zipper

Abstract

The zipper includes a pair of fastener stringers 4 adjacent in a width direction, a reverse opening member 10 including a pair of rod members 5a, 5b disposed on a rear side with respect to the pair of fastener stringers respectively, a pair of core wire members fixing the pair of fastener stringers and the pair of rod members at the same position in the width direction respectively, and a pair of sliders 8A, 8B. The rod member includes a rod body 50a, 50b fixed to the core wire member, a fin 60a, 60b protruding from the rod body to an outer side in the width direction and placing a cloth 7, and a tooth row 80A, 80B including three or more teeth 81a~, 81b~ protruding from the rod body to an inner side in the width direction and spaced apart in a front-rear direction. A gear conveying the fastener stringer engages with an inner side in the width direction of the fastener stringer and the teeth of the tooth row in the case of sewing the cloth. In the tooth row, the tooth located further in the rear with respect to the protruding amount to the inner side in the width direction of the core wire member is smaller. By the shape of the tooth row, the connecting post of the slider on the rear side becomes less likely to hit the tooth row, and the operability is improved.

Description

Technical Field

[0001] This invention relates to a zipper including a reversible opening element. Background Technology

[0002] In some zippers, a core thread member is used as a component to fix a tooth row containing multiple teeth. In this case, the fabric is conveyed while the tooth row is engaged with a conveying gear, and the fabric along the tooth row is sewn onto the core thread member (Patent Document 1).

[0003] In detail, the zipper disclosed in Patent Document 1 includes: a pair of core wire members; a pair of chain teeth fixed to the pair of core wire members; a plug fixed to the core wire member on the rear side of one of the chain teeth; a seat bar fixed to the core wire member on the rear side of the other chain teeth; and a seat body fixed to the seat bar. The plug, seat bar, and seat body cooperate to form an opening member.

[0004] The insert and seat rod include a rod body extending front to back, fins extending outward from the rod body in the width direction, and a portion protruding inward relative to the rod body in the width direction. The protruding portion comprises teeth for meshing with a conveying gear in the case of sewing fabric, and includes two teeth extending outward and at a distance from each other.

[0005] Additionally, the opening mechanism includes a reverse opening mechanism, which comprises a push bar and a base bar. Zippers including a reverse opening mechanism include a pair of zipper pulls (Patent Document 2). In the zipper disclosed in Patent Document 2, the zipper teeth are fixed to the zipper tape, rather than to the core thread member. The fabric is sewn onto the zipper tape in a state where it is separated from the zipper teeth in the width direction.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2022-38070

[0009] Patent Document 2: Japanese Patent No. 4307413 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] In the case of the reverse opening mechanism disclosed in Patent Document 2, when the two sliders are moved until they can no longer move towards the reverse opening mechanism, the insert can be pulled out / inserted relative to the two sliders. Furthermore, when the insert is inserted into the reverse opening mechanism, the main body of the insert is housed inside both sliders. On the other hand, in the case of the open mechanism disclosed in Patent Document 1, when the main body of the insert is inserted into the base, the main body of the insert is housed inside one slider. Therefore, the length of the main body of the insert in the front-rear direction is longer in the reverse opening mechanism than in the open mechanism.

[0012] In the opening member disclosed in Patent Document 1, a conveying gear for sewing fabric meshes with two teeth. Based on the opening member disclosed in Patent Document 1, a reverse opening member is designed, comprising an insert rod fixed to one of the core wire members and a seat rod fixed to the other core wire member. In this case, since the length of the main body of the insert rod and the seat rod is longer than that of the opening member, the number of teeth extending from the main body of the rod is required to be greater than that of the opening member.

[0013] As is known, the zipper pull connects the upper and lower flanges via a connecting post. In the case of a reverse-opening mechanism, if the rear zipper pull is moved away from its position of contact with the reverse-opening mechanism, the insert rod body and the base rod body pass through the interior of the rear zipper pull while tilted relative to the front-rear direction. Furthermore, as the pair of rod bodies pass through the interior of the rear zipper pull, the teeth of the insert rod and the base rod face towards the connecting post. If the teeth of the insert rod and the base rod strongly contact the connecting post inside the rear zipper pull, a large force is required to move the rear zipper pull, resulting in poor operability. Additionally, in the case of a reverse-opening mechanism, if the teeth of the insert rod contact the connecting post of the front zipper pull when the insert rod is pulled out / inserted, it becomes difficult to pull out / inserte the insert rod.

[0014] This invention was created in consideration of the aforementioned actual situation, and its purpose is to improve the operability of the rear pull tab, making it easier to pull out / insert the insert bar relative to a pair of pull tabs.

[0015] Technical means to solve the problem

[0016] The zipper of the present invention includes: a pair of chain teeth; a pair of core wire members; a reverse opening member comprising a pair of bar members; and a pair of zipper pulls. The pair of chain teeth is formed by arranging multiple chain teeth in one row in the front-to-back direction and two rows in the width direction. The pair of core wire members fix the pair of chain teeth respectively in a state where the chain teeth are through. The pair of zipper pulls open / close the pair of chain teeth in opposite directions. The zipper pull includes an upper wing plate and a lower wing plate facing each other in the vertical direction, and a connecting post connecting the upper wing plate and the lower wing plate. The pair of bar members are respectively fixed to the pair of core wire members at the rear relative to the pair of chain teeth. Fabric is respectively mounted on the insert bar, which is one of the bar members, and the base bar, which is the other bar member. When the pair of zipper pulls accommodates the insert bar and the base bar, the insert bar can be pulled out relative to the pair of zipper pulls. The above is a premise of the zipper.

[0017] Based on this, the bar component includes a bar body, fins, and a toothed row. The bar body is fixed to the rear end of the core wire component and can be housed in the zipper head. The fins extend outward from the bar body in the width direction and are used to carry the fabric. The toothed row includes three or more teeth that extend inward from the bar body in the width direction and are spaced apart front to back. The inner portion of the toothed row in the width direction engages with the inner portion of the opposing toothed row in the width direction, and when sewing with the fabric along the toothed row, it engages with a conveying gear for conveying the toothed row. The teeth overlap vertically with respect to the teeth of the opposing bar component at least in a portion and engage with the conveying gear. Furthermore, the zipper of the present invention is characterized in that, in the toothed row, the amount of protrusion inward from the core wire component in the width direction is smaller towards the rear of the tooth.

[0018] Furthermore, in the insert bar, assuming that a simulated tooth simulating the shape of the preceding teeth is positioned at the position of the last tooth, the structure could be such that the rear surface of the last tooth is consistent with the rear surface of the simulated tooth. However, in order to improve the operability of the rear pull head by preventing the last tooth of the insert bar from hitting the connecting post of the rear pull head when the rear pull head moves forward from a state of contact with the reversing member, the following is ideally described.

[0019] In the insert, assuming that a simulated tooth is configured at the position of the last tooth, simulating the shape of the teeth preceding it, the rear surface of the last tooth is located further forward than the rear surface of the simulated tooth.

[0020] Because the rear surface of the last tooth of the insert is located further forward than the rear surface of the simulated tooth, it is less likely to hit the connecting post when operating the rear pull head, thus improving the operability of the rear pull head.

[0021] Even if the teeth of the insert rod and the base rod overlap vertically, they cannot move parallel to each other in the width direction. However, in this structure, when the teeth of the insert rod and the base rod move outward in the width direction by operating the rear pull head, friction occurs in the area outside the overlapping surface of the teeth, which is prone to damage. To prevent the teeth from being damaged, the following is ideal.

[0022] The teeth of the insert and the teeth of the base overlap vertically in at least a portion of their length in a manner that allows them to move parallel to each other outward in the width direction.

[0023] Whether or not the insert bar engages with the last chain tooth on the seat bar side, but in order to improve the integrity of the chain tooth row on the seat bar side relative to the seat bar while maintaining the operability of the rear pull head, it is ideally as described below.

