WO2014180891A1

WO2014180891A1 - Drawer slide and damping element for a drawer slide

Info

Publication number: WO2014180891A1
Application number: PCT/EP2014/059319
Authority: WO
Inventors: Sebastian König
Original assignee: Paul Hettich Gmbh & Co. Kg
Priority date: 2013-05-07
Filing date: 2014-05-07
Publication date: 2014-11-13
Also published as: TR201902345T4; CN105188480A; DE102013104732A1; ES2717676T3; EP2994013A1; CN105188480B; EP2994013B1

Abstract

The invention relates to a damping element (50) for a drawer slide for damping a stop of a rolling element cage (40) of the drawer slide on a stop (21), which is arranged on a guide rail of the drawer slide. The damping element (50) comprises at least two different materials having different hardness levels, wherein at least one layer made of a harder material is applied to a core (51) made of a softer material. The invention further relates to a drawer slide, in particular for a movable furniture piece, comprising such a damping element.

Description

The invention relates to a damping element for a pull-out guide for a pull-out guide and damping element for a pull-out guide

Attenuation of a stop of a roller cage of the pullout guide to a stop which is arranged on a guide rail of the pullout guide. The invention further relates to a pullout guide with such a damping element.

Pull-out guides with two or more mutually movable guide rails make it possible to store a movable furniture part, for example a drawer, also referred to as a drawer, a device carrier or the like easily extendable and extend, for example, from a furniture body. To a possibly material damaging hard

To prevent striking at a retraction of a furniture part, it is known to provide pullout guides with a hydraulic or pneumatic closing damper. Such closing dampers are often combined with a feed mechanism through which a furniture part, for example a drawer, moves into the closed position when approaching the retracted position.

Furthermore, for example, from the document DE 20 2005 014 050 U1 a pullout guide for furniture parts is known in which when approaching a fully extended position of the furniture guide the opening movement is damped. For this purpose, one of the closing damping comparable hydraulic or pneumatic opening damping is provided in the pullout guide. This opening damping can also be connected to a self-extracting mechanism, which prevents the mounted movable furniture part from being too easily re-moved from the completely open position due to an accidental knocking. The document further discloses a pullout guide in which both the closing and the opening movement is damped by using two Endlagendämpfungseinheiten. The closing and / or opening damping is very comfortable to operate with a pull-out guide by means of the aforementioned mostly hydraulically or pneumatically operated damping units, since a long damping travel and a correspondingly gentle braking can be achieved. In less high-quality systems, or if only one of the two movements, preferably the closing movement, is to be comfortably damped in the manner mentioned, and for reasons of cost and material saving, there is a need for a simpler damping, which may provide a less long damping path, but still suitable to prevent too hard striking the pullout guide in the final position. For this purpose, it is known, for example, from the publication DE102010042180, the use of stopper damping elements which consist of a soft material and are positioned between two components of the drawer slide which are to be moved towards one another, for example a roller body cage and a stop arranged on a guide rail.

Such damping elements are a favorable alternative to the hydraulic or pneumatic damping units, but are often limited in their lifetime, since the soft material used for damping is often damaged by hard edges of the roller cage or the stop after prolonged use. It is therefore an object of the present invention to provide a damping element of the type mentioned, which has a prolonged life with a simple structure compared to the known damping elements. It is a further object to provide a drawer slide with a simple but effective and durable damper mechanism.

This object is achieved by a damping element or a pullout guide with the features of the independent claims. Advantageous embodiments and further developments are the subject of the dependent claims. An inventive damping element of the type mentioned above is characterized in that at least two different materials are used with different hardnesses, wherein at least one layer of a harder material is applied to a core of a softer material.

The damping element thus consists of a composite of two materials of different hardness, wherein the softer material is used for damping and the harder material protects the surface of the softer core in at least one layer. Preferably, at least one abutment surface of the damping tion element, with which the damping element meets a stop, protected by the at least one layer of the harder material.

In an advantageous embodiment of the damping element, two opposing side surfaces of the damping element are each covered with a layer of the harder material. In this way, both surfaces over which force is applied to the damping element can be protected.

