EP2142734B1 - Panel fitting - Google Patents

Description

The present invention relates to a flap fitting, in particular for cabinet furniture, with a pivoting part which is connectable to a flap and is mounted on two guide levers and a holding plate which is connectable to a furniture body, wherein on the holding plate two levers are mounted, one of which the first lever is pivotally connected to both guide levers and a second lever is pivotally connected to a guide lever.

There are flap fittings for cabinet furniture in which a flap is pivoted from a closed position up to release an interior. Especially in kitchen furniture such flap fittings are used in wall units. When the flap is in the open position, the user usually has to reach far up to close the flap. This is perceived as laborious and not every user can open and close the flaps located at the top.

The EP 0 361 020 discloses a mechanism according to the preamble of claim 1 for opening and closing a tailgate of a vehicle. The tailgate is pivotable via a plurality of levers in an open position, wherein a torsion bar is provided which initiates a counterforce to the weight of the tailgate in the mechanism. In addition, a fluid cylinder can be used to support the pivoting movement.

The EP 0 952 290 shows a fitting for pivotally supporting a flap on a cabinet body. For this purpose, a lever mechanism is provided, which can be tensioned via a coil spring of a tension spring device, wherein the coil spring holds the flap during an opening movement in an open position. In order to make an adjustment to different weights, the force of the tension spring device is adjustable.

In addition, the shows WO 2007/035971 a furniture hinge, in which a hinge part is driven by an electric motor. The electric motor can be formed via a snap be.

It is therefore an object of the present invention to provide a flap fitting, which is connected in a simple manner with a drive for automatically opening and closing the pivoting part.

This object is achieved with a flap fitting with the features of claim 1.

According to the invention a coupling element is provided on the flap fitting on a lever or guide lever, which is movable by a drive for moving the pivoting part. The arrangement of a coupling element on a lever or guide lever has the advantage that the flap fitting can be functionally mounted on furniture without drive device, so that retrofitting of the drive for certain applications is possible. In this case, the coupling element can be mounted with comparatively little installation effort on the lever or guide lever. The coupling element is connected to at least one arbitrary lever, so a movable fitting part to allow automatic opening of the flap fitting. According to the invention, the coupling element is connected to a hinge axis with the guide lever and the lever. The arrangement on the joint axis is on the one hand for mounting easy and also results in predetermined power ratios for the drive elements, depending on the opening angle of the pivoting part.

For a compact construction, the drive is arranged adjacent to the retaining plate on the side facing away from the pivoting part or under the retaining plate. As a result, the drive is relatively far away from the opening area of the flap and thus only poorly visible.

For easy handling, the pivoting part in an opening region, preferably between an open position of at least 45 ° to 110 ° through Clamping and friction forces can be fixed. This allows the drive to open the pivoting part that can be fixed in a desired angular position. It is not necessary to always fully open and close the pivoting part.

According to a further embodiment of the invention, a spring is provided, by means of which the pivoting part is biased in a closed position into the closed position and after pivoting of the pivoting part beyond a dead center in the open position. The spring may be formed as a spiral spring, gas spring, compression spring, tension spring or other energy storage. The spring can reduce the force required to move the pivoting part, since a part of the weight is compensated when opening the flap of the spring. In this respect, the engine can thereby be made relatively small. In addition, the spring pulls the flap in a closed position to avoid a slight protrusion.

Preferably, the drive power of the drive for pivoting the pivoting part is dependent on the open position of different sizes and the opening angle of the pivoting part, in which the largest adjusting force is expended, is not the opening angle at which the largest power consumption of the drive. In other words, the drive is coupled to the levers such that in the maximum open position, in which the greatest weight force of the flap acts on the pivoting part, there is a force transmission, so that the drive does not have to provide the maximum power output in this opening region , As a result, the motor of the drive can be made slightly smaller than in a construction in which the power output of the motor is directly proportional to the introduction of force to the pivoting part. Preferably, the power output is at least 10% to 20% smaller than in a drive structure in which a direct drive is performed on a lever or guide lever. The translation between the engine and the lever or guide lever need not be made over the entire pivoting range, but in particular only in a Endöffnungsbereich where the largest weight forces are present.

