JPH08247353A - Tube joint - Google Patents

Tube joint

Info

Publication number
JPH08247353A
JPH08247353A JP7074722A JP7472295A JPH08247353A JP H08247353 A JPH08247353 A JP H08247353A JP 7074722 A JP7074722 A JP 7074722A JP 7472295 A JP7472295 A JP 7472295A JP H08247353 A JPH08247353 A JP H08247353A
Authority
JP
Japan
Prior art keywords
tube
ring
joint
diameter
cap nut
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
Application number
JP7074722A
Other languages
Japanese (ja)
Other versions
JP2756929B2 (en
Inventor
Naoharu Nakagawa
尚治 中川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furoueru Kk
Original Assignee
Furoueru Kk
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Furoueru Kk filed Critical Furoueru Kk
Priority to JP7074722A priority Critical patent/JP2756929B2/en
Publication of JPH08247353A publication Critical patent/JPH08247353A/en
Application granted granted Critical
Publication of JP2756929B2 publication Critical patent/JP2756929B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
    • F16L19/028—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall
    • F16L19/0283—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall and having a bell-mouthed shape
    • 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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/04—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts using additional rigid rings, sealing directly on at least one pipe end, which is flared either before or during the making of the connection

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Pressure Members (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)

Abstract

PURPOSE: To prevent coming out of a tube by forming an enlarged diameter part at the end part of the tube to weld a ring on its outside, and firmly pressing down the projected end of the ring by screwing force of a cap nut screwed onto a joint body. CONSTITUTION: A ring 2 made of a heat resistant affinitive fluororesin having higher melting point than that of a tube 1 is covered and locked on the outside peripheral surface of a large diameter deformed part 1a formed at the end part of the fluororesin tube 1 by a weld part (a), and an insertion cylinder 5 of a joint main body 4 having a groove ring 3 is inserted into the large diameter deformed part 1a through the groove ring 3. Further, the most part of the ring 2 is inserted into the groove ring 3 in order for the projected part 2a of the ring 2 to be clamped by a cap nut 6 screwed onto the male screw part 4a of the joint body 4. Thus, the respective tips of the ring 2 and the large diameter deformed part 1a are firmly pressure contacted to the bottom part 3a of the groove ring 3 to prevent coming out of the tube 1.

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、合成樹脂製特にフッ
素樹脂製チューブの継手として好適なチューブ継手に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube joint suitable as a joint for synthetic resin tubes, particularly fluororesin tubes.

【０００２】[0002]

【従来の技術】この種のチューブ継手としては、従来、
例えば実開平４−１２２８８２号公報記載のものが有
る。2. Description of the Related Art As a tube joint of this type,
For example, there is one disclosed in Japanese Utility Model Laid-Open No. 4-122882.

【０００３】この従来の技術は、チューブに変形部分を
形成することで抜け止めを施したチューブ継手におい
て、フッ素樹脂製のチューブの端部に外鍔と大径部とを
形成するとともに、前記大径部内に溝環を有する継手本
体の挿着筒を挿入し、また前記大径部に遊挿したリング
の大部分を前記溝環内に挿入して前記継手本体の雄ネジ
部に螺入した袋ナットで前記リングを外鍔にきつく圧接
することでチューブの抜け止めを施すとともに、袋ナッ
トの肩部の内面で前記チューブの中間部分を前記挿着筒
の端面にきつく圧接してチューブ屈折部を形成してなる
チューブ継手である。According to this conventional technique, in a tube joint in which a deformed portion is formed in the tube to prevent the tube from coming off, an outer collar and a large diameter portion are formed at the end of the fluororesin tube, and The insertion tube of the joint body having the groove ring in the diameter portion was inserted, and most of the ring loosely inserted in the large diameter portion was inserted into the groove ring and screwed into the male screw portion of the joint body. The tube is prevented from coming off by pressing the ring tightly against the outer collar with a cap nut, and the middle portion of the tube is pressed tightly against the end surface of the insertion tube on the inner surface of the shoulder portion of the cap nut to bend the tube bending portion. It is a tube joint formed by forming.

