JP4200598B2 - Pipe fitting - Google Patents

Pipe fitting Download PDF

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Publication number
JP4200598B2
JP4200598B2 JP19625099A JP19625099A JP4200598B2 JP 4200598 B2 JP4200598 B2 JP 4200598B2 JP 19625099 A JP19625099 A JP 19625099A JP 19625099 A JP19625099 A JP 19625099A JP 4200598 B2 JP4200598 B2 JP 4200598B2
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JP
Japan
Prior art keywords
core
diameter
fluid pipe
pipe
reduced
Prior art date
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Expired - Fee Related
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JP19625099A
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Japanese (ja)
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JP2001021075A (en
Inventor
強道 高村
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Cosmo Koki Co Ltd
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Cosmo Koki Co Ltd
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Priority to JP19625099A priority Critical patent/JP4200598B2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00Joints with sleeve or socket

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Sleeves (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、例えばポリエチレン等の軟質合成樹脂製の水道管、ガス管、プラント用配管の接続に使用される管継手に関する。
【0002】
【従来の技術】
従来、この種の流体管の管継手として特開平10−122459に開示されているものが知られている。(図6)
【0003】
この従来の管継手Aは、継手本体Bと流体管CおよびインコアDより成り、継手本体Bの受口部B1の開口端近傍にはパッキン収容部B2が形成され、パッキン収容部B2の奥部には断面が略コ状のリング収容部B3が形成されている。
【0004】
そして、パッキン収容部B2にパッキンEが収容され、リング収容部B3に芯出し部材Fおよび離脱防止リングGが収容された状態で、受口部B1内に流体管Cの挿口部C1が挿入される。
【0005】
挿口部C1には、挿口部C1からの離脱を防止するために挿口部C1の内径よりやや大きい外径に形成されたインコアDが挿入されている。
【0006】
インコアDは、パッキンEや離脱防止リングGによる縮径方向の力が作用する挿口部C1の変形を防止するために装着されている。
【0007】
このインコアDが装着される流体管Cは、ポリエチレン管等の軟質合成樹脂管であって、その製造方法や材質の特性によって管径や管厚のばらつきが大きく、軟質合成樹脂管各規格における管径や管厚は、公差が大きく規定されている。
【0008】
【発明が解決しようとする課題】
このような従来の管継手におけるインコアは、装着した流体管からの抜け出しを防止するために、公差を見込した流体管の最大内径よりも大きな外径に形成されていた。
【0009】
従って、流体管の接合作業時には、流体管の内径よりも大きな外径のインコアを流体管内周部に挿入することになり、インコアは流体管を押し拡げるようにして挿入されていた。よって、インコアを装着するのに大きな力を必要とし、ハンマーで叩き込んだりしており、流体管の反発力で抜け出してきたりし、所定の位置に装着するのが困難であったりし、作業時間を多く必要としていた。
【0010】
本発明が解決しようとする課題は、上記問題を解決するためになされたもので、流体管に装着しやすいインコアの管継手を提供する点にある。
【0011】
【課題を解決するための手段】
