EP3649314A1

EP3649314A1 - Flap fitting and item of furniture

Info

Publication number: EP3649314A1
Application number: EP18735244.8A
Authority: EP
Inventors: Uwe Sobolewski; Stefan Andschus; Michael Tasche; Oliver Schael
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: CN110832163A; US20200131829A1; WO2019007760A1; DE102017114772A1; CA3067473A1; EP3649314B1; AU2018296732A1; BR112019027934A2; RU2763183C2; RU2020102738A3; US11053723B2; RU2020102738A; CN110832163B

Abstract

The invention relates to a flap fitting (4), in particular for furniture, comprising a housing (5) secured to a body (2), on which housing a support lever (6) is rotatably mounted about a first axis of rotation (60), and the support lever (6) can be connected to a flap (3) about a second axis of rotation (61) using a connection (9), and a control lever (7) which can be connected via the connection (9) to the flap (3) about a third axis of rotation (71), the control lever (7) being articulatedly connected about a fourth axis of rotation (70) to a control element (11) and to the housing (5), and the flap (3) being pivotable via a gripping element (40), wherein a centre of rotation (M) of the flap (3) when in a closed position is located below the gripping element (40) and when in a maximum open position is located above the gripping element (40). As a result the flap (3) can be smoothly opened and closed by a user.

Description

Flap fitting and furniture

The present invention relates to a flap fitting, in particular for

Furniture, with a fixable on a body housing to which a support lever is rotatably mounted about a first axis of rotation, and the support lever via a second axis of rotation with a connection with a flap is connectable, and a control lever, via a third axis of rotation via the connection is connectable to the flap, wherein the control lever via a fourth axis of rotation is pivotally connected to a control element and the housing, and the flap is pivotable via a handle member.

WO 2009/060723 A1 discloses a piece of furniture with a flap fitting, in which a housing plate is fixed to a furniture body, on which a support lever and a control arm are rotatably mounted. The support lever and the control arm are also rotatably mounted on a connection to the flap, so that between the body and the flap a parallelogram-like guide is present. In this flap fitting is disadvantageous that the axes of rotation are provided on the support lever and the control lever at fixed points of the housing plate or the connection, so that to achieve the desired pivotal movement of the flap with an upwardly and forwardly projecting into the room opening position, the pivot points on the Housing plate are comparatively far apart, which precludes the requirement for a compact design. In addition, the operation of the flap fitting is relatively stiff.

It is therefore an object of the present invention to provide a flap fitting, which is compact and allows the user a smooth opening and closing of the flap.

This object is achieved with a flap fitting with the features of claim 1. In the flap fitting according to the invention is a Momentanpol the

Flap in a closed position below the handle element and in a maximum opening position above the handle element. In this case, only the support lever via a first axis of rotation is stationary connected to a housing, while the control lever via a control articulated to the housing is mounted so that the fourth axis of rotation moves during an opening or closing movement relative to the housing. As a result, a movement path of the flap can be set optimally and the force required by the user can be minimized.

In the case of a plane movement of a rigid body, the instantaneous pole is that point in space around which the body can momentarily be regarded as merely turning. In a planar movement of a rigid body with a translational movement and a rotational movement, these are combined to a pure rotational movement about the current pivot point, which is referred to as instantaneous.

During the movement of the flap, the instantaneous pole continues to change in each detected position. If these positions are determined, the result is a reference system fixed in space, in this case the stationary body, a path on which the instantaneous pole runs. The instantaneous pole of the flap can be determined for any point on the flap or for points of other components connected to the flap. In the proposed technical solution, it is preferable to determine the instantaneous pole starting from the second and third axes of rotation, which are arranged on the connection of the flap.

The flap movement is preferably determined in the respectively considered snapshot by the first connecting line of the first with the second axis of rotation, and the second connecting line of the fourth with the third axis of rotation, which in principle represents a four-bar linkage. The first connecting line of the first with the second axis of rotation in this case represents the force action line of the support lever, while the second connecting line of the fourth with the third axis of rotation represents the line of action of the control lever. The intersection of the extensions of the first and second connecting lines gives the position of the instantaneous pole.

Preferably, the path of the instantaneous pole of the flap extends at an opening movement of the flap spaced from the handle member. Just when the instantaneous pole and the grip element coincide too close, jamming can occur due to tolerances on the joint axes. The distance of the path of the instantaneous pole from the grip element can therefore correspond, for example, to at least 20% of the length of the support lever, preferably at least 40% of the length of the support lever. In an advantageous th embodiment, the distance of the instantaneous pole of the handle member in the closed position of the flap is greater than the length of the support lever.

For smooth pivoting, the distance of the instantaneous pole from the grip element over the entire path of the instantaneous pole can amount to at least 50%, in particular at least 70%, of the distance of the grip element from the first axis of rotation.

