JP2005211126A - Inserting and detaching member for treating instrument, treating instrument provided with the same, and endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inserting and detaching member for a treatment instrument for enabling the operator of an endoscope to operate the treating instrument as well, and the endoscope provided with the same. <P>SOLUTION: The inserting and detaching member 1 for the treating instrument comprises a first shaft member 5 and second shaft member 6 arranged side by side, inserted into and detached from the forceps channel 3 of the endoscope 2 and having flexibility, a first operation part 7 for moving the first shaft member 5 forwards and backwards, and a second operation part 8 for moving the second shaft member 5 forwards and backwards. A forceps part (treating instrument tip part) 10 operable by the forward and backward movement operation to the first shaft member 5 of the second shaft member 6 is connected to the tip of the first shaft member 5 to constitute forceps (treating instrument) A together with the inserting and detaching member 1 for the treating instrument. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a treatment instrument insertion / extraction member, a treatment instrument including the same, and an endoscope.

When a treatment is performed by directly inserting the treatment tool into the body cavity, the treatment portion disposed at the distal ends of the stationary portion and the movable portion that can be moved in parallel with respect to the stationary portion is disposed with respect to the stationary portion. The treatment tool operated by moving is used (for example, refer patent document 1).
When performing treatment by inserting the treatment instrument into the forceps channel of the endoscope, the operation tube portion is inserted into the forceps channel of the endoscope and the operation portion connected to the proximal end of the operation tube portion is operated. The treatment is performed by operating the treatment section connected to the distal end (see, for example, Patent Document 2).
European Patent No. 0706780A2 (FIG. 1) JP 11-76244 A (FIG. 1)

However, in the above-described conventional technique, when the treatment instrument is inserted into the forceps channel and the operation tube is lengthened so that the treatment tool can be sufficiently advanced and retracted in the channel, the operation unit can be removed from the forceps opening of the endoscope. Since it was placed in a position far away, when operating this, another operator who is away from the operator (the operator of the endoscope) must operate, When the surgeon performs a procedure, the operator's intention is not easily transmitted to the operator of the treatment tool.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a treatment instrument insertion / extraction member that allows an operator of an endoscope to also operate a treatment instrument, a treatment instrument including the treatment instrument, and an endoscope. To do.

The present invention employs the following means in order to solve the above problems.
An insertion / extraction member for a treatment instrument according to the present invention includes a first shaft member and a second shaft member that are flexible and can be inserted into and removed from a forceps channel of an endoscope. The distal end of the first shaft member is connected to a treatment instrument distal end portion having a treatment portion that is supplied with a driving force to perform treatment and a treatment portion main body that supports the treatment portion. The distal end portion of the treatment instrument can be operated by an advance / retreat operation of the second shaft member.

  Since this treatment tool insertion / extraction member has the above-described configuration, by operating the first shaft member and the second shaft member together in a state where the distal end portion of the treatment tool is inserted into the forceps channel, The distal end portion of the treatment tool can be moved to a desired position. At this time, the distal end portion of the treatment instrument connected to the distal end of the first shaft member can be operated by operating the second shaft member relative to the first shaft member.

The treatment instrument insertion / extraction member according to the present invention is the treatment instrument insertion / extraction member, wherein the treatment portion main body is detachably connected to the first shaft member, and the treatment portion is attached to the second shaft. The member is detachably connected to the member.
Since this treatment instrument insertion / extraction member has the above-described configuration, it is possible to cope with various types of treatment instrument tip replacement with respect to one treatment instrument insertion / extraction member.

The treatment instrument insertion / extraction member according to the present invention is the treatment instrument insertion / extraction member, wherein the second shaft member is connected to the first shaft member between the first shaft member and the second shaft member. It is preferable that a connecting member is provided for connecting the two so as to be able to advance and retract.
The treatment tool insertion / extraction member has the above-described configuration, and therefore, when the first shaft member is advanced or retracted, the second shaft member is supported so as not to be separated from the first shaft member, and is integrated with the shaft. It can be operated as a member.

