JPH0886983A - Production of strap endpiece - Google Patents

Abstract

PURPOSE: To make efficient mass production of strap endpieces having excellent durability by adopting working treatment means consisting of four stages and integrally molding members. CONSTITUTION: A metallic wire is subjected to swaging, by which a bar-shaped base material is obtd. in the first stage. This bar-shaped base material is subjected to pressing and is further, the unnecessary parts are trimmed to form a flat parts 1a and 1b in the second stage. Another part of the bar-shaped base material is pressed approximately perpendicularly to the plane of the flat parts 1a and 1b and further, the flat part 1a is obtd. by trimming the unnecessary parts. The flat parts 1a and 1c at both ends among the flat parts 1a, 1b, 1c at the three points formed by the second stage are subjected to boring in the third stage. The strap endpiece S is obtd. when the bar-shaped base material is curved and formed over the entire part after the flat part 1b is slightly curved to the inner side in the final fourth stage. The strap endpiece S is subjected to a barrel polishing treatment of a wet process at need and is thus finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an improvement in a method for manufacturing a lens stopper for use in rimless spectacles and the like. The present invention relates to a new method capable of efficiently manufacturing a lens stopper having excellent durability by integrally molding.

[0002]

2. Description of the Related Art Recently, there is an increasing demand for smart rimless glasses which are light and rich in fashion, especially two-point type glasses. In such type of spectacles, various contrivances have been made in the shapes and structures of the members used for connecting the spectacle parts to each other, and in general, the number of members having a complicated shape has increased.

However, a member having such a complicated shape,
For example, the lens stopper is usually made of a plurality of members and is manufactured through a process of applying a brazing process or the like to these members to fix them. Therefore, a laborious brazing work is required, resulting in poor work efficiency and high manufacturing cost.

Further, although a titanium-based metal which is light and has excellent corrosion resistance is frequently used as a base material for eyeglasses which have recently become popular, when this titanium-based metal and another metal are joined by using a brazing treatment, There is a drawback that a brittle layer is formed, and as a result, sufficient bonding strength cannot be obtained.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described drawbacks in the conventional manufacturing of lens stoppers for rimless spectacles, and requires brazing processing at all. It is a technical object to provide a manufacturing method capable of efficiently mass-producing lens stoppers having excellent durability by performing integral molding without them.

[0006]

Means adopted for solving the technical problems Means adopted by the inventor for solving the above technical problems will be described with reference to the accompanying drawings.

That is, according to the present invention, a first step of obtaining a rod-shaped base material M by subjecting a metal wire to a swaging process;
A second step of forming at least one flat portion 1 by press working on a predetermined portion of the flat portion 1, and trimming the unnecessary portion 2 pressed around the flat portion 1; The above technical problem is solved by adopting a processing means for performing a third step of making a hole in a portion; and a fourth step of making a bending process on the base material M to bend the whole material. The point is that it was done.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the embodiments shown in the accompanying drawings. 1 to 8 are explanatory views showing the manufacturing process of the lens stopper according to the method of the present invention, and FIG. 9 is a perspective view of glasses using the lens stopper configured by applying the method of the present invention.

A method of manufacturing a lens stop member constructed by applying the present invention will be described with reference to FIGS. 1 to 8. First,
The first step of the method of the present invention is shown in FIG. In the first step, using a commercially available CNC swaging machine, the metal wire is swaged to obtain the rod-shaped base material M. The rod-shaped base material M is formed in a plurality of different diameters (maximum diameter portion 3.4 mmφ, minimum diameter portion 1.3 mmφ) and cut into a length of 20 to 30 mm. As the material of the metal wire rod, pure titanium excellent in strength and corrosion resistance can be used, but β type titanium alloy (for example, Ti72.5 to 75.5%, V21.0 to 23.0%, A
Million β consisting of 3.5 to 4.5% of components and stainless steel (for example, Fe69.5 to 74.0%, Ni8.0 to 10.5%,
SUS304) composed of Cr 18.0 to 20.0% can also be selected. In addition, copper alloys (eg Cu64%, Ni18
%, Zn18% nickel silver), nickel-based high nickel alloys (eg Ni67%, Cu30)
%, Fe2%, Mn1%, Monel and Ni8
0.5%, Cr 13%, Cu 3%, Mo 3%, Mn 0.5% STP), beryllium alloy (eg Cu
Beryllium bronze composed of 98% and 2% Be) may be used. After performing the above-mentioned swaging, if necessary, an annealing treatment is applied to the obtained rod-shaped base material M,
The internal strain of the metal wire can be removed and the spreadability can be improved.

