JPH0384294A - Pipe coupling - Google Patents
Pipe couplingInfo
- Publication number
- JPH0384294A JPH0384294A JP21781089A JP21781089A JPH0384294A JP H0384294 A JPH0384294 A JP H0384294A JP 21781089 A JP21781089 A JP 21781089A JP 21781089 A JP21781089 A JP 21781089A JP H0384294 A JPH0384294 A JP H0384294A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- cylinder member
- diameter
- diameter portion
- inner cylinder
- 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 2
- 238000010168 coupling process Methods 0.000 title abstract 2
- 238000005859 coupling reaction Methods 0.000 title abstract 2
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 31
- 238000003780 insertion Methods 0.000 claims abstract description 20
- 230000037431 insertion Effects 0.000 claims abstract description 20
- 230000002093 peripheral effect Effects 0.000 claims abstract description 16
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 230000003446 memory effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 description 5
- 238000005304 joining Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910017773 Cu-Zn-Al Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、管継手に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a pipe joint.
［従来の技術］ 従来より形状記憶合金を用いた管継手が知られている。[Conventional technology] Pipe joints using shape memory alloys have been known for some time.
この管継手は、第７図に示すように、両端開口の金属筒
で形成された内筒部材１０と、内筒部材１０の外周面に
嵌着された形状記憶合金製の外筒部材２０と、内筒部材
１０の内周面に被着された樹脂被膜３０とからなる。外
筒部材２０は加熱されて形状記憶効果による形状回復に
より内筒部材１０をかしめる。このかしめにより、この
管継手は、内筒部材１０に挿入されているパイプ８０．
９０と接合する。なお、上記加熱によって樹脂被膜３０
は溶融し、内筒部材１０とパイプ８０．９０との間の間
隙を封止する。As shown in FIG. 7, this pipe joint includes an inner cylinder member 10 formed of a metal cylinder with both ends open, and an outer cylinder member 20 made of a shape memory alloy that is fitted onto the outer peripheral surface of the inner cylinder member 10. , and a resin coating 30 adhered to the inner circumferential surface of the inner cylinder member 10. The outer cylindrical member 20 is heated and recovers its shape due to the shape memory effect, thereby caulking the inner cylindrical member 10. By this caulking, this pipe joint is connected to the pipe 80 inserted into the inner cylinder member 10.
Connect with 90. Note that the resin coating 30 is
melts and seals the gap between the inner cylinder member 10 and the pipe 80,90.
また、形状記憶合金を用いた他の管継手として、第８図
に示すように、形状記憶合金筒製の縮径筒部材１０ａと
、その内周面に被着された樹脂被膜３０ａとからなるも
のもある。この管継手では、縮径筒部材１０ａが縮径し
て樹脂被膜３０ａを介してパイプ８０．９０と接合する
。In addition, as shown in FIG. 8, another pipe joint using a shape memory alloy is composed of a reduced diameter cylindrical member 10a made of a shape memory alloy cylinder and a resin coating 30a coated on the inner circumferential surface of the cylindrical member 10a. There are some things. In this pipe joint, the reduced diameter cylindrical member 10a is reduced in diameter and joined to the pipe 80.90 via the resin coating 30a.
［発明が解決しようとする課題］
しかしながら上記した従来の管継手では、内筒部材１０
の各端面よりそれぞれ挿入されるパイプ８０．９０の挿
入深さを所定深さとするのに手間がかかるという問題が
あった。以下、この問題を詳細に説明する。[Problems to be Solved by the Invention] However, in the conventional pipe joint described above, the inner cylinder member 10
There is a problem in that it takes time and effort to set the insertion depth of the pipes 80 and 90 inserted from each end face to a predetermined depth. This problem will be explained in detail below.
形状記憶合金を用いる管継手では、外筒部材２０の縮径
によるかしめ力が内筒部材１０及び樹脂被膜３０を介し
てパイプ８０及びパイプ９０になるべく均等に分散し、
内筒部材１０とパイプ８０との接合強度及び内筒部材１
０とパイプ９０との接合強度がなるべく均等になること
が望ましい。In a pipe joint using a shape memory alloy, the caulking force due to the diameter reduction of the outer cylinder member 20 is distributed as evenly as possible to the pipes 80 and 90 via the inner cylinder member 10 and the resin coating 30,
Bonding strength between the inner cylinder member 10 and the pipe 80 and the inner cylinder member 1
It is desirable that the bonding strength between the pipe 90 and the pipe 90 be as equal as possible.
そのためには、内筒部材１０へのパイプ８０の挿入深さ
と、内筒部材１０へのパイプ８０の挿入深さとをほぼ一
致させる必要がある。For this purpose, it is necessary that the insertion depth of the pipe 80 into the inner cylinder member 10 and the insertion depth of the pipe 80 into the inner cylinder member 10 are approximately the same.
