JP5266445B2

JP5266445B2 - Endoscope treatment tool manufacturing method

Info

Publication number: JP5266445B2
Application number: JP2008126497A
Authority: JP
Inventors: 誠西村; 幸西村
Original assignee: 株式会社リバーセイコー
Priority date: 2008-04-11
Filing date: 2008-04-11
Publication date: 2013-08-21
Anticipated expiration: 2028-04-11
Also published as: JP2009254761A

Description

本発明は、内視鏡用処置具の製造方法に関する。
The present invention relates to a method of manufacturing the endoscopic treatment tool.

内視鏡用処置具の多くは、操作ワイヤーを通す可撓性シースとして金属線材を巻いてパイプ状に形成されたコイルパイプが用いられ、操作ワイヤーを軸方向に進退操作することにより、可撓性シースの先端側に配置された先端処置部材が動作するように構成されている（例えば、特許文献１、２）。
特開昭６１−２４７４４２号公報特開昭６２−１２２６４４号公報 Many of the endoscope treatment tools use a coiled pipe formed by winding a metal wire as a flexible sheath through which an operation wire is passed, and the operation wire is moved forward and backward in the axial direction to be flexible. The distal treatment member disposed on the distal side of the sexual sheath is configured to operate (for example, Patent Documents 1 and 2).
JP 61-247442 A Japanese Patent Laid-Open No. 62-122644

内視鏡の処置具案内管内に通して使用される内視鏡用処置具は、内視鏡の挿入部が屈曲するとそれと共に屈曲し、小さな曲率半径で曲がりくねった状態になることも珍しくない。すると、コイルパイプ内で進退する操作ワイヤーに大きな摩擦抵抗がかかって動作が渋くなり、作動不良になってしまう場合もある。
そこで、フッ素樹脂等のような潤滑性のある合成樹脂被膜を操作ワイヤーにコーティングすることが考えられて実際に試されている。しかし、操作ワイヤーの端部付近は銀ロー付けや半田付け等の手段で他の部材に強固に連結固着する必要があるので、操作ワイヤーにフッ素樹脂コーティング等を施すと連結強度が不足して耐久性が大幅に低下してしまう場合がある。また、コイルパイプの内面にコーティングを傷める原因がある場合（例えば、コイルパイプが極めて小さな曲率半径で急激に曲げられた場合、或いは複数つなぎ合わされたコイルパイプの継ぎ目の内面にエッジが存在する場合等）には、操作ワイヤーが進退してコイルパイプの内面と擦れ合うことにより、操作ワイヤーに施されているコーティングが長い範囲で破壊されることになり、その後は進退動作が著しく渋くなってしまう場合がある。It is not uncommon for an endoscope treatment tool used by passing through an endoscope treatment tool guide tube to bend with a small curvature radius when the insertion portion of the endoscope is bent. Then, a large frictional resistance is applied to the operation wire that advances and retreats in the coil pipe, and the operation becomes awkward, resulting in malfunction.
Therefore, it has been considered that a synthetic resin film having lubricity such as a fluororesin may be coated on the operation wire. However, since the vicinity of the end of the operation wire must be firmly connected and fixed to other members by means such as silver brazing or soldering, if the operation wire is coated with fluororesin, the connection strength is insufficient and it is durable May be significantly reduced. Also, when there is a cause of damage to the coating on the inner surface of the coil pipe (for example, when the coil pipe is bent suddenly with a very small radius of curvature, or when there is an edge on the inner surface of the seam of the connected coil pipes) ), The operation wire moves forward and backward and rubs against the inner surface of the coil pipe, so that the coating applied to the operation wire is destroyed in a long range, and then the forward and backward movement becomes remarkably awkward. is there.

本発明はそのような問題を解決するためになされたものであり、数々の不具合の原因になる操作ワイヤーへのコーティングをすることなく、コイルパイプ内での操作ワイヤーの摺動抵抗を小さくして作動性を向上させることができ、しかも極めて容易に安定して製造することができる内視鏡用処置具の製造方法を提供することを目的とする。 The present invention has been made to solve such a problem, and reduces the sliding resistance of the operation wire in the coil pipe without coating the operation wire which causes a number of problems. It is an object of the present invention to provide a method of manufacturing an endoscope treatment tool that can improve operability and can be manufactured very easily and stably.

