JP2007239921A

JP2007239921A - Pipe joint device

Info

Publication number: JP2007239921A
Application number: JP2006064532A
Authority: JP
Inventors: Makoto Yoshino; 誠吉野
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2006-03-09
Filing date: 2006-03-09
Publication date: 2007-09-20

Abstract

<P>PROBLEM TO BE SOLVED: To realize a pipe joint device capable of suppressing slanted insertion assembly, and capable of preventing a leakage defect in a seal part. <P>SOLUTION: The pipe joint device connects a first pipe member 2 having a male side joint part 22, and a second pipe member 3 having a female side joint part 32 fitting on the male side joint part 22. It is provided with an extension tube part 37 extending from the female side joint part 32 toward a first pipe member 2 side, and a fastening member 24 annularly formed to protrude outward in a root part of the male side joint part 22, and fitting in the extension tube part 37. A fitting clearance in one of an outer diameter of the fastening member 24 and an inner diameter of the extension tube part 37 is about 0.25mm or less. By this, slanted insertion assembly can be suppressed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、雄側継手を有する流体用配管部材と雌側継手を有する流体用配管部材とを接続する配管継手装置に関するものであり、例えば、車両空調用冷凍サイクルの冷媒用配管部材の配管継手装置に用いて好適なものである。 The present invention relates to a pipe joint device for connecting a fluid pipe member having a male side joint and a fluid pipe member having a female side joint, for example, a pipe joint of a refrigerant pipe member of a refrigeration cycle for vehicle air conditioning. It is suitable for use in an apparatus.

従来、この種の配管継手装置として、例えば、特許文献１のように、雄側継手を有する第１配管部材と、雌側継手を有する第２配管部材と、筒状に形成された本体の一端から軸心に向けて突出する複数の第１係止部が形成された配管継手と、第２配管部材の端末に第１配管部材に向かって延設された延設筒部と、その延設筒部に円周方向に沿って第１係止部に係合可能な窓部とを備えている。 Conventionally, as this type of pipe joint device, for example, as in Patent Document 1, a first pipe member having a male side joint, a second pipe member having a female side joint, and one end of a main body formed in a cylindrical shape A pipe joint in which a plurality of first locking portions projecting from the shaft toward the shaft center are formed, an extended cylinder portion extended toward the first pipe member at the end of the second pipe member, and the extension The tube portion is provided with a window portion engageable with the first locking portion along the circumferential direction.

そして、その窓部に第１係止部を挿入して配管継手を第２配管部材に装着させ、その第２配管部材の雌側継手に第１配管部材の雄側継手を挿入することで、第１係止部が拡径、縮径によって第１配管部材と第２配管部材とをワンタッチで固定するようになっている。
特開２００５−１５５７６６号公報 And by inserting the first locking part into the window part and mounting the pipe joint on the second pipe member, by inserting the male side joint of the first pipe member into the female side joint of the second pipe member, A 1st latching | locking part fixes a 1st piping member and a 2nd piping member by one-touch by diameter expansion and a diameter reduction.
JP 2005-155766 A

しかしながら、その後の発明者の検討によると、上記特許文献１のような構成では、例えば、図７に示すように、第２配管部材３の雌側継手３２に第１配管部材２の雄側継手２２を嵌入して組み付けるときに、第１配管部材２を傾けて斜め挿入すると、雄側継手２２の先端で雌側継手３２の内面を擦ることによって、Ｏリング５のシール面であるシール部を傷付けて、最悪冷媒洩れの恐れがあることを見出した。 However, according to the inventors' subsequent studies, in the configuration as in Patent Document 1, for example, as shown in FIG. 7, the female side joint 32 of the second piping member 3 is connected to the male side joint of the first piping member 2. When the first piping member 2 is tilted and inserted obliquely when inserting and assembling 22, the seal portion which is the seal surface of the O-ring 5 is rubbed against the inner surface of the female side joint 32 by the tip of the male side joint 22. It was found that there was a risk of the worst refrigerant leaking.

さらに、延設筒部３７内に配設される膨拡部２４の外径と延設筒部３７の内径との嵌め合いすきまであるクリアランスが大きいと、エンジンや圧縮機の振動、振幅が冷媒配管を通じて継手部に伝わり、雄側継手２２と雌側継手３２との間に、相対的な動き、傾きが発生することで、最悪はシール部からの冷媒洩れの懸念があることを併せて見出した。 Further, if the clearance between the outer diameter of the expanding portion 24 disposed in the extending cylinder portion 37 and the inner diameter of the extending cylinder portion 37 is large, the vibration and amplitude of the engine and the compressor are reduced. It is transmitted to the joint portion through the pipe, and relative movement and inclination are generated between the male side joint 22 and the female side joint 32, so that the worst is that there is a concern of refrigerant leakage from the seal portion. It was.

そこで、本発明の目的は、斜め挿入の組み付けを抑制できるとともにシール部の洩れ不良を防止することができる配管継手装置を提供することにある。 Accordingly, an object of the present invention is to provide a pipe joint device that can suppress the assembly of oblique insertion and can prevent a leakage failure of a seal portion.

上記目的を達成するために、請求項１ないし請求項６に記載の技術的手段を採用する。すなわち、請求項１に記載の発明では、雄側継手（２２）を有する第１配管部材（２）と、雄側継手（２２）が嵌入される雌側継手（３２）を有する第２配管部材（３）とを接続する配管継手装置において、
第２配管部材（３）の端末に形成され、第１配管部材（２）側に向かって雌側継手（３２）から延設する延設筒部（３７）と、雄側継手（２２）の根元部に外方へ環状に突出形成され、延設筒部（３７）に嵌入する膨拡部（２４）とを備え、
膨拡部（２４）の外径と延設筒部（３７）の内径との片側の嵌合すきまが約０．２５ｍｍ以下であることを特徴としている。 In order to achieve the above object, the technical means described in claims 1 to 6 are employed. That is, in the first aspect of the present invention, the first piping member (2) having the male side joint (22) and the second piping member having the female side joint (32) into which the male side joint (22) is inserted. (3) In the pipe joint device connecting
An extended tube portion (37) formed at the end of the second piping member (3) and extending from the female side joint (32) toward the first piping member (2) side, and a male side joint (22) The base part is formed to project outwardly in an annular shape, and has an expanded part (24) fitted into the extended cylinder part (37),
The fitting clearance on one side of the outer diameter of the expanded portion (24) and the inner diameter of the extended cylindrical portion (37) is about 0.25 mm or less.

