EP3419478B1 - Schale für sitze und entsprechendes verfahren - Google Patents

Schale für sitze und entsprechendes verfahren Download PDF

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Publication number
EP3419478B1
EP3419478B1 EP17716621.2A EP17716621A EP3419478B1 EP 3419478 B1 EP3419478 B1 EP 3419478B1 EP 17716621 A EP17716621 A EP 17716621A EP 3419478 B1 EP3419478 B1 EP 3419478B1
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EP
European Patent Office
Prior art keywords
shell
sub
frames
net
padding
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
EP17716621.2A
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English (en)
French (fr)
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EP3419478A1 (de
Inventor
Pierangelo GRANZOTTO
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.)
Torre Srl
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Torre Srl
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Publication date
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Publication of EP3419478A1 publication Critical patent/EP3419478A1/de
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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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/12—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats with shell-shape seat and back-rest unit, e.g. having arm rests
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
    • A47C7/282—Seat parts with tensioned springs, e.g. of flat type with mesh-like supports, e.g. elastomeric membranes
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
    • A47C7/285—Seat parts with tensioned springs, e.g. of flat type with metal strips or webs

Definitions

  • the present invention concerns a shell for seats and the corresponding method to obtain it.
  • shell we mean the shaped component of a seat with which a support is associated, such as for example the legs or other type of support.
  • the invention also concerns the seat obtained with the shell, whether in one of the intermediate forms or finished.
  • Shells are known, of various shapes and sizes, used to obtain seats with a defined rigidity and/or softness according to the specifications of use. Such shells are both made ergonomic to improve the seat, and also enhanced with suitable coverings. Such shells are for instance known from US2845699 A and US3226161 A .
  • Shaped shells are currently obtained with methods that have been studied and optimized for long serial productions that use suitable molds which are both complex and costly.
  • Methods for obtaining shells which provide to use a mold, inside which a metal strengthening frame is normally inserted, and inside which an expanding material is poured, such as for example a resin or polyurethane or other similar material configured to assume and maintain the shape of the mold.
  • the shell obtained After removing the mold and before covering the shell with an enhancing material such as, for example, leather, fabric or other material, the shell obtained can be made comfortable by applying on its surface a foam or other similar material, with a defined but constant density and softness.
  • an enhancing material such as, for example, leather, fabric or other material
  • Another known method provides to use a mold and counter-mold in which strips of wood are applied, glued to each other and shaped by one or more pressing operations, possibly performed hot.
  • Shells obtained using this known method are then shaped peripherally by a machine and possibly lined or covered with foams and/or enhancing coverings.
  • This technology allows to make usually simple shapes, since it would be expensive to design molds and counter-molds with particular shapes.
  • Both known methods described are configured to obtain a seat with a uniform rigidity and they do not allow to personalize the consistency of the seat in the different zones of the shell.
  • known shells can also be very heavy and do not allow to conform complex shells with particular curves, holes, apertures or shapes of other types.
  • the purpose of the present invention is to provide a shell that is extremely stable and that at the same time allows to obtain a personalized seat having zones with ergonomic consistency and rigidity such as to guarantee the best possible wellbeing, that is, a localized and targeted wellbeing.
  • Another purpose of the present invention is to provide a method to obtain a shell that allows to have great freedom in the planning and design stages, short times for engineering the shells, reduced plant expenses and hence also to carry out small serial productions with limited costs.
  • the inventive idea also allows to improve and perfect the technique for obtaining the final seat, simplifying and personalizing the steps and the seat, and at the same time guaranteeing good characteristics of strength and duration.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a shell for a seat comprises:
  • the frame comprises one or more functional zones peripherally defined by one or more shaped metal round pieces, continuous and/or connected with respect to each other to define the specific individual sub-frames.
  • the metal round piece has a diameter which, as a function of the bearing capacity of the seat and the type of seat, has values comprised between 8mm and 16mm, preferably comprised between 10mm and 12mm.
  • the net applied has the required perimeter figure so as to be shaped in relation to the seating requirements of the individual sub-frame to which it is applied.
  • the net has a mesh, on each occasion, defined depending on the structural needs of the various functional zones of the shell, or on the shell itself, or on the ergonomic function.
  • the padding of expanded material is applied to the round pieces and/or to the net by gluing it and/or by tying it to the sub-frame and/or to the net, so as to adhere to the net and assume the spatial conformation thereof.
  • the expanded material can be applied only on the part intended for the seat or also on the opposite and/or lateral part.
  • the support base where the legs anchor, is made with a solid plate or conformed by single elements connected to each other, made of metal or other rigid material, and is structurally attached to the frame so that the frame and the support base form a single body.
  • the present invention also provides a method to obtain a shell for a seat as claimed in claim 11.
  • the shell 10 defines a plurality of functional zones 12.
  • the functional zones 12 can define at least the backrest and the seating part of the seat 100.
  • the functional zones 12 can also define protruding and/or containing portions of the seat 100, and also possible lateral arms.
  • the shell 10 comprises a frame 11 conformed and consisting of a plurality of sub-frames 11a-11d which define and divide the shell 10 into the functional zones 12 with various shapes and sizes.
  • the sub-frames 11a-11d can be obtained directed in the finished form to define the shell 10, or they can be made separately from each other and subsequently coupled to define the shell 10.
  • the sub-frames 11a-11d are obtained from metal round pieces 13, suitably sized, shaped and welded to each other to form the rigid structure of the shell 10.
  • the round pieces 13 can be continuous elements and/or several elements connected to each other.
  • the round pieces 13 can be made for example of steel, or other metal material, and also they can have other sections than circular.
  • an equivalent diameter of the section of the round piece 13 is defined, given by the mean size of the section of the round piece 13.
  • the metal round piece 13 has a diameter that, depending on the bearing capacity of the shell 10 and/or the rigidity to be given to the frame 11, has values comprised between 8mm and 16mm, normally comprised between 10mm and 12mm.
  • At least one of the round pieces 13 extends substantially continuously along the perimeter edge defined by the shell 10, therefore avoiding the presence of blunt zones, such as the heads of the round pieces 13 might be, for example.
  • the round piece or round pieces 13 are suitably shaped and/or connected to each other to define the perimeters of each of the functional zones 12 of the shell 10.
  • the frame 11 as it is divided into functional zones 12, allows to specialize each functional zone 12 to be optimized and configured to resist specific stresses and/or overloads.
  • the shell 10 comprises at least one net 14, structurally associated with at least a part of the sub-frames 11a-11d, and having a bearing function of supporting the user sitting on the seat 100.
  • the net 14 can have a mesh with defined shape and sizes, depending on the desired and predefined rigidity and structural resistance.
  • a respective net 14 is associated with at least two of the sub-frames 11a-11d, and the net 14 associated with one of the sub-frames 11a-11d has a different structural rigidity from the net 14 associated with the other of the sub-frames 11a-11d.
  • the different structural rigidity of the net 14 can be defined by using different nets, for example having closer or wider meshes, or having filaments of different sizes.
  • the net 14 is shaped according to the shape of the shell 10 to be obtained, and to the specific structural characteristics to be provided for the shell 10 in the individual functional zones 12.
  • the shell 10 comprises a plurality of nets 14 associated with at least some of the sub-frames 11a-11d. This solution allows to obtain shapes of the shell that are very complex and difficult to obtain with state-of-the-art processes described above, for example by molding expanding polymer materials.
  • the nets 14 are shaped in a manner mating with the shape of the specific sub-frame 11a-11d to which it is connected.
  • the net 14 can be suitably shaped to define concave zones to accommodate the user.
