JPH11313834A - Forceps - Google Patents

Abstract

PROBLEM TO BE SOLVED: To curve an optional position of an insert part so as to make a forceps part at a tip part easily approach an objective part. SOLUTION: In forceps comprising an operating part 1 and an insert part 2 disposed at the operating part 1 and having a forceps part 9 at the tip, the insert part 2 comprises a plurality of moving pieces 20 placed almost on a straight line at the time of being axially connected to each other while forming the void part into a curved part 8 at the time of being separated, and curved operating wires 23 axially piercing the peripheral edge parts of these moving pieces 20 and curving the curved part 8 by push-pull operation with one end parts connected to the tip side of the insert part 2 and with the other end parts connected to the operating part 1.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、例えば内視鏡下
外科手術に使用し、組織を把持するための鉗子に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to forceps for grasping tissue, for example, for use in endoscopic surgery.

【０００２】[0002]

【従来の技術】内視鏡下外科手術に使用し、組織を把持
したり、切開するための鉗子として、例えば特開平８−
３３６４４号公報及び特開平９−２６２２３９号公報が
知られている。特開平８−３３６４４号公報の鉗子は、
先端部に開閉自在な鉗子部を有した挿入部と、挿入部の
基端部に設けられた操作部と、この操作部の操作によっ
て前記鉗子部を開閉する駆動部材とから構成されてい
る。また、挿入部には湾曲部が設けられている。2. Description of the Related Art As forceps for grasping or incising tissue, which is used in endoscopic surgery, for example, as disclosed in
JP-A-33644 and JP-A-9-262239 are known. The forceps disclosed in JP-A-8-33644 is
It comprises an insertion portion having a forceps portion that can be opened and closed at a distal end portion, an operation portion provided at a base end portion of the insertion portion, and a driving member that opens and closes the forceps portion by operating the operation portion. Further, a bending portion is provided in the insertion portion.

【０００３】また、特開平９−２６２２３９号公報の鉗
子は、先端部に開閉自在な鉗子部を有した挿入部と、挿
入部の基端部に設けられた操作部と、この操作部の操作
によって前記鉗子部を開閉する駆動部材とから構成され
ている。また、挿入部にはアングルリングからなる湾曲
部が設けられ、操作部の操作によって湾曲部を任意の方
向に湾曲できるようになっている。The forceps disclosed in Japanese Patent Application Laid-Open No. 9-262239 has an insertion section having a freely openable and closed forceps section at a distal end, an operation section provided at a base end of the insertion section, and an operation section of the operation section. And a drive member for opening and closing the forceps section. The insertion section is provided with a bending section formed of an angle ring, and the bending section can be bent in an arbitrary direction by operating the operation section.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、前述の
ように構成された鉗子は、いずれも挿入部に湾曲部が設
けられているが、湾曲位置が挿入部の長手方向の一定の
位置にあり、挿入部の先端近傍を湾曲したり、手元側近
傍を湾曲することは不可能である。However, in the forceps constructed as described above, the bending portion is provided in the insertion portion, but the bending position is at a fixed position in the longitudinal direction of the insertion portion. It is impossible to curve the vicinity of the distal end of the insertion portion or the vicinity of the hand side.

【０００５】したがって、例えば、鉗子部によって腹膜
等の対象物を把持したり、切開しようとしても対象物に
対して鉗子部を容易にアプローチできなかったり、対象
物を確実に把持したり、切開できない。つまり、別な把
持鉗子を用いて対象物を把持して手前側に引っ張った状
態で鉗子部によって切開するという面倒な術が必要とな
る。Therefore, for example, even if an object such as the peritoneum is grasped or incised by the forceps portion, the forceps portion cannot be easily approached to the object, or the object cannot be securely grasped or incised. . In other words, it is necessary to perform a troublesome operation in which the target is grasped using another grasping forceps and incised by the forceps portion in a state of being pulled toward the near side.

【０００６】この発明は、前記事情に着目してなされた
もので、その目的とするところは、挿入部の長手方向の
任意の位置を湾曲することができ、操作性に優れた鉗子
を提供することにある。The present invention has been made in view of the above circumstances, and an object thereof is to provide a forceps which can bend any position in the longitudinal direction of an insertion portion and has excellent operability. It is in.