上記課題を解決するために、本発明の管継手は、インコアを端部の内周面に嵌合した流体管と、パッキンを装着した受口部に前記流体管の端部が水密に挿入された継手本体とからなる管継手であって、前記インコアは、薄肉円筒形に形成され、半径方向に弾性縮径可能にする間隔が周方向に設けられ、前記縮径を規制する規制装置が設けられているとともに、前記規制装置には前記インコアの周方向の端部同士の重なりを防止する阻止部が設けられていることを特徴としている。
この特徴により、インコアには周方向に間隙が設けられているので、流体管に装着する際に縮径させて挿入することがでる。よって、挿入に際しての抵抗が小さいので装着が容易となり作業時間が短縮される。また、インコアは弾性縮径されているので、装着後には復元し、流体管の内周面に圧接するので流体管からの抜け出しが防止され、装着位置の保持がなされ安定固定される。
【0012】
更に、流体管に縮径方向の力が作用したときには、インコアは所定の径まで縮径するが規制装置により縮径が規制されるのでそれ以上の縮径が防止され、流体管の縮径を防止することができる。また、インコアの規制装置は、周方向の端部同士の重なりを防止する阻止部が設けられているので、周方向の端部同士の重なりを阻止部で防止することができるので、確実にインコアの縮径を防止することができる。
【0013】
前記インコアの規制装置は、周方向の一端部に、他端部が当接して縮径が規制される係止部が設けられているのが好ましい。
このようにすると、インコアの周方向の一端部に係止部が設けられ、他端部が係止部に当接するので縮径が規制され更なる変形が確実に防止される。
【0015】
【発明の実施の形態】
以下、本発明の実施例を図面に基づいて説明する。
図1、2は、本発明の管継手1を用いてポリエチレン製の流体管2、2を接合した第1実施例を示している。
【0016】
同図において、3は、ダクタイル鋳鉄製の継手本体、4は、継手本体3に締結される押輪、5は、押輪4の内周面に配置されるロックリング、6は、流体管2を継手本体3に水密に接合するパッキン、7は、パッキン6を押圧するリテーナ、8は、流体管2の端部内周に装着されたインコアである。
【0017】
継手本体3の内面中央には中心方向に突出したストッパー3dが設けられ、継手本体3の両端部分には、パッキン6が収容される拡径部3aが形成され、その外面にはフランジ3bが連設されており、拡径部3aの端部にはリテーナ7が当接してその移動を防止する当接部3cが設けられている。
【0018】
継手本体3の外周面に設けられたフランジ3bには、押輪4のフランジ4bが複数のT頭ボルト15とナット16により取り付けられ、ロックリング5は、押輪4の内テーパ面4aにより締め付けられている。
【0019】
ロックリング5は、流体管2よりも硬質の合成樹脂、例えばアセタール樹脂等やステンレス等の金属体からなる1つ割りの形状をしており、縮径させても元の形状に戻る弾性を有し、その断面形状は、外周面は押輪4の内テーパ面4aとほぼ同じ傾斜の外テーパ面5aが形成され、その最大外径は内テーパ面の最大内径より大きく設定され、内周面には、円周方向を向く複数の刃5bが形成されている。
【0020】
インコア8は、図3に示すように自然の状態での外径が流体管2の内径よりも若干大きめの薄肉円筒状に形成された本体8aと、一方の端部に外径方向に突出した鍔部8bと、他方の端部に外径が徐々に縮小する小径部8cとで構成されている。
インコア8は周方向で切断され、端部8d、8eが所定の間隔で設けられており、間隙8fが形成されている。また、縮径させても元の状態に戻る弾性を持たされている。
【0021】
上記実施例の管継手1を用いて、流体管2を接合するには、まず、接合する流体管2の端部に鍔部8bが当接するまでインコア8を挿入する。
【0022】
次に、フランジ3bとフランジ4bにT頭ボルト15を挿し通しナット16を仮締めし、ロックリング5とリテーナ7とが内部に装着された押輪4をパッキン6が拡径部3aに挿入された継手本体3に仮止めする。
【0023】
ついで、インコア8が内部に装着された流体管2を継手本体3に仮止めされた押輪4の端部よりストッパー3cに当接するまで挿入し、仮締めしてあるナット16をフランジ3bとフランジ4bが当接するまで均等に締め付けて接合を完了する。
【0024】
流体管2の端部にインコア8を装着する際には、間隙8fが形成されているインコア8に力を加えて縮径させて流体管2に挿入することができるので、容易に作業が行なえ、作業時間を短縮することができる。
【0025】
また、インコア8は弾性を持っているので、縮径させていた力を除くと拡径して流体管2の内周面に密着するので流体管8より抜け落ちたりすることがなく安定的に装着することができる。
【0026】
図4は、本発明の第2実施例のインコア9を示し、継手本体3、押輪4、ロックリング5、パッキン6、リテーナ7等が第1実施例とほぼ同様に構成され管継手で使用される。
【0027】
インコア9は、自然の状態での外径が流体管2の内径よりも若干大きめの薄肉円筒状に形成されており、周方向で切断され、端部9a、9bが設けられるとともに縮径させても元の状態に戻る弾性を持たされている。
【0028】
一方の端部9aには、中心方向に突出した係止部9cと阻止部9dで略L形に形成された規制装置13が所定の間隔を空けて3箇所設けられており、他端部9bが端部9aと規制装置13の間に嵌合されている。
【0029】
上記第2実施例のインコア9を用いた管継手1で、流体管2を接続するには、第1実施例と同様な方法で行われる。
