JP4087480B2 - Fitting for hose - Google Patents

Fitting for hose Download PDF

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Publication number
JP4087480B2
JP4087480B2 JP27519497A JP27519497A JP4087480B2 JP 4087480 B2 JP4087480 B2 JP 4087480B2 JP 27519497 A JP27519497 A JP 27519497A JP 27519497 A JP27519497 A JP 27519497A JP 4087480 B2 JP4087480 B2 JP 4087480B2
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Japan
Prior art keywords
female body
cap nut
nipple
nut screw
hose
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.)
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JP27519497A
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Japanese (ja)
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JPH1194144A (en
Inventor
尚宣 物部
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Bridgestone Corp
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Bridgestone Corp
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Priority to JP27519497A priority Critical patent/JP4087480B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
    • F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
    • F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
    • F16L27/0812—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/20—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members
    • F16L33/207—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose
    • F16L33/2071—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Pressure Members (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)
  • Joints Allowing Movement (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明はホ−スを他の部材に接続するためのホ−ス用継手に関する。
【０００２】
【従来の技術】
近年、トイレやキッチン、洗面ユニット、風呂場等家庭内の水道配管の一部にフレキシブルホ−スを用いることにより、管材の精密な長さ合わせや、中心合わせ作業を省略し、工事全般の施工性を容易にしようとの試みがなされている。
ところが、フレキシブルホ−スはその柔軟性であるが故に、ホ−ス両端の接続ネジを締め付ける過程で捩じれが加わり易い。このような捩じれはフレキシブルホ−スの性能を損ない兼ねないばかりでなく、ホ−スが予期せぬライン形状を呈し、特に通常目に触れる場所での配管にあっては、美観を確保できないといった問題も発生する。
【０００３】
このフレキシブルホ−スの捩じれを避けるためには、一旦締め込んだネジを再度緩め、予想される捩じれと反対の向きに予めホ−スを捩じっておいて、締め付け作業を行う等の煩雑な調整作業を要している。そして、この問題を排除すべく接続部に自在継手を介在させたり、ホ−ス継手内に自在機構を設けたりする手段が講じられることもある。そのためには予め部材を準備しておかなくてはならないことや、このために費用がかさむ等の問題がある。
【０００４】
【発明が解決しようとする課題】
本発明は、上記事実を考慮して、予め組み込まれた自在機構や別に準備した自在継手を用いることなしに、ホ−ス接続部の自在回転を可能にすることを課題とするものである。
【０００５】
【課題を解決するための手段】
請求項１に記載の発明は、雌体、ニップル、袋ナットネジ、Ｏ−リングより構成され、雌体内部に差し込まれるニップル先端部外周にＯ−リング溝を形成し、これにＯ−リングを嵌め込んで雌体内周面との間の水密性を保持し、雌体とニップルとを袋ナットネジをもって両者を連結するホ−ス用継手であって、前記袋ナットネジ３を雌体１の外周側ネジ１ｃに螺合し、かつ、袋ナットネジ３の後端３ａに備えた突条３ｃを雌体１の端面１ｄに当接させることで袋ナットネジ３の最終締め込みがなされ、最終締め込み状態において前記袋ナットネジ３の後端３ａとニップル２の外周の鍔部２ａとが係合した際に、前記雌体１の端面１ｄと前記袋ナットネジ３の後端３ａとの間に配置されるニップル２の鍔部２ａが、雌体１の端面１ｄと軸線方向で接触することなく間隔ｃを保つ、ことを特徴としている 。
【０００６】
請求項２に記載の発明は、請求項１に記載のホ−ス用継手において、前記隙間ｃが０．０５〜５ｍｍである、ことを特徴としている。
【０００７】
【発明の実施の形態】
本発明のホ−ス用継手は以上の構造を有するものであり、ニップル端部外周面にＯ−リング溝及びこれに嵌め込まれたＯ−リングを有し、雌体内にそのＯ−リング部が所定位置まで差し込まれ、ニップル外周面と雌体との間に水密性を確保する。
【０００８】
そして、ニップルは差し込まれた位置から後戻りすることのないよう、ニップル外周に形成された鍔部が袋ナットネジの係合部によって支持されるものであって、袋ナットネジは雌体の外周に刻設した雄ネジに十分なトルクで締め上げられ、水撃振動等による緩みを未然に防止するようになっている。
【０００９】
そして、袋ナットネジの最終締め込み時の雌体とニップルとの間の軸線方向相対位置が正確に決めるための手段を備えているもので、その手段の具体的形態として、袋ナット内周面に設けた突起又は突条をもって位置決めするもので、かかる構成としたことにより、雌体端面とニップル外周の鍔部の前面との間に、一定の隙間を保持するようにしたもので、この隙間が０．０５〜５ｍｍ、好ましくは、０．２〜２ｍｍの構造としたものである。
【００１０】
更に具体的に言えば、ニップル外周に形成された鍔部は雌体の端面と袋ナット係合面との間隔より幾分小さめの設定されるものであり、袋ナットネジが十分締め付けられた後も両者間に隙間が保持されて周方向に回転できるようにしたものである。
【００１１】
本発明によるホ−ス用継手は以上の構成を有するものであり、袋ナットネジを十分締め付けた後も、ニップル（ホ−ス端部）は雌体に対して自由に回転できるものであって、このためホ−スに捩じれが加わることがなくなったものである。そして、回転を可能とするための特別の部材を必要としないという特徴を合わせ持っている。
【００１２】
【実施例】
以下、実施例を説明する前に、図面をもって比較例に係るホ−ス用継手を詳細に説明する。
図１は比較例を示す半裁断面図である。比較例のホ−ス用継手は、雌体１、ニップル２、袋ナットネジ３、Ｏ−リング４より形成される。即ち、雌体１はホ−スが取り付けられる側であり、外周に突条１ａを備えると共に、内管部１ｂが形成されるものである。そして、ニップル２の外周に鍔部２ａを形成すると共に、これより先端側にＯ−リング溝２ｂを形成し、これにＯ−リング４が嵌め込まれている。ニップル２の後端にはフレキシブルホ−ス６が装着され、スリ−ブ５を加締めることによって固定されている。この図ではフレキシブルホ−ス６は内面に耐水性合成ゴム内管６ａと、その外周にステンレス線６ｂが補強材として編み組みされ、更にその外周に塩ビ外被６ｃが被覆されているものである。
