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JP3818977B2 - Pipe joint structure - Google Patents

Pipe joint structure Download PDF

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Publication number
JP3818977B2
JP3818977B2 JP2003112283A JP2003112283A JP3818977B2 JP 3818977 B2 JP3818977 B2 JP 3818977B2 JP 2003112283 A JP2003112283 A JP 2003112283A JP 2003112283 A JP2003112283 A JP 2003112283A JP 3818977 B2 JP3818977 B2 JP 3818977B2
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JP
Japan
Prior art keywords
side structure
female
male
metal pipe
outer flange
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.)
Expired - Fee Related
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JP2003112283A
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Japanese (ja)
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JP2004316786A (en
Inventor
勝 福田
正幸 井手
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.)
Kyowa Sangyo Co Ltd
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Kyowa Sangyo Co Ltd
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Priority to JP2003112283A priority Critical patent/JP3818977B2/en
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Description

【０００１】
【発明の属する技術分野】
本発明は、管継手構造に関する。
【０００２】
【従来の技術】
従来の管継手の雌側構造体25は、図８に示すように、銅製のパイプ26の端部27に、パイプ26とは異なる材質の補強部材28を外嵌状に固着したもの（従来例１とする）が公知である。構成部材の材質は、例えば、パイプ26が銅から成り、補強部材28がステンレス、黄銅等から成るものであった。この管継手の雌側構造体25の製法は、パイプ26の端部27に補強部材28を圧着（密嵌）する方法である。
【０００３】
また、その他の従来の管継手の雌側構造体としては、パイプの端部に雄側構造体との接続用ブロック体を有するものが公知である（従来例２とする）。この雌側構造体の製法は、パイプの先端にブロック体を溶接（ろう付け）する方法である。（例えば、特許文献１参照。）
【０００４】
【特許文献１】
特開２００２−２２０７４号公報
【０００５】
【発明が解決しようとする課題】
しかし、従来例１の管継手の雌側構造体は、異なる２種類の材質の部材から成るので、製造する際手間がかかるとともに、廃棄する際リサイクル性が悪かった。また、従来例２の管継手の雌側構造体は、パイプにブロック体を溶接する（ろう付けする）ので、製造する際手間がかかっていた。
【０００６】
そこで、本発明は、容易に製造することができる管継手構造を提供することを目的とする。また、リサイクル性の良い管継手構造を提供することを他の目的とする。
【０００７】
【課題を解決するための手段】
上述の目的を達成するために、本発明に係る管継手構造は、雌側構造体と、該雌側構造体に挿入される雄側構造体と、該雌側構造体及び該雄側構造体に径方向から弾発的かつ外嵌状に付設されて該雌側構造体と該雄側構造体とを相互に接続する接続部材と、を備えた管継手構造であって、上記雌側構造体は、上記雄側構造体が挿入される大径短円筒部と、該大径短円筒部の最外端に形成されるカール状外フランジ部と、を有し、かつ、該大径短円筒部と該カール状外フランジ部とは、雌側の金属パイプの端部に塑性加工にて、該雌側の金属パイプと一体に成型され、上記雄側構造体は、雄側の金属パイプの最先端に塑性加工にて突出状に形成された外フランジ部と、該雄側の金属パイプの外周面に外嵌されて該外フランジ部から小寸法だけ内側に設けられたリング体と、該外フランジ部と該リング体との間に形成された凹周溝に嵌着されるシール材と、を有し、上記リング体は、上記雄側の金属パイプに外径方向に塑性加工にて形成された小鍔部にて固着され、上記接続部材は、上記雌側構造体の上記カール状外フランジ部と部分的に嵌合する長孔と、該長孔の一側に設けられると共に該雌側構造体の上記大径短円筒部の外面に沿う大径円弧部と、該長孔の他側に設けられると共に上記雄側の金属パイプの外面に沿う小径円弧部と、を備えたものである。
