Fastener tape and fastener stringer

Abstract

The fastener tape (3) includes a warp-knitted tape base fabric (33) having a side edge portion (38) extending in the warp direction, and at least one core thread (51, 52, 53) inserted as a warp into the side edge portion (38) of the tape base fabric (33). The at least one core wire (51, 52, 53) is fixed to a side edge portion (38) of the tape base cloth (33) by at least one fastening yarn (61, 62). The side edge portion (38) includes a first wale (W1) positioned further toward the outside of the tape than the center (CP) of the core wires (51, 52, 53), and a second wale (W2) positioned further toward the inside of the tape than the center (CP) of the core wires (51, 52, 53). The fastening yarns (61, 62) include a predetermined fastening yarn (61), and the fastening yarns (61, 62) are repeatedly turned over without forming a coil in the first wale (W1), and a coil around which a ground yarn with a base fabric (33) is wound is formed in the second wale (W2).

Description

Technical Field

[0001] The invention relates to a zipper tape and a zipper chain tape. Background Art

[0002] Patent Document 1 discloses a method for matching the center of the core thread with the thickness of the knitted fabric by utilizing the tension difference between the single-bar warp pile weave (single code) and the double-bar warp plain weave (tricot) yarn (see pages 4, lines 4 to 10 and 11 of the document). Figure 2 to Figure 4 ).

[0003] Patent Document 2 discloses fixing the core body by ground weft yarns and fastening weft yarns (see the Figure 1 , Figure 2 ).

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Utility Model Publication No. 55-148409

[0007] Patent Document 2: Japanese Patent Publication No. 54-21781 Summary of the invention

[0008] In the case of Patent Document 1, a sufficient tension difference is obtained by combining a single-bar warp pile structure and a double-bar warp plain structure yarn. However, in this case, in the wale located outside the tape relative to the core yarn, the ground structure is strongly pulled by the coil of the double-bar warp plain structure yarn, and there is a concern that the wale partially (although slightly) protrudes outside the tape relative to the core yarn. If such protrusion occurs, there is a concern that the mounting strength of the fastener element relative to the core yarn of the fastener tape is reduced.

[0009] The inventors of the present application have newly discovered problems that may occur when a double-bar plain weave yarn is used as a fastening yarn as described above.

[0010] A zipper tape of one embodiment of the present disclosure includes: a warp-knitted tape base fabric having a side edge portion extending in the warp direction; and at least one core thread inserted into the side edge portion of the tape base fabric as a warp yarn. The at least one core thread is fixed to the side edge portion of the tape base fabric by at least one fastening yarn. The side edge portion includes a first longitudinal row of coils located outside the tape relative to the center of the at least one core thread, and a second longitudinal row of coils located inside the tape relative to the center of the at least one core thread. The at least one fastening yarn includes a specified fastening yarn, and the specified fastening yarn repeatedly performs the following actions, namely, flipping without forming a coil in the first longitudinal row of coils, and forming a coil for the ground yarn of the tape base fabric to be wound around in the second longitudinal row of coils.

[0011] In some embodiments, the at least one core thread includes a first core thread and a second core thread that are separately woven. The at least one fastening yarn includes a first fastening yarn for the first core thread and a second fastening yarn for the second core thread. The first fastening yarn may be the specified fastening yarn. The second fastening yarn may be a weft insertion yarn that repeatedly performs an action of flipping without forming a loop in both the first longitudinal row of coils and other longitudinal rows of coils other than the first longitudinal row of coils and swings. The other longitudinal rows of coils may be longitudinal rows of coils that are located on the inner side of the band compared to the second longitudinal row of coils. Additionally or alternatively, the swing amplitude of the second fastening yarn is larger than the swing amplitude of the first fastening yarn. Additionally or alternatively, in the first longitudinal row of coils, the flipping portion of the first fastening yarn and the flipping portion of the second fastening yarn are alternately formed in the warp direction.

[0012] In some embodiments, no other loops are formed in the first wale except for the loops formed by the ground yarn with the base fabric; and / or,

[0013] The first wale is the outermost wale in the fastener tape; and / or

[0014] The fastener tape has a sunken arc surface and a knitted arc surface on the opposite side of the sunken arc surface, and the predetermined fastening yarn contacts the at least one core thread on the sunken arc surface side and repeatedly crosses the at least one core thread on the sunken arc surface side.

