Zipper tape and method of manufacturing the same

Abstract

The present invention relates to a fastener tape (10) for a concealed fastener (1) having a woven fastener tape (20) having a tape main portion (30), a tape double layer portion (40) formed by extending from the tape main portion (30) in a width direction and folding back, and at least a chain-like woven thread (62) included in each longitudinal row forming the tape main portion (30), and a longitudinal row forming the tape double layer portion (40) having at least one wide longitudinal row having a second longitudinal row width greater than a first longitudinal row width of the longitudinal row forming the tape main portion (30). Thus, the tape double layer portion of the fastener tape has excellent flexibility.

Description

Technical Field

[0001] This invention relates to zipper teeth tape for concealed zippers and a method for manufacturing the zipper teeth tape. Background Technology

[0002] An invisible zipper is known to be formed by attaching multiple zipper teeth to the tooth mounting part of a woven zipper tape using sewing yarn. For example, a zipper tooth tape for such an invisible zipper is described in Japanese Patent Publication No. 57-36005 (Patent Document 1).

[0003] For example, such as Figure 5 As shown, the zipper tooth belt 80 for invisible zippers described in Patent Document 1 has a woven zipper belt 81 and spiral zipper teeth 82 installed on the zipper belt 81.

[0004] The zipper tape 81 has a tape body portion 81a and a tape double layer portion 81b that extends from the tape body portion 81a in the width direction and is folded back. The folded-back tape portion of the tape double layer portion 81b becomes the zipper tooth mounting portion of the zipper tape 81, and the zipper teeth 82 are mounted to the zipper tooth mounting portion using sewing yarn (sewing thread) 83.

[0005] In the zipper tape 81 of Patent Document 1, the weave structure of the tape body portion 81a is formed using chain-like braided yarn, warp braided yarn, and weft yarn. The zipper tooth mounting portion has a first longitudinal row W1 formed on the side edge of the tape, and a second longitudinal row W2 and a third longitudinal row W3 formed sequentially from the first longitudinal row W1 toward the tape body portion 81a.

[0006] In Patent Document 1, the first and third warp rows W1 and W3 are formed using chain-knitted yarn, warp-knitted yarn, and weft yarn. The second warp row W2 is formed only by warp-knitted yarn and weft yarn. Therefore, the second warp row W2 is thinner than the other warp rows of the zipper tape 81. That is, the width (dimension in the width direction of the warp row) of the second warp row W2 is smaller compared to the other warp rows. Furthermore, the spacing between the first and second warp rows W1 and the second warp row W2, as well as the spacing between the second and third warp rows W2 and W3, is greater than the spacing between other adjacent warp rows.

[0007] When the zipper teeth 82 are sewn onto the woven zipper tape 81 using a sewing machine as described above, the increased spacing between the first row W1 and the second row W2, as well as between the second row W2 and the third row W3, allows the sewing machine needle to easily pierce these gaps for sewing. This suppresses interference between the sewing machine needle and the zipper teeth 82, and allows the multiple zipper teeth 82 to be stably fixed at predetermined positions on the zipper tape 81 at a certain interval.

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 1: Japanese Statute No. 57-36005 Summary of the Invention

[0011] The problem the invention aims to solve

[0012] For example, conventional concealed zippers, such as the zipper toothed chain 80 described in Patent Document 1, are currently used in various garments. When concealed zippers are used in clothing, they are typically installed at the opening of the garment for easy dressing and undressing. In recent years, to facilitate dressing and undressing, concealed zippers are sometimes installed at the front of garments where the zipper pull can be easily slid.

[0013] However, conventional invisible zippers (zipper teeth) sometimes have a double-layer section in the zipper tape that folds back and overlaps, as described above. Compared to the fabric of the garment to which they are attached, they are less flexible and tend to feel stiff.

[0014] Therefore, when wearing clothing with concealed zippers, the following situations sometimes occur when bending over or sitting in a chair: the area where the concealed zipper is installed may become locally stiff (tightened), forming a bulge (protrusion) that is detached from the body, or a depression that is close to the body between two bulges. If such stiffening, bulges, and depressions occur in the area where the concealed zipper is installed, it can reduce the comfort of wearing the clothing and impair the aesthetics and design of the garment's silhouette.

[0015] The present invention was made in view of the above-mentioned prior art problems, and its object is to provide a concealed zipper tooth belt with improved flexibility in the double-layered portion of a knitted zipper belt equipped with zipper teeth, and a method for manufacturing the zipper tooth belt.

[0016] Solution for solving the problem

[0017] To achieve the above objectives, the zipper tooth tape provided by the present invention is a concealed zipper tooth tape, having a woven zipper tape and a plurality of zipper teeth installed in the tooth mounting portion of the zipper tape using sewing yarn. The zipper tape has a tape body portion and a tape double layer portion formed by extending from the tape body portion along the width direction and folding back. The tooth mounting portion is included in the tape double layer portion. In this zipper tooth tape, each longitudinal row forming the tape body portion contains at least a chain-like braided thread. The longitudinal row forming the tape double layer portion has at least one wide longitudinal row, which has a second longitudinal row width that is larger than the width of the first longitudinal row forming the longitudinal row of the tape body portion.

[0018] In the zipper toothed belt of the present invention, preferably, at least one of the sewing yarns pierces between the wide longitudinal row and the longitudinal row adjacent to the wide longitudinal row in the double-layer portion of the belt.

[0019] Additionally, preferably, the double-layered section of the belt has a first belt section extending from the main body of the belt in the width direction, a belt bend section extending from the first belt section and bending in a U-shape, and a second belt section extending from the belt bend section and overlapping the first belt section, with the wide longitudinal stripe arranged at least in the belt bend section.

