EP0187199A1 - Lath for an underframe - Google Patents

Lath for an underframe Download PDF

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Publication number
EP0187199A1
EP0187199A1 EP85111854A EP85111854A EP0187199A1 EP 0187199 A1 EP0187199 A1 EP 0187199A1 EP 85111854 A EP85111854 A EP 85111854A EP 85111854 A EP85111854 A EP 85111854A EP 0187199 A1 EP0187199 A1 EP 0187199A1
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EP
European Patent Office
Prior art keywords
layer
layers
female connector
thermosetting
plastic material
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.)
Granted
Application number
EP85111854A
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German (de)
French (fr)
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EP0187199B1 (en
Inventor
Hermann Hüssler
Günter c/o Teutoburger Sperrholzwerk Don
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.)
Huelsta Werke Huels GmbH and Co KG
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Huelsta Werke Huels GmbH and Co KG
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Publication date
Application filed by Huelsta Werke Huels GmbH and Co KG filed Critical Huelsta Werke Huels GmbH and Co KG
Priority to AT85111854T priority Critical patent/ATE48747T1/en
Publication of EP0187199A1 publication Critical patent/EP0187199A1/en
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Publication of EP0187199B1 publication Critical patent/EP0187199B1/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
    • A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
    • A47C23/06—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using wooden springs, e.g. of slat type ; Slatted bed bases
    • A47C23/061—Slat structures

Definitions

  • the invention relates to a female connector for a slatted frame for seating and / or reclining furniture according to the preamble of the main claim.
  • Female slats are used in particular as mattress pads in beds, loungers or upholstered furniture and consist of veneer layers glued together and pressed by pressure and heat, the natural fibers of which run in the longitudinal direction of the female slat.
  • a female connector has become known, which is not surface-coated, so that moisture can penetrate into the upper layers of wood.
  • the property of this known female connector is to be maintained or improved, if necessary, by providing a wide middle layer made of plastic, which is intended to provide the actual spring property of the slat.
  • This plastic layer is not described as impermeable to water, so that the moisture coming into contact with the female connector from up to can get into the lower area of the female connector and thereby the most stressed layers are exposed to the influence of moisture.
  • This known female connector therefore does not have a long service life.
  • the invention has for its object to provide a rigid spring bar, in which the swelling of width is reduced when moisture enters.
  • thermoset layer provided according to the invention has the advantage that on the one hand it represents an additional moisture barrier when moistening the female connector from one side and that it also limits the swelling of the width of the wood so that the outer film is no longer stretched to its breaking point and consequently no longer tears.
  • a stabilization of the female connector is also achieved, so that its original shape is better preserved with prolonged use.
  • thermosetting plastic as a barrier layer in the middle of the strip also has the advantage that the thickness of the wood between the respective barrier layers is small and thus only small bending moments occur which could lead to the opening of the glue joint.
  • the thermoset layer provided according to the invention reduces the swelling capacity of the individual veneer wood layers, so that less moisture is retained in the female connector since less moisture has also been absorbed. This makes it easier for the female connector to return to its original shape after the load has been removed.
  • one or more layers of tensile and shear-resistant material in the orthogonal-isotropic fiber direction are arranged between the veneer wood layers, which together with the cover film layers restrict the possible swelling of the veneer wood layers to such an extent that there can be no overextension of the outer films and therefore no crack formation.
  • thermoset layers D are arranged in or near the neutral fiber.
  • thermoset layers D are impregnated with thermosetting resins, which, after hardening, are used in the press Ensure a shear-proof connection with the neighboring layers of veneer wood.
  • the elongation at break of the impregnating resin used has to be adapted to that of the outer films, while the other properties can vary depending on the task.

