JP2680273B2 - Connection device between steel pipe for piping and hose - Google Patents
Connection device between steel pipe for piping and hoseInfo
- Publication number
- JP2680273B2 JP2680273B2 JP6269613A JP26961394A JP2680273B2 JP 2680273 B2 JP2680273 B2 JP 2680273B2 JP 6269613 A JP6269613 A JP 6269613A JP 26961394 A JP26961394 A JP 26961394A JP 2680273 B2 JP2680273 B2 JP 2680273B2
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- piping
- hose
- pipe
- seat surface
- 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 - Lifetime
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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/04—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts using additional rigid rings, sealing directly on at least one pipe end, which is flared either before or during the making of the connection
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高圧ホースから中低圧
ホースまで全ての各種ホースと、外径が不揃いな配管用
鋼管とを直接接続し得るようにした接続装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting device capable of directly connecting all kinds of hoses from a high pressure hose to a medium and low pressure hose and a steel pipe for piping having an uneven outer diameter.
【０００２】[0002]
【従来の技術】一般に、建設機械、射出成型機、油圧プ
レス等の油圧配管や、各種空圧機器における空圧配管等
においては、配管用鋼管とホースとを接続することが行
なわれている。ところが、このようなものにおいては上
記接続部の気密性を確保するため、互いに接続される管
端部にそれぞれシート面を形成し、そのシート面を互い
に密接させる必要がある。2. Description of the Related Art Generally, in a hydraulic pipe such as a construction machine, an injection molding machine, a hydraulic press, or a pneumatic pipe in various pneumatic equipments, a steel pipe for piping and a hose are connected. However, in such a case, in order to ensure the airtightness of the above-mentioned connecting portion, it is necessary to form a sheet surface at each of the pipe end portions connected to each other and bring the sheet surfaces into close contact with each other.
【０００３】しかしながら、長さの長い配管用鋼管の管
端に直接シート面を形成するとともに、その外周部に結
合用のねじを加工することはきわめて困難であった。す
なわち、管端部にシート面を切削加工で加工する場合に
は、バイトを固定し、被加工物である長い配管用鋼管を
回転する必要があるが、鋼管の外径の真円度が悪いため
振動が発生し、ビビリが起こり、平滑で、精度の高いシ
ート面を形成することは不可能に近かった。しかも、管
端に結合ねじを加工する必要があるが、配管用鋼管の外
径真円度が悪いということは、シート面センターと結合
ねじセンターが狂う原因ともなる等の問題がある。However, it has been extremely difficult to form a seat surface directly on the pipe end of a long steel pipe for piping and to machine a connecting screw on the outer peripheral portion thereof. That is, when cutting the sheet surface at the pipe end, it is necessary to fix the bite and rotate the long pipe steel pipe that is the work piece, but the circularity of the outer diameter of the steel pipe is poor. As a result, vibration occurs and chattering occurs, and it is almost impossible to form a smooth and highly accurate sheet surface. In addition, it is necessary to machine a connecting screw at the pipe end, but the poor circularity of the outer diameter of the steel pipe for piping causes a problem that the center of the seat surface and the center of the connecting screw are deviated.
【０００４】そこで、従来配管用鋼管とホースとの接続
に際しては、上記配管用鋼管の一端に特別のアダプタを
装着することが行われている。Therefore, when connecting a steel pipe for piping and a hose, a special adapter is conventionally attached to one end of the steel pipe for piping.
【０００５】すなわち、図５は従来の配管用鋼管とホー
スとの接続の一例を示す図であり、配管用鋼管１の管端
には管用テーパおねじ１ａが形成してあり、その管用テ
ーパおねじ１ａ部にアダプタ２が螺着してある。上記ア
ダプタ２の他端にはホースと接続するためのシート面２
ａが形成されており、その他端部外周に管用平行ねじ２
ｂが形成されている。なお、配管用鋼管１とアダプタ２
の接続には溶接等他の方法が用いられることもある。That is, FIG. 5 is a view showing an example of the connection between a conventional steel pipe for piping and a hose, in which a pipe taper male screw 1a is formed at the pipe end of the pipe steel pipe 1, and the pipe taper male screw 1a is formed. The adapter 2 is screwed onto the screw 1a portion. At the other end of the adapter 2 is a seat surface 2 for connecting with a hose.
a is formed, and parallel threads 2 for pipes are provided on the outer circumference of the other end.
b is formed. In addition, the steel pipe for piping 1 and the adapter 2
Other methods, such as welding, may be used for the connection.