本発明の内視鏡用処置具の製造方法では、操作ワイヤーを通す可撓性シースとして用いるために金属線材を巻いて隙間のないパイプ状に形成された密着巻きコイルパイプを真っ直ぐな状態に保って、潤滑性を有する合成樹脂の溶液を密着巻きコイルパイプ内に注入し、密着巻きコイルパイプ内に溜まった溶液を流出させた後、密着巻きコイルパイプを加熱することにより、密着巻きコイルパイプの内壁面に付着して残っている合成樹脂の被膜を密着巻きコイルパイプの内壁面全体にコーティングする。 In the method for manufacturing an endoscope treatment instrument according to the present invention, a tightly wound coil pipe formed by winding a metal wire material into a pipe shape without a gap for use as a flexible sheath through which an operation wire is passed is maintained in a straight state. Then, after injecting a solution of synthetic resin having lubricity into the close-coiled coil pipe and draining the solution accumulated in the close-coiled coil pipe, the close-coiled coil pipe is heated. A synthetic resin film remaining on the inner wall surface is coated on the entire inner wall surface of the closely wound coil pipe.

なお、密着巻きコイルパイプを真っ直ぐな状態に保つために、密着巻きコイルパイプが真っ直ぐなパイプ内に通されてもよく、密着巻きコイルパイプ内から合成樹脂の溶液を重力で流出させるために、密着巻きコイルパイプが垂直に保持されてもよい。また、密着巻きコイルパイプを加熱する工程で、合成樹脂の溶液中の溶剤が蒸散されてもよい。 In order to keep the tightly wound coil pipe straight, the tightly wound coil pipe may be passed through the straight pipe, and in order to allow the synthetic resin solution to flow out by gravity from the tightly wound coil pipe, The wound coil pipe may be held vertically. Moreover, the solvent in the synthetic resin solution may be evaporated in the step of heating the tightly wound coil pipe.

また、密着巻きコイルパイプとしてコイル径又は素線径が相違する複数の密着巻きコイルパイプが直列に接続されて、複数の密着巻きコイルパイプの内壁面全体に合成樹脂被膜がコーティングされてもよく、密着巻きコイルパイプの内壁面全体に合成樹脂被膜がコーティングされた後に、密着巻きコイルパイプが部分的又は全体的に軸方向に引き伸ばされて粗巻きコイルパイプにされてもよい。また、合成樹脂の被膜が内壁面全体にコーティングされた密着巻きコイルパイプと、合成樹脂の被膜が内壁面にコーティングされていないコイルパイプとを、直列に接続してもよい。
Further, a plurality of closely wound coil pipes having different coil diameters or wire diameters as the closely wound coil pipes are connected in series, and the entire inner wall surface of the plurality of closely wound coil pipes may be coated with a synthetic resin coating, After the synthetic resin film is coated on the entire inner wall surface of the tightly wound coil pipe, the tightly wound coil pipe may be partially or entirely stretched in the axial direction to form a coarsely wound coil pipe. Further, a tightly wound coil pipe in which a synthetic resin coating is coated on the entire inner wall surface and a coil pipe in which a synthetic resin coating is not coated on the inner wall surface may be connected in series.

本発明の内視鏡用処置具の製造方法によれば、可撓性シースとして用いられるコイルパイプの内壁面全体に潤滑性のある合成樹脂被膜をコーティングしたことにより、数々の不具合の原因になる操作ワイヤーへのコーティングをすることなく、コイルパイプ内での操作ワイヤーの摺動抵抗を小さくして作動性を向上させることができ、しかも極めて容易に安定して製造することができる。 According to the method for manufacturing an endoscope treatment tool of the present invention, a synthetic resin film having lubricity is coated on the entire inner wall surface of a coil pipe used as a flexible sheath, which causes numerous problems. Without coating the operation wire, the sliding resistance of the operation wire in the coil pipe can be reduced to improve the operability, and it can be manufactured very easily and stably.