The treatment instrument insertion / extraction member according to the present invention is the treatment instrument insertion / extraction member, wherein the first operation portion for advancing / retreating the first shaft member and the second shaft member for the first shaft are provided. A second operating portion that moves forward and backward in the axial direction with respect to the member, the first operating portion is releasably fixed in the middle of the first shaft member, and the second operating portion is It is fixed in the middle of the second shaft member so as to be releasable.
Since this treatment tool insertion / extraction member has the above-described configuration, when the second shaft member is moved in the axial direction with respect to the first shaft member, the first operating portion is moved to the first shaft member. It can be fixed at any upper position, and the second operation portion can be fixed at any position on the second shaft member. Therefore, by moving and fixing the first operation unit and the second operation unit to positions where the operator of the endoscope can easily operate, the person who performs the endoscope operation simultaneously operates the distal end of the treatment instrument. It can be carried out.

The treatment instrument insertion / extraction member according to the present invention is the treatment instrument insertion / extraction member, and the first operation portion is provided with an attachment member formed detachably on the forceps opening of the endoscope. It is characterized by that.
Since the treatment tool insertion / extraction member has the above-described configuration, the first shaft member and the second shaft member are connected to the forceps channel in a state where the first operation portion is connected to the forceps port and fixed. The first shaft member and the first operation portion are fixed, and the second shaft member and the second operation portion are fixed after the distal end of the treatment instrument is positioned at a desired position. Thus, the distal end portion of the treatment instrument can be actuated by operating the second operation portion in a stable state to move the second shaft member forward and backward with respect to the first shaft member.

The treatment instrument according to the present invention includes the treatment instrument insertion / extraction member according to the present invention.
In addition, an endoscope according to the present invention includes the treatment instrument insertion / extraction member according to the present invention, and is in pressure contact with the first shaft member and rotated in the advancing / retreating direction of the first shaft member. And a second rotating member that is in pressure contact with the second shaft member and rotates in the advancing and retracting direction of the second shaft member to advance and retract the second shaft member. It is characterized by that.
Since the treatment tool and the endoscope have the above-described configuration, the first shaft member and the second shaft member are rotated by rotating the first rotating member and the second rotating member together. The advancing / retreating operation of the distal end portion of the treatment instrument can be performed by advancing and retreating both. Further, by rotating only the second rotating member, the second shaft member can be moved forward and backward relative to the first shaft member, and the distal end portion of the treatment instrument can be operated.

An endoscope according to the present invention includes a treatment instrument insertion / extraction member according to the present invention, is connected to a proximal end of the forceps channel, and is capable of winding and delivering the proximal end side of the first shaft member. And a second winding member capable of winding and delivering the proximal end side of the second shaft member.
Since the endoscope has the above-described configuration, the first shaft member and the second shaft member are respectively fed out from the first winding member and the second winding member, thereby allowing the first shaft to be moved. The advance operation of the member and the second shaft member can be performed, and the insertion operation of the distal end portion of the treatment instrument connected to the first shaft member can be performed. Further, the first shaft member and the second shaft member are retracted by winding the first shaft member and the second shaft member around the first winding member and the second winding member, respectively. It is possible to perform an extraction operation of the distal end portion of the treatment instrument connected to the first shaft member.
Furthermore, by feeding or winding only the second shaft member from the second winding member, the second shaft member can be moved forward and backward relative to the first shaft member, and the distal end of the treatment instrument The part can be operated.

The endoscope according to the present invention is the endoscope, wherein the first shaft member and the second shaft member are preferably formed in a band shape.
Since this endoscope has the above-described configuration, the first shaft member can be easily wound around the first winding member, and the second shaft member can be easily wound around the second winding member. . Moreover, it can wind up thinly and can achieve compact storage.

  According to the present invention, the first shaft member and the second shaft member can be advanced and retracted by hand, so that the surgeon can operate the treatment tool together with the operation of the endoscope. Treatment can be performed.