【０００４】[0004]

【発明が解決しようとする課題】この従来の技術におけ
る変形部分を形成するための熱作業の工程は２回必要で
あり、時間がかかっていたし、加熱対流で加熱むらが起
こると、外鍔の形状が均等にならなくなり、締め付け時
にアンバランスが起きて、安定な締め付けができない場
合があり、加熱に対する熟練が必要であった。The process of the thermal work for forming the deformed portion in this conventional technique requires two times, and it takes time, and when uneven heating occurs due to heating convection, the outer collar of the outer collar is damaged. There was a case where the shapes became uneven and imbalance occurred at the time of tightening, so that stable tightening could not be achieved, and skill for heating was required.

【０００５】また、大径部を形成した後、金型を外して
時間が経つとチューブ屈折部が徐々に縮んできてしま
い、挿着筒に充分入り込まなくなるので、大径部に熱が
残っているうちにすばやく継手の挿着筒に押し込まなけ
ればならないので、機敏な作業が必要であるという多く
の問題点が有った。Further, after the large diameter portion is formed, when the mold is removed and time passes, the tube bending portion gradually shrinks and does not sufficiently enter the insertion tube, so that heat remains in the large diameter portion. Since it had to be quickly pushed into the insertion tube of the joint while it was there, there were many problems that agile work was required.

【０００６】この発明は、前記した各問題点を除去する
ために、チューブの端部に拡径部を形成してその外側に
リングを溶着し、このリングの突出端を継手本体に螺入
した袋ナットの螺入力できつく押さえ込んでチューブの
抜け止めを実行することを目的とする。According to the present invention, in order to eliminate the above-mentioned problems, an enlarged diameter portion is formed at the end of the tube, a ring is welded to the outside thereof, and the protruding end of this ring is screwed into the joint body. The purpose is to prevent the tube from coming off by pressing it tightly with the cap nut.

【０００７】[0007]

【課題を解決するための手段】上記したこの発明の目的
は、チューブに拡径部分を形成してその外側にリングを
被着することで抜け止めを施したチューブ継手を構成す
るに当り、フッ素樹脂製のチューブの端部に形成した大
径変形部の外周面に耐熱親和性フッ素樹脂製リングを被
せて溶着部で固着するとともに、前記大径変形部内に溝
環を有する継手本体の挿着筒を挿入し、また前記リング
の大部分を前記溝環内に挿入して前記継手本体の雄ネジ
部に螺入した袋ナットで前記リングの突出部を締め付け
ることにより、このリングと前記大径変形部との各先端
を前記溝環の底部にきつく圧接することでチューブの抜
け止めを施すとともに、袋ナットの肩部の内面で前記チ
ューブの中間部分を前記挿着筒の端面にきつく圧接して
チューブ屈折部を形成したことで達成できた。DISCLOSURE OF THE INVENTION It is an object of the present invention to construct a tube joint in which an expanded diameter portion is formed in a tube and a ring is attached to the outside thereof to prevent the tube joint from coming off. The outer diameter of the large-diameter deformed part formed at the end of the resin tube is covered with a heat-resistant affinity fluororesin ring and fixed at the welded part, and the joint body with a groove ring is inserted in the large-diameter deformed part. By inserting a cylinder, and by inserting most of the ring into the groove ring and tightening the protruding part of the ring with a cap nut screwed into the male screw part of the joint body, this ring and the large diameter The tip of the deformed portion is tightly pressed against the bottom of the groove ring to prevent the tube from coming off, and the inner surface of the shoulder portion of the cap nut is tightly pressed against the end surface of the insertion tube. Tube bend Could be achieved by form it was.

