EP3498131B1 - Removal guide - Google Patents

Description

The invention relates to a pull-out guide for pulling out a pull-out furniture part from a furniture body, comprising at least three rails, which comprise a body-side first rail, a pull-out side rail and a middle rail arranged between the first and second rails and which between an insertion position of the rails , in which the rails are fully inserted into one another, and an extended position of the rails in which the rails are fully extended, are displaceably guided relative to one another, and a displacement device, of which the rails automatically move into the inserted position in a last section of the insertion of the extended guide are displaceable and which has a guide part arranged on the central rail, of which a first and a second toothed rack, which are coupled via at least one toothed wheel, are displaceably guided, a first coupling with the first toothed rack is connected part, which cooperates with a arranged on the first rail or a part connected to the first driver, and connected to the second rack, a second coupling part which cooperates with a second carrier arranged on the second rail or a part connected, wherein when pulling out the pull-out guide in a pull-out direction, starting from the insertion position of the rails, the first driver is coupled to the first coupling part and the second driver is coupled to the second coupling part and the first and second toothed racks starting from a respective basic position, which is the first and second toothed rack take in the insertion position of the rails, are moved in opposite directions to a respective waiting position, which they reach in an intermediate position of the rails and in which the first driver decouple from the first coupling part and the second driver from the second coupling part and in which the respective rack when the Pull-out guide remains, and when the pull-in guide is pushed in when the intermediate position of the rails is reached, the first and second drivers are coupled to the first and second coupling parts.

Sliding devices for pull-out guides of pull-out furniture parts, for example drawers, in the form of pull-down devices (also known as self-retraction or pull-in mechanisms), which pull the pull-out furniture part automatically over a last section of the drive-in path and thus ensure the fully retracted condition of the pull-out furniture part, are known in different embodiments. For example, the AT 401334 B a feed mechanism, in which there is a tilting slide that can be moved against the force of a spring. The tilting slide comprises a slide which can be displaced in a straight line in the pull-out direction of the drawer against the force of the spring, and a tilting part which can be tilted about a tilting axis. With the from the AT 393948 B known pull-in device, there is also a tilt slide which is displaceable along a guideway against the force of a spring. The guideway has a straight section and a curved section, which causes the tilting slide to pivot about an imaginary tilting axis into its tilted end position.

Nowadays, closing devices are usually equipped with insertion dampers in order to dampen the retracting movement of the pull-out furniture part in the last section of the entry path. Such a damped closing device, in which the tilting slide interacts with an insertion damper, is known, for example, from US Pat EP 1 532 892 A1 known. The spring-loaded tilt slide interacts here with a linear damper in the form of a piston-cylinder unit, which acts in particular pneumatically. Self-retraction damped by means of rotary dampers is also known.

From the EP 2 129 260 A1 shows a damped closing device, in which a guide part movably supporting the tilting slide on a body rail of the Pull-out guide of the pull-out furniture part is attached and the driver is integrated in a pull-out rail of the pull-out guide attached to the pull-out furniture part.

In most known closing devices, the driver is arranged on the pull-out rail attached to the pull-out furniture part and interacts with a spring-loaded pull-in part, in particular a tilting slide, which is movably mounted on the body rail. However, an inverted arrangement (driver on the body rail spring-loaded closing part on the pull-out rail) is also known.

Pull-out guides designed with self-retraction can only have the body rail and the pull-out rail or additionally (at least) one middle rail arranged between the pull-out rail and the body rail. In particular, the pull-out guide can be designed such that when the pull-out rail is pulled out, the middle rail moves along half the way of the pull-out rail. Such pull-out guides with a synchronously moving central rail are known, for example, as roller pull-out guides in a differential design. In the case of roller pull-out guides, the rollers used to move the rails are rotatably mounted on the rails about axes which are stationary with respect to them. Roller differential pull-out guides have a load-bearing differential roller which is rotatably mounted on the middle rail with vertical play, which rolls between the body rail and the pull-out rail and causes the rails to synchronize. For example, such pull-out guides go out of the AT 391 603 B and EP 1 360 914 A1 forth.

On the other hand, pull-out guides are known which have carriages equipped with balls or rollers for mutually displaceable mounting of the rails. Pull-out guides are also known, which have both rollers mounted on the rails and carriages with rolling elements arranged between the rails.

The overall length of the known retraction mechanisms, which have tilting slides, depends on the length of the desired retraction path, the stroke of the spring effecting the retraction corresponding to the retraction path. The spring rate must not be too high so that the pull-in force does not drop too much over the entire length of the pull-in. Sufficiently long springs must be used for this, the length of which is typically approximately twice as long as the required stroke.

If relatively large feed lengths are desired or required, this leads to correspondingly large lengths of the feed mechanisms. Especially with pull-out devices that are designed for relatively high loads, e.g. > 70 kg, relatively large feed lengths are required, preferably over 60 mm, e.g. of about 100mm in order to obtain sufficiently long braking distances, over which the kinetic energy of the pull-out furniture part can be reduced by the damper when it is pushed in with momentum. Such long feed lengths lead to problems of integrating the pull-in device into the pull-out guide.

To reduce the overall length, it is also known to deflect the feed spring by one or more rollers, but this increases the overall height or width of the feed mechanism accordingly.

It is also known to install conventional retraction mechanisms so that they do not cause the retractable furniture part to be retracted over the last part of the drive-in path, but rather to push the pull-out furniture part out over a last part of the drive-out path. Such a “self-extending device” can be useful, for example, in tall unit pull-outs that have a cabinet part that can be rotated about a vertical axis. It is advantageous here if the pull-out furniture part is brought into a maximally extended end position by the self-extension device in order to prevent an undesired collision with the furniture body when the cabinet part is rotated. In addition to the self-extracting device, there is also a self-pulling device. Two retraction mechanisms are thus installed independently of one another in order to achieve both the function of self-retraction (in the last section of retracting the extension guide) and the function of self-extension (in the last section of retraction of the extension guide).

A pull-out guide of the type mentioned is based on the WO 2010/066608 A1 forth. A guide part is arranged on the central rail, which guides first and second racks, which are coupled via a gearwheel. First and second drivers arranged on the first and second rails interact with the respective racks via respective coupling parts. When pulling out the pull-out guide starting from the insertion position of the rails, the drivers are first coupled to the coupling parts and move the racks from a respective basic position to a respective waiting position, in which the drivers uncouple from the coupling parts and in which the racks remain when the pull-out guides are pulled out further . When the pull-out guide is pushed in, the drivers couple back to the coupling parts, which triggers a self-retraction of the rails.