[0024] The front part of the foremost tooth of the insert bar cooperates with the front end of the insert bar body to form a semi-engaged part that engages with the last chain tooth on the seat bar side. Based on this, the rear part of the foremost tooth of the insert bar is a first rear tooth portion, that is, a first rear tooth portion that extends rearward from the rear surface of either the upper or lower part of the semi-engaged part and overlaps with the foremost tooth on the seat bar side in the vertical direction.

[0025] In order to improve the integration of the insert bar and the base bar while maintaining the operability of the rear pull head, the frontmost teeth of the insert bar and the frontmost teeth of the base bar should ideally be as described below.

[0026] The foremost tooth of the insert bar causes the rear surface of the other of the upper and lower portions of the semi-engaged portion to be parallel to the rear surface of the first rear tooth portion and the width direction, or to be inclined relative to the width direction in a forward-facing manner as it moves inward toward the width direction. Furthermore, the foremost tooth of the seat bar includes: an upper tooth portion extending from the upper portion of the side surface of the seat bar's body in the width direction; and a lower tooth portion extending from the lower portion of said side surface. One of the upper and lower tooth portions includes a front tooth portion that extends forward relative to the other of the upper and lower tooth portions and overlaps with the first rear tooth portion. Furthermore, the other of the upper and lower tooth portions includes a second rear tooth portion that extends rearward relative to the other of the upper and lower tooth portions and overlaps with the second tooth of the insert bar from the front.

[0027] Regarding the base rod, the multiple teeth from the second tooth onwards from the front may extend from the same location as the rear teeth on the upper and lower parts of the side. However, to facilitate overlap between the teeth of the insert rod and the teeth of the base rod, it is ideal to proceed as described below.

[0028] The second and subsequent teeth of the seat bar extend from the portion of the upper and lower parts of the side where the second rear tooth belongs.

[0029] The effects of the invention

[0030] In the zipper of the present invention, among all the teeth of the tooth row of the bar member, the rear tooth of two adjacent teeth has a smaller protrusion inward in the width direction relative to the core wire member compared to the front tooth. Therefore, when the rear pull head moves forward from a state of contact with the reverse opening member, the amount of movement of the insert bar and the seat bar in the width direction when the tooth hits the connecting post of the rear pull head gradually increases each time the tooth that hits the connecting post becomes the front tooth. Inside the rear pull head, the bar body of the insert bar and the bar body of the seat bar gradually tilt in the front-rear direction, thus improving the operability of the rear pull head.

[0031] Furthermore, when inserting the insert bar into a pair of sliders, during the initial insertion phase, the rear part of the insert bar's body and the front part of the base bar's body face each other in the width direction inside the pair of sliders, and the insert bar is most tilted relative to the front-rear direction. At this phase, the last tooth of the insert bar is in a position where it most easily contacts the connecting post of the front slider. However, since the last tooth of the insert bar has the smallest protrusion among the teeth of the insert bar, it is less likely to contact the connecting post, making insertion easier. Additionally, as the insertion of the insert bar continues, the tilt relative to the front-rear direction decreases, and the teeth further forward than the last tooth of the insert bar sequentially approach the connecting post. Since the protrusion of the teeth gradually increases towards the front, insertion becomes easier. Furthermore, at the point where insertion is complete, the amount of overlap in the width direction between the front teeth of the insert bar and base bar in the vertical direction is greater, stabilizing the insert bar and base bar inside the slider. Moreover, when withdrawing the insert bar from the pair of sliders, it becomes easier to withdraw using the reverse technique of insertion. Attached Figure Description

[0032] [ Figure 1 [Illustration 1] is a plan view showing a chain component according to a first embodiment of the present invention.

[0033] [ Figure 2 [ ] is a plan view showing a portion of the zipper.

[0034] [ Figure 3 (A) and (B) are cross-sectional views viewed from below, showing the state of the insert rod being pulled out / inserted, and the AA-line cross-section.

[0035] [ Figure 4 (A) to (C) show the plan view, front view, and CC-line cross-section of the pull head.

[0036] [ Figure 5 (A) to (C) show the plan view, bottom view, and front view of the chain teeth.

[0037] [ Figure 6 [ ] is a plan view showing the reverse opening component.

[0038] [ Figure 7 ]yes Figure 6 Sectional view along line VII-VII.

[0039] [ Figure 8 [ ] is a bottom view showing the reverse opening part.

[0040] [ Figure 9 [ ] is a plan view showing the insert.

[0041] [ Figure 10 [ ] is a bottom view of the insert.

[0042] [ Figure 11 [ ] is a plan view showing the base rod.

[0043] [ Figure 12 [ ] is a bottom view of the base rod.

[0044] [ Figure 13 (A) to (D) are explanatory diagrams showing how the relationship between the insert bar and the base bar changes when the rear pull head is moved forward.

[0045] [ Figure 14 (A) to (C) are explanatory diagrams showing how the relationship between the insert and the base changes when the insert is inserted into a pair of pull heads.

[0046] [ Figure 15 [ ] is an explanatory diagram showing the state of the chain tooth component on the side of the delivery bar.

[0047] [ Figure 16 [ ] is an explanatory diagram showing the state of the chain tooth component on the side of the conveyor bar.

[0048] [ Figure 17 [This is an illustration showing the state of a pair of chain teeth components assembled with a pull head.] Detailed Implementation

[0049] Figure 1 The diagram shows a chain member 1 according to a first embodiment of the present invention. The chain member 1 extends in a straight line. The chain member 1 includes a pair of chain teeth 2a and 2b that extend in a straight line and engage with each other in a parallel state. If the engagement of the pair of chain teeth 2a and 2b is released, the pair of chain teeth 2a and 2b separate.

[0050] The direction will be specified in the following description as follows. "Back-to-back direction" refers to the direction in which chain component 1 extends in a straight line. The back-to-back direction is... Figure 1 The center direction aligns with the vertical direction. The forward direction is... Figure 1 The middle direction is upward. The rear direction is... Figure 1The "downward direction" is the direction perpendicular to the upward direction and is the direction in which a pair of chain tooth components 2a and 2b are adjacent. The left-right direction is also called the width direction, and is related to... Figure 1 The left and right directions are consistent. The left direction is... Figure 1 The left direction is... The right direction is... Figure 1 The right direction in the width direction. Regarding "inner side in the width direction," if we take a portion of the left-side chain tooth member 2a as an example, it refers to the right side based on that portion. Regarding "outer side in the width direction," if we take a portion of the left-side chain tooth member 2a as an example, it refers to the left side based on that portion. The "vertical direction" is a direction orthogonal to the front-back and left-right directions, also known as the thickness direction. The vertical direction is in... Figure 1 The center direction is the direction perpendicular to the paper. The top direction is... Figure 1 The direction orthogonal to the paper is towards the front. The downward direction is... Figure 1 The direction that is orthogonal to the paper and faces inwards.

[0051] The left-side chain member 2a includes: a core wire member 3 extending in the front-rear direction; a chain tooth row 4 fixed to the core wire member 3; a bar 5a fixed to the core wire member 3 rearward relative to the chain tooth row 4; and a guide portion 6a fixed to the core wire member 3 rearward relative to the bar 5a. In the figure, the left-side chain member 2a fixes the chain tooth row 4, the bar 5a, and the guide portion 6a one at a time relative to the core wire member 3 facing rearward, but in reality, the chain tooth row 4, the bar 5a, and the guide portion 6a are fixed repeatedly in a rearward direction relative to the core wire member 3.

[0052] The right-side chain tooth component 2b is roughly symmetrical to the left-side chain tooth component 2a, except that it uses the base bar 5b as another bar component. Therefore, it will be briefly described. The right-side chain tooth component 2b also includes the core wire component 3, the chain tooth row 4, the base bar 5b, and the guide part 6b.

