EP1053703A1 - Tipping mechanism and assembly of sofa-bed and bed equipped therewith - Google Patents

Tipping mechanism and assembly of sofa-bed and bed equipped therewith Download PDF

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Publication number
EP1053703A1
EP1053703A1 EP00420095A EP00420095A EP1053703A1 EP 1053703 A1 EP1053703 A1 EP 1053703A1 EP 00420095 A EP00420095 A EP 00420095A EP 00420095 A EP00420095 A EP 00420095A EP 1053703 A1 EP1053703 A1 EP 1053703A1
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EP
European Patent Office
Prior art keywords
bed
articulated
sofa
axis
lever
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.)
Withdrawn
Application number
EP00420095A
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German (de)
French (fr)
Inventor
Guy Covarel
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Individual
Original Assignee
Individual
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Publication date
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Publication of EP1053703A1 publication Critical patent/EP1053703A1/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
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/38—Wall beds
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/04—Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
    • A47C17/16—Seating furniture changeable to beds by tilting or pivoting the back-rest
    • A47C17/165—Seating furniture changeable to beds by tilting or pivoting the back-rest with forward tiltable back-rest, e.g. back cushion
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/52—Cabinet beds; Table beds, or like beds; Wardrobe beds

Definitions

  • the invention relates to a tilting mechanism and a sofa and bed assembly equipped with such a mechanism.
  • the apparent moment of the box spring with respect to its pivot axis is equal to the moment resulting from the weight of the bed base to which is added the moment resulting from the weight of the sofa which is eminently variable, notably jerky, depending on the degree of inclination of the bed base and the sofa.
  • the cylinders of known system does not allow to assist or compensate effectively this variable moment.
  • the mechanical connection between the sofa and the bed is such that a vertical downward force exerted on the sofa in configuration of use tends to tilt the bed base to the configuration of use of the bed, hence a risk of unexpected bed opening.
  • the invention also provides a mechanism prohibiting unexpected opening of the bed when using the sofa.
  • the invention relates to a mechanism for tilting of a sofa and bed assembly between a first configuration where the sofa is usable while the bed is folded away, and a second position where the bed is can be used while the sofa is retracted, this mechanism comprising at least one plate, articulated around a fixed axis and supporting a bed base, and means for controlling the pivoting of this plate around this axis.
  • This mechanism further includes a lever hinged on both this plate and on a control means, this lever also being articulated on a first end of a connecting rod whose second end is articulated around a fixed axis by relationship to the built.
  • the interposition of the articulated lever between the plate and the control means transforms the result of the effort generated by this control means on the plate in one moment permanently adapted to the moments due to the apparent weights of the bed base and the sofa, which allows you to assist effectively the tilting movement whatever the open position of the bed.
  • the mechanism incorporates one or more of features mentioned in the dependent claims 2 to 9.
  • the invention also relates to a sofa assembly and reads, capable of switching between a first configuration, where the sofa can be used while the bed is folded away, and a second configuration, where the bed is usable while the sofa is folded away, characterized in that it includes a tilting mechanism as above described.
  • a sofa assembly capable of switching between a first configuration, where the sofa can be used while the bed is folded away, and a second configuration, where the bed is usable while the sofa is folded away, characterized in that it includes a tilting mechanism as above described.
  • the sofa and bed assembly comprises a fixed frame 1 formed by two vertical uprights 2 and 2 'connected by an upper cross member 3.
  • a bed base 4 is articulated around an axis X 1 and fixed by compared to amounts 2 and 2 '.
  • the bed base 4 On its external face 4 a visible in FIG. 1, the bed base 4 carries a backrest 5 of a sofa 6 also comprising a seat 7 resting on the floor S by means of two feet 8.
  • the sofa 6 is equipped with two armrests 9 .
  • a bed mattress 10 is disposed against the internal face 4b of box spring 4 and can be used in the configuration of Figures 2 and 7, while the sofa 6 can be used in the configuration of Figures 1, 3 and 4.
  • the bed base 4 is supported by a structure 11 forming a foot, articulated on the external face 4 a of the bed base 4.
  • Plates are secured to the base 4 near the uprights 2 and 2 'and at the axis X 1 .
  • the plate 20 close to the upright 2 is the only one shown in the figures, it being understood that a second plate is provided on the side of the upright 2 '.
  • the plate 20 is articulated around the axis X 1 by means of a shaft 21 intended to be received in a corresponding bearing which is fixed relative to the upright 2. The plate 20 therefore allows tilting between the two aforementioned configurations.
  • a lever 22, of generally triangular shape is articulated by means of a first axis 23 on the plate 20.
  • This lever 22 is also articulated on a first end 24 a of a connecting rod 24 thanks to a second axis 25.
  • the second end 24 b of the connecting rod 24 is articulated on a fixed axis 26.
  • a box 27 is fixed against the internal face of the upright 2, this box extending between this amount and the plate 20.
  • a similar box 27 'visible in FIG. 1, is fixed against the internal face of the upright 2' to protect a second mechanism equivalent to that shown in FIGS. 3 to 7.
  • the box 27 is provided with a bearing 27 a for supporting the axis 26.
  • the lever 22 is articulated by a third axis 28 on one end 29 a of a rod 29 of a gas spring 30 whose body 31 is articulated around a fixed axis 32 supported by the box 27 at level of a second level not shown.
  • the function of the gas spring 30 is to control the tilting of the plate 20, that is to say of the bed base 4, between the two configurations of FIGS. 1 and 2 by compensating for the moments due to the apparent weights of this bed base and of this sofa with respect to the axis X 1 .
  • F 1 the force exerted by the jack 30 on the lever 22.
  • F 2 the force exerted by the connecting rod 24 on the lever 22 and we denote by F 3 the result of the forces F 1 and F 2 which is equal to the force exerted by the lever 22 on the plate 20 at the axis 23.
  • the force F 1 is permanently directed from the rod 29 towards the lever 22.
  • the direction of the force F 2 depends on the position of the plate 20.
  • the connecting rod 24 works in extension in the configuration of FIG. 3A then that it works in compression in the configuration of FIG. 7A, the force F 2 varying between these configurations.
  • the resultant F 3 therefore has a variable value, adapted to the moments exerted on the plate 20 by the apparent weights of the bed base 4 and of the sofa 6, as a function of the angular position of this bed base around the axis X 1 .
  • the use of lever 22 makes it possible to combine the forces F 1 and F 2 generated by the gas spring 30 and by the connecting rod 24, in order to permanently create a resultant F 3 on the plate 20 adapted to these moments.
  • a bell crank arm 40 is articulated at a first end 40 about a shaft 41 fixed relative to the frame 1 and supported by a housing of the bearing 27. At its second end 40b, the arm 40 is articulated by an axis 42 on a frame 43 of the foot 8. This frame is, moreover, articulated by a pin 44 on the seat 7 of the sofa.
  • the armrest 9 is hinged around an axis 46 at the end 40 b of the reference arm 40, the axes 42 and 46 being parallel and separate.
  • the armrest 9 is, moreover, articulated to the seat 7 by means of an axis 47. This makes it possible to create an eccentric articulation at the level of the junction zone between the deflection arm, the foot and the armrest of the sofa. , so that the movement of the armrest can be differentiated from the movement of the foot between the two configurations of the assembly.
  • the armrest 9 works in extension to support the front part of the seat 7.
  • a return lever 50 is articulated around an axis 51 fixed relative to the frame 1 and supported by a bearing of the box 27.
  • the lever 50 is articulated by means of an axis 52 on a first end 53 a of an angled lever 53 whose second end 53 b is articulated around an axis 54 fixed on the plate 20.
  • the pivoting movement of the plate 20 around the axis X 1 induces a pivoting movement of the lever 53 around the axis 54 and, thereby, a pivoting movement of the return lever 50 around the axis 51.
  • the return lever 50 is also articulated by an axis 55 on a first end 56 has a connecting rod 56, the second of which end 56 b is articulated by an axis 57 on a yoke 58 secured to the deflection arm 40. Thanks to the articulation of the deflection lever 50 and of the connecting rod 56, the pivoting movement of the deflection lever 50 around the fixed axis 51, which is generated by the pivoting of the plate 20, is transmitted to the bra s 40, which makes it possible to pass it from the configuration of FIGS. 3 and 4 to that of FIG. 7 passing through the positions of FIGS. 5 and 6.
  • the deflection arm 40, the deflection lever 50 and the lever 22 allow to transmit to the foot of the sofa and the elements it supports tilting movements of the plate.
  • the geometry of the bent arm 40, of the return lever 50 and connecting rod 56 is such that these elements constitute a locked toggle joint in the configuration of Figures 1, 3 and 4 and susceptible to resist the great efforts which can be to him transmitted when an intense vertical effort directed downwards is exerted on the seat of the sofa.
  • the connecting rod works mainly in compression and can therefore withstand particularly intense efforts because the joint toggle is locked. Therefore, a charge vertical on the seat of the sofa is not likely to lead to an unexpected opening of the bed.
  • the armrest 9 pivots around the axis 46 and tends to press the seat 7 towards the ground S, this movement being obtained by the eccentricity of the movements of the axes 42 and 46.
  • the box 27 is provided with lights 59 and 60 in an arc of circle for the passage of these axes.
  • the invention has been described with a gas spring; she is however applicable with other means of control, and especially with all types of cylinders.

