Method for manufacturing slide fasteners and fabric with fastening parts for slide fasteners

Abstract

A fastening part (2, 2') is attachable to an edge (91) of an article (9) directly or via an intervening object. The fastening part (2, 2') includes: an attachment face (2a) provided on one side in the thickness direction thereof orthogonal to the longitudinal direction thereof; and an engagement structure (2b) provided on the opposite side to the attachment face (2a) in the thickness direction thereof. The engagement structure (2b) includes at least one engaging element row (21-24) in which engaging elements (30) are disposed along the longitudinal direction of the fastening part (2, 2'). Each engaging element (30) is provided upright on the opposite side to the attachment face (2a).

Description

Technical Field

[0001] The present disclosure relates to fastening parts, slide fasteners, and a method for manufacturing a fabric with fastening parts.

Background Art

[0002] There is a need to avoid the influence of a fastening tape made of a different material from the fabric of the clothing on the appearance of the clothing by directly attaching a fastener element to the fabric of the clothing without a fastening tape, and also to avoid the reduction in the flexibility of the clothing due to the fastening tape.

[0003] Patent Document 1 discloses directly sewing a stringer without a tape to the fabric of clothing for various purposes such as weight reduction, cost reduction, or good-looking attachment of a slide fastener. The stringer has a fastener element made of a monofilament and an element fixing member inserted between the upper and lower legs of the fastener element, and the fastener element and the element fixing member are sewn together (see FIG. 3 of the same document).

[0004] Patent Document 2 discloses a novel fastening system. The fastening system has first and second fastening devices. Each fastening device includes a fastening portion and a tape portion connected thereto. A relief groove is formed in the fastening portion (see FIG. 2 of the same document).

[0005] Patent Document 3 discloses attaching fastener elements to both ends of a cloth tape and connecting it to an article at the central portion where the cloth tape is bent (see FIG. 2 of the same document).

[0006] Patent Document 4 discloses a slide fastener in which male and female strips are closely fitted.

Prior Art Documents

Patent Documents

[0007] [Patent Document 1] International Publication No. 2014 / 119150 [Patent Document 2] Patent No. 6947829 [Patent Document 3] China Utility Model No. 205006103 Specification [Patent Document 4] Japanese Patent Publication No. 2013-99425 [Overview of the project] [Problems that the invention aims to solve]

[0008] Fastener elements composed of monofilaments, such as those described in Patent Document 1, are easily deformed and therefore require additional components such as element fixing members, inevitably leading to increased costs during mass production. The inventors of this application have identified a new challenge: to provide fastening parts that can be attached to articles and are suitable for mass production. [Means for solving the problem]

[0009] A fastening part according to one aspect of the present disclosure is a long fastening part that can be attached directly to the edge of an article or via an intervening object. The fastening part includes a mounting surface provided on one side of its thickness direction perpendicular to the longitudinal direction of the fastening part, and an engagement structure provided on the opposite side of the mounting surface in the thickness direction of the fastening part. The engagement structure includes one or more rows of engagement elements arranged along the longitudinal direction of the fastening part. Each engagement element is provided upright on the side opposite to the mounting surface.

[0010] A slide fastener according to one aspect of the present disclosure includes left and right fastening parts and a slider that is movable forward and backward to engage and disengage the left and right fastening parts. The left fastening part is a longitudinally elongated part sewn directly or through an intermediary by stitching to the left edge of the opening of an article to which the slide fastener is attached, and includes at least one row of left-side engaging elements arranged along the longitudinal direction of the left fastening part. The left-side engaging elements protrude to the right, opposite to the left edge of the opening. The right fastening part is a longitudinally elongated part sewn directly or through an intermediary by stitching to the right edge of the opening of an article, and includes at least one row of right-side engaging elements arranged along the longitudinal direction of the right fastening part. The right-side engaging elements protrude to the left, opposite to the right edge of the opening. Each left and right fastening part further includes one or more upper slits extending downward from its upper edge to its lower edge, and one or more lower slits extending upward from its lower edge to its upper edge, wherein the upper and lower slits may be formed to a length exceeding half the vertical width of each left and right fastening part.

[0011] A fabric with a fastening part according to one aspect of the present disclosure is a fabric with a fastening part, which is a long fastening part sewn to the folded edge of the fabric either directly or via an intermediary with sewing thread, and includes a row of engaging elements arranged along the longitudinal direction of the fastening part, wherein each engaging element stands upright on the side opposite to the folded edge.

[0012] A method for manufacturing a fabric with a fastening part according to one aspect of the present disclosure includes the steps of: attaching the fastening part to the fabric along the side edge at a position away from the side edge of the fabric, wherein the fastening part extends elongatedly along the side edge of the fabric and includes a row of engaging elements arranged along the longitudinal direction of the fastening part, with each engaging element positioned upright on the side opposite to the fabric; and folding the fabric to form a folded end to which the fastening part is attached or to which it is to be attached. The step of attaching the fastening part to the fabric includes sewing the fastening part to the fabric with sewing thread, after which the fabric can be folded and the fastening part can be rotated. By rotating the fastening part, the engaging elements of the fastening part can be oriented so that their protruding direction is perpendicular to the thickness direction of the portion of the fabric other than the folded end.

[0013] In the various embodiments of this disclosure described above, the fastening part may include the features described in the dependent claims and any combination thereof. [Effects of the Invention]

[0014] According to one aspect of this disclosure, it is possible to provide fastening parts that can be attached to articles and are suitable for mass production. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic perspective view of a slide fastener according to one aspect of the present disclosure. [Figure 2] This is a schematic top view of a slide fastener attached to a piece of fabric. [Figure 3] This is a schematic cross-sectional view of a slide fastener attached to a piece of fabric. [Figure 4] This is a schematic partial perspective view of a fastening part, showing the mounting surface located on one side in the thickness direction. [Figure 5]It is a schematic partial perspective view of a fastening part, showing an engagement structure provided on the opposite side of the mounting surface in the thickness direction. [Figure 6] It is a schematic side view of a fastening part, and in particular, an engagement element row, a recess, and a slit are illustrated. [Figure 7] It is a schematic cross-sectional schematic view of a fastening part along the dashed-dotted line in FIG. 6. [Figure 8] It is a schematic view showing that the left and right fastening parts are engaged and disengaged by the forward and backward movement of a slider. [Figure 9] It is a manufacturing process diagram of a fastening part. [Figure 10] It is an installation process diagram of a fastening part on a fabric. [Figure 11] It is an installation process diagram of a fastening part on a fabric. [Figure 12] It is an installation process diagram of a fastening part on a fabric. [Figure 13] It is an installation process diagram of another example in which an intermediate sheet is provided between a fabric and a fastening part. [Figure 14] It is a schematic view of a slide fastener according to another aspect. [Figure 15] It is a cross-sectional schematic view of a slide fastener according to another aspect. [Figure 16] It is a partial perspective view of a fastening device. [Figure 17] It is a partial perspective view of a fastening part. [Figure 18] It is a partial side view of a fastening part. [Figure 19] It is a side view of a fastening part.

Embodiments for Carrying Out the Invention

[0016] The following describes non-limiting embodiments and features of the present invention with reference to the drawings. Those skilled in the art will understand that each embodiment and / or feature can be combined without needing excessive explanation, and that the synergistic effects of such combinations will also be understood. Duplication of explanation between embodiments will be omitted in principle. The reference drawings are primarily for describing the invention and are simplified for ease of drawing. Each feature is not valid only for the fastening parts disclosed herein, but is understood to be a universal feature applicable to various other fastening parts not disclosed herein.