[0015] In some embodiments, the base fabric includes a plurality of chain strips and a plurality of weft insertion yarns that swing with a swing amplitude between different wales so as to connect the plurality of chain strips. In the first wale, the turning portion of the predetermined fastening yarn can cross the chain yarn of the chain strip and be held by the chain yarn.

[0016] The spacing of the fastening yarns viewed along the at least one core thread may be smaller than the spacing of the fastener elements relative to the fastener tape.

[0017] Any combination of the above-mentioned main features and dependent features is within the scope of the disclosure of this application.

[0018] Effects of the Invention

[0019] According to one aspect of the present invention, it is possible to avoid or suppress a decrease in the attachment strength of the fastener element to the side edge portion of the warp knitted tape base fabric with a core thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of a zipper according to one form of the present invention.

[0021] Figure 2It is a schematic diagram showing the schematic structure of the side edge portion of the fastener tape in the thickness direction and the schematic structure of the fastener elements.

[0022] Figure 3 It is a schematic diagram showing the engagement state of the fastener elements, and also shows the state in which the core thread is fixed to the tape base fabric by the fastening yarn at the side edge of the fastener tape.

[0023] Figure 4 This is a schematic structural diagram showing a state in which the first core yarn and the second core yarn are fixed to the base fabric by the first fastening yarn (1 / 2 double-bar warp plain weave yarn) and the second fastening yarn (weft insertion yarn) (in addition, the weft insertion yarn of the base fabric is omitted). For the convenience of illustration, the chain structure is shown with dotted lines.

[0024] Figure 5 It is a schematic structural diagram showing a state where the first core yarn is fixed between the first fastening yarn (1 / 2 double bar warp plain weave yarn) and the tape base fabric (for example, its weft insertion yarn) (in addition, the second fastening yarn is omitted from illustration).

[0025] Figure 6 This is a schematic structural diagram showing a state in which the second core yarn is fixed between the second fastening yarn (weft insertion yarn) and the tape base fabric (for example, its weft insertion yarn) (in addition, illustration of the first fastening yarn is omitted).

[0026] Figure 7 It is a reference diagram showing the structure of the side edge portion of the fastener tape according to one embodiment of the present disclosure (in addition, illustration of the second fastening yarn is omitted).

[0027] Figure 8 This is a schematic diagram showing a state where one core thread is fixed to a tape base fabric using a first fastening yarn and a second fastening yarn.

[0028] Fig. 9 This is a schematic diagram showing a modified example in which the second fastening yarn is also a 1 / 2 double bar warp plain weave yarn in addition to the first fastening yarn. DETAILED DESCRIPTION

[0029] Hereinafter, non-limiting embodiments and features of the present invention will be described with reference to the accompanying drawings. A person skilled in the art will be able to combine the various embodiments and / or features without further explanation, and will also be able to understand the complementary effects based on the combination. In principle, repeated descriptions between the embodiments will be omitted. The drawings are mainly used for the purpose of describing the invention, and are simplified for the convenience of drawing. Each feature should be understood as a general feature that is not only effective for the zipper tape disclosed in this specification, but also common to various other zipper tapes not described in this specification.

[0030] In the present specification, there are cases where descriptions are made with reference to terms indicating directions such as the front-to-back direction, the left-to-right direction, and the up-to-down direction. The front-to-back direction is consistent with the moving direction of the slider 9 used to open and close the zipper 1, and is consistent with the length direction of the zipper 1 (or, the zipper tape 2 or the zipper tape 3). The left-to-right direction is a direction orthogonal to the front-to-back direction, and is consistent with the width direction of the zipper 1 (or, the zipper tape 2 or the zipper tape 3). The up-to-down direction is a direction orthogonal to the front-to-back direction and the left-to-right direction, and is consistent with the thickness direction of the zipper tape 3. Of course, the up-to-down direction does not need to be consistent with the vertical direction (direction of gravity). That is, the terms indicating directions referred to in the present specification are understood with reference to the zipper 1 and have nothing to do with the vertical direction (direction of gravity).

[0031] Reference Figures 1 to 3 The structure of the slide fastener 1 will be described. Figure 1 The slide fastener 1 is shown, and the left and right fastener stringers 2 are engaged at the rear portion thereof and are disengaged at the front portion thereof. Figure 2 In one fastener stringer 2, a schematic structure of a side edge portion of a fastener tape 3 in the thickness direction and a schematic structure of fastener elements 4 attached to the side edge portion are shown. Figure 3 The engaging state of the left and right fastener elements 4 is shown, and in particular, the state in which the first core thread 51 is fastened to the tape base fabric 33 by the first fastening yarn 61 is shown.

