JP4218965B2 - Endoscope gripping device - Google Patents

Description

  The present invention relates to an endoscope gripping apparatus for gripping a lesioned part of a patient using a magnetic anchor that can be guided by a magnetic field when the lesioned part is excised under endoscopic observation.

As one aspect of surgery using an endoscope, a technique of lifting and excising a lesion using a magnetic anchor has been known, and the present applicant has filed an application for an endoscopic grasping device used in this technique. (Patent Documents 1 and 2). Of these, the endoscope gripping device of Patent Document 2 holds a magnetic anchor at the tip of an introduction tube that can be inserted into a forceps channel of the endoscope, and is anchored inside the introduction tube by a flexible connecting member. The grasping forceps unit connected to is inserted. The grasping forceps unit has a grasping clip with a variable opening angle for grasping a target portion inside the object, and an outer tube that holds the grasping clip and controls the opening angle at an axial relative position with the retaining clip. is doing. Further, an operation wire capable of pulling operation and a pushing member are inserted into the introduction tube, and the hook at the distal end of the operation wire and the wire latching portion of the grasping forceps unit are connected by a loop wire. In this endoscope grasping device, the anchor and the grasping forceps unit are pushed out from the introduction tube by the pushing member, the loop wire is pulled through the operation wire, the target portion is grasped, and the loop wire is cut and flexibly connected. By making the anchor and the grasping forceps unit connected by the members free from the introduction tube, the target site using the anchor can be operated.
JP 2004-105247 A Japanese Patent Application No. 2003-95348

  In this endoscope gripping device, the anchor and the gripping forceps unit are made free from the introduction tube by cutting the loop wire. However, in the conventional product, there are various places where the loop wire is cut, and the loop wire cut into the body may fall. If the loop wire falls into the body, it may damage the mucous membrane. In addition, the grip clip of the grip forceps unit may be formed of a press-molded product of a metal material. In that case, a punching flash is formed on the press-molded gripping clip. Therefore, if the punching of the press-molded grip clip is bent outward, the grip clip exposed in the body may damage the mucous membrane.

  Accordingly, an object of the present invention is to obtain an endoscope gripping device in which a cut loop wire is reliably left in an introduction tube. It is another object of the present invention to obtain an endoscope gripping device in which a punching beam formed on a press-molded gripping clip does not cause damage to the mucous membrane.

  In an aspect in which the loop wire is reliably left in the introduction tube, the endoscope gripping apparatus of the present invention is an introduction tube that can be inserted into the forceps channel of the endoscope; an anchor that is held at the distal end portion of the introduction tube; A gripping clip having a variable opening angle for gripping a target portion inside the object, and an outer tube that holds the gripping clip and controls the opening angle at an axial relative position with the gripping clip. Gripping forceps unit held inside; flexible connecting member that connects the anchor and the grasping forceps unit; an operation wire inserted into the introduction tube so as to be capable of being pulled; a hook at the distal end of the operation wire, and a wire latching portion of the grasping forceps unit A loop wire that is hooked between and connected to each other; a grasping forceps unit disposed in the introduction tube and an extrusion member that pushes the anchor out of the introduction tube; -Pull out the grasping forceps unit from the introduction tube and pull the loop wire through the operation wire to cut the loop wire so that the anchor and the grasping forceps unit connected by the flexible connecting member are free from the introduction tube. An endoscope gripping device, wherein the loop wire is hooked, and the hook and the wire hooking portion are connected to the wire hooking portion of the hook at the tip of the operation wire and the wire hooking portion of the gripping forceps unit. Provided a wire cutting easy portion where the loop wire is cut at the wire hooking portion when a force for pulling the loop wire is applied between the hook and a wire cutting difficult portion where the loop wire is difficult to cut It is characterized by.

