EP2904939B1 - Device for guiding a push member and piece of furniture with such a device - Google Patents

Description

State of the art

In the furniture sector or in particular in kitchen furniture devices for guiding a push element such as a drawer are known. In so-called full extension with mutually displaceable rails a fixed or support rail is attached to a fixed position counter section or an inner wall portion such as a side wall of a kitchen appliance or a carcass wall of a furniture body. On the fixed rail, a middle rail and on the center rail a connectable to the push element pull-out rail is added. Between the fixed rail and the middle rail and between the middle rail and the pull-out rail there are load-transferring bearing means for movably supporting the rails relative to one another. With the bearing means is a quiet and low-friction linear displacement movement of the middle and the extension rail over the entire extension or Ausziehlänge, which can be bridged with the device in both Verschieberungen.

In the kitchen furniture sector guide devices such. B. full extracts on the one hand meet complex requirements and on the other hand be compact and durable reliable or particularly user-friendly design. This applies in particular to guides for, for example, baking or grill ovens, refrigerators or freezers.

The US 5,733,026 A relates to a drawer slide formed by cold rolling a metal strip.

Purpose and advantages of the invention

The object of the present invention is to provide initially mentioned devices or corresponding furniture in terms of a technically and economically advantageous manner, in particular with regard to a compact and user-friendly design for different purposes.

This object is solved by the independent claims.

The dependent claims address advantageous embodiments of the invention.

The invention is initially based on a device for guiding a push element, which is movably received with the device on a wall portion, wherein the device comprises a fastened to the wall portion carrier rail, a drawer assignable drawer rail and acting between the drawer rail and the support rail center rail comprises, and load-transmitting bearing means for movably mounting the rails are present to each other to allow a sliding movement of the rails over a length of extension of the rails.

The core of the invention is that the load-transferring bearing means have at least three bearing rollers acting between the support rail of the middle rail, each having a concave bearing surface, and between the center rail and the drawer rail rolling bearing elements with bearing surfaces, wherein a load transfer of the bearing means takes place on the bearing surfaces, and wherein for the sliding movement of the rails via a drive unit drivable drive element is present such that in the drive state, the driven drive element acts on the center rail and the center rail is movable in a direction of displacement, wherein the pull-out rail in the Moving direction moved. The device according to the invention is compact or space-saving formable, reliable in function and also user-friendly. A person does not have to apply significant force to move or push the pusher.

This is particularly advantageous for pushers, which are present at a height that are difficult to access for a person, which complicates the manual extraction and insertion.

The proposed device is also particularly advantageous in ovens, as pulling out and pushing regularly dangerous or carries a risk of burns, since the pusher as a food support or the load on the pusher is relatively hot and inside the oven or a baking muffle in Baking operation also high temperatures prevail, so that you can pull out or insert the push element only with protective measures or at an increased risk of injury, if no drive unit for driving the pusher is present. This is avoided according to the invention.

Furthermore, the device according to the invention is comparatively space-saving, which is particularly advantageous with respect to a maximum usable width of the thrust element transversely to the extension direction, since the usable width of the thrust element compared to known otherwise comparable arrangements is increased provided.

For triggering and operating the device or the drive unit and their controlled operation, in particular operating means and a control unit are present, for example, with a computer unit and an operating program.

The rolling bearing elements advantageously have a convex bearing surface, for example spherical or cylindrical rolling bearing bodies.

The drive element may be a rotatably driven drive element, such as a wheel or a roller for a friction drive or a drive with other transmission means such. B. a gear which interacts with a counter-toothed portion.

Advantageously, the carrier rail has a length in the direction of displacement of the device, which is significantly less than a length of the middle rail, in particular about 50% or about 30% of the length of the middle rail.

Advantageously, the drive element is received on the carrier rail. This is advantageous for construction or assembly. Advantageously, a rotational axis of the rotationally driven drive element is aligned parallel to the bearing roller axes of rotation.

Advantageously, the drive element is rotatably mounted on the support rail via a bearing assembly such as a rolling bearing assembly with existing between bearing rings rolling bearing bodies. Such bearings are available in particular as a standard product in heat-resistant versions, whereby a reliable or durable application is also possible for ovens.

