JPH10292892A - Connecting method for metallic tube - Google Patents
Connecting method for metallic tubeInfo
- Publication number
- JPH10292892A JPH10292892A JP9100282A JP10028297A JPH10292892A JP H10292892 A JPH10292892 A JP H10292892A JP 9100282 A JP9100282 A JP 9100282A JP 10028297 A JP10028297 A JP 10028297A JP H10292892 A JPH10292892 A JP H10292892A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- joint
- metal tube
- metallic tube
- fusion
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/20—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics
- F16L47/24—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics for joints between metal and plastics pipes
-
- 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
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Pipe Accessories (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属管同士、ある
いは金属管と樹脂管などを容易に接続することが出来る
金属管の接続方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting metal pipes which can easily connect metal pipes or a metal pipe and a resin pipe.
【０００２】[0002]
【従来の技術】水道水、給湯の温水、ガスなどの流体を
流すために用いられる銅管やステンレス鋼管のような金
属管を接続する方法としては、ロウ付け、ネジ込み、あ
るいはカシメなどの方法が一般的である。また、簡易に
配管を接続する方法として、図４に示すような電気融着
方法が一般に用いられている。この方法は、樹脂管１
４、１４の接続に用いられており、内面に電熱線１３を
付設した樹脂製の融着部１２を有する融着継手１１に両
側から樹脂管１４を挿入し、電熱線１３の通電により融
着部１２の内周面と樹脂管１４の外周面を溶融させて、
両者を融着させる方法である。これに近いアイディアと
しては、金属管の表面に予め接着性樹脂をコーティング
しておき、このコーティング部と電気融着継手１１の融
着部１２を溶融一体化することにより接続する方法があ
る（特許公報第２５３０７６８号参照）。さらに、金属
管を簡単に接続する方法としては他に、筒状の形状記憶
合金部材を内蔵した管継手に金属管を挿入し、電熱線に
通電することで形状記憶合金部材を加熱し縮径させるこ
とで、管継手と金属管を接合する方法がある（実開平４
−９５３９１号公報参照）。2. Description of the Related Art As a method of connecting a metal pipe such as a copper pipe or a stainless steel pipe used for flowing a fluid such as tap water, hot water for hot water supply or gas, a method such as brazing, screwing or caulking is used. Is common. In addition, as a simple method of connecting pipes, an electric fusion method as shown in FIG. 4 is generally used. This method uses the resin tube 1
A resin tube 14 is inserted from both sides into a fusion joint 11 having a resin-made fusion portion 12 provided with a heating wire 13 on the inner surface, which is used for connection of the heating wires 4 and 14. By melting the inner peripheral surface of the part 12 and the outer peripheral surface of the resin pipe 14,
This is a method of fusing both. As an idea similar to this, there is a method in which an adhesive resin is coated on the surface of a metal tube in advance, and the coating portion and the fusion portion 12 of the electrofusion joint 11 are fused and integrated to connect (see Patent). Publication No. 2530768). Another method for easily connecting the metal pipe is to insert the metal pipe into a fitting having a tubular shape memory alloy member and heat the shape memory alloy member by energizing the heating wire to reduce the diameter. There is a method of joining the pipe joint and the metal pipe by
-95391).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述の
金属管を接続する方法には次のような問題があった。即
ち、 １）ロウ付けによる接続方法は、作業者の技術レベルに
よって接続部の品質がばらつき、不安定となる。また、
バーナー等の火気を使うため、火災等の事故にも注意を
要し、作業に危険性を伴う。 ２）機械的にネジ込みによる接続方法は、管に予めネジ
を切っておく必要がある。従って管長を現場合わせする
場合には、現場にてねじ切り作業をしなければならない
ため、作業性が悪くなる。また、カシメによる接続方法
も、接続部が狭い空間にある場合には、接続作業が困難
になり、作業性が悪くなる。 ３）電気融着方法を金属管の接続に用いると、通電加熱
により樹脂が溶融し、電熱線が動くことがあり、電熱線
と金属管が接触する恐れがある。接触すると、金属管は
導電性であるため、電熱線を絶縁被覆しておいても、短
絡による感電や過熱による火災の危険性が生ずる。な
お、一般に金属と樹脂を接着する場合、接着力を十分に
引き出すには金属を十分に加熱して表面に吸着されてい
るガス、水分等を飛ばす必要がある。しかし接着性樹脂
中に電熱線がある場合、熱の伝わる順番は電熱線、接着
性樹脂、金属管の順となる。一般に接着性樹脂の熱伝導
率は金属よりも遥かに小さいため、接着性樹脂から金属
管へはなかなか熱が伝わりにくく、またせっかく金属管
へ伝わった熱もすぐに管をつたって接続部から逃げてし
まう。よって金属管が十分に加熱される頃には接着性樹
脂は過熱によって劣化してしまい、長期的に接着力を保
持することは困難になってしまう。樹脂の過熱を防ぐた
め、継手への電源供給を過熱しないよう時間と共に変化
させる方法も考えられるが、専用の電源コントローラは
高価であり、しかも上記の理由により通電時間も長くな
るので実用的でない。 ４）形状記憶合金部材を用いる接続方法では、形状記憶
合金材料が高価であるため、コストが高くなる。However, the above-described method of connecting the metal tubes has the following problems. That is, 1) In the connection method by brazing, the quality of the connection portion varies depending on the technical level of the operator, and becomes unstable. Also,
