EP3880924B1 - Piece of furniture with an arrangement for guiding at least one folding/sliding door - Google Patents

Description

The invention relates to a piece of furniture with an arrangement for guiding at least one folding-sliding door, which has at least two door leaves that are articulated to one another, in particular via at least one door hinge, and which are aligned between a parallel position in which the at least two door leaves are essentially parallel to one another , and a coplanar position in which the at least two door leaves are aligned essentially coplanar and are movable, the arrangement having at least one guide rail to be attached to a fixed furniture part and at least one movably mounted on the at least one guide rail and with the at least one fold -Sliding door connectable guide device, and wherein the arrangement has at least one vertical support on which the at least one folding-sliding door can be pivoted, preferably at least one support hinge is provided for this purpose.

The Figures 1a) to 1d ) show a piece of furniture 29 with two folding-sliding doors 2, each of which has two door leaves 4, 5 which are articulated to one another via door hinges 3 and which lie between a parallel position in which the at least two door leaves 4, 5 are essentially aligned parallel to one another (cf . the partial figure 1c)), and a coplanar position in which the two door leaves 4, 5 are aligned essentially coplanar (cf. the partial figure 1a)), are movable.

The furniture 29 further comprises a fixed furniture part 6 and an arrangement for guiding the folding-sliding doors 2 relative to the fixed furniture part 6, the arrangement having a guide rail 7 attached to the fixed furniture part 6 and one for each folding-sliding door 2 Guide rail 7 includes a movably mounted guide device 8 that can be connected to the respective folding-sliding door 2.

When the folding-sliding doors 2 are arranged in the coplanar and parallel positions, the folding-sliding doors 2 are located due to the rigidity of the fittings, via which the folding-sliding doors 2 are connected to the fixed furniture part 6, in a relatively stable state. The situation is different if the folding-sliding doors 2 are arranged in an intermediate position between these two maximum positions: In this case, a lowering 39 of the folding-sliding doors 2 can occur, which occurs in the area of the articulated connection of the door leaves 4 , 5 is the largest (see sub-figure 1b)).

This lowering can have negative effects in the prior art: The angle-dependent lowering can lead to signs of wear on the fitting parts via which the folding-sliding doors 2 are connected to the fixed furniture part 6, in particular on the guide rail 7 and on the Guide device 8.

Furthermore, the lowering can even lead to the folding-sliding doors 2 touching the ground in an intermediate position, which results in jamming of the folding-sliding doors 2 and/or wear of the folding-sliding doors 2 in the lower area may have.

One way to counteract this lowering is to make the guide rail 7 and the guide device 8 as stable as possible. However, this is only possible to a limited extent. In addition, this approach would result in a very high material requirement, particularly when designing the guide rail 7, which in turn is associated with high costs.

The object of the present invention is to avoid the disadvantages described and to provide a piece of furniture with an arrangement for guiding at least one folding-sliding door, in which the lowering of the at least one folding-sliding door during the movement between the coplanar position and the parallel position can be reduced as much as possible without requiring excessive material expenditure.

This task is solved by the features of the independent claim.

In the case of the furniture according to the invention, it is therefore provided that the at least one guide rail and / or the at least one guide device comprises at least one energy storage device, through which the at least one folding-sliding door can be acted upon in the state of use with a force opposite to the weight force.

This measure makes it possible to specifically counteract the lowering of the at least one folding-sliding door in an intermediate position between the coplanar position and the parallel position. As a result, the reduction can be limited to a tolerable amount at which the disadvantages described can be largely avoided.

According to an advantageous embodiment, it is advisable for the at least one energy storage device to be designed to provide a predetermined maximum force, preferably between 50 N and 150 N.

According to the invention, it is provided that the force that can be exerted by the at least one energy store on the at least one folding-sliding door against the weight depends on the size of the angle that the at least one folding-sliding door or the at least two door leaves enclose relative to the at least one guide rail , is dependent, preferably where the force is greatest in an angular range between 30° and 60°, preferably at an angle of approximately 45°.

An angle-dependent force is equivalent to a path-dependent force, which is exerted depending on the position of the at least one guide device relative to the at least one guide rail.

A technically simple and yet robust solution according to the invention provides that the at least one energy accumulator comprises one or more spring elements, preferably at least one of the spring elements provided is designed as a helical spring and/or compression spring.

In this context, it is advisable for the at least one energy accumulator to comprise a plurality of spring elements which are arranged at a distance from one another on the at least one guide rail, and/or wherein the at least one energy accumulator comprises at least one spring element which is arranged on the at least one guide device.

