JP2006068075A - Treatment instrument for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment instrument for an endoscope, which is capable of compactly storing a treatment instrument insertion part and reducing a load on the treatment instrument insertion part when storing it and resistance when operating it. <P>SOLUTION: A rotary drum 7 is disposed with a passage 23 for inserting a forceps insertion part 6 from the side of a recess part 22B to the side of an outer circumferential face 22A. The passage 23 is disposed with a guide part 25 guiding the forceps insertion part 6 in the circumferential direction of the outer circumferential face 22A of a winding part 22 while gradually changing the direction of the distal end side of the forceps insertion part 6 from the radial direction of the rotary drum 7 to a tangential direction as the winding direction side. The guide part 25 is provided with a curving face 25A curving the forceps insertion part 6 at a predetermined curvature. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an endoscope treatment tool.

  When a treatment tool for an endoscope is inserted into a body cavity via a forceps channel of the endoscope, the treatment tool insertion portion is long and handling thereof is troublesome. Therefore, it is wound around a roll-shaped member in a case and stored in a compact manner. At the time of use, it is inserted into the forceps channel of the endoscope while taking out the treatment tool insertion portion from the case, and the treatment tool operation portion provided in the case is used. An endoscopic treatment tool to be operated has been proposed (see, for example, Patent Document 1).

On the other hand, when the treatment instrument insertion portion is wound around a rotating body such as a rotating drum from the central direction toward the outer peripheral direction, the insertion portion is suddenly bent at the portion where the winding starts, so that the outer peripheral surface of the drum is Easy to wear. In view of this, a sheet to be attached to the drum in order to prevent the drum from being worn has been proposed (for example, see Patent Document 2).
US Pat. No. 5,695,491 (FIG. 1) JP 2003-135370 A (FIG. 3)

  However, in the technique described in Patent Document 1, since the storage device is arranged independently of the endoscope, the storage device is separated from the endoscope and is supported when the treatment tool is operated. It is difficult to operate because there is no. Further, since the storage device does not follow when the endoscope is moved, the storage device may obstruct the movement of the endoscope. Furthermore, if the rotating body rotates during insertion / extraction of the treatment instrument insertion section, there is a problem that the operation section of the treatment instrument rotates together with this and interferes with the surroundings.

Further, in the technique described in Patent Literature 2, the treatment instrument insertion portion is bent not only on the drum side but also on the treatment instrument insertion portion side due to abrupt bending, and the treatment instrument insertion portion is caused by excessive refraction. May buckle and affect the operability of the treatment tool.
The present invention has been made in view of the above circumstances, and is an endoscope that can store the treatment instrument insertion portion in a compact manner and can reduce the burden on the treatment instrument insertion portion during storage and the resistance during operation. It aims at providing the treatment tool.

The present invention employs the following means in order to solve the above problems.
An endoscope treatment tool according to the present invention has a treatment part for treating a living body on the distal end side, a treatment tool insertion part that can be inserted into a forceps channel of an endoscope, and a base of the treatment tool insertion part. A rotating drum having a winding portion for winding and storing a portion other than the base end portion while fixing the end portion side at a position near the rotation center; and the treatment instrument insertion portion on the rotating drum, A guide portion is formed so as to be gradually inclined from the radial direction to the tangential direction of the rotating drum from the base end portion side to the tip end portion side and guided to the winding portion.

  When the treatment instrument insertion portion starts to be wound in a direction along the winding portion of the rotary drum, the endoscope treatment instrument follows the guide portion from the proximal end side to the distal end side of the treatment instrument insertion portion. Thus, the treatment instrument insertion portion can be smoothly guided in the winding direction of the winding portion.

The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the guide portion includes a curved surface portion that curves the treatment tool insertion portion with a predetermined curvature. And
This endoscopic treatment tool can suppress a local load from being applied to the treatment instrument insertion portion by winding it along the curved surface portion.

  The endoscope treatment tool according to the present invention is the endoscope treatment tool, and rotatably supports the rotary drum, and leads the distal end side of the treatment tool insertion portion to the outside. And a housing having an opening to be attached to and detached from the endoscope.