Landscapes

  • Laminated Bodies (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

1. Spring strip for a slatted grid for articles of furniture used for sitting or lying on, which strip comprises a plurality of wood veneer layers laid with their grain in the same direction, and, arranged between these, at least one layer of thermosetting synthetic plastic material resistant to tensile stress, these layers being glued and pressed together, the spring strip being given improved surface quality by curable synthetic resin films and optionally varnishing, characterised in that a) the layer of thermosetting synthetic plastic material (D) is made resistant to shear and tension at least in the transverse direction of the wood veneer layers, b) the layer of thermosetting synthetic plastic material (D) is arranged on, or in the vicinity of, the neutral fiber of the wood veneer layers, c) the layer of thermosetting synthetic plastic material (D) is impervious to moisture.

Description

Die Erfindung bezieht sich auf eine Federleiste für einen Lattenrost für Sitz- und/oder Liegemöbel gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a female connector for a slatted frame for seating and / or reclining furniture according to the preamble of the main claim.

Federleisten finden insbesondere als Matratzenunterlagen in Betten, Liegen oder bei Polstermöbeln Anwendung und bestehen aus miteinander verleimten und durch Druck und Wärme verpreßten Furnierschichten, deren natürliche Fasern in Längsrichtung der Federleiste verlaufen.Female slats are used in particular as mattress pads in beds, loungers or upholstered furniture and consist of veneer layers glued together and pressed by pressure and heat, the natural fibers of which run in the longitudinal direction of the female slat.

Es ist bekannt, derartige Federleisten auf der Ober-und Unterseite mit einer jeweils an der Außenseite aufgetragenen Schicht aus kunststoffgetränkten Zellstoffvliesen zu versehen, um auf diese Weise die Biegefestigkeit zu erhöhen und den Feuchtigkeitsdurchtritt durch die Flächen zu verringern bzw. zu verhindern. Es hat sich dabei aber als nachteilig herausgestellt, daß diese Oberflächen zwar wasserdicht sind, aber durch die Kanten der Federleisten, die nicht beschichtet sind, Feuchtigkeit eindringen kann. Hierbei ist es bekanntgeworden, den Feuchtigkeitszutritt durch nachträgliches Lackieren zu verringern.It is known to provide such female connectors on the top and bottom with a layer of plastic-impregnated cellulose fleece applied to the outside in order to increase the bending strength and to reduce or prevent the passage of moisture through the surfaces. It has been found to be disadvantageous, however, that although these surfaces are watertight, moisture can penetrate through the edges of the female connectors, which are not coated. It has become known to reduce the ingress of moisture through subsequent painting.

Es hat sich dabei herausgestellt, daß bei längerem Gebrauch unter hoher Feuchtigkeitsbelastung die Furnierholzschichten in der Breite quellen. Hierbei werden die abdeckenden Kunststoffschichten überdehnt und reißen. Durch die entstehenden Risse kann dann Feuchtigkeit zusätzlich eindringen, so daß der Schutz der Oberfläche durch die aufgelegte Filmschicht verringert ist und die Federeigenschaft der Federleiste erheblich beeinträchtigt wird.It has been found that for a long time Use under high moisture loads to swell the plywood layers in width. The covering plastic layers are overstretched and tear. The resulting cracks can then additionally penetrate moisture, so that the protection of the surface by the applied film layer is reduced and the spring properties of the female connector are considerably impaired.

Aus dem DE-GM 82 19 053 ist es bekannt, die Gebrauchseigenschaften einer Federleiste dadurch zu verbessern, daß der plastischen Verformung der Federleiste bei Beanspruchung entgegengewirkt wird, wobei insbesondere der E-Modul der Federleiste auch unter Feuchtigkeitseinwirkung erhalten bleiben soll. Bei der bekannten Einrichtung wird dies dadurch erreicht, daß die Federleiste unterhalb ihrer Mittelebene mindestens ein Glasfasergelege aufweist, deren Hauptfäden sich in Furnierrichtung erstrecken. Durch eine solche Anordnung wird die Beeinflussung der übrigen Schichten durch Feuchtigkeit nicht ausgeschaltet und derart kann die Gebrauchseigenschaft einer Federleiste nicht verbessert werden.From DE-GM 82 19 053 it is known to improve the performance properties of a female connector by counteracting the plastic deformation of the female connector when stressed, in particular the elasticity of the female connector should be retained even when exposed to moisture. In the known device, this is achieved in that the female connector has at least one glass fiber fabric below its central plane, the main threads of which extend in the veneer direction. With such an arrangement, the influence of moisture on the remaining layers is not switched off, and the usability of a female connector cannot be improved in this way.