【０００６】一方、上記配管用鋼管１に接続するための
ホース３の管端部には、先端に上記アダプタ２のシート
面２ａに係合するシート面４ａを有する接続具４が固着
されている。その接続具４には周方向に延びる凹溝４ｂ
が形成されており、その凹溝４ｂに上記接続具４に外嵌
されたユニオンナット５の基端部が係合され、上記ユニ
オンナット５が上記接続具４に対して回動のみ可能に装
着してある。On the other hand, a connector 4 having a seat surface 4a engaging with the seat surface 2a of the adapter 2 is fixedly attached to the end of the hose 3 for connecting to the steel pipe 1 for piping. . The connecting tool 4 has a groove 4b extending in the circumferential direction.
Is formed, and the base end portion of the union nut 5 externally fitted to the connecting tool 4 is engaged with the concave groove 4b, and the union nut 5 is mounted so as to be rotatable only with respect to the connecting tool 4. I am doing it.
【０００７】しかして、配管用鋼管１にホース３を接続
する場合には、接続具４のシート面４ａをアダプタ２の
シート面２ａに当接させ、ユニオンナット５をアダプタ
２の管用平行ねじ２ｂに螺合することによって、両シー
ト面４ａ、２ａを圧接させるとともに、配管用鋼管１と
ホース３との接続を行うことができる。When the hose 3 is connected to the steel pipe 1 for piping, the seat surface 4a of the connector 4 is brought into contact with the seat surface 2a of the adapter 2 and the union nut 5 is attached to the parallel pipe thread 2b of the adapter 2. By screwing into the sheet surfaces 4a and 2a, the steel pipes 1 for piping and the hose 3 can be connected together.
【０００８】[0008]
【発明が解決しようとする課題】しかし、このようなも
のにおいては、配管用鋼管とホースとの接続にあたって
常にアダプタを使用する必要があり、アダプタと接続具
のシート面のみならずアダプタと配管用鋼管の接続部に
も気密性を確保しなければならない等の問題がある。However, in such a case, it is necessary to always use the adapter for connecting the steel pipe for piping and the hose, and not only for the seat surface of the adapter and the connector, but also for the adapter and the pipe. There is a problem that the airtightness must be ensured also in the connection portion of the steel pipe.
【０００９】本発明はこのような点に鑑み上記アダプタ
を省略し、配管用鋼管とホースとを直接接続し得るよう
にした接続装置を得ることを目的とする。In view of the above points, the present invention has an object to obtain a connecting device in which the above-mentioned adapter is omitted and the steel pipe for piping and the hose can be directly connected.
【００１０】[0010]
【課題を解決するための手段】本発明は、配管用鋼管の
管端部に絞り加工によって形成された肉厚部の外周に転
造によって結合用おねじを形成するとともに、その絞り
加工部をチャックして上記配管用鋼管の管端にシート面
を加工し、そのシート面に、ホースの一端に取り付けら
れた接続具の先端のシート面を圧接し、上記接続具に装
着されたユニオンナットを上記結合用おねじに螺着した
ことを特徴とする。According to the present invention, a male thread for connection is formed by rolling on the outer circumference of a thick portion formed by drawing at the pipe end of a steel pipe for piping, and the drawn portion is formed. Chuck and process the sheet surface on the pipe end of the steel pipe for piping, press the sheet surface of the tip of the connector attached to one end of the hose to the sheet surface, and attach the union nut attached to the connector. It is characterized in that it is screwed to the male screw for coupling.
【００１１】[0011]
【作用】接続具の先端に形成されたシート面を配管用鋼
管の管端に設けられたシート面に圧接し、ユニオンナッ
トを管端部に転造によって形成された結合用おねじに螺
合することにより、ホースを直接配管用鋼管に接続する
ことができる。したがって、従来のアダプタを必要とせ
ず、またシール部も１個所となり気密性に対する心配も
減らすことができる。[Operation] The seat surface formed at the tip of the connector is pressed against the seat surface provided at the pipe end of the steel pipe for piping, and the union nut is screwed onto the male screw for connection formed at the pipe end by rolling. By doing so, the hose can be directly connected to the steel pipe for piping. Therefore, the conventional adapter is not required, and the seal portion is also provided in one place, so that the concern about airtightness can be reduced.