The object of the invention is to provide a pull-out guide with an advantageous displacement device, from which the rails are automatically shifted into the insertion position in a last section of the retracting of the pull-out guide and from which the rails are automatically shifted into the pull-out position in a last section of the extension of the pull-out guide , with the smallest possible overall length, the longest possible path is achieved, via which the rails are moved.

According to the invention, this is achieved by a pull-out guide with the features of claim 1.

A pull-out guide according to the invention has a guide part arranged on the central rail, of which a first and a second rack are slidably guided. The racks are over at least one gear coupled. A first coupling part is connected to the first rack, which cooperates with a first driver arranged on the first rail or a part connected to it, and a second coupling part is connected to the second rack, which connects to a part connected to the second rail or a part connected to it arranged second driver cooperates. When pulling out the pull-out guide starting from the insertion position of the rails, the first driver is coupled to the first coupling part and the second driver is coupled to the second coupling part and the first and second toothed racks are based on a respective basic position, which the first and second toothed racks in the Take the slide-in position of the rails, moved in opposite directions to a respective waiting position. They reach this in an intermediate position of the rails, in which the first driver decouples from the first coupling part and the second driver from the second coupling part. When the pull-out guide is pulled out further, the racks remain in their intermediate positions. When the pull-out guide is inserted, the first and second drivers are coupled to the first and second coupling parts when the intermediate position of the rails is reached.

The respective driver is preferably uncoupled and coupled to the respectively assigned coupling part by pivoting the respective coupling part and an axis perpendicular to the direction of extraction.

In a pull-out guide according to the invention, a certain way of moving the second rail to be attached to the pull-out furniture part relative to the first rail to be attached to the furniture body can be achieved by the sliding device with a substantially shorter stroke of a spring of the sliding device, in particular a stroke that is approximately half as large as in conventional pull-out guides. With an existing system-related installation space, a much larger feed path, in particular a feed path that is almost twice as large, can be realized.

In principle, instead of, or in addition to, a spring, a sloping ramp of a running track can be used, over which a load-transmitting roller of the pull-out guide rolls in a last section of the retracting of the pull-out guide until the rails are in the inserted position.

In an advantageous embodiment of the invention, a damper is also present which dampens the insertion of the second rail by the user or the insertion of the second rail by the sliding device in the last section of the retraction of the pull-out guide. Due to the design according to the invention, the length of the damper can be approximately half as long as compared to conventional designs.

When the pull-out guide is pulled out after the first and second drivers have been uncoupled from the first and second coupling parts, the first and second toothed racks are advantageously held in their waiting positions by abutment of a respective retaining element on a respective retaining surface that is stationary with respect to the central rail. When the pull-out guide is retracted, when the catches are coupled to the coupling elements, the pivoting of the coupling elements causes the retaining elements and retaining surfaces to be disengaged. The gear racks can only be shifted from their waiting positions to their basic positions when the retaining elements of both coupling parts are disengaged from the respective retaining surface ("AND function"). This can also result in a displacement of the second rail relative to the central rail if the rails should not be in their correct mutual positions when the intermediate position is reached when the pull-out guide is retracted.

Advantageously, the distance over which the second rail self-retracts can make up 5% to 25% of the total displacement of the second rail between the insertion position of the rails and the extended position of the rails.

According to the invention, it is further provided that at least one first additional driver is arranged on the first rail or a part connected to it, and at least one second additional driver is arranged on the second rail or part connected to it, when pulling out the pull-out guide when reaching an additional intermediate position, which lies further in the direction of the extended position of the rails than the intermediate position, couple the first additional driver to the second coupling part and the second additional driver to the first coupling part and furthermore a displacement of the first and second rack from their waiting positions into their basic positions, which occupy the first and second rack in the extended position of the rails. When inserting the pull-out guide starting from the pull-out position of the rails, the first and second racks become the first and second rack from their basic positions in opposite directions to theirs by coupling the first additional driver to the second coupling part and coupling the second additional driver respective waiting position shifted, which they reach in the additional intermediate position of the rails and in which the first additional driver decouple from the second coupling part and the second additional driver from the first coupling part.

According to the invention, both a retraction device which automatically moves the rails into the insertion position in the last section of the retraction of the pull-out guide and an extension device are designed by which the rails are automatically shifted into the pull-out position in a last section of the extension of the pull-out guide. This is brought about by a single displacement unit arranged on the central rail, which interacts with different carriers arranged on the first and second rails during self-retraction and self-extension.

Preferably, the distance over which the second rail extends itself 5% to 25% of the total displacement of the second rail between the insertion position of the rails and the extended position of the rails turn off.