“Easy to cut wire” and “difficult to cut wire” are relative concepts, and means a configuration in which the loop wire is cut on the easy-to-cut portion side and not cut on the hard-to-cut portion side in a normal use mode. Specifically, for example, the wire cutting easy portion can be configured from a knife edge, and the wire cutting difficult portion can be configured from a hook. Alternatively, in another expression, the wire-cutting easy portion can be constituted by a steeply bent edge portion where the loop wire is bent sharply, and the wire-cut difficult portion can be constituted by a slowly bent guide portion where the loop wire is bent gently. Even a sharp bend edge, called a knife edge, does not require (but does not have to be) a cutting property that can be cut immediately when tension is applied to the loop wire. When the tension is further applied after the end of the process, the cutting ability is given so as to be cut for the first time.

  Specifically, for example, the wire latching portion can be a bent portion of a grip clip formed by press-molding a metal material, and the wire-cutting easy portion can be a bent portion with the punching beam of the press-formed grip clip on the inside. It can be.

  The loop wire can be selected from a resin material or a metal material as long as it has a cutting property (non-cutting property) as described above. That is, the configuration of the wire cutting easy portion and the difficult cutting portion can be determined according to the properties of the loop wire.

  Further, the present invention provides an introduction tube that can be inserted into a forceps channel of an endoscope in an aspect of an endoscope gripping device in which a punching beam formed on a press-molded grip clip does not damage a mucous membrane; Anchor held at the distal end; gripping clip with variable opening angle for gripping the target portion inside the object, and outer tube that holds the gripping clip and controls the opening angle at a relative position in the axial direction with the holding clip A grasping forceps unit that is held inside the introduction tube; a flexible coupling member that connects the anchor and the grasping forceps unit; an operation wire that is inserted in the introduction tube so as to be capable of being pulled; and a hook at the tip of the operation wire; A loop wire that is hooked between the wire latching portions of the grasping forceps unit and connects them; pushes out the grasping forceps unit and the anchor disposed in the introduction tube from the introduction tube An extrusion member; the anchor and the grasping forceps unit are pushed out from the introduction tube by the extrusion member, and the loop wire is cut by pulling the loop wire through the operation wire; Endoscopy gripping device that frees the gripping forceps unit from the introduction tube. The gripping clip is made of a metal material press-molded product, and this press-molded gripping clip is bent with the punching beam inside. The bent portion is inserted into the outer tube.

  According to the present invention, when the loop wire is pulled with a strong force of a predetermined level or more, it is cut on the wire cutting easy portion side, so that the cut loop wire does not remain in the body with the grasping forceps unit, The risk of the loop wire damaging the mucous membrane in the body can be reduced. In addition, since the press-molded gripping clip is bent with the punched-out punch inside, the risk of the gripping clip damaging the mucous membrane can be reduced.

Hereinafter, an embodiment of an endoscope gripping apparatus 1 according to the present invention will be described.
FIG. 1 shows that an endoscope gripping device 1 is inserted into an endoscope 2 capable of observing and treating a lesion (target site) 130 (see FIGS. 9 to 14) of a patient (target). Indicates the state. The endoscope 2 includes an insertion portion 3 to be inserted into a patient's body, a distal rigid portion 60 disposed at the distal end portion of the insertion portion 3, and a treatment instrument such as an endoscope gripping device 1 behind the insertion portion 3. A forceps insertion opening 90 and a forceps channel 61 (see FIG. 9) communicating between the forceps insertion opening 90 and the distal end rigid portion 60.

As shown in FIGS. 2 and 3, the endoscope gripping apparatus 1 includes a hollow cylindrical introduction tube 70 inserted into the forceps channel 61, and a push member 71 provided along the inner wall of the introduction tube 70. The operation wire 80 inserted into the inside of the pushing member 71, the magnetic anchor 30 fitted to the distal end portion of the introduction tube 70, and the grasping forceps unit 100 disposed behind the magnetic anchor 30 are included.

  The magnetic anchor (anchor) 30 is made of a ferromagnetic material and is held at the distal end portion of the introduction tube 70. As the ferromagnetic material, for example, a magnetic induction member such as an electromagnet or a permanent magnet can be used. By using these magnetic induction members, the operator can perform suction control of the magnetic anchor 30 from outside the patient's body. Furthermore, as a magnetic body used for the magnetic anchor 30, magnets such as platinum magnet, rare earth magnet, terbium / dysprosium / iron alloy can be used in addition to pure iron and iron alloy.

