Fastening device and method for producing same

Abstract

A slider (3) has a first coupling part (31) that is coupled to a first fastening part (1) from a first engagement surface (1n) side, and the slider (3) can be coupled to the first fastening part (1) from the first engagement surface (1n) side on the basis of deformation of the first fastening part (1) and / or the first coupling part (31).

Description

Fastening device and method for manufacturing the same

[0001] The present disclosure relates to a fastening device and a method for manufacturing the same.

[0002] There is a need to fasten portions to be overlapped. A representative example of the fastening device used for this purpose is a snap button, but it is a local or point fastening, and a large number of snap buttons need to be arranged for continuous fastening. A surface fastener is also used in this application, but it is only used in applications where simpler or quicker fastening and release of fastening are desired as compared with snap buttons.

[0003] Patent Document 1 discloses sewing first and second stringers to first and second fabric materials and attaching a slider to a row of meshing members of these opposing stringers. Each stringer has an array of meshing members and a connecting material that holds the meshing members. The meshing members are fitted to the connecting material (pages 2, column 3, lines 16 to 18 of the same document). As shown in FIG. 3 of the same document, the meshing members have a semi-mushroom shape with a vertical portion and teeth.

[0004] Patent Document 2 discloses a method of fixing an engaging element using a sewing thread. Patent Document 3 discloses a fastening device in which a tape portion and a fastening portion are integrally formed, and FIG. 20 of the same document also discloses a slider. Patent Document 4 discloses a fastening device with enhanced airtightness.

[0005] Japanese Patent Publication No. 49-37964, Japanese Patent Publication No. 57-53724, Patent No. 6947829, US Patent Application Publication No. 2020 / 0008542

[0006] Patent documents 1 and 2 disclose the use of long fastening parts. Such fastening parts can be engaged by applying pressure with the thumb, for example. However, the longer the fastening device, the greater the workload and time required. In this regard, Patent Document 1 also discloses the use of a slider. In this document, the slider is attached so as not to easily fall off the upper and lower stringers. However, in this case, it is necessary to thread the upper and lower stringers through the slider from their ends. For example, if the upper and lower stringers are pre-sewn to the upper and lower fabrics, this operation requires skill.

[0007] The inventors of the present invention conceived of this invention in contrast to the conventional practice of attaching sliders in a way that prevents them from falling off, in relation to fastening devices used to fasten overlapping portions together.

[0008] A fastening device according to one aspect of the present disclosure includes a first row of engagement elements, a long first fastening part including a first engagement surface on which each first engagement element of the first row of engagement elements is erected, and a first fixed surface opposite to the first engagement surface, a second row of engagement elements, a long second fastening part including a second engagement surface on which each second engagement element of the second row of engagement elements is erected, and a second fixed surface opposite to the second engagement surface, and a slider that is forward-movable to engage the individual first engagement elements in the first row of engagement elements and the individual second engagement elements in the second row of engagement elements in an alternating manner. The slider has a first coupling portion that connects to the first fastening part from the first engagement surface side, and the slider can be coupled to the first fastening part from the first engagement surface side based on the deformation of the first fastening part and / or the first coupling portion. Advantageously, the slider can be snap-connected to the first fastening part from the first engagement surface side based on the elastic deformation of the first fastening part and / or the first joint.

[0009] In some embodiments, the first coupling portion has a first opening through which two or more first engaging elements included in the first engaging element row are at least partially received within the slider.

[0010] In some embodiments, the slider includes a separator column, a first side plate, and a second side plate, with a first passage for a first fastening part and a second passage for a second fastening part arranged on either side of the separator column, and the first and second passages merging behind the separator column.

[0011] In some embodiments, the slider is configured such that the first and second passages are formed asymmetrically.

[0012] In some embodiments, the first passage extends in a straight line, and the second passage is inclined to the first passage at an acute angle of 45° or less.

[0013] In some embodiments, the separation column has a first surface oriented so that a first fastening part is fed linearly into the slider, and a second surface oriented so that a second fastening part is fed diagonally into the slider.

[0014] In some embodiments, the slider further includes a pair of protrusions that prevent the first fastening part from falling out of the first passage or the second fastening part from falling out of the second passage.

[0015] In some embodiments, the first fastening part includes first and second guide flanges extending continuously in the front-rear direction, and the first coupling part has first and second engagement grooves into which the first and second guide flanges are individually inserted and engaged.

[0016] In some embodiments, the first fastening part further includes a connecting portion through which individual first engaging elements are connected, and the first and second guide flanges are provided in a plane offset from the plane on which the connecting portion is located toward the top surface of each first engaging element in the row of first engaging elements.

[0017] In some embodiments, the first coupling portion includes first and second engagement flanges extending continuously or intermittently in the front-rear direction, and the first fastening part has first and second guide grooves into which the first and second engagement flanges are individually inserted and engaged.

[0018] In some embodiments, the slider has a second coupling portion that connects to the second fastening part from the second engagement surface side, and the slider can be coupled to the second fastening part from the second engagement surface side based on deformation of the second fastening part and / or the second coupling portion.

[0019] In some embodiments, the slider has a second coupling portion that connects to the second fastening part from the second engagement surface side, and the second coupling portion is configured such that the slider cannot be snap-connected to the second fastening part from the second engagement surface side.

[0020] In some embodiments, the second fastening part includes third and fourth guide flanges extending continuously in the front-rear direction, and the second coupling part has third and fourth engagement grooves into which the third and fourth guide flanges are individually inserted and engaged.

[0021] In some embodiments, the first coupling portion includes one of a male-female snap coupling structure, and the first fastening part includes the other of a male-female snap coupling structure.

[0022] In some embodiments, the slider has a second coupling portion that connects to a second fastening part from the second engagement surface side, the second coupling portion includes one of a male-female snap coupling structure, and the second fastening part includes the other of a male-female snap coupling structure.

[0023] In some embodiments, the first and second fastening parts are identical resin molded products formed from a single resin material.

[0024] In some embodiments, the first and second fastening parts have the same structure at least on the first engagement surface side, and are used such that the direction of protrusion of the engagement projection of each first engagement element in the first engagement element row is opposite to the direction of protrusion of the engagement projection of each second engagement element in the second engagement element row.

[0025] A method for manufacturing a fastening device according to another aspect of the present disclosure comprises: a first fastening part comprising a row of first engaging elements, a first engaging surface on which each first engaging element of the row of first engaging elements is erected, and a first fixed surface opposite to the first engaging surface; a second fastening part comprising a row of second engaging elements, a second engaging surface on which each second engaging element of the row of second engaging elements is erected, and a second fixed surface opposite to the second engaging surface; and a slider that is movable forward to engage the individual first engaging elements in the row of first engaging elements with the individual second engaging elements in the row of second engaging elements in an alternating manner. A method for manufacturing a fastening device, comprising the steps of connecting a first coupling portion of a slider to a first fastening part and connecting a second coupling portion of a slider to a second fastening part, wherein the first coupling portion is connected to the first fastening part from the first engagement surface side, and in the process of this connection, the first fastening part and / or the first coupling portion deforms, and / or the second coupling portion is connected to the second fastening part from the second engagement surface side, and in the process of this connection, the second fastening part and / or the second coupling portion deforms.

