Pull head

Abstract

The present invention provides a zipper pull. The zipper pull (1) of the present invention has a zipper pull body (10) having an upper wing plate (20) and a lower wing plate (30). A pair of groove portions (50, 60) are provided on the inner surface of the upper wing plate (20) and / or the lower wing plate (30). In a cross-sectional view of the zipper pull body (10), with the outermost position in the zipper pull width direction of the outer periphery of the connecting post (40) defined as the outermost position (41), the inner groove side edge portion (52a) of each groove portion (50, 60) is positioned inside the zipper pull width direction than the outermost position (41), and the outer groove side edge portion (52b) of each groove portion (50, 60) is positioned outside the zipper pull width direction than the outermost position (41). Therefore, even with repeated sliding operations, it is not easy to cause scraping of the zipper teeth caused by the inner surface of the zipper pull body (10).

Description

Technical Field

[0001] This invention relates to a zipper pull for zippers. Background Technology

[0002] As one type of zipper, for example, there is a zipper with multiple zipper teeth made of metal, as described in International Patent Publication No. 2009 / 128136 (Patent Document 1). Such zippers are sometimes referred to as metal zippers.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: International Publication No. 2009 / 128136 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] In traditional metal zippers, the zipper head typically rubs against the metal zipper teeth as it slides. For example, when the zipper head is pulled along the zipper tape while sliding, the zipper head and zipper teeth are prone to strong friction.

[0008] Therefore, due to the repeated sliding operation of the zipper pull, the outer surface of the metal zipper teeth is sometimes locally scraped, exposing the inner metal portion of the zipper teeth. As a result, a difference in color and texture (the feel of metal) occurs between the part of the zipper teeth that was originally formed and the inner part that was exposed by the scraping, sometimes deteriorating the appearance of the zipper teeth and reducing the overall aesthetic quality of the metal zipper.

[0009] The present invention was made in view of the above-mentioned problems, and its object is to provide a zipper pull that is not prone to scratching of the zipper teeth due to the zipper pull body even when repeatedly sliding.

[0010] Solution for solving the problem

[0011] To achieve the above objectives, the zipper pull provided by the present invention is a zipper pull with a zipper pull body, the zipper pull body having: an upper wing plate; a lower wing plate disposed separately from the upper wing plate; and a connecting post that connects the front end of the upper wing plate to the front end of the lower wing plate. In the zipper pull, a pair of groove portions disposed separately from each other in the zipper pull width direction are provided on the inner surface of the upper wing plate and / or the inner surface of the lower wing plate. Each groove portion has an inner groove side edge portion disposed on the inner side in the zipper pull width direction and an outer groove side edge portion disposed on the outer side in the zipper pull width direction. When observing a cross section of the zipper pull body orthogonal to the zipper pull height direction, if the outermost position in the zipper pull width direction of the outer periphery of the connecting post is defined as the outermost position, the inner groove side edge portion of each groove portion is disposed on the inner side in the zipper pull width direction than the outermost position, and the outer groove side edge portion of each groove portion is disposed on the outer side in the zipper pull width direction than the outermost position.

[0012] In the zipper pull of the present invention, preferably, the pair of grooves are provided on the inner surface of the upper wing plate and the pair of grooves are provided on the inner surface of the lower wing plate.

[0013] In addition, preferably, each groove is arranged in a straight line along the length of the pull head.

[0014] In this case, preferably, the zipper body has: a pair of upper flange portions extending from the side edge of the upper wing plate toward the lower wing plate; and a pair of lower flange portions extending from the side edge of the lower wing plate toward the upper wing plate, wherein each groove portion is arranged to be separate from the upper flange portion or the lower flange portion on the inner side of the upper flange portion or the lower flange portion in the zipper width direction.

[0015] In this invention, preferably, the inner surface of the upper wing plate and / or the inner surface of the lower wing plate includes the parting line of the mold used to form the pull head body, and at least a portion of the parting line is contained within each of the groove portions.

[0016] In this case, preferably, the zipper pull body has: a pair of upper flanges extending from the side edge of the upper wing plate toward the lower wing plate; a pair of lower flanges extending from the side edge of the lower wing plate toward the upper wing plate; a pair of shoulder openings opening on both sides of the connecting post; and a rear opening opening at the rear end of the zipper pull body. The parting line has: a first parting line extending from the connecting post on one side in the width direction of the zipper pull; and a second parting line extending from the connecting post on the other side in the width direction of the zipper pull. The first parting line and the second parting line each have: a first horizontal line extending from the connecting post toward the shoulder opening; a vertical line extending from the top of the first horizontal line via a bend toward the rear opening; and a second horizontal line extending from the top of the vertical line on the rear opening side via a bend toward the upper flange or the lower flange. Each of the recessed portions includes at least the entire first horizontal line and the entire vertical line.

[0017] The effects of the invention

[0018] According to the present invention, even with repeated sliding operations, the zipper teeth are less likely to be scratched by the inner surface of the zipper head body. Attached Figure Description

[0019] Figure 1 This is a side view of the pull head of an embodiment of the present invention, viewed from the side.

[0020] Figure 2 Looking from the front Figure 1 The front view of the pull head is shown.

[0021] Figure 3 Viewed from below Figure 1 The diagram shows a cross-sectional view of the upper flange of the pull head.

[0022] Figure 4 Viewed from above Figure 1 The diagram shows a cross-sectional view of the lower flange of the pull head.

[0023] Figure 5 It is an illustrative diagram illustrating the finishing processes performed on the main body of the slider.

[0024] Figure 6 This is a schematic diagram showing the state in which the cutter body with the trimming device is inserted into the main body of the slider.

[0025] Explanation of reference numerals in the attached figures

[0026] 1. Slider head; 10. Slider head body; 11. Upper flange; 12. Lower flange; 13. Parallel flange; 14. Bent flange; 15. Boundary position; 17. Slider tab mounting part; 18. Shoulder opening; 19. Rear opening; 20. Upper wing plate; 21. Inner surface of upper wing plate (upper chain tooth guide surface); 22. Outer surface of upper wing plate (upper upper surface of upper wing plate); 23. Outer peripheral surface of upper wing plate; 24. Upper main plane; 24a. Central plane; 24b. Side plane; 25. Upper forward inclined part; 26. Upper reference inclined part; 26a. First upper base 26b, Second upper reference inclined portion; 27, Upper receiving step portion; 27a, Upper step surface; 27b, Upper connecting surface; 28, Upper rear inclined portion; 30, Lower wing plate; 31, Inner surface of lower wing plate (lower chain tooth guide surface); 32, Outer surface of lower wing plate (lower surface of lower wing plate); 33, Outer peripheral surface of lower wing plate; 34, Lower main plane; 34a, Central plane; 34b, Side plane; 35, Lower front inclined portion; 36, Lower reference inclined portion; 36a, First lower reference inclined portion; 36b, Second lower reference inclined portion 37. Inclined section; 37a. Lower receiving step section; 37b. Lower step surface; 38. Lower connecting surface; 40. Lower rear inclined section; 41. Connecting column; 42. Outermost position; 43. Front end of column; 44. Rear end of column; 45. Column side wall; 46. Front increasing section; 50. Rear decreasing section; 51. Upper groove section; 52. Groove bottom; 52. Groove side edge; 52a. Inner groove side edge; 52b. Outer groove side edge; 53. First bottom surface; 54. Second bottom surface; 60. Lower groove section; 61. Groove bottom; 62. Groove side edge ; 62a, inner groove side edge; 62b, outer groove side edge; 63, first bottom surface; 64, second bottom surface; 70, upper parting line; 71, upper first parting line; 72, upper second parting line; 73, upper first horizontal line; 74, upper vertical line; 75, upper second horizontal line; 80, lower parting line; 81, lower first parting line; 82, lower second parting line; 83, lower first horizontal line; 84, lower vertical line; 85, lower second horizontal line; 90, dressing tool; 91, tool body; 92, opening; 93, corner. Detailed Implementation

[0027] The inventors investigated and studied the scraping of zipper teeth due to the sliding of the zipper pull. As a result, they clarified the following: During the forming of the zipper pull body, burrs (residues) protruding from the tooth guide surface of the zipper pull body are formed along the parting line of the mold due to dimensional errors, misalignments, etc. of the mold used for forming. One of the reasons why the zipper teeth are scraped by the zipper pull is that when the zipper pull slides, the zipper teeth moving within the tooth guide path come into contact with the aforementioned burrs.