  In this endoscope treatment tool, a rotating drum can be disposed in the vicinity of an endoscope by attaching a housing to the endoscope at the time of treatment. It is possible to suitably suppress the troublesome handling of the treatment instrument insertion portion between the housing and the housing. Further, when the treatment is not performed, the housing can be removed, and the treatment instrument insertion portion and the rotating drum can be prevented from interfering with the endoscope operation.

The endoscope treatment tool according to the present invention is the endoscope treatment tool having a treatment part for treating a living body on the distal end side and can be inserted into a forceps channel of the endoscope. A treatment instrument insertion portion;
The proximal end side of the treatment instrument insertion portion is fixed at a position near the center of rotation, and a rotating drum for storing the portion other than the proximal end side around the winding surface portion is stored, and the rotating drum is rotatably supported. And a housing having an opening that leads out the distal end side of the treatment instrument insertion portion to the outside, and the opening connects the forceps port of the endoscope and the rotation center of the rotary drum. It is characterized by being formed so as to open on a connecting straight line.
In the treatment instrument for endoscope, the treatment instrument insertion portion protruding from the opening portion can be arranged on a straight line with respect to the forceps opening at the time of treatment, and the treatment portion can be operated smoothly.

The endoscope treatment tool according to the present invention is the endoscope treatment tool, wherein the housing is detachable from the endoscope.
This endoscope treatment tool can suitably suppress the handling of the treatment tool insertion portion between the endoscope and the housing during treatment, and can be removed when not being treated. It is possible to prevent the operation from getting in the way.

  According to the present invention, the treatment instrument insertion portion can be gently wound around the rotating drum without bending, and damage to the treatment instrument insertion portion can be reduced and the treatment portion can be easily operated.

A first embodiment according to the present invention will be described with reference to FIGS.
As shown in FIGS. 1 to 3, a forceps (endoscopic treatment tool) 1 according to the present embodiment has a forceps part (treatment part) 2 for performing treatment on a living body on the distal end side, and is an endoscope. A forceps insertion section (treatment instrument insertion section) 6 that can be inserted through the three forceps channels 5 and a proximal end portion of the forceps insertion section 6 that is exposed to a position near the rotation center to fix the proximal end side, and a proximal end portion And a housing 10 having an opening 8 for supporting the rotary drum 7 rotatably inside and leading out the distal end side of the forceps insertion portion 6 to the outside. I have.

The forceps insertion portion 6 includes a flexible operation tube portion 11 and an operation wire portion 12 that extends in and out of the operation tube portion 11 and transmits an operation force to the forceps portion 2.
At the base end of the operation tube portion 11 exposed from the rotating drum 7, a first connecting portion 13 comprising a tubular base portion 13A fixed to the rotating drum 7 and a flange portion 13B connected to the end portion of the base portion 13A. Is provided.

As shown in FIGS. 4 (a) to 4 (d), the operation wire portion 12 is a stranded wire having a relatively large diameter, and the outer periphery of the center wire 15 extends along the axial direction of the center wire 15. And a plurality of relatively thin single-wire wires 16 arranged.
The single wire 16 may be fixed to the central wire 15 with an adhesive 12A as shown in FIGS. 4 (a) and 4 (b). The single wire 16 may be attached to the central wire 15 as shown in FIGS. 4 (c) and 4 (d). It may be twisted.

At the proximal end of the operation wire portion 12 exposed from the rotating drum 7, a spherical first wire end portion 17A and a flange-like shape are formed spaced apart from the first wire end portion 17A toward the distal end side at a constant interval. In addition, a second connecting portion 17 including a second wire end portion 17B and a tubular locking portion 17C that connects the first wire end portion 17A and the second wire end portion 17B is provided.
Further, a spring member 18 is disposed between the flange portion 13B and the second wire end portion 17B so as to maintain these intervals.

As shown in FIGS. 3, 5, and 6, the rotating drum 7 has two side plates 20, 21 and a winding in which the forceps insertion portion 6 is wound around an outer peripheral surface (winding portion) 22 </ b> A between them. And a take-up section 22. In the central portion of the winding portion 22, a concave portion 22 </ b> B is formed that is open to the side plate 20 side and is provided with the proximal end portion of the forceps insertion portion 6 exposed.
The rotary drum 7 is provided with a passage 23 through which the forceps insertion portion 6 can be inserted from the concave portion 22B side to the outer peripheral surface 22A side. In addition, the forceps insertion portion 6 is gradually inclined from the radial direction to the tangential direction of the rotary drum 7 from the proximal end side to the distal end side, and is guided in the circumferential direction of the outer peripheral surface 22A of the winding portion 22. Is disposed in the passage 23.
The guide portion 25 includes a curved surface portion 25A that bends the forceps insertion portion 6 with a predetermined curvature.

