JPH02256991A - Tightening structure of rubber hose with joint metal fitting - Google Patents

Tightening structure of rubber hose with joint metal fitting

Info

Publication number
JPH02256991A
JPH02256991A JP1079168A JP7916889A JPH02256991A JP H02256991 A JPH02256991 A JP H02256991A JP 1079168 A JP1079168 A JP 1079168A JP 7916889 A JP7916889 A JP 7916889A JP H02256991 A JPH02256991 A JP H02256991A
Authority
JP
Japan
Prior art keywords
rubber
rubber hose
inner pipe
outer sleeve
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.)
Pending
Application number
JP1079168A
Other languages
Japanese (ja)
Inventor
Hiroshi Mori
啓 森
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.)
Kurashiki Kako Co Ltd
Original Assignee
Kurashiki Kako 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 Kurashiki Kako Co Ltd filed Critical Kurashiki Kako Co Ltd
Priority to JP1079168A priority Critical patent/JPH02256991A/en
Publication of JPH02256991A publication Critical patent/JPH02256991A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To improve seal performance at a high temperature by calking an outer sleeve by a specific rate and interposing a thermoreactive adhesive agent layer in an inner pipe, in the case of a tightening structure by the inner pipe and the outer sleeve. CONSTITUTION:A tightening structure is for a rubber hose 10 formed by tightening its end part by a joint metal fixture comprising an inner pipe 1 and an outer sleeve 2 pressed out to the inner pipe. The outer sleeve 2 is calked by a rate set to 10 to 30% for the thickness of the rubber hose 10. Further a thermoreactive adhesive agent layer 3 is interposed between the inner pipe 1 and internal surface rubber 10a of the rubber hose 10. As a result, the structure is excellent in durability by vibration with no concentration of stress applied to a calking part even in use for a long period. Also even under an environment at a rising temperature, adhesive force is prevented from deteriorating.

Description

【発明の詳細な説明】[Detailed description of the invention] 【産業上の利用分野】[Industrial application field]

本発明は、車輌、自動車等に用いられるクーラーホース
をはじめとして、フレオンホース、ガスホース、高圧ホ
ース等に用いられるゴムホースの接続構造にかかるもの
であって、インナーパイプとスリーブ継手金具との間に
ゴムホースの端部を挿入して、締着した継手金具付ゴム
ホースの接続構造に関するものである。 (従来の技術] 上記のような目的で用いられるゴムホースは、その殆ど
が中間層に繊維補強層を有するが、その気密性、耐圧性
が、近年、更に要求されるようになり、インナーパイプ
とスリーブ継手金具との間にゴムホースの端部を挿入し
て締着した継手金具付ゴムホースとして使用されること
が多くなった。 このゴムホースと継手金具との締着には、スリーブの外
周を複数個のダイスによりかしめて、スリーブを塑性変
形させて、ゴムホースをインナーパイプとスリーブの間
に圧縮締着させる方法がとられる。ところが、ただ単に
スリーブをかしめるだけでは、充分なシール性、耐圧性
が得られないので、これまでインナーパイプ外周に凹状
溝や環状突起を設けたり、スリーブのかしめ形状を変え
たり、かしめ部を何重にも設けるいわゆる多段締め等の
方法が従来とられている。これらのかしめ率は概ね30
%以上とされてきた。 また、これと関連して、ダイス形状を変えることも行な
われてきた。更に、インナーパイプ外周又はスリーブ内
周に鋭角の突条あるいは環状突起を設けて係り止めする
か、あるいは、噛み込ませる方法やスリーブのかしめ率
を上げて補強ホース締着部の圧縮率を上げる方法も従来
知られている。 更に、ゴムホースの端部にエポキシ樹脂、ポリウレタン
樹脂などの常温硬化性の樹脂を介して継手金具で結着し
た構造も提案されている(特公昭51−30296号)
The present invention relates to a connection structure for rubber hoses used in cooler hoses used in vehicles, automobiles, etc., as well as freon hoses, gas hoses, high-pressure hoses, etc., in which the rubber hose is connected between an inner pipe and a sleeve joint fitting. This relates to a connection structure for a rubber hose with a fitting fitting, in which the end of the fitting is inserted and tightened. (Prior art) Most of the rubber hoses used for the above purposes have a fiber reinforced layer in the middle layer, but in recent years, the airtightness and pressure resistance of the hoses have become even more required, and inner pipes and It is now often used as a rubber hose with a fitting fitting, in which the end of the rubber hose is inserted between the sleeve fitting fitting and tightened.To fasten this rubber hose and the fitting fitting, multiple outer circumferences of the sleeve are used. The rubber hose is compressed and fastened between the inner pipe and the sleeve by crimping it with a die, plastically deforming the sleeve, and compressing the rubber hose between the inner pipe and the sleeve.However, simply crimping the sleeve does not provide sufficient sealing performance and pressure resistance. Therefore, conventional methods have been used, such as providing a concave groove or annular protrusion on the outer circumference of the inner pipe, changing the shape of the sleeve, and so-called multi-stage tightening in which the crimped portion is provided in multiple layers. The caulking rate is approximately 30
% or more. Additionally, in connection with this, attempts have been made to change the shape of the die. Furthermore, there are methods to lock the inner pipe by providing sharp ridges or annular protrusions on the outer periphery of the inner pipe or the inner periphery of the sleeve, or to increase the compression ratio of the reinforced hose fastening part by increasing the swaging ratio of the sleeve. is also conventionally known. Furthermore, a structure has also been proposed in which the end of a rubber hose is connected with a joint fitting via a resin that hardens at room temperature, such as an epoxy resin or a polyurethane resin (Japanese Patent Publication No. 30296/1983).
.