[0020] Preferably, when the longitudinal row of the side edge of the double-layer portion formed on the zipper tape is designated as the first longitudinal row, and the longitudinal row that is arranged from the first longitudinal row toward the opposite side edge of the zipper tape as the Nth longitudinal row is designated as the Nth longitudinal row, the double-layer portion is formed by the five longitudinal rows from the first longitudinal row to the fifth longitudinal row, and the second and third longitudinal rows forming the double-layer portion are formed as the wide longitudinal rows.

[0021] Furthermore, in this invention, it is preferred that the main body portion of the belt and the double-layer portion of the belt include warp-knitted yarn and single satin-knitted yarn. The warp-knitted yarn has a first warp-knitted yarn and a second warp-knitted yarn, the second warp-knitted yarn having a higher strength or greater fineness than the first warp-knitted yarn, and a needle-knitted arc is formed in the double-layer portion of the belt. The single satin-knitted yarn has a first single satin-knitted yarn and a second single satin-knitted yarn, the second single satin-knitted yarn having a higher strength or greater fineness than the first single satin-knitted yarn, and a needle-knitted arc is formed in the double-layer portion of the belt.

[0022] Preferably, a braided arc is formed in each row of coils on the side edge of the zipper tape opposite to the double-layer portion of the tape.

[0023] Next, the manufacturing method of the zipper tooth tape provided by the present invention is a method for manufacturing a zipper tooth tape for invisible zippers. The zipper tooth tape has a woven zipper tape and a plurality of zipper teeth installed in a tooth mounting portion of the zipper tape using sewing yarn. The zipper tape has a tape body portion and a tape double-layer portion formed by extending from the tape body portion along the width direction and folding back. The tooth mounting portion is included in the tape double-layer portion. In this manufacturing method, the method includes: weaving the zipper tape, wherein the zipper tape is woven in each longitudinal section forming the tape body portion. It includes at least chain-like braided thread, and at least one of the longitudinal rows forming the double-layer portion of the belt includes water-soluble chain-like braided thread; the plurality of zipper teeth are sewn to the tooth mounting portion of the woven zipper belt by sewing with a sewing machine; and at least one wide longitudinal row having a second longitudinal row width larger than the width of the first longitudinal row forming the main body portion of the belt is formed in the double-layer portion of the belt.

[0024] The preferred manufacturing method of the present invention includes, in the sewing process, piercing at least one of the sewing yarns between a longitudinal row containing the water-soluble chain braid and a longitudinal row adjacent to the longitudinal row containing the water-soluble chain braid in the double-layered portion, thereby sewing the plurality of zipper teeth to the tooth mounting portion.

[0025] The effects of the invention

[0026] According to the present invention, it is possible to provide a concealed zipper tooth tape with a double-layered portion that improves the flexibility of the knitted zipper tape with zipper teeth installed. Attached Figure Description

[0027] Figure 1 This is a schematic cross-sectional view of a concealed zipper tooth strip according to an embodiment of the present invention.

[0028] Figure 2 It means Figure 1 The diagram shows the weave structure of the zipper tape in the zipper teeth.

[0029] Figure 3 This is a diagram showing the weave of the yarns used in the zipper tape.

[0030] Figure 4 It is a diagram showing the weave structure of the zipper tape containing water-soluble braided yarn after it has been woven.

[0031] Figure 5 This is a cross-sectional view of the zipper teeth and straps used in traditional concealed zippers. Detailed Implementation

[0032] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0033] Example

[0034] Figure 1 This is a schematic cross-sectional view of the zipper teeth of the concealed zipper according to this embodiment. Figure 2 It means Figure 1 The diagram shows the weave structure of the zipper tape in the zipper teeth. Figure 3 This is a diagram showing the weave of the yarns used in the zipper tape.

[0035] In the following description, the front-back direction refers to the direction along the length of the zipper tape, and is a straight line in the same direction as the sliding direction of the zipper pull. The left-right direction refers to the direction along the width of the main body of the zipper tape, and is parallel to the tape surface and orthogonal to the tape length direction. The up-down direction refers to the direction along the inside-outside direction of the tape, orthogonal to the tape surface and back side of the main body of the zipper tape, and is orthogonal to both the front-back and left-right directions.

[0036] Regarding the weave structure of the zipper tape, the direction along the length (front-to-back direction) of the zipper tape is defined as the longitudinal direction, and the direction orthogonal to the longitudinal direction is defined as the transverse direction. Furthermore, the transverse direction is parallel to the tape surface along the width direction that holds the zipper tape in a flat shape.

[0037] Figure 1 The concealed zipper 1 shown in this embodiment has a pair of left and right zipper teeth straps 10 and a (not shown) zipper pull that can be slidably mounted on the rows of teeth 11 formed on the left and right zipper teeth straps 10. The zipper pull of this embodiment has a structure that is practically the same as that of zipper pulls commonly used in conventional concealed zippers. Therefore, a detailed description of the zipper pull is omitted in this embodiment.

[0038] Each of the left and right zipper belts 10 has a slender zipper belt 20 woven into a strip shape and a plurality of zipper teeth 12 sewn to the zipper belt 20 using sewing thread (sewing yarn) 18.

[0039] Multiple zipper teeth 12 have a continuous spiral shape along the length of the zipper tape 20, and are formed by winding monofilaments made of thermoplastic resin such as polyamide or polyester into a spiral shape. The multiple spirally continuous zipper teeth 12 are installed along the length of the zipper tape 20 at the tooth mounting portion 21 by double-stitched sewing with sewing yarn 18, thereby forming a tooth row 11.