以下、図面を参照して本発明の実施の形態を具体的に説明する。
図２は、内視鏡の処置具案内管内に通して使用される内視鏡用処置具の一つである内視鏡用鋏具の先端付近を示している。ただし、本発明は各種の内視鏡用処置具に適用することができる。
１は、ステンレス線等のような金属線材を隙間なく密着巻きしてパイプ状に形成されたコイルパイプであり、内視鏡の処置具案内管に挿脱される可撓性シースとして用いられている。ただし、コイルパイプ１の外面に電気絶縁性の可撓性チューブ等が被覆されていてもよい。コイルパイプ１の外径は０．５〜２．５ｍｍ程度、全長は１．５〜２ｍ程度である。コイルパイプ１内には、ステンレス細線材を撚って形成されたロープ状の操作ワイヤー２が軸方向に進退自在に通されている。Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 2 shows the vicinity of the distal end of an endoscope tool that is one of the endoscope treatment tools used by passing through the endoscope treatment tool guide tube. However, the present invention can be applied to various types of endoscope treatment tools.
Reference numeral 1 denotes a coil pipe formed into a pipe shape by tightly winding a metal wire material such as a stainless steel wire, and is used as a flexible sheath that is inserted into and removed from a treatment instrument guide tube of an endoscope. Yes. However, the outer surface of the coil pipe 1 may be covered with an electrically insulating flexible tube or the like. The outer diameter of the coil pipe 1 is about 0.5 to 2.5 mm, and the total length is about 1.5 to 2 m. A rope-like operation wire 2 formed by twisting a thin stainless steel wire is passed through the coil pipe 1 so as to freely advance and retract in the axial direction.

コイルパイプ１の先端に連結された支持本体３には、先端処置部材４である一対の鋏片が、前方に向かって開閉自在なように支軸５に回動自在に支持されている。６は、先端処置部材４を開閉駆動するためのリンク機構であり、その後端に配置された連結リンク７に操作ワイヤー２の先端が差し込まれて、銀ロー付け等でそこに連結固着されている。したがって、コイルパイプ１の後端に連結された操作部（図示せず）から操作ワイヤー２を進退操作することにより、リンク機構６が駆動されて先端処置部材４が開閉動作をする。 A pair of hooks, which are tip treatment members 4, are rotatably supported on the support shaft 5 so as to be openable and closable on the support body 3 connected to the tip of the coil pipe 1. Reference numeral 6 denotes a link mechanism for opening and closing the distal treatment member 4. The distal end of the operation wire 2 is inserted into a connection link 7 disposed at the rear end thereof, and is connected and fixed thereto by silver brazing or the like. . Therefore, when the operation wire 2 is moved forward and backward from an operation portion (not shown) connected to the rear end of the coil pipe 1, the link mechanism 6 is driven and the distal treatment member 4 opens and closes.

支持本体３はコイルパイプ１の先端に直結されておらず、コイルパイプ１の先端に銀ロー付け又は溶接等で固着された連結環８と支持本体３とが、軸周りに回転自在に且つ軸方向には移動しないように連結されている。ただし、コイルパイプ１の先端に支持本体３が直接連結されたものであってもよい。なお、この内視鏡用処置具が、操作ワイヤー２やコイルパイプ１等を経由して先端処置部材４に高周波電流を流すことができる高周波処置具であってもよい。 The support body 3 is not directly connected to the tip of the coil pipe 1, and the connecting ring 8 fixed to the tip of the coil pipe 1 by silver brazing or welding and the support body 3 are rotatable around the axis and It is connected so as not to move in the direction. However, the support body 3 may be directly connected to the tip of the coil pipe 1. The endoscopic treatment instrument may be a high-frequency treatment instrument that can cause a high-frequency current to flow through the distal treatment member 4 via the operation wire 2, the coil pipe 1, or the like.

コイルパイプ１の内壁面全体には、図１に拡大図示されるように、フッ素樹脂等のような潤滑性のある合成樹脂被膜９がコーティングされている。ただし、コイルパイプ１の外面にはそのような合成樹脂被膜９の類はコーティングされていない。したがって、コイルパイプ１の先端に連結環８等を強固に連結固着することができる。また、操作ワイヤー２の外面にもそのような合成樹脂被膜９の類はコーティングされていない。したがって、操作ワイヤー２の先端に連結リンク７等を強固に連結固着することができる。 As shown in an enlarged view in FIG. 1, the entire inner wall surface of the coil pipe 1 is coated with a synthetic resin film 9 having lubricity such as a fluororesin. However, the synthetic resin film 9 is not coated on the outer surface of the coil pipe 1. Therefore, the connecting ring 8 or the like can be firmly connected and fixed to the tip of the coil pipe 1. Further, the synthetic resin film 9 is not coated on the outer surface of the operation wire 2. Therefore, the connecting link 7 or the like can be firmly connected and fixed to the tip of the operation wire 2.