Abstract

Opening mechanism for sofa (6)-bed (10) comprises plate (20) rotating around fixed axis and support bed base (4), and gas spring (30) controlling rotating of plate around its fixed axis. Mechanism also comprises lever (22) attached on first end of connecting rod (24) having second end rotating around another fixed axis. An Independent claim is also included for the sofa-bed.

Description

L'invention a trait à un mécanisme de basculement et à un ensemble formant canapé et lit équipé d'un tel mécanisme.The invention relates to a tilting mechanism and a sofa and bed assembly equipped with such a mechanism.

Il est connu, notamment de EP-A-0 616 783, de transformer un canapé en lit et réciproquement grâce à un dispositif permettant une rotation simultanée du canapé et du lit autour d'un axe fixe sensiblement horizontal. Ce dispositif comprend des vérins articulés sur des montants d'un bâti et sur une équerre pivotante solidaire du sommier du lit. Ces vérins ont pour fonction de contrôler les mouvements de basculement du sommier du lit en exerçant sur les équerres un effort d'assistance au mouvement, notamment pour le mouvement d'escamotage du lit. Un tel dispositif ne permet pas une manoeuvre aisée pour l'utilisateur. En effet, si l'effort généré par les vérins en configuration d'utilisation du lit permet une remontée aisée du lit pour sa fermeture, l'effort à exercer pour l'ouverture du lit à partir de la configuration d'utilisation du canapé est très important, ce qui est une gêne pour l'utilisateur. A l'inverse, si cet effort est trop faible, il ne suffit pas pour assister efficacement à la remontée du lit.It is known, in particular from EP-A-0 616 783, to transform a sofa bed and vice versa thanks to a device allowing simultaneous rotation of the sofa and the bed around a substantially horizontal fixed axis. This device includes cylinders articulated on uprights of a frame and on a swivel bracket fixed to the bed base. These cylinders have function of controlling the tilting movements of the bed base by exerting an assistance effort on the brackets movement, especially for the retraction movement of the bed. Such a device does not allow easy operation for the user. Indeed, if the force generated by the cylinders in configuration of use of the bed allows easy raising of the bed for its closure, the effort to be exerted for the opening of the bed from the sofa use configuration is very important, which is a nuisance for the user. AT conversely, if this effort is too low, it is not enough to assist effectively in raising the bed.