【発明が解決しようとする課題】[Problem to be solved by the invention]

・ところが、インナーパイプとスリーブの間にゴムホー
ス締着部を挾持して締着した構造において、従来のよう
にかしめ率を30%以上とした場合、長期間の使用でか
しめ部に集中応力が掛かり、振動による耐久性に劣る問
題点が指摘されていた。 また、最近の排気ガス対策などの影響によるエンジンル
ームの高温化により、100〜120℃以上の高温雰囲
気中でエポキシ樹脂やポリウレタン樹脂等の常温硬化性
の樹脂は、融点あるいは熱変形温度が概して100℃以
下であるので雰囲気温度によって軟化し、継手金具によ
るゴムホースの結着力が大きく低下する問題点があった
。 更に、自動車ホース等の多量生産においては、上記の樹
脂は■常高粘度液状の状態を呈するので、塗布加工性に
劣り、そして、ポットライフも短いため1時間的にも、
また、組立工程におけるレイアウトの面からも制約が多
いなどの課題を有していた。
・However, in a structure in which the rubber hose fastening part is sandwiched between the inner pipe and the sleeve and tightened, if the caulking ratio is set to 30% or more as in the past, concentrated stress will be applied to the caulked part after long-term use. , it was pointed out that there was a problem with poor durability due to vibration. In addition, due to the rise in engine room temperatures due to recent exhaust gas countermeasures, the melting point or heat distortion temperature of resins that harden at room temperature, such as epoxy resins and polyurethane resins, in a high-temperature atmosphere of 100 to 120 degrees Celsius or higher is generally 100 degrees. ℃ or lower, it softens depending on the ambient temperature, and there is a problem in that the binding force of the rubber hose with the fitting is greatly reduced. Furthermore, in the mass production of automobile hoses, etc., the above-mentioned resins are usually in a highly viscous liquid state, resulting in poor coating processability and a short pot life, so even in one hour,
Furthermore, there were also problems in that there were many restrictions in terms of layout during the assembly process.

【課題を解決するための手段】[Means to solve the problem]