The grasping forceps unit 100 includes the grasping clip 10 and the outer tube 40, and is disposed behind the magnetic anchor 30 so as to be located inside the introduction tube 70.
4 to 6 show a flexible gripping clip 10 made of a metal material. The press-molded grip clip 10 is obtained by bending a material press-molded into a predetermined planar shape with a press die as shown in FIG. 4 into a substantially U-shape. When the press-molding grip clip 10 is bent, a punching beam formed by press molding is set inside. The grip clip 10 obtained in this way includes long plate-like members 11 and 12 and a wire latching portion (bent portion) 10a that face each other. As shown in the cross-sectional shape of FIG. 6, the wire latching portion 10 a is a bent portion having a punched beam (steep bent edge portion) 14 on the inside, and this punched beam forms a wire cutting easy portion 13. .

Claw portions 11a and 12a bent inward are formed at the tip portions of the plate-like members 11 and 12 opposite to the wire latching portions 10a. At the same position in the longitudinal direction of the plate-like members 11 and 12, by bending the plate-like members 11 and 12, the projections 11b and 12b projecting outward from the front and rear portions thereof, and the projection narrowed inward. Inclined portions 11c and 12c that extend outward again from the front ends of the portions 11b and 12b, and flat front end portions 11d and 12d that extend from the front ends of the inclined portions 11c and 12c to the claw portions 11a and 12a are provided. For this reason, when the plate-like members 11 and 12 are urged so as to approach each other, the claw portions 11a and 12a can grip the lesioned part 130 inside the patient. The opening angle of the grip clip 10 that grips the lesioned part 130 can be freely changed. Note that the gripping clip 10 may have three or more plate-like members as long as the lesioned part 130 can be gripped.

As shown in FIG. 7, the gripping clip 10 has rear portions 11 e and 12 e positioned in the vicinity of the wire hooking portion 10 a held in a substantially cylindrical outer tube 40. The outer tube 40 has an inner diameter with which the outer surface of the grip clip 10 can come into contact, and can be formed of, for example, a stainless steel pipe, a plastic tube, or a superelastic alloy. The outer tube 40 is located in the large diameter portion 46 into which the wire latching portion 10 a and the rear portions 11 e and 12 e of the grip clip 10 are inserted, the small diameter portion 47 provided behind the large diameter portion 46, and the small diameter portion 47. And a cylindrical shape having a pair of slits 41 and 42 opposed in the radial direction. The slits 41 and 42 extend in parallel to the axis of the outer tube 40, and the rear ends thereof are open.
The outer tube 40 is in contact with the grip clip 10 and is movable in the axial direction. Therefore, since the grip clip 10 has the shape as described above, the outer tube 40 can move in the axial direction and change the relative position with the grip clip 10 to control the opening angle of the grip clip 10. it can. In addition, the slit provided in the small diameter part 47 may be one.

The magnetic anchor 30 and the grasping clip 10 (gripping forceps unit 100) are connected by a flexible connecting member 20 having flexibility. The flexible connecting member 20 is provided inside one end of the magnetic anchor 30 after passing through the inside of the wire latching portion 10 a and being disposed outside the outer tube 40 (gripping forceps unit 100) via the slits 41 and 42. The hole 31 is inserted and fixed. As the flexible connecting member 20, for example, a surgical suture, a fishing line, or a metal wire can be used.
Thus, since the grasping clip 10 (gripping forceps unit 100) and the magnetic anchor 30 are coupled via the flexible coupling member 20, the operator grasps the magnetic anchor 30 by performing suction control from outside the patient's body. The clip 10 can be pulled in a desired direction (see FIG. 14).

