EP2922446B1 - A spring element for mattresses and a method for making a spring element for mattresses - Google Patents

A spring element for mattresses and a method for making a spring element for mattresses Download PDF

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Publication number
EP2922446B1
EP2922446B1 EP13812087.8A EP13812087A EP2922446B1 EP 2922446 B1 EP2922446 B1 EP 2922446B1 EP 13812087 A EP13812087 A EP 13812087A EP 2922446 B1 EP2922446 B1 EP 2922446B1
Authority
EP
European Patent Office
Prior art keywords
spring
casing
longitudinal axis
neck
making
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
EP13812087.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2922446A1 (en
Inventor
Diano Tura
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.)
Flexfor Srl
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Flexfor Srl
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Publication date
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Publication of EP2922446A1 publication Critical patent/EP2922446A1/en
Application granted granted Critical
Publication of EP2922446B1 publication Critical patent/EP2922446B1/en
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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
    • A47C27/063—Spring inlays wrapped or otherwise protected
    • A47C27/064—Pocketed springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B68—SADDLERY; UPHOLSTERY
    • B68G—METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
    • B68G9/00—Placing upholstery springs in pockets; Fitting springs in upholstery

Definitions

  • This invention relates to a spring element for mattresses and a method for making a spring element for mattresses.
  • this invention applies to the technical sector of products for the night-time area of a home, and in particular to the making of mattresses for beds.
  • WO 98/25503A1 describes a spring element similar to the one of the invention.
  • spring elements are made of the double type, that is, equipped with a first and a second spring coaxial with each other and arranged one inside the other to give the mattress a compliance which is gradual and more suitable for the needs of the user.
  • the prior art spring elements have a first outer spring with a greater length and lesser rigidity, inside of which is positioned a second spring with a shorter length and greater rigidity (that is, with coils of a smaller diameter and closer together).
  • both the springs have been inserted inside a bag, which only prevents the sliding between two adjacent spring elements and not between the first and the second spring of a single element.
  • the aim of this invention is to provide a spring element for mattresses and a method for making a spring element for mattresses which overcome the above mentioned drawbacks of the above-mentioned prior art.
  • the aim of this invention is to provide a spring element for mattresses which is silent and comfortable for the user, and a method for making a spring element for mattresses which is simple and inexpensive.
  • the numeral 1 denotes a spring element for mattresses according to this invention.
  • the spring element 1 is an elastic body used inside spring mattresses, to make the resting of the user comfortable. More specifically, numerous spring elements 1 are located inside the mattress, positioned in lines and columns to occupy the entire surface on which the mattress is lying.
  • Each spring element 1 comprises an elastic element 1 a equipped with a first 2 and a second helical spring 4 extending along a longitudinal axis "A".
  • Each spring 2, 4 extends about the longitudinal axis "A" with a succession of first 3a and second coils 3b.
  • the second spring 4 extends inside the first spring 2.
  • each second coil 3b is positioned inside a first coil 3a of the first spring 2.
  • the second coils 3b each have a diameter less than the first coils 3a in which they are positioned.
  • the second helical spring 4 extends (inside the first spring 2) along the longitudinal axis "A" between its first end 4a and its second end 4b.
  • the first end 4a of the second spring 4 is proximal (preferably connected) to the first end 2a of the first spring 2.
  • the second end 4b of the second spring 4 is, on the other hand, positioned at a predetermined distance from the second end 2b of the first spring 2.
  • axial distance in this text means a distance measured along the longitudinal axis "A”.
  • the axial extension of the first spring 2 is greater than that of the second spring 4.
  • both the first 2 and the second spring 4 extend (in a helical fashion) in a substantially prismatic fashion.
  • the diameter of two successive first coils 3a is substantially equal.
  • the diameter of two successive second coils 3b is also substantially equal.
  • first 2 and the second spring 4 are connected to each other (irremovably), preferably at the respective first ends 2a, 4a.
  • first 2 and the second spring 4 are made as a single piece, formed by a single metal wire twisted and wound on two substantially coaxial helixes (corresponding, respectively, to the first 2 and the second spring 4).
  • the second spring 4 is more rigid than the second spring 2 (which yields more) to give the spring element 1 elastic properties which vary as a function of the position along the compression stroke.
  • the spring element 1 comprises a casing 5 which is deformable and at least partly tubular positioned around the first spring 2.
  • the outer casing 5 defines a chamber 6 for containing the first 2 and the second spring 4.
  • the outer casing 5 is preferably made from a non-self-supporting material (highly deformable) with a low friction coefficient.
  • non-self-supporting is used to mean an extremely rollable material, which can be stored, for example, in rolls, and which can be easily wrapped around the first spring 2 to incorporate it.
  • the casing 5 is made using a piece 9 of the material wound around the first spring 2.
  • the low coefficient of friction of the material is to be assessed as a function of the noise.
  • the main aim of the presence of the casing 5 is to reduce the noise which arises from the rubbing of two or more springs (of two adjacent spring elements 1, or of two springs of the same spring element 1, as described in more detail below).