A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the treatment tool insertion / extraction member 1 according to the present embodiment has first flexibility that is flexible and can be inserted into and removed from the forceps channel 3 of the endoscope 2. The shaft member 5, the second shaft member 6, a first operation unit 7 that operates the first shaft member 5 to advance and retreat, and a second operation unit 8 that operates the second shaft member 6 to advance and retract. Yes.
The distal end of the first shaft member 5 is connected to a forceps portion (treatment tool distal end portion) 10 that can be operated by advancing and retracting the second shaft member 6 with respect to the first shaft member 5. A forceps (treatment tool) A is configured together with the member 1.

Between the first shaft member 5 and the second shaft member 6, as shown in FIGS. 3 and 4, a connecting member that connects the second shaft member 6 to the first shaft member 5 so as to be able to advance and retract. 11 is provided, and the second shaft member 6 is supported by the first shaft member 5 so as to freely advance and retract.
The first shaft member 5 and the second shaft member 6 are made of, for example, a resin such as polytetrafluoroethylene, and are connected to the core portion 12 and the core portion 12 that are connected to each other by the connecting member 11. And an umbrella portion 13 formed on the outer peripheral side of each shaft member.

  As shown in FIGS. 1 and 2, the forceps unit 10 has a pair of openable / closable forceps pieces 14, 15 that are supplied with driving force to perform treatment, and a proximal end connected to the distal end of the first shaft member 5. A treatment portion main body 16 that supports the pair of forceps pieces 14, 15, a rod-shaped relay member 17 that is connected to the distal end of the second shaft member 6 and transmits the driving force of the second shaft member 6, and a pair A link mechanism 18 that is connected to the proximal ends of the forceps pieces 14 and 15 and converts the driving force transmitted to the relay member 17 into an opening / closing operation force of the pair of forceps pieces 14 and 15.

As shown in FIGS. 3 and 4, the first operation portion 7 is formed in a tubular shape and is arranged at one end side tubular portion 7 </ b> A and the other end side tubular portion 7 </ b> B that are spaced apart from each other in the axial direction. 7A and the connection part 7C which connects the other end side tubular part 7B. Inside the one end side tubular portion 7A and the other end side tubular portion 7B are formed hole portions 7a into which the umbrella portions 13 of the first shaft member 5 and the second shaft member 6 can be respectively fitted. The first shaft member 5 and the second shaft member 6 are penetrated so as to be able to advance and retreat in a state where the portion 13 and the hole 7a are fitted.
A first screw 20 that penetrates from the outer peripheral surface in the direction of the hole 7a and fixes the first operating portion 7 in the middle of the first shaft member 5 is disposed on the outer peripheral surface of the one end side tubular portion 7A. It is installed.

At the distal end of the first operation unit 7, an attachment member 22 formed to be detachable from the forceps port 21 of the endoscope 2 is disposed. As shown in FIG. 5 (a), the attachment member 22 is formed in a flat plate shape, and a first hole 22A and a second hole 22B and a communication portion 22C that communicates both are formed in the center. As shown in FIGS. 5B and 5C, the first shaft member 5 and the second shaft member 6 connected by the connecting member 11 are connected to each other between the first hole 22A and the second hole 22B. It is communicatively connected between them. The first hole 22A has an outer diameter through which the forceps opening end 21A can be inserted, and the second hole 22B is engageable with the forceps opening main body 21B and smaller than the forceps opening end 21A than the forceps opening main body 21B. Is also formed with a large outer diameter.
The second operation portion 8 is formed in a tubular shape, and a hole portion 8a in which the first shaft member 5, the second shaft member 6, and the connection portion 7C of the first operation portion 7 can be engaged with each other so as to freely advance and retract. Is formed. A second screw 23 for releasably fixing the second operating portion 8 between the one end side tubular portion 7A and the other end side tubular portion 7B in the middle of the second shaft member 6 is provided on the outer peripheral surface. To the hole 8a direction.

