JP2002059235A - Method of manufacturing seaming needle with yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that when a semiarc shape is imparted to a barrel part of a seaming needle material 31, the seaming needle material can not be supported on groove parts 33 of a turret 32. SOLUTION: A semiarc shape is imparted to the seaming needle material 13 which is arranged with a sharp needle tip part 2 at a tip part of the barrel part 3. The seaming needle material 13 is constituted so that a base end part 4 is exposed between long size soft materials 14a, 14b, is set orthogonal to the longitudinal direction of the long size soft materials 14a, 14b, and plural seaming needle materials 13 are arranged/held at a prescribed interval. The long size soft materials 14a, 14b are intermittently transferred along the long size soft materials 14a, 14b. The base end part 4 of the seaming needle material 13 is subjected to laser machining at a first prescribed position B, a prepared hole 16 is pierced. At a second prescribed position C, by boring the prepared hole 16, a mounting hole part 5 is formed. A seaming yarn 6 is inserted into the mounting hole 5, caulking the mounting hole 5, the seaming yarn 6 is caulked. The boring is conducted by reaming.

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 a suture needle with a thread.

[0002]

2. Description of the Related Art A surgical needle with a thread is provided with a sharp needle tip at the tip of a body formed in a semicircular arc shape.
A suture is inserted into an attachment hole formed along the length direction of the torso from the base end of the torso toward the distal end side, and caulked, and the suture needle is pierced into a living body. In some cases, the suture is prevented from falling off from the suture needle.

Conventionally, as shown in FIG. 9, the above-mentioned suture needle with a thread is provided with a linear suture needle material 31 having a sharp needle tip at a tip thereof, and is provided around a turret 32 along an axial direction. It is manufactured by supplying one by one to the plurality of grooves 33. The turret 32 is intermittently rotated by a predetermined angle, and annealed to the base end of the suture needle material 31 supported by the groove 33 at predetermined positions along the rotation direction, chamfering the outer periphery, and suturing the suture. Drilling of a mounting hole to be caulked and chamfering of an opening of the mounting hole are performed. Drilling of the mounting hole is performed by laser processing, drill processing, or the like.

When the above-mentioned processes are completed, the suturing needle material 31a taken out of the groove 33 is bent to shape the body into a semicircular arc to form the suturing needle material 31b. After further performing a heat treatment and a chemical treatment on the suture needle material 31b, the needle tip is coated with a silicone resin to improve the lubricity of the needle. Then, a suture is inserted into a mounting hole formed in the base end of the suture needle material 31b, and the mounting hole is swaged, so that the suture is stopped by the mounting hole. An attached suture needle (not shown) is obtained.

In the conventional manufacturing method, the turret 32
Is performed intermittently while rotating the suture needle material 3.
1 is supported in the groove 33 of the turret 32 so that it can be performed automatically. However, the subsequent processes are difficult to automate, and in particular, the process of caulking the suture in the mounting hole must be performed by manually supplying the suture needle material 31b one by one to the caulking device. There is.

Further, in the conventional manufacturing method, after the attachment hole is formed in the suture needle material 31, the suture needle material 31 is removed.
Since the body of a is shaped into a semicircular arc and subjected to heat treatment, chemical treatment, coating of silicone resin, etc., the mounting holes are not affected by the above-mentioned treatments. Special measures must be taken to protect the mounting holes so that they are not filled with silicone resin.

In view of the above circumstances, it is conceivable that the body of the suturing needle material 31 is previously bent to give a semicircular shape prior to the formation of the mounting hole. However, if the body of the suturing needle material 31 is given the semicircular arc shape, there is a disadvantage that the suturing needle material cannot be supported by the groove 33 of the turret 32.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a manufacturing method capable of solving such inconvenience and easily manufacturing a suture needle with a thread.

[0009]

In order to achieve the above object, a manufacturing method according to the present invention is characterized in that a suture needle material having a sharp needle tip at a tip end of a body is bent to form a half on the body. A step of providing an arc shape, and two long flexible materials in which a suture needle material having a semicircular shape provided to the body is peelably bonded via a heat-welding adhesive. In the meantime, the proximal end of the suture needle material is exposed from the elongated flexible material so as to be orthogonal to the longitudinal direction of the elongated flexible material, and the plurality of the suture needle materials are spaced at a predetermined interval. Arranging and holding the elongate flexible material intermittently in the longitudinal direction while intermittently transporting the elongate flexible material at a first predetermined position while holding the suture needle at the first predetermined position Apply laser processing to the base end of the material and drill a pilot hole from the base end toward the tip end along the length direction of the body. And at a second predetermined position, the suture is crimped by boring the prepared hole of the suture needle material sandwiched between the elongated flexible materials to shape the inner surface shape. Forming a mounting hole, inserting a suture into the mounting hole of the suture needle material sandwiched between the elongated flexible materials, caulking the mounting hole, and caulking the suture; And a process.

