WO2023166685A1 - Rail fastener and method for manufacturing same - Google Patents

Abstract

In this rail fastener (100), first and second fitting parts (11, 12) are configured such that when the first and second fitting parts (11, 12) fit with each other, a first contact surface (71) of a first skin part (41) (or the first fitting part (11)) positioned further outside a sheet than an inner edge (31a) of a first reinforcing sheet (31), and a second contact surface (72) of a second skin part (42) (or the second fitting part (12)) positioned further outside the sheet than an inner edge (32a) of a second reinforcing sheet (32) press each other between the first and second reinforcing sheets (31, 32) and are in contact with each other.

Description

Rail fastener and its manufacturing method

The present disclosure relates to rail fasteners and manufacturing methods thereof.

Patent Documents 1 and 2 disclose rail fasteners in which a male fitting portion is press-fitted into a female fitting portion to form a vacuum seal. A female extrusion and a male extrusion are formed by extrusion. The female extrusion has a flat portion and a female mating portion rising therefrom. Similarly, the male extrusion has a flat portion and a male mating portion upstanding therefrom.

Regarding hook-and-loop fasteners, Patent Document 3 discloses manufacturing a hook-and-loop fastener containing a sheet material by supplying a coarse sheet material to a gap between a die wheel and a molten resin outlet of an injection die. Examples of sheet materials include woven fabrics, knitted fabrics, non-woven fabrics, wire meshes, and resin films (see paragraph 0024 of Patent Document 3). Patent Literature 4 also relates to hook-and-loop fasteners, and discloses providing a reinforcing layer made of hard resin in order to ensure engaging force in a wide temperature range.

U.S. Pat. No. 8,438,706 U.S. Pat. No. 8,646,156 Japanese Patent No. 3505030 JP-A-6-154016

For mounting rail fasteners when molding rail fasteners with a resin that has a certain degree of flexibility for thermocompression bonding of rail fasteners to objects to be mounted, or for smooth fitting of fitting portions of rail fasteners. It is not easy to obtain an appropriate hardness while suppressing the thickness of the mounting sheet, and the sealing performance (for example, watertightness and airtightness) of the rail fastener may not be stable. If the mounting sheet is formed as a thin layer of resin, the mounting sheet may be too soft and difficult to handle during mounting (for example, thermocompression bonding and/or sewing). Thus, it has been difficult to simultaneously achieve appropriate hardness of the mounting sheet for the rail fastener and improvement of the sealing performance of the rail fastener.

A rail fastener according to one aspect of the present disclosure includes a first stringer that includes a first mounting sheet and a first fitting portion, and a second stringer that includes a second mounting sheet and a second fitting portion. The two fitting portions are fitted to form a rail portion. The first mounting sheet includes a flexible first reinforcing sheet and a first mounting sheet extending from the first fitting portion to at least partially cover the first reinforcing sheet and made of the same resin as the resin of the first fitting portion. including a first skin consisting of: A second mounting sheet extends from the second fitting portion to at least partially cover the second reinforcing sheet, which is flexible, and is made of the same resin as the resin of the second fitting portion. a second skin consisting of Either of the following conditions (i) and (ii) are satisfied: (i) the first and second fitting portions are arranged so that the first reinforcing sheet is The first contact surface of the first skin portion located outside the inner edge of the seat and the second contact surface of the second skin portion located outside the inner edge of the second reinforcing sheet are the first and second contact surfaces of the second reinforcing sheet. and (ii) the first and second mating portions are configured to compressively contact each other between the second reinforcing sheets; A first contact surface of the first fitting portion located outside the inner edge of the reinforcing sheet, and a second contact surface of the second fitting portion located outside the inner edge of the second reinforcing sheet. are configured to press against each other between the first and second stiffening sheets.

When condition (i) is satisfied, the first fitting portion is a male fitting portion including at least a male projection, and the second fitting portion has a receiving space for receiving the male projection. and a female mating shaped to prevent disengagement of the male projection from the receiving space. Furthermore, the female fitting can be provided such that the receiving space is arranged on the second reinforcing sheet. Furthermore, the female fitting portion has a locking projection provided with a locking surface that prevents the male projection from being detached from the female fitting portion, and the locking surface is provided with the second reinforcing sheet. can be positioned above.

In some embodiments, the female fitting includes lower and upper jaws arranged oppositely to define a receiving space. The lower jaw includes a lower locking projection projecting upward to have a lower locking surface and the upper jaw includes an upper locking projection projecting downward to have an upper locking surface. The male projection is an arrow-shaped projection having a neck and a head, the head having a lower locking portion projecting downward to have a lower locking surface and an upper locking surface. It has an upper locked portion projecting upward. A lower locking surface and an upper locking surface may be positioned on the second reinforcing sheet.

In some embodiments, the lower locking surface is angled to approach the junction of the lower and upper jaws as it extends upwards and the upper locking surface approaches the junction as it extends downwards. , the lower locked surface is inclined for contact with the lower locking surface and the upper locked surface is inclined for contact with the upper locking surface.

In some embodiments, the first contact surface comprises a convex surface projecting outwardly of the inner edge of the first reinforcement sheet and/or the second contact surface comprises an inner surface of the second reinforcement sheet. It includes a convex surface projecting outwardly of the sheet beyond the edge.

In some embodiments, the male fitting further comprises a closure wall to which the male projection is coupled, wherein the male fitting and the female fitting are the male fitting and the female fitting. In addition to the at least one first contact point between the male projection and the female mating portion and the second contact point between the first contact surface and the second contact surface, a second On the opposite side of the contact point, the closure wall and the female mating portion are configured to have a third contact point where they press against each other. The female fitting includes a lower jaw and an upper jaw opposed to define a receiving space, wherein the upper jaw and the closure wall may press against each other at a third contact point.

In some embodiments, the male projection is an arrow-shaped projection having a neck and a head, the head including an upper latched portion and a lower latched portion. The lower jaw includes a lower locking projection to which the lower locked portion is locked, and the upper jaw includes an upper locking projection to which the upper locked portion is locked. The one or more first contact points are a contact point where the upper locked portion and the upper locking projection press against each other and contact, and a contact point where the lower locked portion and the lower locking projection press against each other. can include contact points that are touched by

In some embodiments, the length of the neck in the direction of insertion of the male projection into the receiving space of the female mating portion is such that the upper locking projection is sandwiched between the closing wall and the upper locked portion. at or less than the minimum value of this distance between the contact point of the upper locking projection and the lowest point of the upper locking surface at .

In some embodiments, any of the following conditions (a)-(c) are met:
(a) each of the first and second reinforcing sheets comprises at least one selected from the group consisting of paper, nonwoven fabric, woven fabric, and knitted fabric;
(b) both sides of the first reinforcing sheet are covered by the first skin portion and both sides of the second reinforcing sheet are covered by the second skin portion; and (c) the first skin on at least one side of the first reinforcing sheet. The layer thickness of the portion is equal to or less than the thickness of the first reinforcing sheet, and the layer thickness of the second skin portion on at least one surface of the second reinforcing sheet is equal to or less than the thickness of the second reinforcing sheet.