[0028] Furthermore, the following has also been clarified: due to the unique shape of the zipper pull body, the parting line of the mold is continuously formed from the inner surface of the upper wing plate and the inner surface of the lower wing plate of the zipper pull body to the outer peripheral surface of the connecting post; and due to the position and posture of the zipper teeth as they move within the tooth guide path of the zipper pull body, burrs formed on the parts of the upper and lower wing plates near the connecting post, and burrs formed on the outer peripheral surface of the connecting post, sometimes also come into contact with the zipper teeth.

[0029] Therefore, the inventors conducted further research based on the above content and discovered the following, thus completing the present invention: In order to prevent the zipper teeth from being scratched by the zipper body when the zipper head slides, a groove portion that can accommodate burrs is set at an appropriate position and range on the parting line (segmentation surface) of the mold set on the zipper head body. Moreover, by properly setting the groove portion, when performing finishing processing to remove burrs formed on the outer peripheral surface of the connecting post, it is also possible to prevent the occurrence of adverse conditions such as damage to the upper and lower wing plates as described later.

[0030] The following is a reference to the appendix. Figure 1 The preferred embodiments of the present invention will be described below.

[0031] Figure 1 This is a side view of the pull head of this embodiment, viewed from the side. Figure 2 This is a front view of the pull head of this embodiment. Figure 3 and Figure 4 These are cross-sectional views of the upper and lower wing plates of the pull head in this embodiment.

[0032] In the following descriptions relating to the zipper pull 1 and the zipper, the front-to-back direction refers to the length direction of the zipper pull 1. Additionally, the direction of sliding when the zipper pull 1 slides along the zipper teeth (see reference). Figure 1 In this case, the direction in which the zipper head 1 moves to engage the zipper teeth is set to forward (shoulder side direction), and the direction in which the zipper head 1 moves to disengage the zipper teeth is set to backward (rear side direction).

[0033] The vertical direction is the height direction of the slider 1, for example, the direction orthogonal to the upper wing plate 20 and lower wing plate 30 described later in the slider body 10 (see reference). Figure 1 and Figure 2 In this case, the orientation of the pull tab (not shown) relative to the pull head body 10 of the pull head 1 is set upward, and the orientation of its opposite side is set downward.

[0034] The left and right directions are the width direction of slider 1, and are orthogonal to the length and height directions of slider 1 (see reference). Figure 2The inner side in the left and right direction is the direction facing the center line or center plane in the left and right direction of the slider body 10, and the outer side in the left and right direction is the direction facing away from the center line or center plane.

[0035] The zipper pull 1 of this embodiment is used for a zipper (not shown) having a pair of left and right zipper teeth, wherein the pair of left and right zipper teeth are fitted with a plurality of zipper teeth. In this case, although the illustration is omitted, the zipper has: a pair of left and right zipper teeth; a zipper pull 1, which is fitted to the rows of teeth of the zipper teeth; a first stop member, which is disposed adjacent to the front end of each of the left and right rows of teeth; and a second stop member, which is disposed adjacent to the rear end of each of the left and right rows of teeth.

[0036] Each zipper belt on the left and right sides has a woven, thin strip of zipper tape and multiple metal zipper teeth installed on opposite side edges of the zipper tape. Each zipper tooth has: a tooth head with an engaging protrusion and an engaging recess; and a pair of tooth legs that split from the tooth head and extend in a left-right direction. The multiple zipper teeth installed on the zipper tape continuously form a tooth row along the length of the zipper tape.

[0037] The first stop member and the second stop member are respectively provided adjacent to the front end and the rear end of the chain teeth to prevent the pull head 1 from falling off the chain teeth.

[0038] Furthermore, the zipper tooth strip in this embodiment is not particularly limited as long as the zipper teeth are made of metal. The shape and size of the first stop member and the second stop member are also not limited. The zipper may be formed without at least one of the first stop member and the second stop member, or a zipper may be formed by using an opening insert instead of the second stop member.

[0039] In this embodiment, the zipper pull 1 is installed on the tooth rows of the left and right zipper belts. The zipper pull 1 can slide along the tooth rows in the direction of engaging the zipper teeth (front) and in the direction of disengaging the zipper teeth (rear).

[0040] The slider 1 is formed by two parts: the slider body 10 and the slider tab (not shown). The slider body 10 is manufactured by die casting of metals such as aluminum alloy and zinc alloy. Furthermore, in this invention, the material and manufacturing method of the slider body are not particularly limited.

[0041] The pull tab (not shown) includes, for example, a pull tab body portion that serves as a gripper portion; a pair of left and right arms that extend from one end of the pull tab body portion; and a mounting shaft portion that connects the top ends of the arms. It can use the same pull tabs as those commonly used in the past. Furthermore, in this invention, the pull tab only needs to be formed into a pull tab mounting portion (described later) that can be mounted on the zipper head body; the shape, structure, size, material, etc., of the pull tab are not particularly limited.

[0042] The zipper pull body 10 of this embodiment has a shape that is symmetrical about the center line in the left-right direction of the zipper pull body 10. The zipper pull body 10 includes: an upper wing plate 20; a lower wing plate 30, which is disposed separately from the upper wing plate 20; a connecting post 40, which connects the front end of the upper wing plate 20 and the front end of the lower wing plate 30; left and right upper flange portions 11, which are disposed on the left and right side edges of the upper wing plate 20 and extend toward the lower wing plate 30; left and right lower flange portions 12, which are disposed on the left and right side edges of the lower wing plate 30 and extend toward the upper wing plate 20; and a pull tab mounting portion 17, which stands upright from the upper surface of the upper wing plate 20 and extends in the front-rear direction. A pull tab (not shown) is mounted on the pull tab mounting portion 17.

[0043] In the pull head body 10 of this embodiment, when observing the cross-section that passes through the center position of the connecting column 40 in the vertical direction and is orthogonal to the vertical direction (refer to, for example) Figure 3 and Figure 4 The outermost position in the width direction of the pull head in the outer periphery of the connecting post 40 is defined as the outermost position 41 of the connecting post 40.

[0044] The upper flange portion 11 of the slider body 10 has: a parallel flange portion 13 that extends in the front-rear direction with a constant spacing between the left and right upper flange portions 11; and a curved flange portion 14 that extends forward from the front end of the parallel flange portion 13, and the spacing between the left and right upper flange portions 11 increases forward (see reference). Figure 3 ).

