JP6656672B2 - Temple for spectacles and method for producing the same - Google Patents

Description

  The present invention relates to a temple for spectacles using a metal stranded wire formed by twisting a plurality of metal wires and a method for manufacturing the same. It relates to the manufacturing method.

  Eyeglass frames using metal strands for part or all of temples are commercially available as so-called "rope-hand styles", and are becoming increasingly popular in recent years because they are lightweight, comfortable to wear, and have high design. Among such spectacle frames, those employing a “rope-handed style” in an ear-hook portion formed in a curved shape so as to hang on the wearer's ear are also commercially available. For example, see Patent Documents 1 to 6. Various temples have also been proposed in which the ear hanging part has a “rope-hand style”.

Japanese Utility Model Publication No. 61-44186 Japanese Utility Model Publication No. 62-32263 JP-A-5-224161 Japanese Utility Model Publication No. 7-029518 Utility Model Registration No. 2607107 Japanese Utility Model Registration No. 2541719 (see FIG. 1 in the drawings and paragraph 0014)

  By the way, in the above-mentioned spectacle frame and the spectacle frame described in the above-mentioned literature in which the curved ear hanging portion is a rope hand style, it is difficult to maintain the shape only by bending the winding wire or metal stranded wire wound in a coil shape as it is. For this reason, a "rope-hand style" is formed by placing a core material for maintaining the shape at the center of a winding or metal stranded wire.

  For this reason, there is a problem that the diameter of the ear hook portion is increased by the amount required for another member such as a core material for maintaining the shape. In addition, eyeglass frames in which the entire temple including the ear hanging part is made `` rope-hand style '' are also commercially available, but since the diameter of the other parts of the temple needs to be increased according to the diameter of the ear hanging part, There is a problem that it is not possible to sufficiently meet the market demand for a rope-style eyeglass frame that is lighter and has a smaller contact area with the skin and is more comfortable to wear.

  The present invention has been made in view of the above problems, and does not require a separate member for maintaining the shape such as a core material, and is capable of forming an ear hook portion by directly bending a metal stranded wire. An object of the present invention is to provide a temple and a method for producing the temple.

The temple for eyeglasses manufactured by the manufacturing method of the present invention is formed from a metal stranded wire formed by twisting a plurality of metal wires, and in a temple for eyeglasses having a curved ear hanging portion, the periphery of the metal stranded wire. And a gap between the metal wires formed by plastically deforming the metal wire by applying a pressing force to the metal wire, and a curved portion in which the metal stranded wire is deformed into a curved shape at the gap portion.
In the present invention, the metal stranded wire can be easily deformed into a curved shape by the gap formed between the metal wires, and a core material for maintaining the shape is not required. Of course, when the number of metal wires constituting the metal stranded wire is four or more, one or more metal wires may be arranged at the center, but in the present invention, the metal wire is arranged at the center. The metal wire does not need to have a shape maintaining function. That is, the metal wire is not provided with a core material at the center of the metal stranded wire for maintaining the shape of the metal wire or the like.
Further, the pitch of the metal stranded wire is preferably smaller than a reference stranded pitch , and when the metal stranded wire is formed of three of the metal wires, the pitch is set to the diameter of the metal stranded wire. It is good to make it 3 to 4 times . At least a part of the plurality of metal wires may be titanium or a titanium alloy.

The method for manufacturing a temple for spectacles of the present invention, as described in claim 1, is formed of a metal stranded wire obtained by twisting a plurality of metal wires, and has a curved shape without a core material for maintaining a shape. A method for manufacturing a temple for eyeglasses having an ear hanging portion, wherein a pressing force is applied from around the metal stranded wire, and the gap is formed by plastically deforming the metal wire so that a gap is formed between the metal wires. A plastic deformation step to be formed, and a terminal treatment is performed on the end so that the end of the metal stranded wire that is provided after the plastic deformation step and that is cut to a predetermined length as the ear hook part does not unwind. And a bending step provided after the plastic deformation step or the terminal processing step for bending the metal stranded wire, and the plastic deformation rate of the metal wire in the plastic deformation step. By adjusting There the radius of curvature of the curved working as a method of magnitude adjusted. The terminal processing step and the bending processing step may be reversed before and after the step. In the present invention, the metal stranded wire having no core material for maintaining the shape can be used.

