EP3668351A1

EP3668351A1 - Drawer pull-out guide

Info

Publication number: EP3668351A1
Application number: EP18742905.5A
Authority: EP
Inventors: Marc MEUSBURGER; Lukas KOLHAUPT; Mathias LEIERER
Original assignee: Julius Blum GmbH
Current assignee: Julius Blum GmbH
Priority date: 2017-08-17
Filing date: 2018-07-06
Publication date: 2020-06-24
Anticipated expiration: 2038-07-06
Also published as: US11272784B2; EP3824762A1; US20200170410A1; EP3668351B1; AT519982B1; ES2863466T3; CN110996723B; JP6918206B2; AT519982A4; TW201919515A; TWI672108B; JP2020530370A; WO2019033135A1; CN110996723A

Abstract

The invention relates to a drawer pullout guide (4) comprising: - at least two guide rails (9, 10, 11) which are movably mounted relative to each other, - at least one carriage (15) with load-transmitting rolling bodies (36), wherein the carriage (15) is movably mounted between the at least two guide rails (9, 10, 11), and the guide rails (9, 10, 11) assume a defined position relative to each other in the event of a movement of the at least one carriage (15) when the guide rails (9, 10, 11) have not been positioned incorrectly relative to each other, and - a compensation device (22) for compensating for an incorrect position of the guide rails (9, 10, 11) deviating from the specified relative position, said compensation device (22) having an actuation device (17) which can be actuated by one of the guide rails (9, 10, 11) and which compensates for the incorrect position upon being actuated. A switch device (27) is provided which switches the actuation device (17) of the compensation device (22) out of the engagement with the guide rails (9, 10, 11) when the guide rails (9, 10, 11) are in the defined relative positions.

Description

drawer

The present invention relates to a drawer extension guide comprising:

at least two guide rails, which are mounted displaceably relative to one another,

- At least one carriage with load-transmitting rolling elements, wherein the carriage between the at least two guide rails is movably mounted, wherein the guide rails occupy a predefined relative position to each other during a movement of the at least one carriage, if there is no misalignment of the guide rails to each other,

- A compensation device for compensating a deviating from the predefined relative position misalignment of the guide rails to each other, wherein the compensation device comprises an actuatable by one of the guide rails actuating device which compensates for the malposition when actuated.

Furthermore, the invention relates to a drawer with at least one drawer extension guide of the type to be described.

As misalignments in Schubladenausziehführungen both rail misalignments and carriage misalignments are referred to, which can lead to an open position of the drawer in normal use. A rail misalignment occurs, for example, when the drawer rail deviates from the synchronous run relative to the displaceable center rail, as a result of which the relative position of the rails relative to one another is incorrect. As a carriage error, however, a malposition of the carriage is called, which builds up on an opening and closing movement and which is determined by the difference built to the correct starting position. A carriage error can build up in particular due to slippage or due to elasticity in the roller or running system during the course of movement. From a certain number of movements, the carriage can finally move so far from its target position that this impinges on a limit stop in the rail system before the drawer at all the reached full end position relative to the furniture body. Drawer extension guides are also often equipped with a collection device and with a damper, which dampens the collection path of the drawer over the last closing range up to the full closed position. However, these dampers reduce the closing dynamics of the drawer to such an extent that a malposition arising during the movement of the drawer can no longer be compensated for lack of kinetic energy. For any additional movement, in which the drawer is not fully opened, the drawer remains in an open position due to the malposition, which visually disturbing and also brings with it the risk of collisions with persons or objects.

In EP 1 374 734 A1 a drawer pull-out guide with a compensation device for compensating for a synchronous running error of the guide rails is shown. Here, a compensation lever with two lever arms is mounted on the center rail, wherein at the end of the closing movement, a first lever arm cooperates with the drawer rail and a second lever arm with the carcass rail. The compensation device is designed as a non-continuous synchronization, but as a so-called pseudo-synchronization or self-healing of a depth gap, which results between the back of the drawer front panel and the front side of the furniture body. The compensation device is designed so that said depth gap is corrected during the closing movement of the drawer to a certain value. The disadvantage of this is that the compensation lever cooperates with each drawer movement with the drawer rail and with the carcass rail, which in addition to unpleasant noise also increases the friction and the drawer must be moved with an increased effort in the full end position. Due to the friction occurring also the spring force of the feeder device is to be dimensioned higher, so that the drawer is reliably retractable into the closed end position. Object of the present invention is to provide a drawer extension of the type mentioned above while avoiding the disadvantages discussed above. This is achieved by the features of claim 1. Further advantageous embodiments of the invention are specified in the dependent subclaims.

