JPH06327686A - Suture needle and suture needle with thread, and their production method - Google Patents

Abstract

PURPOSE:To provide a suture needle and a suture needle with thread, and their production method that reduces production procedures and production cost. CONSTITUTION:From one end of a hollow tube 2, a core tube 3 which is almost as long as the hollow tube is projected and welded to the hollow tube, a needle tip 1a is formed by a tip swaging, a blade is formed at the needle tip 1a by polishing, and the resulting needle is bent into a circular arc shape and is heat- treated, then finished to make a suture needle 1, and a suture thread 5 is embedded in the tail of the suture needle 1 to make a suture needle with thread 1A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eyeless type suturing needle which is inexpensive to manufacture, a suture needle with a thread, and a manufacturing method thereof.

[0002]

2. Description of the Related Art A conventional suture needle with a thread using a hollow tube is
It was made by two manufacturing methods as disclosed in JP-A-1-160432.

In the first manufacturing method, one end of the hollow tube closed by welding is subjected to a tip swaging process and a tip polishing process to form a needle tip portion, and the threaded portion at the other end of the hollow tube is formed. Except for the needle body, which is made slightly thinner than the threaded portion by swaging, and then curved into a predetermined shape, the needle body after bending is subjected to finish polishing or heat treatment and finish polishing, and is inserted into the threaded portion. A suture needle with a thread is made by fixing the suture thread to the needle body by caulking or other means.

Further, in the second manufacturing method, a metallic core material which is slightly shorter than the hollow tube is inserted into the hollow tube, and one end of the hollow tube which is flush with the core material is welded and welded to form a welded portion. Is formed into a tapered shape by the tip swaging process,
This tapered portion is sharpened to form a needle tip with a predetermined cross-sectional shape, and the needle body excluding the threaded portion is swaged to make it slightly thinner than the thickness of the threaded portion, and then curved into a predetermined shape. The needle body is subjected to finish polishing or heat treatment and finish polishing, and the suture thread inserted in the threading portion is fixed to the needle body and the core material by caulking or other means to produce a suture needle with thread. It was being done.

[0005]

One end of the hollow tube is closed by welding to form a needle tip, and the suture thread inserted into the other end of the hollow tube is caulked and fixed to the needle body by other means. In the case of the method for producing a suture needle with a thread according to item 1, not only a skilled technique is required for forming the needle tip portion due to the wall thickness of the hollow tube, but also a suture needle with a thread curved into a predetermined shape. However, there is a problem in that the strength of is weakened by high temperature heating during welding.

Further, in the case of the second method for manufacturing the suture needle with thread, which is made of the hollow tube and the core material having a length slightly shorter than that of the hollow tube, the length is different. The hollow tube and the core material are cut in separate steps, and the rear end of the core material and the suture are fixed to the needle body by crimping or other means, which requires many steps for cutting and crimping. In addition to the high manufacturing cost, the length of the welded portion between the hollow tube forming the needle tip and the core becomes long,
There is a disadvantage that the strength of the needle tip portion, which is easily affected by heat due to welding, becomes weak.

The present invention has been made in view of these circumstances, and it is easy to form a needle tip portion, strengthens the strength of a suture needle, and cuts a hollow tube or core and crimps a suture thread. An object of the present invention is to provide a suture needle, a suture needle with a thread, and a method for producing the suture needle, which can reduce the manufacturing cost by reducing the number of steps required.

[0008]

The present invention has been made to achieve the above object, and the first invention is made of a hollow tube and a core having substantially the same length inserted therein. A suture needle, wherein the needle body has a predetermined cross-section obtained by subjecting a hollow core and a hollow core that is protruded and welded by a set length from one end of the hollow tube to a pointed swaging process and a press process. A needle tip portion and a body portion having a shape are formed, the needle tip portion is provided with a cutting edge suitable for a cross-sectional shape by polishing, and the needle body having the cutting edge is curved in an arc shape according to the application. In addition, it is characterized in that the curved surface is subjected to finishing treatment such as surface polishing.

In the suture needle with thread of the second invention, the needle body curved by the procedure of the first invention is subjected to heat treatment and finishing treatment such as surface polishing, and is sutured to the thread attaching hole at the rear end portion. The thread is fixed by crimping or other means.

In the method of manufacturing a suture needle with thread of the third invention, the long hollow tube having the core inserted therein is cut into a predetermined length, and the hollow core is cut from one end of the cut hollow tube. A needle with a predetermined cross-sectional shape by protruding for a set length, welding with the thread mounting hole formed at the other end, and subjecting the center core protruding side and the hollow tube to pointed swaging and pressing By forming a tip part and a body part and performing a polishing process, a cutting edge suitable for the cross-sectional shape is provided on the needle tip part, and after curving the needle tip part and the body part in an arc shape, the needle body is heat treated. And finishing treatment such as surface polishing are performed, and the suture needle is fixed to the thread mounting hole after bending by caulking or other means.

