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JP4657448B2 - Fitting for flexible pipe - Google Patents
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JP4657448B2 - Fitting for flexible pipe - Google Patents

Fitting for flexible pipe Download PDF

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Publication number
JP4657448B2
JP4657448B2 JP2000397207A JP2000397207A JP4657448B2 JP 4657448 B2 JP4657448 B2 JP 4657448B2 JP 2000397207 A JP2000397207 A JP 2000397207A JP 2000397207 A JP2000397207 A JP 2000397207A JP 4657448 B2 JP4657448 B2 JP 4657448B2
Authority
JP
Japan
Prior art keywords
diameter
downstream
flexible pipe
connection hole
gas
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.)
Expired - Fee Related
Application number
JP2000397207A
Other languages
Japanese (ja)
Other versions
JP2002195477A (en
Inventor
淳 大久保
由香 廣松
美智男 林
俊夫 斎藤
三兄 保坂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koyo Sangyo Co Ltd
Toho Gas Co Ltd
Original Assignee
Koyo Sangyo Co Ltd
Toho Gas Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koyo Sangyo Co Ltd, Toho Gas Co Ltd filed Critical Koyo Sangyo Co Ltd
Priority to JP2000397207A priority Critical patent/JP4657448B2/en
Publication of JP2002195477A publication Critical patent/JP2002195477A/en
Application granted granted Critical
Publication of JP4657448B2 publication Critical patent/JP4657448B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【0001】
【発明の属する技術分野】
この発明は、蛇腹状をなすフレキシブル管を接続するためのフレキシブル管用継手に関する。
【0002】
【従来の技術】
一般に、この種の継手は、フレキシブル管が接続されるガス栓の一部として採用されていることが多い。すなわち、ガス栓(継手)は、ガス通路(接続孔)が形成された栓本体(継手本体)を有しており、ガス通路の内部には、環状のパッキン(係止部)が配置されている。そして、このパッキンにフレキシブル管の先端部を押し付けて、先端から1〜3山分を押し潰すことにより、フレキシブル管をガス通路にパッキンを介して接続するようになっている。
【0003】
【発明が解決しようとする課題】
上記ガス栓においては、フレキシブル管の谷部がパッキンの内周から径方向内側に突出しないようにし、それによってフレキシブル管をパッキンに確実に接続するために、パッキンの内径をフレキシブル管の谷部の内径(フレキシブル管の最小径)より小径にしている。ところが、パッキンの内径をフレキシブル管より小径にすると、パッキンのフレキシブル管より小径の内周部が段差面になり、これがフレキシブル管から接続孔内へのガスのスムースな流れを阻害する。このため、大きな圧力損失が発生するという問題があった。
【0004】
【課題を解決するための手段】
この発明は、上記の問題を解決するために、上流側の開口部からフレキシブル管が挿入される接続孔が形成された継手本体を備え、上記接続孔の内部にはフレキシブル管の先端部を係止する係止部が形成され、上記係止部の内径が上記フレキシブル管の谷部の内径より小径とされたフレキシブル管用継手において、上記接続孔の内部に、上記フレキシブル管の内部と上記接続孔の上記係止部から下流側の部分とを滑らかに連通させる筒体が設けられており、上記筒体が、上記フレキシブル管の内部に挿入される大径部と、上記接続孔の上記係止部から下流側の部分に連通し、上記大径部より小径に形成された小径部と、これら大径部と小径部との間に形成され、上流側から下流側へ向かって小径になるテーパ部とを有していることを特徴としている。
