Slider

Abstract

The slider (1) of the present invention has a slider body (10), which has an upper wing plate (20) and a lower wing plate (30). A pair of grooves (50, 60) are provided on the inner surface of the upper wing plate (20) and / or the lower wing plate (30). In the cross-sectional view of the slider body (10), when the outermost position in the slider width direction on the outer periphery of the connecting post (40) is defined as the outermost position (41), the inner groove side edge (52a) of each groove (50, 60) is arranged further inside the slider width direction than the outermost position (41), and the outer groove side edge (52b) of each groove (50, 60) is arranged further outside the slider width direction than the outermost position (41). In this way, even if the sliding operation is repeated, the zipper teeth are less likely to be scratched by the inner surface of the slider body (10).

Description

Technical Field

[0001] This invention relates to a slider for zippers. Prior Technology

[0002] As one type of zipper, for example, there are zippers known to have a plurality of zipper teeth made of metal installed in the zipper fabric, as described in International Patent Publication No. 2009 / 128136 (Patent Document 1). Such zippers are sometimes referred to as metal zippers. Previous technical documents Patent documents

[0003] Patent Document 1: International Publication No. 2009 / 128136 Summary of the Invention

[0004] [The problem the invention aims to solve] In traditional metal zippers, when the slider slides, the slider body comes into contact with the metal zipper teeth and friction occurs. For example, when the slider is pulled in both directions on the zipper fabric while being slid, the slider and the zipper teeth tend to rub against each other strongly.

[0005] Therefore, repeated sliding operations can sometimes cause localized scraping of the outer surface of the metal zipper teeth, exposing the metal portion inside the teeth. As a result, on the outer surface of the zipper teeth, there is a difference in color and texture (the feel of the metal) between the part that originally formed the zipper teeth and the inner part that was exposed after being scraped off. This can sometimes degrade the aesthetics of the zipper teeth and reduce the appearance quality of the metal zipper.

[0006] The present invention was made in view of the aforementioned problems, and its object is to provide a slider that makes it difficult for the zipper teeth to be scratched by the slider body even when repeated sliding operations are performed. [Technical means to solve the problem]

[0007] To achieve the above objectives, the slider provided by the present invention is a zipper slider having a slider body, the slider body having: an upper wing plate; a lower wing plate disposed separately from the upper wing plate; and a connecting post connecting the front end of the upper wing plate and the front end of the lower wing plate; in the slider, a pair of groove portions disposed separately from each other in the slider width direction are provided on the inner surface of the upper wing plate and / or the inner surface of the lower wing plate, each of the groove portions having a groove portion disposed inside the slider width direction. When observing a cross-section of the slide body orthogonal to the height direction of the slide, and defining the outermost position of the slide width direction on the outer periphery of the connecting post as the outermost position, the inner groove side edge of each groove portion is positioned closer to the inner side of the slide width direction than the outermost position, and the outer groove side edge of each groove portion is positioned further away from the outer side of the slide width direction than the outermost position.

[0008] In the slider of the present invention, it is preferable that the pair of groove portions are provided on the inner surface of the upper wing plate and the pair of groove portions are provided on the inner surface of the lower wing plate. Furthermore, it is preferable that each of the above-mentioned groove portions is arranged in a straight line along the length direction of the slide. In this case, it is preferable that the slide 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; and each of the groove portions is disposed separately from the upper flange portions or the lower flange portions on the inner side of the slide body in the width direction.

[0009] In this invention, it is preferable that the inner surface of the upper wing plate and / or the inner surface of the lower wing plate contain the parting line of the mold used to form the slide body, and at least a portion of the parting line is contained within each of the groove portions.

[0010] In this case, preferably, the slide 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 inlet openings on both sides of the connecting post; and an engagement opening at the rear end of the slide body; the parting line has: a first parting line extending from the connecting post on one side of the slide width direction; and a second parting line. It extends from the connecting post on the other side of the width direction of the slide member; the first parting line and the second parting line each have: a first horizontal line extending from the connecting post toward the inlet; a vertical line extending from the front end of the first horizontal line via a bend toward the engagement port; and a second horizontal line extending from the front end of the vertical line on the engagement port side via a bend toward the upper flange or lower flange; each of the above-mentioned groove portions includes at least the entire first horizontal line and the entire vertical line. [Effects of the Invention]

[0011] According to the slider of the present invention, even if the sliding operation is repeated, the zipper teeth are not easily scratched by the inner surface of the slider body. Simple Explanation of the Diagram

[0012] Figure 1 is a side view of the slider according to an embodiment of the present invention. Figure 2 is a front view of the slider shown in Figure 1, viewed from the front. Figure 3 is a cross-sectional view of the upper flange of the slider shown in Figure 1, viewed from below. Figure 4 is a cross-sectional view of the lower flange of the slider shown in Figure 1, viewed from above. Figure 5 is a schematic diagram illustrating the finishing process performed on the main body of the sliding component. Figure 6 is a schematic diagram showing the state in which the tool body of the dressing device is inserted into the slide body. Implementation

[0013] The inventors investigated and studied the phenomenon of zipper teeth being scraped due to the sliding of the slider. As a result, they clarified the following: During the forming of the slider body, due to dimensional errors and positional offsets of the mold used for forming, burrs (residues) protruding from the tooth guide surface are formed on the slider body along the mold parting line. One of the reasons why the zipper teeth are scraped by the slider is that when the slider slides, the zipper teeth moving in the tooth guide path come into contact with the aforementioned burrs.

[0014] Furthermore, the following was also clarified: due to the unique shape of the slide 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 slide body to the outer peripheral surface of the connecting column; and depending on the position and posture of the zipper teeth when they move within the tooth guide path of the slide body, burrs formed on the upper and lower wing plates near the connecting column, and burrs formed on the outer peripheral surface of the connecting column, may also come into contact with the zipper teeth.

