JP2004020111A - Connecting structure of resin pipe to tank - Google Patents

Connecting structure of resin pipe to tank Download PDF

Info

Publication number
JP2004020111A
JP2004020111A JP2002177697A JP2002177697A JP2004020111A JP 2004020111 A JP2004020111 A JP 2004020111A JP 2002177697 A JP2002177697 A JP 2002177697A JP 2002177697 A JP2002177697 A JP 2002177697A JP 2004020111 A JP2004020111 A JP 2004020111A
Authority
JP
Japan
Prior art keywords
resin pipe
tank
connection
flange portion
pipe
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
JP2002177697A
Other languages
Japanese (ja)
Other versions
JP4143959B2 (en
Inventor
Takashi Igami
伊神　多加司
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.)
Toyo Radiator Co Ltd
Original Assignee
Toyo Radiator Co Ltd
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 Toyo Radiator Co Ltd filed Critical Toyo Radiator Co Ltd
Priority to JP2002177697A priority Critical patent/JP4143959B2/en
Publication of JP2004020111A publication Critical patent/JP2004020111A/en
Application granted granted Critical
Publication of JP4143959B2 publication Critical patent/JP4143959B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0256—Arrangements for coupling connectors with flow lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting structure permanently retaining calking parts even if a moment is applied on a resin pipe, in the connecting structure calking and fixing the tip of the resin pipe to a pipe fitting mouth of a metal tank via a short, cylindrical, and metal connecting cup. <P>SOLUTION: A calking suppression part 4b is integrally and projectively formed in the resin pipe 4 opposed to the rear end surface 3a of a flange part 3 of the resin pipe 4. The opposed distance between the calking suppression part 4b and the rear end surface 3a of the flange part 3 is adjusted to the band width of the calking part 8. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、熱交換器の金属製タンクに樹脂製パイプを接続する接続構造に関する。
【０００２】
【従来の技術】
金属製タンクと樹脂製パイプとの接続構造は、樹脂製タンクと金属製チューブプレートとの接続構造を利用することが考えられる。図５はその例で、金属製タンク１のパイプ取付口１ａに金属製段付カラー状の接続用カップ２の先端部を嵌着して、金属製タンク１，接続用カップ２間をろう付け固定する。接続用カップ２の外周に予めスリットを形成しておき、そのスリットより後端面にカシメ部８を設けておく。次に、樹脂製パイプ４は先端部外周にフランジ部３を有すると共に、そのフランジ部３よりさらに先端に環状溝１１を形成しておく。そして環状溝１１にＯリング１０を嵌着し、樹脂製パイプ４の先端部を接続用カップ２に嵌着する。次いで、カシメ部８を塑性変形することにより、樹脂製パイプ４を接続用カップ２に固定するものである。
【０００３】
【発明が解決しようとする課題】
ところがこのような金属製タンクと樹脂製パイプとの接続構造は、その樹脂製パイプ４にモーメントが加わると図６の如く、接続用カップ２のカシメ部８が変形して起き上がり、その締め付け力が弱くなって接続部に漏れが生じるおそれがある。
さらには、樹脂製パイプ４の先端部外周に環状溝１１を形成しているため、図７に示す如くそこにパーティングライン１５が形成される。即ち、樹脂製パイプ４の製造用の射出成形の金型において、樹脂製パイプ４の先端部を半径方向に分割する第１の金型１２と第２の金型１３を設ける必要がある。するとその環状溝１１にはパーティングライン１５が形成される。そのためそこにＯリング１０を被嵌すると、そのパーティングライン１５の僅かな凸部によって気密性が損なわれるおそれがある。
そこで本発明は、係る問題点を解決することを課題とする。
【０００４】
【課題を解決するための手段】
請求項１に記載の本発明は、円形なパイプ取付口（１ａ）を有する金属製タンク（１）　と、
そのパイプ取付口（１ａ）に液密に接合固定される短い筒状の金属製の接続用カップ（２）　と、
その接続用カップ（２）　に先端部が嵌入すると共に、その嵌入部に隣接する外周にフランジ部（３）　が一体に形成され、そのフランジ部（３）　の後端面（３ａ）で、前記接続用カップ（２）　にカシメ固定される樹脂製パイプ（４）　と、
を有する樹脂製パイプとタンクとの接続構造において、