なお、コイルパイプ１としてコイル径又は素線径が相違する複数のコイルパイプが直列に接続されていて、その一部又は全部のコイルパイプの内壁面全体に合成樹脂被膜９がコーティングされていてもよく、コイルパイプ１が密着巻きではなくて素線間に隙間のあるものでもよい。また、コイルパイプ１の素線の断面形状が円形状、矩形状、偏平形状又はＤ形状等であっても差し支えない。そして、本発明が適用される内視鏡用処置具は、図３に示される内視鏡用異物回収バスケットや内視鏡用高周波スネア等のように、操作ワイヤー２の先端に先端処置部材４′が直結されたものであってもよく、金属線材からなるコイルパイプ１が可撓性シースに用いられて、そのコイルパイプ１内に操作ワイヤー２が通された構成のものであれば、どのような種類の内視鏡用処置具であってもよい。 Note that a plurality of coil pipes having different coil diameters or wire diameters are connected in series as the coil pipe 1, and a synthetic resin coating 9 is coated on the entire inner wall surface of a part or all of the coil pipes. The coil pipe 1 may not be tightly wound but may have a gap between the strands. Further, the cross-sectional shape of the wire of the coil pipe 1 may be a circular shape, a rectangular shape, a flat shape, a D shape, or the like. The endoscope treatment tool to which the present invention is applied is a distal treatment member 4 at the distal end of the operation wire 2, such as an endoscope foreign matter collection basket and an endoscope high-frequency snare shown in FIG. ′ May be directly connected, and any coil pipe 1 made of a metal wire may be used for the flexible sheath and the operation wire 2 may be passed through the coil pipe 1. Such a kind of endoscope treatment tool may be used.

図４〜図６は、コイルパイプ１の内壁面に合成樹脂被膜９をコーティングする製造工程の一例を示している。この例では、まず図４に示されるように、素線間に隙間のない密着巻きのコイルパイプ１の一端側に、例えばルアーロック形式の注射針口金状に形成された注入口金１１を取り付ける。その取り付け状態を固定する手段は、コイルパイプ１の一端内への機械的圧入で済む場合にはそれだけでもよいが、半田付け等で固定してもよく、コイルパイプ１のその端部付近の領域Ｙは後の工程で切断すればよい。 4 to 6 show an example of a manufacturing process for coating the inner wall surface of the coil pipe 1 with the synthetic resin film 9. In this example, first, as shown in FIG. 4, an injection cap 11 formed in the shape of a luer lock type injection needle cap, for example, is attached to one end of a tightly wound coil pipe 1 with no gap between the strands. The means for fixing the attachment state may be only when mechanical press-fitting into one end of the coil pipe 1 is sufficient, but it may be fixed by soldering or the like, and an area near the end of the coil pipe 1. Y may be cut in a later step.

そして、密着巻きのコイルパイプ１であっても真っ直ぐの状態でないと素線間に隙間ができるので、図５に示されるように、真っ直ぐな硬質パイプ１２内にコイルパイプ１を緩く嵌挿して、コイルパイプ１を素線間に隙間のない真っ直ぐな状態に保ち、例えばフッ素樹脂等のような潤滑性を有する合成樹脂が溶剤で溶かされた溶液を注入口金１１からコイルパイプ１内に注入する。注入口金１１が取り付けられていない側のコイルパイプ１の端部は、硬質パイプ１２から頭を出す状態にしておく。そうすることより、コイルパイプ１内から排出される合成樹脂の溶液が硬質パイプ１２に付着しない。 And even if the coil pipe 1 is tightly wound, there is a gap between the wires unless it is in a straight state, so as shown in FIG. 5, the coil pipe 1 is loosely inserted into the straight hard pipe 12, The coil pipe 1 is kept in a straight state with no gap between the strands, and a solution in which a synthetic resin having lubricity such as a fluororesin is dissolved in a solvent is injected into the coil pipe 1 from the inlet 11. The end portion of the coil pipe 1 on the side where the inlet metal 11 is not attached is in a state of protruding from the hard pipe 12. By doing so, the synthetic resin solution discharged from the coil pipe 1 does not adhere to the hard pipe 12.

