EP2046164A2 - Pull-out guide for guiding furniture parts - Google Patents

Abstract

The invention proposes a pull-out guide (1) for guiding furniture parts, having a basic-structure rail (2) and a pull-out rail (3) as well as a central rail (4) which is mounted in a displaceable manner between the basic-structure and pull-out rails (2, 3). Bearing elements are arranged between the basic-structure rail (2) and the central rail (4) and between the pull-out rail (3) and the central rail (4). Also provided is a control bearing unit (12) which acts between the basic-structure rail (2) and the pull-out rail (3). According to the invention, the control bearing unit (12) comprises an elastic bearing body (14) and a comparatively hard bearing body (15). The pull-out guide (1) is designed such that the hard bearing body (15), in the pushed-in state of the pull-out guide (1), is not exposed to forces from at least one of the basic-structure and pull-out rails.

Description

"Pull-out guide for guiding furniture parts"

The invention relates to a pull-out guide for guiding furniture parts according to the preamble of claim 1.

State of the art

Pull-out guides of furniture parts, in particular with so-called middle rail, which is a full extension of e.g. Allow drawers are already known in various embodiments.

From the German patent application DE 33 46 797 Al a device for the sliding of roll-extendable elements of furniture is known. The device consists of three guide parts:

A fixed to be mounted on the furniture, a sliding to be attached to the extendable element guide and an intermediate guide. The intermediate guide includes a roller, in a gap between the fixed to be attached to the furniture and the sliding to be attached to the extendable member guide, which is simultaneously in contact with the fixed guide and the movable guide. The roller causes, dragged by the friction of the movable guide at their movement in relation to the fixed leadership the shift of the intermediate leadership. She presses on a rear or front edge of the intermediate guide.

Purpose and advantages of the invention

The invention has for its object to improve a pull-out with a center rail between a fixed rail and attached to the extendable element rail with regard to the synchronization of the rail parts.

This object is solved by the features of claim 1.

In the dependent claims advantageous and expedient developments of the invention are given.

The invention relates to a pull-out guide for guiding furniture parts, in particular drawers with a carcass rail for mounting on a stationary furniture part, e.g. a drawer body, a pull-out rail for mounting on a furniture part to be pulled out, e.g. a drawer and a center rail, which is displaceably mounted between the carcass and pull-out, from, to allow a comparatively wide excerpt, preferably full extension of the drawer rail with respect to the carcass rail. Between the carcass rail and the middle rail and the pull-out rail and the middle rail rolling bearing elements are arranged, in particular in bearing cages mounted balls or rollers or rollers. In addition, a control bearing unit is provided which acts between the carcass rail and the slide rail, so as to tune the movement of the center rail to the slide rail.

The essence of the invention is that the control bearing unit a deformable elastic, soft rolling bearing body and a comparatively hard, hardly or not deforming in normal operation, rolling bearing body comprises, wherein the pull-out is designed such that only the hard bearing body in the retracted state of the pull-out guide with respect to forces of at least one rail of carcase and pull-out rail is.

This can be provided with the soft bearing body a kind of "basic control" for the movement of the center rail, due to the fact that the soft bearing body is constantly in engagement between the carcass and pull-out rail.

Preferably, the hard bearing body is free in relation to the body and pull-out rail.

The hard bearing body can absorb comparatively large bearing forces during the extension. Due to the release, however, a deformation of the hard bearing roller due to forces acting between the carcass and the pull-out rail, in particular at e.g. high loads in a drawer, avoided in the retracted state of the pull-out. Such forces are absorbed by the other bearing elements between the rails. The hard bearing body thereby retains e.g. its original roll shape over a long period of use, with the result that the extraction process does not deteriorate in quality.

As a bearing body of the control bearing unit are in particular roles or rollers into consideration. However, spherical bearing bodies can also be used.

In particular, the soft bearing roller should have a connection to the center rail to achieve a desired synchronization - A -

to effect the middle rail and pull-out rail in relation to the carcass rail. To realize an advantageous control effect of the soft bearing body is also proposed that the soft bearing body is more than 0.2 mm larger than a clear width of a channel between the carcass and pull-out rail in which the bearing body rolls.

In a preferred embodiment of the invention, the control-bearing unit is mounted on the center rail. In this context, it is also advantageous if the soft and the hard bearing body are arranged on an axis which is preferably fixed to the center rail. Thus, the component cost can be optimized.

The diameter of the hard bearing body is preferably about 0.1 mm larger than the channel between the body and pull-out rail in which the bearing body rolls. This achieves a "tight" largely play-free guidance between the rails.

