BE1029640B1 - Lifting device for a washing basket - Google Patents

Abstract

The invention relates to a lifting device for a washing basket of a dishwasher, with a four-bar coupling mechanism (8) which has a coupling element (10) on the washing basket side, a base element (11) fixed on the machine side and a first and a second link (12, 13), the the two links (12, 13) are pivotably arranged at one end on the base member (11) on the one hand and on the other end on the coupling member (10) on the other hand, the coupling member (10) being arranged on a rail device (9) of the washing basket (5) and the four-bar linkage Coupling mechanism (8) is supplemented by a locking link (19) and a coupling link (20) to form a seven-bar coupling mechanism (18), the locking link (19) being arranged on the coupling link (10) such that it can pivot at one end and on the coupling link (20) so that it can pivot at the other end and wherein the coupling link (20) can be pivoted at one end on the first link (12) and at the other end can be pivoted on the locking link (19). is arranged.

Description

Description

Lifting device for a washing basket

The invention relates to a lifting device for a dishwashing rack of a dishwasher, with a four-bar coupling mechanism which has a coupling element on the dishwashing rack, a base element fixed on the machine side and a first and a second link, the two links being pivotably arranged at one end on the base element on the one hand and on the other end on the coupling element on the other hand are.

Washing baskets for dishwashers in general and lifting devices for the same

Rinsing baskets in particular are well known per se from the prior art, which is why separate printed evidence is not required at this point. Reference is therefore made to DE 20 2014 213 980 B4, EP 3 232 859 B1 and DE 10 2017 210 310 A1 only as an example.

A dishwasher of the typical design has a wash tub that provides a wash space. This is accessible to the user via a loading opening, which can be closed in a fluid-tight manner by means of a pivotably mounted washing compartment door. When used as intended, the rinsing tank serves as a

Accommodating items to be cleaned, such as crockery,

Cutlery parts and / or the like can act.

To load a dishwasher with items to be washed, a

Washware carrier used, which can be moved through the loading opening, either into or out of the wash cabinet, depending on

traversing direction. A dishwasher typically has two or three items to be washed, depending on the design. In general, the washing items are as

Rinsing baskets formed, with a typical design having a lower basket, an in

Height direction of the dishwasher arranged above upper rack and optionally a cutlery drawer arranged in the height direction above the upper rack are provided.

According to a common and commercially available kitchen design, a dishwasher is usually arranged in an upright position below a kitchen worktop. As a result, the lower basket is below the knee height of an adult when it is fully loaded or unloaded. The user can therefore only load or unload the lower rack as intended in a bent posture, which is perceived as disadvantageous, particularly when handling bulky and possibly heavy items to be washed, such as are typically placed in the lower rack.

In order to counteract this problem, lifting devices have become known from the prior art which make it possible to raise the lower basket to the level of an upper basket. It is such a user-side simplified loading and unloading of the

allows lower basket.

Although from the prior art previously known lifting devices in everyday

have proven themselves in practical use, there is a need for improvement, particularly with a view to even further simplifying user-side handling. It is therefore the object of the invention to structurally improve a generic lifting device to the effect that simplified handling by the user is made possible.

To solve this problem, a lifting device of the type mentioned is proposed with the invention, which is characterized in that the coupling member is arranged on a rail device of the washing basket and that the four-jointed

Coupling mechanism is supplemented by a locking link and a coupling link to form a seven-bar coupling mechanism, with the locking link being arranged on one end so as to be pivotable on the coupling link and on the other end so as to be pivotable on the coupling link, and with the coupling link being arranged on one end so as to be pivotable on the first link and on the other end so as to be pivotable on the locking link.

Of essential importance to the invention of the proposed lifting device is that instead of a four-bar linkage, a seven-bar linkage for

is used, and this in combination with a rail device.

In contrast to a previously known four-bar linkage, the seven-bar linkage provided according to the invention is supplemented by two links, namely the locking link on the one hand and the coupling link on the other. There are the

The locking link and the coupling link are pivotably connected to one another, and the locking link is also arranged on the coupling link and the coupling link is pivotable on the first link.