[0032] The zipper 1 is a flexible long strip member with a substantially constant width on the left and right sides and extending in a long dimension in the front-back direction (the same applies to the zipper tape 2 and the zipper tape 3). The zipper 1 has: a pair of left and right zipper tapes 2 each including a zipper tape 3 and a zipper element 4; and a slider 9 for engaging and disengaging these zipper tapes 2. Each of the left and right zipper tapes 3 has: a warp-knitted tape base fabric 33 having a side edge portion 38 extending in the warp direction; and at least one core thread inserted as a warp yarn into the side edge portion 38 of the tape base fabric 33. The tape base fabric 33 is divided into a main body portion 37 for attaching the zipper 1 to an article, and a side edge portion 38 to which the zipper element 4 is attached. At least one core thread is inserted between adjacent longitudinal rows of coils in the side edge portion 38 of the tape base fabric 33 as described later. By providing the core thread in the side edge portion 38 of the tape base fabric 33, the mounting strength of the zipper element 4 relative to the zipper tape 3 is improved.

[0033] If the slider 9 moves forward, the left and right zipper elements 4 engage with each other, and the left and right zipper tapes 2 engage (within the range where the left and right zipper elements 4 engage with each other). If the slider 9 moves backward, the left and right zipper elements 4 are disengaged, and the left and right zipper tapes 2 become disengaged (within the range where the left and right zipper elements 4 are disengaged from each other). In addition, the illustrated zipper 1 has a front stop and a rear stop, but both can be omitted. Whether the left and right zipper elements 4 can be completely separated generally depends on the presence or absence of a rear stop or the type of the rear stop. The slider 9 is typically made of metal or resin, but is not limited to these materials.

[0034] The tape base fabric 33 has a first tape surface 31 and a second tape surface 32 on the opposite side of the first tape surface 31, and has a thickness defined thereby (for example, see Figure 2 ). The tape base fabric 33 is formed of a knitted fabric and therefore has higher elasticity in the warp direction (front-back direction) than a woven fabric. Advantageously, the first tape surface 31 includes a sinking arc surface in its entirety or in a portion thereof (for example, limited to the range of the side edge portion 38), and the second tape surface 32 includes a needle knitting arc surface in its entirety or in a portion thereof (for example, limited to the range of the side edge portion 38). In this case, a single needle bed Raschel warp knitting machine or a crochet machine can be used as a warp knitting machine, and the productivity of the zipper tape 3 is improved.

[0035] The base fabric 33 can include various weaving structures. In some cases, the base fabric 33 includes a plurality of chain strips that form individual wales, and a plurality of weft insertion yarns that swing in a swing range between different wales in a manner that connects the plurality of chain strips (see Figures 5 to 7 The number of wales included in the tape base fabric 33 can be set arbitrarily. For example, the tape base fabric 33 includes N wales W1 to W2. n Typically, N and n represent natural numbers greater than 5. The number of weft insertion yarns inserted into the tape base fabric 33 can also be adjusted arbitrarily. The swing amplitudes of the respective weft insertion yarns can be set equal, but are not necessarily limited thereto.

[0036] At least one core yarn (for example, see Figure 2 and Figure 3 ). At least one core thread is fixed to the side edge 38 of the base fabric 33 by at least one fastening yarn. It is also possible to insert two core threads (for example, Figure 2 The first core wire 51 and the second core wire 52 shown in the figure are connected by two separate fastening yarns (for example, Figure 2The two core yarns are fixed to the opposite sides of the tape base fabric 33 (i.e., the first tape surface 31 and the second tape surface 32) by the first fastening yarn 61 and the second fastening yarn 62 shown in the figure. The two core yarns are directly stacked in the thickness direction of the fastener tape 3, or are stacked via the weft inserted yarn of the tape base fabric 33. The thickness and material of the two core yarns may be the same or different.

