WO2022228800A1 - Carcasse de jeu de ressort - Google Patents

Carcasse de jeu de ressort Download PDF

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Publication number
WO2022228800A1
WO2022228800A1 PCT/EP2022/058095 EP2022058095W WO2022228800A1 WO 2022228800 A1 WO2022228800 A1 WO 2022228800A1 EP 2022058095 W EP2022058095 W EP 2022058095W WO 2022228800 A1 WO2022228800 A1 WO 2022228800A1
Authority
WO
WIPO (PCT)
Prior art keywords
elongate reinforcing
reinforcing member
pocket
edge
assembly
Prior art date
Application number
PCT/EP2022/058095
Other languages
English (en)
Inventor
Niels Albæk
Morten JØRGENSEN
Original Assignee
L&P Swiss Holding Gmbh
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 L&P Swiss Holding Gmbh filed Critical L&P Swiss Holding Gmbh
Publication of WO2022228800A1 publication Critical patent/WO2022228800A1/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
    • A47C27/063—Spring inlays wrapped or otherwise protected
    • A47C27/064—Pocketed springs
    • 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
    • A47C27/066—Edge stiffeners

Definitions

  • the invention relates to a pocket spring core, a bedding or seating product comprising a pocket spring core, and a method of manufacturing a pocket spring core.
  • Pocket spring cores are widely used in seating and bedding products. Pocket spring cores may be made of a matrix of multiple pocketed springs joined together by a fabric within which each an individual spring is contained. Additionally, the matrix of multiple pocketed springs may be enclosed by a frame extending along a circumference of the matrix of the multiple pocketed springs. The frame may be positioned on a top and/or bottom side of the pocketed springs and may be fastened by clips to pocketed springs at the edges of the matrix.
  • each clip 14 For coupling the frame 12 with the clips 14 to the coil springs, each clip 14 penetrates the nonwoven material of a corresponding pocket 13. Coupling the frame 12 to the coil springs with clips 14 is a manual or semiautomatic task as the positioning of the frame 12 has to be aligned for each pocket spring element 11 to ensure correct clipping to an appropriate position at the corresponding coil spring. For each size of a pocket spring core 10, for example for different sizes of mattresses, a correspondingly sized frame 12 is required and many variants of frames must be provided.
  • a pocket spring core and a method of manufacturing a pocket spring core as defined in the independent claims are provided.
  • the dependent claims define embodiments of the invention.
  • the at least two elongate reinforcing members comprise a first elongate reinforcing member and a second elongate reinforcing member separate from the first elongate reinforcing member.
  • each of the elongate reinforcing members is an individual component which can be manufactured and positioned independent from any other elongate reinforcing member and which is not formed integrally with another elongate reinforcing member.
  • the first elongate reinforcing member is arranged along a first edge of the assembly and the second elongate reinforcing member is arranged along a second edge of the assembly. The first edge and the second edge are located on opposite sides of the assembly.
  • first elongate reinforcing member is spaced apart from the second elongate reinforcing member.
  • the first elongate reinforcing member is glued to a first plurality of pockets of the plurality of pocketed spring elements arranged along the first edge of the assembly, and the second elongate reinforcing member is glued to a second plurality of pockets of the plurality of pocketed spring elements arranged along the second edge of the assembly.
  • the pocket spring core may have a rectangular shape of a predefined length and width.
  • the pocketed spring elements of a row correspond to the length of the pocket spring core, and the pocketed spring elements of a column correspond to the width of the pocket spring a core.
  • the first elongate reinforcing member may be glued to each pocketed spring element of a row along the first edge of the assembly, and the second elongate reinforcing member may be glued to each pocketed spring element of a row along the second edge of the assembly.
  • gluing the elongate reinforcing members to the pockets no fastening materials, for example clips, are required, such that gluing the elongate reinforcing members to the pockets may be automated and may be performed by a machine or robot. As a result, manufacturing cost may be reduced. Furthermore, the elongate reinforcing members may be attached to the pocketed spring elements at an arbitrary position of the pocketed spring elements.
  • the at least two elongate reinforcing members comprise a third elongate reinforcing member and a fourth elongate reinforcing member separate from the third elongate reinforcing member.
  • the third elongate reinforcing member is arranged along a third edge of the assembly and the fourth elongate reinforcing member is arranged along a fourth edge of the assembly.
  • the third edge and the fourth edge are located on opposite sides of the assembly.
  • the third edge and the fourth edge may be parallel to each other and perpendicular to the first and second edges of the assembly