This configuration according to the invention provides numerous advantages which, as a result, enable simplified handling by the user.

The dishwasher has at least one washing basket. She can, like most of the

Is the case, in particular have several washing baskets, for example at least one

Lower basket and an upper basket above it.

According to the invention, a dishwashing rack, such as a lower rack, can assume two positions of use at the discretion of the user. So the dishwashing basket, which is shown below without

Restriction of generality is also referred to as the lower basket, user side by means of the rail device from its located in the washing area

Non-use position in a first moved out of the washroom

Use position are spent. If necessary, the washing basket, in particular

Lower basket from this first position of use by means of the seven-jointed

Linkage are raised and placed in a second position of use, preferably in which the washing basket, especially the lower basket, the height level of a

occupies the upper basket.

The advantage of the construction according to the invention consists, among other things, in the fact that the washing basket can be pulled out of the washing compartment as desired, like a conventional washing basket or lower basket, but at the same time there is the possibility of the

To be able to raise the washing basket or lower basket to the level of a washing basket arranged above it, in particular the upper basket. That both the possibility of one

Full extension and lifting is possible, has the advantage that the washing compartment floor provided by the washing compartment is accessible in a simplified manner, namely when the washing basket or lower basket is only in the extended but not in the raised position. Conventional four-bar linkage can not distinguish between these two positions of use, so that the

Rinse basket or lower basket according to the prior art either in his

Non-use position or is in its raised position of use. In both cases, however, the washroom floor is difficult or impossible to access.

The accessibility of the floor of the washing compartment for the user is particularly important in order to be able to reach the salt refill opening that is typically located here.

Furthermore, the distinction between lifting and pulling out is advantageous when a user wants to place more than just items to be washed in the dishwasher.

If, in accordance with the prior art, the washing rack or lower rack can only be swiveled upwards, it is necessary to move the swiveled up washing rack or

Pivot the lower basket back down before accessing the others

Rinse baskets is allowed. This is perceived as cumbersome by the user. One

The embodiment according to the invention provides a remedy here in the manner already described above, since it makes it possible to distinguish between two positions of use, namely the fully extended position on the one hand and the raised position on the other.

The configuration according to the invention also makes it possible in a simple manner

Locking of the lifting device when the washing rack or washing basket is not yet fully extended.

lower basket. This ensures that the washing rack or lower rack can only be moved into the raised, second position of use if the washing rack or lower rack has previously been fully extended and brought into the first position of use. This prevents an unwanted collision with an upper basket.

Furthermore, the configuration according to the invention provides the advantage of a

End position locking in the raised, i.e. second position of use of the

washing basket. An unintentional sagging of the washing basket is thereby avoided and it is ensured that the user must first unlock it before a

Pivoting back the washing basket can take place in the first position of use.

The construction according to the invention is also simple in construction and therefore robust, less susceptible to failure and durable.

Overall, the invention proposes a simple and cost-effective mechanism which, in particular, makes it possible to distinguish between two positions of use for simplified handling of a washing basket, namely a fully extended, first position of use and a highly pivoted, second position

position of use.

According to a further feature of the invention it is provided that the

Rail device has a top rail, a middle rail and a body rail, the top rail being slidably arranged on the middle rail and the middle rail 5 being slidably arranged on the body rail, the top rail being arranged on the washing basket and the coupling element being arranged on the body rail.

The rail device has three individual rails that are arranged telescopically, namely a top rail, a middle rail and a body rail.

The upper rail can be moved in relation to the middle rail and the middle rail in relation to the body rail, which means that the overall telescoping capability of the

Rail device results. This allows the rail device to transfer the washing basket from its non-use position, in which the washing basket is in the washing compartment, to its first position of use, in which the washing basket is out of the

flushing tank is moved out.