  • the casing 5 (and, thus, the piece 9) is made from non-woven fabric (or similar material).
  • the casing 5 could be made from fabric or mesh.
  • the casing 5 has at least one neck 7 interposed between the second end 4b of the second spring 4 and the second end 2b of the first spring 2 for separating the chamber 6 (of the casing 5) into a first compartment 6a, containing a portion 8a of the first spring 2 and the second spring 4, and a second compartment 6b, containing an end portion 8b of the first spring 2.
  • the second spring 4 is fully contained inside the first compartment 6a, whilst the end portion 8b of the first spring 2 is located solely in the second compartment 6b, preventing an excessive offset between the first 2 and the second spring 4 and, consequently, considerably reducing the noise of the element 1.
  • the casing 5 (that is, the piece 9) has at least one tubular portion positioned around the first spring 2.
  • the neck 7 is located between two successive first coils 3a.
  • a pair of lateral flaps 10, 11 of the casing 5 are joined together at an area proximal to the longitudinal axis "A" to form the neck 7.
  • the lateral flaps 10, 11 are interposed between two successive first coils 3a and joined together close to the longitudinal axis "A".
  • the lateral flaps 10, 11 are connected by welding, preferably of the ultrasound type.
  • the casing 5 has an extension along the longitudinal axis "A" less than that of the first spring 2 in a relative extended configuration, in such a way as to reduce the distance between the second end 2b of the first spring 2 and the second end of the second spring 4, facilitating the coaxial movement.
  • the casing 5 (that is, the piece 9 wound around the first spring 2) keeps the first spring 2 slightly preloaded, facilitating the coaxial sliding between the first spring 2 and the second spring 4.
  • Another object of this invention is also a method for making a spring element for mattresses, preferably of the type described above.
  • the method comprises preparing at least one elastic element 1 a comprising the first 2 and the second helical spring 4, which extend along the longitudinal axis "A" between relative first 2a, 4a and second ends 2b, 4b.
  • the second spring 4 extends inside the first spring 2 with the second end 4b located at a predetermined axial distance from the second end 2b of the first spring 2.
  • the piece 9 is a portion of a belt or roll of non-woven fabric. Alternatively, it could be fabric or mesh.
  • the piece 9 could be designed for coating only one elastic element 1 a or a plurality.
  • the method comprises a step for coating the elastic element 1a (or the elastic elements 1a) using the piece 9, in such a way that it forms a casing 5 which is deformable and at least partly tubular positioned around the elastic element 1a.
  • the casing 5 defines inside the chamber 6 for containing the elastic element 1 a.
  • each of them is wrapped by a substantially tubular portion of the piece 9.
  • the coating step comprises a step for winding the plurality of elastic elements 1a using the piece 9, in such a way that they are completely interposed between two parallel bands of the piece 9.
  • the method also comprises a step for joining portions of the bands interposed between two adjacent elastic elements 1 a, in such a way as to define for each the casing 5, that is, the containment chamber 6.
  • the joining step comprises moving the transversal (preferably orthogonal) portions towards the longitudinal axis "A" using pusher means.
  • the method comprises a step for making a throat 7 in the casing 5 of each elastic element 1a.
  • the neck 7 is made by deforming the casing 5 at an area interposed between the second end 4b of the second spring 4 and the second end 2b of the first spring 2 for forming, inside the casing 5, a first compartment 6a, containing a portion 8a of the first spring 2 and the second spring 4, and a second compartment 6b, containing an end portion 8b of the first spring 2.
  • the chamber 6 is at least partially divided in the first 6a and in the second compartment 6b.
  • the throat 7 can be defined by a joining point or by a line.
  • the first 6b and the second compartment 6b are in communication with each other at a peripheral area (radially) of the chamber 6.
  • the step of making the neck 7 in the casing 5 comprises a sub-step of moving closer together two lateral flaps 10, 11 of the chamber 5 along a direction transversal (preferably orthogonal) to the longitudinal axis A.
  • the flaps 10, 11 are positioned on opposite sides of the casing 5 with respect to a mid plane containing the longitudinal axis "A".
  • the sub-step of moving closer together is performed using a pair of movable pushing members S1, S2, starting from respective positions distal from the longitudinal axis "A" (opposite to each other), moving them towards each other.
  • the pushing members S1, S2 are movable transversely (preferably orthogonally) to the longitudinal axis "A".
  • the step of making the neck 7 comprises, for forming the neck 7, a further sub-step of joining the two lateral flaps 10, 11 at an area proximal to the longitudinal axis "A".
  • the joining sub-step is achieved by ultrasonic welding.
  • the step for joining the portions of piece 9 interposed between two adjacent elastic elements 1 a is also performed by ultrasound welding.
  • the step is performed at the same time as the step for making the neck 7.
  • the invention achieves the set aims and brings important advantages.
  • the use of the casing to keep the two springs compact and coaxial makes the spring element high performing and at the same time inexpensive to make.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Springs (AREA)
EP13812087.8A 2012-11-23 2013-09-30 A spring element for mattresses and a method for making a spring element for mattresses Active EP2922446B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000052A ITRN20120052A1 (it) 2012-11-23 2012-11-23 Elemento a molla per materassi e metodo per la realizzazione di un elemento a molla per materassi
PCT/IB2013/058993 WO2014080302A1 (en) 2012-11-23 2013-09-30 A spring element for mattresses and a method for making a spring element for mattresses.

