EP4027836A1

EP4027836A1 - Pull-out guide

Info

Publication number: EP4027836A1
Application number: EP20764996.3A
Authority: EP
Inventors: Waldemar PETKER
Original assignee: Paul Hettich GmbH and Co KG
Current assignee: Paul Hettich GmbH and Co KG
Priority date: 2019-09-13
Filing date: 2020-09-01
Publication date: 2022-07-20
Anticipated expiration: 2040-09-01
Also published as: WO2021047951A1; ES2942140T3; DE102019124732A1; US20220330696A1; EP4027836B1; CN114401650A

Abstract

A pull-out guide (1) comprises a stationary guide rail, which can be secured on a basic structure, a centre rail (3), which is retained on the guide rail (4) in a displaceable manner via first rolling bodies (7), which are arranged in a first rolling-body cage (8), and a running rail (2), which is retained on the centre rail (3) in a displaceable manner via second rolling bodies (5), which are arranged in a second rolling-body cage (6), and the centre rail (3) contains an opening for a supporting element (10), which, in a retracted position of the pull-out guide (1), supports the running rail (2) on the guide rail (4), wherein the supporting element (10) is mounted in a lowerable manner on the centre rail (3). It is possible here for at least one second rolling body (5) to travel over the opening for the supporting element (10). This makes it possible to optimize the support of the running rail.

Description

Drawer slide

The present invention relates to a pull-out guide comprising a stationary guide rail which can be fixed to a body, a middle rail which is movably held on the guide rail via first rolling bodies which are arranged in a first rolling body cage, and a middle rail which is held on the guide rail via second rolling bodies which are arranged in a second rolling body cage, movably on the middle rail ne held running rail, and an opening on the middle rail for a support zelement is provided, which supports the running rail on the guide rail in a retracted position of the pull-out guide, wherein the support element is mounted on the central rail lowerable.

EP 2916688 B1 discloses a drawer pull-out guide in which a body rail, a drawer rail and a center rail are provided between the body rail and the drawer rail. To support the La denschiene a support roller is provided, which is arranged between a Horizon talsteg the body rail and an increase in the drawer rail. The support roller enables forces to be transferred from the drawer rail to the cabinet rail. However, there is the disadvantage that the support roller protrudes upward from the center rail, so that the Wälzkör can only be moved a maximum of up to the support roller in the maximum extended position of the pull-out guide, so the length of the track for the rolling elements is limited. As a result, the maximum support distance, ie the distance between the foremost rolling element and the rearmost rolling element, is smaller, which leads to a reduction in the quality of guidance. In addition, the support roller can become jammed.

It is therefore the object of the present invention to provide a pull-out guide with an improved guide for the running rail.

This object is achieved with a pull-out slide with the features of claims 1.

In the pull-out guide according to the invention, the support element arranged on the middle rail between tween the guide rail and the running rail is movably mounted, with an opening on the middle rail for the support element which, in a retracted position of the pull-out guide, the running rail on the Supports guide rail is provided and the support element is mounted on the center rail so that it can be lowered, the opening for the support element being traversable by at least one second rolling element. As a result, the support element can serve to support the running rail on the guide rail in the retracted position and can be lowered when extending in order to be able to use the installation space above the support element. Lowering in the "vertical direction" does not have to take place exactly vertically in the installation position of the pull-out guide, but can also be carried out inclined to the vertical direction, so that when the support element moves, at least a vertical portion of a translational movement is present.

The support element can preferably be moved from a raised position in the pull-in position of the pull-out guide to a lowered position in an extended position of the pull-out guide. In this case, the support element can penetrate an opening in the center rail in the raised position, and in the lowered position an upper side of the support element does not protrude beyond an upper track on the center rail. The top of the support element can thus be arranged in the lowered position either at the same level as the track or lowered below the height of the track. This makes it possible to extend the upper raceway for the Wälzkör by, since they no longer strike the support elements, but the support element can be driven over completely or partially in the lowered position.

In order not to make the movement of the support element abruptly when extending and retracting the pull-out guide, the guide rail has vorzugswei se a bevel to raise or lower the support element. The run-on slope can be linear or curved, the run-on slope preferably being formed by an integrally formed bend or a web on the guide rail.