[0045] The lower flange portion 12, like the upper flange portion 11, has: a flange parallel portion 13 that extends in the front-rear direction with a constant spacing between the left and right lower flange portions 12; and a flange curved portion 14 that extends forward from the front end of the flange parallel portion 13, and the spacing between the left and right lower flange portions 12 increases forward (see reference). Figure 4 Furthermore, the interval between the left and right upper flange portions 11 and the interval between the left and right lower flange portions 12 refer to the distance along the left and right direction between the inner surfaces of the flanges of the left and right upper flange portions 11 or the left and right lower flange portions 12.

[0046] Specifically, for the upper flange portion 11 and the lower flange portion 12, the position in the front-rear direction between the parallel flange portion 13 and the curved flange portion 14 is defined as the dividing position 15. In the slider body 10 of this embodiment, the dividing position 15 of the upper flange portion 11 and the dividing position 15 of the lower flange portion 12 are arranged at the same position in the front-rear direction of the slider body 10.

[0047] A pair of shoulder openings 18 are formed at the front end of the zipper pull body 10, opening on the left and right sides of the connecting post 40. A rear opening 19 is formed at the rear end of the zipper pull body 10, opening to the rear. The rear opening 19 is surrounded by an upper flange 20, a lower flange 30, left and right upper flanges 11, and left and right lower flanges 12. A Y-shaped zipper tooth guide path is formed between the upper flange 20 and the lower flange 30, connecting the left and right shoulder openings 18 and the rear opening 19. On the left and right side edges of the zipper pull body 10, a zipper tape (not shown) is formed between the upper flange 11 and the lower flange 12 for the zipper tape to pass through. The tape pass gap communicates with the zipper tooth guide path.

[0048] The inner surface of the zipper head body 10 has a tooth guide surface facing the tooth guide path. The tooth guide surface guides the movement of the zipper teeth within the zipper head body 10. The tooth guide surface has an upper wing inner surface (upper tooth guide surface) 21 provided on the upper wing plate 20, a lower wing inner surface (lower tooth guide surface) 31 provided on the lower wing plate 30, the flange inner surfaces of the left and right upper flange portions 11, and the flange inner surfaces of the left and right lower flange portions 12.

[0049] The upper wing plate 20 includes: an outer surface (upper upper surface of the upper wing plate) 22, which is disposed on the opposite side of the inner surface 21 of the upper wing plate and faces upward; and an outer peripheral surface 23, which is disposed along the outer periphery of the upper wing plate 20 and is continuous with the outer surface 22 and the inner surface 21 of the upper wing plate. The lower wing plate 30 includes: an outer surface (lower surface of the lower wing plate) 32, which is disposed on the opposite side of the inner surface 31 of the lower wing plate and faces downward; and an outer peripheral surface 33, which is disposed along the outer periphery of the lower wing plate 30 and is continuous with the outer surface 32 and the inner surface 31 of the lower wing plate. The outer peripheral surfaces 23 of the upper wing plate and 33 of the lower wing plate are arranged in a direction orthogonal to the vertical direction.

[0050] For example, Figure 3As shown, the inner surface 21 of the upper wing plate has: an upper main plane 24, which is formed parallel to the front-rear direction; a pair of upper forward inclined portions 25, which are provided at the ends of the left and right shoulder openings 18; an upper reference inclined portion 26, which is provided on both sides of each upper forward inclined portion 25; and an upper receiving step portion 27, which is disposed adjacent to the upper forward inclined portion 25 on the inner side of the chain tooth guide path. In addition, the inner surface 21 of the upper wing plate has an upper rear inclined portion 28 provided at the end (rear end) on the rear opening 19 side and a pair of upper groove portions 50 recessed relative to the upper main plane 24.

[0051] Furthermore, in this invention, the ends of the upper wing plate inner surface 21 and the lower wing plate inner surface 31 on the shoulder opening 18 side (sometimes also referred to as shoulder opening side ends) are the portions of the upper wing plate 20 or the lower wing plate 30 extending inward from the shoulder opening 18 of the zipper pull body 10 toward the chain tooth guide path, respectively. Additionally, the shoulder opening side ends can also be described as the portion of the upper wing plate inner surface 21 or the lower wing plate inner surface 31 adjacent to the shoulder opening 18 and the surrounding area. The ends of the upper wing plate inner surface 21 and the lower wing plate inner surface 31 on the rear opening 19 side (sometimes also referred to as rear opening side ends) are the portions of the upper wing plate 20 or the lower wing plate 30 extending inward from the rear opening 19 toward the chain tooth guide path. Additionally, the rear opening side ends can also be described as the portion of the upper wing plate inner surface 21 and the lower wing plate inner surface 31 adjacent to the rear opening 19 and the surrounding area.

[0052] The upper principal plane 24 of the upper wing 20 is formed by a flat surface orthogonally arranged to the vertical direction. When viewing the inner surface 21 of the upper wing from below (refer to...) Figure 3 The upper main plane 24 is located in the front-to-back direction between the front end of the left and right upper flange 11 and the upper rear inclined portion 28. In addition, it is located in the left and right direction between the left and right upper flange 11.

[0053] The upper main plane 24 has a central plane 24a disposed between a pair of upper recesses 50 and a pair of side planes 24b disposed on the outer side in the left-right direction than the upper recesses 50. By having the central plane 24a and side planes 24b in this way, although the upper recesses 50 are provided on the inner surface 21 of the upper wing plate, the upper main plane 34 of the lower wing plate 30, together with the lower main plane 34 described later, can stably support the meshing left and right zipper teeth in the vertical direction within the zipper tooth guide path of the zipper head body 10.

[0054] The upper forward-sloping portions 25 are disposed on the left and right shoulder-side ends of the inner surface 21 of the upper wing plate. The upper forward-sloping portions 25 are configured to prevent at least a portion of the zipper teeth from contacting the inner surface 21 of the upper wing plate, both for zipper teeth entering the zipper tooth guide path from the shoulder opening 18 of the zipper head body 10 and for zipper teeth moving towards the shoulder opening 18. The left and right upper forward-sloping portions 25 have mutually symmetrical shapes. Each upper forward-sloping portion 25 has an inclined surface that slopes towards the shoulder opening 18, thereby reducing the thickness of the upper wing plate 20. The thickness of the upper wing plate 20 refers to the vertical dimension between the inner surface 21 and the outer surface 22 of the upper wing plate.

[0055] When viewing the upper wing 20 from below (see reference) Figure 3 The upper front inclined portion 25 has upper reference inclined portions 26 on both sides, which are inclined in such a way as to reduce the thickness of the upper wing plate 20 towards the shoulder opening 18. The upper reference inclined portion 26 has a first upper reference inclined portion 26a disposed between the upper front inclined portion 25 and the connecting post 40 and a second upper reference inclined portion 26b disposed between the upper front inclined portion 25 and the upper flange portion 11. By providing the first upper reference inclined portion 26a and the second upper reference inclined portion 26b, the upper front inclined portion 25 is provided separately from the connecting post 40 and the upper flange portion 11, respectively.

[0056] The upper reference inclined portion 26 is formed to bulge downward or protrude downward in a manner that is closer to the lower wing plate 30 than the upper front inclined portion 25. Therefore, the inclined surface of the upper front inclined portion 25 is formed to be recessed relative to the inclined surfaces of the two adjacent upper reference inclined portions 26.

[0057] By having the shape described above for the upper reference inclined portion 26, for example, when the zipper teeth move within the tooth guide path of the zipper head body 10 while contacting the inner surface 21 of the upper wing plate, the tooth head and / or tooth leg of the zipper teeth can be stably contacted with at least one of the upper reference inclined portions 26. Furthermore, at least a portion of the zipper teeth can be separated from the upper forward inclined portion 25, forming a non-contact portion that does not contact the inner surface 21 of the upper wing plate at least a portion of the zipper teeth.

