JP2005270420A - Endoscope and treatment tool insertion and removal device for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To operate transportation of a treatment tool in a forceps channel in a short time with a simple structure and to make it possible to facilitate a technique. <P>SOLUTION: An endoscope 1 is equipped with an insertion section 11 to be inserted in a body cavity, an operation section 14 for operating the insertion section 11, a first channel of which the one end is a pointed head aperture section 12a to be open at a pointed head of the insertion section 11 and the other end is connected to a forceps hole 18 to be open in the vicinity of the operation section 14, and the treatment tool 20 which is inserted in the first channel. The endoscope further includes a second channel which is provided from the vicinity of the forceps hole 18 to the pointed head of the insertion section 11, an operation wire which is inserted from a proximal end of the second channel and folded back at the pointed head of the insertion section 11 to be inserted into the first channel, an engagement member which is engaged to the vicinity of the pointed head of the treatment tool 20 provided at the pointed head of the operation wire and a movement of the treatment tool controlling section which is provided at the proximal end of the operation wire. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、内視鏡を介して体腔内に挿入される処置具を挿抜可能な内視鏡に関するものである。   The present invention relates to an endoscope capable of inserting and removing a treatment tool inserted into a body cavity via an endoscope.

一般に、内視鏡を用いて体外からの操作で体内の所要部位の処置や生体組織の検査等を行う際に、例えば、針状メスや把持鉗子等の複数の処置具を連続して使用することがある。このような場合、従来は、内視鏡の挿入部内に設けられた鉗子チャンネルを通じて選択した処置具を体内に挿入し、所定の処置を行った後は処置具を体外に引き出し、再度鉗子をチャンネルに挿入する等の操作を行っていた。   In general, when performing a treatment of a required part in the body or an examination of a living tissue by an operation from outside the body using an endoscope, for example, a plurality of treatment tools such as a needle knife and a grasping forceps are continuously used. Sometimes. In such a case, conventionally, the selected treatment tool is inserted into the body through a forceps channel provided in the insertion portion of the endoscope, and after performing a predetermined treatment, the treatment tool is pulled out of the body, and the forceps is channeled again. And so on.

そのため、体腔内の患部等の生体組織を観察する内視鏡に用いられる処置具として、内視鏡に形成された鉗子口を介して体腔内に挿入された鉗子等の処置具を自動時に挿入，抜脱しかつその挿入量を制御する装置を備えたものが提案されている。（例えば、特許文献１参照。）。
この特許文献１に記載の内視鏡は、内視鏡側の操作部に設けられマイクロモータの回転軸に固着された２つのギアと、このギアに軸着されたドラムと、駆動回路を介してマイクロモータを制御するモータ駆動制御部とを備えている。そして、マイクロモータの駆動により、マイクロモータが励磁され回転駆動すると、ギアが回転するため、ドラムの間に処置具を挿入することにより、鉗子チャンネル内において処置具を搬送させるものである。
特開昭５７−１１７８２３号公報（第１図等） Therefore, as a treatment tool used in an endoscope for observing living tissue such as an affected part in a body cavity, a treatment tool such as a forceps inserted into the body cavity is automatically inserted through a forceps opening formed in the endoscope. , One having a device for removing and controlling the amount of insertion has been proposed. (For example, refer to Patent Document 1).
The endoscope described in Patent Document 1 is provided with two gears provided in an operation unit on the endoscope side and fixed to a rotating shaft of a micromotor, a drum attached to the gear, and a drive circuit. And a motor drive control unit for controlling the micromotor. When the micromotor is excited and rotated by the driving of the micromotor, the gear rotates, so that the treatment instrument is conveyed in the forceps channel by inserting the treatment instrument between the drums.
JP 57-117823 A (Fig. 1 etc.)

しかしながら、特許文献１に記載の内視鏡では、マイクロモータ及びモータ駆動回路等の制御部が必要となり、部品数が増加してしまい、簡易な構成とすることが困難であった。
本発明は上述した事情に鑑みてなされたものであって、簡易な構成で、鉗子チャンネル内において処置具を搬送する操作が短時間ででき、手技の容易化を可能とする内視鏡を提供することを目的とする。 However, the endoscope described in Patent Document 1 requires a control unit such as a micromotor and a motor drive circuit, which increases the number of components and makes it difficult to have a simple configuration.
The present invention has been made in view of the above-described circumstances, and provides an endoscope that can perform a procedure easily by performing an operation for transporting a treatment instrument in a forceps channel in a short time with a simple configuration. The purpose is to do.

上記目的を達成するために、本発明は、以下の手段を提供する。
本発明の内視鏡は、体腔内に挿入される挿入部と、該挿入部を操作するための操作部と、一端が前記挿入部の先端に開口する先端開口部を有するとともに、他端が前記操作部の近傍に開口する鉗子口に接続される第１のチャンネルと、該第１のチャンネルに挿入される処置具とを備えた内視鏡において、前記鉗子口の近傍から前記挿入部の先端にかけて設けた第２のチャンネルと、該第２のチャンネルの基端から挿入され、前記挿入部の先端で折り返され前記第１のチャンネルに挿入される操作ワイヤと、該操作ワイヤの先端に設けられ、前記処置具の先端近傍に係合される係合部材と、前記操作ワイヤの基端に設けられた処置具進退操作部とを備えることを特徴としている。 In order to achieve the above object, the present invention provides the following means.
The endoscope of the present invention has an insertion portion to be inserted into a body cavity, an operation portion for operating the insertion portion, a distal end opening portion with one end opening at the distal end of the insertion portion, and the other end is In an endoscope comprising a first channel connected to a forceps opening that opens in the vicinity of the operation section, and a treatment instrument that is inserted into the first channel, the insertion section of the insertion section is located near the forceps opening. A second channel provided over the distal end, an operation wire inserted from the proximal end of the second channel, folded back at the distal end of the insertion portion and inserted into the first channel, and provided at the distal end of the operation wire And an engagement member engaged in the vicinity of the distal end of the treatment instrument, and a treatment instrument advancing / retreating operation portion provided at the proximal end of the operation wire.

