. The circled folded portion is crimped and clamped by the end of the inner annular portion 1b and the top portion 4b. Other configurations are the same as those in the above-mentioned embodiment.
【００１０】図６は、請求項３ないし４に係る発明の第
１実施例を示す図である。図において、９は環状のスリ
−ブで締具１の内側環状部１ｂの端部とパイプ４の折り
返し部分４ａの頂部４ｂとの間に介装されている。この
スリ−ブ９の外周面には突起部９ａが周設されてテ−パ
−部２ａに密着するようになっており、前記の実施例に
おけるリップシ−ル５と同様の作用をなしている。スリ
−ブ９の設置により、締具１の内側環状部１ｂは外側環
状部１ａに比較して短くなり、また凹部８も形成されて
いない点を除きその他の構成は図１に示す実施例と同様
である。FIG. 6 is a diagram showing a first embodiment of the invention according to claims 3 to 4. In the figure, 9 is an annular sleeve which is interposed between the end of the inner annular portion 1b of the fastener 1 and the top 4b of the folded portion 4a of the pipe 4. A projecting portion 9a is provided on the outer peripheral surface of the sleeve 9 so as to be in close contact with the taper portion 2a, and has the same operation as the lip seal 5 in the above-described embodiment. .. With the installation of the sleeve 9, the inner annular portion 1b of the fastener 1 is shorter than the outer annular portion 1a, and the other configuration is the same as the embodiment shown in FIG. 1 except that the recess 8 is not formed. It is the same.
【００１１】図７は、請求項３ないし４に係る発明の第
２実施例を示す図である。この実施例はパイプ相互を接
続する場合を示している。この実施例において、継ぎ手
本体２がストッパ部７を中心に上下対称の構造になって
いる他は前述の実施例と全く同様である。FIG. 7 is a diagram showing a second embodiment of the invention according to claims 3-4. In this embodiment, pipes are connected to each other. This embodiment is exactly the same as the above-mentioned embodiment except that the joint body 2 is vertically symmetrical with respect to the stopper portion 7.
【００１２】[0012]
【発明の効果】この発明は、以上説明した構成作用によ
り、従来の樹脂継ぎ手の有する大きな欠点であるクリー
プ現象による漏洩を完全に防止し、さらに従来簡便かつ
有効な接続手段の見当たらなかったフッ素樹脂パイプの
接続を極めて簡単に行なうことができる。The present invention, by virtue of the above-described constitutional effects, completely prevents leakage due to the creep phenomenon, which is a major drawback of conventional resin joints, and has not yet found a simple and effective connecting means. The pipe connection can be made very easily.
【図面の簡単な説明】[Brief description of drawings]
【図１】 請求項１ないし２に係る発明の第１実施例を
示す断面図である。FIG. 1 is a sectional view showing a first embodiment of the invention according to claims 1 and 2.
【図２】 同上実施例に係る締具の切断部端面拡
大図である。FIG. 2 is an enlarged view of an end face of a cutting portion of the fastener according to the above embodiment.
【図３】 図１における継ぎ手本体の切断部端面拡
大図である。FIG. 3 is an enlarged view of an end face of a cut portion of the joint body in FIG.
【図４】 請求項１ないし２に係る発明の第２実施例を
示す断面図である。FIG. 4 is a sectional view showing a second embodiment of the invention according to claims 1 and 2.
【図５】 請求項１ないし２に係る発明の第３実施例を
示す断面図である。FIG. 5 is a sectional view showing a third embodiment of the invention according to claims 1 and 2.
【図６】 請求項３ないし４に係る発明の第１実施例を
示す断面図である。FIG. 6 is a sectional view showing a first embodiment of the invention according to claims 3 to 4.
【図７】 請求項３ないし４に係る発明の第２実施例を
示す断面図である。FIG. 7 is a sectional view showing a second embodiment of the invention according to claims 3 to 4.
