JP2020176665A - Pipe joint - Google Patents

Pipe joint Download PDF

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JP2020176665A
JP2020176665A JP2019078214A JP2019078214A JP2020176665A JP 2020176665 A JP2020176665 A JP 2020176665A JP 2019078214 A JP2019078214 A JP 2019078214A JP 2019078214 A JP2019078214 A JP 2019078214A JP 2020176665 A JP2020176665 A JP 2020176665A
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pipe
pipe material
core
diameter
main body
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一善 大橋
Kazuyoshi Ohashi
一善 大橋
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CK Riken JV Co Ltd
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CK Riken JV Co Ltd
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Abstract

To provide a pipe joint excellent in workability and reliability of piping connection.SOLUTION: A pipe joint includes an inner core inserted in the inside of a pair of pipe materials to be connected, and a body portion and a bag nut of a joint fastening the pair of pipe materials in which the inner core is inserted from the outside. The inner core has insertion portions respectively inserted in end portions of the pipe materials on both sides, and a stopper portion limiting insertion margins thereof. The insertion portions on both sides are arranged with an O-ring for sealing a gap between the pipe materials and the inside.SELECTED DRAWING: Figure 1

Description

本発明は配管接続に用いられる管継手に関し、特にインコアタイプの管継手に係る。 The present invention relates to a pipe joint used for pipe connection, and particularly to an in-core type pipe joint.

管材の端部同士を接続するのに両側の管材の端部内側にインコアを挿入し、管材の外側からおねじを形成した継手本体部と、めねじを形成した袋ナットとの螺合により締結する構造は公知である。
しかし、従来のこの種の管継手は、継手本体部と袋ナットとの間の締め付けに大きなトルクを有し、専用の大きな工具が必要となる問題があり、例えば狭い場所や高所での配管作業が大変であった。 To connect the ends of the pipe material, insert an in-core inside the ends of the pipe material on both sides, and fasten by screwing the joint body part with male threads formed from the outside of the pipe material and the bag nut with female threads formed. The structure to be used is known.
However, conventional pipe joints of this type have a problem that they have a large torque for tightening between the joint body and the bag nut and require a large dedicated tool. For example, piping in a narrow place or a high place. The work was hard.

例えば、特許文献１には管材の内側に挿入するコアに円錐面部を形成し、管材の外側からスリーブとキャップナットで締め付ける管接続具を開示するが、管材の端部をコアの円錐面部に沿って拡径変形させながら締め付けるものであることから、やはり締め付けトルクが大きくなることから、樹脂管等の変形しやすい材料からなる管材の接続に限られていた。
特許文献２は管材の端部に拡径したフレア部を用いて、内側に配設するシール部材とフレアナットにて締め付ける継手金具を開示するが、この場合に締め付け力を確保するためにフレアナットの内側にスリーブを設ける必要があり、やはり締め付けトルクが大きくなる。 For example, Patent Document 1 discloses a pipe connector in which a conical surface portion is formed in a core inserted inside a pipe material and tightened with a sleeve and a cap nut from the outside of the pipe material, but the end portion of the pipe material is along the conical surface portion of the core. Since the tightening is performed while expanding and deforming the diameter, the tightening torque is also large, so that the connection is limited to a pipe material made of a easily deformable material such as a resin pipe.
Patent Document 2 discloses a joint fitting that is fastened with a seal member and a flare nut arranged inside by using a flared portion having an enlarged diameter at the end of the pipe material. In this case, the flare nut is used to secure the tightening force. It is necessary to provide a sleeve on the inside of the, which also increases the tightening torque.

実開昭５９−２４５８５号公報Jitsukaisho 59-24585 Gazette 特開平１１−３２５３４１号公報Japanese Unexamined Patent Publication No. 11-325341

本発明は、配管接続の作業性及び信頼性に優れる管継手の提供を目的とする。 An object of the present invention is to provide a pipe joint having excellent workability and reliability of pipe connection.

