EP4162838B1 - Drawer pull-out guide - Google Patents

Description

• eine erste Führungsschiene und wenigstens eine zweite Führungsschiene, welche relativ zueinander verschiebbar gelagert sind,
• wenigstens ein an einer ersten Führungsschiene angeordnetes Abstützelement zum zumindest zeitweisen Abstützen an der zweiten Führungsschiene,
• wobei die Lage des wenigstens einen Abstützelementes relativ zur zweiten Führungsschiene durch eine Einstellvorrichtung einstellbar und nach erfolgter Einstellung relativ zur ersten Führungsschiene feststellbar ist.

The present invention relates to a method for mounting a support element on a drawer pull-out guide, wherein the drawer pull-out guide comprises:

• a first guide rail and at least one second guide rail, which are mounted so as to be displaceable relative to one another,
• at least one support element arranged on a first guide rail for at least temporary support on the second guide rail,
• wherein the position of the at least one support element relative to the second guide rail can be adjusted by an adjustment device and can be locked relative to the first guide rail after adjustment.

Drawer extension guides according to the preamble of claim 1 are in the US 1 849 809 A , in the DE 20 2010 009 163 U1 , in the EN 28 09 930 A1 , in the EN 30 15 351 A1 and in the EN 20 2012 010 757 U1 shown.

Drawer extension guides usually have a first guide rail (body rail) to be attached to a furniture body and at least one second guide rail (drawer rail) that is mounted so that it can be moved relative to the first guide rail. To achieve full extension of the drawer relative to a furniture body, an additional third guide rail (middle rail) can optionally be provided, which is located between the first and second guide rails are slidably mounted.

To reduce tilting play between the guide rails, at least one support element, for example in the form of a rotatable support roller, is usually attached to a first guide rail, so that the second guide rail can be supported on the support element of the first guide rail. This support element is particularly advantageous if at least one carriage with load-transferring rolling elements is slidably mounted between the guide rails. This carriage acts as a pivot bearing between the guide rails, with the guide rail to be supported being tiltably mounted about an axis formed by the carriage as a kind of double-armed lever. If the front end area of the guide rail to be supported is loaded (in particular by a heavy front panel of the drawer), the front end area of the guide rail is lowered, while the rear end area of the guide rail is raised by the pivot bearing formed by the carriage.

Due to component tolerances of the guide rails and/or the support element, the precise arrangement of the support element in the manufacture of the drawer pull-out guide is associated with some challenges. If the play between the support element and the guide rail to be supported on it is too small, the friction is increased and in an extreme case can lead to jamming between the support element and the guide rail. If the play is too large, however, dimensioned, the guide rails can tilt relative to each other beyond a tolerable level when the drawer pull-out guide is in the open position. This can ultimately lead to the front end area of the drawer sinking downwards when assembled, which gives the drawer pull-out guide an inferior impression.

The object of the present invention is to provide a method for mounting a support element on a drawer pull-out guide of the type mentioned at the outset while avoiding the disadvantages discussed above. This is achieved according to the invention by the features of patent claim 1. Further advantageous embodiments of the invention are defined in the dependent claims. According to the invention, it is provided that the at least one support element can be adjusted in a height direction by the adjustment device in the mounting position of the drawer pull-out guide.

Thus, an adjustment device is provided for adjusting the play between the support element and the guide rail to be supported thereon, so that the support element can be positioned in a predetermined position relative to the second guide rail and can be locked relative to the first guide rail.

The guide rails can be moved relative to one another between a closed position and an open position, wherein the at least one support element has a clearance to the second guide rail at least in the closed position. and the play can be adjusted using the adjustment device. The drawer pull-out guide is in the closed position when the guide rails essentially completely overlap.

According to one embodiment, it can be provided that the play in the open position of the guide rails is smaller than in the closed position and/or that the at least one support element rests against the second guide rail without play in the open position of the guide rails.