According to the invention, it is therefore provided that a switching device is provided, which switches the actuating device of the compensation device in the presence of the predefined relative position of the guide rails to each other out of engagement with the guide rail.

In other words, the actuating device of the compensation device can only be actuated by a movement of a guide rail, if there is actually a misalignment of the guide rails. On the other hand, if there is no misalignment, the guide rails can be moved relative to one another without being adversely affected by the compensation device.

It can be provided that the actuating device of the compensation device comprises a guide rail movably mounted on an actuating element which is arranged to compensate for the malposition by a arranged on another guide rail or stop and actuation element is in the presence of the predefined relative position of the stop out of engagement ,

The stop for actuating the actuating element can be arranged at a front end region of a guide rail. It can be provided that the stop protrudes transversely from the guide rail and preferably protrudes in the mounting position of a guide rail down.

The switching device may have a movably mounted switching element, which is connected in a motion-coupled manner with the actuating element, for example via at least one joint axis. The switching element may have a first switching position and at least a second switching position, wherein the actuating element is in the first switching position of the switching element - in the presence of misalignment of the guide rails to each other - in a first position, in which the actuating element with the stop is detachably coupled, and where the Actuating element in the second switching position of the switching element - in the presence of the predefined relative position of the guide rails to each other - is in a second position in which the actuating element is disengaged from the stop.

To control a movement of the switching element, a blocking means can be provided, which is arranged or formed on one of the guide rails and which blocks a movement of the switching element - in the presence of misalignment of the guide rails to each other - starting from the first switching position to the second switching position. It can be provided that the switching element in the first switching position - in the presence of misalignment of the guide rails to each other - abuts the locking means, wherein the actuating device of the compensation device can be actuated by a guide rail. In the second switching position of the switching element - in the presence of the predefined relative position of the guide rails to each other - the switching element may be in an exemption, so that the actuating device of the compensation device is out of engagement with the guide rail and consequently can not be actuated by this.

According to one embodiment, it may be provided that the compensation of the malposition takes place during the opening movement of the drawer extension guide. This has the advantage that during the opening movement of a guide rail anyway a manual force must be exerted on the drawer and that a possible correction of the malposition makes virtually no noticeable for a user. Further details and advantages of the invention will become apparent from the following description of the figures. It shows or show:

Fig. 1 is a perspective view of a piece of furniture with a

Furniture carcass and relatively movably mounted drawers, Fig. 2 is a drawer pull-out in a perspective view,

3a-3d the drawer pull-out guide in various views and enlarged detailed representations thereto,

Fig. 4a-4c, the drawer extension in a cross section and two enlarged views of a pull-out movement of Guide rails with a correct, predefined

Relative position to each other,

5a-5d, the drawer extension guide in a perspective view and in a side view and enlarged detail views of this,

6a-6d show a time sequence of the correction of a malposition

Guide rails in enlarged detail,

Fig. 7a, 7b, the drawer extension and

Compensation device in exploded views.

Fig. 1 shows a piece of furniture 1 with a cabinet-shaped furniture body 2, wherein drawers 3 are movably mounted on Schubladenausziehführungen 4 relative to the furniture body 2. The drawers 3 each have a front panel 5, a drawer bottom 6, side walls 7 and a rear wall 8. In the exemplary embodiment shown, the drawer pull-out guides 4 each comprise a first guide rail 9, which is to be fastened to the furniture carcass 2 via fastening sections 12a, 12b, a third guide rail 11 displaceably mounted relative to the first guide rail 9, which is to be connected to the drawer 3 and a second guide rail 10, which is movably mounted to realize a full extension of the drawer 3 between the first guide rail 9 and the third guide rail 11. But it is also possible that the drawer extension guide 4 only two relatively displaceable guide rails 9, 10 has.

2 shows a perspective view of a drawer pull-out guide 4 with the first guide rail 9 to be fastened to the furniture body 2 and the third guide rail 11 to be fastened to the drawer 3, between which the second guide rail 10 is displaceably mounted. By a synchronization device 13, the movement of a carriage 15 is controlled, which is slidably mounted between the guide rails 9, 10, 11. In the exemplary embodiment shown, the synchronization device 13 has a toothed wheel 14 which is rotatably mounted on the second guide rail 10 and which is movably supported on the one hand with the first carriage 15 which is movably mounted between the first guide rail 9 and the second guide rail 10 and on the other hand with a (not shown here ) second carriage 28 (Fig. 4a), between the second Guide rail 10 and the third guide rail 11 is movably mounted, via toothings 15a, 28a of the first and second carriage 15, 28 cooperates. At the front end of the third guide rail 11, a functional unit 18 is provided with an end stop 20 which abuts in the closed position of the drawer extension guide 4 for limiting an insertion movement of the third guide rail 11 on a counter-stop 21 of the first guide rail 9.

