TWI626021B - Sewing method for large and small nylon chain racks and double-layer toothed belt structure - Google Patents

Abstract

The utility model relates to a method for stitching large and small nylon chain racks and a double-layer toothed belt structure, characterized in that the upper part of the cloth belt is a large chain rack, the lower part of the cloth belt is a small chain rack, and the seam of the large chain rack is stitched. The line is located on the outer tape of the small chain rack. The width of the lower layer is small and the width of the upper layer is large. Therefore, when the alignment is aligned, the large teeth still have a gap to allow the needle to be inserted into the tape without hurting. The stitching of the lower layer of the small chain rack is performed by stitching the stitches at the left and right sides of the strip at different times, and the seams of the stitches of different piercing points are fixed, thereby completing the upper large chain rack and the lower small chain rack on the left and right sides. On the upper stitching, when the external force tip punctured the zipper in a vertical manner or obliquely, effective safety protection is obtained, and the utility model has the advantages of good anti-theft property, long service life and convenient sewing.

Description

Sewing method for large and small nylon chain racks and double-layer toothed belt structure

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to zippers, and more particularly to a method of stitching large and small nylon chain racks and a double-layer toothed belt structure stitched from large and small nylon chain racks.

In order to increase the strength of the nylon zipper and improve the anti-theft performance, the original single-layer zipper is changed to a double-layer tooth zipper in many bags, tents, etc., and the ordinary double-layer tooth zipper is sewn on the upper and lower sides of the left and right cloth belts. The nylon chain rack of the same specification, that is, the pitch (tooth pitch) of the upper and lower nylon chain rack spirals is the same, the stitches pass through the gaps of the upper and lower nylon chain rack spirals, and the upper and lower nylon chains are The rack is stitched together with the cloth strips in the middle to form the left and right double-layer toothed belts, and then the left and right double-layered toothed belts are inserted into the corresponding double-layered toothed heads, and are matched at both ends. A corresponding double stop or the like forms a double-layer tooth zipper. The same inventor's previous China Patent No. ZL201621077003.6 "A type of upper and lower narrow double-layer tooth zipper for explosion-proof bags" is adopted, and the technical solution adopted is that it includes double-layered toothed belts with upper and lower layers. And a slider for inserting the double-layer toothed belt into the opening and closing, the double-layered toothed belt is sewn with an upper chain rack and a lower chain rack respectively above and below the left and right cloth belts. Forming left and right double-layered toothed belts, respectively, wherein the upper layered rack and the lower layered rack are surrounded by a nylon single-line spiral around the core line in the middle, which is characterized by the lower layer of the rack teeth The width is smaller than the width of the upper chain sprocket, the pitch of the spiral on the upper and lower sprocket racks is the same, and the upper and lower layers are aligned to ensure that the upper sprocket and the lower sprocket are sewn onto the tape. And stitches in the spiral The gap in the line is smoothly inserted. However, when the size of the chain racks of the upper and lower layers is very different, the 10th chain rack and the lower layer are the 2nd chain rack or the 5th chain rack are to be stitched together, because the 10th chain The single wire diameter of the thread for the rack is 1.05 mm, and the single wire diameter of the stitch for the No. 2 chain rack is 0.47 mm, and the single wire diameter of the stitch for the No. 5 chain rack is 0.68 mm. Therefore, if the No. 10 sprocket in the upper layer and the No. 2 sprocket in the lower layer are to be sandwich-stitched, they are too different from the pitch (tooth pitch) of the ordinary nylon sprocket (usually nylon sprocket) The larger the specification, the larger the pitch, the larger the wire diameter used, and the diameter of the stitches used for them are too different to be able to stitch the upper and lower chain racks and the tape together at one time. However, there is an increasing demand for the explosion-proof zipper of the upper-layer larger-sized sprocket and the lower-layer relatively smaller sprocket. If it can effectively solve the sewing problem of the upper and lower two-layer sprocket with different sizes and sizes on the tape. It will play a positive role in the promotion and use of the upper and lower narrow double-layer tooth zippers.

