clamp conveyor

Abstract

A clamp transport device includes: a clamp unit including a clamp and a tubular clamp holding member housing at least a proximal end of the clamp; an operating line for operating the clamp; and a connecting member connecting the clamp and the operating line. The clamp transport device includes a vibration suppression mechanism for suppressing vibration between the connecting member and the clamp. The clamp transport device of the present invention is capable of suppressing vibration and corresponding relative displacement of the clamp and the connecting member during movement within a first tube, preventing the clamp from detaching from the connecting member.

Description

Technical Field

[0001] This invention relates to a clamp delivery device for ligating tissues. Background Technology

[0002] Various clamp delivery devices are known. For example, Japanese Patent Application Publications JP2002191609A and JP2004121485A disclose clamp delivery devices for ligating tissue. These clamp devices include an insertion member, a clamp unit, and a clamp operating member. The insertion member is inserted into an endoscopic forceps channel inserted into a body cavity. The clamp unit includes an openable and closable clamp, which is detachably disposed at the distal end of the insertion member. The clamp operating member includes an external operating section and an operating line. The external operating section protrudes at the proximal end of the insertion member. The operating line extends from the external operating section to the distal end of the insertion member and connects to the clamp unit. By operating the external operating section, the clamp of the clamp unit can be opened and closed.

[0003] Reference Figure 1 Figure 6 illustrates this existing clamp delivery device for ligating living tissue.

[0004] like Figure 1 As shown, a conventional clamp delivery device for ligating living tissue includes an insertion member 10. The insertion member 10 has a distal end 10a and a proximal end 10b, and a channel 10c extends between the distal end 10a and the proximal end 10b. With the distal end 10a as the tip, the insertion member 10 is inserted into the clamp channel or sheath of an endoscope (not shown) inserted into the body cavity of a living organism.

[0005] The aforementioned existing clamp conveying device further includes a clamp unit 14. The clamp unit 14 includes a clamp 12, which is detachably disposed at the distal end 10a of the insertion member 10. The clamp 12 of the clamp unit 14 includes two elongated arms 12c. The clamp 12 has a distal end 12a and a proximal end 12b, the proximal ends 12b being connected to each other. The clamp 12 is capable of opening and closing at the distal end 12a.

[0006] The aforementioned existing clamping conveying device further includes a clamping operating component 16. The clamping operating component 16 is capable of opening and closing the clamp 12 of the clamping unit 14. The clamping operating component 16 includes an outer operating portion 16a and an operating line 16b. The outer operating portion 16a protrudes at the proximal end 10b of the insertion member 10. The operating line 16b extends from the outer operating portion 16a to the distal end 10a of the insertion member 10 within the channel 10c of the insertion member 10 and is connected to the clamping unit 14. By operating the outer operating portion 16a, the clamp 12 of the clamping unit 14 can be opened and closed.

[0007] Below, refer to Figure 1 , Figure 2A and Figure 2BThe structure of the existing clamp unit 14 is described below. The clamp unit 14 includes a clamp holding member 18. The diameter of the clamp holding member 18 is smaller than the opening diameter of the channel 10c at the distal end 10a of the insertion member 10. The clamp holding member 18 has a clamp advance / retreat channel 18a. The clamp advance / retreat channel 18a extends along the longitudinal centerline of the channel 10c and holds the clamp 12 in the forward and backward states. When the clamp 12 moves and extends out of or retracts into the clamp advance / retreat channel 18a, the outer surface of the arm 12c of the clamp 12 will slide into contact with the inner circumferential surface of the clamp advance / retreat channel 18a, causing the arm 12c to open and close. The clamp advance / retreat channel 18a is also referred to as a pressure tube or pressing channel, which is used to receive the clamp 12 by pressing it. The clamp holding member 18 may include a first tube and a second tube connected to the first tube. The second tube is located on the proximal side of the first tube.

[0008] The clamp unit 14 further includes a pair of engaging portions 20. The pair of engaging portions 20 are disposed on the outer surface of the second tube and are resiliently openable and closeable radially. Each engaging portion 20 is elongated in the longitudinal direction of the clamp advance / retreat channel 18a. When the clamp holding member 18 retracts into the opening of the channel 10c at the distal end 10a of the insertion member 10, each engaging portion 20 is pressed by the inner circumferential surface of the channel 10c, resiliently bending radially inward relative to the clamp advance / retreat channel 18a (i.e., closing). When the clamp holding member 18 extends out of the opening of the channel 10c, each engaging portion 20 resiliently expands radially (i.e., opening). The proximal end of the resiliently opened engaging portion 20, opposite the distal end 10a in the longitudinal direction of the clamp advance / retreat channel 18a, abuts against the edge of the opening of the channel 10c at the distal end 10a of the insertion member 10 in the direction along the longitudinal centerline of the channel 10c, preventing the clamp holding member 18 from retracting into the opening of the channel 10c.

[0009] The clamp unit 14 further includes a connecting member 22. The connecting member 22 is disposed within the clamp advance / retreat channel 18 of the clamp holding member 18 and is movable along the extending direction of the clamp advance / retreat channel 18. One end of the connecting member 22 is connected to the proximal end 12b of the clamp 12. The other end of the connecting member 22 is connected to the engagement portion 16c of the operating line 16b in the clamp operating member 16. Under the operation of the clamp operating member 16, the connecting member 22, together with the clamp 12, moves along the extending direction of the clamp advance / retreat channel 18a. The connecting member 22 has a breakable portion 22a. When a tensile force exceeding a predetermined value is applied by the clamp operating member 16, the breakable portion 22a breaks.

[0010] exist Figure 1 , Figure 2A and Figure 2BIn the prior art shown, two mating portions 20 are disposed at two locations on the clamp holding member 18, and are separated from each other by 180 degrees along the circumferential direction of the clamp holding member 18 in the clamp advance / retreat channel 18a. The clamp holding member 18 and the two mating portions are integrally formed by injection molding of synthetic resin. The synthetic resin has suitable elasticity and high strength, and can be, for example, PEEK, PPA, PA, etc.

[0011] The connecting component 22 is formed by injection molding of a resin material. The resin material has high strength and may be, for example, PEEK, liquid crystal polymer, or nylon plastic. The breakable portion 22a includes a notch or slit. This notch or slit cuts into the radially inward side of the clamp holding component 18 from the outer peripheral surface of the connecting component 22, extending in a direction intersecting the extending direction of the clamp advance / retreat channel 18a. The elongated arms 12c are connected to each other at their proximal ends 12b, which engage with the aforementioned notch or slit.

[0012] The proximal end 22b of the connecting member 22 branches into two strands. Compared to the breakable portion 22a, the proximal end 22b is closer to the distal end 10a of the insert member 10. The two branched portions of the proximal end 22b are close to each other, with a longitudinally extending dividing line 22c in between. A connecting hole 22d is formed on the opposite surfaces of the two close branched portions, extending along the longitudinal centerline of the clamp advance / retreat channel 18a. The distal end of the operating line 16b protrudes longitudinally, and the protruding end of the protruding portion is a generally tapered engaging portion 16c. The engaging portion 16c is pressed into the connecting hole 22d, allowing relative rotation between the connecting member 22 and the operating line 16b.

