JPH0494834A - Manufacture of sewing needle having pentagonal section - Google Patents

Abstract

PURPOSE:To execute the cutting work without high skillfulness and to reduce the manufacturing cost by forming the intermediate needle of the straight type, machining the triangular ridge part of this intermediate needle, forming the blade setting surface and composing the blade at the same time. CONSTITUTION:The thread fitting drum part of the intermediate needle 1a is clamped with the vice 12 and the axial line of the needle 1a is arranged almost in the right angle direction against the running direction of the machining material 13. The intermediate needle 1a is rotated about the axial line of needle 1a corresponding to the angle of the blade setting surface 4 to the plane surface of blade 3 set preliminarily. The ridge 8 of the blade surface part 3 is pressed to the machining material 13, this ridge 8 is machined to form the blade setting surface 4, and at the same time, the cutting blade 6 is formed at the edge crossing the blade cutting surface 4 with the plane 5. One side ridge 8 which is the part corresponding to the cutting blade of triangle part is machined to form the blade setting surface 4, the cutting blade 6 is formed on the edge crossing this blade setting surface 4 with the plane 5, then the other ridge 8 is machined to form the blade setting surface 4 and also the cutting blade 6 is formed. The curving work is executed to the intermediate needle 1a composed of the cutting blade 6, and formed to the prescribed curved shape.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a triangular suture needle having a pentagonal cross section with cutting surfaces formed at both ends of the flat blade portion.

<Prior Art> Surgical suture needles used for suturing living tissues include nine needles and triangular needles depending on the cross-sectional shape between a predetermined length from a needle point formed at the tip.

There are various types such as stubble-like needles. Each of the suture needles has its own unique characteristics, and during suturing surgery, these suture needles are used depending on the nature of the suture site (vascular tissue, liver tissue, muscle tissue, etc.).
It is used selectively depending on the eyeball tissue, etc.).

Among these, the triangular needle 51 shown in FIG. 11 has a high resistance to bending and is widely used as a surgical suture for suturing muscle tissue and the like. This triangular needle 51 has a flat blade portion 52.
The edges 53 on both sides of the blade are configured as cutting blades, and the ridges 54 are rounded without providing any function as a cutting blade.

As shown in FIG. 12, when the triangular needle 51 is gripped by the needle holder 61, the gripping part 62 formed on the needle holder 61 comes into contact with the edge 53 and damages it, reducing the penetrability of the triangular needle 51. It may cause loss of sharpness.

In order to solve the above problem, the present applicant formed a cutting surface 55 by grinding the edge 53 of the blade flat part 52 in a direction approximately perpendicular to the needle length direction, as shown by the two-dot chain line in FIG. He developed a suture needle with a pentagonal cross section and obtained a utility model patent (Utility Model Publication No. 51-39429, Publication No. 55-41).
No. 208, No. 61-6885, etc.).

A suture needle having the above-mentioned pentagonal cross section (hereinafter referred to as "pentagonal needle")
In this case, a cutting edge 57 is formed at the edge formed by the flat surface 56 and the cutting surface 55 that constitute the peak 54.

Then, by grinding the edge 53 of the flat blade portion 52 of the triangular needle 51 in a direction approximately perpendicular to the needle length direction to form a bladed surface 55, the cutting edge 57 is formed into a saw blade shape with fine irregularities. , a suture needle with good cutting quality can be obtained.

Furthermore, when the pentagonal needle is gripped by the needle retainer 61, the cutting blade 57 does not come into contact with the gripping part 62, so the cutting blade 57 is not damaged and good piercing performance and sharpness are maintained. You can.

The pentagonal needle above has a minute thickness (0.07mm to 1.4mm)
and a length (5 mm to 65 mm). The dimensions of the bladed surface 55 formed on this pentagonal needle are 1
．． The diameter of the zero-barrel needle is approximately 0.1 mm, and the angle of the cutting edge 57 formed by the cutting surface 55 and surface 56 is 65 degrees to 7 degrees.
It is set to 0 degrees.