この発明によれば、雄側継手（２２）と雌側継手（３２）とが嵌め合う嵌合部の他に、延設筒部（３７）と膨拡部（２４）とが嵌め合うことで、第２配管部材（３）に第１配管部材（２）を組み付けるときに、二重の案内部が形成されることで、斜め挿入の組付けを抑制できる。従って、組付斜角を小さくすることができる。 According to this invention, in addition to the fitting part in which the male side joint (22) and the female side joint (32) are fitted, the extended cylinder part (37) and the expanded part (24) are fitted together. When the first piping member (2) is assembled to the second piping member (3), the double guide portion is formed, thereby suppressing the oblique insertion. Therefore, the assembly oblique angle can be reduced.

また、嵌合すきまが約０．２５ｍｍ以下であれば、組付け後の振動などによる雄側継手（２２）と雌側継手（３２）とが嵌め合う嵌合部における傾きが低減する。これにより、組付け後のシール部の洩れ不良を防止することができる。 If the fitting clearance is about 0.25 mm or less, the inclination at the fitting portion where the male side joint (22) and the female side joint (32) are fitted due to vibration after assembly or the like is reduced. Thereby, the leakage defect of the seal part after an assembly can be prevented.

請求項２に記載の発明では、第１配管部材（２）は、雌側継手（３２）に嵌入される雄側継手（２２）の長さが約９ｍｍ以上であることを特徴としている。この発明によれば、雄側継手（２２）が約９ｍｍ以上であれば、第２配管部材（３）に第１配管部材（２）を組み付けるときに、より具体的に組付斜角が最大約２°未満となって、雄側継手（２２）によるシール部への傷つきが低減される。これにより、シール部の洩れ不良を防止することができる。 In the invention described in claim 2, the first piping member (2) is characterized in that the length of the male side joint (22) inserted into the female side joint (32) is about 9 mm or more. According to the present invention, when the male joint (22) is about 9 mm or more, when the first piping member (2) is assembled to the second piping member (3), the assembling oblique angle is more specifically maximized. It becomes less than about 2 degrees, and the damage to the seal part by the male side joint (22) is reduced. Thereby, the leakage defect of a seal part can be prevented.

請求項３に記載の発明では、膨拡部（２４）は、嵌合部の長さが約２．５ｍｍ以上であることを特徴としている。この発明によれば、延設筒部（３７）と膨拡部（２４）とが嵌め合う嵌合部が、雄側継手（２２）と雌側継手（３２）とが嵌め合う嵌合部の他に、少なくとも２番目の案内部として形成することができる。 The invention according to claim 3 is characterized in that the expansion portion (24) has a length of the fitting portion of about 2.5 mm or more. According to this invention, the fitting part in which the extended cylinder part (37) and the expansion part (24) are fitted is the fitting part in which the male side joint (22) and the female side joint (32) are fitted. Alternatively, it can be formed as at least a second guide.

請求項４に記載の発明では、膨拡部（２４）は、別体からなり、第１配管部材（２）の外周に固定されていることを特徴としている。この発明によれば、従来は膨拡部（２４）をバルジ加工によって第１配管部材（２）に一体成形で形成していたが、これに限らず、別体で形成した膨拡部（２４）を第１配管部材（２）に、拡管加工によって配設することで製造コストを高めることなく形成できる。 The invention according to claim 4 is characterized in that the expansion portion (24) is a separate body and is fixed to the outer periphery of the first piping member (2). According to the present invention, the expansion portion (24) has been conventionally formed integrally with the first piping member (2) by bulge processing. However, the present invention is not limited to this, and the expansion portion (24) formed separately. ) On the first piping member (2) by pipe expansion processing without increasing the manufacturing cost.

請求項５に記載の発明では、延設筒部（３７）は、別体からなり、雌側継手（３２）の外周に配設されていることを特徴としている。この発明によれば、従来は延設筒部（３７）を口拡加工によって第２配管部材（３）に一体成形で形成していたが、これに限らず、別体で形成した延設筒部（３７）を第２配管部材（３）に配設することで製造コストを高めることなく形成できる。 The invention according to claim 5 is characterized in that the extending cylindrical portion (37) is a separate body and is disposed on the outer periphery of the female side joint (32). According to the present invention, the extended tube portion (37) has been conventionally formed integrally with the second piping member (3) by magnifying, but the present invention is not limited to this, and the extended tube formed separately. By disposing the part (37) in the second piping member (3), it can be formed without increasing the manufacturing cost.

請求項６に記載の発明では、筒状に形成された本体の一端から軸心に対して等間隔の位置に形成され、それぞれ端面から延設する複数の第１溝部（１２）、および本体の両端部における、第１溝部（１２）が形成されていない円周上の第１薄肉部（１１）に形成され、軸心に向けて突出する複数の拡径・縮径可能な第１係止部（１４）を有する配管継手（１０）と、延設筒部（３７）の円周方向に沿って形成され、第１係止部（１４）に係合可能な窓部（３８）とを備え、配管継手（１０）は、窓部（３８）に第１係止部（１４）が装着されていることを特徴としている。 In the invention according to claim 6, a plurality of first grooves (12) formed at equal intervals from the one end of the main body formed in a cylindrical shape with respect to the axial center, respectively extending from the end face, and the main body A plurality of first locking members that are formed at the first thin-walled portion (11) on the circumference where the first groove portion (12) is not formed at both ends and project toward the shaft center and can be expanded and contracted. A pipe joint (10) having a portion (14), and a window portion (38) formed along the circumferential direction of the extending tube portion (37) and engageable with the first locking portion (14). The pipe joint (10) is characterized in that the first locking part (14) is attached to the window part (38).

この発明によれば、窓部（３８）に装着された配管継手（１０）の第１係止部（１４）は拡径、縮径することで、第１配管部材（２）と第２配管部材（３）とがワンタッチで固定できる配管継手（１０）に、本発明を適用させることで組付け時の生産性の向上が図れるとともにシール部の傷つき不良の低減が図れる。 According to this invention, the 1st piping member (2) and 2nd piping are carried out by diameter-expanding the 1st latching | locking part (14) of the piping joint (10) with which the window part (38) was mounted | worn. By applying the present invention to the pipe joint (10) that can be fixed to the member (3) with a single touch, the productivity at the time of assembling can be improved and the flawed damage of the seal portion can be reduced.

なお、上記各手段の括弧内の符号は、後述する実施形態の具体的手段との対応関係を示すものである。 In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.

