JP3414677B2 - Method for manufacturing flexible tube for endoscope - Google Patents
Method for manufacturing flexible tube for endoscopeInfo
- Publication number
- JP3414677B2 JP3414677B2 JP24785999A JP24785999A JP3414677B2 JP 3414677 B2 JP3414677 B2 JP 3414677B2 JP 24785999 A JP24785999 A JP 24785999A JP 24785999 A JP24785999 A JP 24785999A JP 3414677 B2 JP3414677 B2 JP 3414677B2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- flex
- endoscope
- flexible tube
- manufacturing
- 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
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、内視鏡の挿入部等
に用いられる内視鏡用可撓管の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a flexible tube for an endoscope used in an insertion portion of the endoscope.
【０００２】[0002]
【従来の技術】一般に、内視鏡用可撓管は図１で示すよ
うに金属製帯状体を旋状に巻回してなるフレックス１の
外周に、ブレード（網管）２を被嵌し、このブレード２
の外周を樹脂製外皮３で被覆したものである。そして、
上記ブレード２は図２で示すように複数本の素線４を１
組として、このワイヤ組５を何組か用いて平織りしてな
るが、これは織り機によりフレックス１の外周上に直接
筒状に織るようにしている。2. Description of the Related Art Generally, in a flexible tube for an endoscope, as shown in FIG. 1, a blade (mesh tube) 2 is fitted on the outer circumference of a flex 1 formed by winding a metal strip in a spiral shape. Blade 2
The outer circumference of is covered with a resin outer cover 3. And
The blade 2 has a plurality of strands 4 as shown in FIG.
As a set, some of the wire sets 5 are used for plain weaving, which is woven directly on the outer circumference of the flex 1 into a tubular shape by a weaving machine.
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記ブレー
ド２は図２で示すようにワイヤ組５を縦糸と横糸として
打ち違えて組むから、その表面に凹凸が現われ、これが
外皮にも現われてしまう。そして、挿入性を損なったり
患者に苦痛を与えたりするという欠点があった。However, as shown in FIG. 2, the braid 2 is formed by striking the wire set 5 as warp yarns and weft yarns, so that irregularities appear on the surface and also appear on the outer skin. Further, there are drawbacks such that the insertability is impaired and the patient suffers.
【０００４】この場合、ブレード２の密度を高めると、
それだけ凹凸がなだらかで小さくなるが、図２で示すよ
うに織ったときの縦糸と横糸の各組み角（バイアス角）
θが一定以上に大きくなり、ブレード２を織ることが困
難になる。従来はその組み角θを４８゜〜５４゜にして
あるが、これ以上に密度を高めることができないと共
に、織り上げることが難しかった。In this case, if the density of the blade 2 is increased,
The unevenness is gentle and small, but each braid angle (bias angle) of the warp and weft when woven as shown in FIG.
θ becomes greater than a certain value, making it difficult to weave the blade 2. In the past, the braid angle θ was set to 48 ° to 54 °, but it was difficult to raise the density further and weaving was difficult.
【０００５】本発明は上記問題点に着目してなされたも
ので、その目的とするところはブレードの密度を高め、
ブレード表面の凹凸が少くなるとともに、そのブレード
を織ることが容易な内視鏡用可撓管の製造方法を提供す
ることにある。The present invention has been made in view of the above problems, and its purpose is to increase the density of blades,
An object of the present invention is to provide a method for manufacturing a flexible tube for an endoscope, in which unevenness on the blade surface is reduced and the blade can be easily woven.
【０００６】[0006]
【課題を解決するための手段および作用】請求項１に係
る発明は、フレックスの外周にブレードを被嵌し、その
ブレードの外周を外皮で被覆する内視鏡用可撓管の製造
方法において、帯状板を螺旋状に巻回したフレックスに
離型剤を塗布する工程と、上記フレックスの外径と同等
より小さい外径を有する巻芯を用い、この巻芯の外周に
組み角４５゜以上でブレードを織り、このブレードを巻
芯から取り外して、上記フレックスの外周に被嵌するこ
とを特徴とする内視鏡用可撓管の製造方法である。The invention according to claim 1 is a method for manufacturing a flexible tube for an endoscope, wherein a blade is fitted on the outer circumference of a flex, and the outer circumference of the blade is covered with an outer skin. A step of applying a release agent to a flex in which a strip plate is spirally wound, and a core having an outer diameter smaller than the outer diameter of the flex are used, and the winding angle is 45 ° or more on the outer circumference of the core. A method of manufacturing a flexible tube for an endoscope, comprising weaving a blade, removing the blade from the winding core, and fitting the blade onto the outer circumference of the flex.
