EP2793634A1 - Fastener element for a slide fastener, and methods for the manufacture thereof - Google Patents
Fastener element for a slide fastener, and methods for the manufacture thereofInfo
- Publication number
- EP2793634A1 EP2793634A1 EP11802100.5A EP11802100A EP2793634A1 EP 2793634 A1 EP2793634 A1 EP 2793634A1 EP 11802100 A EP11802100 A EP 11802100A EP 2793634 A1 EP2793634 A1 EP 2793634A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fastener element
- protrusion
- fastener
- element according
- tape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 230000008878 coupling Effects 0.000 claims abstract description 36
- 238000010168 coupling process Methods 0.000 claims abstract description 36
- 238000005859 coupling reaction Methods 0.000 claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 8
- 238000004080 punching Methods 0.000 claims description 5
- 238000009751 slip forming Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- 230000003466 anti-cipated effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000004512 die casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/02—Slide fasteners with a series of separate interlocking members secured to each stringer tape
- A44B19/04—Stringers arranged edge-to-edge when fastened, e.g. abutting stringers
- A44B19/06—Stringers arranged edge-to-edge when fastened, e.g. abutting stringers with substantially rectangular members having interlocking projections and pieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/46—Making other particular articles haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples
- B21D53/50—Making other particular articles haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples metal slide-fastener parts
- B21D53/52—Making other particular articles haberdashery, e.g. buckles, combs; pronged fasteners, e.g. staples metal slide-fastener parts fastener elements; Attaching such elements so far as this procedure is combined with the process for making the elements
Definitions
- the present invention relates to a fastener element for a slide fastener, and methods for the manufacture thereof.
- the present invention relates to a fastener element comprising a metal body having a coupling portion and a tape-retaining portion, wherein the tape retaining portion has two essentially parallel, flat, main surfaces and forms two confronting arms, which are adapted to clamp a fastener tape therebetween, said tape-retaining portion being further provided with at least one protrusion.
- One known way of manufacturing metal fastener elements or teeth is to punch the teeth out of a piece of flat wire. This is usually done in a series of stamps: the stamping provides a particularly flat surface to (at least) one side of the teeth manufactured in this way, and when the teeth are piled together and coated with some special substances, such as lacquer for polishing, the surface tension of the liquid that gathers on the flat surfaces of the teeth may result strong enough to act like a glue and thereby cause the teeth to become stuck together.
- the method disclosed therein provides for disrupting the flatness of the stamped surface of the metal teeth to ensure that the surface tension of a liquid coating applied thereto does not have the undesired sticking effect. That problem is solved according to that prior method by forming one or more protrusions on at least one flat surface of a fastener element or tooth. Disclosure of the Invention
- the anti-sticking protrusions with which the fastener elements or teeth are to be provided with in accordance with WO2010/089854A1 are however quite difficult to manufacture by the continuous stamping process disclosed therein.
- the fastener elements are made by punching out from a wire, using a cutting punch and die arrangement.
- the said protrusions are to be made in relief in the fastener elements in areas which are completely "surrounded” by the relevant main surface of the element. This, and the comparatively poor plasticity of the metal materials, makes the creation of the protrusions rather difficult.
- a fastener element of the initially-defined kind characterized in that said at least one protrusion is provided on an edge portion of at least one of said main surfaces of the tape retaining portion of the fastener element. Forming one or more protrusions on the edges of the main surfaces of the tape-retaining portion can be more easily and reliably achieved in a continuous stamping process.
- the above-mentioned confronting arms can comprise proximal portions having inner edges which join with one another through an intermediate concave junction, and in that case said at least one protrusion extends on at least part of the length of said junction.
- said at least on protrusion extends for the length of said junction, and therebeyond, into proximal portions of the inner edges of said confronting arms.
- said confronting arms extend along a longitudinal direction thereof, and the ratio between the longitudinal distance from the distal end of the protrusion to a line drawn to join the furthest point of each distal end of said two arms, and the longitudinal distance from the center of the edge of said junction or flexure to that same line is of about 0.6 or more, and is preferably comprised between about 0.6 and 0.7.
- protrusion extends, preferably continuously, along the inner edge of said arms, from the distal end of one arm to the distal end of the other one, and along said junction.
- protrusions extend only on portions of the inner edge of said arms, the edge of said junction having no protrusion(s).
- the protrusion(s) has(have) a tapered cross-sectional profile which projects to an extent which progressively decreases away from the edge of the tape-retaining portion of the fastener element.
- the height of the or each protrusion in a semi-finished condition of the fastener element can be comprised between 0.04 mm and 0.07 mm.
- the height of the or each protrusion in the finished condition of a fastener element is conveniently of about 0.02 mm.
- the transverse width of the or each protrusion is conveniently of about 0.1 to 0.15 mm.