（第１実施形態）
以下、本発明の第１実施形態による配管継手装置を図１ないし図４に基づいて説明する。図１は本発明を車両空調用冷凍サイクルの冷媒配管に適用したもので、第１配管部材２を第２配管部材３に挿入する前の形態を示す断面図であり、図２は配管継手装置の全体構成を示す部分断面図である。 (First embodiment)
Hereinafter, a pipe joint device according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view showing a form before the first piping member 2 is inserted into a second piping member 3 in which the present invention is applied to a refrigerant piping of a refrigeration cycle for vehicle air conditioning. FIG. It is a fragmentary sectional view which shows the whole structure.

また、図３は被係止部材２４の全体構成を示す（ａ）は側面図、（ｂ）は図３（ａ）に示すＡ−Ａ断面図である。図４は配管継手である第１係止部材１０の全体構成を示す（ａ）は側面図、（ｂ）は部分断面図である。 3A and 3B are side views, and FIG. 3B is a cross-sectional view taken along line AA shown in FIG. FIG. 4A is a side view and FIG. 4B is a partial cross-sectional view showing the overall configuration of the first locking member 10 that is a pipe joint.

本実施形態の配管継手装置は、図１および図２に示すように、雄側継手を有する第１配管部材２を、雌側継手を有する第２配管部材３に雄側継手を挿入して接続し、第２配管部材３に装着された配管継手である第１係止部材１０で第２配管部材３に形成された窓部３８を介して第１配管部材２を係止するように構成されている。 As shown in FIGS. 1 and 2, the pipe joint device of the present embodiment connects the first pipe member 2 having the male side joint by inserting the male side joint into the second pipe member 3 having the female side joint. In addition, the first piping member 2 is configured to be locked via the window 38 formed in the second piping member 3 by the first locking member 10 that is a pipe joint attached to the second piping member 3. ing.

第１配管部材２は、冷媒を流通するために筒状に形成され、挿入側先端部が筒部２１より拡径された雄側の継手部（雄側継手）２２として形成されている。この継手部２２には、気密部材であるＯリング５が嵌入される溝２３が形成されるとともに、その溝２３の反先端部側に略円筒状に形成された膨拡部である被係止部材２４が配設されている。 The first piping member 2 is formed in a cylindrical shape so as to circulate the refrigerant, and is formed as a male joint portion (male side joint) 22 whose insertion side distal end portion has a diameter larger than that of the cylindrical portion 21. The joint portion 22 is formed with a groove 23 into which the O-ring 5 that is an airtight member is inserted, and is a locked portion that is an expanded portion formed in a substantially cylindrical shape on the opposite end side of the groove 23. A member 24 is disposed.

この被係止部材２４は後述する第１係止部材１０の第１係止部１４に係止されるための部材であって、第１配管部材２とは別体で形成して第１配管部材２の継手部２２の根元部外周に配設されている。 The locked member 24 is a member to be locked to a first locking portion 14 of the first locking member 10 to be described later, and is formed separately from the first piping member 2 to form the first piping. The joint 2 of the member 2 is disposed on the outer periphery of the root portion.

より具体的な形状は、図３（ａ）および図３（ｂ）に示すように、外形が軸心に対し外方へ環状に突出する膨拡状からなる略円筒状の断面形状で形成するとともに、一端面に後述する第１係止部材１０の第１係止部１４に係止されるための凹状の溝部２６ｂを円周方向に４箇所に形成している。 More specifically, as shown in FIGS. 3 (a) and 3 (b), the outer shape is formed in a substantially cylindrical cross-sectional shape having an expanded shape projecting annularly outward with respect to the shaft center. At the same time, concave groove portions 26b to be engaged with a first engagement portion 14 of the first engagement member 10, which will be described later, are formed at four locations in the circumferential direction.

溝部２６ｂは、第１係止部１４が係止したときに、円周方向に回転しないように第１係止部１４が係合する略同一寸法の幅寸法で形成している。また、図中に示す２５は、テーパー外面であって、このテーパー外面２５が後述する第２配管部材２のテーパー内面３４に当接するように形成している。 The groove portion 26b is formed with a substantially same width that the first locking portion 14 engages so as not to rotate in the circumferential direction when the first locking portion 14 is locked. Reference numeral 25 in the figure denotes a tapered outer surface, and this tapered outer surface 25 is formed so as to abut on a tapered inner surface 34 of the second piping member 2 described later.

なお、被係止部材２４は、アルミニウム、鉄などの金属材料を用いた鍛造、ダイキャスト、プレス成形、または切削加工のいずれかで形成しても良い。また、樹脂材料を用いた成形品で形成しても良い。また、ここでは、被係止部材２４をその断面形状を略円筒状に形成したが、これに限らず、略楕円状や多角形状に形成しても良い。 The locked member 24 may be formed by any of forging, die casting, press molding, or cutting using a metal material such as aluminum or iron. Moreover, you may form by the molded article using a resin material. Moreover, although the to-be-latched member 24 was formed in the substantially cylindrical shape here, not only this but it may form in a substantially elliptical shape or a polygonal shape.

そして、別体の被係止部材２４を第１配管部材２に固定するには、例えば、第１配管部材２の内周部を拡管する拡管加工、もしくは被係止部材２４を第１配管部材２の外周に圧入する圧入加工で固定させても良い。また、この他に接着、溶接、ろう付けのいずれかの固定方法で第１配管部材２に被係止部材２４を固定しても良い。 And in order to fix the separate to-be-latched member 24 to the 1st piping member 2, for example, the pipe expansion process which expands the inner peripheral part of the 1st piping member 2, or the to-be-latched member 24 is the 1st piping member. You may fix by press-fitting which press-fits to the outer periphery of 2. In addition, the locked member 24 may be fixed to the first piping member 2 by any fixing method such as adhesion, welding, or brazing.

一方、第２配管部材３は、冷媒を流通するために筒状に形成され、挿入側先端部が筒部３１より拡径された雌側の継手部（雌側継手）３２として形成されている。この継手部３２には、第１配管部材２の継手部２２を内嵌する挿入口３３と、第１配管部材２のテーパー外面２５に当接するテーパー内面３４を有する挿入口先端膨拡部３５を形成しているとともに、この挿入口先端膨拡部３５から前方に延設した延設筒部３７を形成し、この延設筒部３７に軸心に対して対向する位置に一対の窓部３８が形成している。 On the other hand, the second piping member 3 is formed in a cylindrical shape so as to circulate the refrigerant, and is formed as a female-side joint portion (female-side joint) 32 in which the insertion-side distal end is larger in diameter than the cylindrical portion 31. . The joint portion 32 includes an insertion port 33 into which the joint portion 22 of the first piping member 2 is fitted, and an insertion port tip expanding portion 35 having a tapered inner surface 34 that abuts against the tapered outer surface 25 of the first piping member 2. In addition, an extended tube portion 37 is formed extending forward from the insertion port distal end expanding portion 35, and a pair of window portions 38 are formed at positions facing the extended tube portion 37 with respect to the axial center. Has formed.