【０００７】[0007]

【課題を解決するための手段】この発明は、前記目的を
達成するために、操作部と、この操作部に設けられ先端
に鉗子部を有する挿入部とからなる鉗子において、前記
挿入部は、互いに軸方向に連結したとき略直線上とな
り、切離したときその空隙部が湾曲部となる複数の短筒
状部材と、これら短筒状部材の周縁部を軸方向に貫通
し、一端部が前記挿入部の先端側に接続され他端部が前
記操作部に接続され押し引き操作して前記湾曲部を湾曲
する湾曲操作ワイヤとからなることを特徴とする。前述
した構成によれば、短筒状部材を軸方向に移動して空隙
部の位置を選択することにより、挿入部の任意の位置を
湾曲させることができる。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a forceps comprising an operating section and an inserting section provided on the operating section and having a forceps section at a tip thereof, wherein the inserting section comprises: A plurality of short cylindrical members that become substantially straight when connected to each other in the axial direction, and whose gaps become curved when separated, and penetrate in the axial direction the peripheral edge of these short cylindrical members, and one end is A bending operation wire is connected to the distal end side of the insertion portion and the other end is connected to the operation portion, and is operated by pushing and pulling to bend the bending portion. According to the above-described configuration, an arbitrary position of the insertion portion can be bent by moving the short cylindrical member in the axial direction and selecting the position of the gap.

【０００８】[0008]

【発明の実施の形態】以下、この発明の実施の形態を図
面に基づいて説明する。図１〜図６は第１の実施形態を
示し、図１は鉗子の全体構成を示し、操作部１と挿入部
２とから構成されている。操作部１の本体１ａには固定
ハンドル３が一体に設けられ、この固定ハンドル３には
枢軸４によって可動ハンドル５が回動自在に設けられて
いる。また、本体１ａの側部には湾曲操作ノブ６が設け
られている。Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 6 show the first embodiment, and FIG. 1 shows the entire configuration of the forceps, which is composed of an operation unit 1 and an insertion unit 2. A fixed handle 3 is provided integrally with the main body 1 a of the operation unit 1, and a movable handle 5 is rotatably provided on the fixed handle 3 by a pivot 4. A bending operation knob 6 is provided on a side of the main body 1a.

【０００９】前記挿入部２には、操作部１の本体１ａに
固定された剛性を有するシース部７を有し、このシース
部７の先端部には湾曲部８を介して鉗子部９が設けられ
ている。鉗子部９は、図２に示すように、枢軸１０を支
点として回動自在に枢支された一対の鉗子部材１１から
なり、一対の鉗子部材１１の基端部は連結ピン１２を介
してリンク１３に連結され、これらリンク１３は連結ピ
ン１４を介して駆動部材１５の先端部に連結されてい
る。The insertion section 2 has a rigid sheath 7 fixed to the main body 1a of the operation section 1, and a forceps section 9 is provided at a distal end of the sheath 7 via a curved section 8. Have been. As shown in FIG. 2, the forceps section 9 includes a pair of forceps members 11 pivotally supported on a pivot 10 as a fulcrum, and the base ends of the pair of forceps members 11 are linked via connection pins 12. The link 13 is connected to a distal end of a driving member 15 via a connecting pin 14.

【００１０】駆動部材１５は円筒状で、外周面に絶縁被
覆１７を有した保持部材１６の内部に進退自在に挿入さ
れ、前進によってリンク１３を介して鉗子部材１１が枢
軸１０を支点として開き、後退によって鉗子部材１１が
閉じるようになっている。また、駆動部材１５には超弾
性操作ワイヤからなる操作ロッド１８が接続されてお
り、この操作ロッド１８は前記湾曲部８及びシース部７
を貫通して操作部１の本体１ａの内部まで導かれてい
る。そして、本体１ａの内部に進退自在に支持された連
結部材１９に連結され、この連結部材１９の後端は前記
可動ハンドル５の操作部５ａと当接している。The driving member 15 is cylindrical and is inserted into a holding member 16 having an insulating coating 17 on the outer peripheral surface so as to be able to advance and retreat. The forceps member 11 is closed by retreating. An operation rod 18 made of a superelastic operation wire is connected to the driving member 15. The operation rod 18 is connected to the bending portion 8 and the sheath portion 7.
To the inside of the main body 1a of the operation unit 1. The movable member 5 is connected to a connecting member 19 supported inside the main body 1a so as to be movable forward and backward.