According to the invention, the adjustment is carried out in such a way that the support element is first brought to a stop with the guide rail to be supported in a first direction of movement (reference value with play equal to zero), then the support element is moved back again in a second direction of movement opposite to the first direction of movement by a predetermined amount (for example 0.1 mm) so that the support element is positioned with a predetermined play relative to the guide rail to be supported. Alternatively, the adjustment can also be carried out by measuring. The at least one support element is arranged in a fixed position relative to the first guide rail during normal operation of the drawer pull-out guide (i.e. when the guide rails move relative to one another).

There are several options for fixing the position of the support element after adjustment. Either the adjustment device is designed to be sufficiently self-locking so that the position of the Support element always remains in the pre-set position. Alternatively or additionally, it can be provided that the position of the at least one support element can be locked by a securing element, preferably releasably, after adjustment and/or that the position of the at least one support element can be locked permanently after adjustment, preferably by welding, gluing or by wobbling.

The support element can be movably mounted along a guide to adjust the play, wherein the support element can be fixed in a force-locking manner (for example by means of a clamping screw) relative to the first guide rail after adjustment along the guide.

Alternatively, it can be provided that the adjustment device has at least one movably mounted adjustment element, wherein the position of the at least one support element can be adjusted by actuating the adjustment element. The adjustment element can, for example, be rotatably mounted, wherein the position of the support element can be adjusted by rotating the adjustment element. For this purpose, the adjustment element can have a receiving device for a tool, preferably a screwdriver, wherein the position of the support element can be adjusted by rotating the receiving device using the tool.

The adjusting element can have a rotatably mounted eccentric or a rotatably mounted worm wheel. The worm wheel can, as already known, be equipped with a be provided with a spiral guideway, wherein a toothing connected to the support element engages in the spiral guideway of the worm wheel.

According to one embodiment, it can be provided that the second guide rail has a side web and a cross web connected to the side web, wherein the at least one support element can be supported on an underside of the cross web of the second guide rail in the assembly position of the drawer pull-out guide. In addition, the support element can be displaced along the cross web of the second guide rail when the guide rails move relative to one another. The cross web of the second guide rail can be flat over its entire length.

The support element can be designed, for example, as a rotatably mounted support roller. The support roller can be mounted so that it can rotate around a horizontal axis in an assembly position of the drawer pull-out guide on the furniture body. Instead of a support roller, an adjustable bearing block can also be provided to support the second guide rail.

According to a further embodiment, it can be provided that the at least one support element is arranged at the rear end region of the first guide rail.

• Anbringen des Abstützelementes an der ersten Führungsschiene der Schubladenausziehführung,
• Einstellen des Abstützelementes in einer vorbestimmten Lage relativ zur zweiten Führungsschiene mittels der Einstellvorrichtung, und
• Feststellen des Abstützelementes relativ zur ersten Führungsschiene.

The method according to the invention for mounting a support element on a drawer pull-out guide is characterized by the following steps:

• Attaching the support element to the first guide rail of the drawer pull-out guide,
• Adjusting the support element in a predetermined position relative to the second guide rail by means of the adjusting device, and
• Fixing the support element relative to the first guide rail.

When carrying out the method, the invention provides that the support element is moved in a first direction of movement for setting the predetermined position until the support element strikes the second guide rail and is moved back in a second direction of movement opposite to the first direction of movement until the predetermined position is reached.

Fig. 1

zeigt eine perspektivische Darstellung eines Möbels mit einem Möbelkorpus und relativ dazu verfahrbar gelagerten Schubladen,

Fig. 2a, 2b

zeigen die Schubladenausziehführung in einem perspektivischen Querschnitt sowie eine vergrößerte Detaildarstellung hierzu,

Fig. 3a-3c

zeigen die Schubladenausziehführung in einem perspektivischen Querschnitt sowie zwei Detaildarstellungen mit unterschiedlicher Höhenlage des Abstützelementes,

Fig. 4a, 4b

zeigen den hinteren Endbereich der Schubladenausziehführung in einer Explosionsansicht sowie eine vergrößerte Detaildarstellung hierzu,

Fig. 5a-5c

zeigen ein Beispiel mit mehreren in Höhenrichtung voneinander beabstandeten Öffnungen zur Lagerung des Abstützelementes,

Fig. 6a-6c

zeigen ein Beispiel mit einem drehbar gelagerten Schneckenrad zur Einstellung des Spiels zwischen dem Abstützelement und der zweiten Führungsschiene.