前記接続用カップ（２）　は、その後端部に、周方向に沿ってスリット（１６）が形成されて、そのスリット（１６）と後端縁との間に帯状のカシメ部（８）　が形成され、
前記樹脂製パイプ（４）　には、前記フランジ部３の前記後端面（３ａ）に対向して、前記帯状のカシメ部（８）　の帯幅に整合する間隔で、カシメ抑え部（４ｂ）が一体に半径方向外方に突設され、
前記カシメ部（８）　が、樹脂製パイプ（４）　の軸線側に且つ軸線に平行に塑性変形されたことを特徴とする樹脂製パイプとタンクとの接続構造である。
【０００５】
請求項２に記載の本発明は、請求項１において、
前記接続用カップ（２）　は、前記パイプ取付口（１ａ）の開口直径より大なる直径の着座用フランジ部（５）　がその中間部外周に折り返し曲折されると共に、その着座用フランジ（５）　の先端側がそのパイプ取付口（１ａ）に挿入されるタンク挿入部（６）　を有し且つ、その先端縁に内フランジ部（７）　が曲折形成され、
前記樹脂製パイプ（４）　は、前記フランジ部（３）　の先端縁部に直径が段付に縮小するＯリング嵌着部（９）　が形成され、そのフランジ部（３）　の中間部および後端部が接続用カップ（２）　の内周に整合し、
そのＯリング嵌着部（９）　の外周と前記接続用カップ（２）　の内周面および前記内フランジ部（７）　とで囲まれたＯリング保持部（６ａ）にシール用のＯリング（１０）が圧入され、
前記樹脂パイプ（４）　の前記先端部のＯリング嵌着部（９）　の外周には、環状の溝が設けられないことを特徴とする樹脂製パイプとタンクとの接続構造である。
【０００６】
請求項３に記載の本発明は、請求項２において、
前記樹脂製パイプ（４）　の先端面（４ａ）が、前記接続用カップ（２）　の内フランジ部（７）　に着座された樹脂製パイプとタンクとの接続構造である。
【０００７】
【発明の実施の形態】
次に、図面に基づいて本発明の実施の形態につき説明する。
図１は本発明の樹脂製パイプとアルミニューム製タンクとの接続構造の分解斜視図であり、図２はその取り付け状態を示す縦断面図である。
この樹脂製パイプとタンクとの接続構造は、パイプ取付口１ａを有する金属製タンク１と、そのパイプ取付口１ａにろう付け等の手段により液密に固定されるアルミニューム製の接続用カップ２と、その接続用カップ２にＯリング１０を介して先端部が嵌着され、接続用カップ２のカシメ部８によってカシメ固定される樹脂製パイプ４とを有する。
【０００８】
接続用カップ２は、その先端部外周に着座用フランジ部５が折り返し曲折され、着座用フランジ部５の直径がパイプ取付口１ａの開口直径より大に形成されている。そして着座用フランジ部５の先端側にパイプ取付口１ａに整合するタンク挿入部６を有し且つ、その先端縁に内フランジ部７が曲折形成されている。着座用フランジ部５の後端部周縁には、カシメ部８が形成されている。このカシメ部８は、接続用カップ２の後端縁から逆Ｔ字状に形成されたスリット１６に隣接して設けられ、そのスリット１６によってその部分の塑性変形が容易になる構造を有する。このようにしてなる接続用カップ２は、予め金属製タンク１にろう付け接合される。このとき図２の如く、金属製タンク１とチューブプレート１７との間及びチューブプレート１７とチューブ１８との間並びに図示しないチューブ１８とフィンとの間が一体にろう付け固定される。
【０００９】
次に、樹脂製パイプ４はその先端部にフランジ部３が突設され、そのフランジ部３の先端縁部に直径が段付に縮小するＯリング嵌着部９が形成されている。フランジ部３の中間部及び後端部外周は接続用カップ２の内周に整合する。そしてＯリング嵌着部９の外周には、従来型樹脂製パイプのような環状の溝は設けられていない。
次に、フランジ部３の後端面３ａに対向しフランジ状のカシメ抑え部４ｂが一体に突設形成されている。この後端面３ａとカシメ抑え部４ｂの端面との間隔は、カシメ部８の幅に整合する。
【００１０】
このような樹脂製パイプ４を形成するには、図４に示す如く、そのパイプ接続用射出成形の金型において、先端部を除いて樹脂製パイプ４の外周に半径方向に分割する第１の金型１２と第２の金型１３を設け、樹脂製パイプ４の先端部には軸線方向に移動する金型１４を設ければよい。それにより、成形後の樹脂製パイプ４のＯリング嵌着部９にはパーティングラインが生じない。パーティングラインは、フランジ部３より後方のみである。
【００１１】
【取付方法】
そこで、樹脂製パイプ４のＯリング嵌着部９にＯリング１０が被嵌され、それらが接続用カップ２内に嵌着される。そして樹脂製パイプ４の先端面４ａを内フランジ部７に着座させ、カシメ部８を樹脂製パイプ４の軸線側に折り曲げることにより、そのカシメ部８の先端側の端縁をフランジ部３の後端面３ａに圧着すると共に、そのカシメ部８の後端側の端縁をカシメ抑え部４ｂの先端面に接触または近接させ、本接続構造を完成する。このように構成することにより、図２において樹脂製パイプ４にモーメントが加わっても、カシメ部８の幅方向両縁は後端面３ａとカシメ抑え部４ｂの端面との間に挟持されているため、起き上がりが防止されカシメ部８により締結力を保持し得る。
【００１２】
次に、図３は本発明の他の実施の形態を示し、この例が図２のそれと異なる点は、カシメ部８のみである。この例では、接続用カップ２の後端部に形成されたスリット１６がフランジ部３に整合する位置で直線状に形成され、それが定間隔に断続的に設けられ、そのスリット１６の上部側が樹脂製パイプ４の中心側に曲折され、そのカシメ部８の先端側縁部でフランジ部３の後端面３ａが被着され、後端側縁部がカシメ抑え部４ｂの先端縁に止着される。
【００１３】
【発明の作用・効果】
本発明の樹脂パイプとタンクとの接続構造は、樹脂製パイプ４のフランジ部３の後端面３ａに対向してカシメ抑え部４ｂが一体に突設され、その対向面間の間隔がカシメ部８の帯幅に整合するものである。従って、カシメ部８がフランジ部３の後端面３ａとカシメ抑え部４ｂの端面との間に挟持され、樹脂製パイプ４に外力が加わってもカシメ部８が不用意に変形することを防止し、信頼性の高い接続構造となり得る。
【００１４】
請求項２に記載の接続構造によれば、上記効果に加えてＯリング１０によるシールの信頼性を高めることができる。
請求項３に記載の本発明によれば、さらにシールの信頼性を高めることができる。
【図面の簡単な説明】
【図１】本発明の樹脂製パイプとタンクとの接続構造の分解斜視図。
【図２】同接続構造の縦断面図。
【図３】本発明の樹脂製パイプとタンクとの接続構造の他の実施の形態を示す要部斜視図。
【図４】同接続構造に用いられる樹脂製パイプ４の射出成形用金型の説明図。
【図５】従来型接続構造の縦断面図。
【図６】同構造の樹脂製パイプ４にモーメントが加えられた場合の説明図。
【図７】同接続構造に用いられた樹脂製パイプ４の射出成形用金型の説明図。
