JP2002192449A - Grinding device for medical suture needle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinding device that manufactures an appreciably safe medical suture needle with which an operator is unlikely to injure him/herself even under a wrong operation. SOLUTION: The grinding device 20 has a grinding body 21 for grinding a surface of a blade perpendicularly to the length thereof, and a frame 22 for holding a plurality of medical suture needles. The frame 22 has in the top surface a plurality of grooves for holding a lower portion of the medical suture needles below the ground surface, and the top surface of the frame 22 is continuously flush with the resultant ground surface of the medical suture needles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding apparatus for manufacturing a suture needle having a triangular cross section or the like.

[0002]

2. Description of the Related Art Conventional medical suture needles are disclosed in
Japanese Unexamined Patent Application Publication No. 2-23457 and Japanese Patent Publication No. 1-54075. Each of these medical needles has a triangular cross section, and its blade is sharpened in order to reduce the penetration resistance when the suture needle penetrates a living tissue.

[0003]

However, in recent years, the problem of infection among patients and patients with infectious diseases such as hepatitis, AIDS and MRSA has become a major social problem. When a person accidentally injures himself or herself with a device, it may be performed using a body fluid such as blood as a medium. Therefore, a suture needle having a sharp tip may cause injury to the patient, and in such a case, the risk of infection between the two becomes extremely large. It had to be paid, and the mental burden was enormous.

Accordingly, the present invention is to solve the above-mentioned problem that has occurred in response to the recent medical situation, and is intended to provide a safety device that prevents a caregiver from harming himself even if he / she operates the suture needle incorrectly. It is an object of the present invention to configure a grinding device for producing a medical suture needle excellent in quality.

[0005]

In order to solve the above-mentioned problems, a grinding apparatus according to the present invention comprises: a grinding body for grinding a surface on which a blade is applied in a direction transverse to a length direction of the blade; And a gantry for holding the medical suturing needle, the gantry having a plurality of grooves on an upper surface thereof for holding a lower side of a ground surface of the medical suturing needle, and an upper surface of the gantry having the medical suturing needle. It is continuous on the same surface as the grinding surface of the needle.

A plurality of suture needles are arranged in a plurality of grooves formed on an upper surface of a gantry by using a grinding device that holds the lower side of the ground surface of the staple in the grooves of the gantry. Are arranged in parallel with the grooves on the upper surface of the gantry, and are simultaneously ground in the lateral direction. At this time, the grinding body and the upper surface of the gantry do not interfere with each other, and since the groove of the gantry holds the lower portion of the polished surface of the suture needle, no extra stress is applied to the suture needle during grinding.

[0007]

Next, an example of a medical suture needle manufactured by a grinding device according to the present invention will be described with reference to the drawings. FIGS. 1 to 4 relate to a suturing needle. FIG. 1 is a perspective view of the medical suturing needle, and FIG. 2 is a perspective view of a blade formed at the tip of the medical suturing needle.

As shown in FIG. 1, a medical suturing needle 1 is a curved suturing needle having a triangular cross section, and has a blade body 2 at a distal end and a connecting hole 3 for connecting a suture to an original end. Has formed. The blade body 2 has three surfaces 4A, 4B, 4C and three ridge lines 5A, 5 formed by intersections of these surfaces.
B, 5C.

[0009] Of the three surfaces, the first surface 4A, which is the outer surface of the curve of the suture needle 1, is a ground surface that has been laterally ground with a polishing disk or the like, and the other second and third surfaces. Surface 4B,
4C is a press surface formed by pressing a mold. Further, of the three ridge lines, the first ridge line 5A inside the curve of the suture needle 1 has a dull ridge, and the second and third ridge lines 5B and 5C on both sides of the first surface 4A. Has a sharp edge.

The blade body 2 has the cross-sectional shape shown in FIG. 2 and continues to the tip P of the blade body. The first ridgeline 5A has a shape in which the upper end is crushed and flattened, and the ridgeline 5A reaches the tip P while keeping the flat upper end. On the other hand, the first surface 4
A is a continuous surface approaching the first ridgeline 5A side as it approaches the tip P, and a spatular tip P is formed.

On the other hand, the second and third ridge lines 5B and 5C are
The ridges 5B and 5C do not intersect with each other at the tip P of the spatula, but no sharp point is generated. That is, when the suture needle 1 is pushed up against a living tissue such as the skin, the tip P of the blade body always comes into linear or planar contact with the living tissue, and a predetermined force is applied. Only if it enters living tissue. Then, once entering the living tissue, the sharp edges of the second and third ridges 5B and 5C cut open the tissue to reduce the piercing resistance, and the user can handle the suture needle 1 smoothly. it can.

Next, a method of manufacturing the blade body 2 will be described with reference to FIGS. FIG. 3 is an explanatory view of a procedure for forming a blade body,
FIG. 4 is a side view of the grinding device. A curved suturing needle as shown in the present embodiment is usually formed by processing a blade body into a linear material and then bending the same to obtain the same shape.

