JP4376114B2 - Ferrule fitting - Google Patents

Ferrule fitting Download PDF

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JP4376114B2
JP4376114B2 JP2004131149A JP2004131149A JP4376114B2 JP 4376114 B2 JP4376114 B2 JP 4376114B2 JP 2004131149 A JP2004131149 A JP 2004131149A JP 2004131149 A JP2004131149 A JP 2004131149A JP 4376114 B2 JP4376114 B2 JP 4376114B2
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ferrule
joint
wall
inner peripheral
peripheral wall
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JP2005315285A (en
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橋本  学
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QP Corp
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QP Corp
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Description

本発明は、ヘルール継手に関し、詳しくは配管同士やポンプの出入り口と配管、ストレーナーや充填ノズル等種々の物品を他の物品と接続する際に、その接続部に漏れ止め用のガスケット(パッキン)を使用することなく、接続部からの漏出を防止して接続できるヘルール継手に関する。 The present invention relates to a ferrule joint, and in detail, when connecting various articles such as pipes, pump entrance and exit, pipes, strainers and filling nozzles to other articles, a leak-proof gasket (packing) is provided at the connection part. The present invention relates to a ferrule joint that can be connected without being leaked from a connecting portion without being used.

従来、配管の接続方法としては、ねじ込み継手、フランジ継手及び溶接継手などが用いられている。  Conventionally, threaded joints, flange joints, weld joints, and the like have been used as pipe connection methods.

この時、用いられる配管の継手には、一般的にはそのシール性維持のため樹脂系の材料のパッキンが使用されている。それ故、ガスケット(パッキン)材に微細な孔や溝等が生じやすくその部分にごみや製品が入り込みやすく、点検や交換等に手間や時間を要するものである。また、このように配管の継手部にパッキンを挟み込んで漏れを防ぐ方法は、パッキンに費用がかかると共にそのその締め付け作業によってはパッキンの破損や、パッキンの破片が製品中へ混入する等の事故原因ともなっている。このことを解決するため、近年パッキンを用いない(パッキンレス)の配管継手が種々提案されている。
例えば、特許文献1には、衝接板(密接片)を締め付けによって押圧し、この締付力に対する反力を利用したシールで漏れを防止する構造の配管継手が記載されている。また、特許文献2には、接合面を円錐とし、これをボルトとナットによって締付シールする配管継手が記載されている。しかしながら、上記特許文献1に記載の配管継手は、配管内圧力が増加した場合、或いは衝接板の表面等に細かい傷等が発生した場合には完全に漏れを防止することは困難である。また、特許文献2の配管継手は配管内圧力増加には耐え得るものの、その取り外し、洗浄、組立て等には労力と時間を要するという欠点がある。
At this time, a packing made of a resin material is generally used for the piping joint used to maintain the sealing performance. For this reason, fine holes and grooves are easily formed in the gasket material, and dust and products are likely to enter the portion, which requires labor and time for inspection and replacement. In addition, the method of preventing the leakage by inserting the packing into the joint part of the pipe in this way is costly and causes an accident such as damage to the packing or contamination of the packing into the product depending on the tightening work. It is also. In order to solve this problem, various pipe joints that do not use packing (packing-less) have been proposed in recent years.
For example, Patent Document 1 describes a pipe joint having a structure in which a contact plate (contact piece) is pressed by tightening and leakage is prevented by a seal using a reaction force against the tightening force. Further, Patent Document 2 describes a pipe joint in which a joint surface is a cone and this is tightened and sealed with a bolt and a nut. However, it is difficult for the pipe joint described in Patent Document 1 to completely prevent leakage when the pressure in the pipe increases or when a fine scratch or the like occurs on the surface of the contact plate. Moreover, although the piping joint of patent document 2 can endure the pressure increase in piping, there exists a fault that the removal, washing | cleaning, assembly, etc. require an effort and time.