[0015] 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 scraped by the slide body when the slide body slides, a groove portion capable of accommodating burrs is provided at an appropriate position and range on the slide body for the parting line (dividing surface) of the mold set on the slide body. Furthermore, by appropriately providing the groove portion, it is also possible to prevent the upper and lower wing plates from being damaged during the finishing process of removing burrs formed on the outer peripheral surface of the connecting column, as described below.

[0016] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 is a side view of the slider of this embodiment. Figure 2 is a front view of the slider of this embodiment. Figures 3 and 4 are cross-sectional views of the upper and lower wing plates of the slider of this embodiment, respectively.

[0017] In the following description relating to the slider 1 and the zipper, the front-back direction refers to the length direction of the slider 1, and is the direction along which the slider 1 slides when it is mounted on the zipper teeth (see Figure 1). In this case, the direction in which the slider 1 moves to engage the zipper teeth is defined as forward (inlet side direction), and the direction in which the slider 1 moves to disengage the zipper teeth is defined as rearward (engagement side direction).

[0018] The vertical direction refers to the height direction of the slider 1, for example, the direction orthogonal to the upper wing plate 20 and lower wing plate 30 of the slider body 10 (see Figures 1 and 2). In this case, the orientation of the mounting tab (not shown) relative to the slider body 10 of the slider 1 is set to upward, and the orientation of its opposite side is set to downward.

[0019] The left and right directions refer to the width direction of the slider 1, and are orthogonal to the length and height directions of the slider 1 (see Figure 2). The inner side of the left and right directions is the direction towards the center line or center plane of the slider body 10 in the left and right directions, and the outer side of the left and right directions is the direction away from the aforementioned center line or center plane.

[0020] The slider 1 of this embodiment is used for a zipper (not shown) having a pair of left and right zipper straps, wherein the pair of left and right zipper straps are fitted with a plurality of zipper teeth on the zipper fabric. In this case, although the illustration is omitted, the zipper has: a pair of left and right zipper straps; a slider 1, which is mounted on the rows of teeth of the zipper straps; a first stop member, which is disposed adjacent to the front end of each row of teeth on the left and right; and a second stop member, which is disposed adjacent to the rear end of each row of teeth on the left and right.

[0021] Each zipper belt on the left and right sides has a woven, thin strip of zipper fabric and a plurality of metal zipper teeth mounted on the opposite side edges of the zipper fabric. Each zipper tooth has: a tooth head with an engaging protrusion and an engaging recess; and a pair of tooth feet that split into two strands from the tooth head and extend in a left-right direction. The plurality of zipper teeth mounted on the zipper fabric form a continuous row of teeth along the length of the zipper fabric. The first stop member and the second stop member are respectively provided adjacent to the front end and the rear end of the chain tooth row to prevent the slide member 1 from falling off the chain tooth row.

[0022] Furthermore, as long as the zipper teeth are made of metal, the zipper belt in this embodiment is not particularly limited. The shape and size of the first stop member and the second stop member are also not limited. The zipper may be formed without providing at least one of the first stop member and the second stop member, or a detachable insert may be provided to replace the second stop member to form the zipper.

[0023] In this embodiment, the slider 1 is installed on the tooth rows of the left and right zipper belts. The slider 1 can slide along the tooth rows in the direction of engagement (front) and the direction of disengagement (rear).

[0024] The slider 1 is formed by two parts: a slider body 10 and a pull tab (not shown). The slider body 10 is manufactured by die casting metals such as aluminum alloy and zinc alloy. Furthermore, in this invention, there are no particular limitations on the material or manufacturing method of the slider body.

[0025] A pull tab (not shown) may include, for example, a pull tab body portion that serves as a gripping 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 front ends of the arms. Pull tabs similar to those commonly used previously may be used. Furthermore, in this invention, the shape, structure, size, and material of the pull tab are not particularly limited as long as it is formed to be mounted on the slide body as described above.

[0026] The slider body 10 of this embodiment has a shape that is symmetrical about the center line in the left-right direction of the slider body 10. The slider 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 ends of the upper wing plate 20 and 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.

[0027] Here, in the slider body 10 of this embodiment, when observing a 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, Figures 3 and 4), the outermost position of the slider width direction on the outer periphery of the connecting column 40 is defined as the outermost position 41 of the connecting column 40.

[0028] The upper flange portion 11 of the slider body 10 has: a flange parallel portion 13 that extends along the front-back direction with a fixed interval between the left and right upper flange portions 11; and a flange curved portion 14 that extends forward from the front end of the flange parallel portion 13, and the interval between the left and right upper flange portions 11 gradually increases forward (see Figure 3).

[0029] 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 fixed 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 gradually increases forward (see Figure 4). Furthermore, the spacing between the left and right upper flange portions 11 and the spacing between the left and right lower flange portions 12 refer to the distance in the left-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.

[0030] Here, for the upper flange portion 11 and the lower flange portion 12, the position in the front-to-back direction between the flange parallel portion 13 and the flange curved portion 14 is defined as the boundary position 15. In the slider body 10 of this embodiment, the boundary position 15 of the upper flange portion 11 and the boundary position 15 of the lower flange portion 12 are arranged at the same position in the front-to-back direction of the slider body 10.

[0031] A pair of left and right guide ports 18 are formed at the front end of the slider body 10, opening on the left and right sides of the connecting post 40. A rearward-opening engagement port 19 is formed at the rear end of the slider body 10. The engagement port 19 is surrounded by an upper wing plate 20, a lower wing plate 30, left and right upper flange portions 11, and left and right lower flange portions 12. A Y-shaped chain tooth guide path is formed between the upper wing plate 20 and the lower wing plate 30, connecting the left and right guide ports 18 and the engagement port 19. On the left and right side edges of the slider body 10, a zipper insert gap is formed between the upper flange portion 11 and the lower flange portion 12 for the zipper fabric (not shown) to be inserted. The zipper insert gap communicates with the chain tooth guide path.

