EP3649311A1

EP3649311A1 - Damping assembly and flap fitting

Info

Publication number: EP3649311A1
Application number: EP18735246.3A
Authority: EP
Inventors: Andre Kaiser
Original assignee: Hettich ONI GmbH and Co KG
Current assignee: Hettich ONI GmbH and Co KG
Priority date: 2017-07-03
Filing date: 2018-06-26
Publication date: 2020-05-13
Anticipated expiration: 2038-06-26
Also published as: WO2019007762A1; US20200131828A1; CN110869572B; CA3067706A1; CN110869572A; RU2762657C2; EP3649311B1; KR20200024864A; US11098516B2; DE102017114776A1; AU2018296734A1; BR112019028048A2; RU2019142138A3; JP2020525682A; KR102519464B1; RU2019142138A

Abstract

The invention relates to a damping assembly (40), in particular for a flap fitting (4), which damping assembly comprises a first spring holder (22) and a second spring holder (24), between which at least two springs (21) are arranged, which are designed as coil springs, wherein in each of the at least two springs (21) a linear damper having a damper housing (41) and having a piston rod (42) slidable relative to the damper housing (41) is arranged between the first and second spring holders (22, 24). Such a damping assembly is used in particular for a flap fitting for furniture in order to pivotably mount a flap on a furniture body and to apply high forces in a compact design.

Description

Damper assembly and flap fitting

The present invention relates to a damper assembly, in particular for a flap fitting, with a first spring holder and a second spring holder, between which at least two springs are arranged, which are designed as coil springs, and a flap fitting, in particular for furniture, with a fixable on a body housing to which a support lever is rotatably mounted, and a pivotally mounted control lever, wherein the support lever and the control lever via spaced pivot axes are pivotally connected to a flap, wherein the flap is biased via an energy storage at least over part of the range of motion.

EP 2 138 658 B1 discloses a flap fitting for a furniture flap, in which the furniture flap is pivotably mounted via an actuating arm and a control lever. About a tension spring, the furniture flap is biased in the closing direction. In order to lift the furniture flap in such flap fittings, energy storage devices are required which are intended to absorb high forces in a compact design. In addition, the user loud noises are often perceived as disturbing.

It is therefore an object of the present invention to provide a damper assembly, in particular for a flap fitting, which provides high forces for holding and closing a movable component, in particular a furniture part, in a compact design.

This object is achieved with a damper assembly having the features of claim 1. In addition, a flap fitting with such a damper assembly with the features of claim 10 is provided.

In the damper assembly according to the invention at least two springs designed as helical springs are provided, in each of which a linear damper with a damper housing and a displaceable relative to the damper housing piston rod are arranged. As a result, in the damper assembly large biasing forces can be exerted, the dampers prevent high acceleration and cause corresponding braking or damping forces. The springs and dampers can therefore straight At low travel distances, as required for flap fittings, increase the ease of use and have a very compact design.

Preferably, the first and the second spring holder are formed as a rigid bracket on which the damper and springs are mounted. At least three springs, for example four springs, are preferably provided in order to generate high preload forces, for example to compensate for weight forces in the case of a pivotable flap. The springs can be designed as pressure or tension springs.

To avoid lateral forces through the damper assembly, this is preferably formed symmetrically with respect to the arrangement of the springs to a central plane. To avoid loud impact noises a receptacle for fixing the damper housing and on the second spring holder a fixation for the piston rod is preferably provided on the first spring holder. Between the receptacle and the second spring holder while an elastic stop is arranged, which comes either directly to the spring holder or on a connected to the spring member component in an end position to the plant. The stop may be selectively fixed to the second spring holder or the end of the recording in order to produce any disturbing impact noises. In a further embodiment, the spring holders are connected to one another by additional damperless linear guide means, for example a sliding element guided on a rail, which are arranged outside or inside the springs. To produce different damping forces, the damper housing in a piston working space in which the piston of the damper is linearly displaceable, have different areas with different diameters. According to the invention, a flap fitting is also provided with a damper arrangement, wherein the flap fitting has a housing which can be fixed to a carcass, a rotatable support lever and a pivotably mounted control lever, wherein the support lever and the control lever can be connected in an articulated manner to a flap via spaced rotation axes. This can a movement sequence of the flap can be made comfortable via the damper arrangement, in particular with regard to the closing and opening of the flap. About the damper assembly is preferably a closing movement of the