Next, a method for operating the insertion / extraction member 1 for the treatment instrument and the forceps A according to the present embodiment, and actions and effects will be described.
First, as shown in FIG. 5 (b), the first hole 22A of the attachment member 22 is engaged with the forceps mouth end 21A and inserted into the forceps mouth body 21B. The attachment member 22 is moved in the direction of the second hole 22B, and the first operation portion 7 and the forceps port 21 are fixed.
Next, the first screw 20 of the first operation unit 7 and the second screw 23 of the second operation unit 8 are loosened, and the hole 7a of the first operation unit 7 and the second operation unit 8 are Both the first shaft member 5 and the second shaft member 6 connected by the connecting member 11 are inserted into the hole portion 8a from the forceps portion 10 side, and are inserted into the forceps channel 3.

While observing with the endoscope 2, the forceps portion 10 is projected from the tip of the forceps channel 3 to a desired position, and then the first screw 20 is tightened to fix the first operation portion 7 to the first shaft member 5. . Then, the second operating portion 8 is moved to the position on the other end side tubular portion 7 </ b> B side, and the second screw 23 is tightened to fix the second operating portion 8 to the second shaft member 6.
Thus, when the second operation portion 8 is advanced toward the one end side tubular portion 7A on the connecting portion 7C, the second shaft member 6 is advanced relative to the first shaft member 5, and the relay member 17 is treated. The pair of forceps pieces 14 and 15 are opened by moving forward with respect to the main body 16 and operating the link mechanism 18, and the pair of forceps pieces 14 and 15 are moved backward by moving the second operation portion 8 toward the other end side tubular portion 7B. 15 is closed.

According to the treatment tool insertion / extraction member 1, the first shaft member 5 and the second shaft member 6 in a state where the forceps portion 10 is inserted into the forceps channel 3 together with the first shaft member 5 and the second shaft member 6. The forceps unit 10 connected to the tip can be moved to a desired position by performing the advance / retreat operation together with the. At this time, the pair of forceps pieces 14 and 15 connected to the distal end of the first shaft member can be opened and closed by moving the second shaft member 6 forward and backward relative to the first shaft member 5. it can.
In addition, the first operation unit 7 can be fixed to an arbitrary position on the first shaft member 5 by the first screw 20, and the second operation unit 8 can be fixed to an arbitrary position on the second shaft member 6. The position can be fixed by the second screw 23. Therefore, the operator who operates the endoscope 2 moves and fixes the first operation unit 7 and the second operation unit 8 to positions where they can be easily operated, so that the operator who performs the endoscope operation can make a pair of forceps pieces 14. , 15 can be performed simultaneously.

In particular, by connecting the first operating portion 7 to the forceps port 21 with the attachment member 22, the second operating portion 8 can be operated in a stable state to open and close the pair of forceps pieces 14 and 15. it can.
Further, when the first shaft member 5 is moved forward and backward by the connecting member 11, the second shaft member 6 can be supported so as not to be separated from the first shaft member 5 and can be operated as an integral shaft member. .

Next, a second embodiment according to the present invention will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the component similar to 1st Embodiment mentioned above, and description is abbreviate | omitted.
The difference between the second embodiment and the first embodiment is that the treatment instrument insertion / extraction member 1 according to the first embodiment includes a first operation section 7 and a second operation section 8. The treatment tool insertion / extraction member 25 according to the second embodiment is provided in an endoscope 26, and the first shaft member 5 and the second shaft member 6 are advanced and retracted by an automatic insertion / extraction portion 27 of the endoscope 26. It is a point to be operated.

  That is, the endoscope 26 includes a flexible insertion portion 28 in which the forceps channel 3 is formed, and a forceps channel 3 that is connected to the proximal end side of the insertion portion 28 and has an insertion portion. An endoscope operation section 29 for bending the distal end of 28, a treatment instrument insertion / extraction member 25 that can be moved forward and backward in the forceps channel 3, and a treatment instrument insertion / extraction connected to the proximal end side of the endoscope operation section 29. An automatic insertion / extraction part 27 for advancing / retracting the member 25 and a storage part 30 that can accommodate the treatment tool insertion / extraction member 25 and that is connected to the base end side of the automatic insertion / extraction part 27 are provided.