【０００８】
【発明の実施の形態】
以下、実施の形態を示す図面に基づき、本発明を詳説する。
【０００９】
図１・図２は、本発明の実施の一形態の使用状態を示し、雌側構造体Ａは、雄側構造体Ｂと接続されて、管継手を構成し、この管継手は、例えば、ガス給湯器やオイル給湯器（図示省略）に接続され、内部に水や湯が流される。水や湯の圧力は、大気圧を１気圧とすると、例えば、最大約３気圧となる。
【００１０】
本発明に係る管継手の雌側構造体Ａは、銅，アルミニウム，ステンレス鋼（鉄鋼）等の金属パイプ１の端部２に塑性加工にて、カール状外フランジ部３と、シール材Ｓ（例えば、Ｏリング）を嵌着した雄側先端部Ｂ0 が挿入される大径短円筒部４とが、金属パイプ１と一体に成型されている。つまり、金属パイプ１の本体の外径よりも大径の短円筒部４がテーパ部４ｃをもって連続状に形成されると共に、この短円筒部４の最外端にカール状外フランジ部３が連設されている。
【００１１】
図１〜図３に示すように、Ｋは雌側構造体Ａと雄側構造体Ｂを接続する接続部材を示す。Ｋは、雌側構造体Ａの外フランジ部３が部分的に嵌合する正面視縦方向の長孔Ｋ0 ，Ｋ0 を有する。長孔Ｋ0 の一側（図１の左側）に雌側構造体Ａの大径短円筒部４の外面４ａに沿う大径円弧部Ｅ1 が形成される。長孔Ｋ0 の他側（図１の右側）に雄側構造体Ｂの外面Ｂ1 ───雄側の金属パイプ１ａの外面───に沿う小径円弧部Ｅ2 が形成される。
【００１２】
次に、雄側構造体Ｂについて説明すると、図２と図４に於て、金属パイプ１ａの最先端に塑性加工にて外フランジ部６を突出状に形成し、かつ、この外フランジ部６から小寸法Ｚだけ内側に、機械加工等で作製した横断面略矩形状のリング体８を、設けて、Ｏリング等のシール材Ｓを嵌着する凹周溝７を形成する。図例では、上記リング体８の内周面に係止用小凹溝を形成し、金属パイプ１ａの外周面に、このリング体８を外嵌した状態で、金属パイプ１ａを外径方向に小鍔部を塑性加工で形成して、このリング体８を固着している。
なお、本発明に於ては、この雄側構造体Ｂは、これ以外に、その構成は自由である。
【００１３】
雌側構造体Ａと雄側構造体Ｂの接続方法を説明する。
図４は、雌側構造体Ａと雄側構造体Ｂを接続する以前の状態を示す。あらかじめ雄側構造体Ｂ（の雄側先端部Ｂ0 ）にシール材Ｓを外嵌したものを雌側構造体Ａに矢印Ｙ方向へ挿入する。その後、図１・図２に示したように、接続部材Ｋを、雌側構造体Ａと雄側構造体Ｂに弾発的に外嵌状に付設する。すなわち、接続部材Ｋにて、雌側構造体Ａと雄側構造体Ｂが離脱しないように接続する。このとき、接続部材Ｋの長孔Ｋ0 に、雌側構造体Ａの外フランジ部３が部分的に嵌合する。
【００１４】
次に、管継手の雌側構造体の製法について説明する。
図５〜図７に示すように、管継手の雌側構造体Ａの製法は、雌金型Ｍ1 （上型）と雄金型Ｍ2 （下型）を相互に接近方向に作動させて金属パイプ１の端部２を塑性加工して管継手の雌側構造体Ａを成型する。
【００１５】
具体的には、まず、図５に示すように、雌金型Ｍ1 にて金属パイプ１を掴持する。その後、雌金型Ｍ1 と雄金型Ｍ2 を相互に接近方向に作動させる。そして、図６と図７に順次示すように、雄金型Ｍ2 の拡径短柱部Ｔにてシール材密嵌用大径短円筒部４を形成する（拡管加工）と共に直ちに───すなわち、連続的に───雄金型Ｍ2 のカール形成凹部Ｃにて、金属パイプ１の端部２にカール状外フランジ部３を形成する（カーリング加工）。図例では、カール形成凹部Ｃは、拡径短柱部Ｔの基部の外周に沿って、断面が小円弧状に上方開口状に形成されている。なお、「雌金型Ｍ1 と雄金型Ｍ2 を相互に接近方向に作動させる」とは、雌金型Ｍ1 と雄金型Ｍ2 の両方を相互に接近方向に作動させる場合と、雌金型Ｍ1 又は雄金型Ｍ2 のうち一方を他方へ接近方向に作動させる場合をいうものと定義する。
【００１６】
なお、雌金型Ｍ1 を下型とし、雄金型Ｍ2 を上型としても良い。
【００１７】
【発明の効果】
本発明は、上述の如く構成されるので、次に記載する効果を奏する。
【００１８】
雌側構造体Ａは、金属パイプ１の端部２に塑性加工にて、カール状外フランジ部３と大径短円筒部４とが金属パイプ１と一体に成型されたものなので、部品点数が最少となって、容易に製造することができる。特に、ろう付けが不要となり、コスト低減にも寄与できる発明である。また、雌側構造体Ａは、一種類の材質から成るのでリサイクル性が良い。
【図面の簡単な説明】
【図１】 本発明の実施の一形態の使用状態を示す正面図である。
【図２】 使用状態（接続状態）を示す断面正面図である。
【図３】 接続部材を示す側面図である。
【図４】 接続前の状態を示す説明用の断面正面図である。
【図５】 製造方法説明用断面正面図である。
【図６】 製造方法説明用断面正面図である。
【図７】 製造方法説明用断面正面図である。
【図８】 従来例を示す断面正面図である。
【符号の説明】
１，１ａ 金属パイプ
２ 端部
３ （カール状）外フランジ部
４ 大径短円筒部
４ａ 外面
６ 外フランジ部
７ 凹周溝
８ リング体
Ａ 雌側構造体
Ｂ 雄側構造体
Ｂ0 雄側先端部
Ｂ 1 外面
Ｅ 1 大径円弧部
Ｅ 2 小径円弧部
Ｋ 接続部材
Ｋ 0 長孔
Ｓ シール材 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to KanTsugi hand structure.