[0013] A portion of the outer peripheral surface of the connecting member 22 is provided as a flat portion. In the inner peripheral surface of the clamp advance / retreat channel 18a, the portion corresponding to the aforementioned flat portion of the connecting member 22 is also provided as a flat portion. The flat portion of the inner peripheral surface of the clamp advance / retreat channel 18a extends within the range of movement of the flat portion of the connecting member 22 when the connecting member 22 moves within the clamp advance / retreat channel 18a. Therefore, as... Figure 2B As shown, the connecting component 22 will not rotate in the circumferential direction within the clamp advance / retreat channel 18a.

[0014] The movement path of the fractured part 22a in the clamp advance and retraction channel 18a is adjacent to the inner surface of one of the two fitting parts 20.

[0015] Below, refer to Figures 3A to 3D The process of ligating a target region of a target tissue in a body cavity of a living organism (e.g., a human body) using an existing clamp delivery device having the above-described structure is described.

[0016] First, the endoscope's insertion cannula is inserted into the body cavity, with the distal end of the cannula pointing towards the target area of ​​the target tissue. Then, with the distal end of the insertion member 10 facing forward (i.e., away from the operator), the insertion member 10 of the clamp delivery device is inserted into the endoscope's clamp channel or sheath. At this time, the clamp 12 is in the retracted state in the clamp advance / retreat channel 18a of the clamp holding member 18, and the clamp holding member 18 is in the retracted state at the distal end of the channel 10c of the insertion member 10.

[0017] After the distal end 10a of the insertion member 10 extends from the distal opening of the endoscope clamp channel, the external operating part 16a is pushed to push the clamp holding member 18 out of the distal portion of the channel 10c and push the clamp 12 out of the clamp in / out channel 18a. Figure 3A As shown, the proximal ends of the two engaging portions 20 of the clamp holding member 18 elastically expand (i.e., open) radially outward in the clamp holding member 18. The proximal ends of the engaging portions 20 abut against the periphery of the distal opening of the channel 10c, preventing the clamp holding member 18 from retracting into the channel 10c.

[0018] like Figure 3A As shown, as the connecting member 22 moves toward the distal end (in the direction indicated by arrow F), the distal end 12a of the clamp 12 opens radially outward. This positions the gap between the opened distal ends 12a within the target region DR of the target tissue. Then, the external operating part 16a is operated to move the connecting member 22 toward... Figure 3B Move in the direction indicated by the middle arrow R to close the distal end 12a of the clamp. As a result, during the process of pulling the arm 12c of the clamp 12 into the clamp advance / retreat channel 18a, the outer surface of the arm 12c slides into contact with the opening edge of the clamp advance / retreat channel 18a and is pressed radially inward, allowing the distal end 12a to clamp the target area DR of the target tissue, such as... Figure 3B As shown.

[0019] Further pulling the outer operating part 16a will generate pulling resistance in the target area DR, and the frictional resistance between the outer surface of the arm 12c and the opening edge of the clamp advance / retreat channel 18a will also increase. These forces further increase and are applied to the bottom of the fractured part 22a. When they exceed a specified value, they will cause the notch or slit of the fractured part 22a to widen, causing the distal end 22e of the connecting member 22 to separate from the bottom.

[0020] When clamp 12 is as Figure 3B When clamping the target area DR as shown, if the opening distance of the distal end 12a is large, before the arm 12c of the clamp 12 fully retracts into the clamp advance / retraction channel 18a, the deflection force BF on the bottom of the breakable part 22a will act on the distal end 22e of the connecting member 22, such as... Figure 3CAs shown. At this time, the distal end 22e faces the inner surface of one of the two mating portions 20. Therefore, the distal end 22e, which is subjected to the deflection force BF, pushes the inner surface of the corresponding mating portion 20 radially outward until the bottom of the fractured portion 22a breaks, as shown. Figure 3D As shown.

[0021] Due to the deflection force BF, the arm 12c of the clamp 12 will not be pulled further into the clamp advance / retreat channel 12a. As a result, the clamping force of the clamp 12 on the target area DR will be insufficient.

[0022] Apart from Figures 1 to 3D In addition to the existing clamping and conveying devices shown, Figures 4 to 6C Another existing clamping and conveying device is shown. The latter differs from the former in that the clamping unit 14 has a locking ring 32 and a helical spring 36.

[0023] like Figure 4 As shown, the locking ring portion 32 is located near the end of the clamp advance / retreat channel 18a, and is positioned closer to the end side than the fitting portion 20. The inner diameter of the locking ring portion 32 is smaller than the inner diameter of the clamp advance / retreat channel 18a.

[0024] like Figure 6B As shown, the locking ring portion 32 protrudes circumferentially from the inner circumferential surface of the near end of the clamp advance / retreat channel 18a. The inner surface 32a of the locking ring portion 32 is circular and coaxial with the clamp advance / retreat channel 18a.

[0025] The locking ring portion 32 can be made of a metallic material, such as stainless steel (SUS304), titanium alloy (Ti-6AL-4V), or cobalt-chromium alloy. Preferably, nitrogen-doped stainless steel is used to increase surface hardness.

[0026] Reference Figure 4 A helical spring 36 is disposed within the clamp's advance / retreat channel 18a. The last coil portion 36b of the helical spring 36 is located at the distal end of the helical spring 36. The inner diameter of the last coil portion 36b is smaller than the inner diameter of other parts of the helical spring 36.

[0027] like Figure 5 As shown, when the helical spring 36 is positioned within the clamp's advance / retreat channel 18a, the distal end of the helical spring 36 (i.e., the last coil 36b) is positioned on the protrusions 23 and 24 formed in the arm portion 12c. The proximal end 36a of the helical spring 36 is positioned on the distal side of the locking ring portion 32, as shown. Figure 6B As shown.

[0028] The protrusions 23 and 24 are connected to the last coil portion 36b of the coil spring 36. Alternatively, the coil spring 36 may omit the last coil portion 36b and instead use a separate component such as a washer.

[0029] exist Figure 4 , Figure 5 In the middle, the proximal end of the arm 12c is located on the distal side of the locking ring 32 in the clamp advance and retreat channel 18a. Figure 5 The locking parts 25 and 26 in the middle will not contact the locking ring part 32b, and the distal end 12a of the arm part 12c is separated from each other, so that the clamp 12 is in the open state.

