JP2012112411A - Joint member, resin pipe and pipe connecting structure - Google Patents

Joint member, resin pipe and pipe connecting structure Download PDF

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Publication number
JP2012112411A
JP2012112411A JP2010260062A JP2010260062A JP2012112411A JP 2012112411 A JP2012112411 A JP 2012112411A JP 2010260062 A JP2010260062 A JP 2010260062A JP 2010260062 A JP2010260062 A JP 2010260062A JP 2012112411 A JP2012112411 A JP 2012112411A
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Prior art keywords
resin
joint member
tube
pipe
peripheral surface
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Takuya Tsunoda
卓也 角田
Atsuko Kawabata
厚子 川端
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Togawa Rubber Co Ltd
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Togawa Rubber Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a joint member which has a small number of components and is simple configuration and moreover prevents a connecting part from being bulked as well as a resin pipe and pipe connecting structure.SOLUTION: The joint member 1 has a cylindrical part 2 made of a resin and a sealing part 3 which is disposed over outer peripheral surface of the cylindrical part 2 and seals inner peripheral surface of a metallic pipe 7 and outer peripheral surface of a resin pipe 6 when inserting the resin pipe 6 into the metallic pipe in such a state as to fit the cylindrical part 2 over end of the resin pipe 6.

Description

本発明は、樹脂管と金属管との管接続構造に関するものである。   The present invention relates to a pipe connection structure between a resin pipe and a metal pipe.

樹脂管と金属管とを接続する従来の管接続構造としては、例えば、特許文献１のように、雌側管（金属管）及び雄側管（樹脂管）のそれぞれの端部に雌側継手及び雄側継手を設けてあるものが知られている。当該管接続構造では、雄側継手を雌側継手に挿入した後、雌側継手及び雄側継手の両方のフランジ部に亘るように外側からクイックファスナーを取り付けることによって樹脂管と金属管とを接続する。   As a conventional pipe connection structure for connecting a resin pipe and a metal pipe, for example, as in Patent Document 1, a female side joint is provided at each end of a female side pipe (metal pipe) and a male side pipe (resin pipe). And what is provided with the male side joint is known. In this pipe connection structure, after inserting the male side joint into the female side joint, the resin pipe and the metal pipe are connected by attaching a quick fastener from the outside so as to cover the flanges of both the female side joint and the male side joint. To do.

特開２０１０−１５１３０５号公報JP 2010-151305 A

特許文献１の管接続構造の場合、２つの継手、バンドの他にクイックファスナーが必要となるため、部品点数が多くコスト増となる。また、クイックファスナーを取り付けるため、外径が必要以上に大きくならざるを得ず、接続部分が嵩張るため設置し難いという問題があった。
従って、本発明の目的は、部品点数が少なく簡便な構成であり、しかも接続部分が嵩張らないようにする継手部材、樹脂管、及び管接続構造を提供することにある。 In the case of the pipe connection structure of Patent Document 1, a quick fastener is required in addition to two joints and a band, which increases the number of parts and increases the cost. Moreover, since the quick fastener is attached, the outer diameter has to be larger than necessary, and there is a problem that it is difficult to install because the connecting portion is bulky.
Accordingly, an object of the present invention is to provide a joint member, a resin pipe, and a pipe connection structure that have a simple configuration with a small number of parts and that prevent a connecting portion from being bulky.

本発明に係る継手部材の第１特徴構成は、樹脂製の円筒部と、前記円筒部の外周面に配置されたシール部とを有し、樹脂管の端部に前記円筒部を外嵌した状態で、前記樹脂管を金属管に挿入したとき、前記金属管の内周面と前記樹脂管の外周面との間を密閉する点にある。   A first characteristic configuration of the joint member according to the present invention includes a resin-made cylindrical portion and a seal portion disposed on an outer peripheral surface of the cylindrical portion, and the cylindrical portion is externally fitted to an end portion of the resin pipe. In this state, when the resin tube is inserted into the metal tube, the space between the inner peripheral surface of the metal tube and the outer peripheral surface of the resin tube is sealed.

