zipper

Abstract

The present invention is a zipper (1) having left and right zipper tapes (10), at least one slider (20), and a stopper (30) for the slider (20) to abut against, the stopper (30) being fixed across the left and right zipper tapes (11) and having a shape in which a portion of the stopper (30) can be inserted between the upper wing plate (22) and the lower wing plate (23) of the slider (20), the interval in the tape width direction between the left and right zipper teeth (13) in a state in which the left and right zipper tapes (10) are separated is defined as a tooth interval (A), the maximum value of the dimension in the tape width direction of the connecting column (24) of the slider (20) is defined as a column maximum width (B), and the tooth interval (A) is a size of 100% or more and 150% or less of the column maximum width (B). Thus, when the slider (20) is caused to slide toward the stopper (30), it is difficult for the zipper teeth (13) to fall over in the vicinity of the stopper (30), and it is possible to suppress the zipper teeth (13) from being caught in the slider (20).

Description

Technical Field

[0001] The present invention relates to a zipper having a stopper that is fixed by the zipper tape spanning the left and right sides. Background Technology

[0002] As a type of zipper, a water-resistant zipper is known, which prevents liquids such as water from seeping into the back of the zipper tape (or from the back of the tape to the surface). In water-resistant zippers (hereinafter referred to as water-resistant zippers), there are cases where at least one of the surface and back of the zipper tape is provided with a waterproof layer formed of a thermoplastic resin or thermoplastic elastomer that can inhibit or prevent the seepage of liquids.

[0003] For example, in International Publication No. 2013 / 013007 (Patent Document 1), a stopper for a waterproof zipper was disclosed. Figure 6 The upper stop member 80 shown in Patent Document 1 has the following features: a main body portion 81 fixed across the left and right zipper straps; an abutment portion 82 integrally formed with the main body portion 81 and abutting against the upper wing plate of the zipper pull; a first extension portion 83 extending from the main body portion 81 toward one of the left and right zipper tooth rows; and a second extension portion 84 extending from the main body portion 81 toward the other of the left and right zipper tooth rows. Between the first extension portion 83 and the second extension portion 84, a receiving portion (gap) 85 for receiving the connecting post of the zipper pull is provided.

[0004] The abutting portion 82 of the upper stop member 80 has a shape corresponding to the shape of the shoulder end (front end) of the upper wing plate of the slider, such that no gap is formed between the abutting portion 82 and the upper wing plate when the upper wing plate of the slider abuts. The abutting portion 82 has left and right protrusions 82a provided on the left and right side edges of the abutting portion 82. The left and right protrusions 82a are formed to protrude from the left and right sides and surround the shoulder end of the upper wing plate.

[0005] The zipper with the upper stop 80 of Patent Document 1 can prevent the formation of a gap between the upper wing plate of the zipper head and the upper stop 80 when the zipper head abuts against the upper stop 80. Therefore, the zipper can stably perform its waterproof function when the left and right chain teeth are engaged.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: International Publication No. 2013 / 013007 Summary of the Invention

[0009] In a waterproof zipper having, for example, the upper stop 80 of Patent Document 1, when the zipper head slides toward the upper stop 80 and the left and right rows of zipper teeth engage, when the zipper head moves to a position close to the upper stop 80, the posture of the zipper teeth disposed near the upper stop 80 is tilted relative to the shoulder of the zipper head. As a result, there is a situation where the tilted zipper teeth get stuck at the shoulder of the zipper head. In the following description, the situation where the posture of the zipper teeth is tilted in such a way as to get stuck at the shoulder of the zipper head is expressed as zipper tooth tilting.

[0010] If the zipper teeth tilt as described above near the upper stop 80, the zipper teeth will become stuck in the zipper pull, causing the zipper pull to stop sliding midway through the tooth row. Consequently, the zipper pull can no longer make contact with the upper stop 80, thus compromising the zipper's waterproofing.

[0011] Furthermore, when the zipper is stored, for example, with the zipper head abutting against the upper stop 80, the portion of the zipper teeth approaching the upper stop 80 remains inserted within the zipper head's tooth guide path. Therefore, there is a situation where the left and right zipper teeth are maintained in a roughly Y-shaped bend along the zipper head's tooth guide path.

[0012] Furthermore, in waterproof zippers, a waterproof layer is provided on the zipper tape as described above to inhibit or prevent the intrusion of liquids. Therefore, if the left and right zipper teeth are maintained in a curved shape along the zipper tooth guide for a period of time, there is a situation where a portion of the zipper tape bends according to the curved shape of the zipper teeth, and the curved shape (bending mark) of the zipper tape is maintained by the waterproof layer and remains on the zipper tape.

[0013] In zippers where the zipper tape retains a bent shape, the zipper teeth near the top stop 80, as described above, are more prone to tilting, thus affecting the zipper's water-resistant properties. Therefore, in the past, zippers with tilted zipper teeth were rejected as defective products during inspection, resulting in a lower yield rate.

[0014] The present invention was made in view of the above-mentioned prior art problems, and its object is to provide a zipper in which, when the zipper head slides toward the stop, it is difficult for the zipper teeth to tilt near the stop, and the zipper teeth can be prevented from getting stuck on the zipper head.

[0015] To achieve the above objectives, the zipper provided by the present invention comprises: left and right zipper teeth, each having a plurality of synthetic resin zipper teeth with independent shapes on its side edges; at least one zipper pull slidably mounted on the rows of teeth of the left and right zipper teeth; and a stop member abutting against the zipper pull to limit its sliding range. The zipper pull has an upper wing plate, a lower wing plate separately disposed from the upper wing plate, and a connecting post connecting the upper wing plate and the lower wing plate. The stop member is fixed across the left and right zipper teeth, and a portion of the stop member can be inserted into the upper wing plate of the zipper pull. Regarding the shape between the lower wing plates, the zipper is characterized in that, in the state where the left and right zipper teeth are separated and at least the portions of the left and right zipper teeth rows that are close to the stop are held along the length direction of the zipper strip, the interval in the bandwidth direction between the zipper teeth adjacent to the stop in one zipper tooth row and the zipper teeth adjacent to the stop in the other zipper tooth row is defined as the tooth interval, the maximum value of the dimension in the bandwidth direction of the connecting post of the zipper pull is defined as the post maximum width, and the tooth interval is a size of 100% to 150% of the post maximum width.

[0016] In the zipper of the present invention, preferably, the stop member has: a stop member main body fixed to the left and right zipper strips; a first extension extending from the stop member main body toward one of the left and right zipper teeth rows; a second extension extending from the stop member main body toward the other of the left and right zipper teeth rows; and a post receiving portion disposed between the first extension and the second extension and receiving the connecting post of the zipper head, wherein the first extension and the second extension have an upper surface facing the upper wing plate and a lower surface facing the lower wing plate when the connecting post of the zipper head is received in the post receiving portion, and one of the upper surface and the lower surface of the first extension and the second extension has an insertion inclined portion that is inclined in a direction in which the dimension in the thickness direction of the first extension or the second extension gradually decreases toward the zipper teeth row.