In a further preferred embodiment of the invention, a recess in the carcass and / or pull-out rail is provided for the release of the hard bearing body. The recess should be arranged on at least one of the rails, that in the inserted state, the recess is above or below the hard bearing body, so that the bearing body is free at this point without contact.

It is preferred if two recesses are provided such that they overlap in the retracted state of the pull-out guide. Conveniently, the hard bearing body is then arranged in the overlapping area, so that it is non-contact to the carcass and pull-out rail.

Furthermore, it is preferred if the bearing axis of both the soft and the hard bearing body is horizontal. In this way, the hard bearing body can effectively absorb weight forces from the furniture part to be pulled out.

In order to achieve an improved synchronization between the center rail and the carcass or pull-out rail, it is also proposed that on at least one of the carcass and pull-out rail on a runway of the soft bearing body, in the area in which the hard bearing body is still free, a Surface is present with an increased liability compared to the remaining runway. For example, a toothing, Riffeiung, transverse groove or other roughened surface is formed in this runway area. Also conceivable are differently rubberized surfaces. Preferably, such a surface is present both on the pull-out rail and on the carcass rail. Thus, an undesirable offset of the center rail to the carcass or pull-out rail when pulling out is substantially avoided.

drawings

An embodiment of the invention is illustrated in the drawings and explained in more detail below, indicating further advantages and details. Show it

Figure 1 is an inventive

Drawer extension in a slightly open position in a side view,

Figure 2 is a section through the

Drawer extension according to FIG. 1 along the section line JJ in FIG. 1, 3 shows a section along the section line through the drawer guide according to the section line KK in Figure 2,

Figure 4 is an enlarged view of the rectangular portion L in Figure 3 and

Figure 5 is a perspective view of a section which corresponds approximately to the area L, in which a part of the components is shown transparently, so that the view is made possible on a control roller unit according to the invention, wherein a nearly closed state of the drawer guide is shown.

Description of the embodiment

In the figures, a drawer guide 1 is shown, which consists of a carcass rail 2, a drawer rail 3 and a middle rail 4. Such a drawer slide 1 is mounted on mounting bracket 5, which are connected to the carcass rail 2, respectively left and right of a drawer on a furniture body. At the drawer rail 3, the drawer is attached.

In Figures 1 to 4, a slightly open state of the drawer slide 1 is shown. To store the drawer rail 3 relative to the carcass rail 2 on the center rail 4 slidably, bearing cages 6 are between the Drawer rail 3 and the middle rail 4 and the carcass rail 2 and the middle rail 4 are arranged. The bearing cages 6 comprise rotatably mounted bearing rollers 7.

In a known manner, the bearing cages 6 in a U-shaped channel 8, 9 of the carcass or drawer rail 2, 3 housed (see in particular Figure 2). On opposite surfaces of the respective U-shaped channel 8, 9, the bearing rollers 7 roll off, wherein between the bearing rollers 7 each an angular portion 10, 11 of the center rail 4 engages.

This already allows a comparatively play-free guidance of the rails 2, 3, 4 to each other. A synchronization of these rails to each other is only inadequately possible with only the bearing cages regularly.

Therefore, a control bearing unit 12 is provided.

The control bearing unit 12 comprises a soft bearing roller on an axis 13 arranged on the middle rail 4

14, which is exemplary in relation to the middle rail inside and a comparatively harder outer bearing roller

15. The soft bearing roller is preferably formed of a deformable elastic soft material, which is not so soft that in the slightly compressed state, no forces between outer surfaces 2a, 3a of the respective U-shaped channel 8, 9 can be transmitted. The soft bearing roller 14 has an oversize of preferably greater than 0.2 mm. With the soft roller 14, a "basic control" between the rails 2, 3, 4 can be provided.

The example here outside lying hard bearing roller 15 also has an oversize, but much lower than the excess of the soft role, and is for example 0.1 mm larger than a clear width a of the channel between the Body rail 2 and the drawer rail 3. As a result, the rails are also slightly braced against each other, so that a "full" leadership is given. With the hard bearing roller 15 bearing forces between the rails 2, 3, 4 can be transmitted.

Preferably, as in the embodiment, the axis 13 of the control bearing unit 12 is aligned horizontally. When pulling out rolls both the soft and the hard roller 15 on the respective outer side 2a, 3a of the carcass rail 2 and drawer rail 3 from. This allows a synchronization between the rails 2, 3, 4 reach.