この場合、上記係止部の下流側に続く上記接続孔の内周面に、上記係止部の内径とほぼ同一の嵌合孔部が形成され、この嵌合孔部に上記筒体の下流側の端部が嵌合されており、上記筒体の下流側端部の内径が、上記接続孔の上記嵌合孔部に対して下流側に続く部分の内径とほぼ同一に設定されていることが望ましい。
【0005】
【発明の実施の形態】
以下、この発明の実施の形態について図1〜図5を参照して説明する。
図1及び図2は、この発明の一実施の形態を示す。この実施の形態は、この発明に係るフレキシブル管用継手をガス栓1に適用したものであり、ガス栓1は、ガス栓本体(継手本体)2を備えている。このガス栓本体2の内部には、その上流側の端面(図1において右端面)から下流側の端面まで一直線状に貫通するガス通路(接続孔)21が形成されている。
【0006】
ガス通路21の上流側の開口部には、フレキシブル管を接続するための接続機構3が設けられている。この接続機構3は、ガス通路21の上流側の開口部に螺合された押圧部材31と、この押圧部材31の下流側の端部に回動可能に連結された係合部材32とを備えている。押圧部材31及び係合部材32は、いずれも筒状をなしており、フレキシブル管Fが挿通可能になっている。フレキシブル管Fの先端の谷部が後述するパッキン(係止部)4に突き当たると、係合部材32の下流側端部に形成された環状突出部32aがフレキシブル管Fの先端から1〜3番目の谷部に嵌まり込むようになっている。
【0007】
ガス通路21の内部で接続機構3の設置箇所より若干下流側には、環状をなすパッキン4がガス通路21と同芯に形成されている。このパッキン4の内径は、フレキシブル管Fの谷部の径より小径になっている。したがって、フレキシブル管Fを押圧部材31及び係合部材32を介してガス通路21に挿入すると、フレキシブル管Fの先端部が必ずパッキン4に突き当たる。その状態で押圧部材31を下流側へねじ込むと、係合部材32がフレキシブル管Fを下流側へ移動させる。その結果、係合部材32の環状突出部32aとパッキン4とがそれらの間に位置するフレキシブル管Fの山部及び谷部を押し潰す。これによって、フレキシブル管Fがガス通路21にパッキン4を介して気密に接続される。
【0008】
ガス栓本体2の長手方向の中央部には、ガス通路21を横断する弁収容孔22が形成されている。この弁収容孔22が形成されることにより、ガス通路21が上流側部分21aと下流側部分21bとに二分されている。弁収容孔22には、弁体5が回動可能に収容されている。この弁体5には、その外周面の一側部から他側部まで貫通する貫通孔51が形成されている。弁体5をハンドル6により図1及び図2に示す開位置に回動させると、ガス通路21の上流側部分21aと下流側部分21bとが貫通孔51を介して連通し、ガス栓1が開状態になる。弁体5を開位置からほぼ90°回動させると、上流側部分21aと下流側部分21bとが弁体5によって遮断され、ガス栓1が閉状態になる。
【0009】
ガス栓本体2の下流側端部の外周には、接続ナット7の上流側端部が回動可能に、かつ気密に嵌合されている。この接続ナット7の下流側端部の内周面には、テーパ雌ねじ部71が形成されている。このテーパ雌ねじ部71には、鉄管等の剛性を有するガス管(図示せず)が螺合固定される。この結果、ガス管が接続ナット7を介してガス通路21(の下流側部分21b)に接続される。下流側部分21bにもフレキシブル管を接続するようにしてもよい。
【0010】
上記ガス通路21の上流側部分21aの内部には、筒体8がガス通路21と同芯に配置されている。筒体8は、断面円形の筒状をなすものであり、上流側の大径部81、下流側の小径部82及び中間のテーパ部83を有している。大径部81の外径は、フレキシブル管Fの谷部の内径と同等か若干小径になっている。これにより、大径部81をフレキシブル管Fに挿通することができる範囲において、大径部81の内径をできる限り大きくすることができるようにしている。小径部82は、その外径がパッキン4の内径とほぼ同一であり、パッキン4の下流側に続く上流側部分21aの内周面に形成された嵌合孔部23に嵌合固定されている。小径部82の内径は、嵌合孔部23の下流側に続く上流側部分21aの内径とほぼ同一になっている。これにより、筒体8内のガスが上流側部分21a(上流側部分21aのうちの嵌合孔部23に対して下流側に続く部分)へ流出するときに生じる圧力損失をできる限り小さくしている。テーパ部83は、大径部81と小径部82とを段差なく、スムースに連続させるためのものであり、大径部81から小径部82に向かって漸次小径になっている。
【0011】