従って、近年に至るまで、パッキンレス構造であっても、例えばワンタッチで取り外し洗浄が可能で組立ても容易な配管継手(以下、「へルール継手」ともいう)にも適するような配管継手は提案されていない。
特許第3149390号 特開平8−21575
Therefore, until recently, there has been proposed a pipe joint suitable for a pipe joint (hereinafter also referred to as a “ferrule joint”) that has a packingless structure, for example, can be removed and washed with one touch and can be easily assembled. Not.
Japanese Patent No. 3149390 JP-A-8-21575

本発明は、以上の問題点を勘案してなされたもので、組立が容易であり、パッキンを使用することなしに配管内からの漏れを防止し得るヘルール継手を提供することを目的とする。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a ferrule joint that is easy to assemble and can prevent leakage from inside the pipe without using packing.

上記の目的を解決するための本発明ヘルール継手は、「(1)一対のヘルール継手部の相対する平坦な衝接面の一側面に同心円状の凹溝を形成してあり、他側の衝接面には前記凹溝に嵌合可能な環状凸部を成形してあるヘルール継手において、前記一側の凹溝の内周壁を凹溝底部からの一定肉厚部分として形成するか、又は該一定肉厚部から内周壁端部へ漸次肉薄となるように内周壁の内側面を傾斜面として形成すると共に、前記環状凸部の内側壁をその凸部の端部へ肉薄となるように傾斜面として形成してあり、この一対の継手部を嵌合し、ヘルールクランプにより固定操作することにより前記凹溝の内周壁端部の周縁全周を前記環状凸部の内側壁に周縁部に沿って線接触し、さらに圧接できるようにしてあることを特徴とする。(2)前記環状凸部の内側壁は前記凹溝の内周壁との圧接位置又はその近傍から、さらに緩やかな傾斜となるような2段傾斜面として形成してある。(3)前記継手部の相対する平坦な衝接面はへルールクランプにより締結され、該へルールクランプの締付応力により、前記凹溝の内周壁端部が前記凸部の内側壁で押し広げられ配管内方へ撓み可能に凹溝底部と凸部の先端の間には所定の隙間を形成してある。」ものである。 The ferrule joint of the present invention for solving the above-mentioned object is as follows: “(1) Concentric concave grooves are formed on one side of the opposed flat contact surfaces of a pair of ferrule joint portions, and the other side In the ferrule joint in which an annular convex portion that can be fitted into the concave groove is formed on the contact surface, the inner peripheral wall of the concave groove on one side is formed as a constant thick portion from the bottom of the concave groove, or The inner surface of the inner peripheral wall is formed as an inclined surface so that it gradually becomes thinner from the constant thickness portion to the end of the inner peripheral wall, and the inner wall of the annular convex portion is inclined so as to become thinner toward the end of the convex portion. It is formed as a surface, and by fitting this pair of joints and fixing with a ferrule clamp , the entire peripheral edge of the inner peripheral wall end of the groove is aligned with the inner wall of the annular convex part along the peripheral part. contact line Te, characterized in that are also available more pressure. (2) before The inner side wall of the annular convex part is formed as a two-step inclined surface that is more gently inclined from the pressure contact position with the inner peripheral wall of the concave groove or the vicinity thereof. (3) The opposing flat surfaces of the joint part The contact surface is fastened by a ferrule clamp, and the inner peripheral wall end of the concave groove is expanded by the inner wall of the convex portion due to the tightening stress of the ferrule clamp, so that the concave groove can be bent inward of the pipe. A predetermined gap is formed between the bottom part and the tip of the convex part. "