Aus der CH-PS 504 860 ist eine Federleiste bekanntgeworden, die nicht oberflächenbeschichtet ist, so daß damit in die oberen Holzschichten die Feuchtigkeit eindringen kann. Die Gebrauchseigenschaft dieser bekannten Federleiste soll dadurch erhalten bzw. ggf. verbessert werden, daß eine breite Mittelschicht aus Kunststoff vorgesehen wird, die die eigentliche Federeigenschaft der Latte erbringen soll. Diese Kunststoffschicht wird nicht als wasserundurchlässig beschrieben, so daß die von oben in Kontakt mit der Federleiste gelangende Feuchtigkeit bis in den unteren Bereich der Federleiste gelangen kann und dadurch die am meisten beanspruchten Schichten dem Feuchtigkeitseinfluß ausgesetzt werden. Diese bekannte Federleiste weist daher keine hohe Lebensdauer auf.From CH-PS 504 860 a female connector has become known, which is not surface-coated, so that moisture can penetrate into the upper layers of wood. The property of this known female connector is to be maintained or improved, if necessary, by providing a wide middle layer made of plastic, which is intended to provide the actual spring property of the slat. This plastic layer is not described as impermeable to water, so that the moisture coming into contact with the female connector from up to can get into the lower area of the female connector and thereby the most stressed layers are exposed to the influence of moisture. This known female connector therefore does not have a long service life.

Der Erfindung liegt die Aufgabe zugrunde, eine biegefeste Federleiste zu schaffen, bei der bei Feuchtigkeitseintritt die Breitenquellung vermindert wird.The invention has for its object to provide a rigid spring bar, in which the swelling of width is reduced when moisture enters.

Diese der Erfindung zugrundeliegende Aufgabe wird durch die Lehre des Hauptanspruches gelöst.This object on which the invention is based is achieved by the teaching of the main claim.

Vorteilhafte Ausgestaltungen sind in den Unteransprüchen erläutert.Advantageous configurations are explained in the subclaims.

Die erfindungsgemäß vorgesehene Duroplastschicht hat den Vorteil, daß sie einerseits eine zusätzliche Feuchtsperre bei der Befeuchtung der Federleiste von einer Seite her darstellt und daß sie außerdem die Breitenquellung des Holzes einschränkt, so daß der Außenfilm nicht mehr bis zu seiner Bruchgrenze gedehnt wird und folglich nicht mehr reißt. Durch Erhöhung der Schubfestigkeit wird ferner eine Stabilisierung der Federleiste erreicht, so daß auch ihre Ursprungsform bei längerem Gebrauch besser erhalten wird.The thermoset layer provided according to the invention has the advantage that on the one hand it represents an additional moisture barrier when moistening the female connector from one side and that it also limits the swelling of the width of the wood so that the outer film is no longer stretched to its breaking point and consequently no longer tears. By increasing the shear strength, a stabilization of the female connector is also achieved, so that its original shape is better preserved with prolonged use.

Die Anordnung des Duroplasten als Sperrschicht in der Mitte der Leiste hat auch den Vorteil, daß die Holzstärke zwischen der jeweiligen Sperrlage gering ist und somit nur geringe Biegemomente auftreten, die zur öffnung der Verleimungsfuge führen könnten. Durch die erfindungsgemäß vorgesehene Duroplastschicht wird das Quellvermögen der einzelnen Furnierholzschichten verringert, so daß weniger Feuchtigkeit in der Federleiste zurückgehalten wird, da auch weniger Feuchtigkeit aufgenommen worden ist. Hierdurch nimmt die Federleiste nach Entfernen der Last leichter ihre ursprüngliche Form wieder auf.The arrangement of the thermosetting plastic as a barrier layer in the middle of the strip also has the advantage that the thickness of the wood between the respective barrier layers is small and thus only small bending moments occur which could lead to the opening of the glue joint. The thermoset layer provided according to the invention reduces the swelling capacity of the individual veneer wood layers, so that less moisture is retained in the female connector since less moisture has also been absorbed. This makes it easier for the female connector to return to its original shape after the load has been removed.