The orbit of the instantaneous pole can first of all extend upward in an arcuate manner during an opening movement of the flap and lower again shortly before reaching the maximum opening position. As a result, the flap can be easily fixed in the maximum opening position, in particular if the instantaneous pole displaces shortly before reaching the maximum opening position in the direction of the first axis of rotation of the support lever.

In one embodiment, the control element for the control lever is designed as a gear. The gear may be in engagement with another gear which is rotatably disposed with the support lever about the first axis of rotation. Then the further gear and the gear are driven via pivoting of the support lever, which is pivotally connected to the control lever, so that an exact movement of the control lever is specified. Instead of a gear, the control can also be designed as a further lever, the training as a gear has the advantage that this can be driven by another gear.

Preferably, an energy accumulator is provided, the flap in a

Closed position biased in the closed position and in an opening area in the open position. As a result, the flap for the user can operate smoothly, since this only initially overcome the force of the energy storage when pivoting the flap from a closed position, which then supports after overwriting a dead center the user when opening, and it is also possible that the flap automatically pivoted in an opening range by an opening position by the energy storage. During the closing process, the force of the energy accumulator must be overcome until the energy accumulator then biases the flap again in the closing direction. For easy operation while a handle element can be arranged on the flap in the open state of the flap below the flap and facing the operator. The invention will be explained below by means of an embodiment with reference to the accompanying drawings. Show it :

Figure 1 is a perspective view of an inventive

Furniture 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; Figures 1 0 to 1 3 are schematic views of a piece of furniture with a flap fitting according to the invention, in which the path of the instantaneous pole of the axes of rotation at the connection of the flap is located, and Figure 14 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. they are. 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 forms of housing can also be used for the housing 5.

In Figures 3A and 3B, the flap 3 is shown in an open position. The flap 3 has been pivoted with an upper portion forward away from the furniture body 2, while a lower portion of the flap 3, on which an unillustrated handle member is mounted, has been pivoted substantially vertically upward. 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 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. About the axis of rotation 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 12 on the housing 5.

At the second gear 1 1 spaced from the axis of rotation 12 of the gear 1 1, a rotation axis 70 is provided, on which the control lever 7 is rotatably mounted GE. The control lever 7 is at the opposite end to a

Rotary axis 71 rotatably mounted 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 store 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. On the holder 1 8, a receptacle 1 9 is provided, on which the rod 23 of the force accumulator 20 is fixed, so that the holder 1 8 is biased by the force 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.

At the receptacle 1 9 of the holder 18 different positioning options for the positioning of the rod 23 of the energy accumulator 20 are formed, so that even by choosing a suitable position an optimal presetting of the spring action on the weight forces to be compensated for the flap 3 can be done. 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 fastener 31 side is a Contact surface 32 is provided, for example, a contact roller, which can be contacted by an actuating element 33 on the holder 1 8.

For an opening operation, a handle arranged in the lower region of the flap 3 is actuated by a user in order to move the flap 3 forwards and upwards. In Figure 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. The rotation of the toothed wheel 10 also drives the third toothed wheel 1 3 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 portion of the flap moves substantially vertically upward just 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 ratio in order to even better match the tensioning and unloading of the energy accumulator 20 to the weight of the flap 3 and other parameters.

In the figures 1 0 to 13, the kinematics of the flap fitting 4 according to the invention is shown schematically. In Figure 10, the flap 3 is in one

Shown in the closed position, and the support lever 6 and the control lever 7 are arranged within the furniture body 2, wherein the support lever 6 is rotatably mounted about a stationary rotation axis 60 together with the designed as a control gear 1 0. The control lever 7 is mounted about an axis of rotation 70 which changes during the opening movement of the flap 3 and in the illustrated embodiment is rotatable on a gear 1 1. However, it is also possible to provide the axis of rotation 70 on a toggle lever instead of a gear 1 1. In addition, the support lever 6 is rotatably supported via a rotation axis 61 and the control lever 7 via a rotation axis 71 at a connection to an inner side of the flap 3, wherein the connection 9 can be formed either one or more parts. In FIG. 10, a grip element 40 is further shown, which is mounted on an outer side of the flap 3 in a lower region, a grip section of the grip element 40 being arranged above a lower end edge of the plate-shaped flap 3.

Alternatively, the grip element 40 can also be arranged on the end face of the flap 3, for example in the form of a profile rail, preferably with an engagement possibility or an undercut.

The intersection of the first connection line L1 connecting the rotation axes 60 and 61 and the second connection line L2 connecting the rotation axes 70 and 71 designate the instantaneous pole M of the door 3, which is from a closed position in a maximum opening position along a relative to the furniture body 2 stationary train B runs. The instantaneous pole M is provided in each opening position spaced from the handle member 40, so that jamming in an opening or closing movement can be safely avoided. The distance of the grip element 40 to the instantaneous pole M is greater than the length of the support lever 6 in the closed position of the flap 3. If now the flap 3 is moved by the grip element 40 in the opening direction, the flap 3 enters a position shown in FIG. 11. The instantaneous pole M has moved upwards and towards a front side, wherein the distance between the instantaneous pole M and the gripping element 40 is still greater than the length of the support lever 6. In a further opening movement, the instantaneous pole M continues to rise, as shown in FIG 1 2 is shown. In this position, the instantaneous pole M is already arranged above the gripping element 40, the instantaneous pole M scarcely remaining vertical in this opening region, but essentially horizontal towards the furniture body 2.

