JP2009144916A - Connection method of tube and tube joint, and tube joint - Google Patents
Connection method of tube and tube joint, and tube joint Download PDFInfo
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- JP2009144916A JP2009144916A JP2008295515A JP2008295515A JP2009144916A JP 2009144916 A JP2009144916 A JP 2009144916A JP 2008295515 A JP2008295515 A JP 2008295515A JP 2008295515 A JP2008295515 A JP 2008295515A JP 2009144916 A JP2009144916 A JP 2009144916A
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- tube
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- hole
- fixing ring
- nut
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- 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
- F16L19/05—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 with a rigid pressure ring between the screwed member and the exterior of the flared pipe end
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- 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
- F16L47/04—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with a swivel nut or collar engaging the pipe
- F16L47/041—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with a swivel nut or collar engaging the pipe the plastic pipe end being flared either before or during the making of the connection
Abstract
Description
本発明は、チューブとチューブ継手との接続方法及びそのチューブ継手に関するものである。
The present invention relates to a method for connecting a tube and a tube joint and the tube joint.
半導体の製造、医薬品の製造、あるいは食品の加工プロセスにおいて、使用する流体の漏れを防止するために、チューブとチューブ継手との強固な接続が要求されており、従来の接続方法としては、特に以下の２種類が知られている。 In order to prevent leakage of fluids used in semiconductor manufacturing, pharmaceutical manufacturing, or food processing processes, a strong connection between tubes and tube fittings is required. Two types are known.
図１０に示すように、一つ目の従来のチューブ継手は、継手本体（６０ａ）と連結ナット（７０ａ）を含み、前記継手本体（６０ａ）の一端に接続部及びねじ山部が形成され、前記継手本体（６０ａ）の連結部にチューブ（８０ａ）が接続されると共に、前記連結ナット（７０ａ）の内部に、前記継手本体（６０ａ）のねじ山部と螺合するねじ孔部と、前記継手本体（６０ａ）の連結部と、前記チューブ（８０ａ）を挟持する縮径部とが形成されているものである。 As shown in FIG. 10, the first conventional tube joint includes a joint body (60a) and a connecting nut (70a), and a connection portion and a thread portion are formed at one end of the joint body (60a). A tube (80a) is connected to the coupling portion of the joint body (60a), and a screw hole portion that is screwed into a thread portion of the joint body (60a) inside the coupling nut (70a), A connecting portion of the joint body (60a) and a reduced diameter portion for sandwiching the tube (80a) are formed.
また、図１１に示すように、二つ目の従来のチューブ継手は、連結部（５０）と、継手本体（６０）と、連結ナット（７０）とを含み、前記連結部（５０）の外周面に環状凸部（５１）が形成され、前記環状凸部（５１）にチューブ（８０）の端部（８１）が接続されるものである。また、チューブ継手と前記チューブ（８０）とを接続するには、図１３に示すように、前記連結部（５０）と前記チューブ（８０）とを、所定の加工機械のクランプ（９０）によって保持して、前記加工機械の押圧部材（９１）によって前記連結部（５０）を押圧し、チューブ（８０）における、環状凸部（５１）と対応する位置に係合凹部（８２）を形成させる加工を行う必要があった。 As shown in FIG. 11, the second conventional tube joint includes a connecting portion (50), a joint body (60), and a connecting nut (70), and the outer periphery of the connecting portion (50). An annular projection (51) is formed on the surface, and an end (81) of the tube (80) is connected to the annular projection (51). In order to connect the tube joint and the tube (80), as shown in FIG. 13, the connecting portion (50) and the tube (80) are held by a clamp (90) of a predetermined processing machine. Then, the connecting portion (50) is pressed by the pressing member (91) of the processing machine, and the engagement recess (82) is formed in the tube (80) at a position corresponding to the annular protrusion (51). Had to do.
そして、図１２に示すように、加工する前に前記連結ナット（７０）を挿通させた前記チューブ（８０）の端部にある前記連結部（５０）を前記継手本体（６０）内に挿入させ、前記連結ナット（７０）を前記継手本体（６０）に螺合させ、前記チューブ（８０）を挟持する。尚、このとき、前記連結ナット（７０）に形成される圧接端部（７１）は、前記チューブ（８０）の前記係合凸部（８２）に当接した状態となっている。
And as shown in FIG. 12, the said connection part (50) in the edge part of the said tube (80) which penetrated the said connection nut (70) before processing is inserted in the said coupling main body (60). The coupling nut (70) is screwed into the joint body (60), and the tube (80) is clamped. At this time, the press contact end portion (71) formed on the connection nut (70) is in contact with the engagement convex portion (82) of the tube (80).
しかしながら、前記一つ目の従来のチューブ継手によれば、前記連結ナット（７０ａ）の硬さが前記チューブ（８０ａ）の硬さを上回る場合、チューブ継手とチューブとを接続することはできるが、前記連結ナット（７０ａ）を締め込む際に、その端部が前記チューブ（８０ａ）に環状の傷をつけてしまう心配があり、場合によっては前記チューブ（８０ａ）を切断しかねない。また、前記連結ナット（７０ａ）の硬さが、前記チューブ（８０ａ）と同等あるいはそれより低い場合には、チューブ継手とチューブ（８０ａ）とをしっかりと接続できないので、強い締め付けが必要で、本体を変形させ、流体の円滑な流れを妨げ、また、シール機能を十分に発揮させることができない上に、チューブが抜ける危険があった。 However, according to the first conventional tube joint, when the hardness of the connecting nut (70a) exceeds the hardness of the tube (80a), the tube joint and the tube can be connected, When tightening the connecting nut (70a), there is a concern that the end of the connecting nut (70a) may cause an annular scratch on the tube (80a), and in some cases, the tube (80a) may be cut. Further, when the hardness of the connecting nut (70a) is equal to or lower than that of the tube (80a), the tube joint and the tube (80a) cannot be firmly connected. As a result, the smooth flow of the fluid is hindered, the sealing function cannot be fully exhibited, and the tube may be pulled out.