次いで図６に示されるように、コイルパイプ１を垂直に保持して、コイルパイプ１内に溜まった合成樹脂の溶液を重力で下方に流出させた後、コイルパイプ１を適宜の温度に加熱することにより、コイルパイプ１の内壁面に付着して残っている合成樹脂の溶液中から溶剤が気化して蒸散し、コイルパイプ１の内壁面全体に合成樹脂被膜９がコーティングされた状態になる。コイルパイプ１の外壁面には合成樹脂被膜９は全くコーティングされない。最後に、コイルパイプ１の両端部分を切断して内視鏡用処置具の可撓性シースとして使用する。なお、内面コーティングが完了した後に、コイルパイプ１を全体的にランダムな向きに強制的に屈曲させることにより、コイルパイプ１内に一つながりにコーティングされている合成樹脂被膜９がコイルパイプ１の素線間で分断されて、コイルパイプ１が柔軟に屈曲する状態になる。 Next, as shown in FIG. 6, after the coil pipe 1 is held vertically and the synthetic resin solution accumulated in the coil pipe 1 is caused to flow downward by gravity, the coil pipe 1 is heated to an appropriate temperature. As a result, the solvent evaporates from the synthetic resin solution remaining on the inner wall surface of the coil pipe 1 and evaporates, and the entire inner wall surface of the coil pipe 1 is coated with the synthetic resin film 9. The outer wall surface of the coil pipe 1 is not coated with the synthetic resin film 9 at all. Finally, both end portions of the coil pipe 1 are cut and used as a flexible sheath of the endoscope treatment tool. Note that after the inner surface coating is completed, the coil pipe 1 is forcibly bent in a random direction as a whole, so that the synthetic resin coating 9 that is coated in a continuous manner in the coil pipe 1 becomes the raw material of the coil pipe 1. The coil pipe 1 is flexibly bent by being divided between the lines.

図７に示されるように、コイルパイプ１としてコイル径又は素線径が相違する複数の密着巻きのコイルパイプ１Ａ，１Ｂが直列に接続されている場合にも、前述と同様の工程により、複数の密着巻きのコイルパイプ１の内壁面全体に合成樹脂被膜９をコーティングすることができる。また、可撓性シースとして、本発明の製造方法で合成樹脂被膜９が内壁面全体にコーティングされたコイルパイプ１と、合成樹脂被膜９が内壁面にコーティングされていないコイルパイプとを、直列に接続して用いてもよい。 As shown in FIG. 7, even when a plurality of closely wound coil pipes 1A and 1B having different coil diameters or wire diameters are connected in series as the coil pipe 1, a plurality of coil pipes 1A and 1B are connected in series by the same process as described above. The synthetic resin film 9 can be coated on the entire inner wall surface of the closely wound coil pipe 1. Further, as the flexible sheath, the coil pipe 1 in which the synthetic resin film 9 is coated on the entire inner wall surface by the manufacturing method of the present invention and the coil pipe in which the synthetic resin film 9 is not coated on the inner wall surface are connected in series. You may connect and use.

また、可撓性シースとして粗巻きのコイルパイプを用いる場合には、図４〜図６に示された工程で内壁面全体に合成樹脂被膜９がコーティングされた密着巻きのコイルパイプ１を、図８に示されるように、コーティングが完了した後の工程で部分的又は全体に軸方向に引き伸ばして粗巻きのコイルパイプ１′にすればよい。 Further, when a coarsely wound coil pipe is used as the flexible sheath, the tightly wound coil pipe 1 in which the entire inner wall surface is coated with the synthetic resin film 9 in the steps shown in FIGS. As shown in FIG. 8, in the step after the coating is completed, the coil pipe 1 'may be a coarsely wound coil by partially or entirely extending in the axial direction.