Further, it is advantageous that a web portion is formed on the center rail, the outside has a first tread and inside a second tread, the first tread and the second tread are spaced apart by the material thickness of the web portion, wherein the drive element with the inside second Tread cooperates. This is particularly compact. In addition, a useful in the state horizontally oriented web portion on the center rail usually especially over the entire or substantial length of the center rail can be readily formed. As a rule, a free space adjoins the web section, in which the drive element can be positioned in an engaging manner. The Drive element is preferably arranged adjacent to the rollers.

The web portion, via which the drive effect of the drive element can be transferred to the center rail, may be formed comparatively narrow in the longitudinal direction of the device, for example a few millimeters wide. This is sufficient for a drive transmission by means of the drive element.

Advantageously, the surface shape and / or condition of the second running surface and a peripheral contact region of the drive element are matched to one another, whereby via the contact region of the drive element, an action of the drive element on the web portion.

It is also advantageous that the center rail and the load-transmitting bearing means are tuned such that upon a sliding movement of the rails, the bearing rollers on the concave bearing surface with a portion of the inner side second tread cooperate and roll the rolling bearing elements on a portion of the outside first tread. This is constructively advantageous overall and space-saving.

In particular, the at least three bearing rollers are formed identical to one another, wherein the concave bearing surface of the respective bearing roller at corresponding portions of the second tread is in abutment. The second running surface is correspondingly convex for optimized interaction with the bearing rollers. The concave shape of the bearing surface of the bearing rollers and the convex shape of the second tread are particularly matched to match.

The rolling bearing elements accordingly have a convex bearing surface, wherein the outer side first running surface has a correspondingly concave surface shape.

It is also proposed that the middle rail related to a horizontal use state has an upper web portion and an opposite lower web portion, wherein between the two web portions, an area is provided, in which the drive element is provided. The drive element is received on the carrier rail and projects into the region between the web sections. This likewise space-saving arrangement is to be understood such that in the vertical region extending over the length of the web sections or the middle rail, the intermediate region remains free of sections of the center rail or the carrier rail. The vertical height of the area is determined by the distance of the web portions, which corresponds in particular substantially to the height of the center rail. The width of the web sections or their extension in the horizontal direction can be just so great that the drive element or the bearing rollers find space in the width. The width of the drive element is z. B. a few millimeters. The area between the web sections is advantageously open towards the carrier rail, wherein the center rail is modeled in the basic form of a U-shaped profile with a connecting portion and angled thereon protruding flanks, which form the opposite web portions.

An advantageous modification is characterized in that the at least three bearing rollers are present in the region between the two web sections. The bearing rollers are arranged on the support rail and protrude into the intermediate region between the two web sections. Advantageously, the dimensions of the at least three bearing rollers approximately correspond to the dimensions of the drive element. Advantageously, the drive element is present in a central region of the carrier rail, based on the length of the carrier rail, whereas the three or more bearing rollers distributed over the carrier rail length are in particular uniformly spaced from each other.

It is also advantageous that for the transmission of the sliding movement between the middle rail and the Pull-out rail acting Zugmittelanordnung with a flexible tension element is present. Advantageously, the Zugmittelanordnung space-saving and stable ausbildbar.

Advantageously, a position of the tension element or its two ends fixed in position fixed in particular on the support rail and connected at another point of the tension element with the pull-out rail.

It is also proposed that the tension element interacts with the carrier rail and the pull-out rail in such a way that, in the case of a driven middle rail, a transmission of the displacement movement takes place from the middle rail to the pull-out rail.

The transmission of the displacement movements of the center rail on the elevator rail is reversible in both Verschieueberungen. Advantageously, transmits in a non-driven movement, for example in a failure or a passivation of the drive unit, for example, when the pusher is manually pulled out and / or inserted, the Zugmittelanordnung the movement of the pusher and thus the pull-out rail on the center rail.

A further preferred embodiment of the invention is characterized in that the traction means arrangement comprises two deflection elements for a deflection of the tension element guided around the deflection elements. The deflection elements are, in particular deflection rollers or the like, wherein at each deflection roller, the tension element along a radius is deflected in particular by 180 degrees. Between the two pulleys, a parallel aligned partial length of the tension element extends. The tension element is in particular a thin flexible band or cylindrical element.

Advantageously, the two deflecting elements are present on the middle rail. In particular, a deflecting z. B a pulley in the longitudinal direction at a front and a rear end of the center rail. A deflecting element is in particular a rotatable roller or the like, over whose example, approximately half the circumference of the tension element is guided in a loop.