[0058] Therefore, when the zipper pull 1 slides, within the zipper tooth guide path of the zipper pull body 10, the zipper teeth can be kept in an appropriate posture by utilizing the upper reference inclined portion 26 while moving forward or backward. At the same time, at least a portion of the zipper teeth can be kept in a non-contact state relative to the upper forward inclined portion 25 of the upper wing plate 20. Therefore, even if the zipper teeth contact the shoulder end of the inner surface 21 of the upper wing plate when the zipper pull 1 slides, the zipper teeth are less likely to be scraped by the upper wing plate 20.

[0059] The upper left and right sides of the upper wing plate 20 have upper receiving step portions 27 for inserting and receiving the first stop member when the zipper 1 stops by contacting the first stop member of the zipper. The upper left and right receiving step portions 27 have a flat upper step surface 27a and an upper connecting surface 27b, respectively.

[0060] The upper step surface 27a of the upper receiving step portion 27 is formed by a plane orthogonal to the vertical direction. The upper step surface 27a is positioned inside the upper forward inclined portion 25 in the chain tooth entry direction, and is formed adjacent to the upper forward inclined portion 25. The chain tooth entry direction is the direction from the shoulder opening 18 toward the interior of the chain tooth guide path, for example, the direction from the shoulder opening 18 toward the midpoint between the connecting post 40 and the upper flange portion 11.

[0061] The upper step surface 27a of the upper receiving step portion 27 is smoothly and continuously formed with the upper forward inclined portion 25, and is recessed relative to the upper main plane 24. The upper connecting surface 27b of the upper receiving step portion 27 is disposed between the upper step surface 27a and the upper main plane 24. The upper connecting surface 27b is formed by an inclined surface that is inclined relative to the upper step surface 27a and the upper main plane 24 and is smoothly continuous with the upper step surface 27a and the upper main plane 24.

[0062] The upper rearward inclined portion 28 of the upper wing plate 20 is provided at the end of the inner surface 21 of the upper wing plate on the rear opening 19 side. For example, when observing a cross section of the upper wing plate 20 orthogonal to the left and right direction (not shown), the upper rearward inclined portion 28 has an inclined surface that is inclined toward the rear opening 19, thereby reducing the thickness of the upper wing plate 20. Moreover, the inclined surface of the upper rearward inclined portion 28 has a curved surface that is convex toward the lower wing plate 30 (or toward the chain tooth guide path). In this embodiment, the inclined surface of the upper rearward inclined portion 28 is formed as a convex curved surface throughout the front-rear direction of the upper rearward inclined portion 28.

[0063] By providing such an upper rearward tilted portion 28, when the zipper pull 1 slides, even if the zipper teeth come into contact with the rear end of the inner surface 21 of the upper wing plate, it is possible to prevent or suppress strong friction between the zipper teeth and the upper rearward tilted portion 28, so that the zipper teeth are not easily scratched by the upper wing plate 20.

[0064] Each of the pair of upper recesses 50 has a shape that is recessed relative to the upper main plane 24. Each upper recess 50 is arranged in a straight line along the front-back direction such that a portion of the connecting post 40 is included inside the upper recess 50. In other words, the upper recess 50 is arranged such that it partially overlaps with the connecting post 40 in the left-right direction.

[0065] A pair of upper groove portions 50 are arranged separately from each other in the left-right direction. Each upper groove portion 50 is arranged separately from the upper flange portion 11 in the left-right direction. By arranging the left and right upper groove portions 50 in this way, the aforementioned central plane 24a and side plane 24b of the upper main plane 24 can be stably set.

[0066] Each upper recess 50 has: a groove bottom 51 having a flat surface; and a pair of groove side edges 52 disposed on the left and right sides of the groove bottom 51. The groove side edges 52 have an inner groove side edge 52a disposed on the inner side in the left-right direction of the groove bottom 51 and an outer groove side edge 52b disposed on the outer side in the left-right direction of the groove bottom 51.

[0067] The bottom 51 of the upper recess 50 is positioned vertically further away from the lower main plane 34 of the lower wing 30 (described later) than the upper main plane 24 of the upper wing 20 (i.e., positioned higher than the upper main plane 24). The left-right dimension (width dimension) of the bottom 51 is set to a constant size in the front-back direction, except for the area (part) where the connecting post 40 is formed.

[0068] When viewed in cross-section from below, each upper groove 50 has a generally rectangular shape that is continuous from the shoulder opening 18 side to the rear opening 19 side of the upper wing 20, except for the area (partial) where the connecting post 40 is formed. Specifically, in this embodiment, each upper groove 50 is continuously formed from a position forward of the outermost position 41 of the connecting post 40 to a position rearward of the boundary between the upper main plane 24 and the upper rearward inclined portion 28. When viewed in cross-section from below, the groove bottom 51 of the upper wing 20 has a generally rectangular shape that is longer in the front-rear direction.

[0069] The bottom 51 of the upper recess 50 is formed smoothly and continuously with the first upper reference inclined portion 26a provided in front of the bottom 51. The bottom 51 has: a first bottom surface 53, which is formed by a plane orthogonal to the vertical direction; and a second bottom surface 54, which extends rearward from the first bottom surface 53 and is curved into a convex shape in the front-rear direction. In this embodiment, the groove depth of the upper recess 50 is set to be 0.01 mm or more and 0.1 mm or less. The groove depth of the upper recess 50 is the vertical dimension between the upper main plane 24 and the first bottom surface 53 of the bottom 51.

[0070] Since the groove depth of the upper recess 50 is 0.01 mm or more, even if burrs are formed along the upper parting line 70 (described later) of the upper flange 20 during the forming of the slider body 10, these burrs can be contained within the upper recess 50, preventing or suppressing their protrusion relative to the upper main plane 24. Since the groove depth is 0.1 mm or less, even if the upper recess 50 is provided on the inner surface 21 of the upper flange, it is less likely to be noticeable, preventing a decrease in the appearance quality of the slider body 10. Furthermore, the strength of the upper flange 20 can be reliably ensured.

[0071] Each upper groove 50 has a groove bottom 51 with a size in the left-right direction that is 10% to 40% of the interval between the parallel flange portions 13 of the left and right upper flange portions 11. Because the groove bottom 51 has a size of 10% or more of the interval between the parallel flange portions 13, the upper parting line 70 of the mold can be easily set within the upper groove 50. Because the groove bottom 51 has a size of 40% or less of the interval between the parallel flange portions 13, the upper main plane 24 can be formed wider on the inner surface 21 of the upper wing plate. Therefore, the zipper teeth passing through the zipper tooth guide path of the zipper head body 10 can be stably guided by the upper wing plate 20.

[0072] The first bottom surface 53 of the groove bottom 51 is continuously formed in the front-rear direction from a position forward of the outermost position 41 of the connecting post 40 to a position rearward of the boundary position between the upper main plane 24 and the upper rearward inclined portion 28. In other words, the first bottom surface 53 of the groove bottom 51 is formed to be longer in the front-rear direction than the range from the outermost position 41 of the connecting post 40 to the boundary position between the upper main plane 24 and the upper rearward inclined portion 28. As a result, as will be described later, it is easy to set the upper parting line 70 of the mold forming the pull head body 10 longer within the upper groove portion 50 (especially the first bottom surface 53 of the groove bottom 51).