  A hook 81 is provided at the distal end of an operation wire 80 that is inserted into the introduction tube 70 so as to be capable of being pulled. The hook 81 is fixed to the operation wire 80 by a joining means such as an adhesive, solder, or brazing. The operation wire 80 is sufficiently longer than the introduction tube 70, and the rear end portion of the operation wire 80 further extends from the introduction tube 70 protruding outward from the forceps insertion port 90 of the endoscope 2. A concave portion 82 is formed in the central portion of the hook 81. The concave portion 82 constitutes a wire cutting difficult portion 83 having a larger curvature than the steep bent edge portion 14 (wire cutting easy portion 13) formed by punching formed on the wire hooking portion 10a of the grip clip 10.

Between the recess 82 of the hook 81 and the wire latching portion 10a of the grasping forceps unit 100, a loop wire 50 that connects them is latched. The loop wire 50 can be made of, for example, a synthetic resin material or a metal material as long as it is a material that can be cut when pulled with a strong force of a predetermined level or more. The loop wire 50 is in contact with the wire cutting easy portion 13 of the wire hooking portion 10 a and the wire cutting difficult portion 83 of the recess 82. The wire cutting easy portion 13 bends the loop wire 50 sharply and concentrates stress on the bent portion, whereas the wire cutting difficult portion 83 gently bends the loop wire 50 and does not concentrate stress on one place. That is, the wire-cutting easy portion 13 has a shape that causes a large stress concentration on the loop wire 50, and the wire-cutting difficult portion 83 has a shape that does not cause a relative stress concentration.

  FIG. 8 shows a state in which the loop wire 50 is hooked on the wire cutting easy portion 13 (the steep bent edge portion 14). In this embodiment, the steep bent edge portion 14 is a punching beam formed when the holding clip 10 is press-molded, and therefore, a force for pulling the loop wire 50 is applied between the hook 81 and the wire hooking portion 10a. When this occurs, stress concentrates on the steep bent edge portion 14 of the wire latching portion 10a, and the loop wire 50 is cut. On the other hand, the wire cutting difficulty portion 83 is a convex surface having a gently curved surface, and includes the gently bending guide portion 84 in which the loop wire 50 bends gently, so that no large stress concentration occurs in the loop wire 50. Cutting does not occur at the wire cutting difficult portion 83.

An extrusion member 71 is disposed on the inner wall of the introduction pipe 70 in the longitudinal direction of the introduction pipe 70. The pushing member 71 is movable relative to the introduction tube 70 and pushes out the grasping forceps unit 100 and the magnetic anchor 30 from the introduction tube 70. A regulating tube 72 is fixed to the distal end of the pushing member 71 on the distal end hard portion 60 side by a fixing means such as an adhesive, solder, or brazing. The regulation tube 72 is provided with a stepped portion 73, and the outer diameter of the front portion 74 of the stepped portion 73 is substantially the same as the inner diameter of the introduction tube 70. On the other hand, the outer diameter of the rear portion 75 whose outer diameter is smaller than that of the front portion 74 is substantially the same as the inner diameter of the hollow cylinder formed by the pushing member 71. Therefore, when the extrusion member 71 is fixed to the outer periphery of the rear portion 75, the outer periphery of the hollow cylinder formed by the extrusion member 71 and the outer periphery of the front portion 74 are substantially on the same plane.

  The inner diameter of the front portion 74 is set larger than the inner diameter of the rear portion 75. Further, the inner diameter of the front portion 74 and the inner diameter of the rear portion 75 are substantially the same as the outer diameter of the large-diameter portion 46 and the outer diameter of the small-diameter portion 47 of the outer tube 40, respectively. For this reason, the outer cylinder tube 40 can be inserted into the restriction tube 72, and the movement of the outer tube 40 is restricted when the stepped portion 45 comes into contact with the distal end surface 76 of the restriction tube 72.

9 to 14 show the operation of introducing the magnetic anchor 30 and the grasping forceps unit 100 into the body, the grasping operation of the lesioned part 130 by the grasping clip 10, and the pulling operation of the magnetic anchor 30 (lesioned part 130). The grasping forceps unit 100 and the magnetic anchor 30 are introduced into the body by introducing the insertion portion 3 of the endoscope 2 into the body. An introduction tube 70 is inserted into the distal end rigid portion 60 of the insertion portion 3, a magnetic anchor 30 is disposed at the distal end of the introduction tube 70, and a grasping forceps unit 100 is disposed behind the magnetic anchor 30. Yes. In the grasping forceps unit 100, the claws 11 a and 12 a of the grasping clip 10 are arranged facing the distal end side of the distal end rigid portion 60.

