JP2015049440A - Treatment instrument for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment instrument for endoscope that is used together in an industrial endoscope upon an industrial endoscope inspection, is capable of easily implementing a foreign object recovery within a device, sampling within a pipe and the like, and is excellent in operability.SOLUTION: A treatment instrument for endoscope 1 has: a sheath 3 that is inserted into a treatment instrument channel of an endoscope; a foreign object recovery part 2 that is provided at a tip end of the sheath 3; a grabber part 10 that is provided in the foreign object recovery part 2, is operated to advance and retreat in a longitudinal direction of the sheath 3, and is extendedly provided in an outer diameter direction orthogonal to a longitudinal axis of the sheath 3; a stationary part 11 that is provided in the foreign object recovery part 2 so as to face the grabber part 10, and is extendedly provided in an outer diameter orthogonal to the longitudinal axis of the sheath 3.

Description

  The present invention relates to a treatment tool used together with an endoscope, and more particularly to an endoscope treatment tool for an industrial endoscope.

  2. Description of the Related Art In industrial endoscope inspection, there is a known treatment instrument that is used by being inserted into a treatment instrument channel of an industrial endoscope when collecting foreign matter in an apparatus, performing amplification in a pipe, or the like.

  As a treatment tool used in combination with such an industrial endoscope, for example, an endoscope gripping tool as described in Patent Document 1 is known. The endoscope gripping tool, which is a conventional endoscopic treatment tool, can stably grip even a flat foreign object such as a coin by using a plurality of foreign body capturing arms. .

JP 2002-272754 A

  However, although the endoscope gripping tool disclosed in Patent Document 1 is easy to grip and collect a small foreign object, there is a problem that it is not suitable for collecting a large foreign object such as a screw. Furthermore, the endoscope treatment tool has a very poor operability particularly when used in combination with an industrial endoscope having a long insertion portion. There is a problem that it is difficult to collect the foreign matter between the plurality of foreign matter catching arms as the part and it is difficult to collect the foreign matter.

  Therefore, the present invention has been made in view of the above problems, and its object is to be used together with an industrial endoscope at the time of industrial endoscope inspection, for collecting foreign matter in equipment, sampling in piping, etc. It is an object of the present invention to provide an endoscopic treatment tool that can be easily operated and has good operability.

  An endoscope treatment tool according to an aspect of the present invention is an endoscope treatment tool that is used by being inserted into a treatment tool channel of an endoscope, the sheath being inserted into the treatment tool channel, A foreign matter collecting portion provided at the distal end of the sheath, a gripping portion provided in the foreign matter collecting portion, advanced and retracted in the longitudinal direction of the sheath, and extended in the outer diameter direction perpendicular to the longitudinal axis of the sheath; A fixing portion that is provided in the foreign matter recovery portion so as to face the gripping portion and extends in an outer diameter direction orthogonal to the longitudinal axis of the sheath.

  According to the present invention, in particular, an endoscope treatment tool with good operability that can be used together with an industrial endoscope at the time of industrial endoscopy and can easily collect foreign matter in a device and sample in a pipe. Can be provided.

The side view which shows the whole structure of the treatment tool for endoscopes which concerns on the 1st Embodiment of this invention. The perspective view which shows the structure of a foreign material collection | recovery part similarly The side view which shows the operation | movement which collects a foreign material by a foreign material collection | recovery part similarly The perspective view which shows the structure of the foreign material collection | recovery part of a 1st modification same as the above The perspective view which shows the structure of the foreign material collection | recovery part of a 2nd modification same as the above The perspective view which shows the structure of the foreign material collection | recovery part of a 3rd modification same as the above The side view which shows operation | movement when collect | recovering foreign materials by the foreign material collection | recovery part of a 3rd modification same as the above The perspective view which shows schematically the structure of the treatment tool for endoscopes which concerns on the 2nd Embodiment of this invention. The perspective view explaining the operation of the actuator The perspective view which showed schematically the whole structure of the treatment tool for endoscopes of the 1st modification similarly. Sectional drawing which shows the structure of the foreign material collection | recovery part of a 1st modification same as the above The perspective view which shows the structure of the foreign material collection | recovery part of a 2nd modification same as the above The perspective view which shows the structure of the foreign material collection | recovery part of a 3rd modification same as the above Sectional drawing which shows the structure of the foreign material collection | recovery part of a 3rd modification same as the above The perspective view which shows the structure of the foreign material collection | recovery part which concerns on the 3rd Embodiment of this invention. Sectional drawing showing the configuration of the foreign material recovery unit The top view which shows schematically the structure of the treatment tool for endoscopes of a modification same as the above Sectional drawing which shows the structure of the insertion pipe part of a modification same as the above The perspective view which shows the structure of the foreign material collection | recovery part of a 1st reference example. The perspective view which shows the structure of the foreign material collection | recovery part of a 2nd reference example. The perspective view which shows the structure of the foreign material collection part of the 3rd reference example. The perspective view which shows the structure of the foreign material collection | recovery part of a 4th reference example.