【００１１】また、前記湾曲部８は、図３および図４に
示すように、複数個の短筒状部材としての移動駒２０を
軸方向に直列に連設することにより構成されている。移
動駒２０は、円筒状で、その軸方向の中間部より一端側
が大径部に２１ａに、他端側が小径部２１ｂに形成さ
れ、大径部２１ａの内径、つまり拡径部２１ｃは前記小
径部２１ｂに密に嵌合可能に形成されている。さらに、
小径部２１ｂの中心部には前記操作ロッド１８が貫通す
る貫通孔２２が設けられ、この貫通孔２２を挟んで上下
または左右の移動駒２０の周縁部には後述する湾曲操作
ワイヤ２３が挿通する挿通孔２４が設けられている。As shown in FIGS. 3 and 4, the bending portion 8 is constituted by connecting a plurality of moving pieces 20 as short cylindrical members in series in the axial direction. The moving piece 20 has a cylindrical shape, one end of which is formed in a large diameter portion 21a and the other end of which is formed in a small diameter portion 21b from an intermediate portion in the axial direction. It is formed so as to be able to fit tightly into the portion 21b. further,
A through hole 22 through which the operation rod 18 penetrates is provided at the center of the small diameter portion 21b, and a bending operation wire 23 to be described later is inserted through the perimeter of the vertically or horizontally movable piece 20 with the through hole 22 interposed therebetween. An insertion hole 24 is provided.

【００１２】そして、前記複数個の移動駒２０は小径部
２１ｂに大径部２１ａの拡径部２１ｃを嵌合することに
より軸方向に連結されるが、シース部７の先端と鉗子部
９の保持部材１６の後端との間の間隔Ａよりも連結され
た移動駒２０の連結長は短く、連結された移動駒２０相
互間に湾曲部分となる空隙部２０ａが形成されるように
なっている。The plurality of movable pieces 20 are connected in the axial direction by fitting the enlarged diameter portion 21c of the large diameter portion 21a into the small diameter portion 21b. The connection length of the connected moving pieces 20 is shorter than the distance A between the rear end of the holding member 16 and the gap 20a that becomes a curved portion is formed between the connected moving pieces 20. I have.

【００１３】さらに、連結された複数個の移動駒２０の
一対の挿通孔２２には超弾性合金からなる湾曲操作ワイ
ヤ２３が挿通されている。これら湾曲操作ワイヤ２３の
先端部は最前端の移動駒２０を貫通して突出し、その突
出部には球状のストッパ２３ａが設けられ、このストッ
パ２３ａは保持部材１６に設けられた操作ワイヤ固定部
２５に固定されている。Further, a bending operation wire 23 made of a superelastic alloy is inserted through a pair of insertion holes 22 of the plurality of connected moving pieces 20. The distal ends of these bending operation wires 23 penetrate through the frontmost moving piece 20 and protrude therefrom. A spherical stopper 23 a is provided at the protruding portion, and the stopper 23 a is an operation wire fixing portion 25 provided on the holding member 16. It is fixed to.

【００１４】湾曲操作ワイヤ２３の基端側はシース部７
を貫通して操作部１の本体１ａまで導かれ、基端部には
太鼓状の端末部材２６が固着されている。一方、前記湾
曲操作ノブ６の回転軸２７には湾曲滑車２８が嵌着さ
れ、この湾曲滑車２８の外周部の１８０゜離れた位置に
は前記端末部材２６が係合される切欠部２９が設けられ
ている。そして、湾曲操作ノブ６を回転させることによ
り、回転軸２７を介して湾曲滑車２８が回転し、この湾
曲滑車２８の外周部に連結された２本の湾曲操作ワイヤ
２３の一方が引っ張られ、他方が押し戻されて湾曲部８
を湾曲できるようになっている。The proximal end of the bending operation wire 23 is the sheath 7
Is penetrated to the main body 1a of the operation unit 1, and a drum-shaped terminal member 26 is fixed to the base end. On the other hand, a curved pulley 28 is fitted on the rotation shaft 27 of the bending operation knob 6, and a cutout portion 29 with which the terminal member 26 is engaged is provided at a position 180 ° away from the outer peripheral portion of the curved pulley 28. Have been. Then, by rotating the bending operation knob 6, the bending pulley 28 rotates via the rotation shaft 27, and one of the two bending operation wires 23 connected to the outer peripheral portion of the bending pulley 28 is pulled, and the other. Is pushed back and the curved portion 8
Can be curved.