The drive comprises an electric motor which is connected via a gear to the coupling element. In this case, the coupling element can be mounted at one side on a gear spaced from its axis of rotation and on the opposite side to the hinge axis between the second lever and the guide lever. As a result, when using standard components, such as gears, a drive device can be provided. In order to ensure a quick opening, the coupling element can reach a maximum opening speed of the pivoting part in a central pivoting range of the pivoting part at a constant speed of the drive. Because the user would like to achieve a rapid opening of the door in a medium pivoting range, but not be startled by a protruding flap at the beginning or be disturbed by a hard stop the flap at the end of the open position by loud noises. In this respect, the pivoting at different speeds is advantageous.

According to a further embodiment of the invention, the coupling element is connected to a spindle drive. This can also be easily mounted on the mounting plate or another component for moving the swivel fitting. In addition, it is possible to provide a drive with a linkage which is movable by a windable rope. For the drive of the fitting, a rotary lever may be provided, which is mounted at a hinge point of a lever and is driven on a section extending beyond the lever.

Figuren 1 A bis 1C

verschiedene Ansichten eines erfindungsgemäßen Klappenbeschlages in unterschiedlichen Öffnungsstellungen;

Figuren 1D bis 1F

mehrere Diagramme zu den mechanischen Verhältnissen bei dem Klappenbeschlag der Figuren 1A bis 1C abhängig vom Öffnungswinkel;

Figuren 2A bis 2D

mehrere Ansichten eines modifizierten Klappenbeschlages in unterschiedlichen Öffnungsstellungen;

Figuren 3A bis 3C

mehrere Ansichten eines erfindungsgemäßen Klappenbeschlages mit einem Spindelantrieb;

Figur 3 D

ein Diagramm zu den mechanischen Verhältnissen bei dem Klappenbeschlag gemäß den Figuren 3A bis 3C;

Figuren 4A bis 4C

mehrere Ansichten eines weiteren Beschlages in unterschiedlichen Öffnungsstellungen; und

Figuren 4D und 4E

zwei Diagramme zu den mechanischen Verhältnissen bei dem Klappenbeschlag gemäß den Figuren 4A bis 4C.

The invention will be explained in more detail with reference to several embodiments with reference to the accompanying drawings. Show it:

Figures 1 A to 1C

different views of a flap fitting according to the invention in different open positions;

FIGS. 1D to 1F

several diagrams of the mechanical conditions in the flap fitting the FIGS. 1A to 1C depending on the opening angle;

FIGS. 2A to 2D

several views of a modified flap fitting in different open positions;

FIGS. 3A to 3C

several views of a flap fitting according to the invention with a spindle drive;

FIG. 3 D

a diagram of the mechanical conditions in the flap fitting according to the FIGS. 3A to 3C ;

FIGS. 4A to 4C

several views of another fitting in different open positions; and

Figures 4D and 4E

two diagrams of the mechanical conditions in the flap fitting according to the FIGS. 4A to 4C ,

In Figure 1A a flap fitting 1 is shown, which is mounted on a furniture body 2, preferably a cabinet furniture, in order to pivot a flap 3 upwards. For this purpose, a pivot member 4 is fixed to the flap 3, which is formed at an angle and at a portion 5 perpendicular to the plane of the flap 3 has a hinge axis 6, on which a guide lever 7 is mounted. Spaced from the axis 6, a further axis 8 is formed on the portion 5, on which a second guide lever 9 is rotatably mounted.

The guide lever 9 is connected on the end remote from the pivot part 4 via an axis 16 with a first lever 11, which is also coupled to the guide lever 7 articulated about an axis 17. Spaced apart from the first lever 11, a second lever 12 is provided, which is connected at one side via an axis 13 with the guide lever 7 and at the other end via an axis 14 with a holding plate 20 articulated.

