Flap fitting of an item of furniture

Abstract

The invention relates to a flap fitting (1) having a housing (2) for fastening to a furniture body and a mounting element (9) for fastening a flap allocated to the furniture body, wherein the housing (2) and the mounting element (9) are connected to one another via a lever mechanism (3) which has a plurality of hinged levers which are operatively connected to one another, the housing and the mounting element being able to be moved relative to one another between a closed position and an open position of the flap, wherein the flap fitting is designed such that at least one hinged lever has two equidirectional legs (7, 8) which are arranged at a distance from one another and are connected to one another by connecting elements running transversely to the longitudinal extent, wherein one leg (7, 8) of the hinged lever is longer than the other leg (7, 8) at least on one side, thereby forming a cantilever arm (11, 15), and wherein the cantilever arm (11, 15) has, at its free end, an axle receptacle for forming a hinge axle.

Description

[0001] Flap fitting of a piece of furniture

[0002] The invention relates to a flap fitting for a piece of furniture, comprising a housing for attachment to a furniture body and a mounting element for attaching a flap associated with the furniture body, wherein the housing and the mounting element are connected to each other via a lever mechanism and are movably guided relative to each other between a closed position and an open position of the flap. The lever mechanism includes a functional element, for example a spring assembly, coupled via a transmission lever to provide a driving force for the lever mechanism of the flap fitting and / or a damping element that dampens the movement of the flap into at least one of the end positions.

[0003] Furniture, especially kitchen furniture or home furnishings such as base cabinets or wall cabinets, typically has a front-opening cabinet body to which movable furniture parts are mounted, guided by fittings. The flap fittings allow the flap to swing open, as well as to swing it into a closed position. These fittings are positioned above the top panel of the cabinet body, such that the respective housing is attached to the top panel and / or to the inside of a side panel that extends beyond the top panel.

[0004] The lever mechanism of the flap fitting is usually designed in multiple parts as a multi-jointed lever mechanism and connects the housing articulatedly to a mounting element to which the flap is attached.

[0005] To perform a combined pivoting and sliding movement, 7-joint lever mechanisms are frequently used, as known, for example, from DE 10 2017 126 369 A1. The articulated levers of this lever mechanism are coupled to each other and to the housing via seven pivot axes. The lever mechanism transmits the torque exerted by the flap in an open position to the housing. A force storage device is arranged in the flap fitting, which counteracts the torque in order to hold the flap in the open position.

[0006] German patent DE 10 2022 101 398 A1 describes a lever mechanism designed as a four-joint lever mechanism, pivotally attached to the housing of the flap fitting by two levers. A push rod with an adjustable pivot point engages one of the two levers pivotally attached to the housing. Changing the point of application of the push rod to the lever alters the spring force with which the power storage device acts. The lever on which the power storage device acts is adjacent to the device itself, which is possible with the aforementioned four-joint lever mechanism. However, this is not feasible with more complex lever mechanisms.

[0007] A characteristic feature of the lever arms used so far in the lever mechanism is their mirror-symmetrical design with respect to an imaginary central longitudinal axis, in which two parallel and spaced-apart legs are provided, which have several through-openings running transversely to the imaginary longitudinal axis, for receiving joint axes.

[0008] However, this requires a correspondingly large installation space, which prevents additional space utilization. Furthermore, the lever mechanism can only be manufactured with a correspondingly high material input, which hinders cost optimization. Additionally, tolerances can lead to stress in the lever arm between two pivot axes.

[0009] The lever arms of the known lever mechanism are subjected to different loads in the area of ​​the joint axes, so that there are joint axis areas that are over-dimensioned due to the longitudinally symmetrical design.

[0010] The invention is based on the objective of further developing a flap fitting of the generic type in such a way that the required installation space of the lever mechanism is minimized and the load-bearing capacity of the articulated levers of the lever mechanism is optimized.

[0011] This problem is solved by a flap fitting with the features of claim 1.

[0012] This design of the lever mechanism of the flap fitting results in a significant improvement over the prior art. The longer leg, forming a cantilever arm, allows for the alternative use of free space, with this cantilever arm having a through-opening in which an axle bolt is mounted, connecting it to another hinge lever or a fixed element of the flap fitting.

[0013] The purpose of the through-hole is to provide a mounting point for an axle, enabling the formation of a joint connection to another articulated lever. Alternatively, a mounting point can also be provided, for example, by a welded stud or by a feature of the material.

