EP3745916B1 - Arrangement of sliding rails, railsynchronisationdevice and actuacting pin - Google Patents

Description

The invention relates to an arrangement of a pull-out guide that can be attached to a piece of furniture, the pull-out guide having a first rail and a second rail movably mounted on the first rail, a rail synchronizing device, the rail synchronizing device having a toothed rack connected to the first rail gear wheel meshing with the toothed rack and a bearing block connected to the second rail, the gear wheel being rotatably mounted in the bearing block, and a driver for a drawer drive device, the toothed rack of the rail synchronization device being connected to the driver. In addition, the invention relates to a piece of furniture with such an arrangement.

Rail synchronization devices are mostly used to synchronize the movement of two rail systems arranged opposite one another on a piece of furniture. This enables precise parallel guidance of a pull-out drawer. This parallel guidance relative to a piece of furniture is particularly advantageous when very narrow or very wide drawers are to be moved, the parallel guidance largely preventing the drawer from tilting at the side. Such systems are also known to a person skilled in the art as lateral stabilization systems. Examples of this go from the EP 1 036 526 A1 and the EP 2 515 710 B1 out.

Drawer drive devices, by means of which a drawer is ejected or retracted, have also been known for many years. Such drawer drive devices can act directly on the drawer. Usually, however, a so-called driver is assigned to the drawer or the furniture body, which is connected to the drawer drive device in intervention can be brought. An example of such a drive device is from WO 2015/192153 A1 out.

Other well-known pull-out guides go from the US 2011/0037362 A1 and the DE 20 2015 100 356 U1 out.

In the case of furniture that has lateral stabilization and a driver for a drawer drive device, the space requirement is relatively large due to the large number of components required. In addition, the installation can be quite complicated.

The object of the present invention is therefore to provide an arrangement which is improved over the prior art. In particular, the space requirement should be as small as possible. In addition, as few components and materials as possible should be used.

This is solved by an arrangement with the features of claim 1. Accordingly, the invention provides that the toothed rack has an elongate rack, preferably aligned in the longitudinal direction of the pull-out guide, and a first holding element, preferably made of plastic, with the rack resting (indirectly) on the driver via the first holding element. Thus, the toothed rack is no longer (only) connected to the first rail, but the existing driver is used as a connection option for the toothed rack of the rail synchronization device.

Preferred embodiments of the present invention are set out inter alia in the dependent claims.

A first embodiment with regard to the general arrangement of the components of the rail synchronization device provides that the first rail is in the form of a drawer rail that can be fastened to a drawer and the second rail is designed in the form of a carcass rail that can be fastened to a furniture carcass. In this case, the bearing block is assigned to the body rail and is thus fixed relative to the furniture body, whereas the toothed rack can be moved along with the drawer rail. In this embodiment variant, the driver is assigned to the drawer rail or directly to the drawer.

In an alternative, second embodiment with regard to the arrangement of the components of the rail synchronization device, mechanical reversal is provided. This is also shown in the figures described later. Accordingly, it is provided that the first rail is designed in the form of a cabinet rail that can be fastened to a furniture body and the second rail is designed in the form of a drawer rail that can be fastened to a drawer. In this embodiment variant, the driver is assigned to the carcass rail or directly to the furniture carcass.

For a drawer with a partial extension, it is sufficient if a rail system only has the first rail and the second rail. For a full extension of the drawer, a middle rail can also be provided, which is arranged between the first rail and the second rail.

In general, it can be provided that the arrangement has two pull-out guides (each having a first rail and a second rail) that can be fastened to opposite sides of a furniture body, as well as a rail synchronization device and a driver. Provision is preferably made for these components of the arrangement to be arranged and formed mirror-symmetrically to one another on both sides.

According to a preferred embodiment it is provided that the rail synchronization device is connected to the gear and has co-rotating synchronization rod. This synchronization bar connects and synchronizes the gears located on opposite sides of the furniture body.