上記構成のガス栓1においては、パッキン4の内径がフレキシブル管Fの谷部の内径より小径になっており、それらの間に段差が形成されているが、フレキシブル管F内を流れるガスは、筒体8を通ってガス通路21の上流側部分21a(パッキン4より下流側の上流側部分21a)に流入する。ここで、筒体8は、その内部に段差が形成されることなく、大径部81と小径部82とがテーパ部83によって滑らかに接続されている。したがって、フレキシブル管Fからガス通路内へガスが流入する際に、大きな圧力損失が生じるのを確実に防止することができる。
【0012】
次に、この発明の他の実施の形態を説明する。なお、以下の実施の形態については、上記の実施の形態と異なる構成についてのみ説明することとし、上記実施の形態と同様な部分には同一符号を付してその説明を省略する。
【0013】
図3は、この発明の第2の実施の形態を示す。この実施の形態のガス栓(フレキシブル管用継手)1Aにおいては、上流側部分21aの嵌合孔部23に対して下流側に続く部分にテーパ部24が形成されている。このテーパ部24は、上流側から下流側へ向かうにしたがって小径になっており、上流側の最大径は、筒体8の内径とほぼ同一になっている。一方、下流側の最小径は、テーパ部24より下流側の上流側部分21a、貫通孔51及び下流側部分21bの内径とほぼ同一になっている。
【0014】
図4は、この発明の第3の実施の形態を示している。この実施の形態のガス栓(フレキシブル管用継手)1Bにおいては、ガス通路21がほぼ直角に屈曲しており、その上流側端部21aがガス栓本体2の下端面に開口している。一方、ガス通路21の下流側端部21bは、ガス栓本体2の一側部に形成された突出部25の先端面に開口している。突出部25に接続ナット7が設けられている。その他の構成は、図1及び図2に示すものと同様である。
【0015】
図5は、この発明の第4の実施の形態を示す。この実施の形態のガス栓(フレキシブル管用継手)1Cにおいては、筒体8が図1及び図2に示すものと同様に構成され、その他は図4に示すものと同様に構成されている。
【0016】
なお、この発明は、上記の実施の形態に限定されるものでなく、適宜変更可能である。
例えば、上記の実施の形態においては、筒体8を大径部81、小径部82及びテーパ部83とから構成しているが、テーパ部83だけで構成してもよい。その場合、筒体8を構成するテーパ部83の下流側の最小径は、パッキン4の内径とほぼ同一にし、上流側の最大径はフレキシブル管Fの谷部の内径と同等か若干小径にする。そして、テーパ部83の小径側の端部(下流側の端部)パッキン4に固定してもよい。
また、フレキシブル管Fをガス栓本体2に接続するための接続機構として、上記接続機構3と異なるものを用いてもよい。例えば、上記の実施の形態では、フレキシブル管Fの先端部を押し潰すようにしているが、パッキン4に単に押圧するだけのものであってもよい。
【0017】
【発明の効果】
以上説明したように、この発明によれば、フレキシブル管から接続孔内にガスが流入する際に生じる圧力損失を小さく抑えることができるという効果が得られる。
【図面の簡単な説明】
【図1】この発明の第1の実施の形態を、フレキシブル管を接続する前の状態で示す断面図である。
【図2】同実施の形態を、フレキシブル管を接続した状態で示す断面図である。
【図3】この発明の第2の実施の形態を示す図2と同様の断面図である。
【図4】この発明の第3の実施の形態を示す図2と同様の断面図である。
【図5】この発明の第4の実施の形態を示す図2と同様の断面図である。
【符号の説明】
F フレキシブル管
1 ガス栓(フレキシブル管用継手)
1A ガス栓(フレキシブル管用継手)
1B ガス栓(フレキシブル管用継手)
1C ガス栓(フレキシブル管用継手)
2 ガス栓本体(継手本体)
4 パッキン(係止部)
8 筒体
21 ガス通路(接続孔)
23 嵌合孔部
81 大径部
82 小径部
83 テーパ部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint for flexible pipes for connecting a flexible pipe having a bellows shape.
[0002]
[Prior art]
In general, this type of joint is often employed as a part of a gas stopper to which a flexible pipe is connected. That is, the gas plug (joint) has a plug body (joint body) in which a gas passage (connection hole) is formed, and an annular packing (locking portion) is disposed inside the gas passage. Yes. And the flexible tube is connected to the gas passage through the packing by pressing the tip of the flexible tube against the packing and crushing 1 to 3 peaks from the tip.
