TWM479040U - Line style slide fastener featuring spiral tooth - Google Patents

Description

Spiral toothed line zipper

This creation is about a spiral toothed line zipper, especially a line zipper with a spiral thermoplastic resin sprocket.

Generally, the nylon zipper comprises a pair of zipper tapes, and a pair of helical toothed thermoplastic resin element rows are respectively fixed on the opposite longitudinal edges thereof, and a zipper head is slidably arranged on the respective sprocket teeth of the two sprocket rows to reciprocate Open and close the two rows of chain teeth. The lower end of the two chain sprocket of the zipper must be fixed to the upper end and the lower end to limit the reciprocating displacement stroke of the zipper head.

At present, when the outer diameter of the sprocket helical ring of the nylon zipper is 2.6 mm or more, the zipper tape and each of the fastener elements can be combined with two rows (inclusive) of the suture. When the outer diameter of the sprocket helical ring of the conventional nylon zipper is less than 2 mm, the fastener elements can only be fixed by sewing with a single row of stitches. However, the stitching of the chain of teeth, whether it is a single row of two or two rows of stitches, the stitching does not securely position the fastener elements, thus affecting the smoothness of the engagement of the two rows of fastener elements, and reducing the meshing of the two rows of fastener elements. The structural strength and its lateral tensile strength are easily pulled by the lateral direction to cause the two rows of fastener elements to be disengaged. Therefore, how to solve the above-mentioned shortcomings and shortcomings of the prior art is the subject of improvement for those involved in this industry.

The main purpose and use of this creation is that the line zipper uses the loop stitch and The two rows of sprocket teeth are formed with pressing welding portions to ensure the stable fixing of the sprocket teeth, thereby improving the meshing strength of the left and right rows of sprocket teeth and the lateral tensile force thereof, thereby avoiding improper disengagement of the two rows of sprocket teeth, and the two rows of chains The meshing action of the teeth is more precise and smooth.

In order to achieve the goal, the author provides a spiral toothed line zipper with two opposite chain rows on the adjacent sides of the two zipper tapes. The two chain rows are spirally wound by thermoplastic resin lines. Arranging into a plurality of sprocket teeth, the two rows of sprocket teeth each having a toothed head that is engaged with each other by opposite sides, and the upper end portion and the opposite lower leg portion are extended from the opposite ends of the tooth head toward the other side in the width direction, and the other side of the foot portion above each of the sprocket teeth Forming an inversion portion coupled to the lower leg of the adjacent sprocket in the same row; the two zipper tapes are stitched along the length direction between the sprocket of the sprocket row to form a suture on the top of each leg The loop stitches are respectively bundled; the loop stitches have hot-melt fibers, and the loop stitches and the upper leg sections of the two rows of fastener elements are melted to form a press-welded portion.

In a preferred embodiment, the two-toothed teeth are inserted into the respective sprocket teeth with a core wire inserted along the longitudinal direction, and the core wire is composed of a hot-melt fiber, and a welded portion is formed between the inner side of the two rows of sprocket teeth and the opposite core wire. .

In a preferred embodiment, each of the crimping welds is an ultrasonically pressed weld or a high frequency crimped weld.

1‧‧‧ zipper tape

2‧‧‧Chain row

21‧‧‧ sprocket

22‧‧‧ tooth head

23‧‧‧Upper foot

24‧‧‧Reversal Department

25‧‧‧lower leg

3‧‧‧core

31‧‧‧welding department

4‧‧‧ suture

41‧‧‧annular suture

42‧‧‧Needle

43‧‧‧Pressure welding

5‧‧‧ zipper head

51‧‧‧ Pulling

The first figure is a top view of the line zipper of the preferred embodiment of the present invention; the second figure is a partial enlarged view of the line zipper of the first figure; the third figure is a sectional view of the line zipper of the second figure; the fourth picture is the second picture A cross-sectional view of the longitudinal skein of the line zipper; the fifth figure is a cross-sectional view of the loop stitch and the sprocket of the line zipper of the third figure before being pressed and welded; The sixth figure is a cross-sectional view of the loop stitch and the chain teeth of the line zipper of the fourth figure before crimp welding.

For the purpose of achieving the above objectives, the technical means and its functions, the feasible embodiments are described, and the following description is given with the following diagrams: First, please refer to the first to fourth figures, the spiral tooth type of the creation The line zipper is attached to the adjacent side of the two zipper tapes 1 and has two opposite sprocket rows 2, and the two sprocket rows 2 are respectively arranged by spiral winding of thermoplastic resin lines into a plurality of sprocket teeth 21, and two zipper tapes 1 A slider head 5 and a pull tab 51 are slidably disposed between the two chain rows 2 to reciprocately move the two rows of fastener elements 21.