本発明は上記のような継手金具を用いたゴムホースの締
着構造における従来の課題を、以下に示すような構造と
することによって、解決したのである。 すなおち、ホース(10)端部をインナーパイプ(1)
とそのインナーパイプへ外挿されたアウタースリーブ(
2)からなる継手金具で締着したゴムホースの締着構造
において、アウタースリーブ(2)のゴムホース肉厚に
対するかしめ率を10〜30%とし、さらに、少なくと
もインナーパイプ(1)とゴムホース内面ゴム(10a
)との間に熱反応性接着剤層(3)を介在させた締着構
造を開発したのである。ここにいう少なくともとは、上
記間のほかにアウタースリーブ(2)とゴムホース外面
ゴム(10b)との間にも熱反応性接着剤層(3)を形
成する場合もありうるからである。 この構造にあって、内面ゴム(10a)がアクリロニト
リルブタジェン系ゴムからなり、熱反応性接着剤がゴム
用接着剤組成物又はフェノール樹脂系組成物又はハロゲ
ン化ポリマー系組成物からなる場合が、特に好ましい本
発明の実施態様である。 ここにいうゴム用接着剤組成物とは、不揮発性インシア
ナートを主剤として、ゴムと金属の加硫接着に使用され
る接着剤組成物のことをいう。 また、フェノール樹脂系組成物とはフェノールとホルム
アルデヒドを主体とするフェノール樹脂のうち、熱反応
温度が少なくとも130℃以上のものの単体、あるいは
それとNBRの混合物を溶剤分散したものをいう。 ハロゲン化ポリマー系組成物とは塩化ゴムあるいはクロ
ロプレンゴム、塩化ポリプロピレン、臭素化ポリマーな
どを溶剤分散したものをいう、これを実際には塗布して
溶剤を揮発して用いる。 更に、アウタースリーブ(2)とインナーパイプ(1)
との間に押入するゴムホースの内周面の少なくとも一部
を塩素化処理することによって、より強固な締着構造と
なり得る。この塩素化処理はイソシアヌル酸の塩素化物
、次亜ハロゲン酸アルキル、次亜ハロゲン酸塩、亜塩素
酸ナトリウムなどが適している。少なくとも一部とは、
この塩素化処理が、接着面の前処理として、前述した理
由により、上記間以外にも使用されることがあるからで
ある。
The present invention has solved the conventional problems in the rubber hose fastening structure using the above-mentioned joint fittings by providing the following structure. In other words, connect the end of the hose (10) to the inner pipe (1)
and the outer sleeve (
2), the caulking ratio of the outer sleeve (2) to the rubber hose wall thickness is set to 10 to 30%, and at least the inner pipe (1) and the rubber hose inner surface rubber (10a
) and developed a fastening structure in which a heat-reactive adhesive layer (3) is interposed between the two. The term "at least" here means that the heat-reactive adhesive layer (3) may also be formed between the outer sleeve (2) and the outer rubber of the rubber hose (10b) in addition to the above-mentioned space. In this structure, when the inner surface rubber (10a) is made of acrylonitrile butadiene rubber and the heat-reactive adhesive is made of a rubber adhesive composition, a phenolic resin composition, or a halogenated polymer composition, This is a particularly preferred embodiment of the invention. The term "rubber adhesive composition" as used herein refers to an adhesive composition containing nonvolatile incyanate as a main ingredient and used for vulcanization bonding of rubber and metal. Furthermore, the term phenol resin composition refers to a phenol resin mainly composed of phenol and formaldehyde, which has a thermal reaction temperature of at least 130° C. or higher, or a mixture of it and NBR dispersed in a solvent. The halogenated polymer composition refers to a composition in which chlorinated rubber, chloroprene rubber, chlorinated polypropylene, brominated polymer, or the like is dispersed in a solvent, and it is actually used by coating and evaporating the solvent. Furthermore, the outer sleeve (2) and inner pipe (1)
By chlorinating at least a portion of the inner circumferential surface of the rubber hose inserted between the rubber hose and the rubber hose, a stronger fastening structure can be obtained. Suitable for this chlorination treatment are chlorinated isocyanuric acid, alkyl hypohalite, hypohalite, sodium chlorite, and the like. At least some of the
This is because this chlorination treatment is sometimes used as a pretreatment of the bonding surface for reasons other than those mentioned above.

【作用】[Effect]

