EP4431686A1 - Rail device and functional unit - Google Patents

Abstract

The rail device (2) has a rail axis (x) along which a carriage (5) of a support roller (51) and two guide rollers (52) can be guided, and comprises a first rail section (21) with a first support body (211) and a first guide channel (212), a second rail section (22) with a second support body (221) and a second guide channel (222), and a connecting device (3) by means of which mutually facing end pieces (21E, 22E) of the two rail sections (21, 22) are connected to one another. According to the invention, the rail device (2) further comprises a rail adapter (23) by means of which the first and second rail sections (21, 22) can be connected to one another at a selectable mutual distance, that the rail adapter (23) has a third support body (231) and a third guide channel (212), that the end piece (21E) of the first rail section (21) has a recess (210) into which the rail adapter (23) is completely or partially pushed, that the support bodies (211, 222, 231) of the first and second rail sections (21, 22) and of the rail adapter (23) are aligned coaxially with one another and form a support track (T1) which serves to support the support roller (51), and that the guide channels (212, 222, 232) of the first and second rail sections (21, 22) and of the rail adapter (23) are aligned coaxially with each other and have a completely or partially identical internal cross-section and form a first guide track (T21) or a first and a second guide track (T21, T22) which serve to guide the guide rollers (52).

Description

The invention relates to a rail device with at least two interconnected rail sections and a functional unit, in particular a piece of furniture, with at least one such rail device.

To close off functional units, such as openings in rooms or pieces of furniture, partitions are used, possibly foldable partitions such as folding doors or folding sliding doors. Partitions are preferably provided which can be moved into a door compartment or a parking space after the opening has been cleared, so as not to cause a nuisance.

The US9284761B2 discloses a piece of furniture with a sliding device by means of which a mounting profile connected to a folding sliding door can be moved within a door compartment. The folding sliding door comprises two door elements, of which the first door element is connected at the rear by stop hinges to a mounting profile and at the front by door hinges to the rear of a second door element, which is connected at the front to a guide carriage. The mounting profile is held in a vertical orientation by a support device and is provided with support carriages on the top and bottom, which are guided in a support rail. The guide carriage can be moved along a rail device which has three rail sections, of which a first and a second rail section are connected to one another by a third rail section running along a curve. The first rail section runs straight into the door compartment and the second rail section runs straight along the front of the piece of furniture. The guide carriage can therefore be moved between a first end stop and a second end stop by means of the guide rail.

To close the piece of furniture, the folding door is extended from the door compartment and unfolded. In the closed position, the door elements are aligned flat to one another. To open the piece of furniture, the folding door is folded back into place, with the door elements in an open position preferably aligned parallel to one another and retracted into the door compartment.

For functional and aesthetic reasons, it is usually desirable that the rail device has a prescribed length in all sectors so that rail sections can be precisely extended to the next rail section or precisely up to a wall. When installing a functional unit, it is therefore often necessary to cut rail sections to a required length and, if necessary, adapt them to the functional unit, which may deviate from the intended dimensions. The installation of the rail device and thus the functional unit can therefore cause considerable effort and require the provision of metalworking tools.

The present invention is therefore based on the object of creating an improved rail device which has at least two rail sections, as well as a functional unit with such a rail device.

The rail device according to the invention should be able to be installed with little effort and without metalworking tools. In particular, the cutting of rail sections should be eliminated. Rail sections for a functional unit with predetermined dimensions should therefore be able to be supplied in standard sizes.

The rail device should allow one or more drives to be optimally supported and/or guided. The rail device should also be suitable for holding and guiding any type of drive.

Drives should be able to move in the rail system as quietly and as wear-free as possible. Disturbing transitions or gaps between the rail sections should be avoided.

Furthermore, the rail device should have an advantageous appearance.

This object is achieved with a rail device according to claim 1 and a functional unit, optionally a piece of furniture, according to claim 15. Advantageous embodiments of the invention are specified in further claims.

The rail device, by means of which a running gear having at least one support roller and two guide rollers can be guided along a rail axis, comprises a first rail section with a first support body and a first guide channel, a second rail section with a second support body and a second guide channel, and a connecting device by means of which mutually facing end pieces of the two rail sections are connected to one another.

• dass die Schienenvorrichtung zudem einen Schienenadapter umfasst, mittels dessen der erste und zweite Schienenabschnitt in einem wählbaren gegenseitigen Abstand miteinander verbindbar sind,
• dass der Schienenadapter einen dritten Stützkörper, und einen dritten Führungskanal aufweist,
• dass das Endstück des ersten Schienenabschnitts eine Ausnehmung aufweist, in die der Schienenadapter ganz oder teilweise hinein verschoben ist,
• dass die Stützkörper des ersten und zweiten Schienenabschnitts und des Schienenadapters koaxial zueinander ausgerichtet sind und eine Stützbahn bilden, die dem Stützen der Tragrolle dient, und
• dass die Führungskanäle des ersten und zweiten Schienenabschnitts und des Schienenadapters koaxial zueinander ausgerichtet sind und einen ganz oder teilweise gleichen Innenquerschnitt aufweisen und eine erste Führungsbahn oder eine erste und eine zweite Führungsbahn bilden, die der Führung der Führungsrollen dienen.

According to the invention it is provided

• that the rail device further comprises a rail adapter by means of which the first and second rail sections can be connected to one another at a selectable mutual distance,
• that the rail adapter has a third support body and a third guide channel,
• that the end piece of the first rail section has a recess into which the rail adapter is completely or partially pushed,
• that the support bodies of the first and second rail sections and of the rail adapter are coaxially aligned with each other and form a support track which serves to support the support roller, and
• that the guide channels of the first and second rail sections and of the rail adapter are aligned coaxially with one another and have a completely or partially identical internal cross-section and form a first guide track or a first and a second guide track which serve to guide the guide rollers.

The rail adapter can therefore be fully or partially moved into the facing end piece of the first rail section, which is why the distance between the facing end pieces of the first rail section and the second rail section can also be optionally adjusted. Cutting the rail sections when installing the rail device is therefore not necessary, which is why they can be provided in standard sizes or standard lengths.

The rail adapter is adjustable or can optionally be moved into the corresponding end piece of the first rail section, which is why the rail adapter is also called an adjustable rail adapter.

The installation of the rail device in a functional unit, for example in a piece of furniture, can be carried out quickly and with little effort and, in particular, without metalworking tools.