【００１５】次に、第１の実施形態の作用について説明
する。本実施形態においては、挿入部２に８個の移動駒
２０を連設した場合であり、図５は、先端側に４個の移
動駒２０を連結し、基端側に４個の移動駒２０を連結し
て中間に空隙部２０ａを形成した状態を示す。Next, the operation of the first embodiment will be described. In this embodiment, eight moving pieces 20 are connected to the insertion portion 2. FIG. 5 shows four moving pieces 20 connected to the distal end side and four moving pieces 20 connected to the base end side. 20 shows a state in which the gaps 20a are formed in the middle by connecting the gaps 20.

【００１６】この状態で、鉗子を経内視鏡的に体腔内に
挿入し、操作部１の湾曲操作ノブ６を時計回りに（角度
θ）回転させると、回転軸２７を介して湾曲滑車２８が
同方向に回転し、この湾曲滑車２８の外周部に連結され
た２本の湾曲操作ワイヤ２３のうち、上側の湾曲操作ワ
イヤ２３が引っ張られ、下側の湾曲操作ワイヤ２３が押
し戻されて湾曲部８の中間部の空隙部２０ａが上側に湾
曲する。In this state, when the forceps is inserted into the body cavity transendoscopically and the bending operation knob 6 of the operation unit 1 is rotated clockwise (angle θ), the bending pulley 28 is rotated via the rotation shaft 27. Rotate in the same direction, of the two bending operation wires 23 connected to the outer periphery of the bending pulley 28, the upper bending operation wire 23 is pulled, and the lower bending operation wire 23 is pushed back to bend. The space 20a in the middle of the part 8 is curved upward.

【００１７】図６は、先端側は１個の移動駒２０とし、
基端側に７個の移動駒２０を連結して先端側に空隙部２
０ａを形成した状態を示す。この状態で、鉗子を経内視
鏡的に体腔内に挿入し、操作部１の湾曲操作ノブ６を時
計回りに回転させると、回転軸２７を介して湾曲滑車２
８が同方向に回転し、この湾曲滑車２８の外周部に連結
された２本の湾曲操作ワイヤ２３のうち、上側の湾曲操
作ワイヤ２３が引っ張られ、下側の湾曲操作ワイヤ２３
が押し戻されて湾曲部８の先端側の空隙部２０ａが上側
に湾曲する。したがって、鉗子を体腔内に挿入する前に
移動駒２０を前後方向に移動して空隙部２０ａからなる
湾曲位置を選択することができ、鉗子部９を体腔内の目
的部位にアプローチできる。FIG. 6 shows one moving piece 20 at the tip end,
Seven moving pieces 20 are connected to the base end side and a gap 2 is formed at the front end side.
0a is shown. In this state, the forceps is inserted endoscopically into the body cavity, and the bending operation knob 6 of the operation unit 1 is rotated clockwise.
8 rotates in the same direction, and of the two bending operation wires 23 connected to the outer peripheral portion of the bending pulley 28, the upper bending operation wire 23 is pulled, and the lower bending operation wire 23 is pulled.
Is pushed back, and the gap 20a on the distal end side of the bending portion 8 is bent upward. Therefore, before inserting the forceps into the body cavity, the movable piece 20 can be moved in the front-rear direction to select a curved position formed by the gap portion 20a, and the forceps portion 9 can approach a target site in the body cavity.

【００１８】図７及び図８は第２の実施形態を示し、湾
曲操作ノブ６の回転角（θ）が一定であっても湾曲部８
の湾曲半径を変更できるようにしたものである。すなわ
ち、操作部１の本体１ａには操作ロッド１８と同軸的に
嵌合孔３０が設けられ、この嵌合孔３０には固定側推進
筒３１の基端部が挿入固定され、この固定側推進筒３１
の碁端部には軸方向にスリット３２が設けられ、先端側
の突出部にはおねじ部３３が設けられている。FIGS. 7 and 8 show a second embodiment, in which the bending portion 8 is rotated even when the rotation angle (θ) of the bending operation knob 6 is constant.
Can be changed. That is, a fitting hole 30 is provided coaxially with the operation rod 18 in the main body 1a of the operating portion 1, and the base end of the fixed-side propulsion cylinder 31 is inserted and fixed into the fitting hole 30. Cylinder 31
A slit 32 is provided in the axial direction at the go end, and a male screw 33 is provided at the protruding portion on the tip side.

