JPS5933371B2 - Manufacturing method of slide fastener - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the manufacturing method of a slide fastener with a releasable fitting or a reverse opening slide fastener, and a box-equivalent body for a slider and an opening fitting. It is an object of the present invention to provide a method for manufacturing a slide fastener that is easy to insert, allows the mating teeth to mesh accurately without pitch deviation, and can automate these operations.

The manufacturing method for this type of slide fastener is to mold and fix a box rod and an insert pin to the edge where the connecting teeth are missing at the end of a unit-length fastener chain, and then attach a slider to the connecting teeth. How to insert, engage, and then attach the box for the opening metal fittings,
A method has been proposed in which a box body for the slider and opening fittings is fitted, then box rods and insert pins are formed and fixed on the left and right stringers, and then both strikegers are engaged, but in the former case, In this case, the resistance when the butterfly pin 9 box rod passes through the slider is large, which tends to cause deviations in the meshing pitch of the engagement teeth, and it is necessary to correct the pitch deviation before fixing the box body, which reduces work efficiency. Unfortunately, stringer engagement and other work must be done manually, and even in the latter case, automatic continuous work is impossible, and manual work is required, both of which have extremely low production efficiency. There were drawbacks.

The present invention provides a method for mechanically automating the production of a slide fastener with a releasable fitting or that can be opened in reverse by having the structure described in the claims, and capable of producing a high-quality slide fastener. It is intended to.

The configuration of the illustrated example will be explained below.

FIG. 1 shows the intermittent fastener chain 1 immediately after the first step is completed.

In order to achieve this state, in the first step, the space portion 2 of the intermittent fastener chain 1 where the interlocking tooth is missing is
Heat-fusible films 5 and 6 are brought into contact with the fastener tape parts 3 and 4 corresponding to the fastener tape parts 3 and 4, and are welded to the fastener tape parts 3 and 4 using ultrasonic waves or high frequency waves to harden the parts.

At the same time as this process, a heat-welding film 9 is applied to a portion covering the first tooth group 8 of the next tooth row 7 following the space portion 2.
is attached and welded to the fastener tape part using ultrasonic waves or high frequency waves, at the same time melting the top tooth group 8, and molding the entire film 9 part to form the top stop 10, and attaching the top part of the fastener tooth row 7. It is fixed to.

As described above, the intermittent fastener chain 1 that has been brought into the state shown in FIG. 1 in the first step is shaped as shown in FIG. 2 in the second step.

That is, in the second step, the connecting edge 1 between the space portion 2 and the upper stop 10 is formed by the anvil and the horn.
1 as a boundary, the intermittent fastener chain 1 is cut into unit length fastener chains 12, and at the same time, the space portion 2
are formed on the side edges 13 and 14 for attaching opening fittings.

At this time, the above-mentioned top stop 10 is divided along the cutting line 15 into left and right top stop pieces 16 and 17.

The space portion 2 is formed on the side edges 13, 14 by cutting and forming the space portion along the cutting line 18.

As mentioned above, the zipper chain 12 is of unit length,
After forming the side edges 13 and 14 for attaching the opening fittings, the third
As a process, as shown in FIG. 3, using the side edges 13 and 14, a slider 19 and a box-equivalent body 20 for an opening fitting having an internal structure symmetrical thereto, in the illustrated example, a box for an opening fitting are assembled. Insert and engage the engaging tooth example 21.

In this insertion and engagement, the side edges 13 and 14 are thin and flat,
Since it does not have any additional structure, the side edges 13, 1
4 is expanded in the left-right direction and introduced into the passage 24 from the shoulder portion 22° 23 of the slider 19, and then the front end 26 of the box-equivalent body 20 is closely disposed to the rear end 25 of the slider 19.
6 into the passage 27, and outward from the shoulder portion 28.29.
This can be easily accomplished with a single mechanical action of pulling out, and by simply introducing the side edges 13 and 14 at the same time, the tooth row 21 is meshed at the correct position without causing any pitch deviation.

After the insertion and engagement of the slider 19 and the box equivalent body 20 is completed as described above, the slider 19 may be left in that position or may be slid in the direction of arrow A.