The rail adapter, or essentially the front piece of the rail adapter, appears between the two rail sections. This solution not only advantageously connects the rail sections to one another. The rail adapter also creates an advantageous aesthetic feature.

The first and second rail sections are preferably made of metal. The rail adapter, however, can be made of metal or, particularly inexpensively, of plastic. A color or color combination that is visually advantageous can be selected for the rail adapter. Instead of a mechanical transition between the rail sections, which may be advantageous, a striking optical transition results that can be designed as desired. It does not matter how far apart the two rail sections are from each other. The rail adapter in between is always a distinctive feature.

• dass der erste Schienenabschnitt eine erste Frontwand, an der der erste Stützkörper vorgesehen ist, und ein erstes Kopfstück, in dem der erste Führungskanal vorgesehen ist, umfasst;
• dass der zweite Schienenabschnitt eine zweite Frontwand, an der der zweite Stützkörper vorgesehen ist, und ein zweites Kopfstück, in dem der zweite Führungskanal vorgesehen ist, umfasst; und
• dass der Schienenadapter eine dritte Frontwand, an der der dritte Stützkörper vorgesehen ist, und ein drittes Kopfstück, in dem der dritte Führungskanal vorgesehen ist, umfasst.

The rail elements for supporting and guiding the support rollers and guide rollers and/or stabilizing rollers can be arranged as desired. In a preferred embodiment,

• that the first rail section comprises a first front wall on which the first support body is provided and a first head piece in which the first guide channel is provided;
• that the second rail section comprises a second front wall on which the second support body is provided and a second head piece in which the second guide channel is provided; and
• that the rail adapter comprises a third front wall on which the third support body is provided and a third head piece in which the third guide channel is provided.

The rail device can therefore be designed for drives that have one or more support rollers, one or more guide rollers and one or more stabilizing rollers. The support roller is intended to take the load of the separating element connected to it. The guide rollers are intended to prevent the drive from rotating about a vertical axis and becoming transverse to the direction of travel. The optional stabilizing roller is typically intended to keep the drive in a vertical orientation.

In preferred embodiments, it is therefore optionally provided that the first rail section has a first stabilization channel, the second rail section has a second stabilization channel and the rail adapter has a third stabilization channel, which stabilization channels are aligned coaxially to one another and have a completely or partially identical internal cross-section and a first stabilization track or a first and form a second stabilization track, which serves to guide the stabilization rollers.

Preferably, the first stabilization channel is provided in the first support body, the second stabilization channel in the second support body and the third stabilization channel in the third support body. The support roller of the drive can therefore roll on the top side of the support body, while the stabilization roller can engage in the stabilization channel on the bottom side of the support body.

The rail adapter is designed in its dimensions to be completely or partially complementary to the recess in the end piece of the first rail section. The rail adapter can therefore be at least partially inserted into the associated end piece of the first rail section, whereby due to the complementary design of the rail adapter, the recess is or can be at least partially refilled in accordance with the dimensions of the removed material.

The rail adapter can be fully or partially inserted into the end piece of the first rail section, but preferably projects axially outwards beyond it, regardless of the extent of the mutual displacement.

The recess can be machined or formed into the end piece of the first rail section by mechanical processing, such as milling, or by molding and casting. In the Figures 8c and 9c Therefore, machining marks are drawn which mark the millings

• dass ein Teil des Stützkörpers des ersten Schienenabschnitts und ein Teil des Stützkörpers des Schienenadapters, die zur Bildung der Stützbahn beitragen, bei der Verschiebung des Schienenadapters seitlich nebeneinander gegeneinander verschoben werden, und/oder
• dass ein Teil des Führungskanals des ersten Schienenabschnitts und ein Teil des Führungskanals des Schienenadapters, die zur Bildung der Führungsbahnen beitragen, bei der Verschiebung des Schienenadapters oberhalb und unterhalb gegeneinander verschoben werden, und/oder
• dass ein Teil des Stabilisierungskanals des ersten Schienenabschnitts und ein Teil des Stabilisierungskanals des Schienenadapters, die zur Bildung der Stabilisierungsbahnen beitragen, bei der Verschiebung des Schienenadapters oberhalb und unterhalb gegeneinander verschoben werden.

Preferably,

• that a part of the support body of the first rail section and a part of the support body of the rail adapter, which contribute to the formation of the support track, are displaced side by side against each other when the rail adapter is displaced, and/or
• that a part of the guide channel of the first rail section and a part of the guide channel of the rail adapter, which contribute to the formation of the guide tracks, are displaced above and below each other when the rail adapter is displaced, and/or
• that a part of the stabilization channel of the first rail section and a part of the stabilization channel of the rail adapter, which contribute to the formation of the stabilization tracks, are displaced above and below each other when the rail adapter is displaced.

These measures ensure that the support roller and/or the guide rollers and/or the stabilizing roller always rest on a part of the support track, on a part of the guide tracks and on a part of the stabilizing tracks, even in the transition area between the rail sections. In the transition area, the support roller and/or the guide rollers and/or the stabilizing roller always rest on a part of the first support body and on a part of the third support body and/or on a part of the first guide channel and a part of the third guide channel and/or on a part of the first stabilizing channel and on a part of the third stabilizing channel. This results in a controlled and step-free transfer of the drive from the first rail section to the rail adapter and preferably further to the second rail section. The transition from the rail adapter to the second rail section can be implemented analogously with the same or different dimensions as the transition from the rail adapter to the first rail section. The facing end piece of the second rail section can therefore also have a recess into which the rail adapter is inserted. Preferably, however, the rail adapter and the front side of the second rail section lie flush with each other.

• dass der erste Schienenabschnitt im ersten Führungskanal ein Ausnehmungsteil aufweist, in das ein dazu komplementärer und sich nach aussen verjüngender Führungsflügel des dritten Führungskanals des Schienenadapters hinein ragt, oder
• dass der erste Schienenabschnitt im ersten Führungskanal auf einander gegenüberliegenden Seiten je ein Ausnehmungsteil aufweist, in die dazu komplementäre und sich nach aussen verjüngende Führungsflügel des dritten Führungskanals des Schienenadapters hinein ragen.

In preferred embodiments,

• that the first rail section in the first guide channel has a recess part into which a complementary and outwardly tapering guide wing of the third guide channel of the rail adapter projects, or
• that the first rail section in the first guide channel has a recess part on each of the opposite sides, into which complementary and outwardly tapering guide wings of the third guide channel of the rail adapter protrude.