本発明は、上記(1)の構造としてあるので、凹溝に環状凸部を嵌合させ締付することにより、凹溝の内周壁端部の周縁はその全周にわたり前記環状凸部の内側壁へ線状に圧接される。さらに締付を強くすることで、凹溝の内周壁の周縁部は環状凸部の内周壁に圧接された状態を維持しながら配管内方へ撓み、この反発力により継手部からの漏れが一層防止されるのでよい。また、このことは前記周縁部での配管内の製品の滞留部をなくすことにより、最近汚染の原因を少なくすることができるものである。
上記(2)の構造とすることで、さらに配管内製品はよりスムーズに搬送され、細菌による問題発生を一層少なくすることができる。上記(3)の構造とすることで、継手部がへルール継手のような手締めで締め付けるものであっても、無理なく圧接連結でき、密封性の高い継手にすることができる。
Since the present invention has the structure of (1) above, the peripheral edge of the inner peripheral wall end of the concave groove is the inner side of the annular convex part over the entire circumference by fitting and tightening the annular convex part in the concave groove. It is press-contacted linearly to the wall. By further tightening, the peripheral edge of the inner peripheral wall of the groove is bent inwardly while maintaining the state of being pressed against the inner peripheral wall of the annular convex part, and this repulsive force further leaks from the joint part. It is good because it is prevented. Moreover, this can reduce the cause of contamination recently by eliminating the staying part of the product in the pipe at the peripheral edge.
By adopting the structure of (2) above, the in-pipe product can be transported more smoothly and the occurrence of problems due to bacteria can be further reduced. By adopting the structure of (3) above, even if the joint portion is tightened by hand tightening such as a ferrule joint, it can be pressed and connected without difficulty, and a joint with high sealing performance can be obtained.

本発明の配管継手によれば、一対の継手部の凹溝に他方の凸部を嵌入するだけで、それぞれの接合面を線接触状態に圧接することが可能であり、工具を用いずとも、比較的小さな締付力によって継手からの漏れを防止できる。また、手締めにより、簡単に組立、分解出来るので、管と管の接続のみならず、充填タンクと充填ノズルの接続、ポンプやストレーナの接続などの広い分野にわたり適用できるものである。特に、現今の細菌問題重視に伴って多用されているサニタリー式の配管に用いると一層の効果を得ることができる。  According to the pipe joint of the present invention, it is possible to press-contact each joint surface in a line contact state only by inserting the other convex portion into the concave groove of the pair of joint portions, without using a tool, Leakage from the joint can be prevented by a relatively small tightening force. In addition, since it can be easily assembled and disassembled by hand tightening, it can be applied to a wide range of fields such as connection of a filling tank and a filling nozzle, connection of a pump and a strainer, as well as connection of tubes. In particular, when it is used for sanitary piping which is frequently used with the current emphasis on bacterial problems, further effects can be obtained.

本発明を、図面に示す実施の形態を参照として説明する。  The present invention will be described with reference to the embodiments shown in the drawings.