A method for manufacturing a rail fastener according to another aspect of the present disclosure includes a step of supplying a resin material to an extruder and extruding a first stringer from a first die of the extruder, wherein the first stringer and the first mounting sheet a step of supplying the resin material to the extruder and extruding the second stringer from the second nozzle of the extruder, wherein the second stringer is engaged with the second mounting sheet in the second fitting; including the step of including the part. A method for manufacturing a rail fastener includes a step of supplying a flexible first reinforcing sheet to a first mouthpiece and introducing the first reinforcing sheet to a first attachment sheet of a first stringer, wherein the first reinforcing sheet is: covering at least partially with a first skin portion of a first mounting sheet extending from the first fitting portion and made of the same resin as that of the first fitting portion; In the step of supplying the reinforcing sheet to the second mouthpiece and introducing the second reinforcing sheet to the second attachment sheet of the second stringer, the second reinforcing sheet extends from the second fitting portion and is attached to the second fitting portion. At least partially covered with a second skin portion of the second mounting sheet made of the same resin as the resin of the portion. The position of the first reinforcing sheet at the discharge port of the first base and the position of the first reinforcing sheet at the discharge port of the second base are arranged so that a predetermined state is established when the first and second fitting portions are fitted to form the rail portion. 2 The position of the reinforcing sheet is set. The predetermined state is such that the first contact surface of the first fitting portion and/or the first skin portion and the second contact surface of the second fitting portion and/or the second skin portion are positioned between the first and second reinforcing sheets. Including the state of contact by pressing against each other.

In some embodiments, the first base is configured to form the first contact surface on a convex surface projecting outwardly of the inner edge of the first reinforcing sheet and/or the second base is configured to form a second contact surface on a convex surface projecting outward from the inner edge of the second reinforcing sheet.

In some embodiments, the first fitting is a male fitting including at least a male projection and a closure wall to which the male projection is coupled, and the second fitting receives the male projection. A female mating portion having a receiving space and configured to prevent disengagement of the male projection from the receiving space. The position of the second reinforcing sheet at the discharge port of the second mouthpiece is set so that the receiving space of the female fitting portion is arranged on the second reinforcing sheet.

According to one aspect of the present disclosure, it is possible to simultaneously achieve an appropriate hardness of the mounting sheet for the rail fastener and an improvement in the sealing performance of the rail fastener.

1 is a schematic perspective view of a rail fastener according to one aspect of the present disclosure shown being thermo-compressed and sewn to fabric; FIG. It is a schematic cross-sectional schematic diagram of the 1st stringer of the rail fastener shown in FIG. FIG. 2 is a schematic cross-sectional view of a second stringer of the rail fastener shown in FIG. 1; FIG. 2 is a schematic cross-sectional view of a rail fastener in which a slider is attached to a rail portion of the rail fastener; FIG. 10 is a schematic diagram showing a variation in which the reinforcing sheet is exposed on the upper surface of the mounting sheet; FIG. 10 is a schematic diagram showing a variation in which the reinforcing sheet is exposed on the lower surface of the mounting sheet; FIG. 10 is a schematic diagram showing a variation in which the lower jaw of the female fitting part is formed thicker; 1 is a schematic diagram of an extruder used in a method of manufacturing a rail fastener according to one aspect of the present disclosure; FIG. Fig. 3 is a front view of the first die seen from the downstream side of the extruder; Fig. 3 is a front view of the second die seen from the downstream side of the extruder; FIG. 5 is a schematic diagram showing a schematic cross-sectional configuration of a rail fastener according to another aspect of the present disclosure; FIG. 12 is a schematic cross-sectional view of a first stringer of the rail fastener shown in FIG. 11; FIG. 12 is a schematic cross-sectional view of a second stringer of the rail fastener shown in FIG. 11; FIG. 12 is a partial enlarged schematic view of the rail fastener shown in FIG. 11, showing an enlarged fitting portion; It is a schematic diagram which shows the variation of a rail fastener. FIG. 16 is a schematic diagram of a first stringer of the rail fastener shown in FIG. 15; FIG. 16 is a schematic diagram of a second stringer of the rail fastener shown in FIG. 15;

Various embodiments and features will be described below with reference to the drawings. A person skilled in the art can combine each embodiment and/or each feature without undue explanation, and can also understand the synergistic effect of this combination. Redundant explanations among the embodiments will be omitted in principle. The referenced drawings are primarily for the purpose of describing the invention and are simplified for drawing convenience. Each feature is not only valid for the rail fastener and its manufacturing method disclosed in this application, but is a universal feature applicable to various other rail fasteners and its manufacturing method not disclosed in this specification. be understood as

In this specification, terms such as first and second may be used to distinguish members or parts with the same name. For example, stringers 1, 2, fittings 11, 12, and mounting sheets 21, 22 are respectively first and second stringers 1, 2, first and second fittings 11, 12, and first and They can be named as second mounting sheets 21,22. In the specification, identifier terms such as first and second may be omitted for simplification of description.

In this specification, terms such as front and back, left and right, and up and down may be used to describe relative positional relationships between members or portions. The longitudinal direction corresponds to the longitudinal direction of the rail fastener (the double-headed arrow between F and Re in FIG. 1), the left-right direction corresponds to the width direction of the rail fastener (the double-headed arrow between L and Ri in FIG. 1), The vertical direction corresponds to the thickness direction of the rail fastener (the double-headed arrow between U and D in FIG. 1). Of course, the vertical direction does not need to coincide with the vertical direction (the direction of gravity). That is, directional terms referred to in this specification should be understood in terms of rail fasteners and not in terms of the vertical direction (the direction of gravity), and are independent of the vertical direction (the direction of gravity).

The rail fastener 100 is a resin molded article (for example, a resin extrusion molded article), and is a long article that extends in a predetermined direction with a predetermined width. A rail fastener 100 has a pair of left and right separable first and second stringers 1 and 2 . Each of the first and second stringers 1 and 2 is elongated in the same direction as the rail fastener 100 and extends in the same direction with a predetermined width. When the rail fastener 100 is manufactured by extrusion molding, the longitudinal direction of the rail fastener 100 and each stringer 1, 2 is equal to the extrusion direction.

The opening between the first and second stringers 1,2 is closed by coupling the first and second stringers 1,2, and the opening between the first and second stringers 1,2 is closed by releasing the coupling of the first and second stringers 1,2. An opening can be formed in the The first and second stringers 1,2 are attached to the fabrics 3,4 respectively by thermocompression or sewing or a combination thereof. Objects to which the rail fastener 100 is attached may be, for example, clothes, bags, bags, and the like. Although not shown in FIG. 1, the stringers 1 and 2 can be connected by a connecting member (not shown) at one or both ends of the rail fastener 100 in the longitudinal direction. Of course, the stringers 1 and 2 can be completely separated without connecting the stringers 1 and 2 with a connecting member.

The first stringer 1 has a first fitting portion 11 and a first attachment sheet 21 . The second stringer 2 has a second fitting portion 12 and a second attachment sheet 22 . Each of the first and second fitting portions 11 and 12 is formed continuously in the longitudinal direction of the rail fastener 100 while maintaining a predetermined cross-sectional shape. The first and second mounting sheets 21, 22 are flexible sheets (composite sheets as described below) of predetermined thickness defined by upper surfaces 21m, 22m and lower surfaces 21n, 22n, respectively, and can be It is formed continuously in the longitudinal direction of the rail fastener 100 . The first fitting portion 11 is provided at the inner edge 21a of the first attachment sheet 21 or at a position near the inner edge 21a. The second fitting portion 12 is provided at the inner edge 22a of the second attachment sheet 22 or at a position near the inner edge 22a. It should be noted that the first and second mounting sheets 21, 22 have inner edges 21a, 22a that are arranged adjacent to each other when they are joined, and an outer edge 21b on the opposite side of the inner edges 21a, 22a. , 22b can be sewn to the fabrics 3, 4 by the thread 8. As shown in FIG. A waterproof tape may be attached to the mounting sheet so as to cover the seams of the sewing thread 8 to enhance its waterproofness. Also, the method of joining the attachment sheet and the fabric is not limited to the method using the sewing thread 8, and the two may be joined by welding.