According to the manufacturing method of the present invention, first, a sharp needle tip is formed at the tip of a steel wire or the like obtained by drawing a steel, and the suture needle material cut to a predetermined length is Bending is performed in advance to give a semicircular shape to the body of the suture needle material. In this way, since the mounting holes are formed after the bending process is performed, it is necessary to protect the mounting holes during heat treatment, chemical treatment, and silicone resin coating accompanying the bending process. Disappears.

Next, in the manufacturing method according to the present invention, a base end portion of the suture needle material is exposed from the long flexible material between two long flexible materials. , And a plurality of the suturing needle materials are arranged at predetermined intervals so as to be sandwiched by the elongated flexible material. Then, while the long flexible material is intermittently conveyed in the longitudinal direction, at predetermined positions, a pilot hole is formed in the base end of the suture needle material by laser processing, and the pilot hole is formed. The mounting holes are formed by boring and shaping the inner surface shape.

The drilling of the pilot hole can be performed by drilling. However, since the drilling requires the use of a very small diameter drill, there is a problem that the drill is easily broken. Therefore, in the manufacturing method of the present invention, it is preferable that the pilot hole is formed by laser processing that is easy to process.

[0013] By the way, if an attempt is made to form a mounting hole having a sufficient depth for inserting and securing a suture by the laser processing, a portion having a larger diameter than the opening is provided inside the mounting hole. In the portion, a tapered mounting hole is formed. When the suture is inserted and crimped into the mounting hole formed in the shape, the opening of the mounting hole bites into the suture, and the suture is easily cut at the opening.

Therefore, in the manufacturing method of the present invention, the internal shape is shaped by boring the prepared hole drilled by the laser processing so that the opening has the same or larger diameter as the inside. A mounting hole. The boring can be performed by drilling or reaming, but is preferably performed by reaming because the feed rate can be increased and the tool is less likely to break and is inexpensive.

In the reaming process, a relatively large rotational torque is applied to the suture needle material.
There is a concern that the suture needle material may rotate with the reamer.
However, in the manufacturing method of the present invention, since the suture needle material is sandwiched between the two long flexible materials, the co-rotation can be prevented.

Next, in the manufacturing method of the present invention, a suture is inserted into the mounting hole to stop the swaging while the suture needle material is held between the long flexible materials.

In this manner, the process of automatically piercing the attachment hole in the suturing needle material can be performed without using the turret having a groove around the conventional manufacturing method. it can. Also, after the attachment hole is formed, when a suture is inserted into the attachment hole and crimped, the suture needle material is automatically supplied to the caulking device one by one without being manually supplied. Can be done

Therefore, according to the manufacturing method of the present invention, a suture needle with a thread can be easily manufactured.

[0019]

Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a suture needle with a thread obtained by the manufacturing method of the present embodiment, and FIGS. 2 to 8 are views schematically showing steps of the manufacturing method of the present embodiment.

As shown in FIG. 1, a suture needle 1 with a thread according to the present embodiment has a body 3 formed in a semicircular shape having a sharp needle tip 2 at a distal end, and a base end of the body 3. It comprises a mounting hole 5 drilled along the length direction of the body 3 from 4 toward the distal end side, and a suture thread 6 inserted into the mounting hole 5. The suture 6 is fixed by a caulking portion 7 having an outer surface parallel to the outer surface of the base end portion 4 and having a diameter reduced from the base end portion 4.

Next, a method of manufacturing the suture needle 1 with a thread shown in FIG. 1 will be described.

In this embodiment, as shown in FIG. 2 (a), first, a tip portion 12 of a linear steel wire 11 obtained by drawing and straightening a raw steel material is pressed, and then a grinder or the like is used. The tip is sharpened by buffing, and further polished by buffing, grinding stone polishing, electrolytic / chemical polishing or the like to form the needle tip portion 2. Next, the steel wire 1 on which the needle tip 2 is formed is cut into a predetermined length to form a suture needle material 13. The suturing needle material 13 is then bent to obtain the material shown in FIG.
(B) As shown in the figure, a shape is provided in which a sharp needle tip 2 is provided at the tip of a body 3 formed in a semicircular arc shape. The suture needle material 13 is subsequently subjected to a heat treatment and a chemical treatment, and then coated with a silicone resin to reduce the frictional resistance of the needle. At this time, since the attachment hole 5 is not yet formed in the suture needle material 13, the heat treatment, the chemical treatment, and the coating of the silicone resin can be performed without considering any influence on the attachment hole 5.