For easy assembly, it is preferably provided that a guide groove for the toothed strip is formed in the first holding element.

In order to guarantee a connection that is as stable as possible, it is preferably provided that the toothed strip is fixed to the first holding element in the longitudinal direction. For this purpose, for example, a fixing projection can be formed on the first holding element.

For an even safer assembly, it is preferably provided that the toothed rack has a second holding element, preferably made of plastic. In addition, it can preferably be provided that the toothed strip is (indirectly) connected to the first rail via the second holding element. This second holding element is preferably designed in such a way that it can be pushed into the profile of the first rail. Provision is preferably made for the toothed strip to be guided in a longitudinally displaceable manner on the second holding element. This avoids tension or bulging.

For simple assembly, it is preferably provided that the bearing block is releasably connected to the second rail via a preferably lever-shaped locking element. The connection can be made, for example, by clamping, wedging or by snapping.

The driver should be designed in such a way that it can be brought into engagement with the drawer drive device. For simple production and assembly, it is preferably provided that the driver has a driver plate that can be connected to the first rail and a driver pin that is arranged on the driver plate. Alternatively, the carrier plate can also be connected directly to the furniture body or - in the case of mechanical reversal - directly to the drawer.

For a good hold of the toothed rack, it is preferably provided that the toothed rack rests on the driver plate of the driver, preferably indirectly via the first holding element.

A drawer drive device does not necessarily have to be present in the scope of delivery of the arrangement according to the invention. However, the driver is already part of the arrangement, even if it is not actually required when installed. This connection of the pull-out guide with the driver is also present, above all, to reduce the storage costs if ultimately no drawer drive device is used at all. But there is always a driver part of the arrangement in order to have a low storage cost by fewer different variants are in stock.

It is preferably provided that the arrangement also has a drawer drive device which can be brought into engagement with the driver, preferably with its driver pin.

Provision is particularly preferably made for two drawer drive devices to be arranged on opposite sides of the furniture body. For this purpose, provision can preferably be made for these two drawer drive devices to be able to be synchronized by a drive device synchronizing device which is separate from the rail synchronizing device.

Depending on the variant, the drawer drive device can be assigned to the drawer or the furniture body. Accordingly, the driver is assigned to the counterpart in each case.

According to a preferred exemplary embodiment, it is provided that the drawer drive device is connected to the second rail, preferably detachably.

Provision is also preferably made for the drawer drive device to be designed as an ejection device for ejecting the drawer from a closed position into an open position. Alternatively, it can also be provided that the drawer drive device is designed as a, preferably damped, retraction device for retracting the drawer from an open position into the closed position.

Furthermore, it can preferably be provided that the ejection device has a carrier, preferably fastened to the second rail, an ejection element that can be moved relative to the carrier, and an ejection force accumulator attached to the carrier on the one hand and to the ejection element on the other.

For simple triggering of the ejection device, it is preferably provided that the ejection device has a locking device that can be unlocked by pushing the drawer in the closing direction. The locking device has, for example, a locking path in the shape of a heart with a latching depression, in which the ejection element can be locked via a control pin.

Protection is also sought for a piece of furniture with a furniture body, at least one drawer and an arrangement according to the invention.

Fig. 1

eine perspektivische Darstellung eines Möbel mit Schubladen und einer Ausziehführung samt Schienen-Synchronisierungsvorrichtung,

Fig. 2

perspektivisch eine Explosionsdarstellung einer Anordnung aus Schienen-Synchronisierungsvorrichtung, Ausziehführung, Mitnehmer und Schubladen-Antriebsvorrichtung,

Fig. 3

die Anordnung gemäß Fig. 2 in zusammengebauten Zustand,

Fig. 4 - 16

den Montageablauf der Anordnung in verschiedenen perspektivischen Darstellung samt Details und

Fig. 17

die Schienen-Synchronisierungsvorrichtung in einer perspektivischen Darstellung.