図1は、本発明を使用した一実施の形態を示す斜視図であり、図2は本発明配管継手の嵌合状態の一例を示す断面説明図である。また、図3は本発明に係る継手部の一例の要部断面説明図であり、図4は図3の継手部の嵌合状態の説明図である。図5は本発明に係る継手部の他の例を示す要部断面説明図であり、図6は、パッキンを使用した従来のへルール式の配管継手の分解斜視図である。
図1は、本発明配管継手1を公知のへルールクランプ20で締め付ける構造の継手部として用いた例を示しており、以下、この例に基づいて説明する。
この配管継手1は図3に示すように一対の配管継手部5,5の相対する平坦な衝接面5'、5’があり、一側の衝接面5'に同心円状の凹溝2を形成してあり、他側の衝接面5'には前記凹溝2に嵌合可能な環状凸部3を成形してある。また、前記一側の凹溝2はその内周壁9を凹溝底部4からの一定肉厚部分7とこの一定肉厚部分7から内周壁端部9'へ肉薄となるように傾斜面6として形成してあり、この一対の継手部5,5を嵌合し、前記へルールクランプ20で締付操作することで、前記凹溝2の内周壁9の周縁部9'の全周を前記環状凸部3の内側壁8に線状に圧接できる構造としてある。本実施例においては、図面上明らかでないが凹溝2の傾斜面6の傾斜角は13度としてあり、凸部3の内側壁8の傾斜角は20度に形成してある。従ってこれを圧接することにより、内周壁9の周縁部9'は確実に周縁部9'に沿って線接触し、さらに圧接を強くすることで内周壁9は管の内方へ撓み、その反発力により一層漏れ難くなる構造にしてある。
FIG. 1 is a perspective view showing an embodiment using the present invention, and FIG. 2 is a cross-sectional explanatory view showing an example of a fitting state of the pipe joint of the present invention. FIG. 3 is an explanatory cross-sectional view of a main part of an example of a joint part according to the present invention, and FIG. 4 is an explanatory view of a fitting state of the joint part of FIG. FIG. 5 is an explanatory cross-sectional view of a main part showing another example of the joint according to the present invention, and FIG. 6 is an exploded perspective view of a conventional ferrule-type pipe joint using packing.
FIG. 1 shows an example in which the pipe joint 1 of the present invention is used as a joint part having a structure in which a known ferrule clamp 20 is tightened. The following description is based on this example.
As shown in FIG. 3, the pipe joint 1 has flat contact surfaces 5 'and 5' facing each other, and concentric concave grooves 2 are formed on one of the contact surfaces 5 '. An annular convex portion 3 that can be fitted into the concave groove 2 is formed on the other abutting surface 5 ′. Further, the concave groove 2 on one side is formed as an inclined surface 6 so that the inner peripheral wall 9 is thinned from the concave groove bottom 4 to the constant thickness portion 7 and from the constant thickness portion 7 to the inner peripheral wall end 9 '. By forming the pair of joint portions 5 and 5 and performing a tightening operation with the ferrule clamp 20, the entire circumference of the peripheral edge portion 9 ′ of the inner peripheral wall 9 of the concave groove 2 is annularly formed. In this structure, the inner wall 8 of the convex portion 3 can be linearly pressed. In this embodiment, although not apparent in the drawing, the inclination angle of the inclined surface 6 of the groove 2 is 13 degrees, and the inclination angle of the inner wall 8 of the convex portion 3 is 20 degrees. Therefore, the peripheral edge 9 ′ of the inner peripheral wall 9 is surely brought into line contact along the peripheral edge 9 ′ by press-contacting the inner peripheral wall 9, and the inner peripheral wall 9 bends inwardly of the pipe by further strengthening the press-contact. The structure makes it more difficult to leak due to force.

なお、凹溝2の内周壁9は凹溝2の底部4から内周壁端部9'へ全長一定の肉厚と形成しても環状凸部3の内側壁8に線状に圧接できるのでよいことは勿論のことである。また、この場合は内周壁9の管内方へ撓み状態が違ってくるので、用いる場所、材質、肉厚によってさらに傾斜面をつけるか否かを適宜定めればよいことである。  The inner peripheral wall 9 of the concave groove 2 may be linearly pressed against the inner wall 8 of the annular convex portion 3 even if the inner peripheral wall 9 of the concave groove 2 is formed from the bottom 4 of the concave groove 2 to the inner peripheral wall end 9 'with a constant thickness. Of course. Further, in this case, since the bending state of the inner peripheral wall 9 toward the inside of the pipe is different, it is only necessary to appropriately determine whether or not to add an inclined surface depending on the place of use, material, and thickness.

配管の継手におけるメンテナンスフリーとされているものは、従来からそのシール性を維持するために樹脂系の材料をガスケット(パッキン)に使用している。そのために高温や高圧の環境下ではガスケットの寿命が著しく低下する傾向にあった。これらの環境下にある配管継手としても有効に使用することができるものであり、また配管の洗浄用の洗剤も使用制限がなくなる等、経済的にも価値あるのもとして利用の可能性が高い。  A maintenance-free pipe joint has conventionally used a resin-based material for the gasket (packing) in order to maintain its sealing performance. Therefore, the life of the gasket tends to be remarkably reduced under high temperature and high pressure environment. It can be used effectively as a pipe joint under these circumstances, and there is no possibility to use a detergent for cleaning pipes. .