[0017] In this case, preferably, the inner surface of at least one of the upper wing plate and the lower wing plate has an inner surface inclined portion, the inner surface inclined portion being inclined in a direction that gradually decreases toward the shoulder opening side of the pull head formed on the left and right sides of the connecting post in the direction of the thickness of the upper wing plate or the lower wing plate, and the insertion inclined portion of the first extension and the second extension has a shape corresponding to the inner surface inclined portion of the upper wing plate or the lower wing plate.

[0018] Furthermore, preferably, the interval in the bandwidth direction between the opposite side edges of the left and right zipper tapes at a position close to the stop is defined as the tape interval, the maximum value of the dimension in the bandwidth direction of the stop is defined as the maximum width of the stop, and the stop is formed with the ratio of the value of "maximum width of the stop - tape interval" to the maximum width of the stop set to 50% or more and 65% or less.

[0019] Furthermore, it is preferable that the first top end of the first extension opposite to the chain teeth and the second top end of the second extension opposite to the chain teeth are positioned at the same location relative to the length direction of the zipper tape.

[0020] Furthermore, in the zipper of the present invention, it is preferable that the maximum value of the width direction of the left and right zipper teeth that mesh with each other is defined as the maximum width of the meshing teeth, and the interval in the width direction between the opposite side edges of the left and right zipper strips at a position close to the stop is defined as the strip interval, and the strip interval is a size greater than or equal to the maximum width of the meshing teeth.

[0021] Invention Effects

[0022] According to the present invention, when the zipper head is slid toward the stop, it is difficult for the zipper teeth to tilt near the stop, thus preventing the zipper teeth from getting stuck on the zipper head. Attached Figure Description

[0023] Figure 1 This is a top view schematically illustrating an embodiment of the zipper of the present invention.

[0024] Figure 2 It is a schematic representation Figure 1 A three-dimensional view of the zipper stop shown.

[0025] Figure 3 It is a schematic representation Figure 2 The side view of the stop shown.

[0026] Figure 4 It means in Figure 1 The diagram shows the state of the zipper pull abutting against the stop.

[0027] Figure 5 It is a schematic representation Figure 4 A cross-sectional view of the section at the VV line shown.

[0028] Figure 6 It is a three-dimensional drawing representing a previous type of stop. Detailed Implementation

[0029] The following is a reference to the appendix. Figure 1The preferred embodiments of the present invention will be described in detail below. It should be noted that the present invention is not limited to any of the embodiments described below. Various modifications can be made as long as the present invention has a substantially the same structure and performs the same effect.

[0030] For example, the following embodiments describe a zipper that is waterproof, but the present invention is also applicable to zippers that are not waterproof. Furthermore, in the present invention, the specific shape, size, material, etc., of the zipper teeth are not particularly limited.

[0031] Figure 1 This is a schematic top view of the zipper according to this embodiment. Figure 2 and Figure 3 It is a schematic representation of the zipper stop and a side view. Figure 4 This is a schematic diagram showing the state of the slider abutting against the stop. It should be noted that... Figure 1 and Figure 4 In this diagram, to easily illustrate the positional relationships of the zipper teeth, stopper, and slider, only the slider is shown in cross-section. Additionally, in... Figure 2 and Figure 3 The illustration of the zipper strap is omitted in the text. Figure 4 The illustrations excluding the core thread of the zipper tape are omitted.

[0032] In the following explanation, regarding zippers, the front-back direction refers to the length direction of the zipper tape (tape length direction), which is the direction in which the zipper head slides along the zipper teeth. In this case, front refers to the direction in which the zipper head slides to engage the left and right zipper teeth, and back refers to the direction in which the zipper head slides to disengage the left and right zipper teeth.

[0033] The left-right direction refers to the width direction of the zipper tape, and is also parallel to the tape surface and orthogonal to the front-back direction. The up-down direction refers to the front-back direction orthogonal to the tape surface and back surface, and is also orthogonal to both the front-back and left-right directions. The up-down direction is along the height direction of the zipper pull and the thickness direction of the zipper tape. In this case, "above" refers to the direction relative to the side of the zipper pull body where the pull tab is mounted, and "below" refers to the direction opposite to "above".

[0034] The zipper 1 in this embodiment is waterproof. This zipper 1, as... Figure 1 As shown, it has: a pair of left and right zipper toothed belts 10; a zipper head 20 that is slidably mounted on the tooth rows 14 of the left and right zipper toothed belts 10; and a stop 30 that is abutted by the zipper head 20 to limit the sliding range of the front side (tooth engagement direction side) of the zipper head 20.

[0035] Each of the left and right zipper belts 10 has: a zipper belt 11 that is elongated in the front-back direction; and a plurality of synthetic resin zipper teeth 13 formed on the side edge of the zipper belt 11.

[0036] The zipper tape 11 has: a tape body portion that is installed on clothing or other products (zipper mounting component); and a tape side edge portion (also called a zipper tooth mounting portion) that extends inward from the tape body portion in the width direction. At the opposite tape end edges (tape end edges on the tape side edge side) of the left and right zipper tapes 11, core thread portions 12 with a shape that bulges in the direction of the tape back are respectively provided along the tape length direction.

[0037] Additionally, although not shown in the figures, the zipper tape 11 includes: a woven or braided tape body; and a waterproof layer disposed on at least one of the surface and back of the tape body. This waterproof layer is formed of a thermoplastic resin or a thermoplastic elastomer. By providing the waterproof layer, liquids such as water can be prevented from seeping from the surface of the zipper tape 11 to the back (or from the back to the surface). It should be noted that the material and method of forming the waterproof layer are not particularly limited in this invention. Furthermore, in this invention, the zipper tape may be formed without a waterproof layer.

[0038] The zipper teeth 13 are formed by injection molding thermoplastic resins such as polyacetal, polyamide, polypropylene, polybutylene terephthalate, nylon, and polycarbonate into the side edge of the zipper tape 11 to enclose the core wire portion 12 inside. Each zipper tooth 13 is not directly connected to other zipper teeth 13, but has an independent shape formed separately from the other zipper teeth 13.

[0039] Multiple zipper teeth 13 are arranged at constant intervals along the length direction on the side edges of the left and right zipper tapes 11, thereby forming left and right tooth rows 14 on the left and right zipper tapes 11 respectively. In this embodiment, among the left and right tooth rows 14, the zipper tooth 13 located closest to the stop 30 (i.e., the zipper tooth 13 located at the foremost side of the left tooth row 14) is called the first zipper tooth 13a, and the zipper tooth 13 located near the stop 30 after the first zipper tooth 13a (i.e., the zipper tooth 13 located at the foremost side of the right tooth row 14) is called the second zipper tooth 13b.