この発明では、操作ワイヤの先端に設けられた係合部材に処置具を装着した後、処置具進退操作部を第２のチャンネルの基端側に引っ張ることによって、操作ワイヤが第１のチャンネルから第２のチャンネルへ移動し、処置具が先端開口部へ搬送される。したがって、処置具を先端開口部へ搬送させる際、従来のようにモータや制御部などの装置を備える必要がなくなり、簡易な構成で、容易に処置具を進退させることができる。   In this invention, after attaching the treatment tool to the engaging member provided at the distal end of the operation wire, the operation wire is moved from the first channel by pulling the treatment tool advancing / retreating operation portion toward the proximal end side of the second channel. It moves to a 2nd channel and a treatment tool is conveyed to a front-end | tip opening part. Therefore, when the treatment instrument is transported to the distal end opening, it is not necessary to provide a device such as a motor or a control unit as in the prior art, and the treatment instrument can be easily advanced and retracted with a simple configuration.

また、本発明の内視鏡は、前記操作ワイヤが、前記係合部材を有する第１のワイヤ部と前記処置具進退操作部を有する第２のワイヤ部とに分かれ、前記第１のワイヤ部の基端側が巻回される第１の回転部材と、前記第２のワイヤ部の先端側が巻回され、前記第２のワイヤ部を前記第２のチャンネル内に巻き取る回転方向に付勢する第２の回転部材と、該第２の回転部材が前記第２のワイヤ部を前記第２のチャンネルの基端側から引っ張った際に、前記第１の回転部材が前記第２の回転部材に連動して同一方向に回転し、前記第２の回転部材が前記第２のワイヤ部を巻き取る方向に回転するときは、前記第１の回転部材の同一方向への回転を規制させる係止部とを備えていることを特徴としている。   In the endoscope of the present invention, the operation wire is divided into a first wire portion having the engagement member and a second wire portion having the treatment instrument advancing / retreating operation portion, and the first wire portion. The first rotating member wound on the proximal end side of the wire and the distal end side of the second wire portion are wound, and urged in the rotation direction in which the second wire portion is wound into the second channel. A second rotating member; and when the second rotating member pulls the second wire portion from the proximal end side of the second channel, the first rotating member becomes the second rotating member. When the second rotating member rotates in the same direction in conjunction with and rotates in the direction in which the second wire portion is wound, the locking portion restricts the rotation of the first rotating member in the same direction. It is characterized by having.

この発明では、第１のワイヤ部に設けられた係合部材に処置具を装着した後、操作者が処置具進退操作部を第２のチャンネルの基端側に引っ張ることによって、第２の回転部材が回転する。この回転に伴って第１の回転部材も回転し、第１のワイヤ部が第１の回転部材に巻回されるとともに、処置具が先端開口部の方向に移動する。次いで、操作者が処置具進退操作部を引っ張る力を緩めると、第２の回転部材が第２のワイヤ部を巻き取る方向に付勢され、第１の回転部材は第２の回転部材との同一方向への回転が規制されているので、第２の回転部材のみが回転し、第２のワイヤ部が第２の回転部材に巻回される。したがって、この動作を繰り返すことにより、処置具を先端開口部へ搬送させることが可能となる。すなわち、第１，第２の回転部材を備えることにより、第２のワイヤ部を第２のチャンネルの基端側へ引っ張る際に、第２のワイヤ部が第２のチャンネル内に戻され第２の回転部材に巻回される。これによって、第２のチャンネルから露出する第２のワイヤ部が短くなり、操作性の向上を図ることができる。   In this invention, after attaching a treatment tool to the engaging member provided in the first wire part, the operator pulls the treatment tool advancing / retreating operation part toward the proximal end side of the second channel, so that the second rotation is performed. The member rotates. With this rotation, the first rotating member also rotates, the first wire portion is wound around the first rotating member, and the treatment instrument moves in the direction of the distal end opening. Next, when the operator loosens the pulling force of the treatment instrument advancing / retreating operation portion, the second rotating member is biased in the direction of winding the second wire portion, and the first rotating member is engaged with the second rotating member. Since rotation in the same direction is restricted, only the second rotating member rotates, and the second wire portion is wound around the second rotating member. Therefore, by repeating this operation, the treatment instrument can be transported to the distal end opening. That is, by providing the first and second rotating members, the second wire portion is returned into the second channel when the second wire portion is pulled toward the proximal end side of the second channel. It is wound around the rotating member. Thereby, the second wire portion exposed from the second channel is shortened, and the operability can be improved.

本発明の内視鏡用処置具挿抜装置は、内視鏡に形成された鉗子チャンネル内で処置具を進退させる内視鏡用処置具挿抜装置において、前記内視鏡の先端部に着脱可能とされたフードと、前記鉗子チャンネルの基端から挿入され、前記フードで折り返され前記鉗子チャンネルに挿入される操作ワイヤと、該操作ワイヤの先端に設けられた前記処置具の先端近傍に係合される係合部材と、前記操作ワイヤの基端に設けられた処置具進退操作部と、前記鉗子チャンネルに挿通された鉗子口に設けられた鉗子栓または鉗子栓近傍に着脱可能に設けられた固定部材と、前記フードに先端が固定されているとともに前記固定部材に基端側が固定され、前記鉗子チャンネル先端で折り返えされた前記処置具進退操作部側の前記操作ワイヤを挿通させる挿通管とを備えていることを特徴としている。   The endoscope treatment instrument insertion / extraction apparatus of the present invention is an endoscope treatment instrument insertion / extraction apparatus that advances and retracts a treatment instrument in a forceps channel formed in the endoscope, and is attachable to and detachable from the distal end portion of the endoscope. A hood, an operation wire inserted from the proximal end of the forceps channel, folded back by the hood and inserted into the forceps channel, and engaged in the vicinity of the distal end of the treatment instrument provided at the distal end of the operation wire. An engaging member, a treatment instrument advancing / retreating operation portion provided at the proximal end of the operation wire, and a forceps plug provided in a forceps opening inserted through the forceps channel or a fixing provided in the vicinity of the forceps plug. And an insertion tube having a distal end fixed to the hood and a proximal end fixed to the fixing member, and the operation wire on the treatment instrument advancing / retreating operation portion side being folded back at the distal end of the forceps channel. It is characterized in that it comprises a.