The same inventor's mainland CN105901844A "reverse-wearing mother-child nylon zipper and its sewing method" discloses the structure of the reverse-wearing mother-child nylon zipper and the sewing method thereof, although the patent discloses the specification ratio of the lower-layer sprocket The technical content of the upper sprocket is small. Only if the two standard sprocket belts of different specifications are combined into a double zipper, the pitch of the small-sized sprocket is increased to become a large-sized sprocket. The sprocket with the same pitch can be stitched, so the processing procedure is complicated and the manufacturing cost is relatively increased. In addition, the upper and lower large and small sprocket belts of different specifications are used when the corners of the luggage are folded. The lower chain teeth are mutually squeezed at the corners to affect the sliding and engaging teeth of the zipper head; while the CN203735596U "waterproof anti-theft zipper" patent discloses that the third chain element and the fourth chain element are sewn to the third zipper by stitches respectively. The cloth tape and the fourth zipper tape, the first fastener element and the second fastener element are respectively sewn to the first zipper tape and the second zipper tape by stitching, and the first zipper cloth is stitched by the PU glue layer respectively after sewing. And between the fourth bonding between the fastener tape and the fastener tape and the second tape related third fastener Technical content; however, it has been found that the double-layer toothed belt has the disadvantage that when used on a sewing cloth bag, the curvature of the inner and outer layers of the double-layer toothed zipper is different at the turning of the bag, which causes the upper and lower sprocket teeth when the teeth are combined. Squeeze each other and affect the teeth.

In view of this, the present inventors have invented and designed a large and small nylon chain rack sewing method and a double-layer toothed belt structure through continuous research and improvement.

The main object of the present invention is to provide a method for stitching large and small nylon chain racks with good anti-theft performance, long service life and convenient sewing, and a double-layer toothed belt structure.

The utility model relates to a method for stitching large and small nylon chain racks and a double-layer toothed belt structure, which is characterized in that a cloth belt matched with a large chain rack is first stitched with a small chain rack, and the stitch used is usually The stitches of the small chain racks are correspondingly stitched, and the large stitches are stitched to the other surface of the cloth strip opposite to the small chain racks for the second stitching, and the stitches used are stitched with the stitches of the usual large chain racks. Corresponding to the line, the second stitched stitch is located on the cloth strip outside the small chain rack, and the double-layer toothed belt structure obtained by the stitching method of the large and small nylon chain rack described above is characterized by the upper surface of the cloth strip. For large chain racks, the underside of the tape is a small chain rack, and the stitching stitches of the large chain rack are located on the tape outside the small chain rack. Because the width of the lower layer is small and the large tooth of the upper layer is large, it is When the guideline is being sutured, there is still a gap in the large tooth to allow the needle to be punctured into the tape without injuring the stitching of the small chain rack of the lower layer, so that the stitches of the different piercing points are sewn twice in succession. Fixed seam cooperation method, thus completing The stitching of the large chain rack and the lower small chain rack on the left and right side belts; the upper and lower layers of the upper and lower chain racks are respectively stitched with the same cloth but different positions, and the upper and lower layers are large and small. The chain racks are stitched together by the middle tape, so that the lateral tension of the lower chain rack of the lower chain racks is combined to support the upper layer. The chain rack is effective in protecting the zipper when the external force tip is punctured in a vertical manner or obliquely, and further has the utility of good anti-theft property, long service life and convenient sewing.

[this creation]

(1)‧‧‧ cloth belt

(2) ‧‧‧Small chain rack

(3) (5) ‧‧‧ suture

(4)‧‧‧Large chain rack

Figure 1 is a front elevational view of a chain belt of a conventional wide and narrow double-layer tooth zipper.

2 is a flow chart of a method for stitching large and small nylon chain racks according to an embodiment of the present invention.

Figure 3 is a front elevational view of the first stitching of the small chain rack on the lower surface of the tape in accordance with an embodiment of the present invention.

Figure 4 is a front elevational view of the second stitching of the large chain rack on the upper surface of the tape on the basis of the first stitching in the embodiment of the present invention.