〔作用及び効果〕
本構成の継手部材のみを使用することによって、金属管の内周面と樹脂管の外周面との間を密閉することができるため、金属管と樹脂管とを接続する際の部品点数が少なくてすみ、しかも金属管と樹脂管との接続部分が嵩張ることもない。 [Action and effect]
By using only the joint member of this configuration, the space between the inner peripheral surface of the metal tube and the outer peripheral surface of the resin tube can be sealed, so the number of parts when connecting the metal tube and the resin tube is small. In addition, the connecting portion between the metal tube and the resin tube does not become bulky.

第２特徴構成は、前記円筒部の端面にテーパー面を設けてある点にある。   The second characteristic configuration is that a tapered surface is provided on an end surface of the cylindrical portion.

〔作用及び効果〕
本構成のごとく、継手部材の円筒部の端面にテーパー面を設けてあれば、よりコンパクト化されると共に、搬送等する際に円筒部の端部の破損も生じ難い。 [Action and effect]
If a tapered surface is provided on the end surface of the cylindrical portion of the joint member as in this configuration, the end portion of the cylindrical portion is less likely to be damaged when transported or the like.

本発明に係る樹脂管の第１特徴構成は、樹脂製の円筒部と前記円筒部の外周面に配置されたシール部とを有する継手部材が、端部外周に溶着されている点にある。   The 1st characteristic structure of the resin pipe which concerns on this invention exists in the point by which the joint member which has a cylindrical part made from resin and the seal part arrange | positioned at the outer peripheral surface of the said cylindrical part is welded by the edge part outer periphery.

〔作用及び効果〕
本構成の樹脂管を金属管に挿入しさえすれば、継手部材によって金属管の内周面と樹脂管の外周面との間を密閉することができるため、金属管と樹脂管とを接続する際の部品点数が少なくてすみ、しかも金属管と樹脂管との接続部分が嵩張ることもない。 [Action and effect]
As long as the resin tube having this configuration is inserted into the metal tube, the joint member can seal the space between the inner peripheral surface of the metal tube and the outer peripheral surface of the resin tube, so that the metal tube and the resin tube are connected. In this case, the number of parts can be reduced, and the connecting portion between the metal tube and the resin tube does not become bulky.

第２特徴構成は、前記継手部材の円筒部における少なくとも前記樹脂管の先端側の端面にテーパー面を設けてある点にある。   The second characteristic configuration is that a tapered surface is provided at least on the end surface on the distal end side of the resin pipe in the cylindrical portion of the joint member.

〔作用及び効果〕
本構成のごとく、継手部材の円筒部における少なくとも前記樹脂管の先端側の端面にテーパー面を設けてあれば、例えば、本構成の樹脂管を金属管に挿入する際に、テーパー面によって金属管がガイドされるため挿入し易い。 [Action and effect]
As in this configuration, if a tapered surface is provided at least on the end surface on the distal end side of the resin tube in the cylindrical portion of the joint member, for example, when the resin tube of this configuration is inserted into the metal tube, the metal tube is formed by the tapered surface. Is easy to insert.

第３特徴構成は、赤外線吸収剤を含んでおり、先端部に前記継手部材が溶着されている点にある。   3rd characteristic structure is the point which contains the infrared absorber and the said joint member is welded by the front-end | tip part.

〔作用及び効果〕
本構成のごとく、赤外線吸収剤を含むものであれば、赤外線レーザー溶着法によって、継手部材を簡便かつ確実に溶着することができる。 [Action and effect]
As long as it includes an infrared absorber as in this configuration, the joint member can be easily and reliably welded by the infrared laser welding method.

本発明に係る管接続構造の第１特徴構成は、樹脂管と、前記樹脂管を挿入可能な金属管と、樹脂製の円筒部と前記円筒部の外周面に配置されるシール部とを有する継手部材とを備え、前記継手部材が前記樹脂管の端部外周に溶着されており、前記樹脂管の端部が前記金属管の端部に挿入配置され、前記継手部材が前記金属管の内周面と前記樹脂管の外周面との間を密閉し、前記金属管の端部を前記継手部材の外径より縮径させてある点にある。   A first characteristic configuration of the pipe connection structure according to the present invention includes a resin pipe, a metal pipe into which the resin pipe can be inserted, a resin-made cylindrical portion, and a seal portion disposed on the outer peripheral surface of the cylindrical portion. A joint member, wherein the joint member is welded to the outer periphery of the end portion of the resin tube, the end portion of the resin tube is inserted into the end portion of the metal tube, and the joint member is disposed inside the metal tube. The space between the peripheral surface and the outer peripheral surface of the resin tube is sealed, and the end of the metal tube is reduced in diameter from the outer diameter of the joint member.