[0032] The inner surface of the slider 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 slider body 10. The tooth guide surface includes an upper tooth guide surface 21 provided on the inner surface of the upper wing plate 20, a lower tooth guide surface 31 provided on the inner surface of the lower wing plate 30, the inner surfaces of the upper flange portions 11 on the left and right sides, and the inner surfaces of the lower flange portions 12 on the left and right sides.

[0033] The upper wing plate 20 is provided with: 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 is provided with: 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.

[0034] For example, as shown in Figure 3, 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 equally disposed at the ends of the left and right inlet ports 18; an upper reference inclined portion 26, which is disposed 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 guide. Furthermore, the inner surface 21 of the upper wing plate has an upper rear inclined portion 28 disposed at the end (rear end) of the engagement port 19 side, and a pair of upper groove portions 50 that are recessed relative to the upper main plane 24.

[0035] Furthermore, in this invention, the ends of the upper wing plate inner surface 21 and the lower wing plate inner surface 31 on the side of the inlet 18 (sometimes also referred to as the inlet-side ends) are the portions of the upper wing plate 20 or the lower wing plate 30 extending inward from the inlet 18 of the slider body 10 toward the chain tooth guide path. Also, the inlet-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 inlet 18 and its surrounding area. The ends of the upper wing plate inner surface 21 and the lower wing plate inner surface 31 on the side of the engagement port 19 (sometimes also referred to as the engagement port-side ends) are the portions of the upper wing plate 20 or the lower wing plate 30 extending inward from the engagement port 19 toward the chain tooth guide path. Also, the engagement port-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 engagement port 19 and its surrounding area.

[0036] The upper main plane 24 of the upper wing plate 20 is formed by a flat surface orthogonally arranged to the vertical direction. When viewing the inner surface 21 of the upper wing plate from below (see Figure 4), the upper main plane 24 is located in the front end position of the left and right upper flange portion 11 and the upper rear inclined portion 28 in the front-back direction, and in the left-right direction, it is located between the left and right upper flange portions 11.

[0037] 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 further outward 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 24, together with the lower main plane 34 of the lower wing plate 30, can stably support the meshing left and right zipper teeth in the vertical direction within the zipper tooth guide path of the slide body 10.

[0038] The upper forward inclined portions 25 are disposed on the left and right inlet-side ends of the inner surface 21 of the upper wing plate. The upper forward inclined 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 the zipper teeth entering the zipper guide path from the inlet 18 of the slide body 10 and for the zipper teeth moving towards the inlet 18. The left and right upper forward inclined portions 25 have a mutually symmetrical shape. Each upper forward inclined portion 25 has an inclined surface that is inclined towards the inlet 18 to reduce the thickness of the upper wing plate 20. Here, 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.

[0039] When viewing the upper wing plate 20 from below (see Figure 3), upper reference inclined portions 26 are provided on both sides of the upper forward inclined portion 25. These upper reference inclined portions 26 are inclined in such a way that the thickness of the upper wing plate 20 is reduced by moving towards the inlet 18. The upper reference inclined portion 26 has a first upper reference inclined portion 26a disposed between the upper forward inclined portion 25 and the connecting post 40, and a second upper reference inclined portion 26b disposed between the upper forward 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 forward inclined portion 25 is provided separately from the connecting post 40 and the upper flange portion 11, respectively.

[0040] 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.

[0041] By having the shape described above, the upper reference inclined portion 26 can stably contact at least one of the upper reference inclined portions 26 when the zipper teeth move within the tooth guide path of the slide body 10, for example, when one side of the zipper teeth contacts the inner surface 21 of the upper wing plate. Furthermore, at least a portion of the zipper teeth can be moved away from the upper forward inclined portion 25, thereby forming a non-contact portion that does not contact the inner surface 21 of the upper wing plate on at least a portion of the zipper teeth.

[0042] Therefore, when the slider 1 slides, within the tooth guide path of the slider body 10, the zipper teeth can be maintained in an appropriate posture by means of the upper reference inclined portion 26, while the zipper teeth can move forward or backward. At the same time, at least a portion of the zipper teeth can be made to be 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 inlet side end of the inner surface 21 of the upper wing plate when the slider 1 slides, the zipper teeth are less likely to be scraped by the upper wing plate 20.

[0043] The upper left and right sides of the upper wing plate 20 have stepped receiving portions 27 for inserting and receiving the first stop member when the slider 1 stops against the first stop member of the zipper. The upper left and right sides of the stepped receiving portions 27 have a flat upper step surface 27a and an upper connecting surface 27b, respectively.

[0044] The upper stepped surface 27a of the upper receiving stepped portion 27 is formed by a plane orthogonal to the vertical direction. The upper stepped surface 27a is positioned inside the chain tooth entry direction, closer to the upper forward inclined portion 25, and is formed adjacent to the upper forward inclined portion 25. Here, the chain tooth entry direction is the direction from the inlet 18 toward the interior of the chain tooth guide path, for example, the direction from the inlet 18 toward the midpoint between the connecting post 40 and the upper flange portion 11.

[0045] 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.

[0046] 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 side of the engagement opening 19. 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 engagement opening 19 to reduce the thickness of the upper wing plate 20. Furthermore, 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 guide). In this embodiment, the inclined surface of the upper rearward inclined portion 28 is formed as a convex curved surface throughout the entire front-rear direction of the upper rearward inclined portion 28.