【００１３】
袋ナットネジ３は後端３ａをニップル２の鍔部２ａを内包し、雌体１の外周側雄ネジ１ｃに螺合されて連結されるものである。そして、ニップル２の外周に形成された鍔部２ａは、袋ナットネジ３が最終締め込み状態の際に雌体１の端面１ｄと袋ナットネジ３の係合面３ｂとの間隔より幾分小さめの設定されるものであり、袋ナットネジ３が十分締め付けられた後も両者間に隙間ｃが保持されて周方向に回転できるようにしたものである。
【００１４】
次に、比較例のホ−スの接続方法について説明する。
雌体１の内管部１ｂにニップル２の先端を挿入し、袋ナットネジ３が雌体１の雄ネジ１ｃに掛かるまで押し込む。そして、袋ナット３を回しながら、雌体１の外周突条１ａに袋ナット３の左端面が当接するまで十分締め上げる。このようにしてニップル２と雌体１の間はＯ−リング４によって水密性が保たれる。
【００１５】
さて、この際、雌体１の先端の端面１ｄとニップル２の鍔部２ａの相対する面の間は一定の間隔ｃを有するものであって、このため、配管施工後もニップル２は雌体１に対して周方向に自由に回転できることとなり、フレキシブルホ−ス１に例え捩じれが生じたとしてもこの回転によって直にこれが解消されることとなる。尚、かかる隙間ｃは、小さ過ぎると雌体１とニップル２の鍔部２ａの側面が直接接触してしまうケ−スが多くなり、ニップルの回転が阻害される。一方、隙間ｃが大き過ぎると、ホ−ス端部の軸方向遊びが大きくなってしまう。この隙間ｃの好ましい範囲としては０．１〜５ｍｍ、更に好ましくは、０．２〜２ｍｍである。
【００１６】
次に、本発明に係るホ−ス用継手を説明する。
図２は本発明の例を示す半裁断面図である。本発明のホ−ス用継手は、前例と同様に袋ナットネジ３を十分締め付けるが、袋ナットネジ３には雌体の先端の端面１ｄに対して突条３ｃが形成されており、両者を当接させるまで袋ナットネジ３をねじ込むものであり、このことにより隙間ｃが確保されることになる。この図例では雌体の先端の端面１ｄとニップル２の鍔部２ａとの間に隙間ｃを形成するものである。
【００１７】
【発明の効果】
本発明によるホ−スの継手では、袋ナットを十分締め付けた後もホ−ス端部は雌体に対して自由に回転できるのでホ−スに捩じれが加わらず、そのための機能低下の懸念がなく、ホ−スラインも捩じれがなく安定する。
又、このように捩じれを気にせずに配管作業が行えるので、作業効率が上がると同時に特別の訓練を受けた配管技能者でなくても施工ができる、等の利点がある。加うるに、本発明のホ−ス継手は接続部を自在回転可能とするための特別の部材を必要とせず経済的にも優れている。
【図面の簡単な説明】
【図１】 図１は比較例を示す半裁断面図である。
【図２】 図２は本発明を示す半裁断面図である。
【符号の説明】
ｃ‥‥雌体の先端の端面とニップルの鍔部の間隔、
１‥‥雌体、
１ａ‥‥雌体の外周の突条、
１ｂ‥‥雌体の内管部、
１ｃ‥‥雌体の外周側雄ネジ、
１ｄ‥‥雌体の端面、
２‥‥ニップル、
２ａ‥‥ニップルの外周の鍔部、
２ｂ‥‥Ｏ−リング溝、
３‥‥袋ナットネジ、
３ａ‥‥袋ナットネジの後端、
３ｂ‥‥袋ナットネジの係合面、
３ｃ‥‥袋ナットネジの突条、
４‥‥Ｏ−リング、
５‥‥スリ−ブ、
６‥‥フレキシブルホ−ス、
６ａ‥‥内面の耐水性合成ゴム内管、
６ｂ‥‥ステンレス線、
６ｃ‥‥塩ビ外被。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hose joint for connecting a hose to another member.
[0002]
[Prior art]
In recent years, the use of flexible hoses for some of the water pipes in the home such as toilets, kitchens, wash-basins, bathrooms, etc. eliminates the need for precise length adjustment and centering work of pipe materials, and overall construction work. Attempts have been made to facilitate sex.
However, since the flexible hose is flexible, twisting is likely to occur during the process of tightening the connecting screws at both ends of the hose. Such a twist not only impairs the performance of the flexible hose, but also the hose has an unexpected line shape, and it is difficult to ensure aesthetics, especially in piping where it is normally touched. Problems also arise.
[0003]
In order to avoid the twisting of the flexible hose, the screw once tightened is loosened again, and the hose is twisted in advance in the opposite direction to the expected twisting, and the tightening work is performed. Adjustment work is required. In order to eliminate this problem, a means for interposing a universal joint in the connection portion or providing a universal mechanism in the hose joint may be provided. For this purpose, there is a problem that the member must be prepared in advance and the cost is increased for this purpose.
[0004]
[Problems to be solved by the invention]
In view of the above facts, the present invention has an object of enabling free rotation of the hose connecting portion without using a preinstalled universal mechanism or a separately prepared universal joint.
[0005]
[Means for Solving the Problems]
The invention described in claim 1 is composed of a female body, a nipple, a cap nut screw, and an O-ring. An O-ring groove is formed on the outer periphery of the tip of the nipple inserted into the female body, and the O-ring is fitted into this. A hose joint for connecting the female body and the nipple to each other with a cap nut screw, wherein the cap nut screw 3 is connected to the outer peripheral side screw of the female body 1. The cap nut screw 3 is finally tightened by screwing it into 1c and bringing the ridge 3c provided at the rear end 3a of the cap nut screw 3 into contact with the end surface 1d of the female body 1 in the final tightened state. When the rear end 3a of the cap nut screw 3 is engaged with the flange 2a on the outer periphery of the nipple 2, the nipple 2 disposed between the end surface 1d of the female body 1 and the rear end 3a of the cap nut screw 3 is The flange 2a is in the axial direction with the end surface 1d of the female body 1. Keep a proper distance c without contact, it is characterized in that.