In the present invention, as a fourth step, as shown in FIG. 4, the box pin 30 and the insert pin 31 are fixed to the side edges 13 and 14 of which the slider 19 and the box equivalent body 20 have been inserted and engaged.

The box pin 30 and the insert pin 31 may be fixed by injection molding of synthetic resin, or may be made of metal and fixed by caulking or other means.

A stopper 32 for orienting the box equivalent body 20 is formed on the box bar 30, as will be described later.

When using a slide fastener with a releasable fitting, slide the box 20', which is the box equivalent body 20, to the outer ends of the box pin 30 and insert pin 31 as shown in FIG. As shown in FIG.
3 to fix the box 20'.

FIG. 7 shows the thus obtained slide fastener with a separable fitting stopper.

In order to create a reverse opening slide fastener as shown in FIG. 8, the box equivalent body 20 shown in FIGS. 3 and 4 is replaced with a slider 34 facing oppositely to the slider 19, and in the fourth step In addition to the two-box rod of the insert pin for the slide fastener with an insert, a slightly longer insert pin equivalent to the two-box rod for the reverse-opening slide fastener shall be fixed.

The present invention has the above-mentioned configuration. First, a heat-welding film is applied to the fastener tape portion corresponding to the space portion of the intermittent fastener chain and the portion covering the first fastener group of the next fastener chain. Since it is welded, hardened, and forms the top stopper, it is possible to harden the part of the fastener tape to which the box rod and butterfly pin should be fixed and form the top stopper in a single process. Since the side edges for attaching the barrel opening fitting and the cutting of the unit length fastener chain can be performed simultaneously, production efficiency can be improved.

In addition, before the box pin and insert pin are fixed, the box equivalent body for the slider and opening fitting is inserted into and engaged with the engagement tooth row, making insertion easy and the engagement tooth row meshing accurately without causing any pitch deviation. Since the work can be mechanically automated, productivity can be improved in this respect as well. Since it is designed to fix the slide fastener, the box pin and insert pin can be designed without considering the ease of inserting the slider, and it also has the effect of increasing the degree of freedom in designing the slide fastener. ing.

[Brief explanation of the drawing]

Figure 1 is an enlarged plan view of the intermittent fastener chain when the first process is completed, Figure 2 is an enlarged plan view of the part shown in Figure 1 when the second process is completed, and Figure 3 is the third process. Fig. 4 is an enlarged plan view of the main parts of the fastener chain when the fourth step is completed, and Fig. 5 is an enlarged plan view of the main parts of the fastener chain when the fourth step is completed. A plan view, Fig. 6 is a back view of the end of the fastener stringer box bar side, Fig. 7 is a plan view of the slide fastener with a releasable fitting shown separately, and Fig. 8 is a reverse-opening slide fastener. FIG. 1... Intermittent fastener chain, 2... Space part, 3.4... Fastener tape part, 5, 6, 9...
・Heat-welding film, 7...Next order of teeth, 8...
・Top tooth group, 10...Upper stop, 11...Joint, 1
2...Unit length zipper chain, 13, 14...
・Side edge, 19...Slider, 20...Box equivalent body,
30...Box stick, 31... Butterfly stick.

Claims (1)

[Claims] 1. A heat-welding film is welded to the fastener tape part of the intermittent fastener chain corresponding to the space where the fastening teeth are missing, and at the same time as it hardens, the top of the next fastener tape following the space is attached. In the part that covers the tooth group,
A heat-fusible film is attached, heated and pressurized, and at least the top stop is formed and fixed by the film, and then an intermittent fastener chain is formed as a unit with the interface between the space portion and the formed top stop as a boundary. After cutting the zipper chain into long lengths and at the same time forming the space on the side edge for attaching the opening fitting, use the side edge to attach the slider and the opening fitting that has an internal structure symmetrical to this slider. Insert and engage the box equivalent body into the tooth row, and as the next step,
A method for manufacturing a slide fastener, characterized in that a box pin and an insert pin are fixed to the side edge for attaching the opening fitting.