〔作用及び効果〕
本構成であれば、継手部材によって金属管の内周面と樹脂管の外周面との間を密閉することができるため、金属管と樹脂管とを接続する際の部品点数が少なくてすみ、しかも金属管と樹脂管との接続部分が嵩張ることもない。さらに金属管の端部を継手部材の外径より縮径させることによって樹脂管の抜け止めがなされるため、金属管と樹脂管とがより確実に接続される。 [Action and effect]
With this configuration, the joint member can seal between the inner peripheral surface of the metal tube and the outer peripheral surface of the resin tube, so the number of parts when connecting the metal tube and the resin tube can be reduced, Moreover, the connecting portion between the metal tube and the resin tube does not become bulky. Further, since the resin tube is prevented from coming off by reducing the end of the metal tube from the outer diameter of the joint member, the metal tube and the resin tube are more reliably connected.

第２特徴構成は、前記金属管の端部に拡径部を設け、前記金属管の非拡径部の内径と、前記樹脂管の内径とを略同じ大きさに設定し、前記継手部材の円筒部の先端側の端面にテーパー面を設け、前記樹脂管の端部が前記金属管の拡径部に挿入配置され、前記継手部材が前記拡径部の内周面と前記樹脂管の外周面との間を密閉し、前記継手部材の円筒部のテーパー面と、前記金属管の拡径部の立ち上り部分とを密着してある点にある。   In the second feature configuration, an enlarged diameter portion is provided at an end of the metal tube, the inner diameter of the non-expanded diameter portion of the metal tube and the inner diameter of the resin tube are set to substantially the same size, A tapered surface is provided on the end surface on the distal end side of the cylindrical portion, the end portion of the resin tube is inserted and disposed in the enlarged diameter portion of the metal tube, and the joint member is disposed on the inner circumferential surface of the enlarged diameter portion and the outer circumference of the resin tube. The surface is sealed, and the tapered surface of the cylindrical portion of the joint member and the rising portion of the enlarged diameter portion of the metal tube are in close contact with each other.

〔作用及び効果〕
本構成によれば、継手部材の円筒部のテーパー面と、金属管の拡径部の立ち上り部分とが密着することによって、円筒部のテーパー面がストッパーとして働くため、樹脂管がそれ以上金属管の中に進入することができず、金属管における樹脂管の位置が規制される。さらに本構成のごとく、金属管の非拡径部の内径と、樹脂管の内径とを同じ大きさに設定し、継手部材の円筒部のテーパー面と、金属管の拡径部の立ち上り部分とを密着させてあれば、流体が滞留し得るデッドスペースが生じ難い。また特に流体が金属管側から樹脂管側へと流れる場合、流体の圧力が樹脂管の端面に作用し難いため、樹脂管と金属管との接続状態がより安定して保持される。 [Action and effect]
According to this configuration, since the tapered surface of the cylindrical portion of the joint member and the rising portion of the enlarged diameter portion of the metal tube are in close contact with each other, the tapered surface of the cylindrical portion acts as a stopper. The position of the resin pipe in the metal pipe is restricted. Furthermore, as in this configuration, the inner diameter of the non-expanded portion of the metal tube and the inner diameter of the resin tube are set to the same size, the tapered surface of the cylindrical portion of the joint member, and the rising portion of the expanded portion of the metal tube, If it adheres, it is hard to produce the dead space in which the fluid can stay. In particular, when the fluid flows from the metal tube side to the resin tube side, the pressure of the fluid hardly acts on the end surface of the resin tube, so that the connection state between the resin tube and the metal tube is more stably maintained.

本発明に係る管接続構造の接続手順を示す図である。It is a figure which shows the connection procedure of the pipe connection structure which concerns on this invention. 本発明に係る管接続構造の別実施形態を示す図である。It is a figure which shows another embodiment of the pipe connection structure which concerns on this invention.