[0040] like Figure 1As shown, each zipper tooth 12 has an engagement head 13 that engages with a zipper tooth 12 of a meshing object, an upper leg 14 and a lower leg 15 extending from the engagement head 13 in the width direction, and a connecting portion 16 that connects the upper leg 14 (or lower leg 15) of the zipper tooth 12 to the lower leg 15 (or upper leg 14) of the adjacent zipper tooth 12 in the front-back direction. The upper leg 14 and lower leg 15 of the zipper tooth 12 extend in the width direction from the upper end and lower end of the engagement head 13 toward the inside of the belt, respectively. The zipper tooth 12 is fixed to the zipper belt 20 in a position where the upper leg 14 contacts the zipper belt 20 and the lower leg 15 is moved away from the zipper belt 20.

[0041] Each zipper strap 20 on the left and right sides has a warp-knitted structure made of multiple braided threads. For example... Figure 1 and Figure 2 As shown, each zipper tape 20 has a tape body portion 30, a tape double-layer portion 40 formed by extending from one side edge of the tape body portion 30 along the width direction and folding back, and a tape outer edge portion 50 extending from the other side edge of the tape body portion 30 along the width direction. Furthermore, Figure 2 It means Figure 1 Diagram of the double-layered, unfolded (open) woven structure.

[0042] The double-layered section 40 has a first section 41 extending inward from the main body section 30 in the width direction, a section bending 43 extending further from the first section 41 and bending in a U-shape, and a second section 42 extending further from the section bending 43. The first section 41 and the second section 42 overlap each other. Here, "inward" refers to the opposing side edges of the pair of zipper tapes 20 (the direction close to the side edges). The second section 42 of the double-layered section 40 has a tooth mounting portion 21 for sewing zipper teeth 12. The section bending 43 of the double-layered section 40 is configured to contact the section bending 43 of the zipper tape 20 on the engaging side when the concealed zipper 1 is closed (when the left and right rows of teeth 11 are engaged).

[0043] like Figure 2 and Figure 3 As shown, the zipper tape 20 in this embodiment is woven from three types of yarns: warp-knitted yarn 61 (1-2 / 1-0), chain-knitted yarn 62 (0-1 / 1-0), and single-satin knitted yarn 63 (1-0 / 3-4). In this case, the warp-knitted yarn 61 and the single-satin knitted yarn 63 are woven in such a way that the sinker arcs of the warp-knitted yarn 61 and the sinker arcs of the single-satin knitted yarn 63 intersect each other between the rows.

[0044] In this embodiment, the warp-knitted yarn 61, the chain-knitted yarn 62, and the single-satin-knitted yarn 63 have a fineness of 56T (dtex) or more and 167T or less. Furthermore, in this embodiment, the warp-knitted yarn 61 and the single-satin-knitted yarn 63 have the same fineness. Therefore, the zipper tape 20 can be easily woven. Moreover, in this invention, the fineness of each knitted yarn forming the zipper tape 20 is not particularly limited. Additionally, the material of each knitted yarn is not limited. For example, the warp-knitted yarn 61, the chain-knitted yarn 62, and the single-satin-knitted yarn 63 can be multifilament yarns made of polyester, nylon, polypropylene, or acrylic, as used in conventional zipper tapes.

[0045] The zipper tape 20 has 14 columns, from the first column W1 to the fourteenth column W14, extending from one side edge to the other. In this case, the column formed on the side edge of the zipper tape 20 on the double-layer portion 40 side is designated as the first column W1, and from the first column W1 towards the outer edge side, the second column W2 to the fourteenth column W14 are sequentially formed in the transverse direction.

[0046] The double-layer portion 40 of the zipper tape 20 is formed by five longitudinal rows, from the first row W1 to the fifth row W5. The main body portion 30 is formed by five longitudinal rows, from the sixth row W6 to the tenth row W10, and the outer edge portion 50 is formed by four longitudinal rows, from the eleventh row W11 to the fourteenth row W14. Furthermore, in this invention, the number of longitudinal rows forming the zipper tape is not particularly limited, and can be increased or decreased depending on the intended use of the zipper. Additionally, the number of longitudinal rows forming the double-layer portion, the main body portion, and the outer edge portion is also not particularly limited.

[0047] The main body 30 formed by the 6th to 10th columns W6 is a part of the zipper tape 20, such as fabric sewn to clothing. The main body 30 is formed by warp braided threads 61, chain braided threads 62, and single satin braided threads 63.

[0048] In all the warp rows (6th to 10th warp rows W10) forming the main body portion 30, there are needle arcs of warp knitting yarn 61, needle arcs of chain knitting yarn 62, and needle arcs of single satin knitting yarn 63. Particularly in each of the 6th to 9th warp rows W6, three needle arcs of warp knitting yarn 61, chain knitting yarn 62, and single satin knitting yarn 63 are formed in each row. In this case, in each row, the needle arc of chain knitting yarn 62 is formed to tighten the needle arcs of warp knitting yarn 61 and single satin knitting yarn 63 from the outside. Furthermore, in this invention, the knitting structure of the main body portion is not particularly limited as long as chain knitting yarn is included in each warp row.

[0049] In this embodiment, regarding the 6th to 10th columns W10 forming the main body portion 30, the width of one column is defined as the first column width. Here, the column width refers to the maximum value of the width or transverse dimension of the loop formed by one or more needle arcs in that column. Therefore, the first column width can also be described as the maximum value of the width or transverse dimension of the loop formed by the needle arcs of the knitting thread 61, the needle arcs of the chain knitting thread 62, and the needle arcs of the single satin knitting thread 63.