First, as shown in FIG. 3A, a material 1a such as stainless steel is fixed to a mold 10 having a V-shaped groove 11 and pressed from above. By this operation, the material 1a, which was initially cylindrical, is transferred to the shape of the V-shaped groove 11 and becomes triangular. The V-shaped groove 11 is constituted by groove side surfaces 11b and 11c and a bottom surface 11a.
Suture needle 1 whose surface pressed against 11c is a press surface
And the second and third surfaces 4B and 4C. V-shaped groove 1
The first bottom surface 11a flattens the first ridgeline 1A formed between the second and third surfaces 4B and 4C. When the material 1a is pressed from the upper surface, if the volume of the inserted material 1a is large, projections 7, 7 protruding from the pressing surface are formed at both ends of the upper surface of the material 1a.

In the method of manufacturing a suture needle according to the present embodiment, the material 1a is formed in a triangular prism shape by the press working shown in FIG. 3 (a). It may be pressed into a triangular pyramid shape using a mold, and shaped into a blade having a predetermined triangular cross section in a subsequent grinding step.

Next, the processing shifts to the processing step shown in FIG.
A grinding surface 4A is formed on the opposite surface of the ridge line 5A. This processing is performed by the grinding device 20 shown in FIG. As shown in FIG. 1A, the grinding device 20 includes a grinding disk 21 having a rotating side surface serving as a grinding surface 21a, and a gantry 22 for fixing a plurality of materials 1a in a clamp manner. FIG. 3 (b) shows a part thereof, and the grinding surface 21a of the grinding disk 21 has a profile whose side surface forms part of an ellipse.

FIG. 4B is a perspective view of the gantry 22. A plurality of parallel V-shaped grooves 2 are provided on the upper surface 22b of the gantry body 22a.
3 is cut, and the triangular prism-shaped raw material 1a processed in the step of FIG. These materials 1a
Is clamped and fixed between the fixing plate 22c and the gantry body 22a using the clamp lever 22d.

The upper surface 22b of the gantry body 22a has a gentle slope so that the side surface shape matches the side surface shape of the grinding surface 21a of the grinding disk 21. Therefore, even when the processing operation is performed using the grinding disk 21, the ground surface 21 a does not interfere with the upper surface 22 a of the gantry 22. In addition, since the lower side of the ground portion of the raw material 1a is held in the V-shaped groove 23, the raw material 1a is not subjected to excessive stress during the grinding process, and a high-quality suture needle can be formed. .

As described above, the grinding surface 21a of the rotating grinding disk 21 comes into contact with the tip of the material 1a, and forms the first surface 4A as a grinding surface on the material 1a. FIG. 3 (b) shows a state during grinding. A ground surface having a gently curved side surface is formed on the raw material 1a. As the grinding progresses, the protruding portions 7, 7 are scraped off. , Sharp edges are formed. This grinding operation is performed by reciprocating the grinding disk 21 a plurality of times. Since the grinding disk 21 is always ground in the lateral direction with respect to the length direction of the material 1a, the first surface 4A is a horizontal grinding surface. And an edge having excellent cutting properties is formed.

When the above-mentioned grinding is completed, FIG.
The material 1a having the blade body 2 as shown in FIG. That is, the first ridgeline 5A whose upper surface is flat and the ground first ridgeline 5A are formed.
Surface 4A approaches the tip P of the blade body 2 to form a flat plate. The thickness of the end face of the tip P can be variously set by adjusting the amount of descending of the grinding disk, and of course, 0, that is, the end face can be formed as a line. Also,
Second and third ridge lines 5B and 5C are formed on both side edges of the ground first surface 4A, and sharp edges are formed here. On the other hand, such lateral grinding is performed in the longitudinal direction with respect to the edge of the blade body tip P, and the tip P that is hard to cut is formed.

Thereafter, the raw material 1a is formed into a medical suturing needle 1 shown in FIG. As described above, the suturing needle 1 can easily form the above-mentioned shape characteristics only by performing the pressing and the grinding, and is excellent in productivity.

Although the suturing needle 1 is configured such that the first ridgeline 5A is inside the curve, it may be structured such that the first ridgeline is outside. In addition, the suture needle 1
It has a connecting hole 3 opened on the side of the needle as a structure for attaching a suture. Instead, a long hole opened by a drill or the like in the length direction of the needle main body is opened on the original end face of the needle, so that it can be used as an eyeless needle. Good. Furthermore, although this example has been described as a curved needle,
It goes without saying that the shape of the blade body 2 described above can be formed as a straight needle or a curved needle.

Next, various blade shapes will be described with reference to FIGS. 5 and 6. FIG. FIG. 5 is a perspective view of various blade shapes, and FIG. 6 is a cross-sectional side view of various dies used for press working.

