EP4509019A1 - Federkern - Google Patents

Federkern Download PDF

Info

Publication number
EP4509019A1
EP4509019A1 EP23192139.6A EP23192139A EP4509019A1 EP 4509019 A1 EP4509019 A1 EP 4509019A1 EP 23192139 A EP23192139 A EP 23192139A EP 4509019 A1 EP4509019 A1 EP 4509019A1
Authority
EP
European Patent Office
Prior art keywords
spring core
strip steel
springs
frame
core according
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.)
Pending
Application number
EP23192139.6A
Other languages
English (en)
French (fr)
Inventor
Sabine Grothaus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agro Holding GmbH
Original Assignee
Agro 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 Agro Holding GmbH filed Critical Agro Holding GmbH
Priority to EP23192139.6A priority Critical patent/EP4509019A1/de
Publication of EP4509019A1 publication Critical patent/EP4509019A1/de
Pending legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
    • A47C23/04—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using springs in compression, e.g. coiled
    • A47C23/05—Frames therefor; Connecting the springs to the frame ; Interconnection of springs, e.g. in spring units
    • 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 or spring units therefor
    • A47C27/07—Attaching, or interconnecting of, springs in spring inlays

Definitions

  • the present invention relates to a spring core for the production of mattresses or upholstered furniture, having a plurality of springs arranged in rows and a frame made of strip steel, which surrounds a surface with springs and is fixed at least on a part of the springs.
  • a spring core is known in which a frame-shaped edge reinforcement is formed by a wire which is connected to the respective outer springs of the spring core.
  • a frame made of a round wire improves stiffness at the edge, these wires are not suitable for roll packaging and it is difficult to roll up such reinforced spring cores for a small transport volume.
  • the frame made of the wire is therefore often only attached to the customer after the spring cores have been unrolled, which is comparatively complex.
  • the spring core according to the invention comprises a frame of a strip steel which has a different inclination on at least two sides of the frame.
  • the steel strip can be optimally aligned to allow compression of the spring core and rolling up in one direction, while on another side increased rigidity is achieved by a different orientation of the steel strip.
  • the frame has two long sides and two front sides, wherein the orientation of the strip steel is the same on the two long sides.
  • the orientation of the strip steel on the two end sides can be the same, wherein the length of the long sides is preferably longer than on the end sides, but these can optionally also be of the same length.
  • the spring core can be wound up more easily over the long side or the front side, but increased rigidity is provided on the other side.
  • the stiffness of the strip steel is greater on the long sides than on the front sides, since the long sides are more often loaded by a user during use.
  • the strip steel preferably has a twist on at least one corner area. Such twisting changes the orientation of the steel strip by one axis in the longitudinal direction of the steel strip. This twisting can rotate the strip steel by at least 80°, preferably the strip steel is rotated on different sides of the twist by about 90°.
  • the twisting does not have to be arranged exactly in the bent corner area of the strip steel, but can also be provided adjacent to the bend in a corner area to facilitate the production of the bent corner area.
  • the frame is preferably bent from a single section of a strip steel connected at opposite ends to make the frame from one part.
  • the frame may also have a plurality of sections of a steel strip that are connected to each other, for example by welding, gluing or mechanical fasteners.
  • the strip steel is preferably rectangular in cross-section.
  • the width of the strip steel may be in a range of 2.5 to 15 mm, in particular 5 mm to 12 mm, while the height is between 1.2 to 1.8 mm, in particular 1.3 to 1.6 mm.
  • the strip steel is designed to be bendable and windable around the height, while the larger width ensures rigidity in the corresponding direction.
  • the terms "width” and “height” do not refer to the orientation of the strip steel, but only to the dimensions related to the rectangular cross-section. Depending on the arrangement of the strip steel, the height can therefore be measured horizontally, vertically or in a different spatial direction.
  • the strip steel is preferably connected to springs via several clamps.
  • the strip steel can be fixed circumferentially on all outer springs with a clamp or other fastening means.
  • the frame can also be attached to only a part of the outer springs.
  • the outer boundary of the spring core is preferred for the connection to the strip steel.
  • the springs can be formed as pocket springs, Bonell springs or as LFK springs, whereby different types of springs can be combined with each other.
  • a series of springs outside the frame can also be provided.
  • a single frame may be provided on the spring core.
  • This single frame can be fixed, for example, centrally on the springs.
  • several frames can be arranged at different heights around the spring core, for example, a frame is arranged at the bottom and a frame at the top of the spring core.
  • the frame can also be positioned depending on the spring type, either in the middle, at the top or at the bottom of the spring core.
  • Such a spring core is preferably used for the production of a mattress or upholstered furniture.
  • a spring core 1 comprises a plurality of springs connected along rows and joined together to form a rectangular or square composite in plan view.
  • the springs 2 are connected via schematically represented connecting means 3 to strands, wherein the springs are formed as pocket springs, Bonell springs, LFK springs with the same or different spring zones.
  • the unit of springs 2 is surrounded by a frame 4, which is formed by a circumferential strip steel.
  • the frame 4 comprises two long sides 5 and two front sides 6.
  • the strip steel is formed from a single section which is connected at the two ends, optionally the strip steel of frame 4 may also be formed from a plurality of composite sections.
  • the strip steel is arranged with the flat surface upwards, so that on the front sides 6 the frame 4 has a larger width than on the long sides 5 in plan view.
  • the strip steel is arranged rotated by about 90°, so that the flat side is aligned in the vertical direction parallel to the direction of action of the spring 2.
  • a twist 7 is provided, which is arranged in the region of a spring in the corner region or adjacent to it, so that the frame 4 has a different stiffness in the vertical direction on the long sides 5 and the front sides 6.
  • the stiffness of the strip steel is greater on the long sides 5, so that the edge reinforcement is increased, in this area the users usually sit at the edge.
  • the stiffness in the vertical direction is lower due to the rotated arrangement of the strip steel, since at the end sides 6 there is usually less of a seat load.
  • This twisting of the strip steel results in different stiffnesses, and the spring core 1 shown can thus be more easily unwound and unwound for transport.
  • the springs 2 can be compressed in the direction of action and then wound around an axis parallel to the longitudinal side 5.
  • the turned arrangement of the strip steel can also be designed differently, so that winding around an axis parallel to the front side 6 is possible.
  • a corner area of the spring core 1 is shown, on which the strip steel of the frame 4 is rotated along the twist 7 about 90 °.
  • the strip steel is connected at the front side 6 via brackets 8 with a spring 2, wherein the clamp engages both the strip steel 4 and the wire of the spring 2.
  • the strip steel is curved in the area of the spring 2 in the corner area and fixed on two sides of the spring 2 with a clamp 8 each. Behind the second bracket, the twist 7 is then arranged, with which the strip steel is rotated by 90 °, so that it is vertically aligned along the long side 5. Also on the long sides, the strip steel is connected via brackets 8 with the respective outer springs 2.
  • two frames 4 are provided, a frame 4 at the bottom of the spring core 1 and a frame 4 at the top. It is of course possible to provide only a single frame 4, which is arranged either below, above or in a middle area. In addition, more than two frames 4 can be fixed to the springs 2.
  • the fixing of the frame 4 is carried out via metallic brackets 8. It is also possible to choose other fasteners.
  • the attachment to the springs 2 can also be done to the surrounding nonwoven material if the springs 2 are arranged in pockets of non-woven fabric.
  • the strip steel for frame 4 is rectangular in cross-section and preferably has a width between 2.5 mm to 15 mm and a height between 1.2 mm to 1.8 mm.
  • the steel material can be unalloyed carbon steel or alloyed steel such as stainless steel.
  • the strip steel can be produced by flattening a steel wire or other suitable methods for producing a strip steel with a rectangular cross-section.
  • the cross-section does not necessarily have to be exact a rectangular, it could be slightly shaped such as oval, dumbbell-shaped, kidney.