【符号の説明】
１　金属製タンク
１ａ　パイプ取付口
２　接続用カップ
３　フランジ部
３ａ　後端面
４　樹脂製パイプ
４ａ　先端面
４ｂ　カシメ抑え部
５　着座用フランジ部
６　タンク挿入部
６ａ　Ｏリング保持部
７　内フランジ部
８　カシメ部
９　Ｏリング嵌着部
１０　Ｏリング
１１　　環状溝
１２，１３，１４　金型
１５　パーティングライン
１６　　スリット
１７　　チューブプレート
１８　　チューブ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connection structure for connecting a resin pipe to a metal tank of a heat exchanger.
[0002]
[Prior art]
As the connection structure between the metal tank and the resin pipe, a connection structure between the resin tank and the metal tube plate may be used. FIG. 5 shows an example of this, in which the tip of a metal stepped collar-shaped connection cup 2 is fitted to the pipe mounting opening 1a of the metal tank 1 and the space between the metal tank 1 and the connection cup 2 is brazed. Fix it. A slit is formed in the outer periphery of the connection cup 2 in advance, and a caulking portion 8 is provided on a rear end surface of the slit. Next, the resin pipe 4 has the flange portion 3 on the outer periphery of the distal end portion, and the annular groove 11 is formed at the distal end further than the flange portion 3. Then, the O-ring 10 is fitted into the annular groove 11, and the tip of the resin pipe 4 is fitted into the connection cup 2. Then, the resin pipe 4 is fixed to the connection cup 2 by plastically deforming the caulking portion 8.
[0003]
[Problems to be solved by the invention]
However, in such a connection structure between the metal tank and the resin pipe, when a moment is applied to the resin pipe 4, the caulking portion 8 of the connection cup 2 is deformed and raised as shown in FIG. There is a possibility that the connection portion may be weakened and leak.
Further, since the annular groove 11 is formed on the outer periphery of the distal end of the resin pipe 4, the parting line 15 is formed there as shown in FIG. That is, in the injection molding die for manufacturing the resin pipe 4, it is necessary to provide the first die 12 and the second die 13 that divide the tip of the resin pipe 4 in the radial direction. Then, a parting line 15 is formed in the annular groove 11. Therefore, if the O-ring 10 is fitted thereon, the airtightness may be impaired by a slight projection of the parting line 15.
Then, this invention makes it a subject to solve such a problem.
[0004]
[Means for Solving the Problems]
The invention according to claim 1 comprises a metal tank (1) having a circular pipe fitting (1a);
A short cylindrical metal connection cup (2) which is liquid-tightly joined and fixed to the pipe mounting opening (1a);
The distal end portion is fitted into the connection cup (2), and a flange portion (3) is integrally formed on the outer periphery adjacent to the fitted portion, and the connection portion is formed on the rear end surface (3a) of the flange portion (3). A resin pipe (4) fixed to the cup (2) by caulking;
In the connection structure between the resin pipe and the tank having
