EP3439528B1 - Sliding and lifting mechanism for a piece of furniture or domestic appliance, and piece of furniture or domestic appliance having such a sliding and lifting mechanism - Google Patents

Description

The invention relates to a sliding and lifting mechanism of a shelf of a piece of furniture or household appliance, comprising a pull-out guide with a carcass rail and a running rail that is movable relative to the carcass rail, and a lifting device that is arranged on the running rail and carries the tray, with a pivoted locking lever being provided is. The invention further relates to a piece of furniture or a household appliance with a shelf which is guided by such a sliding and lifting mechanism.

Such a sliding and lifting mechanism with a scissor mechanism as a lifting device is from the document JP 2006 204 591 A known. The sliding and lifting mechanism is used there to lift a crockery basket of a dishwasher. The basket is arranged on a scissor mechanism and can be pulled out from the body of the dishwasher together with this in a trough-like pull-out. When the tub-like pull-out is pulled out, the basket can be lifted using a handle, whereby the scissor mechanism extends. In the raised situation, the crockery basket can be loaded or unloaded in an upright position of the user which relieves the back muscles and the spine. Due to the trough-like pull-out, however, the crockery basket occupies the entire interior of the dishwasher, even when it is pushed in, and cannot be used together with a second crockery basket arranged above, as is the case with a majority of commercially available dishwashers.

From the publication DE 10 2012 107 993 A1 a sliding and swivel mechanism for a shelf of a piece of furniture or household appliance is known, in which the shelf, for example a crockery basket, is guided through pull-out guides. The pull-out guides are arranged on a swivel mechanism that allows the pull-out guides and the shelf to be swiveled upwards. In this case, a lock is provided which prevents a shelf that is not fully extended from being pivoted up, which could lead to a collision within the furniture or household appliance, for example with another dish rack arranged above.

In the sliding and lifting mechanism of the document JP 2006 204 591 A To save space, a pull-out with the help of laterally arranged guide rails can be used instead of the trough-like pull-out. In this case, the sliding and lifting mechanism can also be used if there are additional shelves or fixed shelves in the body of the furniture or household appliance Bottoms are arranged, which however prevent the pull-in guide from being pushed in when the lifting device is extended.

It is therefore an object of the present invention to provide a sliding and lifting mechanism of the type mentioned in the introduction, in which the pull-in guide is prevented from retracting when the lifting device is extended. It is a further object of the present invention to provide a piece of furniture or household appliance with such a sliding and lifting mechanism.

This object is achieved by a sliding and lifting mechanism or a piece of furniture or household appliance with the respective features of the independent claims. Advantageous refinements and developments can be found in the respective dependent claims.

In a sliding and lifting mechanism according to the invention of the type mentioned at the outset, the pivotably mounted locking lever blocks movement of the running rail with respect to the carcass rail when the shelf is raised in a locking position.

Via the pivotably mounted locking lever, the tray or the lifting device connected to the tray is coupled to the pull-out guide in such a way that the movement of the running rail relative to the carcass rail is blocked and the pull-out guide cannot be pushed in when the tray is raised.

Preferably, the running rail is blocked relative to the carcass rail directly on the carcass rail, as a result of which the insertion movement can be locked when the shelf is raised, without changes to the carcass of the furniture or the household appliance being necessary. Alternatively, it can be blocked against a fixed part of the body, preferably against a component of the body that does not have to be specially configured for this purpose and is already present as standard, for example a side wall of the body. in principle it is of course also possible to provide or mount a special element on the body, which is used to lock the movement of the running rail relative to the body rail via the locking lever.

In an advantageous embodiment of the sliding and lifting mechanism, the locking lever is pivotally mounted directly or indirectly on a rail of the pull-out guide that is movable relative to the cabinet rail. This also enables locking without any intervention in the body of the furniture or household appliance. The said movable rail of the pull-out guide can be the running rail of the pull-out guide or a middle rail which is arranged between the carcass rail and the running rail in the case of a so-called full extension.