また、前記二つ目の従来のチューブ継手によれば、チューブ（８０）を強固に接続することはできるが、チューブ（８０）と連結部（５０）とを接続してから前記係合凹部を形成する加工処理を行う必要があるので、使用上非常に不便である。 Further, according to the second conventional tube joint, the tube (80) can be firmly connected, but the engagement recess is formed after the tube (80) and the connecting portion (50) are connected. Since it is necessary to perform the processing to form, it is very inconvenient in use.
更に、前記チューブ継手と前記チューブ（８０）とを接続するには、前記連結部（５０）を前記継手本体（６０）に挿入し、前記連結ナット（７０）を前記継手本体（６０）に螺合することにより、前記チューブ（８０）を挟持することから、前記連結部（５０）と前記継手本体（６０）を複雑な形状に設計する必要があるので、製造コストが増大するといった問題があった。 Further, in order to connect the tube joint and the tube (80), the connecting portion (50) is inserted into the joint body (60), and the connection nut (70) is screwed into the joint body (60). As a result, the tube (80) is clamped, so that it is necessary to design the connecting portion (50) and the joint body (60) in a complicated shape, which increases the manufacturing cost. It was.
そこで、案出されたのが本発明であって、従来の、チューブとチューブ継手とを接続する際の不便さを改善すると共に、チューブ継手の安全性向上・小型化・軽量化を達成することができるチューブとチューブ継手との接続方法及びそのチューブ継手を提供することを目的としている。
Accordingly, the present invention has been devised to improve the inconvenience of connecting a tube and a tube joint, and to improve the safety, size and weight of the tube joint. It is an object of the present invention to provide a connection method between a tube and a tube joint, and the tube joint.
本発明の請求項１は、チューブ連結部（１１）及び螺合部（１３）を含む中空の継手本体（１０）と、内部に螺合孔（２２）が形成され、該螺合孔（２２）の一端に当接面（２２４）を有する縮径部（２２３）が形成される連結ナット（２０）と、前記連結ナット（２０）の内部に嵌め込まれて、当接面（２２４）に当接される固定リング（３０）と、を含む樹脂製のチューブ継手（１）を、樹脂製のチューブ（４０）の端部に固定する方法において、前記チューブ（４０）の一端を、前記連結ナット（２０）及び前記固定リング（３０）に貫入し、前記連結ナット（２０）に貫入された前記チューブ（４０）の端部にチューブ拡径部（４１）を形成し、前記継手本体（１０）の前記チューブ連結部（１１）を挿入し、前記連結ナット（２０）を回転させながら、前記チューブ連結部（１１）を前記固定リング（３０）に当接させる、ことを特徴とするチューブ継手とチューブの接続方法を提供するものである。 According to the first aspect of the present invention, a hollow joint body (10) including a tube connecting portion (11) and a screwing portion (13), and a screwing hole (22) are formed therein, and the screwing hole (22 ) And a connection nut (20) in which a reduced diameter portion (223) having a contact surface (224) is formed at one end thereof, and the contact nut (20) is fitted into the connection nut (20). In a method of fixing a resin tube joint (1) including a fixing ring (30) to be contacted to an end of a resin tube (40), one end of the tube (40) is connected to the connecting nut. (20) and the fixing ring (30), a tube diameter-expanded portion (41) is formed at the end of the tube (40) penetrated into the connecting nut (20), and the joint body (10) The tube connecting part (11) is inserted and the connecting nut (20 While rotating, the tube connecting portion (11) is brought into contact with the fixing ring (30), it is intended to provide a method of connecting the tube fitting and the tube, characterized in.
本発明の請求項２は、前記固定リング（３０）の硬さは、接続されるチューブ（４０）より硬いことを特徴とする請求項１に記載のチューブ継手とチューブの接続方法を提供するものである。
Claim 2 of the present invention provides the tube coupling and tube connection method according to
本発明の請求項３は、一端にチューブ連結部（１１）が設けられ、前記チューブ連結部（１１）より外径が大きく、外周面にねじ山部が形成される螺合部（１３）を含み、内部に貫通孔（１４）が形成される継手本体（１０）と、内部に前記チューブ連結部（１１）が挿入されると共に、前記螺合部（１３）と螺合する螺合孔（２２）が形成され、前記螺合孔（２２）の一端に、当接面（２２４）を有する縮径部（２２３）が形成される連結ナット（２０）と、前記連結ナット（２０）の内部の螺合孔（２２）内に設けられ、当接面（２２４）に当接される少なくとも１つの固定リング（３０）と、を含み、前記固定リング（３０）の硬さは、接続されるチューブ（４０）より硬いことを特徴とするチューブ継手を提供するものである。 According to a third aspect of the present invention, there is provided a threaded portion (13) provided with a tube connecting portion (11) at one end, an outer diameter larger than that of the tube connecting portion (11), and a threaded portion formed on the outer peripheral surface. A joint body (10) in which a through-hole (14) is formed, and a threaded hole (10) in which the tube connecting part (11) is inserted and threadedly engaged with the threaded part (13). 22) and a connection nut (20) in which a reduced diameter portion (223) having a contact surface (224) is formed at one end of the screw hole (22), and the inside of the connection nut (20) At least one fixing ring (30) provided in the screwing hole (22) and abutted against the abutting surface (224), and the hardness of the fixing ring (30) is connected A tube joint characterized by being harder than the tube (40) is provided.