[0040] In this embodiment, each zipper tooth 13 has a shape substantially the same as that of conventional zipper teeth provided in waterproof zippers. To put it simply, each zipper tooth 13 has an upper half (first tooth half) 15 formed on the surface side of the zipper tape 11 and a lower half (second tooth half) 16 formed on the back side of the zipper tape 11.

[0041] The upper half 15 and lower half 16 of the zipper tooth 13 are connected to each other by a portion protruding from the core wire portion 12 of the zipper tape 11 in the width direction. In addition, they are connected to each other in a through hole (not shown) formed on the side edge of the zipper tape 11.

[0042] The upper half 15 of the zipper tooth has a tooth base fixed to the surface of the zipper tape 11, and a tooth head extending from the tooth base toward the engaging side of the zipper tape 10 along the width direction. The tooth base has a generally quadrilateral shape when viewed from above the zipper 1. The tooth head has a shape in which the length dimension of the tooth head gradually decreases toward the tip of the tooth head.

[0043] The lower half 16 of the zipper tooth 13 has a body fixed to the zipper tape 11, a neck extending from the body in the tooth width direction, and an engaging head continuously formed from the neck in the tooth width direction. The neck has a shape that tapers in length between the body and the engaging head. The engaging head has a generally oblong shape when viewed from below the zipper tooth 13. It should be noted that the shape of the zipper tooth 13 is not particularly limited in this invention.

[0044] The zipper pull 20 has a zipper pull body 21 through which the chain teeth 14 are inserted, and a pull tab (not shown) held in the zipper pull body 21. The zipper pull body 21 has: an upper wing plate 22; a lower wing plate 23 disposed separately from the upper wing plate 22; a connecting post 24 connecting one end (front end) of the upper wing plate 22 and one end (shoulder edge) of the lower wing plate 23; left and right upper flange portions 25 extending from the left and right side edges of the upper wing plate 22 toward the lower wing plate 23; left and right lower flange portions 26 extending from the left and right side edges of the lower wing plate 23 toward the upper wing plate 22; and a pull tab mounting portion (not shown) integrally provided on the upper surface of the upper wing plate 22 for mounting the pull tab. Figure 1 and Figure 5 wait).

[0045] At one end (front end) of the zipper pull body 21 in the front-rear direction, left and right shoulder openings are formed on both sides of the connecting post 24. At the other end (rear end) of the zipper pull body 21 in the front-rear direction, a rear opening is formed. Between the upper wing plate 22 and the lower wing plate 23, a roughly Y-shaped zipper tooth guide path is formed, connecting the left and right shoulder openings and the rear opening. Between the upper flange portion 25 and the lower flange portion 26 of the zipper pull body 21, a strap insertion gap is formed for the left and right zipper straps 11 to pass through.

[0046] In this zipper pull 20, viewed from above or below the zipper pull body 21, the leading edges (shoulder edges) of the upper wing plate 22 and the lower wing plate 23 opposite to the stop member 30 have a concave-convex shape relative to the bandwidth direction (left-right direction) in the front-back direction. Specifically, the leading edge of the upper wing plate 22 has: a central protrusion 27a disposed in the center of the bandwidth direction and protruding forward; left and right concave portions 27b that are concavely curved (or folded) on the left and right sides of the central protrusion 27a; and left and right lateral protrusions 27c disposed further outward of the left and right concave portions 27b and bulging forward. In addition, the leading edge of the lower wing plate 23 also has the same shape as the leading edge of the upper wing plate 22. It should be noted that in this invention, the shapes of the leading edges of the upper wing plate 22 and the lower wing plate 23 are not particularly limited.

[0047] The upper wing plate 22 has an upper surface (outer surface) exposed to the outside, and a lower surface (inner surface) disposed on the opposite side of the upper surface and opposite to the lower wing plate 23. The lower wing plate 23 has a lower surface (outer surface) exposed to the outside, and an upper surface (inner surface) disposed on the opposite side of the lower surface and opposite to the upper wing plate 22. The lower surface of the upper wing plate 22 and the upper surface of the lower wing plate 23 form the inner wall surface of the chain tooth guide. The lower surface of the upper wing plate 22 has an upper inner surface inclined portion 22a that gradually decreases in thickness dimension (dimension in the thickness direction) towards the front, forming the shoulder opening side. The upper surface of the lower wing plate 23 has a lower inner surface inclined portion 23a that gradually decreases in thickness dimension towards the front, forming the lower wing plate 23.

[0048] By providing the aforementioned upper inner surface inclined portion 22a and lower inner surface inclined portion 23a on the upper wing plate 22 and lower wing plate 23 respectively, when the zipper pull 20 slides forward (in the meshing direction of the zipper tooth row 14), the zipper teeth 13 can be easily guided from the left and right shoulder openings of the zipper pull body 21 into the zipper tooth guide path. It should be noted that the zipper pull body 21 of the present invention only needs to have at least one of the upper inner surface inclined portion 22a of the upper wing plate 22 and the lower inner surface inclined portion 23a of the lower wing plate 23, and preferably only the upper inner surface inclined portion 22a is required.

[0049] The stop member 30 in this embodiment is formed by injection molding of a polyurethane-based or polyvinyl chloride-based thermoplastic elastomer. It should be noted that the material of the stop member 30 is not particularly limited. The stop member 30 is positioned adjacent to the front end of the left and right zipper strips 14, straddling the left and right zipper tapes 11, so as to abut against the zipper head 20 (zipper head body 21) which slides along the zipper teeth 14. By providing the stop member 30 in front of the left and right zipper teeth 14, the sliding range of the front side (engaging direction side) of the zipper head 20 is limited.

[0050] The stop member 30 has a first stop portion (upper half) formed on the surface side of the zipper tape 11 and a second stop portion (lower half) formed on the back side side of the zipper tape 11. The first stop portion and the second stop portion are integrally connected to each other in the region between the left and right zipper tapes 11, and are also integrally connected to each other in a through hole (not shown) formed on the side edge of the zipper tape 11. Therefore, the stop member 30 fixes a portion of the side edge of the zipper tape 11, including the core wire portion 12, between the first stop portion and the second stop portion to the zipper tape 11. In this case, the left and right core wire portions 12 are embedded in the stop member 30 in a straight line extending in the front-back direction.

[0051] The stop member 30 of this embodiment has a shape that is symmetrical about the left and right sides, based on an imaginary center line passing through the central portion in the width direction of the stop member 30 along the front-back direction. The stop member 30 has: a stop member main body 31 that is mounted on and fixed to the left and right zipper tapes 11; a first extension 41 that extends rearward from the stop member main body 31 toward the left side of the zipper tooth row 14; and a second extension 42 that extends rearward from the stop member main body 31 toward the right side of the zipper tooth row 14.

