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JP4148486B2 - Endoscope operation wire - Google Patents
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JP4148486B2 - Endoscope operation wire - Google Patents

Endoscope operation wire Download PDF

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Publication number
JP4148486B2
JP4148486B2 JP32912598A JP32912598A JP4148486B2 JP 4148486 B2 JP4148486 B2 JP 4148486B2 JP 32912598 A JP32912598 A JP 32912598A JP 32912598 A JP32912598 A JP 32912598A JP 4148486 B2 JP4148486 B2 JP 4148486B2
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JP
Japan
Prior art keywords
wire
operation wire
endoscope
wires
twisted
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
Application number
JP32912598A
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Japanese (ja)
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JP2000152911A (en
Inventor
輝雄 大内
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.)
Hoya Corp
Original Assignee
Hoya Corp
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
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Priority to JP32912598A priority Critical patent/JP4148486B2/en
Publication of JP2000152911A publication Critical patent/JP2000152911A/en
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Publication of JP4148486B2 publication Critical patent/JP4148486B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B1/00Constructional features of ropes or cables
    • D07B1/06Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0693Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a strand configuration
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B1/00Constructional features of ropes or cables
    • D07B1/06Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0673Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2201/00Ropes or cables
    • D07B2201/10Rope or cable structures
    • D07B2201/104Rope or cable structures twisted
    • D07B2201/1048Rope or cable structures twisted using regular lay, i.e. the wires or filaments being parallel to rope axis
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2201/00Ropes or cables
    • D07B2201/20Rope or cable components
    • D07B2201/2015Strands
    • D07B2201/2024Strands twisted
    • D07B2201/2025Strands twisted characterised by a value or range of the pitch parameter given
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2205/00Rope or cable materials
    • D07B2205/30Inorganic materials
    • D07B2205/3021Metals
    • D07B2205/3025Steel
    • D07B2205/3028Stainless steel
    • DTEXTILES; PAPER
    • D07ROPES; CABLES OTHER THAN ELECTRIC
    • D07BROPES OR CABLES IN GENERAL
    • D07B2501/00Application field
    • D07B2501/20Application field related to ropes or cables
    • D07B2501/2084Mechanical controls, e.g. door lashes

Landscapes

  • Endoscopes (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Ropes Or Cables (AREA)