The connection cup (2) has a slit (16) formed at its rear end along the circumferential direction, and a band-shaped caulked portion (8) is formed between the slit (16) and the rear end edge. And
The resin pipe (4) is provided with a caulking suppressing portion (4b) facing the rear end surface (3a) of the flange portion 3 at intervals matching the band width of the band-shaped caulking portion (8). Projecting outward in the radial direction,
A connection structure between a resin pipe and a tank, wherein the caulking portion (8) is plastically deformed on the axis side of the resin pipe (4) and parallel to the axis.
[0005]
The present invention described in claim 2 is based on claim 1,
The connection cup (2) has a seating flange portion (5) having a diameter larger than the opening diameter of the pipe mounting port (1a), and is folded back around the middle portion thereof, and the seating flange (5). Has a tank insertion portion (6) inserted into the pipe mounting opening (1a), and an inner flange portion (7) is bent at the front end edge thereof.
In the resin pipe (4), an O-ring fitting portion (9) whose diameter is reduced stepwise is formed at the leading edge of the flange portion (3), and an intermediate portion and a rear portion of the flange portion (3) are formed. The end is aligned with the inner circumference of the connection cup (2),
The O-ring holding portion (6a) surrounded by the outer periphery of the O-ring fitting portion (9), the inner peripheral surface of the connection cup (2) and the inner flange portion (7) has an O-ring for sealing ( 10) is press-fitted,
A connection structure between a resin pipe and a tank, wherein an annular groove is not provided on the outer periphery of the O-ring fitting portion (9) at the distal end of the resin pipe (4).
[0006]
The present invention described in claim 3 is the invention according to claim 2,
The distal end surface (4a) of the resin pipe (4) is a connection structure between the tank and the resin pipe seated on the inner flange portion (7) of the connection cup (2).
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of a connection structure between a resin pipe and an aluminum tank according to the present invention, and FIG. 2 is a longitudinal sectional view showing an attached state thereof.
The connection structure between the resin pipe and the tank includes a metal tank 1 having a pipe mounting port 1a, and an aluminum connection cup 2 fixed to the pipe mounting port 1a in a liquid-tight manner by brazing or the like. And a resin pipe 4 whose distal end is fitted to the connection cup 2 via an O-ring 10 and which is caulked and fixed by the caulking portion 8 of the connection cup 2.
[0008]