According to the invention, it is now provided that the top rail is arranged on the washing basket, with the coupling element of the seven-bar coupling mechanism according to the invention being located on the carcass rail. In the case of lifting, the washing basket is therefore raised

Interposition of the rail system takes place.

According to a further feature of the invention, it is provided that a washing basket

Hold-down rail is arranged, which cooperates with the locking handlebar. This

Hold-down rail causes the washing basket to be raised, ie transferred into the raised, second position of use, only if the washing basket is first moved completely out of the washing compartment. If the

The washing basket is only partially moved out of the washing tank

Interaction of hold-down rail and locking handlebar ensure that the

lifting device is blocked.

According to a further feature of the invention, the locking link has a bolt on the washing basket side that interacts with the hold-down rail. This bolt strikes against the hold-down rail if the washing basket has not yet been completely moved out of the washing compartment, but a user nevertheless does

Initiates the lifting movement of the washing basket. Since the bolt in this case to the

Hold-down rail strikes, the lifting device is locked, so that a transfer of the washing basket is prevented in the second position of use. Only when the washing basket is so far removed from the washing tank that the hold-down rail

Bolt releases the locking handlebar, is an intended use of the

Lifting equipment permitted.

According to a further feature of the invention it is provided that the coupling-side

Pivot of the locking handlebars in the direction of extraction of the washing basket from one of the

Dishwasher provided washing basket is arranged out in front of the pivot point of the first link on the coupling member side. This geometric arrangement ensures that in the event of a lifting movement, the bolt provided by the locking link performs an initial pivoting movement, which is almost in the vertical direction of the

Dishwasher, therefore almost perpendicular to the horizontal alignment of

Hold-down rail runs. Advantageously, this also means that when the washing rack, in particular the lower rack, is lifted, it first moves in the vertical direction before it moves in the direction opposite to the pull-out direction

Upper basket swings in.

According to a further feature of the invention it is provided that at the

Center rail arranged link guide is provided, which cooperates with the locking handlebar.

The interaction of the slotted guide and locking link has the advantage that there is forced guidance for the lifting movement of the washing basket. This ensures safe and guided movement of the washing basket. Here is the

Linked guide arranged on the middle rail, therefore moves together with the

Rail device when the washing basket is extended out of the washing container.

The distinction between the first and second position of use is therefore through the

Link guide not affected.

According to a further feature of the invention, it is provided that the locking link has a rotatably arranged roller which interacts with a link contour provided by the link guide. When it is lifted, this roller moves with little wear along the link contour provided by the link guide, which produces the forced guidance already described above. The connecting link contour is preferably concave in a section in the extension direction of the washing rack, in particular in an upper area of the link guide, which causes the washing rack, in particular the lower rack, to be moved in the direction of the upper rack at the last moment of the lifting movement. In its second position of use, the washing basket, in particular the lower basket, is therefore still in overlap with the one in its

washing room door in the open position. Liquids dripping from the washing basket can therefore be safely caught by the open washing compartment door.

According to a further feature of the invention, it is provided that the locking link has a stop which interacts with the coupling link. This stop comes to rest on the coupling link in the second position of use of the washing basket. In this position, the washing basket is in an over-dead position, so that unintentional swiveling back, ie lowering of the washing basket, is reliably prevented. It requires a return transfer of the rinsing basket in the first

Position of use rather an active unlocking of the rinsing basket by the user, which is achieved in that the user grasps the rinsing basket and moves it out of the dead center position until the rinsing basket reaches a position in which it can move downwards following the weight.

The invention also proposes a dishwasher with a washing compartment that provides a washing compartment and a washing basket that can be moved and accommodated in the washing compartment, with a lifting device of the type according to the invention being provided for the washing basket. A dishwasher equipped in this way provides the advantages already explained above.

Further features and advantages of the invention result from the following

Description based on the figures. show it

Fig. 1 in a schematic perspective view of a washing container with a than

Rinse basket trained lower basket in non-use position;

FIG. 2 shows a schematic perspective view of the lower basket according to FIG. 1 with a lifting device according to the invention arranged thereon;

FIG. 3 shows the lower basket according to FIG. 2 in a schematic side view; FIG.