The housing 10 is provided with an attachment portion 30 that can be attached to and detached from an engagement hole 28 disposed in the operation portion 27 in the vicinity of the forceps opening 26 of the endoscope 3. The attachment portion 30 can rotate the housing 10 relative to the endoscope 3 when engaged with the engagement hole 28.
The housing 10 is provided with a bearing 31 that rotatably supports the rotary drum 7.

Next, an operation method of the forceps 1 according to the present embodiment, and actions and effects will be described by taking a case where the forceps 1 is a biopsy forceps as an example.
First, the forceps insertion portion 6 is wound around the outer peripheral surface of the winding portion 22 of the rotary drum 7, and the forceps 1 with the forceps portion 2 protruding from the opening 8 is prepared. The attachment part 30 of the forceps 1 is inserted into 28 and attached.
Subsequently, the insertion portion 32 of the endoscope 3 is inserted into the body cavity. At this time, the orientation of the housing 10 is adjusted so as not to obstruct the operation of the endoscope 3.

When performing a biopsy after inserting the insertion portion 32, the distal end of the forceps insertion portion 6 protruding from the opening 8 is grasped and pushed into the forceps channel 5 from the forceps opening 26. At this time, the rotating drum 7 rotates with respect to the housing 10 in accordance with the pushing operation, and the forceps insertion portion 6 is smoothly fed into the forceps channel 5.
After the forceps part 2 is projected from the tip of the forceps channel 5 to a desired position, the second connection part 17 is moved closer to the first connection part 13 in the direction in which the spring member 18 contracts. At this time, the operation wire portion 12 moves forward with respect to the operation tube portion 11 to open the forceps portion 2.

  When grasping the tissue, the second connecting portion 17 is moved away from the first connecting portion 13, and the operating wire portion 12 is retracted to the proximal end side with respect to the operating tube portion 11 to forceps portion 2. Close. In this state, the exposed forceps insertion portion 6 is pulled between the forceps opening 26 and the opening 8 and the tissue is removed and collected.

  After collecting the tissue, the forceps insertion portion 6 exposed between the forceps opening 26 and the opening 8 is gripped, and the forceps insertion portion 6 is pushed into the housing 10 from the opening 8. At this time, the rotary drum 7 is rotated by the bearing 31, and the forceps insertion portion 6 is wound around the outer peripheral surface 22 </ b> A of the winding portion 22. At this time, depending on the magnitude of the pushing force, the forceps insertion portion 6 may jump out as it is in the tangential direction of the outer peripheral surface 22A.

According to the forceps 1, when the forceps insertion portion 6 starts to be wound in the direction along the outer peripheral surface 22 </ b> A of the winding portion 22, the forceps insertion portion 6 extends along the guide portion 25 from the proximal end side to the distal end portion side. Thus, the forceps insertion portion 6 can be smoothly guided in the circumferential direction of the outer peripheral surface 22A.
At this time, it is possible to suppress a local load from being applied to the forceps insertion portion 6 by winding along the curved surface portion 25 </ b> A of the guide portion 25. Therefore, even when the proximal end portion side of the forceps insertion portion 6 is fixed to the rotary drum 7, local bending of the forceps insertion portion 6 can be suppressed, and the operation wire portion 12 can be operated with respect to the operation tube portion 11 so as to freely advance and retract. The forceps portion 2 can be operated smoothly.

  In addition, by attaching the housing 10 to the operation unit 27 of the endoscope 3 during the treatment, the rotating drum 7 can be disposed in the vicinity of the forceps opening 26 of the endoscope 3, and during the treatment, The troublesome handling of the forceps insertion portion 6 between the mirror 3 and the housing 10 can be suitably suppressed. Furthermore, when no treatment is performed, the housing 10 can be removed, and the forceps insertion portion 6 and the rotating drum 7 can be prevented from interfering with the endoscope operation.