Surgical suture needles are required to have low resistance when piercing living tissue and low resistance when cutting living tissue. Therefore, when manufacturing the pentagonal needle, first the external shape (the cross-sectional shape at a predetermined length from the needle tip, the curved shape of the needle, etc.) is formed into a predetermined shape, and then the final step is to form a predetermined shape. Grinding the part to form a cutting edge is performed.

That is, the needle tip is formed by pressing and polishing the end of an austenitic stainless steel wire having the diameter and length necessary to manufacture the desired pentagonal needle, and
A predetermined length from the needle tip is formed into a triangular pyramid shape with a triangular cross section and each side shaped like a bamboo leaf, and a through hole or blind hole for connecting the suture thread is formed at the other end. Form a triangular straight needle.

Next, the triangular curved needle 51 having a predetermined curved shape is formed by bending the triangular straight needle using the technique disclosed in Japanese Patent Publication No. 60-18256.

Next, the worker grasps one triangularly curved needle 51, and as shown in FIG.
A cutting surface 55 is formed by pressing the edge 53 against the circumferential surface of the Arkansas grindstone 63 and grinding by swinging it, and an edge where this cutting surface 55 and the surface 56 forming the peak 54 intersect is formed. A cutting edge 57 is formed to form a pentagonal needle. And the blade surface 55. The pentagonal needle with the cutting edge 57 formed thereon is pickled to produce the desired pentagonal needle.

<Problems to be Solved by the Invention> The pentagonal needle having the above shape has many advantages compared to the conventional triangular needle.

However, in the above manufacturing method, since the blade surface is formed by grinding both ends of the flat part of the blade part of the triangular needle that has been previously formed into a predetermined curved shape, the grinding of the triangular needle is performed for each triangular needle. That will happen.

Further, some triangular needles are formed into a curve with the plane part of the blade part as the inner peripheral surface, and others are formed into a curve with the flat part of the blade part as the outer peripheral surface. If the flat part of the blade is formed on the inner peripheral surface,
The grindstone for grinding the side edges of the flat portion must be extremely thin and have an arcuate circumferential surface that serves as the grinding surface.

For this reason, grinding is done using an Arkansas grindstone, but
Such grindstones have a drawback in impact resistance.

In addition, when grinding the cutting surface, the circumferential surface of the Arkansas grindstone is used as the grinding surface, so when pressing the triangular needle against the grinding surface, the angle formed by the tangent to the grinding surface and the flat part of the blade, The angle of the cutting surface with respect to the flat portion is set. In other words, when the triangular needle is pressed against the grinding surface while maintaining the same posture, the angle of the cutting surface with respect to the flat part of the blade will be a different value if the position of the pressing against the grinding surface is different, as shown in Fig. 14. Become. However, the thickness and length of the triangular needle are minute, and the triangular needle is curved, so it is not possible to use a grinding jig, etc. Therefore, grinding is not done by skilled workers. There is.

As described above, when manufacturing triangular needles, the cost required for grinding the cutting surface increases, and it is difficult to manufacture triangular needles with uniform quality.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a suture needle having a triangular cross section with uniform quality while reducing manufacturing costs. Another object of the present invention is to provide a method for uniformly manufacturing suturing needles having a flat blade portion formed on the inner periphery, which has become increasingly common in recent years, and at low cost.

<Means for Solving the Problems> In order to solve the second problem, the method for manufacturing a suture needle having a triangular cross section according to the present invention provides a method for manufacturing a suture needle having a triangular cross section, in which a suture needle having a triangular cross section has blades at both ends of the flat part of the blade portion. A manufacturing method for manufacturing a suture 1 having a triangular cross section which is curved into a predetermined shape while forming a surface, the method comprising: passing a straight needle formed into a predetermined triangular pyramid shape in the traveling direction of a planar abrasive material; The straight needle is arranged approximately perpendicular to the needle, and the straight needle is arranged so that the cutting surface is parallel to the grinding surface of the abrasive material according to the preset angle of the cutting surface with respect to the flat surface of the blade. By rotating around the axis and pressing one side end of the flat part of the blade against a flat abrasive material, the side end is ground to form one cutting surface, and then one cutting surface is formed. Rotate the straight needle around the axis of the needle so that the cutting surface is parallel to the grinding surface of the abrasive material according to a preset angle of the cutting surface with respect to the flat surface of the blade, and Grind the other side end of the flat part by pressing it against a flat abrasive material to form the other cutting surface to form a straight needle with a triangular cross section, and then press the straight needle to the straight needle. It is characterized by being curved into a predetermined shape by performing a curving process.

