JP2019120309A - Metal tube joint - Google Patents
Metal tube joint Download PDFInfo
- Publication number
- JP2019120309A JP2019120309A JP2017254800A JP2017254800A JP2019120309A JP 2019120309 A JP2019120309 A JP 2019120309A JP 2017254800 A JP2017254800 A JP 2017254800A JP 2017254800 A JP2017254800 A JP 2017254800A JP 2019120309 A JP2019120309 A JP 2019120309A
- Authority
- JP
- Japan
- Prior art keywords
- metal pipe
- seal
- metal
- lock
- pipe joint
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 103
- 239000002184 metal Substances 0.000 title claims abstract description 103
- 238000003780 insertion Methods 0.000 claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 23
- 229920001973 fluoroelastomer Polymers 0.000 claims 1
- 210000001699 lower leg Anatomy 0.000 abstract 4
- 230000037250 Clearance Effects 0.000 abstract 1
- 230000035512 clearance Effects 0.000 abstract 1
- 210000000078 Claw Anatomy 0.000 description 15
- 238000005452 bending Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 210000001513 Elbow Anatomy 0.000 description 2
- 210000001503 Joints Anatomy 0.000 description 2
- 235000013351 cheese Nutrition 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 210000000282 Nails Anatomy 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound 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[Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound 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Images
Abstract
Description
本出願は、ガス配管等の金属管を接続する際に使用される金属管継手に関する。 The present application relates to a metal pipe joint used in connecting metal pipes such as gas pipes.
従来、医療用として使用されるガス配管等の金属管を接続する手段として、ロウ付けによる接合が行われてきた。近年ではその接続方法に代わる医療用継手として、ワンタッチで接合可能なワンタッチ継手が利用されるようになった。ワンタッチ継手は、接合に火気を使用せず、特別な専用工具を用いることなく接続できるため、容易な施工が可能となる。 Conventionally, bonding by brazing has been performed as a means for connecting metal pipes such as gas pipes used for medical purposes. In recent years, one-touch joints that can be joined by one-touch operation have come to be used as medical joints in place of the connection method. The one-touch joint can be connected without using fire for joining, and can be connected without using a special dedicated tool, which enables easy construction.
このようなワンタッチ継手として特許文献１に開示されたものがある。従来の継手は、複数の規制片を備えた複数個のロックリングを本体に内蔵しており、金属管をロックリングを貫通して差し込むことによって、ロックリングの爪が管外面に食い込み、抜け止めが成される。 As such a one-touch joint, there is one disclosed in Patent Document 1. The conventional joint incorporates a plurality of lock rings having a plurality of restricting pieces in the main body, and by inserting a metal pipe through the lock ring, the claws of the lock ring bite into the outer surface of the pipe and prevent it from coming off Is made.
従来の金属管継手では、金属管を継手に挿入する際、金属管は先ずロックリングと接触してロックリングの爪（規制片）が管外面に食い込んだ後、更に奥側に設けられたシール部材（Ｏリング）によって固定されている。しかしながら、ロックリングの爪が金属管の管外面に食い込むことで管外面に傷が付き、金属管の先端部分がその状態でシール部材に挿入されるため、傷によりシール部材と管外面との間に隙間が発生し、そこからガス等の漏れが発生する可能性があった。 In the conventional metal pipe joint, when the metal pipe is inserted into the joint, the metal pipe first contacts the lock ring and the claw (regulating piece) of the lock ring bites into the outer surface of the pipe, and then the seal provided further back It is fixed by a member (O ring). However, since the claw of the lock ring bites into the outer surface of the metal tube, the outer surface of the tube is damaged, and the tip portion of the metal tube is inserted into the seal member in that state. There is a possibility that a gap may occur and a leak of gas etc. may occur from there.
１つの側面では、シール部材と管外面との隙間をなくし、漏れの発生を防止する金属管継手を提供することを目的とする。 In one aspect, it is an object of the present invention to provide a metal pipe joint that eliminates the gap between the seal member and the outer surface of the pipe and prevents the occurrence of a leak.
１つの形態によれば、金属管を接続する金属管継手であって、金属管が挿入される挿入孔が形成された胴部と、胴部内に同軸線上に内蔵される環状のロックリングであって、内方に突出して金属管の引き抜きを規制する規制片を複数備える、ロックリングと、金属管が挿通する筒状の押え部であって、胴部の挿入孔に装着され、ロックリングを胴部に固定する押え部と、押え部内に同軸線上に内蔵され、金属管が挿通されたときに金属管の管外面に接するよう設けられる環状の第１シール部材と、を備える、金属管継手が提供される。 According to one aspect, a metal pipe joint for connecting a metal pipe, the body having an insertion hole into which the metal pipe is inserted, and an annular lock ring coaxially incorporated in the body. Lock ring having a plurality of restricting pieces projecting inward to restrict withdrawal of the metal pipe, and a cylindrical pressing portion through which the metal pipe is inserted, the lock ring being mounted in the insertion hole of the body portion A metal pipe joint comprising: a pressing portion fixed to the body portion; and an annular first seal member coaxially incorporated in the pressing portion and provided so as to contact the outer surface of the metal tube when the metal tube is inserted. Is provided.