本発明の請求項４は、前記固定リング（３０）に形成される当接端（３１）の角度は、３０度から９５度であることを特徴とする請求項３に記載のチューブ継手を提供するものである。 A fourth aspect of the present invention provides the tube joint according to claim 3, wherein the angle of the contact end (31) formed on the fixing ring (30) is 30 to 95 degrees. To do.
本発明の請求項５は、前記連結ナット（２０）の内部の螺合孔（２２）に複数の固定リング（３０）が並列に設けられていることを特徴とする請求項３または４に記載のチューブ継手を提供するものである。 Claim 5 of the present invention is characterized in that a plurality of fixing rings (30) are provided in parallel in a screw hole (22) inside the connection nut (20). Tube joints are provided.
本発明の請求項６は、前記螺合孔（２２）の内周面にねじ孔部（２２１）が形成され、前記前記ねじ孔部（２２１）に固定リング（３０）が位置していることを特徴とする請求項３乃至５の何れか一項に記載のチューブ継手を提供するものである。 According to a sixth aspect of the present invention, a screw hole portion (221) is formed on an inner peripheral surface of the screw hole (22), and a fixing ring (30) is positioned in the screw hole portion (221). A tube joint according to any one of claims 3 to 5 is provided.
本発明の請求項７は、前記螺合孔（２２）の内周面における、縮径部（２２３）に近い一端に平滑孔部（２２２）が形成されると共に、他端にねじ孔部（２２１）が形成され、前記平滑孔部（２２２）に前記固定リング（３０）が位置していることを特徴とする請求項３乃至５の何れか一項に記載のチューブ継手を提供するものである。 According to a seventh aspect of the present invention, a smooth hole portion (222) is formed at one end close to the reduced diameter portion (223) on the inner peripheral surface of the screwing hole (22), and a screw hole portion ( 221) is formed, and the fixing ring (30) is positioned in the smooth hole portion (222). The tube joint according to any one of claims 3 to 5, wherein is there.
本発明の請求項８は、前記継手本体（１０）が一体に形成されていることを特徴とする請求項３乃至７の何れか一項に記載のチューブ継手を提供するものである。 An eighth aspect of the present invention provides the tube joint according to any one of the third to seventh aspects, wherein the joint body (10) is integrally formed.
本発明の請求項９は、前記継手本体（１０）が連結部（１３）を含む第１本体（１０Ａ）とチューブ連結部（１１）を含む第２本体（１０Ｂ）とからなり、前記第１本体（１０Ａ）の一端の内部に拡径組合せ穴（１０１Ａ）が形成され、前記拡径組合せ穴（１０１Ａ）に第２本体（１０Ｂ）におけるチューブ連結部（１１）の一端が挿入されていることを特徴とする請求項３乃至７の何れか一項に記載のチューブ継手を提供するものである。 According to a ninth aspect of the present invention, the joint body (10) includes a first body (10A) including a connecting portion (13) and a second body (10B) including a tube connecting portion (11). A diameter expansion combination hole (101A) is formed inside one end of the main body (10A), and one end of the tube connecting portion (11) in the second main body (10B) is inserted into the diameter expansion combination hole (101A). A tube joint according to any one of claims 3 to 7 is provided.
本発明の請求項１０は、前記チューブ連結部（１１）の外周面と前記拡径組合せ穴（１０１Ａ）の内周面との間には、前記チューブ（４０）の厚みに相当する遊びが存在していることを特徴とする請求項９に記載のチューブ継手を提供するものである。 According to a tenth aspect of the present invention, there is play corresponding to the thickness of the tube (40) between the outer peripheral surface of the tube connecting portion (11) and the inner peripheral surface of the enlarged diameter combination hole (101A). The tube joint according to claim 9 is provided.
本発明の請求項１１は、前記チューブ連結部（１１）の外周面と拡径組合せ穴（１０１Ａ）の内周面とが密着していることを特徴とする請求項９に記載のチューブ継手を提供するものである。
The eleventh aspect of the present invention is the tube joint according to claim 9, wherein the outer peripheral surface of the tube connecting portion (11) and the inner peripheral surface of the enlarged diameter combination hole (101A) are in close contact. It is to provide.
本発明は上記の課題を解決するものであり、このチューブとチューブ継手との接続方法及びそのチューブ継手によれば、以下の効果を奏することができる。
１．連結ナットの内部に硬さがチューブより硬い固定リングが設けられるので、連結ナットの端部に形成される縮径部を補強でき、且つ接続時の連結ナットの変形を抑制することができる。
２．連結ナットと継手本体とを螺合させるときには、固定リングと継手本体のチューブ連結部でチューブを挟持して、チューブを変形させることにより、連結ナットにおける縮径部にかかる応力を軽減させて変形を減少させる故に、この構成によれば、チューブとチューブ継手とを強固に接続できることから、引っ張りや揺れにより外れることはなく、固定リングが連結ナットとともに回転することもないので、チューブの周囲に環状の傷をつけることなく、チューブ内の流体の漏れを防止することができる。
３．連結ナットと継手本体とを螺合させるときに、固定リングの効果により、大きな力を使わなくとも、簡単に締め付けるだけで、好適な挟持力を得ることができるので、本体を変形させることなくチューブ内における流体の円滑な流れを常に保つことができる。
４．連結ナット内に固定リングを設けることで、連結ナットと継手本体とを螺合するときに、固定リングと継手本体によってチューブを簡単に挟持することができることから、チューブ継手の構造をより簡単にできるので、低コスト化を図ることができる。
The present invention solves the above-mentioned problems, and according to the method for connecting the tube and the tube joint and the tube joint, the following effects can be achieved.