Hereinafter, the present invention will be described with reference to the drawings.
In the following description, the drawings based on each embodiment are schematic, and the relationship between the thickness and width of each part, the thickness ratio of each part, and the like are different from the actual ones. It should be noted that the drawings may include portions having different dimensional relationships and ratios between the drawings.

(First embodiment)
First, a first embodiment of the present invention will be described below with reference to the drawings.
1 is a side view showing the overall configuration of the endoscope treatment tool, FIG. 2 is a perspective view showing the configuration of the foreign substance collection unit, FIG. 3 is a side view showing the operation of collecting the foreign substance by the foreign substance collection unit, and FIG. FIG. 5 is a perspective view showing the configuration of the foreign matter recovery unit of the first modification, FIG. 5 is a perspective view showing the configuration of the foreign matter recovery unit of the second modification, and FIG. 6 is the configuration of the foreign matter recovery unit of the third modification. FIG. 7 is a side view showing an operation when foreign matter is collected by the foreign matter collecting part of the third modification.

  FIG. 1 shows an endoscopic treatment instrument 1 that is used by being inserted into a treatment instrument channel of an industrial endoscope (not shown) (not shown) at the time of industrial endoscopy. The endoscope treatment tool 1 includes, in order from the distal end, a foreign substance collection part 2, an insertion tube part 3 that is a flexible tube body sheath connected to the foreign substance collection part 2, and the insertion tube part 3. And a housing part 4 to which the base end part of the pipe part 3 is connected.

  The housing part 4 is provided with an operation handle 5 that can be moved and a handle part 7 having a fixed handle 6. The operation handle 5 is connected to an operation wire 8 inserted into the insertion tube portion 3. Then, the operation handle 5 is turned to the fixed handle 6 side, thereby pulling the operation wire 8 to the proximal side that is the proximal side.

  As shown in FIG. 2, the foreign matter collection unit 2 includes a tip gripping unit 10 provided at the tip of the operation wire 8 and an expansion fixing unit 11 provided at the tip of the insertion tube unit 3. ing.

  The tip gripping part 10 includes a bullet-shaped fixing part 12 fixed to the operation wire 8 and a direction orthogonal to the longitudinal axis direction of the fixing part 12, that is, the longitudinal axis of the operation wire 8, the insertion tube part 3, etc. A plurality of (in this case, four) gripping wires 13 extend radially toward the outer diameter direction, which is the outer periphery.

  These four gripping wires 13 are formed of a metallic wire, glass fiber, carbon fiber, or the like, and are curved so as to be inclined toward the base end (rear) side that is the side of the extension fixing portion 11 on the proximal side. Note that the number of gripping wires 13 is not limited to four, and may be any number as long as it is plural.

  The extension fixing portion 11 is formed by extrapolating and fixing the circular tube portion 14 to the distal end portion of the insertion tube portion 3, and around the longitudinal axis of the circular tube portion 14 from the outer peripheral portion of the circular tube portion 14, that is, the operation wire 8. A plurality of, in this case, four rectangular gripping pieces 15 extend radially outwardly about the longitudinal axis of the insertion tube portion 3 or the like.

  The four gripping pieces 15 are integrally formed with the circular pipe portion 14 from synthetic resin, rubber, or the like, and are provided so as to incline with elasticity (spring property) on the tip (front) side that is the tip gripping portion 10 side. It has been. Note that the number of the gripping pieces 15 is not limited to four, and may be any number as long as it is plural.

  Then, the foreign matter collecting part 2 moves forward and backward so that the tip gripping part 10 approaches or separates from the expansion fixing part 11 by pulling and loosening the operation wire 8 according to the operation of the operation handle 5 of the handle part 7.

  The foreign substance recovery unit 2 configured in this manner is provided so that the four gripping wires 13 of the tip gripping part 10 and the four gripping pieces 15 of the extension fixing part 11 face each other. The four gripping wires 13 of the tip gripping portion 10 that moves forward and backward are set to be larger in the radial direction than the four gripping pieces 15 of the expansion fixing portion 11.

