JPH053051Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to improvements in the stop portion of a slide fastener, and particularly relates to a stop portion molded from synthetic resin.

BACKGROUND ART Conventionally, it has been known to attach a stop at the end of an element row in a slide fastener by injection molding a thermoplastic synthetic resin using a mold, as shown in British Patent No. 940,860, for example. , and a top stopper for waterproof slide fasteners filed by the same applicant as the present application (Utility Application No. 61-199325)
As shown in No. 1), this technology was already in use before the filing of this application.

Problems to be Solved by the Invention However, since the above-mentioned stop portion is attached across both of the pair of element rows, the tearing strength in the left and right directions with respect to the slider movement line is weak, and the stop portion may be damaged. This has become a problem as it shortens the life of the slide fastener.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a stop portion of a slide fastener that is resistant to tearing.

Means for Solving the Problems In order to solve the above problems, the present invention provides the first
As shown in FIG. 5 and FIG. 5, at the stop of the slide fastener in which the end portions of the pair of fastener element rows 15, 15 are coated with soft synthetic resin, the slider 17 is moved into the outer peripheral seal portion 13 of the stop. On the extension line 6 of the line and across it, there is an annular part 2 made of soft synthetic resin that is slightly harder than the stop part, and a thin cut groove that continuously extends from the inner circumference of the annular part 2. By embedding a reinforcing member 1 having an overhanging portion 3 with a 4-way angle, tearing strength to the left and right with respect to the line of movement of the slider is improved.

Example Embodiments of the present invention will be described below with reference to the drawings.

The present invention includes an annular part and an overhang within the stop part on the extension line of the slider's movement line and across the stop part in order to improve the tearing strength to the left and right of the stop part on the extension line of the slider movement line. This reinforcing member is embedded and can be applied to a stop provided at the end of a pair of element rows, spanning both sides.

Fig. 1 shows an example in which the slide fastener for airtightness and waterproofing is applied to the upper end part.The upper end part 7 has a diamond 18 through which the diamond 18 of the slider 17 that has been pulled up is passed through by engaging an element in the center of the upper end part 7. A passage 8 and a diamond storage hole 9 following the passage 8 are provided, and on both sides of the diamond passage 8, welded parts 1 are formed by welding and solidifying the end elements of the element rows 15, 15 together.
1, 11, and a buried element 12 having a reduced height and width.
0 and 10 are also formed to surround the diamond storage hole 9, and the slider 1 is pulled up.
A semi-circular arc-shaped thick outer circumferential seal portion 13 that fits into the opening 19 of 7 to form a seal structure is provided, respectively. A reinforcing member 1 is embedded inside the outer seal portion 13 as shown by the dotted line in FIG.

As shown in FIGS. 3 and 4, this reinforcing member 1 includes a semicircular annular portion 2 having the same shape as the outer peripheral seal portion 13 of the top stop portion 7, and a base portion 14 of the top stop main portion 10.
It consists of a thin overhanging part 3 that overhangs in the direction of , and the overhanging part 3 has two cut grooves 4 that are filled with synthetic resin so that the reinforcing member 1 does not move when the stop part is deformed during use. It is provided. This cut groove 4 is
In order to increase the tearing strength, it is necessary to form the slider off the vicinity of the extension line 6 of the movement line of the slider. The annular portion 2 is provided with projections 5 at three locations so that the reinforcing member 1 is buried inside the stop portion during molding. The shape and number of the cut grooves 4 can be determined as long as the cut grooves are filled with synthetic resin during molding of the top stop part and the reinforcing member does not move when the stop part is deformed during use.
It may have any shape and any number of pieces as appropriate.

FIG. 5 shows a modification of the overhanging portion 3a of the reinforcing member, in which both ends of the overhanging portion 3a are connected to the top main body portion 10.
The base portion 14 of the main body portion of the top stop is also reinforced by extending it close to the top portion.

Next, the method of embedding the reinforcing member when forming the stop part will be described.
15 and the fastener tape 16 to which the element rows 15, 15 are attached are coated and molded by injecting or injecting a flexible thermoplastic synthetic resin such as soft vinyl chloride resin using a mold. To bury the reinforcing member 1, first fill the lower mold with soft vinyl chloride resin, and then place the protrusions 5 on top of it.
Place the reinforcing member 1 with the reinforcing member 1 facing down, then set the fastener tape 16 on top of it so that the embedded elements 12 of the element row will enter the mold, cover this with the upper mold, and pour soft chloride into the upper mold from the injection port. A stop portion with a reinforcing member embedded therein is injected and filled with vinyl resin, and this is heated, cooled, and taken out from the mold to complete a stop portion with a reinforcing member embedded therein.

For the reinforcing member, it is preferable to use the same vinyl chloride resin as the stop part in order to improve the adhesion with the stop part, but instead of vinyl chloride resin, an elastomer with high tensile strength such as polyurethane or polyester can be used. Synthetic resins can also be used. If the reinforcing member is made of a synthetic resin different from the material of the stopper and has poor adhesion to the stopper, it is advisable to compensate by applying an adhesive to the surface of the reinforcing member.

In addition, the hardness of the reinforcing member is preferably slightly higher than the hardness of the stop part so that it can cope with the deformation of the stop part and exhibit a reinforcing effect. When the slider is tightened, it elastically deforms together with the stop and presses the side wall of the diamond stored in the diamond storage hole, and the opening of the slider and the outer seal fit tightly together, providing a high degree of airtightness and waterproofness. In order to increase the tear strength, a soft synthetic resin that is slightly harder than the soft synthetic resin of the stop part is used.

In the embodiment shown in Fig. 1, the reinforcing member is formed into a semicircular arc shape in order to be applied to the top end of the airtight and waterproof slide fastener, but the shape depends on the type of fastener to be applied and the top end. , and the shape of the bottom stop portion, and is designed to correspond to each shape.

Effects of the invention The present invention has the above-mentioned structure, and since the reinforcing member is embedded inside the stop, the tearing strength is strengthened in the left and right directions with respect to the slider's movement line, which has weak tearing strength. In addition, by providing an overhang with cut grooves on the reinforcing member to be buried, the movement of the reinforcing member within the stop is regulated when the stop is deformed during use, reducing damage to the stop and increasing durability. It is possible to further improve the life of the slide fastener by increasing the

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment in which the present invention is applied to the upper end of an airtight and waterproof slide fastener, showing its installed state; Fig. 2 is a perspective view thereof;
Figure 3 is a plan view of the reinforcing member, Figure 4 is Figure 3-
5 is a plan view showing a modified example of the overhanging portion of the reinforcing member, which is applied to the top end portion of an airtight and waterproof slide fastener. DESCRIPTION OF SYMBOLS 1... Reinforcement member, 3... Overhang part, 4... Cut groove, 7... Top stop part, 10... Top stop main part, 13...
...Outer seal portion, 15...Element row, 17...
…slider.

Claims (1)

[Scope of utility model registration request] At the stop portion of the slide fastener in which the end portions of the pair of fastener element rows 15, 15 are coated with a soft synthetic resin, on the extension line 6 of the movement line of the slider 17 within the outer peripheral seal portion 13 of the stop portion, An annular part 2 made of soft synthetic resin that is slightly harder than the stop part extends across this, and the annular part 2
A stop part of a slide fastener characterized in that a reinforcing member 1 is embedded therein, and a reinforcing member 1 is provided with a thin overhang part 3 having a cut groove 4 and continuously overhanging from the inner periphery of the slide fastener.