[0037] If you refer to Figure 2 More specifically, the side edge portion 38 of the tape base fabric 33 includes a first wale W1 located outside the tape relative to the center CP of at least one core yarn 5, and a second wale W2 located inside the tape relative to the center CP of at least one core yarn 5. A total of two core yarns, namely, a first core yarn 51 and a second core yarn 52, are inserted between the first wale W1 and the second wale W2. The first core yarn 51 is bounded between the first wale W1 and the second wale W2 by the first fastening yarn 61 on the first tape surface 31 side. The second core yarn 52 is bounded between the first wale W1 and the second wale W2 by the second fastening yarn 62 on the second tape surface 32 side. Furthermore, the first core yarn 51 and the second core yarn 52 are respectively inserted as warp yarns between the first wale W1 and the second wale W2 when weaving the tape base fabric 33 , and are fixed to the tape base fabric 33 by the first fastening yarn 61 and the second fastening yarn 62 .

[0038] The first wale W1 is located outside the tape relative to the center CP of the core yarn 5 (for example, the center CP of the first core yarn 51 and the second core yarn 52), and is typically located at the outermost side of the tape in the row direction (i.e., the end in the row direction). The second wale W2 is located inside the tape relative to the center CP of the core yarn 5 (for example, the center CP of the first core yarn 51 and the second core yarn 52), and is typically adjacent to the wale located at the outermost side of the tape in the row direction. In addition, the outside of the tape refers to the direction from a point (or position) on any one of the first tape surface 31 and the second tape surface 32 that define the thickness of the fastener tape 3, intersecting (typically orthogonal) with the side edge 38 of the tape base fabric 33 and heading toward the point (or position) outside the surface. The inside of the tape is the direction toward the opposite side of the outside of the tape.

[0039] When there is a ground yarn with a base fabric 33 (for example, the above-mentioned weft insertion yarn) between the first core yarn 51 and the second core yarn 52, the first core yarn 51 is sandwiched between the ground yarn with the base fabric 33 and the first fastening yarn 61 and is held. The second core yarn 52 is sandwiched between the ground yarn with the base fabric 33 and the second fastening yarn 62 and is held. In addition, the ground yarn with the base fabric 33 may be a weft insertion yarn that swings between the first wale and the wale other than the first wale in order to support the core yarn. When there is no ground yarn with a base fabric 33 between the first core yarn 51 and the second core yarn 52, the first core yarn 51 and the second core yarn 52 are in direct contact with each other up and down, and the contact is continuous in the warp direction. The first core yarn 51 and the second core yarn 52 are compressed between the first fastening yarn 61 and the second fastening yarn 62.

[0040] The fastener element 4 may be a metal or resin element attached to the core wire provided on the side edge portion 38 of the tape base fabric 33 (see Figure 2 The zipper element 4 may include a mounting base 41 fixed to the core wire provided on the side edge 38 of the tape base fabric 33, and a snap-fitting portion 42 protruding from the mounting base 41 to the outside of the tape. When the zipper element 4 is a resin element, the zipper element 4 includes a mounting base, a neck, and a snap-fitting head in order toward the outside of the tape, and the mounting base is fixed to the side edge 38 and the core wire of the tape base fabric 33.

[0041] The mounting base 41 may have a first leg 41p and a second leg 41q for sandwiching the zipper tape 3 in the thickness direction thereof. Between the first leg 41p and the second leg 41q, the core wire (for example, the first core wire 51 and the second core wire 52) is compressed in the tape thickness direction. The first leg 41p and the second leg 41q extend from the engaging portion 42 to the inside of the tape, respectively, and cross-section the first core wire 51 and the second core wire 52, and locking protrusions 41r and 41s are provided at their top ends. The locking protrusions 41r and 41s protrude in a manner close to each other in the tape thickness direction, thereby forming an opening 41j for sandwiching the tape base fabric 33 therebetween.

[0042] The engaging portion 42 has an engaging recess 42m and an engaging protrusion 42n, and the engaging recess 42m and the engaging protrusion 42n are arranged on the same axis at a position away from the side edge 38 of the belt base fabric 33 toward the outside of the belt and in a direction parallel to the side edge 38 (see Figure 1 and Figure 3 ). When the left and right zipper elements 4 are engaged, the engagement protrusion 42n of the zipper element 4 on the other side enters the engagement recess 42m of the zipper element 4 on one side and engages. Such engagement of the zipper elements 4 is repeated in the front-to-back direction, so that the left and right zipper stringers 2 are engaged and closed. In addition, the method of forming engagement protrusions on the front and back surfaces of the engagement portion 42 is also within the scope of imagination.