[0006]
According to a second aspect of the present invention, in the hose joint according to the first aspect, the gap c is 0.05 to 5 mm.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The hose joint of the present invention has the above-described structure, and has an O-ring groove and an O-ring fitted in the outer peripheral surface of the nipple end, and the O-ring portion is provided in the female body. It is inserted to a predetermined position to ensure water tightness between the nipple outer peripheral surface and the female body.
[0008]
Then, the flange formed on the outer periphery of the nipple is supported by the engaging portion of the cap nut screw so that the nipple does not return from the inserted position, and the cap nut screw is engraved on the outer periphery of the female body. The male screw is tightened with sufficient torque to prevent loosening due to water hammer vibration or the like.
[0009]
And it is provided with means for accurately determining the axial relative position between the female body and the nipple at the time of final tightening of the cap nut screw, and as a specific form of the means, on the inner peripheral surface of the cap nut Positioning is performed with the provided protrusions or ridges, and by adopting such a configuration, a certain gap is maintained between the female body end surface and the front surface of the flange on the outer periphery of the nipple. The structure is 0.05 to 5 mm, preferably 0.2 to 2 mm.
[0010]
More specifically, the flange formed on the outer periphery of the nipple is set slightly smaller than the distance between the end face of the female body and the cap nut engaging surface, and even after the cap nut screw is sufficiently tightened. A gap is held between them so that they can rotate in the circumferential direction.
[0011]
The hose joint according to the present invention has the above-described configuration. Even after the cap nut screw is sufficiently tightened, the nipple (the end of the hose) can freely rotate with respect to the female body, For this reason, no twist is added to the hose. And it has the characteristic that the special member for enabling rotation is not required.
[0012]
【Example】
Before describing the embodiments, the hose joint according to the comparative example will be described in detail with reference to the drawings .
FIG. 1 is a half sectional view showing a comparative example. The hose joint of the comparative example is formed of a female body 1, a nipple 2, a cap nut screw 3, and an O-ring 4. That is, the female body 1 is a side to which a hose is attached, and includes a protrusion 1a on the outer periphery and an inner tube portion 1b. A flange 2a is formed on the outer periphery of the nipple 2, and an O-ring groove 2b is formed on the tip side from the flange 2a. A flexible hose 6 is attached to the rear end of the nipple 2 and is fixed by caulking the sleeve 5. In this figure, the flexible hose 6 has a water-resistant synthetic rubber inner tube 6a on its inner surface, a stainless wire 6b braided on its outer periphery as a reinforcing material, and a vinyl chloride jacket 6c on its outer periphery. .
[0013]