4 shows a schematic perspective view of a washing compartment with a lower basket in the first position of use;

FIG. 5 shows a schematic perspective view of the lower basket according to FIG. 4 with a lifting device according to the invention arranged thereon;

FIG. 6 shows the lower basket according to FIG. 5 in a schematic side view; FIG.

7 shows a schematic perspective view of a washing compartment with a lower rack in the second position of use;

FIG. 8 shows a schematic perspective view of the lower basket according to FIG. 7 with a lifting device according to the invention arranged thereon;

FIG. 9 shows the lower basket according to FIG. 8 in a schematic side view; FIG.

10 shows a lower basket in a non-use position in a schematic perspective view;

FIG. 11 shows a detail according to FIG. 10 in a detailed view; FIG.

FIG. 12 shows the lower basket according to FIG. 10 in a schematic side view; FIG.

13 shows a schematic perspective view of a lower basket in a position partially moved out of a washing compartment;

FIG. 14 shows a detail according to FIG. 13 in a detailed view; FIG.

FIG. 15 shows the lower basket according to FIG. 13 in a schematic side view; FIG.

FIG. 16 shows the lower basket according to FIG. 15 in a schematic sectional view

cutting line A-A;

FIG. 17 shows the detail according to FIG. 13 in a schematic side view; FIG.

18 shows a lower basket moved out of a washing compartment in a schematic perspective view;

FIG. 19 shows a detail according to FIG. 18 in a detailed view; FIG.

FIG. 20 shows the lower basket according to FIG. 18 in a schematic side view;

FIG. 21 shows a detailed view of a detail according to FIG. 20;

22 shows a schematic perspective view of one that has been moved out of the washing container and is in the first position of use

lower basket;

FIG. 23 shows the lower basket according to FIG. 22 in a schematic side view;

24 shows a schematic perspective view of a lower basket partially pivoted upwards in the height direction;

FIG. 25 shows the lower basket according to FIG. 24 in a schematic side view;

26 shows a schematic perspective view of one pivoted further upwards

lower basket;

FIG. 27 shows a detail view of a detail according to FIG. 26;

28 shows a schematic side view of a lower basket pivoted further upwards in the height direction;

FIG. 29 shows the lower basket according to FIG. 28 in a schematic perspective view;

FIG. 30 shows a detail according to FIG. 29 in a detailed view; FIG.

31 shows a schematic perspective view of a lower basket in a completely raised, second position of use;

FIG. 32 shows a detailed view of a detail according to FIG. 31;

33 shows a partially pivoted back lower basket in a schematic side view;

FIG. 34 shows a detail according to FIG. 33 in a detailed view; FIG.

35 shows a lower basket located in the second position of use in a schematic side view;

FIG. 36 shows a detail according to FIG. 35 in a detailed view; FIG.

37 shows a lower basket located in the second position of use in a schematic perspective view;

FIG. 38 shows a detail according to FIG. 37 in a detailed view; FIG.

39 shows a lower basket pivoted back beyond the dead center in a schematic perspective view;

FIG. 40 shows a detail according to FIG. 39 in a detailed view; FIG.

41 in a schematic side view a lower basket located in the second position of use and

42 shows a schematic side view of a lower basket pivoted back beyond the dead center position.

1 shows, in a schematic perspective illustration, a washing container 1 of a dishwasher which is otherwise not shown in detail in the figures. The

Washing container 1 in turn provides a washing chamber 2 which, when used as intended, serves to accommodate items to be washed to be cleaned.

The rinsing chamber 2 is accessible to the user through a loading opening 4 . The loading opening 4 can be closed in a fluid-tight manner by means of a rinsing chamber door 3, wherein the rinsing chamber door 3 can be pivoted about a horizontal pivot axis and can be transferred from a closed position to the open position shown in FIG. 1 and vice versa by the user.