[0043] The holding portion 41k of the fastener element 4 is formed by the first leg portion 41p, the second leg portion 41q, and the engaging portion 42, thereby holding the core thread (for example, the first core thread 51 and the second core thread 52) provided on the side edge portion 38 of the tape base fabric 33. The holding portion 41k is defined by at least the inner wall surface of the first leg portion 41p, the inner wall surface of the second leg portion 41q, and the inner wall surface 42e of the engaging portion 42 extending in the vertical direction to connect these inner wall surfaces. The inner wall surface of the first leg portion 41p is opposite to or in contact with the first tape surface 31. The inner wall surface of the second leg portion 41q is opposite to or in contact with the second tape surface 32. The inner wall surface 42e of the engaging portion 42 extends in the tape thickness direction and faces the opening 41j (actually, completely or substantially occupied by the fastener tape 3) between the locking protrusions 41r and 41s. The first core wire 51 is arranged between the locking protrusion 41r and the inner wall surface 42e and is pressed. Similarly, the second core wire 52 is arranged between the locking protrusion 41s and the inner wall surface 42e and is pressed. Figure 2 In FIG. 1 , a gap is depicted between the holding portion 41 k and the side edge portion 38 of the tape base fabric 33 , but it should be noted that the fastener element 4 is attached with substantially no gap or almost no gap.

[0044] like Figure 3 As shown, the first wale W1 of the tape base fabric 33 may protrude to the outside of the tape compared to the core thread (for example, the first core thread 51 or the second core thread 52). It is not desirable that the first wale W1 protrude to a large extent to the outside of the tape. The reason for this is that the zipper element 4 is usually designed without considering the extent to which the first wale W1 protrudes to the outside of the tape, and there is a concern that the mounting strength of the zipper element 4 relative to the zipper tape 3 is reduced due to the contact between the inner wall surface 42e of the engaging portion 42 and the first wale W1.

[0045] In the present disclosure, at least one core thread is fixed to the side edge of the belt base fabric by at least one fastening yarn. The at least one fastening yarn includes a predetermined fastening yarn (refer to Figure 4 The first tightening yarn 61 of the belt is repeatedly performed such that a loop is not formed in the first wale W1 and the yarn is turned over, and a loop around which the ground yarn of the belt base fabric is wound is formed in the second wale W2. As a result, the range and / or degree of the first wale W1 extending outward from the first core thread 51 is suppressed. In addition, since the tightening yarn forms a loop around which the ground yarn of the belt base fabric is wound in the second wale W2, the tightening yarn can also be suppressed from fraying. In addition, in this specification, there is a case where the specified tightening yarn is referred to as only 1 / 2 double-bar warp plain weave yarn. Generally, double-bar warp plain weave yarn forms a loop at one end of its swing amplitude and also forms a loop at the other end. 1 / 2 double-bar warp plain weave yarn forms a loop at one end of its swing amplitude and does not form a loop at the other end. Therefore, "1 / 2" is added before "double-bar warp plain weave" to distinguish the two.

[0046] like Figure 4 and Figure 5 As shown, the first fastening yarn 61 does not form a loop around which the ground yarn of the tape base fabric 33 is wound in the first wale W1, so the ground yarn of the first wale W1 (for example, the chaining yarn shown in the figure) is not strongly pulled by the first fastening yarn 61. As a result, it is possible to suppress the local generation of a concave portion that is concave toward the inside of the tape in the first wale W1 and the local generation of an extended portion that extends toward the outside of the tape due to its reaction. In this way, it is possible to suppress the reduction in the mounting strength of the fastener element 4 to the fastener tape 3. In addition, the first fastening yarn 61 does not form a loop in the first wale W1, but is pressed toward the first wale W1 by the ground yarn (for example, the chaining yarn shown in the figure) that forms the first wale W1, so it can function as a fastening yarn.

[0047] Furthermore, the first fastening yarn 61 swings between the first wale W1 and the second wale W2 across the first core yarn 51 in the course direction. At this time, the first fastening yarn 61 forms a reversing portion 611 in the first wale W1 and forms a loop 612 in the second wale W2. The reversing portion 611 does not include a loop around which the ground yarn of the tape base fabric 33 is wound, and crosses the braiding yarn of the first wale W1 at two locations, and is held by these braiding yarns. The loop 612 forms a loop (specifically, an open loop) bundled with the loop of the braiding yarn in the second wale W2, and the braiding yarn is wound around the loop 612. The braiding yarn is wound around the loop 612 of the first fastening yarn 61 at a portion where it is wound around the previous or preceding loop (i.e., the loop directly adjacent to the rear of the predetermined loop) after a certain loop (prescribed loop) is formed.