Next, as shown in FIG. 3, two cloth tapes 14a and 14b, which are releasably adhered to a plurality of suture needle materials 13 via a hot-melt adhesive such as a hot melt adhesive.
, And are arranged and held at predetermined intervals. Cloth tape 14
A window 15 is provided at one end of each of the a and 14b in accordance with an interval at which the plurality of suturing needle materials 13 are arranged. It is exposed and arranged so as to be orthogonal to the longitudinal direction of the cloth tapes 14a and 14b.

Next, the cloth tapes 14a and 14b having the plurality of suturing needle materials 13 interposed therebetween are moved along the longitudinal direction by the same length as the interval at which the suturing needle materials 13 are arranged.
Convey intermittently. In the present embodiment, the cloth tape 14a,
Processing stages A, B, C, D, and E are provided at positions facing the base end 4 exposed from the window portion 15 when the cloth tapes 14a and 14b stop along the transport path of 14b. The base end 4 is continuously processed.

As the cloth tapes 14a and 14b are conveyed as described above, the outer periphery of the base end portion 4 of the suture needle material 13 is first chamfered on the processing stage A, and then the laser processing is performed on the processing stage B. Is applied. As a result, as shown in FIG. 4, a prepared hole 16 is formed in the base end portion 4, extending from the base end portion 4 toward the distal end portion along the length direction of the body 3. The pilot hole 16 has an opening 17 at the proximal end 4 of the suture needle material 13, a portion 18 having a larger diameter than the opening 17, and a tapered inner portion.

Next, the suturing needle material 13 is moved to the processing stage C
Is subjected to reaming. The reaming is, for example,
As shown in FIG. 5 (a), a taper reamer 20 provided on both sides with a blade 19 having a predetermined angle of inclination with respect to the length direction.
It is performed by As a result, the prepared hole 16 is bored by the taper reamer 20, and as shown in FIG. 5B, has a conical inner surface shape 21 whose diameter gradually decreases from the opening 17 side toward the distal end portion. The opening 17
Is formed with a mounting hole 5 having a larger diameter than the inside.

As described above, the suture needle material 13 has the semicircular body 3 sandwiched between the cloth tapes 14a and 14b and fixed by a heat-welding adhesive such as a hot melt adhesive. It is prevented from rotating together with the reamer 20 during the reaming, and the boring is easily performed.

Next, the suture needle material 13 is placed on the processing stage D
Then, the chamfering process is performed on the opening 17 of the mounting hole 5, and further, it is cleaned and dried on the processing stage E.

By performing the processing as described above, the sewing needle material 13 sandwiched between the cloth tapes 14a and 14b continuously processes the processing stages A to E with the intermittent conveyance of the cloth tapes 14a and 14b. It is applied to Further, when one suturing needle material 13 is subjected to the processing of the processing stage B, the other suturing needle material 13 is sandwiched between the cloth tapes 14a and 14b so that the processing of the processing stage A is performed. The processing of the processing stages A to E is successively performed on the plurality of suturing needle materials 13 sequentially performed, so that the processing can be performed efficiently.

In FIG. 3, for the sake of simplicity, the processing stages A to E are provided at intervals of a plurality of sewing needle materials 13 held between the cloth tapes 14a and 14b. However, the processing stages A to E may be provided at a plurality of the intervals in consideration of the size of the device of each processing stage.

When the processing of the processing stages A to E is completed, the cloth tapes 14a and 14b are wound in a coil shape while holding the suture needle material 13 having the mounting hole 5 formed therebetween. Then, the cloth tapes 14a and 14b wound in a coil shape are sent to the next caulking step in coil units.

Next, in the caulking step, the cloth tapes 14a,
14b is pulled out of the coiled state and is intermittently conveyed at a predetermined interval, so that FIG.
As shown, the suturing needle material 13 is supplied to a processing stage F provided along the cloth tapes 14a and 14b to be conveyed. After the suture thread 6 is inserted into the mounting hole 5 at the processing stage F, the suture needle material 13 is moved up and down by caulking dies (not shown) provided above and below the cloth tapes 14a and 14b. To form a caulked portion 7. As a result, the suture needle 1 with a thread in which the suture thread 6 is swaged to the swaged portion 7 while being held between the cloth tapes 14a and 14b is obtained.

On the downstream side of the processing stage F, the thread-attached suture 1 remelts a hot-melt adhesive such as a hot-melt adhesive that adheres the cloth tapes 14a and 14b, and the cloth tapes 14a and 14b are melted. 14b can be taken out by peeling each other.