Effects> According to the above means, it is possible to reduce manufacturing costs and to manufacture triangular needles with uniform quality.

That is, the end of an austenitic stainless steel wire having a diameter and length corresponding to the thickness and length of the target triangle S1 is pressed and polished to form 34 points at the tip, and the needle is A straight needle is formed by forming a predetermined length from the tip into a triangular pyramid shape with a triangular cross section and each side shaped like a bamboo leaf. The straight needle is disposed, for example, in a direction approximately perpendicular to the running direction of the planar abrasive material, such as the side surface of a disc-shaped grinding wheel or the running plane of a heald-shaped abrasive material, and the straight needle is further arranged on a preset blade. Rotate around the axis so that the cutting surface is parallel to the grinding surface according to the angle of the cutting surface with respect to the flat surface of the blade, and press one side end of the flat surface of the blade against the planar abrasive material. By doing so, it is possible to form one edged surface by grinding the side end in a direction substantially perpendicular to the needle length direction, and at the same time form a cutting edge at the edge of the edged surface and the surface that intersects with the edged surface.

Next, in the same way as the grinding described above, the other side end of the flat part of the blade part is ground in a direction approximately perpendicular to the needle length direction to form the other blade 41 surface, and at the same time, the edge with the surface intersecting the cutting surface is ground. A cutting edge can be formed on the surface.

After forming the straight needle into a pentagonal cross section as described above, the straight needle is subjected to a curving process to curve into a predetermined shape, thereby making it possible to manufacture a triangular needle curved into a predetermined shape. .

<Example> A method for manufacturing a triangular needle using the above-mentioned means will be described below with reference to the drawings.

Figure 1 is a perspective view of the triangular needle, and Figure 2 is the same as in Figure 1.
-■ Cross-sectional view, Figure 3 (a) is a front explanatory view of the triangular needle that is the material of the triangular needle, Figure 3 (b) is a cross-sectional view of the triangular part in Figure (a), Figure 4 (a) and (b) are plan explanatory views showing the relationship between the running direction of the abrasive material and the triangular needle, and Fig. 5 (
a) to (d) are front explanatory views showing the relationship between the abrasive material and the triangular needle, FIGS. 6(a) and (b) are side explanatory views showing the relationship between the abrasive material and the triangular needle, and FIG. Fig. 7(a) is a front explanatory view of a triangular needle with a cutting surface formed thereon, Fig. 7(b) is a side explanatory view of Fig. 7(a), Fig. 8 is a schematic explanatory view of the bending device, Fig. 9
Figure (a) is an explanatory diagram of a high speed steel holding multiple triangular needles;
FIG. 9(b) is an explanatory cross-sectional view of FIG. 9(a), and FIG. 10 is an explanatory view of the high speed steel which is configured to be swingable.

1 and 2 show a pentagonal needle 1 whose cutting edge has a pentagonal cross section. When suturing living tissue with the pentagonal needle 1, the practitioner grasps the body of the needle 1 or the equiangular cross-section portion where the cutting edge 6 is formed with a needle retainer, and pierces and cuts the living tissue with the needle tip 2. The blade 6 makes an incision, and the peak 7. The suturing operation is carried out by forcing the incision part apart by the ridges 8 and passing through the tissue.

The manufacturing method according to the present invention relates to a method for manufacturing the pentagonal needle 1 described above.