Description

【0001】
【発明の属する技術分野】
この発明は、内視鏡の湾曲装置や処置具等において遠隔操作に用いられる内視鏡用操作ワイヤに関する。
【0002】
【従来の技術】
内視鏡用操作ワイヤは一般に、複数のステンレス鋼細線を撚り合わせた撚り線が用いられており、例えば七本の単線を撚り合わせたいわゆる1×7撚りの撚り線等が広く用いられている。
【0003】
【発明が解決しようとする課題】
内視鏡用処置具において、シースの先端に配置された先端処置部材を手元側から軸線周りに任意の角度回転させるような動作ができれば、患部に対する狙撃性が大幅に向上して迅速かつ容易に処置を行うことができる。
【0004】
しかし、上述のような従来の撚り線では、中間部分に回転力がある程度蓄えられてから突然一気に回転するという回転ムラが発生し、回転をスムーズに伝達することができない。
【0005】
また、上述のような従来の撚り線は、牽引あるいは押し込み操作されて強い張力あるいは圧縮力が作用すると、それに伴って回転力が生じる性質がある。そのため、操作ワイヤの先端に連結されている作動部材に対して回転力が作用し、それが操作抵抗となって作動不良を起こす場合がある。
【0006】
そこで本発明は、回転力が滑らかに伝達され、かつ張力の作用によって回転してしまう現象が抑制される、素直な回転特性を有する内視鏡用操作ワイヤを提供することを目的とする。
【0007】
【課題を解決するための手段】
上記の目的を達成するため、本発明の内視鏡用操作ワイヤは、金属細線の単線を複数束ねて撚り合わせて形成された撚り線からなる内視鏡用操作ワイヤにおいて、上記各単線に、あらかじめ上記の撚り方向と逆の回転方向に捩じられることにより生じた残留応力を付与したことを特徴とする。
【0008】
なお、上記残留応力が付与された単線を複数束ねて撚り合わせて形成された撚り線がさらに複数束ねられて、上記撚り方向と逆の回転方向に撚り合わせられた複合撚り線が形成されていてもよい。
【0009】
そして、上記操作ワイヤが、内視鏡の処置具挿通チャンネルに挿通される処置具に用いられていてもよく、上記操作ワイヤが、内視鏡の挿入部の先端近傍に設けられた湾曲部を遠隔操作により屈曲させる湾曲装置に用いられていてもよい。
【0010】
【発明の実施の形態】
図面を参照して本発明の実施の形態を説明する。
図2は、操作ワイヤ10の側面図であり、例えばステンレス鋼細線の単線11を、複数束ねて撚り合わせて形成された撚り線である。
【0011】
図1は、その操作ワイヤ10の軸線と垂直な断面を示しており、軸線位置に真っ直ぐに配置された一本の中心単線11aの周囲に、六本の単線11がスパイラル状に撚り合わせられた、いわゆる1×7撚りの撚り線である。
【0012】
そして、各単線11は、操作ワイヤ10の撚り方向Aと逆の回転方向Bにあらかじめ捩じられて、それにより生じた残留応力が各単線11に付与されている。ただし、中心単線11aには捩じりを与えても与えなくてもよい。
【0013】
このように構成された操作ワイヤ10は、各単線11に加えられている撚り方向の力と、それと逆方向に付与された残留応力とが相殺されることにより、操作ワイヤ10を軸線周りに回転させると回転力が滑らかに伝達され、また牽引あるいは押し込み操作されて強い張力あるいは圧縮力が作用したときには、回転の発生が相当に抑制される。
【0014】
図3は、本発明の第2の実施の形態の操作ワイヤ10の軸線と垂直な断面を略示しており、三本の単線11を撚り合わせて形成された撚り線を、さらに三本撚り合わせて形成された3×3撚りの複合撚り線に本発明を適用したものである。
【0015】
即ち、この操作ワイヤ10においては、三本に束ねて撚り合わせられる各単線11が撚り方向Aと逆の回転方向Bに捩じられて、それにより生じた残留応力が各単線11に付与され、三本を一束にした状態での撚り方向Cは単線11一本毎の撚り方向Aとは逆方向になっている。このように構成することにより、複合撚り線においても第1の実施の形態と同様の作用効果が得られる。
【0016】
図4は、本発明の操作ワイヤ10を内視鏡用生検鉗子に適用した例を示しており、内視鏡の処置具挿通チャンネルに挿脱される可撓性シース21内に軸線方向に進退自在に挿通配置された操作ワイヤ10が、基端側の操作部23で進退操作されることによって、シース21の先端に取り付けられた鉗子カップ22が開閉する。
【0017】
このような生検鉗子に本発明の操作ワイヤ10を用いることにより、鉗子カップ22を開閉させる際には、操作ワイヤ10に回転力が発生することなくスムーズに作動し、操作ワイヤ10を操作部23側で回転させることができるようにすれば、それに追従して鉗子カップ22を任意の向きに回転させることができる。
【0018】
また、図5は本発明の操作ワイヤ10を内視鏡の湾曲操作ワイヤに適用した例を示しており、操作部33に設けられた操作ノブ34を回転操作して操作ワイヤ10を進退操作することにより、挿入部可撓管31の先端に連結された湾曲部32が屈曲する。このような湾曲操作装置に本発明の操作ワイヤ10を用いることにより、湾曲操作をスムーズに行うことができる。
【0019】
なお、本発明の内視鏡用操作ワイヤは上記実施の形態に限定されるものではなく、各種の撚り方をした撚り線及び複合撚り線に適用することができ、また内視鏡各部の操作ワイヤ及び内視鏡用各種処置具の操作ワイヤに適用することができる。
【0020】
【発明の効果】
本発明によれば、撚り線を形成する各単線に、あらかじめ撚り方向と逆の回転方向に捩じられることにより生じた残留応力を付与したことにより、回転力が滑らかに伝達され、かつ張力の作用によって回転してしまう現象が抑制されて素直な回転特性を得ることができる優れた効果を有する。
【図面の簡単な説明】
【図1】本発明の第1の実施の形態の内視鏡用操作ワイヤの軸線と垂直な断面図である。
【図2】本発明の第1の実施の形態の内視鏡用操作ワイヤの側面図である。
【図3】本発明の第2の実施の形態の内視鏡用操作ワイヤの軸線と垂直な断面図である。
【図4】本発明の操作ワイヤを用いた内視鏡用生検鉗子の側面図である。
【図5】本発明の操作ワイヤを用いた内視鏡の側面図である。
【符号の説明】
10 操作ワイヤ
11 単線
A 撚り方向
B 捩じり方向
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope operation wire used for remote operation in an endoscope bending apparatus, treatment tool, or the like.
[0002]
[Prior art]
In general, an operation wire for an endoscope uses a stranded wire formed by twisting a plurality of fine stainless steel wires. For example, a so-called 1 × 7 stranded wire obtained by twisting seven single wires is widely used. .
[0003]
[Problems to be solved by the invention]
In an endoscopic treatment instrument, if the distal end treatment member disposed at the distal end of the sheath can be operated to rotate at an arbitrary angle around the axis from the hand side, the sniping ability to the affected area is greatly improved and can be quickly and easily performed. Treatment can be performed.
[0004]
However, in the conventional stranded wire as described above, the rotation unevenness of suddenly rotating after the rotational force is accumulated to some extent in the intermediate portion occurs, and the rotation cannot be transmitted smoothly.
[0005]
In addition, the conventional stranded wire as described above has a property that when a strong tension or a compressive force is applied by being pulled or pushed, a rotational force is generated accordingly. Therefore, a rotational force acts on the operating member connected to the distal end of the operation wire, which may become an operation resistance and cause a malfunction.
[0006]
In view of the above, an object of the present invention is to provide an endoscope operation wire having a straight rotation characteristic in which a rotational force is smoothly transmitted and a phenomenon in which the rotational force is rotated is suppressed.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the endoscope operation wire of the present invention is an endoscope operation wire formed of a stranded wire formed by bundling a plurality of single wires of metal thin wires, and for each single wire, A residual stress generated by twisting in the rotation direction opposite to the twisting direction is applied in advance.
[0008]
Note that a plurality of stranded wires formed by bundling and twisting a plurality of single wires to which the residual stress is applied are further bundled to form a composite stranded wire twisted in a rotational direction opposite to the twist direction. Also good.
[0009]