[0030] Figure 6A and Figure 6B This indicates that the clamp 12 and the connecting component 22 have been pulled to the position where the fractured part is about to break. For example... Figure 6A , Figure 6B As shown, in order for the connecting member 22 to move forward and backward within the clamping channel 18a, the outer diameter of the connecting member 22 must be smaller than the inner diameter of the clamping channel 18a. In order for the connecting member 22 to pass through the locking ring portion 32, whose inner diameter is smaller than that of the fitting portion 20, the outer diameter of the connecting member 22 cannot be larger than the inner diameter of the locking ring portion 32. Therefore, as... Figure 6B As shown, there is a gap G1 between the outer diameter of the connecting member 22 and the inner diameter of the fitting portion 20. Due to the presence of the gap G1, relative displacement will occur between the clamp 12 and the connecting member 22. For example, when the clamp 12 and the connecting member 22 are pushed or pulled by the outer operating part, vibration occurs, and the relative displacement can cause the clamp 12 to separate from the connecting member 22, that is, the proximal end 12b of the arm portion 12c disengages from the notch or slit of the fractured portion 22a.

[0031] Furthermore, such as Figure 6C As shown, when the connecting member 22 is pulled by the outer operating part 16a through the locking ring part 32, a sufficiently large pulling force causes the locking parts 25 and 26 to pass over the locking ring part 32 proximally. Furthermore, by further pulling the connecting member 32, the pulling resistance generated by the target area DR of the target tissue and the resistance generated by the coil spring 36 increase. These further increased forces are applied to the bottom of the fractured part 22a, and when they exceed a predetermined value, they will cause the notch or slit of the fractured part 22a to widen, causing the distal end 22e of the connecting member 22 to separate from the bottom.

[0032] However, as Figure 6C As shown, a bending moment M about the bottom of the fractured portion 22a is applied to the distal end 22e of the connecting member 22, causing the distal end 22e to move radially, increasing the effective diameter of the connecting member 22. In this case, the gap G2 between the bottom of the fractured portion 22a and the load center originating from the proximal end 12b of the clamp 12 increases, causing the outer surface of the connecting member 22 to contact the inner surface of the fitting portion 20. The bending moment M hinders the longitudinal movement of the clamp 12 and the connecting member 22, thereby reducing the force available to break the fractured portion 22a.

[0033] Existing technical documents

[0034] Patent documents

[0035] Patent Document 1: Japanese Patent Publication JP2002191609A

[0036] Patent Document 2: Japanese Patent Publication JP2004121485A Summary of the Invention

[0037] The purpose of this invention is to provide an improved clamping and conveying device that can solve at least one of the aforementioned technical problems.

[0038] To achieve the above objectives, the clamp conveying device of the present invention includes: a clamp unit including a clamp and a tubular clamp holding member that houses at least a proximal end of the clamp; an operating line for operating the clamp; and a connecting member for connecting the clamp and the operating line. The clamp conveying device is characterized in that it includes a vibration suppression mechanism for suppressing vibration between the connecting member and the clamp.

[0039] According to one embodiment of the present invention, the arm of the clamp is integrally connected to the proximal end of the clamp, and the distal end of the connecting member forms a hook portion, which is connected to the proximal end of the clamp. The vibration suppression mechanism includes a fastening portion extending from the distal end of the connecting member and pressing at least a portion of the top surface of the clamp.

[0040] The fastening portion extends to both sides from the distal end of the connecting member and is symmetrical with respect to the longitudinal axis of the connecting member.

[0041] The connecting component includes multiple support surfaces that support the bottom surface of the proximal end of the clamp.

[0042] The near end of the clamp is formed with a clamp step portion, and the support surface is formed with a first step portion that matches the clamp step portion from the bottom side.

[0043] The fastening part has a second stepped part, which matches the clamp stepped part from the top surface side.

[0044] According to another embodiment of the invention, the arm of the clamp is integrally connected to the proximal end of the clamp, and the distal end of the connecting member forms a hook portion, which is connected to the proximal end of the clamp. The vibration suppression mechanism includes an extension extending from the distal end of the connecting member and a locking ring portion protruding from the inner circumferential surface of the clamp holding member.

[0045] The arm of the clamp includes a locking portion protruding from the arm, which is located on the proximal side compared to the extension when the hook engages the proximal end of the clamp.

[0046] When the locking portion passes the locking ring portion towards the proximal end, the locking ring portion is located on the proximal end side compared to the extension portion.

[0047] As the extension passes through the locking ring portion, the extension remains in contact with the inner circumferential surface of the locking ring portion.

[0048] The connecting component includes multiple support surfaces that support the bottom surface of the proximal end of the clamp.

[0049] The proximal end of the clamp is formed with a clamp step portion, and the support surface is formed with a third step portion that matches the clamp step portion from the bottom side.

[0050] According to another embodiment of the invention, the clamp has a first pin at its proximal end that rotatably connects two arms, and the distal end of the connecting member forms a hook that is connected to the first pin.

[0051] The hook portion forms a fastening portion with an opening size smaller than the outer diameter of the first pin.

[0052] The two arms have elongated slots, and the clamp has a second pin that is inserted through the elongated slots to connect the two arms and can slide along the elongated slots. The two ends of the second pin are fixed to the clamp holding component.

[0053] The connecting component includes a first connecting component whose distal end forms a first hook portion and a second connecting component whose distal end forms a second hook portion, wherein the first hook portion and the second hook portion are respectively connected to both ends of the first pin.

[0054] The vibration suppression mechanism includes a first hook and a second hook, which together encircle the entire circumference of the first pin when viewed from the axial direction of the first pin.

[0055] The opening directions of the first hook and the second hook are opposite.

[0056] The first hook and the second hook are C-shaped, and the longitudinal axes of the first connecting component and the second connecting component pass through the load center of the first hook and the second hook, respectively.

[0057] The first hook and the second hook abut against the two arms of the clamp located in the middle from both sides.

[0058] The clamp holding member or the insertion member located on the proximal side of the clamp holding member and through which the operation line is inserted has a radial constraint portion formed by a reduced inner diameter, the radial constraint portion constraining the radial displacement of the first connecting member and the second connecting member.

[0059] The first connecting component and the second connecting component remain in contact with the inner circumferential surface of the radial constraint portion.

[0060] The radial constraint portion is a deformable connector that connects the clamp holding component and the insertion component. The inner diameter of the radial constraint portion is larger than the outer diameter of the proximal end of the first connecting component and the proximal end of the second connecting component, and smaller than the outer diameter of the distal end of the first connecting component and the distal end of the second connecting component.

[0061] The clamp conveying device according to the present invention can suppress the vibration of the clamp when it moves within the first tube and prevent the clamp from detaching from the connecting member. Furthermore, it can suppress the deflection force and bending moment generated when the clamp moves within the first tube. Attached Figure Description

[0062] Figure 1 This is a perspective view of an existing clamping and conveying device.

[0063] Figure 2A yes Figure 1 Enlarged longitudinal section view of the clamp unit of the clamp conveying device shown.

[0064] Figure 2B From Figure 2A A cross-sectional view observed along the IIB-IIB direction.

[0065] Figures 3A to 3D It is represented according to the order of the ligation procedure. Figure 2A , Figure 2B The state diagram of the fixture unit is shown.

[0066] Figure 4 This is a cross-sectional view of another existing clamping and conveying device viewed from above.

[0067] Figure 5 yes Figure 4 The diagram shows a side cross-sectional view of an existing clamp conveying device, and an enlarged schematic view showing the connection between the clamp and the connecting component.