- the present invention also relates to methods for manufacturing improved fastener elements.
- such a method includes punching a band-like metal wire material using a cutting punch and a cutting die. Another method includes a step of die-casting the fastener elements.
- Figure 1 is a front view of a slide fastener comprising a plurality of fastener elements according to the present invention
- Figure 2 is a perspective view illustrating a fastener element according to a first embodiment of the present invention
- Figure 3 is a top plan view illustrating the fastener element of figure 2 before being clamped onto a fastener tape;
- Figure 4 is a view illustrating the fastener element of figure 3 after being clamped onto a fastener tape
- Figure 5 is a perspective view schematically illustrating a cutting punch and a cutting die through which a fastener element according to the invention is punched from a rectangular wire material;
- Figures 6 and 7 are partial cross-sectional views, schematically illustrating process steps by which a fastener element is punched from a rectangular wire material
- Figure 8 is a side elevational view illustrating a fastener element according to the present invention.
- Figure 9 is a top plan view for explaining a relationship between two dimensions of a fastener element according to the present invention.
- Figure 10 is a perspective view schematically illustrating another embodiment of a fastener element according to the present invention.
- Figure 11 is a side elevational view of the fastener element shown in figure 10;
- Figure 12 is a top plan view, illustrating another fastener element according to the present invention before being clamped onto a fastener tape;
- Figure 13 is a view showing the fastener element of figure 12 after being clamped onto a fastener tape
- Figure 14 is a top plan view illustrating a still further fastener according to the present invention, before being clamped onto a fastener tape;
- Figure 15 shows the fastener element of figure 14 after being clamped onto a fastener tape
- Figure 16 is top plan view illustrating another fastener element according to the present invention, before being clamped onto a fastener tape,
- Figure 17 shows the fastener element of figure 16, after having been clamped onto a fastener tape
- Figure 18 is a longitudinal cross-section view of a fastener element according to present invention.
- FIG 1 there is shown a slide fastener 1 comprising a pair of stringers 3, comprising each a respective flexible tape 2.
- the confronting edges of the tapes 2 are provided each with respective pluralities of fastener elements or teeth 10 according to the present invention, which will be later described in greater detail.
- the slide fastener 1 in a per se known manner comprises further a slider 4, for engaging and disengaging the fastener elements 10, as well as top end stops 5 and a bottom end stop 6.
- a fastener element 10 comprises a metal body 11 including a coupling portion 12 and a tape-retaining portion 13.
- the coupling portion 12 includes a coupling concave portion 14, recessed in a first, flat, main surface 20 of the fastener element 10, and a coupling convex portion 15 (see also figures 7 and 8) projecting from a second, opposite, flat, main surface 21 of the fastener 1.
- the coupling portion 12 of the fastener element 10 may have different shapes in particular those which will be described later.
- the tape retaining portion 13 forms two confronting arms 16, with distal ends 16a bent one toward the other.
- the arms 16 each have a flat surface perpendicularly adjoining the main surfaces 20 and 21.
- Each arm 16 has at least an internal surface facing the other arm and an external surface on the face opposite to that of the internal surface.
- the arms 16 of the fastener element 10 extend wide apart along respective and preferably diverging directions. Said arms 16 have respective proximal portions with inner edges 16b (see figures 3 and 4) which join with one another through an intermediate junction 17.
- the junction 17 may have one of many possible configurations, for instance may be curved and concave, or essentially rectangular, or arrow-shaped, etc. and is formed between the arms 16. Said junction 17 has a flat internal surface 17a which lies between the internal surfaces of each of the arms 16 and perpendicularly adjoins the main surfaces 20 and 21.
- junction 17 and arms 16 are continuous and form an internal surface perpendicularly adjoining the main surfaces 20 and 21.
- At least one anti-sticking protrusion is provided on an edge portion of at least one of the main surfaces of the tape-retaining portion.
- a protrusion 30 extends on the edge of the junction 17, for the entire length thereof, and also beyond the junction 17, into proximal portions 16b of the inner edges of the arms 16.
- the protrusion 30 is formed on the edge of the main surface 20 where it adjoins the internal surface 17a of the junction 17.
- the ratio between the longitudinal distance B from the distal ends of the protrusion 30 to a line 1 drawn to join the furthest point of each distal 16a of the arms 16, and the longitudinal distance A from the center of the edge of the junction 17 to that same line 1 is about 0.6 or more, and is preferably comprised between about 0.6 and 0.7.
- the protrusions 30 may interfere with the attachment of the fastener elements to the edge of a fastener tape, which is generally provided with a cord, such as that indicated C in figure 4.
- the fastener element 10 disclosed above in connection with figures 2 to 8 and 9 can be conveniently manufactured by punching a rectangular wire material, such as that indicated 31 in figures 5 to 7.
- the wire material 31 is punched from the upper surface side by a cutting punch 32 and a cutting die 33.