In a further embodiment, a bearing block is fixed on the center rail, which supports the support element so as to be movable in the vertical direction. The bearing block can have two elongated holes or slot-shaped receptacles into which pegs protruding laterally from the support element engage, so that the two pegs are each guided in a slot or a receptacle in order to mount the support element in a displaceable or movable manner. Such a movable bearing also prevents the support element from jamming. The support element can also be stored in the bearing block without a pin. The upper and the lower opening on the bearing block can be slightly smaller than the diameter of a support roller or the width of a plunger as a support element so that it cannot fall out in the vertical direction. Other guide elements for guiding the support element can also be seen on the bearing block, for example guide webs. The bearing block can be clamped or locked on the middle rail and is therefore easy to assemble. The bearing block could also be formed from the material of the center rail.

The support element is preferably designed as a rotatably mounted support roller. The support roller can optionally be rotatably and displaceably held on the bearing block in order to be able to be moved between the raised and lowered positions. In an alternative embodiment, the Stützele element is designed as a displaceable plunger that can be moved with sliding surfaces along the guide rail and the running rail in order to be raised and lowered.

The middle rail preferably forms an upper raceway for the second rolling elements, which is preferably formed on a horizontally aligned web, the second rolling elements being at least partially movable via an opening through which the support roller extends in the raised position. When the support roller is lowered in the extended position of the pulling guide, the rolling elements can at least partially, preferably also completely, be moved over the opening on the center rail. The second rolling elements are preferably made longer in a horizontal direction perpendicular to the longitudinal direction of the center rail than the opening for the support roller, so that in the area of the opening the rolling elements are supported in the area adjacent to the opening. Optionally, part of the rolling elements can also be moved beyond one end of the center rail in order to increase the maximum support width of the pull-out guide.

The running rail preferably has a downwardly protruding embossing which rests on the support roller in the retracted position. The embossing can be designed in the form of strips in the longitudinal direction of the running rail and includes a run-on bevel in order to ensure that the running rail moves gently onto the support roller.

The invention is explained in more detail below using an exemplary embodiment with reference to the accompanying drawings. Show it: Figure 1 is a perspective view of a pull-out guide according to the invention;

Figure 2 is a perspective exploded view of the pull-out guide of Figure 1;

FIG. 3 shows a perspective view of the pull-out guide of FIG. 1 without a running rail;

Figures 4 and 5 show two detailed views of the pull-out guide of Figure 1 and

2 in the area of the support roller;

FIG. 6 shows a detailed view of the pull-out guide without running rail with lowered support roller;

FIGS. 7A and 7B show two sectional views of the pull-out guide in the area of the support roller in different positions;

FIGS. 8A and 8B an exploded drawing and a view of the central rail and a rolling element cage in an extended position of the pull-out guide, and

FIGS. 9 to 11 show several views of the center rail of the pull-out guide of FIG. 1 when the front rolling body cage is moved over the opening with the support roller.

A pull-out guide 1 comprises a stationary guide rail 4, which can be fixed to a body of a piece of furniture or a household appliance, and on which a central rail 3 can be moved. On the middle rail 3, a running rail 2 is movably held.

As can be seen from FIG. 2, the guide rail 4 has, on a horizontal web, an upper raceway 40 for first rolling elements 7, which are held in a rolling element cage 8. In the exemplary embodiment shown, the rolling elements 7 are designed as cylinders, but can also have a different shape, such as balls or barrels or spherical rollers. Two rolling element cages 8 spaced apart from one another are provided, on each of which rolling elements 7 are held. The rolling elements 7 not only roll on the upper track 40, but also on a vertical web 42 and on egg ner underside of the horizontal web with the track 40.

Second rolling elements 5, which are each held on a rolling element cage 6, can be moved on the center rail 3. Two spaced apart rolling element cages 6 are also provided, with the foremost rolling element 5 of the front rolling element cage 6 and the rearmost rolling element 5 of the rear rolling element cage 6 defining the maximum span. The rolling elements 5 run at least partially on an upper track 30 which is formed on an upper side of a horizontal web of the center rail 3. The middle rail 3 also comprises two lateral webs 31 on which further rolling elements 5 roll in order to ensure lateral guidance. The running rail 2 is supported on the rolling elements 5, which roll on the upper raceway 30.

The rolling elements 5 and 7 can optionally all be constructed identically. However, it is also possible to design individual rolling elements 5 and 7 differently with regard to the material used or the geometry.

In the installed position, weight forces act from an upper web of the running rail 2 on the rolling elements 5, which roll on the upper raceway 30 and thus take over the forces in the vertical direction. The term "vertical" refers to the usual installation situation of the pull-out guide 1, in which the weight forces are transferred via the rolling elements 5 on the track 30 and via the rolling bodies 7 on the track 40, the pull-out guide 1 also being mounted in other positions can be.