この発明では、まず、フードを内視鏡先端部に装着し、固定部材を鉗子栓または鉗子栓近傍に装着する。そして、操作ワイヤの先端に設けられた係合部材に処置具を装着し、操作ワイヤの他端に設けられた処置具進退操作部を鉗子チャンネルの基端側に引っ張る。これによって、係合部材が鉗子チャンネル内を搬送されるとともに処置具が挿通管の先端側へ搬送させることが可能となる。この場合において、内視鏡に内視鏡用処置具挿抜装置を取り付けることにより、簡単に処置具の搬送を可能とする内視鏡にすることができる。   In this invention, first, the hood is attached to the distal end portion of the endoscope, and the fixing member is attached to the forceps plug or the vicinity of the forceps plug. Then, the treatment instrument is attached to the engaging member provided at the distal end of the operation wire, and the treatment instrument advance / retreat operation portion provided at the other end of the operation wire is pulled toward the proximal end side of the forceps channel. As a result, the engaging member is conveyed in the forceps channel and the treatment instrument can be conveyed to the distal end side of the insertion tube. In this case, by attaching the endoscope treatment tool insertion / extraction device to the endoscope, the endoscope can be easily transported.

また、本発明の内視鏡用処置具挿抜装置は、前記固定部材に、前記係合部材に前記処置具を取り付ける際、前記処置具を支持する支持台が設けられていることを特徴としている。
この発明では、固定部材に支持台が設けられているので、係合部材に処置具を着脱する際、支持台に係合部材を支持させながら作業を行うことができる。したがって、処置具の着脱作業が容易になるため、着脱時間の短縮化を図ることが可能となる。 The endoscope treatment instrument insertion / extraction apparatus according to the present invention is characterized in that when the treatment instrument is attached to the engaging member, a support base for supporting the treatment instrument is provided on the fixing member. .
In this invention, since the support member is provided on the fixing member, when the treatment tool is attached to or detached from the engagement member, the work can be performed while the support member supports the engagement member. Therefore, the treatment tool can be easily attached and detached, so that the attachment and detachment time can be shortened.

本発明に係る内視鏡及び内視鏡用処置具挿抜装置によれば、操作ワイヤに設けられた処置具進退操作部を引っ張ることによって処置具を進退させることができる。したがって、簡単な手技により内視鏡に処置具を挿抜することができるため、手技の容易化を図ることが可能となる。   According to the endoscope and the endoscope treatment instrument insertion / extraction device according to the present invention, the treatment instrument can be advanced and retracted by pulling the treatment instrument advancing / retreating operation portion provided on the operation wire. Therefore, since the treatment tool can be inserted into and removed from the endoscope by a simple technique, the technique can be facilitated.

以下、本発明の第１実施形態に係る内視鏡について図１から図３を参照して説明する。
本実施形態に係る内視鏡処置システム１は、図１に示すように、体腔内へ挿入される細長の内視鏡挿入部（挿入部）１１を有しており、これは、硬質の内視鏡先端部１２と、この内視鏡先端部１２の基端に設けられた湾曲自在の湾曲部１３と、この湾曲部１３の後端から内視鏡操作部（操作部）１４まで伸びる長尺の可撓部１５とから構成されている。また、湾曲部１３は、内視鏡操作部１４に設けられた湾曲操作ノブ１６を操作することにより、上下、左右における任意の方向に湾曲することができるようになっている。また、前記内視鏡操作部１４には、ユニバーサルコード１７が延出されており、図示しない内視鏡本体と接続されている。また、内視鏡挿入部１１の内部には、体腔内の処置を行う処置具２０を搬送させる処置具搬送機構３０が設けられている。 Hereinafter, an endoscope according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, the endoscope treatment system 1 according to the present embodiment has an elongated endoscope insertion portion (insertion portion) 11 that is inserted into a body cavity. A distal end portion 12, a bendable bending portion 13 provided at the proximal end of the endoscope distal end portion 12, and a length extending from the rear end of the bending portion 13 to an endoscope operation portion (operation portion) 14. It is comprised from the flexible part 15 of a scale. The bending portion 13 can be bent in any direction in the vertical and horizontal directions by operating a bending operation knob 16 provided in the endoscope operation portion 14. A universal cord 17 extends from the endoscope operation unit 14 and is connected to an endoscope body (not shown). In addition, a treatment instrument transport mechanism 30 that transports the treatment instrument 20 for performing treatment in the body cavity is provided inside the endoscope insertion portion 11.

前記処置具搬送機構３０は、図２示すように、内視鏡操作部１４に設けられた鉗子口１８から内視鏡先端部１２に開口する先端開口部１２ａにかけて、処置具２０を進退させるものである。この処置具搬送機構３０は、図３及び図４に示すように、一端が内視鏡先端部１２に開口する先端開口部１２ａを有し、かつ他端が内視鏡操作部１４に開口する鉗子口１８に接続されるとともに、内部に処置具を挿通可能な第１のチャンネル３１と、鉗子口１８の近傍から内視鏡挿入部１１の先端にかけて設けた第２のチャンネル３２と、この第２のチャンネル３２の基端３２ａから挿入されるとともに、内視鏡先端部１２に設けられ回転自在なプーリ３３で折り返され第１のチャンネル３１に挿入される操作ワイヤ３４とを備えている。また、操作部ワイヤは、処置具２０の先端に係合される係合部材３５を有する第１のワイヤ部３４ａと、リング状のハンドル部（処置具進退操作部）３６を有する第２のワイヤ部３４ｂとに分かれている。   As shown in FIG. 2, the treatment instrument transport mechanism 30 advances and retracts the treatment instrument 20 from a forceps port 18 provided in the endoscope operation section 14 to a distal end opening portion 12 a that opens to the endoscope distal end section 12. It is. As shown in FIGS. 3 and 4, the treatment instrument transport mechanism 30 has a distal end opening portion 12 a that opens to the endoscope distal end portion 12, and the other end opens to the endoscope operation portion 14. A first channel 31 that is connected to the forceps port 18 and allows a treatment tool to be inserted therein, a second channel 32 provided from the vicinity of the forceps port 18 to the distal end of the endoscope insertion portion 11, and the first channel 31 The operation wire 34 is inserted from the proximal end 32 a of the second channel 32 and is folded back by a rotatable pulley 33 provided at the distal end portion 12 of the endoscope and inserted into the first channel 31. The operation part wire includes a first wire part 34a having an engagement member 35 engaged with the distal end of the treatment instrument 20, and a second wire having a ring-shaped handle part (treatment instrument advance / retreat operation part) 36. It is divided into a part 34b.