The rail portion 10 is formed by fitting the first and second fitting portions 11 and 12 together. As with the first and second fitting portions 11 and 12, the rail portion 10 is formed continuously in the longitudinal direction of the rail fastener 100. As shown in FIG. The gap between the first and second fitting portions 11 and 12 is closed by the contact between the first and second fitting portions 11 and 12 in the rail portion 10, and the rail fastener 100 achieves the desired sealing performance according to this degree. demonstrate. That is, movement of the fluid (liquid or gas) through the gap of the rail portion 10 is suppressed or prevented.

The first fitting portion 11 is the male fitting portion 5 (see FIG. 2), and the second fitting portion 12 is the female fitting portion 6 (see FIG. 3). The first and second stringers 1 and 2 are coupled by continuing the engagement of the male fitting portion 5 and the female fitting portion 6 in the width direction of the rail fastener 100 along the longitudinal direction of the rail fastener 100, The engagement between the male fitting portion 5 and the female fitting portion 6 in the width direction of the rail fastener 100 is continuously released along the longitudinal direction of the rail fastener 100, thereby separating the first and second stringers 1, 2 from each other. is decoupled. The mating direction of the male fitting portion 5 and the female fitting portion 6 is not the vertical direction but the horizontal direction. The width direction of the rail fastener 100 is perpendicular to the longitudinal direction of the rail fastener 100 and perpendicular to the thickness direction of the mounting sheets 21 and 22 . The specific configurations of the male fitting portion 5 and the female fitting portion 6 can be arbitrarily designed by those skilled in the art, in addition to those shown in FIGS. The fitting portions 11 and 12 may be configured by combining the male fitting portion and the male fitting portion without being limited to the combination of the male fitting portion and the female fitting portion.

The male fitting 5 is a male fitting that includes a male projection 52 and a closing wall 51 to which the male projection 52 is coupled (eg, at its proximal end). The closing wall 51 rises (preferably vertically) from the upper surface 21m of the mounting sheet 21 . A male projection 52 extends from the closure wall 51 outwardly relative to the mounting seat 21 . The male fitting portion 5 may further have a guide projection 53 projecting from the closing wall 51 on the side opposite to the male projection 52 (that is, toward the inside of the seat). In addition, the sheet outer direction is a direction from a point on the sheet surface (upper surface or lower surface) of a certain sheet (for example, a mounting sheet or a reinforcing sheet described later) to a point outside the sheet surface with respect to a plane orthogonal to the vertical direction. Yes, and the inside of the seat is in the opposite direction. The closing wall 51, the male projection 52, and the guide projection 53 are all formed continuously in the longitudinal direction of the rail fastener 100, and the surfaces provided by these are also the same. The guide projection 53 is provided in relation to the slider 9 and can be omitted.

The closing wall 51 has a wall surface 51f that faces the female fitting portion 6 while facing the outside of the mounting sheet 21, and has an upper wall surface above the male projection 52 and a lower wall surface below it. classified. These upper and lower wall surfaces are flat vertical surfaces perpendicular to the width direction (horizontal direction) of the rail fastener 100, but either or both of them may be inclined surfaces. Either or both of the upper and lower wall surfaces of the wall surface 51f may be provided with recesses or protrusions. A lower wall surface of the wall surface 51f extends downward from the lower surface of the male projection 52. As shown in FIG. The upper wall surface of wall surface 51f extends upwardly from the upper surface of male projection 52 to reach the top surface of closure wall 51 .

The male projection 52 can be an arrow-shaped projection that projects outward from the mounting sheet 21 and has a neck portion 52a and a head portion 52b. The neck 52a is connected to the closing wall 51 and the head 52b is connected to the neck 52a. The neck portion 52a has a thickness defined by an upper surface 52a1 and a lower surface 52a2, and the head portion 52b has a thickness defined by an upper surface 52b1 and a lower surface 52b2. Head 52b is thicker than neck 52a. The head 52b includes an upper locked portion 52c and a lower locked portion 52d. The upper locked portion 52c projects upward from an upper surface 52a1 of the neck portion 52a, and the lower locked portion 52d projects downward from a lower surface 52a2 of the neck portion 52a. , 52f are provided. The upper and lower engaged surfaces 52e and 52f are provided so as to face the upper and lower wall surfaces of the wall surface 51f of the closing wall 51, respectively, and the upper and lower surfaces of the female fitting portion 6, which will be described later, are provided therebetween. Upper and lower receiving grooves 52p, 52q are formed for receiving the lower locking projections 64, 63 respectively. The upper and lower engaged surfaces 52e and 52f are flat vertical surfaces perpendicular to each other in the width direction (horizontal direction) of the rail fastener 100, but may be inclined surfaces. The upper receiving groove 52p is defined by the upper wall surface of the wall surface 51f, the upper surface 52a1 of the neck portion 52a, and the upper engaged surface 52e. The lower receiving groove 52q is defined by the lower wall surface of the wall surface 51f, the lower surface 52a2 of the neck portion 52a, and the lower engaged surface 52f.

The head 52b is tapered toward the tip, and more specifically, has an upper inclined surface 52r that slopes downward toward the tip (the tip surface 52t in the illustrated example), and an upper inclined surface 52r that slopes downward toward the tip (the has a lower inclined surface 52s inclined upward toward the tip surface 52t). Such a shape of the head portion 52b makes it easier to press-fit the male fitting portion 5 into the female fitting portion 6 (between the lower jaw 61 and the upper jaw 62, which will be described later). Both the neck portion 52 a and the head portion 52 b are formed continuously along the longitudinal direction of the rail fastener 100 .

The guide projection 53 is provided on the opposite side of the male projection 52 with respect to the closing wall 51 . The guide protrusion 53 is spaced apart from the upper surface 21m of the mounting sheet 21, and a gap 54 is formed between the guide protrusion 53 and the mounting sheet 21. As shown in FIG. The guide projection 53 is not limited to a rectangular cross section, and can have other shapes such as a triangular or semicircular cross section.

The female fitting part 6 has a receiving space 65 for receiving the male projection 52 and is shaped to prevent the male projection 52 from leaving the receiving space 65 . In some cases, the female fitting 6 has a lower jaw 61 and an upper jaw 62 defining a receiving space 65 therebetween. The female fitting portion 6 has a substantially C-shaped cross-sectional shape in which the lower jaw 61 and the upper jaw 62 are joined at the joint portion 68, but is not limited to this cross-sectional shape. The receiving space 65 , the lower jaw 61 and the upper jaw 62 are all formed continuously in the longitudinal direction of the rail fastener 100 . The lower jaw 61 has a lower locking projection 63 projecting upward (e.g., from the tip of the lower jaw 61) to have a lower locking surface 63s, and the upper jaw 62 has an upper locking surface 64s ( For example, it has an upper locking projection 64 projecting downward (from the distal end of the upper jaw 62). An insertion opening 69 for the male projection 52 is defined by the lower locking projection 63 and the upper locking projection 64 . The lower locking surface 63s and the upper locking surface 64s are provided orthogonally or inclined to the insertion direction A1 of the male projection 52 into the receiving space 65, and are used to prevent the male projection 52 from being disengaged from the female fitting portion 6. prevent Note that the insertion direction A1 is equal to the width direction of the rail fastener 100 . The lower locking projection 63 locks the lower locked portion 52d, and the upper locking projection 64 locks the upper locked portion 52c.

