JPS5841505A - Plastic coil fastener chain having slider inducing part and continuous production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that a plastic coil formed in a shape (.zeta. - A plastic coil fastener chain in which rows of windings sewn to the side edges and parts with windings and missing windings are alternately arranged (for example,
The present invention relates to an improvement of the invention (see Publication No. 06) and a method of manufacturing the improved plastic coil fastener chain.

Conventional plastic coil slide fasteners include a type in which a plastic coil is sewn directly onto one side edge of the tape, and a type in which one side edge of the tape is folded inward (L7).
In the latter type, the plastic coil is hidden by the tape and cannot be seen from outside the tape, so it is generally called a hidden slide fastener. Both types of plastic coil slide fasteners have a common drawback in that they are prone to the following problems during their automatic manufacturing process.

The automatic manufacturing process for plastic coil fasteners includes a process called a slider threading process. The slider threading process involves pushing the slider through the missing winding part, positioning the core cord part of the coil fastener chain in the Y-shaped groove inside the slider, and applying relative motion between the tape and the slider to move the slider. This refers to the process of threading a coil fastener chain through a coil fastener chain. In conventional coil fastener chains, especially hidden slide fastener chains, after threading the slider, the first turns of the left and right stringers closer to the missing winding part engage with each other. Situations like this often occurred. The causes of this include interference between the first turn and the diamond (connecting column of the slider's upper and lower wings) when the slider is passed through, inappropriate tension applied to the tape, and the center of the meshing engagement between the tape surface and the coil. The tendency of the first winding to tilt with respect to the tape surface, that is, so-called "rolling", is considered to be caused by the fact that the tape surface does not match the tape surface. Among these possible causes,
The biggest problem is so-called "falling", and "falling" is particularly likely to occur in the case of hidden slide fasteners. When the zipper chain was sent to the next process with the first turns of each coil of the left and right stringers meshing with each other, the stopper in that process collided with the incompletely meshed first turns. Occasionally, "chain cracking (left and right stringers that interlock to form a zipper chain - the mutual interlock breaks and the left and right stringers separate from each other)" may occur, causing problems in subsequent processes2. occurred often.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plastic coil fastener chain, and a continuous manufacturing method thereof, which facilitates slider threading and prevents chain cracking due to incomplete slider threading.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a plastic coil fastener chain according to the present invention will be explained in comparison with a conventional one with reference to the drawings.

FIG. 1 shows a conventional hidden slide fastener type plastic coil fastener chain 1 viewed from the back. In the figure, 2'+2' are the left and right stringer tapes, and 2a'+2a' are the left and right stringer tapes, respectively.They are the folded parts of the IJ stringer tape, which face each winding 4 of the plastic coil B. 2a', 2J' with the plastic thread 5, and the winding missing part B where each winding of the plastic coil 6 has been removed and only the sewing thread 5 remains, in the longitudinal direction. They are arranged in alternating rows.

The engagement portion 6 of each of the windings has an enlarged portion, and is configured to prevent the engagement from coming off naturally when it engages with the other IJ non-car upper winding facing each other. Although not shown in Fig. 1, the plastic coil is wrapped around core #R7 (see Fig. g2).
-1 B.

FIG. 2 is a diagram showing a part of the process of forming the winding missing part B of the hidden slide fastener type plastic coil fastener chain shown in FIG. First, the interlocking part 6' of the winding 4 of the plastic coil filter is applied to the part that should be the missing winding part! il- is removed to first form a cross-sectional shape as shown in FIG. Next, the remaining portion 4' of the turn remaining on the stringer as a U-shaped fragment is also removed to form the missing turn portion B in FIG. FIG. 4 shows a cross section of the winding missing portion B formed in this manner.

FIG. 5 shows the process of threading a slider through the conventional hidden slide fastener type plastic coil fastener chain 1 shown in FIG. 2o
The figure crosses the slider and shows only the slider lower wing with the slider upper wing removed, and 21 is a connecting column that connects the 7 figures. 4 (1' and 4 are the first windings of the left and right stringers 2a and 2J, respectively, and it can be seen that they are in the incomplete occlusion state described above.

One of the causes of such incomplete occlusion is that the folded parts 2Q', 24' of the missing winding part BKTh tend to be inclined with respect to the tapes 2a, 2J as shown in FIG. The purpose is to encourage people to wake up. That is, when the first turn is first engaged by the slider 20,
Since the first windings are forcibly interlocked with each other in a 7-shaped inclined state, the interlocking state is particularly likely to be incomplete.

FIG. 7 is a plan view of the first embodiment of the present invention, in which a guide portion C is provided between the winding missing portion B and the winding row portion A. The winding 4' in the guiding part C is made by melting the remaining part of the first winding 4 after cutting the occlusal part together with the sewing thread 5 and the core string 7 by ultrasonic waves or high-frequency current, and then melting these and the adjacent windings. The plate-shaped guide portion C is formed integrally with the guide portion C. A cross section of the guide portion C is shown in FIG. In Figure 8, 2, //.

2 #', 4', 5', and 7' are respectively,
The tape shows a folded part, a winding, a thread, and a core string that are once melted and then molded to become part of the plate-shaped guiding part C. Moreover, at this time, the tape reversal part 2α" 2P of the guiding part C may also be melt-molded at the same time. In this way, the tape reversal part 2 all.

2 Since the shape of // is fixed, there is no possibility of the winding "falling", making it easier to thread the syslider.

Suitable materials for carrying out this process smoothly include thermoplastic plastic materials such as polyester, nylon, polyacetal, and polyamide for the coil, thermoplastic synthetic M fiber cloth or a blended fabric of thermoplastic synthetic fiber and cotton for the tape, and sewing thread. Preferably, a thermoplastic material such as polyester is used.