[0052] Between the first extension 41 on the left and the second extension 42 on the right, a space is provided as a column receiving portion 43 for receiving the connecting column 24 of the zipper pull body 21. The stop body 31 has upper side holes 32 recessed from the upper surface of the stop body 31 to the left and right sides of the zipper tape 11 (core wire portion 12), and lower side holes 33 recessed from the lower surface of the stop body 31 to the left and right sides of the zipper tape 11 (core wire portion 12). The two upper side holes 32 and the two lower side holes 33 are formed by pressing pins that position the zipper tape 11 by pressing it from the back direction of the tape in the molding die during the injection molding of the stop 30.

[0053] The stop body 31 of the stop 30 has a generally quadrilateral shape when viewed from above. This generally quadrilateral stop body 31 has left and right sidewalls 34, a front wall 35 located at the front end of the stop body 31, and an abutment wall 36 located at the rear end of the stop body 31. The left and right sidewalls 34 are arranged perpendicularly to each other in the front-rear direction when viewed from above. The front wall 35 is continuously provided from the front end of the left sidewall 34 to the front end of the right sidewall 34.

[0054] The abutting wall portion 36 of the stop body 31, viewed from above by the stop 30, has a concave-convex shape relative to the bandwidth direction (left-right direction) in the front-back direction. The concave-convex shape of the abutting wall portion 36 follows the concave-convex shape provided on the upper wing plate 22 of the zipper pull body 21. Specifically, in order to accommodate the central protrusion 27a and the left and right side protrusions 27c provided on the upper wing plate 22 of the zipper pull body 21, a central recess 36a and left and right side recesses 36c are respectively provided on the abutting wall portion 36. Between the central recess 36a and the left and right side recesses 36c, a protrusion 36b corresponding to the left and right recesses 27b provided on the upper wing plate 22 is provided.

[0055] As described above, the abutting wall portion 36 of the stop body portion 31 and the front end portion of the upper wing plate 22 have corresponding concave and convex shapes, thereby making it difficult for a gap to form between the pull head 20 and the stop 30 when the pull head 20 abuts against the stop 30. In addition, it makes it difficult for the relative position of the pull head 20 relative to the stop 30 to become misaligned.

[0056] The stop body 31 includes: a flat first stop body 37, the portion of which, except for the upper hole 32 and the lower hole 33, is formed with a constant thickness; and a second stop body 38, which is located at the rear end of the stop body 31 and is formed with a thickness greater than that of the first stop body 37. In this embodiment, the lower surfaces of the stop body 31, the first extension 41 on the left side, and the second extension 42 on the right side, except for the lower hole 33, are formed as flat, single surfaces orthogonal to the vertical direction and without unevenness or layering. Furthermore, the aforementioned abutment wall 36 of the stop body 31 is formed in the second stop body 38.

[0057] The upper surface of the first stop body 37, except for the upper side hole 32, is formed as a flat surface orthogonal to the vertical direction. The second stop body 38 has an upper surface 38a arranged parallel to the upper surface of the first stop body 37; and an inclined surface 38b that slopes downwards from the upper surface 38a of the second stop body 38 to the upper surface of the first stop body 37. When the pull head body 21 abuts against the abutting wall 36 of the stop body 31, the upper surface of the second stop body 38 is arranged parallel to the upper surface of the upper wing plate 22 at the same height (vertical position) as the upper surface of the upper wing plate 22.

[0058] The stop body 31 is formed by the first stop body 37 and the second stop body 38 described above. This allows the upper wing plate 22 of the zipper pull 20 to stably abut against the stop body 31, and makes it easier to ensure a large fixing area relative to the surface and back of the zipper tape 11, thereby improving the fixing strength of the stop 30 relative to the zipper tape 11. Furthermore, in a top view of the stop 30, the thin, flat first stop body 37 is formed to be larger than the second stop body 38, thereby suppressing a decrease in the flexibility of the stop 30 (especially its flexibility in the vertical direction).

[0059] Furthermore, for example, when the zipper 1 of this embodiment is installed on a zipper mounting component such as clothing, there may be a situation where the zipper tape 11 and the stop member 30 overlapping the zipper mounting component are sewn together. In this case, since the first stop member main body 37 of the stop member 30 is formed thin, and the inclined surface 38b of the second stop member main body 38 of the stop member 30 is provided in the left-right direction as described above, the above-mentioned sewing can be easily performed. In addition, by making the inclined surface 38b of the second stop member main body 38 form in the left-right direction, the stop member 30 can be formed with a smooth design, thereby improving the appearance quality of the stop member 30.

[0060] The first extension 41 on the left and the second extension 42 on the right extend rearward from the abutment wall 36 of the second stop body 38. At least the core wire portion 12 of the zipper tape 11 is embedded vertically in the first extension 41 and the second extension 42 along the front-rear direction, respectively. In this case, the tape spacing between the left and right zipper tapes 11 extending rearward from the stop 30 along the front-rear direction (in other words, the width direction interval between the left and right core wire portions 12) is determined as the tape spacing D. In particular, the tape spacing D is determined based on the interval between the left and right zipper tapes at a position close to the stop 30, as described later.

[0061] Furthermore, in this embodiment, such as Figure 1 As shown, the tape interval D is mainly determined by measuring the distance between the left and right zipper tapes 11 between the stop 30 and the zipper teeth 13. However, when at least the core portion 12 of the zipper tape 11 is embedded vertically in the stop 30 along the front-back direction, the tape interval D in this invention can also be determined by measuring the distance between the left and right zipper tapes 11 further forward of the stop 30 (in the direction opposite to the direction extending from the stop 30 towards the zipper teeth row in the length direction).

[0062] When the zipper pull 20 abuts against the abutment wall 36 of the stop 30 and the connecting post 24 of the zipper pull body 21 is received into the post receiving portion 43 of the stop 30, the first extension 41 and the second extension 42 are inserted into the chain tooth guide path formed between the upper wing plate 22 and the lower wing plate 23 of the zipper pull body 21 and are received therein. In this case, the first extension 41 and the second extension 42 have an upper surface facing the upper wing plate 22 and a lower surface facing the lower wing plate 23, respectively.

[0063] Preferably, when the first extension 41 and the second extension 42 are housed within the chain tooth guide of the zipper body 21, at least a portion of the upper surface and at least a portion of the lower surface of the first extension 41 and the second extension 42 are in contact with or in close contact with the lower surface (inner surface) of the upper wing plate 22 and the upper surface (inner surface) of the lower wing plate 23, respectively. The lower surfaces of the first extension 41 and the second extension 42 are arranged orthogonally to the vertical direction as described above and are formed flat.

[0064] The first extension 41 on the left side is provided with: a first insertion inclined portion 41a, which is disposed on the upper surface of the first extension 41 and is inclined in a direction that gradually decreases in the thickness dimension (dimension in the thickness direction) of the first extension 41; a first flange abutment portion 41b, which is disposed on the left edge of the first extension 41; and a first top end portion (first rear end portion) 41c, which becomes the top surface opposite to the first zipper tooth 13a.

