EP3261493B1 - Procédé de fabrication d'un ressort d'ameublement, ressort d'ameublement, matelas et meuble rembourré - Google Patents

Procédé de fabrication d'un ressort d'ameublement, ressort d'ameublement, matelas et meuble rembourré Download PDF

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Publication number
EP3261493B1
EP3261493B1 EP16701681.5A EP16701681A EP3261493B1 EP 3261493 B1 EP3261493 B1 EP 3261493B1 EP 16701681 A EP16701681 A EP 16701681A EP 3261493 B1 EP3261493 B1 EP 3261493B1
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EP
European Patent Office
Prior art keywords
spring
steel wire
upholstery
spring steel
colour indicator
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.)
Active
Application number
EP16701681.5A
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German (de)
English (en)
Other versions
EP3261493A1 (fr
Inventor
Wolfgang 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
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Publication date
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Publication of EP3261493A1 publication Critical patent/EP3261493A1/fr
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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
    • A47C27/068—Spring inlays made from a single wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F35/00—Making springs from wire

Definitions

  • the present invention relates to a method for producing a cushion spring, in particular for upholstered furniture or mattresses, a cushion spring, a mattress and upholstered furniture.
  • the DE 10 2013 103 644 discloses a spring made of wire of a spring core, which can be used for example for mattresses or upholstered furniture.
  • the spring consists of a helically wound spring steel wire, which deforms under load.
  • Such springs have been proven in the manufacture of upholstered furniture and mattresses, with the springs being heat treated during manufacture to make them more tough. By such a heat treatment is a lowering of individual springs and consequent lowering, such as cooling in upholstery or mattresses, prevented.
  • the CN 1283705 A shows another example of the prior art, which is considered useful for the understanding of the invention. It is therefore an object of the present invention to provide a method for producing a cushion spring, which can be ensured in a simple manner that a sufficient heat treatment has been made.
  • a mattress and upholstered furniture to be provided with such a cushion spring.
  • the method for producing a cushion spring at least partially, a heat-sensitive color indicator is applied to a spring steel wire before, during or after bending the spring steel wire, and then the spring steel wire is heated to at least the Umzzi temperature of the color indicator before the pad spring is completed.
  • a heat-sensitive color indicator ensures that the heat treatment of the spring steel wire can be made visually visible.
  • a corresponding color change it is apparent to both the manufacturer of upholstered furniture and mattresses as well as the end customer, whether a heat treatment has been made, which makes the spring steel wire toughened. As a result, an important quality criterion for upholstery springs can be highlighted.
  • the spring steel wire is heated above 280 ° C in the heat treatment.
  • the spring steel wire for example, be heated to a temperature between 290 ° C to 310 ° C, the duration of the heat treatment can be designed depending on the spring steel wire used, but at least briefly the temperature above 290 ° C must be achieved.
  • the turnover temperature of the color indicator is therefore preferably also at least 250 ° C, in particular between 290 ° C and 310 ° C. At these temperatures, the positive effects of the heat treatment occur.
  • the color indicator can be applied by immersion.
  • the coating can be carried out purely electrochemically or galvanically by applying a voltage.
  • the color indicator preferably has a thickness between 0.05 to 1 .mu.m, in particular 0.10 and 0.80 .mu.m, so that the color indicator is applied only in small quantities on the spring steel wire.