  This is to reduce the amount of foreign matter collected during forward / backward movement. Further, the gripping wire 13 has an inclined shape, and the foreign matter taken into the gripping wire 13 moves so as to gather in the center. The gripping piece 15 has a shape that is wider in the circumferential direction than the wire 13 in order to securely grip the captured foreign matter.

  The endoscope treatment tool 1 according to the present embodiment described above is configured so that the distal end gripping portion 10 comes close to the expansion fixing portion 11 as shown in FIG. 3 by operating the operation handle 5 of the handle portion 7. The operation wire 8 is pulled.

  Thus, the endoscope treatment tool 1 moves the foreign object 100 in the device to the front side so as to be hooked by any of the four gripping wires 13 of the tip gripping unit 10, thereby The foreign object 100 is brought into contact with one of the gripping pieces 15 and can be easily recovered by being held (gripped) by the gripping wire 13 and the gripping piece 15 so as to sandwich the foreign object 100.

  That is, the endoscope treatment tool 1 grips the foreign object 100 with one of the four gripping wires 13 and the four gripping pieces 15 provided radially, regardless of the position around the longitudinal axis of the foreign substance collection unit 2. Can be recovered.

  Furthermore, since the gripping piece 15 against which the foreign object 100 is in contact has elasticity (spring property), the foreign object 100 is urged toward the distal end by being pushed into the proximal end side. Thereby, when the foreign material 100 is clamped by the gripping wire 13 and the gripping piece 15, the foreign material 100 is hard to come off and can be reliably collected.

  Note that the endoscope treatment tool 1 may be configured to prevent obstruction of the visual field by the endoscope by making the four gripping pieces 15 of the extension fixing portion 11 provided on the hand side transparent. Further, the endoscope treatment tool 1 has a configuration in which the four gripping wires 13 of the distal end gripping portion 10 provided on the distal end side are radially provided at predetermined intervals, and therefore, the front (front end) side by the endoscope. The obstruction of the visual field is also prevented.

  As described above, the endoscope treatment tool 1 according to the present embodiment is used together with an endoscope at the time of industrial endoscopy, and can easily collect the foreign matter 100 in the apparatus, etc. It is to make the configuration easy to operate. Note that the endoscope treatment tool 1 has a good operability, and thus can be easily sampled in a pipe.

(First modification)
As shown in FIG. 4, the endoscope treatment tool 1 is exposed between the distal gripping portion 10 and the expansion fixing portion 11 when the distal gripping portion 10 is separated from the expansion fixing portion 11. As described above, the operation wire 8 may be provided with a columnar magnet 16.

  By providing the magnet 16 on the operation wire 8 as described above, the metallic foreign matter (100) is attracted to and attracted to the magnet 16 so that the foreign matter (100) can be collected more easily.

(Second modification)
In addition, the endoscope treatment tool 1 is not limited to the four gripping pieces 15 of the extension fixing portion 11 being rectangular, but may have a claw shape with an extended end as shown in FIG. . Thus, the retainability of a foreign material (100) improves more by making the four holding pieces 15 into a nail shape.

(Third Modification)
Furthermore, as shown in FIG. 6, the endoscope treatment tool 1 is configured such that a bellows tube 17 is provided on the base end side from the four gripping pieces 15 in the expansion and fixing portion 11 and expands and contracts along the longitudinal axis. It is good.

  Thereby, in addition to the elasticity (spring property) to the front end (front) side by the four gripping pieces 15, the expansion fixing portion 11 is pushed into the base end (rear) side that is the proximal side, The foreign material 100 is urged toward the distal end by the repulsive force generated when it contracts.

  By adopting such a configuration, the endoscope treatment tool 1 can be more reliably collected when the foreign object 100 is sandwiched between the gripping wire 13 and the gripping piece 15 and the foreign object 100 is hardly detached.

  By the way, as shown in FIG. 7, the bellows tube 17 has a double structure in which a space 17a is formed, and is configured to extend to the distal end side by supplying air (including CO 2 and the like) into the space 17a. It is good.

  The insertion tube portion 3 having this configuration is a multi-lumen tube having a lumen 3a communicating with the space 17a in order to supply air into the space 17a of the bellows tube 17. Although not shown, the insertion tube portion 3 is configured such that a CO2 air cartridge or the like is connected to the proximal end portion.

  With such a configuration, the endoscope treatment tool 1 holds the foreign object 100 between the gripping wire 13 and the gripping piece 15 by moving the bellows tube 17 to which air is supplied into the space 17a toward the distal end side. Sometimes, the foreign material 100 is hard to come off and can be collected more reliably.