Brake the flap before reaching the closed position. Preferably, the flap is biased in the closing direction in the closing direction via the force accumulator, and the flap is biased in an opening region in the opening direction. The user can then overcome a dead center when opening the flap, and after overcoming the dead center, the flap can spring-assisted or automatically moved in the opening direction during an opening movement. Conversely, the flap is moved automatically after overcoming the dead center in the closing direction and then braked over the damper. In a middle position of the flap, which can lie before and / or after the dead center position, the flap can also be kept in equilibrium, so that it does not carry out a closing or opening movement independently in the central opening area.

In order to make the control of the damper assembly exactly, a spring holder is preferably coupled via a cam guide with the control lever. The curve guide can be actuated via a transmission which is driven by the control lever. As a gear wheels, pivots or other transmission elements can be used. The invention will be explained in more detail below with reference to an embodiment with reference to the accompanying drawings. Show it:

Figure 1 is a perspective view of a piece of furniture according to the invention with a flap fitting;

Figure 2 is a perspective view of the front panel with a flap fitting;

FIGS. 3A and 3B show two views of the furniture of FIG. 1 with an opened flap;

Figures 4A and 4B show two views of the pivot fitting in a closed position; Figure 5 is a view of the pivot fitting with partially removed housing in a closed position;

Figures 6 to 8 show several views of the flap fitting of the figure in different positions;

Figure 9 is a view of the flap fitting in an open position; FIGS. 10A and 10B show two views of a damper arrangement according to the invention for the flap fitting in different positions;

Figures 1 1 A and 1 1 B show two views of the damper assembly of Figure 1 0 without springs, and

Figure 1 2 is a view of a modified flap fitting, which is arranged in a side wall of a piece of furniture. A piece of furniture 1 comprises a furniture body 2, for example for a wall unit in a kitchen, in which the rear wall has been omitted in FIG. At a front side of the furniture body 2 is closed by a flap 3 pivotally mounted. To guide the flap 3 is mounted on opposite side walls of the furniture body 2 each have a flap fitting 4, which has a housing 5. Each flap fitting 4 comprises a support lever 6 and a control lever 7, which are connected via a connection 9 with the flap 3. The two connections 9 of the opposite flap fittings 4 are synchronized via a rod 8, so that when opening and closing the flap 3, the flap fittings 4 are moved substantially synchronously.

FIG. 2 shows a flap fitting 4 with the flap 3 without furniture body 2. The housing 5 of the flap fitting 4 comprises two side walls 50 and 51, which are arranged spaced from each other by a plurality of spacers 52. Other types of housing can be used for the housing 5.

In Figures 3A and 3B, the flap 3 is shown in an open position. The flap 3 is with an upper area forward away from the Mö- belkorpus 2 has been pivoted, while a lower portion of the flap 3, on which an unillustrated handle member is mounted, has been pivoted substantially vertically upwards. In this respect, the user only has to perform a slight horizontal movement and essentially a vertical movement when opening and closing the flap 3.

In addition to the opening movement shown, other opening movements, as are known in the art, the flap 3 can be realized. These opening movements include e.g. the simple folding up or folding up the flap 3.

In Figures 4A and 4B, the flap fitting 4 is shown in a closed position. The support lever 6 and the control lever 7 are partially arranged parallel to each other and extend substantially in the vertical direction up to the connection 9, which is mounted on the flap 3.

In Figure 5, the flap fitting 4 is shown in a closed position without the side wall 50 of the housing. The support lever 6 is articulated at one end about a rotation axis 61 on the connection 9 and on the opposite side about a rotation axis 60, which is provided on the housing 5.