【０００８】[0008]

【作用】予じめリングと袋ナットとを挿通してあるチュ
ーブを外側から加熱して拡径治具で大径変形部を作った
直後にリングを、その外側から肉厚方向に伝わる伝導熱
で内側に有るチューブの大径変形部に強固に溶着でき、
チューブの大径部を継手本体の溝環を経て挿着筒の外周
面に挿入した後、チューブ大径部に溶着済のリングの突
出部を目掛けて、袋ナットを継手本体の雄ネジ部に螺入
する。[Function] Immediately after the tube through which the pre-ring and the cap nut are inserted is heated from the outside and a large-diameter deformed portion is created by the diameter-expanding jig, the ring is transferred with conduction heat from the outside in the thickness direction. Can be firmly welded to the large diameter deformed part of the tube inside.
After inserting the large diameter part of the tube into the outer peripheral surface of the insertion tube through the groove ring of the fitting body, aim the protruding part of the welded ring on the large diameter part of the tube and attach the cap nut to the male thread part of the fitting body. Screw into.

【０００９】この螺入力で前記リングとこれを溶着した
チューブ大径部との各先端を前記溝環底部にきつく押し
付けることができ、チューブは不動になると共に、袋ナ
ットの肩部の周縁部でチューブの中間部外周面を挿着筒
の先端にきつく押し付ける結果となり、チューブ屈折部
を形成できる。By this screw input, the respective tips of the ring and the large diameter portion of the tube to which the ring is welded can be pressed tightly against the bottom of the groove ring, the tube becomes immobile, and at the periphery of the shoulder portion of the cap nut. As a result of pressing the outer peripheral surface of the intermediate portion of the tube tightly against the tip of the insertion tube, the tube bending portion can be formed.

【００１０】したがって、このチューブ屈折部と袋ナッ
トの肩部の周縁部およびチューブに溶着済のリングで不
動となっているチューブの大径変形部とでチューブは継
手本体に対して気密・液密を保ち継手本体から引き抜け
ることがない。Therefore, the tube bending portion, the peripheral portion of the shoulder portion of the cap nut and the large-diameter deformed portion of the tube which is immovable by the ring already welded to the tube make the tube airtight or liquid-tight with respect to the joint body. Holds and does not pull out from the joint body.

【００１１】[0011]

【実施例】実施例について図面を参照して説明する。先
ず、この発明の基本構成は、図１に示すように、チュー
ブに拡径変形部分を形成してその外側にリングを被着す
ることで抜け止めを施したチューブ継手を構成するに当
り、通常ＰＦＡと称するフッ素樹脂製のチューブ１の端
部を図２，図３のような加熱源ｈ内で加熱しながら拡径
治具Ａを用いて拡径して大径変形部１ａを形成し、その
外周面にチューブ１よりも融点が高いポリ・テトラ・フ
ルオロ・エチレンのような耐熱親和性フッ素樹脂製のリ
ング２を被せて加熱し、これら両者を図５のように溶着
して大径合着部を作る。EXAMPLES Examples will be described with reference to the drawings. First, as shown in FIG. 1, the basic structure of the present invention is generally used in forming a tube joint in which a diameter-expanding deformation portion is formed on a tube and a ring is attached to the outside of the tube to prevent the tube from coming off. While heating the end portion of the fluororesin tube 1 called PFA in the heating source h as shown in FIGS. 2 and 3, the diameter is enlarged using the diameter expanding jig A to form the large diameter deformed portion 1a, The outer peripheral surface is covered with a ring 2 made of a heat-resistant affinity fluororesin such as poly-tetra-fluoro-ethylene having a melting point higher than that of the tube 1 and heated, and both are welded as shown in FIG. Make a dress.

【００１２】そして、この大径合着部を内装できる大き
さの図６のような溝環３を有する継手本体４の挿着筒５
を前記チューブ１の大径変形部１ａ内に挿入するととも
に、前記大径変形部１ａとリング２との合着部の大部分
を図７のように前記溝環３内に挿入する。Then, the insertion tube 5 of the joint body 4 having the groove ring 3 as shown in FIG. 6 which is large enough to accommodate the large-diameter joint.
Is inserted into the large-diameter deformed portion 1a of the tube 1, and most of the joint between the large-diameter deformed portion 1a and the ring 2 is inserted into the groove ring 3 as shown in FIG.