(Second Embodiment)
Next, a second embodiment of the present invention will be described below based on the drawings. In addition, about each component described in 1st Embodiment, the same code | symbol is used about the thing of the same structure, and those detailed description is abbreviate | omitted.
FIG. 8 is a perspective view schematically showing the configuration of the endoscope treatment tool, FIG. 9 is a perspective view for explaining the operation of the actuator, and FIG. 10 is the overall configuration of the endoscope treatment tool according to the first modification. FIG. 11 is a cross-sectional view showing the configuration of the foreign matter recovery unit of the first modification, FIG. 12 is a perspective view showing the configuration of the foreign matter recovery unit of the second modification, and FIG. FIG. 14 is a cross-sectional view showing a configuration of a foreign matter recovery unit according to a third modification. FIG. 14 is a perspective view showing a configuration of the foreign matter recovery unit according to a third modification.

  As shown in FIG. 8, the endoscope treatment tool 1 according to the present embodiment pulls the operation wire 8 that moves the tip gripping portion 10 of the foreign substance collection unit 2 forward or backward so as to approach or separate from the expansion fixing unit 11. An actuator 20 for relaxing is provided in the insertion tube portion 3.

  The actuator 20 has a distal end connected to the operation wire 8 and a tube 21 for supplying air (including CO 2 and the like) from the proximal end. Air is supplied to the tube 21 from the cylinder 23 via the operation valve 22.

  The actuator 20 used here is a so-called McKibben type soft actuator in which a rubber tube having elasticity is provided in a net formed of fibers made of PET, polyamide wire, stainless steel wire or the like. It has been. As shown in FIG. 9, the actuator 20 expands or contracts by a fiber network covering the rubber tube by inflating and contracting the rubber tube by pressurization by air intake (supply) by the operation valve 22 or decompression by exhaust. By doing so, the length in the longitudinal direction can be varied.

  As described above, the endoscope treatment tool 1 according to the present embodiment differs from the configuration in which the operation wire 8 is pulled and loosened by operating the operation handle 5 of the handle portion 7 as in the first embodiment. The operation wire 8 is pulled and loosened by 20.

  The actuator 20 can obtain a high-output shrinkage performance. Therefore, the endoscope treatment tool 1 can reliably pull the operation wire 8 in particular even when the insertion tube portion 3 has a long configuration in accordance with the long insertion portion of the industrial endoscope. Therefore, the tip gripping part 10 of the foreign material recovery part 2 can be moved so as to be close to the expansion fixing part 11. In particular, when the insertion part is long, it is difficult to pull the grip part at the tip, and it becomes difficult to rotate the grip part at the tip and change the direction, which is more effective.

  Note that the endoscope treatment tool 1 configured as described above has the same function and effect as those of the first embodiment.

  Furthermore, the configuration in which air is supplied from the cylinder 23 and the tip gripping portion 10 of the foreign material recovery unit 2 is moved forward and backward so as to approach or separate from the expansion fixing unit 11 may be as described below.

(First modification)
In the endoscope treatment tool 1 here, for example, as shown in FIGS. 10 and 11, the fixed portion 12 of the distal end gripping portion 10 of the foreign matter collecting portion 2 is connected to the distal end of the rod 25.

  The rod 25 is inserted into a hole formed in the center of a disc-shaped seal member 26 that hermetically seals the distal end opening of the circular tube portion 14 of the expansion fixing portion 11. A piston ring 27 formed of a cylindrical rubber or the like is provided at the base end accommodated in the cylinder.

  The hole formed in the center of the seal member 26 is provided with an O-ring 26a that comes into contact with the outer peripheral portion of the rod 25, so that airtightness with the rod 25 is maintained.

  The insertion pipe portion 3 here is a multi-lumen tube, and includes a first air duct 3b which is a hole formed in the center and a second air duct 3c which is a hole formed on the outer peripheral side. Is formed.

  The first and second air ducts 3 b and 3 c communicate with each other at the distal end opening of the insertion tube portion 3. The piston ring 27 is in contact with the first air duct 3b, and is provided so as to be able to advance and retreat in an airtight state.

  In addition, the insertion tube portion 3 has a proximal end portion connected to the operation portion 30 having a four-way valve structure. The operation unit 30 includes an operation button 31 and two tube connection caps 32 and 33.

  The two tube connection caps 32 and 33 have an air supply tube 34 connected to one side and an exhaust tube 35 connected to the other. The air supply tube 34 is connected to the cylinder 23.

  The operation unit 30 supplies the air from the cylinder 23 to the first air duct 3b or the second air duct 3c of the insertion tube unit 3 through the air supply tube 34 by the operation button 31, and no air is supplied. The first air duct 3b or the second air duct 3c can be switched to communicate with the exhaust tube 35.