【００１９】固定側推進筒３１の内部にはシース部７の
基端部が軸方向に進退自在に挿入され、このシース部７
の基端には固定側推進筒３１のスリット３２に係合する
突起３４が設けられ、シース部７が回り止めされてい
る。さらに、固定側推進筒３１の先端部より突出するシ
ース部７には固定リング３５が嵌着され、この固定リン
グ３５には環状溝３６が設けられている。また、固定側
推進筒３１のおねじ部３３には外周面にローレット加工
を施した可動側推進筒３７のめねじ部３８が螺合されて
おり、この可動側推進筒３７には環状溝３６と係合する
係合部３９が一体に設けられている。The base end of the sheath 7 is inserted into the fixed-side propulsion tube 31 so as to be able to advance and retreat in the axial direction.
At the base end, a projection 34 that engages with the slit 32 of the fixed-side propulsion cylinder 31 is provided, and the sheath 7 is prevented from rotating. Further, a fixing ring 35 is fitted to the sheath 7 protruding from the distal end of the fixed-side propulsion cylinder 31, and the fixing ring 35 is provided with an annular groove 36. An external thread portion 33 of a movable-side propulsion cylinder 37 having a knurled outer peripheral surface is screwed into an external thread portion 33 of the fixed-side propulsion cylinder 31. And an engaging portion 39 that engages with the shaft is integrally provided.

【００２０】次に、第２の実施形態の作用について説明
する。図７に示すように、先端側は１個の移動駒２０と
し、基端側に７個の移動駒２０を連結して先端側に空隙
部２０ａを形成した状態を示す。可動側推進筒３７を例
えば右方向に回転してめねじ部３８を固定側推進筒３１
のおねじ部３３に螺合すると、可動側推進筒３７は後退
し、可動側推進筒３７の後退に伴って固定リング３５を
介してシース部７が固定側推進筒３１にガイドされて後
退する。したがって、シース部７に連結された７個の移
動駒２０が一体的に後退して湾曲部８の空隙部２０ａの
間隔長Ｌが長くなる。Next, the operation of the second embodiment will be described. As shown in FIG. 7, a state is shown in which one movable piece 20 is provided on the distal end side, and seven movable pieces 20 are connected on the base end side to form a gap 20a on the distal end side. The movable propulsion cylinder 37 is rotated, for example, clockwise to change the female thread 38 to the fixed propulsion cylinder 31.
When the movable propulsion cylinder 37 is screwed into the male screw section 33, the sheath section 7 is guided by the fixed propulsion cylinder 31 via the fixing ring 35 and retreats as the movable propulsion cylinder 37 retreats. . Therefore, the seven moving pieces 20 connected to the sheath portion 7 are integrally retracted, and the interval length L of the gap portion 20a of the curved portion 8 is increased.

【００２１】この状態で、鉗子を経内視鏡的に体腔内に
挿入し、操作部１の湾曲操作ノブ６を時計回りに回転さ
せると、回転軸２７を介して湾曲滑車２８が同方向に回
転し、この湾曲滑車２８の外周部に連結された２本の湾
曲操作ワイヤ２３のうち、上側の湾曲操作ワイヤ２３が
引っ張られ、下側の湾曲操作ワイヤ２３が押し戻されて
湾曲部８の先端側の空隙部２０ａが上側に湾曲するが、
空隙部２０ａの間隔長Ｌが長いために大きな湾曲半径と
なる。In this state, when the forceps is inserted endoscopically into the body cavity and the bending operation knob 6 of the operating section 1 is rotated clockwise, the bending pulley 28 is rotated in the same direction via the rotating shaft 27. Of the two bending operation wires 23 connected to the outer periphery of the bending pulley 28, the upper bending operation wire 23 is pulled, and the lower bending operation wire 23 is pushed back, so that the distal end of the bending portion 8 is rotated. The side gap 20a is curved upward,
Since the interval length L of the gap 20a is long, the radius of curvature becomes large.

【００２２】次に、可動側推進筒３７を左方向に回転す
ると、可動側推進筒３７は前進し、可動側推進筒３７の
前進に伴って固定リング３５を介してシース部７が固定
側推進筒３１にガイドされて前進する。したがって、シ
ース部７に連結された７個の移動駒２０が一体的に前進
して湾曲部８の空隙部２０ａの間隔長Ｌが短くなる。Next, when the movable propulsion barrel 37 is rotated to the left, the movable propulsion barrel 37 moves forward, and the sheath 7 is fixedly propelled via the fixing ring 35 as the movable propulsion barrel 37 advances. It moves forward while being guided by the cylinder 31. Therefore, the seven moving pieces 20 connected to the sheath portion 7 advance integrally, and the interval length L of the gap portion 20a of the curved portion 8 is reduced.