In a further advantageous embodiment of the sliding and lifting mechanism, the locking lever has a stop surface on a lever arm, with which it is in engagement in the locked position with the body rail. The stop surface preferably points in the direction of the lever arm and, in the locking position, bears against an edge of the body rail pointing forward in the pull-out direction. By arranging the stop surface in the direction of the lever arm, the locking lever can be designed to save material and yet transmit large forces in the locking position. The use of a forward-facing edge of the body rail, against which the stop surface rests in the locking position, also allows the locking mechanism to be implemented without additional material expenditure. An existing front edge of the body rail can advantageously be used as a contact surface for the stop surface of the locking lever.

In a further advantageous embodiment of the sliding and lifting mechanism, which is suitable for a pull-out guide with a central rail, the locking lever is arranged on the central rail and is designed as a two-sided lever which, in the locking position, is in engagement with a further lever arm in engagement with the running rail of the pull-out guide. The further lever arm preferably has a further stop surface, which points in the direction of the further lever arm and, in the locking position, bears against an edge of the running rail pointing rearward in the pull-out direction. The previously described as advantageous contact of the locking lever against the edge of the body rail is analogously transferred to the contact of the locking lever on the running rail.

In a further advantageous embodiment of the sliding and lifting mechanism, the locking lever is mounted on the running rail and is designed as a one-sided lever. The locking lever can be mounted on the running rail, for example, via a locking rocker, the locking rocker being pivotably mounted to the running rail and the locking lever being pivoted to the locking rocker. In this embodiment, which can be used both in a pull-out guide with and in a pull-out guide without a central rail, the locking lever prevents movement of the running rail relative to the carcass rail independently of a central rail.

In a further advantageous embodiment of the sliding and lifting mechanism, the tray and / or the lifting device is in engagement with the locking lever, at least in the lowered position of the tray or the lifting device. This engagement constitutes a coupling between the storage or lifting device and the locking lever, so that the rails are locked when the storage or lifting device is raised. It can be provided, for example, that the locking lever automatically assumes the locking position by weight and / or spring force, at least when the pull-out guide is in an extended position, when the locking lever is not in engagement with the lifting device and / or the shelf. This can preferably be achieved by arranging an element on the shelf or the lifting device which acts on the lever arm at least in the extended position of the pull-out guide and moves it out of the locking position of the lifting device. The element can contact the locking lever directly or indirectly via, for example, the locking rocker, the movement of which is transmitted to the locking lever.

In a further advantageous embodiment of the sliding and lifting mechanism, the lifting device is at least one pair of scissors with scissor levers, preferably one pair of scissors each being arranged on two opposite sides of the tray.

In a further advantageous embodiment of the sliding and lifting mechanism, the lifting device is blocked in an at least partially retracted position of the pull-out guide. For this purpose, a locking hook is preferably arranged on the pull-out guide, which in the at least partially retracted position of the pull-out guide locks, for example overlaps, an element formed or arranged on the lifting device and / or the shelf against a lifting movement. The blocking prevents the Lifting device can be raised before the pull-out guide is fully extended. The locking hook can, for example, be arranged on a separate pawl which is pivoted depending on the pull-out position of the pull-out guide in order to release the storage area or the lifting device. Alternatively, the locking hook can also be arranged on the locking rocker.

A piece of furniture or household appliance according to the invention with a shelf has a previously described sliding and lifting mechanism for the shelf. The sliding and lifting mechanism can advantageously be used in a dishwasher as a household appliance, the rack being a crockery basket of the dishwasher.

Fig. 1

eine isometrische Gesamtansicht eines Geschirrspülers mit ei-ner Geschirrkorbeinheit mit Schiebe- und Hubmechanismus in einem ersten Ausführungsbeispiel;

Fig. 2a

eine isometrische Ansicht des Schiebe- und Hubmechanismus in eingefahrener Schiebestellung und abgesenkter Hubstellung des Drahtkorbs;

Fig. 2b

ein Ausschnitt aus Fig. 2a in einer Detailansicht;

Fig. 3

eine isometrische Ansicht eines Schiebe- und Hubmechanis-mus in ausgefahrener Schiebe- und ausgefahrener Hubstel-lung des Drahtkorbs;

Fig. 4a, b

eine Seiten- bzw. isometrische Detailansicht eines Teils des Schiebe- und Hubmechanismus in einer teileingefahrenen Schiebestellung des Drahtkorbs;