When used as intended, washware supports are used for receiving the washware, with a washing basket 5 in the exemplary embodiment shown as the washware support

Configuration of a lower basket is provided.

Fig. 1 shows the washing basket 5 in its non-use position, in which the

Rinsing basket 5 is completely moved into the washing compartment 2 against the pull-out direction 6, so that the washing compartment door 3 can move from its open position into its collision-free position

Closing position can be transferred.

Fig. 4 shows the washing basket in a first position of use, in which the

Rinse basket 5 is moved out of the wash cabinet 2 in the pull-out direction 6 .

In a schematic perspective view, FIG. 7 shows the washing basket 5 in a second

Recognize the position of use in which it is raised from the first position of use according to FIG. 4 in the vertical direction 31 upwards. In this second position of use, the dishwashing rack 5 serving as the lower rack is at the level of one in the

Figures not shown upper basket.

For transferring the washing basket 5 from the non-use position according to FIG. 1 to the first

Use position according to FIG. 4 is a rail device 9, as can be seen, for example, from the illustrations according to FIGS. 5 and 6 results.

Referring to the plane of the drawing, for example according to FIG. 5 , the washing rack 5 is equipped with a rail device 9 on the left and right-hand side, so two rail devices 9 are provided for each washing basket 5 . One has

Rail device 9 over a total of three rails that are telescopic to each other. There are specifically a top rail 27, a middle rail 28 and a

Body rail 29 is provided, the upper rail 27 being arranged on the middle rail 28 so that it can be moved in relation to the middle rail 28 and the middle rail 28 being arranged on the body rail 29 so that it can be moved in relation to the body rail 29 .

The lifting device 7 according to the invention serves to transfer the washing basket 5 from the first position of use according to FIG. 4 into the second position of use according to FIG. 2 and 3 results.

The lifting device 7 has two seven-bar linkage 18, with

Referring to the plane of the drawing, for example according to FIG.

The structure of a seven-bar linkage 18 results in particular from the

Representation according to Fig. 3.

A coupling mechanism 18 has a coupling element 10 arranged on a rail device 9 of the washing basket 5. A base element 10 fixed on the machine side is also provided. This is, for example, on the inside of the washing compartment 1 on the associated

Rinse cabinet wall arranged in a secure position.

Furthermore, two links 12 and 13 are provided, both links 12, 13 being pivotably arranged at one end on the base member 11 on the one hand and at the other end on the coupling member 10 on the other hand. The first link 12 form with the

Base member 11 and the coupling member 10, the pivot points 14 and 15 and the second link 13 with the base member 11 and the coupling member 10, the pivot points 16 and 17 from.

The coupling member 10, the base member 11, the first link 12 and the second link 13 together form a four-bar linkage 8 known from the prior art as a lifting device 7 per se.

The lifting device 7 according to the invention is characterized in that the four-bar coupling mechanism 8 is supplemented by a locking link 19 and a coupling link 20 to form a seven-bar coupling mechanism 18, with the locking link 19 being pivotable on the coupling link 10 at one end and pivoting on the other end

Coupling link 20 is arranged and wherein the coupling link 20 is arranged at one end pivotably on the first link 12 and at the other end pivotally on the locking link 19 . The locking link 19 is therefore arranged on the coupling member 10 such that it can pivot about the pivot point 23 , and the coupling link 20 is arranged on the first link 12 such that it can pivot about the pivot point 22 . The locking handlebar 19 and the

Coupling links 20 also form the common pivot point 21 . Overall, a seven-bar linkage 18 with the pivot points 14, 15, 16, 17, 21, 22 and 23 is provided.

The Figs. 2 and 3 allow the lifting device according to the invention 7 in

Recognize when the washing basket 5 is not in use. The Figs. 5 and 6 show the lifting device 7 according to the invention in the first position of use of the washing basket 5.

And the figs. Finally, FIGS. 8 and 9 show the lifting device 7 according to the invention in the second position of use of the washing basket 5.

The other Figs. 10 to 42 show the functioning of the lifting device 7 according to the invention in different views in detail.