Next, a second embodiment will be described with reference to FIGS.
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 opening 37 arranged in the housing 36 of the forceps 35 according to the present embodiment rotates the forceps port 26 of the endoscope 38 and the rotary drum 7. The point is that the opening is formed on a straight line connecting the center C.

The opening 37 of the housing 36 includes a slit 37 </ b> A through which the forceps insertion portion 6 can be inserted along the side surface of the housing 36.
The operation portion 40 of the endoscope 38 is provided with an arm portion 41 having an engagement hole 28 disposed at the tip thereof. The attachment portion 30 connects the attachment portion 30 of the housing 36 to the engagement hole of the arm portion 41. When attached to 28, the passage 23 and the rotation center C are arranged on the central axis C1 of the forceps port 26.

Next, the operation method, action, and effect of the forceps 35 according to the present embodiment will be described.
First, the housing 36 is mounted in the engagement hole 28 of the endoscope 38 as in the first embodiment, and the forceps insertion portion 6 is taken out from the opening 37 of the housing 36 as shown in FIG. Then, the forceps port 26 is inserted into the forceps channel 5.
When the forceps insertion portion 6 wound around the winding portion 22 of the rotary drum 7 is completely removed, the forceps insertion portion 6 enters the slit 37A, and as shown in FIG. 8B, the forceps insertion portion 6 is a direction substantially coinciding with the central axis C1 of the forceps opening.
In this state, the same operation as in the first embodiment is performed to perform a predetermined treatment.

When winding the forceps insertion portion 6, the forceps insertion portion 6 is gripped and pushed into the housing 36 as in the first embodiment.
At this time, the forceps insertion portion 6 moves from the slit 37 </ b> A of the housing 36 to the opening 37 along with the rotation of the rotating drum 7 and is wound around the outer peripheral surface 22 </ b> A of the winding portion 22.

  According to the forceps 35, the forceps insertion portion 6 protruding from the opening portion 37 is arranged in a straight line with respect to the forceps port 26 at the time of treatment. Therefore, the operation tube portion 11 and the operation wire portion due to the bending of the forceps insertion portion 6 are arranged. The sliding resistance with respect to the operation tube portion 11 can be suppressed, and the operation wire portion 12 can be freely advanced and retracted with respect to the operation tube portion 11 to smoothly operate the forceps portion 2.

Next, a third embodiment will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the third embodiment and the first embodiment is that the guide unit 25 is arranged on the rotary drum 7 according to the first embodiment, but the rotation of the forceps 55 according to this embodiment is different. The drum 56 is formed with a guide inclined surface 58A that opens to the outer peripheral surface 57 of the rotating drum 56 and gradually tilts in the thickness direction of the rotating drum 56 to guide the forceps inserting portion 6. The hole 58 is disposed in the vicinity of the outer peripheral surface 57, and the hole opening 58 </ b> B of the hole 58 is disposed at a position facing the opening 61 of the housing 60.

The rotating drum 56 is formed in a substantially cylindrical shape, and a slight gap is provided between the outer peripheral surface 57 of the rotating drum 56 and the housing 60. A part of the outer peripheral surface 57 is formed in a bowl shape with respect to the hole 58.
The opening width of the opening 61 of the housing 60 and the opening width of the hole opening 58 </ b> B are approximately the same size as the outer diameter of the forceps insertion portion 6.

Next, the operation method, action, and effect of the forceps 55 according to this embodiment will be described.
First, the housing 60 is mounted in the engagement hole 28 as in the first embodiment, and the forceps insertion part 6 is inserted into the forceps channel 5 from the forceps opening 26 while being taken out from the opening 61 of the housing 60.
In this state, the same operation as in the first embodiment is performed to operate the forceps unit 2.

  After the tissue is collected as in the first embodiment, the forceps insertion portion 6 exposed between the forceps opening 26 and the opening 61 is gripped, and the forceps insertion portion 6 is pushed into the housing 60 from the opening 61. At this time, the rotary drum 56 is rotated by the bearing 31, and the forceps insertion portion 6 is wound around the guide inclined surface 58 </ b> A of the rotary drum 56. At this time, the forceps insertion portion 6 inserted from the opening 61 of the housing 60 is inserted as it is into the hole opening 58B of the rotary drum 56, and is guided into the hole 58 along the guide inclined surface 58A. It is wound sequentially from the back side.