De plus, le moment apparent du sommier par rapport à son axe de pivotement est égal au moment résultant du poids du sommier auquel s'ajoute le moment résultant du poids du canapé qui est éminemment variable, notamment saccadé, en fonction du degré d'inclinaison du sommier et du canapé. Les vérins du système connu ne permettent pas d'assister ou de compenser efficacement ce moment variable.In addition, the apparent moment of the box spring with respect to its pivot axis is equal to the moment resulting from the weight of the bed base to which is added the moment resulting from the weight of the sofa which is eminently variable, notably jerky, depending on the degree of inclination of the bed base and the sofa. The cylinders of known system does not allow to assist or compensate effectively this variable moment.

De plus, la liaison mécanique entre le canapé et le lit est telle qu'un effort vertical vers le bas exercé sur le canapé en configuration d'utilisation tend à faire basculer le sommier vers le configuration d'utilisation du lit, d'où un risque d'ouverture inopinée du lit.In addition, the mechanical connection between the sofa and the bed is such that a vertical downward force exerted on the sofa in configuration of use tends to tilt the bed base to the configuration of use of the bed, hence a risk of unexpected bed opening.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un mécanisme de basculement procurant un confort d'utilisation amélioré par rapport aux dispositifs connus grâce à une meilleure assistance du mouvement de basculement.It is to these disadvantages that we hear more particularly remedy the invention by proposing a tilting mechanism providing improved user comfort compared to known devices thanks to better movement assistance tipping.

L'invention propose également un mécanisme interdisant l'ouverture inopinée du lit lors de l'utilisation du canapé. The invention also provides a mechanism prohibiting unexpected opening of the bed when using the sofa.

Dans cet esprit, l'invention concerne un mécanisme de basculement d'un ensemble formant canapé et lit entre une première configuration où le canapé est utilisable alors que le lit est escamoté, et une seconde position où le lit est utilisable alors que le canapé est escamoté, ce mécanisme comprenant au moins une platine, articulée autour d'un axe fixe et supportant un sommier du lit, et des moyens de contrôle du pivotement de cette platine autour de cet axe. Ce mécanisme comprend, en outre, un levier articulé à la fois sur cette platine et sur un moyen de contrôle, ce levier étant également articulé sur une première extrémité d'une bielle dont la seconde extrémité est articulée autour d'un axe fixe par rapport au bâti.In this spirit, the invention relates to a mechanism for tilting of a sofa and bed assembly between a first configuration where the sofa is usable while the bed is folded away, and a second position where the bed is can be used while the sofa is retracted, this mechanism comprising at least one plate, articulated around a fixed axis and supporting a bed base, and means for controlling the pivoting of this plate around this axis. This mechanism further includes a lever hinged on both this plate and on a control means, this lever also being articulated on a first end of a connecting rod whose second end is articulated around a fixed axis by relationship to the built.

L'interposition du levier articulé entre la platine et le moyen de contrôle permet de transformer la résultante de l'effort généré par ce moyen de contrôle sur la platine en un moment adapté en permanence aux moments dus aux poids apparents du sommier du lit et du canapé, ce qui permet d'assister efficacement le mouvement de basculement quelle que soit la position d'ouverture du lit.The interposition of the articulated lever between the plate and the control means transforms the result of the effort generated by this control means on the plate in one moment permanently adapted to the moments due to the apparent weights of the bed base and the sofa, which allows you to assist effectively the tilting movement whatever the open position of the bed.

Selon des aspects avantageux mais non obligatoires de l'invention, le mécanisme incorpore une ou plusieurs des caractéristiques mentionnées dans les revendications dépendantes 2 à 9.According to advantageous but not compulsory aspects of the invention, the mechanism incorporates one or more of features mentioned in the dependent claims 2 to 9.

L'invention concerne également un ensemble formant canapé et lit, susceptible de basculer entre une première configuration, où le canapé est utilisable alors que le lit est escamoté, et une seconde configuration, où le lit est utilisable alors que le canapé est escamoté, caractérisé en ce qu'il comprend un mécanisme de basculement tel que précédemment décrit. Un tel ensemble est aisé à utiliser et son fonctionnement est particulièrement fiable.The invention also relates to a sofa assembly and reads, capable of switching between a first configuration, where the sofa can be used while the bed is folded away, and a second configuration, where the bed is usable while the sofa is folded away, characterized in that it includes a tilting mechanism as above described. Such an assembly is easy to use and its operation is particularly reliable.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaítront plus clairement à la lumière de la description qui va suivre d'un mode de réalisation d'un ensemble formant canapé et lit, équipé d'un mécanisme conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective d'un ensemble formant canapé et lit conforme à l'invention en configuration d'utilisation du canapé ;
  • la figure 2 est une vue en perspective analogue à la figure 1 alors que l'ensemble est en configuration d'utilisation du lit ;
  • la figure 3 est une coupe selon la ligne III-III à la figure 1 ;
  • la figure 3A est une vue à plus grande échelle du détail A à la figure 3 ;
  • la figure 4 est une représentation en perspective de certains éléments constitutifs du mécanisme, dans la configuration de la figure 3 ;
  • la figure 5 est une coupe analogue à la figure 3 dans une première position intermédiaire de basculement de l'ensemble ;
  • la figure 6 est une coupe analogue à la figure 3 dans une seconde position intermédiaire de basculement de l'ensemble ;
  • la figure 7 est une coupe analogue à la figure 3 lorsque l'ensemble est dans la configuration de la figure 2 et
  • la figure 7A est une vue à plus grande échelle du détail A à la figure 7.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of an embodiment of a sofa and bed assembly, equipped with a mechanism in accordance with its principle, given only by way of example and made with reference to the appended drawings in which:
  • Figure 1 is a perspective view of a sofa and bed assembly according to the invention in the configuration of use of the sofa;
  • Figure 2 is a perspective view similar to Figure 1 while the assembly is in the configuration of use of the bed;
  • Figure 3 is a section along line III-III in Figure 1;
  • FIG. 3A is an enlarged view of detail A in FIG. 3;
  • Figure 4 is a perspective representation of certain components of the mechanism, in the configuration of Figure 3;
  • Figure 5 is a section similar to Figure 3 in a first intermediate tilting position of the assembly;
  • Figure 6 is a section similar to Figure 3 in a second intermediate tilting position of the assembly;
  • FIG. 7 is a section similar to FIG. 3 when the assembly is in the configuration of FIG. 2 and
  • FIG. 7A is an enlarged view of detail A in FIG. 7.