[0053] A reverse opening member 10 is formed by inserting rod 5a and seat rod 5b.

[0054] By having a pair of chain teeth 4 meshing inside in the width direction, a pair of guides 6a and 6b meshing inside in the width direction, and the insert bar 5a and the seat bar 5b, which are a pair of bar members, overlapping in the vertical direction inside in the width direction, a pair of chain tooth members 2a and 2b are integrated to become chain member 1.

[0055] A pair of guide parts 6a and 6b are capable of engaging and disengaging.

[0056] The guide portion 6a on the insert rod side includes a plurality of guide teeth 16a arranged in a row in the front-rear direction. Each guide tooth 16a includes a guide body 16a1 extending through the core wire member 3 in the front-rear direction, and a guide engagement portion 16a2 protruding inward in the width direction relative to the guide body 16a1. All guide teeth 16a of the guide portion 6a may be of the same shape, but in this embodiment, multiple shapes are used.

[0057] The guide portion 6b on the side of the base bar also includes a plurality of guide teeth 16b arranged in a row in the front-rear direction. The guide teeth 16b also include a guide body 16b1 that extends through the core wire member 3 in the front-rear direction, and a guide engagement portion 16b2 that protrudes inward in the width direction relative to the guide body 16b1. All the guide teeth 16b of the guide portion 6b may be of the same shape, but in this embodiment there are multiple shapes.

[0058] The guide engagement portion 16a2 on the insert rod side and the guide engagement portion 16b2 on the seat rod side can engage and disengage.

[0059] The core member 3 is flexible. Therefore, the core member 3 deforms between the chain teeth 4 and the insert bar 5a, or between the chain teeth 4 and the base bar 5b. The core member 3 is, for example, a monofilament, a twisted thread, or a core body. The core body is a member formed by wrapping a core containing multiple bundled multifilaments in a bag woven from multiple braiding threads.

[0060] Chain link components 2a and 2b are fed toward the sewing machine, and fabric 7 is sewn onto a portion of chain link components 2a and 2b (see reference). Figure 2 After sewing, cut off the unsewn portions of the zipper teeth 2a and 2b. The portions of the zipper teeth 2a and 2b with sewn fabric 7 are called zipper teeth.

[0061] like Figure 3As shown, a zipper is completed by installing a pair of zipper pulls 8A and 8B onto a pair of zipper teeth. The pair of zipper pulls 8A and 8B can move back and forth along the pair of zipper teeth, opening and closing the pair of zipper teeth in opposite directions. The front zipper pull 8A of the pair of zipper pulls 8A and 8B moves forward when closing the pair of zipper teeth. The rear zipper pull 8B of the pair of zipper pulls 8A and 8B moves backward when closing the pair of zipper teeth. When the pair of zipper pulls 8A and 8B are arranged adjacent to each other with their rear openings facing each other, the insert bar 5a can be pulled out relative to the pair of zipper pulls 8A and 8B. That is, the bar member that can be pulled out / inserted relative to the pair of zipper pulls 8A and 8B is the insert bar 5a. When the insert bar 5a can be pulled out / inserted, the rear zipper pull 8B is located at the rearmost limit position within its range of motion. Additionally, the "rear opening" of the slider is the part through which a pair of chain teeth 4 pass when engaged. More specifically, the "rear" in "rear opening" refers to the direction relative to the front slider 8A. The "opening" in "rear opening" refers to the point where a pair of chain teeth 4 enters the slider from the outside.

[0062] The pair of zipper pulls 8A and 8B are identical in structure except for their orientation. The description of the rear zipper pull 8B will be given later, while the description of the front zipper pull 8A will be omitted. The rear zipper pull 8B includes: a zipper body 21 that opens / closes a pair of chain teeth 4 and is movable back and forth along the pair of chain teeth 4; and a pull tab 29 that is connected to the zipper body 21.

[0063] like Figure 4 As shown, the zipper pull body 21 includes: an upper wing plate 22 and a lower wing plate 23, which face each other at a distance in the vertical direction; a connecting post 24, which connects the rear portions of the upper wing plate 22 and the lower wing plate 23 facing each other at the middle portion in the horizontal direction, and is sandwiched between a pair of chain teeth 4; a zipper tab mounting portion 25 for mounting a zipper tab 29; and a flange 26, which protrudes from the left and right ends of the upper wing plate 22 and the lower wing plate 23 in a direction that reduces the vertical distance between the facing upper wing plate 22 and the lower wing plate 23. The zipper tab mounting portion 25 protrudes from above the upper wing plate 22 in the figure.

[0064] The lower surface of the upper wing 22 and the upper surface of the lower wing 23 face each other vertically. Details of the upper surface of the lower wing 23 will be described later.

[0065] The flange 26 includes: a parallel plate portion 26a, parallel to the front-rear direction; and an inclined plate portion 26b, which is continuous rearward relative to the parallel plate portion 26a and inclined relative to the front-rear direction. The inclined plate portion 26b is located outside the width direction relative to the connecting post 24 and is inclined relative to the front-rear direction in a state that it faces outward in the width direction as it moves rearward. The left and right flanges 26 engage the chain teeth 40 on the insert bar side and the chain teeth 40 on the base bar side between the left and right parallel plate portions 26a, and separate the chain teeth 40 on the insert bar side and the chain teeth 40 on the base bar side between the left and right inclined plate portions 26b and the connecting post 24.

[0066] Inside the zipper head body 21, there is a chain tooth path 21a that runs through the front and back direction and branches into two forks on the rear side, and a fabric groove 21b that leads to the chain tooth path 21a and opens to the left or right.

[0067] The chain tooth path 21a is separated from the outside of the slider body 21 in the vertical direction by the upper flange 22 and the lower flange 23. The chain tooth path 21a is separated from the outside of the slider body 21 in the horizontal direction by the left and right flanges 26. The chain tooth path 21a is separated from the outside of the slider body 21 at the rear by the connecting post 24.

[0068] The fabric groove 21b is located between the upper and lower opposing flanges 26.

[0069] A pair of chain teeth 4 pass through chain tooth path 21a, and the fabric 7 on the corresponding side passes through each fabric groove 21b. The above is the basic structure of the rear zipper pull 8B.

[0070] like Figure 1 As shown, the tooth row 4 includes a plurality of teeth 40 arranged in a row in the front-to-back direction. In a pair of tooth rows 4, the plurality of teeth 40 arranged in a row in the front-to-back direction are arranged in two rows in the width direction. The plurality of teeth 40 arranged in a row in the front-to-back direction are fixed to the core wire member 3 with a front-to-back gap. In the tooth row 4, the spacing between adjacent teeth 40 is the same. The teeth 40 are formed by injection molding of the core wire member 3. As a result, the core wire member 3 has a plurality of teeth 40 extending through it in the front-to-back direction. In addition, the core wire member 3 also has guide teeth 16a, guide teeth 16b, insert bar 5a and seat bar 5b extending through it in the front-to-back direction.

[0071] like Figure 5 As shown, the chain tooth 40 includes a body 41 through which the core wire member 3 passes in the front-rear direction, and an engagement portion 45 that engages with the chain teeth 40 of the opposing chain tooth row 4.

[0072] The engaging portion 45 protrudes inward in the width direction relative to the body 41. In this embodiment, the shape of the engaging portion 45 is symmetrical from front to back, and the upper part of the engaging portion 45 is different from the lower part of the engaging portion 45.

[0073] The upper part of the engagement portion 45 is plate-shaped with its thickness along the vertical direction, and is triangular in shape when viewed from above. The front surface 45a of the upper part of the engagement portion 45 is inclined relative to the left and right direction, facing rearward as it moves inward in the width direction. The rear surface 45b of the upper part of the engagement portion 45 is inclined relative to the left and right direction, facing forward as it moves inward in the width direction.