Publications (2)

Publication Number Publication Date
EP2922446A1 EP2922446A1 (en) 2015-09-30
EP2922446B1 true EP2922446B1 (en) 2017-07-05

Family

ID=47633380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13812087.8A Active EP2922446B1 (en) 2012-11-23 2013-09-30 A spring element for mattresses and a method for making a spring element for mattresses

Country Status (3)

Country Link
EP (1) EP2922446B1 (it)
IT (1) ITRN20120052A1 (it)
WO (1) WO2014080302A1 (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10188219B2 (en) 2015-03-17 2019-01-29 Richard Codos Mattress
US10624468B2 (en) 2015-03-17 2020-04-21 Sleepovation Llc Pillow
US10617224B2 (en) 2015-03-17 2020-04-14 Sleepovation Llc Mattress
JP6736590B2 (ja) * 2015-03-17 2020-08-05 リチャード コドス マットレス
US11324334B2 (en) 2015-03-17 2022-05-10 Sleepovation Llc Mattress

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9625616D0 (en) * 1996-12-10 1997-01-29 Harrison Bedding Limited A Pocketted springs
KR20170081298A (ko) * 2009-04-14 2017-07-11 실리 테크놀로지 엘엘씨 코일―인―코일 스프링 및 내부스프링

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ITRN20120052A1 (it) 2014-05-24
WO2014080302A1 (en) 2014-05-30
EP2922446A1 (en) 2015-09-30

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