本発明に係る管継手は、接続される一対の管材の内側に挿入されるインコアと、前記インコアが挿入された一対の管材を外側から相互に締結する継手の本体部と袋ナットとを備え、前記インコアは両側の管材の端部にそれぞれ挿入される挿入部と、その挿入代を制限したストッパー部とを有し、前記両側の挿入部は、それぞれ管材の内側との間をシールするＯリングが配設されていることを特徴とする。 The pipe joint according to the present invention includes an in-core inserted inside a pair of pipe materials to be connected, and a main body and a cap nut of the joint for fastening the pair of pipe materials into which the in-core is inserted to each other from the outside. The in-core has an insertion portion to be inserted into each end of the pipe material on both sides and a stopper portion for limiting the insertion allowance, and the insertion portion on both sides seals between the inside of the pipe material and the O-ring. Is arranged.

ここで、インコアの両側に設けた挿入部に接続する一対の管材の端部をそれぞれ装着し、一方の管材の外周部に配置した継手の本体部と、他方の管材の外周部に配置した袋ナットの螺合により配管接続されることになる。 Here, the end portions of the pair of pipe materials connected to the insertion portions provided on both sides of the in-core are attached to each other, and the main body portion of the joint arranged on the outer peripheral portion of one pipe material and the bag arranged on the outer peripheral portion of the other pipe material. The pipes will be connected by screwing the nuts.

本発明において、接続される管材の端部は内径が拡径された拡径部を有し、前記インコアの挿入部は前記管材の拡径部に沿って挿入されることでインコアの流路径による流体の圧損を抑えたものでもよい。
ここで、インコアの挿入部の長さは管材の拡径部の深さと同等か、それよりもやや短い方が好ましい。
このようにすると拡径された拡径部の内側に合せてインコアの外径を管材の一般部の内径よりも大きくできるので、管材に拡径部を設けない場合と比較して、インコアの内側の流路径を大きくすることができるので、流体の圧損を抑えることができる。 In the present invention, the end portion of the connected pipe material has a diameter-expanded portion whose inner diameter is expanded, and the insertion portion of the in-core is inserted along the diameter-expanded portion of the pipe material, whereby the flow path diameter of the in-core The pressure loss of the fluid may be suppressed.
Here, it is preferable that the length of the insertion portion of the in-core is equal to or slightly shorter than the depth of the enlarged diameter portion of the pipe material.
In this way, the outer diameter of the in-core can be made larger than the inner diameter of the general part of the pipe material in accordance with the inside of the expanded diameter portion, so that the inside of the in-core is compared with the case where the pipe material is not provided with the enlarged diameter portion. Since the diameter of the flow path can be increased, the pressure loss of the fluid can be suppressed.

本発明において、前記本体部又は／及び袋ナットは、管材の挿入孔と前記挿入孔の内径を縮小した段差状の係止部を有し、前記係止部は、前記管材の拡径基部側に設けた被係止部に係止することで、管材の抜け止めとして機能するようにしてもよい。
本発明に係る管継手は、インコアの外周面と管材の内周面との間のシール性をＯリングにて確保しているので、継手の本体部と袋ネットを強く締め付ける必要がない。
管材の端部を拡径すると、拡径部の基部側に段差部やテーパー部が形成される。
そこで、継手の本体部や袋ナットの内側に縮径した段差部を形成した場合には、管材が抜けようとすると、この拡径基部が本体部や袋ナットの段差部に当たり、それ以上管材が抜けようとするのを防止できる。 In the present invention, the main body and / and the bag nut have an insertion hole for the pipe material and a stepped locking portion in which the inner diameter of the insertion hole is reduced, and the locking portion is on the diameter-expanding base side of the pipe material. By locking to the locked portion provided in the above, the pipe material may function as a stopper.
In the pipe joint according to the present invention, since the sealing property between the outer peripheral surface of the in-core and the inner peripheral surface of the pipe material is secured by the O-ring, it is not necessary to strongly tighten the main body of the joint and the bag net.
When the diameter of the end portion of the pipe material is increased, a stepped portion or a tapered portion is formed on the base side of the enlarged diameter portion.
Therefore, when a stepped portion with a reduced diameter is formed inside the main body of the joint or the bag nut, when the pipe material tries to come off, this diameter-expanding base hits the stepped portion of the main body or the bag nut, and the pipe material further increases. You can prevent it from coming off.