〔実施形態〕
以下、本発明の実施形態を図面に基づいて説明する。
図１に示すように、本発明の管接続構造は、継手部材１、樹脂管６、及び金属管７を備えて構成される。 Embodiment
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the pipe connection structure of the present invention includes a joint member 1, a resin pipe 6, and a metal pipe 7.

継手部材１は、樹脂製の円筒部２と、Ｏリング３（シール部）とを備え、円筒部２の外周面に形成された溝４の中にＯリング３が配置される。円筒部２に使用される樹脂の種類としては、特に限定されるものではないが、例えば、ポリエチレン樹脂、ナイロン樹脂、フッ素樹脂等の熱可塑性樹脂が好ましい。   The joint member 1 includes a resin cylindrical portion 2 and an O-ring 3 (seal portion), and the O-ring 3 is disposed in a groove 4 formed on the outer peripheral surface of the cylindrical portion 2. Although it does not specifically limit as a kind of resin used for the cylindrical part 2, For example, thermoplastic resins, such as a polyethylene resin, a nylon resin, a fluororesin, are preferable.

樹脂管６は、樹脂製の中空管である。当該樹脂管６に使用される樹脂の種類としては、特に限定されるものではないが、例えば、ポリエチレン樹脂、ナイロン樹脂、フッ素樹脂等の熱可塑性樹脂が好ましい。また、これらの熱可塑性樹脂が赤外線吸収剤を含むように構成しても良い。適用可能な赤外線吸収剤としては、例えば、カーボンブラック、フタロシアニン系、ジイモニウム系、アントラキノン系、アルミノシリケート、シリカ微粉末、カオリン系珪藻土が挙げられる。赤外線吸収剤は、樹脂１００質量部に対して、０．１〜２質量部で配合すると好適である。また、樹脂管６が複数の層からなる多層管である場合には、最外層のみが赤外線吸収剤を含むように構成しても良い。   The resin tube 6 is a resin hollow tube. Although it does not specifically limit as a kind of resin used for the said resin pipe | tube 6, For example, thermoplastic resins, such as a polyethylene resin, a nylon resin, and a fluororesin, are preferable. Moreover, you may comprise so that these thermoplastic resins may contain an infrared absorber. Applicable infrared absorbers include, for example, carbon black, phthalocyanine, diimonium, anthraquinone, aluminosilicate, silica fine powder, and kaolin diatomaceous earth. The infrared absorber is preferably blended at 0.1 to 2 parts by mass with respect to 100 parts by mass of the resin. Further, when the resin tube 6 is a multi-layer tube composed of a plurality of layers, only the outermost layer may be configured to contain an infrared absorber.

継手部材１は、樹脂管６の端部に外嵌固定される。固定方法としては、例えば、接着剤を使用したり、あるいは溶着させることで固定することができる。   The joint member 1 is externally fixed to the end of the resin pipe 6. As a fixing method, for example, an adhesive can be used or it can be fixed by welding.

特に樹脂管６及び継手部材１の円筒部２が熱可塑性樹脂で構成される場合、樹脂管６の外径を継手部材１の円筒部２の内径よりもわずかに大きく設定して、樹脂管６の端部を継手部材１の円筒部２の中に圧入した後に赤外線レーザー溶着法によって簡便且つ確実に溶着することができる。また、樹脂管６が赤外線吸収剤を含むものであれば、赤外線レーザー溶着法によってより簡便且つ確実に溶着することができる。   In particular, when the resin pipe 6 and the cylindrical portion 2 of the joint member 1 are made of thermoplastic resin, the outer diameter of the resin pipe 6 is set slightly larger than the inner diameter of the cylindrical portion 2 of the joint member 1, and the resin pipe 6 Can be easily and reliably welded by an infrared laser welding method. Moreover, if the resin tube 6 contains an infrared absorber, it can be more easily and reliably welded by an infrared laser welding method.

金属管７は、金属製の中空管である。当該金属管７に使用される金属の種類としては、特に限定されるものではないが、例えば、銅、ステンレス、アルミ等が挙げられる。   The metal tube 7 is a metal hollow tube. The type of metal used for the metal tube 7 is not particularly limited, and examples thereof include copper, stainless steel, and aluminum.