ロックリングによる傷のない部分が押え部内のシール部材によってシールされるためガスの漏れ等を防止することができる。 Since the portion without damage by the lock ring is sealed by the seal member in the pressing portion, it is possible to prevent gas leakage and the like.
以下、添付図面を用いて本出願の実施の形態を、具体的な実施例に基づいて詳細に説明する。また、以下の実施の形態において同一又は類似の要素には共通の参照符号を付けて示し、理解を容易にするために、これらの図面は縮尺を適宜変更している。 Hereinafter, embodiments of the present application will be described in detail based on specific examples using the attached drawings. Further, in the following embodiments, the same or similar elements are denoted by the same reference numerals, and the drawings are appropriately scaled in order to facilitate understanding.
図１は本実施形態に係る金属管継手１０の全体を示す側面図、図２は図１の部分Ａにおける金属管継手１０の上半断面図である。金属管継手１０は複数の金属管Ｐを接続する継手であり、金属管継手１０は金属管Ｐを直線状に接続するソケットと呼ばれる型の金属管継手である。金属管継手１０は中央部分において左右対称であり、以下では図１の部分Ａにおける金属管継手１０の構造について説明し、他方の部分の説明は省略する。なお、金属管Ｐは、例えば銅、銅合金又はアルミニウム等の軟質の金属材料から作製される管であり、ガス配管等に使用される。 FIG. 1 is a side view showing the entire metal pipe joint 10 according to this embodiment, and FIG. 2 is an upper half sectional view of the metal pipe joint 10 in a portion A of FIG. The metal pipe joint 10 is a joint for connecting a plurality of metal pipes P, and the metal pipe joint 10 is a metal pipe joint of a type called a socket for connecting the metal pipes P in a straight line. The metal pipe joint 10 is symmetrical in the central portion, and hereinafter, the structure of the metal pipe joint 10 in the portion A of FIG. 1 will be described, and the description of the other portion will be omitted. The metal pipe P is a pipe made of a soft metal material such as copper, copper alloy or aluminum, and is used for gas piping and the like.
図１及び図２に示されるように、金属管継手１０は、金属管Ｐが挿入される挿入孔１ａが形成された胴部１と、金属管Ｐの引き抜きを規制する環状のロックリング３と、金属管Ｐが挿通するとともに、ロックリング３を胴部１に固定する押え部２とを備える。押え部２の内部には、挿入された金属管Ｐの管外面と接触して押え部２と金属管Ｐの管外面との間をシールする第１シール部材が設けられる。また、胴部１と押え部２の間をシールする第２シール部材を備える。 As shown in FIGS. 1 and 2, the metal pipe joint 10 includes a body 1 having an insertion hole 1a into which the metal pipe P is inserted, and an annular lock ring 3 for restricting the metal pipe P from being pulled out. And a pressing portion 2 for inserting the metal pipe P and fixing the lock ring 3 to the trunk portion 1. A first seal member is provided in the inside of the pressing portion 2 in contact with the outer surface of the inserted metal tube P to seal between the pressing portion 2 and the outer surface of the metal tube P. In addition, a second seal member for sealing between the body portion 1 and the pressing portion 2 is provided.
胴部１の挿入孔１ａの内部は、金属管Ｐの接続側から奥端側に向けて（図２の矢印Ｂ方向）、シール部Ｃ、差込規制部Ｄが設けられている。差込規制部Ｄでは、環状の段差により奥端側にいくほど縮径されている。差込規制部Ｄは２つのロックリング３を、胴部１内に同軸線上に内蔵するよう、収容可能な大きさと奥行きで形成されている。また、シール部Ｃには、押え部２に螺合する雌ねじ部１ｂが形成されている。 Inside the insertion hole 1a of the body portion 1, the seal portion C and the insertion restricting portion D are provided from the connection side of the metal pipe P toward the back end side (arrow B direction in FIG. 2). In the insertion control portion D, the diameter is reduced toward the back end side by the annular step. The insertion restricting portion D is formed to have a size and a depth which can be accommodated so as to coaxially incorporate the two lock rings 3 in the trunk portion 1. Further, in the seal portion C, a female screw portion 1 b to be screwed to the pressing portion 2 is formed.