Fig. 5a, b

eine Seiten- bzw. isometrische Detailansicht eines Teils des Schiebe- und Hubmechanismus in einer Zwischenstellung;

Fig. 6a, b

eine Seiten- bzw. isometrische Detailansicht eines Teils des Schiebe- und Hubmechanismus bei leicht angehobenem Drahtkorb;

Fig. 7a-c

verschiedene Seiten- bzw. isometrische Detailansichten eines Teils des Schiebe- und Hubmechanismus bei weiter angeho-benem Drahtkorb;

Fig. 8a

eine isometrische Ansicht eines zweiten Ausführungsbeispiels eines Schiebe- und Hubmechanismus in ausgefahrener Schiebestellung und abgesenkter Hubstellung eines Draht-korbs;

Fig. 8b

eine Detailansicht aus Fig. 8a;

Fig. 9a

eine isometrische Ansicht des zweiten Ausführungsbeispiels des Schiebe- und Hubmechanismus bei leicht angehobenem Drahtkorb;

Fig. 9b

eine Detailansicht aus Fig. 9a;

Fig. 10a, b

eine Seiten- bzw. isometrische Detailansicht eines Teils des Schiebe- und Hubmechanismus des zweiten Ausführungsbei-spiels; und

Fig. 11a-c

verschiedene Seiten- bzw. isometrische Detailansichten eines Teils des Schiebe- und Hubmechanismus des zweiten Ausfüh-rungsbeispiels.

The invention is explained in more detail below on the basis of exemplary embodiments with the aid of figures. The figures show:

Fig. 1

an overall isometric view of a dishwasher with a dish rack unit with a sliding and lifting mechanism in a first embodiment;

Fig. 2a

an isometric view of the sliding and lifting mechanism in the retracted sliding position and the lowered lifting position of the wire basket;

Fig. 2b

a cut out Fig. 2a in a detailed view;

Fig. 3

an isometric view of a sliding and lifting mechanism in the extended sliding and extended lifting position of the wire basket;

4a, b

a side or isometric detailed view of a part of the sliding and lifting mechanism in a partially retracted sliding position of the wire basket;

5a, b

a side or isometric detailed view of a part of the sliding and lifting mechanism in an intermediate position;

6a, b

a side or isometric detailed view of a part of the sliding and lifting mechanism with the wire basket slightly raised;

7a-c

different side or isometric detailed views of a part of the sliding and lifting mechanism with the wire basket further raised;

Fig. 8a

an isometric view of a second embodiment of a sliding and lifting mechanism in the extended sliding position and lowered lifting position of a wire basket;

Fig. 8b

a detailed view Fig. 8a ;

Fig. 9a

an isometric view of the second embodiment of the sliding and lifting mechanism with the wire basket slightly raised;

Fig. 9b

a detailed view Fig. 9a ;

10a, b

a side or isometric detailed view of a part of the sliding and lifting mechanism of the second exemplary embodiment; and

Figures 11a-c

different side or isometric detailed views of a part of the sliding and lifting mechanism of the second exemplary embodiment.

In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc., unless otherwise stated, relate exclusively to the exemplary representation and position of the sliding and lifting mechanism or the storage selected in the respective figures.

In the Figures 1 to 7c is a first embodiment of a sliding and lifting mechanism with scissors mechanism shown in different working positions and different views. In all figures, the same reference numerals designate the same or equivalent elements.

A dishwasher 1 is shown as an example of a household appliance, in which the sliding and lifting mechanism is used for moving or lifting a crockery basket. It is noted that the sliding and lifting mechanism according to the application can also be found in other household appliances, e.g. Cooking appliances or refrigerators, or can also be used in furniture. In this sense, the crockery basket, which can be moved or lifted via the sliding and lifting mechanism, is also to be understood as an example of a shelf. Other examples of a shelf are food carriers, containers, wire baskets in furniture or drawers or other pull-outs that can be moved out of a carcass and raised.

Fig. 1 shows the dishwasher 1 in an isometric overall view with a body 2 and an open appliance door 3. The body 2 has side walls 21, on the inside of which rails for guiding two crockery basket units 4, 5 are arranged. The upper crockery basket unit 4 has a shelf in the form of a wire basket 41 as a crockery basket which, in a known manner, can be moved horizontally out of the interior of the body 2 in order to be able to put dishes in and out.

