EP0121049B1 - Siège ou dossier formé de mousse - Google Patents

Siège ou dossier formé de mousse Download PDF

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Publication number
EP0121049B1
EP0121049B1 EP84101156A EP84101156A EP0121049B1 EP 0121049 B1 EP0121049 B1 EP 0121049B1 EP 84101156 A EP84101156 A EP 84101156A EP 84101156 A EP84101156 A EP 84101156A EP 0121049 B1 EP0121049 B1 EP 0121049B1
Authority
EP
European Patent Office
Prior art keywords
foamed plastics
plastics material
foamed
seat
cushion
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.)
Expired
Application number
EP84101156A
Other languages
German (de)
English (en)
Other versions
EP0121049A1 (fr
Inventor
Friedhelm Albers
Hermann Vauth
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.)
Vauth & Sohn KG
Original Assignee
Vauth & Sohn KG
Vauth & Sohn KG
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 Vauth & Sohn KG, Vauth & Sohn KG filed Critical Vauth & Sohn KG
Priority to AT84101156T priority Critical patent/ATE33922T1/de
Publication of EP0121049A1 publication Critical patent/EP0121049A1/fr
Application granted granted Critical
Publication of EP0121049B1 publication Critical patent/EP0121049B1/fr
Expired legal-status Critical Current

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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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/18—Seat parts having foamed material included in cushioning part
    • A47C7/20—Seat parts having foamed material included in cushioning part with reinforcement in the foam layer
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C5/00—Chairs of special materials
    • A47C5/12—Chairs of special materials of plastics, with or without reinforcement
    • A47C5/125—Chairs of special materials of plastics, with or without reinforcement completely made of foam material

