JP5334608B2 - Medical suture needle grinding device - Google Patents

Description

  The present invention relates to a grinding apparatus for forming a needle tip or a needle tip and a cutting blade at one end of a medical suture needle.

  Many types of medical suturing needles such as shapes and sizes are provided depending on the site to be sutured. Among them, typical needles include a round needle and a square needle. The round needle has a sharp needle tip formed at the tip, and a tapered portion having a circular cross-sectional shape in which the cross-sectional area continuously increases from the needle tip. In addition, a sharp needle tip is formed at the tip of the square needle, and a tapered portion having a polygonal cross section is formed continuously from the needle tip.

  The cross-sectional shape from the needle tip of the suture needle to the tapered portion is formed by grinding with a grindstone or the like. This grinding process is performed by the operator manually operating a vise that holds the suture needle material.

  However, such manual grinding requires skill to perform the grinding process and causes variations in the formed suture needles. However, this variation occurs for each gripping unit by the vice even in the same lot.

  With respect to such a problem, in Patent Document 1 (Japanese Patent No. 2937383), a plurality of materials are linearly arranged in a line and gripped with a vise, and the vice is advanced and retracted in the front-rear direction and synchronized with advance and retreat. It is made to rotate and the taper part of a suture needle is ground.

  FIG. 5 is a perspective view of the suture needle. The suturing needle 1 shown in the figure relates to a suturing needle with a blade whose cross section is formed in a triangular shape. A sharp needle tip 1a is formed at the tip of the suture needle 1, and a sharp cutting edge 1b is formed continuously from the needle tip 1a over a predetermined length. Further, the ridge line 1d formed between the cutting edge 1b and the body portion 1c is formed as a mere ridge line without having a function as a cutting edge. A portion indicated by reference numeral 1e including the needle tip 1a and the cutting edge 1b is a portion formed by grinding processing or grinding processing and plastic processing such as pressing, and is called a grinding portion.

  The other end of the suture needle 1 is formed as an original end face 1f, and a blind hole 1g for coupling a suture thread (not shown) is formed on the original end face 1f. In this embodiment, the suture needle 1 is an eyeless needle. However, the present invention is not limited to this configuration, and an eyed needle having a through hole formed on the end surface on the original end surface 1f side may be used.

  Examples of the suture needle 1 include a suture needle having a diamond-shaped cross section, a suture needle having a trapezoidal cross section, and the like in addition to the above-described suture needle having a triangular cross section.

  As a material constituting the suture needle 1, an austenitic stainless steel wire formed by cold drawing and having a diameter substantially equal to the thickness of the suture needle 1 is used. This wire is given the required hardness as the suture needle 1 by work hardening by cold drawing, and the required hardness is given by the austenite structure extending into a fiber shape.

  The linear material is formed by cutting the wire with a length substantially equal to the length of the suture needle 1. Then, one end of the material is made to correspond to the needle tip 1a and the other end is made to correspond to the original end surface 1f, and the portion corresponding to the grinding portion 1e is ground on the needle tip 1a side, and the material is stopped on the original end surface 1f side. A hole 1g is formed. Any order may be sufficient as the process order of the grinding process with respect to a raw material, and the processing process of the blind hole 1g.

  FIG. 6 is a diagram showing a configuration of a conventional grinding device for a medical suture needle described in Patent Document 1. As shown in FIG. Details are described in Patent Document 1, but an outline will be described below. The grinding apparatus shown in FIG. 6 is an apparatus that holds and grinds a large number of materials A linearly in a row on a vise B and brings the grinding part 1e of the material A into contact with the rotating grindstone 2. The vise B is reciprocated in the left-right direction in the figure by the driving means C.

  The vise B has a lower receiving plate 3 and an upper receiving plate 4, and holds a large number of materials A in a straight line between them. A bearing portion 6 for rotatably supporting the upper receiving plate 4 is formed at an end portion of the lower receiving plate 3 on the rear side (right side in FIG. 6, the same applies hereinafter). The upper receiving plate 4 is configured to be rotatable with respect to the lower receiving plate 3 by fitting the shaft 7 formed at the end of the upper receiving plate 4 to the bearing portion 6.