According to a preferred embodiment, it is provided that the at least one guide rail has at least one carrier and at least one raceway which is movably mounted relative thereto, preferably extending in a longitudinal direction of the at least one guide rail, the at least one energy accumulator having the at least one raceway relative to the at least one A force is applied to the carrier, preferably wherein the at least one raceway is arranged at a variable distance from the at least one carrier.

An alternative or additional embodiment consists in that the at least one guide device has at least one carriage, which can be supported on the at least one guide rail via at least one, preferably essentially cylindrical, rolling body, and at least one connecting device which is movably mounted relative to the at least one carriage for connecting the at least one folding-sliding door with the at least one guide device, wherein the at least one energy accumulator applies a force to the at least one connecting device relative to the at least one carriage, preferably wherein the at least one connecting device is arranged at a variable distance from the at least one carriage.

In order to be able to arrange the at least one folding-sliding door in the at least one fixed furniture part when the at least two door leaves are arranged essentially in the parallel position, it can advantageously be provided that the arrangement comprises at least one transverse rail, which is essentially transverse, preferably arranged substantially perpendicular to the at least one guide rail. The at least one cross rail can be designed in one piece with the at least one guide rail or as a separate rail.

A particularly favorable embodiment results when the at least one vertical support is designed to accommodate a greater load of the at least one folding-sliding door than the at least one guide rail and the at least one guide device movably mounted thereon. In this case, the at least one guide rail can be made very simple and compact. The at least one guide rail then primarily serves the purpose of guidance and only needs to support a defined residual load. A distribution of the loads of, for example, 90% (supported by the at least one vertical support) and 10% (supported by the at least one guide rail) has proven to be ideal.

It is also advisable for the furniture to comprise at least one, preferably shaft-shaped, side space for at least partially, preferably completely, accommodating the at least one folding-sliding door when the at least two door leaves are arranged essentially in the parallel position, and/or has at least one interior space for accommodating kitchen furniture, the at least one interior space consisting of the at least one folding-sliding door can be at least partially covered from the outside when the at least two door leaves are arranged essentially in the coplanar position.

Fig. 1a)-d)

ein Möbel mit zwei Falt-Schiebe-Türen in einer perspektivischen Ansicht, wobei in der Teilfigur a) die Türen in einer Komplanarstellung, in der Teilfigur b) eine der Türen in einer teilgeöffneten Zwischenstellung, in der Teilfigur c) die Türen in einer Parallelstellung außerhalb eines feststehenden Möbelteils und in der Teilfigur d) die Türen in der Parallelstellung in Seitenräumen des feststehenden Möbelteils angeordnet sind,

Fig. 2

ein Diagramm, in welchem die Absenkung einer Falt-Schiebe-Tür in Abhängigkeit vom Öffnungswinkel für ein Fallbeispiel dargestellt ist, und zwar ohne Kraftunterstützung (gestrichelte Linie) und mit Kraftunterstützung (durchgezogene Linie),

Fig. 3a), b)

ein Ausführungsbeispiel einer erfindungsgemäßen Anordnung in einer schematisch dargestellten perspektivischen Ansicht (Teilfigur a)) und Explosionsansicht (Teilfigur b)),

Fig. 4a)-c)

das Ausführungsbeispiel gemäß Fig. 3a), b) in einer schematisch dargestellten Seitenansicht, wobei ein lastübertragender Wälzkörper einer Führungsvorrichtung in unterschiedlichen Stellungen relativ zur Führungsschiene dargestellt ist,

Fig. 5a), b)

ein Ausführungsbeispiel einer Führungsvorrichtung, welche in der erfindungsgemäßen Anordnung eingesetzt werden kann, in einer schematisch dargestellten perspektivischen Ansicht (Teilfigur a)) und Explosionsansicht (Teilfigur b)), und

Fig. 6a), b)

das Ausführungsbeispiel gemäß Fig. 5a), b) in einer schematisch dargestellten Seitenansicht, wobei in der Teilfigur a) ein schwach und in der Teilfigur b) ein stark belasteter Zustand zu sehen ist.