[0065] The first insertion inclined portion 41a is connected to the abutting wall portion 36 of the stop body portion 31. Furthermore, the first insertion inclined portion 41a has a shape that slopes downwards from the portion connected to the abutting wall portion 36 toward the rear (towards the left-side chain tooth row 14). This first insertion inclined portion 41a is formed in the front-rear direction within the range between the abutting wall portion 36 and the position where the first flange abutting portion 41b is located.

[0066] The first insertion inclined portion 41a is shown, for example, in a cross-sectional view orthogonal to the width direction of the stop 30 and the pull head 20 (see, for example, reference). Figure 5 The first insertion inclined portion 41a has a shape corresponding to the inclined portion 22a of the upper inner surface (for example, a shape parallel or substantially parallel to the inclined portion 22a of the upper inner surface), such that when the zipper pull 20 abuts against the abutting wall 36 of the stop member 30, the first insertion inclined portion 41a can face the aforementioned inclined portion 22a of the upper inner surface of the upper wing plate 22. Therefore, when the zipper pull 20 abuts against the abutting wall 36 of the stop member 30, the zipper 1 can suppress the formation of a gap between the zipper pull 20 and the stop member 30, thus stably possessing water-stopping properties that prevent the intrusion of liquids such as water.

[0067] In this embodiment, the first insertion inclined portion 41a is provided only on the upper surface side of the first extension portion 41, and not on the lower surface side. Therefore, compared to the case where, for example, the first insertion inclined portion 41a is provided on both the upper and lower surfaces of the first extension portion 41, the first extension portion 41 can be formed thinner, thus improving the flexibility of the stop member 30. Furthermore, when the stop member 30 is overlapped onto the zipper mounting member and sewn, a needle can be easily inserted into the first extension portion 41.

[0068] The first flange abutment portion 41b of the first extension portion 41 is disposed adjacent to the outer sidewall portion disposed on the left side of the first extension portion 41. In this case, the outer sidewall portion of the first extension portion 41, viewed from above by the stop 30, is continuously formed from the sidewall portion 34 on the left side of the stop body portion 31 in a manner that does not form a layer difference. In addition, a first ridge portion 41d is provided between the first flange abutment portion 41b of the first extension portion 41 and the outer sidewall portion 34, and the same second ridge portion 42d is provided in the second extension portion 42 as described later. Therefore, the stop 30 of this embodiment does not have left and right protrusions 82a as provided in the upper stop 80 of Patent Document 1 (see above). Figure 6 It is formed in a manner that allows the overall width dimension (dimension in the width direction) of the stop 30 to be smaller than, for example, the upper stop 80 of the aforementioned document 1, thereby enabling miniaturization of the stop 30, etc.

[0069] The first top end portion 41c of the first extension 41 is disposed opposite to the first zipper tooth 13a and is formed as a plane orthogonal to the front-back direction. The core thread portion 12 of the zipper tape 11 on the left extends rearward from the first top end portion 41c.

[0070] The second extension 42 on the right side is formed symmetrically with respect to the first extension 41 on the left side. Therefore, the shape of the second extension 42 will be described simply. The second extension 42 includes: a second insertion inclined portion 42a provided on the upper surface of the second extension 42; a second flange abutment portion 42b provided on the right edge of the second extension 42; and a second top end portion (second rear end portion) 42c opposite to the second zipper tooth 13b. A second ridge portion 42d is provided between the second flange abutment portion 42b and the outer sidewall portion disposed on the right side of the second extension 42. The core portion 12 of the zipper tape 11 on the right side extends rearward from the second top end portion 42c.

[0071] In a zipper 1 having the left and right zipper teeth 10, a zipper pull 20, and a stop 30 as described above, by sliding the zipper pull 20 forward (in the zipper tooth engagement direction) toward the stop 30, the left and right zipper tooth rows 14 can be engaged sequentially. Furthermore, by keeping the zipper pull 20 in contact with the stop 30, the zipper 1 can be made waterproof, preventing liquids such as water from seeping from the surface of the zipper 1 to the back side (or from the back side to the surface).

[0072] In this embodiment, for example, Figure 1 As shown, when the zipper teeth 14 of the left and right zipper teeth 10 are separated at the front end, the interval in the bandwidth direction between the left and right zipper teeth 13 at the separated part is defined as "tooth interval A". In addition, the maximum value of the dimension in the left and right direction (bandwidth direction) of the connecting post 24 of the zipper head 20 is defined as "post maximum width B".

[0073] Here, with the left and right zipper tooth rows 14 separated, and with at least the portion of the left and right zipper tooth rows 14 or the left and right core wire portions 12 near the stop 30 held straight from the stop 30 along the front-back direction (belt length direction), the tooth spacing A is the spacing in the bandwidth direction from the top position of the tooth head or engaging head of the left zipper tooth 13 to the top position of the tooth head or engaging head of the right zipper tooth 13. In particular, as Figure 1 As shown, the zipper tooth spacing A refers to the interval in the bandwidth direction from the top position of the first zipper tooth 13a, which is located closest to the stop member 30 in the left zipper tooth belt 10, to the top position of the second zipper tooth 13b, which is located closest to the stop member 30 in the right zipper tooth belt 10.

[0074] In this case, the zipper 1 of this embodiment is formed such that the zipper tooth spacing A is 100% to 150% of the maximum width B of the post, preferably greater than 100% and less than 150% of the maximum width B of the post.

[0075] By setting the zipper tooth spacing A to 100% or more (preferably greater than 100%) of the maximum width B of the zipper post, the left and right zipper teeth 13 can be positioned further apart from each other than in conventional zippers. For example, in this embodiment, as... Figure 1As shown, the maximum value of the width direction of the interlocking left and right zipper teeth 13 is defined as the maximum width C of the interlocking teeth, and the width direction interval between the opposing side edges of the left and right zipper strips 11 at a position close to the stop 30 (in other words, the width direction interval between the left and right core wire portions 12) is defined as the strip interval D. In this case, the strip interval D can be ensured to be large in a way that is greater than or equal to the maximum width C of the interlocking teeth. It should be noted that the strip interval D (the width direction interval between the side edges) refers to the interval between the left and right zipper strips 11 when the tooth rows 14 of the left and right zipper tooth strips 10 are separated and the left and right core wire portions 12 are held straight from the stop 30 in the front-back direction.