[0074] The lower part of the meshing portion 45 includes: a neck 45d that extends inward from the trunk 41 in the width direction; and a head 45e that extends inward relative to the neck 45d in the width direction and extends forward and backward.

[0075] When viewed from above, the neck 45d is hidden above the meshing portion 45 and cannot be seen visually. When viewed from above, the head 45e extends forward and backward relative to the upper part of the meshing portion 45. When viewed from below, the anterior surface 45d1 and posterior surface 45d2 of the neck 45d are symmetrically concave in a semi-circular shape, and the anterior surface 45e1 and posterior surface 45e2 of the head 45e are symmetrically bulging in a semi-circular shape.

[0076] The body 41 includes a front surface 41a and a rear surface 41b, an upper surface 41c and a lower surface 41d, and a side surface 41e extending outward in the width direction. A core wire member 3 passes through the central portion of the front surface 41a and the rear surface 41b of the body 41. The upper surface 41c and the lower surface 41d of the body 41 are guided by an upper wing plate 22 and a lower wing plate 23, and the side surface 41e extending outward in the width direction of the body 41 is guided by a flange 26.

[0077] like Figures 6-10 As shown, the insert 5a includes: a rod body 50a fixed to the core wire member 3; fins 60a extending from the outer side of the rod body 50a in the width direction; and a tooth row 80A including a plurality of teeth 81a to 84a extending from the inner side of the rod body 50a in the width direction.

[0078] The rod body 50a extends in the front-rear direction. The core wire member 3 passes through the front surface 51a and the rear surface 52a of the rod body 50a. In this case, the core wire member 3 is parallel to the front-rear direction. In addition, when the core wire member 3 is parallel to the front-rear direction, the rod body 50a is also parallel to the front-rear direction. The upper surface 53a and the lower surface 54a of the rod body 50a are formed as planes orthogonal to the vertical direction and are guided between the upper wing plate 22 and the lower wing plate 23. On the outer side of the rod body 50a in the width direction, an inwardly recessed portion 55a is formed in the middle part in the front-rear direction. An upwardly recessed toothed guide 56a is formed on the inner part of the lower surface of the rod body 50a in the width direction. When the insert rod 5a is pulled out / inserted relative to a pair of pull heads 8A, 8B, the toothed guide 56a guides the toothed row 80B of the seat rod 5b (described later). Details of the tooth guide 56a will be described later.

[0079] The fin 60a extends outward in the width direction relative to the rod body 50a. The fin 60a is located above the lower surface 54a of the rod body 50a and below the upper surface 53a of the rod body 50a. A through hole 61a is formed in the fin 60a, extending vertically from the outer side of the rod body 50a in the width direction. Fabric 7 is placed on the fin 60a, and in this state, a sewing thread passes through the through hole 61a onto the fabric 7, thereby sewing the fabric 7 onto the fin 60a.

[0080] In the tooth row 80A of the insert rod 5a, four teeth 81a to 84a extend from the front and rear of the rod body 50a at intervals. Among the four teeth 81a to 84a, the amount of protrusion (maximum value) relative to the core wire member 3 in the width direction decreases as the tooth is further back. Therefore, with respect to the inner end in the width direction, the four teeth 81a to 84a are located on the outer side in the width direction in sequence from the foremost tooth 81a to the last tooth 84a. Furthermore, the core wire member 3 serves as the reference for measuring the amount of protrusion. Figure 9 The inner end of the core wire member 3 in the width direction is shown by a dashed line. Additionally, Figure 9 The protrusion of the four teeth 81a to 84a is shown as a1 to a4.

[0081] The three teeth 82a to 84a on the rear side of the insert 5a extend inward from the upper part of the inner side surface of the rod body 50a in the width direction. In other words, the protruding parts of the second to the third teeth 82a to 84a from the front side are all on the upper part of the inner side surface of the rod body 50a in the width direction. In addition, the inner side surface of the three teeth 82a to 84a in the width direction is parallel to the front-back direction. The second tooth 82a and the third tooth 83a from the front side are trapezoidal in shape with front-back symmetry. Figure 9In the diagram, at the position of the last tooth 84a, a simulated tooth 84f, depicting the shape of the preceding tooth 83a (the third tooth 83a from the front), is shown with a dashed line and configured as an assumption. The rear surface of the last tooth 84a is positioned further forward than the rear surface of the simulated tooth 84f, which engages with the teeth of the conveying gear. As a result, the teeth of the conveying gear do not engage with the rear surface of the last tooth 84a.

[0082] The foremost tooth 81a of the insert 5a extends inward from the top and bottom along the inner side of the insert body 50a in the width direction. The foremost tooth 81a includes an upper tooth portion 811a forming the upper side and a lower tooth portion 815a forming the lower side. In addition, the lower tooth portion 815a includes a first rear tooth portion 816a extending rearward relative to the upper tooth portion 811a and a front side portion 817a forming the front side relative to the first rear tooth portion 816a.

[0083] The first rear tooth portion 816a forms the rear portion of the lower tooth portion 815a, and also forms the rear portion of the foremost tooth 81a. The rear surface 816a1 of the first rear tooth portion 816a is parallel to the left-right direction.

[0084] The front portion 817a forms the front portion of the lower tooth portion 815a. Furthermore, the front portion 817a and the upper tooth portion 811a form the front portion of the foremost tooth 81a. The front portion of the foremost tooth 81a cooperates with the front end of the rod body 50a to form a semi-engaging portion 812a that engages with the engagement portion 45 of the last chain tooth 40 on the side of the seat rod. Specifically, the front end of the rod body 50a forming the semi-engaging portion 812a is the front end of the rod body 5a and is the inner portion relative to the width direction of the core wire member 3.

[0085] Viewed from above, the upper part of the semi-engaging portion 812a has the same shape as the front part of the engaging portion 45 when the chain tooth 40 is bisected. That is, the upper part of the semi-engaging portion 812a is a right-angled triangle. The front surface 813a of the upper part of the semi-engaging portion 812a is inclined relative to the left-right direction, facing rearward as it moves inward in the width direction. The rear surface 814a of the upper part of the semi-engaging portion 812a is parallel to the left-right direction. Furthermore, the first rear tooth portion 816a extends rearward from the rear surface of the lower part of the semi-engaging portion 812a.

[0086] The lower part of the semi-engaging portion 812a includes: a semi-neck 818a, which forms an outer portion in the width direction and accommodates the rear portion of the head 45e of the last chain tooth 40 on the bar side; and a semi-head 819a, which forms an inner portion in the width direction and accommodates the rear portion of the neck 45d of the last chain tooth 40 on the bar side. When viewed from above, the semi-neck 818a is hidden in the upper part of the semi-engaging portion 812a and cannot be seen visually. The front surface 818a1 of the semi-neck 818a is semi-circularly recessed towards the rear. The semi-neck 818a has a shape corresponding to the front portion of the neck 45d of the chain tooth 40 on the bar side. When viewed from below, the front surface 819a1 of the semi-head 819a is semi-circularly expanded towards the front. The semi-head 819a has a shape corresponding to the front portion of the head 45e of the chain tooth 40 on the bar side.

[0087] A tooth guide 56a is located on the outer side of the tooth row 80A in the width direction. The tooth guide 56a comprises a front guide portion 56a1, a middle guide portion 56a2, and a rear guide portion 56a3, sequentially arranged rearwards relative to the foremost tooth 81a. Regarding depth in the width direction, the front guide portion 56a1 and the rear guide portion 56a3 are deeper than the middle guide portion 56a2. Incidentally, the groove depth is the dimension in the width direction relative to a line parallel to the front-rear direction.

[0088] A front guide portion 56a1 is formed within a range extending rearward from the foremost tooth 81a to the middle portion in the front-rear direction of the second tooth 82a from the front side. The front surface of the front guide portion 56a1 is parallel to the width direction in a continuous state with respect to the rear surface 816a1 of the first rear tooth portion 816a. The rear surface of the front guide portion 56a1 is inclined relative to the width direction, facing rearward as it moves inward in the width direction.