L'ensemble formant canapé et lit conforme à l'invention comprend un bâti fixe 1 formé de deux montants verticaux 2 et 2' reliés par une traverse supérieure 3. Un sommier de lit 4 est articulé autour d'un axe X1 et fixe par rapport aux montants 2 et 2'. Sur sa face externe 4a visible à la figure 1, le sommier 4 porte un dossier 5 d'un canapé 6 comprenant également une assise 7 en appui sur le sol S grâce à deux pieds 8. Le canapé 6 est équipé de deux accoudoirs 9.The sofa and bed assembly according to the invention comprises a fixed frame 1 formed by two vertical uprights 2 and 2 'connected by an upper cross member 3. A bed base 4 is articulated around an axis X 1 and fixed by compared to amounts 2 and 2 '. On its external face 4 a visible in FIG. 1, the bed base 4 carries a backrest 5 of a sofa 6 also comprising a seat 7 resting on the floor S by means of two feet 8. The sofa 6 is equipped with two armrests 9 .

Un matelas de lit 10 est disposé contre la face interne 4b du sommier 4 et est utilisable dans la configuration des figures 2 et 7, alors que le canapé 6 est utilisable dans la configuration des figures 1, 3 et 4.A bed mattress 10 is disposed against the internal face 4b of box spring 4 and can be used in the configuration of Figures 2 and 7, while the sofa 6 can be used in the configuration of Figures 1, 3 and 4.

Dans la configuration des figures 2 et 7 le sommier 4 est supporté par une structure 11 formant pied, articulée sur la face externe 4a du sommier 4. In the configuration of FIGS. 2 and 7 the bed base 4 is supported by a structure 11 forming a foot, articulated on the external face 4 a of the bed base 4.

Le mécanisme permettant de passer de l'une à l'autre de ces configurations apparaít plus clairement aux figures 3 à 7. Des platines sont solidaires du sommier 4 à proximité des montants 2 et 2' et au niveau de l'axe X1. La platine 20 proche du montant 2 est seule représentée sur les figures, étant entendu qu'une seconde platine est prévue du côté du montant 2'. La platine 20 est articulée autour de l'axe X1 grâce à un arbre 21 destiné à être reçu dans un palier correspondant fixe par rapport au montant 2. La platine 20 permet donc le basculement entre les deux configurations précitées.The mechanism for switching from one to the other of these configurations appears more clearly in Figures 3 to 7. Plates are secured to the base 4 near the uprights 2 and 2 'and at the axis X 1 . The plate 20 close to the upright 2 is the only one shown in the figures, it being understood that a second plate is provided on the side of the upright 2 '. The plate 20 is articulated around the axis X 1 by means of a shaft 21 intended to be received in a corresponding bearing which is fixed relative to the upright 2. The plate 20 therefore allows tilting between the two aforementioned configurations.

Conformément à l'invention, un levier 22, de forme globalement triangulaire, est articulé au moyen d'un premier axe 23 sur la platine 20. Ce levier 22 est également articulé sur une première extrémité 24a d'une bielle 24 grâce à un second axe 25. La seconde extrémité 24b de la bielle 24 est articulée sur un axe fixe 26.According to the invention, a lever 22, of generally triangular shape, is articulated by means of a first axis 23 on the plate 20. This lever 22 is also articulated on a first end 24 a of a connecting rod 24 thanks to a second axis 25. The second end 24 b of the connecting rod 24 is articulated on a fixed axis 26.

En pratique, un caisson 27 est fixé contre la face interne du montant 2, ce caisson s'étendant entre ce montant et la platine 20. Un caisson analogue 27' visible à la figure 1, est fixe contre la face interne du montant 2' pour protéger un second mécanisme équivalent à celui représenté sur les figures 3 à 7. Le caisson 27 est pourvu d'un palier 27a de support de l'axe 26. Ces caissons permettent d'isoler l'essentiel du mécanisme et diminuent les risques de coincement du fait d'objets interférant avec les leviers, bielles et tiges, de même que les dangers de pincement de la main d'un utilisateur, notamment d'un enfant. Ces caissons permettent également de protéger le mécanisme contre la bourre ou la poussière environnante.In practice, a box 27 is fixed against the internal face of the upright 2, this box extending between this amount and the plate 20. A similar box 27 'visible in FIG. 1, is fixed against the internal face of the upright 2' to protect a second mechanism equivalent to that shown in FIGS. 3 to 7. The box 27 is provided with a bearing 27 a for supporting the axis 26. These boxes make it possible to isolate the main part of the mechanism and reduce the risks jamming due to objects interfering with the levers, connecting rods and rods, as well as the danger of pinching the hand of a user, especially a child. These boxes also protect the mechanism against fluff or surrounding dust.

