JP2002017734A - Method of manufacturing endoscope treating instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing an endoscope treating instrument, improving workability while reducing work man-hours for work of locking a wire for transmitting opening/closing power, to forceps in a process of manufacturing the forceps. SOLUTION: This method of manufacturing the endoscope treating instrument, constituting a link mechanism of a pair of forceps cups 1 openable/closable at the tip by locking a wire 4 for transmitting power for opening/closing operation, to the cups 1, comprises process of deforming the end shape of the wire 4 on the cut side simultaneously with cutting the wire 4 using wire machining tools 5a, 5b when locking the wire 4 into a wire locking hole 3 of each forceps cup 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an endoscope treatment instrument such as forceps.

[0002]

2. Description of the Related Art Conventionally, when a power transmission wire is locked to a forceps, the wire is passed through a wire locking hole of the forceps and then bent at two or more locations so as to be folded back so that the wire is hooked on the forceps. There is known a method of locking, or a method of locking like a stopper by welding or the like to the tip of a wire passed through a wire locking hole.

A treatment tool for an endoscope manufactured by a conventional manufacturing method is disclosed in Japanese Patent Application Laid-Open No. 10-118089.

[0004] This conventional endoscope treatment tool 101 is shown in FIG.
This will be described with reference to FIGS. As shown in FIG.
The operating mechanism 102 of the endoscope treatment tool 101 includes a front handle 103 and a rear handle 10 that are disposed to face each other in the front-rear direction.
The base ends of the front handle 103 and the rear handle 104 are connected to each other by a support shaft 105 so as to be openable and closable.

A long pipe 106 (insertion member) extending in the front-rear direction is provided at an upper end of the front handle 103, and a rod (interlocking member) 107 extending in the axial direction is accommodated in the long pipe 106. Have been.

The front ends of the long pipe 106 and the rod 107 can be inserted into the body through an endoscope (not shown). The rear end of the rod 107 is the rear handle 1
The front handle 103 and the rear handle 104 reciprocate in the front-rear direction as the front handle 103 and the rear handle 104 open and close.

As shown in FIGS. 11 to 13, a forceps 108 is provided at the tip of the long pipe 106 at a predetermined distance from the front end of the rod 107.
Protrudes forward from the distal end opening 106a of the long pipe 106.

The forceps 108 is composed of a pair of blades (opening / closing members) 109 and 110 which are superimposed on each other. The two blades 109 and 110 are rotated by a fixed central shaft 111 fixed to the end of a long pipe 106. It is movably supported.

The two blades 109 and 110 are bent inward from the rear end to the vicinity of the fixed central axis 111 so as to be on the same horizontal plane.

At the rear ends of the two blades 109, 110, locking holes (locking portions) 112, 1 each having a circular shape in the vertical direction are provided.
13 are formed.

The front end of the rod 107 has an insertion hole 10
7a are formed along the horizontal direction. This insertion hole 1
07a, a single (single) wire (linear member) 114 made of metal is inserted.
07a, a pair of bent portions 116 and 117 bent forward at substantially right angles from both ends of the base portion 115, and hooks at the tips of both bent portions 116 and 117. It is constituted by retaining stoppers 118 and 119 to be formed.

The stoppers 11 at both ends of the wire 114
8 and 119 are bent so as to be inverted to the base end sides of both bent portions 116 and 117, and the two blade bodies 109 and 1
It is locked through ten locking holes 112 and 113, respectively.

When the retaining portions 118 and 119 interfere with the rear ends of the blades 109 and 110, the bent portions 116 and 117 are prevented from falling out of the locking holes 112 and 113.

Thus, the two blades 10 of the forceps 108
9, 110 and the rod 107 are drivingly connected by a wire 114.

The bent portions 116, 1
Reference numerals 17 cross each other so as to form an X shape, and have a predetermined elastic force in a direction in which the two blades 109 and 110 open. That is, the bent portions 116 and 117 of the wire 114 urge the two blades 109 and 110 to rotate in the opening direction.

Next, the operation of the endoscope treatment instrument 101 configured as described above will be described. When the operating mechanism 102 is remotely operated and the rod 107 is pulled backward, the front end of the rod 107 is separated from the fixed central shaft 111 and the wire 11
4 is displaced rearward, and the two blades 109 and 110 close each other against the elastic force of the bent portions 116 and 117.

When the operating mechanism 102 is remotely operated to push the rod 107 forward, the wire 114 is displaced forward, and the elastic force of the two bent portions 116 and 117 is also applied. Approaches, and the two blades 109 and 110 open from each other.

During the opening / closing operation of the blades 109, 110, even if the retaining members 112, 119 try to come out of the bent portions 116, 117 from the locking holes 112, 113, the retaining preventing portions 118, 119 are formed by the bases of the two bent portions 116, 117. Since the wire 114 is bent to the end side, the bent portions 116 and 117 of the wire 114 are
There is no escape from 2,113.