[0017] In this specification, the direction of movement of the slider 8 that opens and closes the slide fastener 1 is defined as the front-to-back direction (see the double-headed arrow FB in Figure 1). The direction equal to the width direction of the slide fastener 1 and perpendicular to the front-to-back direction is defined as the left-to-right direction (see the double-headed arrow LR in Figure 1). The direction equal to the thickness direction of the slide fastener 1 and perpendicular to the front-to-back direction is defined as the up-and-down direction. The up-and-down direction is perpendicular to both the front-to-back and left-to-right directions. The up-and-down direction does not necessarily mean the vertical direction (direction of gravity). For example, when the longitudinal direction of the slide fastener 1 is oriented vertically, the up-and-down direction with respect to the slide fastener 1 is included in the horizontal direction (perpendicular to the vertical direction). Thus, the directions referred to in this specification are unrelated to the vertical direction.

[0018] The following explanation will be given with reference to Figures 1 to 3. Figure 1 is a schematic perspective view of a slide fastener 1 according to one aspect of the present disclosure. Figure 2 is a schematic top view of the slide fastener 1 attached to a fabric as an article 9. Figure 3 is a schematic cross-sectional view of the slide fastener 1 attached to a fabric.

[0019] The slide fastener 1 has a pair of left and right fastening parts 2,2' as a fastening device 2A, and a slider 8 that can move back and forth to engage and disengage the pair of left and right fastening parts 2,2'. When the slider 8 moves forward, the left and right fastening parts 2,2' engage, and when the slider 8 moves backward, the left and right fastening parts 2,2' disengage. The left and right fastening parts 2,2' can be engaged in a hook-to-hook type configuration. The fastening parts 2,2' are typically made of flexible resin, such as polyester. The fastening parts 2,2' can be mass-produced using various molding techniques thanks to their regular structure in the longitudinal direction. By manufacturing the fastening parts 2,2' in very long lengths (e.g., 10m), fastening parts 2,2' can be cut out from them in any length (e.g., 50cm). The ability to manufacture fastening parts 2,2' without considering the final product length is one advantage for mass production. Depending on the application, it may also be possible to manufacture fastening parts 2,2' with a harder material to reduce their flexibility.

[0020] The slider 8 has an upper wing plate 81, a lower wing plate 82, and a connecting column 83 that extends vertically and connects the front ends of the upper wing plate 81 and the lower wing plate 82, thereby defining a Y-shaped passage for the left and right fastening parts 2,2'. The slider 8 is typically made of resin, metal, or ceramics. The left and right side edges of the upper wing plate 81 are provided with upper flange walls 86 that rise downward. Similarly, the left and right side edges of the lower wing plate 82 are provided with lower flange walls 87 that rise upward. In this way, the movement paths of the left and right fastening parts 2,2' are restricted in the width direction of the slider 8. The vertical distance between the upper wing plate 81 and the lower wing plate 82 is designed to correspond to the width of the fastening parts 2,2', as will be described later.

[0021] The fastening parts 2,2' are elongated parts that can be attached directly to the edge 91 of the article 9 or via an intermediary (for example, a flexible thin material such as another piece of cloth) (see Figures 2 and 3). The article 9 to which the fastening parts 2,2' are directly attached is, for example, a highly flexible fabric such as clothing fabric, bag fabric, or shoe fabric. The edge 91 of the article 9 is the edge that defines the opening that is opened and closed by the slide fastener 1. In some cases, the edge 91 is a folded edge formed by folding the fabric, which facilitates the efficient sewing of the fastening parts 2,2' to the fabric as described later. When the fabric is folded, the fabric has a main fabric 92 and a secondary fabric 93 (see Figure 3), which are overlapped and a folded edge is formed between them. The main fabric 92 and the secondary fabric 93 can be sewn together with one or more sewing threads 200 along the side edge 95 of the secondary fabric opposite to the folded edge.

[0022] In some cases, in the vertical direction, the width W2 of the fastening parts 2,2' is greater than the width W91 of the article 9 (the laminated thickness of the main fabric 92 and the secondary fabric 93). Advantageously, the projection height H2 of the fastening parts 2,2' from the main surface of the article 9 (the upper surface of the main fabric 92) is 1 cm or less (i.e., within the range of 0 to 1 cm) or 0.8 cm or less (i.e., within the range of 0 to 0.8 cm). Note that the main surface of the article 9 refers to either its upper or lower surface. Depending on the type or state of the article 9, configurations in which the width W2 of the fastening parts 2,2' is equal to or less than the width W91 of the article 9 (the laminated thickness of the main fabric 92 and the secondary fabric 93) are also conceivable.

[0023] For the sake of clarity, when fastening parts 2,2' are directly attached to the fabric, the omission of the fastener tape promotes weight reduction of the fabric with fastening parts attached, increases its flexibility, and improves its appearance. Furthermore, this disclosure does not preclude the use of fastener tape as article 9 unless explicitly excluded by phrases such as "article (excluding fastener tape)".

[0024] The structure of fastening parts 2,2' will be described with reference to Figures 4 to 7. Figure 4 is a schematic partial perspective view of fastening parts 2,2', showing the mounting surface 2a provided on one side in the thickness direction. Preferably, fastening parts 2,2' are formed mirror-symmetric with respect to their center line CX. Figure 5 is a schematic partial perspective view of fastening parts 2,2', showing the engagement structure 2b provided on the opposite side of the mounting surface 2a in the thickness direction. Figure 6 is a schematic side view of fastening parts 2,2', in particular showing the engagement element rows 21-24, the recess 55, and the slits S1,S2. Figure 7 is a schematic cross-sectional diagram of fastening parts 2,2' along the dashed line in Figure 6. The directions of fastening parts 2,2' can be mapped to the directions of the slide fastener 1 as follows: The longitudinal direction of fastening parts 2,2' coincides with the front-to-back direction of the slide fastener 1. The width direction of fastening parts 2,2' coincides with the vertical direction of slide fastener 1. The thickness direction of fastening parts 2,2' coincides with the horizontal direction of slide fastener 1.

[0025] The fastening parts 2,2' have a mounting surface 2a (Figure 4) provided on one side of their thickness direction perpendicular to their longitudinal direction, and an engaging structure 2b provided on the opposite side of the mounting surface 2a in the thickness direction of the fastening parts 2,2' (Figure 5). The thickness (thickness direction) of the fastening parts 2,2' can be defined as the height (height direction) of the engaging structure 2b from the mounting surface 2a. The engaging structure 2b of the fastening parts 2,2' is provided so as to face or abut against the engaging structure of the fastening part it engages with, and is capable of engaging with it. The mounting surface 2a of the fastening parts 2,2' is provided so as to at least partially face or at least partially abut against the edge 91 of the article 9 to which the fastening parts 2,2' are attached, and is capable of being attached to it. The mounting surface 2a may, but is not limited to, have at least partially flat surfaces. The flat surface of the mounting surface 2a may be oriented perpendicular to the left-right direction in the slide fastener 1.