Definitions

  • the invention relates to seat and / or backrest cushions made of a first foam, which is made of an open-pore polyurethane foam with a certain indentation hardness and density, in which, transverse to the seat direction, at least one foam body to form a foam stiffener that gives the cushion higher indentation hardness than that of the first foam gives, is foamed and the foam body itself form the stiffeners.
  • a foam cushion which consists of a foamed foam body, in which the foam process is carried out so that the foam has a denser and firmer consistency at the boundary layer with the foam body and thus forms a stiffening.
  • the foam body is preferably traversed by vertical channels, in which the boundary layer forms rib-like during the foaming process.
  • the disadvantage here is that the increased density of the boundary layer leads to an increase in the weight of the cushion.
  • the dense, skin-like boundary layer is closed-pore, so that the cushion has increased flammability.
  • Closed-pore foam is also known, which is produced when the foam is set completely normally. This has a much higher indentation hardness than open-cell foam and it is only slightly compressible. It is therefore of limited use for upholstery, even if it is foamed to a much lower specific weight compared to the open-cell foam.
  • panels made of open-pore melamine foam which have a high indentation hardness with a relatively low density. This material is not suitable for foaming in molds and it is too weak to be used directly for upholstery.
  • the foam bodies consist of a second foam, namely closed-pore polyurethane foam or open-pore melamine foam or the like, the density of which is lower and the indentation hardness higher than that of the first foam.
  • the stiffeners made of harder foam are lighter but less compressible. This results in an increased so-called comfort factor in accordance with the known test methods.
  • the insoles are arranged in such a way that they ergonomically support the neck, lumbar, spine and thigh support areas or at least prevent people from sinking completely, which leads to unpleasant congestion in the veins and lymph vessels, especially when sitting for long periods.
  • Such upholstery can be produced using known foam technology, with either foam bodies of relatively higher indentation hardness cut into plates or prisms being inserted into the mold before the upholstery is foamed, or into a milled upholstery body with relatively lower indentation hardness with corresponding cavities, subsequently harder material, preferably low density, which is not later subjected to a whaling process, is foamed. With a suitable shape of the cavities, a special shape for foaming the stiffeners can be omitted.
  • open-pore polyurethane foam For the foam of relatively low indentation hardness, the use of open-pore polyurethane foam is recommended, and closed-pore polyurethane foam or an open-pore melamine foam is expediently used as the harder foam.
  • closed-pore polyurethane foam or an open-pore melamine foam is expediently used as the harder foam.
  • the latter has the advantage that the cushion shows extremely low flammability.
  • the indentation hardness is to be adapted to the use in each case, and the cross-sectional proportion and the density of the stiffening body are determined from the desired comfort factor, which is derived from the progressive increase in the indentation hardness, or from minimizing weight.
  • the indentation hardness of the stiffening body is 400 N and the surrounding foam is at most 200 N; it is at least twice as hard with good dimensions.
  • the density of the stiffening body is at most only half as large as that of the rest of the foam.
  • FIGS. 1 to 6 show various advantageous configurations of upholstery and molds for their production using the foaming process.
  • an armrest cushion 12 is shown in section, the back of which is stiffened by a plate 133 made of open-cell foam, the thickness of which corresponds to about a quarter of the backrest thickness D12.
  • a prism-shaped stiffening body 134 is embedded on the back, which fills approximately one third of the cross section of the lower backrest region, which extends to the lower edge of the seat cushion 11, and thus stiffens against the lumbar region being pressed down.
  • Fig. 3 it is shown in a rear view that the plate 133 and the stiffening body 134 each from an edge 123, 123 '; 124, 124 ', which has the multiple thickness of the plate 133, is surrounded on all sides, as a result of which the cushion on the side surfaces and from above is pleasantly soft and elastic.
  • a plate 133 (FIG. 1a) with a wave or knob structure 133a can advantageously also be used to produce a good connection. This also results in a steadily progressive increase in the cushion resistance with increasing compression of the cushion.
  • FIG. 1 also shows a cross section of a seat cushion which is stabilized in the support areas of the spine and the legs by stiffening bodies 131, 132.
  • the depth of the stiffening bodies corresponds to more than half of the padding thickness, so that the remaining softly padded area has sufficient elasticity, corresponding to a pleasant padding.
  • the stiffening bodies are each surrounded by lateral areas 114, 114 ', 115, 115' (FIG. 2) and a front area 111 and rear area 112, which is encapsulated with soft open-cell foam, which is pleasant when touched, bumped or leaned against.
  • the stiffening body 132 for supporting the spine is foamed in slightly below the seat surface, as a result of which a compromise between stiffness and cushioning effect is achieved.
  • FIGS. 4 and 5 show cross sections through molds for foaming a seat or armrest cushion in the filled, foamed state.
  • the stiffeners 134, 135, 136 are attached to pins 43, 44; 48, 49a, b, c, kept in the shape.
  • the foam material fills all the free spaces by flowing around the stiffeners laterally and / or passing through punched-outs or recesses.
  • the plates 135, 136 are bent in a U-shape at the ends in the example shown, whereby the desired stiffening of the spine and thigh support or neck and lumbar areas is achieved and a spring-elastic effect of the stiffer insert is produced, which is known for a U-arch corresponds to a constant force curve with increasing deformation and receives a slightly increasing characteristic due to the surrounding open-pore material.
  • a somewhat softer upholstery is obtained if the plate is placed on the underside of the seat cushion 11 or the back of the backrest cushion 12 and the U-bends are mounted in the opposite direction. If cushions are used that are symmetrical from bottom to top or from back to front, they can be turned, depending on the desired elasticity of the seat or armrest.
  • FIG. 6 shows an armrest cushion of the same basic structure in section, but which is produced in a different way and thereby provides further design freedom for achieving optimal ergonomics.
  • the open-pore upholstery part is produced in a first foaming process.
  • a space for the stiffening is cut out according to the shape, which can be optimally designed according to needs, that is, in several directions, for. B. for a lumbar reinforcement and additionally for longitudinal ribs in the backrest (not shown) is shaped to run.
  • This cavity or several are foamed with closed-cell foam after the milling and tempering of the upholstery part produced first; it therefore hardens in a form suitable for the body. If the cavity is only open on one side, as shown, when the layer is open at the top, the foam can be introduced without any further surrounding shape and foam and harden in a tempering space, which makes special tools unnecessary.
  • the setting of the density of the stiffeners can also be chosen to be higher and the cross-section smaller, which results in further options for designing the upholstery characteristic.
  • the outer contours can take up Menden seat frame can be adapted accordingly and single or multiple seats or a piece of armchair / seat cushion in the specified manner and with the advantageous properties shown.
  • the density of the open-pored material can be reduced compared to the known upholstery, which results in additional material and weight savings.
  • a further advantageous embodiment results from the provision of preferably undercut recesses 138, 138 'on the rear or underside of the upholstery, specifically in the closed-pore material, which are used for releasably fastening the upholstery to profile strips in the frame. They simply replace the usual Velcro straps for this purpose. The strength of the material provides the necessary support. Instead of the recesses, protruding ribs can also be provided, which engage in corresponding recesses in the frame.