[0026] In some embodiments, the above-described manufacturing method further includes the step of manufacturing the first and second fastening parts using an extruder and one or more die wheels.

[0027] According to one aspect of this disclosure, a fastening device used for fastening overlapping portions can be easily attached to first and second fastening parts.

[0028] This is a schematic top view of left and right fabric materials fastened via a fastening device according to one aspect of the present disclosure. This is a schematic cross-sectional view along the dashed line II-II in Figure 1. This is a schematic cross-sectional view along the dashed line III-III in Figure 1. This is a schematic cross-sectional view of the fastening device at a position offset to the right or left from the center line shown in Figure 1, schematically showing the situation in which the first and second engaging elements engage alternately as the slider moves forward, or the engagement of the first and second engaging elements is released as the slider moves backward. This is a schematic partial perspective view of the fastening part. This is a schematic perspective view of the slider, schematically showing the first and second grooves formed on the inner surface of the first side plate with dotted lines. This is a schematic central cross-sectional view of the fastening device. This is a schematic central cross-sectional view of the fastening device, showing the state before the slider is coupled (e.g., snap-coupled) to the first fastening part. This is a process diagram relating to the assembly of the fastening device. This is a schematic perspective view of a slider according to a modified example. This is a schematic diagram showing a method for manufacturing fastening parts. This is a schematic diagram showing another method for manufacturing fastening parts. This is a schematic diagram showing the first and second fastening parts according to the second embodiment. This is a schematic diagram showing a fastening device according to the second embodiment. This is a process diagram for assembling the fastening device according to the second embodiment. This is a schematic perspective view of a slider according to the second embodiment. This is a schematic perspective view of a slider according to a modified example. This is a schematic diagram showing a fastening device according to the third embodiment. This is a process diagram for assembling the fastening device according to the third embodiment. This is a schematic perspective view of the slider according to the third embodiment, seen from diagonally above. This is a schematic perspective view of the slider shown in Figure 18, seen from diagonally below. This is a schematic diagram showing a fastening device according to the fourth embodiment. This is a process diagram showing the assembly method of the fastening device according to the fourth embodiment. This is a schematic perspective view of the slider according to the fourth embodiment, seen from diagonally above. This is a schematic perspective view of the slider shown in Figure 22, seen from diagonally below.

[0029] The following describes various embodiments and features 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 can be understood. Duplication of explanation between embodiments will be omitted in principle. The reference drawings are primarily for describing the invention and have been simplified for ease of drawing.

[0030] For the sake of explanation, this specification assumes that the longitudinal direction of the fastening device (and fastening parts) coincides with the front-to-back direction, its width coincides with the left-to-right direction, and its thickness coincides with the up-to-down direction. The front-to-back direction coincides with the direction of movement of the slider. The left-to-right direction coincides with the width direction of the slider. The up-to-down direction coincides with the thickness direction of the slider. Naturally, unless explicitly stated otherwise, the up-to-down direction does not need to coincide with the vertical direction (direction of gravity). Members with the same name may be distinguished by being named 1st, 2nd, 3rd, 4th, etc., but this should not be interpreted as limiting the number of such members. In some cases, distinguishing terms such as 1st, 2nd, etc. may not be used to give a more comprehensive meaning.

[0031] As shown in Figures 1 to 3, the fastening device 9 can be used to fasten left and right fabric pieces 7p and 7q of the same or different fabric material, and in particular, it can be used to fasten their opposing surfaces together. The fastening device 9 includes first and second fastening parts 1 and 2, and a slider 3. The left and right fabric pieces 7p and 7q have overlapping side edges 7m and 7n, and the first and second fastening parts 1 and 2 are fixed to the opposing surfaces of the side edges 7m and 7n, respectively, by any method such as sewing, bonding, or welding. Fastening via the fastening device 9 is also possible on other opposing parts of the fabric pieces 7p and 7q other than the side edges 7m and 7n.

[0032] It should be understood that there are no limitations on the objects to be fastened via the fastening device 9. The fastening device 9 can be used to fasten flexible materials together, flexible materials together with non-flexible materials (e.g., mechanical elements), and mechanical elements together with other mechanical elements. Flexible materials include, for example, fabrics, natural or artificial leather, and flexible sheets made of resin or metal. Non-flexible materials are any material that is less flexible than flexible materials, such as mechanical elements. Mechanical elements can be any structural parts such as frames, links, gears, and racks. In the exemplary example, the fastening device 9 is used to fasten upholstery material attached to the body of a seat in a moving object such as an automobile, airplane, or motorcycle, where at least one of the objects to be fastened is a flexible material.

[0033] The first and second fastening parts 1 and 2 can engage with each other with or without the slider 3, and can also be disengaged after engagement. As can be seen from Figure 1, the first and second fastening parts 1 and 2 are covered and hidden by the fabric material 7q. When the fabric materials 7p and 7q are fastened with the fabric material 7q moved further to the left, the slider 3 is also covered and hidden by the fabric material 7q. In this way, the fastening device 9 is less visible on the outside compared to a typical concealed slide fastener, making it suitable for applications where concealment is desired. Furthermore, the first and second fastening parts 1 and 2 are thin parts, and even in the engaged state, their thickness is less than twice the maximum thickness of the individual parts. Therefore, even if the fastening device 9 is interposed between the fabric materials 7p and 7q, the thickness is likely to remain within an acceptable range.

[0034] The first and second fastening parts 1 and 2 are both flexible materials that extend to a long length with a predetermined width, and are typically narrower than the slider 3. The first and second fastening parts 1 and 2 can be manufactured by continuous molding, as opposed to injection molding, which can help reduce the cost of the fastening device 9. Furthermore, the fastening parts can be manufactured to a very long length and then cut to any desired length, and for example, the cutting can be performed at the site where the object is fastened using the fastening device 9. The slider 3 is made of metal or resin and can be manufactured by die-casting or injection molding.

[0035] The explanation will be given with reference to Figures 1 to 5. The first fastening part 1 includes a first engagement element row L1, a first engagement surface 1n on which each first engagement element E1 of the first engagement element row L1 is erected, and a first fixed surface 1m opposite to the first engagement surface 1n. The second fastening part 2, similar to the first fastening part 1, includes a second engagement element row L2, a second engagement surface 2n on which each second engagement element E2 of the second engagement element row L2 is erected, and a second fixed surface 2m opposite to the second engagement surface 2n. The first fastening part 1 is long at least in the row direction of the first engagement element row L1 (i.e., the arrangement direction of the first engagement elements E1), and optionally has high flexibility in the same direction, is bendable and flexible at any position, and is also capable of torsional deformation. The same applies to the second fastening part 2.