At the front end of the center rail 3 there is a support element in the form of a support roller 10 which, in the retracted position of the pull-out guide 1, supports the running rail 2 on the guide rail 4. Furthermore, at least one fixedly positioned roller 9 is rotatably mounted on the central rail 3 and serves to support the running rail 2. The at least one roller is located between the front and rear rolling element cages 6. The rolling element cages 6 and 8 can optionally be connected to one another via synchronization means. The synchronization means can be designed as a cable control or as a gear control with a rack and pinion.

In Figure 3, the retracted position of the pull-out guide 1 without the running rail 2 is shown. It can be seen that the support roller 10 extends through the horizontal web with the track 30 on the center rail 3 and slightly protrudes so that the running rail 2 is supported in the region of an embossing 21 on the support roller 10. In the retracted position, the support roller 10 is supported on the horizontal web with the track 40, so that weight forces can be carried away via the support roller 10 in the front area. In addition, weight forces can be transferred from the running rail 2 via the rolling elements 5 on the two rolling element cages 6, which are arranged at a distance from the support roller 10.

In Figure 4, the front portion of the pull-out guide 1 is shown in a retracted position. It can be seen that a strip-shaped, downwardly formed embossing 21 is arranged above one end of the center rail 3 and is supported on the non-illustrated support roller 10, which in turn is supported on its underside on the track 40 of the guide rail 4. The embossing 21 is formed integrally with the running rail 2 and protrudes downward from a running track 20 on a horizontal upper web of the running rail 2. At one end of the embossing 21, a run-up bevel 22 is formed which runs obliquely to the horizontal and runs onto the support roller 10, it enables.

In FIG. 5, the end area of the pull-out guide is shown in the retracted position without the running rail 2. It can be seen that the support roller 10 reaches through a slot-shaped opening 11 on the center rail 3, the opening 11 being formed as an extension of the track 30. Furthermore, an end section of the track 40 on the guide rail 4 is shown, which has an angled web which forms a run-on bevel 41 for the support roller 10.

In FIG. 6, the support roller 10 is shown in a position that is lowered compared to FIG. 5, in which an upper circumference of the support roller 10 does not protrude beyond the center rail 3.

In FIG. 7A, the pull-out guide 1 is shown in section in the region of the support roller 10. The support roller 10 rolls on the running surface 40 of the guide rail 4 and is arranged in the raised position. The support roller 10 has protruding pins 12 on opposite sides, which can be lowered in egg nem upwardly open slot 14 or in a receptacle, the slots 14 being formed on a bearing block 13 which is fixed to the middle rail 3 with. As a result, the support roller 10 can move in a lowerable manner and is guided in the slot 14 with play. As the comparison of FIGS. 7A and 7B shows, during the extension movement of the pull-out guide, the support roller 10 is moved along the track 40 until the support roller 10 reaches the bent web with the bevel 41. Then the support roller 10 is moved from the raised position into the lowered position due to the force of gravity, so that the pins 12 are moved downwards within the slot 14. In the lowered position, an upper circumference of the support roller 10 is located below the track 30 on the central rail 3.

In FIG. 8A, the middle rail is shown at the front end section with the support roller 10 and a rolling element cage 6. The central rail 3, which is essentially bent in a U-shape from sheet steel, comprises a rectangular opening 11 in which the support roller 10 is arranged. At the opening 11, a bearing block 13 is fixed, which is clamped or latching mounted on the opening 11 via webs 15 in order to mount the support roller 10 so as to be movable in the vertical direction. In the case of a clamping fixation, the webs 15 can serve as insertion limiters so that the bearing block does not engage in the upper raceway. The laterally protruding pins 12 can be inserted into the two slots 14 or receptacles on the bearing block 13.

As shown in FIG. 8B, the cylindrical rolling elements 5 can move on the upper track 30 of the center rail 3 up to the support roller 10. The rolling elements 5 are formed longer than the opening 11 in a horizontal direction perpendicular to the longitudinal direction of the center rail 3. The rolling elements can, for example, be at least twice as long. The opening 11 is rectangular, and its longitudinal direction is aligned approximately parallel to the longitudinal direction of the center rail 3.

The opening 11 in the center rail 3 with the bearing block 13 and the rotatably and lowerably mounted support roller 10 together result in a bearing point for the support arrangement.

In FIG. 9, the center rail 3 is shown together with the front rolling element cage 6, the rolling elements 5 being moved along the upper raceway 30 of the center rail 3. The support roller 10 is already in the lowered position and does not protrude beyond the raceway 30. As a result, the rolling elements 5 can be moved in the area of the opening 11, as shown in FIG. In FIG. 10, the foremost rolling element 5 has reached a front end of the raceway 30. The weight forces can thus are transferred from the foremost rolling element 5 to the raceway 30. The opening 11 is completely covered by the rolling elements 5 and the rolling element cage 6.