1. Since a fixing ring whose hardness is harder than that of the tube is provided inside the connection nut, the reduced diameter portion formed at the end of the connection nut can be reinforced, and deformation of the connection nut at the time of connection can be suppressed.
2. When screwing the connection nut and joint body together, the tube is sandwiched between the fixing ring and the tube connection part of the joint body, and the tube is deformed to reduce the stress applied to the reduced diameter portion of the connection nut and to deform the tube. Therefore, according to this configuration, since the tube and the tube joint can be firmly connected, they do not come off due to pulling or shaking, and the fixing ring does not rotate together with the connecting nut. Leakage of fluid in the tube can be prevented without damaging the tube.
3. When screwing the coupling nut and the joint body, the effect of the fixing ring allows a suitable clamping force to be obtained simply by tightening without using a large force. A smooth flow of fluid in the inside can always be maintained.
4). By providing a fixing ring in the connection nut, the tube can be easily clamped by the fixing ring and the joint body when the connection nut and the joint body are screwed together, so that the structure of the tube joint can be simplified. Therefore, cost reduction can be achieved.
以下、添付図面を参照して本発明の好適な実施の形態を詳細に説明する。尚、下記実施例は、本発明の好適な実施の形態を示したものにすぎず、本発明の技術的範囲は、下記実施例そのものに何ら限定されるものではない。 Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, the following Example is only what showed the preferred embodiment of this invention, and the technical scope of this invention is not limited to the following Example itself at all.
図１は本発明の第１実施例におけるチューブとチューブ継手とを接続する前の状態を示す分解斜視図であり、図２は本発明の第１実施例におけるチューブとチューブ継手との接続作業の流れを示す側面断面図であり、図３は本発明の第１実施例におけるチューブとチューブ継手との接続作業の流れを示す他の側面断面図であり、図４は本発明の第１実施例におけるチューブとチューブ継手との接続作業の流れを示す更に他の側面断面図であり、図５は本発明の第１実施例におけるチューブとチューブ継手との接続状態を示す側面断面図であり、図６は本発明の第２実施例におけるチューブとチューブ継手との接続状態を示す側面断面図であり、図７は本発明の第３実施例におけるチューブとチューブ継手との接続状態を示す側面断面図であり、図８は本発明の第４実施例におけるチューブとチューブ継手との接続状態を示す側面断面図であり、図９は本発明の第５実施例におけるチューブとチューブ継手との接続状態を示す側面断面図である。 FIG. 1 is an exploded perspective view showing a state before connecting a tube and a tube joint in the first embodiment of the present invention, and FIG. 2 is a connection work of the tube and tube joint in the first embodiment of the present invention. FIG. 3 is a side sectional view showing a flow, FIG. 3 is another side sectional view showing a flow of connection work between a tube and a tube joint in the first embodiment of the present invention, and FIG. 4 is a first embodiment of the present invention. FIG. 5 is still another side sectional view showing the flow of connection work between the tube and the tube joint in FIG. 5, and FIG. 5 is a side sectional view showing a connection state between the tube and the tube joint in the first embodiment of the present invention. 6 is a side sectional view showing a connection state between the tube and the tube joint in the second embodiment of the present invention, and FIG. 7 is a side sectional view showing a connection state between the tube and the tube joint in the third embodiment of the present invention. And FIG. 8 is a side sectional view showing the connection state between the tube and the tube joint in the fourth embodiment of the present invention, and FIG. 9 is a side sectional view showing the connection state between the tube and the tube joint in the fifth embodiment of the present invention. FIG.
本発明に係るチューブとチューブ継手との接続方法は、チューブ継手（１）とチューブ（４０）とをしっかりと接続し、チューブ継手（１）によりチューブ（４０）を他の部材やチューブに接続する。尚、前記チューブ継手とチューブの素材としては、酸性、アルカリ性及び化学薬品に対して耐性を持つものであればよく、例えば、フッ素樹脂などの樹脂系材料を使用することができる。 The connection method of the tube and tube joint which concerns on this invention connects a tube joint (1) and a tube (40) firmly, and connects a tube (40) to another member and a tube with a tube joint (1). . In addition, as the raw material of the said tube coupling and a tube, what is resistant to acidity, alkalinity, and a chemical agent should just be used, For example, resin-type materials, such as a fluororesin, can be used.
以下、図１及び図５を参照して、本発明の第１実施形態についての説明を行う。該本発明の第１実施形態における前記チューブ継手（１）は、継手本体（１０）と、連結ナット（２０）と、少なくとも１つの固定リング（３０）とを含んでいる。 Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 and 5. The tube joint (1) in the first embodiment of the present invention includes a joint body (10), a connection nut (20), and at least one fixing ring (30).