The lower locking projection 63 has an inclined surface 63j that slopes down as it separates outward from the upper end of the lower locking surface 63s (of the mounting sheet 22). The inclined surface 63j is divided into a gently inclined area and a steeply inclined area adjacent to the outside of the seat. Similar to the lower locking projection 63, the upper locking projection 64 has an inclined surface 64j that slopes upward as the distance from the lower end of the upper locking surface 64s toward the outside of the seat (of the mounting sheet 22) increases. The inclined surface 64j is divided into a gently inclined area and a steeply inclined area adjacent to the outside of the seat. Thanks to the tapered inclined surfaces 63j, 64j of the lower and upper locking projections 63, 64, the vertical width of the insertion opening 69 is gradually reduced along the insertion direction A1, and the width between the lower jaw 61 and the upper jaw 62 is reduced. Induction and easy press-fitting of the head 52b are facilitated. For this purpose, the tapered line shape ( inclined surfaces 52s, 52r) of the head 52b also serves.

The female fitting part 6 has a guide projection 66 protruding from the coupling part 68 inwardly of the mounting sheet 22 . The guide protrusion 66 is spaced apart from the upper surface 22m of the mounting sheet 22, and a gap 67 is formed between the guide protrusion 66 and the mounting sheet 22. As shown in FIG. The guide projection 66 is not limited to a rectangular cross section, and can have other shapes such as a triangular or semicircular cross section.

When the male fitting portion 5 and the female fitting portion 6 are fitted together, the head portions 52b of the male projections 52 of the male fitting portion 5 engage the lower and upper locking projections of the female fitting portion 6. It is press-fitted between 63 and 64 to expand the vertical gap between them and pass therebetween. After that, the lower jaw 61 and the upper jaw 62 move to return to their original shapes, and the neck 52a and/or the head 52b are sandwiched between them. At the same time, the upper locking projection 63 is received in the upper receiving groove 52p and is sandwiched and compressed between the wall surface of the closing wall 51 and the upper locked surface 52e. Similarly, the lower engaging projection 64 is received in the lower receiving groove 52q and is sandwiched and pressed between the first contact surface 71 of the first skin portion 41 and the lower engaged surface 52f. At this time, the upper locked portion 52c and the upper locking projection 64 press against each other at the contact point P1a (see FIG. 1) (in the left-right direction), and contact the lower locked portion 52d. The lower locking projections 63 press and contact each other at the contact point P1b (see FIG. 1) (in short, in the lateral direction). In this way, the sealing performance at each of the contact points P1a and P1b is enhanced, and at the same time, the formation of a second contact point P2 (optionally a third contact point P3), which will be described later, can be promoted. Since the male fitting portion 5 and the female fitting portion 6 are made of resin (for example, soft resin), when a large force is applied, the male fitting portion 5 and the female fitting portion 6 do not fit together. combination is canceled.

In the mating state of the male fitting portion 5 and the female fitting portion 6, the distal end portion of the male projection 52 (for example, the distal end surface 52t, the upper inclined surface 52r, and the lower inclined surface 52s) and the female fitting portion A gap 81 may be formed between the portion 6 and the coupling portion 68 (the bottom surface of the receiving space 65 intersecting the insertion direction A1). In this case, the ease of deformation of the female fitting portion 6 (in particular, the lower jaw 61 and the upper jaw 62) can be ensured, and smooth fitting and unfitting can be promoted. Although the sealing performance of the rail fastener 100 may deteriorate with the formation of the gap 81, this problem is avoided or suppressed by pressure contact at the second contact point P2 or the like, which will be described later. The lateral width of the gap 81 is maximum at the vertical center, and can gradually decrease as it moves upward or downward from there. The gap 81 is formed continuously in the longitudinal direction of the rail fastener 100 .

The fitting and unfitting of the male fitting part 5 and the female fitting part 6 can be performed using the slider 9 (see FIG. 4), or can be performed by man's finger operation. As the slider 9 moves forward, the male fitting portion 5 and the female fitting portion 6 are fitted together, and as the slider 9 moves backward, the fitting between the male fitting portion 5 and the female fitting portion 6 is released. A slider 9 is constructed. A column (not shown) extending vertically is provided at the front end of the slider 9 at the center position in the width direction. be provided.

The slider 9 has a connecting plate 91 and flange walls 92, 93 extending downward from the left and right side edges of the connecting plate 91. The flange walls 92, 93 are provided with recesses 92a, 93a for receiving the guide projections 53, 66. be done. The distance between the flange walls 92, 93 is tapered such that it is wider at the front end of the slider 9 and narrower at the rear end of the slider 9. , 12 are preferably provided with passages for mating and unmating. The flange walls 92 and 93 are provided with insertion portions 92b and 93b that are inserted into the gaps 54 and 67 described above.

When opening and closing the rail fastener 100 with a human finger, for example, the male fitting portion 5 and the female fitting portion 6 can be fitted together by pinching them between the thumb and index finger. One stringer can be forcibly pulled away from the other stringer to release the engagement between the male fitting 5 and the female fitting 6 . By separating one stringer from the other, it is possible to cause continuous disengagement of the male fitting portion 5 and the female fitting portion 6 along the longitudinal direction of the rail fastener 100 .

The first mounting sheet 21 is a composite sheet as described above, and includes the flexible first reinforcing sheet 31 and the first skin portion 41 . The second mounting sheet 22 is a composite sheet as described above and includes a flexible second reinforcing sheet 32 and a second skin portion 42 . The first skin portion 41 extends from the first fitting portion 11 to at least partially cover the first reinforcing sheet 31 and is made of the same resin as that of the first fitting portion 11 . The second skin portion 42 extends from the second fitting portion 12 to at least partially cover the second reinforcing sheet 32 and is made of the same resin as that of the second fitting portion 12 . The first fitting portion 11 and the first skin portion 41 are formed together from the same resin and are different portions of the same resin portion. Similarly, the second fitting portion 12 and the second skin portion 42 are also made of the same resin and are different parts of the same resin portion. The fact that the fitting part and the skin part are different parts of the same resin part is a result of the fact that the stringers 1 and 2 are manufactured by extrusion molding, as will be described later, but molding methods other than this are also adopted. It is possible.

In the present embodiment, the first and second fitting portions 11 and 12 are positioned on the outer side of the first reinforcing sheet 31 with respect to the inner edge 31a of the first reinforcing sheet 31 when they are fitted together. The contact surface 71 and the second contact surface 72 of the second skin portion 42 positioned further outward than the inner edge 32a of the second reinforcing sheet 32 are arranged between the first reinforcing sheet 31 and the second reinforcing sheet 32. configured to press against each other. In such a case, the first and second reinforcing sheets 31 and 32 are individually introduced into the first and second mounting sheets 21 and 22 to obtain appropriate hardness thereof, and at the same time the first and second reinforcing sheets 31 , 32, the sealing performance of the rail fastener 100 is enhanced.

As shown in FIG. 2, the boundary between the first mounting sheet 21 and the first fitting portion 11 is set at the position of a plane L1 perpendicular to the vertical direction. In this case, it can be said that the first contact surface 71 is provided on the surface of the first skin portion 41 . Similarly, as shown in FIG. 3, the boundary between the second mounting sheet 22 and the second fitting portion 12 is set at the position of a plane L2 perpendicular to the vertical direction. In this case, it can be said that the second contact surface 72 is provided on the surface of the second skin portion 42 . Both planes L1 and L2 are set to be flush with the upper surfaces 21m and 22m of the mounting sheets 21 and 22, respectively.

When the first and second fitting portions 11 and 12 are fitted together, the first and second mounting sheets 21 and 22 are arranged on the same plane. It can be arranged in a plane. It should be noted that the fact that the sheets are arranged in the same plane does not require that the thickness of each sheet be equal.