To the rotation axis 60 is rotatably connected to the support lever 6, a first gear 10 which is in engagement with a second gear 1 1, which is rotatably mounted about an axis of rotation 1 2 to the housing 5. At the second gear 1 1 spaced from the axis of rotation 1 2 of the gear 1 1, a rotation axis 70 is provided, on which the control lever 7 is rotatably mounted. The control lever 7 is rotatably mounted at the opposite end about a rotation axis 71 on the connection 9. The rotation axis 70 thus moves during an opening and closing operation of the flap 3, which is held on the connection 9.

The connection 9 can be formed both one or more parts.

In order to partially compensate for the weight forces of the flap 3 during opening and closing, a force accumulator 20 is provided which comprises three springs 21, in particular tension springs in the illustrated embodiment, which are arranged between a first spring holder 22 and a second spring holder 24. The second spring holder 24 is fixed via a fastening 25 on the housing 5. The spring holder 22 is connected via a rod 23 with a movable holder 1 8 connected. On the holder 1 8 a receptacle 1 9 is provided, on which the rod 23 of the energy accumulator 20 is fixed, so that the holder 1 8 is biased by the energy accumulator 20. The holder 1 8 has a guide member 1 7, which is mounted in a cam guide 1 6 a control disk 1 5. The control disk 15 is rotatably mounted about an axis of rotation 14 which is provided on the housing 5. Further, the control disk 1 5 rotatably coupled to a third gear 13, which is in engagement with the first gear 1 0. Various positioning possibilities for positioning the rod 23 of the energy storage device 20 are formed on the receptacle 19 of the holder 18, so that an optimum presetting of the spring action on the weight forces of the flap 3 to be compensated can already take place by selecting a suitable position. Instead of positioning options, a stepless presetting can be provided, for example in the form of a screw / nut connection, by which the position of the rod 23 to the holder 1 8 can be changed.

The term "gearwheel" is understood to have turntables with an outer toothing, the outer toothing optionally extending over the entire circumference or only part of the circumference. Alternatively, toothed segments, internal gears or other components may be used as gears on which teeth for the positive engagement 'are provided with an adjacent gear.

On the housing 5, a damper 30 is further provided, which is designed as a linear damper, in particular as a fluid, liquid or air damper, which is held on a fastening element 31 on the housing 5 and comprises a piston-cylinder unit which creates damping forces when compressed. On the side facing away from the fastening element 31, a contact surface 32 is provided, for example a contact roller, which can be contacted by an actuating element 33 on the holder 18.

For an opening operation, a handle arranged in the lower region of the flap 3 is operated by a user to move the flap 3 forward and upward. In FIG. 6, the flap 3 is shown in a slightly open position. The energy accumulator 20 is stretched further at the beginning of the opening movement, since the flap 3 is biased in the closing direction in the closing direction. After overcoming a dead center of the energy storage device 20 supports the movement of the flap 3 in the opening direction. If the flap 3 is moved further in the opening direction, as shown in Figure 7, pivot both the support lever 6 about the axis of rotation 60 and the control lever 7 about the axis of rotation 70 which is disposed on the rotatable gear 1 1. From the closed position (FIG. 5) to the position in FIG. 7, the gear 1 1 has been rotated approximately 90 °, so that the axis of rotation 70 has also shifted. The gears 1 0 and 1 1 are engaged, so that the two support lever 6 and the control lever 7 are coupled to each other both in the region of the housing 5 and at the connection 9. By the rotation of the gear 10 and the third gear 1 3 is driven, which rotates the control disk 15. By turning the control disk 1 5, the cam guide 1 6 is moved, which allows a contraction of the springs 21 of the energy accumulator 20 at an opening movement after exceeding the dead center, so that the energy storage 20 supports the opening process. The flap 3 is moved further in the opening direction according to Figure 8, wherein an upper end of the flap 3 protrudes forward and upward. A lower region of the flap moves substantially vertically upward shortly before the opening on the furniture body 2. In Figure 9, the maximum opening position of the flap fitting 4 is shown. The flap 3 is slightly inclined to the horizontal, for example, in a range between 1 0 ° and 20 °, and are the opening portion of the furniture body 2 largely free. Before reaching the maximum opening position, the opening movement can be decelerated, for example by a damper, which is arranged in the connection 9. Alternatively or additionally, the damper 30 is provided in the housing 5, which is compressed by the actuating element 33 on the holder 18, as shown in Figure 8.