[0089] The middle guide portion 56a2 is formed extending rearward from the rear side of the front guide portion 56a1 until it reaches the area between the third tooth 83a and the last tooth 84a from the front side. The inner surface of the middle guide portion 56a2 in the width direction is parallel to the front-rear direction.

[0090] The rear guide portion 56a3 is formed in the range from the rear side of the middle guide portion 56a2 to the rear end of the rod body 50a. The inner surface of the rear guide portion 56a3 in the width direction is inclined relative to the width direction with its front part facing outward in the width direction as it moves rearward, and its rear part is parallel to the front-rear direction.

[0091] like Figures 6-8 As shown in Figures 11 and 12, the base rod 5b has a similar shape to the insert rod 5a after being reversed left and right. For the base rod 5b, the parts that have the same function as the insert rod 5a will be briefly described, using the same terminology as the insert rod 5a, while different symbols will be used.

[0092] The base rod 5b, like the insert rod 5a, includes a rod body 50b, fins 60b, and a tooth row 80B containing multiple teeth 81b to 83b. In addition, the base rod 5b also includes a protrusion 90 protruding from the lower surface of the rod body 50b.

[0093] The main body 50b of the base rod 5b also extends in the front-rear direction. The core wire member 3 penetrates the front surface 51b and the rear surface 52b of the main body 50b. In this case, the core wire member 3 is parallel to the front-rear direction. Furthermore, when the core wire member 3 is parallel to the front-rear direction, the main body 50b is also parallel to the front-rear direction. The upper surface 53b and lower surface 54b of the main body 50b are formed as planes orthogonal to the vertical direction. On the outer side of the main body 50b in the width direction, an inwardly recessed portion 55b is formed in the middle of the front-rear direction.

[0094] The fins 60b of the base rod 5b are located above the lower surface 54b of the rod body 50b and below the upper surface 53b of the rod body 50b. A through hole 61b is also formed in the fins 60b.

[0095] In the tooth row 80B of the base rod 5b, three teeth 81b to 83b extend from the front and rear of the rod body 50b at intervals. Among the three teeth 81b to 83b, the amount of protrusion (maximum value) relative to the core wire member 3 in the width direction is smaller towards the rearmost tooth. Therefore, with respect to the inner end in the width direction, the three teeth 81b to 83b are located on the outer side in the width direction in sequence from the foremost tooth 81b to the last tooth 83b. Figure 11 The inner end of the core wire member 3 in the width direction is shown by a dashed line, and the protrusion of the three teeth 81b to 83b is shown as b1 to b3.

[0096] The two rear teeth 82b and 83b of the base rod 5b extend inward from the lower part of the inner side of the rod body 50b in the width direction. In other words, the protruding parts of the second and subsequent teeth 82b and 83b of the base rod 5b from the front are all on the lower part of the inner side of the rod body 50b in the width direction. In addition, the inner side of the two rear teeth 82b and 83b in the width direction is parallel to the front-back direction. The two rear teeth 82b and 83b are trapezoidal in shape with front-back symmetry. The front and rear surfaces of the last tooth 83b engage with the teeth of the conveying gear.

[0097] The foremost tooth 81b of the base bar 5b extends inward in the width direction from the upper and lower parts of the bar body 50b. The foremost tooth 81b includes an upper tooth portion 811b forming the upper side and a lower tooth portion 815b forming the lower side.

[0098] The front surface 811b1 of the upper tooth portion 811b is parallel to the left-right direction. The rear surface 811b2 of the upper tooth portion 811b is inclined relative to the width direction, facing forward as it moves inward toward the width direction. The rear portion 812b of the upper tooth portion 811b engages with the portion 816b located in the front and inward of the width direction of the lower tooth portion 815b in the vertical direction. That is, the rear portion 812b of the upper tooth portion 811b is the engagement portion 812b (the upper engagement portion), and the portion 816b located in the front and inward of the width direction of the lower tooth portion 815b is another engagement portion 816b (the lower engagement portion).

[0099] The front portion 813b of the upper tooth portion 811b is a front tooth portion 813b that extends forward relative to the lower tooth portion 815b and the engagement portion 812b. That is, the upper tooth portion 811b includes the engagement portion 812b and the front tooth portion 813b.

[0100] The front surface 815b1 of the lower tooth portion 815b is parallel to the width direction. The rear surface 815b2 of the lower tooth portion 815b is inclined relative to the width direction, facing forward as it moves inward toward the width direction. The lower tooth portion 815b includes: an engagement portion 816b; a second rear tooth portion 817b extending rearward relative to the upper tooth portion 811b and the engagement portion 816b; and an inner tooth portion 818b extending inward in the width direction relative to the engagement portion 816b and the second rear tooth portion 817b.

[0101] The second rear tooth 817b overlaps with the second tooth of the insert rod 5a from the front side. The part of the second rear tooth 817b that extends out and the parts of the second and subsequent teeth 82b and 83b of the base rod 5b that extend out from the front side are both on the lower part of the inner side surface of the rod body 50b in the width direction.

[0102] like Figure 8 As shown, the internal tooth portion 818b is housed in the front guide portion 56a1 on the lower surface of the rod body 50a of the insert rod 5a. Furthermore, in this state, the second tooth 82b from the front faces the middle guide portion 56a2, and the last tooth 83b faces the rear guide portion 56a3.

[0103] In the case of chain component 1, or when the zipper is closed, such as Figure 8As shown, the insert rod 5a and the base rod 5b are in the following relationship: The teeth 81a to 84a of the insert rod 5a and the teeth 81b to 83b of the base rod 5b overlap vertically in a manner that allows them to move parallel to each other in the width direction. In this case, the teeth 81a to 84a of the insert rod 5a and the teeth 81b to 83b of the base rod 5b overlap vertically in a portion. More specifically, the teeth 81a to 84a of the insert rod 5a and the teeth 81b to 83b of the base rod 5b overlap vertically in a state where they are offset by a distance P in the front-to-back direction. The distance P is the distance between the same positions of the meshing portions 45 of the adjacent chain teeth 40 (refer to...). Figure 15 Specifically, the foremost tooth 81a of the insert 5a overlaps with the foremost tooth 81b of the base 5b at the first rear tooth portion 816a and the front tooth portion 813b. Furthermore, the two rear teeth 82b and 83b of the base 5b overlap with two of the three rear teeth 82a to 84a of the insert 5a, respectively. Additionally, the semi-engaging portion 812a of the insert 5a engages with the engaging portion 45 of the last chain tooth 40 on the base 5b side. And, as... Figure 1 As shown, when viewed from above, the front surface 813a (front surface of the upper tooth 811a) of the upper part of the semi-engaging portion 812a of the insert bar 5a is inclined relative to the width direction in a state that faces rearward as it moves inward toward the width direction, and is parallel to and facing the rear surface 45b of the upper part of the engagement portion 45 in the last chain tooth 40 on the side of the seat bar 5b.

[0104] Additionally, when viewed from above, as Figure 6 As shown, the rear surface 814a (rear surface of the upper tooth portion 811a) of the upper part of the semi-engaging portion 812a of the insert rod 5a faces the front surface 813b1 (front surface of the upper tooth portion 811b) of the front tooth portion 813b of the seat rod 5b in a state parallel to the width direction. Furthermore, when viewed from below, as... Figure 8 As shown, the rear surface 816a1 of the first rear tooth portion 816a of the insert rod 5a and the front surface of the front guide portion 56a1 are continuous in the width direction and parallel to each other, and face each other parallel to the front surface 815b1 of the lower tooth portion 815b of the seat rod 5b.

[0105] The protrusion 90 protrudes from the lower surface 54b of the rod body 50b, further rearward than the fin 60b. The protrusion 90 is used to abut against the rear pull head 8B.