本発明に係る管継手は、インコアの外周部に設けたＯリングにてシール性が確保されるので、インコアの両側に一対の管材をそれぞれ装着し、継手の本体部と袋ナットはインコアから管材が抜けるのを防止できる程度の締め付け力しか必要としない。
これにより、小さなスパナ等の工具を用いて小さいトルクで配管接続でき、作業性に優れる。
また、特許文献１，２等に開示された継手は強く締め付けてあるので、接続後に管材を回すことができないのに対して、本発明に係る管継手は接続後であっても管材をインコアのＯリング廻りに回転調整することもできる。 In the pipe joint according to the present invention, since the sealing property is ensured by the O-ring provided on the outer peripheral portion of the in-core, a pair of pipe materials are attached to both sides of the in-core, and the main body and the bag nut of the joint are the pipe materials from the in-core. Only a tightening force is required to prevent the nut from coming off.
As a result, it is possible to connect pipes with a small torque using a tool such as a small spanner, and the workability is excellent.
Further, since the joints disclosed in Patent Documents 1, 2 and the like are strongly tightened, the pipe material cannot be turned after the connection, whereas the pipe joint according to the present invention has the pipe material in-core even after the connection. The rotation can be adjusted around the O-ring.

本発明に係る管継手を用いた配管接続の流れを（ａ）〜（ｄ）に示す。The flow of pipe connection using the pipe joint according to the present invention is shown in (a) to (d). （ａ）に管継手の分解図を示し、（ｂ）に管材の接続後の外観を示す。(A) shows an exploded view of the pipe joint, and (b) shows the appearance of the pipe material after connection. 継手の本体部の例を示し、（ａ）は側面図（ｂ）は正面図（ｃ）はＡ−Ａ線断面図を示す。An example of the main body of the joint is shown, (a) is a side view (b), and (c) is a front view (c) is a sectional view taken along line AA. 袋ナットの例を示し、（ａ）は側面図（ｂ）は正面図（ｃ）はＢ−Ｂ線断面図を示す。An example of a bag nut is shown, (a) is a side view (b), and (c) is a front view (CB). インコアの例を示し、（ａ）は正面図（ｂ）は側面図（ｃ）はＣ−Ｃ線断面図を示す。An example of an in-core is shown, (a) is a front view (b), and a side view (c) is a sectional view taken along line CC.

本発明に係る管継手の構造例として以下、図に基づいて説明する。
図２に管材の形状及び管継手の分解図を示し、図３に継手の本体部、図４に袋ナット、図５にインコアをそれぞれ示し、これらを参考にしつつ、図１の断面図に基づいて説明する。 A structural example of the pipe joint according to the present invention will be described below with reference to the drawings.
FIG. 2 shows the shape of the pipe material and an exploded view of the pipe joint, FIG. 3 shows the main body of the joint, FIG. 4 shows the bag nut, and FIG. 5 shows the in-core, respectively, based on the cross-sectional view of FIG. I will explain.

本発明に係る管継手を用いる場合には、管材１の端部にストレート状の拡径部１ａを形成するのが好ましい。
管材１がアルミ製、銅製等であれば簡単に拡径するための工具が市販されている。 When the pipe joint according to the present invention is used, it is preferable to form a straight diameter-expanded portion 1a at the end of the pipe material 1.
If the pipe material 1 is made of aluminum, copper, or the like, a tool for easily expanding the diameter is commercially available.

管継手は一対の管材の接続部の内側に挿入されるインコア３０と、一方の管材１の外周部に予め装着される本体部１０と他方の管材１の外周部に予め装着される袋ナット２０を有する。 The pipe joint includes an in-core 30 inserted inside the connection portion of the pair of pipe materials, a main body portion 10 pre-mounted on the outer peripheral portion of one pipe material 1, and a bag nut 20 pre-mounted on the outer peripheral portion of the other pipe material 1. Has.

