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WO1997033816A1 - Systeme ameliore de fixation elastique en u - Google Patents

Systeme ameliore de fixation elastique en u Download PDF

Info

Publication number
WO1997033816A1
WO1997033816A1 PCT/US1996/003361 US9603361W WO9733816A1 WO 1997033816 A1 WO1997033816 A1 WO 1997033816A1 US 9603361 W US9603361 W US 9603361W WO 9733816 A1 WO9733816 A1 WO 9733816A1
Authority
WO
WIPO (PCT)
Prior art keywords
tongue
filament
clip
tongues
clips
Prior art date
Application number
PCT/US1996/003361
Other languages
English (en)
Inventor
David Jarrett Room
Paul Wolfgang Lackler
Matthew Graszer
Original Assignee
Stanley/Hartco Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stanley/Hartco Company filed Critical Stanley/Hartco Company
Priority to AU53623/96A priority Critical patent/AU5362396A/en
Priority to US08/637,710 priority patent/US5927491A/en
Priority to PCT/US1996/003361 priority patent/WO1997033816A1/fr
Publication of WO1997033816A1 publication Critical patent/WO1997033816A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B15/00—Nails; Staples
    • F16B15/08—Nails; Staples formed in integral series but easily separable

Definitions

  • This invention relates generally to an improved U-clip and more specifically to an assembled arrangement of such clips which are abuttingly suspended in a continuous fashion on a carrier strip of pliant material so that the clips can be easily stored or used in a clinching tool, where the tool secures juxtaposed wires together.
  • U-clips have been well known and used with clinching tools in various fields such as upholstery or the mattress and bedding industries where either two wire springs, or a spring and a border retaining wire are secured together.
  • the U-clips are typically aligned and collated in a stacked configuration so that each individual clip is similarly arranged in abutting relationship with the adjacent clip. Clips arranged in a stacked configuration facilitate neat and orderly storage, as well as providing a linear alignment that is especially adapted for rapid and successive feeding of clips into a reformation or clinching tool which is positioned over a pair of parallel wires.
  • Stacks of clips can be wound under tension around a cylindrical core member, much like a spool of string, and then stored by packaging the spools in a shipping or storage carton.
  • a cylindrical core member much like a spool of string
  • Stacks of clips can be wound under tension around a cylindrical core member, much like a spool of string, and then stored by packaging the spools in a shipping or storage carton.
  • an individual stack of clips is to be used, it is unwound under tension, begirining with the free end, and then the free end is inserted into the clinching tool in a linear fashion so that clamping together of at least two juxtaposed wires can occur.
  • Most clips are retained in the collated stacks by employing various clip designs in conjunction with various retention means, such as adhesive tapes, or dimpled, grooved, or troughed clips which receive metallic wires, plastic filaments, or the like.
  • the clip retention means must have a requisite flexibility and strength for withstanding the spool winding and unwinding forces, as well as feeding of the clinching tool. Furthermore, it is a desire not to incorporate a clip retention means which will ultimately affect or interfere with the clamping of the clip around the wires to be joined.
  • the U. S. Patent No. 5,314,065 sought to overcome the above mentioned shortfalls by providing a clip with a plastic filament that was positively, rather than frictionally held against the side of the clip.
  • This disclosure presents a rather complicated U-clip, wherein a filament-anchoring tab on each clip side is simultaneously compressed downwardly in order to positively attach the parallel filaments to the clip. Locating the filament-catching tabs along the sides of the clip, exposes a multitude of edges on each tab, causing collated clips to entangle with each other. When this happens, continuous unwinding and feeding of a spool of clips becomes problematic if not impossible. Another shortfall of this clip is that material is punched-out from the blank when forming the tabs; this weakens the clip.
  • a generally U-shaped clip which has an arcuate crown portion and laterally spaced leg portions downwardly depending from said crown.
  • the top of the crown is first provided with an upstanding tongue which has an end projecting above a lip formed into the crown surface.
  • the lip delimits a tab opening which exists as a result of the formation of the upstanding tongue, said tab opening directly underlying said tongue and creating a pocket area for the filament strip to be compressed into when the tongue is pressed back towards the crown.
  • the plastic filament interconnects a collated stack of clips and provides flexibility and strength required for winding and unwinding the clips on and off the spooling means. After the filament is inserted, the tongues are deflected downwardly, back towards the crown surface in order to positively retain the filament to the clip; a partial reinsertion of the tab into the opening substantially reduces the interlocking and catch points the tongue would present if left upstanding.