[0036] The first and second fastening parts 1 and 2 are used such that the direction of protrusion of the engagement projection of each first engagement element E1 in the first engagement element row L1 is opposite to the direction of protrusion of the engagement projection of each second engagement element E2 in the second engagement element row L2, but they have the same structure. Therefore, in principle, the description of the first fastening part 1 applies directly to the second fastening part 2, and redundant explanations are omitted. Typically, the first and second fastening parts 1 and 2 are resin molded products of the same structure molded from a single resin material. The first and second fastening parts 1 and 2 only need to have the same structure at least on the first engagement surface 1n side, but they can also have different structures on the first fixing surface 1m side.

[0037] The first fastening part 1 has a width corresponding to the number of rows of engagement elements included in the first engagement element row L1. The first engagement element row L1 consists of one or more rows of engagement elements, in which case the rows of engagement elements are arranged in the width direction of the first fastening part 1, and in the illustrated example, four rows of engagement elements are arranged. In detail, the first engagement element row L1 includes a first pair of two rows of engagement elements and a second pair of two rows of engagement elements, with an intermediate portion 15 provided between these first and second pairs. The intermediate portion 15 can be used as a sewing portion for threads used to fix the first fastening part 1. By forming slits between adjacent first engagement elements E1 in the width direction, the flexibility of the first fastening part 1 is increased, and it can easily bend into a convex or concave shape in the width direction.

[0038] The first fastening part 1 includes a connecting portion 86 through which individual first engaging elements E1 are connected. That is, adjacent first engaging elements E1 in the first engaging element row L1 are connected via the connecting portion 86. The connecting portion 86 is typically a single layer. The first engaging elements E1 and the connecting portion 86 are arranged alternately, and as a result, the first engaging surface 1n is constructed from the collection of the upper surfaces of the connecting portion 86, and the first fixed surface 1m is constructed from the collection of the lower surfaces of the connecting portion 86 and the collection of the lower surfaces of the first engaging elements E1.

[0039] The first engaging element E1 has an inverted J-shape. More specifically, the first engaging element E1 has a base portion 81 and a top portion 82, and the top portion 82 includes an engaging projection 83 that protrudes in either the front or rear direction compared to the base portion 81. A space 84 is formed between the engaging projection 83 and the connecting portion 86 to receive the engaging projection of the second engaging element E2, which is the engaging partner. The direction of protrusion of the protrusions can also be reversed between rows of engaging elements.

[0040] The first fastening part 1 may have grooves 87 recessed in the first fixed surface 1m at the same or different pitch as the pitch of the first engaging element E1, thereby increasing the flexibility of the first fastening part 1. Each groove 87 is formed over the entire width of the first fastening part 1 and opens at the left and right ends of the first fastening part 1. Preferably, the grooves 87 are formed so as to partially hollow the base portion 81 of the first engaging element E1. When the above-mentioned intermediate portion 15 is provided, the intermediate portion 15 is formed with an alternating arrangement of inverted U-shaped portions 15p and single-layer portions 15q in which grooves 87 are formed. The inverted U-shaped portions 15p connect adjacent first engaging elements E1 in the width direction, thereby increasing the mechanical strength.

[0041] The above explanation also applies to the second fastening part 2, provided that appropriate substitutions are made (for example, replacing the first engaging element E1 with the second engaging element E2), and redundant explanations are omitted.

[0042] The first and second fastening parts 1 and 2 are engaged by the forward movement of the slider 3 (see Figure 4). In short, as the slider 3 moves forward, the individual first engaging elements E1 included in the first engaging element row L1 and the individual second engaging elements E2 included in the second engaging element row L2 engage in an alternating manner. In some cases, the individual first engaging elements E1 and the individual second engaging elements E2 engage in a manner that allows for disengagement, while in other cases, the individual first engaging elements E1 and the individual second engaging elements E2 engage in a manner that prevents disengagement. Regarding the feature of disengagement, it is sufficient if the first and second engaging elements E1 and E2 interlock in an alternating manner without deformation or interference at the position behind the separation column 33 of the slider 3, as described later. Regarding the feature of non-disengagement, it is sufficient if the first and second engaging elements E1 and E2 interlock in an alternating manner after deformation or interference at the position behind the separation column 33 of the slider 3, as described later. The shapes of the first and second engaging elements E1 and E2 can be optimally designed for each embodiment.

[0043] The slider 3 includes a separation column 33, a first side plate 34, a second side plate 35, and a handle attachment portion 36. The first and second side plates 34, 35 are arranged to face each other at intervals in the width direction of the slider 3, and define the passage widths of the first passage C1 for the first fastening part 1 and the second passage C2 for the second fastening part 2. The first and second side plates 34, 35 are connected via a separation column 33 extending in the width direction of the slider 3, and the first passage C1 and the second passage C2 are arranged sandwiching the separation column 33 (on both the upper and lower sides thereof). The separation column 33 is provided at the front part of the slider 3 and not provided at the rear part thereof. That is, the separation column 33 connects the front parts of the first and second side plates 34, 35 and does not connect the rear parts of the first and second side plates 34, 35. Therefore, the first and second passages C1, C2 merge behind the separation column 33.

[0044] The separation column 33 has a wedge-shaped cross-sectional shape with a gradually decreasing thickness toward the rear, and also has a first surface 33a, a second surface 33b, and a front surface 33c. The first surface 33a is a guide surface for the first engaging element E1, and the top surface of the first engaging element E1 slides thereon. The second surface 33b is a guide surface for the second engaging element E2, and the top surface of the second engaging element E2 slides thereon. The front surface 33c is a surface to which a semi-ring-shaped handle attachment portion 36 is connected, but this is not necessarily the case (for example, in the case shown in FIG. 10, the handle attachment portion 36 is provided on the outer surface of the first side plate 34). The first surface 33a is connected to the lower end of the front surface 33c and extends rearward therefrom. The second surface 33b is connected to the upper end of the front surface 33c and extends rearward therefrom.

[0045] The first surface 33a is oriented so that the first fastening part 1 is linearly fed into the slider 3, and is oriented parallel to, for example, the first passage C1 (which is linear as described later). The second surface 33b is oriented so that the second fastening part 2 is obliquely fed into the slider 3, and is oriented parallel to, for example, the second passage C2 (which is inclined as described later), and more specifically, may be inclined to form an acute angle of 45° or less with respect to the first surface 33a. The vertical interval between the first surface 33a and the second surface 33b gradually decreases toward the rear. Thereby, as described later, the engagement operation of the first and second fastening parts 1, 2 by the slider 3 is smoothed.