Referring to the first to sixth figures, the two-chain tooth row 2 of the line zipper may be made of a thermoplastic resin material such as polyamide or polyester, and the two rows of sprocket teeth 21 each have a tooth head 22 which is engaged with each other with opposite sides. An upper leg portion 23 and an opposite lower leg portion 25 are extended from the upper and lower ends of the tooth head 22 toward the other side in the width direction, and the upper leg portion 23 of each of the fastener elements 21 is formed with the opposite portion 24 from the other side to be coupled to the same row of phases. The foot segment 25 is adjacent to the adjacent tooth 21 .

The two-link tooth row 2 has a core wire 3 inserted in each of the fastener elements 21 along the longitudinal direction, and the core wire 3 is made of a heat-fusible fiber such as polyamide or polyester. The two-chain tooth row 2 is disposed on the adjacent side of the two opposite zipper tapes 1, and the two zipper tapes 1 are stitched with the suture 4 along the length direction between the sprocket teeth 21 of the element row 2 (see the 5 and 6), and the suture 4 includes a loop stitch 41 and a needle thread 42 which are colluded with each other to form a loop stitch 41 on the top of the leg section 23 above each of the fastener elements 21, thereby fixing the chains. Tooth 21.

The loop stitch 41 of the original line zipper has polyamine or polyester in whole or in part. Such as hot melt, thermoplastic fiber or synthetic fiber, using a roller type fusion joint (not shown) of a conventional crimping device, pressing the loop stitch 41 on the two rows of fastener elements 21 in an ultrasonic or high-frequency manner The respective annular sutures 41 and the opposite upper leg segments 23 of the two rows of sprocket teeth 21 are melted to each other to form an ultrasonic or high-frequency pressure-welded portion 43 (see FIGS. 3 and 4) to ensure a stable position. The sprocket 21 further increases the meshing strength of the left and right rows of sprocket teeth 21 and its lateral tensile force, thereby preventing the two rows of sprocket teeth 21 from being improperly disengaged, and the meshing action of the two rows of sprocket teeth 21 is more precise and smooth.

In the preferred embodiment shown in the third and fourth figures, the sprocket 21 of the two-chain tooth row 2 can be fused to the loop stitch 41, and the sprocket 21 can be used during the crimp welding process. A welded portion 31 is formed between the inner side and the outer side of the opposite core wire 3 to further improve the stable combined positioning property.

The above embodiments are only used to facilitate the description of the present invention, and are not intended to be limiting, and all kinds of simple changes and modifications that can be made by those skilled in the art without departing from the spirit of the present invention should still be included in the following patent applications. In the scope.

1‧‧‧ zipper tape

2‧‧‧Chain row

21‧‧‧ sprocket

22‧‧‧ tooth head

23‧‧‧Upper foot

24‧‧‧Reversal Department

25‧‧‧lower leg

3‧‧‧core

31‧‧‧welding department

4‧‧‧ suture

41‧‧‧annular suture

42‧‧‧Needle

43‧‧‧Pressure welding

Claims (4)

The utility model relates to a spiral tooth type line zipper, wherein two adjacent chain teeth rows are arranged on adjacent sides of two zipper tapes, and two chain tooth rows are arranged by spiral winding of thermoplastic resin lines into a plurality of chain teeth, two rows of chain teeth Each of the tooth heads having the opposite sides meshing with each other, the upper leg section and the opposite lower leg section extending from the opposite ends of the tooth head toward the other side in the width direction, and the other side of the leg section above each of the fastener elements is formed with an inversion portion coupled to the same row adjacent to each other a lower leg of the sprocket; the two zipper tapes are provided with sutures along the length direction between the sprocket teeth of the sprocket row, so that a loop stitch is respectively bundled on the top of the leg segments above each sprocket; The suture has a hot-melt fiber, and each of the loop stitches on the two rows of fastener elements and the opposite upper leg are melted to form a press-welded portion. The helical toothed line zipper according to claim 1, wherein the two sprocket teeth are inserted into each of the sprocket teeth along a longitudinal direction, and the core wire is composed of a hot-melt fiber inside the two rows of sprocket teeth. A weld portion is formed between the core wires and the opposite core wires. The helical toothed line zipper according to claim 1, wherein each of the crimping and welding portions is an ultrasonic pressure welding portion. The helical toothed line zipper according to claim 1, wherein each of the crimping and welding portions is a high frequency crimping welded portion.