また、処置具２０は、図１及び図４に示すように、鉗子口１８から第１のチャンネル３１内に挿通される可撓性の挿入部２１と、この挿入部２１の先端２１ａに接続された鉗子部２２と、挿入部２１の基端２１ｂに接続されて鉗子部２２を操作する操作部２３とを備えている。
前記係合部材３５には、図４に示すように、支持板３５ａに垂直に設けられた切欠け部３５ｂが形成されている。また、挿入部２１が鉗子部２２より小さい外径になっているため、切欠け部３５ｂが、挿入部２１と鉗子部２２との接続部にあたる挿入部２１の先端２１ａにおいて係止可能となっている。 Further, as shown in FIGS. 1 and 4, the treatment instrument 20 is connected to a flexible insertion portion 21 inserted from the forceps port 18 into the first channel 31 and a distal end 21 a of the insertion portion 21. A forceps portion 22 and an operation portion 23 that is connected to the proximal end 21 b of the insertion portion 21 and operates the forceps portion 22.
As shown in FIG. 4, the engaging member 35 is formed with a notch 35b provided perpendicular to the support plate 35a. Further, since the insertion portion 21 has an outer diameter smaller than that of the forceps portion 22, the cutout portion 35 b can be locked at the distal end 21 a of the insertion portion 21 corresponding to the connection portion between the insertion portion 21 and the forceps portion 22. Yes.

さらに、処置具搬送機構３０には、操作ワイヤ３４を巻き取るラチェット機構４０が設けられており、開口部４１ａを有し第２のチャンネル３２の基端３２ａに設けられた支持部材４１に備えられている。このラチェット機構４０は、Ａ方向に回転したとき、第１のワイヤ部３４ａの一端側が巻回される第１の回転部材４２と、Ｂ方向に回転したとき、第２のワイヤ部３４ｂの一端側が巻回される第２の回転部材４４と、第１の回転部材４２及び第２の回転部材４４を回転自在に支持し、支持部材４１に対し回転不能に取り付けられた支軸４５と、支軸４５の外周面に配され、第１の回転部材４２及び第２の回転部材４４を近接する方向に付勢されたコイルスプリング４６と、第２の回転部材４４をＢ方向の回転に付勢するうず巻きバネ４３を収納し、第２の回転部材４４と一体的に回転するように第２の回転部材４４に接合されたバネケース４７と、このバネケース４７の外周面に沿って設けられた凹部４７ａに嵌合し、バネケース４７と相対回転可能な移動部材４８とを備えている。また、うず巻きバネ４３は、一端が支軸４５に接合され、他端がバネケース４７の内周面に接合されており、第２のワイヤ部３４ｂを第２のチャンネル３２内に巻き取る回転方向に付勢するように配されている。   Further, the treatment instrument transport mechanism 30 is provided with a ratchet mechanism 40 that winds the operation wire 34, and is provided on a support member 41 that has an opening 41 a and is provided at the base end 32 a of the second channel 32. ing. When the ratchet mechanism 40 is rotated in the A direction, the first rotating member 42 wound around one end of the first wire portion 34a and the one end side of the second wire portion 34b are rotated when rotated in the B direction. The second rotating member 44 to be wound, the supporting shaft 45 that rotatably supports the first rotating member 42 and the second rotating member 44, and is attached to the supporting member 41 so as not to rotate, and the supporting shaft The coil spring 46 disposed on the outer peripheral surface 45 and urged in the direction in which the first rotating member 42 and the second rotating member 44 approach each other, and the second rotating member 44 is urged to rotate in the B direction. The spiral spring 43 is accommodated, and a spring case 47 joined to the second rotating member 44 so as to rotate integrally with the second rotating member 44, and a recess 47a provided along the outer peripheral surface of the spring case 47 Mating and relative to the spring case 47 And a rolling-enabled mobile member 48. In addition, the spiral spring 43 has one end joined to the support shaft 45 and the other end joined to the inner peripheral surface of the spring case 47, so that the second wire portion 34 b is wound in the second channel 32. It is arranged to be energized.

第１の回転部材４２は、第２の回転部材４４に対向する側壁面４２ａに、図５に示すように、孔４２ｂが支軸４５を中心として放射状に等間隔に形成されている（例えば、8個）。また、第２の回転部材４４は、第１の回転部材４２に対向する側壁面４４ａに、この側壁面４４ａに対して傾斜して配された係止爪４４ｂが設けられており、孔４２ｂと係止爪４４ｂとが係合可能となっている。また、第１の回転部材４２は、ストッパ（図示略）により支軸４５に沿うＣ方向の移動が可能であり、Ｄ方向の移動が規制されているため、一定の位置で回転可能となっている。これらにより、第２の回転部材４４が第２のワイヤ部３４ｂを第２のチャンネル３２の基端３２ｂ側から引っ張った際に、第１の回転部材４２が第２の回転部材４４に連動して同一方向に回転する。また、係止爪４４ｂの傾斜角度とコイルスプリング４６の弾性力とが、第２の回転部材４４が第２のワイヤ部３４ｂを巻き取る方向に回転するとき、第２の回転部材４４に対して第１の回転部材４２の同一方向への回転を規制させるように形成されている。すなわち、孔４２ｂ及び係止爪４４ｂは係合部を構成し、これにより、第２の回転部材４４がＡ方向に回転する場合、それに追従して第１の回転部材４２はＡ方向に回転する。一方、第２の回転部材４４がＢ方向に回転する場合、第２の回転部材４４のみがＢ方向に回転し、第１の回転部材４２は回転しないようになっている。   As shown in FIG. 5, the first rotating member 42 has holes 42 b formed radially at equal intervals around the support shaft 45 on the side wall surface 42 a facing the second rotating member 44 (for example, 8). In addition, the second rotating member 44 is provided with a locking claw 44b disposed on the side wall surface 44a facing the first rotating member 42 so as to be inclined with respect to the side wall surface 44a. The locking claw 44b can be engaged. Further, the first rotating member 42 can be moved in the C direction along the support shaft 45 by a stopper (not shown), and the movement in the D direction is restricted. Therefore, the first rotating member 42 can be rotated at a fixed position. Yes. Accordingly, when the second rotating member 44 pulls the second wire portion 34 b from the base end 32 b side of the second channel 32, the first rotating member 42 is interlocked with the second rotating member 44. Rotate in the same direction. Further, when the second rotating member 44 rotates in the direction in which the second wire member 34 b is wound, the inclination angle of the locking claw 44 b and the elastic force of the coil spring 46 are relative to the second rotating member 44. The first rotation member 42 is formed so as to restrict rotation in the same direction. That is, the hole 42b and the locking claw 44b constitute an engaging portion, whereby when the second rotating member 44 rotates in the A direction, the first rotating member 42 rotates in the A direction following the rotation. . On the other hand, when the second rotating member 44 rotates in the B direction, only the second rotating member 44 rotates in the B direction, and the first rotating member 42 does not rotate.

