EP3945936B1 - Retraction or ejection device - Google Patents

Description

The present invention relates to a retraction or ejection device, in particular for a movable furniture part, with a housing on which at least one guideway for a movable driver that is pretensioned by an energy store is formed, the at least one guideway having a linear section and an angled parking section , on which the driver can be locked when the lift mechanism is tensioned.

the DE 10 2013 107 562 A1 discloses a guide device for a movable furniture part, in which a feed or ejection device is provided which has a housing with two different guide tracks. An adjusting means is provided on the driver, so that either the first guideway or the second guideway is used to guide the driver. As a result, the length of the guide track can be adjusted in order to adapt to the weight, the travel distance or other parameters of the movable furniture part. However, the movable adjusting means formed by a pin can only make a choice between two rigid guideways, so that the setting options are limited.

the EP 2 549 904 B1 discloses a self-closing device in which an energy store has at least two segments and the functional length of the energy store can be adjusted by a fixing element. This allows the adjustment of spring forces to the self-closing, but the length of a guideway for the self-closing remains constant.

the DE 20 2010 013193U U1 discloses a guide device for movable furniture parts, with an adjustment mechanism to set the length of a braking or acceleration path of the guide device, which allows adaptation to different weights of movable furniture parts.

It is therefore the object of the present invention to create a retraction or ejection device that can be flexibly adapted to the weight of a movable furniture part.

This object is achieved with a feed or ejection device having the features of claim 1.

In the case of the retraction or ejection device according to the invention, a driver is prestressed by an energy accumulator and guided along at least one guideway which has a linear section and an angled parking section. The linear section of the guideway is made of at least formed of two parts which are adjustable relative to each other to adjust the length of the linear portion of the guideway. This allows the guideway to be changed in length by adjusting the two parts, which leads to a longer or shorter travel path of the driver along the linear section, which can brake or accelerate the movable furniture part in this area, depending on the direction of action of the force accumulator. This enables flexible adaptation, for example to the installation depth or the weight of the movable furniture part, without the retraction or ejection device having to be structurally modified.

Preferably, the retraction or ejection device includes a first part that forms the angled parking section of the guide track and is adjustable. The first part can be guided and adjusted linearly on the housing. The second part is preferably formed by a portion of the housing such that part of the track is integrally formed with the housing.

The at least one guide track is preferably formed by a slot or a groove. It is also possible for several guideways to be arranged next to one another, which guide the same driver, so that it is guided in a particularly stable manner. Optionally, only a single guideway can be provided.

The length of the linear section can preferably be shortened by at least 20%, in particular between 30% and 60%, based on the longest position. In this case, the linear section can be formed in a short position by overlapping webs or channels, which are arranged with only little or no overlap in an extended position.

In order to fix the adjustable part of the guideway, a catch can be provided, for example in the form of teeth, by means of which the adjusted part is held in position relative to the other part. Instead of locking, other adjusting means can also be used, such as worm gears, threaded bolts or other adjusting means. A stepless adjustment of the adjustable part can thus be effected by means of rotatable adjustment means.

In a further embodiment, means are provided for adjusting the force of the force accumulator. Then not only the length of the guide track can be changed, but also the force applied by the energy accumulator.

For this purpose, the force accumulator can be adjusted together with the first part, for example. Alternatively or additionally, adjusting means can be provided in order to adjust the force of the force accumulator, for example by shortening or lengthening a spring.

For an adjustment process, the adjustable part preferably has an actuating section which can be moved against the force of a spring bar, in order then to be able to adjust the part relative to the housing. This enables a simple adjustment when using only a few components, in particular when the spring bar is formed integrally with the adjustable part.

Alternatively, the first part can also be positioned by at least one additional plug-in element, which is connected to the first part at a receptacle of the housing. Such male elements can have different markings or markings to determine the specific position of the first part and to indicate the length of the guide track.

The retraction or ejection device according to the invention is preferably used as a self-retraction device, in particular in the case of a pull-out guide for furniture or household appliances. Then the length of the feed path can be adjusted accordingly.

Figur 1

eine perspektivische Ansicht einer Auszugsführung mit einer Einzugsvorrichtung;

Figur 2

eine perspektivische Explosionsdarstellung der Auszugsführung mit der Einzugsvorrichtung der Figur 1;

Figur 3A

eine perspektivische Explosionsdarstellung der Einzugsvorrichtung der Figur 2;

Figur 3B

eine perspektivische Ansicht eines Bauteils aus der Figur 3A;

Figuren 4A und 4B

zwei Ansichten der Einzugsvorrichtung der Figur 3A in unterschiedlichen Positionen;

Figuren 4C und 4D

zwei Ansichten der Einzugsvorrichtung der Figur 3A, teilweise im Schnitt;

Figuren 5A und 5B

zwei Ansichten der Einzugsvorrichtung der Figur 3A in unterschiedlichen Positionen;

Figuren 6A und 6B

zwei Ansichten einer modifizierten Einzugsvorrichtung;

Figur 7

eine perspektivische Explosionsdarstellung der Einzugsvorrichtung der Figur 6;

Figuren 8A und 8B

zwei Ansichten der Einzugsvorrichtung der Figur 7 in unterschiedlichen Positionen;

Figuren 9A und 9B

zwei Ansichten einer modifizierten Einzugsvorrichtung;

Figur 10

eine perspektivische Explosionsdarstellung der Einzugsvorrichtung der Figur 9;

Figuren 11A und 11B

zwei Ansichten eines weiteren Ausführungsbeispiels einer Einzugsvorrichtung;

Figur 11C

eine perspektivische Ansicht eines Bauteils aus der Figur 11A;

Figur 12

eine perspektivische Ansicht der Einzugsvorrichtung der Figur 11, und

Figuren 13A und 13B

zwei Ansichten der Einzugsvorrichtung der Figur 12 in unterschiedlichen Positionen.

The invention is explained in more detail below using several exemplary embodiments with reference to the accompanying drawings. Show it:

figure 1

a perspective view of a pull-out guide with a retraction device;

figure 2

an exploded perspective view of the pull-out guide with the retraction device figure 1 ;

Figure 3A

an exploded perspective view of the retraction device figure 2 ;

Figure 3B

a perspective view of a component from FIG Figure 3A ;

Figures 4A and 4B

two views of the retraction device Figure 3A in different positions;

Figures 4C and 4D

two views of the retraction device Figure 3A , partly in section;

Figures 5A and 5B

two views of the retraction device Figure 3A in different positions;

Figures 6A and 6B

two views of a modified retraction device;

figure 7

an exploded perspective view of the retraction device figure 6 ;

Figures 8A and 8B

two views of the retraction device figure 7 in different positions;

Figures 9A and 9B

two views of a modified retraction device;

figure 10

an exploded perspective view of the retraction device figure 9 ;

Figures 11A and 11B

two views of another embodiment of a collection device;

Figure 11C

a perspective view of a component from FIG Figure 11A ;

figure 12

a perspective view of the retraction device figure 11 , and

Figures 13A and 13B

two views of the retraction device figure 12 in different positions.

A pull-out guide 1 comprises a stationary rail 2 and at least one movable rail 3, on which a sliding element is held. An activator 6 is fixed to the rail 3 and is in engagement with a driver 7 of a retraction device 4 over a certain distance of the travel path of the rail 3 . The retraction device 4 comprises a housing 5 on which the driver 7 is held so that it can be moved along at least one guide track.

In figure 2 it can be seen that the activator 6 has a projection which can be inserted into a receptacle in the driver 7 . The driver 7 is pretensioned in the closing direction of the pull-out guide 1 by an energy accumulator 8 in the form of a spring, in particular a helical spring. In addition, a damper 9 is provided, which is designed as a linear damper and brakes a closing movement of the rail 3 before the closed position is reached.

In Figure 3A the retraction device 4 is shown in detail. The housing 5 includes a receptacle 50 for the energy accumulator 8, which is fixed with a first end 80 on a holder 51. An opposite end 81 of the force accumulator 8 is fixed to a holder 72 of the driver 7 . Also provided on the housing 5 is a receptacle for the damper 9 which is fixed at one end 90 to a mount 52 and at an opposite end 91 of the damper housing to a further mount 53 of the housing 5 . The damper 9 includes a piston rod 92 that can be moved out of the damper housing, which rests against a contact surface of the driver 7 and brakes it when it moves in the closing direction.

The driver 7 includes a receptacle 70 for inserting the projection of the activator 6, with a starting bevel 71 being provided adjacent to the receptacle 70 so that the activator 6 can engage in the receptacle 70 of the activator 7 when moving in the closing direction. Guide elements are also formed on the driver 7 , in particular pins or projections which engage in at least one guide track on the housing 5 . Two linear sections 55 and 56 of two adjacent guideways are formed on the housing 5, the linear sections 55 and 56 being formed by slots into which the guide elements of the driver 7 engage.

Furthermore, a first part 10 is provided, which can be adjustably mounted on the housing 5 . A linear section 11 of a guide track is formed on the first part 10 between two webs 12 and 13 , which ends at an angled parking section 14 which is formed integrally with the first part 10 . Furthermore, a second linear section for a guideway is formed by the web 13, on the end of which an angled parking section 15 is formed in the form of a receptacle for a guide element. The first part 10 further comprises at least one spring bar 16 which is supported on a wall 54 of the housing 5 and biases the first part 10 away from the wall 54 so that at least one projection 18, in Figure 3B in the form of a rack section shown, on the first part 10 engages in a toothing 57 on the housing 5 . The first part 10 can be pressed against the force of the spring bar 16 by engaging an actuating section 17 in order to then be linearly adjusted along the housing 5 .

In Figure 4A the retraction device 4 is shown in a position in which the first part 10 is arranged on the housing 5 in such a way that the guideway is short. For this purpose, the linear section 56 on the housing and the linear section 11 on the first part 10 overlap Figure 4A End position shown only a short distance, for example between 20 to 40 mm, until it arrives through the guide elements at the angled parking section 14 or 15 to pivot there and release the activator 6. If the length of the feed path is to be changed and adapted to a corresponding movable furniture part, the first part 10 can be gripped at the actuating section 17 in order to press it into the housing 5 against the force of the spring bar 16 and linearly from it Figure 4A to move to the right until, for example, the in Figure 4B the position shown is reached, in which the first part 10 has been adjusted and is fixed to the teeth 57 of the housing 5 . In this position, the overlap of the linear sections 11 and 56 is shorter and the linear section has been lengthened by cascading the linear section 56 on the housing and the linear section 11 on the first part 10. Accordingly, the linear section 55 was also lengthened by moving the first part 10, since the angled parking section 15 was also adjusted in a similar way to the angled parking section 14.

In Figure 4C the housing 5 is partly in section according to FIG Figure 4D shown. The first part 10 is arranged in the housing 5 with the guideway on the part 11 and on the housing 5 overlapping at the linear section 11 . The driver 7 engages both in the guide track on the part 11 and on the housing 5 with its guide webs.

In Figure 5A the retraction device 4 is shown in a position in which the driver 7 has been displaced along the linear sections 55 and 56 on the housing and is now held on the two angled parking sections 14 and 15 of the first part 10, with the energy accumulator 8 being tensioned and the driver 7 was pivoted to release the activator 6.

the Figure 5A corresponds to the position of the first part 10 according to Figure 4A .

In Figure 5B the driver 7 is shown in the position held on the first part 10, which has been adjusted to lengthen the guideway, as is shown in Figure 4B is shown. From the position with pivoted driver 7 according to Figures 5A and 5B the activator 6 can now pivot the driver 7 out of the locked parking position, as a result of which the energy store 8 then pulls the driver 7 into the retracted position, with the damper 9 braking the driver 7 via the piston rod 92. The feed path was almost doubled by adjusting the first part 10 from the shorter position. Accordingly, the force of the energy store 8 on the driver 7 was also significantly increased since the end 80 of the energy store 8 is fixed in the same position on the holder 51 . This generates higher forces on the driver 7 when the linear section of the guideway is lengthened.

In the Figures 6A and 6B a variant of the retraction device is shown, in which the force of the force accumulator 8 on the driver 7 in the tensioned position is the same, regardless of whether the guideway was lengthened or shortened by the first part 10. With regard to the retraction device 4, a change was made such that the energy accumulator 8 is not rigidly fixed to the housing 5, but rather in a shell-shaped receptacle 20 that has a holder 21 for fixing the end 80 of the energy accumulator 8. The cup-shaped receptacle 20 is supported on the opposite side on the first part 10 or is formed in one piece with the first part 10, so that with a shorter guideway according to FIG Figure 6A the energy accumulator 8 has a similar length as the energy accumulator 8 in Figure 4A . If the linear section of the guideway is lengthened by adjusting the first part 10 from the in Figure 6A shown position to the in Figure 6B shown position, the shell-shaped receptacle 20 is simultaneously moved with the first part 10, whereby the end 80 of the energy store 8 is moved to the driver 7. This ensures that in the parking position of the driver 7, when it is locked to the angled parking sections 14 and 15, the same force acts on the driver 7 through the force accumulator 8, regardless of the position of the first part 10 on the housing 5 is fixed.

In the exploded view of the figure 7 it can be seen that a holder 21 for the end 80 of the force accumulator 8 is formed on the shell-shaped receptacle 20 . Furthermore, a recess 22 is provided on the cup-shaped receptacle 20 through which the driver 7 on the holder 72 with the End 81 of the force accumulator 8 can be connected. On the opposite side, the first part 10 is arranged on an end face of a wall 23, and when the first part 10 is moved, the wall 23 remains in contact with the first part 10 due to the pretension of the force accumulator 8. In an alternative embodiment, the shell-shaped receptacles 20 and the first part 10 are integrally formed or coupled in a materially and/or form-fitting manner.

In Figure 8A is the retraction device Figure 6A shown in section. It can be seen that the driver 7 is in an end position with the energy accumulator 8 relaxed. If the first part 10 is now adjusted to lengthen the linear sections of the guideway, as is shown in Figure 8B is shown, the shell-shaped receptacle 20 moves with the holder 21, so that the force accumulator 8 is shortened as long as the driver 7 is in the end position. This ensures that the driver 7 is acted upon by the same force from the energy accumulator 8 after moving to the angled parking section 14 and 15 of the guideway in the parked position, as in the arrangement with the shorter linear section of the guideway according to FIG Figure 8A .

In the Figures 9A and 9B a modified embodiment of a retraction device is shown, in which the force of the force accumulator 8 is not rigid, but can be adjusted by an adjusting device. For this purpose, a rotatable adjusting means 32 is provided on the housing 5, which can adjust the position of the end 80 of the energy store 8 in the effective direction of the energy store 8. As a result, the length of the energy store 8 can be adjusted independently of the position of the first part 10 .

In figure 10 the adjusting device is shown in detail. A slide 30 is slidably held on a receptacle 37 of the housing 5, a holder 31 for fixing the end 80 of the force accumulator 8 being provided on the slide 30. FIG. The slide 30 has a guide web 35 which engages in a groove 36 on the housing 5 . Furthermore, a threaded opening 34 is formed on the slide 30, in which a threaded bolt 33 of the rotatable actuating means 32 engages. By turning the adjusting means 32, the slide 30, which is held non-rotatably on the housing 5, can be adjusted in the direction of action of the energy accumulator 8, with the length of the adjustment path being able to be longer than in FIG figure 10 shown. As a result, the force of the force accumulator 8 can be changed independently of the position of the first part 10 on the housing 5. Furthermore corresponds to the embodiment of the previous embodiments.

In the Figures 11A and 11B Another embodiment of a retraction device is shown, in which 5 plug-in elements 40, 140 and 240 are provided for positioning the first part 10 on the housing, which can each be pushed or plugged in with foot elements 41 in a groove 58 on the housing. Also provided on the plug-in elements 40 and 140 is a projection 42 which can be inserted into a receptacle 45 of the actuating section 17 on the first part 10 . Depending on the specified position of the projection 42, a length of the feed path can be indicated via a matching marking on the plug-in element 40, 140 and 240, so that the fitter knows whether the first part 10 is in the correct position for the corresponding piece of furniture. The opposite side of the part 10 with the receptacle 45 and the projection 18 is in the Figure 11C shown

In figure 12 the retraction device is shown with the plug element 40, which arranges the first part 10 in the desired position with the projection 42. To change the length of the linear section of the guideway, the plug-in element 40 can be removed in order to then engage the actuating section 17 of the first part 10 and press it into the housing 5 against the force of the spring bar 16 in order to adjust the first part 10. the first part 10 being held in position either via the toothing 57 or one of the plug-in elements 40, 140 or 240. After the adjustment process, another plug-in element 40, 140 or 240 can be fixed to the housing 5 and the first part 10.

In the Figures 13A and 13B is the retraction device figures 11 and 12 shown in section. It can be seen that the projection 42 engages in a receptacle 45 on the first part 10 and by pressing the plug-in element 40 the first part 10 can also be pressed into the housing 5 against the force of the spring bar 16 in order to undo the connection at the toothing 57 to solve. Then the first part 10 can be moved together with the plug-in element 40 along the groove 58, for example to the stop 59 on the right-hand side of the groove 58. The first part 10 is thereby positioned over the plug-in element 40. By changing the position of the projection 42 in relation to the length of the plug-in element 40 or 140, the positioning of the first part 10 can be undertaken via the plug-in element 40, 140 or 240. in the in Figure 11A illustrated embodiment is on plug-in element 240 no projection 42 has been formed, since this plug-in element is only intended to cover access to the actuating section 17 and the receptacle 45 to protect against unintentional adjustment. The position of the first part 10 can be set individually or correspond to a zero position.

In the exemplary embodiments shown, the retraction device is prestressed in the direction of retraction by a single force accumulator 8 . It is also possible to combine several springs to form an energy accumulator. In addition, instead of acting in the retraction direction, the energy accumulator 8 can also act in the opening direction, ie in the opposite direction, so that the retraction device then becomes an ejection device. Then, for example, the holder 51 would have to be arranged on the housing on the opposite side of the driver 7 .

In the exemplary embodiment shown, the driver 7 is guided along two adjacent guideways, it being possible for the respective linear section of the guideway to be lengthened or shortened by the first part 10 . It is also possible to provide only a single track on the feed or ejection device in order to guide the driver 7 . In addition, more than two guideways can also be provided.

The above exemplary embodiments can also be combined with one another as desired. The adjustment of the spring force by an adjusting means 32 can be used, for example, in all of the exemplary embodiments.

In addition, other mechanisms can be used to fix the first part 10 on the housing 5 in the adjusted position. Instead of the toothing 57, holes or other fastening means can also be provided.

reference list

1

drawer guide

2

rail

3

rail

4

retraction device

5

Housing

6

activator

7

driver

8th

energy accumulator

9

mute

10

first part

11

linear section

12

web

13

web

14

park section

15

park section

16

spring bar

17

operating section

18

head Start

20

recording

21

bracket

22

recess

23

Wall

30

slider

31

bracket

32

setting means

33

threaded bolt

34

threaded opening

35

guide bar

36

groove

37

recording

40

plug-in element

41

foot element

42

head Start

45

recording

50

recording

51

bracket

52

bracket

53

bracket

54

Wall

55

linear section

56

linear section

57

gearing

58

groove

59

attack

70

recording

71

leading edge

72

holder

80

End

81

End

90

End

91

End

92

piston rod

140

plug-in element

240

plug-in element

Claims (13)

1. A retraction or ejection device (4), in particular for a movable furniture part, having a housing (5), on which at least one guide path for a movable driver (7) pretensioned by a force accumulator (8) is formed, wherein the at least one guide path has a linear section (11, 55, 56) and at least one angled parking section (14, 15), on which the driver (7) is lockable with tensioned force accumulator (8), characterized in that the linear section (11, 55, 56) of the guide path is formed from at least two parts, which are adjustable relative to one another to adjust the length of the linear section (11, 55, 56) of the guide path.
2. The retraction or ejection device according to Claim 1, characterized in that a first part (10) has the angled parking section (14, 15) and is adjustable.
3. The retraction or ejection device according to Claim 2, characterized in that the first part (10) is linearly guided on the housing (5) and is fixable.
4. The retraction or ejection device according to any one of the preceding claims, characterized in that a second part to form the linear section (55, 56) of the guide path is formed by the housing (5).
5. The retraction or ejection device according to any one of the preceding claims, characterized in that the guide path is formed by a slot or a groove.
6. The retraction or ejection device according to any one of the preceding claims, characterized in that the length of the linear section (11, 55, 56) of the guide path is adjustable by at least 20%, preferably between 30% and 60%.
7. The retraction or ejection device according to any one of the preceding claims, characterized in that a lock, in particular gear teeth (57), is provided to hold the two parts in an adjusted position after an adjustment procedure.
8. The retraction or ejection device according to any one of the preceding claims, characterized in that means (32) are provided for adjusting the force of the force accumulator.
9. The retraction or ejection device according to any one of Claims 2 to 8, characterized in that the adjustable first part (10) has an actuating section (17), which can move the first part against the force of a spring web (16) and then adjust it.
10. The retraction or ejection device according to any one of the preceding claims, characterized in that the position of the first part (10) is settable by at least one plug element (40, 140, 240), which is plugged on a receptacle on the housing (5).
11. The retraction or ejection device according to any one of the preceding claims, characterized in that at least two guide webs spaced apart from one another are formed on the two parts.
12. The retraction or ejection device according to any one of the preceding claims, characterized in that a rotatable adjusting means is provided for a continuous adjustment of the adjustable part (10).
13. A pullout guide having a retraction or ejection device (4) according to any one of the preceding claims.

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