[0047] By providing this upper rearward tilted portion 28, when the slider 1 slides, even if the zipper teeth come into contact with the meshing end of the inner surface 21 of the upper wing plate, it can prevent or suppress the strong friction between the zipper teeth and the upper rearward tilted portion 28, so that the zipper teeth are not easily scraped by the upper wing plate 20.

[0048] 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 in a way that overlaps with a portion of the connecting post 40 in the left-right direction.

[0049] 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 on the inner side in the left-right direction. By arranging the upper groove portions 50 on the left and right sides in this manner, the aforementioned central plane 24a and side plane 24b of the upper main plane 24 can be stably set.

[0050] Each upper groove portion 50 has: a groove bottom 51 having a flat surface; and a pair of groove side edges 52, which are disposed on the left and right sides of the groove bottom 51. The groove side edges 52 have: an inner groove side edge 52a, which is disposed on the inner side further to the left and right in the left and right direction than the groove bottom 51; and an outer groove side edge 52b, which is disposed on the outer side further to the left and right in the left and right direction than the groove bottom 51.

[0051] The bottom 51 of the upper recess 50 is positioned vertically further away from the lower main plane 34 of the lower wing plate 30 than the upper main plane 24 of the upper wing plate 20 (i.e., higher than the upper main plane 24). The left-right dimension (width dimension) of the bottom 51 is set to a fixed size across the entire front-back direction of the bottom 51, except for the area (part) where the connecting column 40 is formed.

[0052] When viewed in cross-section from below, each upper groove 50, except for the area (partial) where the connecting post 40 is formed, has a generally rectangular shape that is continuous from the inlet 18 side to the engagement 19 side of the upper wing 20 in the front-rear direction. Specifically, in this embodiment, each upper groove 50 is continuously formed from a position further forward than the outermost position 41 of the connecting post 40 to a position further rearward than 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.

[0053] The bottom 51 of the upper recess 50 is formed in a manner that is smoothly continuous 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. Here, 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.

[0054] By making the groove depth of the upper recess 50 0.01 mm or more, even if burrs are formed along the upper parting line 70 below the upper flange 20 during the molding of the slide body 10, the burrs can be contained within the upper recess 50, preventing or suppressing the burrs from protruding beyond the upper main plane 24. By making the groove depth 0.1 mm or less, even if the upper recess 50 is provided on the inner surface 21 of the upper flange, the upper recess 50 can be made less conspicuous, thereby preventing a decrease in the appearance quality of the slide body 10. Furthermore, the strength of the upper flange 20 can be reliably ensured.

[0055] Each upper groove 50 has a bottom 51 that is 10% to 40% of the distance between the parallel flange portions 13 of the upper flange portions 11 in the left-right direction. By making the bottom 51 of the groove 51 more than 10% of the distance between the parallel flange portions 13, it is easy to set the upper parting line 70 of the mold in the upper groove 50. By making the bottom 51 of each groove less than 40% of the distance 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 slide body 10 can be stably guided by the upper wing plate 20.

[0056] The first bottom surface 53 of the groove bottom 51 is continuously formed in the front-rear direction from a position further forward than the outermost position 41 of the connecting column 40 to a position further rearward than the boundary 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 column 40 to the boundary between the upper main plane 24 and the upper rearward inclined portion 28. Therefore, as described below, it is easy to set the upper parting line 70 of the mold for forming the sliding body 10 to be longer in the upper groove portion 50 (especially the first bottom surface 53 of the groove bottom 51).

[0057] The second bottom surface 54 of the groove bottom 51 has an inclined surface that slopes in such a way that the thickness of the upper wing plate 20 gradually decreases rearward. In other words, the inclined surface of the second bottom surface 54 slopes in such a way that the dimension in the vertical direction from the position of the lower wing plate 30 under the main plane 34 to the second bottom surface 54 of the upper wing plate 20 gradually increases rearward. This inclined surface is preferably a curved surface that curves upward into a convex shape. In this embodiment, the second bottom surface 54 is formed entirely by a convex curved surface in the front-to-back direction.

[0058] By providing a second bottom surface 54 to the bottom 51 of the upper recess 50, no step difference or unevenness is 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. This allows the bottom 51 of the recess to be smoothly continuous with the inclined surface of the upper rearward inclined portion 28 in the front-back direction. Therefore, even with the upper recess 50 provided, it is not easily noticeable, thus preventing or suppressing a decrease in the appearance quality of the slide 1. Furthermore, the thickness of the upper wing plate 20 can be appropriately ensured at its rear end, thus preventing a decrease in strength due to the provision of the upper recess 50.

[0059] The inner groove edge 52a of each upper groove portion 50 is disposed further in the left-right direction than the outermost position 41 of the connecting post 40. The outer groove edge 52b of each upper groove portion 50 is disposed further in the left-right direction than the outermost position 41 of the connecting post 40. That is, the regions forming each upper groove portion 50 in the left-right direction are respectively provided such that at least a portion of the outer peripheral surface of the connecting post 40 (specifically, at least a portion of the side wall surface of the outer peripheral surface of the connecting post 40 facing the left-right direction) 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 post 40 is disposed between the inner groove edge 52a and the outer groove edge 52b.

[0060] As shown in Figure 3, the upper wing plate 20 has an upper parting line 70 on the inner surface 21 of the upper wing plate 20, which is used to form the mold (sliding core) for the sliding body 10. 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 width direction of the sliding part; and an upper second parting line 72, which extends from the connecting post 40 on the right side (the other side) in the width direction of the sliding part.

[0061] The upper first parting line 71 and the upper second parting line 72 each have: an upper first horizontal line 73, which extends from the outer peripheral surface of the connecting post 40 toward the inlet 18; an upper vertical line 74, which extends from the front end of the upper first horizontal line 73 through a bend toward the engagement port 19; and an upper second horizontal line 75, which extends from the front end of the upper vertical line 74 on the engagement port 19 side through a bend toward the upper flange portion 11.