In the connection cup 2, the seating flange portion 5 is folded back and bent on the outer periphery of the distal end portion, and the diameter of the seating flange portion 5 is formed to be larger than the opening diameter of the pipe mounting port 1a. The seat insertion flange 6 has a tank insertion portion 6 at the tip end of the seating flange portion 5 that is aligned with the pipe mounting opening 1a, and the inner flange portion 7 is bent at the tip end edge. A caulking portion 8 is formed on the periphery of the rear end of the seating flange portion 5. The caulking portion 8 is provided adjacent to a slit 16 formed in an inverted T shape from the rear end edge of the connection cup 2, and has a structure in which the plastic deformation of the portion is facilitated by the slit 16. The connection cup 2 thus formed is brazed to the metal tank 1 in advance. At this time, as shown in FIG. 2, the space between the metal tank 1 and the tube plate 17, the space between the tube plate 17 and the tube 18, and the space between the tube 18 and the fin (not shown) are integrally brazed and fixed.
[0009]
Next, the resin pipe 4 has a flange portion 3 protruding from the distal end thereof, and an O-ring fitting portion 9 whose diameter is reduced stepwise at the distal end edge of the flange portion 3. The outer periphery of the intermediate portion and the rear end of the flange portion 3 is aligned with the inner periphery of the connection cup 2. The outer periphery of the O-ring fitting portion 9 is not provided with an annular groove like a conventional resin pipe.
Next, a flange-shaped crimp suppressing portion 4b is formed integrally with the rear end surface 3a of the flange portion 3 so as to protrude therefrom. The distance between the rear end face 3a and the end face of the caulking suppressing portion 4b matches the width of the caulking portion 8.
[0010]
In order to form such a resin pipe 4, as shown in FIG. 4, in the injection-molding die for pipe connection, a first part is formed by radially dividing the outer periphery of the resin pipe 4 except for the tip end. The mold 12 and the second mold 13 may be provided, and a mold 14 that moves in the axial direction may be provided at the tip of the resin pipe 4. As a result, no parting line is formed in the O-ring fitting portion 9 of the molded resin pipe 4. The parting line is only behind the flange 3.
[0011]
[Mounting method]
Then, the O-ring 10 is fitted to the O-ring fitting portion 9 of the resin pipe 4, and these are fitted into the connection cup 2. Then, the distal end surface 4a of the resin pipe 4 is seated on the inner flange portion 7 and the caulked portion 8 is bent toward the axis of the resin pipe 4 so that the edge on the distal end side of the caulked portion 8 is located behind the flange portion 3. The crimping portion 8 is pressed against the end surface 3a and the rear edge of the caulking portion 8 is brought into contact with or close to the front end surface of the caulking suppressing portion 4b to complete the present connection structure. With such a configuration, even if a moment is applied to the resin pipe 4 in FIG. 2, both edges in the width direction of the caulking portion 8 are sandwiched between the rear end surface 3a and the end surface of the caulking suppressing portion 4b. In this way, the rising is prevented, and the fastening force can be maintained by the caulking portion 8.