It is optionally possible to move the rolling element cage 6 even further in the extension direction in the maximally extended position of the running rail 2, which is shown in FIG. Then the foremost rolling element 5 no longer rests on the raceway 30, but protrudes freely. The weight forces of the running rail 2 are then transmitted to the raceway 30 via another rolling element 5. By this measure, the maximum span between tween the foremost rolling element on the front rolling element cage and the rearmost rolling element 5 on the rear rolling element 5 can be increased somewhat.

In the illustrated embodiment, the center rail 3 is bent in the wesentli Chen U-shape. It is of course also possible to manufacture the pull-out guide 1 from rails that have a different cross-sectional geometry.

The run-up bevel 22 on the embossing 21 and the run-up bevel 41 on the guide rail 4 are directed inclined to the horizontal in the installed position and can be modified with regard to the length and the pitch angle.

Instead of the support roller 10, the Stützele element can also be designed as a displaceable plunger in an alternative embodiment, which can be moved along the guide rail and the running rail with sliding surfaces in order to be raised and lowered.

List of reference symbols

1 drawer slide

2 running rail 3 middle rail

4 guide rails

5 rolling elements

6 rolling element cage

7 rolling elements 8 rolling element cage

9 roller

10 support roller

11 opening

12 pins 13 bearing block

14 elongated hole

15 bridge

20 career

21 Embossing 22 bevel

30 career

31 bridge

40 career

41 bevel 42 vertical web

Claims

Expectations

1. Pull-out guide (1), comprising: a) a stationary guide rail (4) which can be fixed to a body; b) an intermediate rail (3) held movably on the guide rail (4) via first rolling elements (7) which are arranged in a first rolling element cage (8); c) a running rail (2) held movably on the middle rail (3) via second rolling elements (5) which are arranged in a second rolling element cage (6), wherein d) an opening on the middle rail (3) for a support element (10) ) is provided that in a retracted position of the pull-out guide (1) the running rail (2) is supported on the guide rail (4), and e) the support element (10) is mounted on the central rail (3) so that it can be lowered, characterized in that the Opening for the support element (10) can be passed over by at least one second rolling element (5).

2. Pull-out guide according to claim 1, characterized in that the support element (10) can be moved from a raised position in the retracted position of the pull-out guide (1) to a lowered position in an extended position of the pull-out guide (1).

3. Pull-out slide according to claim 2, characterized in that the support element (10) in the raised position passes through an opening (11) in the central rail (3) and in the lowered position a Obersei te of the support element (10) does not have an upper raceway (30) the middle rail (3) protrudes.

4. Pull-out slide according to one of the preceding claims, characterized in that the guide rail (4) has a run-on slope (41) for raising or lowering the support element (10).

5. Pull-out slide according to one of the preceding claims, characterized in that a bearing block (13) is fixed on the central rail (3), which supports the support element (10) so that it can be lowered and moved.

6. Pull-out guide according to claim 5, characterized in that the bearing block (13) has two slots (14) or elongated receptacles in which engage pegs (12) protruding laterally from the support element (10).

7. Pull-out slide according to claim 5 or 6, characterized in that the bearing block (13) on the central rail (3) is fixed in a clamping or latching manner or is formed integrally from the central rail.

8. Pull-out slide according to claim 5, characterized in that the bearing block (13) is arranged at a distance from the upper runway (30) of the center rail (3) in one spatial direction.

9. Pull-out guide according to one of the preceding claims, characterized in that the center rail (3) forms an upper raceway (30) for the second rolling elements (5) and the second rolling elements (5) are at least partially movable via an opening (11) , which is penetrated by the support roller (10) in the raised position.

10. Pull-out slide according to one of the preceding claims, characterized in that the second rolling elements (5) in a horizontal direction perpendicular to the longitudinal direction of the central rail (3) are longer than the opening (11) for the support element (10).

11. Pull-out slide according to one of the preceding claims, characterized in that the running rail (2) has a downwardly protruding de embossing (21) which rests in the retracted position on the support element (10).

12. Pull-out slide according to claim 10, characterized in that the embossing (21) is formed in the form of a strip in the longitudinal direction of the running rail (2) and has a bevel (22).

13. Pull-out slide according to one of the preceding claims, characterized in that the support element (10) is designed as a rotatably mounted support roller.