The contact between the first contact surface 71 and the second contact surface 72 can be local contact. For this purpose or a different purpose, the first contact surface 71 can be a convex surface projecting outward from the inner edge of the first reinforcing sheet 31 and/or the second contact surface 72 can be a 2 It may be a convex surface that protrudes outward from the inner edge of the reinforcing sheet 32 . As in the illustrated example, one of the first and second contact surfaces 71 and 72 may be a convex surface and the other may be a flat surface. As shown in FIG. 2, the second skin portion 42 may be provided with a convex surface 611, and the first skin portion 41 in contact with the convex surface 611 may be a flat surface. In this case, the alignment problems required when both the first and second contact surfaces 71, 72 are convex do not occur.

In some cases, the male mating portion 5 and the female mating portion 6 will have the male projection 52 and the female mating portion described above when the male mating portion 5 and the female mating portion 6 are mated. In addition to the one or more first contact points P1 (e.g., two points P1a, P1b) between the 6 and the second contact point P2 between the first contact surface 71 and the second contact surface 72, a second On the opposite side (e.g., upper side) of the two contact points P2, the closing wall 51 and the female fitting 6 (e.g., the upper jaw 62) are configured to have a third contact point P3 that presses against each other and contacts. (See Figure 1). This effectively enhances the sealing performance of the rail fastener 100 . It promotes the realization of sealing performance equal to or exceeding that of waterproof slide fasteners at a low cost. A mode in which one of the contact points P1a and P1b described above is omitted is also conceivable.

The neck portion 52a in the width direction of the rail fastener 100 is used to promote pressure contact at the above three or more contact points (in some cases, four points in total, P1a, P1b, P2, and P3, as illustrated in FIG. 1). is set to be less than the interval D2 (see FIG. 3) in the same direction. The interval D2 is the lowest point N1 of the locking surface 64s of the upper jaw 62 in the width direction of the rail fastener 100 and the contact point of the upper jaw 62 with the closing wall 51 when the male projection 52 and the female fitting portion 6 are fitted. N2 intervals are shown. This promotes the pressure contact state between the surfaces at the contact points P1a and P3. When the male projection 52 and the female fitting portion 6 are fitted together, when the closing wall 51 and the upper jaw 62 are in contact with each other in the vertical range, the contact point N2 is closest to the coupling portion 68 along the insertion direction A1. It means the position point (ie the lowest point of the upper and lower range). Briefly, when interval D2 has a range, the minimum value of interval D2 is referenced for comparison with D1. It should be noted that the contact point N2 may be located slightly below the tip point of the upper jaw 62 . The length D1 of the neck portion 52a is the distance (or the maximum value) between the wall surface 51f of the closing wall 51 and the upper locked surface 52e of the head 52b, or the lower covering of the wall surface 51f of the closing wall 51 and the head 52b. It is assumed to be equal to the spacing of the locking surfaces 52f (or its maximum value).

By increasing the length D1, it becomes easier to fit the first and second fitting portions 11 and 12, but the degree of pressure contact decreases. The reduction in length D1 increases the degree of compressive contact, although more force is required to fit the first and second fittings 11, 12 together. The relationship between the length D1 and the interval D2 described above also applies to the relationship between the length D1 and the interval D2' shown in FIGS. In this regard, the contact point N2 of the upper jaw 62 with the closing wall 51 is read as the contact point of the lower jaw 61 with the inner surface (or the first contact surface 71) of the first skin portion 41. FIG. Further, when the male projection 52 and the female fitting portion 6 are fitted, if the lower jaw 61 contacts the inner surface (or the first contact surface 71) of the first skin portion 41 in a certain upper and lower range, the contact of the lower jaw 61 The point means the point closest to the coupling portion 68 along the insertion direction A1 (that is, the highest point in the vertical range). When the length D1 is less than the interval D2', the pressure contact state between the surfaces at the contact points P1b and P2 is promoted. Tip points 61e and 62e of the lower jaw 61 and the upper jaw 62 are located at the outermost position of the tape with respect to the mounting sheet 22. As shown in FIG.

Similar to the contact between the first contact surface 71 and the second contact surface 72, the contact between the closing wall 51 and the female fitting 6 (eg, upper jaw 62) can be local contact. For this purpose or a different purpose, the closing wall 51 may have a convex surface projecting outwards from the inner edge 31 a of the reinforcing sheet 31 . Similarly, the female fitting 6 (eg, upper jaw 62) may have a convex surface (see numeral 621 in FIG. 3) projecting outward from the inner edge 32a of the reinforcing sheet 32. As shown in FIG. As shown in FIG. 3, the upper jaw 62 may be provided with a convex surface 621 and the wall surface of the closure wall 51 with which it contacts may be a flat surface. In this case, there is no alignment problem, as described above.

The reinforcing sheets 31, 32 are made of a material different from the resin of the fitting portions 11, 12 and the skin portions 41, 42, namely paper, nonwoven fabric, woven fabric, or knitted fabric, or a combination thereof. The resin of the fitting portions 11, 12 and the skin portions 41, 42 is made of a thermoplastic polymer, more preferably a thermoplastic elastomer, such as thermoplastic polyurethane, polyester elastomer, olefin elastomer, polyvinyl chloride, and the like. . By introducing the reinforcing sheets 31, 32 into the mounting sheets 21, 22, the rigidity of the mounting sheets 21, 22 is increased and their shape stability is enhanced. At the same time, the amount of resin used is reduced. In addition, since the reinforcing sheets 31 and 32 have flexibility, the flexibility of the mounting sheets 21 and 22 is also ensured. When the reinforcing sheets 31 and 32 are woven fabrics, knitted fabrics, or mixtures thereof, minute undulations (according to the weaving or knitting) are formed on both sides of the reinforcing sheets 31 and 32, so that the outer skins 41 and 42 adhere to the resin. sexuality is enhanced.

The first reinforcing sheet 31 can be provided so as to support the male fitting part 5 . This enhances the stability of the shape of the male fitting portion 5 . A second reinforcing sheet 32 may be provided to support the female fitting 6 . This enhances the stability of the shape of the female fitting portion 6 . When adopting a soft resin (for example, thermoplastic polyurethane, polyester elastomer, olefin elastomer, polyvinyl chloride, etc.) for manufacturing the rail fastener 100, the shape of the male fitting portion 5 and the female mold are changed during the curing process. Although the shape of the fitting portion 6 is likely to change, the shape change is suppressed thanks to the reinforcement sheets 31 and 32 .

The male fitting part 5 can be provided so that at least part of it is arranged on the first reinforcing sheet 31 . Guide protrusions 53 may be arranged on the first reinforcing sheet 31 . Additionally or alternatively, at least a portion (preferably the entire surface) of the wall surface 51z of the closing wall 51 on which the guide projections 53 are provided may be arranged on the first reinforcing sheet 31 . This promotes more stable support of the closing wall 51 by the first reinforcing sheet 31 . The inner edge 31a of the first reinforcing sheet 31 is located outside the guide projection 53 or the wall surface 51z of the closing wall 51 with respect to the first mounting sheet 21, and in some cases directly below the top surface 51g of the closing wall 51. can be located. In the illustrated example, the wall surface 51z of the closing wall 51 includes an inclined surface located above the guide projection 53 and a vertical surface located below the guide projection 53, both of which are located above the first reinforcing sheet 31. are doing.

The female fitting part 6 can be provided such that a receiving space 65 for receiving the male fitting part 5 is arranged on the second reinforcing sheet 32 . Preferably, part of the second reinforcing sheet 32 is embedded directly below the lower jaw 61 . As is clear from FIG. 3, the lower and upper locking projections 63, 64 (as well as the lower and upper locking surfaces 63s, 64s) are also positioned on the second reinforcing sheet 32 (on its upper surface). It is thought that the flexibility of the lower locking projection 63 is reduced by the reinforcing sheet 32 and the locking force is increased. The inner edge 32 a of the second reinforcing sheet 32 can be positioned closer to the second contact surface 72 than the lower locking surface 63 s of the lower locking projection 63 . Additionally or alternatively, the inner edge 32a of the second reinforcing sheet 32 may be positioned directly below the aforementioned inclined surface 63j (immediately below the boundary between the gentle and steep areas of the inclined surface 63j).