【符号の説明】 １ 締具 １ａ 外側環状部 １ｂ 内側環状部 １ｃ ネジ部 ２ 継ぎ手本体 ２ａ テーパー部 ２ｂ ストレート部 ２ｃ ネジ部 ３ ポンプ ４ パイプ ４ａ 折り返し部分 ４ｂ 頂部 ５ リップシール ６ 突条帯 ７ ストッパ部 ７ａ 曲面溝 ８ 凹部 ９ スリ−ブ ９ａ 環状突起部[Explanation of reference numerals] 1 fastener 1a outer annular portion 1b inner annular portion 1c screw portion 2 joint body 2a taper portion 2b straight portion 2c screw portion 3 pump 4 pipe 4a folded portion 4b top portion 5 lip seal 6 protruding strip 7 stopper portion 7a curved groove 8 concave 9 sleeve 9a annular projection
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】全図[Correction target item name] All drawings
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 [Figure 1]
【図２】 [Fig. 2]
【図３】 [Figure 3]
【図４】 [Figure 4]
【図５】 [Figure 5]
【図６】 [Figure 6]
【図７】 [Figure 7]
Claims (2)
ット状の締具と、内側周面にストッパ部を有するととも
に締具の前記外側環状部と内側環状部との間に螺合さ
れ、ストッパ部と前記内側環状部の端縁との間で樹脂パ
イプの折り返し部分を圧着挟持する継ぎ手本体とからな
り、 前記締具は、外側環状部の内周面にネジ部を形成する一
方、内側環状部の外周面には樹脂パイプの折り返し部分
がはまり合う凹部を周設するとともにこの凹部端には継
ぎ手本体の内側面に密着するリップシールを周設し、 前記継ぎ手本体は、外周面に前記外側環状部のネジ部に
螺合するネジ部を形成する一方、内周面には開口部から
順次縮径するテーパー部とこれに連続するストレート部
を形成するとともに前記ストッパ部において樹脂パイプ
の折り返し頂部が当接する部分には曲面溝部を形成した
ことを特徴とする継ぎ手。1. A nut-shaped fastener having an outer annular portion and an inner annular portion, a stopper portion on an inner peripheral surface, and a screwed portion between the outer annular portion and the inner annular portion of the fastener, and the stopper. And a joint body for crimping and sandwiching the folded portion of the resin pipe between the inner annular portion and the end portion of the inner annular portion, the fastener forms a screw portion on the inner peripheral surface of the outer annular portion, while the inner annular portion The outer peripheral surface of the portion is provided with a concave portion in which the folded-back portion of the resin pipe fits, and at the end of the concave portion, a lip seal that is in close contact with the inner surface of the joint body is provided. While forming a threaded portion that is screwed into the threaded portion of the annular portion, a taper portion that gradually decreases in diameter from the opening and a straight portion that is continuous with the tapered portion are formed on the inner peripheral surface, and the folded top portion of the resin pipe at the stopper portion is formed. But Joint, characterized in that the formation of the curved grooves in the portion in contact.
おける前記凹部の周面には樹脂パイプの折り返し部分に
当接してこれをより堅固に係止するための突条帯を周設
したことを特徴とする継ぎ手。2. A ridge band for contacting a folded-back portion of a resin pipe and for securely locking the folded-back portion, is provided around a peripheral surface of the recess in the inner annular portion of the fastener. A fitting characterized by that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14896792A JPH05322083A (en) | 1992-05-18 | 1992-05-18 | Coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14896792A JPH05322083A (en) | 1992-05-18 | 1992-05-18 | Coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05322083A true JPH05322083A (en) | 1993-12-07 |
Family
ID=15464675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14896792A Pending JPH05322083A (en) | 1992-05-18 | 1992-05-18 | Coupling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05322083A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6179348B1 (en) | 1998-12-15 | 2001-01-30 | Kimio Okamoto | Tube-connecting fitting and fitting structure |
| US6354636B2 (en) * | 2000-03-02 | 2002-03-12 | Advance Denki Kougyou Kabushiki Kaisha | Tube connecting structure |
| JP2005523780A (en) * | 2002-05-01 | 2005-08-11 | ボストン サイエンティフィック リミテッド | Medical catheter assembly and method of using the assembly |
| JP2010038257A (en) * | 2008-08-05 | 2010-02-18 | Nippon Pillar Packing Co Ltd | Pipe joint |
| JP2010038258A (en) * | 2008-08-05 | 2010-02-18 | Nippon Pillar Packing Co Ltd | Pipe fitting |
| JP2019504973A (en) * | 2016-01-26 | 2019-02-21 | サン−ゴバン パフォーマンス プラスティクス フランス | Tube connector assembly |
-
1992
- 1992-05-18 JP JP14896792A patent/JPH05322083A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6179348B1 (en) | 1998-12-15 | 2001-01-30 | Kimio Okamoto | Tube-connecting fitting and fitting structure |
| US6354636B2 (en) * | 2000-03-02 | 2002-03-12 | Advance Denki Kougyou Kabushiki Kaisha | Tube connecting structure |
| JP2005523780A (en) * | 2002-05-01 | 2005-08-11 | ボストン サイエンティフィック リミテッド | Medical catheter assembly and method of using the assembly |
| US8029462B2 (en) | 2002-05-01 | 2011-10-04 | Boston Scientific Scimed, Inc. | Medical catheter assembly and method of using the same |
| JP2010038257A (en) * | 2008-08-05 | 2010-02-18 | Nippon Pillar Packing Co Ltd | Pipe joint |
| JP2010038258A (en) * | 2008-08-05 | 2010-02-18 | Nippon Pillar Packing Co Ltd | Pipe fitting |
| JP2019504973A (en) * | 2016-01-26 | 2019-02-21 | サン−ゴバン パフォーマンス プラスティクス フランス | Tube connector assembly |
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| JPS626376Y2 (en) |
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| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20030114 |