  In the endoscope treatment tool 1 configured as described above, when air is supplied to the first air duct 3b of the insertion tube portion 3, the piston ring 27 is moved to the tip (front) side by pressurization by the air. By moving it, the tip gripping part 10 connected to the rod 25 is sent away from the extension fixing part 11.

  In accordance with this, the air in the first air duct 3 b and the second air duct 3 c on the tip side of the piston ring 27 is exhausted from the exhaust tube 35 via the operation unit 30.

  Further, when the endoscope treatment tool 1 is supplied with air to the second air duct 3c of the insertion tube portion 3, the air is supplied to the first air duct 3b communicating with the second air duct 3c at the distal end side. When the piston ring 27 is moved to the proximal end (rear side) which is the proximal side by the pressurization by the air, the distal end gripping portion 10 connected to the rod 25 is moved so as to be close to the expansion fixing portion 11. .

  Even with such a configuration, the endoscope treatment tool has a configuration similar to that of the first embodiment.

(Second modification)
The endoscopic treatment tool 1 shown here is, for example, another form of the first modification as shown in FIG. 12, and is provided with a cylinder 28 that accommodates the piston ring 27 at the distal end portion of the insertion tube portion 3. Thus, an inner sheath 36 for supplying and discharging air into the cylinder 28 is provided in the insertion tube portion 3.

  More specifically, the insertion tube portion 3 here constitutes an outer sheath, and a cylindrical cylinder 28 is formed on the inner side of the insertion tube portion 3 on the back side of the seal member 26 that seals the distal end opening of the insertion tube portion 3. It is provided so as to have a predetermined gap with the peripheral surface.

  The base end of the cylinder 28 is connected so that the distal end of a tube-like flexible inner sheath 36 is sheathed.

  The cylinder 28 communicates with the inner hole portion 28a, and a communication hole 28b that communicates with the inside of the insertion tube portion 3 is formed on the outer periphery on the distal end side. A piston ring 27 is accommodated in the hole 28 a of the cylinder 28.

  Here, the operation unit 30 (see FIG. 11) supplies air from the cylinder 23 through the air supply tube 34 into the insertion tube unit 3 or the inner sheath 36 by the operation button 31, The insertion tube 3 or the inner sheath 36 that is not supplied can be switched so as to communicate with the exhaust tube 35.

  In the endoscope treatment instrument 1 configured as described above, when air is supplied to the inner sheath 36 of the insertion tube portion 3, the air is supplied to the hole portion 28a of the cylinder 28, and the air is applied by the air. By moving the piston ring 27 to the tip (front) side by pressure, the tip gripping part 10 connected to the rod 25 is sent out so as to be separated from the expansion fixing part 11.

  In accordance with this, the air in the hole 28 a of the cylinder 28 on the tip side of the piston ring 27 and the insertion tube portion 3 is exhausted from the exhaust tube 35 through the operation portion 30. At this time, the air in the hole portion 28a on the tip side of the piston ring 27 flows into the insertion tube portion 3 from the communication hole 28b.

  In the endoscope treatment instrument 1, when air is supplied into the insertion tube portion 3, air is sent from the communication hole 28 b to the hole portion 28 a on the tip side of the piston ring 27 on the tip side of the cylinder 28. By moving the piston ring 27 toward the proximal end (rear side), which is the proximal side, by the pressurization by the air, the distal end gripping portion 10 connected to the rod 25 is moved so as to be close to the expansion fixing portion 11.

  Even with such a configuration, the endoscope treatment tool has a configuration similar to that of the first embodiment.

(Third Modification)
Here, the endoscope treatment tool 1 includes, for example, as shown in FIG. 13 and FIG. 14, in the configuration of the foreign substance recovery unit 2 provided at the distal end of the insertion tube portion 3, the distal end ( The front end gripping portion 10 provided on the front side is a fixed front end fixing portion 10a, and the extended fixing portion 11 provided on the base end (rear) side that is the hand side is a base end gripping portion 11a that is movable back and forth. It has a configuration.

  More specifically, the foreign substance recovery unit 2 includes a tubular member 40 connected to the distal end portion of the insertion tube portion 3, a distal end fixing portion 10 a fixed to the distal end of the tubular member 40, and the axial direction of the tubular member 40. And a proximal end gripping portion 11a provided so as to freely advance and retract.