  The material A is gripped or released by bringing the lower receiving plate 3 and the upper receiving plate 4 into contact with each other, and a clamp 8 is provided to make this contact. The cam lever 8a of the clamp 8 is rotated clockwise around the pin 8b, and when the cam lever 8a is at the solid line position shown in the figure, the upper receiving plate 4 is brought close to the lower receiving plate 3 to grip the material A. Further, the cam lever 8a is rotated counterclockwise, and when the cam lever 8a is at the two-dot chain line position, the upper receiving plate 4 is separated from the lower receiving plate 3 to release the gripping of the material A.

  The vise B can change the distance between the upper receiving plate 4 and the lower receiving plate 3 according to the thickness of the material A, and the elastic member 5 is provided at the tip so that the material A is firmly attached. It can be gripped.

  A block 10 is provided in the vise B, and a V-groove 10 a that opens downward is formed in the block 10. On the other hand, the guide member 12 that supports the vise B has a knife edge 11 at the center thereof, and the vise B is supported by the tip of the knife edge 11 entering the V groove 10a. Therefore, the vise B can be rotated in the direction of the arrow b or c around the tip of the knife edge 11.

  The knife edge 11 is fixed to a slide base 13, and the slide base 13 is movable in the left-right direction in the figure. That is, the guide member 12 has a groove 12a formed in the front-rear direction, and the slide base 13 is fitted in the groove 12a. One end of a rod 16 is rotatably connected to the slide base 13, and the other end of the rod 16 is rotatably connected to a block 15 b fitted in a groove 15 a of the rotating plate 15. The rotating plate 15 is rotated in the arrow direction by the motor 14. In the above configuration, the motor 14 and the rotating plate 15 constitute the driving means C.

  When the driving means C is configured using the rotating plate 15, it is preferable that the moving speed of the slide base 13 can be set to a constant value by using a pulse motor as the motor 14.

  When the motor 14 rotates and the rotating plate 15 rotates in the direction of the arrow, the slide base 13 reciprocates in the d and e directions by the rod 16, and the vice B also reciprocates in the d and e directions.

  The center of gravity of the vise B is between the knife edge 11 and the material A, and the rotary grindstone 2 is circular. Therefore, when the vise B reciprocates in the d and e directions, the vise B moves along the tip of the knife edge 11 accordingly. It will rotate in the b and c directions around the center.

  That is, when knife edge 11 moves in the direction of arrow e, vise B rotates in the direction of arrow b along with this movement, and when knife edge 11 moves in the direction of arrow d, vise B moves in the direction of arrow c along with this movement. To turn. Therefore, as the knife edge 11 moves, the vise B performs a combined motion of a straight motion and a rotational motion. For this reason, the material A gripped by the vice B is ground by the rotating grindstone 2 while changing the contact position with respect to the rotating grindstone 2.

  As described above, since the center of gravity of the vice B is between the knife edge 11 and the material A, when the material A gripped by the vice B is brought into contact with the rotating grindstone 2, the material A has a weight of the vice B. A pressure proportional to is applied. This applied pressure is calculated by determining the distance from the contact point of the material A and the rotating whetstone 2 to the center of gravity of the vise B, the distance from the contact point of the material A and the rotating whetstone 2 to the knife edge 11, and the weight of the vise B. Can be sought. Therefore, it is possible to set the load (pressing force) acting on the material A when grinding is set to an appropriate value.

  If the load does not reach a desired value, it can be set by applying an external load such as a spring load to the vise B.

  FIG. 7 is a diagram showing the relationship between the material A and the rotating grindstone 2 during grinding. The rotating grindstone 2 rotates in the direction of arrow a. The material A indicated by the solid line is a state in which the vice B has moved to the leftmost side in FIG. At this time, the original end face 1f side of the grinding portion 1e is ground. The material A is in contact with the top of the rotating grindstone 2, and at this time, the material A is in a substantially horizontal state. When the knife edge 11 moves to the right side in FIG. 6 and moves to the rightmost side, the material A moves to the position indicated by the imaginary line with respect to the rotating grindstone 2 and tilts so that the left side is lowered from the horizontal by an angle α1. To do. Thereby, the needle tip 1a is ground. In this way, one surface of the triangular cross section is ground, and the material A is rotated twice by 120 ° to grind the three surfaces of the triangular suture needle and sharply point the needle tip 1a as shown in FIG. Can do. Thereafter, the suture needle is curved.