このために従来の管継手では、一方のパイプ８０の外周
面の所定位置に予め刻印しておき、パイプ８０の刻印位
置が内筒部材１０の端部と隣接するまでパイプ８０を内
筒部材１０に挿入し、次に、パイプ８０を上記挿入状態
で保持しつつ他方のパイプ９０を内筒部材１０に挿入し
、その後、パイプ８０．９０と、内筒部材１０との相対
位置を固定しつつ管継手を加熱して外筒部材２０を形状
回復させ、外筒部材２０の縮径により内筒部材１０をか
しめて、管継手とパイプ８０及び９０とのジヨイントを
完了している。For this reason, in conventional pipe fittings, a predetermined position is engraved on the outer peripheral surface of one pipe 80, and the pipe 80 is inserted into the inner cylindrical member 10 until the engraved position of the pipe 80 is adjacent to the end of the inner cylindrical member 10. Next, while holding the pipe 80 in the inserted state, insert the other pipe 90 into the inner cylinder member 10, and then, while fixing the relative positions of the pipes 80 and 90 and the inner cylinder member 10. The pipe joint is heated to recover the shape of the outer cylinder member 20, and the inner cylinder member 10 is caulked by reducing the diameter of the outer cylinder member 20, thereby completing the joint between the pipe joint and the pipes 80 and 90.
なお、第８図に示す管継手においても、同じ問題がある
。Note that the same problem exists in the pipe joint shown in FIG.
このような従来方法では、パイプ８０の正確な所定位置
へ一々刻印することが面倒であり、更に、外筒部材２０
の縮径が開始されるまで、管継手とパイプ８０．９０と
の間に相対位置が変化しないようにそれらを保持する手
段を講じる必要があった。In such a conventional method, it is troublesome to stamp each accurate predetermined position on the pipe 80, and furthermore,
It was necessary to take measures to hold the fitting and the pipe 80,90 so that their relative positions do not change until the diameter reduction of the pipe 80,90 begins.
本発明はこのような課題に鑑みなされたものであり、パ
イプの位置合せ及び外筒部材又は縮径筒部材の縮径前に
おけるパイプなどの位置保持が簡単で、パイプと管継手
との結合力のばらつきが少ない管継手を提供することを
解決すべき課題としている。The present invention was made in view of the above problems, and it is easy to align the pipe and maintain the position of the pipe before the diameter of the outer cylinder member or the diameter-reducing cylinder member is reduced, and the bonding force between the pipe and the pipe joint is reduced. The problem to be solved is to provide a pipe joint with less variation in
［課題を解決するための手段］
第１発明の管継手は、被接続管の挿入が可能な両端開口
の金属筒で形成された内筒部材と、該内筒部材の外周面
に嵌着され形状記憶効果に基づく形状回復により縮径し
て該内筒部材をかしめる形状記憶合金筒製の外筒部材と
、前記内筒部材の内周面を被覆する樹脂被膜とを有する
管継手において、前記内筒部材が、径小な径小部と、該
径小部の少なくとも一端部に設けられて長手方向に所定
長をもつ径大な径大部と、該径大部と前記径小部との境
界に位置して前記径大部への前記被接続管の挿入を規制
する段差部とをもち、前記外筒部材が、前記径大部を縮
径して前記径大部と前記被接続管とを接合するべく前記
内筒部材の前記径大部の外周面に嵌着されていることを
特徴としている。[Means for Solving the Problems] The pipe joint of the first invention includes an inner cylinder member formed of a metal cylinder with openings at both ends into which a pipe to be connected can be inserted, and a pipe fitting fitted onto the outer circumferential surface of the inner cylinder member. A pipe joint having an outer cylinder member made of a shape memory alloy cylinder whose diameter is reduced by shape recovery based on a shape memory effect and caulks the inner cylinder member, and a resin coating covering an inner circumferential surface of the inner cylinder member, The inner cylinder member has a small diameter portion, a large diameter portion provided at at least one end of the small diameter portion and having a predetermined length in the longitudinal direction, and the large diameter portion and the small diameter portion. and a stepped portion located at the boundary between the large-diameter portion and the stepped portion that restricts insertion of the connected pipe into the large-diameter portion, and the outer cylindrical member reduces the diameter of the large-diameter portion to connect the large-diameter portion and the covered pipe. It is characterized in that it is fitted onto the outer circumferential surface of the large-diameter portion of the inner cylindrical member in order to join the connecting pipe.
第２発明の管継手は、被接続管の挿入が可能な両端開口
の形状記憶合金筒で形成され形状記憶効果に基づく形状
回復により縮径して前記被接続管に接合する縮径筒部材
と、前記縮径筒部材の内周面を被覆する樹脂被膜とを有
する管継手において、前記縮径筒部材が、径小な径小部
と、該径小部の少なくとも一端部に設けられて長手方向
に所定長をもつ径大部と、該径大部と前記径小部との境
界に位置して前記径大部への前記被接続管の挿入を規制
する段差部とをもつことを特徴としている。The pipe joint of the second invention includes a diameter-reducing cylindrical member formed of a shape memory alloy cylinder with openings at both ends into which a pipe to be connected can be inserted, and which reduces in diameter by shape recovery based on the shape memory effect and joins to the pipe to be connected. , a pipe joint having a resin coating covering an inner circumferential surface of the diameter-reducing cylindrical member, wherein the diameter-reducing cylindrical member is provided with a small-diameter portion and at least one end of the small-diameter portion; It is characterized by having a large diameter part having a predetermined length in the direction, and a step part located at the boundary between the large diameter part and the small diameter part and regulating insertion of the connected pipe into the large diameter part. It is said that
管継手は、一般には円筒断面をもつが、他の形状の断面
をもつことができる。Pipe fittings generally have a cylindrical cross-section, but can have cross-sections of other shapes.