  The distal end fixing portion 10a has an annular portion 41, and the direction perpendicular to the axial direction from the outer peripheral portion of the annular portion 41, that is, the outward direction around the longitudinal axis of the tubular member 40, the insertion tube portion 3, etc. A plurality of, in this case, four fixing claws 42 are radially extended toward the front.

  A substantially cylindrical magnet 45 is provided inside the annular portion 41 so as to close the opening. The distal end fixing portion 10 a is fitted to the distal end of the insertion tube portion 3.

  The proximal end gripping portion 11a has a gripping member 44 accommodated in the tubular member 40, and is orthogonal to the axial direction moving from the outer periphery of the gripping member 44, that is, the tubular member 40, the insertion tube portion. A plurality of, in this case, four gripping claw portions 43 extend radially outwards around the longitudinal axis such as 3.

  These four gripping claws 43 are extended so as to protrude from the tubular member 40 through a plurality of (herein, four) slits 40 a formed in the tubular member 40.

  The gripping member 44 is provided with a magnet 46 at the center portion on the distal end side, and an inner sheath 47 accommodated in the tubular member 40 is connected to the proximal end side. The inner sheath 47 is closed at the tip opening by the gripping member 44.

  In addition, the magnet 45 provided in the front end fixing | fixed part 10a and the magnet 46 provided in the base end holding | grip part 11a are provided so that it may mutually repel.

  In the endoscope treatment instrument 1 configured as described above, when air is supplied to the insertion tube portion 3, the air is supplied to the inner sheath 47 connected to the proximal end gripping portion 11a, and the air By moving the proximal end grasping portion 11a together with the inner sheath 47 to the distal end (front) side by pressurization by the above, the proximal end grasping portion 11a is moved to the distal end side so as to be close to the distal end fixing portion 10a.

  Further, when the supply of air into the insertion tube portion 3 is stopped, the endoscope treatment tool 1 is configured so that the proximal end gripping portion 11a is separated from the distal end fixing portion 10a by the repulsive force of the magnets 45 and 46. Move to the end side.

  Here, the endoscope treatment tool 1 has four fixed claw portions provided radially by moving the proximal end gripping portion 11a of the foreign substance collecting portion 2 to the distal end side so as to be close to the distal end fixing portion 10a. The foreign object 100 can be gripped and collected by any of the 42 and the four gripping claw portions 43.

  Even with such a configuration, the endoscope treatment tool has a configuration similar to that of the first embodiment.

(Third embodiment)
Next, a third embodiment of the present invention will be described below based on the drawings. In addition, regarding each component described in 1st and 2nd embodiment, the same code | symbol is used about the thing of the same structure, and those detailed description is abbreviate | omitted.
FIG. 15 is a perspective view showing the configuration of the foreign substance collection unit, FIG. 16 is a cross-sectional view showing the configuration of the foreign substance collection unit, and FIG. 17 is a plan view schematically showing the configuration of the endoscope treatment tool according to the modification. 18 is a cross-sectional view showing a configuration of an insertion tube portion of a modified example.

  As shown in FIGS. 15 and 16, the endoscope treatment tool 1 according to the present embodiment has a configuration in which the distal end gripping portion 10 and the expansion fixing portion 11 of the foreign substance collection portion 2 are cup-shaped.

  More specifically, the tip gripping part 10 of the foreign matter collecting part 2 has a crown-shaped tip cup 51 fixed to a base 53 provided at the tip of the operation wire 8.

  In addition, the expansion fixing portion 11 of the foreign material recovery portion 2 has a spherical crown-shaped proximal end cup 52 fixed to the distal end of a tubular member 54 connected to the distal end of the insertion tube portion 3. The tubular member 54 is formed with an outward flange 54a at the distal end, and a proximal cup 52 is fixed to the outward flange 54a.

  The distal end cup 51 and the proximal end cup 52 are disposed so that the opening side faces each other, and are formed of synthetic resin, rubber, or the like. The distal end cup 51 and the proximal end cup 52 are radially directed in a direction orthogonal to the longitudinal axis direction of the operation wire 8, that is, outward in the periphery of the longitudinal axis of the base 53, the tubular member 54, the insertion tube portion 3, and the like. The thick part is provided so as to extend.

  The endoscope treatment tool 1 configured as described above is moved closer to the proximal end cup 52 of the extension fixing portion 11 by the forward and backward movement of the distal end cup 51 of the distal end gripping portion 10 by the pulling and loosening operation of the operation wire 8. Or it is operated so as to separate.

  Therefore, the endoscope treatment tool 1 according to the present embodiment moves the distal end gripping part 10 of the foreign substance collecting part 2 to the proximal end side that is the proximal side so as to be close to the expansion fixing part 11, thereby 51 and the opening of the proximal cup 52 are closed and hermetically sealed, and the foreign object 100 can be accommodated and collected in the sphere formed by the distal cup 51 and the proximal cup 52.