前記支持部材４１の開口部４１ａの内周面には、一定のリードのめねじ４９が形成されている。また、移動部材４８の外周面には、めねじ４９に螺合するおねじ５０が形成されている。すなわち、移動部材４８をＡ方向に回転させることによって、図６に示すように、第２の回転部材４４がＣ方向に移動して、孔４２ｂと係止爪４４ｂとが係合し、また、移動部材４８をＢ方向に回転させることによって、第２の回転部材４４がＤ方向に移動し、孔４２ｂと係止爪４４ｂとの係合が外れるようになっている。   A fixed lead screw 49 is formed on the inner peripheral surface of the opening 41 a of the support member 41. Further, a male screw 50 that is screwed into the female screw 49 is formed on the outer peripheral surface of the moving member 48. That is, by rotating the moving member 48 in the A direction, as shown in FIG. 6, the second rotating member 44 moves in the C direction, the hole 42b and the locking claw 44b are engaged, By rotating the moving member 48 in the B direction, the second rotating member 44 moves in the D direction, and the engagement between the hole 42b and the locking claw 44b is released.

次に、以上の構成からなる本実施形態の内視鏡の使用方法について、以下に説明する。
まず、内視鏡挿入部１１を体腔内に挿入した後、図４（ａ）に示すように、係合部材３５の切欠け部３５ｂを処置具２０の挿入部２１の先端２１ａに取り付け、図８（Ａ）に示すように、鉗子口１８から第１のチャンネル３１に処置具２０を挿入する。このとき、図８（Ｂ）に示すように、第２の回転部材４４には第２のワイヤ部３４ｂが巻回されている。そして、図９（Ａ）に示すように、操作者が第２のワイヤ部３４ｂのハンドル部３６を第２のチャンネル３２の基端３２ｂ側から外部に引っ張ると、処置具２０の鉗子部２２が先端開口部１２ａから突出する。すなわち、第２の回転部材４４がＡ方向に回転し、この回転に追従して第１の回転部材４２もＡ方向に回転する。これにより、図９（Ｂ）に示すように、第１のワイヤ部３４ａがプーリ３３を介して第１の回転部材４２に巻回されて、第２のワイヤ部３４ｂが第２のチャンネル３２の基端３２ｂ側から外部に露出する。 Next, a method for using the endoscope of the present embodiment configured as described above will be described below.
First, after inserting the endoscope insertion portion 11 into the body cavity, as shown in FIG. 4A, the notch portion 35b of the engaging member 35 is attached to the distal end 21a of the insertion portion 21 of the treatment instrument 20, and FIG. As shown in FIG. 8A, the treatment instrument 20 is inserted into the first channel 31 from the forceps opening 18. At this time, as shown in FIG. 8B, the second wire member 34 b is wound around the second rotating member 44. 9A, when the operator pulls the handle portion 36 of the second wire portion 34b outward from the base end 32b side of the second channel 32, the forceps portion 22 of the treatment instrument 20 is moved. It protrudes from the tip opening 12a. That is, the second rotating member 44 rotates in the A direction, and following this rotation, the first rotating member 42 also rotates in the A direction. As a result, as shown in FIG. 9B, the first wire portion 34 a is wound around the first rotating member 42 via the pulley 33, and the second wire portion 34 b is connected to the second channel 32. It is exposed to the outside from the base end 32b side.

次いで、操作者が手を離すと、うず巻きバネ４３の弾性力により、図１０（Ｂ）に示すように、第２の回転部材４４が第２のワイヤ部３４ｂを巻き取る方向に回転し、図１０（Ａ）に示すように、ハンドル部３６は第２のチャンネル３２の近傍に位置する。この状態で、操作部２３を操作し、鉗子部２２の開閉を行い、体腔内の患部の観察及び処置を行う。進退させるときは、そのまま挿入部２１を操作すれば良く、処置具搬送機構３０の解除などの操作の必要はない。そして、患部等の処置が終了した場合、鉗子部２２を閉じた状態で、移動部材４８をＢ方向に回転させることにより、図１１（Ｂ）に示すように、第２の回転部材４４がＤ方向に移動し、孔４２ｂと係止爪４４ｂとの係合が外される。このように、第１の回転部材４２から第２の回転部材４４を離間させた後、処置具２０を第１のチャンネル３１の基端側から引っ張ると、ラチェット機構４０の係合が解除されているため、第１の回転部材４２のみが回転する。これにより、図１１（Ａ）に示すように、処置具２０が第１のチャンネル３１の基端側に移動し、係合部材３５から処置具２０を外す。   Next, when the operator releases his / her hand, the second rotating member 44 rotates in the direction of winding the second wire portion 34b by the elastic force of the spiral spring 43 as shown in FIG. As shown in FIG. 10A, the handle portion 36 is located in the vicinity of the second channel 32. In this state, the operation part 23 is operated, the forceps part 22 is opened and closed, and the affected part in the body cavity is observed and treated. When advancing and retracting, the insertion portion 21 may be operated as it is, and there is no need for operations such as releasing the treatment instrument transport mechanism 30. When the treatment of the affected area or the like is completed, the second rotating member 44 is moved to D as shown in FIG. 11B by rotating the moving member 48 in the B direction with the forceps 22 closed. The engagement between the hole 42b and the locking claw 44b is released. As described above, when the treatment tool 20 is pulled from the proximal end side of the first channel 31 after the second rotation member 44 is separated from the first rotation member 42, the engagement of the ratchet mechanism 40 is released. Therefore, only the first rotating member 42 rotates. As a result, as shown in FIG. 11A, the treatment instrument 20 moves to the proximal end side of the first channel 31 and removes the treatment instrument 20 from the engagement member 35.