[0068] Figure 6A It is Figure 4 The diagram shows a perspective view of the clamping conveyor device when the clamp is pulled to the breakage position. Figure 6B It means Figure 4 A schematic diagram illustrating the disadvantages of the fixture conveying device shown. Figure 6C It means Figure 4 A schematic diagram illustrating another drawback of the clamp conveying device shown.

[0069] Figure 7A This is a perspective view of the connecting component according to the first embodiment of the present invention. Figure 7B This is a magnified schematic diagram of the structure near the fastening part.

[0070] Figures 8A to 8D These are diagrams showing the connection points of the clamp and connecting component, where the fastening part of the first embodiment of the present invention is located, viewed from different angles.

[0071] Figure 9A This is a perspective view of the connecting component according to the second embodiment of the present invention. Figure 9B This is a schematic enlarged view of the distal end of the connecting component.

[0072] Figures 10A to 10D This is a top longitudinal section view of the vicinity of the clamp unit when operating the clamp conveying device according to the second embodiment of the present invention.

[0073] Figure 11 yes Figure 10C The side cross-sectional view of the fixture unit in the shown state.

[0074] Figure 12 From Figure 11 A cross-sectional view taken from the BB direction.

[0075] Figure 13 This is a schematic diagram after the fractured part has successfully fractured.

[0076] Figure 14 This is a cross-sectional view near the clamping unit of the clamping conveying device according to the third embodiment of the present invention.

[0077] Figure 15 This is a schematic diagram of the clamp holding component according to the third embodiment of the present invention.

[0078] Figure 16 This is a side view of the connecting component according to the third embodiment of the present invention.

[0079] Figure 17 This is a schematic diagram illustrating the vibration suppression mechanism according to the third embodiment of the present invention. Detailed Implementation

[0080] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. The following embodiments are for illustrative purposes only and do not limit the scope of protection of the present invention.

[0081] In the following description, "distal side" is the direction away from the clamping operating member 16, and "proximal side" is the opposite direction of "distal side", that is, the direction toward the clamping operating member 16.

[0082] First Implementation Method

[0083] Figure 7A This is a perspective view schematically showing the connecting components of the clamp conveying device according to the first embodiment. Figure 7BIt is a schematic representation Figure 7A An enlarged view of the fastening mechanism of the connecting component shown. The difference between the clamp conveying device of this embodiment and the aforementioned prior art lies in the different way the clamp and the connecting component are joined; the rest of the structure can be the same as any of the aforementioned prior art.

[0084] In the clamp conveying device of this embodiment, the connection between the clamp 12 and the connecting member 42 is controlled and stabilized by a fastening mechanism to ensure smooth and stable operation of the clamp unit 14 along the longitudinal movement path of the clamp advance-retreat channel 18a. When the clamp 12 and the connecting member 42 advance and retreat in the clamp advance-retreat channel 18a, the fastening mechanism suppresses vibration and relative movement between the clamp 12 and the connecting member 42. Furthermore, the fastening mechanism minimizes the deflection force and / or bending moment generated during the operation of the clamp unit 14, resulting in the successful application of the breakage force required for operation to the breakable portion of the connecting member 42.

[0085] like Figure 7A As shown, in this embodiment, the connecting member 42 is disposed on the clamp holding member 18 and is movable along the extending direction of the clamp holding member 18. The connecting member 42 includes a proximal end portion 42b and a distal end portion 42e. The proximal end portion 42b is connected to the operating line 16b. The surface of the distal end portion 42e forms a hook, thereby hooking the proximal end portion 12b of the clamp 12 onto the connecting member 42 at the distal end portion 42e.

[0086] By operating the clamp operating member 16, the connecting member 42 moves longitudinally forward and backward together with the clamp 12 in the clamp advance-retreat channel 18a. The connecting member 42 includes a fractured portion 42a. When the clamp operating member 16 applies a tensile force greater than a predetermined value, the fractured portion 42a breaks. Compared to other parts of the connecting member 42 (especially the part near the proximal end 42b), the fractured portion 42a has a reduced cross-sectional area so that breakage occurs preferentially at that location.

[0087] The connecting component 42 is formed by injection molding of a high-strength resin material, such as PEEK, liquid crystal polymer, or nylon. The fractured portion 42a can be formed as a notch or slit. This notch or slit can be formed by cutting a portion of the circumferential surface of the connecting component 42 radially along the clamp holding component 18, extending in a direction intersecting the longitudinal direction (i.e., the extending direction) of the clamp advance / retreat channel 18a. Figure 8B As shown, in the notch or slit described above, the proximal end 12b of the arm portion 12c, which is connected to each other, is hooked at the distal end 42e of the connecting member 42 at the breakable portion 42a and thus connected.

[0088] like Figure 7BAs shown, the connecting component 42 also includes a plurality of support surfaces 44, 45, and 46. These support surfaces 44, 45, and 46 support the bottom surface 122b of the proximal end 12b of the clamp 12 (see reference). Figure 8D Support surfaces 44, 45, and 46 include Figure 8A The shape of the proximal end 12b of the stepped portion 12f shown is matched. The width of each support surface 44, 45, 46 is greater than or equal to the thickness T of the proximal end 12b (refer to...). Figure 8B Support surfaces 44 and 45 form a stepped portion 42f corresponding to the stepped portion 12f of the proximal end portion 12b. Support surface 46 is formed around the hook portion (i.e., the distal end portion 42e) at the bottom of the breakable portion 42a. The stepped portion 42f forms an angle α at the bottom of the distal end portion 42e. This angle α of the stepped portion 42f can take an appropriate value within the range of 90° to 180°. Angle α and angle θ (refer to...) Figure 8C The sum of the angles α and θ is less than or equal to 180°. In this embodiment, angle α and angle θ have the same value. That is, the step portion 42f of the support surface and the step portion 431 of the complementary fastening mechanism are parallel.

[0089] The proximal end 42b of the connecting member 42 can branch into two strands. The proximal end 42b is closer to the distal end 10a of the insert member 10 than the breakable portion 42a. The two branched portions 42b-1 and 42b-2 are close to each other, with a longitudinally extending dividing line 42c in between. A connecting hole 42d is formed on the adjacent, opposite surfaces of the branched portions, extending along the longitudinal centerline of the clamp advance / retreat channel 18a. The distal end of the operating line 16b protrudes longitudinally, and the protruding end of the protruding portion is a generally tapered engaging portion 16c. The engaging portion 16c is pressed into the connecting hole 42d located at the two branched portions, allowing relative rotation between the connecting member 42 and the operating line 16b.

[0090] A portion of the outer peripheral surface of the connecting member 42 is provided as a flat portion. In the inner peripheral surface of the clamp advance / retreat channel 18a, a portion corresponding to the aforementioned flat portion of the connecting member 42 is also provided as a flat portion. The flat portion of the inner peripheral surface of the clamp advance / retreat channel 18a extends within the range of movement of the flat portion of the connecting member 42 when the connecting member 42 moves within the clamp advance / retreat channel 18a.