Par ailleurs, le levier 22 est articulé grâce à un troisième axe 28 sur une extrémité 29a d'une tige 29 d'un ressort à gaz 30 dont le corps 31 est articulé autour d'un axe fixe 32 supporté par le caisson 27 au niveau d'un second palier non représenté.Furthermore, the lever 22 is articulated by a third axis 28 on one end 29 a of a rod 29 of a gas spring 30 whose body 31 is articulated around a fixed axis 32 supported by the box 27 at level of a second level not shown.

La fonction du vérin à gaz 30 est de contrôler le basculement de la platine 20, c'est-à-dire du sommier 4, entre les deux configurations des figures 1 et 2 en compensant les moments dus aux poids apparents de ce sommier et de ce canapé par rapport à l'axe X1.The function of the gas spring 30 is to control the tilting of the plate 20, that is to say of the bed base 4, between the two configurations of FIGS. 1 and 2 by compensating for the moments due to the apparent weights of this bed base and of this sofa with respect to the axis X 1 .

On note F1 la force exercée par le vérin 30 sur le levier 22. On note F2 la force exercée par la bielle 24 sur le levier 22 et l'on note F3 la résultante des forces F1 et F2 qui est égale à la force exercée par le levier 22 sur la platine 20 au niveau de l'axe 23.We denote by F 1 the force exerted by the jack 30 on the lever 22. We denote by F 2 the force exerted by the connecting rod 24 on the lever 22 and we denote by F 3 the result of the forces F 1 and F 2 which is equal to the force exerted by the lever 22 on the plate 20 at the axis 23.

La force F1 est en permanence dirigée de la tige 29 vers le levier 22. Le sens de la force F2 dépend de la position de la platine 20. Par exemple, la bielle 24 travaille en extension dans la configuration de la figure 3A alors qu'elle travaille en compression dans la configuration de la figure 7A, la force F2 variant entre ces configurations. La résultante F3 a donc une valeur variable, adaptée aux moments exercés sur la platine 20 par les poids apparents du sommier 4 et du canapé 6, en fonction de la position angulaire de ce sommier autour de l'axe X1. En d'autres termes, l'utilisation du levier 22 permet de combiner les forces F1 et F2 générées par le ressort à gaz 30 et par la bielle 24, afin de créer en permanence une résultante F3 sur la platine 20 adaptée à ces moments.The force F 1 is permanently directed from the rod 29 towards the lever 22. The direction of the force F 2 depends on the position of the plate 20. For example, the connecting rod 24 works in extension in the configuration of FIG. 3A then that it works in compression in the configuration of FIG. 7A, the force F 2 varying between these configurations. The resultant F 3 therefore has a variable value, adapted to the moments exerted on the plate 20 by the apparent weights of the bed base 4 and of the sofa 6, as a function of the angular position of this bed base around the axis X 1 . In other words, the use of lever 22 makes it possible to combine the forces F 1 and F 2 generated by the gas spring 30 and by the connecting rod 24, in order to permanently create a resultant F 3 on the plate 20 adapted to these moments.

Le choix de la géométrie du levier 22 et du positionnement des axes 23, 25, 26, 28 et 32 permet d'adapter la résultante F3 en fonction des poids apparents du sommier 4 et du canapé 6 sur la course du sommier 4.The choice of the geometry of the lever 22 and the positioning of the axes 23, 25, 26, 28 and 32 makes it possible to adapt the resultant F 3 as a function of the apparent weights of the bed base 4 and of the sofa 6 on the stroke of the bed base 4.

Un bras de renvoi coudé 40 est articulé au niveau d'une première extrémité 40a autour d'un arbre 41 fixe par rapport au bâti 1 et supporté par un palier du caisson 27. Au niveau de sa seconde extrémité 40b, le bras 40 est articulé grâce à un axe 42 sur une armature 43 du pied 8. Cette armature est, par ailleurs, articulée grâce à un axe 44 sur l'assise 7 du canapé.A bell crank arm 40 is articulated at a first end 40 about a shaft 41 fixed relative to the frame 1 and supported by a housing of the bearing 27. At its second end 40b, the arm 40 is articulated by an axis 42 on a frame 43 of the foot 8. This frame is, moreover, articulated by a pin 44 on the seat 7 of the sofa.

L'accoudoir 9 est articulé autour d'un axe 46 au niveau de l'extrémité 40b du bras de renvoi 40, les axes 42 et 46 étant parallèles et distincts. L'accoudoir 9 est, par ailleurs, articulé à l'assise 7 grâce à un axe 47. Ceci permet de créer une articulation à excentrique au niveau de la zone de jonction entre le bras de renvoi, le pied et l'accoudoir du canapé, de telle sorte que le mouvement de l'accoudoir peut être différencié du mouvement du pied entre les deux configurations de l'ensemble. L'accoudoir 9 travaille en extension pour supporter la partie avant de l'assise 7.The armrest 9 is hinged around an axis 46 at the end 40 b of the reference arm 40, the axes 42 and 46 being parallel and separate. The armrest 9 is, moreover, articulated to the seat 7 by means of an axis 47. This makes it possible to create an eccentric articulation at the level of the junction zone between the deflection arm, the foot and the armrest of the sofa. , so that the movement of the armrest can be differentiated from the movement of the foot between the two configurations of the assembly. The armrest 9 works in extension to support the front part of the seat 7.

