JPH02170115A - Assembling method for spectacle frame and its bending device - Google Patents

Abstract

PURPOSE:To accurately bend a lug in a desired shape by joining an unbent lug with the spectacle frame and then bending the lug after the joining. CONSTITUTION:The unbent lug 5 is joined with the spectacle frame 1 and then bent. This device is equipped with a frame base 39 where a lens frame 2 is fixed, a swing base 30 where the lug 5 is mounted and fixed while the lug 5 and lens frame 2 are joined, a slide base 12 for supporting one end of the base 30 rotatably, and a stopper 17 for controlling the slide base 12 into one-side movement so hat the lug 5 is bent. Then a pressing means for pressing the moving base 13 against the stopper 17 with specific pressing force is provided opposite the stopper 17. The lug 5 after being welded is bent, so the lug 5 is bent accurately in the desired shape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing eyeglass frames made of metal such as titanium or a titanium alloy, and a processing apparatus therefor.

More specifically, the bending of eyeglass frames relates to a manufacturing method for improving machining accuracy and a bending device for the same.

In recent years, titanium or titanium alloys have been used for eyeglass frames.
It has excellent features such as spring properties, and is often used as it fits well in eyeglass frames. Eyeglass frames are composed of a plurality of parts, which are joined together by brazing. What is shown in FIG. 8 is an exploded view of a conventional TA mirror frame. The parts constituting the eyeglass frame 1 include a lens frame 2 as shown in the figure.
．． 2, Bridge 3, Blow width 4.4, Endpiece 5.5, Hinge 6.6, Pad support fitting 7.7 and Temple 8.8
It is composed of parts such as.

These parts are sequentially assembled using brazing. Among these parts, the temple 8.8 and the endpiece 5.5 can be bent into a predetermined shape using a dedicated bending machine or manually.
In many cases, the parts are bent at the component stage. In particular, for the endpiece 5.5, the plate material is bent by approximately 90 degrees as shown in the figure.
In the bent state, it is soldered to the lens frame 2.2 and joined.

Alternatively, in the case of other types of eyeglass frames, the bent endpiece 5 is joined to the blow end 4.4.

[Problems to be Solved by the Invention] The above-mentioned endpiece 5.5 is bent in advance and brazed to the lens frame 2.2 or the blow end 4.4. To join the lens frame 2.2 and endpiece 5.5 with brazing, use a positioning jig or the like to maintain positional accuracy, or
The brazing position is not always accurate due to various factors such as dimensional errors associated with the molding of the endpiece 5.5, molding errors of the lens frame 2.2, and positioning errors. For this reason, the current assembly process involves brazing and joining the bent endpiece 5, and then having the worker make corrections by bending and twisting the endpiece 5.5 using a small tool. There is.

Particularly in the case of end pieces with forks or complex shapes, this repair work is difficult and can only be done by experienced workers. This invention was invented to solve these problems, and achieves the following problems.

An object of the present invention is to provide a method for assembling eyeglass frames that reduces the number of man-hours required for assembling eyeglass frames.

Another object of the present invention is to provide an apparatus for bending the endpiece of an eyeglass frame.

[Means for solving the above problems] The present invention takes the following means to solve the above problems.

A first means is an assembling method for assembling a spectacle frame by joining a plurality of parts, which comprises joining the spectacle frame and an unbent endpiece, and bending the endpiece after joining. It's a method.

The second means is a bending device for bending the endpiece in the first means, and includes a frame stand for fixing the lens frame, and a frame base for mounting and fixing the endpiece in a state where the endpiece and the lens frame are joined. A rocking table, a moving table for rotatably supporting one end of the rocking table, a sliding table for movably supporting the moving table, and a mechanism for regulating movement of only one side of the moving table. This bending device comprises a stopper, and pressing means for pressing the movable table against the stopper with a predetermined pressing force against the sleeve.