In order to improve the waterproofness of the rail fastener 100, both sides of the reinforcing sheets 31, 32 are preferably covered with the skin portions 41, 42. Of course, the upper surface of the reinforcing sheet 32 can be exposed (see FIG. 5) or the lower surface of the reinforcing sheet 32 can be exposed (see FIG. 6). Moreover, although the thickness of the rail fastener 100 and the amount of resin used increase, as shown in FIG.

Since the reinforcing sheets 31, 32 have appropriate strength, the mounting sheets 21, 22 can be sewn to the object to be mounted with the sewing thread 8. Even if the needle penetrates through the reinforcing sheets 31 and 32, the reinforcing sheets 31 and 32 are prevented from being torn from there. Sewing is a method that cannot be adopted when the mounting sheets 21 and 22 are made of a single layer of resin.

In order to ensure uniform flexibility of the mounting sheets 21, 22 or for sewing using the threads 8 described above, the outer edges of the reinforcing sheets 31, 32 are aligned with the outer edges 21b, 21b, 21b of the mounting sheets 21, 22. 22b. That is, the reinforcing sheets 31 and 32 are introduced into the mounting sheets 21 and 22 so as to have such a positional relationship.

By introducing the reinforcing sheets 31 and 32 into the mounting sheets 21 and 22, the thickness of the skin portions 41 and 42 (the upper layer of the skin portions covering the upper surfaces of the mounting sheets 21 and 22 or the skin portions covering the lower surfaces of the mounting sheets 21 and 22 is reduced). layer) can be sufficiently thin. In some cases, the layer thicknesses TH41 and TH42 (see FIGS. 2 and 3) of the skin portions 41 and 42 are each smaller than the thickness of the reinforcing sheets 31 and 32, preferably 0.3 mm or less, or 0.3 mm or less. .2 mm or less. That is, the strength or flexibility of the mounting sheets 21 and 22 is mainly ensured by the reinforcing sheets 31 and 32, and the waterproofness of the mounting sheets 21 and 22 is mainly ensured by the skin portions 41 and 42. As shown in FIG. In addition, the thickness of the skin portions 41 and 42 may be changed between the upper layer and the lower layer of the reinforcing sheets 31 and 32 . The reinforcing sheets 31 and 32 may be covered with the skin portions 41 and 42 except for the front and rear end surfaces thereof.

A plurality of through-holes may be formed in the reinforcing sheets 31 and 32 in order to enhance the adhesion between the reinforcing sheets 31 and 32 and the skin portions 41 and 42 . The upper layers of the skin portions 41 and 42 on the upper surfaces of the reinforcing sheets 31 and 32 and the lower layers of the skin portions 41 and 42 on the lower surfaces of the reinforcing sheets 31 and 32 are connected by the resin filling the through holes of the reinforcing sheets 31 and 32. .

Each stringer 1, 2 can be manufactured by extrusion molding. As shown in FIG. 8, the extruder 200 includes a rotating machine 210, a screw 220 rotated by the rotating machine 210, a cylindrical body 230 containing the screw 220, a mouthpiece 240, a resin material inlet 250, and a reinforcing sheet 31. has a reel 260 on which is wound. When a solid resin is introduced into the cylindrical body 230, a heater is provided in the cylindrical body 230 to melt the solid resin. Various configurations of extruder 200 may be employed, and the one shown in FIG. 8 is merely one example.

An appropriate mouthpiece 240 is adopted according to the cross-sectional shape of the stringers 1 and 2. 9 shows a base 240a for stringer 1. FIG. 10 shows a base 240b for stringer 2. FIG. The position of the reinforcing sheet 31 at the ejection port 240m of the mouthpiece 240a and the position of the reinforcing sheet 32 at the ejection port 240n of the mouthpiece 240b are, as described above, when the first and second fitting portions 11 and 12 are fitted. The second contact surfaces 71 and 72 are set to be in pressure contact with each other. In other words, when the first and second fitting portions 11 and 12 are fitted, the running paths of the reinforcing sheets 31 and 32 in the mouthpieces 240a and 240b are, as described above, the first and second contact surfaces 71 and 72. are set to be in pressure contact. Such a configuration achieves the same effect as described above.

Regarding the production of the stringers 1 and 2, (a) a step of supplying the resin material to the extruder 200 and extruding the stringer 1 from the nozzle 240a of the extruder 200, (b) supplying the resin material to the extruder 200. (c) supplying a flexible reinforcing sheet 31 to the die 240a to introduce the reinforcing sheet 31 into the mounting sheet 21 of the stringer 1; ) a step of supplying a flexible reinforcing sheet 32 to the mouthpiece 240b and introducing the reinforcing sheet 32 to the mounting sheet 21 of the stringer 2;

Regarding steps (a) and (c), the operation of extruder 200 (eg, rotation of screw 220) and the supply of reinforcing sheets 31 and 32 (eg, feeding of reinforcing sheet 31 from reel 260) proceed simultaneously. . The rotation of the screw 220 causes the resin to flow inside the cylindrical body 230, reach the mouthpiece 240a, and be extruded from its outlet 240m. The reinforcing sheet 31 delivered from the reel 260 travels along a predetermined running path of the mouthpiece 240a and is released from the ejection opening 240m of the mouthpiece 240a in a state of being embedded in the resin (attachment sheet 21). The same applies to steps (b) and (d). The rotation of the screw 220 causes the resin to flow inside the cylindrical body 230, reach the mouthpiece 240b, and be extruded from the discharge port 240n. The reinforcing sheet 32 delivered from the reel 260 travels along a predetermined running path of the mouthpiece 240b, and is released from the ejection port 240n of the mouthpiece 240b in a state of being embedded in the resin (attachment sheet 22). The uncured stringers 1 and 2 ejected from the mouthpieces 240a and 240b are supplied to a cooler and forcedly cooled by water cooling or air cooling. A support for supporting the stringers 1, 2 and a winding device are provided downstream of the extruder and the cooler.

The bases 240a, 240b can be designed so that the running path of the reinforcing sheets 31, 32 alone (before being embedded in the resin) in the bases 240a, 240b ends just before the outlets 240m, 240n of the bases 240a, 240b. can. The distance between the end point of the running path of the reinforcing sheets 31, 32 alone and the outlets 240m, 240n of the mouthpieces 240a, 240b is appropriately secured, and the reinforcing sheets 31, 32 are securely attached by resin (mounting sheets 21, 22). can be buried.

The bases 240a, 240b are configured to embody one or more of the features described with respect to the rail fastener 100. For example, the base 240 a is configured to form the first contact surface 71 on a convex surface projecting outward from the inner edge of the reinforcing sheet 31 . The base 240b can also be configured in the same manner. Further, the position of the reinforcing sheet 32 at the outlet 240n of the base 240b can be set so that the receiving space 65 of the female fitting portion 6 is arranged on the reinforcing sheet 32. As shown in FIG. Furthermore, the base 240 b can be configured such that a portion of the reinforcing sheet 32 is embedded directly below the lower jaw 61 . Thus, the bases 240a, 240b can be configured to achieve various features with respect to the rail fastener 100. As shown in FIG.