In the caulking process, the mounting hole 5 is
(B) As shown in the figure, when the conical inner surface shape 21 whose diameter is gradually reduced from the opening 17 side toward the distal end portion is provided, the caulking mold having a cylindrical pressing portion is used. . As a result, as shown in FIG. 7, the mounting hole portion 5 is swaged while holding the conical inner surface shape 21 whose diameter gradually decreases from the base end portion 4 toward the distal end portion. With a small diameter portion 24 of
The inner diameter A of the opening 17 is larger than the inner diameter B of the small diameter part 24 (A
> B). As a result, the suture 6 is caulked by the small-diameter portion 24 at the intermediate portion of the mounting hole portion 5 over the entire circumference, thereby preventing the suture 6 from falling off at the time of piercing. Further, since the attachment hole 5 has the largest diameter at the opening 17, the shearing force on the suture 6 at the opening 17 is reduced, and the suture 6 is prevented from being cut at the time of caulking. it can.

In this embodiment, the reamer processing in the processing stage C is performed by the taper reamer 20 shown in FIG.
(A) As shown in the figure, a parallel reamer 23 having blades 22 parallel to each other on both sides may be used. In this case,
The prepared hole 16 is bored by a parallel reamer 23, and is shaped so as to have a cylindrical inner surface shape 24 having the same diameter from the opening 17 side to the tip end as shown in FIG. The part 5 is formed.

When the mounting hole 5 has a cylindrical inner surface shape 24 having the same diameter from the opening 17 side to the tip end, in the working stage F, the pressing portion is
The base end portion 4 is pressed from above and below by a conical caulking die (not shown) that gradually decreases in diameter from the base end portion 4 toward the tip end portion provided with the needle tip portion 2. Thus, the suture needle with thread 1 is formed. 7, the mounting hole 5 has a conical shape whose diameter gradually decreases from the base end 4 toward the distal end, and the inner diameter A of the opening 9 is smaller than that of the small diameter portion 14. The inner surface shape is larger than the inner diameter B (A> B), and the suture thread 6 is swaged in the mounting hole 5.

In the above embodiment, the cloth tapes 14a, 14b are used as the long flexible material for holding the suture needle material 13.
However, a paper tape or a synthetic resin film tape may be used in place of the cloth tape, and other kinds of materials may be used in combination with each other.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a suture needle with a thread obtained by a manufacturing method according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing steps of a manufacturing method according to one embodiment of the present invention.

FIG. 3 is a view schematically showing steps of a manufacturing method according to one embodiment of the present invention.

FIG. 4 is a view schematically showing steps of a manufacturing method according to one embodiment of the present invention.

FIG. 5 is a view schematically showing steps of a manufacturing method according to one embodiment of the present invention.

FIG. 6 is a view schematically showing steps of a manufacturing method according to one embodiment of the present invention.

FIG. 7 is a view schematically showing steps of a manufacturing method according to one embodiment of the present invention.

FIG. 8 is a view schematically showing steps of a manufacturing method according to one embodiment of the present invention.

FIG. 9 is a view schematically showing steps of a conventional manufacturing method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... suture needle with thread, 2 ... needle tip part, 3 ... trunk part, 4 ... base end part, 5 ... mounting hole part, 6 ... suture thread, 7 ... caulking part, 13 ... suture needle material, 14a, 14b ... Long flexible material, 16: pilot hole, 20, 23: reamer, B:
First predetermined position, C... Second predetermined position.

Claims (2)

[Claims] 1. A step of bending a suture needle material having a sharp needle tip at a tip end of a body to give the body a semi-arc shape, and a semi-arc shape to the body. The suture needle material provided with is attached between two long flexible materials releasably via a heat-welding adhesive, and the base end of the suture needle material is the long flexible material. Exposing the elongated flexible material to be orthogonal to the longitudinal direction of the elongated flexible material, and arranging and clamping the plurality of suture needle materials so as to have a predetermined interval; and At the first predetermined position, the base end of the suture needle material sandwiched between the elongated flexible materials is subjected to laser processing at a first predetermined position while being intermittently conveyed along the direction, and the base end is moved from the base end to the distal end side. Drilling a pilot hole along the length direction of the body portion toward the body; and sewing at a second predetermined position between the elongated flexible material. Forming a mounting hole in which a suture thread is stopped by shaping the prepared hole of the needle material to form an inner surface shape, and the suture needle material sandwiched between the elongated flexible materials. Inserting a suture into the mounting hole and caulking the mounting hole to stop the suture. 2. The method according to claim 1, wherein the boring is performed by reaming.