[0046] The slider 3 has first and second coupling portions 31 and 32 that couple to the first and second fastening parts 1 and 2. The first coupling portion 31 has a first opening OP1 (see FIG. 6), through which two or more first engaging elements E1 included in the first engaging element row L1 are at least partially received within the slider 3. The first opening OP1 can extend linearly between the opening ends on both the front and rear sides thereof. The first coupling portion 31 includes a substantially U-shaped configuration at the front portion of the slider 3, and includes a separation column 33, a lower portion of the front portion of the first side plate 34, and a lower portion of the front portion of the second side plate 35. At the rear portion of the slider 3, the first coupling portion 31 also includes the rear portions of the first side plate 34 and the second side plate 35 that are spaced apart in the width direction of the slider 3 and are oriented parallel to each other.

[0047] The second coupling portion 32 has a second opening OP2 (see FIG. 6), through which two or more second engaging elements E2 included in the second engaging element row L2 are at least partially received within the slider 3. The second opening OP2 can extend linearly between the opening ends on both the front and rear sides thereof. The second coupling portion 32 includes a substantially U-shaped configuration that is upside down with respect to the first coupling portion 31 at the front portion of the slider 3, and includes a separation column 33, an upper portion of the front portion of the first side plate 34, and an upper portion of the front portion of the second side plate 35. At the rear portion of the slider 3, the second coupling portion 32 also includes the rear portions of the first side plate 34 and the second side plate 35 that are spaced apart in the width direction of the slider 3 and are oriented parallel to each other. Incidentally, the first and second side plates 34 and 35 are disposed on both the left and right sides of the first opening OP1, define the opening width thereof, and are disposed on both the left and right sides of the second opening OP2, define the opening width thereof.

[0048] At the rear portion of the slider 3, the first engaging element E1 and the second engaging element E2 are alternately engaged so that the first and second fastening parts 1 and 2 are laminated and the thickness in the lamination direction is reduced. Therefore, it can be understood that the first and second coupling portions 31 and 32 are provided in a superimposed manner at the rear portion of the slider 3. The front and rear portions of the first side plate 34 are divided with the rear end of the separation column 33 as a boundary, and the same applies to the second side plate 35. The upper and lower portions of the front portion of the first side plate 34 are divided with the separation column 33 as a boundary.

[0049] The slider 3 has front openings at the upper and lower positions of the separation column 33, and a rear opening at the rear position of the separation column 33. The lower front opening coincides with the front end of the first passage C1, and through this, the portion of the first fastening part 1 located in front of the slider 3 is fed into the first passage C1 when the slider 3 moves forward. The upper front opening coincides with the front end of the second passage C2, and through this, the portion of the second fastening part 2 located in front of the slider 3 is fed into the second passage C2 when the slider 3 moves forward. The rear opening coincides with the rear ends of the first and second passages C1 and C2 which merge behind the separation column 33, and through this, the portions of the first and second fastening parts 1 and 2 that engage and stack behind the separation column 33 exit the slider 3.

[0050] Preferably, the slider 3 is configured such that the first and second passages C1 and C2 are formed asymmetrically. This facilitates the implementation of the fastening device 9 in a manner more suited to individual applications (or individual fastening objects). More specifically, the first and second passages C1 and C2 may be formed asymmetrically with respect to a plane set at a position half the maximum thickness of the slider 3, i.e., they are not mirror-symmetric with respect to that plane. The slider 3 may typically have its maximum thickness at its front or front end (excluding the pull tab mounting portion 36).

[0051] In some cases, the first passage C1 is a linearly extending, so-called horizontal passage. In contrast, the second passage C2 is inclined to form an acute angle of 45° or less with respect to the first passage C1, so-called inclined passage. Corresponding to these, the separation column 33 has a first surface 33a and a second surface 33b oriented as described above. In this case, when the slider 3 is moved to engage the first and second fastening parts 1 and 2, the slider 3 can slide linearly along the first fastening part 1. The first fastening part 1 functions as a rail supporting the slider 3, thereby stabilizing the movement of the slider 3. As the slider 3 moves forward, the first fastening part 1 is fed linearly into the first passage C1, and the second fastening part 2 is fed diagonally into the second passage C2 and pulled towards the first fastening part 1, so that the first engaging element E1 and the second engaging element E2 engage alternately behind the separation column 33. By linearly feeding the first fastening part 1 into the slider 3, smooth fastening by the fastening device 9 can be ensured even when the first fastening part 1 is fixed (e.g., sewn) to an object with low flexibility (e.g., fabric attached to the skeletal structure of the seat body). Additionally or alternatively, the mechanism for moving the slider 3 can be simplified (e.g., a linear guide can be used).

[0052] In this embodiment, the first connecting portion 31 is connected to the first fastening part 1 from the first engagement surface 1n side, and the slider 3 can be connected to the first fastening part 1 from the first engagement surface 1n side based on the deformation of the first fastening part 1 and / or the first connecting portion 31. The slider can be easily attached to the first and second fastening parts 1 and 2. Preferably, the slider 3 can be snap-connected to the first fastening part 1 from the first engagement surface 1n side based on the elastic deformation of the first fastening part 1 and / or the first connecting portion 31.

[0053] Ideally, prior to assembling the fastening device 9, the first fastening part 1 is fixed to the first object to be fastened, such as the fabric material 7p, and the second fastening part 2 is fixed to the second object to be fastened, such as the fabric material 7q. It is not always easy to pass the first fastening part 1 through the slider 3 from its end while it is fixed to the fabric material 7p, and the same applies to the second fastening part 2. According to the characteristics of the above-described connection (for example, a snap connection), the slider 3 can be easily attached to the first fastening part 1 even while it is fixed to the fabric material 7p. The same applies when the snap connection target of the slider 3 is the second fastening part 2. The same explanation also applies to fastening objects other than the fabric materials 7p and 7q.

[0054] While not limited to this procedure, as shown in Figure 7, to connect the slider 3 to both the first and second fastening parts 1 and 2, the slider 3 can be attached to the second fastening part 2 as shown in Figure 8, and then snap-connected to the first fastening part 1. The snap-connection of the slider 3 to the first fastening part 1 can be done at any position on the first fastening part 1. The first and second fastening parts 1 and 2 can be manually engaged behind the slider 3, and the slider 3 can be snap-connected to the first fastening part 1 at the attachment position of the slider 3. Of course, the slider 3 can also be snap-connected at the end of the first fastening part 1.

[0055] In the case of snap connections, it becomes more difficult or impossible to completely prevent the slider 3 from detaching from the first and second fastening parts 1 and 2. However, this allows for a rapid transition from the engaged state shown in Figure 7 to the disengaged state shown in Figure 8, i.e., a quick release, which, depending on the application, can result in an improved product value.