The third means is a processing device for bending the endpiece, which includes a frame stand for fixing the lens frame, and a rocking table for mounting and fixing the endpiece in a state where the endpiece and lens frame are joined. , a movable base for rotatably and self-aligningly supporting both ends of the rocking base; a sliding base for movably supporting the movable base; and a sliding base for movably supporting the movable base; This bending device includes a stopper for regulating the bending device, and a pressing means for pressing the movable table against the stopper with a predetermined pressing force in opposition to the stopper.

[Function] In an assembly method for assembling a spectacle frame by joining a plurality of parts, the spectacle frame and the unbent endpiece are joined, and after this joining, the endpiece is bent by a bending device to assemble the spectacle frame. .

The bending device operates as follows. Place the unbendable endpiece on the rocking stand and frame stand. Swing the rocking table to bend the endpiece. The rocking table receives the reaction force of machining and moves backward against the pressing force.

[Examples] Examples of the present invention will be described below with reference to the drawings. What is shown in FIG. 1 is an example of an eyeglass frame 1 manufactured according to the present invention. After assembly, this eyeglass frame does not differ from the conventional eyeglass frame structure. but,
This endpiece 5 is not bent as shown by the dotted line at the stage of being a part. Place the unbent endpiece 5 into the lens frame 2.
Braze to the side of the.

Figure 2 shows the bending device 1 for bending the endpiece 5.5.
0 is shown. The base 11 is a plate-shaped base. A sliding table 12 is fixed on the base 11. A movable base 13 is movably provided on the sliding base 12 with a hair ring interposed therebetween. A shaft support portion 14 is integrally provided at one end of the movable table 13 in a protruding manner. The shaft support part 14 includes
A bearing hole 15 is provided (see FIG. 3) into which a shaft 31 is inserted, as will be described later, and the rocking table 30 swings around this bearing hole 15. At both ends of the sliding table 12, an L-shaped spring receiver 16 and a stopper receiver 17 are attached to the base 11.
It is fixed with a bolt on the top.

A bolt 18 is screwed into the spring receiver 16 parallel to the base 11 and fixed thereto. A coil spring 19 is wound around the outer periphery of the tip of the bolt 18.

One end of the coil spring 19 contacts one end of the adjusting nut 1 20, and this adjusting nut 20 is screwed into the poles 1-18. A lock nut 21 is screwed into the side surface of the adjustment nut 20 to fix the adjustment nut 20. coil spring 19
The other end is in contact with one end of the shaft support part 14 of the movable table 13. Therefore, the coil spring 19 always presses the movable base 13.

On the other hand, on the surface of the shaft support part 14 opposite to the surface in contact with the coil spring 19, there is a bolt 22 that functions as a stopper.
The tips of the movable table 13 are in contact with each other, and the movement of the movable table 13 is stopped. The shaft 31 of the rocking table 30 is inserted into the bearing hole 15 described above. The main body 32 of the moving table 3° has the shape of a cylindrical body divided into four parts in the axial direction. Corner 33 cut at right angle of main body 32
The extension line and the center line 37 of the shaft 31 coincide. Main body 3
A handle insertion hole 35 is provided on the outer peripheral side of 2.
A handle 36 is inserted into the handle insertion hole 35. The divided endpiece mounting surface 34 of the main body 32 is a surface on which the endpiece 5 is placed.

The handle 36 is a handle for manually bending the endpiece 5 by swinging the rocking table 30 around the shaft 31, as will be described later. Three frame stands are fixed on the base 11 in contact with the swing table 30. The frame stand 39 is a stand on which the lens frame 2 described above is placed. One end of the frame stand 39 is provided with a stopper, a groove 26, etc. that are compatible with the lens frame 2 and the endpiece 5 in order to position the lens frame 2 at an accurate position. The stopper and the groove 26 are formed on a positioning jig 25, and the positioning jig 25 is detachably attached to the frame base 39.