As can be seen in particular from a synopsis of Figs. 10 to 17 results, the

Rinse basket 5 via a hold-down rail 30. This acts with one of the

Locking link 19 provided bolt 32 together. The bolt 32 comes in

Position of non-use and when the washing basket 5 is not fully extended in the vertical direction 31 below the hold-down rail 30 .

The hold-down rail 30 has a stop 33 at the front with respect to the pull-out direction 6, as can be seen in particular in FIG. The stop 33 rests against the bolt 32 when the washing basket 5 is in the non-use position.

For a transfer of the washing basket 5 from the first position of use according to FIG. 4 into the second position of use according to FIG

To pivot lifting device 7, as a result of which the respective bolts 32 of

Locking link 19 can be moved upwards in the height direction 31, as illustrated by the arrow in FIG. The bolts 32 are prevented from this upward movement by the respective hold-down rails 30 when the washing rack 5 is not completely transferred from the washing compartment 2 into the first position of use, and the hold-down rails 30 have therefore not yet released the associated bolts 32 . This position, which has not yet been released, results in particular from the representation according to FIG

Bolt 32 to move in height direction 31 upwards. The coupling gears 18 are therefore locked and a pivoting movement for lifting the washing basket 5 is not permitted. Only when the washing basket 5 has been moved out of the washing chamber 2 to such an extent that the first position of use shown in FIG

Synopsis of the Figs. 19 to 21 and 22 to 24, respectively.

As soon as the washing basket 5 is in its first position of use according to FIG. 4, the washing basket 5 can be moved upwards in the vertical direction 31 thanks to the lifting device 7 according to the invention, for which purpose the linkage 18 pivots, as can be seen from a synopsis of the further Figs. 24 to 42 yields, where also

Intermediate positions between the first use position and the second

Use position are shown.

As can be seen in particular from the illustration according to FIG. 27, a means of a

Attachment means 26 arranged on the center rail 28 link guide 25 is provided, which provides a link contour 35. This link contour 35 is concave with respect to the pull-out direction 6 (in the upper area of the link guide 25).

As soon as the linkage 18 is unlocked and to raise the washing basket 5 in

Pivoted upwards in the vertical direction 31 , a roller 34 , which is rotatably arranged on the locking link 19 , rests against the link contour 35 of the link guide 25 . There is such a guided movement given that a safe transfer of the washing basket 5 from the first

Position of use in the raised, second position of use ensures. This results due to the concave configuration of the 25 in the upper part of the link guide

Link contour 35 that at the end of a lifting movement of the washing basket 5, the washing basket 5 is guided in the direction of the washing compartment 1, ie counter to the pull-out direction 6, as indicated by the arrows in FIGS. 29 and 30 can be seen.

The rinsing basket 5 has reached its second position of use as soon as it thanks to

Link guide 25 has reached an over-dead position in which a stop 36 provided by the locking link 19 rests against the coupling link 20 . In this over-dead position, a stop element 24 arranged at the rear of the washing basket 5 on the washing basket 5 also comes to rest on the bolt 32 of the arresting link 19 .

The advantage of this over-dead position is that an unintentional lowering of the washing basket in the vertical direction 31 is reliably avoided. It must first be unlocked by the user by moving the washing basket 5 in accordance with the arrows according to FIGS. 37 to 40 is first brought out of its over-dead position on the user side 5 before gravity-induced sinking of the washing basket 5 in

Height direction 31 allows downwards in the first position of use.

As can be seen from the above description, the inventive

Construction of the lifting device 7 three functions: a) Locking of the lifting device 7 in the inserted and / or partially extended

Rinse basket position 5.

In this position, the bolt 32 of the locking link 19 is below the

Hold-down rail 30, so that actuation of the linkage 18 is prevented. The locking link 19 and the bolt 32 are arranged so that the bolt 32 at the beginning of a lifting movement is almost vertical

Movement relative to the washing basket 5 is carried out. However, the direction of movement of the bolt 32 is almost perpendicular to the pull-out direction, as can be seen in particular in FIG.