Since fires such as burners are used, caution must be exercised for fires and other accidents, which entails risks. 2) The connection method by mechanical screwing requires that the pipe be pre-threaded. Therefore, when the pipe length is adjusted at the site, the threading operation must be performed at the site, resulting in poor workability. Also, in the connection method by caulking, when the connection portion is in a narrow space, the connection work becomes difficult, and the workability deteriorates. 3) When the electric fusion method is used to connect the metal tubes, the resin may be melted by the heating and the heating wire may move, and the heating wire may come into contact with the metal tube. Upon contact, the metal tube is conductive, so even if the heating wire is insulated, there is a risk of electric shock due to short-circuit and fire due to overheating. In general, when a metal is bonded to a resin, it is necessary to sufficiently heat the metal to remove gas, moisture, and the like adsorbed on the surface in order to sufficiently bring out the bonding strength. However, when a heating wire is present in the adhesive resin, the heat is transmitted in the order of the heating wire, the adhesive resin, and the metal tube. In general, since the thermal conductivity of adhesive resin is much lower than that of metal, it is difficult for heat to transfer from the adhesive resin to the metal tube, and the heat transmitted to the metal tube quickly escapes from the connection part through the tube. Would. Therefore, when the metal tube is sufficiently heated, the adhesive resin is deteriorated due to overheating, and it becomes difficult to maintain the adhesive force for a long time. In order to prevent overheating of the resin, a method of changing the power supply to the joint with time so as not to overheat is conceivable. However, a dedicated power controller is expensive, and for the above-mentioned reason, the energizing time becomes longer, which is not practical. 4) In the connection method using the shape memory alloy member, the cost is high because the shape memory alloy material is expensive.
【０００４】[0004]
【課題を解決するための手段】本発明は上記問題点を解
決すべくなされたもので、請求項１記載の発明は、金属
管の端末を、該金属管と接する部位の少なくとも一部に
金属に対して融着性を有する樹脂からなる融着部を設け
た継手本体を備えた筒状の継手内に挿入し、金属管の加
熱により前記融着部を溶かして金属管と継手本体とを融
着接続することを特徴とする金属管の接続方法である。Means for Solving the Problems The present invention has been made to solve the above problems, and the invention according to claim 1 has a structure in which an end of a metal tube is provided at least in part of a portion in contact with the metal tube. Inserted into a cylindrical joint having a joint body provided with a fusion portion made of a resin having a fusion property, and melting the fusion portion by heating the metal tube to form the metal tube and the joint body. This is a method for connecting metal tubes, which is characterized by performing fusion welding.
【０００５】請求項１記載の発明によれば、金属管を加
熱することによって金属管と金属に対して融着性を有す
る樹脂を融着し、これにより金属管を接続するため、金
属管の加熱は火気を用いるほどの高温にする必要はな
く、作業の危険性はない。また、加熱装置以外に特別な
工具を必要とせず、作業性がよい。また、従来の電気融
着継手のような継手本体に埋設された電熱線による加熱
を必要としないため、電気的な短絡による事故の問題も
なくなる。さらに、形状記憶合金材料のような高価な部
材も必要としないので、コストが低くなる。According to the first aspect of the present invention, the metal tube is heated to fuse the resin having the fusibility to the metal tube and the metal, thereby connecting the metal tube. The heating does not need to be as hot as using a fire, and there is no danger of work. Also, no special tool other than the heating device is required, and workability is good. Further, since there is no need for heating by a heating wire buried in the joint body such as a conventional electric fusion joint, there is no problem of an accident due to an electric short circuit. Further, since expensive members such as a shape memory alloy material are not required, the cost is reduced.