押え部２は、筒状の部材であり、一端側に金属管Ｐの差込孔２ａが形成されていて、他端側に外周に胴部１の雌ねじ部１ｂに螺合する雄ねじ部２ｂと、第２シール部材５が配置される溝２ｃが形成されている。そのため第２シール部材５は、胴部１の挿入孔１ａの内側において、胴部１と押え部２との間に配置されるようになる。また、押え部２の内部には、第１シール部材４を嵌め込むための溝２ｄが設けられている。 The pressing portion 2 is a cylindrical member, and the insertion hole 2a of the metal pipe P is formed at one end side, and the male screw portion 2b screwed to the female screw portion 1b of the body 1 at the other end side A groove 2c is formed in which the second seal member 5 is disposed. Therefore, the second seal member 5 is disposed between the trunk portion 1 and the pressing portion 2 inside the insertion hole 1 a of the trunk portion 1. Further, a groove 2 d for inserting the first seal member 4 is provided in the inside of the pressing portion 2.
ロックリング３の詳細について、図３及び図４を用いて説明する。ロックリング３は、金属製の円盤の外周部分を折り曲げ加工して作成されたものである。金属製の円板に、金属管Ｐが挿通する挿通孔３ｃが形成されていて、挿通孔３ｃの周囲に複数の爪３ｂ（規制片の一例）が形成されている。すなわち、複数の爪３ｂは、ロックリング３の内方に突出して設けられる。爪３ｂは、図４に示されるように、金属管Ｐの挿通方向（図の矢印Ｂ方向）に向かって折曲加工により形成される。爪３ｂの先端同士を結ぶ仮想円Ｅ（図３の二点鎖線）が、接続しようとする金属管Ｐの外形Ｐａよりも僅かに小径となるように、爪３ｂが折曲加工されている。これによって、金属管Ｐの挿通時には、爪３ｂによる仮想円Ｅの径が弾性的に広がることで、金属管Ｐの挿通が許容される。一方、金属管Ｐが挿通した後は、金属管Ｐに引き抜き方向（図４の矢印Ｆ方向）の力が加われば、爪３ｂの先端が、金属管Ｐの外表面に食い込んで、金属管Ｐが引き抜かれるのを規制する。すなわち、金属管Ｐをロックリング３に差し込むだけで引き抜きが規制されるようになり、このロックリング３が設けられた金属管継手１０は、ワンタッチ継手となる。 Details of the lock ring 3 will be described using FIGS. 3 and 4. The lock ring 3 is formed by bending an outer peripheral portion of a metal disk. The insertion hole 3c which the metal pipe P penetrates is formed in the metal disc, and the some nail | claw 3b (an example of a control piece) is formed in the circumference | surroundings of the insertion hole 3c. That is, the plurality of claws 3 b are provided to protrude inward of the lock ring 3. As shown in FIG. 4, the claws 3 b are formed by bending in the insertion direction of the metal pipe P (the direction of the arrow B in the drawing). The claw 3b is bent so that an imaginary circle E (two-dot chain line in FIG. 3) connecting the tips of the claws 3b has a diameter slightly smaller than the outer diameter Pa of the metal pipe P to be connected. Thereby, when the metal pipe P is inserted, the diameter of the imaginary circle E by the claws 3 b is elastically expanded, and the insertion of the metal pipe P is allowed. On the other hand, after the metal pipe P has been inserted, if the force in the pulling direction (the direction of arrow F in FIG. 4) is applied to the metal pipe P, the tip of the claw 3b bites into the outer surface of the metal pipe P. Regulate the withdrawal of That is, only by inserting the metal pipe P into the lock ring 3, the extraction is restricted, and the metal pipe joint 10 provided with the lock ring 3 becomes a one-touch joint.
このような爪３ｂからなる挿通孔３ｃが形成されたロックリング３において、その外周に位置する円板面３ａには、挿通孔３ｃの軸線Ｓ（図面上の一点鎖線）と平行する水平なフランジ３ｄが連続して設けられている。このフランジ３ｄは、折り曲げ加工によって形成されたものである。また、この実施形態では、フランジ３ｄの先端部をさらに半径方向内向き９０度に折り曲げて、ロックリング３の円板面３ａと平行する垂直部３ｅを形成している。 In the lock ring 3 in which the insertion hole 3c composed of such a claw 3b is formed, a horizontal flange parallel to the axis S (the alternate long and short dash line in the drawing) of the disk surface 3a located on the outer periphery 3d is provided continuously. The flange 3d is formed by bending. Further, in this embodiment, the front end of the flange 3 d is further bent inward in the radial direction by 90 degrees to form a vertical portion 3 e parallel to the disc surface 3 a of the lock ring 3.