For a closing movement, the user pulls the flap 3 down against the force of the force accumulator 20 until the flap 3 is again arranged in the closed position shown in FIG.

In the illustrated embodiment 5 three gears 1 0, 1 1 and 1 3 are arranged in the housing. It is also possible to provide in the housing 5 a gear with a predetermined gear ratio in order to adapt the clamping and discharging of the energy accumulator 20 even more closely to the weight of the flap 3 and other parameters. Shown in Figures 10A and 10B is a damper assembly 40, as shown schematically in Figures 5-8. The damper assembly 40 comprises three springs 21, which are designed as helical springs and are tensioned between the first spring holder 22 and the second spring holder 24. The springs 21 are designed as tension springs and have an eye on the end, which are mounted on pins 26 on the spring holders 22 and 24. Other mechanisms for securing the springs 21 may be used. It is also possible to use compression springs instead of tension springs. The two spring holders 22 and 24 are bow-shaped, wherein on the first spring holder 22, a rod 23 or a joint is provided for connection to the actuating mechanism. At the second spring holder 24, a fastening 25 for fixing to the housing 5 is arranged.

The execution of the flap fitting 4 is to be understood only as an example. Instead of the four-bar arrangement which is formed by the support lever 6 and the control lever 7, and a Siebengelenkanordnung can be formed by the support lever 6 and the control lever 7 and other levers. In a Siebengelenkanordnung the support lever 6 and the control lever 7 are thus connected via the other lever to the flap 3. Also, the axes of rotation of the support lever 6 and the control lever 7 may be fixed to the base body 5, so that the rotation axis 70 performs no relative movement to the base body 5 in the flap movement. It follows that the power transmission from the joint assembly 6, 7 to the damper assembly 40 can be designed differently.

The damper assembly 40 includes in the two outer springs 21 each have a damper, which is designed as a linear damper and a damper housing 41 and a piston rod 42 has. In the middle spring 21, a further helical spring is arranged, so that in the damper arrangement in the FIGS. 10A and 10B, four springs are actuated during a movement of the spring holders 22 and 24. It is also possible to use only two or three springs 21 in the damper assembly 40, or more than four springs.

FIGS. 11A and 11B show the damper arrangement of FIG. 10 without spring 21. On the spring holder 24, a sleeve-shaped receptacle 43 is formed, into which a cylindrical damper housing 41 is inserted and, for example, is fixed by clamping or latching. End of the receptacle 43, an elastic stop 44 is arranged, for example made of rubber or an elastomer, the loud impact noises between the recording 43 and the spring holder 22 avoids. At the ends of the spring holder 22, which assign to the receptacles 43, stops 45 are formed for this purpose. From each damper housing 41 protrudes a linearly displaceable piston rod 42, the end has a thickened head portion 46 which is fixed to the Fe- holder 22 in a receptacle. When moving the spring holder 22 and 24 relative to each other, the dampers are thus actuated, wherein the dampers are designed as a pressure damper and 41 upon insertion of the piston rod 42 in the damper housing 41 generate damping forces, while the extraction of the piston rod 42 is smooth. It is also possible to use damper instead of pressure dampers. The linear dampers preferably have a damping fluid, such as oil, in particular silicone oil.

The elastic stop 44 is fixed to the end of the receptacle 43. Of course, it is also possible to arrange the stop 44 at one end of the bow-shaped spring holder 22 adjacent to the head section 46.