[0050] As described above, the double-layered portion 40 is formed by the first longitudinal row W1 to the fifth longitudinal row W5. In this case, as... Figure 1 As shown, the first row W1 and the second row W2 are disposed on the second belt portion 42, which includes the zipper tooth mounting portion 21 with the double layer portion 40. The third row W3 is disposed on the belt bending portion 43 with the double layer portion 40. The fourth row W4 and the fifth row W5 are disposed on the first belt portion 41 with the double layer portion 40. In addition, the sewing thread 18 that sews the zipper teeth 12 to the zipper tooth mounting portion 21 pierces between the first row W1 and the second row W2, and between the second row W2 and the third row W3 of the double layer portion 40.

[0051] The double-layered section 40 is formed by warp-knitted yarn 61, chain-knitted yarn 62, and single satin-knitted yarn 63. More specifically, in the first warp row W1 formed on the side edge of the belt and the fourth warp row W4 and fifth warp row W5 formed on the first belt section 41 adjacent to the belt body section 30, the stitches of the warp-knitted yarn 61, the chain-knitted yarn 62, and the single satin-knitted yarn 63 are formed in each warp row. In particular, in each of the fourth warp row W4 and the fifth warp row W5, three stitches of the warp-knitted yarn 61, the chain-knitted yarn 62, and the single satin-knitted yarn 63 are formed in each row.

[0052] The second and third warp rows W2 and W3 with the double-layered section 40 are formed by two types of knitting yarns: warp-knitted yarn 61 and single-satin knitted yarn 63. In other words, in the second and third warp rows W2 and W3, there are no chain-knitted loops of yarn 62, but rather two types of knitted loops: warp-knitted yarn 61 and single-satin knitted yarn 63. Furthermore, in the second and third warp rows W2 and W3, loops formed only by knitted loops of yarn 61 and single-satin knitted yarn 63 are alternately formed in the warp direction.

[0053] In the double-layered section 40, in the second and third longitudinal rows W2 and W3 where the needle arc of the chain knitting thread 62 is not present, the needle arc of the warp knitting thread 61 or the needle arc of the warp knitting thread 61 and the single satin knitting thread 63 is not tightened from the outside by the needle arc of the chain knitting thread 62. Therefore, the needle arc of the warp knitting thread 61 or the two needle arcs of the warp knitting thread 61 and the single satin knitting thread 63 are formed to be loose in each row and bulge in the width direction.

[0054] Here, regarding the second and third columns W2 and W3 without the chain-like braided yarn 62 in the double-layered portion 40, the maximum value of the dimension in the width direction or the column direction of the loop formed by one or two needle arcs in each column is defined as the second column width. In particular, in the case of this embodiment, the column width (maximum value in the width direction) of the loop formed by the interlacing of the needle arcs of the warp braided yarn 61 and the needle arcs of the single satin braided yarn 63 is greater than the column width of the loop formed only by the needle arcs of the warp braided yarn 61, but in this embodiment, the column width of the loop formed only by the needle arcs of the warp braided yarn 61 is set as the second column width.

[0055] In this embodiment, since the chain braided yarn 62 is not woven into the second and third longitudinal rows W2 and W3 of the double-layered portion 40 as described above, the width dimension of the coil formed by the needle arc is formed by a wide longitudinal row that is larger than the sixth to tenth longitudinal rows W10 of the main body portion 30.

[0056] That is, the second and third warp rows (wide warp rows) are formed to have a second warp width (the width of the loop formed solely by the needle arcs of the warp-knitted yarn 61) that is larger than the width of the first warp row described above for the sixth to tenth warp rows W10. In this case, the warp width of the loops formed by the interlacing of the needle arcs of the warp-knitted yarn 61 and the single satin knitted yarn 63 in the second and third warp rows W2 and W3 is greater than the warp width of the loops formed solely by the needle arcs of the warp-knitted yarn 61 (the second warp width), and therefore must be greater than the width of the first warp row described above for the sixth to tenth warp rows W10. In addition, in this case, the second warp width of the second and third warp rows W2 and W3 is greater than the warp width of the first, fourth, and fifth warp rows W5 in the double-layered section 40 where the chain-knitted yarn 62 is woven in.

[0057] The second and third warp rows W2 and W3, which have double layers 40, are formed as described above, wide warp rows that do not contain chain-like knitting threads 62 continuously woven along the warp direction. This allows the needle arcs formed in the second and third warp rows W2 and W3 to be relaxed. In other words, by weaving the needle arcs formed in the second and third warp rows W2 and W3 in a relaxed state, the width dimension of the needle arcs is set to be larger.

[0058] In this way, by relaxing the stitches of the second and third warp rows W2 and W3, the elasticity of the double-layered section 40 in the warp direction (length direction) can be improved, thus increasing the softness of the double-layered section 40. Particularly in this embodiment, the second and third warp rows W2, which are wide warp rows, are arranged adjacent to the position where the sewing yarn 18 pierces the double-layered section 40 in the transverse direction. Specifically, the sewing yarn 18 is arranged between the first warp row W1 and the second warp row W2, which is a wide warp row, and between the second and third warp rows W2, which are wide warp rows.

[0059] Furthermore, the third longitudinal row W3 is positioned at the bend 43 of the double-layered section 40, which easily reduces the softness of the zipper tape 20 in the inner and outer directions. The second longitudinal row W2 and the third longitudinal row W3, positioned in such a location (i.e., adjacent to the piercing position of the sewing yarn 18 and / or the bend 43), are formed by wide longitudinal rows, thereby more effectively improving the softness of the double-layered section 40 (especially in the inner and outer directions). By arranging the sewing yarn 18 adjacent to the wide longitudinal row where the stitching has loosened, the sewing yarn can move slightly in response to bending or sitting, thus making it difficult to perceive the stiffness of the invisible zipper 1.

