JPS62241676A - Instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to medical instruments such as tweezers for clamping articles, and tableware such as forks.

[Conventional technology]

Tweezers used as conventional medical instruments are shown in Figure 1 (
As shown in the front view in a) and the side view in (b), the plate material is selected according to the material and shape of the article to be held.
Clamping members 1 and 2 are prepared which are processed into complicated shapes corresponding to the shapes of the articles to be clamped.

The clamping elements 1.2 are made opposite to each other,
When the two are combined, the proximal end 3 is fixed by welding, riveting, etc. with a wedge-shaped gap, and the distal end is curved in opposite directions so as to open, as shown in FIG. In the figure, the clamping member 1.2 is processed so that it becomes uniformly thin toward the distal end 4, but although it is not actually shown, the proximal end 3 is thin, the middle is thick, and the distal end is thin. 4
It has a complex shape in which it becomes thinner again, has just the right amount of elasticity to open and close by pushing it with your fingers, and the tip has been very carefully designed to make it easy to hold items, and it is also hardened. It is finished with heat treatment.

[Problems to be Solved by the Invention] As described above, since the tweezers work by holding an object in place, the quality of the tweezers immediately affects the work efficiency. Therefore, in many cases, the finishing work is done manually by skilled workers, which results in poor work efficiency.Furthermore, due to the shape, material, and clamping pressure of the product, products with complex shapes based on computer output designs are made in the winter. The reality is that this is not possible. In addition, because finishing work must be performed after rough machining from the plate material and heat treatment such as hardening, there is a natural limit to finishing the areas where hardness has increased due to hardening. It is difficult to form materials with hardness or by joining them together, and the tips 4 of a pair of welded clamping members are often misaligned, making it difficult to make them always match. It was a time-consuming task. Since the proximal end 3 where the pair of clamping members 1.2 are welded has a narrow wedge-shaped space, dirt accumulates there, such as a file, tweezers, etc., which are used to handle items that do not want to be contaminated with impurities because they are difficult to remove. It was extremely difficult to make medical equipment and food utensils.

The present invention provides a wedge-shaped tool without gaps, which can be used to produce a large number of tools at the same time, without the above-mentioned drawbacks.

[Means for solving problems]

The present invention uses wire-cut electrical discharge machining to make medical instruments such as tweezers, and uses a wire-cut electric discharge machining method to create a clamping part having an arbitrary shape and arbitrary thickness from a single base material to a common base end in a single stroke. It is designed to be processed and formed continuously. The shape of the clamping part is rounded with no narrow wedge-shaped gap at the base end, and the pair of clamping parts are of the same shape and are formed symmetrically, and one clamping part is thick to prevent it from moving. In this case, only the other gripping part can be formed into a thin comb so that it is movable and can be used to grip an article, or the left and right sides can be shaped differently depending on the size of the fingers of the hand. On the other hand, the base material can be heat-treated in advance, and the tip that will hold the object is made of Hastelloy (trade name), a heat-resistant and corrosion-resistant alloy mainly composed of nickel.
HSS, WC, Ti, Re, AJTi V, Fe
A plurality of tweezers can also be formed by continuous processing from an alloy such as Cr Co or Fe Ni Or, or a base material in which these alloys are bonded together. To process and form them, first, the side parts having a common shape are machined in the X direction all at once using wire-cut electrical discharge machining, and then the Y direction of the clamped part is machined and formed for each tweezers according to their respective shapes. and separate. At that time, a portion may be connected and separated after R, or may be separated during use and used as tweezers.

However, what can be formed by such a processing method is not only medical instruments such as tweezers, but also tableware and tools such as pliers, scissors, chucks, and forks.

(Function) Since the base material is heat-treated or a base material made of a combination of different materials is processed and formed in a single stroke pattern, the shape of the pair of clamping parts can be processed and formed to match exactly.
It is possible to create defective products where the tips of a pair of clamping parts, which have been formed separately by pressing, forging, or a contour machine, are welded together at their base ends and do not match, as in the past. In addition, the device of the present invention can be provided with a combination of different materials at the distal end, and the shape of the proximal end can be made rounder by eliminating the wedge-shaped gaps that occur when welding conventionally. The ability to completely clean and disinfect parts is extremely advantageous for medical instruments that must not be contaminated, tableware such as forks, and the like. According to this processing method, when making tools such as pliers, scissors, chucks, etc., there is no need to bend a pair of clamping parts and assemble them as in the conventional method, and all the work is done by wire-cut electrical discharge machining of the base material after heat treatment. By combining things, it has become possible to create extremely precise products.