The lower crockery basket unit 5 is equipped with a sliding and lifting mechanism. It comprises a shelf in the form of a wire basket 51 as a crockery basket, which can also be moved horizontally and can be pulled out of the body 2. For this purpose, a pull-out guide 6 is arranged on each side of the crockery basket unit 5, which is mounted on the side walls 21, so that the wire basket 51 can be moved horizontally out of the body 2 when the appliance door 3 is open.

In addition to the possibility of moving the wire basket 51 horizontally out of the body 2, a lifting device is provided in order to be able to raise the wire basket 51 in the extended position and thus to be able to put dishes in and out more conveniently and in a way that is gentle on the back. In the illustrated embodiment, the lifting device is formed by a laterally arranged scissors mechanism, which has scissor levers 53, 54 on each side 52 of the wire basket 51.

For reasons of clarity, the Fig. 1 and also in the Fig. 2 and 3 only the scissors mechanism on one of the sides 52 of the wire basket 51 is shown by the lifting device. For static reasons, it makes sense to provide a synchronously moving scissor unit on each of the two sides 52.

In order to be able to lift the wire basket 51 upwards with as little effort as possible, the scissors mechanism is connected to a lever linkage which in the present case comprises a toggle lever 55 and a pivoting lever 56. At the end of the pivot lever 56, a bow handle 57 is attached with one of its two ends. The other, here in the free end of the bow handle 57 is coupled to a corresponding pivot lever on the other side of the wire basket 51, which, as mentioned, is not shown here.

When the bow handle 57 is pivoted, the pivot lever 56, which is rotatably mounted on the side 52, presses against the toggle lever 55 on one of the scissor levers, in this case on the first scissor lever 53, whereby the wire basket 51 is raised and the scissors mechanism is extended. In a fully extended position of the scissors mechanism, the toggle lever 55 and the pivoting lever 56 form a knee joint at their connection point, so that the wire basket 51 is securely locked in the upper position.

In the Fig. 2a and 3 the crockery basket unit 5 with the scissors unit and the pull-out guide 6 is each shown in an isometric view separately from the body 2 of the dishwasher 1. Fig. 2a shows the wire basket 51 in the lowered and retracted position while Fig. 3 reproduces the wire basket 51 in the extended and partially raised position. Fig. 2b shows a section of the Fig. 2a in a detailed view.

It can be seen in these figures that the pull-out guide 6 is a so-called full extension which comprises three rails which can move relative to one another, a carcase rail 61, a central rail 62 and a running rail 63. The carcase rail 61 is built into the dishwasher 2 in the carcase 2 of the dishwasher 1 mounted, for example screwed to the side wall 21.

The wire basket 51 is connected to the running rail 63 via the scissors unit. For this purpose, a pivot bearing 631 is arranged on a tab 635 at the rear end of the running rail 63, as seen in the pull-out direction, in which one end of the first scissor lever 53 is rotatably mounted. The opposite end of the first scissor lever 53 is slidably and rotatably mounted on the side 52 of the wire basket 51 in a linear guide 521. The other, second scissor lever 54 is reversely pivotable on the wire basket side in a rotary bearing 522 but is mounted in a fixed position relative to the wire basket 51. The opposite The lying end of the second scissor lever 54 has a roller 541 with which this end of the second scissor lever 54 can be moved on the upper side of the running rail 63. With wire basket 51 lowered ( Fig. 2a ) the roller 541 is essentially at the front end of the rail 63; when the wire basket 51 is raised, the roller 541 moves towards the rotary bearing 631.

A locking lever 7 is arranged on the central rail 62 so as to be pivotable about a horizontal axis in a pivot bearing 621. The locking lever 7 prevents the running rail 63 or the central rail 62 from being able to be moved relative to the carcass rail 61 when the wire basket 51 is raised.

Furthermore, a pawl 8 is arranged on the running rail 63, which prevents the wire basket 51 from being raised above the scissors mechanism when the pull-out guide 6 is not fully extended. The lock is in the detailed drawing of the Fig. 2b shown. The pawl 8 is C-shaped, with an upstanding leg forming a pawl 81. The pawl 8 is pivotally mounted on a side opposite the locking hook 81 and, in the pivoted position shown, engages over a bolt 512 which is arranged or formed on the wire basket 51. Raising of the latch 512 prevents the wire basket 51 from being raised.

The design and function of the locking lever 7 and the pawl 8 are described below in connection with the 4a to 7c explained in more detail.

In the Fig. 4a . 5a . 6a and 7a A section of the crockery basket unit 5 in the area of the locking lever 7 is shown in a side view in different positions of the wire basket 51. The Figures 4b . 5b . 6b and 7b each show a comparable section in the corresponding position of the wire basket 51 in an isometric oblique view. Fig. 7c additionally shows the position according to the 7a and 7b in an isometric oblique view with a view of the in the 7a and 7b Invisible side of the pull-out guide 6.

In the in the 4a and 4b shown partially extended position of the pull-out guide 6, a lifting of the wire basket 51 is initially prevented by the pawl 8, which engages with its locking hook 81 over the latch 512. The pawl 8 is C-shaped, the locking hook 81 forming one of the legs.

In the representation of the Figures 5a and 5b the pull-out guide 6 is then fully extended and the wire basket 51 is still (or again) in the lowered position.

In this exemplary embodiment, the locking lever 7 is a two-sided lever with a lever arm 71 which points in the direction of the body and a further lever arm 73 which points forwards in the pull-out direction. The lever arm 71 has an end section 72, on which a stop surface 721 is formed which extends essentially perpendicular to the longitudinal extension of the lever arm 71.

A run-on slope 722 is formed on the underside of the end section 72. When the pull-out guide 6 is retracted or partially retracted (cf. Fig. 2b ) the run-up slope 722 runs on a surface of the body rail 61, so that the lever arm 71 is slightly raised relative to a horizontal position and the further lever arm 73 is slightly lowered relative to the horizontal position. The end section 72 can have an inwardly projecting section in the lower region of the bevel 722 with which it engages under the central rail 62 (cf. also Fig. 4b ). This section forms the actual stop surface 721 of the lever arm 71 5a and 5b reproduced pull-out position, the chamfer 722 has left the support surface of the body rail 61, so that the end section 72 is no longer guided by the body rail 61.

A further end section 74 is formed on the opposite further lever arm 73, which provides a further stop surface 741 pointing forward in the pull-out direction. A further run-on slope 742 is formed on the top of the further end section 74.

In the pivot position of the locking lever 7 shown, the tab 635, which is arranged on the running rail 63 and carries the pivot bearing 631 for the scissor mechanism, can be behind the further run-on slope 742 up to the in the 5a and 5b shown position slide past, since the further bevel 742 only in the outer, the viewer in Fig. 5a facing region of the further end portion 74 is formed.

The further stop surface 741 ends below the tab 635 of the running rail 63 in such a way that the tab 635 is not completely in the position shown abuts the stop surface 741. Arranged in the area of the pivot bearing 621 of the locking lever 7 is a spring which is not visible in these figures and which exerts a counterclockwise torque on the locking lever 7. When the pull-out guide 6 is fully or partially retracted, the run-on slope 722 resting on the carcass rail 61 prevents the locking lever 7 from rotating from the unlocked position into a locking position. With the position of the pull-out guide 6 in the Figures 5a and 5b the run-on slope 722 and the body rail 61 are no longer in contact with one another. A rotation of the locking lever into the locked position does not take place, however, since a wire finger 511 is formed on the wire basket 51, which presses on the further bevel 742 from above. In the in Fig. 5a In the position shown, the tab 635 is already in engagement with the further stop surface 741, but the pull-out guide 6 is not yet locked. In this way it is achieved that, despite the fully extended pull-out guide 6, the locking lever 7 is still in the unlocked position, so that starting from the position of the 5a and 5b reinserting the pull-out guide 6 is possible.

The opposite leg of the locking hook 81 of the c-shaped pawl 8 forms an unlocking lever 82 with which the pawl 8 in the 5a and 5b shown position runs on a further lever arm 73 formed and protruding upward activator 75.