The guide wings of the rail adapter, which protrude into the first guide channel of the first rail section, serve as auxiliary webs onto which the guide rollers can switch while they are still guided in the first guide channel.

• dass der erste Schienenabschnitt im ersten Stabilisierungskanal ein Ausnehmungsteil aufweist, in das ein dazu komplementärer und sich nach aussen verjüngender Stabilisierungsflügel des dritten Stabilisierungskanals des Schienenadapters hinein ragt, oder
• dass der erste Schienenabschnitt im ersten Stabilisierungskanal auf einander gegenüberliegenden Seiten je ein Ausnehmungsteil aufweist, in die dazu komplementäre und sich nach aussen verjüngende Stabilisierungsflügel des dritten Stabilisierungskanals des Schienenadapters hinein ragen.

In a further preferred embodiment, it is provided

• that the first rail section in the first stabilization channel has a recess part into which a complementary and outwardly tapering stabilization wing of the third stabilization channel of the rail adapter projects, or
• that the first rail section in the first stabilization channel has a recess part on each of the opposite sides, into which complementary and outwardly tapering stabilization wings of the third stabilization channel of the rail adapter protrude.

The stabilizing wings of the rail adapter, which protrude into the first stabilizing channel of the first rail section, serve as auxiliary bridges onto which the stabilizing roller can switch while it is still guided in the first stabilizing channel.

Preferably, the guide wings and/or the stabilizing wings each have two flanks inclined towards one another. For example, the guide wings and/or the stabilizing wings are triangular or trapezoidal in shape so that they can interact with complementary parts of the first guide channel, which may also be triangular or trapezoidal in shape.

It should be noted that the load of the separating element, possibly the load of a door or folding sliding door, is transferred to the rail device via the support roller of the drive.

In preferred embodiments, the support bodies of the first and second rail sections and of the rail adapter have a receiving channel, into which a running rod is inserted, which projects beyond the third support body of the rail adapter and preferably tapers on one side or both sides. The running rod is held on both sides in the receiving channels of the first and second rail sections and can therefore take on high loads. The support roller of the running gear is preferably provided with an annular groove into which the running rod can enter when the running gear travels over it. The support roller is thus stably supported and safely guided by the running rod.

In a further preferred embodiment, the first and second rail sections and the rail adapter each have at least one mounting channel, into which mounting channels, which are aligned coaxially with one another, a connecting rod is inserted. The mounting channels are preferably inserted into the support bodies of the first and second rail sections and the rail adapter, so that the support body of the rail adapter is held stable.

In a further preferred embodiment, it is provided that the head pieces of the first and second rail sections and of the rail adapter each have an installation channel, which installation channels are aligned coaxially with one another, that the connecting device has a connecting plate and locking screws held rotatably in the connecting plate and that the connecting plate is held axially displaceably in the installation channels and is fixed by means of the locking screws. In this way, the two rail sections and the rail adapter located between them can be connected to one another in a simple manner.

The solution according to the invention can be used advantageously for any rail device. The first and second rail sections can each run straight or at least partially along a curve. However, the first rail section can also run straight and the second rail section at least partially along a curve, or vice versa.

The rail device according to the invention can be advantageously installed and used in any functional units, in particular in pieces of furniture. A rail device according to the invention can also have more than two rail sections and more than one adjustable rail adapter.

Fig. 1

eine erfindungsgemässe Funktionseinheit 1 in der Ausgestaltung eines Möbelstücks mit einer Falttür 11 mit zwei durch Türscharniere 14 miteinander verbundenen Türelementen 111, 112 und einer Schienenvorrichtung 2, die einen entlang einer Kurve verlaufenden ersten Schienenabschnitt 21 und einen entlang der Front der Funktionseinheit 1 verlaufenden zweiten Schienenabschnitt 22 aufweist, die durch einen justierbaren Schienenadapter 23 miteinander verbunden sind, und in der ein Führungslaufwerk 5, welches eines der Türelemente 112 der Falttür 11 hält, verschiebbar gelagert ist;

Fig. 2

die Rückseite der Falttür 11 der Funktionseinheit 1 von Fig. 1 mit dem ersten Türelement 111, das an der nachlaufenden Kante durch Anschlagscharniere 13 mit einem Montageprofil 12 und an der vorlaufenden Kante durch Türscharniere 14 mit dem zweiten Türelement 112 verbunden ist, an dem das Führungslaufwerk 5 montiert ist und die Schienenvorrichtung 2 mit den ersten und zweiten Schienenabschnitten 21 und 22, die verkürzt dargestellt und durch den Schienenadapter 23, der schematisch gezeigt ist, miteinander verbunden sind;

Fig. 3

die Schienenvorrichtung 2 und das Führungslaufwerk 5 von Fig. 2 in einer vorzugsweisen Ausgestaltung von der Frontseite;

Fig. 4

das Endstück 21E des ersten Schienenabschnitts 21 von Fig. 3, das eine Ausnehmung 210 zur vollständigen oder teilweisen Aufnahme des Schienenadapters 23 aufweist, den freigestellten Schienenadapter 23 und das dem Schienenadapter 23 zugewandte Endstück 22E des zweiten Schienenabschnitts 22;

Fig. 5a

die Schienenvorrichtung 2 von Fig. 3 mit dem zweiten Schienenabschnitt 22 in Schnittdarstellung und mit eingesetztem Führungslaufwerk 5;

Fig. 5b

die Schienenvorrichtung 2 von Fig. 3 mit dem vom Schienenadapter 23 gelösten zweiten Schienenabschnitt 22;

Fig. 5c

die Schienenvorrichtung 2 von Fig. 3 mit dem Schienenadapter 23 von dem der erste Schienenabschnitt 21 und der zweite Schienenabschnitt 22 gelöst sind;

Fig. 6a

die Schienenvorrichtung 2 von Fig. 4 mit dem vom Schienenadapter 23 gelösten Endstück 21E des ersten Schienenabschnitts 21;

Fig. 6b

die Schienenvorrichtung 2 von Fig. 6a mit den durch den Schienenadapter 23 und eine Verbindungsvorrichtung 3 in einem vorgesehenen Abstand miteinander verbundenen Schienenabschnitten 21, 22;