[0056] In Figure 7, the slider 3 is attached to the second fastening part 2 by passing the end of the second fastening part 2 through the second passage C2 of the slider 3, but it can also be done in the same way as the slider 3 is attached to the first fastening part 1. In this case, the second connecting part 32 is attached to the second fastening part 2 from the second engagement surface 2n side, and the slider 3 can be attached to the second fastening part 2 from the second engagement surface 2n side (for example, by snap-fitting) based on the deformation (for example, elastic deformation) of the second fastening part 2 and / or the second connecting part 32.

[0057] In the various embodiments described above, there is a non-zero possibility that the slider 3 may detach from the first and / or second fastening parts 1 and 2. Considering this, the fastening device 9 is suitable for applications where detachment is acceptable or even desirable. For example, applications where numerous opening and closing cycles are not expected, where unfastening after the initial fastening is undesirable, and where removal of the slider 3 after the initial fastening is desirable are conceivable. Specific examples include fastening of upholstery materials attached to the main body of seats in mobile vehicles such as automobiles, airplanes, and motorcycles. Of course, it is also likely to be useful in applications where numerous opening and closing cycles are expected. Even if the slider 3 detaches, the first and second fastening parts 1 and 2 can be easily returned to an engaged state by manual pressure from above and below. Therefore, even if the slider 3 detaches and is lost, opening and closing operations are still possible.

[0058] Furthermore, in applications where the slider 3 cannot be detached from the first and second fastening parts 1 and 2, the second connecting portion 32 of the slider 3 is configured such that the slider 3 cannot be snap-connected to the second fastening part 2 from the second engagement surface 2n side. That is, the second fastening part 2 can only be connected to the slider 3 by passing it through its end into the slider 3. Even if the slider 3 detaches from the first fastening part 1, it will not detach from the second fastening part 2. In this case as well, it is possible to achieve both easy attachment of the slider 3 and prevention of the slider 3 detachment (albeit to a reduced degree).

[0059] The snap connection of the slider 3 to the first fastening part 1 from the first engagement surface 1n side is based on the elastic deformation of the first fastening part 1 and / or the first connecting part 31. In the form in which the first fastening part 1 is elastically deformed, the first fastening part 1 may include first and second guide flanges 41, 42 that extend continuously in the front-rear direction (see Figure 5). The first connecting part 31 may have first and second engagement grooves 51, 52 into which the first and second guide flanges 41, 42 are individually inserted and engaged (see Figures 6 and 9). In the illustrated example, the first and second side plates 34, 35 each have first and second engagement grooves 51, 52. Preferably, the guide flanges and engagement grooves may be the (preferably sole) engagement structure that allows sliding between the first fastening part 1 and the slider 3, thereby preventing the slider 3 from falling off the first fastening part 1.

[0060] The first and second guide flanges 41 and 42 are positioned on both sides of the first engagement element row L1 in the width direction of the first fastening part 1. The first and second guide flanges 41 and 42 extend linearly in the longitudinal direction of the first fastening part 1 and project outwards to the opposite side in the width direction, and are ultimately left and right projections that extend long in the front-rear direction. The first and second guide flanges 41 and 42 are coupled to or not coupled to each first engagement element E1 of the first engagement element row L1. The cross-sectional shape of the first and second guide flanges 41 and 42 is not limited to a rectangle, but may be triangular or other shapes. The first and second engagement grooves 51 and 52 may be recessed in the opposing surfaces of the first and second side plates 34 and 35, and extend parallel to the first passage C1 at a position below the separation column 33.

[0061] As shown in Figures 9(A)-(C), the slider 3 (which is pre-connected to the second fastening part 2) is connected to the first fastening part 1 from the first engagement surface 1n side of the first fastening part 1. During this process, the first and second guide flanges 41 and 42 located at the left and right ends of the first fastening part 1 deform elastically or plastically. For example, as shown in Figure 9(B), the first connecting portion 31 of the slider 3 (the lower ends of the first and second side plates 34 and 35) pushes it downward, causing it to bend downward, and further downward pressure on the slider 3 causes it to fit into the first and second engagement grooves 51 and 52 of the slider 3, elastically returning it to its original shape (or a shape very close to its original shape). It is also conceivable that the first and second guide flanges 41 and 42 plastically deform and fit into the first and second engagement grooves 51 and 52.

[0062] When the first and second guide flanges 41 and 42 undergo elastic deformation, it is desirable that the main body of the first fastening part 1 (the part other than the first and second guide flanges 41 and 42) undergoes elastic deformation in whole or in part. In the illustrated example, the first fastening part 1 has a left wall and a right wall 46 and 47 to which the first and second guide flanges 41 and 42 are joined (see Figure 5). A gap is formed between the left wall 46 and the first engagement element row L1, and a gap is formed between the right wall 47 and the first engagement element row L1. Therefore, when the first and second guide flanges 41 and 42 bend downward, the left wall and the right wall 46 and 47 also easily deform together. It is also conceivable that the first and second guide flanges 41 and 42 are connected to another part of the main body of the first fastening part 1 (for example, each first engagement element E1 of the first engagement element row L1).

[0063] In a configuration where the connection of the slider 3 to the first fastening part 1 from the first engagement surface 1n side is based on the deformation of the first connecting portion 31, the first and second side plates 34 and 35 of the slider 3 can be elastically deformed. For example, as shown by the arrows in Figure 9(B), the lower parts of the first and second side plates 34 and 35 below the separation column 33 can deform so as to move away from each other from the center line CL, and then return to their original shape. To promote the partial elastic deformation of the slider 3, the thickness of the first and second side plates 34 and 35 can be made thinner, for example, the lower parts of the first and second side plates 34 and 35 are thinner than their upper parts.

[0064] Similar to the description given with respect to the first fastening part 1, the connection of the slider 3 to the second fastening part 2 from the second engagement surface 2n side (e.g., snap connection) may be based on the deformation (elastic deformation or plastic deformation) of the second fastening part 2 and / or the second connecting part 32.

[0065] For clarification, the second fastening part 2 may include third and fourth guide flanges 43, 44 that extend continuously in the front-rear direction. The second coupling part 32 may have third and fourth engagement grooves 53, 54 into which the third and fourth guide flanges 43, 44 are individually inserted and engage. The third and fourth guide flanges 43, 44 may be arranged on both sides of the second engagement element row L2 in the width direction of the second fastening part 2. The third and fourth guide flanges 43, 44 may extend linearly in the longitudinal direction of the second fastening part 2 and project to the opposite side in the width direction, and at their ends may be left and right projections that extend long in the front-rear direction, but are not limited to this. The third and fourth guide flanges 43, 44 may or may not be coupled to each second engagement element E2 of the second engagement element row L2. The third and fourth engagement grooves 53 and 54 may be recessed into the opposing surfaces of the first and second side plates 34 and 35, and may extend inclined parallel to the second passage C2 from a position above the separation column 33 to a position below it, but are not limited to this.