径大部は、素材となる管を機械的に拡径して形成でき、
また、径小部は、素材となる管を機械的に縮径して形成
できる。The large diameter part can be formed by mechanically expanding the diameter of the raw material tube.
Further, the small diameter portion can be formed by mechanically reducing the diameter of the tube as a material.
上記外筒部材や縮径筒部材に、形状記憶合金の変態点以
上の温度で不可逆的に変色する示温樹脂膜を塗布するこ
とができ、このようにすれば、縮径を確認することがで
きる。A temperature-indicating resin film that irreversibly changes color at a temperature higher than the transformation point of the shape memory alloy can be applied to the outer cylinder member and diameter-reducing cylinder member, and in this way, diameter reduction can be confirmed. .
［作用］
第１発明の管継手において、内筒部材の段差部は、挿入
された被接続管と当接して、被接続管の所定長さ以上の
挿入を禁止し、被接続部材の挿入深さを規定する。そし
て、外筒部材は加熱されて形状記憶効果による形状回復
により縮径して内筒部材の径大部をかしめ、かしめられ
て径大部はその内部に挿入された被接続管に圧着され、
樹脂被膜は溶融して内筒部材の径大部と被接続管との間
の隙間を封止する。[Function] In the pipe joint of the first invention, the stepped portion of the inner cylinder member comes into contact with the inserted pipe to be connected, prohibits insertion of the pipe to be connected beyond a predetermined length, and reduces the insertion depth of the connected member. Define the Then, the outer cylinder member is heated and reduced in diameter due to shape recovery due to the shape memory effect, and the large diameter part of the inner cylinder member is caulked, and the large diameter part is crimped to the connected pipe inserted inside the inner cylinder member,
The resin coating melts and seals the gap between the large diameter portion of the inner cylinder member and the connected pipe.
第２発明の管継手において、縮径筒部材の段差部は、挿
入された被接続管と衝接して、被接続管の所定長さ以上
の挿入を禁止し、被接続部材の挿入深さを規定する。そ
して、縮径筒部材は加熱されて形状記憶効果による形状
回復により縮径してその内部に挿入された被接続管に圧
着され、樹脂被膜は溶融して内筒部材の径大部と被接続
管との間の隙間を封止する。In the pipe joint of the second invention, the stepped portion of the diameter-reducing cylindrical member collides with the inserted pipe to be connected, prohibits insertion of the pipe to be connected beyond a predetermined length, and limits the insertion depth of the pipe to be connected. stipulate. Then, the diameter-reduced cylindrical member is heated and reduced in diameter due to shape recovery due to the shape memory effect, and is compressed to the connected pipe inserted therein, and the resin coating is melted and the large-diameter portion of the inner cylindrical member and the connected pipe are compressed. Seal the gap between the pipe and the pipe.
［実施例］
以下、本発明の管継手の各実施例を図面により説明する
。なお、各図は、接合後の状態を示している。[Example] Hereinafter, each example of the pipe joint of the present invention will be described with reference to the drawings. Note that each figure shows the state after bonding.
（実施例１）
゛第１発明の管継手の一実施例を第１図により説明する
。(Embodiment 1) An embodiment of the pipe joint of the first invention will be described with reference to FIG.
この管継手は、両端開口で管状に形成された内筒部材１
と、内筒部材１の外周面１ａに嵌着された外筒部材２と
、内筒部材１の内周面１ａを被覆する樹脂被膜３とから
なり、内筒部材１には被接続管（以下パイプという）８
．９が両側から挿入されている。This pipe joint has an inner cylindrical member 1 formed into a tubular shape with openings at both ends.
, an outer cylinder member 2 fitted onto the outer peripheral surface 1a of the inner cylinder member 1, and a resin coating 3 covering the inner peripheral surface 1a of the inner cylinder member 1, and the inner cylinder member 1 has a connected pipe ( (hereinafter referred to as pipe) 8
．． 9 is inserted from both sides.
内筒部材１は、径小な径小部１ｂと、径小部１ｂの両端
部に同一軸心となるように設けられた径大な径大部ＩＣ
とをもち、径大部ＩＣと径小部１ｂとの境界には、径大
部ＩＣへのパイプ８．９の挿入を規制する二つの段差部
１ｄが形成されている。内筒部材１は、アルミ合金製の
円筒部材を素材として径大部ＩＣの部分を拡径して形成
されている。The inner cylindrical member 1 includes a small diameter portion 1b and a large diameter portion IC provided at both ends of the small diameter portion 1b so as to be coaxial.