Prior to introducing the magnetic anchor 30 and the grasping forceps unit 100 into the body of the patient, the grasping forceps unit 100 and the magnetic anchor 30 are disposed in the introduction tube 70 as follows.
The grasping forceps unit 100 and the magnetic anchor 30 are inserted into the introduction tube 70 in a state of being connected via the flexible connecting member 20. At the time of insertion, the loop wire 50 that has been passed through the holding clip 10 in advance is hooked on the recess 82 of the hook 81 that is fixed to the distal end of the operation wire 80 that is inserted into the introduction tube 70. In this state, the rear end portion of the outer tube 40 is inserted into the restriction tube 72. This insertion operation is performed when the stepped portion 45 of the outer tube 40 and the front end portion of the front portion 74 are abutted, and the stepped portion 73 of the restriction tube 72 and the rear end portion of the small diameter portion 47 are abutted. The insertion of 40 is restricted and the process ends.
In this manner, the grasping forceps unit 100 is first inserted into the introduction tube 70, and then a part of the magnetic anchor 30 is fitted to the distal end portion of the introduction tube 70. In addition, since the flexible connecting member 20 has a sufficient length that does not prevent the magnetic anchor 30 from being placed in front of the gripping clip 10, the magnetic anchor 30 and the gripping forceps unit 100 ( The grip clip 10 and the outer tube 40) are arranged in a straight line.

The grip clip 10 and the magnetic anchor 30 are introduced into the patient's body as follows. First, the insertion part 3 of the endoscope 2 is inserted into the patient's body. Thereafter, the distal end portion of the introduction tube 70 is exposed from the distal end rigid portion 60 to the inside of the body. The magnetic anchor 30 and the grasping forceps unit 100 are pushed out from the introduction tube 70 by the pushing member 71.
That is, the pushing member 71 urges the restriction tube 72 forward, and the grasping forceps unit 100 is pushed forward. The tip of the grip clip 10 of the grip forceps unit 100 abuts on the rear end of the magnetic anchor 30. From this state, when the restriction tube 72 is further urged forward, the magnetic anchor 30 fitted to the distal end portion of the introduction tube 70 is released.
As shown in FIG. 9, the grasping forceps unit 100 is exposed from the distal end of the introduction tube 70 to the body of the patient, and the grasping clip 10 and the outer tube 40 of the grasping forceps unit 100 are aligned in the longitudinal direction of the introduction tube 70. Placed in. The magnetic anchor 30 hangs downward due to gravity. Therefore, if the endoscope 2 is operated so that the distal rigid portion 60 faces the lesioned portion 130, the introduction tube 70 disposed in the distal rigid portion 60 also faces the lesioned portion 130, so that the operator can easily In addition, the tip of the grip clip 10 can be directed to the lesioned part 130.

As shown in FIGS. 10 and 11, the gripping operation of the gripping clip 10 to the lesioned part 130 is performed as follows.
First, in order to open the flat front end portions 11d and 12d, the operation wire 80 is moved relative to the pushing member 71 and the restriction tube 72 to pull the operation wire 80 so that the convex portions 11b and 12b are moved to the outer tube. Pull into 40. Since the convex portions 11b and 12b drawn into the outer tube 40 are in contact with the inner wall of the outer tube 40, they bend in a direction approaching each other. By bending the convex portions 11b and 12b in this way, the flat front end portions 11d and 12d are separated from each other, and the front end side of the grip clip 10 exposed from the outer tube 40 is opened as shown in FIG. .