【００１２】[0012]
【実施例】以下、添付図面を参照して本発明の実施例に
ついて説明する。なお、図中、図５と同一部分には同一
符号を付しその詳細な説明を省略する。Embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure, the same parts as those in FIG. 5 are designated by the same reference numerals, and detailed description thereof will be omitted.
【００１３】図１において、符号１は配管用鋼管であっ
て、その管端部には絞り加工によって、シート面を形成
するのに必要な肉厚部が形成されている。すなわち、図
２は絞り加工前の配管用鋼管１の一部断面側面図であ
り、その管端部に、図３に示すように所定長さ範囲にわ
たって絞り加工を行い、規格上公差が大きいため外径が
不揃いの市販の配管用鋼管に所定径Ｒ（有効径）を有す
る転造ねじ下径作りを行い、その後、管端面に内方に向
って縮径するように傾斜したシート面１０を形成する。
そこで、上記絞り加工をした部分の外周部に、転造によ
って結合用おねじ１１を形成する。図４に転造ねじ加工
後の配管用鋼管の一部断面を示す。In FIG. 1, reference numeral 1 is a steel pipe for piping, and a thick portion necessary for forming a sheet surface is formed at the end of the pipe by drawing. That is, FIG. 2 is a partial cross-sectional side view of the piping steel pipe 1 before drawing, and the pipe end is drawn over a predetermined length range as shown in FIG. A rolled steel screw having a predetermined diameter R (effective diameter) is made on a commercially available steel pipe for piping having an uneven outer diameter, and then the seat surface 10 inclined so as to be reduced inward is formed on the pipe end surface. Form.
Therefore, the male thread 11 for coupling is formed on the outer peripheral portion of the drawn portion by rolling. FIG. 4 shows a partial cross section of the steel pipe for piping after the thread rolling.
【００１４】このようにして形成された配管用鋼管１に
ホース３を接続する場合には、図１に示すように、ホー
ス３の管端部に固着された接続具４の先端部に形成され
ている切頭円錐状のシート面４ａを、上記配管用鋼管１
の管端部に形成されているシート面１０に係合させ、そ
の接続具４に装着されているユニオンナット５を上記配
管用鋼管１の転造による結合用おねじ１１に螺合するこ
とによって、上記両シート面４ａ、１０を密着させ、配
管用鋼管１とホース３との接続を行う。When connecting the hose 3 to the steel pipe 1 for piping thus formed, as shown in FIG. 1, the hose 3 is formed at the tip of the connector 4 fixed to the end of the hose 3. The frusto-conical seat surface 4a which is formed is the steel pipe 1 for piping described above.
By engaging with the seat surface 10 formed at the pipe end of the pipe, and screwing the union nut 5 mounted on the connector 4 into the male thread 11 for coupling by rolling the steel pipe 1 for piping. Then, the sheet surfaces 4a and 10 are brought into close contact with each other, and the steel pipe 1 for piping and the hose 3 are connected.
【００１５】ところで、配管用鋼管の管端に直接シート
面を形成するとともに外周面におねじを切削加工する場
合には、シート面及びおねじを形成するのに必要な肉厚
がある配管用鋼管を選定する必要があるが、この場合、
シート面以外ではその肉厚は不必要な厚さで過剰な肉厚
のため、コスト、重量面で不利益である。By the way, when a seat surface is formed directly on the pipe end of a steel pipe for piping and a screw is machined on the outer peripheral surface, the pipe surface has a wall thickness necessary for forming the seat surface and the male screw. It is necessary to select a steel pipe, but in this case,
Except for the sheet surface, the wall thickness is unnecessarily thick and excessive, which is disadvantageous in terms of cost and weight.
【００１６】これに対し、本発明においては、上述のよ
うに管端部に絞り加工部を設け、その外周面に転造によ
って結合用おねじを設けたので、シート面形成に必要な
肉厚部を十分確保することができる。また、絞り加工を
行なうことで、規格上公差が大きいため外径が不揃い
で、その上外径真円度が悪い配管用鋼管に、一定の外径
と良好な真円度をもった絞り後の外径部を形成すること
ができ、その絞り加工部をチャックして加工することに
より、ビビリの発生を防ぎ、良好なシート面を形成する
と同時に、転造により結合用おねじを形成する場合シー
ト面センターと結合用転造ねじセンターとを、転造加工
の特性によって狂うことがなく形成でき、ホースと結合
したとき、シート面における気密性を確実に保持させる
ことができる。On the other hand, according to the present invention, as described above, the drawn portion is provided at the end of the pipe, and the male thread for connection is provided by rolling on the outer peripheral surface thereof. Enough parts can be secured. In addition, by performing drawing, the outer diameter is not uniform due to the large tolerance in the standard, and on top of that, the steel pipe for piping with a poor outer roundness has a constant outer diameter and good roundness. When the outer diameter part of the can be formed and the drawn part is chucked and processed to prevent chattering and to form a good sheet surface, at the same time forming a male thread for coupling by rolling. The seat surface center and the joining rolling screw center can be formed without being deformed due to the characteristics of the rolling process, and when joined to the hose, the airtightness of the seat surface can be reliably maintained.