• Fig. 1 und 2 ein nicht erfindungsgemäßes Ausführungsbeispiel einer Ausziehführung als Hintergrund der Erfindung, in der Einschubstellung und Ausziehstellung der Schienen, in Schrägsicht auf die dem ausziehbaren Möbelteil zugewandten Innenseiten der Schienen;
• Fig. 3 eine Schrägsicht der Mittelschiene allein;
• Fig. 4 eine Schrägsicht entsprechend Fig. 1 und 2 beim Einfahren der Ausziehführung im Zustand vor dem Ankoppeln der ersten und zweiten Mitnehmer an die ersten und zweiten Koppelteile;
• Fig. 5 ein vergrößertes Detail A von Fig. 4;
• Fig. 6 eine Darstellung entsprechend Fig. 4, wobei aber nur die Verschiebeeinheit und von den Schienen nur die Bereiche um die Mitnehmer dargestellt sind (der erste Mitnehmer ist hier nicht sichtbar);
• Fig. 7 eine Darstellung entsprechend Fig. 6, wobei von der Verschiebeeinheit aber nur die beweglichen Teile dargestellt sind;
• Fig. 8 einen vertikalen Teilschnitt im Bereich des zweiten Mitnehmers und des zweiten Koppelteils;
• Fig. 9, 10 und 11 Darstellungen entsprechend Fig. 5, 7 und 8 im weiter eingefahrenen Zustand der Ausziehführung, knapp vor dem Ankoppeln der Mitnehmer an die Koppelteile;
• Fig. 12, 13 und 14 Darstellungen entsprechend den Fig. 9, 10 und 11 im angekoppelten Zustand der Mitnehmer an die Koppelteile;
• Fig. 15 und 16 Darstellungen entsprechend den Fig. 12 und 13 in der Einschubstellung der Schienen;
• Fig. 17, 18 und 19 Darstellungen entsprechend den Fig. 5, 6 und 7 in der gleichen Stellung der Schienen, in einer Schrägsicht auf die Außenseite der Ausziehführung;
• Fig. 20 einen vertikalen Teilschnitt im Bereich des ersten Mitnehmers und ersten Koppelteils;
• Fig. 21, 22 und 23 Darstellungen entsprechend den Fig. 17, 19 und 20 knapp vor dem Ankoppeln der Mitnehmer an die Koppelteile;
• Fig. 24, 25 und 26 Darstellungen entsprechend den Fig. 21, 22 und 23 im angekoppelten Zustand der Mitnehmer an die Koppelteile;
• Fig. 27 und 28 Darstellungen entsprechend den Fig. 24 und 25 in der Einschubstellung der Schienen;
• Fig. 29 und 30 Vertikalschnitte durch die Verschiebeeinheit (die Schnittebene verläuft durch das Zahnrad) in der Einschubstellung und Ausziehstellung der Schienen;
• Fig. 31 und 32 Vertikalschnitte durch die Verschiebeeinheit in der Einschubstellung und Ausziehstellung der Schienen, wobei die Schnittebene in Fig. 31 durch die verschwenkbare Lagerung des ersten Koppelteils und in Fig. 32 durch die verschwenkbare Lagerung des zweiten Koppelteils verläuft;
• Fig. 33, 34 und 35 Explosionsdarstellungen aus unterschiedlichen Blickrichtungen;
• Fig. 36 eine Schrägsicht einer Ausziehführung gemäß einem Ausführungsbeispiel der Erfindung, in der Ausziehstellung der Schienen;
• Fig. 37 und 38 Schrägsichten der zweiten Schiene, ohne das U-förmige Tragprofil, aus verschiedenen Blickrichtungen;
• Fig. 39 und 40 Schrägsichten der Mittelschiene und der ersten Schiene;
• Fig. 41 und 42 Draufsichten auf die Ausziehführung in der Einschubstellung und in der Ausziehstellung der Schienen;
• Fig. 43 und 44 Schnitte entlang der Linien BB und CC von Fig. 41 und 42;
• Fig. 45 eine stirnseitige Ansicht der Ausziehführung;
• Fig. 46 eine stirnseitige Ansicht der Ausziehführung ohne die Verschiebeeinheit;
• Fig. 47 und 48 Schrägsichten der Verschiebeeinheit in der Ausziehstellung und Einschubstellung der Schienen;
• Fig. 49 und 50 die Verschiebeeinheit in den Stellungen entsprechend Fig. 47 und 48 horizontal aufgeschnitten dargestellt;
• Fig. 51 eine Explosionsdarstellung in der gleichen Blickrichtung;
• Fig. 52 eine Schrägsicht der Verschiebeeinheit aus einer anderen Blickrichtung;
• Fig. 53 eine Explosionsdarstellung in der gleichen Blickrichtung;
• Fig. 54 und 55 Draufsichten auf die Verschiebeeinheit in der Ausziehstellung und Einschubstellung der Schienen;
• Fig. 56 eine Seitenansicht der Ausziehführung in der Einschubstellung der Schienen;
• Fig. 57 einen Schnitt entlang der Linie DD von Fig. 56;
• Fig. 58 einen Schnitt entsprechend Fig. 57 in einem Zustand der Ausziehführung beim Ausfahren der Ausziehführung kurz nach dem Abkoppeln des ersten und zweiten Mitnehmers vom ersten und zweiten Koppelteil;
• Fig. 59 einen Schnitt entsprechend Fig. 57 in einem Zustand der Ausziehführung beim Ausfahren kurz vor dem Ankoppeln des ersten Zusatz-Mitnehmers an das zweite Koppelteil und des zweiten Zusatz-Mitnehmers an das erste Koppelteil;
• Fig. 60 einen Schnitt entsprechend Fig. 57 in der Ausziehstellung der Schienen;
• Fig. 61 eine Schrägsicht der Ausziehführung in der Ausziehstellung der Schienen, im Bereich der Verschiebeeinheit teilweise aufgeschnitten;

Die Figuren weisen unterschiedliche Maßstäbe auf.Further advantages and details of the invention are explained below with reference to the accompanying drawings. In this show:

• 1 and 2 a non-inventive embodiment of a pull-out guide as the background of the invention, in the insertion position and the pull-out position of the rails, in an oblique view of the inside of the rails facing the pull-out furniture part;
• Fig. 3 an oblique view of the middle rail alone;
• Fig. 4 an oblique view accordingly 1 and 2 when retracting the pull-out guide in the state before coupling the first and second drivers to the first and second coupling parts;
• Fig. 5 an enlarged detail A of Fig. 4 ;
• Fig. 6 a representation accordingly Fig. 4 , but only the displacement unit and only the areas around the carriers of the rails are shown (the first carrier is not visible here);
• Fig. 7 a representation accordingly Fig. 6 , but only the moving parts of the displacement unit are shown;
• Fig. 8 a vertical partial section in the region of the second driver and the second coupling part;
• 9, 10 and 11 Representations accordingly 5, 7 and 8 in the retracted state of the pull-out guide, just before coupling the drivers to the coupling parts;
• 12, 13 and 14 Representations according to the 9, 10 and 11 in the coupled state of the driver to the coupling parts;
• 15 and 16 Representations according to the 12 and 13 in the slide-in position of the rails;
• Fig. 17 , 18 and 19 Representations according to the 5, 6 and 7 in the same position of the rails, in an oblique view of the outside of the pull-out guide;
• Fig. 20 a vertical partial section in the region of the first driver and first coupling part;
• 21, 22 and 23 Representations according to the Fig. 17 , 19 and 20 just before coupling the drivers to the coupling parts;
• 24, 25 and 26 Representations according to the 21, 22 and 23 in the coupled state of the driver to the coupling parts;
• 27 and 28 Representations according to the 24 and 25 in the slide-in position of the rails;
• 29 and 30 Vertical cuts through the slide unit (the cutting plane runs through the gear wheel) in the slide-in and pull-out position of the rails;
• 31 and 32 Vertical sections through the sliding unit in the slide-in and pull-out position of the rails, the cutting plane in Fig. 31 due to the pivotable mounting of the first coupling part and in Fig. 32 runs through the pivotable mounting of the second coupling part;
• Fig. 33 , 34 and 35 Exploded views from different perspectives;
• Fig. 36 an oblique view of a pull-out guide according to an embodiment of the invention, in the extended position of the rails;
• Fig. 37 and 38 Oblique views of the second rail, without the U-shaped support profile, from different viewing directions;
• 39 and 40 Oblique views of the middle rail and the first rail;
• 41 and 42 Top views of the pull-out guide in the slide-in position and in the pull-out position of the rails;
• 43 and 44 Cuts along lines BB and CC from 41 and 42 ;
• Fig. 45 an end view of the pull-out guide;
• Fig. 46 an end view of the pull-out guide without the displacement unit;
• 47 and 48 Oblique views of the sliding unit in the extended position and the inserted position of the rails;
• 49 and 50 the displacement unit in the positions accordingly 47 and 48 shown cut horizontally;
• Fig. 51 an exploded view in the same direction;
• Fig. 52 an oblique view of the displacement unit from a different viewing direction;
• Fig. 53 an exploded view in the same direction;
• 54 and 55 Top views of the sliding unit in the extended position and Insertion position of the rails;
• Fig. 56 a side view of the pull-out guide in the inserted position of the rails;
• Fig. 57 a section along the line DD of Fig. 56 ;
• Fig. 58 a cut accordingly Fig. 57 in a state of the pull-out guide when extending the pull-out guide shortly after uncoupling the first and second driver from the first and second coupling parts;
• Fig. 59 a cut accordingly Fig. 57 in a state of the pull-out guide when extending shortly before the coupling of the first additional driver to the second coupling part and the second additional driver to the first coupling part;
• Fig. 60 a cut accordingly Fig. 57 in the extended position of the rails;
• Fig. 61 an oblique view of the pull-out guide in the extended position of the rails, partially cut open in the area of the displacement unit;

The figures have different scales.

An embodiment not falling under the invention is in the 1 to 35 shown. The pull-out guide comprises a first rail 1 to be fastened to a furniture body, a second rail 2 to be fastened to a pull-out furniture part and a middle rail 3 arranged between the first rail and the second rail.

In this exemplary embodiment, rails formed in mirror image are arranged on the opposite side of the pull-out furniture part (not shown in the figures).

Rollers 4-8, which are rotatably mounted on the central rail 3, serve for mutually displaceable mounting of the rails. In the middle area of the middle rail 3 there is a load-transmitting roller 5, which is rotatably mounted with vertical play, in the form of a so-called "differential roller", which rolls between an upward running track of the first rail 1 and a downward running track of the second rail 2.

In addition, between the upper horizontal web 2b of the second rail 2 and the a horizontal carriage 3 b of the middle rail 3, a carriage 9 is arranged. Instead, a roller could be rotatably mounted on the middle rail 3 in the area above the roller 5, as is known.

The first rail 1 has a profile with a C-shaped cross-sectional shape. The attachment to the furniture body is carried out on the vertical web 1a.

The second rail 2 has a profile with a Z-shaped cross-sectional shape, the pull-out furniture part being attached lying on the horizontal web 2a below.

The middle rail 3 has a C-shaped profile, the lower horizontal web 3a is provided with openings for the rollers 4, 5, 6 and 7 and the upper horizontal web 3b is provided with an opening for the roller 8.

Lateral guide rollers 10-13 are rotatably mounted on the middle rail.

The second rail 2 is based on the insertion position of the rails ( Fig. 1 ) extendable in an extraction direction 14 until it is in the Fig. 2 shown extended position of the rails is fully extended. The middle rail 3 moves synchronously when the second rail 2 is pulled out, in each case by half the distance covered by the second rail 2.

The design of the pull-out guide is basically known so far.

In the area of the front end of the center rail 3 with respect to the pull-out direction 14, a displacement unit 15 is arranged on the latter. This has a guide part 16 fixed to the profile of the central rail. The guide part 16 supports a first and a second rack 17, 18 displaceable parallel to the pull-out direction 14. The first and second toothed racks 17, 18 are via a toothed wheel 19, which meshes with their toothings and is rotatably mounted on the guide part 16 coupled. When one of the racks 17, 18 is shifted, the other of the racks 17, 18 is shifted equally far in the opposite direction.

On the second rack 18, one of the ends of a spring 20 (which is designed in the form of a helical spring) is fixed, such as from 29 and 30 can be seen. The other end of the spring 20 is held stationary with respect to the central rail. For this purpose, this other end of the spring 20 is attached to a connecting part 21 which is fastened to the profile of the central rail 3.

A first damper part 22a of a damper 22 is also connected to the second rack 18, cf. e.g. 31 and 33 . A second damper part 22b of the damper 22 is held stationary with respect to the center rail. For this purpose, the second damper part 22b is fastened to the connecting part 21.

The damper 22 is a piston-cylinder unit. The first damper part 22a can be the piston rod and the second damper part 22b can be the piston, or vice versa.

It is also conceivable and possible to use other dampers, for example a rotary damper, of which a pinion is driven by the second rack 18. A first coupling part 23 is connected to the first rack 17 and a second coupling part 24 is connected to the second rack 18. The first coupling part 23 is also displaced with the latter when the first rack 17 is displaced, and the second coupling part 24 is also displaced with the latter when the second rack 18 is displaced. The coupling parts 23, 24 can be pivoted relative to the respective rack 17, 18 to which they are connected, in each case about an axis 25, 26 which is at right angles to the direction of extraction 14. For this purpose, in the exemplary embodiment, a pivot pin 23c, 24c of the respective coupling part 23, 24 projects into a joint recess of the respective rack 17, 18. The axes 25, 26 are parallel to one another and are preferably aligned horizontally.

A driver 27, 28 is provided on the first rail 1 and on the second rail 2, the first driver 27 arranged on the first rail 1 with the first coupling part 23 and the second driver 28 arranged on the second rail 2 with the second Coupling part 24 interacts.