[0012]
Next, FIG. 3 shows another embodiment of the present invention. This example differs from that of FIG. In this example, a slit 16 formed at the rear end of the connection cup 2 is formed linearly at a position matching the flange portion 3 and is provided intermittently at regular intervals. It is bent toward the center of the resin pipe 4, the rear end face 3a of the flange 3 is attached to the front edge of the caulked portion 8, and the rear edge is fixed to the front edge of the caulking suppressing portion 4b. You.
[0013]
[Action and Effect of the Invention]
In the connection structure between the resin pipe and the tank according to the present invention, a caulking suppressing portion 4b is integrally provided so as to face the rear end surface 3a of the flange portion 3 of the resin pipe 4, and the space between the opposing surfaces is caulked portion 8 Is matched with the band width. Therefore, the caulking portion 8 is sandwiched between the rear end face 3a of the flange portion 3 and the end face of the caulking suppressing portion 4b, and prevents the caulking portion 8 from being carelessly deformed even when an external force is applied to the resin pipe 4. And a highly reliable connection structure.
[0014]
According to the connection structure of the second aspect, in addition to the above effects, the reliability of the seal by the O-ring 10 can be improved.
According to the present invention, the reliability of the seal can be further improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a connection structure between a resin pipe and a tank according to the present invention.
FIG. 2 is a longitudinal sectional view of the connection structure.
FIG. 3 is an essential part perspective view showing another embodiment of the connection structure between the resin pipe and the tank according to the present invention.
FIG. 4 is an explanatory view of a mold for injection molding of a resin pipe 4 used in the connection structure.
FIG. 5 is a longitudinal sectional view of a conventional connection structure.
FIG. 6 is an explanatory diagram when a moment is applied to the resin pipe 4 having the same structure.
FIG. 7 is an explanatory diagram of a mold for injection molding of a resin pipe 4 used in the connection structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Metal tank 1a Pipe mounting port 2 Connection cup 3 Flange part 3a Rear end face 4 Resin pipe 4a Front end face 4b Caulking suppressing part 5 Seating flange part 6 Tank insertion part 6a O-ring holding part 7 Inner flange part 8 Caulking part 9 O-ring fitting portion 10 O-ring 11 Annular grooves 12, 13, 14 Mold 15 Parting line 16 Slit 17 Tube plate 18 Tube