前記継手本体（１０）は、前記継手本体（１０）の一端に設けられ、チューブ（４０）との接続を容易にするためのガイド斜面（１１１）が形成されているチューブ連結部（１１）と、前記チューブ連結部（１１）と反対する端部に形成されるねじ山部（１２）と、前記チューブ連結部（１１）に隣接し、前記チューブ連結部（１１）より外径が大きく、外周面にねじ山部が形成される螺合部（１３）と、軸方向に貫通する貫通孔（１４）と、中央部分に形成されるナット部（１５）とを含んでいる。 The joint body (10) is provided at one end of the joint body (10), and a tube connecting part (11) in which a guide slope (111) for facilitating connection with the tube (40) is formed. A threaded portion (12) formed at an end opposite to the tube connecting portion (11), and adjacent to the tube connecting portion (11) and having an outer diameter larger than that of the tube connecting portion (11). It includes a threaded portion (13) in which a thread portion is formed on the surface, a through hole (14) penetrating in the axial direction, and a nut portion (15) formed in the central portion.
前記連結ナット（２０）は、外周に形成されるナット部（２１）と、螺合孔（２２）とを含み、前記螺合孔（２２）の内周面における、前記チューブ連結部（１１）に近い一端に前記螺合部（１３）と螺合するねじ孔部（２２１）と、他端に当接面（２２４）を有する縮径部（２２３）と、前記ねじ孔部（２２１）と前記縮径部（２２３）との間に平滑孔部（２２２）とが形成されている。 The connecting nut (20) includes a nut portion (21) formed on the outer periphery and a screwing hole (22), and the tube connecting portion (11) on the inner peripheral surface of the screwing hole (22). A screw hole portion (221) screwed into the screwed portion (13) at one end close to the end, a reduced diameter portion (223) having a contact surface (224) at the other end, and the screw hole portion (221). A smooth hole portion (222) is formed between the reduced diameter portion (223).
前記固定リング（３０）は、当接端（３１）を有すると共に、前記螺合孔（２２）から嵌め込まれて当接面（２２４）に当接され、その硬さは、接続されるチューブ（４０）より硬く、その内径は、前記チューブ（４０）を挿入可能なサイズを有する。更に、前記当接端（３１）は、前記チューブ連結部（１１）とともに前記チューブ（４０）を挟持するが、その好適な角度範囲は、３０度〜９５度である。その主な理由としては、前記角度が３０度以下の場合、前記当接端が鋭角状となることから、厚さが足りず、十分な当接が得られなく、一方、前記角度が９５度以上の場合には、前記チューブ連結部（１１）とともに前記チューブ（４０）を挟持する際に、接触面積及び押圧力が不足し、十分な効果が得られないからである。 The fixing ring (30) has a contact end (31) and is fitted from the screw hole (22) to contact the contact surface (224). 40) It is harder and its inner diameter is sized to allow the tube (40) to be inserted. Furthermore, although the said contact end (31) clamps the said tube (40) with the said tube connection part (11), the suitable angle range is 30 degree | times-95 degree | times. The main reason for this is that when the angle is 30 degrees or less, the abutting end becomes an acute angle, so that the thickness is insufficient and sufficient abutment cannot be obtained, while the angle is 95 degrees. In the above case, when the tube (40) is clamped together with the tube connecting portion (11), the contact area and the pressing force are insufficient, and a sufficient effect cannot be obtained.
以下、図６を参照して、本発明の第２実施形態についての説明を行う。該本発明の第２実施形態における前記連結ナット（２０）には、その内周面における、前記チューブ連結部（１１）に近い一端に前記螺合部（１３）と螺合するねじ孔部（２２１）と、他端に当接面（２２４）を有する縮径部（２２３）が形成されるだけであり、第１実施形態のように、前記ねじ孔部（２２１）と前記縮径部（２２３）との間に平滑孔部（２２２）は形成されていない。尚、それ以外の部分の構造については、すべて前記第１実施形態と同様であるので、その説明を省略する。 Hereinafter, the second embodiment of the present invention will be described with reference to FIG. In the connection nut (20) according to the second embodiment of the present invention, a screw hole portion (15) that is threadedly engaged with the threaded portion (13) at one end of the inner peripheral surface close to the tube connecting portion (11). 221) and a reduced diameter portion (223) having an abutment surface (224) at the other end, and the screw hole portion (221) and the reduced diameter portion ( 223) is not formed with a smooth hole (222). Since the structure of other parts is the same as that of the first embodiment, the description thereof is omitted.
次に、図７を参照して、本発明の第３実施形態についての説明を行う。該本発明の第３実施形態における前記継手本体（１０）は、螺合部（１３）を含む第１本体（１０Ａ）と第２本体（１０Ｂ）とからなり、前記第１本体（１０Ａ）の一端内部に拡径組合せ穴（１０１Ａ）が形成され、前記拡径組合せ穴（１０１Ａ）にチューブ連結部（１１）を含む第２本体（１０Ｂ）の一端が挿入され、前記チューブ連結部（１１）の外周面と前記拡径組合せ穴（１０１Ａ）の内周面とは密着状態となっている。即ち、前記チューブ（４０）は、第１本体（１０Ａ）と第２本体（１０Ｂ）との間には位置していない。尚、それ以外の部分の構造については、すべて前記第１実施形態と同様であるので、その説明を省略する。 Next, the third embodiment of the present invention will be described with reference to FIG. The joint main body (10) according to the third embodiment of the present invention includes a first main body (10A) including a screwing portion (13) and a second main body (10B), and the first main body (10A). An enlarged diameter combination hole (101A) is formed inside one end, and one end of the second main body (10B) including the tube connection portion (11) is inserted into the enlarged diameter combination hole (101A), and the tube connection portion (11). And the inner peripheral surface of the enlarged diameter combination hole (101A) are in close contact with each other. That is, the tube (40) is not positioned between the first main body (10A) and the second main body (10B). Since the structure of other parts is the same as that of the first embodiment, the description thereof is omitted.