The invention relates to a method for stitching large and small nylon chain racks and a double-layer toothed chain structure. As shown in FIG. 2, a flow chart of a method for stitching large and small nylon chain racks according to an embodiment of the present invention is shown in the figure. It is to firstly suture the tape 1 and the small chain rack 2 matched with the large chain rack under the guidance of the needle plate, as shown in Fig. 3, the stitch 3 used and the small stitch of the usual stitch The stitches of the strips 2 correspond; the large chain racks 4 are then sewn on the other surface of the strip 1 opposite to the small racks 2, and the second stitching is performed, as shown in Fig. 4, the stitches 5 used are The sutures of the large chain racks 4 are usually stitched, and the stitches 5 of the second stitching are located on the cloth strip 1 outside the small chain racks 2. Both the first stitch and the second stitch are stitched together with a double needle.

The double-layer toothed belt structure obtained by the above-mentioned large and small nylon chain rack sewing method is as shown in FIG. 4, which is a large chain rack 4 on the upper side of the cloth belt 1, and a small chain under the cloth belt 1. The rack 2 and the stitching stitch 5 of the large chain rack 4 are located on the tape 1 outside the small chain rack 2. Sewing of the large chain rack 4 and the tape 1 and the small chain rack 2 and the tape 1 The stitching is performed by sewing twice, so that the stitching rack method of the structure which is different from the upper and lower (positive and reverse) sides of the same cloth belt 1 is completed.

It is preferable that the large sprocket 4 of the foregoing embodiment has a single wire diameter of 1.05 mm using a No. 10 sprocket stitch, and the small sprocket 2 is a suture with a No. 2 sprocket. A single wire diameter of 0.47 mm is preferred.

In summary, the foregoing embodiment may also choose to separate the small chain rack 2 from the large chain rack 4, so that the distance between the two different positions of the same cloth belt 1 can be adjusted, and then the teeth are combined. Further, the small chain rack 2 has a large movable space. According to the present invention, the upper and lower large and small chain racks 4 and 2 are respectively sutured by the same cloth belt 1 but pierced at different positions. The lower and upper sprocket racks 4 and 2 are sewn together by the intermediate cloth strip 1 so that the lateral tensile strength of the lower sprocket 2 of the lower small sprocket 2 is engaged to support the upper large sprocket 4 When the external force tip spurs the zipper in a vertical manner or obliquely, it is effectively and safely protected, and has relatively good anti-theft property, long service life, and convenient sewing. The invention has the industrial use value. In order to apply for a patent for invention, I would like to ask the review board of the bureau to examine and grant the patent in detail.

However, the above-mentioned embodiments are only the preferred embodiments of the present invention, and the equivalent variations and modifications made by the scope of the present invention should still be the patents covered by the present invention. Within the scope.

Claims (3)

The utility model relates to a method for stitching large and small nylon chain racks, which is characterized in that it first sutures a strip matched with a large sprocket and a small chain rack for the first time, and the suture used is usually a small chain rack. Corresponding to the suture, and then stitching on the other surface of the tape opposite to the small sprocket with a large sprocket, and performing the second stitching, the stitch used corresponds to the stitch of the large sprocket which is usually sewn, the second time The stitched stitching is located on the cloth strip outside the small chain rack to complete the stitching chain rack method of the structure of different puncturing points on the same cloth belt and below. The method for suturing large and small nylon chain racks according to claim 1, wherein the first stitching and/or the second stitching are stitched together by a single needle stitch or a plurality of stitches. The utility model relates to a double-layer toothed belt structure which is stitched by a large and small nylon chain rack, wherein the upper part of the cloth belt is a large chain rack, and the lower part of the cloth belt is a small chain rack, which is characterized in that: the seam of the large chain rack The line is located on the outer tape of the small chain rack, and the small chain rack can be separated from the large chain rack to achieve the distance between the two different positions of the same cloth belt, and then recombined. The teeth, in turn, allow the small chain rack to have a large living space.