In addition, a compensation device 22 is provided, by means of which a misalignment of the guide rails 9, 10, 11 deviating from a predefined relative position can be compensated for one another. The compensation device 22 comprises in the illustrated embodiment, a stop 19 which projects transversely from the third guide rail 11 down and arranged on the second guide rail 10 actuating device 17 which is actuated by the stop 19 at a malposition of the guide rails 9, 10, 11.

3a shows the drawer pull-out guide 4 in the closed position with the first, second and third guide rails 9, 10, 11 in a perspective view. Fig. 3b shows the circled in Fig. 3a area in an enlarged view. At the front end of the second guide rail 10, a bearing part 16 is arranged with the actuating device 17, which in the presence of a malposition of the guide rails 9, 10, 11 can be actuated by the arranged on the third guide rail 11 stop 19.

Fig. 3c shows a side view of the drawer pull-out guide 4, Fig. 3d shows the framed in Fig. 3c front portion in an enlarged view. The actuating device 17 has a movable, preferably pivotable, mounted actuating element 17a, which is releasably coupled to the stop 19 in a misalignment. The actuating element 17a may, for example, have an arcuate peripheral surface along which the stop 19 is at least partially movable. By a switching device 27, the actuator 17 is in the presence of the (correct) predefined relative position of the guide rails 9, 10, 11 to each other out of engagement with the third Guide rail 11, preferably the stop 19, switchable. The switching device 27 has a movable, preferably about an axis 24 pivotally mounted, switching element 27a, which is connected in a motion-coupled with the actuating element 17a. In the exemplary embodiment shown, the switching element 27a and the actuating element 17a are pivotally connected to one another via at least one traveling articulation axis 25. By an energy storage 26, the actuating element 17a and the switching element 27a are biased relative to each other such that the actuating element 17a and the switching element 27a are forced apart by the force of the energy accumulator 26 about the hinge axis 25. The switching element 27a is pivotally mounted about the axis 24 and has a projection 27b, which rests in the closed position of the second guide rail 10 on a locking means 23, preferably a web, the first guide rail 9. By the blocking means 23, a movement of the switching element 27a - in the presence of the misalignment of the guide rails 9, 10, 11 to each other - prevents starting from the first switching position to the second switching position. In FIGS. 3a-3d, the guide rails 9, 10, 11 assume a correct, predefined relative position to one another.

Fig. 4a shows the drawer extension guide 4 in a cross section. Between the first guide rail 9 and the second guide rail 10, a first carriage 15 with first rolling elements 36 (FIG. 7a) is supported, while between the second guide rail 10 and the third guide rail 11, a second carriage 28 with second rolling elements 37 is slidably disposed. By a synchronization device 13, the movement of the two carriages 15, 28 to each other controllable. The synchronization device 13 comprises a toothed wheel 14 which is rotatably mounted on the second guide rail 10 and which meshes with a first toothing 15a of the (lower) first carriage 15 and with a second toothing 28a of the (upper) second carriage 28. In Fig. 4a, the third guide rail 11 is in a low open position. FIG. 4b shows the front area of the drawer pull-out guide 4 framed in FIG. 4a in an enlarged view, from which the compensation device 22 can be seen in greater detail. In the illustrated Figures 4a-4c, the guide rails 9, 10, 11 are in a predefined, correct relative position to each other. Now, if the third guide rail 11, starting from the closing position shown in Fig. 3d is moved in the withdrawal direction 29, so the switching element 27a enters an exemption 30 so that the switching element 27a is tilted together with the actuator 17a about the axis 24 in a clockwise direction such that arranged on the third guide rail 11 Stop 19 without obstruction by the actuator 17 is further movable toward the open position. The release 30 may either be formed as a recess in the first guide rail 9, or - as shown in the figure - be formed by a mounting position in front of the first guide rail 9 clearance, so that the projection 27b of the switching element 27a virtually goes into void. During a movement of the third guide rail 11 against the pull-out direction 29, the latter can be moved back into the closed position without hindrance by the actuating device 17, the actuating element 17a being able to be overtraveled by the stop 19, possibly against the force of the energy store 26. 5a shows the drawer pull-out guide 4 in a perspective view, wherein the guide rails 9, 10, 11 - assume, for example, a slip occurring between the carriages 15, 28 and the guide rails 9, 10, 11, a different position from the predefined relative position , This can lead, for example, to the second guide rail 10 being positioned too far back relative to the first guide rail 9, ie the first and second guide rails 9, 10 abutting one another via a contact point 31 (FIG. 5b) and thus there is a misalignment to be corrected ,

Fig. 5b shows the circled in Fig. 5a area in an enlarged view. 5c shows a side view of the drawer pull-out guide 4, while in FIG. 5d the front area of the drawer pull-out guide 4 framed in FIG. 5c is enlarged. In the fully closed position, the projection 27b of the switching element 27a bears against the blocking means 23 of the first guide rail 9. The foremost region of the web of the first guide rail 9 may extend obliquely downward toward the front, whereby the friction is reduced and the tilting behavior of the switching element 27a is improved.