The cap nut screw 3 includes a rear end 3a of the flange 2a of the nipple 2 and is screwed to and connected to the outer peripheral side male screw 1c of the female body 1. The flange 2a formed on the outer periphery of the nipple 2 is set slightly smaller than the distance between the end surface 1d of the female body 1 and the engagement surface 3b of the cap nut screw 3 when the cap nut screw 3 is in the final tightened state. Even after the cap nut screw 3 is sufficiently tightened, the gap c is held between the two so that it can rotate in the circumferential direction.
[0014]
Next, the hose connection method of the comparative example will be described.
The tip of the nipple 2 is inserted into the inner tube portion 1 b of the female body 1 and is pushed in until the cap nut screw 3 is engaged with the male screw 1 c of the female body 1. Then, while turning the cap nut 3, the cap nut 3 is sufficiently tightened until the left end surface of the cap nut 3 comes into contact with the outer peripheral protrusion 1 a of the female body 1. In this way, watertightness is maintained between the nipple 2 and the female body 1 by the O-ring 4.
[0015]
At this time, the end face 1d of the front end of the female body 1 and the opposite surface of the flange 2a of the nipple 2 have a constant distance c. Thus, even if the flexible hose 1 is twisted, this rotation directly eliminates this. If the gap c is too small, the case where the female body 1 and the side surface of the flange 2a of the nipple 2 are in direct contact with each other increases, and the rotation of the nipple is hindered. On the other hand, if the gap c is too large, the axial play at the hose end is increased. A preferable range of the gap c is 0.1 to 5 mm, and more preferably 0.2 to 2 mm.
[0016]
Next, the hose joint according to the present invention will be described.
FIG. 2 is a half sectional view showing an example of the present invention . The hose joint of the present invention sufficiently tightens the cap nut screw 3 as in the previous example, but the cap nut screw 3 has a protrusion 3c formed on the end face 1d of the tip of the female body, and abuts both. The cap nut screw 3 is screwed in until the gap is capped, thereby ensuring the clearance c. In this example, a gap c is formed between the end face 1d of the tip of the female body and the flange 2a of the nipple 2.
[0017]
【The invention's effect】
In the hose joint according to the present invention, the hose end portion can rotate freely with respect to the female body even after the cap nut is sufficiently tightened, so that the hose is not twisted, and there is a concern that the function may be lowered. The hose line is also stable without twisting.
In addition, since the piping work can be performed without worrying about twisting as described above, there is an advantage that the work efficiency can be improved and the construction can be performed even by a piping engineer who has received special training. In addition, the hose joint of the present invention does not require a special member for allowing the connecting portion to freely rotate and is economically superior.
[Brief description of the drawings]
FIG. 1 is a half cut sectional view showing a comparative example .
FIG. 2 is a half sectional view showing the present invention .
[Explanation of symbols]
c: The distance between the end face of the tip of the female body and the heel of the nipple,
1 ... Female body,
1a ... a protrusion on the outer periphery of the female body,
1b ... the inner tube of the female body,
1c ... male screw on the outer peripheral side of the female body,
1d ... end face of female body,
2 Nipple,
2a ... ridge on the outer periphery of the nipple,
2b ... O-ring groove,
3 ... Cap nut screw,
3a ... The rear end of the cap nut screw,
3b ... Cap nut screw engagement surface,
3c ... Cap nut screw thread,
4 ... O-ring,
5 ... Sleeve,
6 ... Flexible hose,
6a ... Water-resistant synthetic rubber inner tube on the inner surface,
6b Stainless steel wire,
6c ... PVC jacket.