【００１７】[0017]
【発明の効果】本発明は上述の如き構成によって配管用
鋼管とホースを直接接続することができ、従来のアダプ
タを省略でき、機密性の向上とコストダウンを図ること
ができる。また、配管用鋼管を狙った角度や半径で曲げ
加工を施すことにより、配管用鋼管に結ばれたホースの
方向や角度を自由に選定することができる。According to the present invention, the steel pipe for piping and the hose can be directly connected by the above-mentioned constitution, the conventional adapter can be omitted, and the airtightness can be improved and the cost can be reduced. Further, by bending the steel pipe for piping at a target angle and radius, the direction and angle of the hose connected to the steel pipe for piping can be freely selected.
【図１】本発明の配管用鋼管とホースとの接続装置の一
部断面図。FIG. 1 is a partial cross-sectional view of a connecting device between a steel pipe for piping and a hose according to the present invention.
【図２】絞り加工前の配管用鋼管の部分断面図。FIG. 2 is a partial cross-sectional view of a steel pipe for piping before drawing.
【図３】絞り加工後の配管用鋼管の部分断面図。FIG. 3 is a partial cross-sectional view of a steel pipe for piping after drawing.
【図４】転造ねじ加工後の配管用鋼管の部分断面図。FIG. 4 is a partial cross-sectional view of a steel pipe for piping after thread rolling.
【図５】従来の接続装置を示す一部断面図。FIG. 5 is a partial cross-sectional view showing a conventional connecting device.
１ 配管用鋼管 ２ アダプタ ２ａ シート面 ３ ホース ４ 接続具 ５ ユニオンナット １０ シート面 １１ 結合用おねじ 1 Steel Pipe 2 Piping 2 Adapter 2a Seat Surface 3 Hose 4 Connector 5 Union Nut 10 Seat Surface 11 Male Thread for Coupling
Claims (1)
成された肉厚部の外周に転造によって結合用おねじを形
成するとともに、その絞り加工部をチャックして上記配
管用鋼管の管端にシート面を加工し、そのシート面に、
ホースの一端に取り付けられた接続具の先端のシート面
を圧接し、上記接続具に装着されたユニオンナットを上
記結合用おねじに螺着したことを特徴とする、配管用鋼
管とホースとの接続装置。1. A male thread for connection is formed by rolling on the outer periphery of a thick portion formed by drawing at the pipe end of a steel pipe for piping, and the drawn portion is chucked and arranged as described above.
The sheet surface is processed on the pipe end of the steel pipe for pipes, and the sheet surface is
The sheet surface of the tip of the connector attached to one end of the hose is pressure-welded, and the union nut attached to the connector is screwed to the male thread for coupling, the steel pipe for piping and the hose Connection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6269613A JP2680273B2 (en) | 1994-11-02 | 1994-11-02 | Connection device between steel pipe for piping and hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6269613A JP2680273B2 (en) | 1994-11-02 | 1994-11-02 | Connection device between steel pipe for piping and hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08128571A JPH08128571A (en) | 1996-05-21 |
| JP2680273B2 true JP2680273B2 (en) | 1997-11-19 |
Family
ID=17474797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6269613A Expired - Lifetime JP2680273B2 (en) | 1994-11-02 | 1994-11-02 | Connection device between steel pipe for piping and hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2680273B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101139766B1 (en) * | 2009-07-30 | 2012-04-27 | 대호 (주) | Couple for hydraulic line |
| CN110145649A (en) * | 2019-05-20 | 2019-08-20 | 海盐县海管管件制造有限公司 | A kind of air-pressure brake pipeline inserted sleeve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04185990A (en) * | 1990-11-20 | 1992-07-02 | Mitsubishi Motors Corp | Flare joint connecting method |
-
1994
- 1994-11-02 JP JP6269613A patent/JP2680273B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08128571A (en) | 1996-05-21 |
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| EXPY | Cancellation because of completion of term |