With a deflection element deflected about two deflection elements, the extension movement of the center rail can advantageously be translated to the extension movement of the extension rail. Thus, the extension rail can extend or retract twice as far as the middle rail at the same time intervals. Conversely, the center rail sets back only halfway, compared with the path traveled by the pull-out rail in the direction of displacement.

It is also advantageous that the drive unit is spaced from the drive element via a connecting section in such a way that a distance can be bridged over the connecting section which is equal to or greater than a material thickness of the wall section to which the carrier rail can be mounted. The distance can be z. B. are bridged by a shaft portion in the direction transverse to the direction of displacement of the sliding movement of the rails, z. B. from a driven-side shaft portion of the drive unit. The connecting portion may, for. B. sealed pass through a hole through the wall portion. Thus, for example, in ovens, the drive unit against extreme heat effects by the prevailing inside the oven muffle in the cooking or baking operation temperatures be protected.

The invention also relates to a piece of furniture with a wall section on which a pusher element is slidably received, wherein a device according to one of the above embodiments is present. Thus, the advantages discussed above on the furniture, in particular a kitchen furniture such as an oven can be realized.

Advantageously, the device is designed in particular heat-resistant. So far, there are on baking ovens or corresponding furniture on the opposite side wall sections side rails, in which a Rail guide z. B. a full extension of the pusher or a food support or the food support is placed alone. With the device according to the invention can be dispensed with the side rails, which valuable space in the width is saved, which is currently occupied by the side rails. According to the carrier rail is mounted to save space directly on the side wall portion or laterally on the baking muffle side wall.

figure description

Figur 1

eine perspektivische Ansicht einer erfindungsgemäßen Vorrichtung ohne Antriebseinheit im zusammengeschobenen Zustand,

Figur 2

die Vorrichtung gemäß Figur 1 im Schnitt entlang der Linie A-A in Figur 1,

Figur 3

eine Stirnansicht der Vorrichtung gemäß Figur 1 mit einer Antriebseinheit im montierten Zustand an einem Wandabschnitt und

Figur 4

die Anordnung gemäß Figur 3 perspektivisch schräg von oben, wobei Elemente transparent dargestellt sind.

Further features and advantages of the invention are explained in more detail with reference to a schematically illustrated embodiment of the invention. In detail shows:

FIG. 1

a perspective view of a device according to the invention without drive unit in the collapsed state,

FIG. 2

the device according to FIG. 1 in section along the line AA in FIG. 1 .

FIG. 3

an end view of the device according to FIG. 1 with a drive unit in the mounted state on a wall section and

FIG. 4

the arrangement according to FIG. 3 in perspective obliquely from above, wherein elements are shown transparent.

FIG. 1 shows a trained as a full extension 1 device according to the invention, in the fully collapsed state in perspective obliquely from above. The full extension 1 is advantageously designed for displaceable movement of a pushing element, not shown, for example, a food support such as a baking tray or a storage grid of a baking oven.

For a linear horizontal sliding movement of the food support it is necessary on both sides attacking two laterally correct full extension according to the basic structure of the full extension 1 necessary, which are accommodated on respective opposite side walls of a baking muffle of the oven.

The food support accommodated between the side walls of the baking muffle with the full pull-outs can be moved out of the baking muffle and pushed back in, with the full-length extensions telescopically extending or shortening in the same way.

The full extension 1 comprises three each consisting of a sheet metal rail body with a comparatively short on a vertical side wall 23 of the baking muffle firmly positionable support rail 2, a thrust member assignable slide rail 4 and acting between the support rail 2 and the drawer rail 4 center rail 3. The support rail is advantageously mounted in the front region of the baking muffle on the side wall 23 or near a baking muffle opening. Between the pull-out rail 4 and the middle rail 3 act for sliding guide on the extension length of the rails first load-bearing bearing means, which are designed as rolling bearing elements 6 and 5 recorded on a roller carriage or a movable in the direction P1 and P2 rolling bearing cage.

The rolling bearing elements 6 are formed as mutually identical rolling bearing balls 7 and positioned with the rolling bearing cage 5 to each other consistently. Between the pull-out rail 4 and the middle rail 3 act in the illustrated embodiment ten upper rolling bearing balls 7 in the upper part of the full extension 1 and another ten lower bearing balls 7 in the lower part of the full extension. 1

The carrier rail 2 comprises a flat sheet metal section 8 with an upper web 8a and a lower web 8b.