継手金具付ゴムホースの締着構造を以上のようにインナ
ーパイプ(1)とゴムホース内面ゴム(10a)との間
に熱反応性接着剤層(3)を介在させると、乾燥状態の
熱反応性接着剤を介することにより、加工時のハンドリ
ングが容易となり、また、高温雰囲気中でもエポキシ樹
脂、ポリウレタン樹脂などの低融点、低熱変形温度の樹
脂を介した場合のように、高温で軟化して締着力が低下
するといったことがなく、むしろ、使用中の熱履歴によ
り接着が進行してシール性が向上するため、アウタース
リーブ(2)のゴムホース肉厚に対するかしめ率を10
〜30%に下げることができ、振動耐久性の向上作用が
得られる。 特に、内面ゴム(10a)がアクリロニトリルブタジェ
ン(NBR)系ゴムであると、熱反応性接着剤のフェノ
ール樹脂系組成物だけで金属性インナーパイプと内面ゴ
ムの強力な接着力を発揮する。 アウタースリーブ(2)とインナーパイプ(1)との間
に挿入するゴムホースの内周面の一部を塩素化処理する
ことによって、更に強固な接続構造となる。
By interposing the heat-reactive adhesive layer (3) between the inner pipe (1) and the inner rubber of the rubber hose (10a) in the fastening structure of the rubber hose with fittings as described above, dry heat-reactive adhesive is formed. By using an agent, handling during processing becomes easier, and even in a high-temperature atmosphere, it softens at high temperatures and increases the fastening force, as in the case of using resins with low melting points and low heat distortion temperatures such as epoxy resins and polyurethane resins. Rather, adhesion progresses due to heat history during use and sealing performance improves.
It can be lowered to ~30%, and an effect of improving vibration durability can be obtained. In particular, when the inner surface rubber (10a) is an acrylonitrile butadiene (NBR) rubber, the phenolic resin composition of the heat-reactive adhesive alone exhibits strong adhesion between the metallic inner pipe and the inner surface rubber. By chlorinating a portion of the inner peripheral surface of the rubber hose inserted between the outer sleeve (2) and the inner pipe (1), an even stronger connection structure can be achieved.