The treatment instrument insertion / extraction member 25 includes a first shaft member 5 and a second shaft member 6 similar to those of the first embodiment, and a forceps portion 10 is connected to a distal end of the first shaft member 5. .
As for the 1st shaft member 5 and the 2nd shaft member 6, the base end side is made into the state accommodated in the accommodating part 30 previously.
The automatic insertion / extraction part 27 is in pressure contact with the first shaft member 5 on the outer peripheral surface, rotates in the forward / backward direction of the first shaft member 5, and advances and retracts the first shaft member 5; A second rotating member 32 that is pressed against the shaft member 6 on the outer peripheral surface and rotates in the advancing and retracting direction of the second shaft member 6, and the first rotating member 31 is driven to rotate. A first drive unit 33 made of a motor and a second drive unit 35 made of a motor for rotating the second rotating member 32 are provided. The first rotating member 31 and the second rotating member 32 are disposed between the first shaft member 5 and the second shaft member 6 so as to face each other.
The endoscope operation unit 29 is provided with a first switch 36 for driving the first drive unit 33 and a second switch 37 for driving the second drive unit 35. The first switch 36 is configured to be capable of rotating the first rotating member and switching the rotation direction, and the second switch 37 can perform the same operation independently of the first switch 36. It is configured.

Next, an operation method, an operation and an effect of the endoscope 26 according to the present embodiment will be described.
First, after the insertion portion 28 is inserted into the body cavity, the first switch 36 and the second switch 37 are operated to drive the first drive portion 33 and the second drive portion 35, and the first shaft member The first rotating member 31 and the second rotating member 32 are rotated in the direction in which the 5 and the second shaft member 6 are fed in the direction toward the distal end of the forceps channel 3. At this time, the first shaft member 5 press-contacted to the first rotating member 31 and the second shaft member 6 press-contacted to the second rotating member 32 are sent out from the storage unit 30 and together with the forceps unit 10. It is inserted into the forceps channel 3.
After the forceps portion 10 is protruded from the tip of the forceps channel 3 to a desired position, the first switch 36 and the second switch 37 are operated to stop the first drive portion 33 and the second drive portion 35, The rotation of the first rotating member and the second rotating member 32 is stopped.

When the pair of forceps pieces 14 and 15 are opened, the second switch 37 is operated to drive the second drive unit 35 so that only the second shaft member 6 is moved to the distal end side of the forceps channel 3. The second rotating member 32 is rotated. At this time, the second shaft member 6 further advances with respect to the first shaft member 5, and the pair of forceps pieces 14 and 15 are opened as in the first embodiment.
When closing the pair of forceps pieces 14 and 15, the second switch 37 is operated to drive only the second drive unit 35, and the second shaft member 6 is moved to the proximal side of the forceps channel 3. The second rotating member 32 is rotated in the direction to move. At this time, the second shaft member 6 moves backward with respect to the first shaft member 5 and the pair of forceps pieces 14 and 15 are closed.
When the forceps portion 10 is pulled into the forceps channel 3 again, the first shaft member 5 and the second shaft member 5 are rotated by rotating both the first rotating member 31 and the second rotating member 32 in the direction opposite to that during insertion. The shaft member 6 is pulled in the direction of the storage portion 30.

  The endoscope 26 rotates the first rotating member 31 and the second rotating member 32 to advance and retract the second shaft member 6 and the forceps unit 10 together with the first shaft member 5. By rotating only the second rotating member 32, the second shaft member 6 can be advanced and retracted to open and close the pair of forceps pieces 14 and 15.

Next, a third embodiment according to the present invention will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the component similar to embodiment mentioned above, and description is abbreviate | omitted.
The difference between the third embodiment and the second embodiment is that, in the second embodiment, the first rotating member 31 that advances and retracts the first shaft member 5 and the second shaft member 6 that advances and retracts. However, in the third embodiment, the first winding member 40 for moving the first shaft member 38 back and forth and the second shaft member 41 are moved back and forth. The automatic insertion / extraction part 43 which has the 2nd winding member 42 to be made is provided.