The gripping clip 10 opened in this manner is moved toward the lesioned part 130 by moving the pusher member 71, the restriction tube 72 and the operation wire 80 together so that the relative position between the gripping clip 10 and the outer tube 40 is not changed. To proceed. By closing the grasping clip 10 when the tip of the grasping clip 10 reaches a desired position, the lesioned part 130 can be grasped by the grasping clip 10.
In order to close the grip clip 10, the inclined portions 11 c and 12 c of the grip clip 10 are moved into the outer tube 40 by pulling the operation wire 80 and moving it relative to the pushing member 71 and the restriction tube 72. Pull in. The inclined portions 11c and 12c drawn into the outer tube 40 are in contact with the inner wall of the outer tube 40, and therefore bend in a direction approaching each other, and accordingly, the flat front end portions 11d and 12d move toward each other. Therefore, as shown in FIG. 11, the tip end side of the grip clip 10 exposed from the outer tube 40 is closed. In this way, the grasping operation of the grasping forceps unit 100 and the magnetic anchor 30 to the lesioned part 130 is completed.

Next, as shown in FIGS. 12 and 13, the separation operation of the grasping forceps unit 100 and the magnetic anchor 30 is performed as follows. When the loop wire 50 is pulled strongly through the operation wire 80, the loop wire 50 is cut at a position where it abuts against the steep bent edge portion 14 of the wire cutting easy portion 13. Therefore, the magnetic anchor 30 and the grasping forceps unit 100 restrained in the introduction tube 70 by the loop wire 50 are free from the introduction tube 70. Thereafter, in a state where the loop wire 50 is engaged with the hook 81, the pushing member 71, the restriction tube 72, and the operation wire 80 are retracted into the introduction tube 70 to collect them.
As described above, the loop wire 50 is cut at the wire cutting easy portion 13 because the force related to the loop wire 50 is dispersed (no stress concentration occurs) at the wire cutting difficult portion 83, and the wire cutting is easy. This is because the force related to the loop wire 50 is concentrated at the portion 13 (stress concentration occurs).

  The wire cutting easy portion 13 can also be constituted by a specially formed knife edge without using a press burr. A knife edge 13X indicated by a chain line in FIG. 6 is a specially formed inside of the wire latching portion 10a in order to facilitate the cutting of the loop wire 50 (to cause a large stress concentration in the loop wire 50). This is shown schematically.

  As shown in FIG. 14, the lesioned part 130 is pulled by applying a suction force to the magnetic anchor 30 from outside the patient's body. The raised lesioned part 130 can be excised with an incision tool such as a high-frequency knife.

  In addition, in the grip clip 10 formed by press-molding a metal material, if the molding burr is bent inward, the grip clip does not have a risk of damaging the mucous membrane as an effect independent of the effect of easy cutting of the loop wire 50. Is obtained.

1 is an overview diagram showing an overall configuration of an endoscope according to an embodiment of the present invention. It is a longitudinal cross-sectional view which shows the structure of the anchor which concerns on embodiment of this invention, a holding forceps unit, a flexible connection member, and a loop wire. It is a cross-sectional view which shows the structure of the anchor which concerns on embodiment of this invention, a holding forceps unit, a flexible connection member, and a loop wire. It is a figure which shows the press punching state of the holding | grip clip which concerns on embodiment of this invention. It is an external view of the holding | grip clip which concerns on embodiment of this invention. It is sectional drawing along the VI-VI line of FIG. It is a figure which shows the accommodation state of the introduction force pipe | tube of the holding forceps unit and flexible connection member which concerns on embodiment of this invention. It is a figure which shows the state which connected the grasping forceps unit and flexible coupling member which concern on embodiment of this invention. It is a figure showing the state where the grasping clip and anchor concerning an embodiment of the present invention were exposed to the exterior of an introduction pipe. It is a partial sectional view showing the state where the holding clip concerning the embodiment of the present invention opened. It is a partial sectional view showing the state where the grasping clip concerning the embodiment of the present invention grasped the object part. It is a side view showing the state where a part of loop wire concerning an embodiment of the present invention was cut. It is a side view which shows the state by which the grasping forceps unit and anchor which concern on embodiment of this invention were made free from the introduction tube. It is a figure showing the state where the anchor concerning the embodiment of the present invention is pulled.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Endoscope grasping device 2 Endoscope 10 Grasping clip 10a Wire latching part 11 12 Plate member 11a 12a Claw part 11b 12b Projection part 11c 12c Inclination part 11d 12d Plane front end part 11e 12e Rear part 13 Wire cutting easy part 13X Knife edge 14 Steep bend edge 20 Flexible connecting member 30 Magnetic anchor (anchor)
31 Hole 40 Outer tube 41 42 Slit 45 Stepped portion 46 Large diameter portion 47 Small diameter portion 50 Loop wire 60 Tip rigid portion 61 Forceps channel 70 Introduction tube 71 Push-out member 72 Restriction tube 73 Step portion 74 Front portion 75 Rear portion 80 Operation Wire 81 Hook 82 Recess 83 Wire cutting difficult part 84 Slow bending guide part 90 Forceps insertion port 100 Grasping forceps unit 130 Lesions