[0091] The movement path of the clamp 12 and the connecting member 42 within the clamp holding member 18 is adjacent to the inner surface of the clamp holding member 18. That is, similar to... Figure 6BAs shown in the gap G1, there is a space between the outer surface of the connecting member 42 and the inner surface of the clamp holding member 18. When the clamp 12 and the connecting member 42b, which hooks onto the clamp 12 at its distal end 42e, move forward and backward in the clamp holding member 18 through the operation of the clamp operating member 16, vibration and corresponding relative movement occur between the clamp 12 and the connecting member 42. Furthermore, the deflection force BF caused by the vibration is applied radially outward to the bottom of the fractureable portion 42a. Due to this deflection force BF, the proximal end 12b of the clamp 12 easily disengages from the distal end 42e (i.e., the hook) of the connecting member 42. In addition, the deflection force BF hinders the longitudinal movement of the connecting member 42, reducing the tensile force required to successfully break the fractureable portion 42a.

[0092] Furthermore, when the clamp 12 and the connecting member 42 are pulled by the outer operating part 16a, a bending moment M about the bottom of the fractured part 42a is applied to the distal end 42e of the connecting member 42. This causes the distal end 42e to move radially outward toward the connecting member 42. In this case, the gap between the bottom of the fractured part 42a and the load center originating from the proximal end 12b of the clamp 12 (similar to...) Figure 6C The increased gap (G2) causes the outer surface of the connecting member 42 to contact the inner surface of the clamp advance / retreat channel 18a. The bending moment M hinders the longitudinal movement of the clamp 12 and the connecting member 42, thereby reducing the force that can successfully break the fractured part 42a.

[0093] In order to prevent the proximal end 12b of the clamp 12 from disengaging from the distal end 42e (i.e., the hook) of the connecting member 42, and in order to effectively control the deflection force BF and the bending moment M, the connecting mechanism 42 also includes a fastening mechanism.

[0094] like Figures 8A to 8D As illustrated, a fastening mechanism is formed on the connecting member 42. In this embodiment, the fastening mechanism includes a pair of fastening portions 43. The fastening portions 43 extend from both sides of the top surface 421e of the distal end 42e of the connecting member 42 in a direction perpendicular to the longitudinal direction of the clamp advance / retreat channel 18a (the direction of movement of the connecting member 42).

[0095] Each of the fastening portions 43 extends a predetermined distance. When a portion of the top surface 121b of the proximal end 12b of the clamp 12 is fastened by the fastening portion 43 during the assembly process, the fastening portion 43 can cover and press against at least a portion of the top surface 121b. In this embodiment, the predetermined distance that the fastening portion 43 extends is equal to the thickness T of the top surface (lateral) 122a of the proximal end 12b of the clamp 12 (refer to...). Figure 8B In other embodiments, the specified distance by which the fastening portion 43 extends is at least equal to the thickness T of the top surface (lateral direction), and preferably greater than the thickness T of the top surface (lateral direction).

[0096] like Figure 8B As shown, in this embodiment, a pair of engaging portions 43 are formed symmetrically with respect to the axis C1 (longitudinal axis) of the connecting member 42 (or the clamp advance / retreat channel 18a). The shape of the pair of engaging portions 43 forms a pair of wings extending from the top surface 421e. The wingspan of the pair of wings at least covers and presses against a portion of the top surface (lateral) 121b of the proximal end 12b of the clamp 12, preferably pressing against the entire thickness T.

[0097] like Figure 8C As shown in the side view, the engaging portion 43 includes a stepped portion 431. The stepped portion 431 of the engaging portion 43 matches the stepped portion 12f of the proximal end 12b of the clamp 12, thereby enabling the clamp 12 and the connecting member 42 to engage. The stepped portion 421 can form an angle θ, such as... Figure 8C As shown. The angle of the step portion 421 can be any suitable value, preferably 0° to 90°.

[0098] Figure 8D It is taken from Figure 8C Cross-sectional view of line AA. (See diagram below.) Figure 8D As shown, in the region where the engaging portion 43 contacts the proximal end portion 12b of the clamp 12, the engaging portion 43 overlaps with the entire top surface 121b. The stepped portion 431 may include a protrusion that fits into the recess formed in the proximal end portion 12b of the clamp 12, thereby engaging the clamp 12 and the connecting member 42.

[0099] The fastening part 43 of the present invention is not limited to the wing-shaped structure described above. The present invention can employ any structure capable of reliably hooking the clamp 12 onto the connecting member 42.

[0100] Furthermore, the fastening mechanism may further include any additional fastening portion. For example, the additional fastening portion extends longitudinally from the top surface along the connecting member 42, such that the additional fastening portion can at least partially cover the connection portion of the connecting proximal end 12b, thereby further enhancing the hooking stability of the clamp 12 and the connecting member 42.

[0101] The fastening part can be integrally formed with the connecting part 42 by molding.

[0102] The fastening part can be a permanent fastening method or a multiple fastening method (reusable multiple times). In this embodiment, the fastening part is a permanent fastening method, that is, it is a disposable component used in the clamping unit and cannot be disassembled.

[0103] As described above, the connection between the clamp 12 and the connecting member 42 is regulated and stabilized by the fastening mechanism, and the deflection force BF and bending moment M can be effectively controlled. This prevents the proximal end 12b of the clamp 12 from detaching from the distal end 42e of the connecting member 42, enhances the stability of the hook, and strengthens the tensile force that successfully breaks the fractured portion 22a.

[0104] Second Implementation Method

[0105] Figure 9A This is a perspective view schematically showing the connecting components of the clamp conveying device according to the second embodiment. Figure 9B yes Figure 9A The diagram shows an enlarged view of the connecting components. The difference between the clamp conveying device of the second embodiment and the first embodiment lies in the clamp unit and the connecting components.

[0106] The clamp conveying device of the second embodiment includes an extended connecting member 52. The extended connecting member 52 is disposed within the clamp holding member 18 and is movable along the extending direction of the clamp holding member 18. The connecting member 52 includes a proximal end portion 52b and a distal end portion 52e. The proximal end portion 52b is connected to the operating line 16b. The surface of the distal end portion 52e forms a hook, thereby hooking the proximal end portion 12b of the clamp 12 onto the connecting member 52.

[0107] By operating the clamp operating member 16, the connecting member 52 moves forward and backward together with the clamp 12 in the clamp advance-retreat channel 18a along the aforementioned extending direction. The connecting member 52 includes a fractured portion 52a. When the clamp operating member 16 applies a tensile force greater than a predetermined value, the fractured portion 52a breaks. Compared to other parts of the connecting member 52 (especially the part near the proximal end 42b), the fractured portion 42a has a reduced cross-sectional area so that breakage occurs preferentially at that location.