【００１３】そして、前記継手本体４の雄ネジ部４ａに
螺入した袋ナット６で前記リング２の突出部２ａを図８
のように締め付けることにより、このリング２と前記大
径変形部１ａとの各先端を前記溝環３の底部３ａにきつ
く圧接することでチューブ１の抜け止めを施すととも
に、袋ナット６の肩部７の内面で前記チューブ１の中間
部分を前記挿着筒５の端面にきつく圧接してチューブ屈
折部１ｂを形成してこの発明のチューブ継手を構成でき
る。Then, the protruding portion 2a of the ring 2 is fixed to the male screw portion 4a of the joint body 4 with the cap nut 6 shown in FIG.
By tightening the ends of the ring 2 and the large-diameter deformed portion 1a tightly against the bottom portion 3a of the groove ring 3, the tube 1 is prevented from coming off and the shoulder portion of the cap nut 6 is tightened. The tube joint of the present invention can be constructed by tightly pressing the intermediate portion of the tube 1 on the inner surface of the tube 7 to the end surface of the insertion tube 5 to form the tube bending portion 1b.

【００１４】したがって、このチューブ屈折部１ｂに対
する袋ナット６の肩部７の周縁部の押し付け力と溶着済
リング２に加わった押し付け力で不動となっているチュ
ーブ１の大径変形部１ａとでチューブ１は図１に示すよ
うに継手本体４に対して気密・液密を厳重に保ち継手本
体４から引き抜けることがない。Therefore, the large-diameter deformed portion 1a of the tube 1 which is immovable by the pressing force of the peripheral portion of the shoulder portion 7 of the cap nut 6 against the tube bending portion 1b and the pressing force applied to the welded ring 2 is fixed. As shown in FIG. 1, the tube 1 is kept airtight and liquid-tight with respect to the joint body 4 and is not pulled out from the joint body 4.

【００１５】なお、リング２の突出部２ａを薄肉化する
ことで、チューブ屈折部１ｂの経年変化による袋ナット
６の「増し締め」に際し、上記薄肉化突出部２ａが適度
に弛んでチューブ大径変形部１ａに無用な外力が加わる
ことなく「増し締め」が可能となる。By thinning the protruding portion 2a of the ring 2, the thinned protruding portion 2a is appropriately loosened when the cap nut 6 is "retightened" due to the aging of the tube bending portion 1b, and the tube large diameter is increased. "Re-tightening" is possible without applying unnecessary external force to the deformable portion 1a.

【００１６】また、リング２の先端にチューブ大径変形
部１ａを受ける内鍔２ｂを図９のように形成すれば、チ
ューブ１に対するリング２の溶着位置合せが容易にでき
るとともに、チューブ１の大径変形部１ａの先端を保護
でき、また、大径変形部１ａの溶融時における拡径金型
Ａへの付着を防げる。If the inner collar 2b for receiving the large-diameter tube deformation portion 1a is formed at the tip of the ring 2 as shown in FIG. 9, the welding position of the ring 2 with respect to the tube 1 can be easily adjusted and the large size of the tube 1 can be achieved. It is possible to protect the tip of the diametrically deforming portion 1a and prevent the large diameter diametrically deforming portion 1a from adhering to the diameter-expanding die A during melting.

【００１７】[0017]

【発明の効果】この発明は、以上のように構成したの
で、以下に記載の効果を奏する。袋ナット６の螺入力で
前記リング２を介してチューブ１の大径変形部１ａの先
端を継手本体４の溝環３内にきつく押し付けることで、
チューブ１は、不動になると共に、袋ナット６の肩部７
の周縁部でチューブ１の中間部外周面を挿着筒５の先端
にきつく押し付けてチューブ屈折部１ｂを形成でき、袋
ナット６の肩部７の周縁部およびリング２で不動となっ
ているチューブ１は、継手本体４に対して気密・液密を
保ち継手本体４から引き抜けることがなく、長期に亘り
安定に使用できるといった第１の効果が有る。Since the present invention is configured as described above, it has the following effects. By tightly pressing the tip of the large-diameter deformed portion 1a of the tube 1 into the groove ring 3 of the joint body 4 via the ring 2 by the screw input of the cap nut 6,
The tube 1 becomes stationary and the shoulder portion 7 of the cap nut 6
The tube bending portion 1b can be formed by tightly pressing the outer peripheral surface of the intermediate portion of the tube 1 to the tip of the insertion tube 5 at the peripheral edge of the tube, and the tube is immovable at the peripheral edge of the shoulder 7 of the cap nut 6 and the ring 2. 1 has the first effect that it is air-tight and liquid-tight with respect to the joint body 4, does not pull out from the joint body 4, and can be used stably for a long period of time.