Two step portions 1d are formed at the boundary between the large diameter portion IC and the small diameter portion 1b to restrict insertion of the pipe 8.9 into the large diameter portion IC. The inner cylindrical member 1 is made of a cylindrical member made of aluminum alloy and is formed by expanding the diameter of the large diameter portion IC.
外筒部材２は、Ｃｕ−Ｚｎ−Ａｌ系の形状記憶合金を素
材とする円筒部材からなり、内筒部材１の各径大部１Ｃ
の外周面に嵌着されている。この外筒部材２には、内径
部材１の外径よりも約４％程度拡径したものが用いられ
ている。The outer cylindrical member 2 is a cylindrical member made of a Cu-Zn-Al type shape memory alloy, and each large diameter portion 1C of the inner cylindrical member 1
It is fitted on the outer peripheral surface of. The outer cylindrical member 2 has a diameter that is approximately 4% larger than the outer diameter of the inner diameter member 1.
樹脂被膜３は、膜厚が約１００μｍのエポキシ樹脂被膜
からなり、内筒部材１の内周面の全面にコーティングさ
れている。The resin coating 3 is made of an epoxy resin coating having a thickness of approximately 100 μm, and is coated on the entire inner circumferential surface of the inner cylinder member 1.
内筒部材１の径大部ＩＣにはパイプ８．９が挿通されて
、おり、パイプ８．９の先端は樹脂被膜３を介して段差
部１ｄに当接している。また、パイプ８．９の外周面は
樹脂被膜３を介して内筒部材１の内周面に密接しており
、樹脂被膜３はパイプ８、．９と内筒部材１の径大部Ｉ
Ｃとの間の間隙を封止している。A pipe 8.9 is inserted through the large diameter portion IC of the inner cylinder member 1, and the tip of the pipe 8.9 is in contact with the stepped portion 1d via the resin coating 3. Further, the outer circumferential surface of the pipe 8.9 is in close contact with the inner circumferential surface of the inner cylinder member 1 via the resin coating 3, and the resin coating 3 is in contact with the inner circumferential surface of the pipe 8, . 9 and the large diameter portion I of the inner cylinder member 1
The gap between C and C is sealed.
次に、この管継手の組立てを説明する。Next, the assembly of this pipe joint will be explained.
まず、内周面に樹脂被膜３がコーティングされ径大部Ｉ
Ｃが形成された内筒部材１を準備し、次に、外筒部材２
の内径を内筒部材１の径大部ＩＣの外径より約４％程度
径小に形成する。First, a resin film 3 is coated on the inner peripheral surface of the large diameter portion I.
Prepare the inner cylinder member 1 in which C is formed, and then prepare the outer cylinder member 2.
The inner diameter of the inner cylinder member 1 is approximately 4% smaller than the outer diameter of the large diameter portion IC of the inner cylinder member 1.
次に、外筒部材２の内部に先端部がやや先細テーパ状と
なった金属円柱部材〈図示せず〉を押入し、外筒部材２
の内径を７〜８％程度、拡径する。Next, a metal cylindrical member (not shown) with a slightly tapered tip is pushed into the outer cylinder member 2, and the outer cylinder member 2
Expand the inner diameter by about 7 to 8%.
なお、この拡径は外筒部材２と上記金属円柱部材との間
にポリエチレンチューブを介装した状態で実施される。Note that this diameter expansion is performed with a polyethylene tube interposed between the outer cylinder member 2 and the metal cylindrical member.
これは金属円柱部材の円滑な押入を可能とするためであ
る。次に、拡径された外筒部材２を内筒部材１の径大部
１Ｃの外周面に嵌着する。このようにして、管継手の製
造が完了する。This is to enable smooth insertion of the metal cylindrical member. Next, the diameter-expanded outer cylinder member 2 is fitted onto the outer peripheral surface of the large-diameter portion 1C of the inner cylinder member 1. In this way, the manufacture of the pipe joint is completed.
次に管継手によるパイプ８．９のジヨイントを説明する
。Next, the joint of the pipe 8.9 using the pipe joint will be explained.
パイプ８．９の先端が各段差部１ｄにそれぞれ衝接する
まで、常温状態の管継手にパイプ８．９を挿入する。次
に、パイプ８．９と各段差部１ｄとの間に隙間が生じな
いように、ある程度の付勢力でパイプ８．９を互いに逆
方向に押圧しつつ、外筒部材２を２００℃まで加熱する
。約１５０’Ｃ以上に加熱された外筒部材２は形状記憶
が回復して縮径し、内筒部材１の径大部ＩＣの外周面全
体を均一な圧縮力でかしめ、かしめられた内筒部材１の
径大部１Ｃは樹脂被膜３を介してパイプ８．９に圧接さ
れる。The pipe 8.9 is inserted into the pipe joint at room temperature until the tip of the pipe 8.9 abuts each step portion 1d. Next, the outer cylindrical member 2 is heated to 200° C. while pressing the pipes 8.9 in opposite directions with a certain amount of urging force so that no gaps are created between the pipe 8.9 and each stepped portion 1d. do. The outer cylindrical member 2 heated to about 150'C or more recovers its shape memory and contracts in diameter, and the entire outer peripheral surface of the large diameter portion IC of the inner cylindrical member 1 is caulked with a uniform compressive force to form a crimped inner cylinder. The large diameter portion 1C of the member 1 is pressed against the pipe 8.9 via the resin coating 3.