[0060] Here, "sewing yarn 18 arranged adjacent to the wide warp" means that the sewing yarn 18 pierces between the wide warp and the warp adjacent to it. In this case, the sewing yarn 18 may, for example, pierce the double-layered portion between the wide warp and the wide warp adjacent to it, as in the case between the second warp W2 and the third warp W3, or, for example, pierce the double-layered portion between the wide warp and the non-wide warp (warp that is not a wide warp) adjacent to it, as in the case between the first warp W1 and the second warp W2.

[0061] In the double-layered portion 40 of the zipper tape 20, in the first longitudinal row W1 formed on the side edge of the zipper tape 20, loops formed by the interlacing of needle-knitted arcs of warp braided yarn 61 and chain braided yarn 62 and loops formed by the interlacing of needle-knitted arcs of single satin braided yarn 63 and chain braided yarn 62 are alternately formed in the longitudinal direction. This ensures the strength of the side edge of the zipper tape 20 and stabilizes the shape of the zipper tape 20. As a result, the spiral zipper teeth 12 can be stably fixed at a predetermined position in the tooth mounting portion 21 of the zipper tape 20.

[0062] Furthermore, the chain braided thread 62 disposed in the first row W1 has a higher strength than the other chain braided threads 62 disposed in the fourth to tenth rows W10. This further improves the strength of the side edge of the zipper tape 20. Additionally, in this embodiment, the chain braided thread 62 disposed in the first row W1 has the same fineness as the other chain braided threads 62.

[0063] As described above, the outer edge 50 of the zipper tape 20 is formed by four longitudinal rows, from the 11th row W11 to the 14th row W14. Additionally, the side edge of the zipper tape 20 on the outer edge 50 (the 14th row W14) is sometimes referred to as an ear. This outer edge 50 is formed by warp-knitted threads 61 and single-sided satin-knitted threads 63; chain-knitted threads 62 are not present on the outer edge 50.

[0064] In the outer edge portion 50 of this embodiment, in the 11th warp row W11 adjacent to the main body portion 30, two needle arcs of warp-knitted yarn 61 and single satin-knitted yarn 63 are formed in each row. In the 12th warp row W12 adjacent to the outer side of the 11th warp row W11 (the side away from the main body portion 30), loops formed by two needle arcs of warp-knitted yarn 61 and single satin-knitted yarn 63 and loops formed by needle arcs of warp-knitted yarn 61 alone are alternately formed in the warp direction. In the 13th and 14th warp rows W14 located on the outer side of the 12th warp row W12, needle arcs of only warp-knitted yarn 61 and single satin-knitted yarn 63 are formed in each row.

[0065] The outer edge 50 of the tape has a portion in which the proportion of the knitted arcs formed in each longitudinal row decreases in stages toward the outer side of the tape, as described above, thereby improving the softness of the outer edge 50 of the tape. For example, in this embodiment, the outer edge 50 of the tape is formed by the knitted structure described above, thereby improving the softness in the tape width direction and the softness in the tape inside and outside directions.

[0066] Furthermore, in this embodiment, in the 14th longitudinal row W14 formed on the side edge (ear) of the zipper tape 20, a stitched arc of warp-knitted yarn 61 and a stitched arc of single satin-knitted yarn 63 are alternately formed along the longitudinal direction. Thus, each row of the 14th longitudinal row W14 forming the ear is formed with one stitched arc, thereby not only improving the softness of the outer edge 50 of the tape as described above, but also improving the strength of the outer edge 50 of the tape.

[0067] In this embodiment, the warp-knitted yarn 61 woven into the zipper tape 20 has a plurality of first warp-knitted yarns 61a forming needle-knitted arcs in the third to thirteenth warp rows W3 to W13 including the tape body portion 30, and a second warp-knitted yarn 61b having a higher strength than the first warp-knitted yarns 61a. In this embodiment, the second warp-knitted yarn 61b has the same fineness as the first warp-knitted yarns 61a, and has a strength that is 2.0 cN / T or more higher, preferably 5.0 cN / T or more higher than the first warp-knitted yarns 61a. Furthermore, in this invention, the second warp-knitted yarn 61b may also be formed from yarn having a larger fineness than the first warp-knitted yarns 61a instead of having a higher strength than the first warp-knitted yarns 61a, or it may be formed from yarn having both higher strength and a larger fineness than the first warp-knitted yarns 61a.

[0068] The aforementioned second warp yarn 61b is used to form a needle-knitted arc in the second warp row W2 (wide warp row) sandwiched by the sewing yarn 18. Specifically, the second warp yarn 61b is used for warp yarns 61 arranged across the first warp row W1 and the second warp row W2, and for warp yarns 61 arranged across the second warp row W2 and the third warp row W3.

[0069] The single satin knitting thread 63 woven into the zipper tape 20 has a plurality of first single satin knitting threads 63a forming needle arcs in the third to 12th warp rows W12 and the 14th warp row W14, which include the tape body portion 30, and a second single satin knitting thread 63b having a higher strength than the first single satin knitting thread 63a. In this embodiment, the second single satin knitting thread 63b has the same fineness as the first single satin knitting thread 63a, and has a strength that is 2.0 cN / T or more higher, preferably 5.0 cN / T or more higher than the first single satin knitting thread 63a. Furthermore, in this invention, the second single satin braided yarn 63b may also be formed from a yarn having a finer fineness than the first single satin braided yarn 63a instead of having a higher strength than the first single satin braided yarn 63a, or it may be formed from a yarn having a higher strength than the first single satin braided yarn 63a and a finer fineness than the first single satin braided yarn 63a.