(Modification)
As shown in FIG. 17, the endoscope treatment tool 1 is connected to a suction tube 55 communicating with the insertion tube portion 3, and a suction pump 56 is connected to the suction tube 55. When the distal end cup 51 of the gripping part 10 and the proximal end cup 52 of the extension fixing part 11 are sealed and formed into a spherical shape, the suction pump 56 is driven and the distal end cup 51 and the proximal end cup 52 are inserted via the insertion tube part 3. It is good also as a structure which collect | recovers the foreign material (100) accommodated in this space at the hand side.

  Furthermore, as shown in FIG. 18, the insertion tube portion 3 is preferably a multi-lumen tube having a hole portion 57 through which the operation wire 8 is inserted and a suction conduit 58 for suction.

  The endoscope treatment tool 1 described above can apply any of the configurations described in the first embodiment and the second embodiment with respect to the configuration for pulling and relaxing the operation wire 8. is there.

(Reference example)
In the endoscope treatment tool 1 of the present invention described above, various forms of the foreign substance collection unit 2 will be described. Again, the endoscope treatment tool 1 can apply any of the configurations described in the first embodiment and the second embodiment regarding the configuration for pulling and relaxing the operation wire 8. .

  FIG. 19 is a perspective view showing the configuration of the foreign matter recovery unit of the first reference example, FIG. 20 is a perspective view showing the configuration of the foreign matter recovery unit of the second reference example, and FIG. 21 is the foreign matter recovery of the third reference example. FIG. 22 is a perspective view showing a configuration of a foreign matter collection unit of a fourth reference example.

(First reference example)
As shown in FIG. 19, the foreign substance collection unit 2 of the endoscope treatment instrument 1 is configured by including a plurality of tip gripping units 10, here, three plate-like members 61. These three plate-like members 61 are elongated rectangular plates, are made of metal such as stainless steel, and have a configuration that can be deformed into an arbitrary shape.

  The endoscope treatment tool 1 here is deformed into an arbitrary shape so that the three plate-like members 61 of the distal end gripping portion 10 expand outward, and expands the distal end gripping portion 10 of the foreign matter collecting portion 2. By moving to the proximal end side, which is the proximal side, so as to be close to the fixed portion 11, the foreign material (100) can be held and collected by any of the three plate-like members 61 and the four gripping pieces 15. .

  The plate-like member 61 has a shape curved toward the front side so as to be held between the plate-like member 61 and the gripping piece 15 and collect the foreign matter 100. Further, the plate-like member 61 is further pulled and pulled into the insertion tube portion 3 to change the front end of the plate-like member 61 from the open state to the closed state. The shape is bent to the side (inside).

(Second reference example)
As shown in FIG. 20, the foreign substance collection unit 2 of the endoscope treatment tool 1 here is configured such that the distal end gripping unit 10 has a spiral portion 62 in which wires, wires, and the like are spirally formed. .

  The endoscope treatment tool 1 here also moves the distal end gripping part 10 of the foreign substance collection part 2 to the proximal side that is the proximal side so as to be close to the expansion fixing part 11, so that the spiral part 62 and the four The foreign object (100) can be held and collected by any of the gripping pieces 15.

(Third reference example)
As shown in FIG. 21, the endoscope treatment tool 1 here has a configuration in which the foreign matter collection unit 2 is provided in the form of a grasping forceps having a conventional grasping unit 70. The tip gripping part 10 here is provided in a sheath 71 on the rear side of the gripping part 70 in the gripping forceps. The distal end gripping portion 10 is provided with a plurality of, in this case, four gripping claw portions 63 radially outwardly around the longitudinal axis of the sheath 71. In addition, an outer sheath (not shown) provided with the expansion fixing portion 11 is extrapolated to the sheath 71.

  Here, the endoscope treatment tool 1 slides the sheath 71 toward the proximal side with respect to an outer sheath (not shown) so that the distal end gripping portion 10 of the foreign matter collecting portion 2 is brought close to the expansion fixing portion 11. The foreign object (100) can be clamped and collected by any one of the four gripping claws 63 and the four gripping pieces 15 by moving to the proximal side, which is the proximal side.

  The endoscope treatment tool 1 collects the foreign object (100) in the front side by the grip part 70 on the distal end side, and separates the other foreign object (100) by the foreign object collecting part 2 on the hand side. Can be recovered.