The maximum opening position of the flap 3 is shown in FIG. The instantaneous center M has no longer been moved upwards in the last opening area, but drops off slightly along the path B and only moves toward the furniture carcass 2. Even in the maximum opening position, the distance of the instantaneous pole M from the axis of rotation 60 is greater than the distance of the handle element 40 from the axis of rotation 60. This is fulfilled for the entire opening area of the flap 3, wherein the distance of the instantaneous center M from the axis of rotation 60 preferably to at least 20%, in particular at least 40%, is greater than the distance of the grip element 40 from the axis of rotation 60 in order to ensure a smooth movement.

The flap fitting 4 points from a certain opening angle of the flap

3 a kinematic self-locking, d. H. the flap 3 remains at a certain opening angle without spring support in an end position.

As the kinematics of Figures 1 0 to 1 3 shows, the flap 3 can be opened so far with a small horizontal force until the support by the energy storage device 20 engages and the flap 3 spring-assisted opens further. For the closing operation, the user then has to pull the grip element 40 down until the force of the force accumulator 20 has been overcome and the flap is then automatically pulled into the closed position via the energy accumulator. In FIGS. 1 to 9, a flap fitting 4 is fastened to the inside of a side wall of a furniture carcass 2. In Figure 14, the flap fitting

4 not integrated on an inside 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 made of a wood material, adjacent to which the housing 5 the flap fitting 4 is arranged, either over the entire width of the core material 80 or at a recess of the core material 80, which extends over only a 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

1 6 Curve guide

17 guide element

18 holders

19 recording

20 energy storage

21 spring

22 spring holder

23 pole

24 penholder

25 attachment

30 dampers

31 fastener

32 contact area

33 actuator

40 handle element

50 side wall

51 sidewall

52 spacers

60 axis of rotation

61 axis of rotation

70 axis of rotation

71 axis of rotation 80 core material

81 outer layer

82 inner layer

83 attachment points

B train

M momentary pole

L1 first connection line

L2 Second connection line

Claims

claims

1 . 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) about a first axis of rotation (60 ) is rotatably mounted, and the support lever (6) via a second axis of rotation (61) with a connection (9) with a flap (3) is connectable, and a control lever (7) via a third axis of rotation (71) via the Connection (9) with the flap (3) is connectable, wherein the control lever (7) via a fourth axis of rotation (70) hingedly connected to a control element (1 1) and the base body (5), and the flap (3) via a handle element (40) is pivotable, characterized in that a Momentanpol (M) of the flap (3) in a closed position below the handle element (40) and in a maximum opening position above the grip element (40) is arranged.

2. flap fitting according to claim 1, characterized in that a path (B) of the instantaneous pole (M) at an opening movement of the flap (3) spaced from the handle element (40).

3. flap fitting according to claim 1 or 2, characterized in that in the closed position of the flap (3), the distance from the handle element (40) to the instantaneous pole (M) is greater than the length of the support lever (6).

4. flap fitting according to one of the preceding claims, characterized in that the distance of the instantaneous pole (M) of the handle element (40) over the entire web (B) of the instantaneous pole (M) at an opening movement of at least 50%, preferably at least 70%, the distance of the handle element (40) from the first axis of rotation (60).

5. flap fitting according to one of the preceding claims, characterized in that a path (B) of the instantaneous pole (M) at an opening movement of the flap (3) initially extends arcuately upwards and lowers shortly before reaching the maximum opening position.

6. flap fitting according to one of the preceding claims, characterized in that the control element (1 1) is designed as a gear.

7. flap fitting according to claim 6, characterized in that the

Gear in engagement with a gear (10) which is non-rotatably arranged with the support lever (6) about the first axis of rotation (60).

8. flap fitting according to one of the preceding claims, characterized in that an energy accumulator (20) is provided which biases the flap (3) in a closed position in the closed position and / or the flap (3) in an opening region in the opening direction.

9. flap fitting according to claim 8, characterized in that the

Power storage (20) via a rotatably mounted control disc (15) with a gear (13) is coupled, which by a pivoting of the flap (3) can be driven.

10. flap fitting according to one of the preceding claims, characterized in that at least one damper (30) is provided, by means of which an opening and / or closing movement of the flap (3) can be braked before reaching an end position.

1 1. Flap fitting according to one of the preceding claims, characterized in that the handle element (40) of the flap (3) in the opened state of the flap (3) points downwards in the direction of the operator.

12. Furniture, with a body (2) on which a flap (3) is pivotally mounted, characterized in that the flap over two flap fittings (4) according to one of the preceding claims on the body (2) is held.