JP2006097722A - Two layer flexible tube - Google Patents
Two layer flexible tube Download PDFInfo
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- JP2006097722A JP2006097722A JP2004281391A JP2004281391A JP2006097722A JP 2006097722 A JP2006097722 A JP 2006097722A JP 2004281391 A JP2004281391 A JP 2004281391A JP 2004281391 A JP2004281391 A JP 2004281391A JP 2006097722 A JP2006097722 A JP 2006097722A
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- flexible tube
- heat
- tube body
- outer peripheral
- shrinkable
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Abstract
Description
本発明は、二層フレキシブルチューブに関し、特に、ふっ素樹脂からなるフレキシブルチューブ体に対して、ふっ素樹脂からなる熱収縮チューブを外周面に形成することにより、繰り返し曲折動作をさせた場合においても、一層目のフレキシブルチューブ体のクラック形成や折損等の損傷の発生の防止及び発生した場合の外部への漏れを防止し、長寿命化及び信頼性向上のための新規な改良に関する。 The present invention relates to a two-layer flexible tube, and in particular, even when a flexible tube body made of a fluorine resin is repeatedly bent by forming a heat-shrinkable tube made of a fluorine resin on the outer peripheral surface. The present invention relates to a novel improvement for preventing the occurrence of damage such as crack formation or breakage of a flexible tube body of an eye and preventing leakage to the outside in the case of occurrence, extending the life and improving the reliability.
従来、用いられていたこの種のフレキシブルチューブにおいては、その構造を開示した特許文献等を示していないが、図２に示す構造が一般に採用されていた。
すなわち、図２において、符号１で示されるものは、断面形状でらせん状をなす曲折自在なフレキシブルチューブ体であり、このフレキシブルチューブ体１は、パーフルオロアルコキシアルカン（ＰＦＡ）（商品名テフロン（登録商標））等のふっ素樹脂で形成されている。
Conventionally, this type of flexible tube does not show any patent document or the like that discloses its structure, but the structure shown in FIG. 2 is generally employed.
That is, in FIG. 2, what is indicated by reference numeral 1 is a flexible tube body that can be bent in a cross-sectional shape, and this flexible tube body 1 is made of perfluoroalkoxyalkane (PFA) (trade name Teflon Trademark)).
前記フレキシブルチューブ体１は、真円状のチューブの外周を製造冶具を用いて螺旋状の溝状に形成することにより、前述のらせん状の形状として、曲折自在な形状に加工したものである。 The flexible tube body 1 is processed into a bendable shape as the aforementioned spiral shape by forming the outer periphery of a perfect circular tube into a spiral groove shape using a manufacturing jig.
従来のフレキシブルチューブは、以上のように構成されているため、次のような課題が存在していた。
すなわち、ふっ素樹脂からなるフレキシブルチューブは、耐薬品性、耐ガス性、耐熱性等の各種特性に優れているため、半導製造装置、薬品製造設備、化学設備等の配管として多用されているが、固定あるいは静的な状態で用いられている場合には問題は発生しないが、フレキシブルチューブの一端を固定した装置に接続し、他端を可動型の装置に接続し、このフレキシブルチューブが繰り返し、曲折動作を行うような場合、らせん状の部分に切れ目やクラックが発生したり、破断するようなこともあった。
従って、前述のような業界においては、曲折動作を繰り返した場合でも、クラックや切れ目等の損傷が発生しにくいフレキシブルチューブの実現が切望されていた。
Since the conventional flexible tube is comprised as mentioned above, the following subjects existed.
In other words, flexible tubes made of fluororesin are widely used as piping for semiconductor manufacturing equipment, chemical manufacturing equipment, chemical equipment, etc. because they are excellent in various properties such as chemical resistance, gas resistance, and heat resistance. No problem occurs when used in a fixed or static state, but one end of the flexible tube is connected to a fixed device, the other end is connected to a movable device, and this flexible tube is repeated, When performing a bending operation, a break or a crack may be generated or broken in a spiral portion.
Accordingly, in the industry as described above, it has been desired to realize a flexible tube which is less likely to be damaged such as cracks and cuts even when the bending operation is repeated.