[0073] The second bottom surface 54 of the groove bottom 51 has an inclined surface that decreases in the rearward direction in order to make the thickness of the upper wing plate 20 decrease. In other words, the inclined surface of the second bottom surface 54 is inclined in such a way that the vertical dimension of the distance from the position of the lower main plane 34 of the lower wing plate 30 to the second bottom surface 54 of the upper wing plate 20 increases in the rearward direction. This inclined surface preferably has a curved surface that bends upward into a convex shape. In this embodiment, the entire front-rear direction of the second bottom surface 54 is formed by a convex curved surface.

[0074] Since the bottom 51 of the upper recess 50 has a second bottom surface 54, no steps or uneven shapes are formed between the bottom 51 of the upper recess 50 and the upper rearward inclined portion 28 disposed behind the bottom 51 of the recess, allowing the inclined surfaces of the bottom 51 and the upper rearward inclined portion 28 to be smoothly continuous in the front-back direction. Therefore, even with the upper recess 50 provided, it is not easily noticeable, preventing or suppressing a decrease in the appearance quality of the slider 1. Furthermore, the thickness of the upper wing plate 20 can be appropriately ensured at its rear end, thus preventing a reduction in strength caused by the provision of the upper recess 50.

[0075] The inner groove edge 52a of each upper groove portion 50 is positioned inside the left-right direction from the outermost position 41 of the connecting column 40. The outer groove edge 52b of each upper groove portion 50 is positioned outside the left-right direction from the outermost position 41 of the connecting column 40. That is, the left-right regions formed by each upper groove portion 50 are respectively arranged such that at least a portion of the outer peripheral surface of the connecting column 40 (specifically, at least a portion of the left-right oriented sidewall surface of the outer peripheral surface of the connecting column 40) is disposed between the inner groove edge 52a and the outer groove edge 52b. In particular, each upper groove portion 50 is disposed such that the outermost position 41 of the connecting column 40 is disposed between the inner groove edge 52a and the outer groove edge 52b.

[0076] like Figure 3 As shown, the upper parting line 70 of the mold (sliding core) used for forming the slider body 10 is included in the inner surface 21 of the upper wing plate 20. The upper parting line 70 has: an upper first parting line 71, which extends from the connecting post 40 on the left side (one side) in the slider width direction; and an upper second parting line 72, which extends from the connecting post 40 on the right side (the other side) in the slider width direction.

[0077] The upper first parting line 71 and the upper second parting line 72 each have: an upper first horizontal line 73 extending from the outer peripheral surface of the connecting post 40 toward the shoulder opening 18; an upper vertical line 74 extending from the top of the upper first horizontal line 73 via a bend toward the rear opening 19; and an upper second horizontal line 75 extending from the top of the upper vertical line 74 on the rear opening 19 side via a bend toward the upper flange 11.

[0078] The first horizontal line 73 on the upper side extends in a straight line from the outermost position 41 of the outer periphery of the connecting column 40 toward the outer side in the left and right directions.

[0079] The upper longitudinal line 74 extends in a straight line from the top of the upper first horizontal line 73 toward the rear. Specifically, the upper longitudinal line 74 extends in the front-rear direction within the range from the outermost position 41 of the connecting post 40 to the boundary position 15 between the parallel portion 13 and the curved portion 14 of the upper flange portion 11. The upper longitudinal line 74 is arranged at an angle relative to the front-rear direction, with its rear end positioned laterally to the outside of the front end of the upper longitudinal line 74.

[0080] The upper second horizontal line 75 extends outward in the left and right directions from the rear end of the upper vertical line 74 (the dividing position 15 between the parallel flange portion 13 and the curved flange portion 14), and connects to the inner wall surface of the upper flange portion 11.

[0081] In this embodiment, the entirety of the upper first parting line 71 and the upper second parting line 72, the entirety of the upper first horizontal line 73, the entirety of the upper vertical line 74, and a portion of the upper second horizontal line 75 are set within the upper groove portion 50.

[0082] For example, Figure 4 As shown, the inner surface 31 of the lower wing plate has: a lower main plane 34, which is formed parallel to the front-rear direction; a pair of lower forward inclined portions 35, which are provided at the ends of the left and right shoulder openings 18; a lower reference inclined portion 36, which is provided on both sides of each lower forward inclined portion 35; and a lower receiving step portion 37, which is disposed adjacent to the lower forward inclined portion 35 on the inner side of the chain tooth guide path. In addition, the inner surface 31 of the lower wing plate has a lower rear inclined portion 38 provided at the end (rear end) on the rear opening 19 side and a pair of lower groove portions 60 recessed relative to the lower main plane 34.

[0083] The lower main plane 34 of the lower wing plate 30 is formed by a flat surface orthogonally arranged to the vertical direction. Like the upper main plane 24, the lower main plane 34 has a central plane 34a disposed between a pair of lower recesses 60 and a pair of side planes 34b disposed on the outer side of the lower recesses 60 in the left-right direction. By providing the aforementioned upper main plane 24 and lower main plane 34, although upper recesses 50 and lower recesses 60 are respectively provided on the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate, the central planes 24a and 34a and the side planes 24b and 34b of the upper and lower main planes 24 and 34 respectively can stably support the zipper tooth heads and tooth legs in the vertical direction. Therefore, the left and right zipper teeth can move in an appropriate posture within the tooth guide path of the zipper head body 10.

[0084] The lower forward inclined portions 35 are disposed on the left and right shoulder-side ends of the inner surface 31 of the lower wing plate. The lower forward inclined portions 35 are configured to prevent at least a portion of the zipper teeth from contacting the inner surface 31 of the lower wing plate, both for zipper teeth entering the zipper tooth guide path from the shoulder opening 18 of the zipper head body 10 and for zipper teeth moving towards the shoulder opening 18. The left and right lower forward inclined portions 35 have a mutually symmetrical shape. Each lower forward inclined portion 35 has an inclined surface that slopes towards the shoulder opening 18, thereby reducing the thickness of the lower wing plate 30. The thickness of the lower wing plate 30 is referred to as the vertical dimension between the inner surface 31 and the outer surface 32 of the lower wing plate.

[0085] When viewing the lower wing 30 from above (refer to...) Figure 4 The lower front inclined portion 35 has lower reference inclined portions 36 on both sides, which are inclined toward the shoulder opening 18 to reduce the thickness of the lower wing plate 30. The lower reference inclined portion 36 has a first lower reference inclined portion 36a disposed between the lower front inclined portion 35 and the connecting post 40, and a second lower reference inclined portion 36b disposed between the lower front inclined portion 35 and the upper flange portion 11. By providing the first lower reference inclined portion 36a and the second lower reference inclined portion 36b, the lower front inclined portion 35 is provided separately from the connecting post 40 and the upper flange portion 11, respectively.

[0086] The lower reference inclined portion 36 is formed to bulge upward or protrude upward in a manner that is closer to the upper wing plate 20 than the lower front inclined portion 35. Therefore, the inclined surface of the lower front inclined portion 35 is formed to be recessed relative to the inclined surfaces of the two adjacent lower reference inclined portions 36.

[0087] Because the lower reference inclined portion 36 has the shape described above, when the zipper teeth move within the tooth guide path of the zipper head body 10 while, for example, one side of the zipper teeth is in contact with the inner surface 31 of the lower wing plate, a non-contact portion that does not contact the inner surface 31 of the lower wing plate can be formed at least in a portion of the zipper teeth, similar to the case of the upper wing plate 20. Therefore, even if the zipper teeth contact the shoulder end of the inner surface 31 of the lower wing plate when the zipper head 1 slides, it is not easy to scratch the zipper teeth.