ここで、延設筒部３７の外径は挿入口先端膨拡部３５の外径と略同径に形成されている。なお、窓部３８には、詳しくは後述する第１係止部材１０の第１係止部１４が差し込まれるようにしている。 Here, the outer diameter of the extended cylindrical portion 37 is formed to be substantially the same as the outer diameter of the insertion port distal end expanding portion 35. In addition, the 1st latching | locking part 14 of the 1st latching member 10 mentioned later in detail is inserted in the window part 38. As shown in FIG.

次に、配管継手である第１係止部材１０は、図４（ａ）および図４（ｂ）に示すように、樹脂材料、または金属材料、あるいは樹脂材料と金属材料とを混合させた材料を用いて、半割れ形状で形成し成形加工により一体的に成形して軸方向および径方向に弾性を有して形成されている。 Next, as shown in FIG. 4A and FIG. 4B, the first locking member 10 that is a pipe joint is a resin material, a metal material, or a material obtained by mixing a resin material and a metal material. Are formed in a half-cracked shape, and are integrally formed by a molding process so as to have elasticity in the axial direction and the radial direction.

ここで、上記半割れ形状は、図３（ａ）に示すように、２分割された第１係止部材１０の一端が弾力的に連結するとともに、他端が分割された第１係止部材１０を開閉可能に形成した形状である。 Here, as shown in FIG. 3 (a), the half-cracked shape is such that the first locking member 10 is elastically connected at one end of the first locking member 10 divided into two and the first locking member is divided at the other end. It is the shape which formed 10 so that opening and closing was possible.

因みに、図中に示す１８は弾力的に連結させた蝶番部１８であり、この蝶番部１８と軸心に対して対向する部位に係合部１７が形成されている。係合部１７は、一端がフック状の凸部１７ａと、他端がこの凸部１７ａに係合する凹部１７ｂが形成されて着脱可能に構成している。これにより、第１係止部材１０は、半割れ状に開いた形態から第２配管部材３の外周面を挟むように装着することができる。 Incidentally, 18 shown in the figure is a hinge portion 18 that is elastically connected, and an engaging portion 17 is formed at a portion facing the hinge portion 18 with respect to the axis. The engaging portion 17 has a hook-shaped convex portion 17a at one end and a concave portion 17b that engages with the convex portion 17a at the other end, and is configured to be detachable. Thereby, the 1st latching member 10 can be mounted | worn so that the outer peripheral surface of the 2nd piping member 3 may be pinched | interposed from the form opened in the half crack shape.

係合部１７を係合することでリング状に形成された第１係止部材１０は、薄肉のリング状に形成され、リング状の第１薄肉部である第１本体リング部１１の一端から端面を開口した溝部がそれぞれ円周上の対称位置に配置されて第１溝部１２が形成されている。 The first locking member 10 formed in a ring shape by engaging the engaging portion 17 is formed in a thin ring shape, from one end of the first main body ring portion 11 which is the ring-shaped first thin portion. The first groove portion 12 is formed by arranging the groove portions having the open end faces at symmetrical positions on the circumference.

第１溝部１２は、図４（ｂ）に示すように、第１本体リング部１１の左端から右端近傍まで延設して形成され、左端を開口している。そして、この第１溝部１２は第１本体リング部１１の軸心に対して対称位置に対向するように一対形成されている。 As shown in FIG. 4B, the first groove portion 12 is formed to extend from the left end of the first main body ring portion 11 to the vicinity of the right end, and opens the left end. A pair of the first groove portions 12 are formed so as to face symmetrical positions with respect to the axis of the first main body ring portion 11.

そして、第１本体リング部１１の両端部における溝部が形成されていない薄肉部１１には、軸心に向かって突出する第１係止部１４が形成されている。この第１係止部１４は、第１溝部１２が形成されていない第１本体リング部１１の薄肉端部１１ａから第１溝部１２を挟んで両側に一組配置されるとともに、軸心に向かって突き出して対称位置に対向するように一組の第１係止部１４が形成されている。 A first locking portion 14 that protrudes toward the axial center is formed in the thin portion 11 where the groove portions at both ends of the first main body ring portion 11 are not formed. The first locking portion 14 is disposed on both sides of the first groove portion 12 from the thin end portion 11a of the first main body ring portion 11 where the first groove portion 12 is not formed, and is directed toward the axial center. A pair of first locking portions 14 is formed so as to protrude and face the symmetrical position.

さらに、一組の第１係止部１４には、円周上の中間位置に溝部１３を形成して２分割して、円周上に４個の第１係止部１４が形成されている。そして、それぞれの第１係止部１４には、内周面に直線部１４ａと、この直線部１４ａから端面に向かって大径となるテーパー面部１４ｂと、テーパー面部１４ｂの末端に突出部１４ｃとを形成している。 Furthermore, in the set of first locking portions 14, a groove portion 13 is formed at an intermediate position on the circumference and divided into two, and four first locking portions 14 are formed on the circumference. . Each of the first locking portions 14 includes a linear portion 14a on the inner peripheral surface, a tapered surface portion 14b having a large diameter from the linear portion 14a toward the end surface, and a protruding portion 14c at the end of the tapered surface portion 14b. Is forming.

この突出部１４ｃは、図２に示すように、第１配管部材２と第２配管部材３とが接続された後に、第１、第２配管部材２、３内に流体が封入されて内部圧力が高いときは、突出部１４ｃの先端側に突き出た外周面が延設筒部３７の内周側と当接することで第１係止部１４が窓部３８に係止されるように形成している。 As shown in FIG. 2, the protruding portion 14 c is configured such that after the first piping member 2 and the second piping member 3 are connected, a fluid is sealed in the first and second piping members 2 and 3, and the internal pressure is increased. When the height is high, the outer peripheral surface protruding to the distal end side of the projecting portion 14c is in contact with the inner peripheral side of the extending cylindrical portion 37 so that the first locking portion 14 is locked to the window portion 38. ing.

また、図中に示す１４ｅは第１係止部１４の爪部であって凸状に形成しており、この爪部１４ｅが被係止部材２４に形成された溝部２６ｂを係止することで、第１配管部材２と第２配管部材３とが接続されるとともに、第１配管部材２と第２配管部材３との円周方向への回り止めが図れる。 Further, 14e shown in the drawing is a claw portion of the first locking portion 14 and is formed in a convex shape, and this claw portion 14e locks the groove portion 26b formed in the locked member 24. The first piping member 2 and the second piping member 3 are connected, and the first piping member 2 and the second piping member 3 can be prevented from rotating in the circumferential direction.