[0108] The connecting member 52 is formed by injection molding of a high-strength resin material, such as PEEK, liquid crystal polymer, or nylon. The fractured portion 52a can be formed as a notch or slit. This notch or slit can be formed by cutting a portion of the circumferential surface of the connecting member 42 radially along the clamp holding member 18, extending in a direction intersecting the extending direction of the clamp advance / retreat channel 18a. In the notch or slit, the proximal ends 12b of the arms 12c, which are connected to each other, are hooked and connected by the distal ends 52e of the connecting member 52.

[0109] like Figure 9B As shown, the connecting component 52 also includes support surfaces 54 and 55. These support surfaces 54 and 55 support the bottom surface (lateral) 122b of the proximal end 12b of the clamp 12 (see reference). Figure 8D The shapes of the support surfaces 54 and 55 match the proximal end 12b of the clamp 12. The width of the support surfaces 54 and 55 is greater than or equal to the thickness T of the proximal end 12b (see reference). Figure 8BSupport surfaces 54 and 55 form a stepped portion 52f corresponding to the stepped portion of the proximal end portion 12b. Support surface 54 is formed inclined toward the bottom surface of the distal end portion 52e of the connecting member 52. Support surface 55 is formed around the hook portion (i.e., the distal end portion 52e) at the bottom of the breakable portion 52a. The angle of the stepped portion 42f in the aforementioned embodiment also applies to the stepped portion 52f.

[0110] The proximal end 52b of the connecting member 52 can branch into two strands. Compared to the breakable portion 52a, the proximal end 52b is closer to the distal end 10a of the insert member 10. The two branched portions 52b-1 and 52b-2 are close to each other, with a longitudinally extending dividing line 52c in between. A connecting hole 52d is formed on the adjacent opposing surfaces of the aforementioned branched portions, extending along the longitudinal centerline of the clamp advance / retreat channel 18a. The distal end of the operating line 16b protrudes longitudinally, and the protruding end of the protruding portion is a generally tapered engaging portion 16c. The engaging portion 16c is pressed into the connecting hole 52d located at the two branched portions, allowing relative rotation of the connection between the connecting member 52 and the operating line 16b.

[0111] A portion of the outer peripheral surface of the connecting member 52 is provided as a flat portion. In the inner peripheral surface of the clamp advance / retreat channel 18a, a portion corresponding to the aforementioned flat portion of the connecting member 52 is also provided as a flat portion. The flat portion of the inner peripheral surface of the clamp advance / retreat channel 18a extends within the range of motion of the flat portion of the connecting member 52 when the connecting member 52 moves within the clamp advance / retreat channel 18a.

[0112] The movement path of the clamp 12 and the connecting member 52 within the clamp holding member 18 is adjacent to the inner surface of the clamp holding member 18. That is, similar to... Figure 6B As shown in the gap G1, there is a space between the outer surface of the connecting member 52 and the inner surface of the clamp holding member 18. When the clamp 12 and the connecting member 52b, which hooks onto the clamp 12 at its distal end 52e, move forward and backward in the clamp holding member 18 through the operation of the clamp operating member 16, vibration and corresponding relative movement occur between the clamp 12 and the connecting member 52. Furthermore, a deflection force BF is applied radially outward to the bottom of the fractureable portion 52a. Due to this deflection force BF, the proximal end 12b of the clamp 12 easily disengages from the distal end 52e (i.e., the hook) of the connecting member 52. In addition, the deflection force BF hinders the longitudinal movement of the connecting member 52, reducing the tensile force required to successfully break the fractureable portion 52a.

[0113] Furthermore, when the clamp 12 and the connecting member 52 are pulled by the external operating part 16a, a bending moment M about the bottom of the fractured portion 52a is applied to the distal end 52e of the connecting member 52. This causes the distal end 52e to move radially outward toward the connecting member 52. In this case, the gap between the bottom of the fractured portion 52a and the load center originating from the proximal end 12b of the clamp 12 (similar to...) Figure 6C The increased gap (G2) causes the outer surface of the connecting member 52 to contact the inner surface of the clamp advance / retreat channel 18a. The bending moment M hinders the longitudinal movement of the clamp 12 and the connecting member 52, thereby reducing the force that can successfully break the fractured part 42a.

[0114] To prevent the proximal end 12b of the clamp 12 from disengaging from the distal end 52e (i.e., the hook) of the connecting member 52, and to effectively control the deflection force BF and bending moment M, such as Figure 9B As shown, the connecting member 52 further includes an extension 521e. The extension 521e extends from the main body portion 520e of the distal end portion 52e. That is, the distal end portion 52e of this embodiment includes the main body portion 520e and the extension 521e. Figure 9B In the middle, the main body 520e and the extension 521e are divided by dotted lines.

[0115] The extension 521e has a height H that is approximately the same as that of the main body 520e. As described below (see reference) Figure 12 The height H of the extension 521e is slightly smaller than the inner diameter D of the locking ring 32. When the extension 521e passes through the locking ring 32, the extension 521e contacts the inner circumferential surface of the locking ring 32. This prevents the connecting member 52 and the clamp 12 hooked on the connecting member 52 from moving in a direction different from the longitudinal direction of the clamp advance / retreat channel 18a.

[0116] Figures 10A to 10D It has Figures 9A-9B The longitudinal cross-sectional view of the extended connecting component shown is presented in the order of operation.

[0117] Figure 10A The arm 12c of the clamp 12 opens radially beyond the clamp access channel 18a. The connecting member 52 is located within the clamp access channel 18a, and its distal end 52e has an extension 521e. The distal end 52e has a tapered shape and, in a top view, gradually narrows longitudinally toward the distal end of the clamp access channel 18a.

[0118] exist Figure 10AIn the locked state, the extension 521e is located on the distal side compared to the locking parts 25 and 26. The extension 521e is also located on the distal side compared to the locking ring part 32. In other words, the locking parts 25 and 26 and the locking ring part 32 are located closer to the end side than the extension 521e. Alternatively, it can be said that the locking parts 25 and 26 are closer to the locking ring part 32 than the extension 521e.

[0119] Figure 10B This indicates that the insertion member 10 moves longitudinally under the operation of the outer operating part 16a. As a result, when the arm 12c of the clamp 12 is pulled into the clamp advance / retreat channel 18a of the clamp holding member 18, the outer surface of the arm 12c slides into contact with the opening edge of the distal end of the clamp advance / retreat channel 18a and is pressed radially inward, so that the distal end 12a of the clamp 12 can clamp the target area DR (not shown) of the target tissue. The extension 521e of the distal end 52e is pulled to a position close to the locking ring 32 within the clamp advance / retreat channel 18a. Figure 10B In this state, the distal end 52e, including the extension 521e, contacts the inner circumferential surface of the locking ring 32 during the operation of pulling the clamp 12. This enhances the stability of the clamp movement and overcomes the deflection force BF and bending moment M required to reduce the tensile force required to break the fracture portion 52a.