[0026] The engagement structure 2b includes one or more rows of engagement elements in which engagement elements 30 are arranged along the longitudinal direction of the fastening parts 2, 2', and in the illustrated example, includes four rows of engagement elements 21 to 24 arranged side by side in the width direction of the fastening parts 2, 2' (see, for example, Figures 4 to 6). The rows of engagement elements 21 to 24 may be distinguished by being called the first to fourth rows of engagement elements 21 to 24, respectively. Each engagement element 30 is hook-shaped (not loop-shaped) and includes a base 31 that stands upright on the side opposite to the mounting surface 2a and at least one projection 32 that protrudes from the base 31 along the longitudinal direction of the fastening parts 2, 2' (see, for example, Figure 7). Between adjacent engagement elements 30 in the rows of engagement elements 21 to 24, a receiving space 33 is formed to receive the engagement element of the fastening part to be engaged. The width W33 of the receiving space 33 in the thickness direction of the fastening parts 2,2' may gradually increase as it moves away from the base 31 along the protruding direction of the projection 32.

[0027] As shown in Figure 6, engaging element rows 21 and 23, whose projection directions of the protrusions 32 are opposite with respect to the longitudinal direction of the fastening parts 2 and 2', can be arranged adjacent to each other as a pair. The same applies to engaging element rows 22 and 24. In this case, the force required to engage or disengage the fastening parts 2 and 2' increases, thereby increasing the lateral pulling strength of the slide fastener 1. The arrangement direction of the engaging elements 30 in engaging element rows 21 to 24 coincides with the longitudinal direction of the fastening parts 2 and 2'. When two or more engaging element rows 21 to 24 are provided, the arrangement direction of these engaging element rows 21 to 24 coincides with the width direction of the fastening parts 2 and 2'.

[0028] The structure of the fastening parts 2,2' (particularly the structure of the engagement element rows 21-24) can be described as being composed of alternating connections between engagement elements 30 and connecting portions 70 (see Figure 7). The connecting portion 70 is a thin portion that connects the engagement elements 30. The minimum thickness of the fastening parts 2,2' is defined by the upper and lower surfaces of the connecting portion 70. A groove 36, described later, may be formed between adjacent connecting portions 70 in the longitudinal direction of the fastening parts 2,2'. In addition, a groove 37 and slits S1,S2, described later, may be formed in each connecting portion 70.

[0029] The fastening parts 2,2' may further include attachment portions 27 extending in their longitudinal direction. The attachment portion 27 may be a single continuous portion or a portion divided into multiple parts along the longitudinal direction of the fastening part 2,2'. The fastening parts 2,2' are attached to the edge 91 of the article 9 directly or via intermediaries at the attachment portions 27 other than where the engagement element rows 21-24 are formed. Advantageously, the attachment portions 27 are located between adjacent engagement element rows (e.g., engagement element row 21 and engagement element row 22) in the width direction of the fastening part 2,2', and preferably on the centerline CX of the fastening part 2,2'. This facilitates the placement of the engagement element rows 21, 22 (and optionally, additional engagement element rows 23, 24) on both sides of the attachment portion 27 on both sides of the thickness center of the edge portion 91 (see plane PL0 in Figure 3), allowing the edges 91 of the article 9 to be joined together well via the fastening device 2A. In Figure 3, the sewing thread 96 for sewing the attachment portion 27 to the edge portion 91 may be located within or included in the plane PL0, which is located at the thickness center of the edge portion 91. The main fabric 92 and the secondary fabric 93 are positioned on both sides of the plane PL0.

[0030] The attachment portion 27 may be formed thinner than the engaging element 30 in the thickness direction of the fastening parts 2,2'. When the fastening parts 2,2' are sewn to the edge 91, the sewing needle can be penetrated through the attachment portion 27 with less force. When the fastening parts 2,2' are welded to the edge 91, the heat capacity of the attachment portion 27 is reduced, promoting smoother welding. The attachment portion 27 may be formed thinner than the connecting portion 70 in some cases. In some cases, the attachment portion 27 may be provided as a thickness portion having a constant or different thickness from the bottom surface 53g of the receiving groove 53 described later, or as a wall having a constant or different height from the bottom surface 53g of the receiving groove 53 described later. The attachment portion 27 may be in direct contact with the article 9 at the bottom surface 53g of the receiving groove 53.

[0031] The attachment portion 27 may, as an addition or alternative, be formed narrower than any of the engagement element rows 21-24 in the width direction of the fastening parts 2, 2'. This facilitates the formation of engagement element rows 21-24 (and each engagement element 30) with a desired width. Optionally, the first and third engagement element rows 21, 23 may be directly adjacent to the attachment portion 27 with a smaller gap than the attachment portion 27 in the width direction of the fastening parts 2, 2', and the second and fourth engagement element rows 22, 24 may be directly adjacent to the attachment portion 27 with a smaller gap than the attachment portion 27, thereby promoting a high-density arrangement of engagement element rows.

[0032] The attachment portion 27 has at least one recess 55 formed therein to receive the stitches 97 of the sewing thread 96 for sewing the fastening parts 2,2' to the edge portion 91. Typically, the attachment portion 27 is formed as a wall with at least one recess 55 formed on its top surface. When the fastening parts 2,2' of the fastening device 2A engage with each other, the top surfaces of the walls of the attachment portion 27 of each fastening part 2,2' are adjacent to each other and / or are positioned opposite each other (with or without the sewing thread in between). A plurality of recesses 55 may be provided along the longitudinal direction of the fastening parts 2,2' (more preferably along the center line CX of the fastening parts 2,2') at a predetermined pitch (corresponding to the stitch pitch 97). Each of the plurality of recesses 55 is preferably elongated in the longitudinal direction of the fastening part 2,2'. The sewing machine needle penetrates the thinned portion of the fastening parts 2,2' provided by the recess 55, making it easier to sew the fastening parts 2,2' to the article 9. It is also possible to provide additional recesses 55 in locations other than the attachment portion 27 on the fastening parts 2,2'. Note that the attachment portion 27 can also be provided in locations other than between the adjacent first engagement element row 21 and second engagement element row 22 in the width direction of the fastening parts 2,2'.

[0033] The fastening parts 2,2' may have guide walls 25,26 on both sides (typically both side edges of the fastening parts 2,2') that sandwich the rows of engaging elements 21-24 in their width direction. The guide walls 25,26 may be positioned at the furthest point from the center line CX of the fastening parts 2,2' in their width direction. The guide wall 25 can contact either the lower surface of the upper plate 81 and the upper surface of the lower plate 82 of the slider 8, and the guide wall 26 can contact the other of the lower surface of the upper plate 81 and the upper surface of the lower plate 82 of the slider 8, thereby assisting the smooth movement of the slider 8 along the fastening parts 2,2' and preventing damage to the engaging elements 30 due to collision between the slider 8 and the engaging elements 30. In the slide fastener 1, these rows of engaging elements 21-24, the guide walls 25,26, and the attachment portion 27 are arranged along the vertical direction.

[0034] One or more walls of the guide wall 25 and guide wall 26 may be configured as a series of wall portions arranged at a predetermined pitch along the longitudinal direction of the fastening parts 2,2' so as not to reduce the flexibility of the fastening parts 2,2'. The same applies to the adherend portion 27. Referring to Figure 5, the guide wall 25 has wall portions 25g arranged at a predetermined pitch (equal to the arrangement pitch of the engaging elements 30) in the longitudinal direction of the fastening parts 2,2', with grooves 25j formed between them. The grooves 25j are in spatial communication with the receiving space 33 formed between the engaging elements 30 in the width direction of the fastening parts 2,2'. The description of the guide wall 25 also applies to the guide wall 26, where wall portions 25g are read as wall portions 26g and grooves 25j are read as grooves 26j. The explanation given for the guide wall 25 also applies to the adherend 27, where wall portion 25g is replaced with wall portion 27g and groove 25j with groove 27j. Thus, the flexibility of the fastening parts 2,2' can be increased.