続いて、図８を参照して、本発明の第４実施形態についての説明を行う。該本発明の第４実施形態における前記継手本体（１０）は、螺合部（１３）を含む第１本体（１０Ａ）と第２本体（１０Ｂ）とからなり、前記第１本体（１０Ａ）の一端内部に拡径組合せ穴（１０１Ａ）が形成され、前記拡径該組合せ穴（１０１Ａ）にチューブ連結部（１１）を含む第２本体（１０Ｂ）の一端が挿入され、更に、前記チューブ連結部（１１）の外周面と前記拡径組合せ穴（１０１Ａ）の内周面との間にチューブ（４０）の厚みに相当する間隙が設けられる。即ち、前記チューブ（４０）は、第１本体（１０Ａ）と第２本体（１０Ｂ）との間に位置することになる。尚、それ以外の部分の構造については、すべて前記第３実施形態と同様であるので、その説明を省略する。 Subsequently, a fourth embodiment of the present invention will be described with reference to FIG. The joint main body (10) according to the fourth embodiment of the present invention includes a first main body (10A) including a screwing portion (13) and a second main body (10B). An enlarged diameter combination hole (101A) is formed inside one end, and one end of the second main body (10B) including the tube coupling portion (11) is inserted into the expanded diameter combination hole (101A), and further, the tube coupling portion A gap corresponding to the thickness of the tube (40) is provided between the outer peripheral surface of (11) and the inner peripheral surface of the enlarged diameter combination hole (101A). That is, the tube (40) is positioned between the first main body (10A) and the second main body (10B). Since the structure of other parts is the same as that of the third embodiment, the description thereof is omitted.
更に、図９に示すように、本発明の第５実施形態においては、２つの固定リング（３０）が設けられる構造であるが、それ以外の部分の構造については、すべて前記第１実施形態と同様であるので、その説明を省略する。 Furthermore, as shown in FIG. 9, in the fifth embodiment of the present invention, the two fixing rings (30) are provided. However, all other parts of the structure are the same as those in the first embodiment. Since it is the same, the description is abbreviate | omitted.
以下、図２乃至図４を参照して、本発明のチューブとチューブ継手との接続方法について説明する。 Hereinafter, with reference to FIG. 2 thru | or FIG. 4, the connection method of the tube of this invention and a tube coupling is demonstrated.
先ず、図２に示すように、チューブ（４０）の一端を連結ナット（２０）及び固定リング（３０）に通し、次に、図３に示すように、連結ナット（２０）を貫通したチューブ（４０）の端部にチューブ拡径部（４１）を形成し、継手本体（１０）のチューブ連結部（１１）を挿入し、そして、図４に示すように、前記連結ナット（２０）を回転させて締め込み、螺合部（１３）を固定リング（３０）に当接させる。 First, as shown in FIG. 2, one end of the tube (40) is passed through the connecting nut (20) and the fixing ring (30), and then, as shown in FIG. 3, the tube passing through the connecting nut (20) ( 40) forming an enlarged tube diameter portion (41) at the end, inserting the tube connecting portion (11) of the joint body (10), and rotating the connecting nut (20) as shown in FIG. Then, the screwing portion (13) is brought into contact with the fixing ring (30).
前記の手順により接続すると、前記連結ナット（２０）の内部に設けられる、硬さがチューブ（４０）をやや上回る固定リング（３０）により、前記連結ナット（２０）の端部に形成されている縮径部（２２３）を補強でき、且つ前記連結ナット（２０）の変形も防ぐことができる。 When connected by the above procedure, a fixing ring (30) having a hardness slightly higher than that of the tube (40) provided inside the connection nut (20) is formed at the end of the connection nut (20). The reduced diameter portion (223) can be reinforced and deformation of the connecting nut (20) can also be prevented.
また、本発明においては、前記連結ナット（２０）と継手本体（１０）とを螺合するとき、固定リング（３０）と継手本体（１０）のチューブ連結部（１１）でチューブ（４０）を挟持して、チューブ（４０）を変形させることにより、連結ナット（２０）における縮径部（２２３）の変形を防いでいる。故に、この構成によれば、チューブ継手（１）とチューブ（４０）とを強固に接続できることから、引っ張りや揺れにより外れることはなく、固定リング（３０）が連結ナット（２０）とともに回転することもないので、チューブ（４０）の周囲に環状の傷をつけることなく、チューブ（４０）内における流体の円滑な流れを常に保つことができる。 Moreover, in this invention, when the said connection nut (20) and a coupling main body (10) are screwed together, a tube (40) is fixed by the fixing ring (30) and the tube connection part (11) of a coupling main body (10). By sandwiching and deforming the tube (40), deformation of the reduced diameter portion (223) of the connecting nut (20) is prevented. Therefore, according to this configuration, since the tube joint (1) and the tube (40) can be firmly connected, the fixing ring (30) rotates together with the connecting nut (20) without being pulled out by pulling or shaking. Therefore, the smooth flow of the fluid in the tube (40) can always be maintained without causing an annular scratch around the tube (40).