1 and 2, a sharp needle tip 2 for piercing living tissue is formed at one end of a pentagonal needle 1, and a predetermined length from this needle tip 2 has a cutting edge. It is structured as part A. The cutting edge A has a cross section that is a flat blade portion 3. Blade surface 4.
It is formed in a pentagonal shape consisting of 41 faces 5, 5, and the edge where the cutting face 4 and the face 5 intersect is formed as a cutting blade 6, and the edge where the faces 5 intersect is cut by the cutting blade 6. It is formed as a peak 7 that has the function of spreading the living tissue.

Further, the part continuous with the cutting edge part A is configured as a triangular part B, and the triangular part B has a triangular cross section consisting of the blade flat part 3 and the surface 5.5, and the blade flat part 3 and the triangular part B have a triangular cross section. The ridge 8 intersecting with the surface 5 has a function of spreading the incised living tissue.

The cross-sectional shape of the triangular part B is the basic shape of the cutting edge part A, and when manufacturing the pentagonal needle 1, the triangular part B including the cutting edge part A is first constructed from the needle tip 2, and this triangular part Both ends (ridges 8) of the blade flat part 3 in B are ground to form the blade surface 4.
The cutting edge part A is constituted by forming.

A thread attachment portion C is formed at the other end of the pentagonal needle 1.

This thread attachment part C has a function of connecting a suture thread (not shown) to the pentagonal needle 1, and in this embodiment, the pentagonal needle l
A cantilever-shaped style 9 is formed at each end in the axial direction, and a through hole 10 is formed between the style 9, so that it is configured as a so-called spring eye.

The portion between the triangular portion B and the thread attachment portion C is configured as a trunk portion having a circular cross section.

The pentagonal needle 1 is preset and curved into a shape. Curved shape of this pentagonal needle 1 (curving radius, bending angle, etc.)
is set depending on the suture site and the properties of the living tissue at the suture site.

As the material of the pentagonal needle 1, it is possible to use stainless steel materials such as austenitic stainless steel, martensitic stainless steel, and precipitation hardening stainless steel.

Next, a method for manufacturing the pentagonal needle 1 having the shape described above will be described in detail.

First, a drawn wire is cut according to the length of the target pentagonal needle 1 to obtain a straight material, and then a thread attachment part C is formed at one end of the material, Needle tip 2 on the other end
At the same time, portions corresponding to the cutting edge portion A and the triangular portion B are formed into a predetermined triangular pyramid shape.

The above-mentioned forming method includes forming a portion of the material corresponding to the cutting edge portion A and the triangular portion B into a conical shape by grinding and polishing, and press-working the conical portion to form a triangular pyramid shape; The parts of the material corresponding to the cutting edge part A and the triangular part B are formed into a triangular prism shape by press working, and the constituting surfaces are polished to form a predetermined triangular pyramid shape.

Even when formed into a triangular pyramid shape by any of the above methods,
Each edge line forming the triangular portion is formed of a curved line, and each surface is formed in the shape of a bamboo leaf.

As described above, a straight needle-shaped intermediate needle 1a is formed, which is an intermediate product of the pentagonal needle 1, in which the body is formed between the triangular pyramid-shaped part and the thread attachment part C (FIG. 3(a)). (see (b)).

Next, the side end of the blade flat portion 3 of the portion corresponding to the cutting edge A of the intermediate needle 1a, that is, the ridge 8 corresponding to the cutting edge A in the four triangular portions B, is ground to form a blade. A surface 4 is formed, and a cutting edge 6 is formed at the edge where the surfaces 4 and 5 intersect.

The intermediate needle 1a has a straight needle shape, and the pentagonal pyramidal portion corresponding to the cutting edge portion A is formed into a curved surface with a slight bulge. Therefore, when grinding the cutting edge surface 4, it is possible to use a planar abrasive material such as the side surface of a disc-shaped grindstone or a belt-shaped abrasive material. Then, the axial center (longitudinal central axis, hereinafter referred to as "intermediate") of the intermediate needle 1a is arranged in a direction approximately perpendicular to the traveling direction of the abrasive material, and the ridges 8, which are both ends of the blade flat part 3, are sequentially pressed. Then, it is possible to form the cutting edge 6 at the same time as grinding the edge 8 and grinding the edged surface 4.