また、上記加熱により樹脂液ＷＡ３が溶融して内筒部材
１の径大部ＩＣとパイプ８．９との間の微小な間隙を気
密に充填し、その後、樹脂被膜３は熱硬化して内筒部材
１及びパイプ８．９を相互に接合する。Further, the resin liquid WA3 is melted by the heating and airtightly fills the minute gap between the large-diameter portion IC of the inner cylinder member 1 and the pipe 8.9, and then the resin coating 3 is thermally cured and The cylindrical member 1 and the pipe 8.9 are joined together.
以上説明したように、この実施例の管継手では、内筒部
材１が段差部１ｄを具備しているので、パイプ８．９の
挿入深さを常に一定とすることができ、その挿入不足に
よる径大部１Ｃとパイプ８．９との接合強度及び封止の
不足を防止することができる。As explained above, in the pipe joint of this embodiment, since the inner cylinder member 1 is provided with the step portion 1d, the insertion depth of the pipe 8.9 can always be constant, and Insufficient bonding strength and sealing between the large-diameter portion 1C and the pipe 8.9 can be prevented.
また、この実施例の管継手では、内筒部材１の径大部１
Ｃに挿入されたパイプ８．９を互いに逆方向に付勢する
ことにより、内筒部材１とパイプ８．９との間の相対変
位を防止することができる。In addition, in the pipe joint of this embodiment, the large diameter portion 1 of the inner cylinder member 1
By biasing the pipes 8.9 inserted into C in opposite directions, relative displacement between the inner cylinder member 1 and the pipes 8.9 can be prevented.
更に、この実施例では、内筒部材１の径小部１ｂとパイ
プ８．９とを同一内径としているので、流体抵抗の増加
を減らすことができる。なお、この実施例のように、た
とえ内筒部材１の径小部１ｂとパイプ８、−９とが同一
内径でなくても、少なくとも内筒部材の径小部１ｂと径
大部１Ｃとの差だけは、パイプ８．９の肉厚による段差
を減殺することができ、流体抵抗を低減することができ
る。Furthermore, in this embodiment, since the small diameter portion 1b of the inner cylinder member 1 and the pipe 8.9 have the same inner diameter, an increase in fluid resistance can be reduced. Note that, as in this embodiment, even if the small diameter portion 1b of the inner cylinder member 1 and the pipes 8, -9 do not have the same inner diameter, at least the small diameter portion 1b and the large diameter portion 1C of the inner cylinder member 1 do not have the same inner diameter. Only the difference can reduce the level difference due to the wall thickness of the pipe 8.9, and the fluid resistance can be reduced.
（実施例２） 第２発明の管継手の一実施例を第２図に示す。(Example 2) An embodiment of the pipe joint of the second invention is shown in FIG.
この管継手は、形状記憶合金製で両端が開口された円筒
状の縮径筒部材６と、縮径筒部材６の内周面を被覆する
樹脂被膜７とからなり、縮径筒部材６にはパイプ８．９
が両側から挿入されている。This pipe joint consists of a cylindrical diameter-reducing tube member 6 made of a shape memory alloy and open at both ends, and a resin coating 7 that covers the inner peripheral surface of the diameter-reducing tube member 6. is pipe 8.9
are inserted from both sides.
縮径筒部材６は、径小な径小部６ｂと、径小部６ｂの両
端部に同軸に設けられた径大な径大部６Ｃとをもち、径
大部６Ｃと径小部６ｂとの境界には、径大部６Ｃへの被
接続管８．９の挿入を規制する二つの段差部６ｄが形成
されている。縮径筒部材６の素材は実施例１の外筒部材
２と同一のものを用いてあり、縮径筒部材６及び樹脂被
膜７は、実施例１の内筒部材１及び樹脂被膜３とほぼ同
一形状に形成されている。The diameter-reducing cylindrical member 6 has a small-diameter portion 6b with a small diameter and a large-diameter portion 6C coaxially provided at both ends of the small-diameter portion 6b. Two stepped portions 6d are formed at the boundary to restrict insertion of the connected tube 8.9 into the large diameter portion 6C. The diameter reducing cylinder member 6 is made of the same material as the outer cylinder member 2 of the first embodiment, and the diameter reducing cylinder member 6 and the resin coating 7 are almost the same as the inner cylinder member 1 and the resin coating 3 of the first embodiment. They are formed in the same shape.
本実施例では、縮径筒部材６の形状回復による縮径によ
り、縮径部材６が樹脂液１１７を介してパイプ８．９の
外周面に接合される。In this embodiment, the diameter reducing member 6 is joined to the outer circumferential surface of the pipe 8.9 via the resin liquid 117 by reducing the diameter by restoring the shape of the diameter reducing cylindrical member 6.