[0003]
[Problems to be solved by the invention]
In the above gas stopper, in order to prevent the valley of the flexible tube from protruding radially inward from the inner periphery of the packing, and thereby to securely connect the flexible tube to the packing, the inner diameter of the packing is set to the valley of the flexible tube. The diameter is smaller than the inner diameter (minimum diameter of the flexible tube). However, when the inner diameter of the packing is made smaller than that of the flexible tube, the inner peripheral portion having a smaller diameter than the flexible tube of the packing becomes a stepped surface, which inhibits the smooth flow of gas from the flexible tube into the connection hole. For this reason, there existed a problem that a big pressure loss generate | occur | produced.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes a joint body in which a connection hole into which a flexible pipe is inserted is formed from an opening on the upstream side, and a distal end portion of the flexible pipe is engaged in the connection hole. In the flexible pipe joint in which a locking part to be stopped is formed, and the inner diameter of the locking part is smaller than the inner diameter of the valley part of the flexible pipe, the inside of the flexible pipe and the connection hole are formed inside the connection hole. A cylindrical body is provided for smoothly communicating with the downstream portion from the locking portion , and the cylindrical body is inserted into the flexible tube and the locking of the connection hole. A small-diameter portion communicating with the downstream portion from the large-diameter portion and having a smaller diameter than the large-diameter portion, and a taper formed between the large-diameter portion and the small-diameter portion and having a smaller diameter from the upstream side toward the downstream side. characterized by and a part There.
In this case, the inner peripheral surface of the subsequent downstream side of the upper Kigakaritome section the connection hole, substantially the same fitting hole portion and the inner diameter of the locking portion is formed, of the cylinder to the fitting hole and is fitted the downstream end, the inner diameter of the downstream end of the tubular body, is set to be substantially the same as the inner diameter of the portion following on the downstream side with respect to the fitting hole of the connecting hole It is desirable that
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
1 and 2 show an embodiment of the present invention. In this embodiment, the flexible pipe joint according to the present invention is applied to a gas plug 1, and the gas plug 1 includes a gas plug main body (joint main body) 2. A gas passage (connection hole) 21 penetrating in a straight line from the upstream end face (right end face in FIG. 1) to the downstream end face is formed in the gas plug body 2.
[0006]
A connection mechanism 3 for connecting the flexible pipe is provided in the opening on the upstream side of the gas passage 21. The connection mechanism 3 includes a pressing member 31 that is screwed into an opening on the upstream side of the gas passage 21, and an engaging member 32 that is rotatably connected to an end on the downstream side of the pressing member 31. ing. The pressing member 31 and the engaging member 32 are both cylindrical, and the flexible tube F can be inserted therethrough. When the trough at the tip of the flexible tube F hits a packing (locking portion) 4 described later, the annular protrusion 32a formed at the downstream end of the engagement member 32 is first to third from the tip of the flexible tube F. It is designed to fit in the valley.
[0007]
Inside the gas passage 21, an annular packing 4 is formed concentrically with the gas passage 21 slightly downstream from the installation location of the connection mechanism 3. The inner diameter of the packing 4 is smaller than the diameter of the valley portion of the flexible tube F. Therefore, when the flexible tube F is inserted into the gas passage 21 via the pressing member 31 and the engaging member 32, the distal end portion of the flexible tube F always abuts against the packing 4. In this state, when the pressing member 31 is screwed downstream, the engaging member 32 moves the flexible tube F downstream. As a result, the annular protrusion 32a of the engaging member 32 and the packing 4 crush the crests and troughs of the flexible tube F positioned between them. As a result, the flexible tube F is hermetically connected to the gas passage 21 via the packing 4.
[0008]
A valve housing hole 22 that crosses the gas passage 21 is formed in the center of the gas stopper body 2 in the longitudinal direction. By forming this valve accommodating hole 22, the gas passage 21 is divided into an upstream portion 21a and a downstream portion 21b. The valve body 5 is rotatably accommodated in the valve accommodation hole 22. The valve body 5 is formed with a through hole 51 penetrating from one side of the outer peripheral surface to the other side. When the valve body 5 is rotated to the open position shown in FIGS. 1 and 2 by the handle 6, the upstream portion 21a and the downstream portion 21b of the gas passage 21 communicate with each other through the through hole 51, and the gas plug 1 is Opened. When the valve body 5 is rotated by approximately 90 ° from the open position, the upstream portion 21a and the downstream portion 21b are blocked by the valve body 5 and the gas plug 1 is closed.