なお、第２配管部材３の延設筒部３７に形成される窓部３８は、上述した４個の第１係止部１４に対向する部位、つまり、延設筒部３７の円周方向の軸心に対して対向する部位に形成されている。 In addition, the window part 38 formed in the extended cylinder part 37 of the 2nd piping member 3 is a site | part facing the four above-mentioned 1st latching | locking parts 14, ie, the circumferential direction of the extended cylinder part 37 It is formed in the part which opposes with respect to an axial center.

また、ここでは、第１溝部１２を円周上に２箇所形成させ、第１係止部１４を４箇所形成させたが、軸心に対して等間隔であれば円周上に３箇所以上に形成しても良く、しかも、第１係止部１４も４箇所でなく溝部を挟んだ一組が溝部に対応して３箇所でも良い。 In addition, here, the first groove portion 12 is formed at two locations on the circumference and the first locking portions 14 are formed at four locations. However, at equal intervals with respect to the axis, three or more locations on the circumference are provided. In addition, the first locking portion 14 may be formed at three locations corresponding to the groove portions instead of the four locations.

さらに、円周上の中間位置に溝部１３を形成して２分割して、円周上に４個の第１係止部１４を形成したが、溝部１３を形成せずに円周上に２個の第１係止部１４を形成しても良い。 Further, the groove portion 13 is formed at an intermediate position on the circumference and divided into two parts, and four first locking portions 14 are formed on the circumference. Individual first locking portions 14 may be formed.

ところで、以上の構成による配管継手装置では、第１配管部材２と第２配管部材３とを接続する組付けのときに、第１配管部材２を傾けて斜め挿入すると、雄側の継手部（雄側継手）２２で雌側の継手部（雌側継手）３２の内面を擦ることで、Ｏリング５のシール部であるシール面を傷付けることがある。つまり、雄側の継手部２２を内嵌する挿入口３３の内面を傷付けることで洩れ不良の恐れがある。 By the way, in the piping joint device by the above structure, when the 1st piping member 2 is inclined and inserted at the time of the assembly which connects the 1st piping member 2 and the 2nd piping member 3, a male side joint part ( By rubbing the inner surface of the female joint portion (female side joint) 32 with the male side joint) 22, the seal surface that is the seal portion of the O-ring 5 may be damaged. That is, there is a possibility of leakage failure by scratching the inner surface of the insertion port 33 into which the male joint portion 22 is fitted.

そこで、斜め挿入を防止するために、発明者の検討により、以上の構成のうち、図１に示すように、雄側の継手部（雄側継手）２２の長さＬ１、被係止部材２４の嵌合部の長さＬ２、および被係止部材２４の外径と延設筒部３７の内径との片側の嵌合すきまＳを所定の寸法に設定することを見出した。 Therefore, in order to prevent oblique insertion, the inventor's studies have shown that the length L1 of the male joint portion (male side joint) 22 and the locked member 24 are as shown in FIG. It has been found that the length L2 of the fitting portion and the fitting clearance S on one side of the outer diameter of the locked member 24 and the inner diameter of the extended cylindrical portion 37 are set to predetermined dimensions.

より具体的には、雄側の継手部２２と雌側の継手部３２とが嵌め合う嵌合部の他に、延設筒部３７と被係止部材２４とが嵌め合う嵌合部を形成するとともに、その嵌合部の嵌合すきまＳを小さくすることで組付斜角を最大２°以内に収めることが分った。特に、嵌合すきまＳを好ましくは、約０．２５ｍｍ以下とすると、組付斜角を最大２°以内であって斜め組付けが防止できることが分った。なお、この程度の組付角度であれば、経験的に挿入口３３の内面を傷付けることがない。 More specifically, in addition to the fitting portion in which the male joint portion 22 and the female joint portion 32 are fitted, a fitting portion in which the extended cylindrical portion 37 and the locked member 24 are fitted is formed. At the same time, it has been found that the assembly bevel angle can be kept within a maximum of 2 ° by reducing the fitting clearance S of the fitting portion. In particular, it was found that when the fitting clearance S is preferably about 0.25 mm or less, the assembly oblique angle is within 2 ° at the maximum, and the oblique assembly can be prevented. In addition, if it is this assembly angle, the inner surface of the insertion port 33 will not be damaged empirically.

さらに、雄側の継手部２２の長さＬ１を好ましくは、約９ｍｍ以下、被係止部材２４の嵌合部の長さＬ２を好ましくは約２．５ｍｍ以下にすると、より確実に斜め組付けが防止できることを見出した。ここで、嵌合部の長さＬ２は、延設筒部３７の内周面に嵌め合う被係止部材２４の外周のストレート面を指すものである。 Furthermore, when the length L1 of the male joint portion 22 is preferably about 9 mm or less and the length L2 of the fitting portion of the locked member 24 is preferably about 2.5 mm or less, the oblique assembly is more reliably performed. It was found that can be prevented. Here, the length L <b> 2 of the fitting portion refers to the straight surface on the outer periphery of the locked member 24 that fits on the inner peripheral surface of the extending cylinder portion 37.

次に、以上の構成による第１実施形態の配管継手装置の組み付け方法を図１および図２に基づいて説明する。まず、図１に示すように、第１係止部１４が窓部３８に挿入するように第１係止部材１０を第２配管部材３に装着する。第１配管部材２の継手部２２を第２配管部材３の延設筒部３７に対向する位置に配置させた後、第１配管部材２の継手部２２を延設筒部３７内に挿入する。 Next, a method for assembling the pipe joint device according to the first embodiment having the above-described configuration will be described with reference to FIGS. 1 and 2. First, as shown in FIG. 1, the first locking member 10 is attached to the second piping member 3 so that the first locking portion 14 is inserted into the window portion 38. After the joint portion 22 of the first piping member 2 is disposed at a position facing the extended cylindrical portion 37 of the second piping member 3, the joint portion 22 of the first piping member 2 is inserted into the extended cylindrical portion 37. .

これにより、継手部２２の先端部が第１係止部材１０のテーパー面１４ｂを押圧して第２配管部材３の挿入口３３内に挿入されるとともに、被係止部材２４が延設筒部３７内に挿入される。 As a result, the distal end portion of the joint portion 22 presses the tapered surface 14 b of the first locking member 10 and is inserted into the insertion port 33 of the second piping member 3, and the locked member 24 is the extended cylindrical portion. 37 is inserted.