At the upper web 8a four in the direction of the center rail 3 projecting and spaced in the longitudinal direction of the support rail 2 bearing bolts 10 are provided, which serve for the rotatable mounting of mutually uniform load-bearing bearing means or two upper bearing rollers 11 and two lower bearing rollers 12 on the support rail 2. The bearing rollers 11, 12 have circumferentially continuously a concave bearing surface 13. At the center rail 3, a horizontally oriented upper web portion 14 and a horizontally oriented lower web portion 15 is present. The upper bearing rollers 11 with their bearing surface 13 roll on the upper side on an inside convex running surface 14b of the upper web portion 14 from. Below the bearing rollers 11, a distance to the lower web portion 15 is present, so that the bearing rollers 11 are not affected or blocked when rolling on the upper web portion 14.

The lower bearing rollers 12 with their bearing surface 13 roll on the underside on an inside convex running surface 15 a of the lower web portion 15 from. Above the lower bearing rollers 12, a distance from the upper web portion 14 is present, so that the bearing rollers 12 when unrolling at the lower web portion 15 also not affected or blocked. For positioning of the bearing rollers 11 and 12, the associated bearing pin 10 are offset vertically corresponding to the upper web 8a.

In addition, in the longitudinal direction of the support rail 2 between the two lower bearing rollers 12 centered a drive wheel 9 with a journal 9a available. The drive wheel 9 is rotatably supported via a heat-resistant rolling bearing 26 via the axle journals 9a which project away from the center rail 3. For this purpose, a bearing seat is formed on the upper web 8a. The area of the free end of the axle journal 9a with the roller ball bearing 26 is protected to the outside via a detachably fixable cover 27. The drive wheel 9 with the journal 9a has a central passage opening 28, in which a in FIG. 2 not shown connection section rotatably engaged with the rotary drive of the drive wheel 9, wherein the connecting portion is rotatably connected to an output side drive shaft 25 of a drive motor 24, via which the drive wheel 9 either in one of two directions of rotation about the axis of rotation D of the drive wheel 9 and thus the center rail 3 in the directions P1 or P2 is drivable. The drive shaft 25 can also engage directly in the passage opening 28 rotatably.

The upper web section 14 has, opposite the inner running surface 14b and spaced apart by a material thickness of the web section 14, an outer running surface 14a on which the upper rolling bearing balls 7 roll. Accordingly, the lower web portion 15 of the inner side tread 15a opposite and spaced by a material thickness of the web portion 15 has an outer side tread 15b on which the lower rolling bearing balls 7 roll. The upper and lower bearing balls 7 roll in addition to above each one of the rolling bearing balls 7 partly encompassing edge portion of the drawer rail 4 from.

For the transmission of the drive motor 24 driven displacement movement of the center rail 3 on the slide rail 4, a traction means 16 is provided with a flexible loop-shaped tension member 17. For this purpose, the tension element 17 is guided around two deflecting elements or deflecting rollers 18 and 19 in each case deflected by 180 degrees. Both deflecting rollers 18, 19, which are each rotatable about a vertical axis, are provided on the middle rail 3 at a front and a rear end, respectively.

The tension element 17 is fixed on the one hand to the support rail 2, fixed for example with a Zugelement end front on the support rail 2 and the other Zugelement end behind the support rail 2.

On the other side between the middle rail 3 and the roller bearing cage 5 and the slide rail 4 runs the Tension element 17 in a narrow intermediate region and is fixed there to a clamping member 20, wherein the clamping member 20 is fixed in the rear region of the drawer rail 4.

If the middle rail 3 is moved in the direction P1 or P2, the pull-out rail 4 is also displaced in the same direction by twice the travel via the traction mechanism arrangement 16, compared with a movement path of the middle rail 3.

If the middle rail 3, for example, starting from the fully inserted state according to FIG. 1 pushed out in the direction of P1, the two deflection rollers 18, 19 move accordingly in the direction P1. In this case, the location of the tension element 17, which is fixed to the clamping element 20 of the drawer rail 4, also moves in the direction P1, so that the drawer rail 4 is moved in the direction P1 due to the movement of the center rail 3 and additionally the tension element 17, but to the to the middle rail 3 way double way.

When the inserted middle rail 3 is driven in the direction P2, the moved-out drawer rail 4 is inserted again accordingly.