[0070] The aforementioned second single satin knitting thread 63b is used to form a single satin knitting arc in the second warp row W2 (wide warp row) sandwiched by sewing yarn 18, and to cross the second warp row W2. Specifically, the second single satin knitting thread 63b is used to form a single satin knitting arc alternately in the warp direction in the first warp row W1 and the fourth warp row W4, and to form a single satin knitting arc alternately in the warp direction in the second warp row W2 and the fifth warp row W5.

[0071] The second warp braided thread 61b and the second single satin braided thread 63b are arranged in the second warp row W2 as described above, thereby improving the strength of the double-layer section 40 (especially the strength of the zipper tooth mounting section 21). Therefore, the zipper teeth 12 can be stably fixed to the zipper tooth mounting section 21. In addition, even with repeated sliding operations of the zipper pull, it is difficult for the double-layer section 40 to break.

[0072] In this embodiment, a second warp-knitted thread 61b with higher strength is also used for the warp-knitted threads 61 arranged across the 13th warp row W13 and the 14th warp row W14. This further enhances the strength of the outer edge 50 of the zipper tape 20.

[0073] The method for manufacturing the zipper tooth belt 10 of this embodiment described above will now be explained.

[0074] First, a warp knitting machine is used to weave the zipper tape 20. The zipper tape 20 woven by this process has chain-like braided threads 62 woven into each warp of the tape body portion 30, and at least one of the warp of the tape double-layer portion 40 has water-soluble chain-like braided threads 65 woven into it. Figure 4 The woven structure shown.

[0075] Specifically, the zipper tape 20 woven using a warp knitting machine... Figure 2 The zipper tape 20 of the zipper tooth tape 10 shown is additionally formed with three water-soluble chain-like braided threads 65 (0-1 / 1-0). In this case, the water-soluble chain-like braided threads 65 are arranged in the second warp row W2 and the third warp row W3 of the zipper tape 20 woven by a warp knitting machine, and in the fourteenth warp row W14 forming the ear portion. In this invention, the water-soluble chain-like braided threads 65 are yarns that have the property of being soluble or dissolving in liquids such as water.

[0076] By using water-soluble chain-like braided yarn 65 as described above to weave the zipper tape 20, the shape of the zipper tape 20 can be stabilized. In particular, the water-soluble chain-like braided yarn 65 in the second warp row W2 and the third warp row W3 tightens the needle arc of the warp knitting yarn 61 from the outside, or tightens both the needle arc of the warp knitting yarn 61 and the needle arc of the single satin knitting yarn 63 from the outside and weaves them into each warp row. As a result, a suitable interval of the same size or approximately the same size as that between the first warp row W1 and the second warp row W2, and between the second warp row W2 and the third warp row W3, is stably provided in the zipper tape 20 woven by the warp knitting machine.

[0077] Next, a sewing machine is used to sew together a plurality of zipper teeth 12 in a spiral continuous pattern on the zipper tape 20 woven by a warp knitting machine. During this sewing process, the sewing machine needle is moved up and down at the intervals between the first longitudinal row W1 and the second longitudinal row W2, and between the second longitudinal row W2 and the third longitudinal row W3, thereby piercing the sewing yarn (sewing thread) 18 at the aforementioned two intervals to form a double-thread lockstitch of the sewing yarn 18. Furthermore, this formed sewing section is used to fix the plurality of zipper teeth 12 to the double-layered portion 40 (the tooth mounting portion 21 of the double-layered portion 40) of the zipper tape 20.

[0078] At this time, the intervals between the first row W1 and the second row W2, and between the second row W2 and the third row W3, are formed to an appropriate size by weaving water-soluble chain-like braided yarn 65 into the second row W2 and the third row W3, respectively, as described above. Therefore, when the sewing machine needle moves up and down, interference from the sewing machine needle into the first row W1 to the third row W3 can be suppressed. As a result, it is difficult to produce defects such as positional deviation of the sewing yarn 18 piercing the zipper tape 20 and the sewing machine needle cutting the braided thread of the zipper tape 20 due to interference from the sewing machine needle.

[0079] As a result, each zipper tooth 12 can be installed at a predetermined position on the zipper tape 20 and at a certain interval along its length. Furthermore, it is possible to suppress any decrease in the strength of the zipper tape 20 (particularly the strength of the tooth mounting portion 21). By performing this sewing process, a zipper tooth belt 1 with the zipper teeth 12 sewn onto the zipper tape 20 is produced.

[0080] Next, the manufactured zipper tooth tape 10 is immersed in, for example, a liquid to dissolve and remove the water-soluble chain braided thread 65 woven into the zipper tape 20. Alternatively, in this embodiment, before dissolving the water-soluble chain braided thread 65, a double-layer portion 40 may be formed on the zipper tape 20 by partially folding back the zipper tooth tape 10, and the shape of the zipper tape 20 may be fixed by heat setting the zipper tooth tape 10 with the double-layer portion 40. Furthermore, this process of fixing the shape of the zipper tape 20 may be performed after the dyeing process described later.

[0081] As an example of a method for dissolving the water-soluble chain braided thread 65 contained in the zipper tape 20, for instance, in a dyeing process for dyeing the zipper tooth tape 10, by immersing the zipper tooth tape 10 in a dyeing solution, the water-soluble chain braided thread 65 can be dissolved in the dyeing solution and removed from the zipper tape 20. In this way, by dissolving and removing the water-soluble chain braided thread 65 located on the outermost side of the arc constituting the longitudinal section from the zipper tape 20, the needle arcs of the warp braided thread 61 and / or the needle arcs of the single satin braided thread 63, which were originally tightened from the outside by the water-soluble chain braided thread 65, can be relaxed and enlarged (bulged).