Landscapes

  • Springs (AREA)
EP23192139.6A 2023-08-18 2023-08-18 Federkern Pending EP4509019A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23192139.6A EP4509019A1 (de) 2023-08-18 2023-08-18 Federkern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23192139.6A EP4509019A1 (de) 2023-08-18 2023-08-18 Federkern

Publications (1)

Publication Number Publication Date
EP4509019A1 true EP4509019A1 (de) 2025-02-19

Family

ID=87747968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23192139.6A Pending EP4509019A1 (de) 2023-08-18 2023-08-18 Federkern

Country Status (1)

Country Link
EP (1) EP4509019A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1709303A (en) * 1927-11-12 1929-04-16 Herz Bed Company Spring-mattress structure
US2196526A (en) * 1939-05-08 1940-04-09 Nachman Springfilled Corp Spring assembly for upholstery
US3142071A (en) 1960-11-22 1964-07-28 Nachman Corp Spring assembly for bedding and furniture
DE1654319A1 (de) 1967-12-12 1971-02-18 Molt Otto P Randfederung fuer Federkerne von Sitzpolstern
US3688320A (en) * 1969-06-30 1972-09-05 Silientnight Ltd Spring units for furniture
KR200152800Y1 (en) * 1996-12-31 1999-07-15 Min Byung Kwan Frame structure of a chair seat

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1709303A (en) * 1927-11-12 1929-04-16 Herz Bed Company Spring-mattress structure
US2196526A (en) * 1939-05-08 1940-04-09 Nachman Springfilled Corp Spring assembly for upholstery
US3142071A (en) 1960-11-22 1964-07-28 Nachman Corp Spring assembly for bedding and furniture
DE1654319A1 (de) 1967-12-12 1971-02-18 Molt Otto P Randfederung fuer Federkerne von Sitzpolstern
US3688320A (en) * 1969-06-30 1972-09-05 Silientnight Ltd Spring units for furniture
KR200152800Y1 (en) * 1996-12-31 1999-07-15 Min Byung Kwan Frame structure of a chair seat

Similar Documents

Publication Publication Date Title
US8490232B2 (en) Spring core having border wire with generally rectangular cross-section
US5724686A (en) Cushion or mattress border support
US10631657B2 (en) Cushions including flat springs
JP2004503268A (ja) インナースプリング体及びマットレス用の押出フォーム強化構造
JP2749196B2 (ja) 内装ばね
US8332974B2 (en) Bedding foundation having border wire with generally rectangular cross-section
US20090288258A1 (en) Innerspring assembly with edge reinforcement
US7044454B2 (en) Mattress inner spring assembly
US4180877A (en) Mattress
US7237282B2 (en) Stackable and stable bedding foundation
EP4509019A1 (de) Federkern
US9044102B2 (en) Spring core having border wire with generally rectangular cross-section
US4112528A (en) Box spring assembly and small diameter single cone coil spring for use in that assembly
US4369534A (en) Center reinforced mattress
CN116801770A (zh) 床垫弹簧芯
WO2025214656A1 (en) Spring core assembly for a mattress assembly and mattress assembly
US20060080783A1 (en) Mattress structure with an improved lumbar zone
CA3071041C (en) Pocket spring core and method for producing the same
US4051567A (en) Mattress or cushion spring assembly
US4057860A (en) Box spring assembly
US5375820A (en) Drop-in unit, grid insert therefor and method of making same
US2151155A (en) Spring cushion unit
US3205513A (en) Coil-spring assembly
JP2912856B2 (ja) スプリング装置
JPS586382Y2 (ja) ベツドの基台構造

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20250806