[0035] The mounting surface 2a is provided with at least one guide projection 51, 52 positioned between the upper and lower flange walls 86, 87 of the slider 8. When a pair of fastening parts 2, 2' are housed in the movement path between the upper wing plate 81 and the lower wing plate 82 of the slider 8, the guide projections 51, 52 provided on the mounting surface 2a of each fastening part 2, 2' are positioned between the upper and lower upper and lower flange walls 86, 87 of the slider 8. In the illustrated example, two rows of guide projections 61, 62 are provided on the mounting surface 2a, with the guide projections 51, 52 positioned in the longitudinal direction of the fastening parts 2, 2' (see Figure 4). The guide projections 51, 52 are positioned away from both ends of the fastening parts 2, 2' in the width direction, forming guide surfaces 56, 57 at both ends of the fastening parts 2, 2' in the width direction. As a result, interference between the fastening parts 2,2' and the upper and lower flange walls 86,87 of the slider 8 is avoided on both sides in the width direction of the fastening parts 2,2', and in short, a stable, slidable engagement of the slider 8 with the fastening parts 2,2' is achieved. Specifically, the guide surfaces 56,57 face or contact the upper and lower flange walls 86,87 of the slider 8, thereby restricting the movement of the fastening parts 2,2' in the width direction of the slider 8 and promoting the smooth movement of the slider 8. The guide surfaces 56,57 are typically formed as flat surfaces, but are not limited to this.

[0036] Each guide projection 51 has a first side surface 51p and a second side surface 51q in the width direction of the fastening parts 2,2'. Similarly, each guide projection 52 has a first side surface 52p and a second side surface 52q in the width direction of the fastening parts 2,2'. In the slide fastener 1, the first side surface 51p of the guide projection 51 faces or contacts the lower surface of the upper flange wall 86 to assist in the smooth movement of the slider 8. Similarly, the first side surface 52p of the guide projection 52 faces or contacts the upper surface of the lower flange wall 87 to assist in the smooth movement of the slider 8. The second side surface 51q of the guide projection 51 faces the opposite side of the first side surface 51p and is positioned to face the second side surface 52q of the guide projection 52 across the center line CX of the fastening parts 2,2'. The second side surface 52q of the guide projection 52 faces the opposite side of the first side surface 52p, and is positioned opposite the second side surface 51q of the guide projection 51, with the center line CX of the fastening parts 2,2' in between. The bottom surface 53g of the receiving groove 53 of the edge 91 is formed between the second sides 51q and 52q of the guide projections 51 and 52. Note that the first and second sides of the slide fastener 1 shown in Figure 1 can also be referred to as the upper and lower surfaces.

[0037] The provision of the guide protrusions 51 and 52 described above facilitates ensuring a sufficiently wide vertical gap between the upper flange wall 86 and the lower flange wall 87 (see Figure 3). Specifically, there is a gap between the main fabric 92 and the upper flange wall 86, which suppresses or avoids wear. Additionally or alternatively, there is a gap between the sub-fabric 93 and the lower flange wall 87, which suppresses or avoids wear. In some cases, the gap between the lower surface of the upper flange wall 86 and the upper surface of the lower flange wall 87 is slightly larger than the gap W9 between the first sides 51p and 52p of the guide protrusions 51 and 52 of the fastening parts 2 and 2' (see Figure 4).

[0038] As described above, by forming a receiving groove 53 between the guide protrusions 51 and 52 to receive the edge portion 91, the fastening parts 2 and 2' can be more stably supported by the edge portion 91 of the article 9. Of course, this is not the only option; the guide protrusions 51 and 52 can also be connected in the width direction of the fastening parts 2 and 2' to form a single guide protrusion.

[0039] To increase the flexibility of the fastening parts 2,2', a groove 36 can be recessed in the mounting surface 2a, penetrating (lightening) the base 31 of the engaging element 30. The groove 36 extends in the width direction of the fastening parts 2,2' with a constant or variable depth D36. The groove 36 is formed in the longitudinal direction of the fastening parts 2,2' with the same pitch P1 as the engaging element 30. Of course, the pitch of the groove 36 can also be a multiple of the pitch of the engaging element 30. Furthermore, the groove 36 extends across the entire width of the fastening parts 2,2' in the width direction, and can penetrate, for example, the guide walls 25,26 and the wall portions 25g,26g,27g of the attached portion 27. As a result, one open end of the groove 36 is formed on the side surface of the guide wall 25 in the width direction of the fastening parts 2,2', and the other open end of the groove 36 is formed on the side surface of the guide wall 26. In the longitudinal direction of the fastening parts 2,2', each groove 36 is sandwiched between guide projections 51 and similarly between guide projections 52, which are arranged adjacent to each other in the same direction.

[0040] To increase the flexibility of the fastening parts 2,2', grooves 37 can be formed between adjacent engaging elements 30 in the longitudinal direction of the fastening parts 2,2' to thin the fastening parts 2,2'. Grooves 36 and grooves 37 are formed alternately in the longitudinal direction of the fastening parts 2,2'. Grooves 36 can be formed deeper than grooves 37 to the extent that they penetrate the base 31 of the engaging element 30, but this is not necessarily the case. The pitch P2 of grooves 37 is the same as the pitch P1 of the engaging element 30, but it can also be a multiple thereof.

[0041] Multiple slits S1, S2 can be formed in the width direction of the fastening parts 2, 2'. Each of the multiple slits S1, S2 is located between adjacent engaging elements 30 in the longitudinal direction of the fastening parts 2, 2'. In this way, the fastening parts 2, 2' become more easily deformable (for example, they become more easily bent in the left-right and / or up-down directions, or more easily twisted). By forming slits S1, S2 in the fastening parts 2, 2', it is expected that they will become more easily bent in accordance with the deformation of the edge 91 when attached to the edge 91 of the article 9. Preferably, each of the multiple slits S1, S2 is formed to be longer than half the width of the fastening parts 2, 2'. Slit S1 is an upper slit that extends downward from the upper edge to the lower edge of the fastening parts 2, 2'. Slit S2 is a lower slit that extends upward from the lower edge to the upper edge of the fastening parts 2, 2'.

[0042] As can be seen from the above description, the fastening parts 2,2' according to this disclosure have a mounting surface 2a (Figure 4) provided on one side of its thickness direction perpendicular to its longitudinal direction, and an engagement structure 2b provided on the opposite side of the mounting surface 2a in the thickness direction of the fastening parts 2,2' (Figure 5). The engagement structure 2b includes one or more rows of engagement elements 21 to 24 in which engagement elements 30 are arranged along the longitudinal direction of the fastening parts 2,2'. Each engagement element 30 is provided standing upright on the side opposite to the mounting surface 2a. Thus, fastening parts 2,2' that can be directly attached to an article 9 and are suitable for mass production are provided.