[0014] This one-sided support is preferably located in a region of the cantilever arm that only needs to withstand minor forces. The functionally higher load is absorbed in the region where the aligned through-openings of the parallel and spaced-apart legs are located.

[0015] In addition to the load-optimized design of at least one joint lever, material savings are also achieved by foregoing an extension of the second leg, which not only leads to cost savings but also to a weight reduction that meets the constant demands for it.

[0016] The one-sided leg extension prevents tension caused by tolerances between the pivot joints, resulting in a smoother overall movement of the lever mechanism, thus facilitating handling, i.e., opening and closing the flap.

[0017] The hinge lever can be manufactured as a sheet metal part, where the opposing legs are the legs of a U-profile, with the cantilever arm forming an extension of one of the two legs. Manufacturing the hinge lever as a sheet metal part is particularly cost-effective, which is significant because flap fittings are used in large quantities as serial components.

[0018] It is also conceivable to construct the lever arm in multiple parts, for example, by manufacturing the individual legs from several plates. The gap between the two opposing legs can be formed by a base plate, or filled with additional plates, which in turn have aligned through-holes for the respective pivot bolts, or be held at a distance from each other by pivot bolts. In a multi-part embodiment, the cantilever arm is formed by at least one plate. The area with the opposing legs has at least one more plate than the cantilever arm. A combination of a symmetrical U-shaped lever and an adjacent, longer plate is also conceivable.

[0019] Depending on the load case, the cantilever can be shaped to increase bending stiffness, for example by means of an angled web, which allows for a minimized material thickness. It is also conceivable to provide the cantilever with a bead and / or a bend or similar feature.

[0020] A particularly advantageous embodiment of the invention provides that the free end of the cantilever arm of a second articulated lever is articulated to the free end of the cantilever arm of a articulated lever.

[0021] Further advantageous embodiments of the invention are characterized in the dependent claims.

[0022] Exemplary embodiments of the invention are described below with reference to the accompanying drawings.

[0023] They show:

[0024] Figure 1 shows a flap fitting not according to the invention in a partially cutaway spatial view.

[0025] Figures

[0026] 2-4 each show a partial section of the flap fitting in a broken perspective view

[0027] figure

[0028] Figures 5a and 5b each show a joint lever according to the invention in different perspective views.

[0029] Figures

[0030] Figures 6a and 6b show embodiments of another joint lever according to the invention in different views.

[0031] Figure 1 shows a flap fitting 1 not according to the invention, with a housing 2 for attachment to a furniture body (not shown). A lever mechanism 3 is positioned in the housing 2, to which a mounting element 9 is connected, which is connected to a flap that closes the access side of the furniture body.

[0032] The flap can be opened and closed via the lever mechanism 3 about an imaginary, horizontally oriented pivot axis that can be adjusted in position. The lever mechanism 3 has several interconnected articulated levers that are linked to each other and are guided to move between a closed and an open position.

[0033] Furthermore, the flap fitting 1 has a power storage device coupled to the lever mechanism 3 via a push rod 10 in order to hold the mounting element 9 in the open position and / or the closed position.

[0034] The lever mechanism 3 has a transmission lever 4 as a hinged lever and a control arm 6 articulated to it, which is connected at its free end, opposite the transmission lever 4, to a fixed part of the flap fitting 1.

[0035] The transmission lever 4 has two parallel and spaced-apart legs 7, between which the control arm 6 is pivotably arranged. The control arm 6 is also provided with two parallel and spaced-apart legs 8, which carry the axle bolts 5 at their free ends.

[0036] Figure 2 shows a partial section of the flap fitting 1 according to the invention. It can be seen that the push rod 10 is guided through the gap formed by the formation of a cantilever arm 15 instead of the continuation of the two legs 8 on the control arm 6, with an angled web 13 being provided to increase the bending stiffness of the cantilever arm 15.

[0037] It can also be seen that the cantilever arm 11 of the transmission lever 4 has a through hole 12 at its end for receiving the axle bolt 5, with the articulated connection between the control arm 6 and the transmission lever 4 being provided in the area of ​​the free ends of the cantilever arms 11, 15.

[0038] Figure 3, like Figure 2, depicts a position in which the flap is closed, as evidenced by the mounting element 9 being in contact with the housing 2. Figure 3 further shows the lever mechanism 3 without the use of the push rod 10. It is thus clearly visible that the transmission lever 4 has two parallel and spaced-apart legs 7, with aligned through-openings 12 in which pivot pins 5 are mounted, which are operatively connected to other linkage levers or the mounting element 9.