In this case, the two layers of the harder material are particularly advantageously formed as cheeks, which are connected to each other in at least one section by a connecting arc of the harder material. Preferably, the two cheeks and the connecting sheet are made in one piece from the harder material. In a manufacturing method of the damping element, the staple-shaped structure thus formed can be made from the harder material in an injection molding process. In a second

Injection molding step, the staple-shaped structure can then be completed around the core of the softer material. The cheeks made of the harder material can be designed profiled towards the softer core and thus provide anchors that cause a better connection of the two materials. Alternatively, it can also be provided that the core can be inserted as a separate part into the damping element, for example, clipped into the clamp-shaped structure or clamped.

In a further advantageous refinement, the damping element has fastening means for fastening the damping element to a roller body cage or to a guide rail of a pullout guide. The fastening means may be, for example, pins, possibly undercut pins, or latching elements, for example latching hooks. In this way, the damping element can be easily attached to a Wälzkörperkäfig. This can be done before mounting the Wälzkörperkäfigs in the pullout guide already during assembly of the pullout guide. In a determination of the damping element on one of the guide rails, this can also be done before mounting the pullout guide. Such, in a simple manner can be attached or clipped damping element can be retrofitted, if necessary, even with already mounted pullout guides.

In a further advantageous embodiment, the damping element can also be designed as part of the rolling element cage, in which case at one end or a damping element is arranged at both ends of the rolling element cage.

In a further advantageous embodiment, the core may be provided with openings. The breakthroughs allow in their size, geometry, arrangement and number a variable adjustment of the damping properties of the damping element.

A pull-out guide according to the invention, in particular for a movable furniture part, has at least two mutually displaceable guide rails, wherein between the guide rails at least one Wälzkörperkäfig is arranged with a plurality of rolling elements and wherein at least one of the guide rails, a stop for the at least one Wälzkörperkäfig is formed. The drawer slide is characterized by at least one such damping element, which is arranged between the Wälzkörperkäfig and the stop. The damping element can be fixed, for example, on the roller body cage and / or on the stop on the guide rail and in particular be clipped. This results in the advantages described in connection with the damping element.

The invention will be explained in more detail by means of embodiments with reference to figures. Show it:

Fig. 1a is a perspective view of a pullout guide in a retracted state;

Fig. 1 b is an exempted guide rail of the pullout guide of

Fig. 1 a and

Fig. 1 c is a detail of a section of Figure 1 b.

2a to 2c representations analogous to Figure 1, but with the pullout guide in a fully extended position;

3 and 4 each show an embodiment of a damping element in a perspective view (partial image a) and a side view (partial image b). and 5a to 5c each show a further embodiment of a damping element in a perspective view.

1 and 2 show in perspective views an exemplary embodiment of a pullout guide with a damping element, wherein Fig. 1, the pullout guide in a retracted and Fig. 2 reproduced the pullout guide in an extended state. FIGS. 1 a and 2 a are overview views in each case, FIGS. 1 b, 1 c and 2 b, 2 c show details of an isolated part of the pullout guide. References to such

Detail enlargements are indicated in the figures by corresponding Roman numerals.

The pullout guide has three guide rails, a carcass rail 10, a middle rail 20 and a running rail 30. The middle rail 20 is displaceably mounted relative to the carcass rail 10 and with respect to the running rail 30 via rolling elements not visible in FIGS. 1a and 2a. The design of the pullout guide as a so-called full extension with three guide rails is purely exemplary. The damping element according to the invention can also be used in a pullout guide with only two guide rails.

In the illustrated embodiment, the carcass rail is designed approximately c-shaped, wherein on the open side of the c-shaped profile opposite longitudinal side of the carcass rail 10 two mounting tabs 1 1 are attached. These serve to fix the carcass rail 10 to a furniture body, for example a kitchen cupboard.

The running rail 30 is also configured in its profile in approximately C-shaped, wherein it is open towards the middle rail 20 downwards. The running rail 30 has at its ends fastening means 31, with which it can be fixed to a movable furniture part, such as a drawer. In the illustrated embodiment, the fastening means 31 are a push-in tab and a notch provided with notches. It is understood that the configuration of the fastening means 31 as well as the mounting tabs 1 1 can be varied within the scope of the invention. In the illustrated embodiment, the center rail 20 is arranged vertically between the carcass rail 10 and the running rail 30. The arrangement of the guide rails to each other is just like the profiling of the guide rails purely exemplary. Next, the drawer guide optionally synchronization means which cause a mirror image synchronous movement of the carcass rail 10 and the running rail 30 relative to the central rail 20. In a pullout guide of the type shown a synchronous movement of the rails to each other is basically given if the rolling elements move between the individual pairs of rails in an actuation of the pullout guide without slippage. The synchronization means ensure such movement without slippage of the rolling elements. In the present exemplary embodiment, two rollers 22 with a circulating belt are provided on the middle rail 20 as synchronization means. In each case one of the rollers 22 is arranged in the end region of the middle rail 20. The circulating belt is fastened on one side to the carcass rail 10 and on the other hand to the running rail 30.