金属管７の端部には、拡径部８が形成されており、継手部材１を備えた樹脂管６が拡径部８内に挿入される。拡径部８は、樹脂管６を係止するために係止部分８ａ、継手部材１が内側に密着する密着部分８ｂ、樹脂管６を導入するための導入部分８ｃを備える。尚、本発明については、樹脂管６及び継手部材１を挿入して固定できるものであれば、特に拡径部８を有しない金属管７に適用することも可能である。   An enlarged diameter portion 8 is formed at the end of the metal tube 7, and the resin tube 6 provided with the joint member 1 is inserted into the enlarged diameter portion 8. The enlarged diameter portion 8 includes a locking portion 8 a for locking the resin tube 6, a close contact portion 8 b where the joint member 1 is in close contact with the inside, and an introduction portion 8 c for introducing the resin tube 6. In addition, about this invention, if the resin pipe 6 and the coupling member 1 can be inserted and fixed, it is also possible to apply to the metal pipe 7 which does not have the enlarged diameter part 8 especially.

係止部分８ａ（拡径部８の立ち上り部分）は、拡径部８の密着部分８ｂと金属管７の非拡径部９との間に形成され、密着部分８ｂから非拡径部９に向かうほど径が小さくなる。   The locking portion 8a (the rising portion of the expanded diameter portion 8) is formed between the close contact portion 8b of the expanded diameter portion 8 and the non-expanded diameter portion 9 of the metal tube 7, and from the close contact portion 8b to the non expanded diameter portion 9. The diameter decreases as it goes.

密着部分８ｂは、樹脂管６を接続する際に継手部材１を収容する円筒状の空間であって、その内径の大きさは、継手部材１の円筒部２の外径と略同じ大きさに設定される。   The contact portion 8b is a cylindrical space that accommodates the joint member 1 when the resin pipe 6 is connected, and the inner diameter thereof is approximately the same as the outer diameter of the cylindrical portion 2 of the joint member 1. Is set.

導入部分８ｃは、樹脂管６を金属管７の拡径部８に挿入するのを容易にするために形成したものである。導入部分８ｃの内径の大きさは、密着部分８ｂから開口端８ｄに向かうほど径が大きくなり、開口端８ｄの内径の大きさは、継手部材１の円筒部２の外径よりも大きく設定される。   The introduction portion 8 c is formed to facilitate the insertion of the resin tube 6 into the enlarged diameter portion 8 of the metal tube 7. The diameter of the inner diameter of the introduction portion 8c increases toward the opening end 8d from the contact portion 8b, and the inner diameter of the opening end 8d is set larger than the outer diameter of the cylindrical portion 2 of the joint member 1. The

次いで、上記構成の金属管７と樹脂管６との接続手順の一例を説明する。尚当該接続手順において使用する樹脂管６及び継手部材１の円筒部２は、熱可塑性樹脂で構成されるものとする。   Next, an example of a connection procedure between the metal pipe 7 and the resin pipe 6 having the above-described configuration will be described. The resin pipe 6 and the cylindrical portion 2 of the joint member 1 used in the connection procedure are assumed to be made of a thermoplastic resin.

まず、図１（ａ）に示すように、継手部材１の円筒部２の筒孔に、樹脂管６の端部を圧入して、赤外線レーザー溶着法で溶着する。   First, as shown to Fig.1 (a), the edge part of the resin pipe 6 is press-fit in the cylinder hole of the cylindrical part 2 of the coupling member 1, and it welds with an infrared laser welding method.

次いで、図１（ｂ）及び（ｃ）に示すように、円筒部２の溝４にＯリング３を装着した後、樹脂管６を拡径部８の導入部分８ｃに挿入して、継手部材１の円筒部２の先端が拡径部８の係止部分８ａに当接するまで樹脂管６を圧入する。このとき、拡径部８の係止部分８ａがストッパーとして働き、樹脂管６がそれ以上金属管７の中に進入することができず、樹脂管６の位置が規制される。   Next, as shown in FIGS. 1B and 1C, after mounting the O-ring 3 in the groove 4 of the cylindrical portion 2, the resin pipe 6 is inserted into the introduction portion 8 c of the enlarged diameter portion 8, and the joint member The resin tube 6 is press-fitted until the tip of one cylindrical portion 2 comes into contact with the locking portion 8 a of the enlarged diameter portion 8. At this time, the locking portion 8a of the enlarged diameter portion 8 functions as a stopper, the resin tube 6 cannot enter the metal tube 7 any more, and the position of the resin tube 6 is restricted.