【０００６】また、請求項２記載の発明は、請求項１記
載の発明において、融着部は、無水マレイン酸、エポキ
シ基、アクリル酸、またはアルコキシシラン基をグラフ
トした高密度ポリエチレンを主体とした樹脂からなるこ
とを特徴とするものである。ここで、高密度ポリエチレ
ンを主体とした樹脂としては、高密度ポリエチレンに酸
化防止剤や低密度ポリエチレンなどを添加したものを挙
げることができる。According to a second aspect of the present invention, in the first aspect, the fused portion is mainly made of high-density polyethylene grafted with maleic anhydride, an epoxy group, acrylic acid, or an alkoxysilane group. It is characterized by being made of resin. Here, examples of the resin mainly composed of high-density polyethylene include those obtained by adding an antioxidant and low-density polyethylene to high-density polyethylene.
【０００７】上述のように、融着部を無水マレイン酸ま
たはエポキシ基などをグラフトした高密度ポリエチレン
を主体とした樹脂で構成すると、これらの樹脂は接着力
を十分に発揮できるほど高温に加熱してもある程度の粘
性を持っているので、継手内部の樹脂圧力が十分に上が
り、融着部と金属管との融着強度を十分に高くすること
ができる。As described above, if the fused portion is made of a resin mainly composed of high-density polyethylene grafted with maleic anhydride or an epoxy group or the like, these resins are heated to such a high temperature that they can sufficiently exhibit adhesive strength. However, since it has a certain degree of viscosity, the resin pressure inside the joint is sufficiently increased, and the fusion strength between the fusion joint and the metal pipe can be sufficiently increased.
【０００８】[0008]
【発明の実施の形態】以下、図１を用いて本発明の実施
の形態を詳細に説明する。図１において、継手１は金属
管５の外径にほぼ等しい内径を有する継手本体３の金属
管５に接する部位に、金属に対して融着性を有する樹脂
からなる融着部２を設けたものである。この継手１に金
属管５を挿入後、金属管５の継手１近傍を加熱装置７に
よって加熱する。この加熱を行うと、まず金属管５表面
に吸着されたガス、水分を飛ばすことができる。これは
金属管５表面の樹脂への接着性向上に寄与する。つい
で、金属管５からの熱伝導により融着部２が溶融し、金
属管５と継手１とを十分な強度で融着接合させることが
できる。なお、継手１は、融着部２と継手本体３を同一
材料で構成してもよい。Embodiments of the present invention will be described below in detail with reference to FIG. In FIG. 1, a joint 1 is provided with a fusion portion 2 made of a resin having a fusion property to a metal at a portion of the joint body 3 having an inner diameter substantially equal to the outer diameter of the metal tube 5 in contact with the metal tube 5. Things. After inserting the metal tube 5 into the joint 1, the vicinity of the joint 1 of the metal tube 5 is heated by the heating device 7. When this heating is performed, first, the gas and moisture adsorbed on the surface of the metal tube 5 can be blown off. This contributes to improving the adhesion of the surface of the metal tube 5 to the resin. Then, the fusion portion 2 is melted by heat conduction from the metal tube 5, and the metal tube 5 and the joint 1 can be fusion-bonded with sufficient strength. In the joint 1, the joint 2 and the joint body 3 may be made of the same material.