  • the net 14 is structurally associated with the specific sub-frame 11a-11d of the individual functional zones 12, for example, by welding and/or using connection means such as hooks, clips or suchlike.
  • the net 14 is shaped so as to complete the frame 11, filling some or all the functional zones 12 of the shell 10 defined by the round pieces 13 of the individual sub-frames 11a-11d.
  • the net 14 has a thick mesh in the functional zones 12 where it is most necessary to support overloads.
  • the net 14 can be defined by a less thick mesh compared with the previous one.
  • the functional zones 12 that require greater stability are located for example at the corners and/or near the curves of the shell 10, and also on the backrest of the shell 10.
  • the shell 10 can comprise a support base, or support plane 15, configured to supply a support plane for the seat 100.
  • the support plane 15 defines at least the seating plane on which the user can sit.
  • a support 16 can be structurally associated with the support base 15.
  • the shell 10 described above and the support 16 connected to it define overall the seat 100 according to the present invention.
  • the support base 15 can be connected to the support 16 by welding for example, and/or with other anchoring elements.
  • support 16 we mean platforms, legs, stakes, support frames.
  • the support base 15 is attached to the frame 11 by means of one or more attachment elements 17, such as metal plates welded to the round pieces 13 and to the support base 15 itself.
  • the support base 15 where the legs are anchored can be defined by a plate, for example a wooden panel or a frame with crossed-over strips, and configured to support the user.
  • connection elements can be associated with the panel, and are provided to allow the connection for example of the support 16 described above.
  • the connection elements can comprise threaded inserts, integrated in the thickness of the panel.
  • the support base 15 allows to connect a support frame with which, for example, one or more legs of the seat 100, or the support 16, can be anchored.
  • the support base 15 is defined by a plurality of metal blades suitably connected with each other, for example by welding, and which allow to define the bearing and support structure for the user sitting on it.
  • a padding 18 of expanded material is positioned resting.
  • the padding 18 according to the present invention is a distinct and separate element from the sub-frames 11a-11d, and is positioned only resting against a net 14.
  • the padding 18 can be at least temporarily constrained to the sub-frames 11a-11d, by adhesives or by gluing.
  • the padding 18 can be tied with wire to be constrained to the sub-frames 11a-11d.
  • the padding 18 is positioned resting on the support base 15.
  • the padding 18 can be made for example with polyurethane or other similar material. According to a possible variant embodiment, possibly combinable with the embodiments described here, the padding 18 can comprise synthetic or natural wadding.
  • the shell 10 comprises at least two paddings 18, different from each other and with defined and different density and rigidity.
  • the paddings 18 can be suitably cut and shaped in advance, as a function of the specific functional zone 12 where they are to be applied.
  • the paddings are structurally associable with the net 14 and/or the round pieces 13 with known methods that allow the paddings 18 to assume the spatial conformation of the net 14, so as to maintain the defined shape of the shell 10.
  • the paddings 18 of expanded material can be applied on the part intended as the seat or also on the opposite and/or lateral side.
  • the paddings 18 can also be configured and conformed so as each to cover a specific functional zone 12 of the shell 10.
  • the shell 10 is completed by covering it with an enhancing material 19.
  • the enhancing material 19 is defined by at least a layer or flexible panel, such as for example leather, fake leather, cloth, fabric, non-woven fabric or other similar or comparable material.
  • the enhancing material 19 also further compacts the paddings 18 on the net 14 and on the individual sub-frames 11a-11d, so as to highlight the shape of the shell 10.
  • the enhancing material 19 covers at least the padding 18 and the frame 11, and its function is to hold the padding 18 in position with respect to the net 14, in this way preventing unwanted movements.
  • the enhancing material 19 is configured to cover substantially the whole surface development of the frame 11 and the padding 18, hiding them completely from view.
  • the present example not part of the invention concerns a method to obtain a shell 10 for seats, which comprises the following steps identified in a non-rigid order:
  • the method also provides the following steps:
  • preparation is achieved by cutting, shaping and welding the round pieces 13 in the desired shapes and sizes to form the individual sub-frames 11a-11d which make up the frame 11 in which one or more functional zones 12 are comprised.