[0002]
[Prior art]
As shown in FIG. 8, a conventional female joint structure 25 of a pipe joint is formed by fixing a reinforcing member 28 made of a material different from the pipe 26 to an end 27 of a copper pipe 26 (conventional example). 1) is known. As for the material of the constituent member, for example, the pipe 26 is made of copper, and the reinforcing member 28 is made of stainless steel, brass or the like. The manufacturing method of the female side structure 25 of the pipe joint is a method in which a reinforcing member 28 is pressure-bonded (tightly fitted) to the end portion 27 of the pipe 26.
[0003]
As another female side structure of a conventional pipe joint, one having a connecting block body for connection with a male side structure at the end of a pipe is known (conventional example 2). This method of manufacturing the female side structure is a method of welding (brazing) a block body to the tip of a pipe. (For example, see Patent Document 1.)
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-22074
[Problems to be solved by the invention]
However, since the female side structure of the pipe joint of Conventional Example 1 is made of two different types of materials, it takes time to manufacture and the recyclability is poor when discarded. Moreover, since the female side structure of the pipe joint of the prior art example 2 welds (brazes) the block body to the pipe, it takes time and effort to manufacture.
[0006]
The present invention aims at providing a KanTsugi hand structure can be easily manufactured. Further, to provide a recycling property good KanTsugi hand structure with another object.
[0007]
[Means for Solving the Problems]
To achieve the above object, KanTsugi hand structure according to the present invention, a female structure, the male-side structure that is inserted into the female-side structure, the female-side structure and the male-side structure A pipe joint structure comprising a connecting member that is elastically and externally attached to a body and that connects the female side structure and the male side structure to each other. The structure has a large-diameter short cylindrical portion into which the male-side structure is inserted, and a curled outer flange portion formed at the outermost end of the large-diameter short cylindrical portion, and the large-diameter the short cylindrical portion and the curled outer flange at plastic working end of the female side of the metal pipe is molded into a metal pipe integral with the female side, the male side structure, the male metal An outer flange part formed in a protruding shape by plastic working at the forefront of the pipe, and fitted on the outer peripheral surface of the metal pipe on the male side, and within a small dimension from the outer flange part And a seal member fitted in a concave groove formed between the outer flange portion and the ring body, and the ring body is the metal pipe on the male side The connecting member is fixed to a small flange portion formed by plastic working in the outer diameter direction, and the connection member includes a long hole that partially fits with the curled outer flange portion of the female structure, A large-diameter arc portion provided on one side of the hole and along the outer surface of the large-diameter short cylindrical portion of the female-side structure, and provided on the other side of the long hole and along the outer surface of the male-side metal pipe A small-diameter arc portion .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
[0009]
FIGS. 1 and 2 show a use state of an embodiment of the present invention. A female side structure A is connected to a male side structure B to form a pipe joint. It is connected to a gas water heater or an oil water heater (not shown), and water or hot water flows inside. The pressure of water or hot water is, for example, a maximum of about 3 atm when the atmospheric pressure is 1 atm.
[0010]
A female side structure A of a pipe joint according to the present invention is formed by plastic working an end 2 of a metal pipe 1 such as copper, aluminum, stainless steel (steel) or the like, and a curled outer flange 3 and a sealing material S ( For example, a large-diameter short cylindrical portion 4 into which a male front end portion B 0 fitted with an O-ring is inserted is formed integrally with the metal pipe 1. That is, the short cylindrical portion 4 having a diameter larger than the outer diameter of the main body of the metal pipe 1 is continuously formed with the tapered portion 4c, and the curled outer flange portion 3 is connected to the outermost end of the short cylindrical portion 4. It is installed.