【００１８】さらに、この発明におけるチューブ１の大
径変形部１ａの加熱成形と、その外周面に対するリング
２の溶着とは１工程で実現でき、作業時間の短縮化が可
能になったという第２の効果も有る。Further, in the present invention, the hot forming of the large-diameter deformed portion 1a of the tube 1 and the welding of the ring 2 to the outer peripheral surface thereof can be realized in one step, and the working time can be shortened. There is also the effect of.

【００１９】また、リング２には、ポリ・テトラ・フル
オロ・エチレンのような耐熱親和性リングを用いている
ため、加熱源をリング近くまで設置することができるの
で熱効率よく実施でき、さらに、リング２が熱を均等化
しながら肉厚方向に伝導してチューブ１の大径変形部１
ａに溶着してゆくので、周辺空気の対流による加熱むら
が軽減できたという第３の効果も有る。Further, since the ring 2 is made of a heat-resistant affinity ring such as poly-tetra-fluoro-ethylene, the heating source can be installed close to the ring, so that the ring can be efficiently heat-treated. 2 conducts heat in the thickness direction while equalizing the heat, and the large-diameter deformed portion 1 of the tube 1
Since it is welded to a, there is a third effect that uneven heating due to convection of ambient air can be reduced.

【００２０】さらにまた、加熱終了、溶着終了後にチュ
ーブ１の大径変形部１ａが元の大きさに戻ろうとする縮
み力を溶着済リング２で強固に受け止めることができ、
継手本体４への挿着を慌てて行なわなくても良くなった
という作業上の便益も有る。Furthermore, the welded ring 2 can firmly receive the shrinking force of the large-diameter deformed portion 1a of the tube 1 returning to the original size after heating and welding.
There is also a work benefit that it is no longer necessary to hurry to insert the joint body 4.

【００２１】請求項２によれば、リング２の突出部２ａ
を薄肉化したので、チューブ屈折部１ｂの経年変化によ
る袋ナット６の「増し締め」に際し、上記薄肉化突出部
２ａが適度に弛んでチューブ１の大径変形部１ａに無用
な外力が加わることなく「増し締め」が可能となるとい
う効果を付加できる。According to claim 2, the protruding portion 2a of the ring 2 is
Since the wall thickness is reduced, the thinned protrusion 2a is appropriately loosened and an unnecessary external force is applied to the large-diameter deformed portion 1a of the tube 1 when the cap nut 6 is "retightened" due to the aging of the tube bending portion 1b. It is possible to add the effect that "re-tightening" is possible without the need.

【００２２】請求項３では、リング２の内鍔２ｂにより
チューブ１に対する挿入深さを自動決定できるし、大径
変形部１ａの融着残渣が拡径金型Ａに付着せず、成形も
し易いという実益を付加できた。In the third aspect, the insertion depth into the tube 1 can be automatically determined by the inner collar 2b of the ring 2, and the fusion residue of the large-diameter deformed portion 1a does not adhere to the diameter-expansion die A and can be easily molded. I was able to add the actual benefit.

【図面の簡単な説明】[Brief description of drawings]

【図１】この発明によるチューブ継手の縦断側面図FIG. 1 is a vertical sectional side view of a tube joint according to the present invention.

【図２】チューブ加熱の準備状態を示す断面図FIG. 2 is a cross-sectional view showing a tube heating preparation state.