更に、本発明の構成によれば、前記連結ナット（２０）と継手本体（１０）とを螺合するとき、大きな力を使わなくとも、弱い力で簡単に締め付けるだけで、好適な挟持力を得ることができるので、本体を変形させることなくチューブ（４０）内における流体の円滑な流れを常に保つことができる Furthermore, according to the configuration of the present invention, when the connecting nut (20) and the joint body (10) are screwed together, a suitable clamping force can be obtained by simply tightening with a weak force without using a large force. So that a smooth flow of fluid in the tube (40) can always be maintained without deforming the body.
更に、本発明の構成によれば、前記連結ナット（２０）内に固定リング（３０）を設けることで、前記連結ナット（２０）と継手本体（１０）とを螺合するときに、前記固定リング（３０）と継手本体（１０）によってチューブ（４０）を挟持することができることから、チューブ継手（１）の構造をより簡単にできるので、低コスト化を図ることができる。 Furthermore, according to the structure of this invention, when the said connection nut (20) and a coupling main body (10) are screwed together by providing a fixing ring (30) in the said connection nut (20), the said fixation Since the tube (40) can be clamped by the ring (30) and the joint body (10), the structure of the tube joint (1) can be simplified, and the cost can be reduced.
以下、本発明のチューブ継手と従来のチューブ継手との引張耐力の比較表を示す。 Hereinafter, a comparison table of tensile strength between the tube joint of the present invention and the conventional tube joint is shown.
前記比較表に示すように、本発明のチューブ継手は、いずれのサイズにおいても、従来のチューブ継手より優れた引張耐力を有するので、チューブとの接続効果をより高めることができる。 As shown in the comparison table, since the tube joint of the present invention has a tensile strength superior to that of the conventional tube joint in any size, the connection effect with the tube can be further enhanced.
本発明は上記の構成を有することから、連結ナットの端部に形成される縮径部を補強でき、且つ固定時の連結ナットの変形を防ぐことができると共に、チューブの周囲に環状の傷をつけることなく、チューブ内の流体の漏れを防止することができ、更に、チューブ内における流体の円滑な流れを常に保つことができ、その上、低コスト化を図ることができる。
Since the present invention has the above-described configuration, it is possible to reinforce the reduced diameter portion formed at the end portion of the connection nut, prevent deformation of the connection nut at the time of fixing, and form an annular scratch around the tube. Without being attached, leakage of the fluid in the tube can be prevented, and a smooth flow of the fluid in the tube can be always maintained, and in addition, the cost can be reduced.
１ チューブ継手
１０ 継手本体
１０Ａ 第１本体
１０Ｂ 第２本体
１０１Ａ 拡径組合せ穴
１１ チューブ連結部
１１１ ガイド斜面
１２ ねじ山部
１３ 螺合部
１４ 貫通孔
１５ ナット部
２０ 連結ナット
２１ ナット部
２２ 螺合孔
２２１ ねじ孔部
２２２ 平滑孔部
２２３ 縮径部
２２４ 当接面
３０ 固定リング
３１ 当接端
４０ チューブ
４１ チューブ拡径部
５０ 連結部
５１ 環状凸部
６０ 継手本体
７０ 連結ナット
７１ 圧接端部
８０ チューブ
８１ 端部
８２ 係合凹部
９０ クランプ
９１ 押圧部材
６０ａ 継手本体
７０ａ 連結ナット
８０ａ チューブ
DESCRIPTION OF
Claims (11)
内部に螺合孔（２２）が形成され、該螺合孔（２２）の一端に当接面（２２４）を有する縮径部（２２３）が形成される連結ナット（２０）と、
前記連結ナット（２０）の内部に嵌め込まれて、当接面（２２４）に当接される固定リング（３０）と、
を含む樹脂製のチューブ継手（１）を、樹脂製のチューブ（４０）の端部に接続する方法において、
前記チューブ（４０）の一端を、前記連結ナット（２０）及び前記固定リング（３０）に貫入し、
前記連結ナット（２０）に貫入された前記チューブ（４０）の端部に、チューブ拡径部（４１）を形成し、前記継手本体（１０）の前記チューブ連結部（１１）を挿入し、
前記連結ナット（２０）を回転させながら、前記チューブ連結部（１１）を前記固定リング（３０）に当接させる、
ことを特徴とするチューブ継手とチューブとの接続方法。 A hollow joint body (10) including a tube connecting part (11) and a threaded part (13);
A connection nut (20) having a reduced diameter portion (223) formed therein with a threaded hole (22) and having a contact surface (224) at one end of the threaded hole (22);
A fixing ring (30) fitted into the coupling nut (20) and abutted against the abutment surface (224);
In the method of connecting the resin tube joint (1) including the end of the resin tube (40),
One end of the tube (40) penetrates the connecting nut (20) and the fixing ring (30),
At the end of the tube (40) penetrated into the connection nut (20), a tube diameter-expanded portion (41) is formed, and the tube connection portion (11) of the joint body (10) is inserted,
While rotating the connecting nut (20), the tube connecting portion (11) is brought into contact with the fixing ring (30).
A connection method between a tube joint and a tube, characterized in that.