この実施例においても、縮径部材６の段差部６ｄは実施
例１で述べた効果と同様の効果を奏することができ、か
つ、形状記憶合金量は増加するものの管継手の構造が更
に簡単となる。In this embodiment as well, the stepped portion 6d of the diameter reducing member 6 can produce the same effect as described in the first embodiment, and although the amount of shape memory alloy increases, the structure of the pipe joint is simpler. Become.
（実施例３）
第１発明の管継手の他の実施例を第３図により説明する
。(Embodiment 3) Another embodiment of the pipe joint of the first invention will be described with reference to FIG.
この管継手は、両端開口で管状に形成された金属製の内
筒部材１３と、内筒部材１３の外周面に嵌着された形状
記憶合金製の外筒部材２３．２４と、内筒部材１３の内
周面を被覆する樹脂被膜３３とからなり、内筒部材１３
にはパイプ８３．９３が両側から挿入されている。This pipe joint includes a metal inner cylinder member 13 formed into a tubular shape with openings at both ends, an outer cylinder member 23 and 24 made of a shape memory alloy fitted to the outer peripheral surface of the inner cylinder member 13, and an inner cylinder member. and a resin coating 33 that covers the inner peripheral surface of the inner cylinder member 13.
Pipes 83,93 are inserted from both sides.
内筒部材１３は、径小な径小部’１３ｂと、径小部１３
ｂの一端部に設けられた径大な径大部１３Ｃとをもち、
径大部１３Ｃと径小部１３ｂとの境界には、径大部１３
ｃへの被接続管８３の挿入を規制する段差部１３ｄが形
成されているａなお、内筒部材１３は、実施例１の内筒
部材１からその一つの径大部１Ｃを切除したものとほぼ
同一形状となっている。The inner cylinder member 13 has a small diameter portion '13b and a small diameter portion '13b.
It has a large-diameter portion 13C provided at one end of b,
The large diameter portion 13 is located at the boundary between the large diameter portion 13C and the small diameter portion 13b.
A stepped portion 13d is formed to restrict the insertion of the connected pipe 83 into the inner cylinder member 13a.The inner cylinder member 13 is obtained by cutting out one large diameter portion 1C from the inner cylinder member 1 of the first embodiment. They have almost the same shape.
外筒部材２３．２４は、内筒部材１３の径小部１３ｂ及
び径大部１３Ｃの外周面に個別に圧着されている。The outer cylindrical members 23 and 24 are individually crimped onto the outer peripheral surfaces of the small diameter portion 13b and the large diameter portion 13C of the inner cylindrical member 13.
パイプ８３は内筒部材１３の径大部１３Ｃに、パイプ９
３は内筒部材１３の径小部１３ｂに挿入されている。The pipe 83 is connected to the large diameter portion 13C of the inner cylinder member 13, and the pipe 9
3 is inserted into the small diameter portion 13b of the inner cylinder member 13.
この実施例の管継手の接合方法を説明すれば、まず、パ
イプ８３をその先端が段差部１３ｄに衝接するまで挿入
し、次に、パイプ９３をその先端がパイプ８３の先端に
衝接するまで挿入する。その後、実施例１と同様にして
外筒部材２３．２４゜をかしめる。To explain the joining method of the pipe joint of this embodiment, first, the pipe 83 is inserted until its tip collides with the stepped portion 13d, and then the pipe 93 is inserted until its tip collides with the tip of the pipe 83. do. Thereafter, the outer cylinder member 23.24° is caulked in the same manner as in Example 1.
このようにすれば、実施例１で述べたと同様な効果を奏
することができる。In this way, the same effects as described in the first embodiment can be achieved.
（実施例４） 第２発明の管継手の他の実施例を第４図に示す。(Example 4) Another embodiment of the pipe joint of the second invention is shown in FIG.
・この管継手は、縮径筒部材６０と樹脂被膜７０とから
なる。- This pipe joint consists of a diameter-reduced cylindrical member 60 and a resin coating 70.
縮径筒部材６０は形状合金部製で実施例３の内筒部材１
０とほぼ同一形状に形成されている。The reduced diameter cylindrical member 60 is made of a shaped alloy part and is the same as the inner cylindrical member 1 of Embodiment 3.
It is formed in almost the same shape as 0.
この実施例において、縮径による接合作用は実施例２と
同様であり、パイプ８０，９０の位置決め作用は実施例
３と同様である。In this embodiment, the joining action by diameter reduction is the same as in the second embodiment, and the positioning action of the pipes 80 and 90 is the same as in the third embodiment.
（実施例５）
第１発明の管継手の他の実施例を第５図により説明する
。(Example 5) Another example of the pipe joint of the first invention will be described with reference to FIG.