Un levier de renvoi 50 est articulé autour d'un axe 51 fixe par rapport au bâti 1 et supporté par un palier du caisson 27. Le levier 50 est articulé grâce à un axe 52 sur une première extrémité 53a d'un levier coudé 53 dont la seconde extrémité 53b est articulée autour d'un axe 54 fixé sur la platine 20. Ainsi, le mouvement de pivotement de la platine 20 autour de l'axe X1 induit un mouvement de pivotement du levier 53 autour de l'axe 54 et, par là même, un mouvement de pivotement du levier de renvoi 50 autour de l'axe 51. Le levier de renvoi 50 est également articulé grâce à un axe 55 sur une première extrémité 56a d'une bielle 56 dont la seconde extrémité 56b est articulée grâce à un axe 57 sur une chape 58 solidaire du bras de renvoi 40. Grâce à l'articulation du levier de renvoi 50 et de la bielle 56, le mouvement de pivotement du levier de renvoi 50 autour de l'axe fixe 51, qui est généré par le pivotement de la platine 20, est transmis au bras 40, ce qui permet de le faire passer de la configuration des figures 3 et 4 à celle de la figure 7 en passant par les positions des figures 5 et 6. Le bras de renvoi 40, le levier de renvoi 50 et le levier 22 permettent ainsi de transmettre au pied du canapé et aux éléments qu'il supporte des mouvements de basculement de la platine.A return lever 50 is articulated around an axis 51 fixed relative to the frame 1 and supported by a bearing of the box 27. The lever 50 is articulated by means of an axis 52 on a first end 53 a of an angled lever 53 whose second end 53 b is articulated around an axis 54 fixed on the plate 20. Thus, the pivoting movement of the plate 20 around the axis X 1 induces a pivoting movement of the lever 53 around the axis 54 and, thereby, a pivoting movement of the return lever 50 around the axis 51. The return lever 50 is also articulated by an axis 55 on a first end 56 has a connecting rod 56, the second of which end 56 b is articulated by an axis 57 on a yoke 58 secured to the deflection arm 40. Thanks to the articulation of the deflection lever 50 and of the connecting rod 56, the pivoting movement of the deflection lever 50 around the fixed axis 51, which is generated by the pivoting of the plate 20, is transmitted to the bra s 40, which makes it possible to pass it from the configuration of FIGS. 3 and 4 to that of FIG. 7 passing through the positions of FIGS. 5 and 6. The deflection arm 40, the deflection lever 50 and the lever 22 allow to transmit to the foot of the sofa and the elements it supports tilting movements of the plate.

Dans la configuration des figures 1, 3 et 4, si un effort intense F4 est exercé sur le bord avant 7a de l'assise 7, cet effort résulte dans un moment tendant à faire pivoter le bras coudé 40 dans le sens de la flèche F5 à la figure 3A, un tel pivotement étant empêché par le fait que la bielle 56 est alors comprimée entre les axes 55 et 57, puisque les axes 51, 55 et 57 sont alignés dans cette configuration.In the configuration of FIGS. 1, 3 and 4, if an intense force F 4 is exerted on the front edge 7 a of the seat 7, this force results in a moment tending to pivot the bent arm 40 in the direction of the arrow F 5 in FIG. 3A, such pivoting being prevented by the fact that the connecting rod 56 is then compressed between the axes 55 and 57, since the axes 51, 55 and 57 are aligned in this configuration.

En d'autres termes, la géométrie du bras coudé 40, du levier de renvoi 50 et de la bielle 56 est telle que ces éléments constituent une articulation à genouillière verrouillée dans la configuration des figures 1, 3 et 4 et susceptible de résister à des efforts importants qui peuvent lui être transmis lorsqu'un effort vertical intense dirigé vers le bas est exercé sur l'assise du canapé. En effet, dans ce cas, la bielle travaille essentiellement en compression et peut donc résister à des efforts particulièrement intenses car l'articulation à genouillère est verrouillée. Dès lors, une charge verticale sur l'assise du canapé ne risque pas de conduire à une ouverture inopinée du lit.In other words, the geometry of the bent arm 40, of the return lever 50 and connecting rod 56 is such that these elements constitute a locked toggle joint in the configuration of Figures 1, 3 and 4 and susceptible to resist the great efforts which can be to him transmitted when an intense vertical effort directed downwards is exerted on the seat of the sofa. Indeed, in this case, the connecting rod works mainly in compression and can therefore withstand particularly intense efforts because the joint toggle is locked. Therefore, a charge vertical on the seat of the sofa is not likely to lead to an unexpected opening of the bed.

Au contraire, lorsque un utilisateur exerce sur le sommier 4 un effort de basculement, tel que représenté par la flèche F6, cet effort est transmis par la rotation de la platine 20 au levier 53 qui fait pivoter le levier de renvoi 50 dans le sens de la flèche F7 à la figure 3A et permet de désaligner les axes 51, 55 et 57 et d'entraíner ainsi le bras coudé 40 en direction du sol S en faisant pivoter l'armature 43 et le bras 8 en direction du sol, alors qu'un glissement de l'extrémité inférieure 8a du pied 8 a lieu, comme représenté par la flèche F8.On the contrary, when a user exerts on the bed base 4 a tilting force, as represented by the arrow F 6 , this force is transmitted by the rotation of the plate 20 to the lever 53 which rotates the return lever 50 in the direction the arrow F 7 in FIG. 3A and makes it possible to misalign the axes 51, 55 and 57 and thus to drive the bent arm 40 in the direction of the ground S by pivoting the armature 43 and the arm 8 in the direction of the ground, while a sliding of the lower end 8 a of the foot 8 takes place, as represented by the arrow F 8 .

Lors de ce mouvement, l'accoudoir 9 pivote autour de l'axe 46 et tend à plaquer l'assise 7 vers le sol S, ce mouvement étant obtenu par l'excentration des mouvements des axes 42 et 46.During this movement, the armrest 9 pivots around the axis 46 and tends to press the seat 7 towards the ground S, this movement being obtained by the eccentricity of the movements of the axes 42 and 46.