As in the Figures 1B and 1C can be seen, the pivoting part 4 can pivot relative to the holding plate 20 to open the flap 3. The flap fitting 1 shown is a fitting with seven hinge axes 6, 8, 16, 17, 13, 14 and 15. The arrangement of these axes and the geometry of the levers 7, 9, 11 and 12 can be varied depending on the application.

In order to move the pivot member 4 more easily in the open position, a spring 25 is provided, which is mounted at one end to an axle 24 which forms a hinge point for a lever 21 and a lever 22. The lever 21 is pivotally mounted on the hinge axis 13 and the lever 22 is fixed on the side facing away from the axis 24 on an axis 23 which is provided on the holding plate 20. The spring 25 is fixed on the side facing away from the axis 24 on a pin 26 which is adjustably held on a screw 27 in order to adjust the spring tension can.

In the closed position of the flap 3, the spring 25 presses the pivoting part 4 in the closed position, since to open the pivoting part 4 via the mechanism, the levers 21 and 22 are first moved toward each other with the axes 13 and 23, so that the length of the Spring 25 is slightly enlarged at the beginning. Only after an angle of for example 15 ° to 25 °, the length of the spring is reduced and the spring 25 now presses the pivot member 4 in an open position. After exceeding a dead center thus the opening movement is supported by the spring 25.

In order to be able to open and close the flap fitting not only manually but also automatically, a drive device is provided. This comprises a coupling element 30 in the form of a lever, which is mounted on one side on the hinge axis 13 and on the opposite side on an axis 35 on a gear 33. The gear 33 is rotatably mounted about an axis of rotation 34, wherein the axis 35 is arranged at a distance from the axis of rotation 34. The gear 33 is driven by a motor 32 which is connected via an output shaft with a worm 40 and a plurality of gears 36, 37, 38 and 39 with the gear 33. By the gears 36 to 39, a translation is provided, so that the electric motor 32 can be made relatively small. The transmission 31 can also be modified as needed.

To automatically open the flap 3, the motor 32 drives the gear 33 from the in Figure 1A shown position counterclockwise until initially in FIG. 1B shown position is reached. In this position, a line between the axes 13 and 35 of the coupling lever 30 is arranged approximately perpendicular to a radial between the axis of rotation 34 and the axis 35, that is, the opening of the flap 3 is particularly fast in this position, since the movement of the coupling rod 30 and the guide lever 7 is largely rectilinear.

Upon further opening then the maximum opening position of the flap 3 is corresponding Figure 1C reached. In this position, the gear 33 rotates the axis 35 in a direction that moves the coupling lever 30 only slightly in a direction corresponding to the line of the axes 13 and 35 and rather pivots. Therefore, the opening movement of the flap 3 is comparatively slow at the end of the opening movement, while in a central region, the opening movement of the flap 3 at a constant speed of the gear 33 is large.

In FIG. 1D is a diagram of the mechanical conditions when opening the flap fitting 1 is shown. With the line A, the force acting on the guide lever 7 on the axis 13 is shown. First, a certain force must be expended to open the flap 3 against the force of the spring 25, in which case a dead center is passed, in which the force of the spring 25 acts in the opening direction and the weight of the flap 3 is still relatively low due to the small opening angle , From a certain opening angle, however, the weight of the flap 3 presses the guide lever 7 and this force is corresponding to the end position Figure 1C getting bigger.

With the graph B, the torque acting on the gear 33 when opening the flap 3 is shown graphically. Due to the design of the drive device with the coupling rod 30 and the gear 33 just at the end of the opening process, the torque is slightly lower again, which can be explained by the bearing of the axle 35 on the gear 33. Because at the end of the opening process causes a rotation of the gear 33 only a slight movement of the flap. 3

Graph C schematically shows the necessary engine power, depending on the opening angle.