内部に前記チューブ連結部（１１）が挿入されると共に、前記螺合部（１３）と螺合する螺合孔（２２）が形成され、前記螺合孔（２２）の一端に、当接面（２２４）を有する縮径部（２２３）が形成される連結ナット（２０）と、
前記連結ナット（２０）の内部の螺合孔（２２）内に設けられ、当接面（２２４）に当接される少なくとも１つの固定リング（３０）と、を含み、
前記固定リング（３０）の硬さは、接続されるチューブ（４０）より硬いことを特徴とするチューブ継手。 A tube connecting portion (11) is provided at one end, and includes a screwed portion (13) having an outer diameter larger than that of the tube connecting portion (11) and having a threaded portion formed on the outer peripheral surface. A joint body (10) formed with
The tube connecting portion (11) is inserted therein, and a screwing hole (22) is formed to be screwed with the screwing portion (13). A contact surface is formed at one end of the screwing hole (22). A connecting nut (20) in which a reduced diameter portion (223) having (224) is formed;
At least one fixing ring (30) provided in a screw hole (22) inside the coupling nut (20) and abutted against the abutment surface (224);
The tube joint according to claim 1, wherein the fixing ring (30) is harder than the tube (40) to be connected.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW096147144A TW200823396A (en) | 2007-12-11 | 2007-12-11 | Method for preventing from separation between tube and joint and a joint thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2009144916A true JP2009144916A (en) | 2009-07-02 |
Family
ID=40915717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008295515A Pending JP2009144916A (en) | 2007-12-11 | 2008-11-19 | Connection method of tube and tube joint, and tube joint |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2009144916A (en) |
| TW (1) | TW200823396A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014013994A1 (en) * | 2012-07-17 | 2014-01-23 | ダイキン工業株式会社 | Coupling and coupling assembly |
| JP2014122707A (en) * | 2012-07-17 | 2014-07-03 | Daikin Ind Ltd | Female member for coupler |
| CN104121434A (en) * | 2013-04-25 | 2014-10-29 | 和正丰科技股份有限公司 | Pipe joint for preventing pipe fitting and pipe joint from loosening |
| JP5858195B1 (en) * | 2014-09-05 | 2016-02-10 | ダイキン工業株式会社 | Fittings and fitting assemblies |
| CN107377281A (en) * | 2017-08-21 | 2017-11-24 | 厦门雾天下信息科技有限公司 | A kind of pipe-line system for terminating machine of spraying |
| KR101842448B1 (en) * | 2017-08-18 | 2018-03-27 | 주식회사 이앤아이비 | Fitting for Dual-layer Tube with Enhanced Seal Structure |
| KR101842173B1 (en) * | 2017-08-18 | 2018-05-14 | 주식회사 이앤아이비 | Fitting for Tube with Enhanced Seal Structure |
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| CN114151639A (en) * | 2021-11-27 | 2022-03-08 | 潍坊中石科技有限公司 | PE pipe, production method of PE pipe and steel-plastic adapter adopting PE pipe |
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|---|---|---|---|---|
| KR101634507B1 (en) * | 2012-07-17 | 2016-06-28 | 다이킨 고교 가부시키가이샤 | Coupling and coupling assembly |
| JP2014122707A (en) * | 2012-07-17 | 2014-07-03 | Daikin Ind Ltd | Female member for coupler |
| JPWO2014013994A1 (en) * | 2012-07-17 | 2016-07-07 | 西尾 清志 | Fittings and fitting assemblies |
| KR20150031450A (en) | 2012-07-17 | 2015-03-24 | 다이킨 고교 가부시키가이샤 | Coupling and coupling assembly |
| WO2014013994A1 (en) * | 2012-07-17 | 2014-01-23 | ダイキン工業株式会社 | Coupling and coupling assembly |
| CN104121434B (en) * | 2013-04-25 | 2016-08-31 | 和正丰科技股份有限公司 | Pipe joint for preventing pipe fitting and pipe joint from loosening |
| KR20140130366A (en) * | 2013-04-25 | 2014-11-10 | 부에노 테크놀러지 코., 엘티디. | Method and structure for preventing slipping-off a tube in a pipe joint made of fluororesin |
| CN104121434A (en) * | 2013-04-25 | 2014-10-29 | 和正丰科技股份有限公司 | Pipe joint for preventing pipe fitting and pipe joint from loosening |
| KR101630917B1 (en) * | 2013-04-25 | 2016-06-15 | 부에노 테크놀러지 코., 엘티디. | Method and structure for preventing slipping-off a tube in a pipe joint made of fluororesin |
| JP5858195B1 (en) * | 2014-09-05 | 2016-02-10 | ダイキン工業株式会社 | Fittings and fitting assemblies |
| WO2016035834A1 (en) * | 2014-09-05 | 2016-03-10 | ダイキン工業株式会社 | Joint and joint assembly |
| KR20170034440A (en) | 2014-09-05 | 2017-03-28 | 다이킨 고교 가부시키가이샤 | Joint and joint assembly |
| US9851031B2 (en) | 2014-09-05 | 2017-12-26 | Daikin Industries, Ltd. | Joint and joint assembly |
| KR101842448B1 (en) * | 2017-08-18 | 2018-03-27 | 주식회사 이앤아이비 | Fitting for Dual-layer Tube with Enhanced Seal Structure |
| KR101842173B1 (en) * | 2017-08-18 | 2018-05-14 | 주식회사 이앤아이비 | Fitting for Tube with Enhanced Seal Structure |
| CN107377281A (en) * | 2017-08-21 | 2017-11-24 | 厦门雾天下信息科技有限公司 | A kind of pipe-line system for terminating machine of spraying |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200823396A (en) | 2008-06-01 |
| TWI335395B (en) | 2011-01-01 |
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