Fig. 7a

den Schienenadapter 23 von Fig. 5 mit einer Verbindungsvorrichtung 3 und einer Verbindungsstange 9, mittels der die beiden Schienenabschnitte 21, 22 miteinander verbindbar sind und mit einer Laufstange 8, die zum Eingriff in die beiden Schienenabschnitte 21, 22 vorgesehen ist und über die die gezeigte Tragrolle 51 des Führungslaufwerks 5 von Fig. 4a abrollen kann;

Fig. 7b

den Schienenadapter 23 von Fig. 7a ohne die Verbindungsvorrichtung 3, die Verbindungsstange 9 und die Laufstange 8;

Fig. 7c

den Schienenadapter 23 von Fig. 7b in einer weiteren vorzugsweisen Ausgestaltung mit einer an der Frontwand 23F vorgesehenen Rückstossfeder 235;

Fig. 7d

den Schienenadapter 23 von Fig. 7c eingesetzt zwischen den Endstücken 21E, 22E des ersten und zweiten Schienenabschnitts 21, 22;

Fig. 8a

die Rückseite des Schienenadapters 23 von Fig. 6a, der in eine Ausnehmung 210 im zugewandten Endstück 21E des ersten Schienenabschnitts 21 teilweise eingeführt ist;

Fig. 8b

den Schienenadapter 23 von Fig. 8a, der vollständig in die Ausnehmung 210 im zugewandten Endstück 21E des ersten Schienenabschnitts 21 eingeführt ist;

Fig. 8c

den ersten Schienenabschnitt 21 von Fig. 8a mit dem Endstück 21E, in das die Ausnehmung 210 eingearbeitet ist;

Fig. 9a

den Schienenadapter 23 und den ersten Schienenabschnitt 21 von Fig. 8a von oben;

Fig. 9b

den Schienenadapter 23 und den ersten Schienenabschnitt 21 von Fig. 8b von oben;

Fig. 9c

den ersten Schienenabschnitt 21 von Fig. 8c mit dem Endstück 21E, in das die Ausnehmung 210 eingearbeitet ist, aus einem anderen Blickwinkel;

Fig. 10a

die Schienenvorrichtung 2 in Schnittdarstellung entlang der Schnittlinie A - A von Fig. 6b mit Blick auf eine Innenseite; und

Fig. 10b

die Schienenvorrichtung 2 in Schnittdarstellung entlang der Schnittlinie A - A von Fig. 6b mit Blick auf eine andere Innenseite.

The invention is explained in more detail below with reference to drawings.

Fig.1

a functional unit 1 according to the invention in the design of a piece of furniture with a folding door 11 with two door elements 111, 112 connected to one another by door hinges 14 and a rail device 2 which has a first rail section 21 running along a curve and a second rail section 22 running along the front of the functional unit 1, which are connected to one another by an adjustable rail adapter 23, and in which a guide carriage 5, which holds one of the door elements 112 of the folding door 11, is slidably mounted;

Fig.2

the back of the folding door 11 of the functional unit 1 of Fig.1 with the first door element 111, which is connected at the trailing edge by stop hinges 13 to a mounting profile 12 and at the leading edge is connected by door hinges 14 to the second door element 112 on which the guide carriage 5 is mounted and the rail device 2 with the first and second rail sections 21 and 22, which are shown in abbreviated form and are connected to one another by the rail adapter 23, which is shown schematically;

Fig.3

the rail device 2 and the guide drive 5 of Fig.2 in a preferred embodiment from the front side;

Fig.4

the end piece 21E of the first rail section 21 of Fig.3 , which has a recess 210 for completely or partially receiving the rail adapter 23, the released rail adapter 23 and the end piece 22E of the second rail section 22 facing the rail adapter 23;

Fig. 5a

the rail device 2 of Fig.3 with the second rail section 22 in sectional view and with the guide carriage 5 inserted;

Fig. 5b

the rail device 2 of Fig.3 with the second rail section 22 detached from the rail adapter 23;

Fig. 5c

the rail device 2 of Fig.3 with the rail adapter 23 from which the first rail section 21 and the second rail section 22 are detached;

Fig. 6a

the rail device 2 of Fig.4 with the end piece 21E of the first rail section 21 detached from the rail adapter 23;

Fig. 6b

the rail device 2 of Fig. 6a with the rail sections 21, 22 connected to one another at a predetermined distance by the rail adapter 23 and a connecting device 3;

Fig. 7a

the rail adapter 23 from Fig.5 with a connecting device 3 and a connecting rod 9, by means of which the two rail sections 21, 22 can be connected to one another and with a running rod 8 which is intended to engage in the two rail sections 21, 22 and over which the shown support roller 51 of the guide carriage 5 of Fig. 4a can roll;

Fig. 7b

the rail adapter 23 from Fig. 7a without the connecting device 3, the connecting rod 9 and the running rod 8;

Fig. 7c

the rail adapter 23 from Fig. 7b in a further preferred embodiment with a recoil spring 235 provided on the front wall 23F;

Fig. 7d

the rail adapter 23 from Fig. 7c inserted between the end pieces 21E, 22E of the first and second rail sections 21, 22;

Fig. 8a

the back of the rail adapter 23 from Fig. 6a which is partially inserted into a recess 210 in the facing end piece 21E of the first rail section 21;

Fig. 8b

the rail adapter 23 from Fig. 8a which is fully inserted into the recess 210 in the facing end piece 21E of the first rail section 21;

Fig. 8c

the first rail section 21 of Fig. 8a with the end piece 21E, into which the recess 210 is machined;

Fig. 9a

the rail adapter 23 and the first rail section 21 of Fig. 8a from above;

Fig. 9b

the rail adapter 23 and the first rail section 21 of Fig. 8b from above;

Fig. 9c

the first rail section 21 of Fig. 8c with the end piece 21E, into which the recess 210 is machined, from a different angle;

Fig. 10a

the rail device 2 in sectional view along the section line A - A of Fig. 6b with a view of an inner side; and

Fig. 10b

the rail device 2 in sectional view along the section line A - A of Fig. 6b with a view of another interior.

Fig.1 shows a functional unit 1 according to the invention in the design of a piece of furniture 1 with a folding door 11, which can be inserted into a first door compartment 10, and with a one-piece door 11', which can be inserted into a second door compartment 10.

The piece of furniture 1 preferably has side walls 1A, an upper floor 1B, a lower floor 1C and partition walls 1D on both sides, which delimit the door compartments 10 together with the side walls 1A.

