JP2005349461A - Method for press-forming changing edge in scalpel for operation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press-forming method by which a changing edge in a scalpel for operation having thicker edge end part than a main body part can easily be formed by using a comparatively small type pressing machine. <P>SOLUTION: The end part of a sheet material for forming is pressed from the parallel direction with the sheet material for forming to increase the thickness so as to form this end part as the edge end part. To be concrete, the sheet material for forming is adjusted to the outer shape under a state of adjoining the backs of two pieces of the changing edges in the scalpel for operation, and the center portion of the sheet material for forming is pressed in the thickness direction, and both end parts of the sheet material for forming are pressed as parallel with the sheet material to increase the thickness of both end parts. The end part increasing the thickness is punched out into two pieces of the changing edges in the scalpel for operation from the sheet material for forming so as to become the respective edge end parts, and each end part is ground and pressed, etc., to form the edge end part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a simple press-molding method for a surgical replacement knife knife in which a blade edge portion is formed thicker than a main body portion.

  Some types of surgical scalpels have a replaceable cutting edge. FIG. 4 shows an example of a surgical replacement knife which is detachably attached to the tip of a knife handle (not shown). The surgical replacement knife knife 30 is generally formed by punching from a stainless steel plate or the like. However, as shown in the sectional view of FIG. 5, a blade having a base portion of the blade tip portion 32 thicker than the main body portion 34 is easier to use. It is known.

  Thus, the surgical replacement knife knife 30 in which the blade edge portion 32 is thicker than the main body portion 34 presses a central portion 37 of stainless steel having a thickness equal to or greater than the thickest portion of the blade edge portion 32 as shown in FIG. 15, or as shown in FIG. 8, both the outer sides of the end portion 38 are further pressurized by the press 16 to build up the thickness, and the portion to be the blade tip portion 32 is formed thicker than the main body portion 34. It was.

  In addition, an invention is known in which a hole is provided in the blade of a surgical knife to improve the sharpness.

JP 2000-325335 A

  However, in order to thin the central portion 37 that becomes the main body portion 34 by press working, even a small surgical knife with a small operation applies a pressure of 9.8 × 10 9 Pa, so a large size is required for processing. It required a press machine and a lot of energy.

  An object of this invention is to provide the press molding method which can shape | mold easily the replacement blade knife for surgery which made the blade edge | part thickness thicker than the main-body part using a comparatively small press processing machine.

  In order to solve the above-mentioned problems, the present invention increases the thickness by pressing the end portion of the molding plate material from the direction parallel to the molding plate material, and forms the end portion at the blade edge portion.

  Specifically, the outer shape of the forming plate is first formed in a state in which the backs of two surgical knife blades are adjacent to each other. And after pressing the part used as the main-body part of the replacement knife knife for surgery from the front and back, the both ends of a shaping | molding board are pressed from the direction parallel to a shaping | molding board, and the thickness of both ends is increased.

  Two surgical blades for surgery are punched from the molding plate material, and the end portions whose thickness is increased are processed by grinding, pressing, or the like so as to be the respective blade edge portions, and formed on the blade edge portions. Alternatively, two surgical knife blades may be punched from the forming plate after the end portion is formed on the cutting edge portion.

  Instead of molding the two surgical blades at a time, the surgical blades may be formed individually by such a pressing method.

  According to the press molding method according to the present invention, the thickness of the end portion of the molding plate can be made thicker than the central portion, that is, the main body portion with a small pressing pressure. Therefore, a surgical blade having a sharp cutting edge with a thicker blade edge than the main body can be easily formed with a small press without using a large press.

  Since the end of the molding plate is pressed thickly by pressing from both ends of the molding plate, the force in the pressing direction is canceled and the press can be efficiently processed. By pressing the central portion of the forming plate, the end can be thickened without increasing the thickness of the main body.

  The press molding method of the surgical replacement knife knife of the present invention will be described.