【０００７】上記ブレードを織るときはフレックスの外
径よりやや小さい外径の巻芯を用いてその外周に筒状に
組みあげていく。このときの組み角は４５°以上で４５
゜近くであるため、容易に織ることができる。このよう
に織ったブレードをフレックスの外周に被嵌したときに
はそのブレードの組み角が４５゜以上に増大し、ブレー
ドの密度が増大する。When weaving the above blade, a winding core having an outer diameter slightly smaller than the outer diameter of the flex is used to assemble it into a cylindrical shape on the outer periphery thereof. The angle of assembly at this time is 45 ° or more and 45
Since it is near °, it can be easily woven. When the blade woven in this manner is fitted on the outer periphery of the flex, the braid angle of the blade increases to 45 ° or more, and the density of the blade increases.
【０００８】請求項２に係る発明は、上記ブレードが、
金属製のワイヤ、若しくは金属製のワイヤと樹脂製のワ
イヤとの混合した糸を用いて織られる事を特徴とする請
求項１に記載の内視鏡用可撓管の製造方法である。In the invention according to claim 2, the blade is
The method for manufacturing a flexible tube for an endoscope according to claim 1, wherein the flexible tube for an endoscope is woven using a wire made of a metal or a mixed thread of a wire made of a metal and a wire made of a resin.
【０００９】請求項３に係る発明は、フレックスの外周
にブレードを被嵌し、そのブレードの外周を外皮で被覆
する内視鏡用可撓管の製造方法において、帯状板を螺旋
状に巻回してフレックスを作る工程と、上記フレックス
の外径と同等より小さい外径を有する巻芯を用い、この
巻芯の外周に組み角４５°以上でブレードを織り、この
ブレードを巻芯から取外して、上記フレックスの外周に
被嵌することを特徴とする内視鏡用可撓管の製造方法で
ある。According to a third aspect of the present invention, in a method of manufacturing a flexible tube for an endoscope in which a blade is fitted on the outer circumference of a flex and the outer circumference of the blade is covered with an outer cover, a strip plate is spirally wound. And a step of making a flex, and using a core having an outer diameter smaller than the outer diameter of the flex, a blade is woven on the outer periphery of the core at a forming angle of 45 ° or more, and the blade is removed from the core. A method for manufacturing a flexible tube for an endoscope, characterized in that the flexible tube is fitted onto the outer circumference of the flex.
【００１０】請求項４に係る発明は、上記ブレードが、
金属製のワイヤ、若しくは金属製のワイヤと樹脂製のワ
イヤとの混合した糸を用いて織られる事を特徴とする請
求項３に記載の内視鏡用可撓管の製造方法である。According to a fourth aspect of the invention, the blade is
The method for manufacturing a flexible tube for an endoscope according to claim 3, wherein the flexible tube for an endoscope is woven by using a wire made of metal or a thread in which a wire made of metal and a wire made of resin are mixed.
【００１１】[0011]
【発明の実施の形態】図２ないし図４において
Ｄ：ブレード２の内径
θ：素線４がブレード２の中心軸となす角
Ｌ：リード
ｄ：素線４の径
ｍ：ワイヤ組５の素線持ち数
ｎ：打数（織り機におけるボビン数）
とする。ブレード２が伸縮する際、１リードＬで費され
る素線４の長さは不変であり、これをｌとすると、次の
式が成り立つ。2 to 4, D: inner diameter of the blade 2, θ: angle formed by the wire 4 with the central axis of the blade L: lead d: diameter of the wire m: element of the wire set 5 Number of lines n: Number of strokes (number of bobbins on the loom). When the blade 2 expands and contracts, the length of the wire 4 consumed by one lead L does not change, and if this is l, the following equation holds.