[0066] In some cases, the thickness TH2 of the third and / or fourth guide flanges 43, 44 is smaller or larger than the thickness TH1 of the first and / or second guide flanges 41, 42 (see Figure 9(C)). In some cases, the thickness TH2 is in the range of 1.2 to 3 times the thickness TH1. In other cases, the thickness TH2 is in the range of 0.4 to 0.8 times the thickness TH1. This allows the mounting strength of the slider 3 to be varied between the first and second fastening parts 1, 2, and even if a force is applied to the first and second fastening parts 1, 2 to separate the slider 3 from the slider 3, the slider 3 can be selectively left on one of them. Typically, the vertical width of the first to fourth engagement grooves 51 to 54 may be set to be slightly larger than the thicknesses TH1 and TH2.

[0067] At the rear of the slider 3 (for example, near the rear end), the third engagement groove 53 merges with the first engagement groove 51 to form a V-shaped groove, and similarly, the fourth engagement groove 54 merges with the second engagement groove 52 to form a V-shaped groove. The V-shaped groove recessed in the inner surface of the first side plate 34 and the V-shaped groove recessed in the inner surface of the second side plate 35 are formed in a mirror-image symmetry. If the slider 3 is made longer in the front-rear direction, an inverted T-shaped groove similar to an inverted T is formed instead of a V-shaped groove ("T" is one of the Japanese katakana characters). The merging of the first engagement groove 51 and the third engagement groove 53 allows the first and third guide flanges 41 and 43 to be stacked and mechanically reinforced, but direct contact between the two is not essential. The same explanation applies to the merging of the second engagement groove 52 and the fourth engagement groove 54.

[0068] The first and second guide flanges 41 and 42 are preferably provided on a plane offset from the plane where the connecting portion 86 is located toward the top surface of each first engaging element E1 of the first engaging element row L1. The first and second guide flanges 41 and 42 can be located on a plane at any height between the plane where the connecting portion 86 is located and the plane where the top surfaces of each first engaging element E1 of the first engaging element row L1 are located. This reduces the total height of the first and second fastening parts 1 and 2 when they are engaged. The same explanation applies to the third and fourth guide flanges 43 and 44.

[0069] The first and second guide flanges 41 and 42 may contact one or both of the upper and lower wall surfaces of the first and second engagement grooves 51 and 52 during the sliding motion of the slider 3. However, because the slider 3 is shorter than the first and second fastening parts 1 and 2, the increase in sliding resistance is minimal. The first and second guide flanges 41 and 42 may also contact the bottom surfaces of the first and second engagement grooves 51 and 52 (surfaces perpendicular to the width direction of the slider 3) during the sliding motion of the slider 3. For similar reasons, the increase in sliding resistance is minimal. The same explanation applies to the third and fourth guide flanges 43 and 44.

[0070] For the continuous molding of fastening parts, the use of one or more die wheels and an extruder, as shown in Figures 11 and 12, is envisioned. In the case shown in Figure 11, molten resin discharged from the extruder 91 is supplied between the first and second die wheels 92 and 93. For example, a molding cavity is formed on the outer circumferential surface of the first die wheel 92 for molding the fastening part from its fixed side. A molding cavity is formed on the outer circumferential surface of the second die wheel 93 for molding the fastening part from its engagement side. The molded product, which has hardened or partially hardened on the outer circumferential surface of the second die wheel 93, is released from the second die wheel 93 at an appropriate position.

[0071] In the case shown in Figure 12, the extruder 94 and the die wheel 95 are positioned opposite each other with a small gap between them, and the molten resin discharged from the extruder 94 is supplied to the outer surface of the die wheel 95. A molding cavity is formed on the outer surface of the die wheel 95 for molding the fastening part from its engagement surface side. The molded product, which has hardened or partially hardened on the outer surface of the die wheel, is released from the die wheel 95 at the appropriate position.

[0072] The following explanation will focus on the differences from the various forms described above. In the following description, it is understood that the same effects are achieved in the same aspects as the various forms described above.

[0073] Even if the guide flange of the fastening part is provided in a different location (see Figures 13 and 14) or omitted (not shown), the slider 3 can be connected to the first fastening part 1 from the first engagement surface 1n side based on the deformation of the first fastening part 1 and / or the deformation of the slider 3 (the same applies to the second fastening part 2).

[0074] The guide flanges and engagement grooves can also be made to protrude and recess in directions different from the width direction of the fastening part (for example, the thickness direction). In the illustrated example, the third and fourth guide flanges 43 and 44 protrude upward, and the third and fourth engagement grooves 53 and 54 are recessed upward. The first and second guide flanges 41 and 42 protrude downward. The first and second engagement grooves 51 and 52 are omitted.

[0075] As shown in Figure 14, the slider 3, or more specifically, the first joint 31, may have a pair of protruding portions 61 and 62 that prevent the first fastening part 1 from falling out of the first passage C1. The protruding portions 61 and 62 are formed to protrude from the first and second side plates 34 and 35 (for example, their first ends) so as to approach each other (i.e., toward the center line CL of the slider 3). By placing the slider 3 on the first fastening part 1 and pushing it downwards, the first fastening part 1 is pushed into the first passage C1. At this time, the protruding portions 61 and 62 deform as shown by the arrows in Figure 14, and / or the first and second side plates 34 and 35 deform as shown by the arrows in Figure 14, and then can return to their original shape. Since the protruding portions 61 and 62 and / or the first and second side plates 34 and 35 return to their original shape, the deformation can be said to be elastic deformation. Advantageously, the protruding portions 61 and 62 have opposing guide surfaces whose spacing decreases as they approach the separation column 33 in the vertical direction, thereby facilitating the connection between the first fastening part 1 and the slider 3.

[0076] As shown in Figure 15, the slider 3 can also be connected to the first fastening part 1 from the first engagement surface 1n side based on the deformation of the first fastening part 1. In Figure 15, first, the right side of the first fastening part 1 is inserted into the first passage C1 of the slider 3, and then the left side of the first fastening part 1 is deformed and introduced into the first passage C1. It is also possible to introduce the first fastening part 1 into the first passage C1 by curving it into a convex shape in the width direction to narrow its width. Other introduction methods are also conceivable.

[0077] Furthermore, the pair of protruding portions 61 and 62 are formed to protrude toward each other so as to define the opening width of the first opening OP1. Preferably, the distance between the pair of protruding portions 61 and 62 is 80% or more of the distance between the opposing surfaces of the first side plate 34 and the second side plate 35, thereby allowing the first opening OP1 to have a sufficient opening width. In addition, each of the pair of protruding portions 61 and 62 can be inserted into the gap between the first fixing surface 1m of the first fastening part 1 and the member to which the first fastening part 1 is fixed. From this viewpoint or another viewpoint, the thickness of the protruding portions 61 and 62 is preferably 8 mm or 5 mm or less.