Japanese Patent No. 2937383

  However, in the technique described in Patent Document 1 described above, the rotation angle of the vise B is small, and as shown in FIG. 8, the angle θ1 of the needle tip 1a is small and the needle tip portion is thinned to ensure the strength of the suture needle. There is a problem that it is not possible.

  The present invention is intended to solve this problem, and provides a medical suture needle grinding apparatus capable of manufacturing a medical suture needle having a sufficient strength by increasing the angle of the needle tip of the suture needle. The purpose is to do.

  The grinding device for a medical suturing needle according to the present invention that achieves the above object comprises a grinding means for grinding a material of the medical suturing needle, a vise for gripping a plurality of materials of the medical suturing needle, and the vice. First moving means for linearly approaching and separating the grinding means, and the vice and the grinding means are moved relatively in a direction perpendicular to the moving direction of the first moving means. A second moving unit; and a synchronizing unit that drives the first moving unit and the second moving unit synchronously, and the vice is configured to grind the material of a plurality of medical suturing needles held by the vice. It is characterized by grinding with pressure contact.

  The vise or the grinding means is configured to be relatively moved by the first moving means and / or the second moving means via a support member that rotatably supports them, or the first moving means moves. The moving direction is a horizontal direction and the moving direction of the second moving means is a vertical direction, or the synchronizing means has a rotating plate, and a rod and a second rod provided on the rotating plate The first moving unit and the second moving unit are driven, the first moving unit is configured to be able to change the distance for moving the vice and the grinding unit relative to each other, or the second moving unit. A means can be set as the structure which can change the distance which moves the said vice and a grinding means relatively.

  A plurality of materials are held in a row in a vise, and the plurality of materials are pressed against the grinding means. Thereby, a plurality of materials are ground. By moving the vice and the grinding means relatively closer or farther away with the first moving means, it is possible to grind the entire grinding part from the tips of a plurality of materials to a predetermined length. Since the vise or the grinding means is rotatably supported by the support means, the vice or the grinding means rotates when the vice and the grinding means come close to each other, and the material is ground by the grinding means. The angle at which it touches slightly changes. In addition to this, when the vice or the grinding means is moved in the orthogonal direction by the second moving means, the rotation angle of the vise becomes large, and the angle at which the material contacts the grinding means can be greatly changed. As a result, it is possible to obtain a suture needle having a desired strength by increasing the angle of the sharply pointed tip of the suture needle material and increasing the thickness of the tip of the suture needle.

It is a figure which shows typically the structure of the grinding device of the medical suture needle | hook of this invention. It is a figure in the state where the vice was most retracted from the rotating grindstone and the guide member was at the uppermost position. It is a figure which shows the relationship between the raw material in grinding by the grinding apparatus of this invention, and a rotary grindstone. It is an enlarged view which shows the grinding part of the suturing needle ground by the grinding apparatus for medical suturing needles of this invention. It is a perspective view of a suture needle. It is a figure which shows the structure of the grinding device of the conventional medical suture needle. It is a figure which shows the relationship between the raw material in grinding with the grinding apparatus of FIG. 6, and a rotary grindstone. It is an enlarged view which shows the grinding part of the suturing needle ground by the grinding device of the conventional medical suturing needle.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a diagram schematically showing a configuration of a grinding device for a medical suture needle according to the present invention. Since the most part is the same as the conventional medical suture needle grinding device of FIG. 6, the same components are denoted by the same reference numerals, description thereof will be omitted, and differences will be mainly described.

  In the medical suture needle grinding apparatus shown in FIG. 1, the slide base 13 is slidably provided on the guide member 12 as described above, and the knife edge 11 is integrated with the slide base 13. The slide base 13 is connected to the rotary plate 15 and the rod 16, and when the rotary plate 15 is rotated by the motor 14, the knife edge 11 linearly reciprocates in the d or e direction (horizontal direction). As a result, the vise B approaches or separates from the rotating grindstone 2 as a grinding means. In the above configuration, the knife edge 11 and the V groove 10a constitute the support means for the vise B. Further, the rod 16 and the slide base 13 constitute first moving means. The moving distance by the first moving means can be adjusted by moving the block 15b in the groove 15a.