この管継手は、内筒部材１２と、外筒部材２２．２３と
、内筒部材１２の内周面を被覆する樹脂被膜３２とから
なり、実施例３の外筒部材２１に代えて、内筒部材１２
の径小部１２ｂの外周面にパイプ９１の内周面が接合さ
れている。This pipe joint consists of an inner cylinder member 12, an outer cylinder member 22, 23, and a resin coating 32 that covers the inner circumferential surface of the inner cylinder member 12. Cylindrical member 12
The inner peripheral surface of the pipe 91 is joined to the outer peripheral surface of the small diameter portion 12b.
すなわち、この実施例では、内筒部材１２はその一端部
において螺子継手となっており、他端部では形状記憶合
金継手の一部となっている。That is, in this embodiment, the inner cylinder member 12 is a screw joint at one end, and a part of a shape memory alloy joint at the other end.
なお、この実施例において、パイプ９０の外周面と内筒
部材１２の径小部１２ｂの内周面とを螺合して両者を接
合させることもできる。In this embodiment, the outer circumferential surface of the pipe 90 and the inner circumferential surface of the small diameter portion 12b of the inner cylinder member 12 may be screwed together to join them together.
（実施例６〉 第２発明の管継手の他の実施例を第６図に示す。(Example 6) Another embodiment of the pipe joint of the second invention is shown in FIG.
この管継手は、縮径筒部材６１と樹脂被膜７１とからな
る。縮径筒部材６１は形状合金部製で実施例５の内筒部
材１２とほぼ同一形状に形成されている。This pipe joint consists of a diameter-reduced cylindrical member 61 and a resin coating 71. The diameter-reduced cylindrical member 61 is made of shape alloy and has substantially the same shape as the inner cylindrical member 12 of the fifth embodiment.
この実施例において、縮径による接合作用及びパイプ８
０の位置決め作用は実施例５と同様である。In this embodiment, the joining effect due to diameter reduction and the pipe 8
The positioning action of 0 is the same as in the fifth embodiment.
［発明の効果］
第１発明の管継手は内筒部材の内周面の所定位置に段差
部をもち、第２発明の管継手は縮径筒部材の内周面の所
定位置に段差部をもつので、被接続管を内筒部材に挿入
する時に被接続管を段差部に衝接させて被接続管の挿入
深度を規定することができる、その結果、被接続管と管
継手との位置合せ作業が極めて容易となる。[Effects of the Invention] The pipe joint of the first invention has a stepped portion at a predetermined position on the inner circumferential surface of the inner cylindrical member, and the pipe fitting of the second invention has a stepped portion at a predetermined position on the inner circumferential surface of the diameter-reducing cylindrical member. Therefore, when the pipe to be connected is inserted into the inner cylinder member, the insertion depth of the pipe to be connected can be determined by making it collide with the stepped part, and as a result, the position of the pipe to be connected and the pipe fitting can be adjusted. The alignment work becomes extremely easy.
また、上記各発明の管継手では、各被接続管が内筒部材
若しくは縮径筒部材に挿入された各被接続管を互いに逆
方向に付勢することにより、管継手と各被接続管とのか
しめが完了するまでになんらかの外力が加わっても、被
接続管と管継手との間の相対変位を防止することができ
、管継手と被接続管との接合力及びシール性が不十分と
なるのを防止する。In addition, in the pipe fittings of the above inventions, each connected pipe is inserted into the inner cylinder member or the diameter-reduced cylinder member and the connected pipes are urged in opposite directions, so that the pipe joint and each connected pipe are connected to each other. Even if some external force is applied until caulking is completed, relative displacement between the pipe to be connected and the pipe fitting can be prevented, and the joining force and sealing performance between the pipe fitting and the pipe to be connected can be prevented. prevent it from becoming
第１図は第１発明の管継手の一実施例を示す模式断面図
、第２図は第２発明の管継手の一実施例を示す模式断面
図、第３図は第１発明の管継手の他の実施例を示す模式
断面図、第４図は第２発明の管継手の他の一実施例を示
す模式断面図、第５図は第１発明の管継手の他の一実施
例を示す模式断面図、第６図は第２発明の管継手の他の
一実施例を示す模式断面図、第７図及び第８図は従来の
管継手の模式断面図である。
１・・・内筒部材 １ｂ・・・径小部１Ｃ・・・
径大部 １ｄ・・・段差部２・・・外筒部材
３・・・樹脂被膜Fig. 1 is a schematic sectional view showing an embodiment of the pipe fitting of the first invention, Fig. 2 is a schematic sectional view showing an embodiment of the pipe fitting of the second invention, and Fig. 3 is the pipe fitting of the first invention. FIG. 4 is a schematic sectional view showing another embodiment of the pipe joint of the second invention, and FIG. 5 is a schematic sectional view showing another embodiment of the pipe joint of the first invention. FIG. 6 is a schematic cross-sectional view showing another embodiment of the pipe joint of the second invention, and FIGS. 7 and 8 are schematic cross-sectional views of a conventional pipe joint. 1... Inner cylinder member 1b... Small diameter portion 1C...