[0120] Figure 10C As the connecting member 52 is further pulled by the outer operating part 16a, the pulling resistance generated in the target area DR of the target tissue increases, and the friction between the outer surface of the arm 12c and the opening edge of the clamp advance / retreat channel 18a also increases. In the contact area where the proximal end 12b of the clamp 12 and the distal end 52e of the connecting member 52 hook, these increased resistances and the pulling force applied to the bottom of the fractured part 52a will cause vibration and corresponding relative movement between the clamp 12 and the connecting member 52. However, such vibration and corresponding relative movement can be effectively suppressed by the extension 521e because even when the connecting member 52 and the clamp 12 are pulled by the clamp operating part 16 to a position where the pulling force reaches a predetermined value that causes the fractured part to break, the extension 521e remains in contact with the inner circumferential surface 32a of the locking ring 32. In this state, the extension 521e is still located distally to the locking ring 32.

[0121] Figure 11 It is a schematic representation Figure 10CThe enlarged cross-sectional view shows the state of the extended connecting component. The extension 521e of the distal end 52e has a tapered shape, so that the movement of the locking parts (protrusions) 25 and 26 is not restricted when the locking parts 25 and 26 pass through the locking ring part 32. The tapered extension 521e extends longitudinally in the clamp advance / retreat channel 18a. The extension 521e has a height H slightly smaller than the inner diameter D of the locking ring part 32, so that the extension 521e can contact the inner circumferential surface 32a of the locking ring part 32. Figure 12 As shown, the contact between the extension 521e and the inner circumferential surface 32a of the locking ring portion 32 prevents the connecting member 52 from moving in a direction different from the longitudinal direction of the clamp advance / retreat channel 18a. This effectively suppresses vibration and corresponding relative displacement between the clamp 12 and the holding member 52. Furthermore, the contact between the extension 521e and the inner circumferential surface 32a of the locking ring portion 32 effectively overcomes the deflection force BF and bending moment M required to reduce the tensile force necessary for successful fracture of the fracture portion 52a.

[0122] Figure 10D This indicates that the fractured portion 52a of the connecting member 52 has broken. When the connecting member 52 is further pulled within the clamp advance / retreat channel 18a of the clamp holding member 18, the tension applied to the fractured portion 52a of the connecting member 52 by the clamp operating member 16 reaches a predetermined value that causes the fractured portion 52a to break, and the fractured portion 52a breaks.

[0123] like Figure 13 As shown, after the fractured portion 52a is successfully fractured, the distal end 52e of the connecting member 52 is separated from the connecting member 52 and left in the cavity of the organism together with the clamp 12.

[0124] Third Implementation Method

[0125] Figure 14 This is a schematic partial cross-sectional view of the clamp conveying device according to the third embodiment. The main difference between the clamp conveying device of the third embodiment and the first embodiment lies in the clamp unit and the connecting parts.

[0126] exist Figure 14 In this fixture unit, the fixture unit includes a fixture 12S and a fixture holding member 18S. The fixture holding member 18S receives at least the proximal end of the fixture 12S. The proximal end of the fixture holding member 18S is connected to the distal end 10a of the insertion member 10. The operating line 16b of the fixture operating member 16 is inserted into the channel 10c passing through the insertion member 10. The connecting member 62 connects the distal end of the operating line 16b of the fixture operating member 16 to the proximal end of the fixture 12S.

[0127] [Clamp]

[0128] like Figure 14As shown, the clamp 12S of the clamp conveying device in the third embodiment includes two arms 12Sc, 12Sc. Each arm 12Sc of the clamp 12S includes a first pin 12Sd at its proximal end 12Sb, which rotatably connects the two arms 12Sc, 12Sc. The two arms 12Sc, 12Sc also have elongated grooves 12Se, 12Se, respectively, through which a second pin 12Sf of the clamp 12S is inserted. The second pin 12Sf, inserted into the elongated grooves 12Se, 12Se, can slide along the elongated grooves 12Se, 12Se. Both ends of the second pin 12Sf are fixed to the clamp holding member 18S. By moving the first pin 12Sd back and forth in the clamp advance / retreat channel 18Sa of the clamp holding member 18S, the second pin 12Sf slides along the elongated grooves 12Se, 12Se, causing the two arms 12Sc, 12Sc to open and close, and the distal end 12Sa of the clamp 12S clamps or releases the target area of ​​the target tissue.

[0129] [Clamp holding components]

[0130] like Figure 14 , Figure 15 As shown, the clamp holding member 18S is a hollow cylindrical shape with a distal opening 18Sb and a proximal opening 18Sc. The clamp holding member 18S has two opposing grooves 18Sd in the tube wall for the two arms 12Sc, 12Sc to pass through when opened. Furthermore, the clamp holding member 18S has a pair of pin holes 18Se in the tube wall for the two ends of the second pin 12Sf to be fixed to the clamp holding member 18S.

[0131] [Connecting Components]

[0132] like Figure 14 , Figure 16 , Figure 17 As shown, the connecting component 62 in this embodiment includes a first connecting component 621 and a second connecting component 622.

[0133] The first connecting member 621 and the second connecting member 622 can be made of a long strip of metal sheet. The distal end 621a of the first connecting member 621 forms a first hook. The distal end 622a of the second connecting member 622 forms a second hook. The first hook 621a and the second hook 622a respectively hook onto both ends of the first pin 12Sd. The first hook 621a and the second hook 622a respectively form a fastening portion with an opening size smaller than the outer diameter of the first pin 12Sd, such as... Figure 16 As shown. Therefore, with just a little force, it can be connected to both ends of the first pin 12Sd.

[0134] The two arms 12Sc, 12Sc of the clamp 12S are located between the first hook 621a and the second hook 622a. Preferably, the first hook 621a and the second hook 622a can abut against the two arms 12Sc, 12Sc of the clamp 12S from both sides, which can prevent the two arms 12Sc, 12Sc from moving arbitrarily in the abutment direction.

[0135] Figure 16 This is a side view of the first connecting component 621. Figure 16 As shown, starting from the distal end, the first connecting member 621 includes a distal end (i.e., a first hook portion) 621a, a main body portion 621c, and a proximal end portion 621b. The distal end portion 621a, the main body portion 621c, and the proximal end portion 621b can be integrally formed from a long strip of metal sheet. The distal end portion (first hook portion) 621a is C-shaped. The longitudinal axis L of the first connecting member 621 passes through the load center O of the first hook portion 621a. The load center O is... Figure 16 The farthest position of the receiving space of the first hook portion 621a in the C-shape. The width of the distal end portion 621a and the main body portion 621c is approximately the same, and the width of the proximal end portion 621b is smaller than the width of the distal end portion 621a and the main body portion 621c.

[0136] The size and shape of the second connecting part 622 can be the same as those of the first connecting part 621, and will not be described again.

[0137] The proximal end 621b of the first connecting member 621 and the proximal end of the second connecting member 622 are connected to the distal end of the operating line 16b.