Further details and advantages of the invention are explained in more detail below based on the description of the figures with reference to the drawings. Show in it:

Fig. 1a)-d)

a piece of furniture with two folding-sliding doors in a perspective view, whereby in partial figure a) the doors are in a coplanar position, in partial figure b) one of the doors is in a partially open intermediate position, in partial figure c) the doors are in a parallel position outside a fixed furniture part and in partial figure d) the doors are arranged in the parallel position in side spaces of the fixed furniture part,

Fig. 2

a diagram in which the lowering of a folding-sliding door is shown depending on the opening angle for a case study, namely without power support (dashed line) and with power support (solid line),

Fig. 3a), b)

an exemplary embodiment of an arrangement according to the invention in a schematically illustrated perspective view (partial figure a)) and exploded view (partial figure b)),

Fig. 4a)-c)

the exemplary embodiment according to Fig. 3a ), b) in a schematically illustrated side view, wherein a load-transmitting rolling element of a guide device is shown in different positions relative to the guide rail,

Fig. 5a), b)

an embodiment of a guide device which can be used in the arrangement according to the invention, in a schematically illustrated perspective view (partial figure a)) and exploded view (partial figure b)), and

Fig. 6a), b)

the exemplary embodiment according to Fig. 5a ), b) in a schematically illustrated side view, with partial figure a) showing a weakly loaded state and partial figure b) showing a heavily loaded state.

On the Figures 1a) to 1d ) was already partially referenced in the introduction to the description. In addition, the following can be done:
As can be seen from partial figure 1a), the two folding-sliding doors 2 are arranged essentially parallel to the guide rail 7 when the two door leaves 4, 5 are arranged in the coplanar position. The guide rail 7 can, for example, be attached to a top surface 37 of the fixed furniture part 6, as in the case specifically shown.

From partial figure 1c) it can be seen that the two folding-sliding doors 2 essentially enclose an angle 13 of approximately 90 ° to the at least one guide rail 7 when the two door leaves 4, 5 are arranged in the parallel position.

The guide rail 7 can be constructed from a single piece or from several sections arranged one behind the other in the longitudinal direction 17.

The furniture 29 can also have other configurations: For example, only one folding-sliding door 2 can be provided. It is also conceivable to combine this with a single-leaf door.

In the specifically illustrated embodiment, a tall cabinet 35 is arranged adjacent to the fixed furniture part 6.

Furthermore, one vertical support 27 is provided for each folding-sliding door 2, one of the two door leaves 4, 5 being connected to a guide device 8, 34 and another of the two door leaves 4, 5 being articulated to the vertical support 27 via support hinges 28. The vertical supports 27 are designed to accommodate a greater load of the respective folding-sliding door 2 than the guide rail 7 and the respective guide device 8, 34 movably mounted thereon.

The furniture 29 has a shaft-shaped side space 30 for each folding-sliding door 2 for at least some areas - or as in the specifically illustrated case (see partial figure 1d)) completely - receiving the folding-sliding door 2 when the two door leaves 4, 5 are arranged essentially in the parallel position. The side rooms 30 can be defined, for example, by side walls 38 of the fixed furniture part 6.

In addition, the furniture 29 has an interior 31 for accommodating kitchen furniture 32, 33, the interior 31 being able to be covered from the outside by the folding-sliding doors 2 when the two door leaves 4, 5 are arranged essentially in the coplanar position. The kitchen furniture can be drawers 32 or wall cabinets 33, for example.

In order to transport the folding-sliding doors 2 from the position shown in partial figure 1c) to the position shown in partial figure 1d) (and vice versa), cross rails 26 can be provided, which are essentially transverse, preferably essentially vertical. are arranged to the guide rail 7 (indicated by dashed lines in partial figure 1b). In other words, the cross rails 26 extend in a depth direction 36 of the furniture 29.

It is advisable that the door leaf 5 with the guide device 8 is arranged in the parallel position on the vertical support 27 or a storage device connected to it and then the folded folding-sliding door 2 is placed over the vertical support 27, which is slidably mounted on the cross rails 26 provided is, is moved into a side room 30.

Like in the Figure 1b ) shown and described in the introduction to the description, a lowering 39 of the folding-sliding doors 2 can occur in an intermediate position.

In the Figure 2 This lowering 39 is shown as a function of the opening angle 13 for a specific case example in which the folding-sliding door has a weight of approximately 70 kg.

Without any countermeasures, a reduction 39 of approx. 10 mm can occur (compare the dashed line). This can already lead to the problems described.

It should be noted that the angle 0° corresponds to the coplanar position and the angle 90° corresponds to the parallel position. The fact that the depression 39 remains essentially at the same low level in an angular range of 30° to 60° is due to the fact that the guide jams due to the high depression and the resulting transverse forces.

According to the invention, it is now provided that the at least one guide rail 7 and / or the at least one guide device 8, 34 comprises at least one energy storage 9, 10, through which the at least one folding-sliding door 2 in the state of use with a force opposite to the weight force 11 12 can be acted upon.