The first driver 27 arranged on the first rail 1 is formed by a projection (which could also be referred to as a "finger") projecting from the upper end of the vertical web 1a in the direction of the pull-out furniture part. The first driver 27 is arranged in the vicinity of the front end of the first rail 1 (less than 10% of the length of the first rail 1 from the front end of the first rail 1).

The second driver 28 is formed by a tab punched out of the upper horizontal web 2b of the second rail 2 and bent upwards. The second driver 28 is arranged in the vicinity of the front end of the second rail 2 (less than 10% of the length of the second rail 2 from the front end of the second rail 2).

A displacement device is formed by the displacement unit 15 in cooperation with the drivers 27, 28, from which the second rail 2 is automatically drawn in over a last section of the entry path, as will be explained below. This retraction takes place primarily by the force of the spring 20. In addition, the retraction is supported shortly before reaching the slide-in position of the rails by a ramp of the lower horizontal web of the first rail 1 falling against the extension direction 14, along which the differential roller 5 shortly before reaching the The slide-in position of the rails rolls off. In modified embodiments, the ramp could also be omitted.

In the extended position of the rails, the first and second racks 17, 18 are in waiting positions. In this they are held against the force of the spring 20. This takes place in that a first retaining element 23b of the first coupling part 23 with a first one arranged on the guide part 16 Retaining surface 16a and a second retaining element 24b of the second coupling part 24 cooperate with a second retaining surface 16b arranged on the guide part 16. The first retention surface 16a is opposite to the pull-out direction 14 and the second retention surface 16b is oriented in the extraction direction 14. The retaining elements 23b, 24b are each formed by a projection of the respective coupling part 23, 24.

The spring 20 acts on the second rack 18 (in the pull-out direction 14) and thus by coupling the racks 17, 18 via the gear 19 also the first rack 17 (counter to the pull-out direction 14). As a result, the spring 20 pulls the first retaining element 23b against the first retaining surface 16a and the second retaining element 24b against the second retaining surface 16b, as a result of which the toothed racks 17, 18 are blocked in their waiting positions.

The retraction of the pull-out guide starting from the pull-out position of the rails is explained below:
4 to 8 and FIGS. 17 to 21 show a state when the pull-out guide is retracted before the first and second drivers 27, 28 are coupled to the first and second coupling parts 23, 24, the racks 17, 18 being in their waiting positions.

In the state that in the 9 to 11 and 21 to 24 is shown, the second rail 2 is retracted a little further and the first and second drivers 27, 28 are already in the area of the coupling recesses 23a, 24a of the first and second coupling parts 23, 24.

The first driver 27 then runs against the front edge of the coupling recess 23a in relation to the pull-out direction 14, as a result of which the first coupling part 23 is pivoted about the axis 25, in the exemplary embodiment upwards. As a result, the first driver 27 is inserted into the coupling recess 23a of the first coupling part 23 and the first retaining element 23b is disengaged brought with the first retention surface 16a.

The second driver 28 runs against the rear edge of the coupling recess 24a, as a result of which the second coupling part 24 is pivoted about the axis 26, specifically downwards in the exemplary embodiment. As a result, the second driver 28 is inserted into the coupling recess 24a of the second coupling part 24 and the second retaining element 24b is brought out of engagement with the second retaining surface 16b.

This coupling of the drivers 27, 28 to the coupling parts 23, 24 takes place in a position of the rails, which is referred to in this document as the "intermediate position". This intermediate position is preferably at a distance of 5% to 25% of the total possible displacement path of the rails from the insertion position of the rails.

Only when both retaining elements 23b, 24b have come out of engagement with the respectively assigned retaining surface 16a, 16b can the spring 20 bring about the opposite displacement of the toothed racks 17, 18 from their waiting positions to their basic positions, thereby realizing an "AND function".

When the toothed racks 17, 18 are displaced by the spring 20, the coupling parts 23, 24 are taken along and as a result the first and second drivers 27, 28 are also taken along, i.e. the complete movement of the rails 1-3 and thus the complete retraction of the second rail 2 is effected until the racks 17, 18 assume their basic positions and the rails their insertion position.

If the rails are not in their correct mutual positions when the intermediate position is reached, a correction of the rail positions with a mutual displacement of the rails with friction can be achieved due to the described "AND function" due to an existing swing of the inserted furniture part. In practice, usually only one very small synchronization errors (typically <1mm) can be compensated. By compensating for such a synchronization error, a gap-free closing of the pull-out furniture part can subsequently be achieved.

In order to achieve a particularly gentle error correction, at least one of the toothed racks and / or the gearwheel in the area in which the tooth engagement takes place in the waiting position can optionally have an increased backlash which can continuously decrease away from this area (e.g. first tooth 0.5mm play, second tooth 0.4mm, etc., from fifth tooth 0.1mm).

When pulling out the pull-out guide from the insertion position of the rails, the process is reversed. The racks 17, 18 are shifted from their basic positions into their waiting positions by tensioning the spring 20. During the displacement of the toothed racks 17, 18 from their basic positions to their waiting positions, pivoting of the first and second coupling parts 23, 24 is blocked by their sliding abutment on contact surfaces 16c, 16d of the guide part 16. When the waiting positions of the toothed racks 17, 18 are reached, the pivoting of the first and second coupling parts 23, 24 is released and these are pivoted in the opposite manner to when the pull-out guide is retracted. As a result, on the one hand the retaining elements 23b, 24b of the coupling parts 23, 24 come into engagement with the retaining surfaces 16a, 16b of the guide part 16 and on the other hand the drivers 27a, 27b come out of engagement of the coupling recesses 23a, 24a of the first and second coupling parts 23, 24. In the further Extending the pull-out guide the drivers 27, 28 are thus decoupled from the coupling parts 23, 24 and the racks 17, 18 remain in their waiting positions.

The coupling parts 23, 24, which could also be referred to as tilting slides, can also be designed and / or guided in other ways. For example, the longitudinal guidance and tilting can also take place by means of a link guidance, as is basically the case with self-closing units which are arranged on the body-fixed rail and are also arranged on the extendable rail Cooperate with one another is known.

An embodiment of the invention is in the 36 to 61 shown. Parts analogous to the exemplary embodiment described above are identified by the same reference numerals.