[0076] After repeated investigations and studies into the causes of zipper tooth tipping in conventional zippers, the following points were clarified: In conventional zippers, when the zipper head slides to a position close to the stop, the gap between the left and right zipper teeth (first and second zipper teeth) adjacent to the stop is kept narrow because the core wire is fixed to the stop. However, the left and right zipper teeth, which are guided from the shoulder of the zipper head body into the tooth guide path, are forced to move left and right due to the connecting post of the zipper head body, widening the gap between the left and right zipper teeth. At this time, the left and right zipper teeth tend to tilt in order to create a gap, resulting in a tendency for zipper teeth to tip over. Furthermore, because the left and right zipper teeth are in contact with the connecting post of the zipper head body, a large frictional force is generated between the zipper teeth and the connecting post, making it even easier for zipper teeth to tip over.

[0077] In contrast, in the zipper 1 of this embodiment, as described above, the tooth spacing A is 100% or more of the maximum width B of the post. Furthermore, the aforementioned band spacing D is a size equal to or greater than the maximum width C of the engaging teeth. Therefore, even when the zipper head 20 slides to a position close to the stop 30, the left and right zipper teeth 13, which are guided from the shoulder opening of the zipper head body 21 into the tooth guide path, will not move left or right due to the connecting post 24, thus preventing the spacing between the left and right zipper teeth 13 from being forcibly widened. Additionally, the frictional force generated between the zipper teeth 13 and the connecting post 24 of the zipper head 20 can be reduced.

[0078] As a result, even if the zipper pull 20 is slid to a position close to the stop 30, it is difficult for the zipper teeth 13 to tip over. In particular, in the zipper 1 of this embodiment, even if, for example, a portion of the zipper tape 11 remains in a bent shape (mark) due to long-term storage with the zipper pull 20 abutting against the stop 30, the zipper teeth 13 are difficult to tip over when the zipper pull 20 slides because the tooth spacing A is set to more than 100% of the maximum width B of the post.

[0079] Therefore, in the zipper 1 of this embodiment, the problem of conventional zippers where the zipper head cannot slide to the upper stop and thus the water-stopping performance is compromised can be eliminated, enabling the zipper 1 to stably perform its water-stopping function. Furthermore, as a result, the number of defective zippers 1 can be reduced, increasing the yield rate.

[0080] Furthermore, in this embodiment, by making the zipper tooth spacing A more than 100% of the maximum post width B, even when the zipper pull 20, which abuts against the stop member 30, slides in the direction that separates the left and right rows of zipper teeth 14 (rearward), the frictional force generated between the zipper teeth 13 and the connecting post 24 of the zipper pull 20 can be reduced. As a result, the sliding of the zipper pull 20 can be started with a lighter force than conventional zippers, thus improving the operability (especially the starting performance) of the zipper pull 20.

[0081] On the other hand, by setting the tooth spacing A to 150% or less of the maximum width B of the column (preferably less than 150%, and especially preferably 140% or less), when the zipper head 20 slides forward (in the meshing direction of the tooth row 14), it is possible to prevent the left and right zipper teeth 13 from interfering with the left and right upper flanges 25 and lower flanges 26 of the zipper head body 21. Therefore, the left and right zipper teeth 13 can be smoothly guided from the left and right shoulder openings of the zipper head body 21 into the tooth guide path, allowing the zipper head 20 to slide smoothly. Thus, the operability of the zipper head 20 can be improved. Furthermore, when the zipper head 20 is held against the stop 30, although the left and right zipper tapes 11 may locally bend near the stop 30, by setting the tooth spacing A to 150% or less of the maximum width B of the column, the aforementioned local bending of the zipper tapes 11 can be suppressed.

[0082] Furthermore, in the zipper 1 of this embodiment, when the zipper pull 20 abuts against the stop member 30, at least a portion of the first extension 41 and the second extension 42 of the stop member 30 can respectively contact or closely adhere to the lower surface (inner surface) of the upper wing plate 22 and the upper surface (inner surface) of the lower wing plate 23. Additionally, the first insertion inclined portion 41a provided on the first extension 41 and the second insertion inclined portion 42a provided on the second extension 42 can respectively face (preferably contact) the inclined portion 22a on the upper inner surface of the upper wing plate 22 of the zipper pull 20. Therefore, in the zipper 1 of this embodiment, even without providing, for example, the left and right protrusions 82a disposed on the upper stop member 80 as described in Patent Document 1 (see... Figure 6 It can also provide the water-stopping properties of zipper 1.

[0083] As a result, in this embodiment, the first flange abutment portion 41b and the second flange abutment portion 42b of the stop member 30 can be disposed adjacent to the outer sidewall portions of the first extension portion 41 and the second extension portion 42, and thus the width dimension of the stop member 30 can be reduced as described above.

[0084] Here, for example, the maximum value of the dimension in the left-right direction (width direction) of the upper wing plate 22 or the lower wing plate 23 is defined as the maximum width E of the pull head, and the maximum value of the dimension in the width direction of the stop 30 is defined as the maximum width F of the stop. In this embodiment, the aforementioned maximum width F of the stop 30 (stop body 31) is as follows: Figure 1 The dimensions shown are the width dimensions of the stop body 31 from the left sidewall 34 to the right sidewall 34. Furthermore, the sum of the width dimensions from the inner edge of the left core wire portion 12 to the left sidewall 34 of the stop 30, and from the inner edge of the right core wire portion 12 to the right sidewall 34 of the stop 30, is represented by the value of "the maximum width of the stop F - the strip spacing D" (hereinafter, this value is abbreviated as "FD"). In this case, the stop 30 of this embodiment is formed with the value of "FD" relative to the maximum width of the stop F set to 50% to 65%, preferably 53% to 63%. Additionally, the maximum width F of the stop 30 is greater than or equal to the maximum width E of the slider, and less than the value obtained by adding 1.0 mm to the maximum width E of the slider.

[0085] In the zipper 1 of this embodiment, as described above, the tooth spacing A is ensured to be larger than that of a conventional zipper, for example. Therefore, when the zipper pull 20 is slid to a position abutting against the stop 30 and the left and right tooth rows 14 are engaged, the difference between the spacing (with spacing D) between the left and right core wire portions 12 of the stop 30 and the spacing between the left and right core wire portions 12 at the points where the left and right zipper teeth 13 are engaged is larger than that of conventional zippers. As a result, the left and right zipper tapes 11 are prone to localized and strong bending along the left and right tooth rows 14, which bend approximately in a Y-shape within the zipper pull 20.

[0086] In this case, if the stop 30 is provided with left and right protrusions 82a as in, for example, the upper stop 80 of Patent Document 1, and is formed to be thick in the width direction (i.e., if the width dimension of the stop is large), then since the stop is fixed to the zipper tape 11, the fixed area of ​​the stop relative to the zipper tape 11 becomes larger, which easily leads to a decrease in the flexibility of the zipper tape 11. As a result, when the left and right zipper tapes 11 are locally strongly bent as described above, wrinkles or wavy unevenness are easily formed on the zipper tape 11, which leads to a decrease in the quality of the zipper and the product with the zipper installed (especially a decrease in appearance quality).