And the said operation wire may be used for the treatment tool inserted in the treatment tool insertion channel of an endoscope, The said operation wire is provided with the curved part provided in the front-end | tip vicinity of the insertion part of an endoscope. You may use for the bending apparatus bent by remote operation.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 is a side view of the operation wire 10, for example, a stranded wire formed by bundling a plurality of single wires 11 of stainless steel fine wires.
[0011]
FIG. 1 shows a cross section perpendicular to the axis of the operation wire 10, and six single wires 11 are spirally wound around one central single wire 11 a arranged straight at the axial position. , A so-called 1 × 7 twisted stranded wire.
[0012]
Each single wire 11 is twisted in advance in a rotation direction B opposite to the twisting direction A of the operation wire 10, and the residual stress generated thereby is applied to each single wire 11. However, the central single wire 11a may or may not be twisted.
[0013]
The operation wire 10 thus configured rotates the operation wire 10 around the axis by canceling the twisting force applied to each single wire 11 and the residual stress applied in the opposite direction. Then, the rotational force is transmitted smoothly, and when a strong tension or compressive force is applied by being pulled or pushed in, the occurrence of rotation is considerably suppressed.
[0014]
FIG. 3 schematically shows a cross section perpendicular to the axis of the operation wire 10 according to the second embodiment of the present invention, in which three stranded wires formed by twisting three single wires 11 are further twisted. The present invention is applied to a 3 × 3 twisted composite stranded wire formed in this manner.
[0015]
That is, in this operation wire 10, each single wire 11 bundled and twisted in three is twisted in the rotation direction B opposite to the twist direction A, and the residual stress generated thereby is applied to each single wire 11, The twisting direction C in a state where the three wires are bundled is opposite to the twisting direction A for each single wire 11. By comprising in this way, the effect similar to 1st Embodiment is obtained also in a composite strand.
[0016]
FIG. 4 shows an example in which the operation wire 10 of the present invention is applied to an endoscopic biopsy forceps, and is inserted in the flexible sheath 21 inserted into and removed from the treatment instrument insertion channel of the endoscope in the axial direction. The forceps cup 22 attached to the distal end of the sheath 21 opens and closes when the operation wire 10 inserted and disposed so as to be freely advanced and retracted is advanced and retracted by the operation portion 23 on the proximal end side.
[0017]
By using the operation wire 10 of the present invention for such a biopsy forceps, when the forceps cup 22 is opened and closed, the operation wire 10 operates smoothly without generating a rotational force, and the operation wire 10 is operated by the operation portion. If it can be rotated on the 23 side, the forceps cup 22 can be rotated in an arbitrary direction following the rotation.
[0018]
FIG. 5 shows an example in which the operation wire 10 of the present invention is applied to a bending operation wire of an endoscope. The operation knob 10 provided on the operation unit 33 is rotated to move the operation wire 10 forward and backward. As a result, the bending portion 32 connected to the distal end of the insertion portion flexible tube 31 is bent. By using the operation wire 10 of the present invention in such a bending operation device, the bending operation can be performed smoothly.
[0019]
Note that the endoscope operation wire of the present invention is not limited to the above-described embodiment, and can be applied to various twisted strands and composite strands, and operation of each part of the endoscope The present invention can be applied to wires and operation wires for various treatment tools for endoscopes.
[0020]
【The invention's effect】
According to the present invention, since the residual stress generated by being twisted in the rotational direction opposite to the twisting direction is applied in advance to each single wire forming the stranded wire, the rotational force is transmitted smoothly and the tension The phenomenon of rotating due to the action is suppressed, and an excellent effect is obtained in that a straight rotation characteristic can be obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view perpendicular to the axis of an endoscope operation wire according to a first embodiment of the present invention.
FIG. 2 is a side view of the endoscope operation wire according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view perpendicular to the axis of an endoscope operation wire according to a second embodiment of the present invention.
FIG. 4 is a side view of an endoscopic biopsy forceps using the operation wire of the present invention.
FIG. 5 is a side view of an endoscope using the operation wire of the present invention.
[Explanation of symbols]
10 Operation wire 11 Single wire A Twisting direction B Twisting direction