As can be understood from FIGS. 11 to 14, the lower and upper locking projections 63, 64 of the female fitting portion 6 are respectively of a reversed structure, and similarly, the lower and upper locked projections 52 of the male projection 52 are locked. Each of the portions 52d and 52c can have a return structure (which can be fitted into the return structure of the locking projection). In this case, the holding force of the male projection 52 by the female fitting portion 6 can be effectively increased. Furthermore, the contact area between the female fitting portion 6 and the male projection 52 is increased, and the sealing performance of the rail fastener 100 is also enhanced. However, when opening and closing the rail fastener 100, the female fitting portion 6 may need to deform more. If the female fitting part 6 is supported by the second reinforcing sheet 32 as described above, the female fitting part 6 is provided with sufficient mechanical strength to withstand it.

Specifically, the lower locking surface 63s is slanted to approach the connecting portion 68 of the lower jaw 61 and upper jaw 62 as it extends upward, and the upper locking surface 64s is connected as it extends downwardly. It is slanted to approach portion 68 . The lower locked surface 52f is slanted to accommodate contact with the lower locking surface 63s, and essentially approaches the first mounting seat 21 or the closing wall 51 as it extends downward. The upper locked surface 52e is slanted to accommodate contact with the upper locking surface 64s, and essentially approaches the first mounting seat 21 or the closing wall 51 as it extends upwardly.

The lower engaging surface 63s, the upper engaging surface 64s, the lower engaged surface 52f, and the upper engaged surface 52e are each used for inserting the male projection 52 into the receiving space 65 of the female fitting portion 6. It can be formed to intersect the planes PL1 and PL2 parallel to the direction A1 at the same angle θ1. In this case, securing a sufficient contact area is facilitated. The angle formed by the upper surface 52b1 of the head 52b and the upper locked surface 52e may also be the angle θ1 described above. The same applies to the angle formed by the lower surface 52b2 of the head 52b and the lower locked surface 52f. Upper locking projection 64 may include a flat surface 64k contained in plane PL1, adjacent to which is formed an inclined surface 64j. Similarly, the lower locking projection 63 may include a flat surface 63k subsumed by the plane PL2, adjacent to which is formed an inclined surface 63j.

As described above, the length D1 of the neck portion 52a in the insertion direction A1 of the male projection 52 into the receiving space 65 of the female fitting portion 6 is determined by the lowest point N1 of the upper locking surface 64s and the upper engagement with the closing wall 51. It may be less than the minimum value of the distance D2 between the contact points N2 of the stop projections 64. This promotes the pressure contact state between the surfaces at the contact points P1a and P3. The relationship between D1' and D2' also applies.

As shown in FIG. 14, the closing wall 51 can be made shorter than the female fitting portion 6. Specifically, the top surface 51g of the closing wall 51 is lower than the upper surface of the upper jaw 62, and a step is formed between the female fitting portion 6 and the male projection 52 in a fitted state. Thereby, the width of the rail portion 10 of the rail fastener 100 can be made to appear narrower. Preferably, the closing wall 51 is set at a height between the upper surface of the upper jaw 62 and the lower end of the upper locking projection 64 in order to secure the contact point P3.

15 to 17, unlike the embodiment described above, the first and second fitting portions 11 and 12 are arranged such that the first reinforcing sheet 31 is The first contact surface 71 of the first fitting portion 11 located outside the inner edge of the sheet and the second contact surface 71 of the second fitting portion 12 located outside the inner edge of the second reinforcing sheet 32 . Surfaces 72 are configured for mutually compressive contact between the first and second reinforcing sheets 31,32. Even in such a case, the reinforcing sheets 31 and 32 are introduced into the mounting sheets 21 and 22 in the same manner as described above to obtain appropriate hardness, and at the same time, the resin portions are pressed against each other between the reinforcing sheets 31 and 32. The contact enhances the sealing performance of the rail fastener 100 .

The first and second fitting portions 11, 12 can have various shapes. 15 to 17 , the first fitting portion 11 is the female fitting portion 6 and the second fitting portion 12 is the male fitting portion 5 . The male fitting portion 5 is a columnar portion extending along the longitudinal direction of the rail fastener 100 and having a substantially circular cross section. A core cord is provided on the inner edge of the reinforcing sheet 32 and embedded in the column. Notches 901 are provided on both upper and lower sides of the mounting sheet 22 on the outer peripheral surface of the column, thereby forming upper and lower engaged surfaces 52e and 52f.

The female fitting part 6 is a C-shaped part having a lower jaw 61 and an upper jaw 62 to receive the posts of the male fitting part 5 . A core cord is provided on the inner edge of the reinforcing sheet 31 and is embedded in the connecting portion between the lower jaw 61 and the upper jaw 62 . A passage 302 communicating with the receiving space 65 is formed between the distal end of the lower jaw 61 and the distal end of the upper jaw 62 . The tip of the lower jaw 61 is provided with a lower locking projection 63 protruding toward the inside of the receiving space 65 so as to fit into the notch 901 of the pillar portion of the male fitting portion 5 . Similarly, the tip of the upper jaw 62 is provided with an upper locking projection 64 protruding toward the inside of the receiving space 65 so as to fit into the notch 901 of the post of the male fitting portion 5 . The lower and upper locking projections 63, 64 are provided with lower and upper locking surfaces 63s, 64s. 52e. 15 to 17, the first contact surface 71 is the surface that defines the receiving space 65 of the female fitting 6. As shown in FIGS. The second contact surface 72 is the outer peripheral surface of the column.

Based on the above teachings, a person skilled in the art can make various modifications to each embodiment and each feature. Various other shapes other than those disclosed herein can be employed for the mating portions 11 and 12 . The reinforcing sheet is not limited to a single layer, and may be multi-layered. For example, the reinforcing sheet is a laminate of fabric and paper. Reference signs in the claims are for reference only and should not be construed for the purpose of limiting the scope of the claims.

Reference Signs List 1 : Stringer 2 : Stringer 5 : Male fitting part 6 : Female fitting part 10 : Rail part 11 : Fitting part 12 : Fitting part 21 : Mounting sheet 21a : Inner edge 21b : Outer edge 22 : Mounting sheet 22a: inner edge 22b: outer edge 31: reinforcing sheet 32: reinforcing sheet 41: skin portion 42: skin portion 100: rail fastener

200: extruder 240: die 240a: die 240b: die

Claims (15)