〔Example〕

The present invention will be explained based on the drawings that illustrate the invention. Figure 2 (d
), the side surfaces of the clamping parts 1 and 2 are machined in the X direction using a wire-cut electrical discharge machine in a single stroke from the base material 5 shown by the chain line.

At this time, a hollowed out portion 6 may be provided to make the tweezers lighter and have appropriate elasticity. Next, as shown in the same figure (C), the proximal end 3 is rounded to facilitate disinfection and cleaning, and the distal end 4 has a space 7 formed thickly to prevent bending, which is also wire-cut. Perform machining in the Y direction using the electrical discharge machining line. To carry out this process, prepare a base material 5 that is large enough to accommodate the wire electrode 21 as shown in Fig. 5, and then attach multiple tweezers to the base material 5 in the It is extremely efficient if the Y-direction is processed individually. At this time, as shown in FIG. 6, the tweezers can be easily organized and stored if they are connected at the connecting part 8 and then separated at the end, or if they are broken off when used.

As shown in FIG. 5, the base material 5 is made of other materials such as Hastelloy, HSS, WC, Ti, Re, ANOTiV.
, Fe Cr Co , Fe Ni Cr , etc., if a combination of different cable materials 9 is used, as shown in FIGS. Tweezers having material 9 are produced.

The tip portion 4 can also be made of a permanent magnet material or a magnetic material and can be magnetized.

In the example shown in Fig. 4, the clamping part 1 is made thick so as to have rigidity so that it does not move, and only the clamping part 2 is thinly combed and has elasticity so that it can move. Place the tip of No. 1 on the item to prevent it from moving,
The tip of the clamping part 2 can be moved to clamp it. Furthermore, the holding portions 1.2 can be formed into different shapes on the left and right sides depending on the size of the fingers of the hand and the like. In the clamping tool shown in FIG. 7, the handle 10 and handle 11 are processed and formed separately, and the bottle 12 is caulked so that it can be opened and closed.
Providing a notch 15 so that the rings 4 and 4 match, and a ring 16
．． Pattern 10 so that 17 matches. Although not shown in the drawings, it can be made into a curved structure by heat-treating the base material and then processing it by wire-cut electric discharge machining or die-sinking electric discharge machining, so that it can be finished with extreme precision. The tableware 18 shown in FIG. 8 can be formed into any shape by rounding the grooved base 20 of the fork 19 from a single base material, and when processing in the Y direction, The diameter of the wire electrode 21, for example 0.2 mm
If it is +, it will be approximately 0.27 to 0.31 including processing enlargement allowance.
It can be produced in close contact with an interval of 11111.

〔Effect of the invention〕

According to the present invention, a medical instrument such as tweezers is heated in advance on one base material or on a single base material made of a combination of different materials, and then it is applied to a single base material or a base material made of a combination of different materials. Since it is machined, the proximal end can be rounded and cleaned and disinfected perfectly, and unlike welded parts, the holding part can be machined and formed to fit perfectly. Moreover, since the gripping part has a pear-finished surface created by electrical discharge, there is no need to provide uneven lines like in conventional tweezers, and even if the gripping part has a shape that does not allow uneven lines to be provided. It is possible to hold an object without it slipping. Furthermore, all tableware such as forks can be constructed from a continuous surface consisting of a rounded curved surface and a flat surface. Not limited to such instruments, industrial products such as pliers, scissors, chucks, etc. can be manufactured using any high-hardness material, corrosion-resistant material, or vibration-resistant material as a base material, and ±10μ100 from this one base material.
Since the molding process can be performed continuously with high precision and at intervals equal to the interval between the wire electrodes plus the processing expansion allowance, production can be carried out without waste.

Furthermore, when wire-cut electric discharge machining is used, no mold is required for molding, so it can be produced at a low cost.

It should be noted that, in the processing and forming in the present invention, it is preferable that as many of the processing and forming parts as possible be performed by wire-cut electrical discharge machining, and if necessary, by electrical discharge machining using a ram-type electrical discharge machine. Cornering and polishing of the outer periphery can be done by various machining, electrolytic machining, or chemical machining, and the clamping surface of the tip part 4 can be wire-cut into a line, a knife, or an edge shape depending on the purpose of use. It goes without saying that finishing polishing may be performed by various means other than machining.