Claims (3)

円形なパイプ取付口（１ａ）を有する金属製タンク（１）　と、
そのパイプ取付口（１ａ）に液密に接合固定される短い筒状の金属製の接続用カップ（２）　と、
その接続用カップ（２）　に先端部が嵌入すると共に、その嵌入部に隣接する外周にフランジ部（３）　が一体に形成され、そのフランジ部（３）　の後端面（３ａ）で、前記接続用カップ（２）　にカシメ固定される樹脂製パイプ（４）　と、
を有する樹脂製パイプとタンクとの接続構造において、
前記接続用カップ（２）　は、その後端部に、周方向に沿ってスリット（１６）が形成されて、そのスリット（１６）と後端縁との間に帯状のカシメ部（８）　が形成され、
前記樹脂製パイプ（４）　には、前記フランジ部３の前記後端面（３ａ）に対向して、前記帯状のカシメ部（８）　の帯幅に整合する間隔で、カシメ抑え部（４ｂ）が一体に半径方向外方に突設され、
前記カシメ部（８）　が、樹脂製パイプ（４）　の軸線側に且つ軸線に平行に塑性変形されたことを特徴とする樹脂製パイプとタンクとの接続構造。A metal tank (1) having a circular pipe fitting (1a);
A short cylindrical metal connection cup (2) which is liquid-tightly joined and fixed to the pipe mounting opening (1a);
The distal end portion is fitted into the connection cup (2), and a flange portion (3) is integrally formed on the outer periphery adjacent to the fitted portion, and the connection portion is formed on the rear end surface (3a) of the flange portion (3). A resin pipe (4) fixed to the cup (2) by caulking;
In the connection structure between the resin pipe and the tank having
The connection cup (2) has a slit (16) formed at its rear end along the circumferential direction, and a band-shaped caulked portion (8) is formed between the slit (16) and the rear end edge. And
The resin pipe (4) has a crimp suppressing portion (4b) opposed to the rear end surface (3a) of the flange portion 3 at intervals matching the band width of the band-shaped crimp portion (8). Projecting outward in the radial direction,
A connection structure between a resin pipe and a tank, wherein the caulking portion (8) is plastically deformed on the axis side of the resin pipe (4) and parallel to the axis. 請求項１において、
前記接続用カップ（２）　は、前記パイプ取付口（１ａ）の開口直径より大なる直径の着座用フランジ部（５）　がその中間部外周に折り返し曲折されると共に、その着座用フランジ（５）　の先端側がそのパイプ取付口（１ａ）に挿入されるタンク挿入部（６）　を有し且つ、その先端縁に内フランジ部（７）　が曲折形成され、
前記樹脂製パイプ（４）　は、前記フランジ部（３）　の先端縁部に直径が段付に縮小するＯリング嵌着部（９）　が形成され、そのフランジ部（３）　の中間部および後端部が接続用カップ（２）　の内周に整合し、
そのＯリング嵌着部（９）　の外周と前記接続用カップ（２）　の内周面および前記内フランジ部（７）　とで囲まれたＯリング保持部（６ａ）にシール用のＯリング（１０）が圧入され、
前記樹脂パイプ（４）　の前記先端部のＯリング嵌着部（９）　の外周には、環状の溝が設けられないことを特徴とする樹脂製パイプとタンクとの接続構造。In claim 1,
The connection cup (2) has a seating flange portion (5) having a diameter larger than the opening diameter of the pipe mounting port (1a), and is folded back around the middle portion thereof, and the seating flange (5). Has a tank insertion portion (6) inserted into the pipe mounting opening (1a), and an inner flange portion (7) is bent at the front end edge thereof.
In the resin pipe (4), an O-ring fitting portion (9) whose diameter is reduced stepwise is formed at the leading edge of the flange portion (3), and an intermediate portion and a rear portion of the flange portion (3) are formed. The end is aligned with the inner circumference of the connection cup (2),
The O-ring holding portion (6a) surrounded by the outer periphery of the O-ring fitting portion (9), the inner peripheral surface of the connection cup (2) and the inner flange portion (7) has an O-ring for sealing ( 10) is press-fitted,
A connection structure between a resin pipe and a tank, wherein an annular groove is not provided on an outer periphery of the O-ring fitting portion (9) at the distal end of the resin pipe (4). 請求項２において、
前記樹脂製パイプ（４）　の先端面（４ａ）が、前記接続用カップ（２）　の内フランジ部（７）　に着座された樹脂製パイプとタンクとの接続構造。In claim 2,
A connection structure between a resin pipe and a tank, wherein a tip end surface (4a) of the resin pipe (4) is seated on an inner flange portion (7) of the connection cup (2).
JP2002177697A 2002-06-18 2002-06-18 Connection structure between resin pipe and tank Expired - Fee Related JP4143959B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002177697A JP4143959B2 (en) 2002-06-18 2002-06-18 Connection structure between resin pipe and tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002177697A JP4143959B2 (en) 2002-06-18 2002-06-18 Connection structure between resin pipe and tank