The folding door 11 has a first separating element or door element 111, which is connected on one side by stop hinges 13 to a mounting profile 12, and on the other side by door hinges 14 to a second separating element or door element 112, the dimensions of which preferably correspond to the dimensions of the first door element 111. The folding door 11 is slightly unfolded and can either be completely folded and retracted into the door compartment 10 with the door elements 111, 112 aligned parallel to one another, or completely unfolded and transferred to a closed position in which the two door elements 111, 112 are at least approximately aligned in one plane.

In the design of Fig.1 the mounting profile 12 is held by a sliding device 19, which is shown schematically, and can be moved within the associated door compartment 10. The doors 11 are aligned parallel to the side wall 1A in front of the associated door compartment 10 and can then be moved into the door compartment 10. For the movement within the door compartment 10, each mounting profile 12 can also be provided with drive devices. The mounting profile 12 is preferably connected on the top to a support carriage 15, which can be moved along an associated guide rail 16 into the door compartment 10. The mounting profile 12 can also be connected on the bottom to a carriage that is guided in a guide rail.

The second door element 112 of the folding door 11 is connected at the leading edge to a guide carriage 5 which is guided in a rail device 2, which is shown fragmentarily. The rail device 2 comprises a first rail section 21 which runs along an arc into the associated door compartment 10, and a second rail section 22 which extends along the front of the piece of furniture 1. The two rail sections 21, 22 are connected by an adjustable rail adapter 23 (see Fig. 5c ) are connected to one another. The rail adapter 23 can be displaced by a corresponding amount into a recess 210 provided in the facing end piece 21E of the first rail section 21 in order to compensate for tolerances when cutting the second rail section 22 or when manufacturing the piece of furniture 1. The second rail section 22 can therefore be supplied with a standard size and installed in the rail device 2 in a simple manner by displacing the rail adapter 23 into the end piece 21E of the first rail section 21 as required.

The folding door 11 is therefore held at the front by means of the guide drive 5, which can be moved along the front of the piece of furniture 1 when the folding door 11 is unfolded and into the door compartment 10 when the folding door 11 is folded. The guide drive 5 always runs ahead of the second door element 112 in the direction of movement.

Fig.2 shows the back of the folding door 11 of the functional unit 1 of Fig.1 with the first door element 111, which in this embodiment is connected at the trailing edge by stop hinges 13 to the mounting profile 12 and at the leading edge by door hinges 14 and mounting parts 17 to the second door element 112, on the front side of which the guide drive 5 is mounted.

Also shown is the support carriage 15 connected to the mounting profile 12, which can be moved along the support rail 16. The guide carriage 5 and the support carriage 15 are each provided with a carriage body 54, 154, with a support roller 51, 151 and with two guide rollers 52, 152.

The rail device 2, in which the guide carriage 5 is guided, consists of two interconnected rail sections 21, 22. The rail device with the support rail 16 can also consist of several rail sections that can be connected or are connected to one another by rail adapters 23 according to the invention. The invention is exemplified with reference to the rail device 2 provided for the guide carriage 5.

The two rail sections 21, 22 have cross-sections that correspond to one another and each comprise a front wall 21F, 22F with a head piece 21T, 22T and a foot piece 21B, 22B. A support body 211, 221 is provided on each front wall 21F, 22F and a guide channel 212, 222 is provided in each head piece 21T, 22T. The support bodies 211, 221, which serve to support the support roller 51 of the guide carriage 5, and the guide channels 212, 222, which serve to guide the guide rollers 52 of the guide carriage 5, are coaxially aligned with one another at the front and are connected to one another by the rail adapter 23. The schematically shown rail adapter 23 allows the rail sections 21, 22 to be moved against each other and also ensures a safe and stepless transition of the guide carriage 5 between the rail sections 21, 22.

Fig.3 shows the rail device 2 and the guide carriage 5 of Fig.2 in a preferred embodiment from the front side. In this embodiment, the guide carriage 5 is additionally provided with a stabilizing roller 53 and a coupling device 55, by means of which the held door element 112 can be coupled. It can be seen that the axes of rotation of the guide rollers 52 and the axis of rotation of the stabilizing roller 53 are aligned perpendicular to the axis of rotation of the support roller 51.

It is shown that the support roller 51 can be supported on the support body 221 of the second rail section 22, whereby the guide rollers 52 can be introduced into the guide channel 222 and the stabilizing roller 53 into a stabilizing channel 223 on the underside of the support body 221. The load acting from the door element 112 is transferred to the rail device 2 via the support roller 51. The guide rollers 52 ensure that the guide carriage 5 cannot rotate relative to the rail axis x. The guide rollers 52 and the stabilizing roller 53 also ensure that the guide carriage 5 is held in a vertical alignment.

The rail device 2 according to the invention, which comprises the two rail sections 21, 22 connected to one another by the rail adapter 23, can, however, also be implemented for drives in a different configuration. For example, it can be provided that the guide rollers 52 are arranged below the support roller 51 and in the Stabilization channel 223. The optionally provided stabilization roller 53 can, however, be arranged above the support roller 51 and guided in the guide channel 222.

In the present embodiment, the rail device 2 comprises a support track T1, which is realized by the support bodies 211, 221 of the two rail sections 21, 22 and by a support body 231 of the rail adapter 23 (see Fig.4 ). Furthermore, the rail device 2 comprises two guideways T21, T22, which are realized by the guide channels 212, 222 of the two rail sections 21, 22 and by a guide channel 232 of the rail adapter 23 (see Fig.4 ). In addition, the rail device 2 comprises two stabilization tracks T31, T32, which are realized by the stabilization channels 213, 223 of the two rail sections 21, 22 and by a stabilization channel 233 of the rail adapter 23 (see Fig.4 ).

The rail adapter 23 is held between the mutually facing end pieces 21E, 22E of the two rail sections 21, 22 and is preferably dimensioned such that it always protrudes from the end piece 21E of the first rail section 21 and is visible. The first and second rail sections 21, 22 are preferably made of metal. The rail adapter 23 is preferably made of metal or plastic. The rail adapter 23 preferably has a color that advantageously stands out between the two rail sections 21, 22.

The two rail sections 21, 22 and the rail adapter 23 (see Fig.4 ) preferably each have an installation channel 217, 227, 237 into which a connecting plate 31 of a connecting device 3 can be inserted, which can be tightened by means of locking screws 32 in order to mutually fix the rail sections 21, 22 and the rail adapter 23 in a selected position.

It is shown that the rear end piece of the first rail section 21 is connected to a connecting rail 24 by a further connecting device 3 and optionally a further rail adapter 23. The holding rail 16 is connected to a cover 161.