Le mouvement de remontée du sommier qui permet d'escamoter le matelas 10 a lieu en passant successivement par les configurations des figures 7, 6, 5 et 3, la résultante F3 fournissant à l'utilisateur une assistance adéquate et ce, dans toutes les positions angulaires du sommier 4 autour de l'axe X1.The upward movement of the bed base which allows the mattress 10 to be retracted takes place passing successively through the configurations of FIGS. 7, 6, 5 and 3, the resulting F 3 providing the user with adequate assistance in all cases. angular positions of the bed base 4 around the axis X 1 .

Comme la platine 20 est située à l'extérieur du caisson 27 et reliée à certains éléments qu'il contient par les axes 26 et 54, le caisson 27 est pourvu de lumières 59 et 60 en arc de cercle pour le passage de ces axes.As the plate 20 is located outside the box 27 and connected to certain elements it contains by axes 26 and 54, the box 27 is provided with lights 59 and 60 in an arc of circle for the passage of these axes.

L'invention a été décrite avec un ressort à gaz ; elle est cependant applicable avec d'autres moyens de contrôle, et notamment avec tous types de vérins.The invention has been described with a gas spring; she is however applicable with other means of control, and especially with all types of cylinders.

Claims (10)

Mécanisme de basculement d'un ensemble formant canapé (6) et lit (10) entre une première configuration, où ledit canapé est utilisable alors que ledit lit est escamoté, et une seconde position, où ledit lit est utilisable alors que le canapé est escamoté, ledit mécanisme comprenant : au moins une platine (20) articulée autour d'un axe fixe (X1) et supportant un sommier (4) dudit lit et des moyens de contrôle (30) du pivotement de ladite platine autour de son axe d'articulation (X1), caractérisé en ce qu'il comprend, un levier (22) articulé (en 23) sur ladite platine et (en 28) sur un moyen de contrôle (30), ledit levier étant également articulé (en 25) sur une première extrémité (24a) d'une bielle (24) dont la seconde extrémité (24b) est articulée autour d'un axe fixe (26).Mechanism for tilting an assembly forming a sofa (6) and bed (10) between a first configuration, where said sofa is usable while said bed is retracted, and a second position, where said bed is usable while the sofa is retracted , said mechanism comprising: at least one plate (20) articulated around a fixed axis (X 1 ) and supporting a bed base (4) of said bed and control means (30) of the pivoting of said plate around its articulation axis (X 1 ), characterized in that it comprises, a lever (22) articulated (at 23) on said plate and (at 28) on a control means (30), said lever also being articulated (at 25) on a first end (24 a ) a connecting rod (24) whose second end (24 b ) is articulated around a fixed axis (26). Mécanisme selon la revendication 1, caractérisé en ce que ledit moyen de contrôle est un ressort à gaz (30) ou un vérin, pneumatique, hydraulique, électrique ou à ressort, dont la tige (29) ou le corps est articulé (en 28) sur ledit levier (22) et dont le corps (31) ou la tige est articulé (en 32) sur une partie fixe (1, 27).Mechanism according to claim 1, characterized in that that said control means is a gas spring (30) or a cylinder, pneumatic, hydraulic, electric or spring, of which the rod (29) or the body is articulated (at 28) on said lever (22) and whose body (31) or rod is articulated (at 32) on a fixed part (1, 27). Mécanisme selon l'une des revendications 1 ou 2, caractérisé en ce qu'il comprend un bras de renvoi (40) articulé, au niveau d'une première extrémité (40a), autour d'un axe fixe (41), et (en 42), au niveau d'une seconde extrémité (40b), à une structure (43) formant pied (8) dudit canapé (6).Mechanism according to one of claims 1 or 2, characterized in that it comprises a deflection arm (40) articulated, at a first end (40 a ), around a fixed axis (41), and (at 42), at a second end (40 b ), to a structure (43) forming a foot (8) of said sofa (6). Mécanisme selon la revendication 3, caractérisé en ce que ledit bras de renvoi (40) est articulé (en 46), au niveau de sa seconde extrémité (40b), à une première partie d'un accoudoir (9) dont une seconde partie est articulée (en 47) sur une assise (7) dudit canapé (6), les axes d'articulation (42, 46) dudit bras de renvoi sur ledit pied et ledit accoudoir étant parallèles et distincts.Mechanism according to claim 3, characterized in that said deflection arm (40) is articulated (at 46), at its second end (40 b ), to a first part of an armrest (9) including a second part is articulated (at 47) on a seat (7) of said sofa (6), the articulation axes (42, 46) of said return arm on said foot and said armrest being parallel and distinct. Mécanisme selon la revendication 4, caractérisé en ce que ledit pied (8) est articulé (en 44) sur ladite assise (7) et apte à être déplacé en direction du sol lors du passage de ladite première configuration à ladite seconde configuration, le mouvement dudit pied entraínant un mouvement de pivotement dudit accoudoir (9) autour de son axe (46) d'articulation sur ledit bras de renvoi (40).Mechanism according to claim 4, characterized in that that said foot (8) is articulated (at 44) on said seat (7) and able to be moved towards the ground when passing from said first configuration to said second configuration, the movement of said foot causing a pivoting movement of said armrest (9) about its axis (46) of articulation on said deflection arm (40). Mécanisme selon l'une des revendications 3 à 5, caractérisé en ce qu'il comprend un levier de renvoi (50) articulé autour d'un axe fixe (51), relié par une première articulation pivotante (en 52) à une première extrémité (53a) d'un levier (53) dont une seconde extrémité (53b) est articulée sur un axe (54) solidaire de ladite platine (20), et relié par une seconde articulation pivotante (55) à une première extrémité (56a) d'une bielle (56) dont la seconde extrémité (56b) est articulée sur un axe (57) solidaire dudit bras de renvoi (40).Mechanism according to one of claims 3 to 5, characterized in that it comprises a return lever (50) articulated around a fixed axis (51), connected by a first pivoting articulation (at 52) to a first end (53 a ) of a lever (53), a second end (53 b ) of which is articulated on an axis (54) integral with said plate (20), and connected by a second pivoting articulation (55) to a first end ( 56 a ) of a connecting rod (56) whose second end (56 b ) is articulated on an axis (57) integral with said deflection arm (40). Mécanisme selon la revendication 6, caractérisé en ce que les axes d'articulation (51, 55, 57) dudit levier de renvoi (50) sur une partie fixe (1, 27), d'une part, et de ladite bielle (56), respectivement sur ledit levier de renvoi (50) et sur ledit bras de renvoi (40), d'autre part, sont globalement alignés dans ladite première configuration.Mechanism according to claim 6, characterized in that that the hinge pins (51, 55, 57) of said return lever (50) on a fixed part (1, 27), on the one hand, and said connecting rod (56), respectively on said return lever (50) and on said deflection arm (40), on the other hand, are generally aligned in said first configuration. Mécanisme selon l'une des revendications précédentes, caractérisé en ce qu'au moins un caisson (27, 27') est fixé sur ledit bâti (1) et prévu pour contenir certains leviers, bielles et tiges (22, 24, 31, 50, 53, 56) ainsi que lesdits moyens de contrôle (30), à proximité de ladite platine (20).Mechanism according to one of the preceding claims, characterized in that at least one box (27, 27 ') is fixed on said frame (1) and designed to contain certain levers, connecting rods and rods (22, 24, 31, 50, 53, 56) as well as said means for control (30), near said plate (20). Mécanisme selon la revendication 8, caractérisé en ce que ledit caisson (27, 27') comprend au moins une lumière (59, 60) sensiblement en arc de cercle de passage d'un axe (23, 54) d'articulation d'un levier (22, 53) sur ladite platine (20).Mechanism according to claim 8, characterized in that that said box (27, 27 ') comprises at least one light (59, 60) substantially in the arc of a passage for an axis (23, 54) of articulation of a lever (22, 53) on said plate (20). Ensemble formant canapé (6) et lit (10) et susceptible de basculer entre une première configuration où ledit canapé est utilisable alors que ledit lit est escamoté, et une seconde configuration où ledit lit est utilisable alors que ledit canapé est escamoté, caractérisé en ce qu'il comprend un mécanisme de basculement (20-60) selon l'une des revendications précédentes.Set forming sofa (6) and bed (10) and susceptible to switch between a first configuration where said sofa is usable while said bed is retracted, and a second configuration where said bed is usable while said sofa is retracted, characterized in that it includes a tilting mechanism (20-60) according to one of claims previous.
EP00420095A 1999-05-19 2000-05-17 Tipping mechanism and assembly of sofa-bed and bed equipped therewith Withdrawn EP1053703A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9906541 1999-05-19
FR9906541A FR2793665B1 (en) 1999-05-19 1999-05-19 TILTING MECHANISM AND SOFA AND BED ASSEMBLY PROVIDED WITH SUCH A MECHANISM