Landscapes

  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Laminated Bodies (AREA)

Claims (9)

1. Siège et/ou dossier formé en mousse (11, 12) à l'aide d'une première mousse de polyuréthane à cellules ouvertes d'une dureté à la pénétration et d'une densité déterminées, dans laquelle, transversalement par rapport au sens du siège, un corps en mousse (131-137) est incorporé par moassage en vue de former un raidissement en mousse, conférant au rembourrage une dureté à la pénétration plus élevée que celle de la mousse première, des corps en mousse (131-137) formant eux-mêmes les raidissements, caractérisé par le fait que les corps en mousse (131-137) consistent en une seconde mousse, à savoir : en mousse polyuréthane à cellules fermées ou mousse méla- mine à cellules ouvertes, ou mousse équivalente, dont la densité est plus faible et la dureté à la pénétration plus élevée que celles de la mousse première.
2. Siège et/ou dossier formé en mousse selon spécification 1, caractérisé par le fait que la dureté à la pénétration de la seconde mousse est au moins du double de celle de la première mousse et sa densité tout au plus égale à la moitié de celle de cette première mousse.
3. Dossier formé en mousse selon l'une des spécifications 1 ou 2, caractérisé par le fait que le raidisseur (133), de préférence sous la forme d'une plaque formée de façon appropriée à l'anatomie, et présentant une épaisseur pouvant aller du tiers au cinquième de l'épaisseur du dossier (12), est moussé, de préférence, dans le secteur opposé au dos de la personne assise, et qu'une bordure (123, 123'), présentant une épaisseur égale à une ou plusieurs fois l'épaisseur de la plaque à base de la première mousse, entoure, de préférence, de toutes parts la plaque.
4. Dossier formé en mousse selon l'une des spécifications 1 ou 2, caractérisé par le fait que le raidisseur (136) consiste en une plaque, dont l'épaisseur correspond à peu près à une épaisseur allant du quart au sixième de l'épaisseur du dossier formé en mousse, et que cette plaque est repliée en forme de U (136e. 136d) dans le secteur des reins et/ou de la nuque et pliée en arrière dans le secteur intermédiaire (136e).
5. Dossier formé en mousse selon l'une des spécifications 1 ou 2, caractérisé par le fait que, dans la partie inférieure, se trouvant située à la hauteur du siège formé en mousse, le corps de raidissement (134), correspondant dans sa section transversale à peu près à une dimension allant du quart au tiers de la section transversale totale dudit secteur, est moussé à l'arrière.
6. Siège formé en mousse selon l'une des spécifications 1 ou 2, caractérisé par le fait que, dans sa partie antérieure et/ou sa partie postérieure, le corps de raidissement (131, 132) est incorporé par moussage, et présente, respectivement, une section transversale rectangulaire ou carrée, et que ses dimensions de longueur et de profondeur représentent chacune plus de la moitié de la hauteur du rembourrage, et que, ce faisant, ce corps de raidissement est si long et disposé de sorte qu'il se trouve entouré, de toutes parts, par une bordure (111, 112, 114, 114', 115, 115') à base de la première mousse et dont l'épaisseur correspond à environ la moitié de l'épaisseur du corps de raidissement concerné.
7. Siège formé en mousse selon l'une des spécifications 1 ou 2, caractérisé par le fait que le corps de raidissement (135) est moussé dans le siège formé en mousse (11), sous forme d'une plaque dont l'épaisseur est environ du quart au sixième de l'épaisseur du rembourrage, cette plaque étant repliée en arc en forme de U (135c, 135d) dans la partie antérieure et/ou postérieure (135a, 135b) et s'abaisse, s'enfonçant dans la première mousse, dans le secteur médian, à une profondeur correspondant à environ à sa propre épaisseur.
8. Siège et/ou dossier formé en mousse selon l'une des spécifications 1 ou 2, caractérisé par le fait que la seconde mousse (137) est incorporée par moussage par en bas ou par derrière dans la première mousse (11) l'entourant de plusieurs côtés et que, de préférence, en dessous ou en arrière, des évidements, s'évasant de préférence vers l'arrière, (138, 138') et/ou des nervures équipent la seconde mousse, et/ou que la seconde mousse est ajourée de perforations (233) dont les dimensions sont de l'ordre de grandeur de l'épaisseur du matériel et que ces perforations (233) sont remplies avec la première mousse.
10. Siège et/ou dossier formé en mousse selon l'une des spécifications précédentes, caractérisé par le fait que la seconde mousse présente, dans le sens respectif du siège ou du dossier, une structure ondulée ou bouclée (133a), dont les dimensions correspondent, de préférence, à l'épaisseur du corps de raidissement (133, 136).
EP84101156A 1983-03-31 1984-02-04 Siège ou dossier formé de mousse Expired EP0121049B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84101156T ATE33922T1 (de) 1983-03-31 1984-02-04 Sitz- oder lehnpolster aus schaumstoff.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838309541U DE8309541U1 (de) 1983-03-31 1983-03-31 Sitz- oder lehnpolster aus geschlossen- und offenporigem schaumstoff
DE8309541U 1983-03-31