【0030】
流体管2の端部にインコア9を装着する際には、端部9bが係止部9cに当接するまで縮径させて流体管2に挿入することができるので、容易に作業が行なえ、作業時間を短縮することができる。
【0031】
また、インコア9は弾性を持っているので、縮径させていた力を除くと拡径して流体管2の内周面に密着するので流体管2より抜け落ちたりすることがなく安定的に装着することができる。
【0032】
流体管2と継手本体3とが相対移動し、ロックリング5が縮径して、流体管2に縮径方向の力が働いた場合、インコア9は係止部9aに端部9bが当接して縮径が規制され流体管2の縮径を防止する。また、端部9bが径の中心方向に移動するのを阻止部9cが防止して流体管2の縮径を防止する。
【0033】
図5は、本発明の第3実施例のインコア10を示し、継手本体3、押輪4、ロックリング5、パッキン6、リテーナ7等が第1実施例とほぼ同様に構成され管継手で使用される。
【0034】
インコア10は、周方向で切断され、端部10a、10bが所定の間隔で設けられており、間隙10cが形成されるとともに縮径させても元の状態に戻る弾性を持たされている。
【0035】
間隙10cには、端部10a、10bが当接して縮径を規制する係止部11と、端部10a、10bが中心方向および反中心方向へ移動するのを防止する阻止部12,12とにより断面略H形に形成された規制装置14が嵌合されている。
【0036】
上記第3実施例のインコア10を用いた管継手1で、流体管2を接続するには、第1実施例と同様な方法で行われる。
【0037】
流体管2の端部にインコア10を装着する際には、端部10a、10bが係止部11に当接するまで縮径させ、流体管2の内径よりも小径にして挿入することができるので、容易に作業が行なえ、作業時間を短縮することができる。
【0038】
また、インコア10は弾性を持っているので、縮径させていた力を除くと拡径して流体管2の内周面に密着し、流体管2より抜け落ちたりすることがなく、装着位置を決めることが容易となり安定的な装着ができる。
【0039】
流体管2と継手本体3とが相対移動し、ロックリング5が縮径して、流体管2に縮径方向の力が働いた場合、インコア10は係止部11に端部10a、10bが当接して縮径が規制され流体管2の縮径を防止する。また、端部10a、10bが径の中心方向に移動するのを阻止部12が当接して流体管2の縮径を防止する。
【0040】
以上、本発明の実施例を図面により説明してきたが、本発明の具体的な構成はこれに限定されるものではない。
【0041】
実施例では、押輪やロックリングが設けられた管継手であったが、押輪やロックリングがない挿し込み式の管継手であってもよい。
【0042】
【発明の効果】
本発明によれば、インコアには周方向に間隙が設けられているので、流体管に装着する際に縮径させて挿入することがでので、挿入に際しての抵抗が小さく装着が容易となり作業時間が短縮される。
また、インコアは弾性縮径されているので、装着後には復元し、流体管の内周面に圧接するので流体管からの抜け出しが防止され、装着位置の保持がなされ安定固定される。
【0043】
また、流体管に縮径方向の力が作用したときには、インコアは所定の径まで縮径するが規制装置により縮径が規制されるのでそれ以上の縮径が防止され、流体管の縮径を防止することができる。更に、インコアの規制装置は、周方向の端部同士の重なりを防止する阻止部が設けられているので、周方向の端部同士の重なりを阻止部で防止することができるので、確実にインコアの縮径を防止することができる。
【0044】
請求項の発明によれば、インコアの周方向の一端部に係止部が設けられ、他端部が係止部に当接するので縮径が規制され更なる変形が確実に防止される。
【図面の簡単な説明】
【図1】本発明の第1実施例を示す断面図である。
【図2】同じく、側面図である。
【図3】同じく、インコアの(a)は正面図、(b)は側面図である。
【図4】本発明の第2実施例のインコアであり、(a)は正面図、(b)は側面図、(c)は1−1断面図である。
【図5】本発明の第3実施例のインコアであり、(a)は正面図、(b)は側面図、(c)は規制装置の側面図である。
【図6】従来例を示す断面図aである。
【符号の説明】
1 管継手
2 流体管
3 継手本体
3a 拡径部
3b フランジ
3c 当接部
3d ストッパー
4 押輪
4a 内テーパ面
4b フランジ
5 ロックリング
5a 外テーパ面
5b 刃
6 パッキン
7 リテーナ
8 インコア
8a 本体
8b 鍔部
8c 小径部
8d,8e 端部
8f 間隙
9 インコア
9a、9b 端部
9c 係止部
9d 阻止部
10 インコア
10a、10b 端部
10c 間隙
11 係止部
12 阻止部
13、14 規制装置
15 T頭ボルト
16 ナット
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe joint used for connection of water pipes, gas pipes, and plant pipes made of a soft synthetic resin such as polyethylene.