[0087] In contrast, in the zipper 1 of this embodiment, the stop 30 is formed so that the value of "FD" relative to the maximum width F of the stop is 65% or less (preferably 63% or less), and / or the maximum width F of the stop body 31 is less than the value obtained by adding 1.0 mm to the maximum width E of the zipper pull (preferably adding 0.9 mm). As a result, the fixed area of ​​the stop 30 relative to the zipper tape 11 is reduced, thus suppressing the decrease in flexibility of the zipper tape 11 caused by the fixing of the stop 30, and the zipper tape 11 can be formed more easily by bending. Consequently, even when the zipper tape 11 is locally and strongly bent around the time the zipper pull 20 comes into contact with the stop 30, it is difficult to produce wrinkles or wavy unevenness on the zipper tape 11.

[0088] Furthermore, by forming the zipper tape 11 in a flexible manner as described above, it is possible to prevent the left and right core wire portions 12 extending rearward from the stop member 30 from interfering with the upper flange portion 25 and the lower flange portion 26 of the zipper pull body 21. As a result, the zipper pull 20 can slide smoothly to the position where it abuts against the stop member 30 without being obstructed by the core wire portions 12.

[0089] Furthermore, by making the stop 30 thinner, material costs can be reduced. In addition, by ensuring that the maximum width F of the stop body 31 is large relative to the maximum width E of the slider within 1.0 mm, it is also possible to prevent the maximum width F of the stop body 31 from being smaller than the maximum width E of the slider due to dimensional tolerances.

[0090] Furthermore, in this embodiment, the stop member 30 is formed such that the value of "FD" is 50% or more (preferably 53% or more) relative to the maximum width F of the stop member, and / or the maximum width F of the stop member body 31 is 50% or more of the maximum width E of the zipper pull. This ensures appropriate fixing strength of the stop member 30 relative to the zipper tape 11. Additionally, when the zipper pull 20 abuts against the stop member 30, the left and right flanges of the zipper pull body 21 can easily abut against the first flange abutment portion 41b and the second flange abutment portion 42b of the stop member 30. Therefore, it is more difficult for a gap to form between the zipper pull 20 and the stop member 30, thus stably maintaining the water-stopping properties of the zipper 1.

[0091] In addition, in this embodiment, as described above, the chain tooth spacing A is ensured to be large, and the first extension 41 and the second extension 42 of the stop member 30 are formed with the same length dimension (dimension in the length direction), and the first top end 41c of the first extension 41 and the second top end 42c of the second extension 42 are arranged at the same position with respect to each other in the length direction.

[0092] Therefore, when the slider 20 abuts against the stop 30, it is easy to ensure the distance in the longitudinal direction between the first tip 41c of the first extension 41 and the second tip 42c of the second extension 42 and the upper flange 25 and lower flange 26 of the slider 20. Thus, it is easy to bend the left and right core wire portions 12 extending rearward from the first extension 41 and the second extension 42, making it less likely for the left and right core wire portions 12 to interfere with the upper flange 25 and lower flange 26 of the slider 20.

[0093] Furthermore, the core wire portion 12 can be stably fixed within the first extension portion 41 and the second extension portion 42, and the core wire portion 12 can extend rearward from the first end portion 41c and the second end portion 42c, thus preventing it from detaching from the first extension portion 41 and the second extension portion 42 outward in the width direction. In addition, by aligning the positions of the first end portion 41c of the first extension portion 41 and the second end portion 42c of the second extension portion 42 with each other, the starting performance when the pull head 20 slides from the position abutting against the stop member 30 can be further improved.

[0094] Furthermore, in the zipper 1 of the above-described embodiment, a slider 20 is installed on the left and right chain teeth 14, and a stop 30 is provided adjacent to the front end of the left and right chain teeth 14. However, in the present invention, the zipper may also form chain teeth on the front and rear sides of the stop, and a slider is installed on each of the front and rear chain teeth.

[0095] In this case, no chain teeth are formed in the part where the stop is set, and the chain teeth on the front side are separated from the chain teeth on the rear side by the stop. In addition, the stop has a stop body, a first extension and a second extension extending rearward from the stop body, and a first extension and a second extension extending forward from the stop body. Between the first extension and the second extension extending rearward, and between the first extension and the second extension extending forward, there is a column receiving part that can accommodate the connecting column of each zipper body.

[0096] Example

[0097] The present invention will be described in more detail below with examples.

[0098] (Examples 1 and 2, and Comparative Examples 1 to 3)

[0099] In Examples 1 and 2, and Comparative Examples 1 to 3, respectively, prepared Figure 1 A zipper as shown, having left and right zipper teeth 10, a zipper pull 20, and a stop 30.

[0100] In this case, the zipper of Embodiment 1 is formed with the tooth spacing A between the left and right zipper teeth 13 set to 105% of the maximum width B of the connecting post 24 of the zipper head 20. Similarly, the zipper of Embodiment 2 is formed with the tooth spacing A between the left and right zipper teeth 13 set to 147% of the maximum width B of the connecting post 24 of the zipper head 20. On the other hand, the zippers of Comparative Examples 1 to 3 are formed with the tooth spacing A between the left and right zipper teeth 13 set to 53%, 79%, and 158% of the maximum width B of the connecting post 24 of the zipper head 20, respectively.

[0101] Five zippers of Examples 1 and 2 and Comparative Examples 1 to 3 as described above were prepared respectively, and the quality of each zipper was evaluated by performing the following checks on each prepared zipper.

[0102] First, for each prepared zipper, by repeatedly dry cleaning at 65°C ten times with the zipper head 20 against the stop 30, an extremely curved shape (curved marks) is intentionally given to the area near the rear side of the stop 30 in the left and right zipper tapes 11.

[0103] Next, regarding the zipper with the left and right zipper tapes 11 bearing bending marks, the ability of the zipper pull 20 to slide near the stop 30 was checked by repeatedly sliding the zipper pull 20. Additionally, it was checked whether the zipper teeth 13 had tilted.

[0104] The results of the above inspection showed that in the zippers prepared in Example 1 (tooth spacing A = maximum post width B × 105%) and Example 2 (tooth spacing A = maximum post width B × 147%), even when the zipper pull 20 was slid forward (tooth engagement direction) and backward (tooth separation direction) near the stop 30, the zipper teeth 13 did not tilt, and the zipper pull 20 was able to slide smoothly.

[0105] On the other hand, it was confirmed that in Comparative Example 1 (tooth spacing A = maximum post width B × 53%) and Comparative Example 2 (tooth spacing A = maximum post width B × 79%), when the zipper pull 20 was slid toward the stop 30, the zipper teeth 13 tilted near the stop 30 and became stuck in the zipper pull 20. In the zippers where the tilting of the zipper teeth 13 was confirmed, the zipper pull 20 could not be slid to the position abutting against the stop 30, and the left and right rows of teeth 14 could not be fully engaged.