  According to the forceps 55, when the forceps insertion portion 6 is wound, the forceps insertion portion 6 inserted into the housing 60 from the opening 61 can be wound into the hole 58 while abutting against the guide inclined surface 58A. . Therefore, even if the forceps insertion portion 6 attempts to expand outward in the radial direction of the rotating drum 56 by the winding force, the hook-shaped inner surface of the hole 58 can regulate this, and the force to expand the force Since the rotary drum 56 is further rotated, the forceps insertion portion 6 can be stably wound.

  Further, when the forceps insertion portion 6 is wound, the opening 61 and the hole opening 58B are opposed to each other, and each opening width is substantially the same as the outer diameter of the forceps insertion portion 6. When winding the part 6, it can be stored directly in the hole 58 from the opening 61, and the forceps insertion part 6 can be wound in the hole 58 without overlapping.

Next, a fourth embodiment will be described with reference to FIGS. 11 and 12.
In addition, the same code | symbol is attached | subjected to the component similar to other embodiment mentioned above, and description is abbreviate | omitted.
The difference between the fourth embodiment and the third embodiment is that the corner of the rotary drum 66 of the forceps 65 according to this embodiment is chamfered to form an inclined surface 67, and the hole 68 is formed on the inclined surface 67. A guide that opens and is formed in the thickness direction of the rotary drum 66 and that faces the inclined surface 67 of the housing 69 and is substantially parallel to the inclined surface 67 to guide the forceps insertion portion 6 into the hole 68. An inclined surface 69A is formed, and the opening 61 of the housing 69 and the hole opening 68A of the hole 68 are arranged to face each other.
The forceps 65 can also obtain the same actions and effects by the same operation method as in the third embodiment.

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 above embodiment, the forceps part 2 is connected to the forceps insertion part 6 in advance and integrated, but as shown in FIG. 13, the forceps tip 70 with the forceps part 2 arranged at the tip is a forceps insertion part. 71 may be detachable.

In this case, the operation wire portion 72 is the first operation wire portion 73 on the forceps tip portion 70 side and the second operation wire portion 75 on the forceps insertion portion 71 side, and the operation tube portion 76 is the forceps tip portion 70. The first operation tube portion 77 on the side and the second operation tube portion 78 on the forceps insertion portion 71 side are provided.
The proximal end side of the first operation wire portion 73 and the distal end side of the second operation wire portion 75 are in a state where the central axis C2 of the forceps distal end portion 70 and the central axis C3 of the forceps insertion portion 71 are orthogonal to each other. The first engagement means 80 that is engaged and engaged with each other in a state in which the central axes thereof coincide with each other, and the proximal end side of the first operation tube portion 77 and the distal end side of the second operation tube portion 78, A second engagement means 81 is provided that engages with the first engagement means 80 as a rotation center in a state where the central axes of the forceps distal end portion 70 and the forceps insertion portion 71 are aligned.

The first engagement means 80 is formed of a strip-like thin plate, is connected to the proximal end of the first operation wire portion 73, and has a first connecting member 82 having a through hole 82A that is wide in the axial direction on the end side. And a projecting shape that is formed in a substantially semi-cylindrical shape along the central axis C3, is connected to the tip of the second operation wire portion 75, and protrudes from the flat portion 83A including the central axis C3 into the through hole 82A. And a second connecting member 83 having a portion 83B.
The second engaging means 81 includes an operation tube flange portion 85 provided at the proximal end of the first operation tube portion 77, and a protrusion of the protruding portion 83B provided at the distal end of the second operation tube portion 78. A support means 86 having a notch portion 86A into which the operation tube flange portion 85 can be inserted from the direction and a restricting portion 86B that is engageable with the operation tube flange portion 85 and restricts movement of the operation tube flange portion 85 in the axial direction. It has.