  Further, in the medical suture needle grinding apparatus of the present invention, the guide member 12 has a protruding portion 12b on the right side of the figure, and a rotating plate 15 is fixed thereto. Although illustration is omitted, the motor 14 is also fixed to the protruding portion 12b.

  On the back side of the rotating plate 15, a second groove 15c is formed in a direction extending the groove 15a. A second block 15d is slidably provided in the second groove 15c, and is fixed at a predetermined position. One end of the second rod 17 is rotatably connected to the second block 15d, and the other end of the second rod 17 is rotatably connected to a pin 18b away from the rotation shaft 18a of the eccentric cam 18. Yes. The rotating shaft 18a of the eccentric cam 18 is fixed to a mounting seat 20a provided on the base 20 so as to be freely rotatable by a bearing. The bottom surface of the guide member 12 is in contact with the outer peripheral surface of the eccentric cam 18.

  The guide member 12 is supported by two guide columns 19, 19 provided apart from each other so that the guide member 12 can be moved up and down in a state where it is always kept horizontal. The guide pillars 19 and 19 are erected on the base 20. As a result, the knife edge 11, the rotating plate 15, and the motor 14 move up and down together with the guide member 12.

  When the rotating plate 15 is rotated in the arrow direction by the motor 14, the guide member 12 reciprocates in the direction d or e (horizontal direction). At the same time, the second rod 17 rotates the eccentric cam 18, and the eccentric cam 18 moves the guide member 12 up and down in the direction f or g (vertical direction). This direction is a direction orthogonal to the moving direction of the slide base 13 (the moving direction of the first moving means). In the above configuration, the second rod 17 and the eccentric cam 18 constitute second moving means. The amount of elevation by the second moving means can be adjusted by changing the amount of eccentricity of the eccentric cam 18. Specifically, eccentric cams of various eccentric amounts are prepared and replaced.

  The reciprocating movement of the guide member 12 in the left-right direction and the up-down movement in the up-down direction are synchronized. In this embodiment, a rotating plate 15 is used as the synchronizing means. When the guide member 12 moves to the rightmost side in FIG. 1 by the synchronization of the first moving means and the second moving means, the eccentric cam 18 lifts the guide member 12 to the uppermost position (direction f). Yes. Conversely, when the guide member 12 moves to the leftmost side in FIG. 1, the eccentric cam 18 lowers the guide member 12 to the lowest position (g direction).

  As a method for synchronizing the reciprocating movement of the guide member 12 in the left-right direction and the up-and-down movement, in the embodiment of FIG. It is not something. As long as synchronization can be obtained, the left and right reciprocating movements and the up and down movements may be performed by separate drive mechanisms.

  Similarly, the first moving means for reciprocating left and right using the rotating plate 15 and the rod 16 and the second moving means for moving up and down using the eccentric cam 18 and the second rod 17 are also limited to this configuration. However, a cylinder, a screw shaft, a linear actuator, or the like may be used.

  Further, the support means by the combination of the V groove 10a and the knife edge 11 is not limited to this, and can be changed to a combination of a shaft and a bearing.

  In this embodiment, the vice B is supported and moved by the support means. However, the present invention is not limited to this structure, and the grinding means can be supported and moved by the support means. is there. That is, if the position is relatively moved between the vice and the grinding means, it is included in the scope of the present invention.

  In this embodiment, the grinding wheel 2 has been described as the grinding means. However, the grinding tool is not limited to the grinding wheel, and belt-type grinding means such as a wrapping film can also be used. In particular, circular grindstones and lapping films with large diameters have a configuration in which the grinding surface is almost flat and it is difficult to form R or taper on the material, but it can be easily formed into a desired shape by using the apparatus of the present invention. This is advantageous because it can be ground.

Next, the grinding method according to the present invention will be described.
A plurality of materials A are sandwiched between the vices B, the cam lever 8a of the clamp 8 is tilted horizontally, and the materials A are clamped. A load acting on each material A is set in advance, and the rotating grindstone 2 is rotated to start grinding. When the rotating plate 15 is rotated by the driving means C, the knife edge 11 reciprocates in the directions of arrows d and e, and the guide member 12 moves up and down in the directions of f and g.