本発明による二層フレキシブルチューブは、ふっ素樹脂で形成され断面らせん状をなす曲折自在なフレキシブルチューブ体と、前記フレキシブルチューブ体の外周面に形成され前記ふっ素樹脂よりなる熱収縮チューブとからなる構成であり、また、前記熱収縮チューブの厚さは、前記フレキシブルチューブ体の厚さよりも薄く形成されている構成であり、また、前記熱収縮チューブは、前記フレキシブルチューブ体の外周面に形状に沿って密着している構成であり、また、前記熱収縮チューブは、前記フレキシブルチューブ体の外周面の全てに形成されている構成である。 A two-layer flexible tube according to the present invention comprises a flexible tube body that is formed of a fluorine resin and has a spiral cross section, and a heat-shrinkable tube that is formed on the outer peripheral surface of the flexible tube body and is made of the fluorine resin. And the thickness of the heat-shrinkable tube is formed to be thinner than the thickness of the flexible tube body, and the heat-shrinkable tube conforms to the shape of the outer peripheral surface of the flexible tube body. The heat-shrinkable tube is configured to be in close contact, and the heat-shrinkable tube is formed on the entire outer peripheral surface of the flexible tube body.
本発明による二層フレキシブルチューブは、以上のように構成されているため、次のような効果を得ることができる。
すなわち、一層で形成されたふっ素樹脂からなるフレキシブルチューブ体の外周面に対して、ふっ素樹脂からなる熱収縮チューブを形成しているため、例えば、一層目のフレキシブルチューブ体に、化学的又は機械的等の原因でクラック等が発生した場合でも、二層目の熱収縮チューブによって内部を通過する材料等の漏れを防止することができ、寿命及び信頼性を大幅に向上させることができる。
Since the two-layer flexible tube according to the present invention is configured as described above, the following effects can be obtained.
That is, since the heat-shrinkable tube made of fluororesin is formed on the outer peripheral surface of the flexible tube made of fluorine resin formed in a single layer, for example, the first flexible tube body is chemically or mechanically Even when cracks or the like occur due to the above-mentioned causes, leakage of materials passing through the inside can be prevented by the second-layer heat-shrinkable tube, and life and reliability can be greatly improved.
本発明は、ふっ素樹脂からなるフレキシブルチューブ体に対して、ふっ素樹脂からなるフレキシブルチューブ体に対して、ふっ素樹脂からなる熱収縮チューブを外周面に形成することにより、繰り返し曲折動作をさせた場合においても、一層目のフレキシブルチューブ体のクラック形成や折損等の損傷の発生の防止及び発生した場合の外部への漏れを防止し、長寿命化及び信頼性向上を得るようにした二層フレキシブルチューブを提供することを目的とする。 In the case where the flexible tube body made of fluorine resin is repeatedly bent by forming a heat-shrinkable tube made of fluorine resin on the outer peripheral surface of the flexible tube body made of fluorine resin. A two-layer flexible tube that prevents the occurrence of damage such as crack formation and breakage of the first-layer flexible tube body and prevents external leakage when it occurs, and prolongs life and improves reliability. The purpose is to provide.
以下、図面と共に本発明による二層フレキシブルチューブの好適な実施の形態について説明する。
尚、従来例と同一又は同等部分には同一符号を用いて説明する。
図１において、符号１で示されるものは、パーフルオロアルコキシアルカン（ＰＦＡ）（商品名テフロン（登録商標））等のふっ素樹脂からなり、断面らせん状をなすフレキシブルチューブ体であり、一層目のフレキシブルチューブを形成している。
Hereinafter, preferred embodiments of a two-layer flexible tube according to the present invention will be described with reference to the drawings.
The same reference numerals are used for the same or equivalent parts as in the conventional example.
In FIG. 1, what is indicated by reference numeral 1 is a flexible tube body made of a fluororesin such as perfluoroalkoxyalkane (PFA) (trade name: Teflon (registered trademark)) and having a spiral cross section. A tube is formed.
前記フレキシブルチューブ体１の外周面１ａには、前記ふっ素樹脂からなる熱収縮チューブ２が被覆して設けられており、この熱収縮チューブ２は二層目のフレキシブルチューブを形成している。 The outer peripheral surface 1a of the flexible tube body 1 is provided with a heat-shrinkable tube 2 made of the fluororesin, and the heat-shrinkable tube 2 forms a second-layer flexible tube.