FIG. 4(a) shows a disc-shaped grindstone 11 that can rotate forward and reverse in the direction of the arrow, and the intermediate needle 1a, which grips the body of the thread attachment part C1 with a high-speed steel 12, is placed approximately perpendicular to the running direction of the grindstone 11. FIG. 4 is an explanatory diagram of a case where the cutting surface 4 is ground by arranging the intermediate needle 1a in the direction and pressing the intermediate needle 1a against the side surface 11a.

The diameter of the disc-shaped grindstone 11 is not particularly limited. However, the intermediate needle 1a has a straight needle shape, and the grindstone 1 is used as a grinding surface.
Since the flat part of the side surface of the needle 1 is used, a plurality of intermediate needles 1 can be used.
It is possible to simultaneously grind a. For this reason, it is preferable that the diameter of the grindstone 11 has a value corresponding to the number of intermediate needles 1a to be simultaneously ground. That is, by increasing the diameter of the grindstone 11, the number of intermediate needles 1a that can be simultaneously ground increases.

In addition, in the same figure (b), a heald-shaped abrasive material 13 that can rotate normally and reversely in the direction of the arrow is used, and an intermediate needle 1a held by a high speed steel 12 is disposed approximately perpendicular to the running direction of the abrasive material 13. FIG. 3 is an explanatory diagram when the cutting surface 4 is ground by pressing the needle 1a against the abrasive material 13;

In the figure, the heald-shaped abrasive material 13 is a long synthetic resin sheet or metal sheet with abrasive grains such as white arundum fixed thereto.

The heald-shaped abrasive material 13 is wound around a feed-out roller (not shown) in an unused state, and is fed out from the roller and wound around two rollers 13a, and then ground after being subjected to grinding processing on the intermediate needle 1a. The material 13 is configured to be wound up by a winding roller (not shown). Further, one roller 13a is connected to a drive device (not shown), and a support plate 13b is placed between the two rollers 13a.
is provided.

Here, the operation when grinding the cutting surface 4 of the intermediate needle 1a with the belt-shaped abrasive material 13 is shown in FIGS. 5(a) to 5(d).
This will be specifically explained using FIGS. 6(a) and 6(b).

In addition, the grinding work described below is performed on the side surface 11 of the disc-shaped grindstone 11.
The same applies to the case of a.

As shown in FIG. 4(b), the thread attachment portion C2 of the intermediate needle 1a
While gripping the body part with the vise 12, the needle 1a
The axis of the abrasive material 13 is arranged in a direction approximately perpendicular to the direction of the arrow, which is the running direction of the abrasive material 13. At this time, the blade flat part 3 of the intermediate needle 1a is set parallel to the surface of the abrasive material 13 (see Fig. 5(a)).
reference).

Next, the intermediate needle 1a is rotated around the axis of the needle 1a in accordance with a preset angle of the cutting surface 4 with respect to the flat surface 3 of the blade. That is, when the angle of the cutting edge 6 is set in advance as 70 degrees and the cross-sectional shape of the portion corresponding to the cutting edge A is a right-angled isosceles triangle, the angle of the cutting surface 4 with respect to the flat part 3 of the cutting edge is 25 degrees. degree. Therefore, in this case, the intermediate needle 1a is rotated 25 degrees around the axis (see Fig. 5).
b)).

By rotating the intermediate needle 1a around the axis as described above, one ridge 8 of the blade flat portion 3 in the cutting edge portion A will face the grinding surface of the abrasive material 3, Moreover, the cutting surface 4 is parallel to the grinding surface.