Large diameter portion 1d...Stepped portion 2...Outer cylinder member 3...Resin coating
Claims (4)
された内筒部材と、該内筒部材の外周面に嵌着され形状
記憶効果に基づく形状回復により縮径して該内筒部材を
かしめる形状記憶合金筒製の外筒部材と、前記内筒部材
の内周面を被覆する樹脂被膜とを有する管継手において
、 前記内筒部材は、径小な径小部と、該径小部の少なくと
も一端部に設けられて長手方向に所定長をもつ径大な径
大部と、該径大部と前記径小部との境界に位置して前記
径大部への前記被接続管の挿入を規制する段差部とをも
ち、 前記外筒部材は、前記径大部を縮径して前記径大部と前
記被接続管とを接合するべく前記内筒部材の前記径大部
の外周面に嵌着されていることを特徴とする管継手。(1) An inner cylindrical member formed of a metal cylinder with openings at both ends into which a pipe to be connected can be inserted; In a pipe joint having an outer cylinder member made of a shape memory alloy cylinder for caulking the cylinder member, and a resin coating covering an inner circumferential surface of the inner cylinder member, the inner cylinder member has a small diameter portion; a large diameter part provided at least at one end of the small diameter part and having a predetermined length in the longitudinal direction; and a large diameter part located at the boundary between the large diameter part and the small diameter part and extending to the large diameter part. The outer cylinder member has a step portion that restricts insertion of the connected pipe, and the outer cylinder member reduces the diameter of the large diameter part to join the large diameter part and the connected pipe. A pipe joint characterized by being fitted onto the outer peripheral surface of most of the pipe joint.
状回復後において前記被接続管と同一内径を有している
特許請求の範囲第１項記載の管継手。(2) The pipe joint according to claim 1, wherein the small diameter portion of the inner cylinder member has the same inner diameter as the connected pipe after the outer cylinder member recovers its shape.
筒で形成され形状記憶効果に基づく形状回復により縮径
して前記被接続管に接合する縮径筒部材と、前記縮径筒
部材の内周面を被覆する樹脂被膜とを有する管継手にお
いて、 前記縮径筒部材は、径小な径小部と、該径小部の少なく
とも一端部に設けられて長手方向に所定長をもつ径大部
と、該径大部と前記径小部との境界に位置して前記径大
部への前記被接続管の挿入を規制する段差部とをもつこ
とを特徴とする管継手。(3) a diameter-reducing cylindrical member formed of a shape-memory alloy cylinder with openings at both ends into which a pipe to be connected can be inserted, whose diameter is reduced by shape recovery based on the shape-memory effect and joined to the pipe to be connected; In a pipe joint having a resin coating covering an inner circumferential surface of the member, the diameter-reducing cylindrical member has a small-diameter portion and a predetermined length in the longitudinal direction provided at at least one end of the small-diameter portion. 1. A pipe joint comprising: a large-diameter portion; and a stepped portion located at a boundary between the large-diameter portion and the small-diameter portion to restrict insertion of the connected pipe into the large-diameter portion.
形状回復後において前記被接続管と同一内径を有してい
る特許請求の範囲第２項記載の管継手。(4) The pipe joint according to claim 2, wherein the reduced diameter portion of the reduced diameter cylindrical member has the same inner diameter as the connected pipe after the outer cylindrical member recovers its shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21781089A JPH0384294A (en) | 1989-08-24 | 1989-08-24 | Pipe coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21781089A JPH0384294A (en) | 1989-08-24 | 1989-08-24 | Pipe coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0384294A true JPH0384294A (en) | 1991-04-09 |
Family
ID=16710095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21781089A Pending JPH0384294A (en) | 1989-08-24 | 1989-08-24 | Pipe coupling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0384294A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2726055A1 (en) * | 1994-10-21 | 1996-04-26 | Fiat Auto Spa | METHOD OF ASSEMBLING TUBULAR ELEMENTS |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60143287A (en) * | 1983-12-29 | 1985-07-29 | 松下電器産業株式会社 | Method of connecting pipe |
| JPS61112884A (en) * | 1984-11-05 | 1986-05-30 | 松下電器産業株式会社 | Piping connector |
| JPS61116193A (en) * | 1984-11-13 | 1986-06-03 | 住友軽金属工業株式会社 | Method of connecting metallic pipe |
| JPS6215677B2 (en) * | 1977-10-25 | 1987-04-08 | Suzuki Metal Industry Co Ltd |
-
1989
- 1989-08-24 JP JP21781089A patent/JPH0384294A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6215677B2 (en) * | 1977-10-25 | 1987-04-08 | Suzuki Metal Industry Co Ltd | |
| JPS60143287A (en) * | 1983-12-29 | 1985-07-29 | 松下電器産業株式会社 | Method of connecting pipe |
| JPS61112884A (en) * | 1984-11-05 | 1986-05-30 | 松下電器産業株式会社 | Piping connector |
| JPS61116193A (en) * | 1984-11-13 | 1986-06-03 | 住友軽金属工業株式会社 | Method of connecting metallic pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2726055A1 (en) * | 1994-10-21 | 1996-04-26 | Fiat Auto Spa | METHOD OF ASSEMBLING TUBULAR ELEMENTS |
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