【００２３】この状態で、鉗子を経内視鏡的に体腔内に
挿入し、操作部１の湾曲操作ノブ６を時計回りに回転さ
せると、回転軸２７を介して湾曲滑車２８が同方向に回
転し、この湾曲滑車２８の外周部に連結された２本の湾
曲操作ワイヤ２３のうち、上側の湾曲操作ワイヤ２３が
引っ張られ、下側の湾曲操作ワイヤ２３が押し戻されて
湾曲部８の先端側の空隙部２０ａが上側に湾曲するが、
空隙部２０ａの間隔長Ｌが短いために小さな湾曲半径と
なる。つまり、湾曲操作ノブ６の回転角が同じであって
もシース部７を進退して空隙部２０ａの間隔長を変更す
ることにより任意の湾曲半径で湾曲部８を湾曲させるこ
とができる。In this state, when the forceps is inserted endoscopically into the body cavity and the bending operation knob 6 of the operation unit 1 is rotated clockwise, the bending pulley 28 is rotated in the same direction via the rotation shaft 27. Of the two bending operation wires 23 connected to the outer periphery of the bending pulley 28, the upper bending operation wire 23 is pulled, and the lower bending operation wire 23 is pushed back, so that the distal end of the bending portion 8 is rotated. The side gap 20a is curved upward,
Since the interval length L between the gaps 20a is short, the radius of curvature is small. That is, even if the rotation angle of the bending operation knob 6 is the same, the bending portion 8 can be bent with an arbitrary bending radius by moving the sheath portion 7 back and forth and changing the interval length of the gap portion 20a.

【００２４】図９及び図１０は、第３の実施形態を示
し、第１及び第２の実施形態においては、移動駒２０
は、円筒体をその軸線に対して直角に切断した短筒状部
材であり、隣り合う複数個の移動駒２０の大径部２１ａ
を小径部２１ｂに嵌合することにより直線上の円筒形状
に形成されるようにしたものであるが、本実施形態は、
隣り合う複数個の移動駒２０の大径部２１ａを小径部２
１ｂに嵌合することにより緩やかな曲線の円筒形状に形
成されるようにしたものである。FIGS. 9 and 10 show a third embodiment. In the first and second embodiments, a moving piece 20 is shown.
Is a short cylindrical member obtained by cutting a cylindrical body at right angles to its axis, and the large-diameter portions 21a of a plurality of adjacent moving pieces 20
Is fitted into the small diameter portion 21b to form a straight cylindrical shape.
The large-diameter portion 21a of the plurality of adjacent moving pieces 20 is
1b, it is formed in a cylindrical shape with a gentle curve.

【００２５】すなわち、移動駒２０の小径部２１ｂ側を
軸心Ｏに対して例えばα＝１゜だけ一方向に傾斜させて
形成されている。このように構成された移動駒２０を複
数個用意し、第１の実施形態と同様に、大径部２１ａの
拡径部２１ｃを小径部２１ｂに嵌合することにより、図
１０（ａ）に示すように挿入部２が緩やかな曲線状とな
る。That is, the movable piece 20 is formed such that the small-diameter portion 21b side of the movable piece 20 is inclined with respect to the axis O by, for example, α = 1 ° in one direction. By preparing a plurality of moving pieces 20 configured as described above and fitting the large-diameter portion 21c of the large-diameter portion 21a to the small-diameter portion 21b as in the first embodiment, FIG. As shown, the insertion portion 2 has a gentle curved shape.

【００２６】したがって、内視鏡の処置具チャンネル等
を介することなく、腹腔等に挿入し、第１の実施形態と
同様に、操作部１の湾曲操作ノブ６を時計回りに回転さ
せると、回転軸２７を介して湾曲滑車２８が同方向に回
転し、この湾曲滑車２８の外周部に連結された２本の湾
曲操作ワイヤ２３のうち、一方の湾曲操作ワイヤ２３が
引っ張られ、他方の湾曲操作ワイヤ２３が押し戻されて
湾曲部８の先端側の空隙部２０ａが図１０（ｂ）に示す
ように、挿入部２の湾曲方向と同方向に湾曲する。ま
お、移動駒２０を前後方向に移動させることにより、空
隙部２０ａからなる湾曲位置を選択できることは第１の
実施形態と同様である。Therefore, when the bending operation knob 6 of the operation section 1 is inserted clockwise into the abdominal cavity or the like without going through the treatment instrument channel of the endoscope and rotated in the clockwise direction as in the first embodiment, The bending pulley 28 rotates in the same direction via the shaft 27, and one of the two bending operation wires 23 connected to the outer peripheral portion of the bending pulley 28 is pulled, and the other bending operation wire is pulled. The wire 23 is pushed back, and the gap 20a on the distal end side of the bending portion 8 bends in the same direction as the bending direction of the insertion portion 2 as shown in FIG. As in the first embodiment, it is possible to select a curved position formed by the gap 20a by moving the moving piece 20 in the front-rear direction.