[0011]
As shown in FIGS. 1-3, K shows the connection member which connects the female side structure A and the male side structure B. As shown in FIG. K has long holes K 0 , K 0 in the longitudinal direction in front view in which the outer flange portion 3 of the female side structure A is partially fitted. A large-diameter arc portion E 1 is formed on one side (left side in FIG. 1) of the long hole K 0 along the outer surface 4a of the large-diameter short cylindrical portion 4 of the female-side structure A. Other small-diameter arcuate portion E 2 along the outer surface ─── metal pipes 1a of the outer surface B 1 ─── male side of the male structure B (right side in FIG. 1) of the long hole K 0 is formed.
[0012]
Next, the male side structure B will be described. In FIGS. 2 and 4, the outer flange portion 6 is formed in a protruding shape by plastic working at the forefront of the metal pipe 1a, and the outer flange portion 6 is formed. A ring body 8 having a substantially rectangular cross section produced by machining or the like is provided on the inner side from the small dimension Z to form a concave groove 7 into which a sealing material S such as an O-ring is fitted. In the illustrated example, a small concave groove for locking is formed on the inner peripheral surface of the ring body 8, and the metal pipe 1a is extended in the outer diameter direction in a state where the ring body 8 is fitted on the outer peripheral surface of the metal pipe 1a. The small flange portion is formed by plastic working, and the ring body 8 is fixed.
In the present invention, the male side structure B can have any other configuration.
[0013]
A method for connecting the female side structure A and the male side structure B will be described.
FIG. 4 shows a state before the female side structure A and the male side structure B are connected. A member in which the sealing material S is externally fitted to the male side structure B (the male side tip B 0 ) in advance is inserted into the female side structure A in the direction of the arrow Y. Thereafter, as shown in FIGS. 1 and 2, the connecting member K is elastically attached to the female side structure A and the male side structure B in an outer fitting manner. That is, the connection member K is connected so that the female side structure A and the male side structure B are not detached. At this time, the outer flange portion 3 of the female-side structure A is partially fitted into the long hole K 0 of the connecting member K.
[0014]
Next, the manufacturing method of the female side structure of a pipe joint is demonstrated.
As shown in FIGS. 5 to 7, the female side structure A of the pipe joint is manufactured by operating the female mold M 1 (upper mold) and the male mold M 2 (lower mold) in the approaching direction. The end portion 2 of the metal pipe 1 is plastically processed to mold the female side structure A of the pipe joint.
[0015]
Specifically, first, as shown in FIG. 5, to grip the metal pipe 1 at female mold M 1. Thereafter, the female mold M 1 and the male mold M 2 are operated in the approaching direction. Then, as shown in FIGS. 6 and 7 in sequence, the large diameter short cylindrical portion 4 for tight fitting of the sealing material is formed by the expanded diameter short column portion T of the male die M 2 (expanding process) immediately— That is, the curled outer flange portion 3 is continuously formed on the end portion 2 of the metal pipe 1 at the curl forming recess C of the male mold M 2 (curling process). In the illustrated example, the curl forming recess C is formed in an upper opening shape in a small arc shape along the outer periphery of the base of the enlarged short column portion T. Note that “acting the female mold M 1 and the male mold M 2 in the approaching direction” means that both the female mold M 1 and the male mold M 2 are operated in the approaching direction, defined to refer to a case where one of the actuating in the approaching direction to the other of the female mold M 1 or male mold M 2.
[0016]
Incidentally, the female mold M 1 and the lower mold may be an upper mold and male mold M 2.
[0017]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists an effect described below.
[0018]
The female side structure A is formed by integrally molding the curled outer flange portion 3 and the large-diameter short cylindrical portion 4 with the metal pipe 1 by plastic working on the end portion 2 of the metal pipe 1. Minimized and easy to manufacture. In particular, the invention eliminates the need for brazing and can contribute to cost reduction. Further, since the female side structure A is made of one kind of material, the recyclability is good .
[Brief description of the drawings]
FIG. 1 is a front view showing a use state of an embodiment of the present invention.
FIG. 2 is a cross-sectional front view showing a use state (connection state).
FIG. 3 is a side view showing a connecting member.
FIG. 4 is an explanatory sectional front view showing a state before connection;
FIG. 5 is a sectional front view for explaining a manufacturing method.