  • the third elongate reinforcing member is glued to a third plurality of pockets of the plurality of pocketed spring elements arranged along the third edge of the assembly
  • the fourth elongate reinforcing member is glued to a fourth plurality of pockets of the plurality of pocketed spring elements arranged along the fourth edge of the assembly.
  • the rod or band may have a quadratic cross section, a rectangular cross section, a triangular cross section, a trapezium cross section, a polygonal cross section, a circular cross section, an ellipse cross section, or an oval cross section.
  • the type of cross-section in combination with a corresponding dimensioning of the cross section may support stability of the elongate reinforcing members and roll packaging of the mattress.
  • the reinforcing member comprising the rod embedded in the strip may be provided as a prefabricated component, e.g., as a cut-off section of an "endless" reinforcing element or a reinforcing member with predetermined length, which is glued to the pocket spring core.
  • the rod is directly glued to the corresponding plurality of pockets. This means that, apart from the glue, there may be no further components between the rod and the plurality of pockets.
  • a strip of nonwoven material may be arranged on the rod and glued to the corresponding plurality of pockets so as to cover the rod.
  • the strip of nonwoven material may have a width larger than a width of the elongate reinforcing member. The strip of nonwoven material may thus contribute to avoid that glue residues outside the rod attaches to other components when stacking several pocket spring core units or roll packaging the pocket spring core.
  • the polyurethane adhesive may comprise for example a PU adhesion based on isocyanate and polyolen or polyol.
  • the epoxy lime adhesive may comprise for example two-component epoxy glue.
  • Such glue or adhesive may have properties which meet requirements of durability tests according to EN1957 without breakage of the glue connections between the elongate reinforcing members and the plurality of pockets, for example between a steel rod and a pocket of nonwoven/woven material, or between a steel rod enclosed in nonwoven/woven material and a pocket of nonwoven/woven material.
  • such glue or adhesive may enable to roll pack for example a mattress comprising the pocket spring core with elongate reinforcing members glued to the pockets in rolls with a maximum diameter of 60-70 cm, preferably 62-63 cm, including 7 to 30 pocketed spring elements in line along the rolling direction, without breakage of the glue connections between the elongate reinforcing members and the pockets either during or after opening the roll in a controlled opener.
  • such glue or adhesive may allow the roll packed pocket spring core to be exposed during storage to low temperatures far below 0°C not causing the glue connections between the elongate reinforcing members and pockets to break when opening the roll packed pocket spring core later.
  • each pocket of the plurality of pockets has a substantially cylindrical shape having a top surface and a bottom surface.
  • Each of the at least two elongate reinforcement members is glued to the top surfaces or bottom surfaces of the corresponding plurality of pockets.
  • elongate reinforcement members may be glued to both, the top surfaces and the bottom surfaces of the corresponding plurality of pockets.
  • each pocket of the plurality of pockets is made by spunbonding. Additionally or as an alternative, each pocket of the plurality of pockets may be made by needlepunching woven material or other nonwoven material. Such pockets may provide a reliable enclosing for the coil springs and may be reliably glued to the elongate reinforcing members.
  • a bedding or seating product comprises a pocket spring core as defined above.
  • the pocket spring core comprises an assembly of a plurality of pocketed spring elements arranged in rows and columns. Each pocketed spring element of the plurality of pocketed spring elements is formed of a pocket and at least one coil spring which is enclosed by the pocket.
  • each pockets may comprise more than one coil spring, for example for adjusting a firmness or rigidity of a mattress or some areas thereof.
  • the coil springs may be formed of a metal wire, for example steel wire.
  • the pocket spring core comprises at least two elongate reinforcing members.
  • the at least two elongate reinforcing members comprise a first elongate reinforcing member and a second elongate reinforcing member separate from the first elongate reinforcing member.
  • the first elongate reinforcing member is arranged along a first edge of the assembly and the second elongate reinforcing member is arranged along a second edge of the assembly. The first edge and the second edge are located on opposite sides of the assembly.
  • the first elongate reinforcing member is glued to a first plurality of pockets of the plurality of pocketed spring elements arranged along the first edge of the assembly, and the second elongate reinforcing member is glued to a second plurality of pockets of the plurality of pocketed spring elements arranged along the second edge of the assembly.