In the diagram of the Figure 2 In the case example shown, another curve (solid line) is shown, in which the at least one energy storage device provides a maximum force of 100 N. A direct comparison with the situation without countermeasures shows that a significant reduction in subsidence 39 can be achieved. The force 12 that can be exerted by the at least one energy accumulator 9, 10 on the at least one folding-sliding door 2 against the weight force 11 is of the size of the angle 13 that the at least one folding-sliding door 2 or the at least two door leaves 4 , 5 relative to the at least one guide rail 7, depending, the force 12 being greatest in an angular range between 30° and 60°, preferably at an angle 13 of approximately 45°.

Technically, this can be done, for example, as in Figures 3a ), b) and 4a) to 4c) shown:
Shown is an arrangement 1 for guiding at least one folding-sliding door 2, which has at least two door leaves 4, 5 that are articulated to one another, in particular via at least one door hinge 3, and which are between a parallel position in which the at least two door leaves 4, 5 in are aligned essentially parallel to one another, and are movable in a coplanar position in which the at least two door leaves 4, 5 are aligned essentially coplanar, the arrangement 1 having at least one guide rail 7 to be attached to a fixed furniture part 6 and one on the guide rail 7 movably mounted and with the at least one folding-sliding door 2 connectable guide device 8 includes. The Guide rail 7 can be attached to a fixed furniture part 6 via a support surface 42.

The guide device 8 comprises an energy storage 9, through which the at least one folding-sliding door 2 can be acted upon in the state of use with a force 12 that is opposite to the weight force 11.

The energy storage 9 is designed to provide a predetermined maximum force, preferably between 50 N and 150 N.

Furthermore, the energy accumulator 9 comprises a plurality of spring elements 14, which are designed as coil springs and compression springs. The spring elements 14 are arranged at a distance from one another on the guide rail 7.

The guide rail 7 has a carrier 16 and a raceway 18 which is movably mounted relative thereto and runs in a longitudinal direction 17 of the guide rail 7, the energy accumulator 9 applying a force 12 to the raceway 18 relative to the carrier 16. To hold the spring elements 14, corresponding receptacles 43 can be arranged in the carrier 16 and/or in the raceway 18.

The track 18 is arranged at a variable distance 19 from the carrier 16.

The guide device 8 comprises a load-transmitting rolling element 41, which rolls on the raceway 18.

In addition, the guide device 8 includes a plurality of rolling elements 40 for lateral support of the guide device 8 on the guide rail 7.

How now? Figures 4a) to 4c ) can be seen, depending on the position of the rolling element 41 or the guide device 8 relative to the guide rail 7, the energy storage device 9 exerts a force 12 that is opposite to the weight force 11 on the guide device 8 and on the folding-sliding door 2 connected or connectable to it. The force 12 is position-dependent: In the edge areas of the guide rail 7 (compare the partial figures 4a) and 4c)), the force 12 is less than in the intermediate area (compare partial figure 4b)), since here a larger number of spring elements 14 are involved in the application of force.

In summary, the guide rail 7 is designed in several parts, with a raceway 18 being biased by springs 14 with a defined force 12. When driving over the track 18, the track 18 lowers.

The Figures 5a), 5b ), 6a) and 6b ) show a further technical implementation of the invention which is an alternative or addition to that in the Figures 3a ), b) and 4a) to 4c) illustrated embodiment can be used:
In this case, the guide device 34 comprises carriages 20, which can be supported on the guide rail 7 via essentially cylindrical rolling elements 21, 22, 23, and a connecting device 24 which is movably mounted relative to the carriage 20 for connecting the folding-sliding door 2 to the guide device 34, wherein the energy storage 10 applies a force 12 to the connecting device 24 relative to the carriage 20. The connecting device 24 is arranged at a variable distance 25 from the carriage 20, the distance 25 becoming smaller as the load increases (compare the Figures 6a) and 6b )).

In this exemplary embodiment, the energy accumulator 10 comprises a spring element 15, which is designed as a helical spring and a compression spring. In order to prevent the spring element 15 from buckling, a spring guide 46 is provided.

The connecting device 24 is essentially made up of a U-shaped bracket 44 and a coupling piece 45 connected to it. The connecting device 24 can just as easily be designed in one piece.

In summary, in this embodiment the rollers 22 of the carriage 20 are sprung. The U-shaped bracket 44 presses down against the force 12 of the spring 15.