[0048] Alternatively, no loops other than the loops formed by the ground yarn (e.g., plaiting yarn) with the base fabric 33 may be formed in the first wale W1. For this purpose, the second fastening yarn 62 may be a weft insertion yarn that repeatedly performs an action of flipping without forming loops in both the first wale W1 and the wales other than the first wale W1. Figure 4 and Figure 6 In the case of , the second fastening yarn 62 is a weft insertion yarn that repeatedly performs the following actions to swing, that is, it turns over without forming a loop in the first wale W1, and turns over without forming a loop in the third wale W3. Specifically, in the first wale W1, each turning portion 621 of the second fastening yarn 62 crosses the braiding yarn of the first wale W1 at two locations and is held by these braiding yarns. In the third wale W3, each turning portion 621 of the second fastening yarn 62 crosses the braiding yarn of the third wale W3 at two locations and is held by these braiding yarns. In the second wale W2, the second fastening yarn 62 crosses the braiding yarn of the second wale W2 and is held.

[0049] The swing amplitude of the second fastening yarn 62 may be larger than the swing amplitude of the first fastening yarn 61. For example, the first fastening yarn 61 swings with a swing amplitude equal to the width of the first wale W1 and the second wale W2, and the second fastening yarn 62 swings with a swing amplitude equal to the width of the wale (in the range of 1.5 to 2.5 mm) larger than the first wale W1. Figure 4 The sling 9 is swung with a swing amplitude equal to that of the sling 9 (where the width corresponds to three wales). As a result, it is possible to avoid the yarn density of the second wale W2 in which the first fastening yarn 61 forms a loop becoming relatively high and relatively hard. In addition, by forming the turning portion 621 of the second fastening yarn 62 in the wale (for example, the third wale) away from the second wale W2 toward the inside of the tape, it is possible to improve the resistance to sliding friction with respect to the slider 9. Furthermore, in the first wale W1, if the turning portion 611 of the first fastening yarn 61 and the turning portion 621 of the second fastening yarn 62 are formed alternately in the warp direction, it is possible to suppress the thickness variation of the first wale W1 in the warp direction. In addition, by not providing a row of loops in which only the ground yarn (braiding yarn) is present, the attachment of the fastener element 4 to the fastener tape 3 is stable.

[0050] It can be that the first belt surface 31 is a sinking arc surface, and the second belt surface 32 is a needle-knitted arc surface. The first fastening yarn 61 contacts the core thread on the sinking arc surface side, and repeatedly crosses the core thread on the sinking arc surface side. The second fastening yarn 62 contacts the core thread on the needle-knitted arc surface side, and repeatedly crosses the core thread on the needle-knitted arc surface side. The first fastening yarn 61 is a 1 / 2 double-comb warp plain weave yarn, and the second fastening yarn 62 is a weft insertion yarn, so the first fastening yarn 61 has a higher tension than the second fastening yarn 62, and therefore, the core thread (for example, the first core thread 51) protrudes less from the sinking arc surface. In addition, in this article, the second core thread 52 protrudes relatively more from the needle-knitted arc surface than the first core thread 51, but due to the inherent convexity and concavity of the needle-knitted arc surface, the impact on human vision is relatively small. In addition, the first fastening yarn 61 is a 1 / 2 double bar warp plain weave yarn that forms a loop only in the second wale W2, so the tension is not as high as that of a normal double bar warp plain weave yarn, and the core thread will not be more conspicuous than the convexoconcavity inherent in the knitting arc surface.

[0051] The knitted fabric with base fabric 33 contains weft inserted yarns (e.g., Figure 5 In the case of weft insertion yarns 71 to 73), the turning portion 711 of the weft insertion yarn 71 and the turning portion 611 of the first fastening yarn 61 can be positioned in the same row of stitches in the first wale W1 (see Figure 5 ). Alternatively, the turning portion 711 of the weft insertion yarn 71 and the turning portion 621 of the second fastening yarn 62 can be positioned in the same row of stitches in the first wale W1. In addition, the weft insertion yarns 71 and 72 are yarns passing between the first core yarn 51 and the second core yarn 52.