[0062] 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. The upper longitudinal line 74 extends in a straight line from the front end 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 further to the left and right than its front end.

[0063] The second horizontal line 75 on the upper side extends outward in the left and right directions from the rear end of the upper vertical line 74 (the boundary position 15 between the parallel part of the flange 13 and the curved part of the flange 14), and connects to the inner wall surface of the upper flange 11. In this embodiment, the entire upper first parting line 71 and the upper second parting line 72 are respectively set in the upper groove portion 50, the entire upper first horizontal line 73, the entire upper vertical line 74, and a portion of the upper second horizontal line 75.

[0064] For example, as shown in Figure 4, 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 disposed at the ends of the left and right inlet ports 18; a lower reference inclined portion 36, which is disposed 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 guide. Furthermore, the inner surface 31 of the lower wing plate has: a lower rear inclined portion 38, which is disposed at the end (rear end) of the engagement port 19; and a pair of lower groove portions 60, which are recessed relative to the lower main plane 34.

[0065] 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 further to the left and right sides of the lower recesses 60. By providing the aforementioned upper main plane 24 and lower main plane 34, although the upper recesses 50 and lower recesses 60 are respectively disposed 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 feet from the vertical direction. Therefore, the left and right zipper teeth can move in an appropriate posture within the tooth guide path of the slide body 10.

[0066] The lower forward inclined portions 35 are disposed on the left and right inlet-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 the zipper teeth entering the zipper guide path from the inlet 18 of the slide body 10 and for the zipper teeth moving towards the inlet 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 is inclined towards the inlet 18 to reduce the thickness of the lower wing plate 30. Here, 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.

[0067] When viewing the lower wing plate 30 from above (see Figure 4), lower reference inclined portions 36 are provided on both sides of the lower forward inclined portion 35. These lower reference inclined portions 36 are inclined in a manner that reduces the thickness of the lower wing plate 30 by moving towards the inlet 18. The lower reference inclined portions 36 include: a first lower reference inclined portion 36a, which is disposed between the lower forward inclined portion 35 and the connecting post 40; and a second lower reference inclined portion 36b, which is disposed between the lower forward 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 forward inclined portion 35 is separately disposed from the connecting post 40 and the upper flange portion 11, respectively.

[0068] The lower reference inclined portion 36 is formed to bulge upward or protrude upward 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.

[0069] By having the shape described above for the lower reference inclined portion 36, when the zipper teeth move within the tooth guide path of the slider body 10, for example, when one side of the zipper teeth contacts 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 on at least a portion of the zipper teeth, similar to the case of the upper wing plate 20. Therefore, even if the zipper teeth contact the inlet-side end of the inner surface 31 of the lower wing plate when the slider 1 slides, the zipper teeth are less likely to be scratched.

[0070] The lower left and right side receiving step portions 37 and the lower rearward tilting portions 38 in the lower wing plate 30 are formed in the same way as the upper left and right side receiving step portions 27 and the upper rearward tilting 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.

[0071] The lower rearward inclined portion 38 of the lower wing plate 30 is provided at the end of the engagement port 19 on the inner surface 31 of the lower wing plate. The inclined surface of the lower rearward inclined portion 38 has a convex curved surface that is curved in a convex shape in the front-to-back direction of the lower rearward inclined portion 38 and bulges out toward the upper wing plate 20.

[0072] Each of the two 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 overlap a portion of the connecting post 40 in the left-right direction. The two 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.

[0073] When viewed in cross-section from above, each lower groove 60, except for the area (partial) where the connecting post 40 is formed, has a generally rectangular shape that runs continuously from the inlet 18 side to the engagement 19 side of the lower wing 30. Specifically, in this embodiment, each lower groove 60 extends continuously from a position further forward than the outermost position 41 of the connecting post 40 to a position further rearward than the boundary between the lower main plane 34 and the lower rearward inclined portion 38. In this embodiment, one pair of lower grooves 60 in the lower wing 30 are correspondingly positioned in the left-right direction at the same positions as one pair of upper grooves 50 in the upper wing 20.

[0074] When forming the slide body 10 using a mold, as described below, 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 sliding cores at the front and rear of the mold. Since 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 as described above, by using the front and rear sliding cores, a pair of upper groove portions 50 and a pair of lower groove portions 60 can be stably and smoothly formed on the left and right sides of the connecting post 40 in the slide body 10 without undercutting.

[0075] Each lower recess 60 has: a recess bottom 61 having a flat surface; and a pair of recess side edges 62, which are 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 further to the left and right in the left and right direction than the recess bottom 61, and an outer recess side edge 62b disposed on the outer side further to the left and right in the left and right direction than the recess bottom 61.

[0076] The bottom 61 of the lower groove portion 60 is positioned vertically further away from the upper main plane 24 of the upper wing plate 20 than the lower main plane 34 of the lower wing plate 30 (i.e., lower than the lower main plane 34). When viewed in cross-section from above, the bottom 61 of the groove of the lower wing plate 30, except for the area (partial) where the connecting post 40 is formed, has a generally rectangular shape that is longer in the front-back direction. The left-right dimension (width dimension) of the bottom 61 and the front-back dimension of the bottom 61 are set to a fixed size. The bottom 61 is formed in a manner that is smoothly continuous with the first lower reference inclined portion 36a provided in front of the bottom 61.

[0077] 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 a manner similar to the groove depth of the upper recess 50. Here, 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.

[0078] Each lower groove 60 has a bottom 61 with a size in the left-right direction that is more than 10% and less than 40% of the interval between the parallel flange portions 13 of the 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 allowing the zipper teeth passing through the zipper tooth guide path of the slide body 10 to be stably guided by the lower wing plate 30.