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

1

a perspective view of a piece of furniture with drawers and a pull-out guide including rail synchronization device,

2

Perspectively an exploded view of an arrangement of rail synchronization device, pull-out guide, driver and drawer drive device,

3

the arrangement according to 2 in assembled condition,

Figures 4 - 16

the assembly process of the arrangement in different perspective views including details and

17

the rail synchronization device in a perspective view.

1 shows a perspective view of a piece of furniture 10 with a cabinet-like furniture body 11, with drawers 12 being mounted so as to be movable relative to the furniture body 11 via pull-out guides 3 (can also be referred to as rail systems). The two drawers 12 shown below are each in a closed position SS. In the case of the upper drawer 12 (not shown), the second rails 2 (drawer rails) of the pull-out guides 3 are each in an extended state, which would correspond to an open position OS of the drawer 12. There is a pull-out guide 3 on each side of the drawer 12, with the two pull-out guides 3 being fastened to opposite side walls of the furniture body 11. A synchronization rod 44 running transversely to the longitudinal direction L of the pull-out guide 3 can be seen. This is preferably designed in the form of a torsion shaft. The movements of the two pull-out guides 3 relative to one another can be synchronized by the synchronization rod 44, as a result of which precise parallel guidance of the drawer 12 relative to the furniture body 11 can also be brought about. The two pull-out guides 3 each have a (preferably metallic) first rail 1 (body rail) to be fastened to the furniture carcass 11 and at least one (preferably metallic) second rail 2 (loader rail) on. The purpose of the synchronization rod 44 is to synchronize the movement of the left and right drawer rails relative to one another, so that the drawer 12 can be pulled out of the furniture body 11 and pushed into the furniture body 12 without tilting to the side. The synchronization rod 44 is rotatably mounted in a bearing block 43 on both sides. The bearing block 43 is connected to the second rail 2, preferably detachably. The synchronization rod 44 is provided at each of the end regions with a gear wheel 42 which meshes with a toothed rack 41 . It is of course also possible in mechanical reversal to mount the toothed rack 41 on the drawer 12 or on the second rail 2 and the associated gear wheel 42 together with the bearing block 43 and synchronization rod 44 on the first rail 1 or on the furniture body 11 . The rack 41, the gear 42, the bearing block 43 and the synchronization rod 44 together form the rail synchronization device 4.

In 2 an arrangement 100 is shown in a perspective exploded view. This arrangement 100 consists of the rail synchronization device 4, the pull-out guide 3 and the driver 5 together. In this case, the arrangement 100 also has a drawer drive device 6 . The rail synchronization device 4 has the synchronization rod 44, the bearing block 43, the gear wheel 42 and the toothed rack 41, which is only partially shown. In addition, the locking element 49 movably mounted on the bearing block 43 can be seen. Furthermore, the second holding element 48 is clearly visible. The pull-out guide 3 consists of the first rail 1 and the second rail 2 . The driver 5 has a preferably metallic driver plate 51 and the driver pin 52 . The driving pin 52 can be formed in one piece with the driving plate 51 . It is preferably provided that the driver pin 52 is part of a plug-on part, preferably made of plastic, which is connected to the driver plate 51 . From the drawer drive device 6 - which is designed as an ejection device in this case - is mainly the carrier 61 can be seen. In addition, this drawer drive device 6 has a synchronization rod 62 that is separate from the rail synchronization device 4 .

In 3 the arrangement 100 is shown in the assembled state. The rail synchronization device 4 is fastened via the bearing block 43 in the rear area of the second rail 2 . The gear 42 meshes with the (not yet cut to length) toothed rack 42. The drawer drive device 6 is connected via the carrier 61 to the pull-out guide 3 (in particular to a container rail of the second rail 2), preferably releasably.

A possible assembly sequence of the arrangement 100 is shown step by step in the following figures.