[0009]
On the outer periphery of the downstream end portion of the gas plug main body 2, the upstream end portion of the connection nut 7 is rotatably and airtightly fitted. A tapered female thread portion 71 is formed on the inner peripheral surface of the downstream end portion of the connection nut 7. A gas pipe (not shown) having rigidity such as an iron pipe is screwed and fixed to the taper female thread portion 71. As a result, the gas pipe is connected to the gas passage 21 (downstream portion 21b) via the connection nut 7. You may make it connect a flexible pipe also to the downstream part 21b.
[0010]
The cylinder 8 is disposed concentrically with the gas passage 21 in the upstream portion 21 a of the gas passage 21. The cylindrical body 8 has a cylindrical shape with a circular cross section, and has an upstream large diameter portion 81, a downstream small diameter portion 82, and an intermediate tapered portion 83. The outer diameter of the large diameter portion 81 is equal to or slightly smaller than the inner diameter of the valley portion of the flexible tube F. Thereby, in the range which can penetrate the large diameter part 81 in the flexible pipe F, it is trying to enlarge the internal diameter of the large diameter part 81 as much as possible. The outer diameter of the small-diameter portion 82 is substantially the same as the inner diameter of the packing 4, and is fitted and fixed in the fitting hole portion 23 formed on the inner peripheral surface of the upstream portion 21 a that continues downstream of the packing 4. . The inner diameter of the small-diameter portion 82 is substantially the same as the inner diameter of the upstream portion 21 a that follows the downstream side of the fitting hole portion 23. Thereby, the pressure loss which arises when the gas in the cylinder 8 flows out into the upstream part 21a (the part which continues downstream with respect to the fitting hole 23 in the upstream part 21a) is made as small as possible. Yes. The tapered portion 83 is for smoothly and continuously connecting the large diameter portion 81 and the small diameter portion 82 without a step, and gradually decreases in diameter from the large diameter portion 81 toward the small diameter portion 82.
[0011]
In the gas plug 1 having the above-described configuration, the inner diameter of the packing 4 is smaller than the inner diameter of the valley portion of the flexible tube F, and a step is formed between them, but the gas flowing in the flexible tube F is The gas flows through the cylinder 8 and flows into the upstream portion 21a of the gas passage 21 (the upstream portion 21a downstream from the packing 4). Here, the cylindrical body 8 has the large-diameter portion 81 and the small-diameter portion 82 smoothly connected by the tapered portion 83 without forming a step in the inside thereof. Therefore, it is possible to reliably prevent a large pressure loss from occurring when the gas flows from the flexible pipe F into the gas passage.
[0012]
Next, another embodiment of the present invention will be described. In the following embodiment, only the configuration different from the above embodiment will be described, and the same parts as those in the above embodiment will be denoted by the same reference numerals and the description thereof will be omitted.
[0013]
FIG. 3 shows a second embodiment of the present invention. In the gas plug (flexible pipe joint) 1A of this embodiment, a taper portion 24 is formed in a portion continuing downstream from the fitting hole portion 23 of the upstream portion 21a. The taper portion 24 becomes smaller in diameter from the upstream side to the downstream side, and the maximum diameter on the upstream side is substantially the same as the inner diameter of the cylindrical body 8. On the other hand, the minimum diameter on the downstream side is substantially the same as the inner diameters of the upstream portion 21a, the through hole 51, and the downstream portion 21b on the downstream side of the taper portion 24.
[0014]
FIG. 4 shows a third embodiment of the present invention. In the gas plug (flexible pipe joint) 1 </ b> B of this embodiment, the gas passage 21 is bent substantially at a right angle, and its upstream end 21 a opens to the lower end surface of the gas plug main body 2. On the other hand, the downstream end portion 21 b of the gas passage 21 is open to the distal end surface of the protruding portion 25 formed on one side portion of the gas plug main body 2. A connecting nut 7 is provided on the protruding portion 25. Other configurations are the same as those shown in FIGS.
[0015]
FIG. 5 shows a fourth embodiment of the present invention. In the gas plug (flexible pipe joint) 1C of this embodiment, the cylindrical body 8 is configured in the same manner as that shown in FIGS. 1 and 2, and the others are configured in the same manner as that shown in FIG.
[0016]
In addition, this invention is not limited to said embodiment, It can change suitably.
For example, in the above-described embodiment, the cylindrical body 8 is configured by the large diameter portion 81, the small diameter portion 82, and the tapered portion 83, but may be configured by only the tapered portion 83. In that case, the minimum diameter on the downstream side of the tapered portion 83 constituting the cylindrical body 8 is substantially the same as the inner diameter of the packing 4, and the maximum diameter on the upstream side is equal to or slightly smaller than the inner diameter of the valley portion of the flexible tube F. . Then, the taper portion 83 may be fixed to the end portion on the small diameter side (end portion on the downstream side) packing 4.