[0082] As a result, the width of the second and third longitudinal rows W2 and W3 of the zipper tape 20 can be set to be greater than the width of each longitudinal row (first longitudinal row width) of the sixth to tenth longitudinal rows W10 forming the tape body portion 30. Therefore, the second and third longitudinal rows W2 and W3 are formed into wide longitudinal rows with a second longitudinal row width that is larger than the first longitudinal row width. Furthermore, by removing the water-soluble chain braided thread 65 from the zipper tape 20, the thickness of the double-layer portion 40 can be reduced. In addition, in this invention, the method of dissolving and removing the water-soluble chain braided thread 65 contained in the zipper tape 20 is not limited to the dyeing process of immersing the zipper tooth chain tape 10 in a dyeing solution; other processing or treatments can also be used.

[0083] By performing the above procedures, stable manufacturing can be achieved. Figure 1 The concealed zipper 1 shown uses zipper teeth 10.

[0084] Furthermore, by combining the two manufactured zipper chain straps 10 and attaching a zipper pull (not shown) to the chain tooth row 11 of the combined pair of zipper chain straps 10 in a slidable manner, a zipper is manufactured. Figure 1 The invisible zipper 1 shown in this embodiment.

[0085] According to the concealed zipper 1 of this embodiment manufactured as described above, since the double-layer portion 40 of the zipper tape 20 includes a wide longitudinal row, which, as described above, does not have chain-like braided threads 62 continuously woven in the longitudinal direction, the flexibility of the zipper tape 20 (especially the double-layer portion 40 of the zipper tape 20) can be improved. Furthermore, in this embodiment, since the second longitudinal row W2 and the third longitudinal row W3 disposed in the double-layer portion 40 of the zipper tape 20 are formed as wide longitudinal rows with a large longitudinal width, each zipper tooth tape 10 on the left and right sides has a high elasticity relative to the longitudinal direction (length direction) and has excellent flexibility that makes it easy to bend the zipper tape 20 in the inner and outer directions.

[0086] Therefore, when the concealed zipper 1 of this embodiment is installed on, for example, the front of a garment, it can prevent the formation of hardened portions (stiffening portions), bulges that are far from the body, and recesses that are close to the body between two bulges in the area of ​​the garment where the concealed zipper 1 is installed, as is the case with conventional concealed zippers, when the wearer bends over or sits in a chair. Thus, by using the concealed zipper 1 of this embodiment, it is possible to suppress the decrease in wearing comfort of garments with concealed zippers 1 installed, and also to prevent damage to the aesthetics and design of the garment's silhouette.

[0087] Furthermore, in the concealed zipper 1 of this embodiment, as described above, in the 14th longitudinal row W14 of the side edge (ear) formed on the outer edge 50 side of the zipper tape 20, a needle-knitted arc of warp-knitted thread 61 and a needle-knitted arc of single satin-knitted thread 63 are alternately formed along the longitudinal direction. Therefore, the outer edge 50 of the zipper tape 20 can ensure appropriate strength and improve the flexibility of the outer edge 50.

[0088] Therefore, even if the covering portion of the garment with the concealed zipper 1 is curved to the left or right relative to the length direction of the zipper tape 20, the concealed zipper 1 of this embodiment can be bent in a manner that follows the shape of the covering portion of the garment, and can be stably sewn to the covering portion. Furthermore, even if the concealed zipper 1 is installed on the covering portion of the garment in a curved state, wrinkles and wavy uneven portions on the zipper tape 20 of the concealed zipper 1 can be suppressed. Therefore, a garment with the concealed zipper 1 sewn on can be aesthetically pleasing.

[0089] Furthermore, the present invention is not limited to the embodiments described above. Various modifications can be made as long as the invention has the same structure and achieves the same effect.

[0090] For example, in the above embodiments, such as Figure 2 As shown, the second and third longitudinal rows W2 and W3 of the first to fifth longitudinal rows W5 forming the double-layered portion 40 of the zipper tape 20 are wide longitudinal rows without the chain braided lines 62. However, in this invention, at least one of the first to fifth longitudinal rows W1 to W5 forming the double-layered portion 40 may be formed as a wide longitudinal row without the chain braided lines 62.

[0091] For example, in this invention, only the second longitudinal row W2 among the first longitudinal rows W1 to the fifth longitudinal rows W5 may be formed as a wide longitudinal row without the chain braided yarn 62, or all longitudinal rows among the first longitudinal rows W1 to the fifth longitudinal rows W5 may be formed as wide longitudinal rows without the chain braided yarn 62. In this case, by increasing the number of wide longitudinal rows formed on the double-layer portion 40, flexibility can be improved, but it is also considered that it may lead to a reduction in the strength of the double-layer portion 40. Therefore, the wide longitudinal rows are preferably formed on both the second longitudinal row W2 and the third longitudinal row W3 among the first longitudinal rows W1 to the fifth longitudinal rows W5, as in the embodiment described above.

[0092] Furthermore, the zipper tape 20 of the above embodiment is formed from three types of weaving threads: warp-knitted thread 61, chain-knitted thread 62, and single satin-knitted thread 63. However, in this invention, weft threads can be used instead of single satin-knitted thread 63 to form the zipper tape. That is, the zipper tape of this invention can also be formed from warp-knitted thread 61, chain-knitted thread 62, and weft threads. In this case, in the zipper tape 20 of the embodiment formed from the above-mentioned warp-knitted thread 61, chain-knitted thread 62, and single satin-knitted thread 63, since the single satin-knitted thread 63 forms a needle-knitted arc and is woven in, for example, compared to the zipper tape formed by using weft threads instead of single satin-knitted thread 63, it is easier to produce deformation of the needle-knitted arc. As a result, the flexibility of the zipper tape 20 can be further improved.