Fig.4 shows the end piece 21E of the first rail section 21 of Fig.3 , which has a recess 210 for completely or partially receiving the rail adapter 23, the released rail adapter 23 and the end piece 22E of the second rail section 22 facing the rail adapter 23.

It is shown that the two rail sections 21, 22 and the rail adapter 23 each have a front wall 21F, 22F, 23F, a head piece 21T, 22T, 23T, as well as an upper back piece 21R, 22R, 23R and a lower back piece 21S, 22S, 23S, which form channel walls of the guide channels 212, 222, 232 and the stabilization channels 213, 223, 233.

Furthermore, it is shown (regarding the first rail section 21 see also Fig. 8c ) that the two rail sections 21, 22 and the rail adapter 23 each have a receiving channel 218, 228, 238 and a mounting channel 219, 229, 239.

To connect the two rail sections 21, 22 to the rail adapter 23, a connecting rod 9 is inserted into the mounting channels 219, 229, 239. The mounting channels 219, 229, 239 preferably pass through the support bodies 211, 221, 231, which is why the support body 231 of the rail adapter 23 is held particularly stable by the connecting rod and can absorb the load acting via the support roller 51 without being deformed.

The connecting rod 9 also ensures that the support bodies 211, 222, 231 of the first and second rail sections 21, 22 and the rail adapter 23 are coaxially aligned with one another and form the support track T1, and that the guide channels 212, 222, 232 of the first and second rail sections 21, 22 and the rail adapter 23 are coaxially aligned with one another and form the first guide track T21 or the first and second guide tracks T21, T22. The support track T1 and the guide tracks T21, T22 therefore run parallel to the rail axis x without steps or edges even under the influence of the load.

It is also possible for the guide channels 212, 222, 232 to guide the guide rollers 52 of the drive 5 only on one side. It is also possible for the stabilization channels 213, 223, 233 to guide the stabilization roller 53 only on one side. The inner cross sections of the guide channels 212, 222, 232 and the stabilization channels 213, 223, 233 therefore preferably have the same inner cross section in whole or in part. In preferred embodiments, the guide channels 212, 222, 232 and/or the stabilization channels 213, 223, 233 have a U-profile or an L-profile.

The receiving channels 218, 228, 238, into which a running rod 8 is inserted, are provided on the upper side of the support bodies 211, 221, 231 and preferably open upwards. The running rod 8 is preferably rotationally symmetrical and preferably tapers on both sides towards the adjacent rail sections 21, 22, so that it area of the rail adapter 23 has the largest diameter. For example, the running rod 8 is cylindrical in the middle and conical on both sides.

Preferably, the running rod 8 can emerge upwards from the receiving channels 218, 228, 238 or at least from the receiving channel 238 of the rail adapter 23 and thus interact with the support roller 51 of the running gear 5.

The support roller 51 therefore preferably already moves onto the running rod 8 within the end piece 21E of the first rail section 21 and only leaves the running rod 8 after reaching the second rail section 22. The support roller 51 preferably has a circumferential annular groove 510 approximately in the middle, into which the running rod 8 can enter. The support roller 51 is thus securely supported in the transition area and additionally guided laterally.

The running rod 8 can also form part of the support track T1 in another way and be flush or almost flush with the top of the support body 231 and take up the load of the support roller 51. In this embodiment, the running rod 8 preferably has a rectangular cross-section in the area of the receiving channel 238, so that a support roller 51 which does not have an annular groove 51 is optimally supported.

The end piece 21E of the first rail section 21 has a recess 210 into which the rail adapter 23 can be inserted. In the area of the guide channel 232, the rail adapter 23 has a guide wing 2321 on one side or a guide wing 2321, 2322 on both sides. In the area of the stabilization channel 233, the rail adapter 23 has a stabilization wing 2331 on one side or a stabilization wing 2331, 2332 on both sides. The guide wing 2321 or the guide wings 2321, 2322, which are triangular in this embodiment, form extensions of the guide channel 232 of the rail adapter 23 and at the same time parts of the guide channel 212 within the first rail section 21. The stabilizing wing 2331 or the stabilizing wings 2331, 2332, which are triangular in this embodiment, form extensions of the stabilizing channel 233 of the rail adapter 23 and at the same time parts of the stabilizing channel 213 within the first rail section 21, as shown in Fig. 10a and Fig. 10b is shown.

Fig. 5a shows the rail device 2 of Fig.3 with the second rail section 22 in sectional view and with guide carriage 5 inserted.

Fig. 5b shows the rail device 2 of Fig.3 with the second rail section 22 detached from the rail adapter 23.

Fig. 5c shows the rail device 2 of Fig.3 with the released rail adapter 23, from which the first rail section 21 and the second rail section 22 are detached.

Fig. 6a shows the rail device 2 of Fig.4 with the end piece 21E of the first rail section 21 detached from the rail adapter 23.

Fig. 6b shows the rail device 2 of Fig. 6a with the rail sections 21, 22 connected to one another at a predetermined distance by the rail adapter 23 and a connecting device 3. It is clear that manufacturing tolerances can be easily compensated by means of the rail adapter 23. It is also clear that the recessed rail adapter 23 can be made to stand out visually by means of appropriate coloring.

Fig. 7a shows the rail adapter 23 of Fig.5 with a connecting device 3 and a connecting rod 9, by means of which the two rail sections 21, 22 can be connected to one another and with a running rod 8, which is provided for engagement in the two rail sections 21, 22 and via which the shown support roller 51 of the guide carriage 5 of Fig. 5a can roll off. The connecting rod 9 inserted into the support body 231 is also shown. It can be seen that the guide wings 2321, 2322 delimit the guide channel 232 and the stabilizing wings 2331, 2332 delimit the stabilizing channel 233 and expand it in one direction. If recesses 210 are provided in the end pieces 21E, 22E in both rail sections 21, 22, the rail adapter 23 is preferably designed symmetrically, with guide wings 2321, 2322 and stabilizing wings 2331, 2332 pointing in opposite directions.

Fig. 7b shows the rail adapter 23 of Fig.5 without the connecting device 3, the connecting rod 9 and the running rod 8. This base body of the rail adapter 23 can advantageously be manufactured as a die-cast part from a plastic mass.