[0002]
[Prior art]
Conventionally, as a pipe joint of this kind of fluid pipe, what is disclosed in JP-A-10-122459 is known. (Fig. 6)
[0003]
This conventional pipe joint A is composed of a joint body B, a fluid pipe C and an in-core D, and a packing housing part B2 is formed in the vicinity of the opening end of the receiving part B1 of the joint body B, and the inner part of the packing housing part B2 Is formed with a ring accommodating portion B3 having a substantially U-shaped cross section.
[0004]
The insertion portion C1 of the fluid pipe C is inserted into the receiving portion B1 in a state where the packing E is accommodated in the packing accommodating portion B2 and the centering member F and the separation preventing ring G are accommodated in the ring accommodating portion B3. Is done.
[0005]
An in-core D formed with an outer diameter slightly larger than the inner diameter of the insertion portion C1 is inserted into the insertion portion C1 in order to prevent detachment from the insertion portion C1.
[0006]
The in-core D is mounted in order to prevent deformation of the insertion portion C1 to which a force in the diameter reducing direction due to the packing E or the separation preventing ring G acts.
[0007]
The fluid pipe C to which the in-core D is attached is a soft synthetic resin pipe such as a polyethylene pipe, and has a large variation in pipe diameter and pipe thickness depending on the manufacturing method and material characteristics. Tolerances for diameters and tube thickness are largely defined.
[0008]
[Problems to be solved by the invention]
The in-core in such a conventional pipe joint is formed to have an outer diameter larger than the maximum inner diameter of the fluid pipe that allows for tolerance in order to prevent the fluid pipe from being attached.
[0009]
Therefore, when the fluid pipe is joined, an incore having an outer diameter larger than the inner diameter of the fluid pipe is inserted into the inner circumference of the fluid pipe, and the incore is inserted so as to expand the fluid pipe. Therefore, a large force is required to install the in-core, it is struck with a hammer, it is pulled out by the repulsive force of the fluid pipe, and it is difficult to install in place, and the work time is reduced. I needed a lot.
[0010]
The problem to be solved by the present invention is to solve the above problems, and is to provide an in-core pipe joint that is easy to attach to a fluid pipe.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problems, the pipe joint of the present invention includes a fluid pipe in which an in-core is fitted to an inner peripheral surface of an end part, and an end part of the fluid pipe inserted in a watertight manner into a receiving part to which a packing is attached. The in-core is formed in a thin cylindrical shape, and is provided with an interval in the circumferential direction that enables elastic diameter reduction in the radial direction, and a regulating device that regulates the diameter reduction is provided. In addition, the restricting device is provided with a blocking portion for preventing the end portions of the in-core in the circumferential direction from overlapping each other .
Because of this feature, the in-core is provided with a gap in the circumferential direction, so that it can be inserted with a reduced diameter when mounted on the fluid pipe. Therefore, since the resistance at the time of insertion is small, mounting becomes easy and the working time is shortened. Further, since the in-core is elastically reduced in diameter, it is restored after being mounted and is brought into pressure contact with the inner peripheral surface of the fluid pipe, so that it is prevented from coming out of the fluid pipe, and the mounting position is held and stably fixed.
[0012]
Further, when a force in the direction of diameter reduction acts on the fluid pipe, the in-core is reduced in diameter to a predetermined diameter, but the diameter reduction is restricted by the regulating device, so that further diameter reduction is prevented and the diameter of the fluid pipe is reduced. Can be prevented. In addition, since the in-core regulating device is provided with a blocking portion that prevents the end portions in the circumferential direction from overlapping each other, the overlapping portion between the end portions in the circumferential direction can be prevented by the blocking portion, so Can be prevented.