【図３】チューブの加熱拡径の途中を示す縦断側面図FIG. 3 is a vertical cross-sectional side view showing a process of heating and expanding the tube.

【図４】チューブと拡径金型との関係を示す縦断側面図FIG. 4 is a vertical sectional side view showing the relationship between the tube and the diameter-expanding die.

【図５】図４と状態を異にした縦断側面図FIG. 5 is a vertical sectional side view showing a state different from that in FIG.

【図６】チューブをチューブ継手に結合する途中の状態
を示す縦断側面図FIG. 6 is a vertical sectional side view showing a state in which the tube is being joined to the tube joint.

【図７】図６と状態を異にした縦断側面図FIG. 7 is a vertical sectional side view showing a state different from that of FIG.

【図８】図７に示すものの袋ナット締め付け途中の縦断
側面図FIG. 8 is a vertical sectional side view of the one shown in FIG. 7 during tightening of the cap nut.

【図９】リングに内鍔を形成した実施例の縦断側面図FIG. 9 is a vertical sectional side view of an embodiment in which an inner collar is formed on a ring.

【符号の説明】[Explanation of symbols]

１ フッ素樹脂製チューブ １ａ 大径変形部 １ｂ チューブ屈折部 ２ 耐熱親和性フッ素樹脂製リング ２ａ 突出部 ２ｂ 内鍔 ３ 溝環 ３ａ 溝環底部 ４ 継手本体 ４ａ 雄ネジ部 ５ 挿着筒 ６ 袋ナット ７ 肩部 Ａ 拡径金型 ｈ 加熱源 1 Fluororesin tube 1a Large diameter deformation part 1b Tube bending part 2 Heat resistance affinity fluororesin ring 2a Projection part 2b Inner collar 3 Groove ring 3a Groove ring bottom part 4 Joint body 4a Male screw part 5 Insertion cylinder 6 Cap nut 7 Shoulder A Expanding die h Heating source

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 チューブに拡径部分を形成してその外側
にリングを被着することで抜け止めを施したチューブ継
手において、フッ素樹脂製のチューブ１の端部に形成し
た大径変形部１ａの外周面にチューブ１よりも高い融点
の耐熱親和性フッ素樹脂製リング２を被せて溶着部ａで
固着するとともに、前記大径変形部１ａ内に溝環３を有
する継手本体４の挿着筒５を挿入し、また前記リング２
の大部分を前記溝環３内に挿入して前記継手本体４の雄
ネジ部４ａに螺入した袋ナット６で前記リング２の突出
部２ａを締め付けることにより、このリング２と前記大
径変形部１ａとの各先端を前記溝環３の底部３ａにきつ
く圧接することでチューブ１の抜け止めを施すととも
に、袋ナット６の肩部７の内面で前記チューブ１の中間
部分を前記挿着筒５の端面にきつく圧接してチューブ屈
折部１ｂを形成してなるチューブ継手。1. A large-diameter deformed portion 1a formed at an end portion of a fluororesin tube 1 in a tube joint in which an expanded diameter portion is formed on a tube and a ring is attached to the outside of the tube to prevent the tube from coming off. The outer peripheral surface of the tube is covered with a heat-resistant and affinity fluororesin ring 2 having a melting point higher than that of the tube 1 to be fixed at the welded portion a, and the insertion tube of the joint body 4 having the groove ring 3 in the large-diameter deformed portion 1a. 5 and also the ring 2
Of the ring 2 and the large-diameter deformation by tightening the protrusion 2a of the ring 2 with the cap nut 6 inserted into the groove ring 3 and screwed into the male screw portion 4a of the joint body 4. The tube 1 is prevented from coming off by tightly pressing the respective ends of the tube 1 and the bottom portion 3a of the groove ring 3, and the intermediate portion of the tube 1 is attached to the inner surface of the shoulder portion 7 of the cap nut 6 by the insertion tube. A tube joint formed by tightly pressing the end face of 5 to form a tube bending portion 1b. 【請求項２】 リング２の突出部２ａの肉厚を薄く形成
してなる請求項１記載のチューブ継手。2. The tube joint according to claim 1, wherein the projection 2a of the ring 2 is formed to be thin. 【請求項３】 リング２にチューブ１の大径変形部１ａ
の先端を受ける内鍔２ｂを形成してなる請求項１または
２記載のチューブ継手。3. The large-diameter deformed portion 1a of the tube 1 on the ring 2.
The tube joint according to claim 1 or 2, wherein an inner collar 2b for receiving the tip of the tube joint is formed.
JP7074722A 1995-03-08 1995-03-08 Tube fitting Expired - Fee Related JP2756929B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7074722A JP2756929B2 (en) 1995-03-08 1995-03-08 Tube fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7074722A JP2756929B2 (en) 1995-03-08 1995-03-08 Tube fitting