A first difference to the exemplary embodiment described above is that this pull-out guide is arranged below the pull-out furniture part and can also be used individually or is used individually in practice. The pull-out guide in turn has a first rail 1 to be fastened to a furniture body, a second rail 2 to be fastened to a pull-out furniture part and a central rail 3 arranged between the first rail and the second rail. The rollers 4-7, 9 'used for mutually displaceable mounting of the rails are all rotatably mounted here on the central rail 3, the principle of the roller arrangement largely corresponding to that of the exemplary embodiment described above. In contrast to the exemplary embodiment described above, the rollers are "doubled" here, the center rail 3 having vertical webs 3c, 3d which are spaced from one another and which each have rollers 4-7, 9 'in a symmetrical arrangement. In addition, instead of the carriage 9 provided in the exemplary embodiment described above, a roller 9 'is rotatably mounted on the central rail 3 above a respective differential roller 5. In addition, behind the differential rollers 5 there are no additional support rollers, corresponding to the support rollers 8 of the previously described embodiment. An arrangement of such support rollers would in principle be possible.

• Die erste Schiene 1 weist eine nach oben offene C-Form auf.
• Die zweite Schiene 2 besitzt ein Basisprofil in Form eines U und dazu beidseitig abstehende Laufbahnabschnitte 2c, 2d. Am Basisprofil ist ein nach unten offenes U-förmiges Tragprofil 30 festgelegt, an welchem das ausziehbare Möbelteil, beispielsweise ein Ausziehrahmen angebracht wird. In Fig. 45 sind Abschnitte des Möbelkorpus 31 und des ausziehbaren Möbelteils 32 mit gestrichelten Linien angedeutet.

The profile shapes of the individual rails also differ from the exemplary embodiment described above:

• The first rail 1 has a C-shape that is open at the top.
• The second rail 2 has a base profile in the form of a U and on both sides protruding track sections 2c, 2d. A downwardly open U-shaped support profile 30 is fixed to the base profile, to which the pull-out furniture part, for example an extension frame, is attached. In Fig. 45 sections of the furniture body 31 and the pull-out furniture part 32 are indicated with dashed lines.

The two vertical webs 3c, 3d of the center rail 3 are parts of Z-shaped profiles which are held at a distance from one another by bolts 33.

The second rail 2 is based on the insertion position of the rails ( Fig. 41 ) extendable in a pull-out direction 14 until it is fully pulled out in the pull-out position of the rails (cf. for example Fig. 36 and 42 ). The middle rail 3 moves synchronously when the second rail 2 is pulled out, in each case by half the distance covered by the second rail 2.

The design of the pull-out guide is basically known so far.

A displacement unit 15 is arranged on the central rail 3 in a central region of the pull-out direction 14. This has a guide part 16 fixed to the profile of the central rail. The guide part 16 supports a first and a second rack 17, 18 displaceable parallel to the pull-out direction 14. The first and second toothed racks 17, 18 are coupled via a toothed wheel 19, which meshes with their toothings and is rotatably mounted on the guide part 16. When one of the racks 17, 18 is shifted, the other of the racks 17, 18 is shifted equally far in the opposite direction.

On the second rack 18, one end of springs 20 (which are in the form of coil springs) are fixed. For this purpose, the second rack 18 has fastening elements 18b (cf. Fig. 51 ). The other ends of the springs 20 are held against the central rail. In the exemplary embodiment, they are fastened to the guide part 16 by means of holding elements 16e, 16f (cf. for example Fig. 53 ). Instead of two springs 20, only one spring 20 could be provided, or more than two springs 20 could be provided.

The second rack 18 is further connected by means of a fastening element 18c (cf. Fig. 51 ) a first damper part 22a of a damper 22 is connected. A second damper part 22b of the damper 22 is held stationary with respect to the center rail. For this purpose, the second damper part 22b is fastened to the guide part 16 in the exemplary embodiment.

The damper 22 is a piston-cylinder unit, the first damper part 22a being the piston rod and the second damper part 22b being the piston, or vice versa. The use of other dampers is again conceivable and possible.

A first coupling part 23 is connected to the first rack 17, and a second coupling part 24 is connected to the second rack 18. The first coupling part 23 is also displaced with the first rack 17 when the latter is displaced, and the second coupling part 24 is also displaced with the latter when the second rack 18 is displaced. The coupling parts 23, 24 can be pivoted relative to the respective rack 17, 18 to which they are connected, in each case about an axis 25, 26 which is at right angles to the direction of extraction 14. The axes 25, 26 are parallel to one another and are preferably aligned vertically.

The first rail 1 has a first driver 27 and a first additional driver 34. A second driver 28 and a second additional driver 35 are arranged on the second rail 2. The first driver 27 and the second additional driver 35 cooperate with the first coupling part 23 when extending and retracting the pull-out guide. The second driver 28 and the first additional driver 34 cooperate with the second coupling part 24 when the pull-out guide is extended and retracted. This will be explained in more detail below.

The first driver 27 and the second additional driver 35 lie in one common plane, which is parallel to the axis 25 of the first coupling part 23. In relation to the direction of the axis 25, the first driver 27 and the second additional driver 35 are spaced here. When extending and retracting the pull-out guide, the first driver 27 and the second additional driver 35 can thus be guided past one another.

The second driver 28 and the second additional driver 34 lie in a common plane which is parallel to the axis 26 of the second coupling part 24, being spaced apart from one another in relation to the direction of the axis 25. When extending and retracting the pull-out guide, the second driver 28 and the first additional driver 34 can thus be guided past one another.

In the exemplary embodiment, the first driver 27 and the first additional driver 34 are formed by nub-like elevations which protrude upward from the first rail 1 (cf. Fig. 40 ). The second driver 28 and second additional driver 35 are formed by nub-like elevations which project downward from the second rail 2 (cf. Fig. 37 ).

A self-retracting device is formed by the displacement unit 15 in cooperation with the drivers 27, 28, from which the second rail 2 is automatically drawn into the insertion position of the rails over a last section of the entry path. A self-extension device is formed by the displacement unit 15 in cooperation with the additional drivers 34, 35, from which the second rail 2 is automatically extended into the extended position of the rails over a last section of the extension path. The automatic retraction and extension takes place primarily by the force of the at least one spring 20. In the case of self-retraction, the retraction shortly before reaching the insertion position of the rails is additionally effected by ramps 29 falling counter to the extension direction 14 (cf. in particular Fig. 43 ) supports the first rail 1, on which the rollers 5, 8 roll shortly before reaching the insertion position of the rails. These ramps 29 could also be omitted in modified embodiments of the invention.