  FIG. 4 shows a surgical replacement knife knife 30 (hereinafter referred to as knife 30). The scalpel 30 has a mounting hole 36 for mounting on a scalpel handle (not shown) in the main body 34, and has a cutting edge 32 on the outside of the main body 34, and further, as shown in FIG. The base of the cutting edge portion 32 is formed thicker than the main body portion 34.

  FIG. 6 shows a forming plate 1 (hereinafter referred to as plate 1) for punching and forming the knife 30. The plate 1 has a thickness substantially the same as the thickness of the main body 34, and as shown by a two-dot chain line, the two scalpels 30 from the plate 1 have the spine 35 next to each other, and the cutting edge 32 is located on both sides Punched in the state of facing.

  The plate 1 is first formed by punching into a shape as shown in FIG. 6 (actually large as it is pressed). Next, as shown in FIG. 1, the central portion 3 of the plate material 1, that is, the portion that becomes the main body portion 34 is pressed from the front and back by the piston 12. The piston 12 is pressed so that the thickness of the central portion 3 does not change.

  When the piston 12 is pressed, as shown in FIG. 1, both ends 4, that is, the portion that becomes the blade tip 32 is pressed by the press 10 from the direction parallel to the plate material 1, and both ends 4 are shown in FIG. As shown, it is formed thicker than the central portion 3.

  When the thickness of the end portion 4 is increased, the plate 1 is punched out with a press (not shown) as shown by a two-dot chain line in FIG. A knife base material punched from the plate material 1 is ground at the end portion 14 or pressed as shown in FIG.

  Accordingly, the both ends 4 of the plate 1 can be thickened by using a relatively small press 10, and the surgical knife 30 with good sharpness in which the blade edge portion 32 is thicker than the main body portion 34 can be easily and few. Can be molded with energy consumption.

  Alternatively, both end portions 4 may be formed on the blade edge portion 32 before punching the plate material 1, and then the plate material 1 may be punched and divided into two scalpels 30.

  In the present invention, the two scalpels 30 may not be punched at the same time, but one end of the molding plate material may be pressed to increase the thickness, and one scalpel may be molded from the plate material.

  The present invention is not limited to the surgical blade having the shape shown in the drawings, and may be used for forming other members instead of the surgical blade.

It is a partial cross section figure which shows the metal mold | die used for the press method of this invention. It is a partial cross section figure which shows the metal mold | die used for the press method of this invention. It is a partial cross section figure which shows the metal mold | die used for the press method of this invention. It is a figure which shows one Embodiment of the replacement knife knife for surgery of this invention. It is the sectional view on the AA line of the surgical blade knife of FIG. It is a figure which shows the shaping | molding board | plate material for punching concerning this invention. It is a partial cross section figure which shows the conventional press method. It is a partial cross section figure which shows the conventional press method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Molding board material 3 Center part 4 End part 10 Press machine 12 Press machine 30 Surgical blade knife 32 Cutting edge part 34 Main body part 35 Back 36 Hole

Claims (4)

A press molding method for molding a member having a peripheral plate thickness thicker than that of other portions, wherein the end surface of the workpiece is pressed from a direction parallel to the surface of the workpiece, and the peripheral plate thickness is increased. A press molding method characterized by In the surgical replacement blade knife in which the blade tip provided outside the main body is formed thicker than the main body,
A method for press-forming a surgical spare blade knife, characterized in that an end of a forming plate is pressed from a direction parallel to the forming plate to a predetermined thickness, and the end is formed on the cutting edge. In the surgical replacement blade knife in which the blade tip provided outside the main body is formed thicker than the main body,
Both ends of the molding plate are pressed from the direction parallel to the molding plate to a predetermined thickness, two surgical knife blades are punched from the molding plate, and both ends are molded into the cutting edge. A press-forming method for a surgical replacement knife knife, characterized in that: 4. The press molding method for a surgical knife blade according to claim 3, wherein both end portions of the molding plate are pressed in a state where the center portion of the molding plate is pressed from the front and back.

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