FIG. 5A shows the blade body 2 of the above example, which has a rounded tip and an oval knife shape. Since the first ridgeline 5A is flattened at the upper end, the end becomes flat as a result of grinding. Also, blade 2 in FIG.
B is a sharp ridge of the first ridgeline 5A,
Accordingly, the shape of the blade tip P becomes sharp.

The blade body 2C shown in FIG.
The blades 2A and 2B of (b) are further ground so that the edges of the second and third ridgelines 5B and 5C are not continuous to the blade tip P, and the tip P is rounded. It is slowing down. The blade 2D shown in FIG.
Are formed by distorting the surfaces 4B and 4C.

Further, the blade body 2E of FIG. 5E has a square cross section, unlike the blade bodies 2A to 2D having a triangular cross section. In this case, the ridge lines are first to fourth ridge lines 15A to 15A.
Although it is formed up to 15D, a sharp edge may be formed at least on the third and fourth ridgelines 15C and 15D.
First surface 14A and corresponding second surface 14B on the back side
Approach each other as they approach the tip P, and the tip becomes a flat plate. Although the blade body 2E has a planar end surface at the tip P, the end surface is made linear as in the blade body 2F in FIG. You can also.

The various blades 2A to 2F described above can be easily formed by changing the mold used in the press working step. 6A to 6C show examples of the shape of the mold. That is, the blade 2B shown in FIG. 6B can be formed by using the mold shown in FIG. 6A. This mold has no bottom surface in the V-shaped groove 31 unlike the mold shown in FIG. 3A of the above-described example, and the material 1a formed by this mold has a sharper first mold.
5A. At this time, the V-shaped groove 31 has a sharpened lower end, but due to the nature of press working, this sharpened shape is not transferred to the material 1a, and the first ridgeline 5A has a dull shape. By adjusting the capacity of the mold, it is possible to prevent the material of the blade body 2B from protruding from the pressed surface as shown in FIG.

The blade body 2D shown in FIG. 5D is the same as the mold 4 shown in FIG.
It is processed with 1. By using such a mold 41, the second and third surfaces 5B and 5C having valley lines can be easily formed. Further, the blades 2E and 2F of FIG. 5E or 5F can be formed by using the groove 51 having a square cross section of FIG. 6C.

The penetration resistance of the suture needle 1 into the living tissue is determined by the contact area of the tip P with the living tissue when the tip P protrudes, and the shape is variously changed as shown in FIG. This can be adjusted if necessary. That is,
The tip P only needs to be shaped to disperse the pressure of the suture needle,
Since the skin has elasticity, the end face of the blade body may be linear or planar as long as no sharp point occurs.

As described above, by making the press shape of the material 1a various by using various dies, it is possible to make various cutting ends P without changing other processing steps such as a grinding step. Can be formed. Therefore, by using such a manufacturing method, the tip of the safe suture needle according to the present invention can be easily formed into various shapes according to the purpose of use of the suture needle.

[0030]

According to the present invention, a suturing needle is disposed in a plurality of grooves formed on the upper surface of a gantry, and a groove of the gantry uses a grinding device that holds a lower side of a grinding surface of the suturing needle. Not only allows multiple suture needles to be simultaneously ground in the lateral direction, but also ensures that the grooves of the gantry hold the lower side of the ground surface during grinding, so that extra stress is not applied to the suture needles and quality It is possible to provide an excellent medical suture needle.

[Brief description of the drawings]

FIG. 1 is a perspective view of a medical suture needle according to an embodiment of the present invention.

FIG. 2 is a perspective view of a blade body of the medical suture needle.

FIG. 3 is an explanatory view showing a method for manufacturing a medical suture needle.

FIG. 4 is an explanatory diagram of a grinding device used for grinding.

FIG. 5 is an explanatory view showing an example of the distal end shape of the medical suture needle according to the present invention.

FIG. 6 is an explanatory view showing various molds used in a press working step.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Medical suture needle 2 ... Blade body 4A-4C ... Surface 5A-5D ... Ridge line P is blade tip 20 ... Grinding device 21 ... Grinding disk (grinding body) 22 ... Stands

Continuation of the front page (72) Inventor Akira Saito 743 Nakanakatsu, Takanezawa-cho, Shioya-gun, Tochigi Prefecture F-term (reference) 3C049 AA02 AB04 CA01 CB04 4C060 BB11 BB30

Claims (1)

[Claims] 1. A grinding device for grinding a surface of a medical suture needle having a polygonal cross-section, the surface of which is obliquely cut with respect to the longitudinal direction of the blade, wherein the surface has a length equal to the length of the blade. A grinding body for grinding in a direction transverse to a direction, and a gantry for holding a plurality of the medical suturing needles, the gantry holding a lower side of a grinding surface of the medical suturing needle on an upper surface thereof. Wherein the upper surface of the pedestal is continuous with the grinding result surface of the medical suture needle.