本発明を使用した一実施形態を示す斜視図The perspective view which shows one Embodiment using this invention 本発明配管継手の嵌入状態の一例を示す断面説明図Cross-section explanatory drawing which shows an example of the insertion state of this invention pipe joint 本発明に係る継手部の一例の要部断面説明図Cross-sectional explanatory drawing of an essential part of an example of a joint according to the present invention 図3の継手部の嵌合状態を示す断面説明図Cross-sectional explanatory drawing which shows the fitting state of the joint part of FIG. 図5は本発明に係る継手部の他の例を示す要部断面説明図FIG. 5 is a cross-sectional explanatory view of the main part showing another example of the joint according to the present invention. パッキンを使用した従来のへルール式配管継手の分解斜視図Exploded perspective view of a conventional ferrule-type pipe joint using packing

符号の説明Explanation of symbols

1 配管継手
2 凹溝
3 凸部
4 凹溝底部
5 継手部
5' 衝接面
6 凹溝傾斜部
7 凹溝一定肉厚部
8 凸部内側壁
9 凹溝内周壁
9' 内周壁端部(周縁部)
20へルールクランプ
DESCRIPTION OF SYMBOLS 1 Piping joint 2 Concave groove 3 Convex part 4 Concave groove bottom part 5 Joint part 5 'Contact surface 6 Concave groove inclination part 7 Concave groove constant thickness part 8 Convex inner wall 9 Concave groove inner peripheral wall 9' Inner peripheral wall edge ( Edge)
Rule clamp to 20

Claims (3)

一対のヘルール継手部の相対する平坦な衝接面の一側面に同心円状の凹溝を形成してあり、他側の衝接面には前記凹溝に嵌合可能な環状凸部を成形してあるヘルール継手において、前記一側の凹溝の内周壁を凹溝底部からの一定肉厚部分として形成するか、又は該一定肉厚部から内周壁端部へ漸次肉薄となるように内周壁の内側面を傾斜面として形成すると共に、前記環状凸部の内側壁をその凸部の端部へ肉薄となるように傾斜面として形成してあり、この一対の継手部を嵌合し、ヘルールクランプにより固定操作することにより前記凹溝の内周壁端部の周縁全周を前記環状凸部の内側壁に周縁部に沿って線接触し、さらに圧接できる構造としてあることを特徴とするヘルール継手。 Concentric concave grooves are formed on one side of the opposing flat abutting surfaces of the pair of ferrule joints, and an annular convex portion that can be fitted into the concave grooves is formed on the other abutting surface. In the ferrule joint, the inner peripheral wall of the concave groove on one side is formed as a constant thick portion from the bottom of the concave groove, or the inner peripheral wall is gradually thinned from the constant thick portion to the end of the inner peripheral wall. of the inner surface so as to form an inclined surface, Yes forms the inner wall of the annular convex portion as an inclined surface so that the thin to the end of the protrusion, fitted with this pair of joint portions, ferrule clamped by line contact along the periphery on the inner wall of the peripheral edge all around the annular convex portion of the inner circumferential wall end portion of the groove by fixing operation, and said that you have a structure capable of further pressing Ferrule fitting. 前記環状凸部の内側壁は前記凹溝の内周壁との圧接位置又はその近傍から、さらに緩やかな傾斜となるような2段傾斜面として形成してある請求項1記載のヘルール継手。 The ferrule joint according to claim 1, wherein the inner wall of the annular convex portion is formed as a two-step inclined surface that has a gentler inclination from a position where it is pressed against the inner peripheral wall of the groove or the vicinity thereof. 前記継手部の相対する平坦な衝接面はへルールクランプにより締結され、該へルールクランプの締付応力により、前記凹溝の内周壁端部が前記凸部の内側壁で押し広げられ配管内方へ撓み可能に凹溝底部と凸部の先端の間には所定の隙間を形成してある請求項1または2記載のヘルール継手。 The opposing flat contact surfaces of the joint portion are fastened by a ferrule clamp, and the inner peripheral wall end of the concave groove is pushed and widened by the inner wall of the convex portion by the tightening stress of the ferrule clamp. 3. A ferrule joint according to claim 1, wherein a predetermined gap is formed between the bottom of the groove and the tip of the protrusion so as to be able to bend in the direction.
JP2004131149A 2004-04-27 2004-04-27 Ferrule fitting Expired - Fee Related JP4376114B2 (en)

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JP4376114B2 true JP4376114B2 (en) 2009-12-02

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