In the extended position of the rails, the first and second racks 17, 18 are in waiting positions. In this they are held against the force of the at least one spring 20. This takes place in that a first retaining element 23b of the first coupling part 23 interacts with a first retaining surface 16a arranged on the guide part 16 and a second retaining element 24b of the second coupling part 24 interacts with a second retaining surface 16b arranged on the guide part 16. The first retention surface 16a is opposite to the pull-out direction and the second retention surface 16b is oriented in the extension direction 14.

In this exemplary embodiment, the retaining elements 23b, 24b are formed by pins which are guided in elongated holes 16g, 16h of the guide part 16. The elongated holes 16g, 16h each have a section parallel to the pull-out direction 14, which leads the retaining elements 23b, 24b parallel to the pull-out direction 14 when the toothed racks 17, 18 are shifted from their basic positions until shortly before they reach their waiting positions. There follows a curved section, through which the coupling parts 23, 24 are pivoted about the axes 25, 26 until the waiting positions of the racks 17, 18 are reached, these curved sections having the retaining surfaces 16a, 16b (cf. Fig. 55 ).

The at least one spring 20 acts on the second rack 18 (in the pull-out direction 14) and by coupling the racks 17, 18 via the gear 19 and thus also on the first rack 17 (counter to the pull-out direction 14). As a result, the spring 20 pulls the first retaining element 30 against the first retaining surface 32 and the second retaining element 31 against the second retaining surface 33, as a result of which the toothed racks 17, 18 are blocked in their waiting positions.

The extension of the pull-out guide starting from the insertion position of the rails is described below:
In the insertion position of the rails, the first driver 27 is coupled to the first coupling part 23 and the second driver 28 to the second coupling part 24, in that the respective driver 27, 28 is located in the coupling recess 23a, 24a of the respective coupling part 23, 24, cf. . Fig. 57 . When the second rail 2 is pulled out, the toothed racks 17, 18 are thereby shifted from their basic positions into their waiting positions, in which the first and second drivers 27, 28 decouple by moving out of the coupling recesses 23a, 24a by pivoting the coupling parts 23, 24 can. The drivers 27, 28 are uncoupled from the coupling parts 23, 24 in an intermediate position of the rails. This intermediate position is preferably at a distance of 5% to 25% of the total possible displacement of the rails from the insertion position of the rails.

When the second rail 2 is pulled out further, in an additional intermediate position of the rails, the second additional driver 35 arranged on the second rail 2 is coupled to the first coupling part 23 and the first additional driver 34 arranged on the first rail 1 is coupled the second coupling part 24, cf. Fig. 59 . This coupling takes place - completely analogous to the coupling of the first driver 27 to the first coupling part 23 and the second driver 28 to the second coupling part 24 in the intermediate position of the rails when the pull-out guide is retracted - in that the second additional driver 35 to the front The edge of the coupling recess 23a approaches and the first additional driver approaches the rear edge of the coupling recess 24a in an analogous manner. The coupling parts 23, 24 are thereby pivoted about the axes 25, 26, while the retaining elements 23b, 24b move along the elongated holes 16g, 16h, so that the additional drivers 34, 35 enter the coupling recesses 23a, 24a and the retaining elements 23b, 24b are thereby pulled off the retaining surfaces 16a, 16b. If both retaining elements 23b, 24b are out of engagement of the retaining surfaces 16a, 16b, the at least one spring 20 can pull the toothed racks 17, 18 in the direction of their basic positions until they are reached, the second rail 2 is pushed out until the rails are in the extended position, cf. Fig. 60 .

Only when both retaining elements 23b, 24b have come out of engagement with the respectively assigned retaining surface 16a, 16b can the spring 20 bring about the opposite displacement of the toothed racks 17, 18 from their waiting positions to their basic positions, thereby realizing an "AND function".

When inserting the second rail 2, the process takes place in the reverse manner. First, the additional drivers 34, 35 move the racks 17, 18 into their waiting positions, whereupon the additional drivers 34, 35 decouple from the coupling parts 23, 24 in the additional intermediate position of the rails. When the intermediate position of the rails is reached, the first and second drivers 27, 28 are coupled to the coupling parts 23, 24 and the racks 17, 18 are moved by the at least one spring 20 from their waiting positions to their basic positions, in which the insertion position of the rails is present.

The coupling parts 23, 24 could also be referred to as "tilting slides". Modified configurations of the coupling parts 23, 24, for example analogously to the first exemplary embodiment, are also conceivable and possible.

In principle, it would be conceivable and possible that the at least one spring 20 is omitted and the force by which the self-retraction and self-extension is effected is only caused by descending ramps via which rollers of the extension guide roll in the area of the self-retraction or self-extension. In order to block the toothed racks 17, 18 in their waiting positions after the drivers or additional drivers have been uncoupled from the coupling parts, the retaining elements can be held in engagement with the retaining surfaces by gravity and / or by (weak) auxiliary springs.

Different further modifications of the exemplary embodiments shown are conceivable and possible without leaving the scope of the invention defined in the claims.

The sliding guide of the rails can also be designed in a different way, for example only by carriages arranged between the rails. A differential running of the middle rail can also be formed, for example, by a non-load-transmitting driving roller arranged on the middle rail and rolling between a raceway of the first and second rails, the invention also being usable in principle with pull-out guides without synchronous running of the rails.

Instead of a straight toothed gear, a helical gear or a very helical gear in the form of a worm can also be used. Gears with two gear rings are also possible, one of which meshes with the first rack and the other with the second rack. The toothed racks can also be spaced apart in the horizontal direction, or - in the case of conical gear wheels - can also be arranged at any angle to one another.

In principle, there could also be more than one central rail.

The coupling parts could also be formed in one piece with the respective toothed rack 17, 18, wherein they can be pivoted relative to the toothed rack by a type of film hinge.