[0052] Again, in the present disclosure, a 1 / 2 double bar warp plain weave yarn is used as the first fastening yarn 61 to suppress the first wale W1 from protruding outward from the first core yarn 51. Figure 7 , the first fastening yarn 61 forms a loop in a certain row of the second wale W2 (because it is pulled by the same needle in a crochet machine or a single-needle-bar Raschel warp knitting machine) in the same manner as the chaining yarn, crosses the first core thread 51 to the outside of the tape, and turns over without forming a loop in a row of loops above the first wale W1, and then crosses the first core thread 51 to the inside of the tape. The first fastening yarn 61 repeats this action to fix the first core thread 51 to the tape base fabric 33. In the first wale W1, the first fastening yarn 61 crosses and is held with the chaining yarn, but does not form a loop around which the chaining yarn is wound. In the second wale W2, the first fastening yarn 61 forms a loop in the same manner as the chaining yarn (because it is pulled by the same needle in a crochet machine or a single-needle-bar Raschel warp knitting machine), and the chaining yarn is wound around this loop. Thus, since double stitches are formed in the second wale W2, even if one of the stitch yarns is disconnected due to abrasion or the like caused by sliding of the slider 9, the fastener tape 3 does not fray.

[0053] The second fastening yarn 62 forms a reversing portion 621 in the third wale W3 directly adjacent to the second wale W2 at a position closer to the inside of the tape than the second wale W2 in which the first fastening yarn 61 forms the reversing portion 611, crosses the second core thread 52 to the outside of the tape, forms a reversing portion 621 in the first wale W1, and then crosses the second core thread 52 to the inside of the tape. The second fastening yarn 62 repeats this action to fix the second core thread 52 to the tape base fabric 33. In the first wale W1 and the third wale W3, the second fastening yarn 62 crosses and holds the chaining yarn, but does not form a loop around which the chaining yarn is wound. In addition, whether the yarns are wound can be determined based on whether the traveling direction of one yarn is reversed in relation to the other yarn.

[0054] Last return Figure 3 The pitch interval P1 of the first fastening yarn 61 observed along the first core thread 51 may be smaller than the pitch interval P2 of the zipper element 4. Thus, in addition to the improvement in the mounting strength of the zipper element 4 achieved by adopting the above-mentioned first fastening yarn 61, the change in the mounting strength of the zipper element 4 can be regarded as a more non-local change.

[0055] Specifically, by satisfying the above-mentioned condition P1<P2, the frequency of installing the zipper element 4 at the portion where the fastening yarn intersects the core thread increases compared to a case where this is not the case. Specifically, over a certain length along the warp direction (front-back direction), the number of zipper elements 4 installed on the core thread at the portion where the fastening yarn intersects the core thread (i.e., elements with the second installation strength) increases compared to the number of zipper elements 4 installed on the core thread at the portion where there is no fastening yarn (i.e., elements with the first installation strength), and the change in the installation strength of the zipper element 4 can be regarded as a more non-local change. Preferably, 0.3<(P1 / P2)<0.6 is satisfied. In this way, while the installation strength of the zipper element 4 is improved by adopting the first fastening yarn 61, the non-localization (in other words, averaging) of the installation strength of the zipper element 4 is promoted.

[0056] In the front-back direction, the width (front-back width) Q1 of the attachment base 41 (first leg 41p and second leg 41q) of the fastener element 4 is smaller than the width Q2 of the interval between adjacent fastener elements 4 in the arrangement of the fastener elements 4. Preferably, 0.5<(Q1 / Q2)<0.7 is satisfied.

[0057] Reference Figure 8 To illustrate the modified example. Figure 8 As shown, only one core thread 53 can be used as the core thread. In this case, the same effect as above can be obtained. The core thread 53 is fixed to the tape base fabric 33 by the first fastening yarn 61 and the second fastening yarn 62, and is held between the first wale W1 and the second wale W2.

[0058] like Fig. 9 As shown in FIG. 1 , the second fastening yarn 62 may be changed to a 1 / 2 double bar warp plain weave yarn similarly to the first fastening yarn 61. In the first wale W1, no loops are formed in any of the fastening yarns, and the same effect as described above is obtained. In the second wale W2, loops of the first fastening yarn 61 and loops of the second fastening yarn 62 may be formed alternately along the warp direction, thereby suppressing thickness variation in the same direction.

[0059] Based on the above disclosure, those skilled in the art can add various changes to the features and embodiments. The reference numerals in the claims are for reference only and should not be used for the purpose of limiting the interpretation of the claims.