  As described above, since the center of gravity of the vice B is between the knife edge 11 and the tip of the vise B, the material A gripped by the vise B is always applied to the rotating grindstone 2 as a grinding means with a predetermined force. It is in pressure contact. If this pressure contact force is insufficient only by the weight of the vice B, the vice B may be urged toward the rotating grindstone 2 by an elastic body such as a spring.

  FIG. 2 is a view showing a state in which the vice B is most retracted from the rotary grindstone 2 and the guide member 12 is at the uppermost position. The tip of the vise B is lowered by its own weight, and the vise B is greatly inclined.

  FIG. 3 is a view showing the relationship between the material A and the rotating grindstone 2 being ground by the medical suture needle grinding apparatus of the present invention. The rotating grindstone 2 rotates in the direction of arrow a. The material A indicated by the solid line is a state in which the vice B has moved to the leftmost side in FIG. At this time, the most end surface 1f side of the grinding part 1e is ground. The material A is in contact with the top of the rotating grindstone 2, and at this time, the material A is in a substantially horizontal state. When the knife edge 11 moves to the rightmost side as shown in FIG. 2, the material A moves to the position indicated by the phantom line in FIG. 3 with respect to the rotating grindstone 2, and at this time, the left side is lowered from the horizontal by an angle α2. Tilt. The angle α2 is larger than the angle α1 shown in FIG. 7 because the guide member 12 is raised.

  FIG. 4 is an enlarged view showing a suture needle grinding portion 1e ground by the medical suture needle grinding apparatus of the present invention. In the medical suture needle grinding apparatus of the present invention, the support means is linearly approached and separated from the grinding means in the horizontal direction, and is moved up and down in the vertical direction to perform horizontal movement and vertical movement. Since they are synchronized, the angle θ2 of the needle tip 1a can be made larger than the conventional angle θ1 (FIG. 8), the thickness of the cutting blade 1b can be increased, and the strength of the medical suture needle can be increased. Can be made large enough.

  Grinding of the triangular suture needle is completed by grinding one surface of the suture needle having a triangular cross section in this way and rotating the material A by 120 ° to grind the other two surfaces. Then, if a curve is given and a blind hole is drilled in the base end or a through hole is formed, the triangular suture needle is completed.

DESCRIPTION OF SYMBOLS 1 Sewing needle 1a Needle point 1b Cutting edge 1e Grinding part 2 Rotary grindstone (grinding means)
8 Clamp 10a V groove (support means)
11 Knife edge (support means)
12 Guide member 13 Slide base (first moving means)
14 Motor 15 Rotating plate (Synchronizing means)
16 Rod (first moving means)
17 Second rod (second moving means)
18 Eccentric cam (second moving means)
A Material B Vise C Drive means

Claims (5)

Grinding means for grinding the material of the medical suturing needle, a vise for gripping a plurality of materials of the medical suturing needle, support means for rotatably supporting the vise , the support means and the grinding First moving means for moving the means relatively linearly, and second movement for moving the vice and the grinding means relatively in a direction perpendicular to the moving direction of the first moving means. And a synchronizing means for driving the first moving means and the second moving means synchronously, and the vice includes a moving direction of the first moving means and a moving direction of the second moving means. A device for grinding a medical suturing needle, wherein the grinding device rotates in a plane formed by pressing the material of a plurality of medical suturing needles to be held in pressure contact with the grinding means. The direction in which the first moving means moves the support means is a horizontal direction, the direction in which the second moving means moves the support means is a vertical direction, and the rotation of the vise is in a vertical plane. The medical suture needle grinding apparatus according to claim 1 . The synchronizing means has a rotating plate, and the rotating plate has a rod and a second rod that are spaced apart from the rotating plate, and the first moving means is driven by the rod , grinding device of the medical suturing needle according to claim 1 or 2, wherein the second moving hand stage is characterized in that it is driven by a second rod. The medical suture needle grinding apparatus according to any one of claims 1 to 3 , wherein the first moving means is capable of changing a distance for relatively moving the vise and the grinding means. The medical suturing needle grinding apparatus according to any one of claims 1 to 4 , wherein the second moving means is capable of changing a distance for relatively moving the vise and the grinding means.

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