[0106] like Figure 4As shown, a stop groove 27 is formed inside the rear pull head 8B. The stop groove 27 guides the protrusion 90 in a manner that allows it to move in the forward and backward direction, and stops the protrusion 90. Specifically, the stop groove 27 is formed on the rear part of the upper surface of the lower wing plate 23. In the figure, stop grooves 27 are formed on both the left and right sides of the upper surface of the lower wing plate 23. In this embodiment, the right-side stop groove 27 is associated with the protrusion 90, while the left-side stop groove 27, although symmetrical to the right-side stop groove 27, is unrelated to the protrusion 90. The right-side stop groove 27 will be described later. The stop groove 27 guides the protrusion 90 in a manner that allows it to move forward and backward, and stops the forward movement of the protrusion 90.

[0107] The stop groove 27 extends forward from the rear end of the lower wing plate 23. The front surface 28 of the stop groove 27 is located at its front end. The protrusion 90 abuts against the front surface 28 of the stop groove 27. When the rear zipper pull 8B moves rearward relative to a pair of zipper teeth, and the front surface of the stop groove 27 abuts against the protrusion 90, as... Figure 3 As shown, the rear pull head 8B is located at the extreme position of the rear end within the range of motion, and the rod body 50b of the seat bar 5b is housed inside the pair of pull heads 8A and 8B. The rod body 50a of the insert bar 5a can be pulled out / inserted relative to the pair of pull heads 8A and 8B.

[0108] Figure 13 (A) shows the rear slider 8B in its extreme rear position. If the rear slider 8B is moved forward from this position, then as shown in Figure 8B... Figure 13 As shown in (B), at the front of the rear pull head 8B, the rod body 50a of the insert rod 5a and the rod body 50b of the seat rod 5b are prevented from moving outward in the width direction by the parallel plate portions 26a of the left and right flanges 26. Simultaneously, at the rear of the rear pull head 8B, the rod body 50a of the insert rod 5a and the rod body 50b of the seat rod 5b are squeezed outward in the width direction by the connecting post 24 of the rear pull head 8B, and tilted relative to the front-back direction. If the rear pull head 8B is further moved forward, then as... Figure 13 As shown in (C), the last tooth 84a of the insert rod 5a and the last tooth 83b of the seat rod 5b touch the connecting post 24 of the pull head 8B on the rear side, while the rod body 50a of the insert rod 5a and the rod body 50b of the seat rod 5b are squeezed outward in the width direction.

[0109] As the rear pull head 8B moves forward, as... Figure 13As shown in (D), a pair of rod bodies 50a and 50b detach from the left and right parallel plates 26a, making it easier for the rear of the pair of rod bodies 50a and 50b to extend in the width direction. The teeth in the tooth rows 80A and 80B that contact the connecting post 24 become forward teeth. In the zipper of this embodiment, regarding the tooth rows 80A and 80B, the amount of protrusion inward in the width direction relative to the core wire member 3 is smaller towards the rear teeth. Therefore, whenever a tooth that contacts the connecting post 24 becomes a forward tooth, the amount of movement of the insert rod 5a and the seat rod 5b outward in the width direction gradually increases. As a result, between the pair of inclined plates 26b in the rear zipper pull 8B, the pair of rod bodies 50a and 50b gradually tilt relative to the front-rear direction, improving the operability of the rear zipper pull 8B.

[0110] Additionally, when inserting the plunger 5a into a pair of pull heads 8A and 8B, during the initial insertion phase, as... Figure 3 , Figure 14 As shown in (A), when the rear part of the rod body 50a of the inner insert rod 5a of the pair of sliders 8A and 8B faces the front part of the rod body 50b of the seat rod 5b in the width direction, the insert rod 5a is most inclined relative to the front-rear direction. At this stage, the last tooth 84a of the insert rod 5a is in a state where it is easiest to contact the connecting post 24 of the front slider 8A. However, since the last tooth 84a of the insert rod 5a has the smallest protrusion among the teeth of the insert rod 5a, it is not easy to contact the connecting post 24, and it becomes easier to insert the rod body 50a of the insert rod 5a.

[0111] Additionally, with the insertion of the plug 5a, such as Figure 14 As shown in (B) and (C), while the inclination of the insert 5a relative to the front-back direction decreases, the teeth 81a to 83a, which are further forward than the last tooth of the insert 5a, approach the base bar 5b in sequence. Since the protrusion of the teeth gradually increases towards the front, it becomes easier to insert the insert 5a. Furthermore, since a toothed guide 56a is formed on the main body 50a of the insert 5a, the teeth 81b to 83b of the base bar 5b are guided by the toothed guide 56a, making it less likely for them to come into contact with the main body 50a of the insert 5a, thus making it easier to insert the insert 5a. Moreover, at the moment when the insertion of the insert 5a is completed, the amount of overlap in the width direction of the teeth on the front side of the insert 5a and the base bar 5b in the vertical direction is greater, and the pair of main bodies 50a and 50b are stable inside the pair of pull heads 8A and 8B. In addition, when the insert 5a is pulled out relative to the pair of pull heads 8A and 8B, it becomes easier to pull it out by using the opposite method as when it was inserted.

[0112] Furthermore, since the rear surface of the last tooth 84a of the insert 5a is located further forward than the rear surface of the simulated tooth 84f, the last tooth 84a is less likely to hit the connecting post 24 of the rear pull head 8B when operating the rear pull head 8B. As a result, the operability of the rear pull head 8B is improved.

[0113] Furthermore, in the zipper of the first embodiment, when the rear zipper head 8B is located at the extreme position of the rear end within the range of movement, the teeth 81a to 84a of the insert bar 5a and the teeth 81b to 83b of the base bar 5b are arranged in a vertically overlapping structure in a state that allows them to move parallel to the outside in the width direction. Therefore, even if the rear zipper head 8B is moved forward, the portion other than the overlapping surface of the teeth 81a to 84a of the insert bar 5a and the teeth 81b to 83b of the base bar 5b is not easily damaged.

[0114] Furthermore, in the zipper of the first embodiment, the front part of the foremost tooth 81a of the insert 5a cooperates with the front end of the main body 50a of the insert 5a to form a semi-engaging part 812a. Therefore, the semi-engaging part 812a engages with the last chain tooth 40 of the seat bar 5b, thereby improving the integrity of the chain tooth row 4 on the seat bar side and its integration with the seat bar 5b. Based on this, the rear part of the foremost tooth 81a of the insert 5a is a first rear tooth 816a. The first rear tooth 816a extends rearward from the lower part of the rear surface of the semi-engaging part 812a. The first rear tooth 816a overlaps with the foremost tooth 81b of the seat bar 5b in a state that allows it to move parallel to the outside in the width direction, thus maintaining the operability of the rear zipper pull 8B.

[0115] Furthermore, in the zipper of the first embodiment, by making the rear surface 814a of the upper part of the semi-engaging portion 812a and the rear surface 816a1 of the first rear tooth portion 816a parallel to the width direction, the foremost tooth 81a of the insert rod 5a overlaps with the foremost tooth 81b of the seat rod 5b in a state that allows it to move parallel to the outside in the width direction, thus maintaining the operability of the rear zipper pull 8B. Moreover, the foremost tooth 81b of the seat rod 5b includes a front tooth portion 813b on the upper side and a second rear tooth portion 817b on the lower side. Therefore, the front tooth portion 813b overlaps with the first rear tooth portion 816a of the insert rod 5a from the upper side, and the second rear tooth portion 817b overlaps with the second tooth 82a of the insert rod 5a from the lower side. Thus, the foremost tooth 81b of the seat rod 5b overlaps with the tooth row 80A of the insert rod 5a from both the top and bottom, improving the integration of the insert rod 5a and the seat rod 5b.