Generally, when polishing a blade, it is preferable to polish from the tip of the blade toward the main body. Therefore, at the same time as rotating the intermediate needle 1a, the abrasive material 13 is transferred from the surface 5 to the blade flat part 3.
(in the direction of arrow a in FIG. 5(b)). Then, as shown in FIG. 6(a), by pressing the ridge 8 of the flat part 3 of the blade against the abrasive material 13, this ridge 8 is ground to form the blade 41 surface 4, and at the same time, the blade is removed.
A cutting edge 6 is formed at the edge where the surfaces 4 and 5 intersect.

As mentioned above, the edge 8 is formed in a curved shape. For this reason,
As shown in Fig. 6 (al, (bl), the intermediate needle 1a is swung in the directions of arrows c and d, and the intermediate needle 1a is placed against the grinding surface.
It is possible to grind the entire length of the cutting surface 4 by continuously changing the angle of the edge 8 according to the curve of the edge 8 and by changing the contact position between the grinding surface and the edge 8. .

As described above, one edge 8 in the portion of the triangular portion B corresponding to the cutting edge A is ground to form the cutting surface 4. After forming the cutting edge 6, the other edge 8 is ground to form the cutting surface 4 and forming the cutting edge 6.

While separating the intermediate needle 1a from the abrasive material 13,
a is rotated about the axis according to the angle of the cutting surface 4 with respect to the flat surface portion 3 of the blade portion. That is, the intermediate needle 1a is
By rotating in the opposite direction at an angle twice the currently set angle, the other edge 8 faces the grinding surface of the abrasive material 13, and at this time, the cutting surface 4 formed on the edge 8 becomes parallel to the grinding surface (see Fig. 5(C)). and abrasive material 13
is run in the direction of the arrow, and the intermediate needle 1a is moved as shown in FIG. 6(a).
The abrasive material 1 is oscillated in the directions of arrows c and d shown in (b).
3, the other ridge 8 is ground to form a cutting surface 4, and a cutting edge 6 is formed at the edge where the surface 4 and surface 5 intersect (see FIG. 5(d)). .

As described above, the cutting edge part A in the triangular part B of the intermediate needle 1a
By sequentially grinding the edges 8 corresponding to
As shown in a) and (b), a cutting edge 6 is formed at a portion corresponding to the cutting edge portion A from the needle tip 2 of the straight intermediate needle 1a.

Next, the intermediate needle 1a forming the cutting edge 6 is subjected to a curving process to form a predetermined curved shape.

This curving process can be carried out using a curving apparatus 14 shown in FIG.

As shown in the figure, place the intermediate needle 1a on the eye 4b,
When the bending piece 14a is rotated in the direction of the arrow e, the belt 14b also moves in the same direction, and the intermediate needle 1a moves while being held between the bending piece 14a and the bell H4b. During the movement process, the intermediate needle la is pressed against the surface of the bending piece 14a by the belt 14b and is formed into a curve.

As mentioned above, depending on whether the blade flat part 3 of the straight intermediate needle 1a forming the cutting edge 6 shown in FIG. 7 is placed on the belt 14b side, or whether the flat part 3 is placed on the bending piece 14a side, The flat blade part 3 is located on the outer periphery or the inner periphery, and the first
As shown in the figure, it is possible to obtain a pentagonal needle l formed into a predetermined curved shape.

In the pentagonal needle 1 formed into a predetermined shape by going through each of the above steps, the surface of the cutting surface 4 of the cutting edge part A is
1 or the abrasive grain size of the abrasive material 13. Furthermore, there is a possibility that fine particles may be attached to the blade surface 4 and the blade flat portion 3.

Therefore, by pickling the pentagonal needle 1 which has been curved into a predetermined shape, the surface roughness of the cutting surface 4 is adjusted and the attached particles are removed. Then, the pentagonal needles 1 after pickling are individually inspected to produce pentagonal needles 1 of constant quality.

As described above, in the manufacturing method according to the present invention, when manufacturing the pentagonal needle 1, a straight intermediate needle 1a is formed, and the ridge 8 of the triangular portion B of the intermediate needle 1a is ground to form the cutting surface 4. Since the cutting edge 6 is formed at the same time as the ridge 8 is formed, it becomes possible to easily carry out the grinding work on the ridge 8.