【実施例1 以下実施例によって本発明の詳細な説明する。 第1図にクーラーホースアセンブリーに本発明を実施し
た場合を断面図で示した。 本実施例において、剛性インナーパイプ(1)の先端ニ
ップル部分には管状突起(3)が設けられている。これ
は他の凹凸形状でも差支えない、このインナーパイプへ
内面ゴム(10a)と外面ゴム(10b)とからなるゴ
ムホースが外挿され、そして、その外周を7ウタースリ
ーブ(2)からなる継手金具で締着している。内面ゴム
(10n)は、この例ではNBR系であり、外面ゴム(
10b)はEPDM系ゴムである。内面ゴム(10a)
のインナーパイプに接する部分はトリクロロイソシアヌ
ル酸による塩素化を行なっている。さらに、インナーパ
イプへの外挿の前工程において、熱反応性接着剤である
フェノール樹脂系組成物を塗布し、80℃×30分の熱
処理を経ている。前述したように、この接着剤は塩化ゴ
ム等のハロゲン化ポリマー系組成物でもよい。 このような内部構造で、ゴムホースに外挿した金属性の
アウタースリーブ(2)のゴムホース肉厚に対するかし
め率を変化させた場合における引張強さの試験結果を第
1表に示した。 第1表 ×振動耐久テスト条件 実車取付けと同じ状態でホースアッセンブリーに冷媒P
12を封入してコンプレッサー取付は側を、振幅±1.
6++m、振動サイクル30回/seeにて加振し、雰
囲気温度100℃、ガス圧(高圧側30kgf/cd、
低圧側15kgf/aJ)という条件下での異常な破壊
、変形の有無を調べる。 インナーパイプ(1)とゴムホース内面ゴム(10a)
との間に低融点硬化性樹脂であるエポキシ樹脂系接着剤
を介在させて、しかも、従来のようにかしめ率を36.
5%(比較例1)とすると、かしめ直後において750
kgもの引張強さ(保持力)が得られる。 しかし、120℃雰囲気で48時間経過した場合、56
0瞳に引張強さが低下している。ところが、実施例1.
2の場合、 かしめ直後の引張強さが比較例はどには強
くないものの、 120℃雰囲気で48時間経過した場
合、逆に引張強さが増し、使用中の熱履歴により接着が
進行してシール性が向上することが裏づけられている。 更に、熱反応性接着剤を介在させないで、従来のように
かしめ率を36.5%(比較例2)とすると、かしめ直
後の引張強さが実施例2よりは大きいものの、120℃
雰囲気で48時間経過した後には、引張強さが実M例2
よりも遥かに小さな値となっているのが分かる。 又、100℃雰囲気下での振動耐久テストにより、エポ
キシ樹脂系接着剤使用、不使用にかかわらず。 かしめ率36.5%(比較例1.2)では既に75万回
以下でオイル洩れを生じるのに対し、実施例1.2では
共に100万回でも異常はなく、耐久性が大きく向上し
ているのがわかる。 【発明の効果】 継手金具付ゴムホースの締着構造を以上のように、熱反
応性接着剤を用い、低いかしめ率としたことによって、
長期間の使用でもかしめ部に集中応力が掛かることなく
、振動による耐久性に優れたものとなった。 また、最近の排気ガス対策などの影響によるエンジンル
ームの高温化にも、結着力が低下することがなくなった
。 更に、自動車ホース等の多量生産において、塗布加工性
に優れ、そして、ポットライフを考慮しなくてもよいた
め、時間的にも、また、組立工程におけるレイアウトの
面からも制約が少なく、特に締着後の加熱処理を必ずし
も行なう必要がないため、Il造工程の難点を解決する
ことができた。
[Example 1] The present invention will be explained in detail with reference to Examples below. FIG. 1 shows a cross-sectional view of a cooler hose assembly in which the present invention is implemented. In this embodiment, a tubular projection (3) is provided at the tip nipple portion of the rigid inner pipe (1). A rubber hose made of inner rubber (10a) and outer rubber (10b) is inserted into this inner pipe, and its outer periphery is connected to a fitting made of a 7 outer sleeve (2). It is fastened. The inner surface rubber (10n) is NBR type in this example, and the outer surface rubber (10n) is NBR type in this example.
10b) is an EPDM rubber. Inner rubber (10a)
The part in contact with the inner pipe is chlorinated with trichloroisocyanuric acid. Furthermore, in a step prior to extrapolation to the inner pipe, a phenolic resin composition, which is a heat-reactive adhesive, was applied and heat treated at 80° C. for 30 minutes. As previously mentioned, the adhesive may be a halogenated polymer based composition such as chlorinated rubber. Table 1 shows the tensile strength test results when the caulking ratio of the metallic outer sleeve (2) fitted onto the rubber hose with such an internal structure was varied with respect to the wall thickness of the rubber hose. Table 1 × Vibration durability test conditions Refrigerant P is attached to the hose assembly under the same conditions as when installed on the actual vehicle.
12 and install the compressor on the side, amplitude ±1.
6++m, vibration cycle 30 times/see, ambient temperature 100℃, gas pressure (high pressure side 30kgf/cd,
Check for abnormal destruction or deformation under conditions of low pressure (15 kgf/aJ). Inner pipe (1) and rubber hose inner surface rubber (10a)
An epoxy resin adhesive, which is a low melting point curable resin, is interposed between the two and the caulking rate is 36.
5% (comparative example 1), 750 immediately after caulking
A tensile strength (holding force) of up to 1 kg can be obtained. However, after 48 hours in a 120℃ atmosphere, 56
Tensile strength decreases at 0 pupil. However, Example 1.
In case 2, the tensile strength immediately after caulking is not as strong as that of the comparative example, but after 48 hours in a 120℃ atmosphere, the tensile strength increases, indicating that adhesion has progressed due to the heat history during use. It is proven that sealing performance is improved. Furthermore, if the caulking ratio is set to 36.5% as in the conventional method (Comparative Example 2) without intervening a heat-reactive adhesive, the tensile strength immediately after caulking is higher than that of Example 2, but at 120°C.
After 48 hours in the atmosphere, the tensile strength was that of Actual M Example 2.
It can be seen that the value is much smaller than that of . In addition, a vibration durability test was conducted in an atmosphere of 100℃, regardless of whether epoxy resin adhesive was used or not. With a caulking rate of 36.5% (Comparative Example 1.2), oil leakage already occurs after 750,000 cycles or less, whereas in Example 1.2, there was no abnormality even after 1 million cycles, and the durability was greatly improved. I can see that you are there. [Effects of the Invention] As described above, by using a heat-reactive adhesive and achieving a low caulking rate for the fastening structure of the rubber hose with fittings,
Even after long-term use, no concentrated stress is applied to the caulked parts, resulting in excellent durability against vibrations. In addition, the binding strength no longer decreases even when the temperature in the engine room increases due to recent exhaust gas countermeasures. Furthermore, in the mass production of automobile hoses, etc., it has excellent coating processability and there is no need to consider pot life, so there are fewer restrictions in terms of time and layout in the assembly process, and it is especially easy to tighten. Since it is not necessary to carry out heat treatment after deposition, the difficulties in the Il manufacturing process could be solved.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の継手金具付ゴムホースの締着構造の実
施例の断面図である。 (1)剛性インナーパイプ (2)アウタースリーブ(
3)熱反応性接着剤層  (10a)内面ゴム(tab
)外面ゴム 以上 出頴人 倉敷化工株式会社
FIG. 1 is a cross-sectional view of an embodiment of a fastening structure for a rubber hose with a fitting according to the present invention. (1) Rigid inner pipe (2) Outer sleeve (
3) Heat-reactive adhesive layer (10a) Inner rubber (tab
) Outer surface rubber and more Kurashiki Kako Co., Ltd.