Ein Ausführungsbeispiel wird nachfolgend anhand der Zeichnung erläutert. Die Zeichnung zeigt dabei in

  • Fig. 1 eine Seitenansicht einer Federleiste in verkleinertem Maßstab und in
  • Fig. 2 einen Querschnitt entsprechend der Schnittlinie 2 - 2 in Fig. 1 mit einer zusätzlichen Mittel-Sperrschicht aus Duroplast.
An embodiment is explained below with reference to the drawing. The drawing shows in
  • Fig. 1 is a side view of a female connector on a reduced scale and in
  • Fig. 2 shows a cross section along the section line 2 - 2 in Fig. 1 with an additional middle barrier layer made of thermoset.

Erfindungsgemäß werden zwischen den Furnierholzschichten eine oder mehrere Lagen aus zug- und schubfestem Werkstoff in orthogonal-isotroper Faserrichtung angeordnet, die zusammen mit den Deckfilmlagen die mögliche Quellung der Furnierholzschichten so weit einschränken, daß mit Sicherheit keine Oberdehnung der Außenfilme und damit keine Rißbildung auftreten kann.According to the invention, one or more layers of tensile and shear-resistant material in the orthogonal-isotropic fiber direction are arranged between the veneer wood layers, which together with the cover film layers restrict the possible swelling of the veneer wood layers to such an extent that there can be no overextension of the outer films and therefore no crack formation.

Um das elastische Verhalten der Federleiste auch nicht durch Versteifung, zu ändern, sind die Duroplastschichten D in oder in der Nähe der neutralen Faser angeordnet.In order not to change the elastic behavior of the female connector by stiffening, the thermoset layers D are arranged in or near the neutral fiber.

Um den Schubverband nicht zu schwächen, sind die Duroplastschichten D mit duroplastischen Harzen getränkt, die nach dem Aushärten in der Presse eine schubfeste Verbindung mit den benachbarten Furnierholzschichten sicherstellen.In order not to weaken the shear bandage, the thermoset layers D are impregnated with thermosetting resins, which, after hardening, are used in the press Ensure a shear-proof connection with the neighboring layers of veneer wood.

Um die Sperrwirkung der Duroplastschichten oder -schicht mit geringem Materialeinsatz zu erreichen, ist die Bruchdehnung des verwendeten Tränkharzes dem der Außenfilme anzupassen, während die anderen Eigenschaften entsprechend der Aufgabenstellung unterschiedlich sein können.In order to achieve the barrier effect of the thermosetting layers or layers with little material, the elongation at break of the impregnating resin used has to be adapted to that of the outer films, while the other properties can vary depending on the task.

Claims (4)