[0011]

The needle tip portion is formed to have a predetermined cross-sectional shape by subjecting the center core to projecting from the one end of the hollow tube by a set length and welding, and then subjecting the tip to swaging to form a predetermined cross-sectional shape. Not only is it easier to perform, but the strength of the needle body does not decrease due to the influence of heat during welding.

Further, since the hollow tube and the core have substantially the same length, when the core is inserted into a long hollow tube, the hollow tube and the core are efficiently cut in one step. It becomes possible. Moreover, the welding of the core to the hollow tube is carried out almost without being affected by high temperature heating, and the strength of the needle body is strengthened by the core welded to the needle tip, and the thread at the rear end is Since only the suture thread inserted into the mounting hole is fixed by crimping or other means, the process required for cutting and crimping is reduced, and the strength of the suture needle and suture needle with thread and its manufacturing method are reduced. To serve with a reasonable manufacturing cost.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the suture needle and the threaded suture needle according to the present invention will be described below with reference to the drawings. FIG. 1 shows a suture needle 1 showing the most general shape in which the whole is curved in an arc shape. The cross-sectional shape of the suture needle 1 is, for example, that of the needle tip side when the tissue of the portion to be sutured is relatively hard. About 1/3 is formed in a triangular shape, about 1/3 of the intermediate portion is formed in a circular shape, and about 1/3 of the remaining needle rear end side is formed in an elliptical shape.

However, the cross-sectional shape of the suture needle 1 may of course be different from that described above depending on the hardness of the tissue of the portion to be sewn, and as the tissue becomes softer, the cross-sectional shape of the needle tip side will change. , It changes from a triangular shape to a circular shape.

The needle tip portion 1a is formed by fusing the hollow core 2 projecting from one end of the hollow tube 2 to the length required for forming the needle tip and welding the hollow core tube 2 to the hollow tube 2 so that the hollow core 3 protrudes. The tip is swaged and pressed to be formed into a predetermined sectional shape having a tip angle θ. A cutting edge suitable for the cross-sectional shape is provided on the needle tip portion 1a by polishing.

The needle body consisting of the needle tip portion 1a and the body portion 1b is subjected to body swaging except for the thread mounting hole 4 formed at the rear end of the hollow tube 2, and then used. It is curved in an arc shape suitable for. After bending, the needle body is heat-treated at a relatively low temperature to improve strength and hardness. Surface stains, oil films, etc. are removed by a finishing method such as a chemical method or polishing by electric discharge, and further, finishing processing such as dehydration or degreasing is performed on the needle body to obtain the suture needle 1.

After the suture thread 5 is inserted into the thread mounting hole 4 at the rear end of the suture needle 1, the hollow tube 2 outside the suture needle 5 is turned from the periphery to be uniformly caulked, and then, An oval or triangular auxiliary caulking is applied according to the cross-sectional shape of the needle rear end side to obtain a suture needle with thread 1A (see FIG. 7).

Next, an example of a method of manufacturing a suture needle with a thread will be described (see FIGS. 2 to 7). (1) A metal core 3 is inserted into a long stainless steel hollow tube 2 having a diameter suitable for the suture needle 1. (2) The long hollow tube 2 having the core 3 inserted therein is attached to the suture needle 1
Cut into a certain length shorter than the length by the set dimension.

(3) The core 3 is projected from one end of the cut hollow tube 2 by a length equal to the length of the thread mounting hole 4,
The hollow tube 2 and the core 3 are welded by welding while leaving the length necessary for forming the needle tip portion. (4) A tip swaging process is applied to the protruding side of the center core 3 to form the needle tip 1a having a tip angle θ, and the needle tip 1a is formed into a predetermined cross-sectional shape by pressing. (5) The needle tip portion 1a is subjected to polishing to provide a cutting edge suitable for the sectional shape. When the cross section is circular, the cutting edge is formed by sharpening the needle tip, and when the cross section is triangular, it is formed, for example, at two positions at both ends of the bottom side.

(6) The main body of the needle excluding the thread mounting hole 4 is subjected to a main body swaging process, and the thickness of that portion is set by the outer diameter of the thread mounting hole 4 (the outer diameter of the hollow tube 2). When the diameter is 0.7 mm, for example, it is reduced by about 0.2 mm). (7) After the needle body is curved in an arc shape suitable for the application and subjected to heat treatment, polishing or polishing and finishing treatments such as dehydration and degreasing are performed to obtain not only dirt and oil film on the surface of the needle body, Removes burrs and discoloration caused by cutting and welding.

(8) The suture thread 5 is inserted into the thread attachment hole 4 formed at the rear end of the needle body, and the hollow tube 2 outside the suture thread 5 is inserted.
After uniformly caulking, the auxiliary suture caulking is performed according to the cross-sectional shape of the needle rear end side, and the suture needle with thread 1A is obtained.