Claims (1)

【特許請求の範囲】 1 ホース(10)端部をインナーパイプ(1)と該イ
ンナーパイプへ外挿されたアウタースリーブ(2)から
なる継手金具で締着してなるゴムホースの締着構造にお
いて、アウタースリーブ(2)のゴムホース肉厚に対す
るかしめ率が10〜30%であり、少なくともインナー
パイプ(1)とゴムホース内面ゴム(10a)との間に
熱反応性接着剤層(3)が介在することを特徴とする継
手金具付ゴムホースの締着構造。 2 内面ゴム(10a)がアクリロニトリルブタジエン
系ゴムからなり、熱反応性接着剤層(3)を形成する接
着剤がゴム用接着剤組成物、フェノール樹脂系組成物又
はハロゲン化ポリマー系組成物からなる請求項1記載の
継手金具付ゴムホースの締着構造。 3 請求項1記載の継手金具付ゴムホースの締着構造に
おいて、アウタースリーブ(2)とインナーパイプ(1
)との間に挿入するゴムホースの内周面の少なくとも一
部を塩素化処理してなることを特徴とする継手金具付ゴ
ムホースの締着構造。
[Claims] 1. A rubber hose fastening structure in which the end of a hose (10) is fastened with a fitting made of an inner pipe (1) and an outer sleeve (2) fitted onto the inner pipe, The caulking ratio of the outer sleeve (2) to the rubber hose wall thickness is 10 to 30%, and a heat-reactive adhesive layer (3) is interposed between at least the inner pipe (1) and the inner rubber of the rubber hose (10a). A fastening structure for rubber hoses with fittings featuring: 2. The inner surface rubber (10a) is made of acrylonitrile butadiene rubber, and the adhesive forming the heat-reactive adhesive layer (3) is made of a rubber adhesive composition, a phenolic resin composition, or a halogenated polymer composition. A fastening structure for a rubber hose with a fitting according to claim 1. 3. In the fastening structure for a rubber hose with a fitting according to claim 1, the outer sleeve (2) and the inner pipe (1)
) A fastening structure for a rubber hose with a fitting fitting, characterized in that at least a part of the inner peripheral surface of the rubber hose inserted between the rubber hose and the rubber hose is chlorinated.
JP1079168A 1989-03-29 1989-03-29 Tightening structure of rubber hose with joint metal fitting Pending JPH02256991A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1079168A JPH02256991A (en) 1989-03-29 1989-03-29 Tightening structure of rubber hose with joint metal fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1079168A JPH02256991A (en) 1989-03-29 1989-03-29 Tightening structure of rubber hose with joint metal fitting

Publications (1)

Publication Number Publication Date
JPH02256991A true JPH02256991A (en) 1990-10-17

Family

ID=13682442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1079168A Pending JPH02256991A (en) 1989-03-29 1989-03-29 Tightening structure of rubber hose with joint metal fitting

Country Status (1)

Country Link
JP (1) JPH02256991A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9621618B2 (en) * 2014-12-22 2017-04-11 Telefonaktiebolaget Lm Ericsson (Publ) Packet analyzer device and method to measure a video quality of transmitted IP multicast media

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9621618B2 (en) * 2014-12-22 2017-04-11 Telefonaktiebolaget Lm Ericsson (Publ) Packet analyzer device and method to measure a video quality of transmitted IP multicast media

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