1. Federleiste für einen Lattenrost für Sitz-und/oder Liegemöbel, die aus mehreren nicht gesperrten Furnierholzschichten und wenigstens einer zwischen diesen angeordneten zugfesten Duroplastschicht besteht, die miteinander verleimt und verpreßt sind, wobei die Federleiste durch aushärtbare Kunstharzfilme und ggf. Lackieren oberflächenvergütet ist, dadurch gekennzeichnet, daß a) die Duroplastschicht (D) zwischen den mittleren Lagen der Furnierholzschichten angeordnet ist, b) die Duroplastschicht (D) mindestens in Querrichtung der Furnierholzschichten schub- und zugfest ausgebildet ist, c) die Duroplastschicht (D) feuchtigkeitsundurchlässig ist. 1. female connector for a slatted frame for seating and / or reclining furniture, which consists of several non-blocked veneer wood layers and at least one tensile thermosetting layer arranged between them, which are glued and pressed together, the female connector being surface-hardened by hardenable synthetic resin films and possibly painting, characterized in that a) the thermoset layer (D) is arranged between the middle layers of the veneer wood layers, b) the thermoset layer (D) is designed to be shear and tensile resistant at least in the transverse direction of the veneer wood layers, c) the thermoset layer (D) is impermeable to moisture. 2. Federleiste nach Anspruch 1, dadurch gekennzeichnet, daß die Duroplastschicht (D) als Klebstoffschicht ausgebildet ist.2. Female connector according to claim 1, characterized in that the thermosetting layer (D) is designed as an adhesive layer. 3. Federleiste nach Anspruch 1 und 2, bei der die Duroplastschicht eine Verstärkungseinlage aufweist, dadurch gekennzeichnet, daß die Verstärkungseinlage aus einem Zelluloseträger besteht.3. Female connector according to claim 1 and 2, in which the thermosetting layer has a reinforcing insert, characterized in that the reinforcing insert consists of a cellulose carrier. 4. Federleiste nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß mehrere Duroplastschichten (D) im mittleren Bereich zwischen den mittleren Lagen aus Furnierholzschichten angeordnet sind.4. Female connector according to claim 1 to 3, characterized in that a plurality of thermosetting layers (D) are arranged in the central region between the middle layers of veneer wood layers.
EP85111854A 1984-10-26 1985-09-19 Lath for an underframe Expired EP0187199B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85111854T ATE48747T1 (en) 1984-10-26 1985-09-19 STRIP FOR A SLATTED FRAME.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3439276A DE3439276C1 (en) 1984-10-26 1984-10-26 Female connector for a slatted frame for seating and / or reclining furniture
DE3439276 1984-10-26

Publications (2)

Publication Number Publication Date
EP0187199A1 true EP0187199A1 (en) 1986-07-16
EP0187199B1 EP0187199B1 (en) 1989-12-20

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ID=6248853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111854A Expired EP0187199B1 (en) 1984-10-26 1985-09-19 Lath for an underframe

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EP (1) EP0187199B1 (en)
AT (1) ATE48747T1 (en)
DE (1) DE3439276C1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0663168A1 (en) * 1994-01-12 1995-07-19 Werzalit Ag + Co. A slat of laminated wood for a slatted bed-base
AT401861B (en) * 1991-04-17 1996-12-27 Kuennemeyer Thomas USE OF A LOW-SHAPED CUT-OUT FROM A CHIPBOARD AS A SPRING BAR FOR SPRING FRAME

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9407676U1 (en) * 1994-05-09 1994-07-28 Schnieder Karl Heinz Slatted board

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH504860A (en) * 1969-03-07 1971-03-31 Metzger Josef Lättli, in particular for seating and reclining furniture
DE8219053U1 (en) * 1982-11-18 Th. Goldschmidt Ag, 4300 Essen Spring bar as an element of a slatted frame

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7107434U (en) * 1971-06-09 Furnier Und Sperrholzwerk Werz J Kg Preferably made of veneers glued together
DE2209448A1 (en) * 1972-02-29 1973-09-06 Werz Furnier Sperrholz SPRING BAR MADE OF VENEER GLUED TOGETHER
DE2312049C2 (en) * 1973-03-10 1975-02-27 Fa. Robert Kahl, Rokado, 4755 Holzwickede Spring wood strip with plastic cover for bed frame

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8219053U1 (en) * 1982-11-18 Th. Goldschmidt Ag, 4300 Essen Spring bar as an element of a slatted frame
CH504860A (en) * 1969-03-07 1971-03-31 Metzger Josef Lättli, in particular for seating and reclining furniture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT401861B (en) * 1991-04-17 1996-12-27 Kuennemeyer Thomas USE OF A LOW-SHAPED CUT-OUT FROM A CHIPBOARD AS A SPRING BAR FOR SPRING FRAME
EP0663168A1 (en) * 1994-01-12 1995-07-19 Werzalit Ag + Co. A slat of laminated wood for a slatted bed-base

Also Published As

Publication number Publication date
DE3439276C1 (en) 1993-02-11
ATE48747T1 (en) 1990-01-15
EP0187199B1 (en) 1989-12-20

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