前記熱収縮チューブ２は、前記フレキシブルチューブ体１と同一材質であるため、このフレキシブルチューブ体１の外周面１ａに対して、このフレキシブルチューブ体１の外径よりもやや大きい内径の熱収縮チューブ２をかぶせるようにして設け、加熱処理を行うと、熱収縮チューブ２は収縮し、フレキシブルチューブ体１のらせん状の外周面１ａ全面にわたって一体状に密着して形成される。 Since the heat shrinkable tube 2 is made of the same material as the flexible tube body 1, the heat shrinkable tube 2 having an inner diameter slightly larger than the outer diameter of the flexible tube body 1 with respect to the outer peripheral surface 1 a of the flexible tube body 1. When heat treatment is performed, the heat-shrinkable tube 2 contracts and is formed in close contact with the entire helical outer peripheral surface 1a of the flexible tube body 1.
前述の場合、前記フレキシブルチューブ体１と熱収縮チューブ２が同一材質であるため、熱収縮チューブ２を熱収縮させた場合に互いに化学的ななじみが良く、一体状に密着して二層状に形成される。 In the above case, since the flexible tube body 1 and the heat shrinkable tube 2 are made of the same material, when the heat shrinkable tube 2 is heat-shrinked, they are chemically compatible with each other, and are formed in a two-layered form in close contact with each other. Is done.
前述の二層構造の場合、１例として、前記フレキシブルチューブ体１は、厚さが０．５ｍｍ、前記熱収縮チューブ２の厚さが０．３ｍｍで製作し、耐圧テストを行った結果、従来の一層構造のフレキシブルチューブに比較すると、耐久性が飛躍的に増大した。
また、例え、前記フレキシブルチューブ体１が何らかの損傷を受けた場合でも、外側の熱収縮チューブ２に損傷が及ぶことは発生せず、信頼性を大幅に向上させることができる。
In the case of the above-described two-layer structure, as an example, the flexible tube body 1 is manufactured with a thickness of 0.5 mm and the heat-shrinkable tube 2 with a thickness of 0.3 mm. Compared with a flexible tube having a single layer structure, the durability has been dramatically increased.
Moreover, even if the flexible tube body 1 is damaged in some way, the outer heat shrinkable tube 2 is not damaged, and the reliability can be greatly improved.
本発明は、フレキシブルチューブでないストレートのチューブに対しても、耐久性向上のために適用可能である。 The present invention can be applied to a straight tube that is not a flexible tube in order to improve durability.
１ フレキシブルチューブ体
１ａ 外周面
２ 熱収縮チューブ
1 flexible tube body 1a outer peripheral surface 2 heat shrinkable tube
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004281391A JP2006097722A (en) | 2004-09-28 | 2004-09-28 | Two layer flexible tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004281391A JP2006097722A (en) | 2004-09-28 | 2004-09-28 | Two layer flexible tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2006097722A true JP2006097722A (en) | 2006-04-13 |
Family
ID=36237742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004281391A Pending JP2006097722A (en) | 2004-09-28 | 2004-09-28 | Two layer flexible tube |
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|---|---|
| JP (1) | JP2006097722A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5812788U (en) * | 1981-07-18 | 1983-01-26 | 株式会社フジクラ | Shrink tube for corrugated pipe connection |
| JPS62220321A (en) * | 1986-03-22 | 1987-09-28 | Tsutomu Ueno | Manufacture of flexible fluorine resin hose |
| JPS62278394A (en) * | 1986-02-01 | 1987-12-03 | 臼井国際産業株式会社 | Flexible composite hose |
| JPH05118478A (en) * | 1991-03-14 | 1993-05-14 | Seiji Nagayoshi | Flexible composite resin tube |
| JP2000055249A (en) * | 1998-08-07 | 2000-02-22 | Honda Motor Co Ltd | Plastic tube for engine room of automobile |
-
2004
- 2004-09-28 JP JP2004281391A patent/JP2006097722A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5812788U (en) * | 1981-07-18 | 1983-01-26 | 株式会社フジクラ | Shrink tube for corrugated pipe connection |
| JPS62278394A (en) * | 1986-02-01 | 1987-12-03 | 臼井国際産業株式会社 | Flexible composite hose |
| JPS62220321A (en) * | 1986-03-22 | 1987-09-28 | Tsutomu Ueno | Manufacture of flexible fluorine resin hose |
| JPH05118478A (en) * | 1991-03-14 | 1993-05-14 | Seiji Nagayoshi | Flexible composite resin tube |
| JP2000055249A (en) * | 1998-08-07 | 2000-02-22 | Honda Motor Co Ltd | Plastic tube for engine room of automobile |
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