  • a first elongate reinforcing member and a second elongate reinforcing member of the at least two elongate reinforcing members are positioned separate from each other and such that the first elongate reinforcing member is arranged along a first edge of the assembly and the second elongate reinforcing member is arranged along a second edge of the assembly.
  • the first edge and the second edge are located on opposite sides of the assembly.
  • the first elongate reinforcing member is glued to a first plurality of pockets of the plurality of pocketed spring elements arranged along the first edge of the assembly, and the second elongate reinforcing member is glued to a second plurality of pockets of the plurality of pocketed spring elements arranged along the second edge of the assembly.
  • the pocket spring core may comprise the pocket spring core defined in the embodiments above.
  • At least the steps of positioning and gluing of the at least two elongate reinforcing members may be performed automatically by a manufacturing machine, for example by a robot. This may contribute to reduce production cost.
  • Fig. 6 shows a schematic view of the pocket spring core of Fig. 5 in more detail.
  • Each pocketed spring element 21 comprises a pocket 22 and at least one coil spring (not shown) enclosed by the pocket 22.
  • the pocket 22 may be made by spunbonding or needlepunching woven material or other nonwoven material.
  • Each pocketed spring element 21 may be formed by providing a fabric layer, inserting the coil spring into the fabric layer, folding the fabric layer so as to cover the coil spring either before or after insertion of the coil spring, and applying longitudinal and transverse seams, for example by welding.
  • each pocketed spring element 21 may have a cylindrical or barrel shape.
  • a number of pocketed spring elements 21 may be arranged in a row which may extend along a length of the product, for example the mattress.
  • a symmetry axis of the cylindrical or barrel shape extends in an up/down direction such that the sides of the pocketed spring elements 21 are in contact.
  • Several of such rows may be arranged in a side-by-side relationship to create an assembly or matrix of pocketed spring elements 21 in rows and columns.
  • a first row 23 of pocketed spring elements 21 is arranged along a first edge of the pocket spring core 20, and a second row 24 of pocketed spring elements 21 is arranged along a second edge of the pocket spring core 20. The first edge and the second edge are located on opposite sides of the pocket spring core 20. Further rows may be arranged between the first row 23 and the second row 24.
  • the strip 35 and the strip 30 may be non-overlapping and there may be a gap between the strip 35 and the strip 30.
  • Fig. 5 shows a further pocket spring core 40.
  • the pocket spring core 40 shown in Fig. 5 comprises the same first and second elongate reinforcing members 25, 26 as the pocket spring core 20 shown in Fig. 2.
  • the pocket spring core 40 comprises a third elongate reinforcing member 41 and a fourth elongate reinforcing member 42.
  • the third elongate reinforcing member 41 and the fourth elongate reinforcing member 42 have the same structure as the first and second elongate reinforcing members 25, 26, i.e. each of the third and fourth elongate reinforcing members 41 , 42 comprises a corresponding strip 43, 44 and a corresponding rod 45, 46.
  • the rod 45, 46 may have a round, square, triangular, trapezium, polygonal, circular, ellipse, oval or rectangular cross-section, or a combination of several of these cross sections.
  • the rod 45, 46 may have a flat rectangular cross-section and may be made of metal, e.g. spring steel.
  • the flat rectangular cross-section may distribute a load on the edge of the pocket spring core 40 to a plurality of the pocketed spring elements 21 and the spring steel may contribute to maintain the shape of the pocket spring core 40.
  • the upper layer of the strip 43 may be glued to the lower layer of the strip 43 along the longitudinal edges of the strip 43, thus enclosing the rod 45. Additionally, the rod 45 may be glued to the upper and/or lower layer of the strip 43 to keep the rod 45 at a fixed position with respect to the strip 43 and the pockets 22 of the first column 31.
  • a covering strip (not shown), which may be made of nonwoven material, may be placed on the rod 62, for example after or while gluing the rod 62 to the pockets 22.
  • the strip may extend along the rod 62 and may have a width which is larger than the width of the rod 62.
  • the width of the strip may be sufficient to cover the rod 62 and an expected excess of glue at each side of the rod 62.
  • the width of the strip may be in a range of 5 to 15 cm, for example, the width of the strip may be 10 cm.
  • a length of the strip may correspond essentially to a length of the row or column on which it is placed. For example, a length of the strip may be in a range of 60 cm to 220 cm.
  • the elongate reinforcing members may be glued to the pocket spring core on two or four sides.
  • Elongate reinforcing members may be arranged either on the bottom side, the top side or on both sides of the pocket spring core.