従って、雄側の継手部２２と雌側の継手部３２との嵌合部の他に、延設筒部３７と被係止部材２４との２重の嵌合部が第１配管部材２を挿入するときの案内部となって、継手部２２の先端部がＯリング５の配設されるシール部を擦ることなく挿入口３３内に挿入することができる。これにより、第１配管部材２の組付斜角を最大２°以内に収めることができる。 Therefore, in addition to the fitting portion between the male joint portion 22 and the female joint portion 32, the double fitting portion of the extended tube portion 37 and the locked member 24 connects the first piping member 2. It becomes a guide part at the time of insertion, and the front-end | tip part of the joint part 22 can be inserted in the insertion port 33, without rubbing the seal part by which the O-ring 5 is arrange | positioned. Thereby, the assembly oblique angle of the 1st piping member 2 can be stored in 2 degrees or less at the maximum.

一方、このときに、被係止部材２４のテーパー外面２５で第１係止部材１０のテーパー面１４ｂを押圧することにより、第１係止部１４が第１本体リンク部１１を支点として径方向に拡径して窓部３８から脱着するように作用する。 On the other hand, at this time, by pressing the tapered surface 14b of the first locking member 10 with the tapered outer surface 25 of the locked member 24, the first locking portion 14 is diametrically about the first main body link portion 11 as a fulcrum. The diameter is increased so as to be detached from the window 38.

そして、図２に示すように、テーパー外面２５が第２配管部材３のテーパー内面３４に当接すると、第１係止部材１０は弾性復帰して延設筒部３７の窓部３８内に進入して第１係止部１４の爪部１４ｅ内壁面が第１配管部材２の被係止部材２４に形成された溝部２６ｂに係合するとともに、第１係止部１４の直線部１４ａが被係止部材２４の溝部２６ｂ内周面に当接する。 As shown in FIG. 2, when the tapered outer surface 25 comes into contact with the tapered inner surface 34 of the second piping member 3, the first locking member 10 is elastically restored and enters the window portion 38 of the extended cylindrical portion 37. Then, the inner wall surface of the claw portion 14e of the first locking portion 14 is engaged with the groove portion 26b formed in the locked member 24 of the first piping member 2, and the linear portion 14a of the first locking portion 14 is covered. It contacts the inner peripheral surface of the groove 26b of the locking member 24.

これにより、第１係止部１４が第２配管部材３に形成された窓部３８に支持されることになって、第１、第２配管部材２、３同士が軸方向を拘束されて第１配管部材２がワンタッチで第２配管部材３に接続される。また、第１係止部１４の爪部１４ｅが溝部２６ｂに係合しているので第１配管部材２と第２配管部材３との回り止めが図られる。 As a result, the first locking portion 14 is supported by the window 38 formed in the second piping member 3, and the first and second piping members 2, 3 are constrained in the axial direction and One piping member 2 is connected to the second piping member 3 with one touch. Further, since the claw portion 14e of the first locking portion 14 is engaged with the groove portion 26b, the first piping member 2 and the second piping member 3 are prevented from rotating.

なお、本実施形態では、第１配管部材２の継手部２２には、Ｏリング５が嵌入される溝２３を一つ形成したが、これに限らず、二つ以上の複数個溝２３を形成して複数個のＯリング５を嵌入して継手部２２と挿入部３３とが気密されるように構成しても良い。 In the present embodiment, one groove 23 into which the O-ring 5 is inserted is formed in the joint portion 22 of the first piping member 2. However, the present invention is not limited to this, and two or more grooves 23 are formed. Then, a plurality of O-rings 5 may be inserted so that the joint portion 22 and the insertion portion 33 are hermetically sealed.

また、空調用冷凍サイクルに用いられる冷媒配管は、一般的に外形がφ６ｍｍ〜１インチサイズの金属製の配管を用いており、これらのサイズの冷媒配管に、嵌合すきまＳを約０．２５ｍｍ以下、雄側の継手部２２の長さＬ１を約９ｍｍ以下、および被係止部材２４の嵌合部の長さＬ２を約２．５ｍｍ以下と設定することで、組付け時における斜め挿入の組付けをより抑制できる。 In addition, the refrigerant pipes used in the air-conditioning refrigeration cycle generally use metal pipes having an outer diameter of φ6 mm to 1 inch, and the fitting clearance S is set to about 0.25 mm in the refrigerant pipes of these sizes. Hereinafter, the length L1 of the male joint portion 22 is set to about 9 mm or less, and the length L2 of the fitting portion of the locked member 24 is set to about 2.5 mm or less. Assembly can be further suppressed.

以上の第１実施形態による配管継手装置によれば、第２配管部材３の端末に形成され、第１配管部材２側に向かって雌側の継手部３２から延設する延設筒部３７と、雄側の継手部２２の根元部に外方へ環状に突出形成され、その延設筒部３７に嵌入する被係止部材２４とを備え、この被係止部材２４の外径と延設筒部３７の内径との片側の嵌合すきまＳが約０．２５ｍｍ以下としている。 According to the pipe joint device according to the first embodiment described above, the extending cylinder part 37 is formed at the end of the second pipe member 3 and extends from the female-side joint part 32 toward the first pipe member 2 side. And a locked member 24 that is formed in an annularly projecting outward shape at the root of the male joint portion 22 and that fits into the extended cylindrical portion 37. The outer diameter of the locked member 24 extends. The fitting clearance S on one side with the inner diameter of the cylindrical portion 37 is about 0.25 mm or less.

これよれば、雄側の継手部２２と雌側の継手部３２とが嵌め合う嵌合部の他に、延設筒部３７と被係止部材２４とが嵌め合うことで、第２配管部材３に第１配管部材２を組み付けるときに、二重の案内部が形成されることで、斜め挿入の組付けを抑制できる。従って、組付斜角を小さくすることができる。 According to this, in addition to the fitting portion in which the male joint portion 22 and the female joint portion 32 are fitted, the extended tubular portion 37 and the locked member 24 are fitted, whereby the second piping member. When the first piping member 2 is assembled to 3, the double guide portion is formed, thereby suppressing the oblique insertion. Therefore, the assembly oblique angle can be reduced.

また、嵌合すきまが約０．２５ｍｍ以下であれば、組付け後の振動などによる雄側の継手部２２と雌側の継手部３２とが嵌め合う嵌合部における傾きが低減する。これにより、組付け後のシール部の洩れ不良を防止することができる。 If the fitting clearance is about 0.25 mm or less, the inclination at the fitting portion where the male joint portion 22 and the female joint portion 32 fit together due to vibration after assembly or the like is reduced. Thereby, the leakage defect of the seal part after an assembly can be prevented.