In Figure 1E the engine performance is shown in graph C in a different resolution, the graph D shows the engine power depending on the opening angle. It can be seen that according to the graph B for the torque on the gear and the engine power at the end of the opening process no longer increases, but drops again. As a result, the maximum necessary engine power is less than in a motor that would drive the lever 12 directly, for example. As a result, the corresponding electric motor can be made comparatively small.

In Figure 1F is shown schematically a performance curve for a direct drive, in which, for example, the motor 12 drives the lever directly. Then the necessary engine power increases up to a maximum at the end of the opening process, at which the greatest weight force is present through the flap 3. Due to the higher power consumption at the end of the opening process, the motor must be designed correspondingly powerful.

In the following embodiments, the fitting parts with the holding plate 20, the guide lever 7 and 9, the levers 11 and 12 and the pivot member 4 are formed as in the first embodiment. These components will therefore not be described again in detail below.

At the in FIGS. 2A to 2D shown flap fitting is the coupling rod 30 'modified and formed a modified gear 33' rotatably mounted. The gear 33 'does not rotate counterclockwise as in the first embodiment, but clockwise about the flap 3 from a closed position (FIG. FIG. 2A ) first to move into a slightly open position ( FIG. 2B ). By further turning the gear 33 'clockwise, the flap 3 is moved to the maximum open position, as in Figure 2C you can see.

In FIG. 2D a perspective view of the flap fitting is shown, it can be seen that the fitting parts build comparatively thin and compact are arranged. The mechanical forces, torques and powers are similar to those of the first embodiment.

In the FIGS. 3A to 3C a further embodiment of a flap fitting is shown. The flap fitting comprises a rod-shaped coupling element 50 which is rotatably connected to the guide lever 7 on the axis 13. On the coupling element 50, a driver 54 is arranged in a central region, which comprises a spindle nut and on a rotatable spindle 53 is movable. The spindle 53 is fixed to a spindle housing 52 and driven by a motor 55. By rotating the spindle 53, the spindle nut moves with the driver 54 and thus can the coupling element 50 from a closed position ( FIG. 3A ) via a middle opening position ( FIG. 3B ) in a fully open position ( FIG. 3C ) move. The spindle drive 51 is fixed to the holding plate 20.

In Figure 3D the mechanical conditions in the spindle drive 51 are shown in a graph. The graph G shows the force on the guide lever 7 in the region of the bearing 13, wherein the force on the guide lever 7 also increases with increasing opening angle.

The graph H shows the force on the spindle 53, which, unlike the force on the guide lever G at the end no longer increases but drops. This is related to the orientation of the spindle 53, which is arranged at a predetermined angle relative to the guide lever 7. This also makes it possible to obtain a corresponding ratio in the area of the opening path.

This results in a motor power according to graph I, which is also lower at the end than in a middle range.

In the FIGS. 4A to 4C a further embodiment of a flap fitting is shown, in which the drive means comprises a coupling element 60 in the form of a lever which is rotatably connected to a further lever 61 via an axis 62. The lever 61 is also fixed to a further axis 63 on the furniture body 2 or on a corresponding holding plate 20. To open and Closing the flap 3, a cable 64 is provided, which is fixed on one side to the axis 62 and on the opposite side to a roll 65 can be wound up. The roller 65 is drivable via a toothed segment 66, which is connected via a gear with an electric motor 67.

By pulling on the cable 64, the flap 3 is first moved from a closed position (FIG. FIG. 4A ) is moved to a slightly open position ( FIG. 4B ). If the cable 64 continues to be wound on the roller 65, the flap opens to a maximum opening position, as in FIG. 4C is shown.

In Figure 4D the mechanical conditions when opening the flap fitting are shown. The graph K shows the force acting on the rope 64 depending on the opening angle of the flap 3. The force on the rope K passes through a maximum which is spaced from the maximum opening angle. This is due to the fact that the position of the axis 62 when opening the flap fitting changes and the balance of power cheaper. The graph J, however, shows the force on the guide lever 7 in the region of the axis 13, which increases continuously with increasing opening angle.