【００２７】前記構成によれば、次のような構成が得ら
れる。 （付記１）操作部と、この操作部に設けられ先端に鉗子
部を有する挿入部とからなる鉗子において、前記挿入部
は、互いに軸方向に連結したとき略直線上となり、切離
したときその空隙部が湾曲部となる複数の短筒状部材
と、これら短筒状部材の周縁部を軸方向に貫通し、一端
部が前記挿入部の先端側に接続され他端部が前記操作部
に接続され押し引き操作して前記湾曲部を湾曲する湾曲
操作操作ワイヤとからなることを特徴とする鉗子。According to the above configuration, the following configuration is obtained. (Supplementary Note 1) In a forceps including an operation portion and an insertion portion provided at the operation portion and having a forceps portion at a distal end, the insertion portions are substantially linear when they are connected to each other in the axial direction, and the gap is formed when separated. A plurality of short tubular members whose portions become curved portions, and axially penetrate the peripheral edge portions of these short tubular members, one end of which is connected to the distal end side of the insertion portion and the other end of which is connected to the operation portion. And a bending operation operation wire for bending the bending portion by a push-pull operation.

【００２８】（付記２）操作部と、この操作部に設けら
れ先端に鉗子部を有する挿入部とからなる鉗子におい
て、前記挿入部は、互いに軸方向に連結したとき略直線
上となり、切離したときその空隙部が湾曲部となる複数
の短筒状部材と、これら短筒状部材の周縁部を軸方向に
貫通し、一端部が前記挿入部の先端側に接続され他端部
が前記操作部に接続され押し引き操作して前記湾曲部を
湾曲する湾曲操作操作ワイヤと、前記空隙部における湾
曲操作ワイヤの長さを変化させ湾曲半径を変化させる手
段とからなることを特徴とする鉗子。(Supplementary Note 2) In a forceps including an operation portion and an insertion portion provided on the operation portion and having a forceps portion at a distal end, the insertion portions are substantially linear when connected to each other in the axial direction, and are separated. When the gap portion is a curved portion, the plurality of short tubular members are curved portions, and the peripheral portions of these short tubular members are axially penetrated, and one end is connected to the distal end of the insertion portion and the other end is operated. A forceps, comprising: a bending operation wire connected to the portion for bending the bending portion by a push-pull operation; and means for changing a length of the bending operation wire in the gap to change a bending radius.

【００２９】（付記３）前記短筒状部材は、円筒体で、
一端に小径部、他端に前記小径部に嵌合する大径部を有
し、直線上に連結可能であることを特徴とする付記１ま
たは２記載の鉗子。(Supplementary Note 3) The short cylindrical member is a cylindrical body,
The forceps according to claim 1 or 2, wherein the forceps has a small-diameter portion at one end and a large-diameter portion fitted to the small-diameter portion at the other end, and can be connected linearly.

【００３０】（付記４）前記短筒状部材は、円筒体で、
一端に小径部、他端に前記小径部に嵌合する大径部を有
し、曲線状に連結可能であることを特徴とする付記１ま
たは２記載の鉗子。(Supplementary Note 4) The short tubular member is a cylindrical body,
3. The forceps according to claim 1 or 2, wherein the forceps have a small-diameter portion at one end and a large-diameter portion fitted to the small-diameter portion at the other end, and are connectable in a curved shape.

【００３１】[0031]

【発明の効果】以上説明したように、この発明によれ
ば、挿入部に、互いに軸方向に連結したとき略直線上と
なり、切離したときその空隙部が湾曲部となる複数の短
筒状部材を設けることにより、短筒状部材を軸方向に移
動して空隙部の位置を選択することにより、挿入部の任
意の位置を湾曲させることができ、先端部の鉗子部を目
的部位に容易にアプローチできるという効果がある。As described above, according to the present invention, a plurality of short tubular members are formed so as to be substantially linear when they are connected to each other in the axial direction, and to form curved portions when cut off. By disposing the short cylindrical member in the axial direction and selecting the position of the gap, any position of the insertion portion can be bent, and the forceps portion at the distal end can be easily moved to the target site. The effect is that you can approach.