【００１２】
Ｌ ＝ｌcosθ … (1)
πＤ＝ｌsinθ … (2)
一方、ブレード２の疎密状態を表わすための目安として
の密度（充填率）ρを次の式で表わす。
ρ＝（ｄ・ｍ・ｎ）／（ｌsin２θ）＝（ｄ・ｍ・ｎ）／（２πＤcosθ）
… (3)
すなわち、ブレード２の表面を図５のような構成単位に
分けて考えるとき、
密度ρ＝ｑ′／Ｑ … (4)
と定義する。つまり、密度ρを面積ではなく線分の比率
として考えるのである。L = lcos θ (1) πD = 1lsin θ (2) On the other hand, the density (filling rate) ρ as a standard for representing the sparse and dense state of the blade 2 is expressed by the following formula. ρ = (d · m · n) / (lsin2θ) = (d · m · n) / (2πDcosθ) (3) That is, when considering the surface of the blade 2 by dividing it into constituent units as shown in FIG. It is defined as ρ = q '/ Q (4). That is, the density ρ is considered as the ratio of line segments, not the area.
【００１３】
また、Ｑ＝Ｌ／（ｎ/2）＝（２Ｌ）／ｎ … (5)
ｑ′＝（ｄ・ｍ）／sinθ … (6)
したがって、（５），（６）式を（４）式に代入する
と、
ρ＝（ｄ・ｍ・ｎ）／（２Ｌsinθ）
（１）式より
ρ＝（ｄ・ｍ・ｎ）／（ｌsin２θ） … (７)
よって、上記密度ρを表わす（３）式が得られる。Further, Q = L / (n / 2) = (2L) / n (5) q ′ = (d · m) / sin θ (6) Therefore, equations (5) and (6) are changed to ( Substituting into the equation 4), ρ = (d · m · n) / (2Lsinθ) From the equation (1), ρ = (d · m · n) / (lsin2θ) (7) Therefore, the above density ρ is expressed ( Equation 3) is obtained.
【００１４】そして、ブレード２の密度ρは組み角θが
４５°で最小値をとり、一方、このとき、ブレード２が
最も織りやすい。つまり、可撓管としてはブレード２の
密度ρが大きいほうが望ましいが、編組上はその組み角
θが４５°に近いほうがよい。The density ρ of the blade 2 has a minimum value when the braiding angle θ is 45 °, while the blade 2 is the easiest to weave. That is, as the flexible tube, it is desirable that the density ρ of the blade 2 is large, but the braid angle θ is preferably close to 45 ° in terms of braiding.
【００１５】そこで、本発明はフレックス１の外径より
やや小さい外径を有する、たとえば柔軟な材料からなる
巻芯を用い、組み角４５゜以上であってこれに近い組み
角でブレード２を組み、その巻芯から組んだブレード２
を取り外して、そのフレックス１の外周にそのブレード
２を被嵌するのである。Therefore, the present invention uses a winding core made of, for example, a flexible material having an outer diameter slightly smaller than that of the flex 1, and assembling the blade 2 at an assembling angle of 45 ° or more, which is close to this. , Blade 2 assembled from its core
Then, the blade 2 is fitted on the outer circumference of the flex 1.
【００１６】したがって、ブレード２を織るときにはフ
レックス１より小径の芯材を用いるため、その組み角θ
が４５°近くになり、織り易い。そして、フレックス１
の外周にブレード２を被嵌したときはその組み角θが大
きくなり、ブレード２の密度ρを高め、ブレード２の表
面の凹凸を少なくする。Therefore, when weaving the blade 2, a core material having a diameter smaller than that of the flex 1 is used.
Is close to 45 °, making it easy to weave. And flex 1
When the blade 2 is fitted on the outer periphery of the blade 2, the angle of assembly θ becomes large, the density ρ of the blade 2 is increased, and irregularities on the surface of the blade 2 are reduced.
【００１７】[0017]
【発明の効果】以上説明したように本発明によれば、ブ
レードを織り易くすると共に、ブレードの密度を高め
て、そのブレード表面の凹凸が少なくできる。As described above, according to the present invention, the blade can be easily woven and the density of the blade can be increased to reduce the unevenness of the blade surface.
【図１】内視鏡の可撓管の一部を示す側断面図。FIG. 1 is a side sectional view showing a part of a flexible tube of an endoscope.
【図２】同じくその可撓管のブレードの側面図。FIG. 2 is a side view of the blade of the flexible tube.
【図３】同じくその可撓管のブレードのリード状態を示
す説明図。FIG. 3 is an explanatory view showing a lead state of a blade of the flexible tube.
【図４】ブレードの素線が１リード進むときの関係を展
開して示す説明図。FIG. 4 is an explanatory diagram showing the relationship in which the strand of the blade advances one lead.