In Figs. 1 b and 2b, the center rail 20 is shown in a rear view released from the other two rails. In this illustration, rolling element cages 40 are visible, in which the already mentioned rolling elements (with reference numeral 42) are arranged. The position of the Wälz- body cages 40 on the middle rail 20 is given by the respective extended position.

As rolling elements cylindrical rollers are used here, in principle, rolling elements of other shapes, such as balls can be used. The middle rail 20 is made as a punched / bent part of a metal sheet, wherein a triangular running profile with three running surfaces is formed at the top and bottom. The Wälzkörperkäfige 40 include the running profiles, wherein each of the three treads 42 are associated with rolling elements. The rolling elements 42 are arranged in pockets 43 in the rear and front portions of the rolling element cage 40. The central portion of the rolling element cage 40 functions as a spacer for the rolling element packages. In alternative embodiments, several, then possibly shorter Wälzkörperkäfige for each of the pairs of rails (cabinet rail 10 / middle rail 20 and middle rail 20 / rail 30) may be provided.

In the rear region of the middle rail 20, a stop 21 is formed on the lower running profile by a tab being bent out of the sheet metal of the middle rail 20. Due to the rear view of the rear portion of the center rail 20 is shown in Figs. 1 b and 2b left. In the direction of the longitudinal extent of the middle rail 20, a damping element 50 is arranged at the ends of each roller body cage 40. The damping elements 50 are thus upstream of this in the direction of movement of the Wälzkörperkäfige 40 like bumpers. FIGS. 1 c and 2 c each show an enlarged detail of the rear region of the lower rolling body cage 40. The enlarged cutouts are indicated in FIGS. 1 b and 2 b by references 1 c and 1 c. It can be seen in the enlargements that the damping elements 50 are each arranged on an end face 41 of the roller cage 40.

In a complete excerpt of the pullout guide beats, as shown in Fig. 2c, the lower Wälzkörperkäfig 40 with the superior damping element 50 against the stop 21st Another attack on the

Carcass rail 10 is mounted, beats against the upper end of the lower Wälzkörperkäfigs 40 superior damping element 50. The striking at the full extension of the pullout guide is thus absorbed by the damping elements 50. As can also be seen in FIG. 2, a further stop is also formed on the middle rail 20, specifically in the front region of the middle rail 20 (in the figure on the right). This further stop has a limiting effect on the movement of the rolling element cage 40 when the pull-out guide is inserted. In Fig. 3, a first embodiment of a damping element 50, as used for example in Figs. 1 and 2, shown in more detail. Fig. 3a shows a perspective view; Fig. 3b is a side view.

The damping element 50 has a core 51 of a soft material disposed between two layers of a harder material. The layers of the harder material are formed as two cheeks, an outer cheek 52a and an inner cheek 52i, which surround the core 51 on two opposite sides. With the inner cheek 52i, the damping element 50 is located on the end face 41 of the Wälzkörperkäfigs 40; With the outer cheek 52a, contact is made with the stop 21. Seen in the direction of movement, the cheeks 52i, 52a are C-shaped, wherein they run parallel to each other in the lower region at the same distance, run towards one another in the middle region and are connected to one another in the upper region by a connecting bow 53. The bracket-shaped support structure formed by the cheeks 52i and 52a and the connecting sheet 53 may be made, for example, of a hard and impact-resistant plastic material, preferably in one piece in an injection molding process. The core 51 fills the area between the two cheeks 52i and 52a of the carrier. The core 51 can be injection-molded onto the carrier in a second injection-molding step. In the connecting region of core 51 and cheeks 52a, 52i, these have an armature 54 protruding into the core 51, for example a web, for increasing the strength of the connection between the two materials. As material for the core 51, a soft, elastic material may be used, for example a thermoplastic elastomer such as polypropylene (PP), ethylene-propylene-diene monomer (EPDM), styrene-butadiene-styrene (SBS) or an elastomer such as nitrile rubber ( Nitrile butadiene rubber - NBR), styrene butadiene rubber (SBR), butadiene rubber (Butadiene Rubber - BR) or

Chloroprene rubber (Chloroprene Rubber - CR). More preferably, the material absorbs shock without applying large restoring forces.