In 4 It can be seen first of all that the first rail 1 has two angular mounting elements 7 and the rail-shaped guide part 8 . These elements are connected to each other, preferably welded or riveted. The second rail 2 is movably mounted on the guide part 8 of the first rail 1 via rollers (not shown). The carrier plate 51 is still at a distance from the pull-out guide 3.

In figure 5 the guide element 53 of the driver 5 is pushed into the recess 9 formed in the first rail 1 . In addition, it can be seen that the push-on part having the driver pin 52 is fastened to the driver plate 51 .

6 shows the position after the driver 5 has been pivoted relative to the pull-out guide 3. As a result, the driver 5 is attached to the first rail 1 of the pull-out guide 3, preferably by clamping.

In 7 is the 6 shown from above. The driver pin 52 of the driver 5 is clearly visible.

In 8 the first holding element 46 of the rail synchronization device 4, which is preferably made of plastic, is also shown.

9 shows the position when the first holding element 46 is fastened in the region of the driver 5 to the first rail 1 and the driver 5, preferably snapped in or clipped. As a result, the first holding element 46 rests directly on the driver 5 .

In 10 the second holding element 48 is also shown. In this position, this second holding element 48 encompasses the second rail 2. In the detail shown at the bottom left, this second holding element 48 is shown obliquely from below.

According to 11 the second holding element 48 was displaced in the longitudinal direction L counter to the closing direction SR. As a result, the second holding element 48 encompasses the second rail 2 on the one hand and is held, preferably snapped in, on the other hand at the end region of the first rail 1 . This is also illustrated in detail at the bottom left in a representation from diagonally below.

In 12 the bearing block 43 is attached to the rear area of the pull-out guide 3. The locking element 49 is still in a released position (as can also be seen in detail at the bottom left).

According to 13 the locking element 49 was pivoted. As a result, the bearing block 43 of the rail synchronization device 4 is firmly connected to the second rail 1, preferably clamped to it. This is also clearly visible in the detail on the bottom left, whereby the synchronization rod 44 and the (non-rotatable with the synchronization rod connected) gear 42 are shown relatively large. The lateral guide recesses 40 in the lower area of the bearing block 43 are also clearly visible in this detail.

According to 14 the rack 45 of the toothed rack 41 was pushed into the bearing block 43 via the guide recesses 40. As a result, the individual teeth of the toothed strip 45 mesh with the gear wheel 42. The toothed strip 45 also already contacts corresponding guide depressions in the second holding element 48.

In 15 the rack 45 is fully pushed in and also rests on the first holding element 46 . In 15 the arrangement 100 is thus shown in the assembled state. The toothed strip 45 forms the toothed rack 41 together with the first holding element 46. In this position, the toothed rack 41 of the rail synchronization device 4 is connected to the driver 5. The toothed rack 41 preferably rests on the driver plate 51 of the driver 5 . As a result, relatively complicated connections between the rack 41 and the pull-out guide 3 do not have to be created, but the driver 5 that is present in any case is used to enable simple assembly of the rack 41 of the rail synchronization device 4 . Thus, the driver 5—if the arrangement 100 also has a drawer drive device 6—has a dual function.

In 16 and the associated details, it can also be seen that the toothed strip 45 is guided in a longitudinally displaceable manner in the area of the second holding element 48 (see detail above right), while the toothed strip 45 is fixed on the first holding element 46 of the toothed rack 41 against movement in the longitudinal direction L (see detail bottom left). In particular, a latching groove 13 is formed in the toothed strip 45 and a corresponding latching projection 14 is formed in the first holding element 46 . If necessary, this could also be embodied vice versa.

In 17 Finally, the rail synchronization device 4 is shown without the pull-out guide 3. The toothed racks 41 and bearing blocks 43 arranged on both sides as well as the synchronization rod 44 are shown. This rail synchronization device 4 enables the second rails 2 (tray rails) to be guided in parallel by two pull-out guides 3 . This is also often referred to as lateral stabilization.