すなわち、本実施形態に係る内視鏡１によれば、処置具搬送機構３０を備えることにより、処置具２０を先端開口部１２ａへ搬送させる際、従来のようにモータや制御部などの装置を備える必要がなくなり、簡易な構成で、容易に第１のチャンネル３１の内視鏡先端部１２側に処置具２０を挿抜させることができる。また、ラチェット機構４０を備えることにより、第２のワイヤ部３４ｂを第２のチャンネル３２の基端３２ａ側へ引っ張る際に、第２のワイヤ部３４ｂが第２のチャンネル３２内に戻され第２の回転部材４４に巻回される。これによって、第２のチャンネル３２から露出する第２のワイヤ部３４ｂが短くなり、操作性の向上を図ることができる。   That is, according to the endoscope 1 according to the present embodiment, when the treatment instrument 20 is conveyed to the distal end opening portion 12a by providing the treatment instrument conveyance mechanism 30, devices such as a motor and a control unit are conventionally used. The treatment instrument 20 can be easily inserted into and removed from the endoscope distal end 12 side of the first channel 31 with a simple configuration. Further, by providing the ratchet mechanism 40, when the second wire portion 34b is pulled toward the proximal end 32a side of the second channel 32, the second wire portion 34b is returned into the second channel 32 and is second The rotating member 44 is wound around. As a result, the second wire portion 34b exposed from the second channel 32 is shortened, and operability can be improved.

次に、本発明の第２実施形態に係る内視鏡用挿抜装置について図１２から図１４を参照して説明する。なお、以下に説明する各実施形態において、上述した第１実施形態に係る内視鏡１と構成を共通とする箇所には同一符号を付けて、説明を省略することにする。
本実施形態に係る内視鏡用挿抜装置６０において、第１実施形態と異なる点は、内視鏡１として内視鏡挿入部１１の内部に第１のチャンネル３１と、第２のチャンネル３２とを設けたが、これに代えて、鉗子チャンネル６１を備えた内視鏡７０に着脱可能な点である。 Next, an endoscope insertion / extraction device according to a second embodiment of the present invention will be described with reference to FIGS. In each embodiment described below, portions having the same configuration as those of the endoscope 1 according to the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.
In the endoscope insertion / extraction apparatus 60 according to the present embodiment, the difference from the first embodiment is that the endoscope 1 has a first channel 31 and a second channel 32 inside the endoscope insertion portion 11. However, instead of this, it is detachable from the endoscope 70 having the forceps channel 61.

本実施形態に係る内視鏡用挿抜装置６０は、図１２及び図１３に示すように、内視鏡７０に取り付けて内視鏡７０に形成された鉗子チャンネル６１内で処置具２０を進退させるものであり、内視鏡先端部１２に着脱可能とされたフード６４と、このフード６４に回転自在に設けられたプーリ６２と、このプーリ６２に巻回されて鉗子チャンネル６１内に折り返して配された操作ワイヤ６３と、鉗子チャンネル６１に挿通された鉗子口１８に設けられた鉗子栓６５に着脱可能に設けられた固定部材６６と、フード６４に先端が固定されているとともに固定部材６６に基端側が固定され、鉗子チャンネル６１先端で折り返えされたハンドル部３６側の操作ワイヤ６３を挿通させる挿通管６７とを備えている。また、フード６４はパイプ状部材になっており、鉗子部２２は挿通孔６４ａから外部へ突出可能となっている。   As shown in FIGS. 12 and 13, the endoscope insertion / extraction device 60 according to the present embodiment is attached to the endoscope 70 and advances and retracts the treatment instrument 20 in a forceps channel 61 formed in the endoscope 70. A hood 64 that is attachable to and detachable from the endoscope distal end portion 12, a pulley 62 that is rotatably provided on the hood 64, and is wound around the pulley 62 and folded back into the forceps channel 61. The distal end of the operation wire 63 is fixed to the forceps plug 65 provided in the forceps port 18 inserted through the forceps channel 61 and the hood 64 is fixed to the fixing member 66. The proximal end side is fixed, and an insertion tube 67 is provided through which the operation wire 63 on the handle portion 36 side folded back at the distal end of the forceps channel 61 is inserted. Further, the hood 64 is a pipe-like member, and the forceps 22 can protrude outward from the insertion hole 64a.

前記操作ワイヤ６３は、一端に設けられ処置具２０の先端側を取り付け可能で鉗子チャンネル６１内に挿通可能な係合部材３５と、他端に設けられ鉗子チャンネル１０の基端側から外部に配されたハンドル部（処置具進退操作部）３６とを備えている。
前記固定部材６６には、処置具２０を支持する支持台６８が設けられている。この支持台６８には、図１４に示すように、処置具２０の鉗子部２２を載置する凹部６８ａと、挿入部２１をスライド可能なレール６８ｂとが形成されている。 The operation wire 63 is provided at one end, can be attached to the distal end side of the treatment instrument 20 and can be inserted into the forceps channel 61, and is provided at the other end from the proximal end side of the forceps channel 10 to the outside. And a handle portion (treatment tool advancing / retreating operation portion) 36 is provided.
The fixing member 66 is provided with a support base 68 that supports the treatment instrument 20. As shown in FIG. 14, the support base 68 is formed with a recess 68a for placing the forceps 22 of the treatment instrument 20 and a rail 68b on which the insertion portion 21 can be slid.

次に、以上の構成からなる本実施形態の内視鏡用挿抜装置６０の使用方法について、以下に説明する。
まず、内視鏡先端部１２にフード６４を、鉗子栓６５に固定部材６６をそれぞれ取り付け、係合部材３５を支持台６８に設置し、挿通管６７を内視鏡先端部１２に粘着テープなどで、ところどころ固定して、内視鏡７０の挿入部１１を体腔内に挿入する。挿入した後、挿入部２１をレール６８ｂに嵌め込む。この状態で、係合部材３５の切欠け部３５ｂを処置具２０の挿入部２１の先端２１ａに取り付ける。そして、ハンドル部３６を鉗子チャンネル６１の鉗子口１８から外部に引っ張る。これにより、操作ワイヤ６３がプーリ６２に巻回されて、操作ワイヤ６３は挿通管６７内から固定部材６６側へ移動され、この操作ワイヤ６３の移動に伴い処置具２０が内視鏡先端部１２方向に移動され、鉗子部２２を内視鏡先端部１２から突出させる。
次に、患部等の処置が終了した場合、処置具２０を鉗子口１８側から外部へ引っ張ることにより、操作ワイヤ６３はプーリ６２を介して鉗子口１８側へ移動される。これによって、処置具２０が固定部材６６まで移動され、処置具２０を支持台６８に支持し、係合部材３５から処置具を外す。 Next, a method of using the endoscope insertion / extraction apparatus 60 of the present embodiment having the above configuration will be described below.
First, the hood 64 is attached to the endoscope distal end portion 12, the fixing member 66 is attached to the forceps plug 65, the engaging member 35 is installed on the support base 68, and the insertion tube 67 is attached to the endoscope distal end portion 12 with an adhesive tape or the like. Thus, it is fixed in some places and the insertion part 11 of the endoscope 70 is inserted into the body cavity. After the insertion, the insertion portion 21 is fitted into the rail 68b. In this state, the cutout portion 35b of the engagement member 35 is attached to the distal end 21a of the insertion portion 21 of the treatment instrument 20. Then, the handle portion 36 is pulled outside from the forceps opening 18 of the forceps channel 61. As a result, the operation wire 63 is wound around the pulley 62, and the operation wire 63 is moved from the insertion tube 67 toward the fixing member 66, and the treatment instrument 20 is moved along the distal end portion 12 of the endoscope as the operation wire 63 moves. The forceps 22 is moved from the endoscope distal end 12.
Next, when the treatment of the affected part or the like is completed, the operation wire 63 is moved to the forceps port 18 side via the pulley 62 by pulling the treatment tool 20 from the forceps port 18 side to the outside. As a result, the treatment instrument 20 is moved to the fixing member 66, the treatment instrument 20 is supported by the support base 68, and the treatment instrument is removed from the engagement member 35.