[0138] [Frequency Suppression Mechanism]

[0139] The vibration suppression mechanism of the third embodiment includes a first hook portion 621a and a second hook portion 622a. When the connecting member 62 is connected to the clamp 12S (i.e., the first hook portion 621a and the second hook portion 622a hook the first pin 12Sd), as... Figure 17 As shown, viewed axially from the first pin, the first hook portion 621a and the second hook portion 622a together encircle the entire circumference of the first pin. Preferably, the opening directions of the first hook portion 621a and the second hook portion 622a are opposite. For example, in Figure 14 and Figure 17 In the middle, the opening directions of the first hook 621a and the second hook 622a are upward and downward, respectively.

[0140] Therefore, when the clamp 12S and the connecting member 62 that hooks the clamp 12S move forward and backward in the clamp holding member 18S through the operation of the clamp operating member 16, even if vibration and corresponding relative movement occur between the clamp 12 and the connecting member 62, they will be suppressed within the range jointly enclosed by the first hook 621a and the second hook 622a, and the first pin 12Sd will not detach from the first hook 621a and the second hook 622a.

[0141] Furthermore, the first hook portion 621a and the second hook portion 622a are C-shaped, and the longitudinal axes L of the first connecting member 621 and the second connecting member 622 respectively pass through the load center O of the first hook portion 621a and the second hook portion 622a (refer to...). Figure 16 When the clamp 12S and the connecting member 62 are subjected to the operating force of the clamp operating member 16, the first hook 621a and the second hook 622a are subjected to a load originating from the first pin 12Sd, with the load center at O. Since the longitudinal axes L of the first connecting member 621 and the second connecting member 622 pass through the load center O of the first hook 621a and the second hook 622a respectively, the generation of deflection force BF and bending moment M can be suppressed.

[0142] Furthermore, the first hook portion 621a and the second hook portion 622a abut against the two arms 12Sc, 12Sc of the clamp 12S located in the middle from both sides, which can prevent the two arms 12Sc, 12Sc from moving arbitrarily in the abutment direction. Therefore, it is also possible to suppress vibration and corresponding relative movement between the clamp 12 and the connecting member 62.

[0143] In addition, such as Figure 14 As shown, a radial constraint portion 56, formed by a decrease in inner diameter, is formed along the movement path of the connecting member 62, constraining the radial displacement of the connecting member 62 (i.e., the first connecting member 621 and the second connecting member 622). The radial constraint portion 56 can be formed on the clamp holding member 18S or the insertion member 10. In this embodiment, the radial constraint portion 56 is formed at the connection between the clamp holding member 18S and the insertion member 10. Therefore, it can be considered to be formed on either the clamp holding member 18S or the insertion member 10. The inner diameter of the clamp advance / retreat channel 18a decreases at the radial constraint portion 56, and when the first connecting member 621 and the second connecting member 622 pass through the radial constraint portion 56, they can maintain contact with the inner circumferential surface of the radial constraint portion 56. As a result, the vibration generated when the connecting member 62 moves can be suppressed, thereby suppressing the vibration and corresponding relative movement between the clamp 12 and the connecting member 62.

[0144] Furthermore, in this embodiment, the radial constraint portion 56 is a deformable connector that connects the clamp holding portion 18S and the insertion member 10, and is made of, for example, a metal sheet. The radial constraint portion 56 connects the clamp holding portion 18S and the insertion member 10, for example, by inserting a pin hole formed in the tube wall of the clamp holding portion 18S and the insertion member 10. The radial constraint portion 56 has a central opening. The inner diameter of the radial constraint portion 56 is larger than the outer diameter of the proximal end portion 621b of the first connecting member 621 and the proximal end portion of the second connecting member 622, and smaller than the outer diameter of the distal end portion 621a of the first connecting member 621 and the distal end portion of the second connecting member 622. Therefore, the proximal end portion of the connecting member 62 can pass through the radial constraint portion 56, but the distal end portion and the main body portion of the connecting member 62 cannot pass through the radial constraint portion 56.

[0145] When the connecting member 62 is pulled a predetermined distance towards the proximal end, the hook portion of the connecting member 62 will deform or break first, and the connection between the connecting member 62 and the clamp 12S will be released. Further pulling of the connecting member 62 causes the distal end and main body of the connecting member 62 to exert force on the radial constraint portion 56 of the deformable connector. The radial constraint portion 56 deforms under force and is pulled out from the pin hole on the tube wall of the clamp holding portion 18S and the insertion member 10, thus releasing the connection between the clamp holding portion 18S and the insertion member 10. That is, in this embodiment, the radial constraint portion 56 serves both to suppress vibration and to connect the clamp holding portion 18S and the insertion member 10, thus simplifying the structure of the clamp holding device.

[0146] The foregoing has described various embodiments of the present invention. However, these embodiments are merely illustrative and not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A gripper conveying device, characterized in that, The clip conveying device includes: a clip unit including a clip and a tubular clip holding member that houses at least a proximal end portion of the clip; an operation wire that operates the clip; a connecting member that connects the clip and the operation wire, the clip conveying device is characterized in that the clip has a first pin that rotatably connects two arm portions at a proximal end portion, the connecting member includes a first connecting member whose distal end portion constitutes a first hook portion and a second connecting member whose distal end portion constitutes a second hook portion, the first hook portion and the second hook portion being connected to the first pin, respectively, the connecting member is made of a long metal plate material, a proximal end portion of the connecting member being connected to a distal end of the operation wire, from an axial direction of the first pin, the first hook portion and the second hook portion collectively enclose an entire circumference of the first pin, an insertion member, which is provided on a proximal side of the clip holding member and through which the operation wire is inserted, is provided with a radial restriction portion that is formed by a reduction in an inner diameter, the radial restriction portion restricting displacement of the first connecting member and the second connecting member in a radial direction.

2. The clip conveying device according to claim 1, characterized in that the first hook portion and the second hook portion form a fastening portion whose opening size is smaller than an outer diameter of the first pin.

3. The clip conveying device according to claim 1, characterized in that the two arm portions have a long slot, the clip has a second pin that connects the two arm portions by being inserted through the long slot and is slidable along the long slot, both ends of the second pin are fixed to the clip holding member.

4. The clip conveying device according to any one of claims 1 to 3, characterized in that the first hook portion and the second hook portion are connected to both ends of the first pin, respectively.

5. The clip conveying device according to claim 1, characterized in that opening directions of the first hook portion and the second hook portion are opposite to each other.

6. The clip conveying device according to claim 1, characterized in that the first hook portion and the second hook portion are C-shaped, longitudinal axes of the first connecting member and the second connecting member pass through load centers of the first hook portion and the second hook portion, respectively.

7. The clip conveying device according to claim 1, characterized in that the first hook portion and the second hook portion abut both of the arm portions of the clip that are positioned in the middle from both sides.

8. The clip conveying device according to claim 1, characterized in that the first connecting member and the second connecting member are in contact with an inner peripheral surface of the radial restriction portion.

9. The clip conveying device according to claim 1, characterized in that the radial restriction portion is a deformable connecting member that connects the clip holding member and the insertion member, an inner diameter of the radial restriction portion is larger than an outer diameter of proximal end portions of the first connecting member and the second connecting member and is smaller than outer diameters of distal end portions of the first connecting member and the second connecting member.

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