しかも、雌側の継手部３２に嵌入される雄側の継手部２２の長さＬ１が約９ｍｍ以上としている。これによれば、雄側の継手部２２の長さＬ１が約９ｍｍ以上であれば、第２配管部材３に第１配管部材２を組み付けるときに、より具体的に組付斜角が最大約２°未満となって、雄側の継手部２２によるＯリング５のシール部への傷つきが低減される。これにより、シール部の洩れ不良を防止することができる。 Moreover, the length L1 of the male joint portion 22 fitted into the female joint portion 32 is about 9 mm or more. According to this, when the length L1 of the male joint portion 22 is about 9 mm or more, when the first piping member 2 is assembled to the second piping member 3, the assembling oblique angle is more specifically about maximum. As a result, the damage to the seal portion of the O-ring 5 by the male joint portion 22 is reduced. Thereby, the leakage defect of a seal part can be prevented.

さらに、延設筒部３７と被係止部材２４との嵌合部の長さＬ３が約２．５ｍｍ以上としている。これによれば、延設筒部３７と被係止部材２４とが嵌め合う嵌合部が、雄側の継手部２２と雌側の継手部３２とが嵌め合う嵌合部の他に、少なくとも２番目の案内部として形成することができる。 Furthermore, the length L3 of the fitting portion between the extended cylindrical portion 37 and the locked member 24 is about 2.5 mm or more. According to this, the fitting part in which the extending cylinder part 37 and the locked member 24 are fitted is at least in addition to the fitting part in which the male joint part 22 and the female joint part 32 are fitted. It can be formed as a second guide.

被係止部材２４を、別体で形成して、第１配管部材２の外周に固定するようにしたことにより、従来は被係止部材２４をバルジ加工によって第１配管部材２に一体成形で形成していたが、これに限らず、被係止部材２４を第１配管部材２に、拡管加工などによって配設することで製造コストを高めることなく形成できる。 Since the locked member 24 is formed as a separate body and fixed to the outer periphery of the first piping member 2, conventionally, the locked member 24 is integrally formed with the first piping member 2 by bulging. Although it formed, it is not restricted to this, It can form, without raising manufacturing cost by arrange | positioning the to-be-latched member 24 in the 1st piping member 2 by a pipe expansion process etc.

なお、被係止部材２４は、第１係止部１４に係合される被係止部材２４の所定の面に凹状の溝部２６ｂと、第１係止部１４に凸状の爪部１４ｅとが設けられ、溝部２６ｂに爪部１４ｅが嵌入されることで、第２配管部材３と第１配管部材２とが回り止めされていることにより、爪部１４ｅが溝部２６ｂに保持されることで、第１配管部材２と第２配管部材３との回り止めが図れる。 The locked member 24 includes a groove 26 b that is concave on a predetermined surface of the locked member 24 that is engaged with the first locking portion 14, and a claw 14 e that is convex on the first locking portion 14. Since the claw portion 14e is inserted into the groove portion 26b and the second piping member 3 and the first piping member 2 are prevented from rotating, the claw portion 14e is held in the groove portion 26b. The rotation prevention of the 1st piping member 2 and the 2nd piping member 3 can be aimed at.

また、軸心に向けて突出する複数の拡径・縮径可能な第１係止部１４を有する第１係止部材１０と、延設筒部３７の円周方向に形成され、第１係止部１４に係合可能な窓部３８とを有し、第１係止部１４が窓部３８に装着する第１係止部材１０である配管継手を用いることにより、第１係止部１４は、拡径、縮径することで、第１配管部材２と第２配管部材３とがワンタッチで固定できる配管継手に、本発明を適用させることで組付け時の生産性の向上が図れるとともにシール部の傷つき不良の低減が図れる。 Further, the first locking member 10 having a plurality of first locking portions 14 projecting toward the axis and capable of expanding and reducing the diameter and the extending cylinder portion 37 are formed in the circumferential direction, and the first engagement member 10 is formed. By using a pipe joint that is a first locking member 10 that has a window portion 38 that can be engaged with the locking portion 14, and the first locking portion 14 is attached to the window portion 38, the first locking portion 14 is used. As the diameter of the pipe joint is increased and reduced, the productivity of the assembling can be improved by applying the present invention to the pipe joint in which the first pipe member 2 and the second pipe member 3 can be fixed with one touch. It is possible to reduce the damage of the seal portion.

（第２実施形態）
以上の第１実施形態では、第１係止部１４に係合される被係止部材２４を第１配管部材２とは別体で形成して第１配管部材２に一体に構成したが、これに限らず、第１配管部材２の雄側の継手部２２として形成される外方へ環状に突き出した膨拡部２４に第１係止部１４を係止させるように構成しても良い。 (Second Embodiment)
In the above first embodiment, the locked member 24 engaged with the first locking portion 14 is formed separately from the first piping member 2 and is configured integrally with the first piping member 2. Not only this but you may comprise so that the 1st latching | locking part 14 may be latched by the expansion part 24 protruded cyclically | annularly outward formed as the joint part 22 of the male side of the 1st piping member 2. As shown in FIG. .

具体的には、第１配管部材２の雄側の継手部２２を、図５に示すように、溝２３の反先端部側に外方に突き出した膨拡部２４を形成し、この膨拡部２４の前部に先端側に向かって小径となるテーパー外面２５を形成するとともに、膨拡部２４の後部に配置される筒部２１と膨拡部２４の段差面が第１係止部材１０の第１係止部１４と係止する後端係止面２６として形成している。なお、この膨拡部２４はバルジ加工により第１配管部材２に一体的に形成することができる。 Specifically, as shown in FIG. 5, the joint portion 22 on the male side of the first piping member 2 is formed with an inflated portion 24 projecting outward on the opposite end side of the groove 23, and this inflated portion. A tapered outer surface 25 having a smaller diameter toward the front end side is formed at the front portion of the portion 24, and the stepped surface of the cylindrical portion 21 and the expanded portion 24 disposed at the rear portion of the expanded portion 24 is the first locking member 10. This is formed as a rear end locking surface 26 that locks with the first locking portion 14. The expanded portion 24 can be formed integrally with the first piping member 2 by bulge processing.