The full extension 1 is fastened to a baking muffle wall 22 via the carrier rail 2, for example via the web 8b. In a lateral space 21 between the baking muffle wall 22 and a side wall 23 of a furniture body, in which the associated oven is housed, the drive motor 24 is protected against direct heat by high temperatures inside the baking muffle.

LIST OF REFERENCE NUMBERS

1

full extension

2

support rail

3

middle rail

4

pull-out rail

5

Rolling bearing cage

6

Roller bearing element

7

Rolling ball

8th

sheet metal section

8a, 8b

web

9

drive wheel

9a

journal

10

bearing bolt

11

bearing roller

12

bearing roller

13

storage area

14

web section

14a

tread

14b

tread

15

web section

15a

tread

15b

tread

16

traction mechanism

17

tension element

18

idler pulley

19

idler pulley

20

clamping part

21

free space

22

Oven chamber wall

23

Side wall

24

drive motor

25

drive shaft

26

rolling ball bearings

27

cover

28

Through opening

Claims (12)

1. Device (1) for guiding a push member, which can be mounted displaceably by the device (1) on a wall section (23), wherein the device (1) comprises a support rail (2) securable to the wall section (23), a pull-out rail (4) assignable to the push member and a central rail (3) acting between the pull-out rail (4) and the support rail (2), and load-transferring bearing means for movably supporting the rails (3, 4) relative to one another are provided to enable a displacement movement of the rails (3, 4) over an extension length of the rails (3, 4), wherein the load-transferring bearing means comprise at least three bearing rollers (11, 12) operating between the support rail (2) and the central rail (3) each with a concave-shaped bearing surface (13) and between the central rail (3) and the pull-out rail (4) comprise roller bearing elements with bearing surfaces, wherein there is a load transfer of the bearing means over the bearing surfaces (13), and wherein for the displacement movement of the rails (3, 4) a drive element (9) driven by a drive unit (24) is provided such that in the drive state the driven drive element (9) acts on the central rail (3) and the central rail (3) can be moved in a displacement direction, wherein the pull-out rail (4) also moves in displacement direction.
2. Device according to claim 1, characterised in that the drive element (9) is mounted on the support rail (2).
3. Device according to claim 1 or claim 2, characterised in that on the central rail (3) a web section (14) is formed which has on the outside a first running surface (14a) and on the inside a second running surface (14b), wherein the first running surface (14a) and the second running surface (14b) are spaced apart from one another over the material thickness of the web section (14), wherein the drive element (9) interacts with the inner second running surface (14b).
4. Device according to any one of the preceding claims, characterised in that the central rail (3) and the load-transmitting bearing means are adjusted such that with a displacement movement of the rails (3, 4), the bearing rollers (11, 12) interact over the concave bearing surface (13) with a section of the inner second running surface (14b, 15a) and the roller bearing elements roll on a section of the outer first running surface (14a, 15b).
5. Device according to any one of the preceding claims, characterised in that the central rail (3) relative to a horizontal position of use comprises an upper web section (14) and an opposite lower web section (15), wherein an area is provided between the two web sections (14, 15) in which the drive element (9) is provided.
6. Device according to any one of the preceding claims, characterised in that in the area between the two web sections (14, 15) the at least three bearing rollers (11, 12) are provided.
7. Device according to any one of the preceding claims, characterised in that for the transfer of the displacement movement a pulling means arrangement (16) acting between the central rail (3) and the pull-out rail (4) is provided with a flexible pulling element (17).
8. Device according to any one of the preceding claims, characterised in that the pulling element (17) cooperates with the support rail (2) and the pull-out rail (4) such that with a driven moving central rail (3) the displacement movement is transferred from the central rail (3) to the pull-out rail (4).
9. Device according to any one of the preceding claims, characterised in that the pulling means arrangement (16) comprises two deflecting elements (18, 19) for deflecting the pulling element (17) guided around the deflecting elements (18,19).
10. Device according to any one of the preceding claims, characterised in that the two deflecting elements (18, 19) are provided on the central rail (3).
11. Device according to any one of the preceding claims, characterised in that the drive unit (24) is spaced apart from the drive element (9) by a connecting section (25) such that a distance can be bridged by the connecting section (25) which is the same or greater than a material thickness of the wall section (23) on which the support rail (2) can be mounted.
12. Piece of furniture comprising a wall section (23), on which a push member is mounted to be displaceable, wherein a device (1) is provided according to any one of the preceding claims.

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