[0116] Furthermore, in the zipper of the first embodiment, regarding the base bar 5b, the second and subsequent teeth 82b and 83b from the front extend from the lower part, which is the same part as the second rear tooth portion 817b in the upper and lower parts of the bar body 50b. The second and subsequent teeth 82a to 84a of the insert bar 5a from the front extend from the upper part, which is the same part in the upper and lower parts of the bar body 50a. Therefore, the second and subsequent teeth 82a to 84a of the insert bar 5a and the second and subsequent teeth 82b and 83b of the base bar 5b are likely to overlap.

[0117] Furthermore, when the chain tooth components 2a and 2b are being conveyed for sewing the fabric 7, such as Figure 15 , 16 As shown, multiple conveying gears G mesh inside the width direction of the chain tooth members 2a and 2b, and the lower parts of the chain tooth members 2a and 2b are guided parallel to the front-back direction. Specifically, in the chain tooth row 4, teeth G1 of the conveying gear G mesh between adjacent chain teeth 40; in the insert bar 5a and seat bar 5b, teeth G1 of the conveying gear G mesh between adjacent teeth 81a-84a and 81b-83b; and in the guide section 6a and guide section 6b, teeth G1 of the conveying gear G mesh between adjacent guide chain teeth 16a and 16b. Furthermore, although not specifically illustrated, guide grooves are formed in a straight line on the needle plate of the sewing machine for the lower parts of the guide chain tooth members 2a and 2b. In the insert bar 5a, the portion lower than the fin 60a is guided by the guide grooves. In the base rod 5b, the portion lower than the fin 60b is also guided by the guide groove. The width of the guide groove is slightly greater than the maximum width 4W of the lower part of the chain tooth row 4. The maximum width 5aW of the rod body 50a of the insert rod 5a combined with the teeth 81a to 84a is less than or equal to the maximum width 4W of the chain tooth row 4. The maximum width 5bW of the rod body 50b of the base rod 5b combined with the teeth 81b to 83b is also less than or equal to the maximum width 4W of the chain tooth row 4. The maximum width 6aW of the lower part of the guide portion 6a on the insert rod side is the same as the maximum width 6bW of the lower part of the guide portion 6b on the base rod 5b side and the maximum width 4W of the chain tooth row 4.

[0118] As previously mentioned, the zipper chain is produced by cutting the original long strips of chain tooth components 2a and 2b. Furthermore, chain tooth components 2a and 2b are components formed by repeatedly fixing the chain tooth row 4, bar components 5a and 5b, guide portions 6a and 6b in sequence relative to the long strip of core wire component 3, facing backwards. To make the separated pair of chain tooth components 2a and 2b become chain component 1, as follows... Figure 17As shown, it is passed through the assembly pull head 8C. When it passes through the assembly pull head 8C, a pair of chain teeth 4 engage in a facing position in the width direction, the teeth 80A of the insert bar 5a and the teeth 80B of the seat bar 5b overlap vertically, and a pair of guide parts 6a and 6b engage in a facing position in the width direction, forming the chain member 1. The assembly pull head 8C has the same structure as the front pull head 8A.

[0119] In existing chain components, the leading tooth of the insert bar 5a engages with the leading tooth of the seat bar 5b in a manner that prevents them from moving outward in the width direction, similar to a pair of chain teeth. This structure improves the integration of the insert bar 5a and the seat bar 5b. On the other hand, when a pair of chain tooth components 2a and 2b are passed through the assembly pull head 8C, they abut roughly parallel to each other in the width direction before the leading tooth of the insert bar 5a engages with the leading tooth of the seat bar 5b, making engagement difficult and prone to damage.

[0120] Furthermore, existing chain components are not simply composed of a pair of chain tooth components 2a and 2b forming a pair of zipper tooth chain straps. Instead, they are envisioned as a pair of zipper tooth chain straps in which a separately manufactured base body is fixed to the main body of the base bar, and the base bar is pulled out / inserted relative to the base body. That is, existing chain components are envisioned as including an insert bar, a base bar, and an opening mechanism for the base body.

[0121] In the case of the reverse opening component, the lengths of the insert bar body and the seat bar body in the front-to-back direction are longer compared to the open component. Therefore, as with existing chain components, if the reverse opening component also employs a structure in which the frontmost tooth of the insert bar and the frontmost tooth of the seat bar cannot move outward in the width direction, when a pair of chain tooth components 2a and 2b are passed through the assembly pull head 8C, they are prone to collision before the frontmost tooth of the insert bar and the frontmost tooth of the seat bar engage, making engagement more difficult and more susceptible to damage.

[0122] The chain member 1 of the described embodiment solves this problem. In summary, it is as follows: In the chain member 1, a pair of chain tooth members 2a and 2b extending in the front-back direction engage facing each other in the width direction, which is the left-right direction. Furthermore, one chain tooth member 2a includes: a core wire member 3 extending in the front-back direction; a chain tooth row 4 sequentially fixed rearward relative to the core wire member 3; a insert bar 5a as one of the bar members; and a guide portion 6a. The other chain tooth member 2b includes: another core wire member 3 extending in the front-back direction; another chain tooth row 4 sequentially fixed rearward relative to the other core wire member 3; a seat bar 5b as another bar member; and another guide portion 6b.

[0123] The inner portion of the chain tooth 4 in the width direction cannot engage with the inner portion of the opposing chain tooth 4 in the width direction in a manner that allows it to move parallel to the outer portion in the width direction. However, when the fabric 7 is sewn along the chain tooth 4, it can engage with the conveying gear G used to convey the chain tooth 4. The inner portions of the guide portions 6a and 6b in the width direction cannot engage with the inner portions of the opposing guide portions 6a and 6b in a manner that allows them to move parallel to the outer portion in the width direction, or they can overlap and engage with the conveying gear G. The rod components 5a and 5b include: rod bodies 50a and 50b, fixed to the core wire component 3 and capable of passing through the assembly pull head 8C; fins 60a and 60b, extending outward in the width direction from the rod bodies 50a and 50b and carrying the fabric 7; and tooth rows 80A and 80B, each containing three or more teeth 81a-84a and 81b-83b extending inward in the width direction from the rod bodies 50a and 50b with a back-to-back gap. Furthermore, the insert rod 5a and the seat rod 5b overlap vertically at the teeth 81a-84a and 81b-83b of a pair of tooth rows 80A and 80B, in a manner that allows parallel movement outward in the width direction, and are capable of meshing with the conveying gear G. The above description constitutes the features of the chain component 1 of the described embodiment. Ideally, the inner sides of the guide portions 6a and 6b in the width direction are engaged with each other in a manner that prevents them from moving parallel to the outer side in the width direction.

[0124] When a pair of chain tooth components 2a and 2b in a separated state are passed through the interior of the assembly pull head 8C to produce the chain component 1, a pair of bar bodies 50a and 50b are guided by the left and right flanges 26 and enter the interior of the assembly pull head 8C at a significantly inclined position relative to the front-back direction. As they enter, the inclination of the pair of bar bodies 50a and 50b gradually decreases. Furthermore, after the foremost tooth 81a of the insert bar 5a and the foremost tooth 81b of the seat bar 5b have just passed the connecting post 24 of the assembly pull head 8C, the pair of bar bodies 50a and 50b are guided by the left and right parallel plates 26a and become almost parallel to the front-back direction. In this embodiment, the insert bar 5a and the base bar 5b are configured to overlap vertically in a manner that allows them to move parallel to each other in the width direction at their inner sides. Therefore, after the first tooth 81a of the insert bar 5a and the first tooth 81b of the base bar 5b have just passed the connecting post 24 of the assembly pull head 8C, they gradually move inward in the width direction, thus overlapping vertically. As a result, a pair of chain tooth members 2a and 2b can easily pass through the assembly pull head 8C, the chain member 1 can be easily assembled, and a pair of tooth rows 80A and 80B are less likely to be damaged.