Fig. 7c shows the rail adapter 23 of Fig. 7b in a further preferred embodiment with a recoil spring 235 provided on the front wall 23F, which engages in the recess 210 in the facing end piece 21E of the first rail section 21 and rests within the recess 210 on the front wall 21F of the first rail section 21 and a Exerts recoil force on the rail adapter 23 and presses it against the front side of the second rail section 22. After the rail adapter 23 has been inserted into the recess 210 and the two rail sections 21, 22 are moved against each other, the rail adapter 23 therefore always lies flush against the front side of the second rail section 22.

Preferably, the rail adapter 23 is therefore preferably provided or connected in one piece with at least one adapter part, which serves to connect the rail adapter 23 to the second rail adapter 22 in a form-fitting and/or force-fitting manner.

At least one adapter part can be provided that pushes the rail adapter 23 against the second rail section 22 or pulls it against the second rail section 22. The end piece 22E of the second rail section 22 can, for example, be connected to the rail adapter 23 in a form-fitting manner and can, for example, be provided with recesses into which an adapter part engages.

Fig. 7d shows the rail adapter 23 of Fig. 7c inserted between the end pieces 21E, 22E of the first and second rail sections 21, 22. The rail adapter 23 is held by the adapter part or the recoil spring 235 on the front side of the end piece 22E of the second rail section 22, so that the connecting device 3 can be fixed by tightening the screw 32 without first accessing the rail adapter 23.

Fig. 8a shows the back of the rail adapter 23 of Fig. 6a which is partially inserted into the recess 210 in the facing end piece 21E of the first rail section 21.

Fig. 8b shows the rail adapter 23 of Fig. 8a which is fully inserted into the recess 210 in the facing end piece 21E of the first rail section 21.

Fig. 8a and Fig. 8b therefore illustrate the process of adjusting the rail adapter 23 which, if necessary, is moved into the recess 210 in the end piece 21E.

Due to the shape of the guide wings 2321, 2322 and the stabilizing wings 2331, 2332, it is ensured that the guide rollers 52 and the stabilizing roller 53 are positioned within the guide channel 212 of the first rail section 21 and the guide channel 232 of the rail adapter 23 and within the stabilization channel 213 of the first rail section 21 and the stabilization channel 233 of the rail adapter 23 are always safely guided on one or both sides. In the transition area, the guide rollers 52 and the stabilization roller 53 are guided both through the first rail section 21 and through the rail adapter 23.

Fig. 8c shows the first rail section 21 of Fig. 8a with the end piece 21E, in which the recess 210 is machined, which comprises various receiving parts. The recess part 2123T is cut out in the head part 21T, into which the head part 23T of the rail adapter 23 can enter.

Adjacent to the recess part 2123T in the head part 21T, recess parts 212321, 212322 are cut out in the front wall 21F and in the upper back part 21R, into which the guide wings 2321, 2322 of the rail adapter 23 can enter.

The support body 211 has a recess part 21231 into which the support body 231 of the rail adapter 23 can enter.

Adjacent to the recess part 21231 in the support body 211, recess parts 212331, 212332 are cut out in the front wall 21F and in the lower back piece 21S, into which the stabilizing wings 2321, 2322 of the rail adapter 23 can enter.

Furthermore, a recess 2123F is inserted into the front wall 21F, into which the front wall 23F of the rail adapter 23 can enter.

Fig. 9a shows the rail adapter 23 and the first rail section 21 of Fig. 8a from above.

Fig. 9b shows the rail adapter 23 and the first rail section 21 of Fig. 8b from above.

Fig. 9c shows the first rail section 21 of Fig. 8c with the end piece 21E, in which the recess 210 is machined, from a viewing angle showing the recess parts 212321, 212322.

Fig. 10a shows the rail device 2 in a sectional view along the section line A - A of Fig. 6b looking at the rear of the front wall 21F, 22F, 23F of the first and second rail sections 21, 22 and the rail adapter 23.

Fig. 10b shows the rail device 2 in a sectional view along the section line A - A of Fig. 6b looking at the back of the upper back piece 21R, 22R, 23R and the lower back piece 21S, 22S, 23S of the two rail sections 21, 22 and the rail adapter 23.

Also shown are the support track T1, the guide tracks T21, T22 and the stabilization tracks T31, T32, which extend uninterruptedly and continuously through the rail device 2, regardless of the set mutual distance between the two rail sections 21, 22.

List of reference symbols:

1

Functional unit, piece of furniture, especially cupboard

1A

Side walls

1B

Topsoil

1C

Underbody

1D

partition

10

first or second door compartment 10 or parking space

100

Interior of functional unit 1

11

Folding door

111

first door element

112

second door element

11'

one-piece door

12

Mounting profile

13

Stop hinges

14

Door hinges

15

Supporting chassis

151

Support rollers

152

Leadership roles

154

Drive body

16

Support rail

161

Aperture

17

Mounting part, hinge cup

19

Shifting device

2

Rail device

21

first rail section

210

Recess

2123B

Recess in the foot piece

2123F

Recess in the front wall

2123T

Recess in the headpiece

212321, 212322

Recessed parts in the guide channel 212

212331, 212332

Recessed parts in the stabilization channel 213

21B

Foot piece

21E

End piece of the first rail section 21

21F

Front wall

21R

upper back piece

21S

lower back piece

21T

Headpiece

211

Support body

212

Guide channel

213

Stabilization channel

217

Mounting channel

218

Recording channel

219

Mounting channel

22

second rail section

22B

Foot piece

22E

End piece of the second rail section 22

22F

Front wall

22R

upper back piece

22S

lower back piece

22T

Headpiece

221

Support body

222

Guide channel

223

Stabilization channel

226

Installation plate

227

Installation channel

228

Recording channel

229

Mounting channel

23

adjustable rail adapter

23B

Foot piece

23F

Front wall

23R

upper back piece

23S

lower back piece

23T

Headpiece

231

Support body

232

Guide channel

2321

first leading wing

2322

second leading wing

233

Stabilization channel

2331

first stabilization wing

2332

second stabilization wing

235

Recoil spring

237

Installation channel

238

Recording channel

239

Mounting channel

24

End rail

3

Connecting device

31

Connecting plate

32

Locking screws

5

Guide drive

51

Support roller

510

Ring groove

52

Leadership roles

53

Stabilization role

54

Drive body

55

Coupling device

8

Running bar

9

Connecting rod

T1

Support track

T21, T22

Guideways

T31, T32

Stabilization tracks

x

Rail axis

Claims (15)