Claims (8)

1. An article of furniture (29) having at least one folding-sliding door (2) which has at least two door leaves (4, 5) which are pivotably connected together, in particular by way of at least one door hinge (3), and which are moveable between a parallel position in which the at least two door leaves (4, 5) are oriented in a substantially mutually parallel relationship and a coplanar position in which the at least two door leaves (4, 5) are oriented in a substantially coplanar relationship, wherein the at least two door leaves (4, 5) are of the same width, and at least one stationary furniture part (6), wherein the article of furniture (29) has at least one arrangement (1) for guiding the at least one folding-sliding door (2) relative to the at least one stationary furniture part (6), wherein the arrangement (1) includes at least one guide rail (7)fixed to a stationary furniture part (6) and at least one guide device (8, 34) which is mounted moveably on the at least one guide rail (7) and is connected to the at least one folding-sliding door (2), wherein at least one vertical carrier (27) is provided, one of the at least two door leaves (4, 5) is connected to the at least one guide device (8, 34) and another of the at least two door leaves (4, 5) is pivotably connected to the at least one vertical carrier (27), preferably by way of at least one door hinge (28), preferably wherein the at least one folding-sliding door (2) is arranged substantially parallel to the at least one guide rail (7) when the at least two door leaves (4, 5) are arranged in the coplanar position and include substantially an angle (13) of about 90° relative to the at least one guide rail (7) when the at least two door leaves (4, 5) are arranged in the parallel position, characterised in that the at least one guide rail (7) includes at least one force storage means (9) and/or the at least one guide device (8, 34) includes at least one force storage means (10), at least one carriage (20) which can be supported by way of cylindrical, load-transmitting and cylindrical rolling bodies (21, 22, 23) serving as lateral support on the at least one guide rail (7), and at least one connecting device (24) mounted moveably relative to the at least one carriage (20) for connecting the at least one folding-sliding door (2) to the at least one guide device (34), wherein the at least one force storage means (10) acts on the at least one connecting device (24) relative to the at least one carriage (20) with a force (12), and that the at least one folding-sliding door (2) in the state of use can be subjected to a force (12) by the storage means (9, 10) in opposition to the force (11) due to weight, wherein the force (12) which can be exerted by the at least one force storage means (9, 10) on the at least one folding-sliding door (2) in opposition to the force (11) due to weight is dependent on the magnitude of the angle (13) that the at least one folding-sliding door (2) or the at least two door leaves (4, 5) include relative to the at least one guide rail (7), wherein the force (12) is at the greatest in an angle range of between 30° and 60°, preferably at an angle (13) of about 45°, wherein the at least one force storage means (9, 10) includes one or more spring elements (14, 15), preferably wherein at least one of the provided spring elements (14, 15) is in the form of a coil spring and/or a compression spring.
2. The article of furniture (29) according to claim 1, wherein the article of furniture (29) includes

   - at least one side compartment (30), preferably in shaft form, for at least region-wise, preferably completely, receiving the at least one folding-sliding door (2) when the at least two door leaves (4, 5) are arranged substantially in the parallel position, and/or

   - at least one internal space (31) for receiving kitchen furniture (32, 33), wherein the at least one internal space (31) can be covered at least region-wise outwardly by the at least one folding-sliding door (2) when the at least two door leaves (4, 5) are arranged substantially in the coplanar position.
3. The article of furniture (29) according to claim 1 or 2, wherein the at least one force storage means (9, 10) is adapted to provide a predetermined maximum force, preferably between 50 N and 150 N.
4. The article of furniture (29) according to one of claims 1 to 3, wherein the at least one guide rail (7) has at least one carrier (16) and at least one track (18) which is mounted moveably relative thereto and which preferably extends in a longitudinal direction (17) of the at least one guide rail (7), wherein the at least one force storage means (9) acts on the at least one track (18) relative to the at least one carrier (16) with a force (12).
5. The article of furniture (29) according to claim 4, wherein the at least one track (18) is arranged at a variable spacing (19) relative to the at least one carrier (16) .
6. The article of furniture (29) according to one of claims 1 to 5, wherein the at least one connecting device (24) is arranged at a variable spacing (25) relative to the at least one carriage (20).
7. The article of furniture (29) according to one of claims 1 to 6, wherein the arrangement (1) includes at least one transverse rail (26) arranged substantially transversely, preferably substantially perpendicularly, to the at least one guide rail (7).
8. The article of furniture (29) according to one of claims 1 to 7, wherein the at least one vertical carrier (27) is adapted to carry a greater load of the at least one folding-sliding door (2) than the at least one guide rail (7) and the at least one guide device (8, 34) mounted moveably thereto.

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