The application of the pressing force may be divided into a plurality of times as described in claim 2, and the pitch of the metal stranded wire is five times the outer diameter D of the metal stranded wire as described in claim 3. It may be smaller than the standard twist pitch which is 8 times . Further, when the metal stranded wire is formed from three of the metal wires, as described in claim 4 , the metal twisted wire is 5 to 8 times the diameter of the metal stranded wire and the standard twist pitch is 5 to 8 times. Preferably, the pitch is 3 to 4 times . Further, as described in claim 5, the application of the pressing force may be performed by swaging.

In the present invention, it is easy to form the metal stranded wire into a curved shape simply by plastically deforming the metal stranded wire by swaging or the like, and other members for maintaining the shape such as a core material are not required. For this reason, it is possible to form an extremely small diameter “rope-style” temple, and it is possible to provide a new-design eyeglass temple that is lightweight, has a small contact area with the skin, and has a good wearing comfort.
By making at least part of the plurality of metal wires titanium or a titanium alloy, it is possible to prevent metallic allergy such as allergic dermatitis. Further, even if sweat or the like enters the gap between the metal wires, it can be prevented from corroding.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an embodiment of a temple for spectacles of the present invention, in which (a) shows an example of a metal twisted wire formed by twisting a plurality of metal wires, and (b) shows a metal twist of (a). It is II sectional drawing of the line.
As the metal wire constituting the metal stranded wire 1, a titanium alloy wire, a stainless steel wire, or the like can be used. By using a titanium wire or a titanium alloy wire, it is possible to prevent metallic allergy such as allergic dermatitis or the like. There is an advantage that corrosion due to sweat or the like can be prevented. In the following embodiments, the metal wire will be described as a titanium alloy wire 2. Further, the number of the titanium alloy wires 2 to be twisted can be two, three, or four or more, but in the following description, the number is described as three.

First, three metal alloy wires 1 are formed by twisting three titanium alloy wires 2. When three titanium alloy wires 2 are twisted to form a metal twisted wire 1 as shown in FIG. 1, the titanium alloy wire 2 can have a wire diameter d of 0.5 to 1.5 mm. Further, the outer diameter of the stranded metal wire 1 formed from the titanium alloy wire 2 having such a wire diameter d is generally in the range of D = 1.0 to 3.3 mm.
In general, the pitch p of this type of metal stranded wire is about 5 to 8 times the outer diameter D of the metal stranded wire 1 (the “standard twist pitch” when the value is three twists). In this case , it is set to about 3 to 4 times smaller than this . If the pitch p exceeds 4 times, the effect of suppressing the unwinding of the titanium alloy wire 2 during the rolling process is small, and if the pitch p is smaller than 3 times, the titanium alloy wire 2 is easily cut.
The form of twisting may be either S-twisting or Z-twisting, but for a pair of left and right parts such as a rim, it is preferable that one is S-twisted and the other is Z-twisted for design reasons.

The metal stranded wire 1 is crushed by applying a pressing force from two directions or three or more directions on the outer peripheral surface of the metal stranded wire 1. At this time, the titanium alloy wires 2 are not pressed so as to be in close contact with each other, but each of the titanium alloy wires 2 is metal-deformed while plastically deforming the cross-sectional shape of each of the titanium alloy wires 2 constituting the metal stranded wire 1. By plastically deforming the stranded wire 1 so as to expand in the radial direction, a gap is formed between the titanium alloy wires 2 of the metal stranded wire 1.

  2A is a photograph of a 1.40 mm diameter metal stranded wire 1 formed by twisting three 0.65 mm diameter titanium alloy wires 2, and FIG. 2B is a photograph of the metal stranded wire 1 of FIG. It is a photograph after swaging processing. In FIGS. 2A and 2B, the left is an enlarged photograph of the metal stranded wire, and the right is a cross-sectional photograph of the metal stranded wire. The processing rate (the reduction rate of the cross-sectional area of the metal stranded wire 1 after the swaging process with respect to the cross-sectional area of the original metal stranded wire 1) in the example of this figure is 26.5%.

The plastic deformation of the metal stranded wire 1 as shown in FIG. 2 can be performed by a process other than the swaging process, for example, a rolling process or a press process. In addition, the application of the pressing force from around the metal stranded wire 1 by these processes may terminate the target plastic deformation by applying the pressing force once, but the pressing force may be reduced each time. By applying the pressing force in a plurality of times, the plastic deformation of the metal stranded wire 1 due to the initial pressing force application serves as a guide, so that the metal stranded wire 1 is hard to be unwound in the subsequent pressing force application. There is an advantage that can be.
Further, as shown in FIG. 2, the gap between the titanium alloy wires 2 also functions as a design in the temple.