Claims (2)

雌体、ニップル、袋ナットネジ、Ｏ−リングより構成され、雌体内部に差し込まれるニップル先端部外周にＯ−リング溝を形成し、これにＯ−リングを嵌め込んで雌体内周面との間の水密性を保持し、雌体とニップルとを袋ナットネジをもって両者を連結するホ−ス用継手であって、It is composed of a female body, nipple, cap nut screw, and O-ring. An O-ring groove is formed on the outer periphery of the nipple tip inserted into the female body. A hose joint that connects the female body and the nipple with a cap nut screw.
前記袋ナットネジ３を雌体１の外周側ネジ１ｃに螺合し、かつ、袋ナットネジ３の後端３ａに備えた突条３ｃを雌体１の端面１ｄに当接させることで袋ナットネジ３の最終締め込みがなされ、最終締め込み状態において前記袋ナットネジ３の後端３ａとニップル２の外周の鍔部２ａとが係合した際に、前記雌体１の端面１ｄと前記袋ナットネジ３の後端３ａとの間に配置されるニップル２の鍔部２ａが、雌体１の端面１ｄと軸線方向で接触することなく間隔ｃを保つ、ことを特徴とするホ−ス用継手。The cap nut screw 3 is screwed into the outer peripheral side screw 1c of the female body 1 and the protrusion 3c provided on the rear end 3a of the cap nut screw 3 is brought into contact with the end surface 1d of the female body 1 to When the final tightening is performed and the rear end 3a of the cap nut screw 3 is engaged with the flange 2a on the outer periphery of the nipple 2 in the final tightened state, the end surface 1d of the female body 1 and the rear end of the cap nut screw 3 are engaged. A joint for hose characterized in that the flange portion 2a of the nipple 2 disposed between the end 3a maintains a distance c without contacting the end surface 1d of the female body 1 in the axial direction. 前記隙間ｃが０．０５〜５ｍｍである、ことを特徴とする請求項１に記載のホ−ス用継手。The hose joint according to claim 1, wherein the gap c is 0.05 to 5 mm.
JP27519497A 1997-09-22 1997-09-22 Fitting for hose Expired - Lifetime JP4087480B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27519497A JP4087480B2 (en) 1997-09-22 1997-09-22 Fitting for hose

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27519497A JP4087480B2 (en) 1997-09-22 1997-09-22 Fitting for hose

Publications (2)

Publication Number Publication Date
JPH1194144A JPH1194144A (en) 1999-04-09
JP4087480B2 true JP4087480B2 (en) 2008-05-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP27519497A Expired - Lifetime JP4087480B2 (en) 1997-09-22 1997-09-22 Fitting for hose

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPQ210299A0 (en) * 1999-08-09 1999-09-02 Ewing, Warren A. Swivel joint
KR100389615B1 (en) * 2001-04-14 2003-07-04 주식회사코푸렉스 Coupling structure of hose
JP2003028373A (en) * 2001-07-17 2003-01-29 Hajime Inoue Pipe insert joint
JP2013224677A (en) * 2012-04-19 2013-10-31 Nippon Soken Inc Pipe joint
JP2014095468A (en) * 2012-10-12 2014-05-22 Denso Corp Pipe joint
WO2016170819A1 (en) * 2015-04-21 2016-10-27 千住スプリンクラー株式会社 Connecting structure for fire-extinguishing equipment piping, and sprinkler head
WO2017134736A1 (en) * 2016-02-02 2017-08-10 千住スプリンクラー株式会社 Fire extinguishing system pipe connection structure and connection method therefor
WO2022187992A1 (en) * 2021-03-08 2022-09-15 菲时特集团股份有限公司 Movable connection pipe assembly

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