[0039] Figure 4 shows a simplified representation of the position of the lever mechanism 3 as it appears when the flap is open and the mounting element 9 is pivoted away from the housing 2. This figure also shows that the cantilever arm 11 of the transmission lever 4 is pivotally connected to the cantilever arm 11 of the control arm 6 via the pivot pin 5.

[0040] The two legs 8 of the control arm 6 are each plate-shaped and are likewise connected to each other by an axle bolt 5 that is secured against displacement. One of the legs 8 is designed as a cantilever arm 15 and is pivotally connected to the cantilever arm 11 of the transmission lever 4 by means of an axle bolt 5, thereby completely preventing any loss of lateral stability that would otherwise occur.

[0041] Another embodiment of the transmission lever 4 is shown in detail in Figures 5a and 5b. The two legs 7 are connected to each other by a base 14, which, due to its shape, has a U-shaped cross-section in some areas.

[0042] Here it can be clearly seen that the through-openings 12 of the two spaced and parallel legs 7 are aligned with each other, so that axle bolts 5 can be easily passed through.

[0043] Figures 6a and 6b show a control arm 6 in different views. It can be seen that the cantilever arm 15 has a through-opening 12, while both legs 8 are provided with directly opposite, aligned through-openings 12. Angled to the cantilever arm 15 and extending towards the opposite leg 8, the web 13 increases the bending stiffness. The end region of the cantilever arm 15 is also cranked towards the opposite leg 8, creating a clearance for the end region of the cantilever arm 11. (Reference symbol list)

[0044] 1 flap fitting

[0045] 2 cases

[0046] 3 lever mechanism

[0047] 4 transmission levers

[0048] 5 axle bolts

[0049] 6 control arm

[0050] 7 thighs

[0051] 8 thighs

[0052] 9 Mounting element

[0053] 10 push rod

[0054] 11 Cantilever

[0055] 12. Passage opening

[0056] 13 Bridge

[0057] 14 Floor

[0058] 15 Cantilever

Claims

- 8 - Claims 1. Flap fitting (1) with a housing (2) for attachment to a furniture body and a mounting element (9) for attaching a flap associated with the furniture body, wherein the housing (2) and the mounting element (9) are connected to each other via a lever mechanism (3) having several articulated levers and being movable relative to each other between a closed position and an open position of the flap, characterized in that at least one articulated lever has two legs (7, 8) arranged in the same direction and spaced apart from each other, which are connected to each other by connecting elements extending transversely to the longitudinal extent, wherein one leg (7, 8) of the articulated lever is longer than the other leg (7, 8) at least on one side, forming a cantilever (11, 15), and wherein the cantilever (11, 15) has an axle receptacle at its free end to form a pivot axis.

2. Flap fitting according to claim 1, characterized in that the free end of the cantilever arm (15) of a joint lever designed as a control arm (6) is articulated to the free end of the cantilever arm (11) of a joint lever designed as a transmission lever (4).

3. Flap fitting according to claim 1 or 2, characterized in that the axle receptacle for forming a joint axis is designed in the form of a through opening (12) at the free end of the cantilever arm (11 , 15) of the joint lever.

4. Flap fitting according to one of the preceding claims, characterized in that the hinge lever is U-shaped in cross-section in the area of ​​the opposing legs (7, 8).

5. Flap fitting according to one of the preceding claims, characterized in that the opposing legs (7, 8) are connected to each other by at least one axle bolt (5).

6. Flap fitting according to one of the preceding claims, characterized in that the hinge lever, in particular at least one of the legs (7, 8), is designed in multiple parts. - 9 - 7. Flap fitting according to one of the preceding claims, characterized in that the hinge lever consists of several plates which are connected to each other.

8. Flap fitting according to one of the preceding claims, characterized in that the cantilever arm (11 , 15) of the hinge lever has an angled web (13).

9. Flap fitting according to one of the preceding claims, characterized in that the bridge (13) is angled in the direction of the opposite leg (7, 8).

10. Flap fitting according to one of the preceding claims, characterized in that the cantilever arm (11 , 15) of the hinge lever is cranked at the free end in the direction of the opposite leg (7, 8).

11. Flap fitting according to one of the preceding claims, characterized in that the cantilever arm (11 , 15) of the hinge lever has a groove.

12. Flap fitting according to one of the preceding claims, characterized in that the lever mechanism (3) is coupled via a push rod (10) to a functional device, for example a damping element or a power storage device.

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