インコア３０は外周部の中央部側に突設したリング形状のストッパー部３２を有し、その両側に挿入部３１，３１を有する。
挿入部３１にはそれぞれ、Ｏリング４０が装着凹部を介して装着されている。
管材１の拡径部１ａは、このインコアの挿入部３１に沿って、この外周側に装着されるが、管材１の先端部１ｂがインコア側のストッパー部３２に当接すると、それ以上、挿入されないように規制されている。
本実施例ではストッパー部３２が中央部に１つだけリング状に形成されているが、左右の管材１に合せて、それぞれ別にストッパー部を設けてもよい。
また本実施例では、図５（ｃ）に示すように挿入部３１からストッパー部３２に向けてテーパー状に拡径したテーパー部３１ａを形成した例になっている。 The in-core 30 has a ring-shaped stopper portion 32 projecting from the central portion side of the outer peripheral portion, and has insertion portions 31 and 31 on both sides thereof.
An O-ring 40 is mounted on each of the insertion portions 31 via a mounting recess.
The enlarged diameter portion 1a of the pipe material 1 is mounted on the outer peripheral side along the insertion portion 31 of the in-core, but when the tip portion 1b of the pipe material 1 comes into contact with the stopper portion 32 on the in-core side, it is further inserted. It is regulated not to be done.
In this embodiment, only one stopper portion 32 is formed in a ring shape in the central portion, but stopper portions may be provided separately according to the left and right pipe materials 1.
Further, in this embodiment, as shown in FIG. 5C, the tapered portion 31a having a tapered diameter expanded from the insertion portion 31 toward the stopper portion 32 is formed.

管継手の本体部１０は、外周部におねじ部１１を有し、内側に管材１の挿入孔１２を有し、この挿入孔１２の内側であって、おねじ部１１とは反対の端部側に段差状に縮径した本体係止部１３を有する。
図１に示すように挿入孔１２の内径は、管材１の拡径部の外径と同等か、やや大きくなっている。
また、本体係止部１３の位置は、図１（ｃ），（ｄ）に示すように配管接続後に管材１の拡径部１ｂの基部側の被係止部１ｃの近傍に位置する。
本体部１０の外周部には、スパナ等で締め込むためのフラット部（本体）１４を対向して有する。 The main body portion 10 of the pipe joint has a threaded portion 11 on the outer peripheral portion and an insertion hole 12 for the pipe material 1 on the inside, and is an end inside the insertion hole 12 opposite to the male threaded portion 11. It has a main body locking portion 13 whose diameter is reduced in a stepped shape on the portion side.
As shown in FIG. 1, the inner diameter of the insertion hole 12 is equal to or slightly larger than the outer diameter of the enlarged diameter portion of the pipe material 1.
Further, as shown in FIGS. 1 (c) and 1 (d), the position of the main body locking portion 13 is located in the vicinity of the locked portion 1c on the base side of the enlarged diameter portion 1b of the pipe material 1 after the pipe is connected.
A flat portion (main body) 14 for tightening with a spanner or the like is provided on the outer peripheral portion of the main body portion 10 so as to face each other.

袋ナット２０は、内側に管材１の挿入孔２２とめねじ部２１を有する。
めねじ部２１とは反対側の挿入孔２２端部には、段差状に縮径したナット係止部２３を有し、その位置は図１（ｃ），（ｄ）に示すように配管接続後に管材１の拡径部１ｂの基部側の被係止部１ｃの近傍に位置する。
袋ナット２０は、スパナ等で締め込むための対向したフラット部２４と、管材の接続状態を目視で確認できるための貫通した確認孔２５を有する。 The bag nut 20 has an insertion hole 22 for the pipe material 1 and a female thread portion 21 inside.
At the end of the insertion hole 22 on the opposite side of the female thread portion 21, there is a nut locking portion 23 whose diameter is reduced in a stepped shape, and the position thereof is pipe connection as shown in FIGS. Later, it is located in the vicinity of the locked portion 1c on the base side of the enlarged diameter portion 1b of the pipe material 1.
The bag nut 20 has an opposed flat portion 24 for tightening with a spanner or the like, and a penetrating confirmation hole 25 for visually confirming the connection state of the pipe material.