[0043] To reiterate, the fastening parts 2,2' can be directly attached to the edge 91 of the article 9. Therefore, by using these fastening parts 2,2', a slide fastener 1 without a fastener tape can be constructed. Advantageously, the fastening parts 2,2' are selectively attached to the article 9 at one location on the attachment portion 27 in their width direction (which may include the bottom surface 53g of the receiving groove 53). As mentioned above, the attachment portion 27 can be elongated in the longitudinal direction of the fastening parts 2,2'. When the fastening parts 2,2' described above are used as the left and right fastening parts 2,2', the slide fastener 1 will have the following features. The left fastening part 2 is a long part in the front-to-back direction, sewn directly or via an intermediary with a sewing thread 96 to the left edge of the opening of the article 9 to which the slide fastener 1 is attached, and includes at least one row of left-side engaging elements arranged along the longitudinal direction of the left fastening part 2, the left-side engaging elements protruding to the right, opposite to the left edge of the opening. The right fastening part 2' is a long part in the front-to-back direction, sewn directly or via an intermediary with a sewing thread 96 to the right edge of the opening of the article 9, and includes at least one row of right-side engaging elements arranged along the longitudinal direction of the right fastening part 2', the right-side engaging elements protruding to the left, opposite to the right edge of the opening. By reinterpreting the directions of the fastening parts 2 and 2' in terms of the directions of the slide fastener 1 (up and down direction, front-to-back direction, left-to-right direction), the various features described above for the fastening parts 2 and 2' can also be applied to the slide fastener 1.

[0044] As can be seen in Figure 8, when the slider 8 moves forward, the engaging element 30 that enters the slider 8 from the front opening moves through a passage the width of the connecting column 83 and the upper and lower flange walls 86, 87, then engages with the engaging partner engaging element 30 at a position behind the connecting column 83, and finally moves out of the slider 8 through the rear opening. When the slider 8 moves backward, the engaged left and right engaging elements 30 enter the slider 8 through the rear opening, are disengaged at a position behind the connecting column 83, move through the left and right passages of the connecting column 83, and finally move out of the slider 8 through the left and right front openings of the connecting column 83. Guide projections 51, 52 are sandwiched between the upper and lower flange walls 86, 87 of the slider 8, promoting stable sliding movement of the slider 8. Thanks to the grooves 36 and / or grooves 37 formed in the fastening parts 2,2', the fastening parts 2,2' have increased flexibility, thereby reducing the sliding resistance of the slider 8.

[0045] The fastening parts 2,2' can be manufactured by supplying molten resin from the discharge section 103 between two adjacent die wheels 101,102, as shown in Figure 9. Although not shown, one circumferential surface of the die wheels 101,102 has a cavity formed thereon that can mold the engagement structure 2b of the fastening parts 2,2', and the other circumferential surface has a cavity formed thereon that can mold the structure on the mounting surface 2a side of the fastening parts 2,2'.

[0046] If the article 9 is made of fabric, the fastening part 2 can be directly attached to the fabric by the procedure shown in Figures 10 to 12 (the same applies to the fastening part 2'). In Figure 10, the fastening part 2 is sewn to the fabric along the side edge 95 using sewing thread 96 at a position away from the side edge 95 and inward from the fabric (i.e., at a position on a vertical plane PL2 parallel to the vertical plane PL1 relating to the side edge 95) (for example, at its attachment portion 27). The fastening part 2 is selectively attached to a predetermined portion of the fabric at its attachment portion 27 (the portion that will become the folded edge as described later), and is not attached to the fabric in other portions (for example, the portion where the engagement element rows 21 to 24 are provided). When the fastening part 2 is placed on the mounting surface 98 of the article 9, the protruding direction of the engagement element 30 coincides with the direction away from the mounting surface 98 of the article 9 (for example, the orthogonal direction). Various sewing methods can be used, such as straight stitching, single chain stitching, and double chain stitching. The sewing direction using thread 96 aligns with the longitudinal direction of fastening part 2.

[0047] The fastening part 2 can also be fixed to the article 9 by ultrasonic welding as an addition to or alternative to sewing. The fastening part 2 is placed on the mounting surface 98 of the article 9 so that the mounting surface 2a of the fastening part 2 (for example, the bottom surface 53g of the receiving groove 53 between the guide projection 51 and the guide projection 52) is in contact with the mounting surface 98 of the article 9. The shape of the anvil is optimized to ensure reliable contact between the fastening part 2 and the article 9. In some cases, a protrusion is provided on the anvil that protrudes between the guide projection 51 and the guide projection 52.

[0048] Next, the horn is brought into contact with the fastening part 2 (for example, its attachment portion 27) to supply ultrasonic vibrations to the fastening part 2. At this time, the fastening part 2 (for example, the bottom surface 53g of the receiving groove 53) and the article 9 are welded together on the opposite side of the contact point of the horn (for example, the attachment portion 27). The horn is moved in the longitudinal direction of the fastening part 2, or the fastening part 2 is moved relative to the horn which is stationary in a predetermined position. In this way, welded portions can be formed continuously or intermittently in the longitudinal direction of the fastening part 2, thereby fixing the fastening part 2 to the article 9. Both the fastening part 2 and the article 9 are made of resin.

[0049] In Figure 11, the fabric is folded back, forming a folded edge (the edge portion 91 described above) to which the fastening part 2 is sewn. For example, the secondary fabric 93 is overlapped with the main fabric 92 to form the folded edge, and at the same time, the fastening part 2 is rotated 90° with respect to the mounting surface 98 of the article 9. Due to the rotation of the fastening part 2, the protruding direction of the engaging element 30 of the fastening part 2 changes by 90° so that it is oriented perpendicular to the thickness direction of the portion of the fabric other than the folded edge (e.g., the main fabric 92). More generally, the protruding direction of the engaging element 30 changes from perpendicular to the mounting surface 98 of the article 9 (e.g., the main fabric 92) to parallel to it. Also, the rows of engaging elements 21 and 22 on both sides of the attachment portion 27 are arranged side by side in the thickness direction of the main fabric 92, and the same benefits as described above are obtained by arranging them on both sides of the plane PL0 as described above (see Figure 3). Furthermore, the process of forming the folded edge shown in Figure 11 can also be performed before the attachment process shown in Figure 10. In this case, the folded edge to which the fastening part 2 is to be sewn is formed by folding the fabric. This method may be more suitable for ultrasonic welding. In Figure 12, the parts of the fabric (for example, the main fabric 92 and the secondary fabric 93) are sewn together with sewing thread 200 near the side edge 95 of the fabric. If the article 9 is not made of fabric, the fastening part 2 may be attached to it in a manner different from that described.

[0050] As shown in Figure 13, as an example of the non-limitation of the intervening material, it is also possible to sew the fastening parts 2,2' to the fabric via an intermediate sheet 99. The intermediate sheet 99 can be a thin material such as fabric or a resin sheet. In this case as well, the fabric can be folded over, similar to Figure 11.

[0051] Refer to Figures 14 to 19 to further describe alternative structures of the fastening parts 2, 2'. The slide fastener 1, as described above, has left and right fastening parts 2, 2' and a slider 8, and the left and right fastening parts 2, 2' can be engaged and disengaged as the slider 8 moves back and forth. Typically, the fastening parts 2, 2' are directly attached to the article 9, and weight reduction and / or cost reduction are promoted by eliminating the need for woven and / or knitted fastener tape.