【０００９】融着部２を構成する材料としては、金属管
５と熱融着により強固に接着しうるものが好ましく、例
えば変成ポリオレフィン樹脂、ポリウレタン樹脂、ポリ
アミド樹脂、エポキシ樹脂などが挙げられる。但し、金
属管５の加熱によって容易に溶けだすような溶融粘度の
低い樹脂を用いると、溶融時に継手本体３の端部から溶
融樹脂が漏れ出してしまい、継手１内部の樹脂圧力が十
分に上がらなくなる恐れがある。従って、接着力を十分
に発揮できるほど高温に加熱してもある程度の粘性を持
っている樹脂が好ましく、例えば無水マレイン酸やエポ
キシ基等をグラフト重合した高密度ポリエチレンを主体
とした樹脂が好ましい。As a material constituting the fused portion 2, a material which can be firmly bonded to the metal tube 5 by heat fusion is preferable, and examples thereof include a modified polyolefin resin, a polyurethane resin, a polyamide resin, and an epoxy resin. However, if a resin having a low melt viscosity that is easily melted by heating the metal tube 5 is used, the molten resin leaks from the end of the joint body 3 at the time of melting, and the resin pressure inside the joint 1 is sufficiently increased. There is a risk of disappearing. Therefore, a resin having a certain degree of viscosity even when heated to a high temperature so that the adhesive force can be sufficiently exhibited is preferable. For example, a resin mainly composed of high-density polyethylene graft-polymerized with maleic anhydride or an epoxy group is preferable.
【００１０】また、継手本体３を構成する材料は融着部
２を構成する材料と同一でもよいが、融着部２を構成す
る材料よりも軟化点が十分に高いものにすると、金属管
５の加熱時に継手本体３が変形する恐れが少なくなり、
継手１内部の溶融樹脂圧力を高めることができ、融着強
度を高めることができるので、より好ましい。このよう
な軟化点の高い材料としては、例えば、架橋ポリオレフ
ィン系樹脂、ポリエーテルスルホン（ＰＥＳ）、ポリエ
ーテル・エーテルケトン（ＰＥＥＫ）、ポリフェニレン
サルファイド（ＰＰＳ）等の樹脂を挙げることができ
る。The material forming the joint body 3 may be the same as the material forming the fused portion 2. However, if the softening point is made sufficiently higher than the material forming the fused portion 2, the metal tube 5 The risk of deformation of the joint body 3 during heating of
It is more preferable because the pressure of the molten resin inside the joint 1 can be increased and the fusion strength can be increased. Examples of such a material having a high softening point include resins such as a crosslinked polyolefin resin, polyethersulfone (PES), polyetheretherketone (PEEK), and polyphenylenesulfide (PPS).
【００１１】[0011]
【実施例】以下、図面に基づいて本発明の実施例を詳細
に説明する。 （実施例１）図１において、継手本体３の内面に部分的
に設けた融着部２は接着性変成ポリオレフィンからな
り、継手本体３は３種類の樹脂、即ち、非架橋ポリオレ
フィン、架橋ポリオレフィン、ＰＰＳからなる３種類の
継手１を射出成形法で作製した。これらの継手１に金属
管５を挿入し、加熱装置７として電気ロウ付け機を用い
て、金属管５の継手１近傍を加熱して融着部２と融着接
合した。このようにして形成した金属管５の接続部につ
いて耐圧試験を行ったところ、継手本体３が架橋ポリオ
レフィンまたはＰＰＳからなる継手１は、９５℃の温水
中で１０気圧まで加圧してもリークは見い出されなかっ
た。また、継手本体３が非架橋ポリオレフィンからなる
継手１は、融着時の加熱により変形したが、常温水中で
加圧しても水漏れはなかった。なお、耐圧試験は次のよ
うに行った。まず、水温を９５℃に保った恒温水槽中に
水を充填した継手を一定時間放置して、継手の温度を一
様にした後、継手につないだホースを通して水を圧送す
る。そして継手内圧を１０気圧に保ち、１時間水漏れが
見られなければ、その継手は合格とする。Embodiments of the present invention will be described below in detail with reference to the drawings. (Example 1) In FIG. 1, a fused portion 2 partially provided on the inner surface of a joint body 3 is made of an adhesive modified polyolefin, and the joint body 3 is made of three kinds of resins, that is, a non-crosslinked polyolefin, a crosslinked polyolefin, Three types of joints 1 made of PPS were produced by an injection molding method. The metal tube 5 was inserted into these joints 1, and an electric brazing machine was used as the heating device 7 to heat the vicinity of the joint 1 of the metal tube 5 and fusion-bonded to the fusion portion 2. When a pressure resistance test was performed on the connection portion of the metal tube 5 formed in this manner, a leak was found in the joint 1 in which the joint body 3 was made of a crosslinked polyolefin or PPS even when pressurized to 10 atm in 95 ° C. hot water. Was not. Further, the joint 1 in which the joint body 3 was made of a non-crosslinked polyolefin was deformed by heating at the time of fusion, but did not leak even when pressurized in room temperature water. The pressure test was performed as follows. First, a joint filled with water is left in a constant temperature water tank maintained at a temperature of 95 ° C. for a certain period of time to make the temperature of the joint uniform, and then water is pumped through a hose connected to the joint. Then, the joint pressure is maintained at 10 atm, and if no water leakage is observed for one hour, the joint is judged to be acceptable.