[Brief explanation of drawings]

Figure 1 is a diagram of conventional tweezers, Figure 2 (a) and (b)
, Fig. 3(c)(d), Fig. 4((1)(h)) are diagrams illustrating the tweezers of the present invention, Fig. 5 and Fig. 6 are diagrams showing the base material, and Fig. 7 is a diagram showing the tweezers of the present invention. The figure showing the clamping tool and Fig. 8 are the figures showing the fork. 1.2... Clipping part 3... Proximal end part 4...・・・・・・Tip 5・・・・・・Base material 9・・・・・・Material patent Applicant, t61 ¥1 Procedural amendment (Noh) 1985, 3h , 5 1. Indication of the case 1985 Patent Application No. 289.707 2. Name of the invention 3. Relationship with the person making the amendment Patent applicant address 5289 Michisho, Nagatsuta-cho, Midori-ku, Yokohama-shi, Kanagawa Prefecture Address (1) Amend the statement of claims in the specification as shown in the attached sheet. (2) Amend "Sumama" on page 3, line 19 of the same to "gap". (3> Page 5 of the same) In the fourth line, "Each alloy or" is replaced with "When Ti is used as a base material, carbonization and nitridation can be performed by laser treatment, partial discharge, or other appropriate heat treatment in a medium gas or powder, or by using a diffused solid electrode. Perform processing, T+c,
T: A layer such as N is obtained at a depth of about 0.01 to 0.1 mm from the surface. Also, or” is corrected. (4) After "tweezers can be made" on page 8, line 3 of the same page, [especially when Ti is used as the base material, laser treatment, partial discharge, etc., using a medium gas or powder, or using a diffused solid electrode, etc.] Carbonization and nitridation are performed by other appropriate heat treatments to form a layer of TiC5TiN etc. from 0.01 to Oo11 from the surface.
It is possible to obtain a depth of about 11 m. ”
Insert. (1) In the processing of medical instruments such as tweezers and forks, tableware, etc., an instrument characterized by having no horizontal gaps when processing from a base material and consisting of a continuous surface of a curved surface and a flat surface. (2) The device according to claim 1, wherein the machining is performed by electrical discharge machining. (3) The device according to claim 1, wherein the base material is a heat-treated base material. (4) The device according to claim 1, wherein the base material is a composite material made by joining a plurality of materials together. (5) The base material is processed by wire-cut electrical discharge machining. The device according to claim 1, wherein one of the X directions is processed in common, and the Y direction perpendicular to the other is processed individually. (6) The base material is Ti and the portions that require hardness are carbonized.
The device according to claim 1, which is nitrided. (7) The device according to claim 6, wherein the carbonization and nitridation are performed by laser treatment in a medium gas. (8) The device according to claim 6, wherein carbonization and nitridation are performed by partial discharge treatment using a diffused solid electrode. ”Procedure Neel) Official document (method) 1, Indication of the case 1985 Patent Application No. 289.707 2, Title of invention device 3, Ministry to amend +! Relationship with t Patent Applicant Address 5289-4 Michisho, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa Prefecture Date of amendment order Procedure Nera, iIE document (method) 1, Indication of case 1985 Patent Application No. 289. 707 No. 2, Invention Title Apparatus 3, Relationship with the Amendment Person Case Patent Applicant Address 5289 Michimasa, Toda-cho, Midori Ward Mayor, Yokohama City, Kanagawa Prefecture
Address 4, Date of amendment order April 28, 1985 5, Subject of amendment Column 6 for brief explanation of drawings in the specification.
Contents of the amendment As shown in the attached sheet (1> Lines 3 to 4 of page 11 of the specification [Figure 2 (a) (
b), Figure 3 (c) (d) J to "Figure 2 (C) (d)
3(c)(f) are diagrams illustrating the tweezers of the present invention.
) is a diagram illustrating the tweezers of the present invention.''

Claims (5)

[Claims] (1) In the processing of medical instruments such as tweezers and forks, tableware, etc., an instrument is characterized in that there is no wedge-shaped gap when processing from a base material, and it is constructed of a continuous surface of a curved surface and a flat surface. (2) The device according to claim 1, wherein the machining is performed by electrical discharge machining. (3) The device according to claim 1, wherein the base material is a heat-treated base material. (4) The device according to claim 1, wherein the base material is a composite material made by joining a plurality of materials together. (5) The device according to claim 1, in which the base material is machined by wire-cut electric discharge machining, in which one of the base metals is machined in the X direction in common, and the Y direction perpendicular thereto is machined individually.