Further, a connection mechanism for connecting the flexible tube F to the gas plug body 2 may be different from the connection mechanism 3 described above. For example, in the above embodiment, the distal end portion of the flexible tube F is crushed, but it may be simply pressed against the packing 4.
[0017]
【The invention's effect】
As described above, according to the present invention, it is possible to reduce the pressure loss that occurs when the gas flows from the flexible tube into the connection hole.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of the present invention before a flexible tube is connected.
FIG. 2 is a cross-sectional view showing the same embodiment with a flexible pipe connected thereto.
FIG. 3 is a sectional view similar to FIG. 2, showing a second embodiment of the present invention.
FIG. 4 is a cross-sectional view similar to FIG. 2 showing a third embodiment of the present invention.
FIG. 5 is a cross-sectional view similar to FIG. 2, showing a fourth embodiment of the present invention.
[Explanation of symbols]
F Flexible pipe 1 Gas stopper (Fitting for flexible pipe)
1A Gas stopper (Fitting for flexible pipe)
1B Gas stopper (Fitting for flexible pipe)
1C Gas stopper (Fitting for flexible pipe)
2 Gas stopper body (Fitting body)
4 Packing (locking part)
8 cylinder 21 gas passage (connection hole)
23 Fitting hole portion 81 Large diameter portion 82 Small diameter portion 83 Tapered portion

Claims (2)

上流側の開口部からフレキシブル管が挿入される接続孔が形成された継手本体を備え、上記接続孔の内部にはフレキシブル管の先端部を係止する係止部が形成され、上記係止部の内径が上記フレキシブル管の谷部の内径より小径とされたフレキシブル管用継手において、
上記接続孔の内部に、上記フレキシブル管の内部と上記接続孔の上記係止部から下流側の部分とを滑らかに連通させる筒体が設けられており、
上記筒体が、上記フレキシブル管の内部に挿入される大径部と、上記接続孔の上記係止部から下流側の部分に連通し、上記大径部より小径に形成された小径部と、これら大径部と小径部との間に形成され、上流側から下流側へ向かって小径になるテーパ部とを有していることを特徴とするフレキシブル管用継手。
A joint body having a connection hole into which a flexible pipe is inserted from an opening on the upstream side; and a locking portion for locking a distal end portion of the flexible pipe is formed inside the connection hole. In the flexible pipe joint, the inner diameter of which is smaller than the inner diameter of the valley of the flexible pipe,
Inside the connection hole, a cylindrical body that smoothly communicates the inside of the flexible tube and the downstream portion from the locking portion of the connection hole is provided,
The cylindrical body is inserted into the flexible pipe, a large-diameter portion, a small-diameter portion that communicates with the downstream portion from the locking portion of the connection hole, and has a smaller diameter than the large-diameter portion, A flexible pipe joint having a tapered portion formed between the large-diameter portion and the small-diameter portion and having a small diameter from the upstream side toward the downstream side .
上記係止部の下流側に続く上記接続孔の内周面に、上記係止部の内径とほぼ同一の嵌合孔部が形成され、この嵌合孔部に上記筒体の下流側の端部が嵌合されており、上記筒体の下流側端部の内径が、上記接続孔の上記嵌合孔部に対して下流側に続く部分の内径とほぼ同一に設定されていることを特徴とする請求項1に記載のフレキシブル管用継手。A fitting hole portion substantially the same as the inner diameter of the locking portion is formed on the inner peripheral surface of the connection hole following the downstream side of the locking portion, and the downstream end of the cylindrical body is formed in the fitting hole portion. Part is fitted, and the inner diameter of the downstream end of the cylindrical body is set to be substantially the same as the inner diameter of the part that continues downstream from the fitting hole of the connection hole. The joint for flexible pipes according to claim 1 characterized by things.
JP2000397207A 2000-12-27 2000-12-27 Fitting for flexible pipe Expired - Fee Related JP4657448B2 (en)

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Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5763182U (en) * 1980-09-30 1982-04-15
JP4159156B2 (en) * 1998-12-22 2008-10-01 新和産業株式会社 Fitting for flexible tube

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