6a-6d show a time sequence of the opening movement of the third guide rail 11 in the pull-out 29. Starting from Fig. 5d, in which a Deformation of the second guide rail 10 is present relative to the first guide rail 9, the actuator 17a of the actuator 17 from the stop 19 of the third guide rail 11 contacted (Fig. 6a). The projection 27b of the switching element 27a is applied to the blocking means 23 of the first guide rail 9, wherein the blocking means 23 prevents movement of the switching element 27a in a second, deactivated switching position of the switching element 27a, so that the switching element 27a can not be tilted about the axis 24 , The third guide rail 11 is thus coupled via the stop 19 and via the actuating element 17a with the second guide rail 10. Since the third guide rail 11 moves through the synchronization device 13 (FIG. 2) at a higher, preferably approximately twice, speed than the second guide rail 10, the second guide rail 10 is briefly coupled to the higher speed of the third guide rail 11. The second guide rail 10 and the third guide rail 11 are thus movable relative to the first guide rail 9 in the compensation of a misalignment at the same speed, the second guide rail 10 is towed over the rolling elements 36 of the first carriage 15 away (Fig. 6b, Fig. 6c ). The projection 27b of the switching element 27a, after correcting the misalignment again go beyond the front end of the first guide rail 9, so that the switching element 27a is tilted about the axis 24, thereby releasing the coupling between the actuator 17a and the stop 19 of the third guide rail 11 becomes. The second guide rail 10 has thus again reached its desired position relative to the first guide rail 9 in FIG. 6d. Fig. 7a shows the drawer pull-4 in an exploded view. The first guide rail 9 is attached to a furniture body 2 and the third guide rail 11 is to be attached to the drawer 3, wherein the second guide rail 10 is slidably mounted between the first and third guide rail 9 and 11. Between the first and second guide rail 9, 11 is a first carriage 15 with a plurality of spaced apart longitudinally rolling elements 36 and a separate therefrom another carriage 38 with rolling elements 38 a slidably mounted. Between the second and third guide rail 10, 11, a second carriage 28 is slidably mounted with a plurality of spaced rolling elements 37 in the longitudinal direction. By a rotatably mounted on the second guide rail 10 gear 14, which meshes with the teeth 15a, 28a of the first and second carriage 15, 28, the movements of the carriage 15, 28 are mutually controllable. At the front end region of the second guide rail 10, the bearing part 16 with the actuating device 17 and with the switching device 27 is to be fastened. At the front end region of the third guide rail 11, the functional unit 18 with the end stop 20 and the stop 19 is arranged. By a movable carrier 34, which is biased by a spring device 32, the third guide rail 11 is retractable towards the end of the closing movement in the closed end position. By a damping device 33, preferably with a piston-cylinder unit, this spring-assisted retraction movement can be braked in the closed end position. The spring device 32 and the damping device 33 are fastened to the third guide rail 11 via a holder 35.

FIG. 7b shows the actuating device 17 arranged on the bearing part 16 and the switching device 27 in an exploded view. The actuating element 17a and the switching element 27a are connected to one another via a hinge axis 25. By an energy storage 26, for example in the form of a leg spring, the actuating element 17a and the switching element 27a are biased relative to each other. In this way, the switching element 27a can be pressed by the force of the force accumulator 26 against the blocking means 23, resulting in a defined switching behavior of the switching element 27a between the two switching positions. On the other hand, during the insertion movement of the third guide rail 11, the actuating element 17a can be run over against the force of the energy accumulator 26, so that the third guide rail 11 can be moved into the closed position without substantial obstruction.

The actuator 17 may, unlike the figures shown, be arranged not only on the second guide rail 10 but also on the other guide rails 9, 11 and at other positions along the longitudinal direction thereof. For example, it is possible to arrange the actuating device 17 for correcting a misalignment of the third guide rail 11 relative to the second guide rail 10 on the third guide rail 11 and the stop 19 for actuating the actuating device 17 on the second guide rail 10.