[0093] Explanation of reference numerals in the attached figures

[0094] 1. Invisible zipper; 10. Zipper tooth belt; 11. Zipper tooth row; 12. Zipper tooth; 13. Engaging head; 14. Upper leg; 15. Lower leg; 16. Connecting part; 18. Sewing thread; 20. Zipper belt; 21. Zipper tooth mounting part; 30. Belt body; 40. Belt double layer; 41. First belt part; 42. Second belt part; 43. Belt bend part; 50. Belt outer edge; 61. Warp braided thread; 61a. First warp braided thread; 61b. Second warp braided thread; 62. Chain braided thread; 63. Single satin braided thread; 63a. First single satin braided thread; 63b. Second single satin braided thread; 65. Water-soluble chain braided thread; W1~W14. First to fourteenth warp rows.

Claims

1. A zipper tooth tape (10) for an invisible zipper (1), having a woven zipper tape (20) and a plurality of zipper teeth (12) mounted on a tooth mounting portion (21) of the zipper tape (20) by means of sewing yarn (18), the zipper tape (20) having a tape body portion (30) and a tape double layer portion (40) formed by extending from the tape body portion (30) in the width direction and folding back, wherein the tooth mounting portion (21) is included in the tape double layer portion (40). The zipper tooth tape is characterized by, Each longitudinal row forming the main body (30) contains at least chain-like braided lines (62). The longitudinal rows forming the double-layered portion (40) have at least one wide longitudinal row, which has a second longitudinal row width that is larger than the width of the first longitudinal row forming the main body portion (30). The wide longitudinal row is formed as a needle-knitted arc without chain-like braided yarn.

2. The zipper tooth tape according to claim 1, wherein, At least one of the sewing yarns (18) pierces between the wide warp and the warp adjacent to the wide warp in the double-layered portion (40).

3. The zipper tooth tape according to claim 1 or 2, wherein, The double-layered section (40) has a first section (41) extending from the main section (30) in the width direction, a section (43) extending from the first section (41) and bending in a U-shape, and a second section (42) extending from the section (43) and overlapping the first section (41). The wide longitudinal row is provided at least in the bent portion (43).

4. The zipper tooth tape according to claim 1 or 2, wherein, When the longitudinal row of the side edge of the double-layer portion (40) formed on the zipper tape (20) is designated as the first longitudinal row (W1), and the longitudinal row from the first longitudinal row (W1) toward the opposite side of the zipper tape (20) is designated as the Nth longitudinal row, the double-layer portion (40) is formed by the five longitudinal rows from the first longitudinal row (W1) to the fifth longitudinal row (W5). The second longitudinal row (W2) and the third longitudinal row (W3) forming the double-layered portion (40) are formed as the wide longitudinal row.

5. The zipper tooth tape according to claim 1 or 2, wherein, The main body (30) and the double-layer (40) of the belt contain warp-knitted yarn (61) and single satin-knitted yarn (63). The warp-knitted yarn (61) has a first warp-knitted yarn (61a) and a second warp-knitted yarn (61b), the second warp-knitted yarn (61b) having higher strength or greater fineness than the first warp-knitted yarn (61a), and having a needle-knitted arc formed in the double-layer portion (40). The single satin braided yarn (63) has a first single satin braided yarn (63a) and a second single satin braided yarn (63b), the second single satin braided yarn (63b) having a higher strength or greater fineness than the first single satin braided yarn (63a), and forming a needle-knitted arc in the double-layer portion (40).

6. The zipper tooth tape according to claim 1 or 2, wherein, A needle-knit arc is formed in each of the longitudinal rows of the side edge of the zipper tape (20) opposite to the double-layer portion (40).

7. A method for manufacturing a zipper tooth tape, which is a method for manufacturing a zipper tooth tape (10) for an invisible zipper (1), the zipper tooth tape (10) having a woven zipper tape (20) and a plurality of zipper teeth (12) installed in a tooth mounting portion (21) of the zipper tape (20) by means of sewing yarn (18), the zipper tape (20) having a tape body portion (30) and a tape double layer portion (40) formed by extending from the tape body portion (30) in the width direction and folding back, the tooth mounting portion (21) being included in the tape double layer portion (40). The manufacturing method is characterized by including: The zipper tape (20) is woven in such a way that each longitudinal row forming the main body portion (30) contains at least chain braided threads (62), and at least one longitudinal row forming the double layer portion (40) contains water-soluble chain braided threads (65). By using a sewing machine, the plurality of zipper teeth (12) are sewn to the tooth mounting portion (21) of the woven zipper tape (20); and By dissolving and removing the water-soluble chain braided thread (65) of the zipper tape (20) with the plurality of zipper teeth (12) sewn on, at least one wide longitudinal section with a second longitudinal section width that is larger than the width of the first longitudinal section that forms the longitudinal section of the tape body (30) is formed in the double layer portion (40).

8. The method for manufacturing zipper teeth according to claim 7, wherein, The sewing process includes: in the double-layered portion (40), piercing at least one of the sewing yarns (18) between the longitudinal row containing the water-soluble chain braided thread (65) and the longitudinal row adjacent to the longitudinal row containing the water-soluble chain braided thread (65), thereby sewing the plurality of zipper teeth (12) to the tooth mounting portion (21).

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