Further details and advantages of the present invention will become apparent from the following description of the figures:

Fig.1

shows a perspective view of a piece of furniture with a furniture body and drawers that can be moved relative to it,

Fig. 2a, 2b

show the drawer pull-out guide in a perspective cross-section as well as an enlarged detailed view,

Fig. 3a-3c

show the drawer pull-out guide in a perspective cross-section as well as two detailed views with different heights of the support element,

Fig. 4a, 4b

show the rear end area of the drawer slide in a Exploded view and an enlarged detailed view,

Fig. 5a-5c

show an example with several openings spaced apart in height for mounting the support element,

Fig. 6a-6c

show an example with a rotatably mounted worm wheel for adjusting the clearance between the support element and the second guide rail.

Fig.1 shows a piece of furniture 1 with a cupboard-shaped furniture body 2, wherein drawers 3 are mounted so as to be movable relative to the furniture body 2 via drawer pull-out guides 4. The drawers 3 have a front panel 5, a drawer base 6, drawer side walls 7 and a rear wall 8. The drawer pull-out guides 4 comprise at least two guide rails 10, 11, 12 which can be moved relative to one another. In the exemplary embodiment shown, a first guide rail 10 (drawer rail) is connected or to be connected to the drawer side wall 7, a second guide rail 11 (middle rail) is mounted so as to be movable between the first guide rail 10 and a third guide rail 12 (body rail) to be fastened to the furniture body 2. The third guide rail 12 has fastening sections 9a and 9b, by means of which the drawer pull-out guide 4 can be mounted on the furniture body 2.

Fig. 2a shows the drawer pull-out guide 4 in a perspective section. At the rear end of the first A hook 13 is arranged on the guide rail 10, which, when the drawer 3 is mounted on the drawer extension guide 4, engages in a corresponding recess in the rear wall 8 or the drawer side wall 7 and thus stabilizes the rear end area of the drawer 3 in a direction running transversely to the longitudinal direction (L). Between the first and second guide rails 10, 11, a first carriage 18 (not visible here) is arranged ( Fig. 3c ) with load-transmitting rolling elements 18a, whereby a movement of the first carriage 18 is coordinated with a movement of a second carriage 19 ( Fig. 3a ) which is slidably mounted between the third guide rail 12 (body rail) and the second guide rail 11 (middle rail). The gear 15 meshes on the one hand with a first rack of the first carriage 18, and on the other hand with a second rack 14 of the second carriage 19. At least one support element 17 for supporting the second guide rail 11 is arranged at the rear end region of the first guide rail 10. To adjust the position of the support element 17, an adjustment device 16 with a movably mounted adjustment element 16a is provided, wherein the position of the support element 17 can be adjusted by actuating the adjustment element 16a. The second guide rail 11 has a side web 11a and a cross web 11b connected to the side web 11a, wherein the support element 17 can be supported on an underside of the cross web 11b of the second guide rail 11. The support element 17 is shown in the figure as a support roller which is preferably rotatably mounted about an axis running horizontally in the assembly position.

Fig. 2b shows the Fig. 2a circled area in an enlarged view, where the clearance (X) between the support element 17 and the crosspiece 11b of the second guide rail 11 can be seen. In the shown Figure 2b the play (X) is too large, so that the second guide rail 11 can be tilted excessively about a horizontal axis running transversely to the longitudinal direction (L). By rotating the adjusting element 16a of the adjusting device 16, the play (X) can be set to a predetermined value. To do this, the adjusting element 16a is rotated in a first direction of rotation until the support element 17 contacts the underside of the crosspiece 11b (play equals zero), then the adjusting element 16a is rotated in a second direction of rotation opposite to the first direction of rotation until the play (X) has a predetermined value. This can be done automatically in the factory by an assembly robot. After the play (X) has been adjusted, the support element 17 is fixed in its position, for example welded, glued or twisted.