【図５】ブレード表面の構成単位の関係を示す説明図。FIG. 5 is an explanatory diagram showing a relationship between constituent units on a blade surface.
１…フレックス、２…ブレード（網管）、３…樹脂製外
皮、４…素線、５…ワイヤ組。1 ... Flex, 2 ... Blade (mesh tube), 3 ... Resin shell, 4 ... Element wire, 5 ... Wire group.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−169535（ＪＰ，Ａ) 特開 昭60−230614（ＪＰ，Ａ) 特開 昭59−186537（ＪＰ，Ａ) 特開 昭62−133925（ＪＰ，Ａ) 特開 昭59−210410（ＪＰ，Ａ) 特開 昭58−19220（ＪＰ，Ａ) 特開 平９−75299（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) A61B 1/00 - 1/32 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-3-169535 (JP, A) JP-A-60-230614 (JP, A) JP-A-59-186537 (JP, A) JP-A-62-1 133925 (JP, A) JP 59-210410 (JP, A) JP 58-19220 (JP, A) JP 9-75299 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) A61B 1/00-1/32
Claims (4)
そのブレードの外周を外皮で被覆する内視鏡用可撓管の
製造方法において、帯状板を螺旋状に巻回したフレック
スに離型剤を塗布する工程と、上記フレックスの外径と
同等より小さい外径を有する巻芯を用い、この巻芯の外
周に組み角４５゜以上でブレードを織り、このブレード
を巻芯から取外して上記フレックスの外周に被嵌するこ
とを特徴とする内視鏡用可撓管の製造方法。1. A blade is fitted around the outer circumference of the flex,
In a method of manufacturing a flexible tube for an endoscope in which the outer periphery of the blade is covered with an outer cover, a step of applying a release agent to a flex in which a strip-shaped plate is spirally wound, and an outer diameter of the flex that is smaller than the same. An endoscope characterized in that a winding core having an outer diameter is used, a blade is woven on the outer periphery of the winding core at an assembly angle of 45 ° or more, and the blade is removed from the winding core and fitted on the outer periphery of the flex. Manufacturing method of flexible tube.
くは金属製のワイヤと樹脂製のワイヤとの混合した糸を
用いて織られた事を特徴とする請求項１に記載の内視鏡
用可撓管の製造方法。2. The endoscope according to claim 1, wherein the blade is woven using a metal wire or a mixed thread of the metal wire and the resin wire. Manufacturing method of flexible tube.
そのブレードの外周を外皮で被覆する内視鏡用可撓管の
製造方法において、帯状板を螺旋状に巻回してフレック
スを作る工程と、上記フレックスの外径と同等より小さ
い外径を有する巻芯を用い、この巻芯の外周に組み角４
５°以上でブレードを織り、このブレードを巻芯から取
外して上記フレックスの外周に被嵌することを特徴とす
る内視鏡用可撓管の製造方法。3. A blade is fitted around the outer circumference of the flex,
In a method for manufacturing an endoscope flexible tube in which the outer circumference of the blade is covered with an outer cover, a step of winding a belt-shaped plate in a spiral shape to form a flex, and a winding having an outer diameter smaller than the outer diameter of the flex. Use a core, and assemble angle 4 on the outer circumference of this core.
A method for manufacturing a flexible tube for an endoscope, comprising weaving a blade at 5 ° or more, removing the blade from the winding core, and fitting the blade onto the outer circumference of the flex.
くは金属製のワイヤと樹脂製のワイヤとの混合した糸を
用いて織られる事を特徴とする請求項３に記載の内視鏡
用可撓管の製造方法。4. The endoscope endoscope according to claim 3, wherein the blade is woven using a metal wire or a thread in which a metal wire and a resin wire are mixed. Flexible tube manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24785999A JP3414677B2 (en) | 1999-09-01 | 1999-09-01 | Method for manufacturing flexible tube for endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24785999A JP3414677B2 (en) | 1999-09-01 | 1999-09-01 | Method for manufacturing flexible tube for endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001070231A JP2001070231A (en) | 2001-03-21 |
| JP3414677B2 true JP3414677B2 (en) | 2003-06-09 |
Family
ID=17169713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24785999A Expired - Fee Related JP3414677B2 (en) | 1999-09-01 | 1999-09-01 | Method for manufacturing flexible tube for endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3414677B2 (en) |
-
1999
- 1999-09-01 JP JP24785999A patent/JP3414677B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001070231A (en) | 2001-03-21 |
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