Claims (4)

金属細線の単線を複数束ねて撚り合わせて形成された撚り線からなる内視鏡用操作ワイヤにおいて、上記各単線に、あらかじめ上記の撚り方向と逆の回転方向に捩じられることにより生じた残留応力を付与したことを特徴とする内視鏡用操作ワイヤ。In an endoscope operation wire made of a twisted wire formed by bundling a plurality of single wires of metal thin wires, the residual generated by being previously twisted in the direction of rotation opposite to the twist direction in each single wire. An operation wire for an endoscope, wherein stress is applied. 上記残留応力が付与された単線を複数束ねて撚り合わせて形成された撚り線がさらに複数束ねられて、上記撚り方向と逆の回転方向に撚り合わせられた複合撚り線が形成されている請求項1記載の内視鏡用操作ワイヤ。A plurality of stranded wires formed by bundling and twisting a plurality of single wires to which the residual stress is applied are further bundled to form a composite stranded wire twisted in a rotational direction opposite to the twist direction. The operation wire for an endoscope according to 1. 上記操作ワイヤが、内視鏡の処置具挿通チャンネルに挿通される処置具に用いられている請求項1又は2記載の内視鏡用操作ワイヤ。The endoscope operation wire according to claim 1 or 2, wherein the operation wire is used in a treatment instrument inserted into a treatment instrument insertion channel of an endoscope. 上記操作ワイヤが、内視鏡の挿入部の先端近傍に設けられた湾曲部を遠隔操作により屈曲させる湾曲装置に用いられている請求項1又は2記載の内視鏡用操作ワイヤ。The operation wire for an endoscope according to claim 1 or 2, wherein the operation wire is used in a bending device that bends a bending portion provided near the distal end of an insertion portion of the endoscope by remote operation.
JP32912598A 1998-11-19 1998-11-19 Endoscope operation wire Expired - Fee Related JP4148486B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32912598A JP4148486B2 (en) 1998-11-19 1998-11-19 Endoscope operation wire

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Application Number Priority Date Filing Date Title
JP32912598A JP4148486B2 (en) 1998-11-19 1998-11-19 Endoscope operation wire

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Publication Number Publication Date
JP2000152911A JP2000152911A (en) 2000-06-06
JP4148486B2 true JP4148486B2 (en) 2008-09-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015011986A1 (en) * 2013-07-25 2015-01-29 日本ライフライン株式会社 Catheter having distal end capable of being deflected by operation

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4399708B2 (en) * 2003-07-04 2010-01-20 富士フイルム株式会社 Endoscope bending operation device
JP4609903B2 (en) * 2008-03-24 2011-01-12 朝日インテック株式会社 Medical guidewire
JP2010207321A (en) * 2009-03-09 2010-09-24 Sumitomo Bakelite Co Ltd Catheter
JP5367518B2 (en) * 2009-09-17 2013-12-11 朝日インテック株式会社 Medical endoscope, method for manufacturing medical endoscope, assembly of medical endoscope and treatment instrument for medical endoscope, and medical endoscope and medical endoscope image processing system
JP6616811B2 (en) * 2017-09-05 2019-12-04 トクセン工業株式会社 Medical device operation rope

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015011986A1 (en) * 2013-07-25 2015-01-29 日本ライフライン株式会社 Catheter having distal end capable of being deflected by operation
JP2015023952A (en) * 2013-07-25 2015-02-05 日本ライフライン株式会社 Tip deflectable catheter

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