The graph L shows the necessary engine power, which is necessary when opening the flap 3. Since the force on the rope at the end of the opening path drops again, the motor power at the end of the opening path drops again, so that the electric motor 67 can be made relatively small.

In Figure 4E the power curve of the motor in the drive device with the cable 64 is shown enlarged. The graph M shows the power curve, which demands different power depending on the opening angle of the electric motor 67, whereby just at the maximum opening angle, despite the weight force through the flap 3, the power drops slightly again.

In the illustrated embodiments, only a driven opening and closing of the flap fitting is explained. Of course it is also possible, instead, the flap fitting manually to open and close. Then, between the drive and the coupling element, a clutch as an overload clutch, for example a transmission arranged on the clutch, provided, which allows a manual movement of the pivoting member relative to the retaining plate.

In addition, it is possible to connect the drive for the flap fitting with a controller so that via keys, switches, sensors or a remote control opening or closing of the flap fitting takes place. In addition, touch sensors, radio sensors and other sensors and switches for the control can be arranged on the furniture body.

Claims (9)

1. A panel fitting, especially for cabinets, comprising a pivot part (4) which can be connected to a panel (3) and is supported on two guide levers (7, 9), and a retaining plate (20) which can be connected to a furniture body (2), with two levers (11, 12) being supported on the retaining plate (20), of which a first lever (11) is connected to the two guide levers (7, 9) in an articulated manner and a second lever (12) is connected to one guide lever (7) in an articulated manner, with a coupling element (30, 30', 50, 60) being provided on a lever (11, 12) or guide lever (7, 9), with the coupling element (30, 30', 50, 60) being displaceable by a drive (32, 55, 67) for moving the pivot part (4) and the drive (32, 55, 67) comprising an electric motor which is connected via a gear (36 to 39) to the coupling element (30, 30', 50, 60), characterized in that the coupling element (30, 30', 50, 60) is arranged as an additional lever, which is mounted on one side on the gear and on the opposite side on the hinge axis (13) between the second lever (12) and the guide lever (7).
2. A panel fitting according to claim 1, characterized in that the drive (32, 55, 67) is arranged adjacent to the retaining plate (20) on the side facing away from the pivot
   / part (4).
3. A panel fitting according to one of the claims 1 to 2, characterized in that the pivot part (4) can be fixed by clamping or frictional forces in an opening range, preferably between an opening position of at least 45° to 110°.
4. A panel fitting according to one of the claims 1 to 3, characterized in that a spring (25) is provided, by means of which in a closed position the pivot part (4) is pretensioned into the closed position and, after the pivoting of the pivot part (4) beyond the dead center, into the opened position.
5. A panel fitting according to one of the claims 1 to 4, characterized in that the driving power of the drive (33, 55, 67) for pivoting the pivot part (4) is different and the opening angle of the pivot part (4) where the largest adjusting force is applied is not the opening angle where the largest power requirement of the drive (32, 55, 67) occurs.
6. A panel fitting according to one of the claims 1 to 5, characterized in that the coupling element (30, 30') is held on one side on a gearwheel (33, 33') spaced from its rotational axis (34) and on the opposite side on a hinge axis (13) between a lever (11) and a guide lever (7).
7. A panel fitting according to claim 6, characterized in that the coupling element (30, 30') achieves a maximum opening speed of the pivot part (4) in a middle swiveling range of the pivot part (4) at constant speed of the drive (32).
8. A panel fitting according to one of the claims 1 to 7, characterized in that the coupling element is connected to a spindle drive (52 to 54).
9. A panel fitting according to one of the claims 1 to 7, characterized in that the drive comprises a rod assembly (60, 61) which can be moved by a cable (64) that can be wound up.

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