Publications (2)

Publication Number Publication Date
JP2004020111A true JP2004020111A (en) 2004-01-22
JP4143959B2 JP4143959B2 (en) 2008-09-03

Family

ID=31175660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002177697A Expired - Fee Related JP4143959B2 (en) 2002-06-18 2002-06-18 Connection structure between resin pipe and tank

Country Status (1)

Country Link
JP (1) JP4143959B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009264690A (en) * 2008-04-28 2009-11-12 Hitachi Appliances Inc Water heater
JP2010242851A (en) * 2009-04-06 2010-10-28 Bridgestone Corp Joint
JP2011524127A (en) * 2008-06-04 2011-08-25 トムソン ライセンシング Cell-dependent multi-group hybrid automatic repeat request method for multicast in wireless networks

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257788A (en) * 1988-08-23 1990-02-27 Benkan Corp Pipe joint for copper pipe
JPH0474790U (en) * 1990-10-31 1992-06-30
JPH0666392A (en) * 1992-08-21 1994-03-08 Nippondenso Co Ltd Pipe connecting device
US5465783A (en) * 1994-03-04 1995-11-14 Fedco Automotive Components Company, Inc. Sacrificial erosion bridge for a heat exchanger
JPH07310885A (en) * 1994-05-19 1995-11-28 Usui Internatl Ind Co Ltd Pipe end joining joint
JPH08159688A (en) * 1994-12-01 1996-06-21 Zexel Corp Port pipe mount structure to heat exchanger tank
JPH1089885A (en) * 1996-09-11 1998-04-10 Calsonic Corp Connecting section between metallic tank and metallic inlet pipe for heat exchanger
JPH11236985A (en) * 1998-02-23 1999-08-31 Denso Corp Connecting structure for pipe
JP2001280558A (en) * 2000-03-30 2001-10-10 Calsonic Kansei Corp Joint device for piping
JP2002206892A (en) * 2000-12-28 2002-07-26 Toyo Radiator Co Ltd Entrance pipe connection structure of heat exchanger
JP2003042376A (en) * 2001-07-31 2003-02-13 Toyo Radiator Co Ltd Connection structure for resin pipe and tank

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257788A (en) * 1988-08-23 1990-02-27 Benkan Corp Pipe joint for copper pipe
JPH0474790U (en) * 1990-10-31 1992-06-30
JPH0666392A (en) * 1992-08-21 1994-03-08 Nippondenso Co Ltd Pipe connecting device
US5465783A (en) * 1994-03-04 1995-11-14 Fedco Automotive Components Company, Inc. Sacrificial erosion bridge for a heat exchanger
JPH07310885A (en) * 1994-05-19 1995-11-28 Usui Internatl Ind Co Ltd Pipe end joining joint
JPH08159688A (en) * 1994-12-01 1996-06-21 Zexel Corp Port pipe mount structure to heat exchanger tank
JPH1089885A (en) * 1996-09-11 1998-04-10 Calsonic Corp Connecting section between metallic tank and metallic inlet pipe for heat exchanger
JPH11236985A (en) * 1998-02-23 1999-08-31 Denso Corp Connecting structure for pipe
JP2001280558A (en) * 2000-03-30 2001-10-10 Calsonic Kansei Corp Joint device for piping
JP2002206892A (en) * 2000-12-28 2002-07-26 Toyo Radiator Co Ltd Entrance pipe connection structure of heat exchanger
JP2003042376A (en) * 2001-07-31 2003-02-13 Toyo Radiator Co Ltd Connection structure for resin pipe and tank

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009264690A (en) * 2008-04-28 2009-11-12 Hitachi Appliances Inc Water heater
JP2011524127A (en) * 2008-06-04 2011-08-25 トムソン ライセンシング Cell-dependent multi-group hybrid automatic repeat request method for multicast in wireless networks
JP2010242851A (en) * 2009-04-06 2010-10-28 Bridgestone Corp Joint

Also Published As

Publication number Publication date
JP4143959B2 (en) 2008-09-03

Similar Documents

Publication Publication Date Title
US7150478B2 (en) Integrated seal for tube to hose connection
EP1423636B1 (en) Pre-assembled sealing connection
JP2000046259A (en) Piping coupling and manufacture thereof
JP2004020111A (en) Connecting structure of resin pipe to tank
JP5271747B2 (en) Waterproof connector
JP2004190887A (en) Nozzle cap
JP4713025B2 (en) Connection structure between resin pipe and tank
JPH11223163A (en) Resin member connection structure
EP2369213B1 (en) Quick connector with snapable hose into a coupling, hose connecting process thereof
JP4588933B2 (en) Connection structure between resin pipe and tank
JP5750215B2 (en) Male joints for fastener joints and fastener joints
JP2886774B2 (en) Connector waterproof plug
JP4588932B2 (en) Connection structure between resin pipe and tank
JPH11344183A (en) Tube connecting structural body
JP2004169829A (en) Piping joint structure
JPH11236985A (en) Connecting structure for pipe
JP3035194B2 (en) Constant velocity joint and method of assembling the same
JP2003278974A (en) Metal fitting for hose
JP4220211B2 (en) Piping connector
JP2007331462A (en) Heat insulation board fixing boss and heat insulation board fixing structure
JPH0666392A (en) Pipe connecting device
JP2002206892A (en) Entrance pipe connection structure of heat exchanger
JPH08270873A (en) Electric fusion joint
JP2003297625A (en) Coil device
JP2541313Y2 (en) Hole plug

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050526

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080520

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080603

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080605

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110627

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees