WO2017186737A1

WO2017186737A1 - Ejection device for a moveable furniture part, furniture part and method for opening and closing a moveable furniture part

Info

Publication number: WO2017186737A1
Application number: PCT/EP2017/059828
Authority: WO
Inventors: Stefan Klaus
Original assignee: Paul Hettich Gmbh & Co. Kg
Priority date: 2016-04-28
Filing date: 2017-04-25
Publication date: 2017-11-02
Also published as: DE102016107919A1; EP3448205B1; CN109152480A; CN109152480B; ES2818735T3; EP3448205A1

Abstract

The invention relates to an ejection device (6, 6') for a moveable furniture part (3) comprising a drive element (19, 19') pretensioned by at least one spring (15), by means of which the moveable furniture part (3) can be moved from a closed position into an open position, wherein, with a closing or opening movement of the furniture part (3) along a path, the at least one spring (15) can be moved into a tensioned position and the furniture part (3) can be engaged in the closed position with the at least one tensioned spring (15), wherein a return stop is provided that limits a closing or opening movement of the moveable furniture part (3), when the tensioning of the spring (15) during a closing or opening movement of the furniture part (3) is not yet completed, and wherein an opening damper is provided which generates damping forces for decelerating the moveable furniture part (3) during the ejection of the moveable furniture part (3). The invention also relates to a piece of furniture comprising an ejection device of this type, and to a method for opening and closing a moveable furniture part (3).

Description

Discharge device for a movable furniture part, furniture part and method for opening and closing a movable furniture part

The present invention relates to an ejection device for a movable furniture part with a biased by at least one spring drive element by means of which the movable furniture part is movable from a closed position to an open position, wherein in a closing or Öffnungsbewe- movement of the furniture part along a path that at least one Spring is movable to a cocked position and the furniture part in the closed position with the at least one tensioned spring is latched, wherein a backstop is provided which limits an opening or closing movement of the movable furniture part when the tensioning of the spring in a closing or opening movement the furniture part has not been completed, as well as a piece of furniture with such an ejection device and a method for opening and closing a movable furniture part.

DE 20 2006 012 976 U1 discloses a lockable ejection device which comprises a locking device which prevents ejection of the movable furniture part before completion of the charging process of the energy accumulator. Such a locking device or backstop can be used, for example, in push-to-open hardware to prevent ejection of the drawer during a closing movement when a force storage device of a knockout device is not fully charged. For fixing, a clamping member is keyed to a abutting portion of a locking device to prevent opening movement. However, the friction and clamping forces can be insufficient, especially in heavier furniture parts, such as loaded drawers.

It is therefore an object of the present invention to provide an ejection device for a movable furniture part and a method for opening and closing a movable furniture part, which ensure improved handling of the movable furniture part when opening and closing.

This object is achieved with an ejection device having the features of claim 1 and a method for opening and closing a movable furniture part with the features of claim 12. According to the invention, the ejection device comprises, on the one hand, a backstop to prevent ejection or retraction of the movable furniture part when the at least one spring is not completely tensioned, and additionally an opening damping, which generates damping forces for braking the movable furniture part when the movable furniture part is ejected. The opening damping ensures that the movable furniture part is ejected in the opening direction largely independently of a load with a similarly high speed. If the movable furniture part has only a small weight or is only slightly loaded, the at least one spring would accelerate the movable furniture part more when ejecting, so that the opening damping ensures braking. By contrast, a heavier piece of furniture is only accelerated to a lesser extent by the spring, so that similarly high ejection speeds can be obtained, regardless of the load. In addition, at least one spring can be used as the force store, which can also eject heavy weights in the case of the movable furniture part.

Preferably, the damping force at the opening loss is speed-dependent, and at higher ejection speed higher damping forces are generated than at lower ejection speeds. Such an opening damping can be done for example via one or more rotary damper. Instead of a rotary damper and linear damper, in particular air damper, oil damper or damper with other damping fluids can be used.

According to one embodiment, the ejection device has a housing with a first toothed rack, which can be brought into engagement with a pinion for the function of the backstop. By setting the pinion this can prevent ejection of the movable furniture part in an interruption of the clamping process. In addition, a second rack may be provided on the housing, which is engageable with the pinion for the function of the opening damping. The pinion can drive a rotary damper.

Preferably, the backstop comprises a guided in a guideway pinion, via which the rotary damper is driven. To couple the rotary damper to the pinion, it is preferable to provide a gear which is movable to generate a damping force relative to the pinion. The opening damping is preferably carried out with a freewheel in the closing direction. For this purpose, a movable carriage having an element for activating the opening damping, which is effective only in the opening direction. The element may for example be designed as a blocking element, by means of which a gear is prevented from rotating relative to the pinion.

Preferably, the ejection device may be combined with a self-closing device, as known in the art. The Selbsteinzugsvorrichtungen may be designed separately from the ejector or form a unit with the ejector. When closing or opening the drawer, the spring of the ejector is tensioned and after or during the tensioning and locking of the spring, the self-closing device can move the drawer to the closed position. In addition, a Selbsteinzugsvorrichtung optionally also slow down a closing movement of the movable furniture part.

Preferably, the ejection device may have different charging principles for the at least one spring. This means that the at least one spring of the ejection device can be loaded after opening the movable furniture part, for example when closing. Alternatively, the ejector may eject the movable furniture member to a first open position, and then the user may manually move the movable furniture member further in the opening direction to a second open position, such as a drawer. Then, this opening movement can be used from the first to the second opening position for clamping the at least one spring, so that the backstop in this case can be effective during an opening movement of the movable furniture part.

According to the invention a piece of furniture is provided with an ejection device, wherein the movable furniture part can optionally be designed as a drawer, sliding door, flap or other furniture part.

In the method according to the invention, after unlocking the movable furniture part, this is ejected via at least one ejection device with a spring in the opening direction, the opening movement being braked via an opening damping, so that control of the ejection speed is achieved via the opening damping. Subsequently, the movable furniture part is moved in the closing or opening direction, wherein the at least one spring is tensioned and in an interruption of the closing movement is limited by a backstop an ejection of the furniture part, which simplifies handling, since the closing movement can be resumed at a later date. The invention will be explained in more detail below with reference to an embodiment with reference to the accompanying drawings. Show it:

Figures 1 and 2 show two views of a piece of furniture according to the invention with a

Ejector, and

Figures 3 to 6 show several views of an ejection device according to the invention in different positions.

A piece of furniture 1 comprises a furniture body 2, in which a movable furniture part 3 in the form of a drawer can be inserted, wherein a front panel 4 is arranged on an open side of the furniture body 2. The drawer is movably mounted on two pullout guides 5, which are arranged on opposite side walls of the furniture body 2. Each pullout guide 5 is arranged in a side frame 8 and fixed by a bracket 9 and supports the drawer via a movable running rail. Furthermore, 2 angle-shaped carrier 7 are fixed to the furniture body, which cooperate with an ejector 6 for the movable furniture part 3. When the front panel 4 is pressed in the closing direction towards the furniture body 2, an unlocking can take place via the ejection device 6 in order then to eject the drawer in the opening direction by the force of at least one spring. When the drawer is moved in the closing direction, the at least one spring of the ejector 6 is stretched again.

In Figure 2, the ejector devices 6 are mounted on an underside of the bottom of the drawer and cooperate with the angular drivers 7. It is also possible to let the ejector 6 with other movable furniture parts, such as sliding doors, flaps or doors, interact or to fix the ejector 6 to the furniture body 2 or a fixed part of the pullout guide and the ejection of a movable furniture part or on a movable part of the drawer guide arranged to cause driver.

In Figure 3, the ejector 6 is shown in detail, which has a backstop and an opening loss. The ejection device 6 comprises a Housing 1 0, on which a first rack 1 1 is formed for the backstop. On the housing 1 0, a guide track 1 2 is further provided, in which an axis of a pinion 14 is guided. The guideway 1 2 comprises a loop-shaped portion, on which a first guide track 1 2A for the opening movement and a second guide track 1 2B are provided for the closing movement. The guideway 1 2B is located closer to the first rack 1 1 as the guideway 1 2A.

On the housing 1 0, a linearly movable carriage 1 3 is provided, which has a ne curve guide 1 8, in which an axis of the pinion 14 is inserted.

As a result, the pinion 14 can be moved together with the carriage 1 3 along the guide track 1 2. The carriage 1 3 is further biased by a spring 1 5, which is fixed with a first end 1 6 on the carriage 13 and at a second end 27 on the housing 1 0. The spring 1 5 is designed as a tension spring to the To stretch carriage 1 3 in Figure 3 to the right, wherein the spring can be formed in a modified arrangement 5 5 as a compression spring.

On the carriage 1 3, a drive element is further provided in the form of a projection 1 9, which can enter into engagement with the angular driver 7 to move the carriage 1 3 relative to the housing 1 0. For transmitting the forces of the carriage 1 1 on the movable furniture part 3 and vice versa various alternatives are known in the art, which can be used here.

In FIG. 3, the ejection device 6 is in an opening position, in which the pinion 14 is arranged on an end section 28 of the guide track 1 2. Now, if the movable furniture part is moved in the closing direction and impinges on the driver 7, the carriage 1 3 is moved against the force of the spring 1 5 to the left, and the guided in the cam guide 1 8 pinion strikes a run-on slope 29 and enters the guide track 1 2B adjacent to the rack 1 1, as shown in Figure 4. In another closing movement, the spring 1 5 is stretched. If this closing operation is now interrupted, a locking element 1 7 in the form of a toothed rod or a projection is provided on the carriage 1 3, which can get into engagement with the pinion 14. The pinion 14 is held on an L-shaped cam guide 1 8 on the carriage 1 3, so that adjacent to the rack 1 1, when the pinion is guided in the guide track 1 2B, the locking member 1 7 is movable relative to the pinion 14 and this can set to a Drehbe- to prevent movement. As a result, ejection of the movable furniture part 3 is prevented when the pinion 14 along the rack 1 1 is fixed by the locking member 1 7. If this is to be resumed after the interruption of the clamping process, the carriage 1 3 is moved further in the closing direction, so that the locking element 1 7 is lifted from the pinion 14. Subsequently, the pinion 14 can be moved along the guideway 1 2B further in the closing direction until the pinion 14 is lifted from the rack 1 1 to be fixed to a latching or holding portion 22. At the latching and holding portion 22, a slider 20 is provided with a locking receptacle 21 which holds the pinion in a closed position. The slider 20 is biased by a spring 23 to the holding portion 22 and the pinion 14 set. The closed position is shown in FIG.

In order to unlock the pinion 14 from the closed position, the movable furniture part is pressed or pushed, so that the slider 20 is lifted against the force of the spring 23 of the holding portion 22. As a result, the pinion 14 can enter the guide track 12A, which is provided for an opening movement. Adjacent to the track 12A is a second rack 25 that drives the pinion 14 for rotational movement. In order not to move the movable furniture part 3 too quickly in the opening direction by the force of the at least one spring 15, an opening damping is provided which has a rotational damper which is provided between the pinion 14 and a gear 31. The gear 31 can be fixed by a locking element during an opening movement, wherein the locking element is designed as a rack portion 30 which is integrally formed on the carriage 1 3. When the pinion 14 moves together with the gear 31 along the cam guide to the guide track 1 2A, the pinion 14 is engaged with the second rack 25 and the gear 31 in engagement with the rack portion 30. While the pinion through the rack 25 for a rotary motion is driven, holds the rack portion 30, the gear 31 rotatably. Thereby takes place a relative movement between the pinion 14 and the gear 31, which moves a arranged on the pinion 14 rotational damper and generates damping forces. The damping forces are higher, the greater the speed of the pinion 14 relative to the gear 31, so that at higher ejection speeds higher damping forces are generated as at lower output speeds. The opening damping is released when the pinion 14 is removed from the guide track 12A and the gear 31 is disengaged from the rack section 30. Alternatively, the opening damping can be started when the rack 25 starts or ends. The length of the path for the opening damping can be adjusted by selecting the length of the rack 25. The pinion is now transferred back into the end portion 28, and the movable furniture part 3 is in an open position and can be moved independently of the ejector 6.

LIST OF REFERENCE NUMBERS

1 furniture

2 furniture carcass

3 furniture part

4 front panel

5 pullout guide

6 ejection device

7 drivers

8 side frame

9 brackets

10 housing

1 1 rack

12, 12A. 12B guide book

13 sleds

14 pinions

15 spring

1 6 end

17 locking element

18 curve guide

19 advantage

20 slides

21 snap-in receptacle

22 holding section

23 spring

25 rack

27 end

28 end section

29 starting slope

30 rack section

31 gear

Claims

claims

1 . Ejection device (6, 6 ') for a movable furniture part (3), with a

by at least one spring (15) biased drive element (19, 19 '), by means of which the movable furniture part (3) is movable from a closed position to an open position, wherein at a closing or opening movement of the furniture part (3) along a path the at least a spring (15) is movable into a tensioned position and the furniture part (3) in the closed position with the at least one tensioned spring (15) can be latched, wherein a backstop is provided which an opening or closing movement of the movable furniture part (3) limited, when the tensioning of the spring (15) in a closing or opening movement of the furniture part (3) is not yet completed, characterized in that an opening damping is provided, the damping forces for braking the movable furniture part when ejecting the movable furniture part (3) (3) generated.

2. Ejecting device according to claim 1, characterized in that the

Damping forces are speed-dependent and at higher ejection speeds higher damping forces are generated than at lower ejection speeds.

3. Ejecting device according to claim 1 or 2, characterized in that the opening damping comprises a rotary damper.

4. Ejecting device according to one of the preceding claims, characterized in that on a housing (10) has a first rack

(1 1) is provided, which is engageable with a pinion (14) for the function of the backstop.

5. Ejecting device according to claim 4, characterized in that on the housing (10) a second rack (25) is provided, which is engageable with the pinion (14) for the function of the opening damping.

6. Ejecting device according to claim 4 or 5, characterized in that the backstop in a guide track (12) guided pinion (14), via which the rotary damper is driven.

7. Ejecting device according to one of the preceding claims, characterized in that the opening damping comprises a gear (31) which is movable for a damping movement relative to the pinion (14).

8. Ejecting device according to one of the preceding claims, characterized in that on a movable carriage (13), an element (30) is provided for activating the opening damping, which is effective only in the opening direction.

9. Ejecting device according to claim 8, characterized in that

the element (30) is a blocking element by means of which a toothed wheel (31) is prevented from rotating relative to a pinion (14).

10. Furniture with a movable furniture part (3) in the form of a drawer

or a sliding door, characterized in that the movable furniture part (3) with an ejection device (6) according to one of the preceding claims is movable.

1 1. Ejecting device according to one of the preceding claims, characterized in that the ejection device is combined with a separate or integrated self-closing device.

12. Furniture with a movable furniture part as a door or as a flap, characterized in that the movable furniture part with an ejection device (6) according to one of claims 1 to 9 is movable.

13. Method for opening and closing a movable furniture part (3),

in particular a drawer, with the following steps:

- Unlocking the movable furniture part (3) from the closed position;

- Ejecting the movable furniture part (3) via at least one ejection device (6) with at least one spring (15) in the opening direction, wherein the opening movement is braked by an opening damping;

- Moving the movable furniture part (3) in the opening or closing direction and clamping the at least one spring (15), wherein at an interruption of the opening or closing movement ejection of the furniture part (3) in the opening direction is limited by a backstop, and

- Moving the movable furniture part (3) in the closed position.