[0088] The left and right lower receiving step portions 37 and lower rearward inclined portions 38 in the lower wing plate 30 are formed in substantially the same way as the left and right upper receiving step portions 27 and upper rearward inclined portions 28 in the upper wing plate 20. Specifically, each lower receiving step portion 37 of the lower wing plate 30 has: a flat lower step surface 37a, which is orthogonal to the vertical direction; and a lower connecting surface 37b, which is disposed between the lower step surface 37a and the lower main plane 34, and is inclined relative to the lower step surface 37a and the lower main plane 34.

[0089] The lower rearward inclined portion 38 of the lower wing plate 30 is provided at the end of the lower wing plate inner surface 31 on the rear opening 19 side. The inclined surface of the lower rearward inclined portion 38 has a convex curved surface that curves in a convex manner toward the upper wing plate 20 in the overall front-rear direction of the lower rearward inclined portion 38.

[0090] Each of the pair of lower recesses 60 has a shape that is recessed relative to the lower main plane 34. Each lower recess 60 is arranged in a straight line along the front-rear direction such that a portion of the connecting post 40 is included within the lower recess 60. In other words, the lower recess 60 is arranged to partially overlap with the connecting post 40 in the left-right direction. The pair of lower recesses 60 are arranged separately from each other in the left-right direction. Each lower recess 60 is arranged separately from the upper flange 11 in the left-right direction.

[0091] When viewed in cross-section from above, each lower recess 60 has a generally rectangular shape that is continuous from the shoulder opening 18 side to the rear opening 19 side of the lower wing 30, except for the area (partial) where the connecting post 40 is formed. Specifically, in this embodiment, each lower recess 60 is continuously formed from a position forward of the outermost position 41 of the connecting post 40 to a position rearward of the boundary between the lower main plane 34 and the lower rearward inclined portion 38. In this embodiment, a pair of lower recesses 60 in the lower wing 30 are positioned correspondingly in the left-right direction to the same positions as a pair of upper recesses 50 in the upper wing 20.

[0092] When forming the slider body 10 using a mold, as described later, the upper groove portion 50 of the upper wing plate 20 and the lower groove portion 60 of the lower wing plate 30 are formed using the sliding cores at the front and rear of the mold. As described above, the upper groove portion 50 and the lower groove portion 60 have a generally rectangular shape that is continuous along the front and rear direction. Therefore, by using the sliding cores at the front and rear, without forming undercut portions on the left and right sides of the connecting post 40 of the slider body 10, a pair of upper groove portions 50 and a pair of lower groove portions 60 can be formed stably and smoothly.

[0093] Each lower recess 60 has: a recess bottom 61 having a flat surface; and a pair of recess side edges 62 disposed on the left and right sides of the recess bottom 61. The recess side edges 62 have an inner recess side edge 62a disposed on the inner side in the left-right direction of the recess bottom 61 and an outer recess side edge 62b disposed on the outer side in the left-right direction of the recess bottom 61.

[0094] The bottom 61 of the lower recess 60 is positioned vertically further away from the upper main plane 24 of the upper wing 20 than the lower main plane 34 of the lower wing 30 (i.e., lower than the lower main plane 34). When viewed in cross-section from above, the bottom 61 of the lower wing 30, except for the area (partial) where the connecting post 40 is formed, has a generally rectangular shape that is longer in the longitudinal direction. The lateral dimension (width) of the bottom 61 is set to a constant size overall in the longitudinal direction. The bottom 61 is formed in a smooth, continuous manner with the first lower reference inclined portion 36a located in front of the bottom 61.

[0095] The bottom 61 of the lower recess 60 has: a first bottom surface 63 formed by a plane orthogonal to the vertical direction; and a second bottom surface 64 extending rearward from the first bottom surface 63 and curved into a convex shape in the front-rear direction. In this embodiment, the groove depth of the lower recess 60 is set to be 0.01 mm or more and 0.1 mm or less, in the same manner as the groove depth of the upper recess 50. The groove depth of the lower recess 60 is the vertical dimension between the lower main plane 34 and the first bottom surface 63 of the bottom 61. Furthermore, the groove depth of the lower recess 60 is preferably the same as the groove depth of the upper recess 50.

[0096] Each lower groove 60 has a groove bottom 61 with a size in the left-right direction that is more than 10% and less than 40% of the interval between the flange parallel portions 13 of the left and right upper flange portions 11. This allows the parting line of the mold to be easily set within the lower groove 60. Furthermore, the lower main plane 34 can be formed wider on the inner surface 31 of the lower wing plate, thus enabling the lower wing plate 30 to stably guide the zipper teeth passing through the zipper tooth guide path of the zipper head body 10.

[0097] The first bottom surface 63 of the groove bottom 61 in the lower recess 60 is continuously formed in the front-rear direction from a position further forward than the outermost position 41 of the connecting post 40 to a position further rearward than the boundary position between the lower main plane 34 and the lower rearward inclined portion 38. In other words, the first bottom surface 63 of the groove bottom 61 is formed to be longer in the front-rear direction than the range from the outermost position 41 of the connecting post 40 to the boundary position between the lower main plane 34 and the lower rearward inclined portion 38.

[0098] The second bottom surface 64 of the groove bottom 61 is formed by an inclined surface that decreases in thickness toward the rear. In other words, the inclined surface of the second bottom surface 64 is inclined such that the vertical dimension of the distance from the position of the upper main plane 24 of the upper wing plate 20 to the second bottom surface 64 of the lower wing plate 30 increases toward the rear. This inclined surface preferably has a curved surface that curves upward into a convex shape. In this embodiment, the entire second bottom surface 64 in the front-rear direction is formed by a convex curved surface. By providing such a second bottom surface 64 at the groove bottom 61 of the lower wing plate 30, similar to the case of the upper groove portion 50, the lower groove portion 60 can be made less conspicuous. In addition, the reduction in strength caused by the provision of the lower groove portion 60 at the rear end of the lower wing plate 30 can be prevented.

[0099] The inner groove edge 62a of each lower groove portion 60 is positioned inside the left-right direction from the outermost position 41 of the connecting column 40. The outer groove edge 62b of each lower groove portion 60 is positioned outside the left-right direction from the outermost position 41 of the connecting column 40. The left-right regions formed by each lower groove portion 60 are respectively arranged such that at least a portion of the outer peripheral surface of the connecting column 40 (specifically, at least a portion of the left-right oriented sidewall surface of the outer peripheral surface of the connecting column 40) is disposed between the inner groove edge 62a and the outer groove edge 62b. In particular, each lower groove portion 60 is disposed between the inner groove edge 62a and the outer groove edge 62b with the outermost position 41 of the connecting column 40 disposed.

[0100] like Figure 4 As shown, the lower wing plate 30 contains a lower parting line 80 on its inner surface 31, which is used for forming the mold (sliding core) of the slider body 10. The lower parting line 80 is provided in essentially the same way as the upper parting line 70 provided on the upper wing plate 20. That is, the lower parting line 80 has: a lower first parting line 81, which extends from the connecting post 40 on the left side (one side) in the slider width direction; and a lower second parting line 82, which extends from the connecting post 40 on the right side (the other side) in the slider width direction.

[0101] The lower first parting line 81 and the lower second parting line 82 each have: a lower first horizontal line 83 extending from the outer peripheral surface of the connecting post 40 toward the shoulder opening 18; a lower vertical line 84 extending from the top of the lower first horizontal line 83 via a bend toward the rear opening 19; and a lower second horizontal line 85 extending from the top of the lower vertical line 84 on the rear opening 19 side via a bend toward the lower flange 12. In the lower first parting line 81 and the lower second parting line 82, the entire lower first horizontal line 83, the entire lower vertical line 84, and a portion of the lower second horizontal line 85 are set within the lower recess 60.