[0052] The fastening parts 2 and 2' have first and second engagement element rows 21 and 22, an attachment portion 27, and a substrate 40. Each of the first and second engagement element rows 21 and 22 includes a plurality of engagement elements 30 arranged at a predetermined pitch. The fastening parts 2 and 2' include the first engagement element row 21, the attachment portion 27, and the second engagement element row 22 in their width direction, but do not have the third and fourth engagement element rows 23 and 24 and the guide walls 25 and 26 described above (i.e., a three-row structure, i.e., two rows of the first and second engagement element rows 21 and 22 + one row of the attachment portion 27), and are narrower. This improves the flexibility of the fastening device 2A when attached to the article 9. Note that the third and fourth engagement element rows 23 and 24 are omitted, but the guide walls 25 and 26 can be retained.

[0053] One side of the substrate 40 is the mounting surface 2a described above, and each engaging element 30 is provided standing upright on the opposite side of the mounting surface 2a. A group of engaging elements 30 are connected to a common attachment portion 27 and / or a common substrate 40 to ensure mechanical integrity and strength. Adjacent engaging elements 30 in the longitudinal direction of the fastening parts 2, 2' are connected by a connecting portion 70 which is part of the substrate 40. By forming the substrate 40 sufficiently thin (for example, 9 mm or less, 7 mm or less, or 6 mm or less), sufficient flexibility in the longitudinal direction of the fastening parts 2, 2' can also be ensured. The inclusion of the substrate 40 in the fastening parts 2, 2' facilitates the smooth molding of the fastening parts 2, 2' and / or the smooth movement of the slider 8, but of course, the entire or partial substrate 40 can be omitted. In one case, all connecting portions 70 of the substrate 40 are omitted, and in another case, one or more selected connecting portions 70 of the substrate 40 are omitted. In the former case, the connection between the engaging elements 30 is ensured only by the attached portion 27, and in the latter case, the connection between the engaging elements 30 is ensured by the attached portion 27 and one or more selected connecting portions 70. Alternatively, slits may be formed in the connecting portions 70, or openings and / or notches may be formed by punching out at least a portion of the connecting portions 70. Guide protrusions 51 and 52 can also be provided on the mounting surface 2a, but if they are formed flat as in the illustrated example, the structure of the mold, such as a die wheel, can be simplified.

[0054] The attachment portion 27 is a projection that extends longitudinally along the fastening parts 2,2' between the first and second engagement element rows 21,22 and protrudes on the side opposite to the mounting surface 2a. The attachment portion 27 is formed on the substrate 40 lower than the engagement element 30 but has a thickness greater than the thickness of the substrate 40 (TH27>TH40). This provides the necessary strength when the fastening parts 2,2' are sewn to the article 9, sufficient thickness to withstand heat welding, prevention of breakage during demolding from the die wheel in the manufacturing process, or other advantages. The attachment portion 27 may optionally include reinforcing material 28 such as braided cord, twisted cord, or nonwoven fabric strip extending in its direction of extension, thereby increasing its mechanical strength and / or attachment strength to the article 9. In particular, if the reinforcing material 28 includes one of the following: braided cord, twisted cord, nonwoven fabric piece, or any combination thereof, when the fastening parts 2,2' are sewn together, the reduction in strength of the resin portion of the attachment part 27 is suppressed even if a needle is inserted into it. The reinforcing material 28 does not need to be embedded in the attachment part 27; it may be fixed to the attachment part 27. In this case, the reinforcing material 28 is visible from the outside of the fastening parts 2,2'.

[0055] Each engaging element 30 included in the first and second engaging element rows 21 and 22 has two protrusions 32 that project in opposite directions on both sides in the longitudinal direction of the fastening parts 2 and 2'. That is, instead of assigning protrusions 32 that project in opposite directions and only to one side to two rows of engaging elements, the first and third engaging element rows 21 and 23, protrusions 32 that project on both sides are assigned to a single row of engaging elements. This makes it possible to improve the flexibility of the fastening device 2A without causing a significant decrease in the engaging force between the engaging elements 30 of the fastening parts 2 and 2'. The two protrusions 32 described above include a front protrusion 32a that projects forward compared to the base 31 and a rear protrusion 32b that projects backward compared to the base 31.

[0056] In the first engagement element row 21, the engagement elements 30 are arranged at a first pitch, and in the second engagement element row 22, the engagement elements 30 are arranged at a second pitch, in some cases the first and second pitches are equal, and in other cases they are different. By setting the first and second pitches to be equal, the distinction (or orientation related thereto) between the first and second engagement element rows 21,22 is eliminated, and / or a good balance between the first and second engagement element rows 21,22 with respect to the target engagement force is ensured. Depending on the setting of the first and second pitches, the engagement elements 30 of the first and second engagement element rows 21,22 may be arranged at least partially opposite each other in the width direction of the fastening parts 2,2'. In the illustrated case, the first and second engagement element rows 21,22 are formed as mirror images, and therefore the engagement elements 30 of the first and second engagement element rows 21,22 are provided as opposing pairs in the width direction of the fastening parts 2,2', and the same benefits as described above are obtained.

[0057] Each engaging element 30 of the first and second engaging element rows 21 and 22 has a flat opposing surface 38. The spacing of the opposing surfaces 38 typically matches the maximum width W27 of the attachment portion 27, but is not necessarily so. The spacing of the opposing surfaces 38 can be appropriately changed depending on the thickness of the needle used when sewing the article 9. The opposing surfaces 38 are oriented substantially perpendicular to the plane on which the substrate 40 is located, but can also be inclined. Each engaging element 30 has an opposing surface 39 on the opposite side of the opposing surface 38. The opposing surface 39 faces or contacts the upper wing plate 81 or lower wing plate 82 of the slider 8 when the engaging element 30 enters the slider 8. The opposing surface 39 is a substantially flat surface located in a plane perpendicular to the vertical direction, and therefore smooth sliding of the slider 8 is ensured.

[0058] The engaging element 30 has a symmetrical constricted shape, for example, having a base 41, a neck 42, and a head 43, with the neck 42 being constricted. By adopting such a constricted shape, the engaging element 30 can have two protrusions 32 that project from both sides, not just one side, in the longitudinal direction of the fastening parts 2,2', as described above. The base 41 has a width W41 that gradually decreases toward the head 43. The neck 42 is provided between the base 41 and the head 43 and has a narrower width W42 than both. The head 43 has a width W43 that gradually increases as it moves away from the neck 42, and then gradually decreases. The engaging element 30 has a width in the longitudinal direction of the fastening parts 2,2', a width (which can also be called thickness) in the width direction of the fastening parts 2,2', and a height in the thickness direction of the fastening parts 2,2'.

[0059] The space between adjacent engaging elements 30 in the longitudinal direction of fastening parts 2 and 2' includes a receiving space 33. The head 43 of the engaging element 30 of fastening part 2 is inserted between the neck portions 42 of adjacent engaging elements 30 of fastening part 2'. The base 41 has two sides 41a and 41b that rise from the substrate 40, and each connects an opposing surface 38 and an opposite surface 39. A gap communicating with the receiving space 33 is formed between the opposing sides 41a and 41b between adjacent engaging elements 30, and therefore, sufficient flexibility of fastening parts 2 and 2' is ensured.