On the inner cheek 52i fastening means are formed to connect the damping element 50 with the Wälzkörperkäfigs 40. In the illustrated example, a slightly undercut pin 55 and a latching hook 56 are provided as fastening means with which the damping element 50 can be clipped onto the roller body cage 40. In this way, the damping element 50 can also be easily retrofitted or replaced.

3 shows a second embodiment of the damping element 50. From the construction of this damping element 50 corresponds to that of FIG. 3, but in the lower region, the cheeks 51 i and 52 a further spaced apart and the core 51 correspondingly wider ,

In Fig. 5 three further embodiments of a damping element 50 are shown in perspective views. The embodiments are alternative embodiments of the embodiment of FIG. 3, to the description of which reference is hereby made.

In the embodiment according to FIG. 5 a, the connection sheet 53 is weakened significantly by introducing an incision 531 in its material thickness in comparison with the example of FIG. 3 a. The cheeks 51 a and 52i experience so when squeezing less large restoring forces through the connecting bow 53. As a result, the damping element 50 springs less strongly back through the carrier - the spring and damping properties are more advantageously defined by the material of the core 51.

The same is achieved in the embodiment of Fig. 5b, in which the connecting sheet 53 has an opening 532.

In the embodiment of FIG. 5c openings 51 1 are introduced into the core 51, through which the spring and damping properties of the core 51 can be modified. The openings 51 1 can be varied in number, size, geometry and arrangement in order to change the properties of the core 51 in a targeted manner.

LIST OF REFERENCE NUMBERS

10 carcass rail

1 1 mounting bracket

20 middle rail

21 stop

22 roll

30 track rail

31 fasteners

40 rolling element cage

41 face

42 rolling elements

43 pockets

50 damping element

51 soft core 51 1 breakthrough

52a outer cheek 52i inner cheek

53 connecting bow

531 incision

532 breakthrough

54 anchors

55 cones

56 snap hooks

Claims

claims

1 . Damping element (50) for a pullout guide for damping a stop of a rolling element cage (40) of the pullout guide to a stop (21) which is arranged on a guide rail of the pullout guide, characterized in that

the damping element (50) has at least two different materials with different hardnesses, wherein at least one layer of a harder material is applied to a core (51) made of a softer material.

2. damping element (50) according to claim 1, wherein the layer of the harder material forms at least one stop surface of the damping element (50).

3. damping element (50) according to claim 1 or 2, wherein the layer of the two opposite side surfaces are formed from a respective layer of the harder material.

4. damping element (50) according to claim 3, wherein the two layers of the harder material than cheeks (52a, 52i) are formed, which are connected in at least one portion to each other by a connecting sheet (53) made of the harder material.

5. damping element (50) according to claim 4, wherein the two cheeks (52 a, 52 i) and the connecting bow (53) are made in one piece from the harder material.

6. damping element (50) according to claim 5, wherein the core (51) in an injection molding process between the two cheeks (52a, 52i) is injected.

7. damping element (50) according to any one of claims 1 to 5, wherein the core (51) in the damping element (50) is used separately.

8. damping element (50) according to any one of claims 1 to 7, comprising a fastening means for attachment to a Wälzkörperkäfig (40).

9. damping element (50) according to one of claims 1 to 7, comprising a fastening means for attachment to a guide rail of the pullout guide.

10. damping element (50) according to any one of claims 7 to 9, wherein the fastening means is an undercut pin (55) and / or a latching hook (56).

1 1. Damping element (50) according to one of claims 1 to 10, wherein the core (51) has openings (51 1).

12. pullout guide, in particular for a movable furniture part, comprising at least two mutually displaceable guide rails, wherein between the guide rails at least one Wälzkörperkäfig (40) with a plurality of rolling elements (42) is arranged and wherein at least one of the guide rails a stop (21) the at least one Wälzkörperkäfig (40) is formed, characterized in that at least one damping element (50) according to one of claims 1 to 1 1 between the Wälzkörperkäfig (40) and the stop (21) is arranged.

13. pullout guide according to claim 12, wherein the at least one damping element (50) on an end face (41) of the Wälzkörperkäfigs (40) is fixed.

14. pullout guide according to claim 13, wherein the at least one damping element (50) on the Wälzkörperkäfig (40) is clipped.