The opening 90 of the housing 87 is connected to a fixture 90 provided with a guide groove 90 </ b> A formed in a width capable of guiding the forceps tip 70. A center hole 90B through which the forceps insertion portion 71 can be inserted is formed at the center of the fixture 90.
The guide groove 90A has a protruding portion 83B when the distal end of the forceps insertion portion 71 is arranged in the center hole 90B of the fixture 90 and the first connecting member 82 of the forceps distal end portion 70 is inserted into the guide groove 90A. Can be inserted into the through-hole 82A, and the protrusion 83B and the through-hole 82A are engaged while moving the forceps tip 70 in a direction in which the center axis C2 of the forceps tip 70 and the center axis C3 of the forceps insertion portion 71 coincide. At the same time, the operation tube flange portion 85 is inserted from the notch portion 86A and brought into contact with the restricting portion 86B so as to conform to the locus when the forceps tip portion 70 is guided to the center hole 90B.

When the forceps tip 70 is attached to the forceps insertion portion 71, the first connecting member 82 is inserted into the guide groove 90A, and the protruding portion 83B is inserted into the through hole 82A.
In this state, the forceps insertion portion 71 is slightly fed to the distal end side, and then the distal end side of the forceps distal end portion 70 is bent along the guide groove 90A in the projecting direction of the projecting portion 83B. Is rotated in the direction in which the central axis C2 and the central axis C3 coincide with each other, and the operation tube flange portion 85 is inserted into the notch portion 86A and brought into contact with the restricting portion 86B along the guide groove 90A.

Thereafter, the forceps insertion portion 71 is sent out by the same operation as described above to perform a predetermined treatment. After the treatment is finished, the forceps insertion portion 71 is wound and the first engagement means 80 and the second engagement are wound. When the means 82 is wound into the fixture 90, the forceps tip 70 is removed from the forceps insertion portion 71 by operating in the opposite direction to that described above.
In this way, by replacing the forceps tip 70 with the tip of another treatment tool, the long treatment tool insertion portion can be handled more easily.

Further, as shown in FIG. 14A, the forceps insertion portion 95 is movable forward and backward with respect to the operation tube portion 11 and the operation wire portion 12, and is interposed between the operation tube portion 11 and the operation wire portion 12. It does not matter even if the arranged tube 96 is provided.
By providing this tube 96, the sliding resistance between the operation tube part 11 and the operation wire part 12 can be reduced more, and smooth operation can be performed.
And as shown to FIG.14 (b), (c), in order to improve flexibility, you may arrange | position several notches 96A on the surface in this tube 96. FIG.

(Additional item 1)
A treatment instrument insertion section that has a treatment section for performing treatment on a living body on the distal end side and can be inserted into a forceps channel of an endoscope;
A rotating drum having a winding part for winding and storing a part other than the base end part while fixing the base end part side of the treatment instrument insertion part to a position near the rotation center;
A housing that rotatably supports the rotating drum and has an opening that leads the distal end side of the treatment instrument insertion portion to the outside,
A hole that opens in the outer peripheral surface of the rotating drum and gradually inclines in the thickness direction of the rotating drum to form a guide inclined surface that guides the previous treatment instrument insertion portion, and accommodates the treatment instrument insertion portion therein Is disposed near the outer peripheral surface of the rotating drum,
A treatment instrument for an endoscope, wherein a hole opening of the hole is arranged at a position facing the opening of the housing.

(Appendix 2)
A treatment instrument insertion section that has a treatment section for performing treatment on a living body on the distal end side and can be inserted into a forceps channel of an endoscope;
A rotating drum having a winding part for winding and storing a part other than the base end part while fixing the base end part side of the treatment instrument insertion part to a position near the rotation center;
A housing that rotatably supports the rotating drum and has an opening that leads the distal end side of the treatment instrument insertion portion to the outside,
The corner of the rotating drum is chamfered to form an inclined surface,
A hole that opens in the inclined surface and accommodates the treatment instrument insertion portion in the thickness direction of the rotating drum is disposed near the outer peripheral surface of the rotating drum,
A guide inclined surface that is substantially parallel to the inclined surface and guides the treatment instrument insertion portion to the hole portion is formed at a position facing the inclined surface of the housing,
The treatment instrument for an endoscope, wherein the opening of the housing and the opening of the hole are opposed to each other.