本発明の実施の形態の内視鏡用処置具の可撓性シース部分の拡大断面図。The expanded sectional view of the flexible sheath part of the treatment tool for endoscopes of embodiment of this invention. 本発明が適用された内視鏡用処置具の先端付近の側面断面図。Side surface sectional drawing of the front-end | tip vicinity of the treatment tool for endoscopes to which this invention was applied. 本発明が適用された内視鏡用異物回収バスケットの側面断面図。Side surface sectional drawing of the foreign material collection | recovery basket for endoscopes to which this invention was applied. 本発明の実施の形態の内視鏡用処置具の製造工程の断面図。Sectional drawing of the manufacturing process of the treatment tool for endoscopes of embodiment of this invention. 本発明の実施の形態の内視鏡用処置具の製造工程の断面図。Sectional drawing of the manufacturing process of the treatment tool for endoscopes of embodiment of this invention. 本発明の実施の形態の内視鏡用処置具の製造工程の断面図。Sectional drawing of the manufacturing process of the treatment tool for endoscopes of embodiment of this invention. 本発明の実施の形態の内視鏡用処置具の変形例の製造工程の断面図。Sectional drawing of the manufacturing process of the modification of the treatment tool for endoscopes of embodiment of this invention. 本発明の実施の形態の内視鏡用処置具の第２の変形例の製造工程の断面図。Sectional drawing of the manufacturing process of the 2nd modification of the treatment tool for endoscopes of embodiment of this invention.

Explanation of symbols

１，１Ａ，１Ｂ…コイルパイプ
１′…粗巻きのコイルパイプ
２…操作ワイヤー
４，４′…先端処置部材
９…合成樹脂被膜
１１…注入口金
１２…硬質パイプDESCRIPTION OF SYMBOLS 1,1A, 1B ... Coil pipe 1 '... Coarse coil pipe 2 ... Operation wire 4, 4' ... Tip treatment member 9 ... Synthetic resin film 11 ... Filler 12 ... Hard pipe

Claims

In order to use as a flexible sheath through which an operation wire is passed, a tightly wound coiled pipe formed by winding a metal wire and forming a pipe with no gaps is kept straight, and a solution of a synthetic resin having lubricity is wound on the tightly wound coil pipe. After pouring into the coil pipe and draining the solution accumulated in the tightly wound coil pipe, by heating the tightly wound coil pipe, it remains attached to the inner wall surface of the tightly wound coil pipe A method for manufacturing an endoscope treatment instrument, wherein the synthetic resin coating is coated on the entire inner wall surface of the tightly wound coil pipe.

The endoscope treatment tool manufacturing method according to claim 1 , wherein the tightly wound coil pipe is passed through a straight pipe in order to keep the tightly wound coil pipe in a straight state. A method for manufacturing a treatment tool.

3. The method of manufacturing an endoscopic treatment instrument according to claim 1 , wherein the tightly wound coil pipe is held vertically in order to cause the synthetic resin solution to flow out of the tightly wound coil pipe by gravity. The manufacturing method of the treatment tool for endoscopes.

The method for manufacturing an endoscope treatment tool according to any one of claims 1 to 3 , wherein the solvent in the synthetic resin solution is evaporated in the step of heating the tightly wound coil pipe. A method for manufacturing a treatment tool.

5. The method for manufacturing an endoscope treatment instrument according to claim 1 , wherein a plurality of closely wound coil pipes having different coil diameters or wire diameters are connected in series as the closely wound coil pipe. The manufacturing method of the treatment tool for endoscopes in which the synthetic resin film is coated on the entire inner wall surface of the plurality of closely wound coil pipes.

6. The method for manufacturing an endoscopic treatment instrument according to claim 1, wherein after the synthetic resin coating is coated on the entire inner wall surface of the tightly wound coil pipe, the tightly wound coil pipe is partially Of a treatment instrument for an endoscope which is stretched axially or entirely in the axial direction to be a coarsely wound coil pipe .

7. The method of manufacturing an endoscope treatment instrument according to claim 1, wherein the synthetic resin film is coated on the entire inner wall surface, and the synthetic resin film is formed on the inner wall surface. A method for manufacturing an endoscope treatment instrument in which a coil pipe that is not coated is connected in series .