That is, the endoscope 45 according to the present embodiment includes the insertion unit 28 and the endoscope operation unit 29 as in the case of the endoscope 26 according to the second embodiment. The first shaft member 38 and the second shaft member 41 of the treatment instrument insertion / extraction member 46 are made of, for example, a stainless steel strip-shaped thin plate. A resin may be used as long as it has a predetermined strength.
The first shaft member 38 is provided with a support portion 48 that can fix the forceps portion 47 to the tip, and a connecting member 50 that connects the second shaft member 41 so as to be able to advance and retract.
The support portion 48 is composed of two ring-shaped members 51A and 51B separated by a predetermined interval. The ring-shaped member 51A is formed with a notch 51a having a size into which an operation tube 53 described later can be inserted. The ring-shaped member 51B is formed with a notch 51b having a size capable of inserting a connecting plate 55a described later.

The forceps 47 includes an operation tube 53 in which the relay member 52 is connected to the proximal ends of the pair of forceps pieces 14 and 15, and an operation wire 55 that is arranged inside the operation tube 53 and connected to the link mechanism 18. And a connection plate 55a connected to the base end of the operation wire 55. The length of the relay member 52 is determined according to the protruding length of the forceps 47 from the distal end of the forceps channel 3. That is, even if the forceps 47 is protruded from the distal end of the forceps channel 3, the distal ends of the first shaft member 38 and the second shaft member 40 do not protrude outward.
At the base end of the operation tube 53, a flange portion 53A having a thickness that can be inserted between the ring-shaped members 51A and 51B is formed.
The connecting plate 55a is formed in a flat plate shape, and a long hole 56 that is long in the width direction is formed.
A protruding portion 57 that can be engaged with the long hole 56 is formed at the tip of the second shaft member 41. The protruding portion 57 includes a head portion 58 that can penetrate the elongated hole 56, and the head portion 58 is formed in a shape that is long in the length direction of the second shaft member 41.
The forceps 47 can be attached to the first shaft member 38 and the second shaft member 41 by an attachment portion 59 including a support portion 48, a protruding portion 57, and a head portion 58.

The automatic insertion / extraction section 43 for advancing / retreating the treatment instrument insertion / extraction member 46 includes a first winding member 40 capable of winding and feeding the proximal end side of the first shaft member 38 and a proximal end of the second shaft member 41. A second winding member 42 capable of winding and feeding the side, a first drive unit 33 that rotationally drives the first winding member 40, and a rotation operation unit that rotates the second winding member 42 60.
The first winding member 40 is formed in a disk shape, and the first shaft member 38 is wound around the outer peripheral surface. The first winding member 40 is connected to the first drive unit 33, and the rotation is controlled by the first switch 36.
The second winding member 42 includes a winding body 61 formed in a disc shape, and a gear portion 62 that is coaxially connected to the central axis of the winding body 61. The take-up body 61 is rotatably disposed so as to face the first take-up member 40 with the first shaft member 38 and the second shaft member 41 interposed therebetween. 1 is wound in the opposite direction to the shaft member.

The gear part 62 is formed in a disk shape, and a tooth part 63 is formed in the circumferential direction of the entire outer peripheral surface.
The rotation operation part 60 is formed to be engageable with the tooth part 63 and extends in a tangential direction of the gear part 62, a shaft part 66 that is connected to the engagement part 65 and advances and retracts in the tangential direction, And a coiled spring portion 67 engaged with the outer peripheral surface of the shaft portion 66.
That is, the tip end of the shaft portion 66 is arranged to protrude outside the automatic insertion / extraction portion 43, and the spring portion 67 is contracted by moving the shaft portion 66 in the automatic insertion / extraction portion 43 in the axial direction, The tooth portion 63 of the gear portion 62 is engaged, and the engagement is released by moving in the opposite direction. In a state where nothing is done, the engagement is maintained by the force of the spring portion 67.
The endoscope operation portion 29 is formed with an opening 68 that is communicated in the middle of the forceps channel 3 and that allows the forceps portion 47 to be attached to and detached from the attachment portion 59.