Publications (2)

Publication Number Publication Date
JPH08247353A true JPH08247353A (en) 1996-09-27
JP2756929B2 JP2756929B2 (en) 1998-05-25

Family

ID=13555409

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7074722A Expired - Fee Related JP2756929B2 (en) 1995-03-08 1995-03-08 Tube fitting

Country Status (1)

Country Link
JP (1) JP2756929B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6022053A (en) * 1997-03-27 2000-02-08 Flowell Corporation Joint for coupling tubes
KR100557186B1 (en) * 2000-08-31 2006-03-03 가부시키가이샤 후로웨루 Tube joint and tube fitting method therefor
CN105299369A (en) * 2015-08-07 2016-02-03 上海空间推进研究所 Bimetallic transition joint of metal bellows storage tank for propellant and manufacturing method of bimetallic transition joint
KR20160003094U (en) * 2015-03-03 2016-09-19 주식회사유한훌로텍 Coupling structure of tube

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0650714U (en) * 1992-12-11 1994-07-12 株式会社マキタ Vibrating drill

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0650714U (en) * 1992-12-11 1994-07-12 株式会社マキタ Vibrating drill

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6022053A (en) * 1997-03-27 2000-02-08 Flowell Corporation Joint for coupling tubes
KR100557186B1 (en) * 2000-08-31 2006-03-03 가부시키가이샤 후로웨루 Tube joint and tube fitting method therefor
KR20160003094U (en) * 2015-03-03 2016-09-19 주식회사유한훌로텍 Coupling structure of tube
CN105299369A (en) * 2015-08-07 2016-02-03 上海空间推进研究所 Bimetallic transition joint of metal bellows storage tank for propellant and manufacturing method of bimetallic transition joint

Also Published As

Publication number Publication date
JP2756929B2 (en) 1998-05-25

Similar Documents

Publication Publication Date Title
US4531577A (en) Heat exchanger with a plurality of individual tubular parts and process for the manufacture thereof
US5255943A (en) Welding sleeve and method for its manufacture
JPH08247353A (en) Tube joint
JPH04266684A (en) Jig and method for connecting metal tube
JPH0358586B2 (en)
JP2602756B2 (en) How to install fittings
JP2881577B2 (en) Tube fitting
JPH0742883A (en) Device for connecting synthetic resin pipe and method and jig for machining end of synthetic resin pipe
JP3441135B2 (en) Connection method of resin pipe joint and pipe material
JPH1089516A (en) Valve for plastic pipeline
JPH0310474Y2 (en)
JPS606713Y2 (en) Metal pipe fitting device
JP2002039488A (en) Pipe connecting structure and pipe fitting
JPH0453173B2 (en)
JPH0213832Y2 (en)
JPH0629583Y2 (en) Lock ring for pipe fittings
JPH0650715Y2 (en) Tube fittings
JP2681691B2 (en) Sealing method for aluminum OF cable connector
JPH08270873A (en) Electric fusion joint
JP2007154997A (en) Joint tube and joining method of cylindrical member using this
JPH0244151Y2 (en)
JPH06213383A (en) Connecting method for composite resin pipe
JPH0650714Y2 (en) Tube fittings
JPH07299823A (en) Manufacture of curved rubber hose
JP4471719B2 (en) Branched tube and manufacturing method thereof

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees