WO2005115909A1 - Raccord en fil pour ressort - Google Patents

Raccord en fil pour ressort Download PDF

Info

Publication number
WO2005115909A1
WO2005115909A1 PCT/AU2005/000749 AU2005000749W WO2005115909A1 WO 2005115909 A1 WO2005115909 A1 WO 2005115909A1 AU 2005000749 W AU2005000749 W AU 2005000749W WO 2005115909 A1 WO2005115909 A1 WO 2005115909A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring wire
connector
wire
free ends
internal bore
Prior art date
Application number
PCT/AU2005/000749
Other languages
English (en)
Inventor
Pravin Manadavadi
Original Assignee
Gibbens Industries Pty Limited
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
Priority claimed from AU2004902862A external-priority patent/AU2004902862A0/en
Application filed by Gibbens Industries Pty Limited filed Critical Gibbens Industries Pty Limited
Publication of WO2005115909A1 publication Critical patent/WO2005115909A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/04—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with spring inlays
    • A47C27/06—Spring inlays
    • A47C27/07—Attaching, or interconnecting of, springs in spring inlays

Definitions

  • the present invention relates to wire connectors and, in particular, to a spring wire connector.
  • the invention has been developed primarily for use in connecting wire used in mattress innerspring systems and will be described hereinafter with reference to this application. However, it will be appreciated that the invention is not limited to this particular field of use.
  • Innerspring mattress supports have long been formed by providing a wired frame border disposed around a combination of spring coils arranged inside a mattress cover. In making the innerspring supports, it is necessary to connect the free ends of two pieces of wire used in its formation.
  • innerspring mattress units also employ a wire form in various shapes attached to the top and bottom border wires that provides additional support around the perimeter of the mattress support.
  • a wire form in various shapes attached to the top and bottom border wires that provides additional support around the perimeter of the mattress support.
  • an upper border edge of a mattress innerspring support is made from a single shaped piece of spring wire where the wire is joined to form a closed border.
  • the joining of the spring wire in the mattress innerspring support necessitates certain characteristics be provided. Since a mattress is configured to support a person(s) it is necessary that the mattress innerspring support provides a given amount of flexure when loaded and which also provides a strong joint that will allow a person to lay on the mattress or sit on the perimeter of the mattress every day over many years.
  • this type of wire connection necessarily provides an undesirable material build-up (slag) about the butt- welded joint or an overlap of wires due to the clipping process. Notwithstanding the need to apply extra steps during manufacture to clean or otherwise smooth the slag from about the butt- welds, if this is not done properly the mattress foundation cover can be torn when a load is applied by a person over the join with the cover intermediate.
  • slag material build-up
  • Another common method of joining the free ends of wire involves the use of a ferrule clamp.
  • an elongate clamp having a C-shaped cross section is disposed over the free ends of the wire to be joined where the wire being joined is substantially parallel.
  • the ferrule clamp is then crimped over the free ends of the wire to secure the free ends to each other in an interference fit with the ferrule clamp.
  • ferrule clamp means of attaching two free ends of spring wire is disadvantageous insofar as the clamp needs to be relatively accurately applied over the free ends of the wire and it does not provide a spring wire joint which is flexible when loaded. That is, the addition of the ferrule clamp stiffens the area of the spring wire mattress foundation about the join to an undesirable extent. It is also the case that the automated application of the ferrule clamps is relatively intricate and time consuming.
  • a final although much less common means of connecting the free ends of some wire forms used as innerspring mattress border supports involves knotting.
  • a predetermined additional length of the spring wire is provided and is tied up with a corresponding additional length of the other free end of the spring wire where a physical knot is affected.
  • this method provides a slag-free and relatively strong and flexible joint, it is especially intricate and time consuming to effect, necessitating the use of specialised equipment. It is further noticed that as mattresses are becoming thicker, the known spring wire free end connection methods do not provide a joint that is sufficiently strong and durable whilst retaining desired flexibility characteristics.
  • a spring wire connector formed from a metal wire and having a predetermined number of windings such that the connector includes an internal bore having a predetermined diameter extending between two ends over a predetermined longitudinal connector length, wherein the internal bore is configured to receive at each end one free end of spring wire in an interference fit.
  • the spring wire connector is formed from metal spring wire.
  • the spring wire connector is formed from a predetermined length of 1.4mm diameter spring wire with the internal bore diameter being 3.5mm and the spring wire connector being 16mm long with eleven turns.
  • the spring wire connector is configured to be tightened about the free ends of the spring wire to provide the interference fit.
  • a method of connecting the free ends of two pieces of spring wire including the steps of: winding a metal wire about a predetermined number of turns to form a spring wire connector having a predetermined internal bore diameter extending longitudinally over a predetermined length; and configuring the internal bore diameter to receive at each end one free end of spring wire to be connected in an interference fit.
  • the method includes the step of winding the connector tightly about the free ends of the spring wire.
  • FIG. 1 is a perspective view of a spring wire connector according to the preferred embodiment
  • FIG. 2 is a side view of the connector if FIG. 1
  • FIG. 3 is an end view of the connector if FIG. 1
  • FIG. 4 is a side view of a spring wire support having two free ends.
  • FIGS. 1 to 3 where like reference numerals refer to like components, there is shown a spring wire connector 1.
  • the connector 1 is formed from wound spring wire, however, it is noted that any preferred metal wire can be used.
  • the spring wire is wound a predetermined number of times to form a connector internal bore 2 of a predetermined diameter.
  • the internal bore 2 extends between two connector ends 3 and 4 over a predetermined connector length 5.
  • the internal bore 2 diameter is selected so as to receive at each connector end 3 and 4 a free end of spring wire 6 and 7 to be joined in an interference fit.
  • the spring wire used to form the connector 1 has a diameter of 1.4mm and wound to have a 3.5mm connector internal bore diameter to suit the spring wire to be joined.
  • the wire of the connector 1 is wound eleven times to provide a connector 1 having a length 5 of 16mm.
  • any preferred internal number of windings and internal bore diameter can be used, and the wire forming the connector 1 can also be any preferred diameter.
  • the number of turns of the spring wire forming the connector 1 can be chosen to provide any preferred connector length 5.
  • the free ends 6 and 7 of the spring wire to be connected are received in the internal bore 2, they can either be simply retained in an interference fit or the connector 1 can be tightened about the spring wire free ends 6 and 7 by twisting the ends 3 and 4 in opposite directions.
  • the interference fit can also be improved by the application of a circumferentially disposed and inward crimping force over the connector 1.
  • FIG. 4 is a side view of a spring wire mattress support 10.
  • the support 10 is used in mattress supports, or support frames, and includes two free ends 3 and 4 that are disposed adjacent after the support 10 is formed.
  • the connector 1 can be used to join the free ends 3 and 4. This joint is secure and relatively simple and inexpensive to effect. Further, the joint is strong enough and flexible enough for use in a mattress and bear loads applied to a mattress in use.

Landscapes

  • Springs (AREA)

Abstract

La présente invention concerne un raccord en fil pour ressort(1) constitué par un fil métallique et comptant un nombre prédéterminé de spires (1). Ce raccord présente un passage interne (2) d'un diamètre spécifié compris entre deux extrémités (3, 4) sur une longueur de raccord prédéterminée (5), ce passage interne étant conçu pour recevoir à chaque extrémité l'extrémité libre d'un fil élastique par ajustement serré.
PCT/AU2005/000749 2004-05-28 2005-05-26 Raccord en fil pour ressort WO2005115909A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2004902862 2004-05-28
AU2004902862A AU2004902862A0 (en) 2004-05-28 Spring Wire Connector

Publications (1)

Publication Number Publication Date
WO2005115909A1 true WO2005115909A1 (fr) 2005-12-08

Family

ID=35450785

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2005/000749 WO2005115909A1 (fr) 2004-05-28 2005-05-26 Raccord en fil pour ressort

Country Status (1)

Country Link
WO (1) WO2005115909A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410183A1 (fr) * 1977-11-23 1979-06-22 Normandie Atel Metallurg Meca Ressort pour assemblage de tubes
US5407291A (en) * 1994-02-03 1995-04-18 Pop-Tent, Inc. Wire connector and method
EP0783857B1 (fr) * 1996-01-09 2001-05-09 Slumberland France Armature à ressorts pour matelas et sommiers, et procédé de fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410183A1 (fr) * 1977-11-23 1979-06-22 Normandie Atel Metallurg Meca Ressort pour assemblage de tubes
US5407291A (en) * 1994-02-03 1995-04-18 Pop-Tent, Inc. Wire connector and method
EP0783857B1 (fr) * 1996-01-09 2001-05-09 Slumberland France Armature à ressorts pour matelas et sommiers, et procédé de fabrication

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