  • plastic filament strip is preferably used instead of metal, no sharp edges will be created when a leading clip is severed from the stack.
  • Using a plastic filament also eliminates the problem of glue buildup which is normally present when clips are collated with tape, although it should be understood that other filament materials are not being excluded from the scope of the invention.
  • Figure 1 is a plan view of a metal blank used to form a clip of the present invention
  • Figure 2 is a perspective view of a U-shaped clip of the present invention formed from the blank of Figure 1 ;
  • Figure 3A is a perspective view showing a collated stack of clips and generally how the top surface of the crown retains the plastic filament therein;
  • Figure 3B is a perspective view showing a collated stack of clips wherein the upwardly projecting tongues point the same direction;
  • Figure 3C is a perspective view showing a collated stack of clips wherein only a single tongue and filament arrangement is provided;
  • Figure 3D is a perspective view of another variation to the tongue and filament arrangement
  • Figure 4A is a cross- sectional view along line I-I of Figure 3A, showing the filament and tongue arrangement both before and after the filament is squeezed into the tongue opening after the tongue is depressed;
  • Figure 4B is a top view of a clip with the tongue removed on the right clip side in order to emphasize the formation of the tab opening;
  • Figure 5 is an end view between clips illustrating the filament position with respect to the crown
  • Figure 6 is a side view of the tab-depressing operation.
  • a metal blank shown in Figure 1 at 10 is used to form the U-shaped clip 20 of the present invention, shown in Figure 2.
  • the blank is generally planar when initially stamped, being provided with arm 12 on its first end 15, a pair of slits 14 at the midsection 17, and a cut-out 16 on second end 19 which defines a first and a second crimping leg 26, 28.
  • the blank 10 is bent along a laterally disposed midsectional axis M to form the generally U-shaped clip 20, as shown in Figure 2.
  • slits 14 are acted upon to produce the pair of upstanding tongues 40, located on an arcuate crown 30 of the clip.
  • Each tongue is a mirror-image to the other, although each one faces a respective outside edge 32 instead of facing each other.
  • FIG. 2 also shows a wire receiving cavity 50 for accepting a pair of juxtaposed wires which are to be joined, wherein arm 12 will be drawn under and between the first and second crimping legs 26, 28, while legs 26, 28 are pulled upwardly and around the outside of arm 12 in an opposite direction such that each end 15, and 19 is joined around the wires (not shown).
  • FIG. 2 further illustrates that when each tongue 40 is formed into its upstanding position, a tab opening 33 is formed in crown 30, extending from crown top surface 29 to crown bottom surface 31.
  • Each tab opening 33 preferably has a rectangular cross-sectional profile defined by the long side walls 34 interconnecting with the short side walls 36. Tongues 40 will upwardly project from top surface 29 at an angle between 30° to 75° , no matter the diameter of the filament being used; the filament will be described later. It should be clear that each tongue will generally have a cross-sectional profile that mirrors the profile of the tab opening 33.
  • Figure 3A shows several aligned and abutting U-shaped clips 20 being interconnected together by a pair of laterally spaced and generally parallel filaments or strips 60 extending along longitudinal axis "L".
  • This figure generally illustrates the cooperative arrangement of the clips, the tongues, and the pairs of filament, rather than any particular details of those members, or how the filament strips are actually inserted and retained on each clip. For greater detail on those facets.
  • Figure 4B is provided, which is a view along sectional line I-I of Figure 3A.
  • Figure 4B illustrates that each filament strip 60 is laterally directed by a force F in a direction normal to axis L, in order to secure the filament to each clip at tongue 40.
  • Figure 3B shows another variation to the double filament clip of Figure 3A.
  • Figure 3B merely emphasizes that the benefits of the present invention can be realized no matter if both tongues face each other, face away from each other, or face in the same direction.
  • a single-tongued clip arrangement is possible, as shown in Figure 3C, and for that matter, there is nothing prohibiting the single or double-tongued arrangement to incorporate a flat, rectangularly configured filament, as Figure 3D illustrates.
  • the tongue 40 is generally rectangularly-shaped and is stamped, rather than punched-out of the blank material. This is important in protecting the strength and economy of the clip. By that it is meant that if the tongues were formed wherein some of the crown surface was punched-out by a punching tool, there would be a natural limitation as to how diminimus the punch-outed portion could become before the tools would start to spall or break. Thus, it should be appreciated that when the material is removed, a width limitation is created as a result of the tools.
  • the present clip does not punch-out any portion of the clip, so it has no limitation as to how dimensionally small the tongues can be made.