[0079] 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 column 40 to a position further rearward than the boundary between the lower main plane 34 and the lower rear inclined portion 38. In other words, the first bottom surface 63 of the groove bottom 61 is formed in a longer range in the front-rear direction than the range from the outermost position 41 of the connecting column 40 to the boundary between the lower main plane 34 and the lower rear inclined portion 38.

[0080] The second bottom surface 64 of the groove bottom 61 is formed by an inclined surface that gradually decreases in thickness towards the rear. In other words, the inclined surface of the second bottom surface 64 is inclined such that the dimension in the vertical direction 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 gradually increases towards the rear. This inclined surface is preferably a curved surface that curves upward into a convex shape. In this embodiment, the second bottom surface 64 is formed entirely by a convex curved surface in the front-to-back direction. By providing this second bottom surface 64 in 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. Furthermore, it is possible to prevent a reduction in strength at the rear end of the lower wing plate 30 due to the provision of the lower groove portion 60.

[0081] The inner groove edge 62a of each lower recess 60 is positioned further in the left-right direction than the outermost position 41 of the connecting post 40. The outer groove edge 62b of each lower recess 60 is positioned further in the left-right direction than the outermost position 41 of the connecting post 40. The regions forming the left-right directions of each lower recess 60 are respectively provided such that at least a portion of the outer peripheral surface of the connecting post 40 (specifically, at least a portion of the sidewall surface of the outer peripheral surface of the connecting post 40 facing the left-right direction) is disposed between the inner groove edge 62a and the outer groove edge 62b. In particular, each lower recess 60 is disposed such that the outermost position 41 of the connecting post 40 is disposed between the inner groove edge 62a and the outer groove edge 62b.

[0082] As shown in Figure 4, the lower wing plate 30 contains a lower parting line 80 on the inner surface 31 of the lower wing plate 30, which is used for forming the mold (sliding core) of the slide body 10. The lower parting line 80 is substantially the same as the upper parting line 70 set 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 slide 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 slide width direction.

[0083] 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 inlet 18; a lower vertical line 84 extending from the front end of the lower first horizontal line 83 via a bend toward the engagement port 19; and a lower second horizontal line 85 extending from the front end of the lower vertical line 84 on the engagement port 19 side via a bend toward the upper flange portion 11. 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 disposed within the lower recess portion 60.

[0084] When the connecting post 40 is cut in a cross-section at the center position of the connecting post 40 in the vertical direction orthogonal to the vertical direction (see, for example, Figures 3 and 4), the connecting post 40 of the slider body 10 has a front end 42 facing forward, an arc-shaped rear end face 43 facing the engagement port 19, and a pair of left and right sidewalls 44 disposed between the front end 42 and the rear end face 43.

[0085] In the above cross-sectional view, the connecting column 40 has a front increasing portion 45 that gradually increases the distance between the left and right column sidewalls 44 towards the rear, and a rear decreasing portion 46 that gradually decreases the distance between the left and right column sidewalls 44 towards the rear. 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 set in the portion of the column sidewall 44 of the connecting column 40 located between the front increasing portion 45 and the rear decreasing portion 46. The outermost position 41 may also extend across a specific range formed along the front-rear direction.

[0086] Next, the method for manufacturing the slider 1 of this embodiment will be described. First, the slider body 10 and the pull tab (not shown) of the slider 1 are manufactured separately. Furthermore, in this invention, the manufacturing method of the pull tab is not particularly limited.

[0087] The slider body 10 is manufactured by die casting metal using a mold (not shown) for the slider body 10. In this case, the mold has a mold body and sliding cores disposed in a pluggable manner at the front and rear of the mold body. The sliding cores at the front and rear of the mold form the chain guide path, a pair of upper groove portions 50, and a pair of lower groove portions 60 of the slider body 10.

[0088] The mold parting lines in the mold, which indicate the division positions of the front and rear sliding cores, include an upper parting line 70 for the inner surface 21 of the upper wing plate 20 and a lower parting line 80 for the inner surface 31 of the lower wing plate 30 (see Figures 3 and 4). Furthermore, in this invention, the position and length of the mold parting lines other than the upper parting line 70 and the lower parting line 80 are not particularly limited.

[0089] The slide body 10 is formed by die casting using a mold with an upper parting line 70 and a lower parting line 80, as shown in Figures 3 and 4. The slide body 10 has the shape of the pull tab mounting part 17 before the pull tab is installed. At this time, burrs may sometimes form along the parting line of the mold due to dimensional errors or positional offsets of the mold.

[0090] Therefore, in this embodiment, after the die-casting process of the slide body 10, a trimming device with trimming cutters 90 (sometimes also called trimmers) as shown in Figures 5 and 6 is used to perform a trimming process (trimming process) inside the slide body 10 (inside the chain guide path). This trimming process (trimming process) removes 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 column 40.

[0091] The trimming tool 90 shown in Figures 5 and 6 is arranged in a manner that allows it to move relative to the slide body 10 in the front-back direction, and is configured such that a portion of the trimming tool 90 can be inserted from the engagement port 19 of the slide body 10 into the chain tooth guide path and chain cloth insertion gap of the slide body 10.

[0092] The dressing tool 90 has: a tool body portion 91, which is inserted into the chain tooth guide path of the slide body 10; and an opening portion 92, which is formed from the front end of the tool body portion 91 toward the rear. When the tool body portion 91 is inserted into the slide body 10, the connecting post 40 of the slide body 10 is inserted into the opening portion 92 of the dressing tool 90.

[0093] The thickness between the upper and lower surfaces of the tool 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 slide body 10. The maximum value of the left-right dimension at the opening 92 of the tool body 91 is set to be the same as the maximum value of the left-right dimension of the connecting post 40 of the slide body 10 (i.e., the left-right dimension of the outermost position 41 of the connecting post 40).