【００１２】（実施例２）図１において、融着部２に熱
可塑性ポリウレタンを用い、継手本体３に架橋ポリオレ
フィンを用いた継手１を射出成形法で作製した。実施例
１と同様に、継手１と金属管５を融着接合し、耐圧試験
を行ったところ、９５℃の温水中で加圧してもリークは
見い出されなかった。なお、本実施例では、加熱により
継手１内部に融着部２を構成する熱可塑性ポリウレタン
のはみ出しが認められた。(Example 2) In FIG. 1, a joint 1 was prepared by injection molding using a thermoplastic polyurethane for a fused portion 2 and a crosslinked polyolefin for a joint body 3. Similarly to Example 1, the joint 1 and the metal tube 5 were fusion-bonded and subjected to a pressure resistance test. As a result, no leak was found even when pressure was applied in hot water at 95 ° C. In addition, in this example, the protrusion of the thermoplastic polyurethane constituting the fused portion 2 inside the joint 1 by heating was recognized.
【００１３】（実施例３）図２に示すように、継手本体
３は、無水マレイン酸で変成した高密度ポリエチレンか
らなり、融着部２を兼ねている。また、継手本体３の外
周は鉄板からなるカバー４で覆われている。本実施例の
継手１と金属管５を融着接合したところ、継手本体３の
外形がカバー４で固定されているため、融着部分の形状
変化はなく、また、実施例１、２と同様に耐圧試験を行
ったところ、リークは見い出されなかった。(Embodiment 3) As shown in FIG. 2, the joint body 3 is made of high-density polyethylene modified with maleic anhydride, and also serves as the fused portion 2. The outer periphery of the joint body 3 is covered with a cover 4 made of an iron plate. When the joint 1 and the metal pipe 5 of the present embodiment are fusion-bonded, the outer shape of the joint body 3 is fixed by the cover 4, so that the shape of the fusion-bonded portion does not change, and is the same as in the first and second embodiments. When a pressure resistance test was performed, no leak was found.
【００１４】（実施例４）図３に示すように、実施例２
と同一の樹脂材を用い、融着部２の両側に相当する位置
の継手本体３の外周に、放熱のためにフィン形状部３
ａ、３ｂを設けた。６は融着完了を検知するためのセン
サ穴で、センサ穴６からの溶融樹脂のはみ出しの目視、
溶融樹脂の圧力測定などにより融着の完了を検知する。
本実施例の継手１を金属管５に融着接合したところ、融
着部２からの樹脂の漏れ出しは継手本体３の内側に認め
られず、また、センサ穴６からの溶融樹脂のはみ出しに
より融着完了を容易に知ることができ、良好な融着状態
であった。ところで、継手１は金属管５からの熱伝導に
より加熱されると、熱膨張により広がろうとするが、継
手１端部が最も高温になるため、継手１の金属管５を挿
入する端部が広がってしまう。その結果、融着部２から
の溶融樹脂がセンサ穴６よりも先に継手１端部から漏れ
出し、継手１内の樹脂圧力が十分に上がらなくなる恐れ
がある。そこで、フィン形状部３ａを設けて継手１端部
を冷却すると、継手１は広がらなくなるので、継手１内
の溶融樹脂圧力を上げることができる。また、融着部２
よりも内側にフィン形状部３ｂを設けると、継手１内側
への樹脂漏れを防止することができる。(Embodiment 4) As shown in FIG.
The same resin material as above is used, and on the outer periphery of the joint body 3 at positions corresponding to both sides of the fused portion 2, fin-shaped portions 3
a, 3b. Reference numeral 6 denotes a sensor hole for detecting completion of fusion, and visual inspection of the protrusion of the molten resin from the sensor hole 6;
The completion of fusion is detected by measuring the pressure of the molten resin.