[0013]
It is preferable that the in-core regulating device is provided with a locking portion whose one end in the circumferential direction abuts on the other end and whose diameter is regulated.
If it does in this way, since a latching | locking part is provided in the one end part of the circumferential direction of an in-core, and the other end part contact | abuts a latching | locking part, diameter reduction is controlled and the further deformation | transformation is prevented reliably.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 show a first embodiment in which polyethylene fluid pipes 2 and 2 are joined using a pipe joint 1 of the present invention.
[0016]
In the figure, 3 is a joint body made of ductile cast iron, 4 is a push ring fastened to the joint body 3, 5 is a lock ring disposed on the inner peripheral surface of the push ring 4, and 6 is a joint of the fluid pipe 2. A packing that is watertightly joined to the main body 3, 7 is a retainer that presses the packing 6, and 8 is an in-core that is attached to the inner periphery of the end of the fluid pipe 2.
[0017]
A stopper 3d that protrudes in the center direction is provided at the center of the inner surface of the joint body 3, and an enlarged diameter portion 3a that accommodates the packing 6 is formed at both ends of the joint body 3, and a flange 3b is connected to the outer surface of the joint body 3. An abutting portion 3c is provided at the end of the enlarged diameter portion 3a to prevent the retainer 7 from abutting and moving.
[0018]
The flange 4b of the press ring 4 is attached to the flange 3b provided on the outer peripheral surface of the joint body 3 by a plurality of T-head bolts 15 and nuts 16, and the lock ring 5 is tightened by the inner tapered surface 4a of the press ring 4. Yes.
[0019]
The lock ring 5 has a single-piece shape made of a synthetic resin harder than the fluid pipe 2, such as acetal resin or stainless steel, and has elasticity that returns to its original shape even when the diameter is reduced. The outer peripheral surface is formed with an outer tapered surface 5a having substantially the same inclination as the inner tapered surface 4a of the pusher wheel 4, and the maximum outer diameter is set larger than the maximum inner diameter of the inner tapered surface. Are formed with a plurality of blades 5b facing in the circumferential direction.
[0020]
As shown in FIG. 3, the in-core 8 has a main body 8a formed in a thin cylindrical shape whose outer diameter in a natural state is slightly larger than the inner diameter of the fluid pipe 2, and protrudes in the outer diameter direction at one end. It is comprised by the collar part 8b and the small diameter part 8c which an outer diameter reduces gradually at the other edge part.
The in-core 8 is cut in the circumferential direction, end portions 8d and 8e are provided at a predetermined interval, and a gap 8f is formed. Further, it has elasticity to return to its original state even when the diameter is reduced.
[0021]
In order to join the fluid pipe 2 using the pipe joint 1 of the above embodiment, first, the in-core 8 is inserted until the flange part 8b comes into contact with the end part of the fluid pipe 2 to be joined.
[0022]
Next, T-head bolts 15 are inserted into the flanges 3b and 4b, and the nuts 16 are temporarily tightened. The push ring 4 with the lock ring 5 and the retainer 7 mounted therein is inserted into the expanded diameter portion 3a. Temporarily fasten to the joint body 3.
[0023]
Next, the fluid pipe 2 in which the in-core 8 is mounted is inserted from the end of the pusher wheel 4 temporarily fixed to the joint body 3 until it comes into contact with the stopper 3c, and the temporarily tightened nut 16 is inserted into the flange 3b and the flange 4b. Tighten evenly until the abuts to complete the joining.
[0024]
When the in-core 8 is attached to the end of the fluid pipe 2, the in-core 8 in which the gap 8f is formed can be reduced in diameter by inserting force into the in-core 8, so that the work can be easily performed. Work time can be shortened.
[0025]
Further, since the in-core 8 has elasticity, when the force that has been reduced in diameter is removed, the in-core 8 expands in diameter and comes into close contact with the inner peripheral surface of the fluid pipe 2, so that it does not fall out of the fluid pipe 8 and is stably attached. can do.