As can be seen in particular from Figs. 18 to 21 results, the linkage 18 is released as soon as the washing basket 5 is moved so far in the extension direction that the

Bolt 32 no longer from the associated hold-down rail 30 at a

Movement in the height direction 31 is prevented upwards. Since the seven-bar linkage 18 is a closed seven-bar chain, the entire mechanism of the washing basket 5 is in this position

Coupling gear 18 released and the washing basket 5 can therefore be raised.

Once the washing basket 5 is raised and the bolt 32 together with the

When the locking link 19 is moved up in the height direction 31, the washing basket can no longer be pushed back into the washing compartment 2, since the stop element 24 together with the bolt 32 forms a stop. The insertion path is now blocked, which prevents an unwanted collision with an upper basket, which is not shown in the figures.

b) retraction of the rail device 9 during a lifting movement

lever device 7.

The recovery function results in particular from a synopsis of the

Figs. 26 to 28. The connecting link guide 25 is connected to the middle rail 28 by means of a fastening means 26. If the washing basket 5 is pulled completely out of the washing compartment 2 by the user, the roller 34 of the locking link 19 rests against the link contour 35 provided by the link guide 25 . This forms a stop limiting the extension movement.

During a lifting movement, the roller 34 moves due to the

Circular path of the link contour 35 relative to the extension to the rear. As a result, the entire subassembly of the center rail 28 is drawn in to the rear, that is to say counter to the direction of extraction 6 . Since the middle rail 28 and the upper rail 27 have an end stop, the entire washing basket 5 is also drawn in. Due to the curved forward, that is, the concave contour of the link guide 25 is the

Infeed movement supported or reinforced.

The special feature of the configuration according to the invention is, among other things, that the link guide 25 is attached to the center rail 28, which can move relative to the body rail and that the locking link 19 with the roller 34 provided by it interacts with the link guide 25, with the locking link 19 is almost horizontal in its line of action at the beginning of a lifting movement.

C) Endlagenarretierung in the raised position of the washing basket 5, which is particularly evident from a synopsis of Figs. 29 to 36 results.

Together with the coupling link 20, the locking link 19 can be

Transfer over dead center position. This position of the links 19 and 20 can be achieved by simply raising the washing basket 5 upwards in the vertical direction 31 . In this

Position adjusts a locking of the rinsing basket 5, which is achieved in that the rinsing basket 5 by the user forward, that is against the

Extraction direction 6 is pressed. The stop element 24 on the washing basket 5 now comes into contact with the bolt 32 of the locking link 19. If the user pushes the washing basket 5 forward again, a force is thereby generated

Direction of action of the washing chamber on the locking link 19 built. As a result, the locking link 19 and the coupling link 20 are moved into an over-center position relative to one another, which over-center position is limited by an over-center stop 36 .

The over-center position is unlocked by the user by pulling on the washing basket 5, i.e. by moving the washing basket 5 in the pull-out direction 6.

First, the washing basket 5 with the upper rail 27 arranged thereon is pulled up to the end stop between the upper rail 27 and the middle rail 28 . Another pull on the washing basket 5 by the user pulls the link guide 25 connected to the center rail 28 forward via the stop between the rails. The link guide 25 has a at its upper end

Extension and thus presses the roller 34 of the locking link 19 in

Extension direction 6 to the front. Thus, by pulling on the washing basket 5, the

Mechanics of the linkage 18 back out of the over dead center position, so that the washing basket 5 can be lowered downwards in the vertical direction 31 .

The adapted link contour 35 of the link guide 25 makes it possible for the washing basket 5 not to fall down immediately after unlocking or even to be unlocked on one side. Due to the adjusted flatter link contour 35 of the link guide 25, the roller 34 is quasi braked and is not immediately free to move.

The risk of unwanted one-sided locking or unlocking is reduced in that the washing basket 5 has a relatively large distance of z.