Next, an operation method and an operation / effect of the endoscope 45 according to the present embodiment will be described.
First, by operating the first switch 36 to drive the first drive unit 33 and rotating the first winding member 40 in the direction of feeding the first shaft member 38 to the distal end side of the forceps channel 3, The first shaft member 38 wound around the one winding member 40 is sent out in the distal direction of the forceps channel 3. At this time, since the second shaft member 41 is connected to the first shaft member 38 by the connecting member 50, the second shaft member 41 together with the first shaft member 38 moves from the winding body 61 to the distal end of the forceps channel 3. Sent out in the direction.

  The first drive unit 33 is stopped in a state where the tips of the first shaft member 38 and the second shaft member 41 are sent to the opening 68. Then, the forceps portion 47 is attached to the attachment portion 59. At this time, the projecting portion 57 of the second shaft member 41 is inserted into the elongated hole 56 at the proximal end of the operation wire 55 so as to approach the width direction of the second shaft member 41, and in the axial direction of the second shaft member 41. The entire forceps 47 is rotated 90 degrees to engage with each other. Further, the flange portion 53A of the operation tube 53 is inserted between the ring-shaped member 51A and the ring-shaped member 51B and engaged with the first shaft member 38.

Then, after inserting the insertion portion 28 into the body cavity, the first switch 36 is operated to drive the first driving portion 33 to rotationally drive the first winding member 40, and the first shaft member 38, The second shaft member 41 and the forceps portion 47 are inserted into the forceps channel 3.
The first drive unit 33 is driven again to move the first shaft member 38. At this time, since the second shaft member 41 is connected to the first shaft member 38 also by the forceps portion 47, the second shaft member 41 is fed out together with the first shaft member 38 toward the distal end of the forceps channel 3. .
After the distal end of the forceps portion 47 protrudes from the forceps channel 3 to a desired position, the first drive portion 33 is stopped.
When opening the pair of forceps pieces 14, 15, the shaft portion 66 is pushed into the automatic insertion / extraction portion 43. At this time, the spring portion 67 is contracted and the engaging portion 65 is engaged with the tooth portion 63 of the gear portion 62. At this time, the winding main body 61 rotates in the direction in which the second shaft member 41 is sent out, and the pair of forceps pieces 14 and 15 are opened.
Further, by releasing the spring force of the spring portion 67, the shaft portion 66 is returned to the outside of the automatic insertion / extraction portion 43, and at the same time, the winding main body 61 rotates in the direction of winding the second shaft member 41, and The forceps pieces 14 and 15 are closed, and the engaging portion 65 and the gear portion 62 are separated.
When the first shaft member 38 and the second shaft member 41 are wound, the first shaft member 38 is rotated in the direction opposite to that when the first winding member 40 is fed, whereby the first shaft member 38 is The second shaft member 41 is wound around the second winding member 42.