Next, the second step is shown in FIGS. In the second step, a predetermined portion of the rod-shaped base material M is pressed to form flat portions 1a and 1b. Then, the unnecessary portion 2 pushed around the flat portions 1a and 1b is trimmed so that the flat portions 1a and 1b having the shape as shown in FIG.
You get 1b. Further, another predetermined portion of the rod-shaped base material M is pressed substantially at right angles to the surfaces of the flat portions 1a and 1b to form the flat portion 1c. Then, the unnecessary portion 2 pushed around the flat portion 1c is trimmed to obtain the flat portion 1c having a shape as shown in FIG. Then, if necessary,
In order to remove burrs and burrs on the rod-shaped substrate M, a wet barrel polishing process is performed.

Further, the third step is shown in FIG. In the third step, the flat portions 1a, 1b at both ends of the three flat portions 1a, 1b, 1c formed in the second step.
Drill a hole in c. Then, if necessary, the rod-shaped base material M is subjected to a wet barrel polishing treatment.

Finally, the fourth step is shown in FIGS. 7 and 8. In the fourth step, the flat portion 1b of the rod-shaped base material M
When the rod-shaped base material M is entirely bent and shaped after being slightly curved inward, a lens stop S as shown in FIG. 8 is obtained. Thereafter, if necessary, the lens stopper S is subjected to a wet barrel polishing treatment for finishing.

The lens stopping force S obtained by going through the above first to fourth steps is used as a lens L and a temple T.
Rimless glasses as shown in FIG. The lens stop S has flat portions 1a, 1b and 1c.
The flat portion 1a functions as a lens stop hole portion, the flat portion 1b functions as a lens support portion, and the flat portion 1c functions as a hinge piece portion. Therefore, it is possible to efficiently mass-produce the lens stopper having excellent durability by integrally molding the metal wire rod without using a plurality of members to fulfill these functions.

The embodiments of the present invention are generally as described above, but the present invention is by no means limited to the above-mentioned embodiments, and various modifications can be made within the scope of the claims. For example, the order of each step of performing the punching processing of the third step after the bending processing of the fourth step is replaced, and the angle and the number of the pressing processing and the bending processing performed on the rod-shaped base material are changed. Needless to say, such changes are within the technical scope of the present invention.

[0015]

As described above with reference to the embodiments, according to the present invention, a brazing process for a plurality of members, which is indispensable in the prior art when manufacturing a lens stopper for use in rimless glasses or the like, is performed. Since these members can be eliminated and molded integrally, it is possible to mass-produce highly durable lens stoppers with high efficiency, and the manufacturing cost can be significantly reduced. Therefore, the industrial practical value is great.

[0016]

[Brief description of drawings]

FIG. 1 is an explanatory view showing a first step of a manufacturing process of a lens stop tip according to the method of the present invention.

FIG. 2 is an explanatory view showing a second step of the manufacturing process of the lens stop tip according to the method of the present invention.

FIG. 3 is an explanatory view showing a second step of the manufacturing process of the lens stop tip according to the method of the present invention.

FIG. 4 is an explanatory view showing a second step of the manufacturing process of the lens stop tip according to the method of the present invention.

FIG. 5 is an explanatory view showing a second step of the manufacturing process of the lens stopper according to the method of the present invention.

FIG. 6 is an explanatory view showing a third step of the manufacturing process of the lens stopper according to the method of the present invention.

FIG. 7 is an explanatory view showing a fourth step of the manufacturing process of the lens stopper according to the method of the present invention.

FIG. 8 is an explanatory view showing a fourth step of the manufacturing process of the lens stopper according to the method of the present invention.

FIG. 9 is a perspective view of spectacles using lens stop tips configured by applying the method of the present invention.

[Explanation of symbols]

 1 Flat part 1a Flat part (lens stop hole part) 1b Flat part (lens support part) 1c Flat part (hinge piece part) 2 Unnecessary part M Rod-shaped base material S Lens stop knowledge L Lens T Temple

Claims (4)

[Claims] 1. A first step of performing a swaging process on a metal wire to obtain a rod-shaped base material M; a predetermined part of the base material M is pressed to form at least one flat portion 1, and , The unnecessary portion 2 pushed around the flat portion 1
Including a second step of trimming, a third step of forming a hole in a required portion of the flat portion 1, and a fourth step of performing a bending process on the base material M so that the base material M is entirely bent. A method for manufacturing a lens stopper that is characterized by. 2. The method for manufacturing a lens stopper according to claim 1, wherein the metal wire is pure titanium. 3. The method for manufacturing a lens stopper according to claim 1, wherein the metal wire is a titanium alloy containing at least one of V and Al. 4. The method for manufacturing a lens stopper according to claim 1, wherein the metal wire is stainless steel containing components of Fe, Ni and Cr.