Claims (6)

An introduction tube that can be inserted into the forceps channel of the endoscope;
An anchor held at the tip of the introduction tube;
A gripping clip having a variable opening angle for gripping a target portion inside the target object, and an outer tube that holds the gripping clip and controls the opening angle at a relative position in the axial direction with the gripping clip. Gripping forceps unit held inside
A flexible connecting member for connecting the anchor and the grasping forceps unit;
An operation wire inserted into the introduction pipe so as to be capable of being pulled;
A loop wire that is hooked between the hook at the distal end of the operation wire and the wire hooking portion of the gripping forceps unit to connect the two;
An extruding member disposed in the introduction tube to push out the grasping forceps unit and the anchor from the introduction tube;
With
The anchor and the grasping forceps unit are pushed out from the introduction tube by the pushing member, and the loop wire is cut through the operation wire to cut the loop wire and introduce the anchor and the grasping forceps unit connected by the flexible connecting member. An endoscope gripping device that is free from a tube,
Of the hook at the distal end of the operation wire and the wire latching portion of the grasping forceps unit, the loop wire is pulled between the hook and the wire latching portion. An endoscope comprising a wire cutting easy portion where a loop wire is cut at the wire latching portion when a force is applied, and a wire cutting difficult portion where the loop wire is difficult to cut. Gripping device. 2. The endoscope gripping apparatus according to claim 1, wherein the wire cutting easy portion is a sharp bending edge portion where the loop wire is bent sharply, and the wire cutting difficult portion is a gentle bending guide portion where the loop wire is bent gently. Endoscope gripping device. The endoscope gripping apparatus according to claim 2, wherein the steeply bent edge portion is formed of a knife edge-like edge. The endoscope gripping device according to any one of claims 1 to 3, wherein the wire latching portion is a bent portion of a grip clip formed by press-molding a metal material, and the wire cutting easy portion is the press An endoscope gripping device, which is the bent portion with a punching beam of a formed gripping clip inside. The endoscope gripping apparatus according to any one of claims 1 to 3, wherein the loop wire is made of a resin material or a metal material. An introduction tube that can be inserted into the forceps channel of the endoscope;
An anchor held at the tip of the introduction tube;
A holding clip having a variable opening angle for holding a target portion inside the object, and an outer tube that holds the holding clip and controls the opening angle at an axial relative position with the holding clip. Gripping forceps unit held inside
A flexible connecting member for connecting the anchor and the grasping forceps unit;
An operation wire inserted into the introduction pipe so as to be capable of being pulled;
A loop wire that is hooked between the hook at the distal end of the operation wire and the wire hooking portion of the gripping forceps unit to connect the two;
An extruding member disposed in the introduction tube to push out the grasping forceps unit and the anchor from the introduction tube;
With
The anchor and the grasping forceps unit are pushed out from the introduction tube by the pushing member, and the loop wire is cut through the operation wire to cut the loop wire and introduce the anchor and the grasping forceps unit connected by the flexible connecting member. An endoscope gripping device that is free from a tube,
The gripping clip is made of a metal material press-molded product, and the press-molded gripping clip is bent with a punching beam inside, and the bent portion is inserted into the outer tube. .

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