JPH031403B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a button attachment method.

Various types of buttons are known for use on fabrics such as clothing, but among these, a method of attaching buttons such as snap fasteners to fabrics using a mounting member having a flange and a mounting leg that stands upright from the flange is widely used. It is being The present invention relates to an improvement in the method of attaching this type of button. The base flange of this type of button attachment member is often exposed on the surface of the garment, so a cosmetic cap made of polyester resin (hereinafter referred to as a plastic cap) or a metal cosmetic cap (hereinafter referred to as a metal cap) is often placed on the surface of the flange. ) are fixed or integrally molded. Such plastic caps undergo a whitening phenomenon due to the caulking pressure applied when attaching the button to clothing, and metal caps develop an annular protrusion. Such a whitening phenomenon and annular protrusion phenomenon deteriorate the decorative function of the cap's decorative surface and reduce its commercial value, and a solution to this problem has been desired, but a desirable solution has not yet been provided.

Figures 1 and 2 show a conventional attachment method in which the plastic of the attachment member 3 is inserted into the recess of the fixed die 1 of a button attachment device that includes a fixed die 1 and a movable die 2 arranged vertically. 1 to support cap 4,
A button 7 having a caulking seat 8 facing its mounting leg 5
(In this case, the socket part of the snap fastener)
is fitted to the lower end of the movable die 2, and the movable die 2 is pressed toward the fixed die 1 with the clothing fabric 6 interposed therebetween. As a result, the tips of the legs 5 of the mounting member 3 are caulked toward the seat 8 of the button 7 by the movable die 1, as shown in FIG. When observing the surface of the plastic cap 4 after installation, a whitening phenomenon appears in the area indicated by 9 in FIG. Further, depending on the diameter of the seat 8 of the button 7 and the thickness of the fabric (when it is thin), the fabric may not be torn or may be damaged at the location indicated by 10 in FIG.
Also, in the case of metal caps, instead of whitening, an annular protrusion occurs and, in some cases, tearing occurs.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method of attaching a button which solves the problem of whitening of plastic caps or annular deformation of metal caps.

In order to investigate the cause of the above-mentioned whitening phenomenon and tearing, the present inventor changed the caulking pressure to various values, and found that the whitening phenomenon did not occur up to a certain pressure.
After the curling of the tip was almost completed, a sudden whitening phenomenon was observed, and it was found that the whitening progressed further with further pressure. Moreover, it was found that the curvature of the plastic cap 4 also started at the beginning of bleaching, and that the curvature became larger as the bleaching progressed. As a result, it was found that the whitening phenomenon was caused by the buckling of the base of the mounting leg, which put strong pressure on the plastic cap, thereby causing local deformation of the plastic cap. It was also discovered that the cause of the fabric tearing was due to the curvature of the cap, which brought the bottom of the button closer to the angular parts around the cap. In the case of metal caps, it was also found that the cause is similar, and annular protrusions occur due to local deformation due to buckling of the mounting legs. Therefore, the present invention suppresses or eliminates the whitening phenomenon and the annular protrusion phenomenon by using a mounting method characterized in that the mounting leg of the mounting member is swaged while pressing the periphery of the cap to suppress the deformation of the cap when the button is swaged. Depending on the structure of the button and the attachment member, a secondary effect can also be obtained in that the problem of damage to the fabric can be solved at the same time.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 4 shows a button mounting device suitable for carrying out the method of the present invention, for example, as shown in FIG. 5 and FIG. It is possible to attach buttons 13, 13', etc., which have seats 12 that can be caulked.
The attachment device has a fixed die 14 and a movable die 15 vertically aligned therewith and having a predetermined stroke necessary for attachment. The fixed die 14 has a tubular mounting leg 1
7 and a plastic cap 16 fixed to the flange thereof by resin molding. The movable die 15 has a tip 19 with a shape suitable for caulking, and also has an outer peripheral portion 20 that can temporarily hold the button 13. The movable die 15 is connected from a shaft 21 to a power source via a link mechanism.

The shaft 21 is provided with a sliding sleeve 22 on its outer peripheral surface, and its inner diameter is set to be slightly larger than the outer diameter of the button 13. The sliding sleeve 22 protrudes beyond the movable die 15 when the movable die 15 descends for caulking, and further protrudes beyond the button 13.
It is adapted to be driven to contact and press the material 23 and the periphery of the plastic cap of the attachment member 18 slightly earlier than the movable die. The sliding sleeve 22 is connected to the power transmission means through a strong elastic body such as a rubber sleeve or a spring, so that the lower end of the sleeve 22 presses the periphery of the plastic cap 16, and when further pressing force is applied, the spring flexes. to absorb the power.