Publications (2)

Publication Number Publication Date
EP0121049A1 EP0121049A1 (fr) 1984-10-10
EP0121049B1 true EP0121049B1 (fr) 1988-05-04

Family

ID=6751806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101156A Expired EP0121049B1 (fr) 1983-03-31 1984-02-04 Siège ou dossier formé de mousse

Country Status (3)

Country Link
EP (1) EP0121049B1 (fr)
AT (1) ATE33922T1 (fr)
DE (2) DE8309541U1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07106167B2 (ja) * 1986-12-01 1995-11-15 株式会社ブリヂストン クツシヨン体
FR2836470B1 (fr) 2002-02-25 2004-07-09 J S O Matelassure en mousse de melanine et ses applications
DE102005002689B3 (de) * 2005-01-19 2006-09-21 F.S. Fehrer Automotive Foam Gmbh Polsterelement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980167A (en) * 1957-07-18 1961-04-18 Gen Motors Corp Seat construction
US3432583A (en) * 1965-05-13 1969-03-11 Uniroyal Ltd Method of moulding
GB1230764A (fr) * 1967-07-26 1971-05-05
AU430388B2 (en) * 1969-12-10 1972-11-23 TOSCANA GOMMA Sp. A Padding orthe like of cellular material
DE2052907A1 (en) * 1970-10-28 1972-05-04 Tech Akustik Gmbh & Co Moulding foamed plastics seats - esp for automobiles having differing local properties
DE2155349C3 (de) * 1971-11-08 1978-09-14 Holplast-Handel Gmbh, Steffisburg, Thun (Schweiz) Polstermöbel, das aus einem mit Weichschaumstoffauflage belegtem Hartschaumstoffkern mit eingelassenem Hartkörper hergestellt ist, und Verfahren zur Herstellung
DE2233389A1 (de) * 1972-07-07 1974-01-24 Eiselt Guenter Polsterkoerper mit einem kern aus duennwandigem kunststoff und einer polsterauflage aus schaumstoff

Also Published As

Publication number Publication date
EP0121049A1 (fr) 1984-10-10
ATE33922T1 (de) 1988-05-15
DE8309541U1 (de) 1984-01-12
DE3470833D1 (en) 1988-06-09

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