  • a copper-containing coating is applied as color indicator, which does not adversely affect the mechanical properties of the cushion spring.
  • the copper-containing coating can also consist essentially entirely of copper, which is applied to the spring steel wire with a small layer thickness. It is also possible to use suitable copper alloys to set a certain turnover temperature. In the color change then the copper-colored coating is darker or lighter, depending on the temperature reached, which is visually easily recognizable.
  • the color indicator is only partially applied to the spring steel wire, which is particularly material-saving.
  • the color indicator can be applied, for example, only on a central region of the cushion spring, which deforms under load, so that at least visible by the color indicator, whether the deforming region is heat treated. Then arranged on opposite sides end rings of a cushion spring can remain uncoated. Of course, it is also possible to completely coat the cushion spring with the color indicator.
  • a cushion spring is provided, which is used in particular in a mattress or upholstered furniture.
  • a viewing window is provided so that an end customer can recognize whether the pad spring has been heat treated accordingly.
  • FIG. 2 shows a pad spring without a coating of a heat-sensitive color indicator. It can be seen that the spring steel wire from which the cushion spring is made has the same color everywhere and is not visually recognizable as to whether a heat treatment has been performed on this cushion spring to make the spring steel wire toughened.
  • FIG. 1 On the left in FIG. 1 a cushion spring according to the present invention is shown.
  • the cushion spring is helically wound in a central region between two parallel end rings and coated in this central region with a heat-sensitive color indicator.
  • the central area has a different color than the two uncoated end rings of the cushion spring.
  • the middle area is much darker due to the color change of the heat-sensitive color indicator due to heat treatment.
  • On the right side is a padded spring with color indicator and without heat treatment. It can be clearly seen that the color is uniform.
  • a heat-sensitive color indicator a copper-containing coating in a thickness of between 0.15 ⁇ m to 0.75 ⁇ m was electrochemically applied to the wire in the middle region.
  • the wire was passed through a dip bath while a voltage applied to the spring steel wire, so that the copper-containing coating has settled on the surface.
  • the layer thickness and the coated areas can be set comparatively accurately.
  • the color indicator can be applied to the still undeformed spring steel wire, so that it only after the coating in the form of a Pad spring is deformed. Preferably, then a complete coating is made. But it is also possible to first form the spring steel wire to a cushion spring and at least partially coat the already formed spring steel wire.
  • the bent spring steel wire was subjected to a heat treatment, whereby the bent spring steel wire was heated to a temperature between 210 ° C to 250 ° C. By heating to this temperature, the color indicator was activated so that an optically detectable color change was made in the central area.
  • a cushion spring only the middle region of a cushion spring is coated with a color indicator, wherein it is also possible to completely apply the color indicator to the cushion spring.
  • a color indicator By partially coating the color indicator, however, it is easier to visually recognize the color change by the heat treatment.
  • the cushion spring can be bent to different types of springs.
  • the cushion spring may be formed as a Bonellfeder, pocket spring, open coil or another spring type.
  • the upholstery springs can also be combined into units of several upholstery springs and then processed into mattresses or upholstered furniture.
  • At least one transparent window or windows formed by a recess can be provided in the cover, so that a visual check is possible as to whether the upholstery spring is heat-treated.