Further, during the opening and closing operation of the two blades 109 and 110, a compressive force acts on the both bent portions 116 and 117 of the wire 114 from both ends thereof in opposite directions. It does not break because of its rigidity.

[0020]

In the above-mentioned conventional method for manufacturing a treatment tool for an endoscope, operations such as bending and welding are performed after a wire is passed through a wire locking hole of a forceps. Alternatively, an operation of passing a wire subjected to a locking process such as bending or welding through a locking hole of the forceps occurs. In both cases, an increase in the number of work steps in the manufacturing process and a decrease in workability are considered.

Accordingly, the present invention provides a forceps by locking a wire in a wire locking hole of the forceps by cutting the wire and simultaneously changing the cross-sectional shape of the wire. In the manufacturing process of (1), there is provided a method for manufacturing a treatment tool for an endoscope which can reduce the number of operation steps and improve the workability of an operation of locking a wire for opening and closing power transmission to forceps.

[0022]

According to the first aspect of the present invention,
In a method for manufacturing a treatment tool for an endoscope in which a wire for transmitting power for opening and closing operations is locked to a pair of forceps whose ends can be opened and closed, a wire mechanism of the forceps is used. The method includes a step of using one tool to deform the end of the wire to be cut at the same time as cutting the wire by using a single tool when locking the hole.

According to the present invention, in the step of locking the wire in the wire locking hole of the forceps, the cutting tool portion for cutting and the wire are pressed by one tool, that is, a tool for processing the wire. By providing the crushing portion, it is possible to perform a process of deforming the wire shape at the same time as cutting the wire, and it is possible to lock the forceps and the wire in a single step so as to prevent or prevent the wire from coming off. It is possible to provide a method of manufacturing a treatment tool for an endoscope capable of reducing the number of man-hours for stopping work and improving workability.

According to a second aspect of the present invention, there is provided a treatment tool for an endoscope in which a pair of forceps having openable and closable ends is inserted and locked with a wire for transmitting power for opening and closing operations, thereby forming a link mechanism of the forceps. In the method of manufacturing, when locking the wire in the wire locking hole of the forceps, using a single tool to deform the end portion of the wire that is cut at the same time as the wire is cut, And a step of bending the vicinity of the insertion portion of the wire into the forceps with a bending tool in conjunction with the cutting step and the step of deforming the end shape.

According to the present invention, the same effect as that of the first aspect of the present invention is exhibited, and at the same time, bending near the wire insertion portion can be performed at the same time, and the forceps can be used even when an unprocessed wire is used. Thus, it is possible to provide a method of manufacturing a treatment tool for an endoscope, which can further reduce the number of work steps and improve workability of a work of locking a wire.

According to a third aspect of the present invention, in the method for manufacturing a treatment tool for an endoscope according to the first or second aspect, the deformation of the wire is performed by pressing the wire end simultaneously with cutting the wire. It is performed by forming a part.

According to the present invention, it is possible to provide a method of manufacturing a treatment tool for an endoscope which can reliably prevent the wire from coming off from the forceps by pressing the wire end to form the crushed portion.

[0028]

Embodiments of the present invention will be described below in detail.

(Embodiment 1) (Configuration) FIGS. 1 to 3 show a process of locking a forceps cup 1 and a wire 4 constituting a forceps in a treatment tool for an endoscope according to Embodiment 1 of the present invention. It is shown. FIG. 4 is a partial cross-sectional view showing the crushing portion 4b of the wire 4 locked on the forceps cup 1, and FIG. 5 is a plan view and a partial cross-sectional view of the forceps cup 1.

1 to 3 and 5, a pair of forceps cups 1 has a rotation center hole 2 at a position corresponding to the center of opening and closing the forceps, and a wire connection at a side opposite to the cup-shaped portion. A blind hole 3 is provided.

The final shape after the production of the forceps is such that two forceps cups 1 are symmetrically opposed to each other, and a pin or the like is incorporated in each rotation center hole 2 and disposed at the end of the endoscope sheath or the like. .

The power transmission wire 4 is locked in the wire locking hole 3 of the pair of forceps cups 1, and the other end is opened and closed by remote control such as pushing and pulling with the endoscope operating section. Become forceps.

The wire 4 is supplied to the wire locking step in a state of being formed into a predetermined shape, and the wire 4 is inserted into the wire locking hole 3 to a predetermined position.

In the first embodiment, for example, the wire 4 is supplied to the process with the bent portion 4 a bent at a right angle, and the bent portion 4 a contacts the end face of the forceps cup 1 on the wire locking hole 3. Function is also performed.

Further, wire locking tools 5a and 5b are arranged so as to be opened and closed in the left and right directions in FIG. 1 by an actuator or the like (not shown).