FIG. 3 is a view showing a process of forming a temple ear hanging portion having a curved portion from the metal stranded wire 1 formed by the above procedure.
First, the metal stranded wire 1 is cut into a predetermined length L as a hook portion, and a metal stranded wire 1 ′ having a length L (hereinafter, the cut metal stranded wire is denoted by a symbol “1 ′”). Form.
Next, the ends 1a 'and 1b' of the metal stranded wire 1 'are terminated so that the ends 1a' and 1b 'are not unwound. Examples of the terminal treatment include a method of impregnating the ends 1a 'and 1b' with the molten silver solder, and fitting or attaching a cap-shaped terminal member.

The metal stranded wire 1 ′ can easily form the curved portion 1 c ′ by pressing the portion of the metal stranded wire 1 ′ to be bent against the bending mold.
This is considered to be because each metal wire 2 is easily plastically deformed by a gap (see FIG. 2B) between the metal wires 2 formed by swaging or the like.

After the formation of the curved portion 1c ', one end 1a' is inserted into a hole formed in the temple body T as shown in FIG. 3 (b) and fixed by brazing or the like. Of course, it is also possible to form the entire temple in the "rope-hand style", and in this case, one end 1a 'may be fixed to the wisdom by brazing or the like.
When the end portion 1a 'is inserted into a hole or the like of the temple main body T and brazing is performed, this process may be used as a terminal treatment of the end portion 1a'.

Although the preferred embodiment of the present invention has been described, the present invention is not limited to the above description.
For example, in the above description, a titanium alloy wire or a stainless steel wire is taken as an example of a metal wire, but other metal wires may be used as long as they can be used as eyeglass temples.

In the above description, the metal stranded wire 1 composed of three metal wires 2 is taken as an example. However, the number of metal wires 2 may be four or five or more, and different types of metal wires 2 are stranded. The metal stranded wire 1 may be formed together. When four or more metal wires 2 are provided, one or more metal wires 2 may be arranged at the center. In this case, the metal wire 2 disposed at the center can be made of the same or different material as the other metal wires 2 constituting the metal stranded wire 1 or of the same diameter or different diameter.
Further, each metal wire 2 constituting the metal stranded wire 1 may be a single wire, or may be a stranded wire formed by twisting a plurality of metal wires.

According to an embodiment of the temple for spectacles of the present invention, (a) is a diagram showing an example of a metal stranded wire formed by twisting a plurality of metal wires, and (b) is an I- of the metal stranded wire of (a). It is an I direction sectional view. 1.40 mm diameter metal stranded wire 1 (see (a)) formed by twisting three titanium alloy wires 2 having a diameter of 0.65 mm, and metal stranded wire obtained by flat rolling this metal stranded wire 1 1 (see (b)). It is a figure explaining the process of forming the ear hanging part of the temple which has a curved part from a metal stranded wire.

1 Metal stranded wire 1 'Metal stranded wire (after cutting)
1a ', 1b' End 1c 'Curved portion 2 Titanium alloy wire (metal wire)
The body of T Temple

Claims (5)

A method for producing a temple for spectacles having a curved ear hanging portion having no core material for maintaining a shape , which is formed from a metal stranded wire obtained by twisting a plurality of metal wires,
A plastic deformation step of applying a pressing force from around the metal stranded wire and forming a gap by plastically deforming the metal wire so that a gap is formed between the metal wires,
Provided after this plastic deformation step, so that the end of the metal stranded wire cut to a predetermined length as the ear hanging portion, so that the end of the metal stranded wire does not unwind, a terminal processing step of performing terminal processing on the end ,
A bending step is provided after the plastic deformation step or the terminal processing step, and bending the metal stranded wire.
By adjusting the plastic deformation rate of the metal wire in the plastic deformation step, to adjust the radius of curvature of the bending process,
A method for producing a temple for eyeglasses, comprising: The method according to claim 1, wherein the pressing force is applied in a plurality of times. 3. The method of manufacturing a temple for eyeglasses according to claim 1, wherein a pitch of the metal twisted wire is smaller than a standard twist pitch. 4. When the metal stranded wire is formed from three of the metal wires, the pitch is 3 to 4 times the reference twist pitch, which is 5 to 8 times the diameter of the metal stranded wire. The method for producing a temple for spectacles according to claim 3. The method for manufacturing a temple for spectacles according to claim 1, wherein the application of the pressing force is performed by swaging.