(Fourth reference example)
As shown in FIG. 22, the endoscope treatment tool 1 has a plurality of tip gripping portions 10, here, three wires 64, and a cylindrical shape in the middle part of each of these three wires 64. The protrusion 65 is fixed. These three wires 64 are formed so as to expand radially outwardly around the longitudinal axis of the insertion tube portion 3 or the like.

  The endoscope treatment tool 1 is also moved to the proximal side that is the proximal side so that the distal end gripping portion 10 of the foreign substance collecting portion 2 is close to the expansion fixing portion 11, so that the three wires 64 and 4 are moved. The foreign object (100) can be held and collected by any one of the two gripping pieces 15.

  Furthermore, in this endoscope treatment tool 1, when the distal end gripping portion 10 moves to the proximal end side, the three wires 64 close inward as they are accommodated in the circular tube portion 14 of the expansion fixing portion 11. The foreign matter (100) may be sandwiched between the three wires 64 and the foreign matter (100) sandwiched by the protrusions 65 provided on the three wires 64 may be retained and recovered.

  The invention described in the above-described embodiment is not limited to the embodiment and modifications, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

  For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the described requirements can be deleted if the stated problem can be solved and the stated effect can be obtained. The configuration can be extracted as an invention.

DESCRIPTION OF SYMBOLS 1 ... Endoscopic treatment tool 2 ... Foreign substance collection part 3 ... Insertion pipe part 3a ... Lumen 3b, 3c ... Air duct 4 ... Housing part 5 ... Operation handle 6 ... Fixed handle 7 ... Handle part 8 ... Operation wire 10, 10a ... Tip fixing portion 11 ... expansion fixing portion 11a ... proximal end gripping portion 12 ... fixing portion 13 ... gripping wire 14 ... circular tube portion 15 ... gripping piece 16 ... magnet 17 ... bellows tube 17a ... space 20 ... actuator 21 ... tube 22 ... operation Valve 23 ... cylinder 25 ... rod 26 ... seal member 26a ... ring 27 ... piston ring 28 ... cylinder 28a ... hole 28b ... communication hole 30 ... operation part 31 ... operation button 32, 33 ... tube connection cap 34 ... air supply tube 35 ... exhaust tube 36 ... inner sheath 40 ... tubular member 40a ... slit 41 ... annular part 42 ... fixed claw part 43 ... gripping claw part 44 ... gripping members 45, 4 ... Magnet 47 ... Inner sheath 51 ... Tip cup 52 ... Base end cup 53 ... Base 54 ... Tubular member 54a ... Outward flange 55 ... Suction tube 56 ... Suction pump 57 ... Hole 58 ... Suction conduit 61 ... Plate-like member 62 ... Spiral part 63 ... gripping claw part 64 ... wire 65 ... projection part 70 ... gripping part 71 ... sheath 100 ... foreign matter

Claims (8)

An endoscope treatment tool used by being inserted into a treatment tool channel of an endoscope,
A sheath inserted into the treatment instrument channel;
A foreign substance recovery part provided at the tip of the sheath;
A gripping part that is provided in the foreign matter recovery part, is advanced and retracted in the longitudinal direction of the sheath, and extends in an outer diameter direction perpendicular to the longitudinal axis of the sheath;
A fixed portion provided in the foreign matter collecting portion so as to face the gripping portion and extending in an outer diameter direction perpendicular to the longitudinal axis of the sheath;
An endoscopic treatment tool comprising:   The endoscopic treatment tool according to claim 1, wherein the grip portion is a plurality of wires extending radially. The fixing portion has a plurality of gripping pieces extending radially,
The endoscopic treatment tool according to claim 1 or 2, wherein the plurality of grip pieces have elasticity on the grip portion side and are provided to be inclined at a predetermined angle.   The endoscopic treatment instrument according to claim 3, wherein the fixing portion includes a bellows tube extending and contracting along a longitudinal axis on a proximal end side of the plurality of gripping pieces.   The endoscopic treatment tool according to claim 4, wherein the bellows tube has a double structure in which a space is formed, and extends when air is supplied into the space. Has an actuator that can be expanded and contracted by pressurization by air intake or decompression by exhaust
The endoscopic treatment tool according to any one of claims 1 to 5, wherein the gripping part advances and retracts in the longitudinal direction of the sheath by driving the actuator.   The endoscopic treatment tool according to claim 1, wherein each of the grip portion and the fixing portion is a spherical crown cup.   A suction pump is provided for sucking foreign matter in a space sealed by closing each opening of the cup of the grip portion and the cup of the fixed portion to the hand side through the sheath. The endoscope treatment tool according to claim 7.

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