[0060] The engaging element 30 may optionally have at least two shoulder protrusions 44 provided on both sides of the neck portion 42 and a receiving groove 45 that receives the shoulder protrusions 44 of the engaging element 30 of the other engaging element 30, providing sufficient resistance to upward thrust of the slide fastener 1 in the vertical direction. When the left and right engaging elements 30 of the left and right fastening parts 2, 2' engage with each other, the shoulder protrusions 44 of one engaging element 30 are inserted into the receiving groove 45 of the other engaging element 30, thereby limiting the vertical displacement of both engaging elements 30. The receiving groove 45 is recessed in the opposing surface 38 in such a manner that it cuts out the edge of the head portion 43, and is formed over the entire width of the head portion 43. The maximum width W44 of the shoulder protrusions 44 is less than or equal to half the maximum width W30 of the engaging element 30, which allows the receiving groove 45 to be formed shallowly (in the width direction of the fastening parts 2, 2'), thereby suppressing a decrease in the mechanical strength of the head portion 43.

[0061] Referring to Figures 14 to 19, the fastening parts 2 and 2' described above can be manufactured by the same manufacturing method as shown in Figure 9, and can be installed by the same mounting method as shown in Figures 10 to 12; therefore, redundant explanations will be omitted.

[0062] Based on the above disclosures, those skilled in the art can make various modifications to each feature and each embodiment. The reference numerals included in the claims are for reference only and should not be used to limit the scope of the claims. In the illustrated example, the mounting surface 2a contacts the article 9 at its receiving groove 53 (particularly the bottom surface 53g), but does not contact the article 9 at its guide surfaces 56, 57. However, the mounting surface 2a can be understood as a mounting surface as a whole, insofar as it includes an area that faces or contacts the article 9.

Claims

1. Left fastening part (2,2') and Right-side fastening part (2,2') and A slide fastener (1) comprising a slider (8) that can move back and forth to engage and disengage the left fastening part (2, 2') and the right fastening part (2, 2'), The left fastening part (2, 2') is a long part in the front-to-back direction to be sewn directly or via an intermediary with a sewing thread (96) to the left edge of the opening of the article (9) to which the slide fastener (1) is attached, and includes a left mounting surface (2a) provided on one side of the thickness direction perpendicular to the longitudinal direction of the left fastening part (2, 2'), and at least one row of left engaging elements (21-24) in which left engaging elements (30) are arranged along the longitudinal direction of the left fastening part (2, 2'), including at least one row of left engaging elements (21-24) provided on the opposite side of the left mounting surface (2a) in the thickness direction of the left fastening part (2, 2'), the left engaging element (30) protrudes to the right side opposite to the left edge of the opening, The right-side fastening part (2, 2') is a long part in the front-to-back direction to be sewn directly or via an intervening material to the right edge of the opening of the article (9) with a sewing thread (96), and includes a right-side mounting surface (2a) provided on one side of the thickness direction perpendicular to the longitudinal direction of the right-side fastening part (2, 2'), and at least one row of right-side engaging elements (21-24) arranged along the longitudinal direction of the right-side fastening part (2, 2'), including at least one row of right-side engaging elements (21-24) provided on the opposite side of the right-side mounting surface (2a) in the thickness direction of the right-side fastening part (2, 2'), the right-side engaging element (30) protruding to the left side opposite to the right edge of the opening, The slider (8) is a slide fastener having upper and lower wing plates (81, 82) provided at vertical intervals corresponding to the total width of the left and right fastening parts (2, 2') in the width direction perpendicular to the longitudinal direction and the thickness direction.

2. The left fastening part (2, 2') further comprises a left attachment portion (27) extending in the longitudinal direction of the left fastening part (2, 2'), and the left fastening part (2, 2') can be attached to the left edge of the opening of the article (9) directly or via an intermediary at the left attachment portion (27). The slide fastener according to claim 1, wherein the right fastening part (2, 2') further comprises a right attachment portion (27) extending in the longitudinal direction of the right fastening part (2, 2'), and the right fastening part (2, 2') can be attached directly or via an intermediary to the right edge of the opening of the article (9) at the right attachment portion (27).

3. The at least one row of left-side engaging element rows (21-24) includes first and second left-side engaging element rows (21, 22) arranged side by side in the width direction of the left-side fastening part (2, 2'), and the left-side attachment portion (27) is provided between the first and second left-side engaging element rows (21, 22). The slide fastener according to claim 2, wherein the at least one row of right-side engaging elements (21-24) includes first and second right-side engaging elements (21, 22) arranged side by side in the width direction of the right-side fastening part (2, 2'), and the right-side attachment portion (27) is provided between the first and second right-side engaging elements (21, 22).

4. The left attachment portion (27) is formed to be thinner than the left engagement element (30) in the thickness direction of the left fastening part (2, 2'), and / or narrower than either of the first and second left engagement element rows (21, 22) in the width direction of the left fastening part (2, 2'). The slide fastener according to claim 3, wherein the right attachment portion (27) is formed to be thinner than the right engagement element (30) in the thickness direction of the right fastening part (2, 2'), and / or is formed to be narrower than either of the first and second right engagement element rows (21, 22) in the width direction of the right fastening part (2, 2').

5. The left attachment portion (27) includes at least one recess (55) for receiving the stitch (97) of the sewing thread (96) for sewing the left fastening part (2, 2') to the left edge of the opening, The slide fastener according to claim 3, wherein the right attachment portion (27) includes at least one recess (55) for receiving the stitch (97) of the sewing thread (96) for sewing the right fastening part (2, 2') to the right edge of the opening.

6. The at least one recess (55) of the left attachment portion (27) includes a plurality of recesses (55) provided along the longitudinal direction of the left fastening part (2, 2'), and each of the plurality of recesses (55) is elongated in the longitudinal direction of the left fastening part (2, 2'). The slide fastener according to claim 5, wherein the at least one recess (55) of the right attachment portion (27) includes a plurality of recesses (55) provided along the longitudinal direction of the right fastening part (2, 2'), and each of the plurality of recesses (55) is elongated in the longitudinal direction of the right fastening part (2, 2').

7. The at least one row of left-side engaging element rows (21-24) further includes third and fourth left-side engaging element rows (23, 24) that sandwich the first and second left-side engaging element rows (21, 22) in the width direction of the left-side fastening part (2, 2'), wherein the first and third left-side engaging element rows (21, 23) are directly adjacent to the left-side attachment portion (27) with a gap smaller than the left-side attachment portion (27), and the second and fourth left-side engaging element rows (22, 24) are directly adjacent to the left-side attachment portion (27) with a gap smaller than the left-side attachment portion (27). The slide fastener according to claim 3, wherein the at least one row of right-side engaging element rows (21-24) further includes third and fourth right-side engaging element rows (23, 24) that sandwich the first and second right-side engaging element rows (21, 22) in the width direction of the right-side fastening part (2, 2'), and the first and third right-side engaging element rows (21, 23) are directly adjacent to the right-side attachment portion (27) with a gap smaller than the right-side attachment portion (27), and the second and fourth right-side engaging element rows (22, 24) are directly adjacent to the right-side attachment portion (27) with a gap smaller than the right-side attachment portion (27).

8. The left-side engaging element (30) includes a first base (41), a first neck (42), and a first head (43). The slide fastener according to claim 1, wherein the right-side engaging element (30) includes a second base (41), a second neck (42), and a second head (43).