Fig. 3a shows the drawer pull-out guide 4 in a perspective cross-section, wherein between the first guide rail 10 and the second guide rail 11 at least one first carriage 18 with load-transferring rolling elements 18a is slidably mounted. Between the third guide rail 12 and the second guide rail 11 at least one second carriage 19 with load-transferring rolling elements 19a is also slidably mounted. The crosspiece 11b of the second guide rail 11 can be in the Essentially extend over the entire length of the second guide rail 11.

Fig. 3b shows the Fig. 3a circled area in an enlarged view. The support element 17 was positioned according to Fig. 2b by actuating the adjusting element 16a, it is rotated until the support element 17 rests against the second guide rail 11, preferably against the underside of the crosspiece 11b of the second guide rail 11. The play (X) is thus equal to zero and forms a reference value for the subsequent adjustment.

For the correct adjustment of the clearance (X), the adjusting element 16a is set starting from the position of the support element 17 according to Fig. 3b adjusted in the opposite direction until the clearance (X) between the support element 17 and the second guide rail 11 has a predetermined value (for example 0.1 mm). This position is in Fig. 3c The relative position of the support element 17 is either self-locking, can be fixed by an additional securing element and/or can be permanently fixed.

Fig. 4a shows the rear end area of the drawer pull-out guide 4 in an exploded view, wherein the first carriage 18, which is slidably mounted between the first and second guide rails 10, 11, with the load-transferring roller bodies 18a and a retraction device 20 for retracting the first guide rail 10 into a closed end position can be seen. The retraction device 20 can be a, preferably hydraulic damping device by which the spring-supported retraction movement of the first guide rail 10 can be braked.

Fig. 4b shows the Fig. 4a circled area in an enlarged view. The first guide rail 10 has a U-profile with two side legs 10a and 10b that are spaced apart from one another and are connected to one another by a cross leg 10c. The support element 17 is accommodated in the assembled position between the two side legs 10a, 10b of the first guide rail 10. The support element 17 can be fixed to the side leg 10a facing the fastening section 9b via the adjusting element 16a in the form of the eccentric. The adjusting element 16a has a pin 21 that engages in a corresponding opening 22 in the first guide rail 10 in the assembled position. After the position of the support element 17 has been adjusted relative to the first guide rail 10, the pin 21 of the adjusting element 16a can be permanently fixed to the first guide rail 10, for example by wobbling. Fig. 5a shows a perspective view of the first guide rail 10 according to an example. Fig. 5b shows the Fig. 5a framed area in an enlarged view. The first guide rail 10 in this example has two or more openings 22 spaced apart in the height direction (H) for optionally receiving the support element 17. The support element 17 can be inserted via a pin 21 either directly into one of the openings 22, so that the support element 17 can assume different heights to adjust the play (X). Alternatively, In this example, the adjustment can also be made using a movably mounted adjustment element 16a. The play (X) between the support element 17 and the second guide rail 11 can therefore be adjusted in such a way that the pin 21 of the adjustment element 16a or of the support element 17 is optionally inserted into one of the openings 22 spaced apart from one another in the height direction (H) and then fixed. Fig. 5c shows a side view of the rear end region of the first guide rail 10 according to this example. The openings 22 can be arranged offset from one another in the height direction (H), for example by 0.2 mm.

Fig. 6a-6c show a further example, wherein the adjusting device 16 for adjusting the clearance (X) between the support element 17 and the second guide rail 11 has an adjusting element 16a in the form of a rotatably mounted worm wheel. Fig. 6b shows the Fig. 6a circled area in an enlarged view. The adjustment element 16a has a receiving device 23 for receiving a tool, preferably a screwdriver, whereby the position of the support element 17 can be adjusted by rotating the receiving device 23 using the tool. On the back of the adjustment wheel 16a in the form of the worm wheel, as is known per se, a spiral guide track is formed, which interacts with a toothing 24 connected to the support element 17. The toothing 24 is in Fig. 6c visible, whereby the rotatably mounted adjustment element 16a is hidden. The adjustment element 16a in the form of the worm wheel forms together with the toothing 24 a drive with high self-locking, so that the position of the support element 17 does not change after adjustment and when the drawer 3 is loaded.