In FIGS. 1 to 9, a flap fitting 4 is fastened to the inside of a side wall of a furniture carcass 2. In FIG. 1 2, the flap fitting 4 is not integrated on an inner side but in a side wall of the furniture body 2. For this purpose, the side wall comprises a plate-shaped core material 80, for example of a wood material, on which the housing 5 of the flap fitting 4 is disposed adjacent, either over the entire width of the core material 80 or at a recess of the core material 80, which extends only over part of the width of the core material 80. The housing 5 and the core material 80 are covered on the outside by an outer layer 81 and on the inside by an inner layer 82, wherein the outer layer 81 and the inner layer 82 can optionally also be of identical construction, for example of a film or a decorative layer. In the illustrated embodiment, the inner layer 82 is fixed to the core material 80 and the housing 5 via attachment points. The housing 5 may be glued to the core material 5 or fasteners may be connected. Due to the arrangement of the housing in the side wall of a furniture body, the housing is visible only from one end side with the door open when the support lever 6 and the control lever 7 project forward. LIST OF REFERENCE NUMBERS

1 furniture

2 furniture carcass

3 flap

4 flap fitting

5 housing

6 support lever

7 control lever

8 pole

9 connection

10 gear

1 1 gear

12 axis of rotation

13 gear

14 axis of rotation

15 control disk

16 cornering

17 guide element

18 holders

19 recording

20 energy storage

21 spring

22 spring holder

23 pole

24 penholder

25 attachment

26 cones

30 dampers

31 fastener

32 contact area

33 actuator

40 damper assembly

41 damper housing

42 piston rod

43 recording

44 stop

45 stop

46 head section Side wall

Side wall

Spacer rotation axis

axis of rotation

Core material outer layer inner layer attachment points

Claims

claims

1 . Damper arrangement (40), in particular for a flap fitting (4), with a first spring holder (22) and a second spring holder (24), between which at least two springs (21) are arranged, which are designed as helical springs, characterized in that the at least two springs (21) in each case a linear damper with a damper housing (41) and a relative to the damper housing (41) displaceable piston rod (42) between the first and the second spring holder (22, 24) is arranged.

2. damper assembly according to claim 1, characterized in that the first and the second spring holder (22, 24) are formed as a dimensionally stable bracket.

3. Damper arrangement according to claim 1 or 2, characterized in that at least two springs, preferably four springs, between the two spring holders (22, 24) are arranged.

4. Damper assembly according to one of the preceding claims, characterized in that the damper assembly (40) is symmetrical with respect to the arrangement of the springs (21) to a median plane.

5. Damper arrangement according to one of the preceding claims, characterized in that on the second spring holder (24) has a receptacle (43) for fixing the damper housing (41) is provided, wherein on the receptacle (43) end an elastic stop (45) for the first spring holder (22) is arranged.

6. Damper arrangement according to one of the preceding claims, characterized in that the springs (21) are designed as tension springs or compression springs.

7. Damper arrangement according to one of the preceding claims, characterized in that the spring holders (22, 24) are connected to each other by additional damperless linear guide means, which are arranged outside of the springs (21).

8. damper assembly according to any one of the preceding claims, characterized in that the spring holder (22, 24) are interconnected by additional damperless linear guide means which are arranged within at least one spring (21).

9. Damper arrangement according to one of the preceding claims, characterized in that the damper housing (41) in the piston working space has different areas with different diameters.

10. flap fitting (4), in particular for furniture, wherein the flap fitting

(4) on a body (2) can be arranged, wherein the flap fitting (4) has a base body (5) on which a support lever (6) is rotatably mounted, and a pivotally mounted control lever (7), wherein the support lever (6 ) and the control lever (7) via spaced axes of rotation (61, 71) are pivotally connected to a flap (3) or via other levers with a flap (3) are connectable, wherein the flap (3) via an energy storage (20) at least is biased over part of the range of motion, characterized in that on or in the base body

(5) a damper assembly (40) according to one of the preceding claims is provided.

1 1. Flap fitting according to claim 10, characterized in that by means of the damper arrangement (40) is braked a closing movement before reaching the closed position of the flap (3).

12. flap fitting according to claim 10 or 1 1, characterized in that the force accumulator (20) biases the flap (3) in a closed position in the closing direction and biases the flap (3) in an opening region in the opening direction.

13. flap fitting according to one of claims 10 to 12, characterized in that a spring holder (22) via a cam guide (1 6) is coupled to the control lever (7).

14. flap fitting according to claim 13, characterized in that the

Curved guide (1 6) can be actuated via a transmission which is driven by the control lever (7).

15. flap fitting according to claim 14, characterized in that the

Gear has at least one gear (13) or a lever arm.