図２に示されるように、２つのロックリング３が同軸線上に並べられて胴部１内に組み込まれる。ロックリング３のフランジ３ｄは、隣り合うロックリング３の円板面３ａが互いに当接して、両ロックリング３・３の間に隙間を確保するためのものである。このような隙間を確保することによって、ロックリング３同士がぴったり重なることを防止して、それぞれの爪３ｂを独立して機能させることができる。なお、フランジ３ｄの先端部が爪３ｂよりも円板面３ａから突出しているが、フランジ３ｄの長さ（円板面３ａから垂直部３ｅまでの長さ）はこれに限定するものではなく、爪３ｂがフランジ３ｄの先端部よりも突出する長さとしてもよい。また、図に示すロックリング３は２つであるが、１つでもよく、また３つ以上設けられてもよい。 As shown in FIG. 2, two lock rings 3 are coaxially aligned and incorporated into the body 1. The flanges 3 d of the lock ring 3 are for the disc surfaces 3 a of the adjacent lock rings 3 to abut each other to secure a gap between the two lock rings 3. By securing such a gap, it is possible to prevent the lock rings 3 from overlapping one another and to cause the respective claws 3b to function independently. Although the tip of the flange 3d protrudes from the disc surface 3a more than the claw 3b, the length of the flange 3d (the length from the disc surface 3a to the vertical portion 3e) is not limited to this, The claw 3b may have a length that protrudes beyond the tip of the flange 3d. Moreover, although the number of lock rings 3 shown in the drawing is two, it may be one, or three or more.
金属管継手１０の第１シール部材４及び第２シール部材５は、Ｏリングと呼ばれるものであり、耐ガス透過性能に優れたフッ素ゴムにより形成されるのが望ましい。本実施形態では、金属管Ｐとの隙間をシールするために２重のＯリング構造が用いられている。また、第２シール部材により、胴部１と押え部２の間がシールされている。そのため、ロックリング３と金属管Ｐとの間に隙間ができ、さらに胴部１と押え部２の間に隙間ができても、ガスが漏れることが防止される。押え部２の内部に設けられる第１シール部材４は１つだけでもよく、また３つ以上設けられてもよい。 The first seal member 4 and the second seal member 5 of the metal pipe joint 10 are so-called O-rings, and are preferably formed of fluorine rubber excellent in gas permeation resistance. In the present embodiment, a double O-ring structure is used to seal a gap with the metal pipe P. In addition, the second seal member seals between the body 1 and the pressing portion 2. Therefore, a gap is formed between the lock ring 3 and the metal pipe P, and even if a gap is formed between the body portion 1 and the pressing portion 2, the gas is prevented from leaking. The number of first sealing members 4 provided inside the pressing portion 2 may be one, or three or more.
金属管継手１０の組立手順としては、押え部２の内部に予め第１シール部材４及び第２シール部材５を組み付けておく。そして、胴部１に対して二つのロックリング３を挿入し、その状態で、第１シール部材４及び第２シール部材５が組み付けられた押え部２を胴部１に螺合装着することで、金属管継手１０が完成する。 As an assembly procedure of the metal pipe joint 10, the first seal member 4 and the second seal member 5 are previously assembled to the inside of the pressing portion 2. Then, the two lock rings 3 are inserted into the body portion 1, and in this state, the pressing portion 2 to which the first seal member 4 and the second seal member 5 are assembled is screwed and attached to the body portion 1. , Metal pipe joint 10 is completed.
金属管継手１０を用いた施工方法について説明する。カッター等を用いて金属管Ｐを覆う樹脂被覆に、金属管Ｐの先端部から所定の距離Ｔ（図２参照）離れた位置に切れ目を入れる。次に、金属管Ｐの端部の樹脂被覆を取り除く。金属部分がむき出しになった部分の長さ（Ｔ）が、金属管継手１０への挿入長さとなる。つぎに、金属管Ｐの内外面の面取りを行い、金属管継手１０の差込孔２ａから、金属管Ｐを樹脂被覆がある部分まで挿入する。金属部分がむき出しになった部分が、金属管継手１０のロックリング３により固定されることで施工が完了する。 The construction method using the metal pipe joint 10 will be described. A cut is made in the resin coating covering the metal pipe P using a cutter or the like at a position separated from the tip of the metal pipe P by a predetermined distance T (see FIG. 2). Next, the resin coating on the end of the metal pipe P is removed. The length (T) at which the metal portion is exposed is the insertion length into the metal pipe joint 10. Next, the inner and outer surfaces of the metal pipe P are chamfered, and the metal pipe P is inserted from the insertion hole 2a of the metal pipe joint 10 to the portion where the resin coating is present. The construction is completed by fixing the exposed metal portion with the lock ring 3 of the metal pipe joint 10.