Landscapes

  • Seats For Vehicles (AREA)

Claims (11)

  1. Schale für einen Sitz (100), umfassend:
    - einen Rahmen (11), der aus mehreren Unterrahmen (11a-11d) besteht, welche mit mindestens einem runden Metallstück (13) erhalten sind, wobei die Unterrahmen (11a-11d) eingerichtet sind, um jeweils mindestens eine funktionelle Zone (12) der Schale (10) zu definieren;
    - mehrere Netze (14), die an mindestens einigen der Unterrahmen (11a-11d) angebracht sind, dadurch gekennzeichnet, dass jedes der Netze (14) in einer Weise geformt ist, die zu der Form des spezifischen Unterrahmens (11a-11d) passt, welchem es zugeordnet ist,
    wobei in einem oder mehreren Unterrahmen (11a-11d), und auf mindestens einem Netz (14), mindestens eine Polsterung (18), welche aus expandiertem Material hergestellt ist, positioniert ist, mit definierter Dichte und Steifigkeit, und darin, dass eine Abdeckung aus verstärkendem Material (19) mindestens die Polsterung (18) und den Rahmen (11) abdeckt und die Polsterung (18) in Bezug auf das Netz (14) in Position hält.
  2. Schale nach Anspruch 1, dadurch gekennzeichnet, dass die Polsterung (18) auf das runde Stück (13) und/oder das Netz (14) mittels Kleben an die Unterrahmen (11a-11d) und/oder an das Netz (14) aufgebracht ist.
  3. Schale nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Schale (10) eine Trägerbasis (15) umfasst, welche mindestens eine Sitzebene definiert, auf der ein Benutzer sitzen kann, und eingerichtet ist, um die Schale (10) mit dem Träger (16) zu verbinden.
  4. Schale nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sich mindestens eines der runden Stücke (13) kontinuierlich entlang des Umfangsrandes erstreckt, der durch die Schale (10) definiert ist.
  5. Schale nach Anspruch 1, dadurch gekennzeichnet, dass ein jeweiliges Netz (14) mindestens zwei der Unterrahmen (11a-11d) zugeordnet ist und das Netz (14), welches einem der Unterrahmen (11a-11d) zugeordnet ist, eine von dem Netz (14), welches dem anderen der Unterrahmen (11a-11d) zugeordnet ist, unterschiedliche strukturelle Steifigkeit aufweist.
  6. Schale nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sie mindestens zwei Polsterungen (18) umfasst, welche sich voneinander unterscheiden und eine definierte und voneinander unterschiedliche Dichte und Steifigkeit aufweisen.
  7. Schale nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das runde Metallstück (13) einen Durchmesser mit einem Wert von zwischen 8 mm und 16 mm, vorzugsweise von zwischen 10 mm und 12 mm aufweist.
  8. Schale nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Netz (14) in Beziehung zu der spezifischen funktionellen Zone (12) dreidimensional geformt ist.
  9. Schale nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das verstärkende Material (19) die gesamte Flächenentwicklung des Rahmens (11) und die Polsterung (18) abdeckt, wobei es sie vollständig von außen unsichtbar verbirgt.
  10. Sitz, umfassend einen Träger (16) und eine Schale (10) nach einem der vorangehenden Ansprüche.
  11. Verfahren zum Erhalten einer Schale (10) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    - Herstellen eines Rahmens (11), der aus mehreren Unterrahmen (11a-11d) besteht, mit mindestens einem runden Metallstück (13), wobei die Unterrahmen (11a-11d) funktionelle Zonen (12) der Schale (10) definieren;
    - Schneiden an mehreren Netzen jedes Netzes (14), welches in einer Weise geformt ist, die zu der Form des spezifischen Unterrahmens (11a-11d) passt, welchem es zugeordnet ist;
    - Integrieren der Netze (14) mit den Unterrahmen (11a-11d) ;
    - Positionieren, in mindestens einigen der Unterrahmen (11a-11d) und auf mindestens einem Teil eines Netzes (14), einer Polsterung (18), die aus expandiertem Material hergestellt ist, mit definierter Dichte und Steifigkeit;
    - Abdecken mindestens der Polsterung (18) und des Rahmens (11) mit einem verstärkenden Material (19) das die Polsterung (18) in Bezug auf das Netz (14) in Position hält.
EP17716621.2A 2016-02-24 2017-02-24 Schale für sitze und entsprechendes verfahren Active EP3419478B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB2016A001022A ITUB20161022A1 (it) 2016-02-24 2016-02-24 Scocca per sedute e relativo metodo
PCT/IB2017/051090 WO2017145114A1 (en) 2016-02-24 2017-02-24 Shell for seats, and corresponding method

Publications (2)

Publication Number Publication Date
EP3419478A1 EP3419478A1 (de) 2019-01-02
EP3419478B1 true EP3419478B1 (de) 2020-05-27

Family

ID=56027064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17716621.2A Active EP3419478B1 (de) 2016-02-24 2017-02-24 Schale für sitze und entsprechendes verfahren

Country Status (5)

Country Link
US (1) US20190059592A1 (de)
EP (1) EP3419478B1 (de)
CA (1) CA3014865A1 (de)
IT (1) ITUB20161022A1 (de)
WO (1) WO2017145114A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD987318S1 (en) * 2021-02-26 2023-05-30 Arper S.P.A. Armchair

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Also Published As

Publication number Publication date
US20190059592A1 (en) 2019-02-28
EP3419478A1 (de) 2019-01-02
WO2017145114A1 (en) 2017-08-31
CA3014865A1 (en) 2017-08-31
ITUB20161022A1 (it) 2017-08-24

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