Reference list:

1

first rail

2

second rail

3

pull-out guide

4

rail synchronization device

5

driver

6

Drawer drive device

7

mounting elements

8th

guide part

9

recess

10

Furniture

11

furniture body

12

drawer

13

snap-in groove

14

snap-in protrusion

40

Leadership Deepening

41

rack

42

gear

43

bearing block

44

sync bar

45

toothed strip

46

first holding element

47

guide groove

48

second holding element

49

locking element

51

carrier plate

52

driving pin

53

guide element

61

carrier

62

sync bar

100

arrangement

L

longitudinal direction

ss

closed position

OS

open position

SR

closing direction

Claims (15)

1. An arrangement (100) comprising

   - an extension guide (3) that can be fastened to an item of furniture (10), wherein the extension guide (3) comprises a first rail (1) and a second rail (2) that is movably mounted on the first rail (1),

   - a rail synchronization device (4), wherein the rail synchronization device (4) comprises a toothed rack (41) connected to the first rail (1), a toothed wheel (42) meshing with the toothed rack (41) and a bearing block (43) connected to the second rail (2), wherein the toothed wheel (42) is rotatably mounted in the bearing block (43), and

   - an entrainment member (5) for a drawer drive device (6),

   wherein the toothed rack (41) of the rail synchronization device (4) is connected to the entrainment member (5), characterized in that the toothed rack (41) comprises an elongated toothed bar (45) and a first holding element (46), wherein the toothed bar (45) rests on the entrainment member (5) by means of the first holding element (46).
2. The arrangement according to claim 1, characterized in that the first rail (1) is formed as a carcass rail that can be fastened to a furniture carcass (11) and the second rail (2) is formed as a drawer rail that can be fastened to a drawer (12).
3. The arrangement according to claim 1 or 2, characterized in that the rail synchronization device (4) comprises a synchronization rod (44) which is connected to the toothed wheel (42) and which is rotating together with the toothed wheel (42).
4. The arrangement according to one of the claims 1 to 3, characterized in that the first holding element (46) is made of plastic.
5. The arrangement according to claim 4, characterized in that a guiding groove (47) for the toothed bar (45) is formed in the holding element (46).
6. The arrangement according to claim 4 or 5, characterized in that the toothed bar (45) is fixed to the first holding element (46) in longitudinal direction (L).
7. The arrangement according to the claims 4 to 6, characterized in that the toothed rack (41) comprises a second holding element (48), preferably made of plastic, wherein the toothed bar (45) is connected to the first rail (1) by means of the second holding element (48).
8. The arrangement according to one of the claims 1 to 7, characterized in that the bearing block (43) is detachably mounted to the second rail (2) by means of a, preferably lever-formed, locking element (49).
9. The arrangement according to one of the claims 1 to 8, characterized in that the entrainment member (5) comprises an entrainment plate (51) which can be connected to the first rail (1) and an entrainment pin (52) which is arranged on the entrainment plate (51).
10. The arrangement according to one of the claims 1 to 9, characterized by a drawer drive device (6) which can be engaged with the entrainment member (5), preferably with its entrainment pin (52).
11. The arrangement according to claim 10, characterized in that the drawer drive device (6) is, preferably detachably, connected with the second rail (2) .
12. The arrangement according to claim 10 or 11, characterized in that the drawer drive device (6) is formed as an ejection device for ejecting the drawer (12) from a closed position (SS) into an open position (OS) .
13. The arrangement according to claim 12, characterized in that the ejection device comprises a locking device which can be unlocked by over-pressing the drawer (12) in closing direction (SR).
14. The arrangement according to claim 12 or 13, characterized in that the ejection device comprises a carrier (61), preferably fastened to the second rail (2), an ejection element which is movable relative to the carrier (61) and an ejection force storage member which on the one hand is attached to the carrier (61) and on the other hand is attached to the ejection element.
15. An item of furniture (10) comprising a furniture carcass (11), at least one drawer (12) and an arrangement (100) according to one of the claims 1 to 14.

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