すなわち、本実施形態に係る内視鏡用挿抜装置６０によれば、プーリ６２を介して処置具２０が鉗子チャンネル６１の先端側へ搬送することが可能となる。また、内視鏡７０に内視鏡用挿抜装置６０を取り付けることにより、簡単に処置具２０の搬送を可能とする内視鏡にすることができる。また、固定部材６６に支持台６８が設けられているので、係合部材３５に処置具２０を着脱する際、支持台６８に係合部材３５を支持しながら作業を行うことができる。したがって、処置具３０の着脱作業が容易になるため、着脱時間の短縮化を図ることが可能となる。   That is, according to the endoscope insertion / extraction device 60 according to the present embodiment, the treatment tool 20 can be conveyed to the distal end side of the forceps channel 61 via the pulley 62. In addition, by attaching the endoscope insertion / extraction device 60 to the endoscope 70, the endoscope can be easily transported. In addition, since the support member 68 is provided on the fixing member 66, when the treatment tool 20 is attached to and detached from the engagement member 35, the work can be performed while the engagement member 35 is supported on the support table 68. Therefore, since the attaching / detaching operation of the treatment instrument 30 becomes easy, the attaching / detaching time can be shortened.

なお、本実施形態において、固定部材３５を鉗子栓６５に着脱可能とさせたが、これに代えて、鉗子栓６５近傍であれば良く、例えば、操作部１４に着脱可能とさせても良い。また、上記各実施形態において、処置具２０として鉗子部２２を用いたが、これに限るものではなく、例えば、スネア等のようなものでも構わない。
また、本発明の技術範囲は上記各実施の形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。 In the present embodiment, the fixing member 35 can be attached to and detached from the forceps plug 65. However, instead of this, the fixing member 35 may be in the vicinity of the forceps plug 65, and may be attachable to and detachable from the operation unit 14, for example. Moreover, in each said embodiment, although the forceps part 22 was used as the treatment tool 20, it is not restricted to this, For example, things, such as a snare, may be sufficient.
The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

本発明の第１実施形態に係る内視鏡を示す平面図である。1 is a plan view showing an endoscope according to a first embodiment of the present invention. 本発明の第１実施形態に係る内視鏡を示す平面図である。1 is a plan view showing an endoscope according to a first embodiment of the present invention. 図１の内視鏡の（ａ）は先端部を示す断面図であり、（ｂ）は鉗子口側の第１，２のチャンネルを示す要部断面図である。(A) of the endoscope of FIG. 1 is a cross-sectional view showing a distal end portion, and (b) is a cross-sectional view of a main part showing first and second channels on the forceps opening side. 本発明の第１実施形態に係る内視鏡の係合部材に処置具を装着した状態を示す（ａ）は側面図であり、（ｂ）は平面図である。BRIEF DESCRIPTION OF THE DRAWINGS (a) which shows the state which attached the treatment tool to the engaging member of the endoscope which concerns on 1st Embodiment of this invention is a side view, (b) is a top view. 本発明の第１実施形態に係る内視鏡のラチェット機構を示す斜視図である。It is a perspective view which shows the ratchet mechanism of the endoscope which concerns on 1st Embodiment of this invention. 図５のラチェット機構を示す要部断面図である。It is principal part sectional drawing which shows the ratchet mechanism of FIG. 図５のラチェット機構のバネケースを示す側面図である。It is a side view which shows the spring case of the ratchet mechanism of FIG. 本発明の第１実施形態に係る内視鏡を示す（ａ）は平面図であり、（ｂ）はラチェット機構を示す平面図である。BRIEF DESCRIPTION OF THE DRAWINGS (a) which shows the endoscope which concerns on 1st Embodiment of this invention is a top view, (b) is a top view which shows a ratchet mechanism. 本発明の第１実施形態に係る内視鏡を示す（ａ）は平面図であり、（ｂ）はラチェット機構を示す平面図である。BRIEF DESCRIPTION OF THE DRAWINGS (a) which shows the endoscope which concerns on 1st Embodiment of this invention is a top view, (b) is a top view which shows a ratchet mechanism. 本発明の第１実施形態に係る内視鏡を示す（ａ）は平面図であり、（ｂ）はラチェット機構を示す平面図である。BRIEF DESCRIPTION OF THE DRAWINGS (a) which shows the endoscope which concerns on 1st Embodiment of this invention is a top view, (b) is a top view which shows a ratchet mechanism. 本発明の第１実施形態に係る内視鏡を示す（ａ）は平面図であり、（ｂ）はラチェット機構を示す平面図である。BRIEF DESCRIPTION OF THE DRAWINGS (a) which shows the endoscope which concerns on 1st Embodiment of this invention is a top view, (b) is a top view which shows a ratchet mechanism. 本発明の第２実施形態に係る内視鏡用挿抜装置を示す平面図である。It is a top view which shows the insertion / extraction apparatus for endoscopes which concerns on 2nd Embodiment of this invention. 図１２の内視鏡用挿抜装置を内視鏡に装着した状態を示す要部断面図である。It is principal part sectional drawing which shows the state which mounted | wore the endoscope with the insertion / extraction apparatus for endoscopes of FIG. 図１２の支持台を示す拡大斜視図である。It is an expansion perspective view which shows the support stand of FIG.