（第３実施形態）
以上の実施形態では、第２配管部材３の先端部に一体的に延設筒部３７を形成したが、これに限らず、具体的には、図６に示すように、別体で略円筒状の延設筒部３７を形成して、第２配管部材３雌側の継手部３２の外周に固定するように形成しても良い。これによれば、製造コストを高めることなく形成できる。 (Third embodiment)
In the above embodiment, the extending cylindrical portion 37 is integrally formed at the distal end portion of the second piping member 3. However, the present invention is not limited to this, and specifically, as shown in FIG. A cylindrical extending cylindrical portion 37 may be formed and fixed to the outer periphery of the joint portion 32 on the female side of the second piping member 3. According to this, it can form, without raising manufacturing cost.

なお、別体の延設筒部３７は、その断面形状を略円筒状に形成したが、これに限らず、略楕円状や多角形状に形成しても良い。 In addition, although the separate extended cylinder part 37 formed the cross-sectional shape in the substantially cylindrical shape, you may form not only in this but in a substantially elliptical shape or a polygonal shape.

（他の実施形態）
以上の実施形態では、被係止部材２４の形状を第１配管部材２と第２配管部材３とが回り止めするように形成したが、回り止め機能が付加されてなくても良い。 (Other embodiments)
In the above embodiment, although the shape of the to-be-latched member 24 was formed so that the 1st piping member 2 and the 2nd piping member 3 stop rotation, the rotation stop function does not need to be added.

また、以上の実施形態では、本発明を第１配管部材２と第２配管部材３とがワンタッチで固定できる配管継手を用いた配管継手装置に適用させたが、これに限らず、ワンタッチで固定できる配管継手以外の配管継手を用いた配管継手構造に適用することができる。 In the above embodiment, the present invention is applied to a pipe joint device using a pipe joint in which the first pipe member 2 and the second pipe member 3 can be fixed with one touch. The present invention can be applied to a pipe joint structure using a pipe joint other than the pipe joint that can be used.

また、以上の実施形態では、本発明を車両用空調用冷凍サイクルの冷媒配管に適用させたが、これに限定することなく、流体を封入する配管に適用できる。 In the above embodiment, the present invention is applied to the refrigerant piping of the refrigeration cycle for vehicle air conditioning. However, the present invention is not limited to this and can be applied to piping for enclosing fluid.

本発明の第１実施形態における第１配管部材２を第２配管部材３に挿入する前の形態を示す断面図である。It is sectional drawing which shows the form before inserting the 1st piping member 2 in 2nd piping member 3 in 1st Embodiment of this invention. 本発明の第１実施形態における配管継手装置の全体構成を示す部分断面図である。It is a fragmentary sectional view showing the whole piping joint device composition in a 1st embodiment of the present invention. 本発明の第１実施形態における被係止部材２４の全体構成を示す（ａ）は側面図、（ｂ）は図３（ａ）に示すＡ−Ａ断面図である。(A) which shows the whole structure of the to-be-latched member 24 in 1st Embodiment of this invention is a side view, (b) is AA sectional drawing shown to Fig.3 (a). 本発明の第１実施形態における第１係止部材１０の全体構成を示す（ａ）は側面図、（ｂ）は部分断面図である。BRIEF DESCRIPTION OF THE DRAWINGS (a) which shows the whole structure of the 1st locking member 10 in 1st Embodiment of this invention is a side view, (b) is a fragmentary sectional view. 本発明の第２実施形態における配管継手装置の全体構成を示す部分断面図である。It is a fragmentary sectional view which shows the whole structure of the piping joint apparatus in 2nd Embodiment of this invention. 本発明の第３実施形態における配管継手装置の全体構成を示す部分断面図である。It is a fragmentary sectional view showing the whole pipe joint device composition in a 3rd embodiment of the present invention. 第１配管部材２が斜めに傾いて第２配管部材３に挿入したときの作用形態を示す説明図である。It is explanatory drawing which shows an effect | action form when the 1st piping member 2 inclines diagonally and it inserts in the 2nd piping member 3. FIG.

Explanation of symbols

２…第１配管部材
３…第２配管部材
１０…第１係止部材（配管継手）
１１…第１本体リンク部（第１薄肉部）
１２…第１溝部
１４…第１係止部
２２…雄側の継手部、継手部（雄側継手）
２４…被係止部材、膨拡部（膨拡部）
３２…雌側の継手部、継手部（雌側継手）
３７…延設筒部
３８…窓部 2 ... 1st piping member 3 ... 2nd piping member 10 ... 1st locking member (pipe joint)
11 ... 1st body link part (1st thin part)
DESCRIPTION OF SYMBOLS 12 ... 1st groove part 14 ... 1st latching | locking part 22 ... Male side joint part, joint part (male side joint)
24: Locked member, expanded portion (expanded portion)
32 ... Female side joint, joint (female side joint)
37 ... Extended cylinder part 38 ... Window part

Claims

A pipe joint device for connecting a first pipe member (2) having a male side joint (22) and a second pipe member (3) having a female side joint (32) into which the male side joint (22) is inserted. In
An extending tube portion (37) formed at the end of the second piping member (3) and extending from the female joint (32) toward the first piping member (2) side;
An extended portion (24) that is annularly projected outward from the base portion of the male side joint (22) and that fits into the extended tube portion (37);
The pipe joint device according to claim 1, wherein a fitting clearance on one side between an outer diameter of the expanded portion (24) and an inner diameter of the extended cylindrical portion (37) is about 0.25 mm or less.

The first piping member (2) according to claim 1, wherein the length of the male side joint (22) fitted into the female side joint (32) is preferably about 9 mm or more. Piping joint device.

The pipe joint device according to claim 1, wherein the expansion portion (24) has a fitting portion length of preferably about 2.5 mm or more.

The said expansion part (24) consists of another body, and is arrange | positioned by the outer periphery of the said 1st piping member (2), The Claim 1 thru | or 3 characterized by the above-mentioned. Piping joint device.

The said extended cylinder part (37) consists of another body, and is arrange | positioned by the outer periphery of the said female side joint (32), The Claim 1 thru | or 3 characterized by the above-mentioned. Piping joint device.

A plurality of first groove portions (12) formed at equal intervals with respect to the axial center from one end of the cylindrically formed main body, and extending from each end surface, and the first groove portions at both end portions of the main body A pipe having a plurality of first locking portions (14) that are formed in the first thin-walled portion (11) on the circumference where (12) is not formed and project toward the axial center and can be expanded and contracted. A joint (10);
A window portion (38) formed along the circumferential direction of the extending tube portion (37) and engageable with the first locking portion (14);
The pipe according to any one of claims 1 to 5, wherein the pipe joint (10) has the first locking part (14) attached to the window part (38). Fitting device.