[0102] When the cross-section of the connecting post 40 is cut at the center position in the vertical direction and orthogonal to the vertical direction (see example...), Figure 3 and Figure 4 The connecting column 40 of the slider body 10 has a front end 42 facing forward, an arc-shaped rear end face 43 facing the rear opening 19, and a pair of left and right side walls 44 disposed between the front end 42 and the rear end face 43.

[0103] The connecting column 40, in the cross-sectional view, has a front increasing portion 45 that increases rearward in the distance between the left and right column sidewalls 44, and a rear decreasing portion 46 that decreases rearward in the distance between the left and right column sidewalls 44. The front increasing portion 45 is disposed in front of the rear decreasing portion 46. The outermost position 41 of the connecting column 40 is provided on the portion of the column sidewalls 44 between the front increasing portion 45 and the rear decreasing portion 46. The outermost position 41 may also be provided within a predetermined range formed along the front-rear direction.

[0104] Next, the method for manufacturing the pull head 1 of this embodiment will be described.

[0105] First, the zipper head body 10 and the zipper tab (not shown) for preparing the zipper head 1 are manufactured separately. Furthermore, the method for manufacturing the zipper tab is not particularly limited in this invention.

[0106] The slider body 10 is manufactured by die casting of metal using a mold (not shown) for the slider body 10. In this case, the mold has a mold body and front and rear sliding cores that can be inserted and removed relative to the mold body. The front and rear sliding cores of the mold form the chain tooth guide path, a pair of upper grooves 50, and a pair of lower grooves 60 of the slider body 10.

[0107] The parting lines in the mold that indicate the dividing positions of the front and rear sliding cores have an upper parting line 70 set for the inner surface 21 of the upper wing plate 20 and a lower parting line 80 set for the inner surface 31 of the lower wing plate 30 (see reference). Figure 3 and Figure 4 Furthermore, in this invention, the position and length of the parting lines of the mold, other than the upper parting line 70 and the lower parting line 80, are not particularly limited.

[0108] Through such Figure 3 and Figure 4 As shown, a die-casting process is performed using a mold with an upper parting line 70 and a lower parting line 80 to form a slider body 10 with the shape of the slider mounting part 17 before the slider is mounted. At this time, burrs may sometimes form along the parting line of the mold in the formed slider body 10 due to dimensional errors or misalignments of the mold.

[0109] Therefore, in this embodiment, after the die-casting process of the slider body 10, a [material / process] is used for the formed slider body 10. Figure 5 and Figure 6 The trimming device, such as the trimming tool 90 (sometimes called a trimmer), performs a trimming process (trimming process) inside the zipper head body 10 (within the chain tooth guide path) to remove burrs formed on the upper main plane 24 of the upper wing plate 20, the lower main plane 34 of the lower wing plate 30, and the outer peripheral surface of the connecting post 40.

[0110] Figure 5 and Figure 6 The trimming cutter 90 shown is arranged in a manner that allows it to move relative to the slider body 10 in the front-rear direction, and is configured such that a portion of the trimming cutter 90 can be inserted from the rear opening 19 of the slider body 10 into the chain tooth guide path and the through gap of the slider body 10.

[0111] The trimming cutter 90 has a cutter body portion 91 that can be inserted into the chain tooth guide path of the zipper head body 10 and an opening portion 92 formed from the front end of the cutter body portion 91 toward the rear. When the cutter body portion 91 is inserted into the zipper head body 10, the connecting post 40 of the zipper head body 10 is inserted into the opening portion 92 of the trimming cutter 90.

[0112] The thickness between the upper and lower surfaces of the cutter body 91 is set to be the same as the distance between the upper main plane 24 of the inner surface 21 of the upper wing plate and the lower main plane 34 of the inner surface 31 of the lower wing plate in the slider body 10. The maximum value of the left-right dimension of the opening 92 of the cutter body 91 is set to be the same as the maximum value of the left-right dimension of the connecting post 40 of the slider body 10 (i.e., the left-right dimension of the outermost position 41 of the connecting post 40).

[0113] In the trimming process, firstly, the slider body 10 of the workpiece is placed and fixed in the slider fixing part (not shown) of the trimming device. Next, the trimming cutter 90 is inserted from the rear opening 19 of the slider body 10 into the chain tooth guide path relative to the slider body 10 fixed in the slider fixing part.

[0114] Therefore, even if burrs are formed on, for example, the outer peripheral surface of the connecting column 40, the upper main plane 24 of the upper flange 20, the lower main plane 34 of the lower flange 30, the inner wall surface of the flange parallel portion 13 of the upper flange portion 11, and the inner wall surface of the flange parallel portion 13 of the lower flange portion 12 during the forming of the slider body 10, the formed burrs can be removed by the tool body portion 91 of the dressing tool 90.

[0115] For example, when viewed from the front, the cutter body 91 has four corner portions 93 adjacent to the opening 92, allowing the removal of burrs formed along the outermost position 41 of the connecting post 40 using portions including the four corner portions 93. Furthermore, when the cutter body 91 of the trimming cutter 90 is inserted into the slider body 10, when viewed from the front, the slider body 10 and the cutter body 91 show gaps formed by the upper groove portion 50 and the lower groove portion 60 visible on the outer side of each corner portion 93 in the vertical direction (see reference). Figure 6 ).

[0116] On the other hand, during the trimming process of the slider body 10, when the slider body 10 is fixed to the slider fixing part of, for example, the trimming device, the following situations occur: the posture of the slider body 10 is slightly tilted relative to the posture suitable for trimming; and a dimensional error occurs between the slider body 10 and the tool body part 91 of the trimming tool 90.

[0117] Here, we will describe, for example, the case where the upper wing inner surface 21 and the lower wing inner surface 31 of the slider body 10 do not have the upper groove 50 and lower groove 60 as in this embodiment. In this case, when the cutter body 91 is inserted into the slider body 10, for example, in a slightly tilted position, and when the cutter body 91 is inserted into the slider body 10 while there is a dimensional error between the slider body 10 and the cutter body 91, at least one of the four corner portions 93 of the cutter body 91 scrapes the upper wing inner surface 21 and / or the lower wing inner surface 31 of the slider body 10, causing damage to these inner surfaces.

[0118] In contrast, as described above, the slider body 10 of this embodiment has a pair of upper grooves 50 formed on the inner surface 21 of the upper wing plate and a pair of lower grooves 60 formed on the inner surface 31 of the lower wing plate. Furthermore, the inner groove edge 52a of each upper groove 50 and the inner groove edge 62a of each lower groove 60 are positioned inward in the left-right direction from the outermost position 41 of the connecting post 40. Moreover, the outer groove edge 52b of each upper groove 50 and the outer groove edge 62b of each lower groove 60 are positioned outward in the left-right direction from the outermost position 41 of the connecting post 40.

[0119] Therefore, even if the slider fixing part of the trimming device is fixed in a slightly tilted position, or even if there is a dimensional error between the slider body 10 and the cutter body 91, the corner 93 of the cutter body 91 can pass through the range where the upper groove 50 and the lower groove 60 are formed in the left and right direction of the slider body 10 when the cutter body 91 of the trimming cutter 90 is inserted into the slider body 10.