継手部材１の円筒部２の先端が拡径部８の係止部分８ａに当接すると、円筒部２が拡径部８の密着部分８ｂの内周面に密着すると共に、Ｏリング３が拡径部８の密着部分８ｂの内周面に圧接する。これにより、金属管７の密着部分８ｂの内周面と、樹脂管６の端部の外周面との間が密閉される。   When the tip of the cylindrical portion 2 of the joint member 1 contacts the locking portion 8a of the enlarged diameter portion 8, the cylindrical portion 2 comes into close contact with the inner peripheral surface of the contact portion 8b of the enlarged diameter portion 8, and the O-ring 3 expands. It press-contacts with the internal peripheral surface of the contact part 8b of the diameter part 8. FIG. Thereby, the space between the inner peripheral surface of the close contact portion 8 b of the metal tube 7 and the outer peripheral surface of the end portion of the resin tube 6 is sealed.

最後に、図１（ｄ）に示すように、プレス装置１０によって、金属管７の拡径部８の端部（樹脂管６の継手部材１がその内側に配置していない部分）を加締めて抜け止めし、樹脂管６と金属管７とを接続する。   Finally, as shown in FIG.1 (d), the press apparatus 10 crimps the edge part of the enlarged diameter part 8 of the metal pipe 7 (the part which the coupling member 1 of the resin pipe 6 is not arrange | positioning inside). The resin pipe 6 and the metal pipe 7 are connected.

〔その他の実施形態〕
（１）図２に示すように、前述の実施形態において、金属管７の非拡径部９の内径ｄ１と、樹脂管６の内径ｄ２とを同じ大きさに設定し、継手部材１の円筒部２における樹脂管６の先端側の端面にテーパー面５を設けてもよい。尚、テーパー面５は必要に応じて円筒部２の他端にも設けるようにしても良い。
かかる構成であれば、樹脂管６の端部を金属管７の拡径部８に挿入して、継手部材１の円筒部２のテーパー面５が拡径部８の係止部分８ａに当接するまで樹脂管６を圧入したとき、継手部材１のテーパー面５と金属管７の拡径部８の係止部分８ａとが密着する。そのため、前述の実施形態と比べて、流体が滞留し得るデッドスペースが生じ難い。また特に流体が金属管７側から樹脂管６側へと流れる場合、流体の圧力が樹脂管６の端面に作用し難いため、前述の実施形態と比べて樹脂管６と金属管７との接続状態がより安定して保持される。
（２）上述の実施形態では、継手部材１を樹脂管６の先端に固定する構成を示しているが、当該構成に限定されるものではなく、樹脂管６の先端が継手部材１から少しはみ出ているような構成であっても良い。 [Other Embodiments]
(1) As shown in FIG. 2, in the above-described embodiment, the inner diameter d1 of the non-diameter portion 9 of the metal tube 7 and the inner diameter d2 of the resin tube 6 are set to the same size, and the cylinder of the joint member 1 A tapered surface 5 may be provided on the end surface of the resin tube 6 at the tip side of the portion 2. In addition, you may make it provide the taper surface 5 also in the other end of the cylindrical part 2 as needed.
With this configuration, the end portion of the resin tube 6 is inserted into the enlarged diameter portion 8 of the metal tube 7, and the tapered surface 5 of the cylindrical portion 2 of the joint member 1 comes into contact with the locking portion 8 a of the enlarged diameter portion 8. When the resin tube 6 is press-fitted until the taper surface 5 of the joint member 1 and the engaging portion 8a of the enlarged diameter portion 8 of the metal tube 7 are in close contact with each other. Therefore, compared with the above-mentioned embodiment, it is hard to produce the dead space where a fluid can stay. In particular, when the fluid flows from the metal tube 7 side to the resin tube 6 side, the pressure of the fluid is unlikely to act on the end surface of the resin tube 6, so that the connection between the resin tube 6 and the metal tube 7 is compared with the above-described embodiment. The state is held more stably.
(2) In the above-described embodiment, the configuration in which the joint member 1 is fixed to the tip of the resin pipe 6 is shown. However, the configuration is not limited to this configuration, and the tip of the resin tube 6 slightly protrudes from the joint member 1. It may be configured as shown.