On the upper portions of the wire locking tools 5a and 5b, wire press portions 6a and 6b which press and deform the wire 4 to be crushed portions 4b are formed in opposed arrangement. Further, below the wire press sections 6a and 6b, wire cutting sections 7a and 7b for cutting the wire 4 are provided in opposition.

(Operation) Next, the step of locking the forceps cup 1 and the wire 4 in the method of manufacturing the treatment tool for an endoscope according to the first embodiment will be described in detail.

FIG. 1 shows a state before the wire 4 is locked, in which the wire 4 is inserted into the wire locking hole 3 of the forceps cup 1 up to the bent portion 4a. Although not shown, the forceps cup 1 is held by a member such as a processing jig.

FIG. 2 shows a state in which the actuators and the like are operated and the locking tools 5a and 5b are pressed toward the wire 4 in the direction shown by the arrow.

FIG. 2 shows a wire cutting portion 7b of the wire locking tool 5b and a wire pressing portion 6 of the wire locking tool 5a.
The wire 4 is cut by the cutting process with the wire cutting portion 7a formed on the lower surface of the wire pressing portion 6a.
a, 6b is pressed against the wire 4 to form a pressed portion 4b at the end of the wire 4 by pressing.

FIG. 3 shows a state in which the operation of the actuator and the like is released, and the wire locking tools 5a and 5b are opened outward from the position of the wire 4, respectively.

Thus, the wire cutting section 7a,
7b, the wire 4 is cut to a desired length, and the wire 4 is pressed by the wire press portions 6a and 6b to form a crushed portion 4b shown in FIG. 4 as a result. Shape (cross-sectional shape)
Will prevent the crushing portion 4b from coming out of the wire locking hole 3, and the forceps cup 1
The cutting of the wire 4 and the locking of the wire 4 can be performed all at once by a single machining operation using the wire locking tools 5a and 5b described above.

(Effect) According to the first embodiment described above, in the step of locking the wire 4 in the wire locking hole 3 of the forceps cup 1, the cross-sectional shape of the wire 4 is changed simultaneously with the cutting of the wire 4. It is possible to perform processing and lock the wire 4 to the forceps cup 1, and in the manufacturing process of the forceps, it is possible to reduce the number of work steps for locking the wire 4 for opening and closing power transmission to the forceps and to improve workability. Thus, a method for manufacturing an endoscope treatment tool can be provided.

(Embodiment 2) (Structure) FIGS. 6 to 9 show Embodiment 2 of the present invention, in which a forceps cup 1 and a wire 4 are connected during a manufacturing process of a treatment tool for an endoscope. Each step of stopping is shown. Embodiment 2
Since the same steps as those in the first embodiment are basically adopted in this embodiment, steps different from those in the first embodiment will be mainly described here.

In the second embodiment, a wire supporting member 8a which is driven to be located at a fulcrum of bending of the wire 4 and a bending member 8b which presses the wire 4 in a bending direction are added. Is characterized in that the wire supporting member 8a and the bending member 8b are respectively driven. Other components are the same as those in the first embodiment.

(Operation) The manufacturing process of the second embodiment is basically the same as that of the first embodiment, but here, the different process will be mainly described.

In the first embodiment, the wire 4
Are supplied to the wire locking step in a state of being formed into a predetermined shape, and the wire locking tools 5a and 5b are operated by an actuator or the like (not shown).

That is, the wire press section 6a, 6b and the wire cutting section 7a, 7b are used to cut the wire 4 and simultaneously press the end of the wire 4 to form the crushing section 4b. In the state where the wire 4 is inserted through the wire locking hole 3, the wire 4 is locked so as to prevent or prevent the wire 4 from falling off.

In the second embodiment, as shown in FIG.
The wire 4 which has not been subjected to any processing is fed into the process, and the end of the wire 4 is inserted into the wire locking hole 3 of the forceps cup 1.

Then, as shown in FIG. 7, an actuator or the like (not shown) is actuated to press the end of the wire 4 by the wire press portions 6a and 6b in the wire locking tools 5a and 5b, and to cut the wire cutting portions 7a and 7b. The cutting process of the wire 4 by 7b is performed simultaneously, and the formation of the crushed portion 4b and the cutting of the unnecessary portion of the wire 4 are executed.

At the same time, by pressing the wire bending portion 8b against the wire 4, the bending portion 4a is also formed on the wire 4.

That is, the wire supporting member 8a holds the bending fulcrum of the wire 4 from one side by the operation of an actuator or the like (not shown), and presses the wire bending member 8b against the wire 4 from the opposite side. The wire 4 is bent at a right angle as shown.

FIG. 8 shows that the wire 4 is bent at a right angle to form a bent portion 4a and then actuated by an actuator or the like.
This shows a state where the wire locking tools 5a and 5b are opened in the direction of the arrow. FIG. 9 shows a bent portion 4 a and a crushed portion 4 b of the wire 4 locked to the forceps cup 1.