When the joint 1 of this embodiment was fusion-bonded to the metal tube 5, no leakage of the resin from the fusion portion 2 was observed inside the joint body 3, and the molten resin protruded from the sensor hole 6. The completion of the fusion could be easily known, and the fusion state was good. By the way, when the joint 1 is heated by the heat conduction from the metal tube 5, it tends to spread due to thermal expansion. However, since the end of the joint 1 has the highest temperature, the end of the joint 1 into which the metal tube 5 is inserted is Will spread. As a result, the molten resin from the fused portion 2 may leak from the end of the joint 1 before the sensor hole 6, and the resin pressure in the joint 1 may not be sufficiently increased. Therefore, when the fin-shaped portion 3a is provided and the end of the joint 1 is cooled, the joint 1 does not spread, so that the pressure of the molten resin in the joint 1 can be increased. In addition, the fusion part 2
When the fin-shaped portion 3b is provided further inside, resin leakage to the inside of the joint 1 can be prevented.
【００１５】なお、本発明は上記実施例に限定されず、
金属管に予めプライマなどの接着補助剤を塗布しておい
てもよい。さらに、金属管が銅製である場合には、銅害
による劣化を避けるために、継手を構成する樹脂に銅害
防止剤を添加しておくとよい。The present invention is not limited to the above embodiment,
An adhesion aid such as a primer may be applied to the metal tube in advance. Further, when the metal pipe is made of copper, it is preferable to add a copper damage inhibitor to the resin constituting the joint in order to avoid deterioration due to copper damage.
【００１６】[0016]
【発明の効果】本発明によれば、安全に、作業性よく、
かつ低いコストで金属管を接続することができるという
優れた効果がある。According to the present invention, safety, workability,
There is an excellent effect that the metal pipe can be connected at a low cost.
【図１】本発明に係る金属管の接続方法の一実施例の断
面説明図である。FIG. 1 is an explanatory sectional view of an embodiment of a method for connecting a metal tube according to the present invention.
【図２】他の実施例の断面説明図である。FIG. 2 is an explanatory cross-sectional view of another embodiment.
【図３】さらなる他の実施例の断面説明図である。FIG. 3 is an explanatory sectional view of still another embodiment.
【図４】従来の金属管の接続方法の断面説明図である。FIG. 4 is an explanatory sectional view of a conventional method for connecting a metal tube.
１ 継手 ２ 融着部 ３ 継手本体 ３ａ、３ｂ フィン形状部 ４ カバー ５ 金属管 ６ センサ穴 ７ 加熱装置 DESCRIPTION OF SYMBOLS 1 Joint 2 Fused part 3 Joint main body 3a, 3b Fin shape part 4 Cover 5 Metal pipe 6 Sensor hole 7 Heating device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西山 秀美 東京都千代田区丸の内２丁目６番１号 古 河電気工業株式会社内 ──────────────────────────────────────────────────続 き Continued from the front page (72) Inventor Hidemi Nishiyama 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd.
Claims (2)
の少なくとも一部に金属に対して融着性を有する樹脂か
らなる融着部を設けた継手本体を備えた筒状の継手内に
挿入し、金属管の加熱により前記融着部を溶かして金属
管と継手本体とを融着接続することを特徴とする金属管
の接続方法。1. A tubular joint having a joint body having a fusion tube made of a resin having a fusion property to a metal at least at a part of a portion in contact with the metal tube at an end of the metal tube. And fusing the welded portion by heating the metal tube to fuse and connect the metal tube and the joint body.
基、アクリル酸、またはアルコキシシラン基をグラフト
した高密度ポリエチレンを主体とした樹脂からなること
を特徴とする請求項１記載の金属管の接続方法。2. The metal tube according to claim 1, wherein the fusion portion is made of a resin mainly composed of high-density polyethylene grafted with maleic anhydride, epoxy group, acrylic acid or alkoxysilane group. Connection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9100282A JPH10292892A (en) | 1997-04-17 | 1997-04-17 | Connecting method for metallic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9100282A JPH10292892A (en) | 1997-04-17 | 1997-04-17 | Connecting method for metallic tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10292892A true JPH10292892A (en) | 1998-11-04 |
Family
ID=14269849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9100282A Pending JPH10292892A (en) | 1997-04-17 | 1997-04-17 | Connecting method for metallic tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10292892A (en) |
-
1997
- 1997-04-17 JP JP9100282A patent/JPH10292892A/en active Pending
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