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

【図１】この発明の第１の実施形態の鉗子の全体構成
図。FIG. 1 is an overall configuration diagram of a forceps according to a first embodiment of the present invention.

【図２】同実施形態の鉗子の先端部を示す縦断側面図。FIG. 2 is a longitudinal sectional side view showing a distal end portion of the forceps of the embodiment.

【図３】同実施形態の鉗子を示し、（ａ）は挿入部を一
部切欠した側面図、（ｂ）は操作部を一部切欠した側面
図。3A and 3B show the forceps of the embodiment, wherein FIG. 3A is a side view in which an insertion portion is partially cut away, and FIG. 3B is a side view in which an operation portion is partially cut out.

【図４】同実施形態の移動駒の縦断側面図。FIG. 4 is a vertical side view of the moving piece of the embodiment.

【図５】同実施形態の鉗子を示し、（ａ）は挿入部の湾
曲部を湾曲した状態の一部切欠した側面図、（ｂ）は湾
曲した時の操作部を一部切欠した側面図。FIGS. 5A and 5B show the forceps of the embodiment, wherein FIG. 5A is a side view in which a bending portion of an insertion portion is partially cut away, and FIG. .

【図６】同実施形態の挿入部の湾曲部を湾曲した状態の
一部切欠した側面図。FIG. 6 is a partially cut-away side view of the insertion section according to the embodiment in a state where the bending section is curved.

【図７】この発明の第２の実施形態における湾曲部の湾
曲半径を大きくした状態を示し、（ａ）は湾曲部の一部
切欠した側面図、（ｂ）は操作部の一部切欠した側面
図。FIGS. 7A and 7B show a state in which a bending radius of a bending portion in the second embodiment of the present invention is increased, wherein FIG. 7A is a side view of the bending portion with a part cut away, and FIG. Side view.

【図８】この発明の第２の実施形態における湾曲部の湾
曲半径を小さくした状態を示し、（ａ）は湾曲部の一部
切欠した側面図、（ｂ）は操作部の一部切欠した側面
図。8A and 8B show a state in which the bending radius of the bending portion is reduced in the second embodiment of the present invention. FIG. 8A is a side view of the bending portion with a part cut away, and FIG. Side view.

【図９】この発明の第３の実施形態の移動駒の縦断側面
図。FIG. 9 is a vertical sectional side view of a moving piece according to a third embodiment of the present invention.

【図１０】同実施形態の湾曲部を示し、（ａ）アングル
を掛けない状態の挿入部の縦断側面図、（ｂ）アングル
を掛けた状態の挿入部の縦断側面図。10A and 10B show the bending portion of the embodiment, and FIG. 10A is a vertical side view of the insertion portion in a state where no angle is applied, and FIG. 10B is a vertical side view of the insertion portion in a state where the angle is applied.

【符号の説明】[Explanation of symbols]

１…操作部 ２…挿入部 ８…湾曲部 ９…鉗子部 ２０…移動駒（短筒状部材） ２０ａ…空隙部 ２３…湾曲操作ワイヤ DESCRIPTION OF SYMBOLS 1 ... Operation part 2 ... Insertion part 8 ... Bending part 9 ... Forceps part 20 ... Moving piece (short cylindrical member) 20a ... Void part 23 ... Bending operation wire

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 操作部と、この操作部に設けられ先端に
鉗子部を有する挿入部とからなる鉗子において、 前記挿入部は、互いに軸方向に連結したとき略直線上と
なり、切離したときその空隙部が湾曲部となる複数の短
筒状部材と、これら短筒状部材の周縁部を軸方向に貫通
し、一端部が前記挿入部の先端側に接続され他端部が前
記操作部に接続され押し引き操作して前記湾曲部を湾曲
する湾曲操作ワイヤとからなることを特徴とする鉗子。1. A forceps comprising an operating portion and an insertion portion provided on the operation portion and having a forceps portion at a tip, wherein the insertion portions are substantially linear when connected to each other in the axial direction, and A plurality of short tubular members in which the void portion becomes a curved portion, penetrate the peripheral portion of these short tubular members in the axial direction, one end is connected to the distal end side of the insertion portion, and the other end is connected to the operation portion. And a bending operation wire connected to bend and push and pull the bending portion to bend the bending portion.