[0106] In each zipper prepared in Comparative Example 3 (zipper tooth spacing A = maximum width of the post B × 158%), when the zipper head 20 is slid forward, the left and right zipper teeth 13 collide with the upper flange 25 and lower flange 26 of the zipper head 20, thus hindering the sliding of the zipper head 20 and failing to close the zipper.

[0107] As described above, in the zippers of Embodiments 1 and 2, it was confirmed that the zipper pull 20 can slide smoothly along the zipper teeth 14. In addition, even if there are remaining bent shapes on the left and right zipper tapes 11, the zipper teeth 13 near the upper stop can be prevented from tilting and the water-stopping property can be stably maintained.

[0108] Explanation of reference numerals in the attached figures

[0109] 1 zipper

[0110] 10 zipper teeth

[0111] 11 Zipper Straps

[0112] 12-core wire section

[0113] 13 zipper teeth

[0114] 13a First zipper tooth

[0115] 13b Second zipper tooth

[0116] 14 chain teeth

[0117] 15. First chain tooth half (upper half of the chain tooth)

[0118] 16. Second chain tooth half (lower half of chain tooth)

[0119] 20 zipper heads

[0120] 21. Razor head carcass

[0121] 22 upper wing plate

[0122] 22a Upper inner surface inclined portion

[0123] 23 Lower Wing

[0124] 23a Lower inner surface inclined portion

[0125] 24 connecting posts

[0126] 25 Upper flange

[0127] 26 Lower flange portion

[0128] 27a central convex part

[0129] 27b concave part

[0130] 27c Lateral convexity

[0131] 30 pieces

[0132] 31 stop body part

[0133] 32 Upper side hole

[0134] 33 Lower side hole

[0135] 34 side wall portion

[0136] 35 Anterior wall portion

[0137] 36 Abutting Wall Part

[0138] 36a central recess

[0139] 36b convex part

[0140] 36c side concave portion

[0141] 37 No. 1 stopper main body

[0142] 38 2nd stopper main body part

[0143] 38a upper surface

[0144] 38b inclined surface

[0145] 41 First extension

[0146] 41a First insertion inclined part

[0147] 41b First flange contact portion

[0148] 41c First top part (first rear end part)

[0149] 41d First ridge section

[0150] 42 Second Extension

[0151] 42a Second Insertion Inclined Part

[0152] 42b Second flange contact portion

[0153] 42c Second apex portion (second rear end portion)

[0154] 42d second ridge section

[0155] 43 Pillar Containment Department

[0156] A. Chain tooth spacing

[0157] Maximum width of B-pillar

[0158] C Maximum width of meshing chain teeth

[0159] D-band spacing (inter-band distance)

[0160] E Maximum width of the zipper pull

[0161] F represents the maximum width of the stop component.

Claims

1. A zipper comprising: left and right zipper teeth (10), wherein a plurality of synthetic resin zipper teeth (13) having independent shapes are provided on the side edges of the zipper teeth (11); at least one zipper pull (20) slidably mounted on the rows of teeth (14) of the left and right zipper teeth (10); and a stop (30) for the zipper pull (20) to abut against and limit the sliding range of the zipper pull (20), the zipper pull (20) having an upper wing The zipper (1) comprises a plate (22), a lower wing plate (23) separately disposed from the upper wing plate (22), and a connecting post (24) connecting the upper wing plate (22) and the lower wing plate (23). A stop (30) is fixed across the left and right zipper straps (11) and has a shape in which a portion of the stop (30) can be inserted between the upper wing plate (22) and the lower wing plate (23) of the zipper head (20). With the left and right zipper teeth (10) separated and with at least the portions of the left and right zipper tooth rows (14) close to the stop (30) held along the length direction of the zipper tape (11), the interval in the bandwidth direction between the zipper tooth (13a) of one zipper tooth row (14) adjacent to the stop (30) and the zipper tooth (13b) of the other zipper tooth row (14) adjacent to the stop (30) is defined as the tooth interval (A). The maximum value of the dimension in the bandwidth direction of the connecting post (24) of the pull head (20) is defined as the maximum width of the post (B). The chain tooth spacing (A) is a size that is more than 100% and less than 150% of the maximum width (B) of the post.

2. The zipper as described in claim 1, characterized in that, The stop (30) has: a stop body portion (31) fixed to the left and right zipper tapes (11); a first extension portion (41) extending from the stop body portion (31) toward one of the left and right zipper teeth (14); a second extension portion (42) extending from the stop body portion (31) toward the other of the left and right zipper teeth (14); and a post receiving portion (43) disposed between the first extension portion (41) and the second extension portion (42) and receiving the connecting post (24) of the zipper head (20). The first extension (41) and the second extension (42) each have an upper surface facing the upper wing plate (22) and a lower surface facing the lower wing plate (23) when the connecting post (24) of the pull head (20) is housed in the post receiving portion (43). One of the upper and lower surfaces of the first extension (41) and the second extension (42) has an insertion tilt (41a, 42a) that is tilted in a direction in which the dimension of the first extension (41) or the second extension (42) in the thickness direction gradually decreases toward the chain tooth row (14).

3. The zipper as described in claim 2, characterized in that, At least one of the upper wing plate (22) and the lower wing plate (23) has an inner surface inclined portion (22a) on its inner surface. The inner surface inclined portion (22a) is inclined in a direction that gradually decreases in the thickness direction of the upper wing plate (22) or the lower wing plate (23) towards the shoulder opening side of the pull head (20) formed on the left and right sides of the connecting column (24). The insertion inclined portions (41a, 42a) of the first extension (41) and the second extension (42) have corresponding shapes to the inner surface inclined portion (22a) of the upper wing plate (22) or the lower wing plate (23).

4. The zipper as described in claim 2 or 3, characterized in that, The spacing in the bandwidth direction between the opposite side edges of the left and right zipper tapes (11) at a position close to the stop (30) is defined as tape spacing (D). The maximum value of the dimension of the stop (30) in the bandwidth direction is defined as the maximum width (F) of the stop. The stop (30) is formed by setting the value of "stop maximum width (F) - band gap (D)" relative to the stop maximum width (F) to be more than 50% and less than 65%.

5. The zipper as described in claim 2 or 3, characterized in that, The first end portion (41c) of the first extension (41) opposite to the chain tooth row (14) and the second end portion (42c) of the second extension (42) opposite to the chain tooth row (14) are positioned at the same location relative to the length direction of the zipper tape (11).

6. The zipper as described in any one of claims 1 to 3, characterized in that, The maximum value of the dimension in the bandwidth direction of the left and right zipper teeth (13) that mesh with each other is defined as the maximum width (C) of the meshing teeth. The spacing in the bandwidth direction between the opposite side edges of the left and right zipper tapes (11) at a position close to the stop (30) is defined as tape spacing (D). The band gap (D) is the size above the maximum width (C) of the meshing teeth.

Images