The positioning jig 25 is prepared according to the type of the lens frame 2 and the endpiece 5, and is replaced depending on the type. When bending the endpiece 5, the lens frame 2 and the endpiece 5 must be fixed. A press fixing m140 for fixing is provided on the upper part of the frame base 39. A shaft support 41.41 is fixed on the base 11 with bolts. Shaft support stand 41
．． A shaft 42 is provided between the shafts 41, and a swing rod 43 is slidably mounted on this shaft 42.

A holding member 44 is integrally fixed to the tip of the swinging rod 43 with a bolt or the like. The holding member 44 presses the lens frame 2 from above and fixes it on the three frame stands. A vortex 45 is formed on the side surface of the pressing member 44. full 45
As will be explained later, when the endpiece 5 is bent, the hinge 6.6
Uke is for receiving. Figure 5 shows the V in Figure 2.
−■ It is a sectional view. A state in which the lens frame 2 is placed on three frame stands and fixed by the presser member 44 is not shown.

In this embodiment, a photographic film was pasted on the armour-mounting surface 34 with an adhesive so that the surface of the decorative uneven surface 5a formed on the side surface of the armour-piece 5 would not be damaged.

The arcuate surface 46 at the tip of the holding member 44 is a factor that determines the curvature when the endpiece 5 cannot be bent.
The thickness and material curve are determined experimentally depending on the angle. One end of a piston 47 is connected to the rear end of the swing rod 43, and a cylinder 48 of the piston 47 is mounted and fixed on the base 11''.

Eye frame manufacturing method and use of bending equipment
Wide - At least braze the lens frame 2 and the unprocessed endpiece 5 in advance. For those with flow depth 4.4, similarly solder the endpiece 5 to the flow depth 4. Furthermore, the endpiece 5 has a hinge 6.6 and a temple 8.8.
Attach it. However, these steps may be performed earlier or later as required, as has been conventionally done. After this, the eyeglass frame 1, which has 5.5 pieces of endpiece and has not been bent, is placed on a frame stand (Fig. 2). The cylinder 48 is driven to drive the piston 47 upward to push up the rear end of the swing rod/13.

The swinging rod ='13 swings around the shaft 42 and presses the presser member 4.
The lens frame 2 is pressed and fixed onto the frame stand 39 by pressing the holding surface 49 formed at the tip of the lens frame 4 from the top. Next, grasp the handle 36 with your hand and lift it by holding it to one side. The rocking table 30 starts rotating around the shaft 31. The second endpiece 5 on the endpiece mounting surface 34 is pushed up and bent. The inside of this bend is bent to match the curvature of the circular arc surface 46 (see FIG. 5).

However, if the rocking table 30 is rotated as it is around the center line 37, the curvature is different between the inside and outside of the endpiece 5.
It causes slippage between the surface and the surface. That is, the armoury 5 is bent about the center line of the arcuate surface 46, whereas the swing table 30 swings about the center line 37. At this time, a component force is generated that causes shear between the decorative surface 5a of the endpiece 5 and the endpiece mounting surface 3/I. This component force is transmitted to the shaft 3 of the rocking table 30 and does not reach the shaft support 14.

A component force acts on the shaft support part 14 in the direction of compressing the coil spring 9, and the shaft support part 14 compresses the coil spring 19 and moves. That is, the rocking table 30 moves the center of rotation while bending the armouring 5 (t17). The bending of endpiece 5 is hinge 6 on 787I5.
．． It can be bent to the position where 6 fits. When the pan 1-le 36 is returned to its original position after being bent to this position, the handle 36 and the rocking table 30 return to their original positions by the force of the coil springs 9. When the air pressure in the cylinder 48 is restored, the holding member 44 returns to its original position by the reverse operation. Endpiece 5th song (→ is complete. Opposite 1
Bending the endpiece 5 according to the rule is performed in the same manner.

