JPS5951804B2 - Method for manufacturing a spring with a claw for a slider with a stop device for a slide fastener - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a spring with a claw to be incorporated into a slider with a stop device attached to a slide fastener, and in particular, the spring with a claw is bent into a chevron shape. It has a stop claw at the rear of the handle attachment part, and a leg part extending in a band shape at the front, and is made of stainless steel.

An object of the present invention is to provide a manufacturing method that facilitates the moldability of this type of claw spring and provides strong spring properties.

Conventionally, a slider provided with this type of mounting spring is known, for example, from Japanese Utility Model Application Publication No. 50-97602, in which the legs of the claw spring are fixed to the slider body.
The handle attachment part straddles the shaft of the handle placed on the slider body, and the stop claw is inserted into the slider body so that the stop claw moves in and out according to the ups and downs of the handle. .

However, slide fasteners with this slider are often used for opening and closing of pants and jackets, which are generally called jeans, but slide fasteners used for these types of clothing, etc. However, complex stresses such as much stronger lateral gravitational force and thrust force are applied.

However, the above-mentioned stainless steel mounting springs are unstable and unreliable, and this can be overcome by forming them with stainless steel that has strong spring properties and has a high cold rolling rate.
When molded from highly resilient stainless steel,
Small parts such as springs with claws that require a lot of bending tend to crack during processing, and the punch blade wears out quickly, making it virtually impossible to obtain strong spring properties. Met.

This invention was developed after researching the above problems, and the molded spring with claws is as shown in Fig. 2.
A handle attachment part 3 is bent upward from the horizontal part 2 and has a rear end hanging down to form a chevron shape, and a stop claw 4 is provided at the rear end.
A band-shaped leg portion 6 is integrally provided at the front end, and a hole 5 is formed in the rear inclined surface of the handle attachment portion 3, and the front portion of the leg portion 6 is bent downward from its longitudinal middle portion. , a fixed part 7 with a wide middle is provided at the lower end, and this leg part 6 is required to have strong spring properties.

Therefore, in the manufacturing method according to the present invention, the handle attachment part 3, the stop pawl 4,
The material for forming the leg portions 6 and the fixing portion 7 is punched out, but before performing the punching process, a portion of the stainless steel plate from which the leg portion 6 is to be punched is stamped at the middle portion in the width direction of the portion. A rolling process is applied along the longitudinal direction, and the surrounding area of the groove 8 created by the rolling process is hardened as shown by the thick broken line in FIG.

After performing this rolling process, punching is performed as described above, and punch holes 5 are also formed.

Next, the mounting spring 1 is finished by performing a bending process.

Note that the above-described mounting spring 1 may be tempered by annealing to further improve its spring properties.

1. When stainless steel is annealed. The color is created by depositing chromium oxide on the surface, and it matches well with the brass color of the slider body, which is molded from red bronze, and also serves as a harmonious color tone.

In addition, in order to attach the mounting spring 1 to the slider body 9, as shown in FIG.
A pair of claw pieces 10, 10 protruding from the upper surface are engaged, a claw piece 11, which also protrudes from the slider body 9, is engaged with the extraction hole 5, and the handle is fitted between the pull attachment part 3 and the upper surface of the slider body 9. 14 shaft portions 15 are fitted, and the pair of claw pieces 10, 1
The legs 6 of the mounting spring 1 protruding from between 0 and 1 are engaged with the grooves 13 formed on the front surface of the element guide column 12, and both side edges of the grooves 13 are crimped to fix the ends of the legs 6. 7
is fixed to the slider body 9.

Furthermore, the stop claw 4 of the mounting spring 1 is connected to the slider body 9.
It penetrates the upper surface of the slider body 9 and enters into the slider body 9.

The claw spring 1' shown in FIGS. 4 and 5 has a different shape from the above-mentioned mounting spring 1. A stop claw 4' is provided at the rear end of the chevron-shaped handle mounting portion 3', and a leg portion is provided at the front end. 6' is the same, but the longitudinal middle part of the leg 6' is bent upward to form a wide fixing part 7', and this mounting spring 1' is also processed as described above. In this method, it is rolled and then punched out to form.

Therefore, a groove 8 is formed in the leg 6'.

This attachment spring 1' is also attached to the upper surface of the slider body 9', and supports the handle 14'.

As described above, in the method of manufacturing a mounting spring for a slider with a stop device for a slide fastener according to the present invention, a stainless steel plate is first subjected to a reduction process, and then punched and formed. Time,
Since the cut is made on the side of the hardened part that has been rolled down, cutting becomes easy, and bending work on areas other than the rolled part is also facilitated, allowing the product to be finished to the specified dimensions without cracking.

Furthermore, the method according to the present invention does not perform rolling after punching, but performs rolling first, so even if the material is deformed by that process, it is cut accurately during punching, so the dimensions of the product do not change. It is produced in large quantities with regular dimensions and no variations.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a slider with a stop device equipped with a claw spring manufactured by the manufacturing method according to the present invention, and FIG.
The figure is a perspective view showing the mounting spring, FIG. 3 is an enlarged sectional view showing the state when the leg part is rolled, and FIG. 4 is another example of the mounting spring manufactured by the manufacturing method according to the present invention. FIG. 5 is a perspective view showing a slider with a stop device provided with a stop device, and FIG. 5 is a perspective view similarly showing a spring with a claw. DESCRIPTION OF SYMBOLS 1... Mounting spring, 2... Horizontal part, 3... Pull attachment part, 4... Stopping claw, 5... Hole removal, 6... Leg part, 7... Fixing part, 8 ...Groove by rolling, 9.
...Slider body, 10, 11...Claw piece, 12...
- Element guide column, 13...concave groove, 14...handle, 15...shaft portion.

Claims (1)

[Claims] 1. Stop claws 4, 4' are vertically provided at the rear ends of the handle attachment parts 3, 3' that are bent into a chevron shape, and leg parts 6, which extend in a band shape and engage with grooves 13 formed in the slider body 9, are provided at the front ends. 6' are made from a cold-rolled stainless steel plate that can be bent. Before continuously punching out the stainless steel plate body in the portion corresponding to the leg portions 6 and 6′, a longitudinal line is cut along the widthwise middle portion of the portion corresponding to the leg portions 6 and 6′. Manufacture of a mounting spring for a slider with a stop device for a slide fastener, which is characterized by applying a rolling process to increase the hardness of the groove 8 portions produced by the process, then punching, and then finishing by performing a bending process. Method.