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EP00420096A Withdrawn EP1053704A1 (en) 1999-05-19 2000-05-17 Tilt mechanism and covertible sofa-bed structure with such a mechanism
EP00420095A Withdrawn EP1053703A1 (en) 1999-05-19 2000-05-17 Tipping mechanism and assembly of sofa-bed and bed equipped therewith

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EP00420096A Withdrawn EP1053704A1 (en) 1999-05-19 2000-05-17 Tilt mechanism and covertible sofa-bed structure with such a mechanism

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2890547A1 (en) * 2005-09-12 2007-03-16 Guy Covarel Tilting mechanism for combined sofa and bed has bar with one end that pivots and slide on main lever and other connected to sofa control arm
RU198778U1 (en) * 2020-05-15 2020-07-28 Общество С Ограниченной Ответственностью "Август Диэсджи" LIFTING BED WITH SOFA

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20065482L (en) * 2006-07-06 2008-04-03 Sba Interior Oy Sofa bed
AT508352B1 (en) * 2010-03-04 2011-01-15 Hoppe Kg Hodry Metallfab CLOSET BED
ITTV20130069A1 (en) * 2013-05-07 2014-11-08 Pessottoreti S A S MOBILE WITH BUILT-IN BED

Citations (4)

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Publication number Priority date Publication date Assignee Title
GB954161A (en) * 1962-03-27 1964-04-02 Arnold Frohwein Linkage for a convertible settee
US5136737A (en) * 1990-10-05 1992-08-11 George S. Reppas Self standing convertible furniture frame assembly
EP0616783A1 (en) 1993-03-26 1994-09-28 Guy Covarel Device for changing a couch into a bed
US5652978A (en) * 1995-09-14 1997-08-05 Wiig; Selmer Counterbalanced moving pivot folding bed

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB954161A (en) * 1962-03-27 1964-04-02 Arnold Frohwein Linkage for a convertible settee
US5136737A (en) * 1990-10-05 1992-08-11 George S. Reppas Self standing convertible furniture frame assembly
EP0616783A1 (en) 1993-03-26 1994-09-28 Guy Covarel Device for changing a couch into a bed
US5652978A (en) * 1995-09-14 1997-08-05 Wiig; Selmer Counterbalanced moving pivot folding bed

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2890547A1 (en) * 2005-09-12 2007-03-16 Guy Covarel Tilting mechanism for combined sofa and bed has bar with one end that pivots and slide on main lever and other connected to sofa control arm
RU198778U1 (en) * 2020-05-15 2020-07-28 Общество С Ограниченной Ответственностью "Август Диэсджи" LIFTING BED WITH SOFA

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FR2793665A1 (en) 2000-11-24
FR2793665B1 (en) 2001-08-03
EP1053704A1 (en) 2000-11-22

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