[0120] As a result, the corner 93 of the tool body 91 can be moved in the front-back direction in such a way that the inner surfaces 21 of the upper wing plate and 31 of the lower wing plate of the slider body 10 avoid (move away from) the corner 93 of the tool body 91. Therefore, it is possible to prevent or suppress the corner 93 from directly contacting the inner surfaces 21 of the upper wing plate and 31 of the lower wing plate of the slider body 10 and damaging these inner surfaces.

[0121] After the slider body 10 has undergone finishing processing, a separately prepared pull tab (not shown) is then attached to the pull tab mounting portion 17 of the slider body 10 and held in the pull tab mounting portion 17. Furthermore, the pull tab mounting portion 17 is plastically deformed in the direction closer to the upper flange 20 so that the pull tab does not detach from the pull tab mounting portion 17. Thus, the slider 1 of this embodiment, in which the pull tab is mounted on the slider body 10, is manufactured.

[0122] In addition, the manufactured zipper head 1 is slidably mounted on the chain teeth of the left and right zipper belts to form a zipper.

[0123] According to the zipper pull 1 of this embodiment, a pair of upper grooves 50 along the front-rear direction are formed on the inner surface 21 of the upper wing plate 20, and a pair of lower grooves 60 along the front-rear direction are formed on the inner surface 31 of the lower wing plate 30. In addition, an upper parting line 70 is provided in the upper grooves 50 of the upper wing plate 20, and a lower parting line 80 is provided in the lower grooves 60 of the lower wing plate 30.

[0124] Therefore, even if burrs are formed on the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate along the parting line of the mold during the forming of the zipper pull 1, the burrs can be contained within the upper groove 50 and the lower groove 60, preventing or suppressing the burrs from protruding into the zipper tooth guide path relative to the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate. Therefore, even if the zipper pull 1 of this embodiment is used in a zipper and the zipper pull 1 is repeatedly slidable, the burrs formed on the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate are unlikely to come into contact with the zipper teeth.

[0125] Therefore, it is less likely that burrs formed on the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate of the zipper pull body 10 will scratch the zipper teeth. As a result, even with repeated sliding operations of the zipper pull 1, the appearance quality of the zipper is less likely to be degraded due to the exposure of the metal parts inside the zipper teeth. Therefore, it is easier to maintain the appearance of the zipper for a long time.

[0126] Furthermore, according to the slider 1 of this embodiment, after the slider body 10 is die-cast, when the obtained slider body 10 is subjected to deburring finishing processing, as described above, even if the slider body 10 is fixed in a slightly tilted position on the finishing device, damage to the inner surface 21 of the upper flange and the inner surface 31 of the lower flange of the slider body 10 by the finishing cutter 90 of the finishing device can be prevented or suppressed. Therefore, the yield of the slider 1 can be improved.

[0127] Furthermore, the present invention is not limited to the embodiments described above. Various modifications can be made as long as the invention has a substantially the same structure and achieves the same effect.

[0128] For example, in the above embodiment, the upper wing plate 20 and the lower wing plate 30 of the slider body 10 are respectively provided with an upper groove portion 50 and a lower groove portion 60. However, in the present invention, the slider body may be formed by providing a groove portion only on either the upper wing plate or the lower wing plate.

[0129] Furthermore, in the above embodiment, the upper groove 50 provided on the upper wing plate 20 and the lower groove 60 provided on the lower wing plate 30 are respectively formed as straight lines extending vertically in the front-rear direction. However, in the present invention, at least a portion of the upper groove and / or at least a portion of the lower groove may, for example, be formed as straight lines in a direction inclined relative to the front-rear direction, or may be formed as curved inward or outward in the left-right direction. Moreover, at least a portion of the upper groove and / or at least a portion of the lower groove may also be formed such that the groove width of the upper groove and / or the groove width of the lower groove increases or decreases towards the rear.

[0130] Furthermore, in this invention, as long as the parting line is partially included in at least a portion of the upper groove of the upper wing plate and the lower groove of the lower wing plate, the position of the parting line (upper parting line and lower parting line) of the mold set for the pull head body is not particularly limited.

[0131] In the above embodiments, the case where the zipper head 1 is used for a zipper (metal zipper) having multiple metal zipper teeth has been described. However, the zipper head of the present invention can also be used for zippers consisting of multiple zipper teeth other than metal zipper teeth mounted on a zipper tape (i.e., zippers other than metal zippers).

Claims

1. A zipper pull having a zipper pull body (10) comprising: an upper wing plate (20); a lower wing plate (30) disposed separately from the upper wing plate (20); and a connecting post (40) connecting the front end of the upper wing plate (20) to the front end of the lower wing plate (30), characterized in that... A pair of recesses (50, 60) arranged apart from each other in the width direction of the puller are provided on the inner surface of the upper wing plate (20) and / or the inner surface of the lower wing plate (30). Each of the groove portions (50, 60) has an inner groove edge portion (52a) disposed on the inner side in the width direction of the slider and an outer groove edge portion (52b) disposed on the outer side in the width direction of the slider. When observing the cross section of the zipper head body (10) orthogonal to the zipper head height direction, if the outermost position in the zipper head width direction of the outer periphery of the connecting column (40) is defined as the outermost position (41), the inner groove side edge (52a) of each groove portion (50, 60) is positioned inside the zipper head width direction than the outermost position (41), and the outer groove side edge (52b) of each groove portion (50, 60) is positioned outside the zipper head width direction than the outermost position (41).

2. The zipper pull according to claim 1, characterized in that, The pair of grooves (50) are provided on the inner surface of the upper wing plate (20). The pair of grooves (60) are provided on the inner surface of the lower wing plate (30).

3. The zipper pull according to claim 1, characterized in that, Each groove (50, 60) is arranged in a straight line along the length of the pull head.

4. The zipper pull according to claim 1, characterized in that, The slider body (10) has: a pair of upper flanges (11) extending from the side edge of the upper wing plate (20) toward the lower wing plate (30); and a pair of lower flanges (12) extending from the side edge of the lower wing plate (30) toward the upper wing plate (20). Each of the groove portions (50, 60) is arranged to be separate from the upper flange portion (11) or the lower flange portion (12) on the inner side of the upper flange portion (11) or the lower flange portion (12) in the direction of the pull head width.

5. The zipper pull according to claim 1, characterized in that, The inner surface of the upper wing plate (20) and / or the inner surface of the lower wing plate (30) includes the parting lines (70, 80) of the mold used to form the slider body (10). At least a portion of the parting lines (70, 80) are contained within each of the groove portions (50, 60).

6. The zipper pull according to claim 5, characterized in that, The zipper head body (10) has: a pair of upper flanges (11) extending from the side edge of the upper wing plate (20) toward the lower wing plate (30); a pair of lower flanges (12) extending from the side edge of the lower wing plate (30) toward the upper wing plate (20); a pair of shoulder openings (18) opening on both sides of the connecting post (40); and a rear opening (19) opening at the rear end of the zipper head body (10). The parting lines (70, 80) have: a first parting line (71, 81) extending from the connecting post (40) on one side of the slider width direction; and a second parting line (72, 82) extending from the connecting post (40) on the other side of the slider width direction. The first parting line (71, 81) and the second parting line (72, 82) each have: a first horizontal line (73, 83) extending from the connecting post (40) toward the shoulder opening (18); a vertical line (74, 84) extending from the top of the first horizontal line (73, 83) via a bend toward the rear opening (19); and a second horizontal line (75, 85) extending from the top of the vertical line (74, 84) on the rear opening (19) side toward the upper flange (11) or the lower flange (12) via a bend. Each of the said groove portions (50, 60) includes at least the entirety of the first horizontal line (73, 83) and the entirety of the vertical line (74, 84).

Images