従来の金属管継手では、ロックリングを通過した部分がシール部材によりシールされていた。そのため、ロックリングにより傷が付いた部分がシール部材と接触していた。本実施形態の金属管継手１０では、金属管Ｐを挿入して固定する際、先に押え部の第１シール部材を経由してからロックリング３によって固定される。そのため、ロックリング３により傷がついていない部分が、第１シール部材４と接触する。そのため、第１シール部材４と金属管Ｐとの間に隙間はできず、ガス漏れ等の発生を防止することができる。 In the conventional metal pipe joint, the part which passed the lock ring was sealed by the sealing member. Therefore, the portion damaged by the lock ring was in contact with the seal member. In the metal pipe joint 10 of the present embodiment, when inserting and fixing the metal pipe P, the metal pipe joint 10 is fixed by the lock ring 3 first via the first seal member of the pressing portion. Therefore, a portion not damaged by the lock ring 3 contacts the first seal member 4. Therefore, no gap can be formed between the first seal member 4 and the metal pipe P, and the occurrence of gas leakage and the like can be prevented.
図５（ａ）及び図５（ｂ）に、本実施形態の金属管継手１０の別の実施例を示す。図５（ａ）に示される金属管継手１１はエルボと呼ばれるものであり、２本の金属管をＬ字状に接続する際に使用される。図５（ｂ）に示される金属管継手１２は、チーズと呼ばれるものであり、３本の金属管をＴ字状に接続する際に使用される。 FIGS. 5 (a) and 5 (b) show another example of the metal pipe joint 10 of the present embodiment. The metal pipe joint 11 shown in FIG. 5A is called an elbow and is used when connecting two metal pipes in an L shape. The metal pipe joint 12 shown in FIG. 5 (b) is called cheese, and is used when connecting three metal pipes in a T-shape.
以上、本出願を特にその好ましい実施の形態を参照して詳細に説明した。 The present application has been described in detail with particular reference to the preferred embodiments thereof.
１０、１１、１２ 金属管継手
１ 胴部
１ａ 挿入孔
２ 押え部
２ａ 差込孔
３ ロックリング
３ａ 円板面
３ｂ 爪（規制片の一例）
３ｃ 挿通孔
４ 第１シール部材
５ 第２シール部材
Ｐ 金属管
DESCRIPTION OF SYMBOLS 10, 11, 12 Metal pipe joint 1 Barrel part 1a Insertion hole 2 Presser part 2a Insertion hole 3 Lock ring 3a Disc surface 3b Claw (an example of a regulation piece)
3c insertion hole 4 first seal member 5 second seal member P metal pipe
Claims (5)
前記金属管が挿入される挿入孔が形成された胴部と、
前記胴部内に同軸線上に内蔵される環状のロックリングであって、内方に突出して前記金属管の引き抜きを規制する規制片を複数備える、ロックリングと、
前記金属管が挿通する筒状の押え部であって、前記胴部の前記挿入孔に装着され、前記ロックリングを前記胴部に固定する押え部と、
前記押え部内に同軸線上に内蔵され、前記金属管が挿通されたときに前記金属管の管外面に接するよう設けられる環状の第１シール部材と、
を備える、金属管継手。 A metal pipe joint connecting metal pipes,
A body portion having an insertion hole into which the metal pipe is inserted;
An annular lock ring coaxially incorporated in the body portion, the lock ring including a plurality of restricting pieces projecting inward to restrict withdrawal of the metal pipe;
A tubular pressing portion through which the metal pipe is inserted, the pressing portion being attached to the insertion hole of the body and fixing the lock ring to the body;
An annular first seal member which is coaxially contained in the pressing portion and provided so as to be in contact with the outer surface of the metal pipe when the metal pipe is inserted;
, With metal fittings.
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| JP2017254800A JP2019120309A (en) | 2017-12-28 | 2017-12-28 | Metal tube joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017254800A JP2019120309A (en) | 2017-12-28 | 2017-12-28 | Metal tube joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2019120309A true JP2019120309A (en) | 2019-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2017254800A Pending JP2019120309A (en) | 2017-12-28 | 2017-12-28 | Metal tube joint |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021100291A1 (en) * | 2019-11-19 | 2021-05-27 | 株式会社タブチ | Pipe joint |
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