[0125] This invention is not limited to the described embodiments, and appropriate modifications can be made without departing from its spirit.

[0126] Explanation of icon numbers

[0127] 1: Chain components

[0128] 2a, 2b: Chain tooth components

[0129] 3: Core wire components

[0130] 4: Chain teeth

[0131] 4W: Maximum width

[0132] 5a: Insert rod

[0133] 5aW: Maximum width

[0134] 5b: Seat stick

[0135] 5bW: Maximum width

[0136] 6a, 6b: Guiding section

[0137] 6aW, 6bW: Maximum width

[0138] 7: Fabric

[0139] 8A, 8B, 8C: Pull tabs

[0140] 10: Reverse-opening parts

[0141] 16a, 16b: Guide teeth

[0142] 16a1, 16b1: Guiding the trunk

[0143] 16a2, 16b2: Guide meshing parts

[0144] 21: Pull-out body

[0145] 21a: Chain tooth path

[0146] 21b: Fabric trough

[0147] 22: Upper Wing

[0148] 23: Lower wing plate

[0149] 24: Connecting Post

[0150] 25: Tape Installation Section

[0151] 26: Flange

[0152] 26a: Parallel section

[0153] 26b: Inclined plate

[0154] 27: Stop slot

[0155] 28: Front surface

[0156] 29: Film Analysis

[0157] 40: Chain teeth

[0158] 41: Torso

[0159] 41a: Front surface

[0160] 41b: Back surface

[0161] 41c: Upper surface

[0162] 41d: Lower surface

[0163] 41e: Side view

[0164] 45: Engaging part

[0165] 45a: Front surface

[0166] 45b: Back surface

[0167] 45d: Neck

[0168] 45d1: Front surface

[0169] 45d2: Back surface

[0170] 45e: Head

[0171] 45e1: Front surface

[0172] 45e2: Back surface

[0173] 50a, 50b: Rod body

[0174] 51a, 51b: Front surface

[0175] 52a, 52b: Rear surface

[0176] 53a, 53b: Upper surface

[0177] 54a, 54b: Lower surface

[0178] 55a, 55b: inward concavity

[0179] 56a: Toothed guide

[0180] 56a1: Front guidance section

[0181] 56a2: Central Guidance Section

[0182] 56a3: Rear Guide Section

[0183] 60a, 60b: Fins

[0184] 61a, 61b: Through holes

[0185] 80A, 80B: Tooth row

[0186] 81a, 82a, 83a, 84a, 84f, 81b, 82b, 83b: teeth

[0187] 811a, 811b: Upper teeth

[0188] 811b1: Front surface

[0189] 811b2: Back surface

[0190] 812a: Semi-engaging part

[0191] 812b: Joint (rear part)

[0192] 813a: Front surface

[0193] 813b: Anterior teeth

[0194] 813b1: Front surface

[0195] 814a: Back surface

[0196] 815a, 815b: Lower teeth

[0197] 815b1: Front surface

[0198] 815b2: Back surface

[0199] 816a: First posterior tooth

[0200] 816a1: Back surface

[0201] 816b: Location, Joint

[0202] 817a: Front side

[0203] 817b: Second posterior tooth

[0204] 818a: Half-neck

[0205] 818a1: Front surface

[0206] 818b: Internal teeth

[0207] 819a: Half-head

[0208] 819a1: Front surface

[0209] 90: convex part

[0210] G: Gear for conveying

[0211] G1: Teeth

[0212] P: Spacing

Claims

1. A zipper, comprising: A pair of chain teeth (4) is formed by arranging multiple chain teeth (40) in one row in the front-to-back direction in two rows in the width direction; a pair of core wire members (3) are fixed to the pair of chain teeth (4) respectively in the state of passing through the chain teeth (40); a reverse opening member (10) includes a pair of bar members (5a, 5b) fixed to the pair of core wire members (3) respectively on the rear side relative to the pair of chain teeth (4); and a pair of zipper pulls (8A, 8B) are a pair of zipper pulls (8A, 8B) whose directions of opening / closing the pair of chain teeth (4) are opposite, and each includes an upper wing plate (22) and a lower wing plate (23) facing each other in the vertical direction and a connecting post (24) connecting the upper wing plate (22) and the lower wing plate (23). In the zipper, With fabric (7) respectively mounted on the insert (5a) as one of the rod components and the base (5b) as the other rod component, and with a pair of zipper pulls (8A, 8B) accommodating the insert (5a) and the base (5b), the insert (5a) can be pulled out relative to the pair of zipper pulls (8A, 8B). The zipper is characterized in that... The rod components (5a, 5b) include: a rod body (50a, 50b) fixed to the rear end of the core wire component (3) and capable of being housed in the pull head (8); fins (60a, 60b) extending outward in the width direction from the rod body (50a, 50b) and carrying the fabric (7); and a tooth row (80A, 80B) comprising three or more teeth (81a to 84a, 81b to 83b) extending inward in the width direction from the rod body (50a, 50b) and spaced apart front to back. The inner portion of the chain teeth (4) in the width direction engages with the inner portion of the opposite chain teeth (4) in the width direction, and when the fabric (7) is sewn along the chain teeth (4), it engages with the conveying gear (G) for conveying the chain teeth (4). The teeth (81a-84a, 81b-83b) overlap vertically at least partially with respect to the teeth (81a-84a, 81b-83b) of the opposing rod members (5a, 5b), and mesh with the conveying gear (G). In the tooth rows (80A, 80B), the amount of protrusion inward relative to the core wire member (3) in the width direction is smaller for the teeth located further back.

2. The zipper according to claim 1, characterized in that, In the insert (5a), assuming that a simulated tooth (84f) simulating the shape of the preceding tooth (83a) is configured at the position of the last tooth (84a), the rear surface of the last tooth (84a) is located further forward than the rear surface of the simulated tooth (84f).

3. The zipper according to claim 1 or 2, characterized in that, The teeth (81a-84a) of the insert (5a) and the teeth (81b-83b) of the base (5b) overlap vertically in at least a portion of their length in such a way that they can move parallel to each other outward in the width direction.

4. The zipper according to claim 3, characterized in that, The front part of the foremost tooth (81a) of the insert (5a) cooperates with the front end of the rod body (50a) of the insert (5a) to form a semi-engaging part (812a) that engages with the last chain tooth (40) on the side of the seat rod. The rear part of the foremost tooth (81a) of the insert (5a) is a first rear tooth (816a), which extends rearward from the rear surface of either the upper or lower part of the semi-engaging part (812a) and overlaps in the vertical direction with respect to the foremost tooth (81b) on the side of the seat bar.

5. The zipper according to claim 4, characterized in that, The foremost tooth (81a) of the insert (5a) causes the rear surface (814a) of the other of the upper and lower portions of the semi-engaging portion (812a) to be parallel to the rear surface of the first rear tooth portion (816a) and the width direction, or to be inclined relative to the width direction in a state that faces forward as it moves inward toward the width direction. The foremost tooth (81b) of the seat bar (5b) includes: an upper tooth (811b) extending from the upper part of the side surface inside the width direction of the bar body (50b) of the seat bar (5b); and a lower tooth (815b) extending from the lower part of the side surface. One of the upper tooth portion (811b) and the lower tooth portion (815b) includes a front tooth portion (813b), which extends forward relative to the other of the upper tooth portion (811b) and the lower tooth portion (815b) and overlaps with the first rear tooth portion (816a). The other of the upper tooth (811b) and the lower tooth (815b) includes a second rear tooth (817b) that extends rearward relative to one of the upper tooth (811b) and the lower tooth (815b) and overlaps with the second tooth (82a) of the insert (5a) from the front.

6. The zipper according to claim 5, characterized in that, The second and subsequent teeth (82b, 83b) of the seat bar (5b) extend from the front side from the portion of the upper and lower parts of the side where the second rear tooth (817b) belongs.

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