According to the endoscope 45, the first shaft member 38 and the second shaft member 41 are wound around the first winding member 40 and the second winding member 42, respectively. 38 and the second shaft member 41 can be retracted and retracted. Further, the forceps 47 can be advanced by feeding the first shaft member out of the first winding member, and only the second winding member 42 is operated to wind up the second shaft member 41 and By feeding it out, the forceps 47 can be actuated.
In addition, since the first shaft member 38 and the second shaft member 41 are formed of strip-shaped thin plates, the first shaft member 38 is used as the first winding member 40, and the second shaft member 41 is used. Each can be easily wound around the second winding member 42. At this time, each winding member can be thinly wound, and compact storage can be achieved without separately providing a storage portion.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the second embodiment, the insertion / extraction member 46 for the treatment instrument can be stored in the storage unit 30 included in the endoscope 26. However, the rotation operation of the first rotating member 31 and the second rotating member 32 is possible. May be directly inserted into the forceps channel 3 from the outside.
Moreover, the automatic insertion / extraction units 27 and 43 and the storage unit 30 may be detachable from the endoscope.
Furthermore, although the treatment instrument distal end is assumed to be connected in advance to the treatment instrument insertion / extraction member, it may be detachable.
In this case, not only the forceps but also various kinds of treatment tools can be handled.
The first rotating member 31, the second rotating member 32, and the first winding member 40 may be operated by manual operation, and the second winding member 42 is driven by a motor or the like. It doesn't matter if it is done.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a partial cross section of a treatment instrument insertion / extraction member according to a first embodiment of the present invention and an endoscope including the same. It is a side view of the insertion / extraction member for treatment tools concerning a 1st embodiment of the present invention. It is sectional drawing which shows the treatment tool insertion / extraction member which concerns on the 1st Embodiment of this invention. It is XX and YY sectional drawing of FIG. It is sectional drawing which shows the treatment tool insertion / extraction member which concerns on the 1st Embodiment of this invention. It is a side view which shows the insertion / extraction member for treatment tools which concerns on the 2nd Embodiment of this invention, and an endoscope provided with the same. It is a side view which shows the insertion / extraction member for treatment tools which concerns on the 3rd Embodiment of this invention, and an endoscope provided with the same. It is explanatory drawing which shows the opening part vicinity of the treatment tool insertion / extraction member which concerns on the 3rd Embodiment of this invention, and an endoscope provided with the same.

Explanation of symbols

1, 25, 46 Treatment tool insertion / extraction members 2, 26, 45 Endoscope 3 Forceps channel 5, 38 First shaft member 6, 41 Second shaft member 7 First operation portion 8 Second operation portion 10 47 Forceps (treatment tool tip)
DESCRIPTION OF SYMBOLS 11, 50 Connection member 22 Attachment member 31 1st rotation member 32 2nd rotation member 40 1st winding member 42 2nd winding member A Forceps (treatment tool)

Claims (9)

A first shaft member and a second shaft member arranged in parallel with each other, which are flexible and can be inserted into and removed from the forceps channel of the endoscope;
A distal end portion of the first shaft member is connected to a treatment instrument distal end portion having a treatment portion that is supplied with a driving force and performs treatment, and a treatment portion main body that supports the treatment portion,
The second shaft member is supported by the first shaft member so as to freely advance and retract;
The treatment tool insertion / extraction member, wherein the distal end portion of the treatment instrument is operable by an advance / retreat operation of the second shaft member.   The treatment instrument according to claim 1, wherein the treatment portion main body is detachably connected to the first shaft member, and the treatment portion is detachably connected to the second shaft member. Insertion / extraction member.   The connecting member for connecting the second shaft member to the first shaft member so as to be able to advance and retract is provided between the first shaft member and the second shaft member. Or the treatment tool insertion / extraction member of 2. A first operation unit that advances and retracts the first shaft member; and a second operation unit that advances and retracts the second shaft member in the axial direction with respect to the first shaft member;
The first operation portion is releasably fixed in the middle of the first shaft member, and the second operation portion is releasably fixed in the middle of the second shaft member. The treatment tool insertion / extraction member according to any one of claims 1 to 3.   The treatment tool insertion / extraction member according to claim 4, wherein the first operation portion is provided with an attachment member detachably formed on a forceps opening of an endoscope.   A treatment instrument comprising the treatment instrument insertion / extraction member according to any one of claims 1 to 5. A treatment instrument insertion / extraction member according to any one of claims 1 to 3,
A first rotating member that is in pressure contact with the first shaft member and rotates in the advancing and retracting direction of the first shaft member to advance and retract the first shaft member;
An endoscope comprising: a second rotating member that is in pressure contact with the second shaft member and rotates in the advancing and retracting direction of the second shaft member to advance and retract the second shaft member. A treatment instrument insertion / extraction member according to any one of claims 1 to 3,
Connected to the proximal end of the forceps channel;
A first winding member capable of winding and feeding the proximal end side of the first shaft member; and a second winding member capable of winding and feeding the proximal end side of the second shaft member. An endoscope characterized by being provided. The endoscope according to claim 8, wherein the first shaft member and the second shaft member are formed in a band shape.

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