[0094] In the trimming process, firstly, the slide body 10, which is to be processed, is placed and fixed in the slide fixing part (not shown) of the trimming device. Then, the trimming tool 90 is inserted into the chain guide path from the engagement port 19 of the slide body 10 fixed in the slide fixing part.

[0095] Therefore, when forming the main body 10 of the sliding part, 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, the burrs can be removed by the tool body portion 91 of the dressing tool 90.

[0096] For example, when viewed from the front, the tool body 91 has four corner portions 93 adjacent to the opening 92, and the portion of the tool body 91 including the four corner portions 93 can be used to remove burrs formed along the outermost position 41 of the connecting post 40. Furthermore, when the tool body 91 of the trimming tool 90 is inserted into the slide body 10, when viewed from the front, the slide body 10 and the tool body 91 can be seen on the outer side of each corner portion 93 in the vertical direction, with the gap formed by the upper groove portion 50 and the lower groove portion 60 visible (see Figure 6).

[0097] On the other hand, during the trimming process of the slide body 10, when the slide body 10 is fixed to the slide fixing part of, for example, the trimming device, the following situations occur: the posture of the slide body 10 is slightly tilted relative to the posture suitable for trimming; and a dimensional error occurs between the slide body 10 and the tool body 91 of the trimming tool 90.

[0098] Here, for example, we will describe the case where the upper wing inner surface 21 and the lower wing inner surface 31 of the slide body 10 do not have the upper groove 50 and lower groove 60 as in this embodiment. In this case, for example, when the tool body 91 is inserted into the slide body 10 which is fixed in a slightly tilted position, and when the tool body 91 is inserted into the slide body 10 with a dimensional error between the slide body 10 and the tool body 91, the following undesirable situation occurs: at least one of the four corner portions 93 of the tool body 91 scrapes the upper wing inner surface 21 and / or the lower wing inner surface 31 of the slide body 10, causing damage to them.

[0099] In contrast, as described above, the slider body 10 of this embodiment has a pair of upper groove portions 50 formed on the inner surface 21 of the upper wing plate and a pair of lower groove portions 60 formed on the inner surface 31 of the lower wing plate. Furthermore, the inner groove edge portion 52a of each upper groove portion 50 and the inner groove edge portion 52a of each lower groove portion 60 are positioned further inward in the left-right direction than the outermost position 41 of the connecting post 40. Moreover, the outer groove edge portion 52b of each upper groove portion 50 and the outer groove edge portion 52b of each lower groove portion 60 are positioned further outward in the left-right direction than the outermost position 41 of the connecting post 40.

[0100] Therefore, even when the slide fixing part of the trimming device is fixed in a slightly tilted position, and even if there is a dimensional error between the slide body 10 and the tool body 91, when the tool body 91 of the trimming tool 90 is inserted into the slide body 10, the corner 93 of the tool body 91 can pass through the area where the upper groove 50 and the lower groove 60 are formed in the left and right direction of the slide body 10.

[0101] As a result, the corner 93 of the tool body 91 can move in the front-back direction in such a way that the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate of the slide 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 surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate of the slide body 10 and damaging these inner surfaces.

[0102] For the slide body 10 that has undergone finishing, a separately prepared pull tab (not shown) is then combined with the pull tab mounting portion 17 of the slide body 10 and held in the pull tab mounting portion 17. Then, the pull tab mounting portion 17 is plastically deformed in the direction close to the upper flange 20 so that the pull tab does not fall off from the pull tab mounting portion 17. In this way, the slide 1 of this embodiment, in which the pull tab is mounted on the slide body 10, is manufactured. Furthermore, the manufactured slide 1 is slidably mounted on the chain teeth of the left and right zipper belts, thereby forming a zipper.

[0103] According to the slider 1 of this embodiment as described above, a pair of upper groove portions 50 along the front-rear direction are formed on the inner surface 21 of the upper wing plate 20, and a pair of lower groove portions 60 along the front-rear direction are formed on the inner surface 31 of the lower wing plate 30. Furthermore, an upper parting line 70 is provided in the upper groove portion 50 of the upper wing plate 20, and a lower parting line 80 is provided in the lower groove portion 60 of the lower wing plate 30.

[0104] 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 slider 1, the burrs can be contained in the upper groove 50 and the lower groove 60, preventing or suppressing the burrs from protruding further into the zipper tooth guide path than the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate. Therefore, even if the slider 1 of this embodiment is used in a zipper and the sliding operation of the slider 1 is repeatedly performed, the burrs formed on the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate are less likely to come into contact with the zipper teeth.

[0105] 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 slider body 10 will cause the zipper teeth to be scratched. As a result, even with repeated sliding operations of the slider 1, the appearance quality of the zipper is less likely to be reduced due to the exposure of the metal part inside the zipper teeth. Therefore, the aesthetics of the zipper can be easily maintained for a long time.

[0106] 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 to the finishing device in a slightly tilted position, it is possible to prevent or suppress the finishing tool 90 of the finishing device from damaging the inner surface 21 of the upper flange and the inner surface 31 of the lower flange of the slider body 10. Therefore, the yield of the slider 1 can be improved.

[0107] Furthermore, the present invention is not limited to the embodiments described above. Various modifications can be made as long as the invention has the same structure and performs the same function.

[0108] For example, in the above embodiment, an upper groove 50 and a lower groove 60 are respectively provided on the upper wing plate 20 and lower wing plate 30 of the slider body 10. However, in the present invention, the slider body may also be formed by providing a groove on only one of the upper wing plate and the lower wing plate.

[0109] Furthermore, in the above embodiment, the upper groove 50 of the upper wing plate 20 and the lower groove 60 of the lower wing plate 30 are respectively formed as straight lines extending directly 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 also 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. Furthermore, 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 gradually increases or decreases rearward.