符号の説明Explanation of symbols

１，７０ 内視鏡
１１ 挿入部
１４ 内視鏡操作部（操作部）
１２ａ 先端開口部
１８ 鉗子口
２０ 処置具
２１ 可動部
３１ 第１のチャンネル
３２ 第２のチャンネル
３２ａ 第２のチャンネルの基端
３４，６３ 操作ワイヤ
３４ａ 第１のワイヤ部
３４ｂ 第２のワイヤ部
３５ 係合部材
３６ ハンドル部（処置具進退操作部）
４２ 第１の回転部材
４４ 第２の回転部材
４２ｂ 孔（係止部）
４４ｂ 係止爪（係止部）
６０ 内視鏡用挿抜装置
６４ フード
６５ 鉗子栓
６６ 固定部材
６７ 挿通管
６８ 支持台 1,70 Endoscope 11 Insertion Unit 14 Endoscope Operation Unit (Operation Unit)
12a distal end opening 18 forceps opening 20 treatment tool 21 movable portion 31 first channel 32 second channel 32a second channel proximal end 34, 63 operation wire 34a first wire portion 34b second wire portion 35 Joint member 36 Handle part (procedure instrument advance / retreat operation part)
42 1st rotation member 44 2nd rotation member 42b Hole (locking part)
44b Locking claw (locking part)
60 Endoscope insertion / removal device 64 Hood 65 Forceps stopper 66 Fixing member 67 Insertion tube 68 Support base

Claims (4)

体腔内に挿入される挿入部と、該挿入部を操作するための操作部と、
一端が前記挿入部の先端に開口する先端開口部を有するとともに、他端が前記操作部の近傍に開口する鉗子口に接続される第１のチャンネルと、
該第１のチャンネルに挿入される処置具とを備えた内視鏡において、
前記鉗子口の近傍から前記挿入部の先端にかけて設けた第２のチャンネルと、
該第２のチャンネルの基端から挿入され、前記挿入部の先端で折り返され前記第１のチャンネルに挿入される操作ワイヤと、
該操作ワイヤの先端に設けられ、前記処置具の先端近傍に係合される係合部材と、
前記操作ワイヤの基端に設けられた処置具進退操作部とを備えることを特徴とする内視鏡。 An insertion part to be inserted into the body cavity, an operation part for operating the insertion part,
A first channel having one end opened at the distal end of the insertion portion and the other end connected to a forceps opening opened near the operation portion;
In an endoscope provided with a treatment instrument inserted into the first channel,
A second channel provided from the vicinity of the forceps opening to the distal end of the insertion portion;
An operation wire inserted from the proximal end of the second channel, folded at the distal end of the insertion portion, and inserted into the first channel;
An engagement member provided at the distal end of the operation wire and engaged in the vicinity of the distal end of the treatment instrument;
An endoscope comprising a treatment instrument advancing / retreating operation unit provided at a proximal end of the operation wire. 前記操作ワイヤが、前記係合部材を有する第１のワイヤ部と前記処置具進退操作部を有する第２のワイヤ部とに分かれ、
前記第１のワイヤ部の基端側が巻回される第１の回転部材と、
前記第２のワイヤ部の先端側が巻回され、前記第２のワイヤ部を前記第２のチャンネル内に巻き取る回転方向に付勢する第２の回転部材と、
該第２の回転部材が前記第２のワイヤ部を前記第２のチャンネルの基端側から引っ張った際に、前記第１の回転部材が前記第２の回転部材に連動して同一方向に回転し、前記第２の回転部材が前記第２のワイヤ部を巻き取る方向に回転するときは、前記第１の回転部材の同一方向への回転を規制させる係止部とを備えていることを特徴とする請求項１に記載の内視鏡。 The operation wire is divided into a first wire portion having the engagement member and a second wire portion having the treatment instrument advancing / retreating operation portion,
A first rotating member around which a proximal end side of the first wire portion is wound;
A second rotating member that is wound around a distal end side of the second wire portion and urges the second wire portion in a rotating direction to wind the second wire portion into the second channel;
When the second rotating member pulls the second wire portion from the proximal end side of the second channel, the first rotating member rotates in the same direction in conjunction with the second rotating member. And when the said 2nd rotation member rotates in the direction which winds up the said 2nd wire part, it is provided with the latching | locking part which controls the rotation to the same direction of the said 1st rotation member. The endoscope according to claim 1, wherein the endoscope is characterized in that: 内視鏡に形成された鉗子チャンネル内で処置具を進退させる内視鏡用処置具挿抜装置において、
前記内視鏡の先端部に着脱可能とされたフードと、
前記鉗子チャンネルの基端から挿入され、前記フードで折り返され前記鉗子チャンネルに挿入される操作ワイヤと、
該操作ワイヤの先端に設けられた前記処置具の先端近傍に係合される係合部材と、
前記操作ワイヤの基端に設けられた処置具進退操作部と、
前記鉗子チャンネルに挿通された鉗子口に設けられた鉗子栓または鉗子栓近傍に着脱可能に設けられた固定部材と、
前記フードに先端が固定されているとともに前記固定部材に基端側が固定され、前記鉗子チャンネル先端で折り返えされた前記処置具進退操作部側の前記操作ワイヤを挿通させる挿通管とを備えていることを特徴とする内視鏡用処置具挿抜装置。 In an endoscope treatment tool insertion / extraction device for advancing / retreating a treatment tool in a forceps channel formed in an endoscope,
A hood capable of being attached to and detached from the distal end of the endoscope;
An operation wire inserted from the proximal end of the forceps channel, folded back by the hood and inserted into the forceps channel;
An engaging member engaged in the vicinity of the distal end of the treatment instrument provided at the distal end of the operation wire;
A treatment instrument advancing / retreating operation portion provided at a proximal end of the operation wire;
A forceps plug provided at a forceps port inserted through the forceps channel or a fixing member provided detachably near the forceps plug;
A distal end fixed to the hood, a proximal end fixed to the fixing member, and an insertion tube through which the operation wire on the treatment instrument advancing / retreating portion side folded back at the distal end of the forceps channel is inserted. An endoscopic treatment instrument insertion / extraction device. 前記固定部材に、前記係合部材に前記処置具を取り付ける際、前記処置具を支持する支持台が設けられていることを特徴とする請求項３に記載の内視鏡用処置具挿抜装置。   The endoscope treatment instrument insertion / extraction apparatus according to claim 3, wherein when the treatment tool is attached to the engagement member, the support member is provided on the fixing member to support the treatment tool.

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