図１（ａ），（ｂ）に示すように、インコア３０の両側に有する挿入部３１の外周部に沿って、両側から管材１の拡径部１ａをそれぞれ挿入する。
一方の管材１の外周部には、本体部１０を予め装着したり、他方の管材１の外周部には袋ナット２０を予め装着してある。
なお、必要に応じて管材１の拡径部を拡径する前に、本体部１０及び袋ナット２０を装着する。 As shown in FIGS. 1A and 1B, the enlarged diameter portions 1a of the pipe material 1 are inserted from both sides along the outer peripheral portions of the insertion portions 31 provided on both sides of the incore 30.
The main body 10 is pre-mounted on the outer peripheral portion of one pipe material 1, and the bag nut 20 is pre-mounted on the outer peripheral portion of the other pipe material 1.
If necessary, the main body portion 10 and the bag nut 20 are attached before the diameter-expanded portion of the pipe material 1 is expanded.

次に、図１（ｃ）に示すように本体部１０のおねじ部１１と、袋ナット２０のめねじ部２１を相互に締め込み、螺合する。
この際に、締め込む力は管材１の拡径部１ｂの内周面とインコア３０の挿入部３１の外周面との間は、Ｏリングとの摺接力に近いものであることから、大きな締め付け力は不要である。
管材１の先端部１ｂの挿入代は、ストッパー３２にて規制されるとともに、管材１に抜け方向の力が作用する場合には、管材１の拡径部の基部に有する被係止部１ｃが本体部１０の本体係止部１３及び袋ナット２０のナット係止部２３に係止されるので、それ以上管材１が抜け出すことはない。
本実施例では、インコア３０のストッパー部３２の根元側にテーパー部３１ａを有するので、本体部１０と袋ナット２０との間の締付トルクの確認ができるとともに、適正に接続された場合には、ストッパー部３２が確認孔２５から目視で確認できる。 Next, as shown in FIG. 1C, the threaded portion 11 of the main body portion 10 and the female threaded portion 21 of the bag nut 20 are mutually tightened and screwed.
At this time, the tightening force is large because the tightening force is close to the sliding contact force with the O-ring between the inner peripheral surface of the enlarged diameter portion 1b of the pipe material 1 and the outer peripheral surface of the insertion portion 31 of the incore 30. No force is required.
The insertion allowance of the tip portion 1b of the pipe material 1 is regulated by the stopper 32, and when a force in the pulling direction acts on the pipe material 1, the locked portion 1c held at the base of the enlarged diameter portion of the pipe material 1 Since it is locked to the main body locking portion 13 of the main body portion 10 and the nut locking portion 23 of the bag nut 20, the pipe material 1 does not come out any more.
In this embodiment, since the tapered portion 31a is provided on the root side of the stopper portion 32 of the in-core 30, the tightening torque between the main body portion 10 and the bag nut 20 can be confirmed, and when properly connected, it can be confirmed. , The stopper portion 32 can be visually confirmed from the confirmation hole 25.

本発明に係る管継手を用いた配管の接続構造にあっては、管材１の一般部の内径ｄ０に対して、インコア３０への装着部となる拡径部の内径ｄ１の方が大きい。
これによりインコア３０は、強度に必要な肉厚を確保しつつ、管材１の拡径部の内側に納まるだけの図５（ｃ）に示した流路径ｄ２を確保することができる。
これにより図１（ｃ）に示すように、インコア３０の流路径ｄ２を管材１の一段内径ｄ０に近づけることができ、流体の圧損を小さくすることができる。
理想的には、インコア３０の流路径ｄ２が一般内形ｄ０と同等であるのが好ましい。 In the pipe connection structure using the pipe joint according to the present invention, the inner diameter d 1 of the enlarged diameter portion to be mounted on the in-core 30 is larger than the inner diameter d 0 of the general portion of the pipe material 1. ..
As a result, the in-core 30 can secure the flow path diameter d 2 shown in FIG. 5 (c), which is sufficient to fit inside the enlarged diameter portion of the pipe material 1, while ensuring the wall thickness required for strength.
As a result, as shown in FIG. 1 (c), the flow path diameter d 2 of the in-core 30 can be brought close to the one-step inner diameter d 0 of the pipe material 1, and the pressure loss of the fluid can be reduced.
Ideally, it is preferable that the flow path diameter d 2 of the in-core 30 is equivalent to that of the general inner shape d 0 .