Claims (13)

1. A method for mounting a supporting element (17) to a drawer pull out guide (4), the drawer pull-out guide (4) including:

   - a first guide rail (10) and at least a second guide rail (11) displaceably supported relative to each other,

   - at least one supporting element (17) arranged on a first guide rail (10) for at least temporarily supporting on the second guide rail (11),

   - wherein the position of the at least one supporting element (17) relative to the second guide rail (11) is adjustable by an adjustment device (16), and is fixable relative to the first guide rail (10) after adjustment of the position has been made,

   - wherein the at least one supporting element (17) is adjustable in a height direction (H) by the adjustment device (16) in the mounted position of the drawer pull-out guide (4),

   wherein the method includes the following steps:

   - arranging the supporting element (17) on the first guide rail (10) of the drawer pull-out guide (4),

   - adjusting the supporting element (17) at a predetermined position relative to the second guide rail (11) with the aid of the adjustment device (16),

   - fixing the supporting element (17) relative to the first guide rail (10),

   wherein the method is characterized by the following step:

   - firstly moving the supporting element (17), for adjusting the predetermined position, in a first movement direction until the supporting element (17) abuts against the second guide rail (11), and is subsequently moved back in a second movement direction, opposite the first movement direction, by a predetermined amount until the supporting element (17) is positioned with a predetermined play (X) relative to the second guide rail (11), thereby reaching the predetermined position.
2. The method according to claim 1, characterized in that the guide rails (10, 11) are displaceable relative to each other between a closed position and an open position, wherein the at least one supporting element (17), at least in the closed position, has a play (X) relative to the second guide rail (11), and the play (X) is adjustable by the adjustment device (16) .
3. The method according to claim 2, characterized in that the play (X), in the open position, is smaller than in the closed position, and/or that the at least one supporting element (17), in the open position of the guide rails (10, 11), bears against the second guide rail (11) without play.
4. The method according to one of the claims 1 to 3, characterized in that the adjustment device (16) has a self-locking configuration.
5. The method according to one of the claims 1 to 4, characterized in that the adjustment device (16) includes at least one movably-supported adjustment element (16a), wherein the position of the at least one supporting element (17) is adjustable by an actuation of the adjustment element (16a).
6. The method according to claim 5, characterized in that the adjustment element (16a) is rotationally supported, wherein the position of the supporting element (17) is adjustable by rotating the adjustment element (16a).
7. The method according to claim 5 or 6, characterized in that the adjustment element (16a) includes a rotationally supported eccentric or a rotationally supported worm wheel, and/or co-operates with a tooth arrangement (24) connected to the supporting element (17).
8. The method according to one of the claims 1 to 7, characterized in that the first guide rail (10) includes two or more openings (22) spaced apart from each other in the height direction (H), the two or more openings (22) being configured to selectively receive the supporting element (17) .
9. The method according to one of the claims 1 to 8, characterized in that the position of the at least one supporting element (17), after adjustment, is fixable by a securing element.
10. The method according to one of the claims 1 to 9, characterized in that the position of the at least one supporting element (17) is permanently fixable after adjustment, preferably by welding, bonding or tumbling.
11. The method according to one of the claims 1 to 10, characterized in that the second guide rail (11) includes a side limb (11a) and a transverse limb (11b) connected to the side limb (11a), wherein the at least one supporting element (17), in the mounted position of the drawer pull-out guide (4), is supportable on an underside of the transverse limb (11b) of the second guide rail (11), wherein it is preferably provided that the transverse limb (11b) is configured to be flat over an entire length thereof.
12. The method according to one of the claims 1 to 11, characterized in that the at least one supporting element (17)

    - is a rotationally mounted supporting roller, and/or

    - is arranged on a rear-end region of the first guide rail (10).
13. The method according to one of the claims 1 to 12, characterized in that at least one running carriage (18) with load-transmitting rolling bodies (18a) is arranged between the first guide rail (10) and the second guide rail (11).

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