1. A first stringer (1) comprising a first attachment seat (21) and a first fitting portion (11) and a second stringer (2) comprising a second attachment seat (22) and a second fitting portion (12) A rail fastener (100) in which the first and second fitting portions (11, 12) are fitted to form a rail portion (10),
   Said first mounting sheet (21) comprises a flexible first reinforcing sheet (31) and a tape from said first fitting (11) to at least partially cover said first reinforcing sheet (31). including a first skin portion (41) extending and made of the same resin as the resin of the first fitting portion (11),
   Said second mounting sheet (22) comprises a flexible second stiffening sheet (32) and from said second fitting (12) to at least partially cover said second stiffening sheet (32). including a second skin portion (42) extending and made of the same resin as the resin of the second fitting portion (12),
   Either of the following conditions (i) and (ii) are satisfied:
   (i) When the first and second fitting portions (11, 12) are fitted together, the first and second fitting portions (11, 12) are arranged at the inner edge ( A first contact surface (71) of the first skin portion (41) positioned outward of the seat than 31a) and an inner edge (32a) of the second reinforcing sheet (32) positioned outward of the seat. and ( ii) When the first and second fitting portions (11, 12) are fitted, the first and second fitting portions (11, 12) are fitted together, the inner edge (31a) of the first reinforcing sheet (31) ) and the inner edge (32a) of the second reinforcing sheet (32). A rail, wherein the second contact surface (72) of the second mating portion (12) is configured to press against each other between the first and second reinforcing sheets (31, 32). fastener.
2. The rail fastener according to claim 1, wherein the condition (i) is satisfied,
   Said first mating part (11) is a male mating part (5) comprising at least a male protrusion (52) and said second mating part (12) comprises said male protrusion (52). a female fitting (6) having a receiving space (65) for receiving and configured to prevent disengagement of said male projection (52) from said receiving space (65); rail fastener.
3. The rail fastener according to claim 2, characterized in that the female fitting part (6) is provided such that the receiving space (65) is arranged on the second reinforcing sheet (32).
4. The female fitting part (6) has a locking projection (63) provided with a locking surface (63s) that prevents the male projection (52) from being detached from the female fitting part (6). 4. A rail fastener according to claim 3, wherein said locking surface (63s) is positioned on said second stiffening sheet (32).
5. said female fitting (6) comprises a lower jaw (61) and an upper jaw (62) oppositely arranged to define said receiving space (65);
   The lower jaw (61) includes a lower locking projection (63) projecting upward to have a lower locking surface (63s) and the upper jaw (62) to have an upper locking surface (64s). including a downwardly projecting upper locking projection (64);
   Said male projection (52) is an arrow-shaped projection having a neck (52a) and a head (52b), said head (52b) protruding downward to have a lower latching surface (52f). a lower locked portion (52d) and an upper locked portion (52c) protruding upward to have an upper locked surface (52e);
   A rail fastener according to claim 3 or 4, characterized in that said lower locking surface (63s) and said upper locking surface (64s) are positioned on said second stiffening sheet (32).
6. The lower locking surface (63s) is inclined so as to approach the joint (68) of the lower jaw (61) and the upper jaw (62) as it extends upward, and the upper locking surface (64s) is inclined to approach said coupling portion (68) as it extends downwardly;
   The lower locked surface (52f) is inclined for contact with the lower locked surface (63s), and the upper locked surface (52e) is aligned with the upper locked surface (64s). 6. The rail fastener according to claim 5, wherein the rail fastener is slanted for contact with the .
7. The first contact surface (71) includes a convex surface projecting outward from the inner edge (31a) of the first reinforcing sheet (31), and/or the second contact surface (72). 7. The rail fastener according to any one of claims 1 to 6, characterized in that the second reinforcing sheet (32) includes a convex surface projecting outward from the inner edge (32a) of the second reinforcing sheet (32).
8. said male fitting (5) further comprising a closing wall (51) to which said male projection (52) is coupled;
   When the male fitting part (5) and the female fitting part (6) are fitted together, the male fitting part (5) and the female fitting part (6) are fitted together. 52) and one or more first contact points (P1) between said female fitting (6) and second contact points (P1) between said first contact surface (71) and said second contact surface (72) ( P2), the closing wall (51) and the female mating part (6) press against each other on the opposite side of the second contact point (P2) with respect to the male projection (52). 8. A rail fastener according to any one of claims 2 to 7, configured to have a third contact point (P3) that
9. Said female mating part (6) comprises a lower jaw (61) and an upper jaw (62) oppositely arranged to define said receiving space (65), said upper jaw (62) at said third contact point (P3). 9. A rail fastener according to claim 8, characterized in that ) and said closing wall (51) are in pressure contact with each other.
10. Said male projection (52) is an arrow-shaped projection having a neck (52a) and a head (52b), said head (52b) comprising an upper latched portion (52c) and a lower latched portion. (52d),
    The lower jaw (61) includes a lower locking projection (63) to which the lower locked portion (52d) is locked, and the upper jaw (62) has the upper locked portion (52c). including an upper locking projection (64) to be locked;
    The one or more first contact points (P1) include a contact point (P1a) where the upper locked portion (52c) and the upper locking projection (64) press against each other and contact, and the lower side. 10. The rail fastener according to claim 9, wherein the locked portion (52d) and the lower locking projection (63) include a contact portion (P1b) where they press against each other and come into contact.
11. The length (D3) of the neck (52a) in the insertion direction of the male projection (52) into the receiving space (65) of the female fitting (6) is defined by the closing wall (51) and the A contact point (N2) of the upper locking projection (64) with the closing wall (51) in a state where the upper locking projection (64) is sandwiched between the upper locked portion (52c) and the upper 11. Rail fastener according to claim 10, wherein the distance (D2) of the lowest points (N1) of the locking surfaces (64s) is less than or the minimum value of this distance (D2).
12. Any one of the following conditions (a)-(c) is satisfied:
    (a) each of said first and second reinforcing sheets (31, 32) comprises at least one selected from the group consisting of paper, nonwoven fabric, woven fabric and knitted fabric;
    (b) Both sides of the first reinforcing sheet (31) are covered with the first skin (41), and both sides of the second reinforcing sheet (32) are covered with the second skin (42); and (c) the layer thickness of the first skin portion (41) on at least one side of the first reinforcing sheet (31) is equal to or less than the thickness of the first reinforcing sheet (31), and the second reinforcing sheet ( 12. The rail fastener according to any one of claims 1 to 11, wherein the layer thickness of said second skin portion (42) on at least one side of 32) is equal to or less than the thickness of said second reinforcing sheet (32).
13. A step of supplying the resin material to the extruder (200) and extruding the first stringer (1) from the first die (240a) of the extruder (200), wherein the first stringer (1) is the first a step including a mounting sheet (21) and a first fitting portion (11);
    A step of supplying the resin material to the extruder (200) and extruding the second stringer (2) from the second nozzle (240b) of the extruder (200), wherein the second stringer (2) is the second A method for manufacturing a rail fastener including a step including a mounting sheet (22) and a second fitting portion (12),
    A flexible first reinforcing sheet (31) is supplied to the first nozzle (240a) to attach the first reinforcing sheet (31) to the first attachment sheet (21) of the first stringer (1). In the introducing step, the first reinforcing sheet (31) extends from the first fitting portion (11) and is made of the same resin as the resin of the first fitting portion (11). being at least partially covered by the first skin (41) of the mounting sheet (21);
    A flexible second reinforcing sheet (32) is supplied to the second nozzle (240b) to attach the second reinforcing sheet (32) to the second mounting sheet (22) of the second stringer (2). In the introducing step, the second reinforcing sheet (32) extends from the second fitting portion (12) and is made of the same resin as the resin of the second fitting portion (12). being at least partially covered by the second skin portion (42) of the mounting sheet (22);
    The discharge port (240m) of the first base (240a) is formed so as to be in a predetermined state when the first and second fitting portions (11, 12) are fitted to form the rail portion (10). and the position of the second reinforcing sheet (32) at the outlet (240n) of the second nozzle (240b) are set,
    The predetermined state includes the first contact surface (71) of the first fitting portion (11) and/or the first skin portion (41) and the second fitting portion (12) and/or the second contact surface (71). A method of manufacturing a rail fastener, comprising a state in which the second contact surfaces (72) of the skin portion (42) are pressed against each other between the first and second reinforcing sheets (31, 32).
14. The first mouthpiece (240a) is configured to form the first contact surface (71) on a convex surface projecting outward from the inner edge (31a) of the first reinforcing sheet (31). and/or the second base (240b) forms the second contact surface (72) on a convex surface projecting outward from the inner edge (32a) of the second reinforcing sheet (32). 14. The method of manufacturing a rail fastener according to claim 13, wherein the rail fastener is configured to
15. Said first fitting part (11) is a male fitting part (5) comprising at least a male projection (52) and a closing wall (51) to which said male projection (52) is coupled; The fitting part (12) has a receiving space (65) for receiving the male projection (52), and prevents the male projection (52) from being detached from the receiving space (65). a female fitting (6) shaped to
    The position of the second reinforcing sheet (32) at the discharge port (240n) of the second mouthpiece (240b) is such that the receiving space (65) of the female fitting part (6) is positioned so that the second reinforcing sheet (32) ), the manufacturing method of the rail fastener according to claim 13 or 14, wherein the rail fastener is set to be placed on the top.

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