JPS635537Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a slide fastener stringer in which a continuous element is sewn and fixed to the edge of a fastener tape.

A slide fastener stringer (hereinafter simply referred to as a stringer), in which a continuous element such as a coil element is sewn along the side edge of a fastener tape using a double chain stitch or the like via a core string, can hold the elements firmly and orderly. In particular, it is desired that the lateral pull strength (resistance in the direction of pulling apart the slide fastener chain when it is sewn to a product as a slide fastener and closed) be high.

In order to meet the above-mentioned needs, this invention improves the structure of the woven tape that sewn and fixes the continuous elements, and the tissue in the range where the lower legs of the continuous elements touch the tape edge is divided into the coarse tissue part and the dense tissue part. , a stringer in which coarse tissue parts are arranged, and a sewing thread engaged with the upper surface of the upper leg of the continuous element is passed through the core cord and sewn to each coarse tissue part,
As a result, when viewed from the cross-sectional direction of the tape, the sewing thread and the dense tissue area form a triangular arrangement. By forming a substantially right angle so that the triangles form a substantially right triangle, a stable and strong sewing state can be obtained.

The embodiments shown in the drawings will be explained below.

Figure 1 is a plan view showing the main part of the stringer with some coil elements removed, and Figure 2 is the same as Figure 1.
This is an enlarged cross-sectional view along the XX line, and the woven tape T is provided with a narrow dense tissue portion 2, a coarse tissue portion 3, a dense tissue portion 4, and a coarse texture portion 5 along the side edge portion 1, and has a base fabric portion. It is connected to 6.

In the coil element E, the occlusal head 10 is provided on one side, and the lower leg part 12 and the upper leg part 13 are formed in a continuous spiral shape, and the core string 7 is inserted into the spiral space with a bias toward the inverted part 12 side. There is. The occlusal head 10 of the coil element E protrudes laterally from the side edge part 1 of the woven tape T, and the lower leg part 11 of the coil element E protrudes from the side edge part 1 of the woven tape T. structure part 2, coarse structure part 3, dense structure part 4,
The double chainstitch threads 20 and 21 are positioned so as to substantially abut on the coarse tissue portion 5, and pass through the core string 7 between the adjacent upper leg portions 13 of the coil element E, so that both coarse textures of the woven tape T are connected. 3 and 5, and forms a tangled part on the upper surface of the core cord 7 between the adjacent upper leg parts 13, and the sewing thread is inserted into the upper leg parts 13 as shown in 22.
The coil element E, the core string 7, and the woven tape T are sewn and fixed together.

At this time, by adjusting the thread tension of the two needle threads of the double chainstitch sewing machine, the needle threads pass through the core cord 7, and both coarse tissue parts 3,
The sewing threads 20, 21 and the dense tissue portion 4 sewn into the tape are arranged in a triangular shape when viewed from the cross-sectional direction of the tape. As shown in the figure, the sewing thread 20 is sewn at a substantially right angle to the woven tape T, and the other sewing thread 21 is sewn at an angle to the base fabric 6 side of the woven tape T, so that the sewing threads 20, 21 and The arrangement is such that a substantially right triangle is formed by the dense tissue portion 4 sandwiched between the sewing positions.

The stringer having the above structure has a dense tissue part 4 between the two sewing threads 20 and 21 that is difficult to deform by external force, and when a horizontal pulling force is applied, a tensile force is applied to the sewing thread 21. However, at the same time, the tensile force is transmitted to the sewing thread 20 through the dense tissue portion 4, resulting in tensile force resistance.In particular, since the sewing thread 20 is approximately perpendicular to the woven tape T surface, its sewing The movement of the point in the pulling direction immediately acts as a tension on the sewing thread 20, and both sewing threads 20, 2
1 effectively contributes to increasing the horizontal pulling strength.

The dense tissue portions 2 and 4 of the woven tape T described above are usually plain weave, and the coarse tissue portions 3 and 5 are made of sewing threads 20 and 2.
The woven tape T may have a weave such as a basket weave, a ribbed weave, or a herring twill weave, which has a thread density that does not cause deformation such as puckering when the woven tape T is inserted.

As explained above, the stringer of the present invention has a dense tissue part sandwiched between the sewn edges of continuous elements of a woven tape, and coarse tissue parts are provided on both sides, and these coarse tissue parts are used as the sewn part of the sewing thread to connect the core string. The continuous element can be stably and firmly sewn and fixed through the tape, and the right-angled triangular arrangement of both sewing threads and the dense tissue portion increases resistance to tape horizontal pulling, which is the most important horizontal pulling strength for slide fasteners. This is a significant improvement.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 is a plan view showing the main part of Fig. 1 with some coil elements removed, and Fig. 2 is an enlarged sectional view taken along line XX in Fig. 1. be. 1... Lateral ear part, 2... Thin dense tissue part, 3, 5
... Coarse tissue part, 4... Dense tissue part, 6... Base fabric part,
7... core string, 10... occlusal head, 11... lower leg part, 12... reversal part, 13... upper leg part, 20,2
1... Sewing thread, T... Woven tape, E... Coil element.

Claims (1)

[Scope of utility model registration request] In a slide fastener stringer having a continuous element that engages with the upper surface of the upper leg of the element, passes through the core string, and is sewn and fixed to the woven tape with a sewing thread, the woven structure of the sewn edge of the element of the woven tape is , the area where the lower leg surface of the element touches, consists of a dense tissue part along the edge of the tape and a coarse tissue part disposed on both sides of the tape edge, and the sewing thread is hooked and sutured to each coarse tissue part, and the tape is When viewed from the cross-sectional direction, the sewing thread on the coarse tissue side near the tape edge is approximately perpendicular to the tape surface, and the sewing threads on the dense tissue part and other coarse tissue parts form an approximately right triangle. A slide fastener stringer characterized by being sewn with.