密度０．９４のポリエチレン樹脂に１質量％のカーボンブラックを混練して樹脂管を作製した。また、密度０．９６５の高密度ポリエチレン棒を切削して継手部材の円筒部を作製した。この円筒部の内周面の端部に、その最大径が樹脂管の外径より少し大きめのテーパーを設け、そのテーパーを介して樹脂管を円筒部の筒孔に圧入した後、樹脂管を６０ｒｐｍの速度で回しながら、円筒部の外面側から波長９４０ｎｍ、出力６０Ｗの赤外線レーザーを２．５秒間照射して、円筒部を樹脂管の端部に溶着させた。   A resin tube was prepared by kneading 1% by mass of carbon black in a polyethylene resin having a density of 0.94. Moreover, the cylindrical part of the joint member was produced by cutting a high density polyethylene rod having a density of 0.965. A taper whose maximum diameter is slightly larger than the outer diameter of the resin tube is provided at the end of the inner peripheral surface of the cylindrical portion. After the resin tube is press-fitted into the cylindrical hole of the cylindrical portion through the taper, the resin tube is While rotating at a speed of 60 rpm, an infrared laser with a wavelength of 940 nm and an output of 60 W was irradiated from the outer surface side of the cylindrical portion for 2.5 seconds to weld the cylindrical portion to the end of the resin tube.

上記円筒部にセットされるＯリングがその内周面に密着するような内径を有する銅管を用意し、その端部以外をへら絞り加工によって内径が上記樹脂管の内径と略同径となるように縮径することによって金属管を作製した。このとき、この銅管の端部が拡径部となり、へら絞り加工によって縮径された部分が非拡径部となる。   A copper tube having an inner diameter is prepared so that an O-ring set in the cylindrical portion is in close contact with the inner peripheral surface, and the inner diameter becomes substantially the same as the inner diameter of the resin tube by spatula drawing except for the end portion. Thus, a metal tube was produced by reducing the diameter. At this time, the end portion of the copper tube becomes the enlarged diameter portion, and the portion reduced in diameter by the spatula drawing process becomes the non-expanded portion.

上記樹脂管の円筒部にＯリングを装着した後、この樹脂管を金属管の拡径部に挿入して、樹脂管の円筒部の先端が金属管の拡径部の係止部分に当接するまで樹脂管を圧入した。そして、プレス装置によって、金属管の拡径部の端部を加締めて抜け止めして樹脂管と金属管とを接続した。   After the O-ring is attached to the cylindrical portion of the resin tube, the resin tube is inserted into the enlarged diameter portion of the metal tube, and the tip of the cylindrical portion of the resin tube comes into contact with the engaging portion of the enlarged diameter portion of the metal tube. The resin tube was press-fitted until. Then, the end portion of the enlarged diameter portion of the metal tube was swaged by a press device to prevent the metal tube from coming off and the resin tube and the metal tube were connected.

本発明に係る管接続構造は、例えば、室外給湯器の内部配管等に用いることができる。   The pipe connection structure according to the present invention can be used, for example, for an internal pipe of an outdoor water heater.

１ 継手部材
２ 円筒部
３ Ｏリング（シール部）
４ 溝
５ テーパー面
６ 樹脂管
７ 金属管
８ 拡径部
８ａ 係止部分
８ｂ 密着部分
８ｃ 導入部分
８ｄ 開口端
９ 非拡径部
１０ プレス装置 1 Joint member 2 Cylindrical part 3 O-ring (seal part)
4 Groove 5 Tapered surface 6 Resin tube 7 Metal tube 8 Expanded portion 8a Locking portion 8b Adhering portion 8c Introducing portion 8d Open end 9 Non-diameter expanded portion 10 Press device

Claims (7)