Claims (12)

  1. Procédé de fabrication d'un ressort de rembourrage en particulier pour des meubles rembourrés ou des matelas comprenant des étapes consistant à :
    - appliquer au moins par zones un indicateur de couleur sensible à la chaleur sur un fil d'acier à ressort avant, pendant ou après le cintrage de ce fil,
    - chauffer le fil en acier à ressort à au moins la température de changement de couleur de l'indicateur de couleur, et
    - achever le ressort de rembourrage.
  2. Procédé conforme à la revendication 1,
    caractérisé en ce que
    le fil d'acier à ressort est chauffé à une température supérieure à 250°C pour effectuer un traitement thermique et une activation de l'indicateur de couleur.
  3. Procédé conforme à la revendication 1 ou 2,
    caractérisé en ce que
    le fil en acier à ressort est chauffé à une température comprise entre 280°C et 320°C pour effectuer un traitement thermique et une activation de l'indicateur de couleur.
  4. Procédé conforme à l'une des revendications précédentes,
    caractérisé en ce que
    l'indicateur de couleur est appliqué sur le fil d'acier à ressort dans un bain de trempage.
  5. Procédé conforme à l'une des revendications précédentes,
    caractérisé en ce que
    l'indicateur de couleur est appliqué avec une épaisseur comprise entre 0,05 µm et 1,5 µm, en particulier entre 0,10 µm et 0,80 µm.
  6. Procédé conforme à l'une des revendications précédentes,
    caractérisé en ce qu'
    en tant qu'indicateur de couleur on applique un revêtement renfermant du cuivre.
  7. Procédé conforme à l'une des revendications précédentes,
    caractérisé en ce que
    l'indicateur de couleur n'est appliqué que par zones sur le fil d'acier à ressort.
  8. Procédé conforme à la revendication 7,
    caractérisé en ce que
    l'indicateur de couleur est appliqué sur une zone médiane du ressort de rembourrage qui se déforme sous l'action d'une charge.
  9. Ressort de rembourrage obtenu par la mise en oeuvre du procédé conforme aux revendications 1 à 8.
  10. Matelas équipé d'un ressort de rembourrage conforme à la revendication 9.
  11. Meuble rembourré équipé d'un ressort de rembourrage conforme à la revendication 9.
  12. Matelas ou meuble rembourré conforme à la revendication 10 ou 11,
    caractérisé en ce qu'
    il est prévu une fenêtre de visualisation sur une housse du ressort de rembourrage ou une unité constituée de plusieurs ressorts de rembourrage.
EP16701681.5A 2015-02-23 2016-01-28 Procédé de fabrication d'un ressort d'ameublement, ressort d'ameublement, matelas et meuble rembourré Active EP3261493B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015102539.6A DE102015102539A1 (de) 2015-02-23 2015-02-23 Verfahren zur Herstellung einer Polsterfeder, Polsterfeder, Matratze und Polstermöbel
PCT/EP2016/051784 WO2016134913A1 (fr) 2015-02-23 2016-01-28 Procédé de fabrication d'un ressort d'ameublement, ressort d'ameublement, matelas et meuble rembourré

Publications (2)

Publication Number Publication Date
EP3261493A1 EP3261493A1 (fr) 2018-01-03
EP3261493B1 true EP3261493B1 (fr) 2018-06-06

Family

ID=55236385

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Application Number Title Priority Date Filing Date
EP16701681.5A Active EP3261493B1 (fr) 2015-02-23 2016-01-28 Procédé de fabrication d'un ressort d'ameublement, ressort d'ameublement, matelas et meuble rembourré

Country Status (9)

Country Link
US (1) US20180042394A1 (fr)
EP (1) EP3261493B1 (fr)
CN (1) CN107249393B (fr)
AU (1) AU2016223811B2 (fr)
BR (1) BR112017015669B1 (fr)
DE (1) DE102015102539A1 (fr)
ES (1) ES2675229T3 (fr)
PT (1) PT3261493T (fr)
WO (1) WO2016134913A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3448207B1 (fr) * 2016-04-26 2022-10-26 AGRO Holding GmbH Ressort de matelassure, procédé de réalisation d'un ressort de matelassure, matelas et meuble matelassé

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6295364B1 (ja) * 2017-09-29 2018-03-14 東洋ファイン株式会社 金属加工品及び金属加工品の表面処理方法
CN108339908A (zh) * 2018-01-10 2018-07-31 郭开怀 一种床垫弹簧加工设备

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Also Published As

Publication number Publication date
US20180042394A1 (en) 2018-02-15
CN107249393A (zh) 2017-10-13
WO2016134913A1 (fr) 2016-09-01
BR112017015669B1 (pt) 2021-01-19
EP3261493A1 (fr) 2018-01-03
BR112017015669A2 (pt) 2018-03-13
AU2016223811A1 (en) 2017-08-17
ES2675229T3 (es) 2018-07-09
AU2016223811B2 (en) 2020-12-24
CN107249393B (zh) 2020-08-14
DE102015102539A1 (de) 2016-08-25
PT3261493T (pt) 2018-10-09

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