(Effect) According to the second embodiment described above, in the step of locking the wire 4 in the wire locking hole 3 of the forceps cup 1, the crushing that changes the cross-sectional shape of the wire 4 simultaneously with cutting is performed. By forming the bent portion 4a of the wire 4 in addition to the processing of the portion 4b, the wire 4 which has not been subjected to any processing as it is as the wire material is put into the process, and the forceps cup 1 is efficiently retained in the forceps cup 1. Alternatively, it can be locked in a state in which it is prevented from coming off.

Accordingly, in the manufacturing process of the cup 1, the number of steps for locking the opening / closing power transmission wire 4 to the cup 1 can be further reduced, the workability can be improved, and the manufacturing process can be easily automated. It is possible to provide a method of manufacturing a treatment tool for an endoscope that can be realized.

[0056]

According to the first aspect of the present invention, when the wire is locked in the wire locking hole of the forceps, a process of forming a crushed portion by deformation of the wire shape is performed simultaneously with cutting.
Provided is a method of manufacturing a treatment tool for an endoscope that can reduce the number of work steps and improve workability of locking a power transmission wire to a forceps in a forceps manufacturing process by locking the forceps and a wire. can do.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, even when an unprocessed wire is used, a bent portion can be formed at the same time as the formation of the cut and crushed portions. It is possible to provide a method for manufacturing a treatment tool for an endoscope which can reduce the number of work steps and improve workability.

According to the third aspect of the present invention, it is possible to provide a method of manufacturing a treatment tool for an endoscope which can reliably prevent a wire from coming off from a forceps.

[Brief description of the drawings]

FIG. 1 is a process explanatory view showing a press during a process of locking a wire to a forceps cup and a process immediately before cutting in a treatment tool for an endoscope according to a first embodiment.

FIG. 2 is a process explanatory diagram showing a pressing and cutting process in a process of locking a wire to a forceps cup in the treatment tool for an endoscope according to the first embodiment.

FIG. 3 is a process explanatory diagram after pressing and cutting in the step of locking the wire to the forceps cup in the endoscope treatment tool according to the first embodiment.

FIG. 4 is a partial cross-sectional view showing a bent portion and a crushed portion of the wire locked to the forceps cup according to the first embodiment.

FIG. 5 is a plan view and a partial cross section of the forceps cup according to the first embodiment.

FIG. 6 is a process explanatory diagram showing a press during a process of locking a wire to a forceps cup and a process immediately before cutting in the endoscope treatment tool according to the second embodiment.

FIG. 7 is a process explanatory diagram showing a pressing and cutting process in a process of locking a wire to a forceps cup in the endoscope treatment tool according to the second embodiment.

FIG. 8 is an explanatory view of a step in a step of locking a wire to a forceps cup in the endoscope treatment tool according to the second embodiment and a step after cutting and cutting.

FIG. 9 is a partial cross-sectional view showing a bent portion and a crushed portion of a wire locked to a forceps cup according to the second embodiment.

FIG. 10 is a schematic perspective view of a conventional endoscope treatment tool.

FIG. 11 is a plan view showing forceps of a conventional endoscope treatment tool.

FIG. 12 is a side view showing a forceps of a conventional endoscope treatment tool.

FIG. 13 is a partially omitted side view of forceps of a conventional endoscope treatment tool.

[Explanation of symbols]

 Reference Signs List 1 forceps cup 2 rotation center hole 3 wire locking hole 4 wire 4a bent portion 4b crushing portion 5a wire locking tool 5b wire locking tool 6a wire press portion 6b wire press portion 7a wire cutting portion 7b wire cutting portion 8a wire support member 8b bending member

Claims (3)

[Claims] 1. A method of manufacturing a treatment tool for an endoscope, wherein a wire for transmitting power for opening and closing operations is locked to a pair of forceps whose ends can be opened and closed, thereby forming a link mechanism of the forceps. When locking in the wire locking hole of the forceps,
A method of manufacturing a treatment tool for an endoscope, comprising a step of using one tool to deform the end of a wire to be cut at the same time as cutting the wire. 2. A method of manufacturing a treatment tool for an endoscope, wherein a wire for transmitting power for opening and closing operations is inserted into and locked by a pair of forceps whose ends can be opened and closed, When locking the wire in the wire locking hole of the forceps,
Using a single tool to deform the end shape of the wire to be cut at the same time as cutting the wire, and, in conjunction with the wire cutting and deforming the end shape, inserting the wire into the forceps with a bending tool Bending the vicinity of the part. 3. The method according to claim 1, wherein the deformation of the wire shape is performed by pressing the wire end simultaneously with cutting the wire to form a crushed portion.
A method for producing the treatment tool for an endoscope according to the above.