樹脂製の円筒部と、前記円筒部の外周面に配置されたシール部とを有し、
樹脂管の端部に前記円筒部を外嵌した状態で、前記樹脂管を金属管に挿入したとき、前記金属管の内周面と前記樹脂管の外周面との間を密閉する継手部材。 A cylindrical portion made of resin, and a seal portion disposed on the outer peripheral surface of the cylindrical portion,
A joint member that seals between an inner peripheral surface of the metal tube and an outer peripheral surface of the resin tube when the resin tube is inserted into the metal tube in a state where the cylindrical portion is externally fitted to an end portion of the resin tube. 前記円筒部の端面にテーパー面を設けてある請求項１に記載の継手部材。   The joint member according to claim 1, wherein a tapered surface is provided on an end surface of the cylindrical portion. 樹脂製の円筒部と前記円筒部の外周面に配置されたシール部とを有する継手部材が、端部外周に溶着されている樹脂管。   A resin pipe in which a joint member having a cylindrical portion made of resin and a seal portion disposed on the outer peripheral surface of the cylindrical portion is welded to the outer periphery of the end portion. 前記継手部材の円筒部における少なくとも前記樹脂管の先端側の端面にテーパー面を設けてある請求項３に記載の樹脂管。   The resin pipe according to claim 3, wherein a tapered surface is provided on at least an end face on a distal end side of the resin pipe in the cylindrical portion of the joint member. 赤外線吸収剤を含んでおり、先端部に前記継手部材が溶着されている請求項３又は４に記載の樹脂管。   The resin pipe according to claim 3 or 4, comprising an infrared absorber, wherein the joint member is welded to a tip portion. 樹脂管と、
前記樹脂管を挿入可能な金属管と、
樹脂製の円筒部と前記円筒部の外周面に配置されるシール部とを有する継手部材とを備え、
前記継手部材が前記樹脂管の端部外周に溶着されており、
前記樹脂管の端部が前記金属管の端部に挿入配置され、前記継手部材が前記金属管の内周面と前記樹脂管の外周面との間を密閉し、
前記金属管の端部を前記継手部材の外径より縮径させてある管接続構造。 A resin tube,
A metal tube into which the resin tube can be inserted;
A joint member having a cylindrical portion made of resin and a seal portion disposed on the outer peripheral surface of the cylindrical portion;
The joint member is welded to the outer periphery of the end of the resin pipe;
The end of the resin tube is inserted and arranged at the end of the metal tube, and the joint member seals between the inner peripheral surface of the metal tube and the outer peripheral surface of the resin tube,
A pipe connection structure in which an end of the metal pipe is reduced in diameter from the outer diameter of the joint member. 前記金属管の端部に拡径部を設け、
前記金属管の非拡径部の内径と、前記樹脂管の内径とを略同じ大きさに設定し、
前記継手部材の円筒部の先端側の端面にテーパー面を設け、
前記樹脂管の端部が前記金属管の拡径部に挿入配置され、前記継手部材が前記拡径部の内周面と前記樹脂管の外周面との間を密閉し、
前記継手部材の円筒部のテーパー面と、前記金属管の拡径部の立ち上り部分とを密着してある請求項６に記載の管接続構造。 An enlarged diameter portion is provided at the end of the metal tube,
The inner diameter of the non-expanded portion of the metal tube and the inner diameter of the resin tube are set to approximately the same size,
A tapered surface is provided on the end surface on the distal end side of the cylindrical portion of the joint member,
An end portion of the resin tube is inserted and arranged in the enlarged diameter portion of the metal tube, and the joint member seals between an inner peripheral surface of the enlarged diameter portion and an outer peripheral surface of the resin tube,
The pipe connection structure according to claim 6, wherein the tapered surface of the cylindrical part of the joint member and the rising part of the enlarged diameter part of the metal pipe are in close contact with each other.
JP2010260062A 2010-11-22 2010-11-22 Joint member, resin pipe and pipe connecting structure Pending JP2012112411A (en)

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JP2015071870A (en) * 2013-10-02 2015-04-16 名工建設株式会社 Press-fitting pipe joint method and press-fitting pipe caulking device for use in the same
JP2017134163A (en) * 2016-01-26 2017-08-03 大日本印刷株式会社 Lens sheet, imaging module, and imaging apparatus

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JP2015071870A (en) * 2013-10-02 2015-04-16 名工建設株式会社 Press-fitting pipe joint method and press-fitting pipe caulking device for use in the same
JP2017134163A (en) * 2016-01-26 2017-08-03 大日本印刷株式会社 Lens sheet, imaging module, and imaging apparatus

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