- the protrusion 30 is configured and shaped by a recess 35 predisposed in the cutting punch 32, and cut to the desired profile through the cooperation of the cutting punch 32 with the cutting die 33.
- Figure 6 shows the cutting punch 32, the cutting die 33 and the band-like metal wire 31 in the condition immediately prior to the commencement of the stamping process.
- Figure 7 shows the fastener element 10 in the state immediately after it has been formed by the stamping process.
- the protrusion 30 thereof is formed in the process that takes place between the condition shown in figure 6 and the condition shown in figure 7.
- the recess 35 provided in the cutting punch 32 (figure 6) enables to form the protrusion 30 by plastic local deformation of the metal material. Said recess 35 is formed at the edge of the cutting surface of the punch 32.
- the fastener elements 10 according to the present invention are made of metal, for instance a copper alloy, a nickel alloy, and aluminum, or the like.
- FIGS 10 and 11 show another embodiment of a fastener element according to the present invention, which differs from the embodiment described hereinbefore only as far as the coupling portion 12 thereof is concerned.
- the fastener 10 according to figures 10 and 11 includes a coupling head 18 (that may be referred to simply as “coupling head”) having coupling convex portions 19 and a tape- sandwiching portion 13 that extends from a base end portion (a rear end portion) of the coupling head 18 through a step surface 40.
- the fastener element 10 is configured as a so- called double-side element in which the coupling convex portions 19 are disposed on the upper surface side and the lower surface side of the coupling head 18, respectively.
- the upper element surface of the fastener element 10 is a first element surface that abuts on a leading end surface of the cutting punch 32 when punched from the rectangular wire material 31, and the lower element surface is a second element surface which is opposite to it.
- the coupling head 18 includes a thin walled flat plate portion 18a disposed at a central portion in the front-back direction, the coupling convex portions 19 that are projectingly disposed on the upper surface and the lower surface of the flat plate portion 18a, and left and right rising portions 41 that are raised from the flat plate portion 18a in the vertical direction and extend toward the left and right sides of the coupling convex portion 19 from the tape- sandwiching portion 13. Further, a coupling concave portion 22 surrounded by the coupling convex portion 19, the left and right rising portions 41, and the tape- sandwiching portion 13 are formed in the coupling head 18.
- the flat plate portion 18a of the coupling head 18 is formed at a predetermined thickness thinner than the tape- sandwiching portion 13, and left and right side edges of the flat plate portion 18a are formed to have a circular arc shape or a tapered shape when viewed in the element vertical direction so that a dimension of the left-right width direction of the flat plate portion 18a gradually decreases toward a front end from a base end side.
- the coupling convex portion 19 is projectingly disposed to bulge in a protruding shape at a left-right central portion of the flat plate portion 18a.
- a height position (a position in the vertical direction) of the top of the coupling convex portion 19, that is, a height dimension in the vertical direction, from the upper and lower surfaces of the flat plate portion 18a to the top of the coupling convex portion 19, are set be equal to or larger than a height dimension in the vertical direction, from the upper and lower surfaces of the flat plate portion 18a to upper and lower surfaces of the tape- sandwiching portion 13 (particularly, a body portion 42 of the tape-sandwiching portion 13 which will be described later), respectively.
- the position of the front end edge of the coupling convex portion 19 is set behind the position of a front end edge of the flat plate portion 18a, and the upper surface of the flat plate portion 18a is disposed between the front end edge of the coupling convex portion 19 and the front end edge of the flat plate portion 18a.
- the rising portion 41 is formed to rise from the flat plate portion 18a in the vertical direction. It includes an extension portion 41a that extends forward from the tape- sandwiching portion 13 and has a constant thickness, and an inclined portion 41b that is inclined downward toward the front side from the front end of the extension portion 41a. In this case, the front end edge of the rising portion 41 is disposed to be positioned ahead of the rear end edge of the coupling convex portion 19.
- the tape-sandwiching portion 13 includes a body portion 42 that extends backward from the coupling head 18 and a pair of left and right leg portions 16 that branch off to the left and right, respectively and extend from the body portion 42.
- the body portion 42 in the tape- sandwiching portion 13 connects the coupling head 18 with the left and right leg portions 16.
- the upper and lower surfaces and the left and right side surfaces of the body portion 42 are respectively flush with the upper and lower surfaces and the left and right side surfaces of the extension portion 41a of the rising portion 41 and the leg portions 16.
- the leg portions 16 are provided in a manner of branching off from a rear end of the body portion 42 into two legs and extending from the rear end.
- the tape retaining portion 13 of the fastener element 10 of figures 10 and 11 essentially corresponds to that of the embodiment according to figures 2-9.