Both on the carcass rail 2 and on the drawer rail 3, a recess 16, 17 and a toothed region 18, 19 are provided in the present example. The toothed area lies respectively only on the respective track of the soft roller of the carcass rail 2 and the drawer rail 3, whereas the recess is formed only on the respective track of the hard roller 15 on the carcass rail 2 and drawer rail 3. In addition, both the respective toothed region 18, 19 and the respective recess 16, 17 are attached to the carcass rail 2 or drawer rail 3 in such a way that they overlap in the pushed-together state of the drawer guide 1 in the vertical direction. This ensures that the hard roller 15 when pushing the drawer slide 1, ie when inserting a drawer, just before the end position is reached, through the recesses 16, 17, which are slightly wider than the hard bearing roller 15 itself, into "emptiness "and is free. In this area, however, then falls off the synchronization effect of the hard bearing roller 15. However, in order to obtain a secure synchronization of the rails 2, 3, 4 with respect to each other, in particular in this area, the running area of the soft bearing roller 14 is toothed that the soft bearing roller 14 can not slip.

In the present embodiment begins at the point where on the path for the hard bearing roller 15, the respective recess 16, 17 occurs on the path of the soft bearing roller 14 of the respective toothed region 18, 19 (see in particular the perspective view of Figure 5).

In FIGS. 1, 2, 3 and 4, the respective bearing rollers 14, 15 have not yet reached the toothed region 18, 19 or the recesses 16, 17.

In contrast, in FIG. 5, the bearing rollers 14, 15 are already in the respective areas, although the final fully inserted position of the drawer guide 1 has not yet been reached. It can be seen, however, that even with "free" hard bearing roller 15, the soft bearing roller by rolling on the respective toothed portion 18, 19 on the outside 3a and 2a of the cabinet rail 2 can provide a secure synchronization until complete insertion of the drawer slide 1.

In addition, it is ensured by the soft bearing roller 14 that the hard bearing roller 15 is lifted at the transition from the respective recess 16, 17 under safe guidance of the rails to each other on the respective path on the carcass rail 2 and drawer rail 3. It is preferred that the recesses 16, 17 are dimensioned in their length so that the hard roller 15 is not lifted simultaneously both on the track on the carcass rail 2 and on the drawer rail 3. This is illustrated in FIG. It can be seen that the hard bearing roller 15 is lifted straight on the path of the carcass rail 2, while still being positioned in the recess 17 of the drawer rail 3. By such staggered lifting the hard bearing roller 15 on the respective running path as uniform as possible extension movement of the drawer slide 1 is achieved.

By the release of the hard roller 15, the occurrence of a "base plate" on the hard role in the inserted state of the pull-out is avoided.

LIST OF REFERENCE NUMBERS

1 drawer slide

2 carcass rail

3 drawer rail

4 middle rail

5 mounting bracket

6 bearing cage

7 bearing roller

8 U-shaped channel

9 U-shaped channel

10 angle section

11 angle section

12 control bearing unit

13 axis

14 soft bearing roller

15 hard bearing roller

16 recess

17 recess

18 toothed area

19 toothed area

Claims

claims 1. pull-out guide (1) for guiding furniture parts with a carcass rail (2) for mounting on a stationary furniture part, a pull-out rail (3) for mounting on a furniture part to be pulled out and a middle rail (4) which is located between the carcass rail and the pull-out rail (3). 2, 3) is arranged displaceably mounted, wherein rolling bearing elements between the carcass rail (2) and the center rail (4) and the slide rail (3) and the center rail (4) are arranged, and wherein a control bearing unit (12) is provided , which acts between the carcass rail (2) and the pull-out rail (3), characterized in that the control-bearing unit (12) has a deformable, elastically soft rolling bearing body (14) and a comparatively hard, in normal operation hardly or not deforming rolling bearing body (15), wherein the pull-out guide (1) is designed such that the hard bearing body (15) in the inserted state with respect to forces is freed from at least one rail of carcass and pull-out rail (2, 3). 2. Pull-out according to claim 1, characterized in that the soft bearing body (14) is more than about 0.2 mm larger than a channel between the body and pull-out rail (2, 3), in which the bearing body (14) rolls. 3. Pull-out according to claim 1 or 2, characterized in that the control-bearing unit (12) on the middle rail (4) is mounted. 4. Pull-out guide according to one of the preceding claims, characterized in that a soft and hard bearing body (14, 15) on an axis (13) is arranged. 5. Pull-out guide according to one of the preceding claims, characterized in that for the release of the hard bearing body (15) has a recess (16, 17) in the body and / or pull-out rail (2, 3) is provided. 6. Pull-out according to one of the preceding claims, characterized in that for the release of the hard bearing body (15) recesses (16, 17) in the body and the pull-out rail (2, 3) are provided such that they are in the retracted state of Overlap pull-out guide. 7. Pull-out guide according to one of the preceding claims, characterized in that on at least one of carcass and pull-out rail (2, 3) on a runway of the soft bearing body (14) in the area in which the hard bearing body (15) is still free , a surface is formed with increased compared to the remaining runway liability.