In the above-described embodiment, the case where one intermediate needle 1a is gripped and ground by the vice 12 has been described, but by using the vice 15 shown in FIGS. 9(a) and (b), a plurality of intermediate needles can be ground simultaneously. It is possible to perform grinding on 1a.

In the figure, the vice 15 is composed of two gripping plates (15a) disposed above and below, and a gripping plate (H) 15a.
Urethane layers 15b each consisting of a urethane resin coating layer or a lining layer are formed on the opposing surfaces of 5a. Further, the gripping holes 5a are configured to be movable with respect to each other in the directions of arrows g and h, and are configured to be able to be pressed together, pressed against each other, and released by a clamp mechanism (not shown).

When gripping a plurality of intermediate needles 1a using the vice 15, first, the plurality of intermediate needles 1 are attached to the lower gripping plate 15a.
a are arranged in parallel with appropriate spacing, and the body of the intermediate needle 1a is placed on the urethane layer 15b. Next, the needle tips 2 of the intermediate needles 1a are positioned on the same line, and each intermediate needle 1
The intermediate needle 1a is clamped by setting the plane parts 3 of the blade part a to be on the same plane and operating the clamp mechanism to press the upper and lower gripping plates 15a to each other.

When rotating a plurality of intermediate needles 1a, the upper and lower grip plates 15a are brought into pressure contact with each other by operating the clamp mechanism and moved in the direction of arrow g or in the direction indicated by the arrow. The intermediate needle 1a is rotated by contact friction.

When rotating the intermediate needle 1a, since the angle at which the intermediate needle 1a should be rotated is set in advance, it is possible to uniquely set the amount of movement of the grip plate H5a in the directions of arrows g and h.

FIG. 10 is an explanatory view of the vice 15 configured to be swingably supported by the knife 1G.

In the figure, the knife 16 is a base plate 16a.
This hairspray 16a is configured to be movable back and forth in the direction of arrow i by a drive device 17. Further, the high speed steel 15 is supported by the knife 16 so as to be rotatable in the direction of the arrow j. A balance weight 15c is attached to the HSS 15 so as to be slidable in the longitudinal direction of the intermediate needle 1a, and by adjusting the position of the balance weight 15c, the abrasive material 13 of the intermediate needle 1a is removed.
The structure is configured such that the pressing force against can be adjusted.

When a plurality of intermediate needles 1a are held by a vise 15, supported by a knife knife 16, and given reciprocating linear motion in the direction of arrow i by a drive device 17, a constant pressing force acts on the intermediate needles 1a. The needle 1a is always in contact with the grinding surface of the abrasive material 13. Therefore, one end of the intermediate needle 1a is in contact with the abrasive material 13, and the other end is held by the high speed steel 15. Therefore, the high speed steel 15 performs a rotational movement in the direction of arrow J in accordance with the movement position of the knife 16.

The above-mentioned grinding can also be performed by a robot. That is, the intermediate needle 1a can be ground by having the high speed steel 15 gripped by the robot and making necessary movements.

As described above, it is possible to simultaneously perform the grinding operation on a plurality of intermediate needles 1a.

In the above-mentioned embodiment, when grinding the edge 8 of the triangular part B, the running direction of the abrasive material 13 was set from the cutting edge 6 side to the direction of the blade flat part 3. When manufacturing the suture needle disclosed in , the running direction of the abrasive material 13 is set from the blade flat portion 3 side to the cutting edge 6 direction.

<Effects of the Invention> As described in detail below, according to the method for manufacturing a pentagonal needle according to the present invention, a straight intermediate needle is formed in manufacturing the pentagonal needle, and the triangular portion of the intermediate needle is Since the edge of the blade is ground to form the cutting surface and the cutting edge is formed at the same time, the grinding work can be carried out without requiring a high degree of skill. Therefore, the grinding work becomes easy and can be mechanized. Therefore, manufacturing costs can be reduced.