"Other Embodiments" The embodiment shown in FIG. 6 shows an embodiment of the other bending apparatus. FIG.
FIG. Rocking table 3 of the bending machine of the above embodiment
0 has a shaft 31 at only one end (c-). However, only by providing the shaft 31 at one end of the rocking table 30, the supporting strength is strong. Also, when rocking the rocking table 30, the endpiece 5
It depends on the curvature or position of. Therefore, the loads applied to the left and right sides of the rocking table 30 are different. The embodiment shown in FIG. 7 is an improvement on this point.

A shaft 31 is provided at both ends of the rocking table 30. The support 31 is a self-aligning type bearing 5 and is supported by the shaft support P1 portion 14. The shaft support portion 14 supports the piston 53 of the cylinder device 52.
is in contact with the tip of Hydraulic pressure or pneumatic pressure is introduced into the cylinder device 52, and one end of the piston 53 is connected to the shaft support portion 1.
Press 4 to apply pressure to one end of the port 22.

When the rocking table 30 is rocked in the same manner as in the above embodiment,
Endpiece 5 can be bent. At this time, even if the curvature and resistance of the bending differ depending on the position of the endpiece 5, the left and right bearings 51.5 of the rocking table and the cylinder device 52 will naturally absorb the noise due to the shape of the endpiece 5. bending process is possible.

In the embodiment described above, only one endpiece 5 is bent, but both sides may be bent at the same time. Furthermore, a plurality of eyeglass frames may be lined up and processed at the same time. The arcuate surfaces 46 in the embodiment described above have a curvature of -, or in the case of a bifurcated endpiece like the endpiece 5 shown in the embodiment of FIG. 1, the arcuate surfaces 46 each have a different curvature. It is more effective to form

[Effects of the Invention] As described in detail in Section 1, in this invention, the endpiece is bent after brazing, so that the endpiece can be bent into a desired shape with good precision. In addition, the process of adjusting the bending of the endpiece can be labor-saving.

[Brief explanation of the drawing]

Fig. 1 is an exploded view showing an example of an eyeglass frame;
The figure is an overview of the bending device for the endpiece, Figure 3 is the III-In sectional view of Figure 2, Figure 4 is the oblique axis projection of the rocking table,
Figure 5 is a sectional view taken along the line V-■ in Figure 2, Figure 6 is an overview diagram showing the processing equipment, Figure 7 is a plan view of Figure 6, and Figure 8 is a conventional eyeglass frame assembly. FIG. 3 is an exploded view showing the order. ]・Glasses frame, 2・S〉・S frame, 5... Endpiece,
10 The song is a processing device, 11 the base, 13 the moving table,] 9
Coil spring, 30 - Swinging table, 34 - Axis, 34 - Endpiece mounting stand, 39 - Frame stand, 43 - Swinging rod, 48 - Pneumatic cylinder, 51 - Bearing, 52 - Cylinder device

Claims (1)

[Claims] 1. An assembly method for assembling a spectacle frame by joining a plurality of parts, characterized in that the spectacle frame and an unbent endpiece are joined, and after this joining, the endpiece is bent. How to assemble eyeglass frames. 2. The bending device for bending the endpiece according to claim 1, comprising: a frame stand for fixing the lens frame; and a rocking table for mounting and fixing the endpiece in a state where the endpiece and the lens frame are joined. a movable base for rotatably supporting one end of the rocking base; a sliding base for movably supporting the movable base; and a stopper for restricting movement of the movable base on only one side. A bending device comprising: a pressing means facing the stopper and pressing the movable table against the stopper with a predetermined pressing force. 3. The bending device for bending the endpiece according to claim 1, comprising: a frame stand for fixing the lens frame; and a rocking table for mounting and fixing the endpiece in a state where the endpiece and the lens frame are joined. a movable base for rotatably and self-aligningly supporting both ends of this rocking base; a sliding base for movably supporting this movable base; and a movable base for moving the movable base only in one direction. 1. A bending device comprising: a stopper for regulating the bending process; and a pressing means facing the stopper and pressing the movable table against the stopper with a predetermined pressing force.