[0078] When inserting the first fastening part 1 into the first passage C1 of the first joint portion 31 of the slider 3, as shown in Figure 15, significant deformation of the first fastening part 1 may be required. To provide the first fastening part 1 with sufficient elasticity, the first fastening part 1 is manufactured from an appropriate resin material (for example, a thermoplastic resin such as polyamide resin, polyester resin, polypropylene resin, PVC resin, ABS resin, polyethylene resin, or a copolymer thereof).

[0079] The second connecting portion 32 can also have a pair of protruding portions 63 and 64 similar to those described above. However, in the illustrated example, the opening width of the second opening OP2 is too narrow, and therefore the second connecting portion 32 cannot be snap-connected to the second fastening part 2. Of course, the same effect can be obtained by configuring the pair of protruding portions 63 and 64 in the same way as the pair of protruding portions 61 and 62. Figure 16 shows a perspective view of the slider 3 having protruding portions 61 to 64 for reference. Figure 17 shows a modified example in which the position of the pull handle attachment portion 36 is changed compared to Figure 16.

[0080] Figures 18 to 21 show a slider 3, specifically a configuration in which the slider 3 snaps onto the first fastening part 1 from the first engagement surface 1n side based on the elastic deformation of its first coupling portion 31. The first coupling portion 31 includes a first male projection 31j formed continuously or intermittently in the front-rear direction. The first fastening part 1 is formed along its entire length in the longitudinal direction and includes a first female recess 31k into which the first male projection 31j snaps. The slider 3 can be snap-connected to the first fastening part 1 by snapping the first male projection 31j into the first female recess 31k. In the illustrated example, the first female recess 31k is provided at the position of the intermediate portion 15 described above, that is, preferably, rows of engagement elements are formed on both the left and right sides thereof.

[0081] The first male projection 31j is a T-shaped projection including first and second engagement flanges 41', 42' that extend continuously or intermittently in the front-rear direction, preferably formed with adjacent L-shaped wall portions in cross-section. The first female recess 31k has first and second guide grooves 51', 52' into which the first and second engagement flanges 41', 42' are individually inserted and engaged. The first and second guide grooves 51', 52' extend continuously in the front-rear direction. The first and second engagement flanges 41', 42' are left and right projections that protrude from the center line of the slider on the opposite side, and extend continuously or intermittently in the front-rear direction. The second coupling portion 32 can also be snap-connected to the second fastening part 2 by the elastic deformation of the first and second engagement flanges 41', 42' and / or the first female recess 31k. When the first male projection 31j is fitted into the first female recess 31k, the L-shaped walls of the first male projection 31j approach each other, thereby facilitating the snap-fit ​​connection of the first male projection 31j to the first female recess 31k. The first female recess 31k also functions as a guide groove that guides the sliding of the slider 3. It is also possible to reverse the positional relationship between the first male projection 31j and the first female recess 31k between the slider 3 and the first fastening part 1.

[0082] In Figures 22 to 25, the second connecting portion 32 has a T-shaped second male projection 32j similar to the first male projection 31j. The second fastening part 2 has a second female recess 32k similar to the first female recess 31k. The second male projection 32j is a T-shaped projection including third and fourth engaging flanges 43', 44' that extend continuously or intermittently in the front-rear direction, and is preferably formed with adjacent L-shaped wall portions in cross-section. The second female recess 32k has third and fourth guide grooves 53', 54' into which the third and fourth engaging flanges 43', 44' are individually inserted and engaged. It is also possible to reverse the arrangement of the second male projection 32j and the second female recess 32k between the slider 3 and the second fastening part 2.

[0083] The second coupling portion 32 can also be snap-connected to the second fastening part 2 by the elastic deformation of the third and fourth engaging flanges 43', 44' and / or the second female recess 32k. If the flexibility of the first male projection 31j is low, the second male projection 32j is inserted into the second female recess 32k from the end of the second fastening part 2.

[0084] The various embodiments described above also include the following features: The first coupling portion 31 may include one of a male-female snap coupling structure, and the first fastening part 1 may include the other of a male-female snap coupling structure. The second coupling portion 32 may include one of a male-female snap coupling structure, and the second fastening part 2 may include the other of a male-female snap coupling structure. A male projection may be the male part of the male-female snap coupling structure, and a female recess may be the female part of the male-female snap coupling structure. For example, an engaging flange may be included in the male part of the male-female snap coupling structure, and a guide groove that receives it may be included in the female part of the male-female snap coupling structure.

[0085] The fastening device 9 may have front and / or rear fasteners to prevent the slider 3 from falling off the first and second fastening parts 1 and 2. One front fastener may be provided adjacent to one of the front ends of the first and second fastening parts 1 and 2, or two front fasteners may be provided adjacent to both of the front ends of the first and second fastening parts 1 and 2. The front fasteners may be provided integrally with the fastening parts, or they may be fixed to the object (e.g., fabric) by any method (e.g., sewing, bonding, welding). The same description applies to rear fasteners.

[0086] Finally, for the sake of clarity, the following method is also disclosed in this specification: A method for manufacturing the fastening device 9 includes the steps of connecting a first coupling portion 31 of the slider 3 to a first fastening part 1 and connecting a second coupling portion 32 of the slider 3 to a second fastening part 2. The first coupling portion 31 is coupled to the first fastening part 1 from the first engagement surface 1n side (e.g., by snap coupling), and in the process of coupling, the first fastening part 1 and / or the first coupling portion 31 are deformed (e.g., by elastic deformation). Preferably, the second coupling portion 32 is coupled to the second fastening part 2 from the second engagement surface 2n side (e.g., by snap coupling), and in the process of coupling, the second fastening part 2 and / or the second coupling portion 32 are deformed (e.g., by elastic deformation). The first and second fastening parts 1 and 2 can be manufactured using an extruder and one or more die wheels. The slider 3 can be manufactured by die casting or injection molding. The various features of the fastening device 9 described above are equally applicable to the method described in this paragraph.

[0087] Based on the above teachings, those skilled in the art can make various modifications to each embodiment and feature. The reference numerals included in the claims are for reference only and should not be used to limit the scope of the claims.