In addition, since suture needles are manufactured by forming a cutting surface and a cutting edge on a straight intermediate needle and then applying a curved process, suturing needles in which the flat part of the blade part is formed on the curved inner periphery, which has recently become more common, Even needles can be manufactured easily and at low cost.

Further, since a planar abrasive material is used when performing the grinding work on the intermediate needles, it is possible to simultaneously bring a plurality of intermediate needles into contact with this grinding surface and perform grinding. Further, since the grinding surface is a flat surface, the grinding angle is uniquely set by the rotation angle of the intermediate needle with respect to the grinding surface, and is not influenced by the contact position of the intermediate needle with respect to the grinding surface. Therefore, it has features such as being able to reduce manufacturing costs and produce pentagonal needles of consistent quality.

[Brief explanation of drawings]

Figure 1 is a perspective view of the pentagonal needle, and Figure 2 is the same as in Figure 1.
-■ Cross-sectional view, Figure 3 (a) is a front explanatory view of the triangular needle that is the material of the pentagonal needle, Figure 3 (b) is a cross-sectional view of the triangular part in the same figure (al), Figure 4 ( a) and (b) are plan explanatory views showing the relationship between the running direction of the abrasive material and the triangular needle, and Fig. 5 (
a) to (d) are front explanatory views showing the relationship between the abrasive material and the triangular needle; FIGS. 6(a) and (+)l are side views showing the relationship between the abrasive material and the triangular needle; Figure 7 (a) is a front explanatory view of a triangular needle with a cutting surface formed, and Figure 7 (b) is the same figure (a).
8 is a schematic explanatory diagram of the bending device, FIG. 9(a) is an explanatory diagram of a high speed steel that grips a plurality of triangular needles, and FIG. 9 (bJ is the same figure (al) Fig. 1 (Fig. 1 is an explanatory diagram of a high speed steel that is configured to be swingable, and Figs. 11 to 14 are explanatory diagrams of conventional technology. A is a cutting edge portion, B is a triangular portion, and C is a thread attachment. part, D is the body part, 1
is a pentagonal needle, 1a is an intermediate needle, 2 is a needle tip, 3 is a flat part of the blade, 4 is a cutting surface, 5 is a surface, 6 is a cutting edge, 7 is a peak, 8 is an edge, 9 is a style, 10 1 is a through hole, 11 is a disc-shaped grindstone, lla is a side surface, 12 is a vise, 13 is a belt-shaped abrasive material, 14 is a bending device, 15 is a vise, 16 is a knife, 17
is the driving device. Patent applicant Matsutani Seisakusho Co., Ltd.

Claims (1)

[Claims] A manufacturing method for manufacturing a suture needle having a pentagonal cross section, which is curved into a predetermined shape while forming cutting surfaces on both sides of the flat part of the blade portion of the suture needle having a triangular cross section, the suture needle having a predetermined triangular pyramid shape. A straight needle formed in the shape of the abrasive material is arranged in a direction approximately perpendicular to the traveling direction of the planar abrasive material, and the cutting surface of the cutting surface of the abrasive material is arranged in a direction approximately perpendicular to the running direction of the planar abrasive material, and the cutting surface of the cutting surface of the abrasive material is arranged in a direction approximately perpendicular to the traveling direction of the planar abrasive material. A straight needle is rotated around the axis of the needle so that it is parallel to the grinding surface, and one side end of the flat part of the blade part is pressed against the flat abrasive material to grind the side end. A cutting surface is formed, and then the straight needle forming one cutting surface is aligned so that the cutting surface is parallel to the grinding surface of the abrasive material according to a preset angle of the cutting surface with respect to the flat surface of the blade. The needle is rotated around the axis so that the other side end of the flat part of the blade part is pressed against a flat abrasive material, and the other side end is ground to form the other cutting surface, resulting in a pentagonal cross section. 1. A method for producing a suture needle having a pentagonal cross section, comprising: forming a straight needle having a pentagonal cross section, and then performing a curving process on the straight needle to curve it into a predetermined shape.