[0060] Description of Reference Numerals

[0061] 1: Zipper

[0062] 2: Zipper chain

[0063] 3: Zipper tape

[0064] 4: Zipper teeth

[0065] 5: Core wire

[0066] 33: With base fabric

[0067] 38: Side edge

[0068] 51: 1st core wire

[0069] 52: Second core wire

[0070] 53: Core wire

[0071] 61: 1st fastening yarn

[0072] 62: Second fastening yarn

[0073] 71: Weft Inserted Yarn

[0074] 72: Weft Inserted Yarn

[0075] 73: Weft Inserted Yarn

[0076] 611: Flipping Department

[0077] 612: Coil

[0078] 621: Flipping Department

[0079] 711: Flipping Department

[0080] CP: Center

[0081] W1: 1st coil wale

[0082] W2: 2nd coil wale

[0083] W3: The third coil wale.

Claims

1. A zipper tape, comprising: A warp-knitted belt base fabric (33) having side edge portions (38) extending in the warp direction; and At least one core thread (51, 52, 53) is inserted as a warp into the side edge portion (38) of the tape base fabric (33), in the fastener tape (3), The at least one core thread (51, 52, 53) is fixed to the side edge portion (38) of the belt base fabric (33) by at least one fastening yarn (61, 62). The side edge portion (38) includes a first wale (W1) located outside the belt relative to the center (CP) of the at least one core wire (51, 52, 53) and a second wale (W2) located inside the belt relative to the center (CP) of the at least one core wire (51, 52, 53). The at least one fastening yarn (61, 62) includes a predetermined fastening yarn (61) which repeatedly performs the following actions: not forming a loop in the first wale (W1) but turning over, and forming a loop around which a ground yarn of the tape base fabric (33) is wound in the second wale (W2).

2. The zipper tape according to claim 1, wherein: The at least one core wire (51, 52, 53) includes a first core wire (51) and a second core wire (52) which are separately braided. The at least one fastening yarn (61, 62) includes a first fastening yarn (61) for the first core yarn (51) and a second fastening yarn (62) for the second core yarn (52). The first fastening yarn (61) is the predetermined fastening yarn (61), The second fastening yarn (62) is a weft insertion yarn that repeatedly performs a reversing motion without forming a loop in both the first wale (W1) and wales (W2, W3) other than the first wale (W1) to swing.

3. The zipper tape according to claim 2, wherein: The other wale (W3) is a wale (W3) located inward of the tape relative to the second wale (W2).

4. The zipper tape according to claim 2 or 3, wherein: The swing amplitude of the second fastening yarn (62) is larger than the swing amplitude of the first fastening yarn (61).

5. The zipper tape according to any one of claims 2 to 4, wherein In the first wale (W1), the turning parts (611) of the first fastening yarn (61) and the turning parts (621) of the second fastening yarn (62) are alternately formed in the warp direction.

6. The zipper tape according to any one of claims 1 to 5, wherein In the first wale (W1), no loops other than the loops formed by the ground yarn of the tape base fabric (33) are formed.

7. The zipper tape according to any one of claims 1 to 6, wherein The first wale (W1) is a wale located at the outermost side of the fastener tape (3).

8. The zipper tape according to any one of claims 1 to 7, wherein The zipper tape has a sinking arc surface and a needle-knitted arc surface on the opposite side of the sinking arc surface. The specified fastening yarn (61) contacts the at least one core wire (51, 52, 53) on the side of the sinking arc surface, and repeatedly crosses the at least one core wire (51, 52, 53) on the side of the sinking arc surface.

9. The zip fastener tape according to any one of claims 1 to 8, wherein The belt base fabric (33) comprises a plurality of braided chains (W1-W n ) and a plurality of weft insertion yarns (71, 72, 73) that swing with a swing amplitude between different longitudinal rows of coils in a manner connecting the plurality of braided chains.

10. The zipper tape according to claim 9, wherein: In the first wale (W1), the turning portion (611) of the predetermined fastening yarn (61) intersects with the plaiting yarn of the plaiting strip and is held by the plaiting yarn.

11. The zip fastener tape according to any one of claims 1 to 10, wherein The spacing of the fastening yarns (61, 62) observed along the at least one core thread (51, 52, 53) is smaller than the spacing of the fastener elements (4) relative to the fastener tape (3).

12. A zipper chain, wherein: have: The zip fastener tape (3) according to any one of claims 1 to 11; and A plurality of metal zipper elements (4) mounted relative to the at least one core wire (51, 52, 53) of the zipper tape (3).

Images