FIG. 6 is a sectional front view for explaining a manufacturing method.
FIG. 7 is a sectional front view for explaining a manufacturing method.
FIG. 8 is a sectional front view showing a conventional example.
[Explanation of symbols]
1 , 1a metal pipe 2 end 3 (curled) outer flange 4 large diameter short cylinder
4a exterior
6 Outer flange
7 concave groove
8 Ring body A Female side structure B Male side structure B 0 Male side tip
B 1 exterior
E 1 Large diameter arc part
E 2 small diameter arc part
K connecting member
K 0 Long hole S Sealing material

Claims (1)

雌側構造体（Ａ）と、該雌側構造体（Ａ）に挿入される雄側構造体（Ｂ）と、該雌側構造体（Ａ）及び該雄側構造体（Ｂ）に径方向から弾発的かつ外嵌状に付設されて該雌側構造体（Ａ）と該雄側構造体（Ｂ）とを相互に接続する接続部材（Ｋ）と、を備えた管継手構造であって、
上記雌側構造体（Ａ）は、上記雄側構造体（Ｂ）が挿入される大径短円筒部（４）と、該大径短円筒部（４）の最外端に形成されるカール状外フランジ部（３）と、を有し、かつ、該大径短円筒部（４）と該カール状外フランジ部（３）とは、雌側の金属パイプ（１）の端部（２）に塑性加工にて、該雌側の金属パイプ（１）と一体に成型され、
上記雄側構造体（Ｂ）は、雄側の金属パイプ（１ａ）の最先端に塑性加工にて突出状に形成された外フランジ部（６）と、該雄側の金属パイプ（１ａ）の外周面に外嵌されて該外フランジ部（６）から小寸法（Ｚ）だけ内側に設けられたリング体（８）と、該外フランジ部（６）と該リング体（８）との間に形成された凹周溝（７）に嵌着されるシール材（Ｓ）と、を有し、
上記リング体（８）は、上記雄側の金属パイプ（１ａ）に外径方向に塑性加工にて形成された小鍔部にて固着され、
上記接続部材（Ｋ）は、上記雌側構造体（Ａ）の上記カール状外フランジ部（３）と部分的に嵌合する長孔（Ｋ 0 ）と、該長孔（Ｋ 0 ）の一側に設けられると共に該雌側構造体（Ａ）の上記大径短円筒部（４）の外面（４ａ）に沿う大径円弧部（Ｅ 1 ）と、該長孔（Ｋ 0 ）の他側に設けられると共に上記雄側の金属パイプ（１ａ）の外面に沿う小径円弧部 ( Ｅ 2 ) と、を備えたことを特徴とする管継手構造。 The female side structure (A), the male side structure (B) inserted into the female side structure (A), the female side structure (A) and the male side structure (B) in the radial direction And a connecting member (K) that is elastically and externally attached to connect the female side structure (A) and the male side structure (B) to each other. And
The female-side structure (A) includes a large-diameter short cylindrical portion (4) into which the male-side structure (B) is inserted, and a curl formed at the outermost end of the large-diameter short cylindrical portion (4). An outer flange portion (3), and the large-diameter short cylindrical portion (4) and the curled outer flange portion (3) are end portions (2) of the metal pipe (1) on the female side. ) By plastic working and is molded integrally with the female-side metal pipe (1) ,
The male side structure (B) includes an outer flange portion (6) formed in a protruding shape by plastic working at the forefront of the male side metal pipe (1a), and the male side metal pipe (1a). A ring body (8) that is externally fitted to the outer peripheral surface and is provided inwardly by a small dimension (Z) from the outer flange section (6), and between the outer flange section (6) and the ring body (8) And a sealing material (S) fitted into the concave circumferential groove (7) formed in
The ring body (8) is fixed to the male-side metal pipe (1a) with a small collar portion formed by plastic working in the outer diameter direction,
The connecting member (K), said female structures above curled outer flange portion (A) and (3) and partially fitted to a long hole (K 0), one said long hole (K 0) A large-diameter arc part (E 1 ) provided on the outer side (4a) of the large-diameter short cylindrical part (4) of the female-side structure (A ) and the other side of the long hole (K 0 ) KanTsugi hand structure characterized by comprising a small-diameter arcuate portion along the outer surface of the male side of the metal pipe (1a) and (E 2), together with provided.
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JP4973275B2 (en) * 2007-03-28 2012-07-11 株式会社ノーリツ Manufacturing method of pipe joint
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JP5670158B2 (en) * 2010-11-16 2015-02-18 坂本精器株式会社 Pipe fitting device
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