  • This advantageously allows smaller filament diameters to be used, thereby providing a cost savings.
  • the filament is surprisingly a costly component.
  • Figure 4B shows the right tongue 40 being truncated so that other clip components can be more clearly seen. It can now be appreciated that when the tongue 40 is stamped from the blank, it projects upwardly off of top surface 29 of crown 30, forming the long walls 34 and the short wall 36, which collectively define the perimeter of tab opening 33.
  • each of the long walls 34 becomes bent and slightly stretched, such that a lip portion 70 is formed on each long wall.
  • the short wall 36 forms no lip.
  • each of the tongues are stamped, rather than punched, the configuration of the stamping tools forms a dog-legged or hooked, cross-sectional configuration into each tongue.
  • each tongue 40 is resultantly defined by a long leg, designated by "L”, and a short leg "S”, each of which cooperatively form the arcuate vertex "V".
  • L long leg
  • S short leg
  • the dog-legged configuration of each tongue is important to the present invention in several respects because it performs two important functions.
  • the vertex "V" creates a natural pocket for filament 60 to be retained and protected within, as the left hand tongue of Figure 4B illustrates, and this factor is important in two respects.
  • the tongue could not be depressed back into the tab opening to the extent now achievable, otherwise, the filament would get severed.
  • the lip 70 allows additional tongue depression towards tab opening 33 since this edge is not a sharp, discrete edge that could severe the filament.
  • the extended surface area of lip 70 also provides an enlarged area for filament 60 to be conformed against, which further works against severing of the filament.
  • the short leg “S” has a slightly angled orientation, it is a natural outcome that when the tongue 60 is pressed downwardly towards tab opening 33 after filament insertion, the leading edge or tip 44 makes touching contact against the edge 37 of the front short wall 36.
  • the left hand tongue is depressed back towards tab opening 33, and leading edge 44 is no longer in an upwardly exposed and prone position for creating catch points for other clips to become entangled against or for an assembler to cut his hand on.
  • a low profile crown surface facilitates clean feeding and operation within the clip-binding tools.
  • a third advantageous effect of the dog-legged configuration is that vertex "V" facilitates a favorable orientation of the filament within and between adjacent clips.
  • the vertex promotes the retention of the original outside diameter of the filament as it extends between the clips. This creates the favorable situation where the filament 60, upper outer surface and top surface 47 of tongue 40, are as close to the same level as possible. This favorably keeps the filament 60 in close proximity to any exposed sharp edges which are created on the sides of the tongues.
  • filament 60 is fabricated from a low density, plastic such as polypropelene, and in this case, also has a hollow interior, as best seen in Figure 3A.
  • the hollow interior provides additional compressibility and formability into tongue opening 33, although the ability of tongue 40 to be partially depressed back into tab opening 33 would still possible without severing a solid filament line to the vertex "V" as mentioned.
  • each tongue back into tab opening 33 after the filament has been inserted is not performed in a single motion because it was discovered that a single, tongue-depressing operation places too much downward force on the clip, causing the clip legs 22, 24 to buckle.
  • the progressive deflection of each tongue ensures that the stresses within the filament to slowly distribute themselves, meaning the filament will elastically deform during the tongue pressing process.
  • Figure 6 shows the operating mechanism for depressing tongues 40 in a progressive manner.
  • a bar 80 having an angled or tapered bottom face 82, is moved in an up and down fashion, being hinged at 84.
  • a first end 85 of bar 80 contacts a tongue top surface 44, thereby barely making any downward displacement of tongue 40 into pocket 33.
  • the tongue 40 is progressively depressed into pocket 33 according to its position along rail 100.
  • tongue 40 is finally contacted at second end 87, tongue 40 is depressed to a position within pocket 33 as best seen from Figure 4B.
  • each tongue 40 will not be completely depressed back into pocket 33 so as to be flush or coextensive with crown top surface 29. It is merely desirable to depress tongue 40 as close to surface 29 without cutting filament 60. The exact amount the tongue projects above surface 29 is more dependent upon the size of the clip and can be best determined by experimentation. It should also be understood, that the above-mentioned process is directed to depressing the tongues while they are first tied together in a continuous string formation. Strips of clips for use in hand-held clinching tools, can be easily cut the desired strip length from the string, through an additional process step.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheet Holders (AREA)