Rail device (2) with a rail axis (x) along which a carriage (5) can be guided, which has a support roller (51) and two guide rollers (52), comprising a first rail section (21) with a first support body (211), and a first guide channel (212), a second rail section (22) with a second support body (221) and a second guide channel (222), and a connecting device (3) by means of which mutually facing end pieces (21E, 22E) of the two rail sections (21, 22) are connected to one another, characterized by that the rail device (2) comprises a rail adapter (23) by means of which the first rail section (21) and the second rail section (22) can be connected to one another at a selectable mutual distance, that the rail adapter (23) has a third support body (231) and a third guide channel (212), that the end piece (21E) of the first rail section (21) has a recess (210) into which the rail adapter (23) is completely or partially displaced, that the first, second and third support bodies (211, 222, 231) are aligned coaxially with each other and form a support track (T1) which serves to support the support roller (51), and that the first, second and third guide channels (212, 222, 232) are aligned coaxially with one another and have a completely or partially identical internal cross-section and form a first guide track (T21) or a first and a second guide track (T21, T22) which serve to guide the guide rollers (52). Rail device (2) according to claim 1, characterized in that the first rail section (21) comprises a first front wall (21F) on which the first support body (211) is provided, and a first head piece (21T) in which the first guide channel (212) is provided; that the second rail section (22) comprises a second front wall (22F) on which the second support body (221) is provided, and a second head piece (22T) in which the second guide channel (222) is provided; and that the rail adapter (23) comprises a third front wall (23F) on which the third support body (231) is provided, and a third head piece (23T) in which the third guide channel (232) is provided. Rail device (2) according to claim 1 or 2, characterized in that the rail device (2) is suitable for guiding a carriage (5) which has a support roller (51), two guide rollers (52) and a stabilizing roller (53), and that the first rail section (21) has a first stabilizing channel (213), the second rail section (22) has a second stabilizing channel (223) and the rail adapter (23) has a third stabilizing channel (233), which stabilizing channels (213, 223, 233) are aligned coaxially with one another and have a completely or partially identical internal cross-section and form a first stabilizing track (T31) or a first and a second stabilizing track (T31, T32) which serve to guide the stabilizing rollers (53). Rail device (2) according to claim 3, characterized in that the first stabilization channel (213) is provided in the first support body (211), that the second stabilization channel (223) is provided in the second support body (221) and that the third stabilization channel (233) is provided in the third support body (231). Rail device (2) according to one of claims 1 - 4, characterized in that the rail adapter (23) is designed in its dimensions to be completely or partially complementary to the recess (210) in the end piece (21E) of the first rail section (21), or that the rail adapter (23) is designed in its dimensions to be completely or partially complementary to the recess (210) in the end piece (21E) of the first rail section (21), and that the rail adapter (23) completely inserted into the end piece (21E) of the first rail section (21) protrudes from the end piece (21E) of the first rail section (21) or is completely received therein. Rail device (2) according to one of claims 1 - 5, characterized in that the first rail section (21) in the first guide channel (212) has a first recess part (212321) into which a complementary and outwardly tapering guide wing (2321) of the third guide channel (232) of the rail adapter (23) projects, or that the first rail section (21) in the first guide channel (212) has a first and a second recess part (212321, 212322) on opposite sides, into which complementary and outwardly tapering guide wings (2321, 2322) of the third guide channel (232) of the rail adapter (23) protrude. Rail device (2) according to one of claims 2 - 6, characterized in that the first rail section (21) in the first stabilization channel (213) has a third recess part (212331) into which a complementary and outwardly tapering stabilization wing (2331) of the third stabilization channel (233) of the rail adapter (23) projects, or that the first rail section (21) in the first stabilization channel (213) has a third and fourth recess part (212331, 212332) on opposite sides, into which complementary and outwardly tapering stabilization wings (2321, 2322) of the third stabilization channel (233) of the rail adapter (23) protrude. Rail device (2) according to claim 6 or 7, characterized in that the guide wings (2321, 2322) each have two flanks inclined towards each other, or that the stabilizing wings (2321, 2322) each have two flanks inclined towards each other, or that the guide wings (2321, 2322) and the stabilizing wings (2321, 2322) each have two flanks inclined towards each other. Rail device (2) according to one of claims 1 - 8, characterized in that the support bodies (211, 222, 231) of the first and second rail sections (21, 22) and of the rail adapter (23) have a receiving channel (218, 228, 238) into which a running rod (8) is inserted, which projects beyond the third support body (231) of the rail adapter (23) and preferably tapers on one side or both sides or which adjoins the upper side of the third support body (231). Rail device (2) according to one of claims 1 - 9, characterized in that the first and second rail sections (21, 22) and the rail adapter (23) each have at least one mounting channel (219, 229, 239), into which mounting channels (219, 229, 239), which are aligned coaxially with one another, a connecting rod (9) is inserted, or that the support bodies (211, 222, 231) of the first and second rail sections (21, 22) and of the rail adapter (23) each have at least one mounting channel (219, 229, 239), into which mounting channels (219, 229, 239), which are aligned coaxially to one another, a connecting rod (9) is inserted. Rail device (2) according to one of claims 1 - 10, characterized in that the head pieces (21T, 22T, 23T) of the first and second rail sections (21, 22) and of the rail adapter (23) each have an installation channel (217, 227, 237), which installation channels (217, 227, 237) are aligned coaxially with one another, that the connecting device (3) has a connecting plate (31) and locking screws (32) rotatably held in the connecting plate (31), and that the connecting plate (31) is held axially displaceably in the installation channels (217, 227, 237) and is fixed by means of the locking screws (32). Rail device (2) according to one of claims 1 - 11, characterized in that the first and second rail sections (21, 22) each run straight or each at least partially along a curve or that the first rail section (21) runs straight and the second rail section (22) runs at least partially along a curve. Rail device (2) according to one of claims 1 - 12, characterized in that the mutually facing end pieces (21E, 22E) of the first and second rail sections (21, 22) have the same structure and the rail adapter (23) is adapted to both end pieces (21E, 22E) or that the end piece (22E) and the rail adapter (23) lie against one another at the end in one plane. Rail device (2) according to one of claims 1 - 13, characterized in that the first and the second rail section (21, 22) are made of metal and that the rail adapter (23) is made of metal or plastic, or that the first and the second rail section (21, 22) are made of metal and that the rail adapter (23) is made of metal or plastic and is provided with a color. Functional unit (1) with a rail device (2) according to one of claims 1 - 14.

Images