The cutting of the occlusal part of the winding 4 is carried out by the method previously explained based on FIG. 2. First, the cross-sectional shape shown in FIG. A plate-shaped guiding portion having a cross-sectional shape as shown in FIG. 8 is formed by sonic machining, chimney processing, or high-frequency current processing.

FIG. 9 is a schematic diagram when the melt molding process is performed using ultrasonic waves. The incomplete winding part C (the part that should become the guiding part) of the pair of tapes, including the incomplete winding 4' in which the occlusal part of the winding is completely cut, is a core thread supported by the lower spring 32. Separated from each other by 31! Well, 1
While being pressed from both sides by the pair of anvils 30, ultrasonic waves are supplied from above through the horn 33, and the adjacent incomplete windings, sewing thread, core cord, and folded parts are once melted and molded into one piece. This results in a guiding section having a cross section as shown in FIG.

FIG. 10 is a plan view of the second embodiment of the present invention, in which a portion B' of the winding missing portion B near the guiding portion C is melted by ultrasonic machining or high-frequency current machining, similarly to the guiding portion C. Molded. This is even more convenient because the sewing thread in portion B' is also integrated with the core string, eliminating the possibility of fraying and making it easier to push the slider between the core strings.

FIGS. 11 to 13 show a three-step process for threading a slider through the plastic coil fastener chain shown as the second embodiment. At the initial stage of passing the slider, the winding missing part B is inclined in a V-shape as shown in FIG.
Even if it falls into the Y-shaped groove of the slider,
As shown in FIG. 12, the guiding portion formed into a plate shape corrects its posture as it passes through the Y-shaped groove, and when the first windings on the left and right reach the Y-shaped groove, as shown in FIG. It is horizontal as shown. Therefore, the situation shown in Fig. 5 does not occur, and as shown in Fig. 14, all the windings of the winding section are reliably engaged, and so-called "chain cracking" can be prevented. Above, the case where the present invention is applied to a slide fastener type glass coil fastener chain has been described as an example. It goes without saying that the present invention can also be applied to a type of fabric that is directly sewn on one side of the fabric.

[Brief explanation of the drawing]

Figure 1 is a plan view of a conventional hidden slide fastener type plastic coil fastener chain seen from the back side. Figure 2 is a part of the process of forming the winding missing part B of the coil fastener chain shown in Figure 1. 6 is a cross-sectional view of the coil fastener chain after the process shown in FIG. 2 is completed. FIG. 4 is a U-shaped winding of the coil fastener chain shown in FIG. 6. Fig. 1 is a cross-sectional view of the missing winding part of the coil fastener chain formed by removing the remaining part, Fig. 5 is a plan view showing a state in which a slider is passed through a conventional coil fastener chain, and Fig. 6 is a , a diagram showing the "falling" that tends to occur when threading a slider through a conventional coil fastener chain, FIG. 7 shows a flat surface of the first embodiment of the present invention, and FIG.
7 is a cross-sectional view of the guiding portion C of the first embodiment, FIG. 9 is an explanatory diagram of the process of forming the guiding portion C shown in FIG. 8, and FIG. 10 is a second embodiment of the present invention. 11 to 13 are explanatory diagrams of the slider passing process for the second embodiment shown in FIG. 10, and FIG. 14 is a plan view showing a state in which the slider is passed for the second embodiment, I'll go. Explanation of main symbols 21F, 24: Tape 2a', 24': Tape folding part 2a//,
2.6// , Tape reversal part 6: Plastic coil 4: Winding 4' 2 turns (after cutting the occlusal part) 4' 2 turns (after melt molding) 5: Suture 6: Occlusal part 7 of the winding: Core cord A: Winding row part B; Winding missing part C; Guidance part Patent applicant Yoshida Kogyo Co., Ltd. (2 other people) Hoop/Figure tail 2 Figure measure 3 Figure rod, 4 Figure tail 5 Figure milk Otsu Figure effect Tail 7 Diagram 8 [l] Maku q Kusagi gun n t21 412 Figure tail 73 Figure no? -ノ4I21

Claims (2)

[Claims] (1) A winding row section in which a glass coil, each winding formed in a shape that can achieve the function of a coupling gear, is sewn to one side edge of the tape with sewing thread, and a winding row section in which there is no winding. In a plastic coil fastener chain in which missing portions are arranged in alternating rows: an incomplete winding row portion in which only the interlocking portions of several continuous windings are removed at at least one end of the winding row portion; has been set up,
A slider guide characterized in that the incomplete windings of the incompletely wound rows and the sewing thread sewing them to the tape are once melted and then molded to form a plate-shaped slider guiding part. Plastic coil fastener chain with parts. (2) A row of windings in which a plastic coil is molded into a shape that allows each winding to function as a hook and is sewn to one side edge of the tape with a sewing thread, and a winding where there is no first winding. In a plastic coil fastener chain in which the missing parts are arranged in alternating rows, an incomplete winding row is formed by removing the interlocking parts from several turns near the winding missing part of the winding row part. step; applying ultrasonic waves or high-frequency current to the incomplete winding row, which consists of several incomplete windings remaining on the tape after the occlusal part has been removed, and the sewing thread sewing these to the tape; The step of melting the cores and forming them into an integrated plate-shaped slider guide part; sending the plastic coil fastener chain, and then converting the winding row part that is to form the slider guiding part into an incomplete winding row; A continuous manufacturing method for a plastic coil fastener chain having a slider guiding part, characterized by repeating the steps described above: positioning the chain at a predetermined position for forming the parts;