  When the treatment instrument insertion portion is wound up, the endoscope treatment instrument is wound inside the hole portion by winding the treatment instrument insertion portion inserted into the housing from the opening portion into the hole portion while abutting the guide inclined surface. The treatment instrument insertion portion can be inserted in sequence. At this time, the side surface of the hole on the outer peripheral surface side can restrict the treatment instrument insertion portion from expanding outward in the radial direction of the rotating drum, and the force to expand further rotates the rotating drum. Therefore, the treatment instrument insertion portion can be stably wound.

(Additional Item 3)
The endoscope according to claim 1 or 2, wherein the opening width of the opening and the opening width of the hole opening are substantially the same as the outer diameter of the treatment instrument insertion portion. Treatment tool.
When the treatment instrument insertion portion is wound up, the endoscope treatment instrument can be wound while preventing the treatment instrument insertion portion from overlapping in the hole.

It is explanatory drawing which shows the state at the time of mounting | wearing the forceps which concern on the 1st Embodiment of this invention with an endoscope. It is a perspective view which shows the forceps which concern on the 1st Embodiment of this invention. It is AA sectional drawing of FIG. The forceps insertion part of the forceps concerning a 1st embodiment of the present invention is shown. (A) (b): Side view, (c): CC sectional view of (a), (d) D- of (b) It is D sectional drawing. It is BB sectional drawing of FIG. It is an enlarged view which shows the guide part vicinity of the forceps which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the forceps which concern on the 2nd Embodiment of this invention. (A): a state in which a forceps insertion portion is inserted into a forceps channel, and (b): a state in which all the forceps insertion portions are removed, with the forceps according to the second embodiment of the present invention attached to the endoscope. FIG. It is a perspective view which shows the forceps which concern on the 3rd Embodiment of this invention. It is EE sectional drawing of FIG. It is a perspective view which shows the forceps which concern on the 4th Embodiment of this invention. It is FF sectional drawing of FIG. (A) of the forceps which concerns on other embodiment which concerns on this invention: A perspective view which shows a fixture vicinity, (b) It is explanatory drawing which shows the state which attaches a forceps front-end | tip part to a forceps insertion part. (A): Side view including a partial cross section showing a forceps insertion portion, (b) Side view showing a tube according to another embodiment of the present invention.

Explanation of symbols

1, 35, 55, 65 Forceps (endoscopic instrument)
2 Forceps part (treatment part)
3, 38 Endoscope 5 Forceps channel 6, 71 Forceps insertion part (treatment instrument insertion part)
7, 56, 66 Rotating drum 8, 37, 61, 88 Opening 10, 36, 60, 69, 87 Housing 22A, 57 Outer peripheral surface (winding part)
25 Guide part 25A Bending part

Claims (5)

A treatment instrument insertion section that has a treatment section for performing treatment on a living body on the distal end side and can be inserted into a forceps channel of an endoscope;
The proximal end side of the treatment instrument insertion portion is fixed at a position near the rotation center, and includes a rotating drum having a winding portion for winding and storing a portion other than the base end portion,
The rotating drum has a guide portion that guides the treatment instrument insertion portion to the winding portion by gradually inclining the treatment instrument insertion portion from a radial direction to a tangential direction from the proximal end side to the distal end side. An endoscope treatment tool characterized by being formed.   The endoscope treatment tool according to claim 1, wherein the guide portion includes a curved surface portion that curves the treatment instrument insertion portion with a predetermined curvature. A housing having an opening for rotatably supporting the rotating drum and leading out the distal end side of the treatment instrument insertion portion to the outside;
The endoscope treatment tool according to claim 1 or 2, wherein the housing is detachable from the endoscope. A treatment instrument insertion portion that has a treatment portion for performing treatment on a living body on the distal end side and can be inserted into a forceps channel of an endoscope;
A rotating drum for fixing the proximal end side of the treatment instrument insertion portion to a position in the vicinity of the rotation center and winding and storing a portion other than the proximal end side around the winding surface portion;
A housing that rotatably supports the rotating drum and has an opening that leads the distal end side of the treatment instrument insertion portion to the outside;
Is provided,
The treatment instrument for an endoscope, wherein the opening is formed to open on a straight line connecting a forceps opening of the endoscope and a rotation center of the rotary drum. The endoscopic treatment tool according to claim 4, wherein the housing is attachable to and detachable from the endoscope.

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