本発明に係る管継手は、従来のような大きな締付トルクが不要であるため、大きな工具が不要であり、狭い場所等でも配管作業ができる。
また、管継手の軽量化が可能であり、アルミ等の材質で製作することもできる。 Since the pipe joint according to the present invention does not require a large tightening torque as in the conventional case, a large tool is not required, and piping work can be performed even in a narrow place or the like.
In addition, the weight of the pipe joint can be reduced, and it can be manufactured of a material such as aluminum.

１ 管材
１ａ 拡径部
１ｂ 先端部
１ｃ 被係止部
１０ 本体部
１１ おねじ部
１２ 挿入孔（本体）
１３ 本体係止部
１４ フラット部（本体）
２０ 袋ナット
２１ めねじ部
２２ 挿入孔（ナット）
２３ ナット係止部
２４ フラット部（ナット）
２５ 確認孔
３０ インコア
３１ 挿入部
３２ ストッパー部
４０ Ｏリング 1 Pipe material 1a Diameter expansion part 1b Tip part 1c Locked part 10 Main body part 11 Male thread part 12 Insertion hole (main body)
13 Main body locking part 14 Flat part (main body)
20 Bag nut 21 Female thread 22 Insertion hole (nut)
23 Nut locking part 24 Flat part (nut)
25 Confirmation hole 30 Incore 31 Insertion part 32 Stopper part 40 O-ring

Claims (3)

接続される一対の管材の内側に挿入されるインコアと、
前記インコアが挿入された一対の管材を外側から相互に締結する継手の本体部と袋ナットとを備え、
前記インコアは両側の管材の端部にそれぞれ挿入される挿入部と、その挿入代を制限したストッパー部とを有し、
前記両側の挿入部は、それぞれ管材の内側との間をシールするＯリングが配設されていることを特徴とする管継手。 An in-core inserted inside a pair of connected pipes,
It is provided with a main body of a joint and a bag nut for fastening the pair of pipe materials into which the in-core is inserted to each other from the outside.
The in-core has an insertion portion to be inserted into each end of the pipe material on both sides, and a stopper portion for limiting the insertion allowance.
A pipe joint characterized in that each of the insertion portions on both sides is provided with an O-ring that seals between the inside of the pipe material. 接続される管材の端部は内径が拡径された拡径部を有し、
前記インコアの挿入部は前記管材の拡径部に沿って挿入されることでインコアの流路径による流体の圧損を抑えたことを特徴とする請求項１記載の管継手。 The end of the connected pipe material has an enlarged diameter portion with an enlarged inner diameter.
The pipe joint according to claim 1, wherein the insertion portion of the in-core is inserted along the enlarged diameter portion of the pipe material to suppress pressure loss of the fluid due to the flow path diameter of the in-core. 前記本体部又は／及び袋ナットは、管材の挿入孔と前記挿入孔の内径を縮小した段差状の係止部を有し、
前記係止部は、前記管材の拡径基部側に設けた被係止部に係止することで、管材の抜け止めとして機能することを特徴とする請求項２記載の管継手。 The main body and / and the bag nut have an insertion hole for a pipe material and a stepped locking portion in which the inner diameter of the insertion hole is reduced.
The pipe joint according to claim 2, wherein the locking portion functions as a stopper for the pipe material by locking the locked portion provided on the diameter-expanding base side of the pipe material.
JP2019078214A 2019-04-17 2019-04-17 Pipe joint Pending JP2020176665A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6976017B1 (en) * 2021-07-05 2021-12-01 井上スダレ株式会社 Pipe fitting structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6976017B1 (en) * 2021-07-05 2021-12-01 井上スダレ株式会社 Pipe fitting structure

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