In carrying out the method of the present invention, the button 13 is fitted to the tip of the movable die 15 to temporarily support it, and the fixed die 1
4 is the plastic cap 16 of the mounting member 18.
is supported, and predetermined portions of the fabric 23 are aligned with the die. Next, when the shaft 21 is lowered, the sliding sleeve 22 and the movable die 15 descend, but the sleeve 22 descends faster than the movable die 15, and as shown in FIG. Press around the area. When the movable die 15 is further lowered, the sliding sleeve 22 remains in that position and continues to press the plastic cap 16 due to the action of a strong spring (not shown). The movable die 15 finally engages the upper end of the mounting leg 17 of the mounting member 18 and curls and caulks it outward. When the movable die further descends, the upper end of the mounting leg is caulked,
The base of the mounting leg begins to buckle. However, since the periphery of the plastic cap 16 is held down by the sleeve 22 which is held down by a strong spring, the cap 16 does not deform and remains in its original shape.

The present inventor conducted a number of experiments using the above-mentioned apparatus, and confirmed that the whitening phenomenon could be almost completely prevented. The fact that we were able to prevent the whitening phenomenon even though the pressing force by the movable die 15 was the same as that of the conventional device indicates that the whitening phenomenon is mainly due to deformation rather than local stress in the plastic cap. Ru. The present invention has been able to prevent the whitening phenomenon, which has been a problem in the past, by a simple but extremely effective means of preventing such deformation simply by the action of a sliding sleeve. In addition, with the conventional method, damage to the fabric may occur due to deformation of the cap (permanent deformation and elastic deformation may be involved), but since deformation is prevented as in the present invention, damage to the fabric may occur. A secondary effect of solving this problem of fabric damage was also obtained.

7-8 show other examples of the invention. A pair of claw members 26, 26 are pivotally attached to both sides of the fixed die 24 so as to surround the mounting member support surface, and are normally pushed outward by a compression spring 27. On both sides of the movable die 25, there are cam plates 2 integrated with the movable die.
8 and 28 are provided, and these contact the cam driven surfaces at the upper ends of the pawl members 26, 26 via the fabric 29 when descending, thereby causing the pawl members 26, 26 to move inward ( (closed direction). In operation, when the button 13 and the attachment member 18 are attached to predetermined positions on the die and the movable die 25 is lowered with the fabric 29 interposed therebetween, the cam plates 28, 28 drive the claw members 26, 26 inward. Press down on the plastic cap 30 of the mounting member. Thereafter, the installation operation is completed in the same manner as in the previous example. This example also prevents the whitening phenomenon as described above.
This example has the advantage that there is no need for a difference between the outer diameter of the button and the outer diameter of the mounting member as in the previous example, and the dimensions of the button and the mounting member can be varied over a wide range. This has the disadvantage that it is more complicated than the previous example.

It will be apparent to those skilled in the art that many variations are possible within the scope of the invention.

[Brief explanation of the drawing]

Fig. 1 is a sectional view illustrating the initial stage of the conventional button mounting method, Fig. 2 is a sectional view showing an intermediate stage of the conventional button mounting method, Fig. 3 is a plan view of the plastic cap of the mounting member, and Fig. 4 is a sectional view illustrating the initial stage of the conventional button mounting method. The figure is a sectional view showing an apparatus and an initial stage for implementing the method of the present invention, FIG. 5 is a sectional view showing an example of a button, FIG. 6 is a sectional view showing another example of a button, and FIG. 7 is a sectional view showing an example of a button. FIG. 8 is a sectional view showing the initial stage of the button mounting method of the present invention, and FIG. 9 is a sectional view showing an intermediate stage of the method. The main parts in the figure are as follows. 14, 24: Fixed die, 15, 25: Movable die, 22: Sliding sleeve, 26: Claw member, 28:
cam board.

Claims (1)

[Claims] 1. A method for attaching a button having an insertion hole of the attachment leg and a caulking seat around the attachment leg to clothing by using a button attachment member comprising a metal attachment leg having a base flange and a cap fixed to the base flange. A button characterized in that the cap is supported by a mold, the mounting leg is projected through the clothing material into the insertion hole of the button, the periphery of the cap is pressed, and then caulking pressure is applied to the top of the mounting leg. Installation method.