Abstract

Cette invention concerne un système de fixation élastique permettant de fixer des câbles appariés, lequel système se compose de plusieurs fixations en U (20) qui sont orientées dans le même sens et qui sont maintenues ensemble à l'aide d'une paire de filaments (60) parallèles et espacés l'un de l'autre. Ces filaments sont fixés par l'intermédiaire d'un élément languette (40) à la surface (29) d'une couronne supérieure située sur chaque fixation. Ce filament élastique et déformable peut être comprimé et maintenu dans une ouverture, ceci lorsque la languette a été enfoncée vers le bas et sur ledit filament, empêchant ainsi ce dernier de s'échapper de la fixation. Aucune partie du filament ou de la languette ne dépasse dans la cavité (50) de la fixation qui va recevoir le câble.
PCT/US1996/003361 1996-03-12 1996-03-12 Systeme ameliore de fixation elastique en u WO1997033816A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU53623/96A AU5362396A (en) 1996-03-12 1996-03-12 Improved resilient u-clip assembly
US08/637,710 US5927491A (en) 1996-03-12 1996-03-12 Resilient U-clip assembly
PCT/US1996/003361 WO1997033816A1 (fr) 1996-03-12 1996-03-12 Systeme ameliore de fixation elastique en u

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1996/003361 WO1997033816A1 (fr) 1996-03-12 1996-03-12 Systeme ameliore de fixation elastique en u

Publications (1)

Publication Number Publication Date
WO1997033816A1 true WO1997033816A1 (fr) 1997-09-18

Family

ID=22254840

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/003361 WO1997033816A1 (fr) 1996-03-12 1996-03-12 Systeme ameliore de fixation elastique en u

Country Status (2)

Country Link
AU (1) AU5362396A (fr)
WO (1) WO1997033816A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0907033A3 (fr) * 1997-10-02 2000-04-19 Stanley Fastening Systems, L.P. Clip avec fentes et procédé
US7231751B2 (en) 2003-03-04 2007-06-19 Diaperoos, Llc Packaging diaper with deceptive outward appearance
CN113623300A (zh) * 2020-05-06 2021-11-09 A·雷蒙德公司 销钉

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613878A (en) * 1969-08-29 1971-10-19 Hartco Co U-clip assembly
US3722670A (en) * 1971-03-19 1973-03-27 Signode Corp Clip stack
US5303821A (en) * 1992-11-06 1994-04-19 Ayres Donald B Resilient clip assembly
US5314064A (en) * 1993-05-03 1994-05-24 L&P Property Management Company Sheet metal clip

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613878A (en) * 1969-08-29 1971-10-19 Hartco Co U-clip assembly
US3722670A (en) * 1971-03-19 1973-03-27 Signode Corp Clip stack
US5303821A (en) * 1992-11-06 1994-04-19 Ayres Donald B Resilient clip assembly
US5314064A (en) * 1993-05-03 1994-05-24 L&P Property Management Company Sheet metal clip

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0907033A3 (fr) * 1997-10-02 2000-04-19 Stanley Fastening Systems, L.P. Clip avec fentes et procédé
US7231751B2 (en) 2003-03-04 2007-06-19 Diaperoos, Llc Packaging diaper with deceptive outward appearance
CN113623300A (zh) * 2020-05-06 2021-11-09 A·雷蒙德公司 销钉

Also Published As

Publication number Publication date
AU5362396A (en) 1997-10-01

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