[0026]
FIG. 4 shows an in-core 9 according to a second embodiment of the present invention. A joint body 3, a push ring 4, a lock ring 5, a packing 6, a retainer 7 and the like are configured in the same manner as in the first embodiment and used in a pipe joint. The
[0027]
The in-core 9 is formed in a thin cylindrical shape whose outer diameter in a natural state is slightly larger than the inner diameter of the fluid pipe 2, and is cut in the circumferential direction to be provided with end portions 9a and 9b and reduced in diameter. Also has elasticity to return to its original state.
[0028]
The one end portion 9a is provided with three restricting devices 13 formed in a substantially L shape by a locking portion 9c protruding in the center direction and a blocking portion 9d at a predetermined interval, and the other end portion 9b. Is fitted between the end 9 a and the regulating device 13.
[0029]
In order to connect the fluid pipe 2 with the pipe joint 1 using the in-core 9 of the second embodiment, the same method as in the first embodiment is performed.
[0030]
When the in-core 9 is attached to the end of the fluid pipe 2, the diameter can be reduced until the end 9b comes into contact with the locking portion 9c, and can be inserted into the fluid pipe 2. Therefore, the work can be easily performed. Time can be shortened.
[0031]
Further, since the in-core 9 has elasticity, when the force that has been reduced in diameter is removed, the in-core 9 expands and comes into close contact with the inner peripheral surface of the fluid pipe 2, so that it does not fall out of the fluid pipe 2 and is stably attached. can do.
[0032]
When the fluid pipe 2 and the joint body 3 move relative to each other, the diameter of the lock ring 5 is reduced, and a force in the diameter reducing direction is applied to the fluid pipe 2, the in-core 9 is brought into contact with the engaging portion 9a and the end portion 9b abuts. Thus, the diameter of the fluid pipe 2 is prevented from being reduced. Further, the blocking portion 9c prevents the end portion 9b from moving in the center direction of the diameter, thereby preventing the diameter of the fluid pipe 2 from being reduced.
[0033]
FIG. 5 shows an in-core 10 according to a third embodiment of the present invention. A joint body 3, a push ring 4, a lock ring 5, a packing 6, a retainer 7 and the like are configured in the same manner as in the first embodiment and used in a pipe joint. The
[0034]
The in-core 10 is cut in the circumferential direction, end portions 10a and 10b are provided at a predetermined interval, and a gap 10c is formed and has elasticity to return to the original state even when the diameter is reduced.
[0035]
In the gap 10c, the end portions 10a and 10b abut against the locking portion 11 that restricts the diameter reduction, and the end portions 10a and 10b prevent the end portions 10a and 10b from moving in the central direction and the anti-center direction. Thus, the regulating device 14 having a substantially H-shaped cross section is fitted.
[0036]
In order to connect the fluid pipe 2 with the pipe joint 1 using the in-core 10 of the third embodiment, the same method as in the first embodiment is performed.
[0037]
When the in-core 10 is attached to the end of the fluid pipe 2, the diameter can be reduced until the ends 10 a and 10 b come into contact with the locking portion 11, and the diameter can be inserted smaller than the inner diameter of the fluid pipe 2. Therefore, the work can be easily performed and the work time can be shortened.
[0038]
Further, since the in-core 10 has elasticity, when the force that has been reduced in diameter is removed, the in-core 10 expands in diameter and comes into close contact with the inner peripheral surface of the fluid pipe 2 so that it does not fall out of the fluid pipe 2 and the mounting position is maintained. It is easy to decide and can be installed stably.
[0039]
When the fluid pipe 2 and the joint body 3 move relative to each other, the diameter of the lock ring 5 is reduced, and a force in the direction of diameter reduction acts on the fluid pipe 2, the in-core 10 has the end portions 10 a and 10 b on the locking portion 11. The diameter of the fluid pipe 2 is restricted by contact and the diameter of the fluid pipe 2 is prevented. Further, the blocking portion 12 abuts against the end portions 10a and 10b moving in the center direction of the diameter to prevent the diameter of the fluid pipe 2 from being reduced.
[0040]
While the embodiments of the present invention have been described with reference to the drawings, the specific configuration of the present invention is not limited to this.
[0041]
In the embodiment, the pipe joint is provided with a push ring and a lock ring. However, an insertion type pipe joint without a push ring and a lock ring may be used.