Landscapes

  • Mattresses And Other Support Structures For Chairs And Beds (AREA)

Abstract

La présente invention concerne une carcasse de jeu de ressort (20) comprenant un ensemble de plusieurs éléments ressorts ensachés (21) disposés en rangées (23, 24) et en colonnes (31, 32), chacun des multiples éléments ressorts ensachés (21) étant formé d'une poche (22) et d'au moins un ressort hélicoïdal enfermé par la poche (22). La carcasse de jeu de ressort (20) comprend au moins deux éléments d'armature allongés comprenant un premier élément d'armature allongé (25) et un second élément d'armature allongé (26) séparé du premier élément d'armature allongé (25). Le premier élément d'armature allongé (25) est disposé le long d'un premier bord de l'ensemble et le second élément d'armature allongé (26) est disposé le long d'un second bord de l'ensemble. Le premier bord et le second bord sont situés sur des côtés opposés de l'ensemble. Le premier élément d'armature allongé (25) est collé à de multiples premières poches (22) des multiples éléments ressorts ensachés (21) disposés le long du premier bord de l'ensemble, et le second élément d'armature allongé (26) est collé à de multiples secondes poches (22) des multiples éléments ressorts ensachés (21) disposés le long du second bord de l'ensemble.
PCT/EP2022/058095 2021-04-30 2022-03-28 Carcasse de jeu de ressort WO2022228800A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21171616.2 2021-04-30
EP21171616.2A EP4082397A1 (fr) 2021-04-30 2021-04-30 Noyau de ressort de poche

Publications (1)

Publication Number Publication Date
WO2022228800A1 true WO2022228800A1 (fr) 2022-11-03

Family

ID=75746513

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/058095 WO2022228800A1 (fr) 2021-04-30 2022-03-28 Carcasse de jeu de ressort

Country Status (2)

Country Link
EP (1) EP4082397A1 (fr)
WO (1) WO2022228800A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB598953A (en) * 1944-11-11 1948-03-02 John Dale Boyd Improvements in or relating to mattresses, upholstery and the like
US2790979A (en) * 1954-11-08 1957-05-07 Nachman Corp Spring assembly for upholstery
WO1996035355A1 (fr) * 1995-05-12 1996-11-14 New Technology I Lidköping Ab Procede de montage d'elements d'encadrement
JPH09276084A (ja) * 1996-04-16 1997-10-28 Nippon Bed Seizo Kk ベッド用マットレス
WO2020109112A1 (fr) * 2018-11-26 2020-06-04 L&P Swiss Holding Gmbh Noyau de ressort de poche
WO2020206820A1 (fr) * 2019-04-11 2020-10-15 广州市联柔机械设备有限公司 Appareil et procédé de combinaison de liaison de maillage de lit à ressorts ensachés, et matelas à ressorts ensachés

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB598953A (en) * 1944-11-11 1948-03-02 John Dale Boyd Improvements in or relating to mattresses, upholstery and the like
US2790979A (en) * 1954-11-08 1957-05-07 Nachman Corp Spring assembly for upholstery
WO1996035355A1 (fr) * 1995-05-12 1996-11-14 New Technology I Lidköping Ab Procede de montage d'elements d'encadrement
JPH09276084A (ja) * 1996-04-16 1997-10-28 Nippon Bed Seizo Kk ベッド用マットレス
WO2020109112A1 (fr) * 2018-11-26 2020-06-04 L&P Swiss Holding Gmbh Noyau de ressort de poche
WO2020206820A1 (fr) * 2019-04-11 2020-10-15 广州市联柔机械设备有限公司 Appareil et procédé de combinaison de liaison de maillage de lit à ressorts ensachés, et matelas à ressorts ensachés

Also Published As

Publication number Publication date
EP4082397A1 (fr) 2022-11-02

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