Claims

Claims 1. Drawer extension guide (4), comprising:

- At least two guide rails (9, 10, 11), which are mounted relative to each other displaceable,

- At least one carriage (15) with load-transmitting rolling elements (36), wherein the carriage (15) between the at least two guide rails (9, 10, 11) is movably mounted, wherein the guide rails (9, 10, 11) during a movement of the at least one carriage (15) occupy a predefined relative position to one another, if there is no misalignment of the guide rails (9, 10, 11) relative to one another,

- A compensation device (22) for compensating a deviating from the predefined Relativsteliung incorrect division of the guide rails (9, 10, 11) to each other, wherein the compensation device (22) by one of the guide rails (9 _S 10, 11) operable actuator (17) , which compensates for the malposition when actuated,

characterized in that a Schaitvorhchtung (27) is provided, the soft actuation device (17) of the compensation device (22) in the presence of the predefined Relativsteliung the guide rails (9, 10, 11) to each other out of engagement with the guide rail (9, 10, 11) on.

2. drawer pull-out according to claim 1, characterized in that the actuating device (17) of the compensation device (22) on a guide rail (10) movably mounted actuating element (17 a) which, to compensate for the malposition by a on another guide rail (11) arranged or formed stop (19) is actuated and wherein the Betätigungsseiement (17a) is in the presence of the predefined Relativsteliung from the stop (19) disengaged.

3. drawer pull-out according to claim 2, characterized in that the stop (19) projects transversely from a front end region of a guide rail (11).

4. Schubledenausziehführung according to one of claims 1 to 3, characterized in that the switching device (27) has a movably mounted Sehaltelement (27a), which is connected to the actuating element (17a) of the compensation device (22) coupled for movement.

5. drawer pull-out according to claim 4, characterized in that the switching element (27 a) with the actuating element (17 a) via at least one hinge axis (25) is pivotally connected,

6. drawer pull-out according to claim 4 or 5, characterized in that the switching element (27 a) has a first switching position and at least a second switching position, wherein the actuating element (17 a) in the first switching position of the switching element (27 a) - in the presence of the malposition of Guide rails (9, 10, 1 1) to each other - in a first position, in which the actuating element (17a) with the stopper (19) is detachably koppeibar, and wherein the actuating element (17a) in the second switching position of the switching element (27a ) - in Voriiegen the predefined relative position of the guide rails (9, 10, 1 1) to each other - in a second position, in which the actuating element (17a) from the stop (19) is disengaged.

7. drawer pull-out according to claim 6, characterized in that one of the guide rails (9, 10, 11) has a blocking means (23), which movement of the switching element (27 a) - in the presence of misalignment of the guide rails (9, 10, 1 ) to each other - starting from the first switching position locks in the second switching position.

8. drawer extension according to claim 7, characterized in that the blocking means (23) by a web of the guide rails (9, 10, 1 1) is formed.

9. drawer pull-out according to claim 8, characterized in that the blocking means (23) on a, preferably front, end portion of the guide rails (9, 10, 1 1) is arranged.

10, Schubiadenausziehführung according to one of claims 4 to 9, characterized in that the actuating element (17a) of the compensation device (22) and the Schaitelement (27a) of the switching device (27) by a force accumulator (26) are biased relative to each other.

11. Schubiadenausziehführung according to one of claims 1 to 10, characterized in that the Schubiadenausziehführung (4) has a synchronization device (13) for controlling a synchronous movement of the at least one running path (15).

12. Schubiadenausziehführung according to one of claims 1 to 11, characterized in that the Schubiadenausziehführung (4) has a third, on the drawer (3) to be fastened guide rail (11), soft relative to the first and second guide rail (9, 10) movable is stored.

13, Schubiadenausziehführung according to claim 12, characterized in that the second guide rail (10) and the third guide rail (11) in the compensation of the misalignment at the same speed with respect to the first guide rail (9) are movable,

14, Schubiadenausziehführung according to claim 12 or 13, characterized in that between the second guide rail (10) and the third guide rail (11) at least one second carriage (28) with load-transmitting rolling elements (37) is displaceably mounted.

15. Schubiadenausziehführung according to claim 14, characterized in that the synchronization device (13) at least one, preferably on the second guide rail (10) rotatably geiagertes gear (14) which on the one hand with the first carriage (15) and on the other hand with the second

Carriage (28) cooperates.

16. drawer pull-out according to one of claims 1 to 15, characterized in that the compensation of FehMeliung during the opening movement of the drawer pull-out (4).

17. Schüblade (3) with at least one drawer extension guide (4) according to one of claims 1 to 16 for moving the drawer (3) relative to a IVlöbelkorpus (2).