The spring and / or the damper could be attached to the second rack or to the first rack at another location. Both racks could also be connected to springs and / or dampers. Legend for the reference numbers: 1 first rail 16c first contact surface 1a Vertical web 16d second contact surface 2nd second rail 16e Holding element 2a Horizontal web 16f Holding element 2 B Horizontal web 16g Long hole 2c Career section 16h Long hole 2d Career section 17th first rack 3rd Middle rail 18th second rack 3a Horizontal web 18a Fastener 3b Horizontal web 18b Fastener 3c Vertical web 18c Fastener 3d Vertical web 19th gear 4th Roller 20th feather 5 Roller 21st Connecting part 6 Roller 22 damper 7 Roller 22a first damper part 8th Roller 22b second damper part 9 Carriage 23 first coupling part 9 ' Roller 23a Coupling recess 10th Cornering roller 23b Retention element 11 Cornering roller 23c Hinge pin 12 Cornering roller 24th second coupling part 13 Cornering roller 24a Coupling recess 14 Pull-out direction 24b Retention element 15 Displacement unit 24c Hinge pin 16 Guide part 25th axis 16a first retention area 26 axis 16b second retention area 27th first carrier 28 second driver 29 ramp 30th Support profile 31 Furniture body 32 extendable furniture part 33 bolt 34 first additional carrier 35 second additional carrier

Claims (9)

1. A pull-out guide for pulling a pull-out furniture part out of a furniture carcass, comprising

   - at least three rails, which comprise a carcass-side first rail (1), a pulling-out-side second rail (2) and a middle rail (3) arranged between the first and the second rail and which are guided displaceably relative to each other between a pushed-in position of the rails, in which the rails are completely pushed into one another, and a pulled-out position of the rails, in which the rails are completely pulled out from each other, and

   - a displacement device, by which the rails in a last portion of the retraction of the pull-out guide are automatically displaceable into the pushed-in position and which has a guide part (16) arranged on the middle rail, by which a first and a second toothed rack (17, 18) which are coupled by way of at least one gear wheel (19) are guided displaceably,

   wherein a first coupling part (23) is connected to the first toothed rack (17), which part cooperates with a first entraining means (27) arranged on the first rail (1) or a part connected thereto, and a second coupling part (24) is connected to the second toothed rack (18), which part cooperates with a second entraining means (28) arranged on the second rail (2) or a part connected thereto,
   wherein upon the pull-out guide being pulled out in a pulling-out direction (14) starting from the pushed-in position of the rails the first entraining means (27) is coupled to the first coupling part (23) and the second entraining means (28) is coupled to the second coupling part (24), and the first and second toothed rack (17, 18), starting from a respective basic position which the first and second toothed rack (17, 18) assume in the pushed-in position of the rails, are displaced in opposite directions into a respective waiting position which they reach in an intermediate position of the rails and in which the first entraining means (27) uncouples from the first coupling part (23) and the second entraining means (28) from the second coupling part (24) and in which the respective toothed rack (17, 18) remains upon the pull-out guide being pulled out further, and
   wherein upon the pull-out guide being pushed in upon the intermediate position of the rails being reached coupling of the first and second entraining means (27, 28) to the first and second coupling parts (23, 24) takes place,
   characterised in that furthermore at least a first additional entraining means (34) is arranged on the first rail (1) or a part connected thereto, and furthermore at least a second additional entraining means (35) is arranged on the second rail (2) or a part connected thereto,
   wherein upon the pull-out guide being pulled out upon an additional intermediate position which lies further in the direction of the pulled-out position of the rails than the intermediate position being reached, the first additional entraining means (34) couples to the second coupling part (24) and the second additional entraining means (35) to the first coupling part (23), and furthermore displacement of the first and second toothed racks (17, 18) takes place from their waiting positions into their basic positions which the first and second toothed rack (17, 18) assume in the pulled-out position of the rails, and wherein upon the pull-out guide being pushed in starting from the pulled-out position of the rails by the coupling of the first additional entraining means (34) to the second coupling part (24) and the coupling of the second additional entraining means (35) to the first coupling part (23) the first and second toothed rack (17, 18), starting from the basic position, are displaced in opposite directions into the respective waiting position which they reach in the additional intermediate position of the rails and in which the first additional entraining means (34) uncouples from the second coupling part (24) and the second additional entraining means (35) from the first coupling part (23).
2. A pull-out guide according to Claim 1, characterised in that the first and second coupling parts (23, 24) in the waiting position of the first and second toothed racks (17, 18) are pivoted relative to the basic position of the first and second toothed racks (17, 18) about parallel axes (25, 26) at right-angles to the pulling-out direction (14).
3. A pull-out guide according to Claim 1 or 2, characterised in that upon the pull-out guide being pulled out the displacement of the first and second toothed racks (17, 18) from their basic positions into their waiting positions takes place counter to the force of at least one spring (20).
4. A pull-out guide according to Claim 3, characterised in that one of the end regions of the spring (20) is connected to one of the toothed racks (17, 18) and the other end region of the spring (20) is held in stationary manner relative to the middle rail (3).
5. A pull-out guide according to one of Claims 1 to 4, characterised in that the first and second toothed racks (17, 18), upon the pull-out guide being pulled out after the first and second entraining means (27, 28) are uncoupled from the first and second coupling parts (23, 24), are held in their waiting positions by a respective retaining element (23b, 24b) lying against a respective retaining face (16a, 16b) which is stationary relative to the middle rail (3).
6. A pull-out guide according to Claim 5, characterised in that the first and second coupling parts (23, 24) have the retaining elements (23b, 24b).
7. A pull-out guide according to one of Claims 1 to 6, characterised in that the displacement of the toothed racks (17, 18) from their waiting positions into their basic positions is damped by at least one damper (22).
8. A pull-out guide according to Claim 7, characterised in that at least one of the toothed racks (17, 18) is connected to a first damper part (22a) of the damper (22), by which a second damper part (22b) is held in stationary manner relative to the middle rail (3).
9. A pull-out guide according to one of Claims 1 to 8, characterised in that at least one of the toothed racks (17, 18), relative to the gear wheel (19) with which the toothed rack (17, 18) meshes, has a tooth backlash which, in a region adjoining the point at which the toothed rack (17, 18) which is in its waiting position is engaged with the gear wheel (19), is greater than in a region adjoining the point at which the toothed rack (17, 18) which is in its basic position is engaged with the gear wheel (19).

Images