[0042]
【The invention's effect】
According to the present invention, since the in-core is provided with a gap in the circumferential direction, it can be inserted with a reduced diameter when it is attached to the fluid pipe. Is shortened.
Further, since the in-core is elastically reduced in diameter, it is restored after being mounted and is brought into pressure contact with the inner peripheral surface of the fluid pipe, so that it is prevented from coming out of the fluid pipe, and the mounting position is held and stably fixed.
[0043]
In addition, when a force in the direction of diameter reduction acts on the fluid pipe, the incore is reduced in diameter to a predetermined diameter, but the diameter reduction is restricted by the regulating device, so that further diameter reduction is prevented and the diameter of the fluid pipe is reduced. Can be prevented. Furthermore, since the blocking device for preventing the overlap between the end portions in the circumferential direction is provided in the in-core regulating device, the overlap between the end portions in the circumferential direction can be prevented by the blocking portion, so that the in-core is surely secured. Can be prevented.
[0044]
According to the second aspect of the present invention, the locking portion is provided at one end portion in the circumferential direction of the in-core, and the other end portion abuts on the locking portion, so that the diameter reduction is regulated and further deformation is reliably prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.
FIG. 2 is a side view of the same.
3A is a front view of the in-core, and FIG. 3B is a side view of the in-core.
FIGS. 4A and 4B are in-cores according to a second embodiment of the present invention, where FIG. 4A is a front view, FIG. 4B is a side view, and FIG.
FIG. 5 shows an in-core according to a third embodiment of the present invention, in which (a) is a front view, (b) is a side view, and (c) is a side view of a regulating device.
FIG. 6 is a sectional view a showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe joint 2 Fluid pipe 3 Joint main body 3a Diameter expansion part 3b Flange 3c Contact part 3d Stopper 4 Push ring 4a Inner taper surface 4b Flange 5 Lock ring 5a Outer taper surface 5b Blade 6 Packing 7 Retainer 8 Incore 8a Main body 8b Eave part 8c Small diameter portion 8d, 8e End portion 8f Gap 9 In-core 9a, 9b End portion 9c Locking portion 9d Blocking portion 10 Incore 10a, 10b End portion 10c Gap 11 Locking portion 12 Blocking portion 13, 14 Restricting device 15 T head bolt 16 Nut

Claims (2)

インコアを端部の内周面に嵌合した流体管と、パッキンを装着した受口部に前記流体管の端部が水密に挿入された継手本体とからなる管継手であって、前記インコアは、薄肉円筒形に形成され、半径方向に弾性縮径可能にする間隔が周方向に設けられ、前記縮径を規制する規制装置が設けられているとともに、前記規制装置には前記インコアの周方向の端部同士の重なりを防止する阻止部が設けられていることを特徴とする管継手。A pipe joint comprising a fluid pipe having an in-core fitted to an inner peripheral surface of an end, and a joint body in which an end of the fluid pipe is inserted in a watertight manner into a receiving part to which a packing is attached, , Formed in a thin cylindrical shape, provided with an interval in the circumferential direction to enable elastic diameter reduction in the radial direction, provided with a regulation device for regulating the diameter reduction, and the regulation device in the circumferential direction of the in-core A pipe joint, characterized in that a blocking portion for preventing the end portions of the pipes from overlapping is provided . 前記インコアの規制装置は、周方向の一端部に、他端部が当接して縮径が規制される係止部が設けられている請求項1に記載の管継手。2. The pipe joint according to claim 1 , wherein the in-core restricting device is provided with a locking portion at which one end of the in-core is in contact with the other end to restrict the diameter reduction.
JP19625099A 1999-07-09 1999-07-09 Pipe fitting Expired - Fee Related JP4200598B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19625099A JP4200598B2 (en) 1999-07-09 1999-07-09 Pipe fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19625099A JP4200598B2 (en) 1999-07-09 1999-07-09 Pipe fitting

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Publication Number Publication Date
JP2001021075A JP2001021075A (en) 2001-01-26
JP4200598B2 true JP4200598B2 (en) 2008-12-24

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Family Applications (1)

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Publication number Priority date Publication date Assignee Title
KR100973180B1 (en) 2010-02-17 2010-07-30 현대주철산업 주식회사 Assembly of press wheel for pipe-connecting

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