B. must travel 50 mm before the handlebars by their own weight in the

fall over dead and vice versa.

As a result of the transfer to the over dead point, the lifting device 7 is also raised over the dead point. The two dead handlebars 19 and 20 act as one

Transmission gear, which supports the force when the load is heavily one-sided, in order to further raise the entire lifting mechanism.

Due to the necessary insertion movement for locking, the resulting

Force on the dead center gear for lifting even the more heavily loaded side and allows for a severely one-sided droop for a

locking.

The above-described solution advantageously makes it possible on the one hand to fully extend the washing basket 5 and on the other hand to lift it upwards in the vertical direction 31 . The washing basket 5 can be selected from a non-use position in a first

Position of use or a second position of use are transferred.

Reference numeral 1 washing container 33 stop 2 washing chamber 34 roller 3 washing chamber door 35 link contour 4 loading opening 36 stop 5 washing basket 6 extraction direction 7 lifting device 8 four-bar linkage 9 rail device 10 coupling link 11 base link 12 first link 13 second link 14 pivot point 15 pivot point 16 pivot point 17 pivot point 18 seven-bar linkage 19 Locking link 20 coupling link 21 fulcrum 22 fulcrum 23 fulcrum 24 stop element 25 link guide 26 fasteners 27 top rail 28 middle rail 29 body rail 30 hold-down rail 31 height direction 32 bolts

Claims (10)

patent claims 1. Lifting device for a washing basket of a dishwasher, with a four-bar coupling mechanism (8) which has a coupling element (10) on the washing basket side, a base element (11) fixed on the machine side and a first and a second link (12, 13), the two links (12, 13) are each arranged pivotably at one end on the base member (11) on the one hand and at the other end on the coupling member (10) on the other hand, characterized in that the coupling member (10) is arranged on a rail device (9) of the washing basket (5) and that the four-jointed coupling mechanism (8) is supplemented by a locking link (19) and a coupling link (20) to form a seven-jointed coupling mechanism (18), the locking link (19) being arranged on the coupling link (10) such that it can pivot at one end and on the coupling link (20) so that it can pivot at the other end and wherein the coupling link (20) is pivotable at one end on the first link (12) and pivotable at the other end on the locking link (19). is. 2. Lifting device according to Claim 1, characterized in that the rail device (9) has an upper rail (27), a middle rail (28) and a body rail (29), the upper rail (27) being displaceable on the middle rail (28) and the The middle rail (28) is displaceably arranged on the body rail (29), the upper rail (27) being arranged on the washing basket (5) and the coupling element (10) being arranged on the body rail (29). 3. Lifting device according to claim 1 or 2, characterized in that a hold-down rail (30) is arranged on the washing basket (5), which interacts with the locking link (19). 4. Lifting device according to claim 3, characterized in that the arresting link (19) has a bolt (32) cooperating with the hold-down rail (30) on the washing basket side. 5 Lifting device according to one of the preceding claims, characterized in that the coupling member-side pivot point (23) of the locking link (19) is arranged in the pull-out direction (6) of the washing basket (5) out of a washing container (1) provided by the dishwasher in front of the pivot point (15) of the first link (12) on the coupling member side. 6. Lifting device according to one of the preceding claims, characterized in that a link guide (25) arranged on the central rail (28) is provided, which interacts with the locking link (19). 7. Lifting device according to claim 6, characterized in that the locking link (19) has a rotatably arranged roller (34) which cooperates with a link contour (35) provided by the link guide (25). 8. Lifting device according to Claim 6, characterized in that the link contour (35) provided by the link guide (25) is concave in a section in the extension direction (6) of the washing basket (5). 9. Lifting device according to one of the preceding claims, characterized in that the locking link (19) has a stop (36) cooperating with the coupling link (20). 10. Dishwasher with a washing compartment (1) providing a washing compartment (2) and a washing basket (5) accommodated in a movable manner by the washing compartment (1), characterized by a lifting device (7) for the washing basket (5) according to one of the preceding claims.