In the above procedure for manufacturing the suture needle with thread,
When it is not necessary to increase the strength or hardness of the needle body after bending depending on the material used, the heat treatment applied to the needle body may be omitted. In addition, it goes without saying that the manufacturing procedure may be partially reversed.

[0023]

Since the present invention is configured as described above, it has the following operational effects.

In the suture needle according to claim 1, the hollow tube and the core having substantially the same length are efficiently cut in a single cutting step by inserting the core into the hollow tube. it can. In addition, by projecting the core from one end of the cut hollow tube, fusing it leaving the length necessary for forming the needle tip, welding it to the hollow tube in that state, and performing tip swaging on that part. When the needle tip is formed by applying it, the length of the thread mounting hole can be known from the protruding length of the core, and the welding time of the core is shortened, and the needle tip is adversely affected by high temperature heating. Therefore, a suture needle having high strength can be provided inexpensively and easily.

In the suture needle with a thread according to a second aspect of the present invention, the suture needle having the structure described in the preceding paragraph is formed by inserting the suture thread into the thread attachment hole and fixing it by caulking or other means. Since the rear end portion of the core is not fixed by crimping, it is possible to provide a suture needle with a thread having high strength and high hardness efficiently and at low cost by reducing the steps and steps required for cutting and crimping. .

In the method for manufacturing a suture needle with thread according to a third aspect of the present invention, the hollow tube and the core are cut by inserting the core into a long hollow tube and projecting from one end of the hollow tube. The core is melted and cut, leaving the necessary length at the needle tip, the needle tip is formed by welding the core to the hollow tube and then the tip swaging, and the needle body is heat treated after bending. Since the suture thread is fixed by caulking in the thread attachment hole on the side opposite to the needle tip, the hollow tube and the core are cut in one step,
Welding and tip swaging are easy, the needle tip is not adversely affected by high temperature heating during welding, and the caulking process at the rear end of the core is not required, so the manufacturing cost is low and the strength and hardness are improved. A suitable method for producing a suture needle with a thread can be provided.

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing an embodiment of a suture needle.

FIG. 2 is a partial cross-sectional front view showing a state in which the hollow tube and the core are cut at a time in one embodiment of the method for manufacturing the suture needle with thread of the present invention.

FIG. 3 is a partial cross-sectional front view showing a welded state of a hollow tube and a core.

FIG. 4 is a front view showing a state after forming a needle tip portion.

FIG. 5 is a partial cross-sectional front view showing a state after the main body swaging process.

FIG. 6 is a front view of the suture needle that has been heat-treated and finished after being bent.

FIG. 7 is a partial cross-sectional front view showing a state in which a suture is fixed to form a suture needle with a thread.

[Explanation of symbols]

 1 Suture Needle 1A Suture Needle with Thread 1a Needle Point 1b Body 2 Hollow Tube 3 Middle Core 4 Thread Attachment Hole 5 Suture Thread

Claims (3)

[Claims] 1. A suture needle made of a hollow tube and a hollow core inserted into the hollow tube and having substantially the same length, wherein the needle body is protruded from one end of the hollow tube by a set length. By subjecting the welded core and hollow tube to pointed swaging and pressing, a needle tip and body with a predetermined cross-sectional shape are formed, and the needle tip is suitable for cross-sectional shape by polishing. The suture needle is provided with a cutting blade, and the needle body having the cutting blade is curved in an arc shape according to the application, and the curved surface is subjected to finishing treatment such as surface polishing. . 2. A suture needle with a thread, which is made of a hollow tube and a core inserted into the hollow tube and having substantially the same length, wherein the needle body has a length set from one end of the hollow tube. By subjecting the hollow core and the hollow core, which are projected and welded, to the tip swaging and pressing, a needle tip portion and a body portion having a predetermined cross-sectional shape are formed, and the needle tip portion is cross-sectionally shaped by polishing. The needle body equipped with a cutting blade is curved in an arc shape according to the application, and after the bending, heat treatment and finishing treatment such as surface polishing are applied. A suture needle with a thread, which is inserted into a thread mounting hole formed at a rear end portion of the thread and fixed to a needle body by caulking or other means. 3. A long hollow tube having a core inserted therein is cut into a predetermined length, the hollow core is projected from one end of the cut hollow tube by a set length, and a thread is provided at the other end. Weld with the mounting holes formed, and perform sharp swaging and pressing on the protruding side of the core and the hollow tube to form the needle tip and body of the specified cross-sectional shape, and then perform the polishing process. By applying a cutting edge suitable for the cross-sectional shape to the needle tip and curving the needle tip and the body in an arc shape, the needle body is subjected to heat treatment and finishing treatment such as surface polishing. A method for producing a suture needle with a thread, characterized in that the suture thread is fixed to the thread mounting hole by crimping or other means.