9. The left-side engaging element (30) further includes shoulder protrusions (44) provided on both sides of the first neck portion (42) and a receiving groove (45) that receives the shoulder protrusions (44) of the right-side engaging element (30), The slide fastener according to claim 8, wherein the right-side engaging element (30) further includes shoulder protrusions (44) provided on both sides of the second neck portion (42) and a receiving groove (45) for receiving the shoulder protrusions (44) of the left-side engaging element (30).

10. The left fastening part (2, 2') further comprises a left substrate (40), and each left engagement element (30) of the at least one row of left engagement elements (21-24) is connected to the left substrate (40). The slide fastener according to claim 8, wherein the right fastening part (2, 2') further comprises a right substrate (40), and each right engaging element (30) of the at least one row of right engaging elements (21-24) is connected to the right substrate (40).

11. The left fastening part (2, 2') further comprises a left attachment portion (27) for mounting the left fastening part (2, 2'), and each left engagement element (30) of the at least one row of left engagement elements (21-24) is connected to the left attachment portion (27). The slide fastener according to claim 8, wherein the right fastening part (2, 2') further comprises a right attachment portion (27) for mounting the right fastening part (2, 2'), and each right engagement element (30) of the at least one row of right engagement elements (21-24) is connected to the right attachment portion (27).

12. The left-side attachment portion (27) includes a reinforcing material (28), or the reinforcing material (28) is fixed to the left-side attachment portion (27). The slide fastener according to claim 11, wherein the right-side attachment portion (27) includes a reinforcing material (28), or the reinforcing material (28) is fixed to the right-side attachment portion (27).

13. The left fastening part (2, 2') is bendable to follow the deformation of the left edge of the opening when attached to the left edge of the opening. The slide fastener according to any one of claims 1 to 7, wherein the right-side fastening part (2, 2') is bendable to follow the deformation of the right edge of the opening when attached to the right edge of the opening.

14. Left fastening part (2, 2') and Right-side fastening part (2,2') and A slide fastener (1) comprising a slider (8) that can move back and forth to engage and disengage the left fastening part (2, 2') and the right fastening part (2, 2'), The left fastening part (2, 2') is a long part in the front-to-back direction to be sewn directly or via an intermediary with a sewing thread (96) to the left edge of the opening of the article (9) to which the slide fastener (1) is attached, and includes a left mounting surface (2a) provided on one side of the thickness direction perpendicular to the longitudinal direction of the left fastening part (2, 2'), and at least one row of left engaging elements (21-24) in which left engaging elements (30) are arranged along the longitudinal direction of the left fastening part (2, 2'), including at least one row of left engaging elements (21-24) provided on the opposite side of the left mounting surface (2a) in the thickness direction of the left fastening part (2, 2'), the left engaging element (30) protrudes to the right side opposite to the left edge of the opening, The right-side fastening part (2, 2') is a long part in the front-to-back direction to be sewn directly or via an intervening material to the right edge of the opening of the article (9) with a sewing thread (96), and includes a right-side mounting surface (2a) provided on one side of the thickness direction perpendicular to the longitudinal direction of the right-side fastening part (2, 2'), and at least one row of right-side engaging elements (21-24) arranged along the longitudinal direction of the right-side fastening part (2, 2'), including at least one row of right-side engaging elements (21-24) provided on the opposite side of the right-side mounting surface (2a) in the thickness direction of the right-side fastening part (2, 2'), the right-side engaging element (30) protruding to the left side opposite to the right edge of the opening, The left fastening part (2, 2') further comprises a plurality of left slits (S1, S2) extending in the width direction perpendicular to the longitudinal and thickness directions of the left fastening part (2, 2'), and each of the plurality of left slits (S1, S2) is located between adjacent left engaging elements (30) in the longitudinal direction of the left fastening part (2, 2'). The right-side fastening part (2, 2') further comprises a plurality of right-side slits (S1, S2) extending in a width direction perpendicular to the longitudinal and thickness directions of the right-side fastening part (2, 2'), and each of the plurality of right-side slits (S1, S2) is located between adjacent right-side engaging elements (30) in the longitudinal direction of the right-side fastening part (2, 2'), forming a slide fastener.

15. Each of the plurality of left-side slits (S1, S2) is formed to have a length exceeding half the width of the left-side fastening part (2, 2'), The slide fastener according to claim 14, wherein each of the plurality of right-side slits (S1, S2) is formed to have a length exceeding half the width of the right-side fastening part (2, 2').

16. Left fastening part (2, 2') and Right-side fastening part (2,2') and A slide fastener (1) comprising a slider (8) that can move back and forth to engage and disengage the left fastening part (2, 2') and the right fastening part (2, 2'), The left fastening part (2, 2') is a long part in the front-to-back direction to be sewn directly or via an intermediary with a sewing thread (96) to the left edge of the opening of the article (9) to which the slide fastener (1) is attached, and includes a left mounting surface (2a) provided on one side of the thickness direction perpendicular to the longitudinal direction of the left fastening part (2, 2'), and at least one row of left engaging elements (21-24) in which left engaging elements (30) are arranged along the longitudinal direction of the left fastening part (2, 2'), including at least one row of left engaging elements (21-24) provided on the opposite side of the left mounting surface (2a) in the thickness direction of the left fastening part (2, 2'), the left engaging element (30) protrudes to the right side opposite to the left edge of the opening, The right-side fastening part (2, 2') is a long part in the front-to-back direction to be sewn directly or via an intervening material to the right edge of the opening of the article (9) with a sewing thread (96), and includes a right-side mounting surface (2a) provided on one side of the thickness direction perpendicular to the longitudinal direction of the right-side fastening part (2, 2'), and at least one row of right-side engaging elements (21-24) arranged along the longitudinal direction of the right-side fastening part (2, 2'), including at least one row of right-side engaging elements (21-24) provided on the opposite side of the right-side mounting surface (2a) in the thickness direction of the right-side fastening part (2, 2'), the right-side engaging element (30) protruding to the left side opposite to the right edge of the opening, A slide fastener wherein the left mounting surface (2a) is provided with at least one guide projection (51, 52), and the at least one guide projection (51, 52) is located away from both ends of the left fastening part (2, 2') in the width direction perpendicular to the longitudinal and thickness directions of the left fastening part (2, 2').

17. The process involves attaching a fastening part (2, 2') for a slide fastener to the fabric at a position away from the side edge (95) of the fabric and along the side edge (95), wherein the fastening part (2, 2') extends elongated along the side edge (95) of the fabric and includes a mounting surface (2a) provided on one side in the thickness direction perpendicular to the longitudinal direction of the fastening part (2, 2'), and a row of engaging elements (21-24) in which engaging elements (30) are arranged along the longitudinal direction of the fastening part (2, 2'), including a row of engaging elements (21-24) provided on the opposite side of the mounting surface (2a) in the thickness direction of the fastening part (2, 2'), wherein each engaging element (30) is provided standing upright on the side opposite to the fabric, A method for manufacturing a fabric with fastening parts for a slide fastener, comprising the step of folding the fabric to form a folded end to which the fastening parts (2, 2') are attached or to which they are to be attached.

18. The method for manufacturing a fabric with fastening parts for a slide fastener according to claim 17, wherein the step of attaching the fastening parts (2, 2') to the fabric includes the step of sewing the fastening parts (2, 2') to the fabric with sewing thread (96), and thereafter the fabric is folded back and the fastening parts (2, 2') are rotated.

Images