[0110] Furthermore, in this invention, the position of the parting line (upper parting line and lower parting line) of the mold for the sliding body is not particularly limited as long as a portion of the parting line is included in at least a portion of the upper groove of the upper wing plate and the lower groove of the lower wing plate.

[0111] In the above embodiments, the case where the slider 1 is used for a zipper (metal zipper) having a plurality of metal zipper teeth has been described. However, the slider of the present invention can also be used for zippers with a plurality of zipper teeth other than metal zipper teeth installed on the zipper fabric (i.e., zippers other than metal zippers).

[0112] 1: Sliding parts 10: Sliding body 11: Upper flange 12: Lower flange 13: Parallel portion of the flange 14: Flange bending section 15: Boundary Location 17: Tape Installation Section 18: Inlet Port 19: Engagement joint 20: Upper Wing 21: Inner surface of the upper wing plate (upper chain tooth guide surface) 22: Outer surface of the upper wing (upper surface of the upper wing) 23: Outer circumference of the upper wing plate 24: Upper Main Plane 24a: Central Plane 24b: Lateral plane 25: Upper forward tilt section 26: Upper reference inclined part 26a: First upper reference inclined part 26b: Second upper reference inclined part 27: Upper side receiving step difference section 27a: Upper side step difference surface 27b: Upper connecting surface 28: Upper rearward tilt section 30: Lower wing plate 31: Inner surface of the lower wing plate (lower chain tooth guide surface) 32: Outer surface of the lower wingplate (lower surface of the lower wingplate) 33: Outer circumference of the lower wing plate 34: Lower Main Plane 34a: Central Plane 34b: Lateral plane 35: Lower front tilt section 36: Lower reference inclined part 36a: First lower reference inclined part 36b: Second lower reference inclined part 37: Lower side receiving step section 37a: Lower side step difference surface 37b: Lower connecting surface 38: Lower rearward tilt section 40: Connecting Post 41: Outermost position 42: Front end of column 43: Rear end face of the column 44: Column side wall surface 45: Front increasing section 46: Rear Decreasing Section 50: Upper groove portion 51: Bottom of the tank 52: Side edge of the groove 52a: Side edge of the inner groove 52b: Side edge of the outer groove 53: First bottom surface 54: Second bottom surface 60: Lower side groove 61: Bottom of the tank 62: Side edge of the groove 62a: Side edge of the inner groove 62b: Side edge of the outer groove 63: First bottom surface 64: Second bottom surface 70: Upper parting line 71: First parting line on the upper side 72: Second parting line on the upper side 73: The first horizontal line on the top side 74: Upper vertical line 75: The second horizontal line on the top side 80: Lower parting line 81: First parting line on the lower side 82: Second parting line on the lower side 83: The first horizontal line on the bottom 84: Lower vertical line 85: The second horizontal line on the bottom 90: Dressing tools 91: Tool Body 92: Opening 93: Corner

Claims

1. A slider for zippers having a slider body (10), the slider body (10) having: 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) and the front end of the lower wing plate (30); the slider is characterized in that: a pair of groove portions (50, 60) disposed separately from each other in the slider width direction 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) having an inner groove side edge portion (52a) disposed inside the slider width direction and an outer groove side edge portion (52b) disposed outside the slider width direction. When observing a cross-section of the slide body (10) orthogonal to the height direction of the slide, if the outermost position of the slide width direction on the outer periphery of the connecting post (40) is defined as the outermost position (41), the inner groove side edge (52a) of each groove (50, 60) is positioned closer to the inner side of the slide width direction than the outermost position (41), and the outer groove side edge (52b) of each groove (50, 60) is positioned further to the outer side of the slide width direction than the outermost position (41); a portion of the connecting post (40) is included inside each of the grooves (50, 60).

2. The slider as claimed in claim 1, wherein the pair of grooves (50) are provided on the inner surface of the upper wing plate (20) and the pair of grooves (60) are provided on the inner surface of the lower wing plate (30).

3. The slider as requested in item 1, wherein each of the above-mentioned groove portions (50, 60) is arranged in a straight line along the length direction of the slider.

4. The slider as claimed in claim 1, wherein the slider body (10) has: a pair of upper flange portions (11) extending from the side edge of the upper wing plate (20) toward the lower wing plate (30); and a pair of lower flange portions (12) extending from the side edge of the lower wing plate (30) toward the upper wing plate (20); and each of the groove portions (50, 60) is disposed separately from the upper flange portion (11) or the lower flange portion (12) on the inner side of the slider in the width direction.

5. The slider as claimed in claim 1, wherein the inner surface of the upper wing plate (20) and / or the inner surface of the lower wing plate (30) contains the parting lines (70, 80) of the mold used to form the slider body (10), and at least a portion of the parting lines (70, 80) is contained within each of the groove portions (50, 60).

6. The slider as claimed in claim 5, wherein the slider body (10) has: a pair of upper flange portions (11) extending from the side edge of the upper wing plate (20) toward the lower wing plate (30); a pair of lower flange portions (12) extending from the side edge of the lower wing plate (30) toward the upper wing plate (20); a pair of inlet ports (18) opening on both sides of the connecting post (40); and a meshing port (19) opening at the rear end of the slider 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) respectively have: a first horizontal line (73, 83) extending from the connecting post (40) toward the inlet (18); a vertical line (74, 84) extending from the front end of the first horizontal line (73, 83) via a bend toward the engagement port (19); and a second horizontal line (75, 85) extending from the front end of the vertical line (74, 84) on the engagement port (19) side via a bend toward the upper flange (11) or the lower flange (12); and each of the above-mentioned groove portions (50, 60) includes at least the entire first horizontal line (73, 83) and the entire vertical line (74, 84).

Images