- the tape retaining portion 13 is provided, on at least one main surface 20, with a protrusion 30 which extends continuously along the inner edge of the arms 16, from the distal end of one arm to the distal arm of the other one, as well as along the intermediate junction 17.
- the protrusion 30 provided on (at least) one main surface 20 of the fastener element extends continuously, i.e. in one piece, along one edge of the tape-retaining portion
- such a protrusion may comprise a plurality of separate, spaced apart, protrusion portions.
- the edges of the arms 16 are provided each with respective protrusion portions 30, whereas the edge of said intermediate junction 17 has no protrusions.
- the edges of the arms 16 have no protrusions, whereas the edge of the intermediate junction 17, which is the continuous integral inner surface between said arms, is provided with a protrusion 30.
- the or each protrusion 30 of a fastener element 10 according to the present invention has a tapered cross-sectional profile, which protrudes to an extent which progressively decreases away from the edge of the tape-retaining portion
- the height (i.e. the extent of projection) of the or each protrusion in a semi-finished condition of a fastener element 10 is conveniently comprised between 0.04 mm and 0.07 mm, whereas in the finished condition of the fastener element it is of about 0.02 mm.
- fastener elements according to the present invention can be manufactured by a method including punching a band-like metal wire material 31 with a cutting punch 32 and a cutting die 33, wherein the tape retaining portion 13 of the fastener element 10 includes a first surface portion 20, which abuts on the cutting punch 32, and a second surface portion 21, opposite said surface portion 20.
- the at least one anti-sticking protrusion 30 is disposed on said first surface portion 20.
- At least one further anti-sticking protrusion can be formed on said second surface portion 21 of the tape retaining portion 13 of the fastener element.
- Alternative methods may include die-casting the fastener elements by forcing molten metal under pressure into a mould cavity having a shape corresponding to that of the fastener elements to be formed.
- the mould cavity in particular is provided with one or more recesses having a shape corresponding to that of the protrusions to be formed in accordance with the present invention.
- the fastener elements obtained by die casting are characterized by a pretty good surface finish and dimensional consistency.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Slide Fasteners (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2011/073843 WO2013091712A1 (en) | 2011-12-22 | 2011-12-22 | Fastener element for a slide fastener, and methods for the manufacture thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2793634A1 true EP2793634A1 (en) | 2014-10-29 |
EP2793634B1 EP2793634B1 (en) | 2015-09-16 |
Family
ID=45418690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11802100.5A Active EP2793634B1 (en) | 2011-12-22 | 2011-12-22 | Fastener element for a slide fastener, and methods for the manufacture thereof |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2793634B1 (en) |
CN (1) | CN104023581B (en) |
TW (1) | TWI483690B (en) |
WO (1) | WO2013091712A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO20130094A1 (en) * | 2013-02-05 | 2014-08-06 | Ykk Corp | LAMPO HINGE AND COUPLING ELEMENTS FOR A LAMPO HINGE |
CN203986428U (en) * | 2014-07-18 | 2014-12-10 | 垦青(浙江)拉链有限公司 | A kind of metal punching slide fastener |
CN106560259B (en) * | 2015-12-01 | 2018-12-14 | 福建晋江浔兴拉链科技有限公司 | Metal tooth, chain tooth molding die and chain tooth processing method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB624199A (en) * | 1946-08-01 | 1949-05-30 | Leon Hendrickx | Improvements in interlocking elements for sliding clasp fasteners which are to be electrolytically treated |
US2628400A (en) * | 1949-10-06 | 1953-02-17 | Scovill Manufacturing Co | Slide fastener |
JPS5635052Y2 (en) * | 1977-05-04 | 1981-08-18 | ||
CN2170665Y (en) * | 1993-12-08 | 1994-07-06 | 叶克晓 | Double point bidirectional slide fastener |
EP2014188B1 (en) * | 2007-07-10 | 2011-03-02 | YKK Corporation | Metallic double-sided element and slide fastener |
EP2394525B1 (en) * | 2009-02-04 | 2018-12-26 | YKK Corporation | Fastener element |
CN102204737A (en) * | 2011-05-13 | 2011-10-05 | 江苏博豪拉链制造有限公司 | Metal pinion and metal zipper thereof |
-
2011
- 2011-12-22 EP EP11802100.5A patent/EP2793634B1/en active Active
- 2011-12-22 CN CN201180075879.0A patent/CN104023581B/en active Active
- 2011-12-22 WO PCT/EP2011/073843 patent/WO2013091712A1/en active Application Filing
-
2012
- 2012-11-23 TW TW101144061A patent/TWI483690B/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2013091712A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN104023581A (en) | 2014-09-03 |
TW201334728A (en) | 2013-09-01 |
WO2013091712A1 (en) | 2013-06-27 |
CN104023581B (en) | 2017-06-16 |
EP2793634B1 (en) | 2015-09-16 |
TWI483690B (en) | 2015-05-11 |
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