[0088] 1: First fastening part 1m: First fixing surface 1n: First engaging surface 2: Second fastening part 2m: Second fixing surface 2n: Second engaging surface 3: Slider 9: Fastening device 31: First joint 32: Second joint 33: Separating column 33a: First surface 33b: Second surface 33c: Front surface 34: First side plate 35: Second side plate 36: Handle mounting part 41: First guide flange 42: Second guide flange 51: First engaging groove 52: Second engaging groove 61: Protruding part 62: Protruding part C1: First passage C2: Second passage L1: First engaging element row L2: Second engaging element row OP1: First opening OP2: Second opening

Claims

1. A fastening device (9) comprising: a first row of engagement elements (L1), a long first fastening part (1) including a first engagement surface (1n) on which each first engagement element (E1) of the first row of engagement elements (L1) is erected, and a first fixed surface (1m) opposite to the first engagement surface (1n); a second row of engagement elements (L2), a long second fastening part (2) including a second engagement surface (2n) on which each second engagement element (E2) of the second row of engagement elements (L2) is erected, and a second fixed surface (2m) opposite to the second engagement surface (2n); and a slider (3) that is movable forward to engage the individual first engagement elements (E1) included in the first row of engagement elements (L1) and the individual second engagement elements (E2) included in the second row of engagement elements (L2) in an alternating manner, A fastening device wherein the slider (3) has a first coupling portion (31) that is coupled to the first fastening part (1) from the first engagement surface (1n) side, and the slider (3) can be coupled to the first fastening part (1) from the first engagement surface (1n) side based on the deformation of the first fastening part (1) and / or the first coupling portion (31).

2. The fastening device according to claim 1, wherein the slider (3) can be snap-connected to the first fastening part (1) from the first engagement surface (1n) side based on the elastic deformation of the first fastening part (1) and / or the first connecting part (31).

3. The fastening apparatus according to claim 1 or 2, wherein the first coupling portion (31) has a first opening (OP1) through which two or more first engaging elements (E1) included in the first engaging element row (L1) are at least partially received within the slider (3).

4. The fastening device according to any one of claims 1 to 3, wherein the slider (3) includes a separation column (33), a first side plate (34), and a second side plate (35), and a first passage (C1) for the first fastening part (1) and a second passage (C2) for the second fastening part (2) are arranged on either side of the separation column (33), and the first and second passages (C1, C2) merge behind the separation column (33).

5. The fastening device according to claim 4, wherein the slider (3) is configured such that the first and second passages (C1, C2) are formed asymmetrically.

6. The fastening apparatus according to claim 4 or 5, wherein the first passage (C1) extends in a straight line, and the second passage (C2) is inclined to the first passage (C1) at an acute angle of 45° or less.

7. The fastening apparatus according to any one of claims 4 to 6, wherein the separating column (33) has a first surface (33a) oriented so that the first fastening part (1) is fed linearly into the slider (3), and a second surface (33b) oriented so that the second fastening part (2) is fed diagonally into the slider (3).

8. The fastening device according to any one of claims 4 to 7, wherein the slider (3) further has a pair of protruding parts (61, 62, 63, 64) that prevent the first fastening part (1) from falling out of the first passage (C1) or the second fastening part (2) from falling out of the second passage (C2).

9. The fastening device according to any one of claims 1 to 8, wherein the first fastening part (1) includes first and second guide flanges (41, 42) extending continuously in the front-rear direction, and the first coupling part (31) has first and second engagement grooves (51, 52) into which the first and second guide flanges (41, 42) are individually inserted and engaged.

10. The fastening apparatus according to claim 9, wherein the first fastening part (1) further includes a connecting portion (86) through which the individual first engaging elements (E1) are connected, and the first and second guide flanges (41, 42) are provided on a plane offset from the plane on which the connecting portion (86) is located toward the top surface of each first engaging element (E1) of the first engaging element row (L1).

11. The fastening device according to any one of claims 1 to 8, wherein the first coupling portion (31) includes first and second engagement flanges (41', 42') extending continuously or intermittently in the front-rear direction, and the first fastening part (1) has first and second guide grooves (51', 52') into which the first and second engagement flanges (41', 42') are individually inserted and engaged.

12. The fastening device according to any one of claims 1 to 11, wherein the slider (3) has a second coupling portion (32) that is coupled to the second fastening part (2) from the second engagement surface (2n) side, and the slider (3) can be coupled to the second fastening part (2) from the second engagement surface (2n) side based on deformation of the second fastening part (2) and / or the second coupling portion (32).

13. The fastening device according to any one of claims 1 to 12, wherein the slider (3) has a second coupling portion (32) that is coupled to the second fastening part (2) from the second engagement surface (2n) side, and the second coupling portion (32) is configured such that the slider (3) cannot be snap-coupled to the second fastening part (2) from the second engagement surface (2n) side.

14. The fastening device according to claim 12 or 13, wherein the second fastening part (2) includes third and fourth guide flanges (43, 44) extending continuously in the front-rear direction, and the second coupling part (32) has third and fourth engagement grooves (53, 54) into which the third and fourth guide flanges (43, 44) are individually inserted and engaged.

15. The fastening device according to claim 1, wherein the first coupling portion (31) includes one of a male-female snap coupling structure, and the first fastening part (1) includes the other of the male-female snap coupling structure.

16. The fastening device according to claim 1 or 15, wherein the slider (3) has a second coupling portion (32) that is coupled to the second fastening part (2) from the second engagement surface (2n) side, the second coupling portion (32) includes one of a male-female snap coupling structure, and the second fastening part (2) includes the other of the male-female snap coupling structure.

17. The fastening apparatus according to any one of claims 1 to 16, wherein the first and second fastening parts (1, 2) are resin molded articles of the same structure molded from a single resin material.

18. The fastening apparatus according to any one of claims 1 to 17, wherein the first and second fastening parts (1, 2) have the same structure at least on the first engagement surface (1n) side, and are used such that the direction of protrusion of the engagement projection of each first engagement element (E1) of the first engagement element row (L1) is opposite to the direction of protrusion of the engagement projection of each second engagement element (E2) of the second engagement element row (L2).

19. A method for manufacturing a fastening device (9) comprising: a first row of engaging elements (L1); a long first fastening part (1) including a first engaging surface (1n) on which each first engaging element (E1) of the first row of engaging elements (L1) is erected, and a first fixed surface (1m) opposite to the first engaging surface (1n); a second row of engaging elements (L2); a long second fastening part (2) including a second engaging surface (2n) on which each second engaging element (E2) of the second row of engaging elements (L2) is erected, and a second fixed surface (2m) opposite to the second engaging surface (2n); and a slider (3) that is movable forward to engage the individual first engaging elements (E1) included in the first row of engaging elements (L1) and the individual second engaging elements (E2) included in the second row of engaging elements (L2) in an alternating manner, A method for manufacturing a fastening device, comprising the steps of connecting the first coupling portion (31) of the slider (3) to the first fastening part (1), and connecting the second coupling portion (32) of the slider (3) to the second fastening part (2), wherein the first coupling portion (31) is connected to the first fastening part (1) from the first engagement surface (1n) side, and in the process of this connection, the first fastening part (1) and / or the first coupling portion (31) are deformed, and / or the second coupling portion (32) is connected to the second fastening part (2) from the second engagement surface (2n) side, and in the process of this connection, the second fastening part (2) and / or the second coupling portion (32) are deformed.

20. The method for manufacturing a fastening apparatus according to claim 19, further comprising the step of manufacturing the first and second fastening parts (1, 2) using an extruder and one or more die wheels.

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