The geometry of the pawl 8 and the activator 75 are selected so that in the unlocked position of the locking lever 7, the pawl 8 is pivoted slightly counterclockwise, so that the in the 5a and 5b visible gap between the locking hook 81 and the latch 512 forms. This gap gives the wire basket 51 upward (initially small) freedom of movement. Thus in the position of 5a and 5b given the possibility of initially lifting the wire basket 51 at least slightly by moving the bow handle 57. The position of the 5a and 5b , hereinafter also referred to as the intermediate position, thus allows both the wire basket 51 to be reinserted and the wire basket 51 to be raised. The horizontal and vertical movements are thus unlocked.

In the 6a and 6b the sequence of movements is shown, which when lifting the bow handle 57 from the in the 5a and 5b shown position results. By lifting or pivoting the bow handle 57, the scissors mechanism is extended and the wire basket 51 is initially raised slightly. With the wire basket 51, the wire finger 511 also rises, which is in the intermediate position 5a and 5b has pressed on the further bevel 742 of the locking lever 7. When the wire finger 511 is raised, the locking lever 7 now pivots counterclockwise when subjected to spring force and correspondingly lowers with the end section 72. As a result of this lowering, the stop surface 721 now lies in front of the head end of the body rail 61, as a result of which the middle rail 62 is prevented from being pushed in relative to the body rail 61.

At the same time, the further lever arm 73 and with it the activator 75 are raised, as a result of which the pawl 8 pivots further counterclockwise and the pawl 81 completely releases the latch 512. A further lifting of the wire basket 51 is now possible, as is also shown in FIGS 7a-c is shown. When the further lever arm 73 is raised, the further stop surface 741 also rises to such an extent that the tab 635, on which the pivot bearing 631 is formed and which is arranged on the running rail 63, bears against this further stop surface 741 with a larger surface, whereby movement of the running rail 63 with respect to the central rail 62 is also blocked. A raised wire basket 51 can therefore no longer be moved into the body 2 of the dishwasher 1.

In the representation of the Fig. 7c it can be clearly seen that the pawl 8 is also fastened to the rotary bearing 631 in this exemplary embodiment. In this way, both the first scissor lever 53 and the pawl 8 are mounted on only one tab 635, which is mounted on the running rail 63. Furthermore, the representation of Fig. 7c It is easy to see that the additional run-on slope 742 is laterally offset from the tab 635 on the running rail 63, so that the tab 635 of the running rail 63 can pass laterally on the further run-on slope 742. In the exemplary embodiment shown, the latch 512 is a separate element which is mounted on the wire basket 51, for example is clipped on. Alternatively, it is conceivable to shape a wire element of the wire basket 51 so that it forms the latch 512.

After lowering the wire basket 51 into the intermediate position according to the 5a and 5b the pull-out guide 6 can then be retracted again. The locking lever 7 also acts as a sequence control for the order of retraction of the central or running rails 62, 63. The geometry of the locking lever 7 first releases the locking of the central rail 62 with respect to the carcass rail 61 when the wire basket 51 is lowered. Drives the Middle rail 62 then into the body rail 61, the locking lever 7 tilts slightly further clockwise due to the ramp 722, until the locking of the running rail 63 with respect to the central rail 62 is released by the lowering of the further lever arm 73 and the pull-out guide 6 is then the same Relative movements between body and middle rails 61, 62 or middle and top rails 62, 63 continue to move.

In the 8a to 11c a second embodiment of a crockery basket unit with a sliding and lifting mechanism 5 is shown. The arrangement shown can, for example, just like the crockery basket unit of the first exemplary embodiment, in a dishwasher 1, as shown in FIG Fig. 1 is reproduced, be installed. The same reference numerals in this exemplary embodiment designate the same or equivalent elements as in the first exemplary embodiment.

The crockery basket unit 5 comprises a pull-out guide 6, which in turn is designed as a full pull-out with carcase rail 61, central rail 62 and running rail 63. The corresponding rails are arranged on both sides of a wire basket 51 which is in turn coupled to the respective running rail 63 via a scissor mechanism as a lifting mechanism.

Fig. 8a shows the pull-out guide 6 in a fully extended position and the scissors mechanism in a fully lowered position. Fig. 8b outputs a section Fig. 8a in a detailed drawing again. In Fig. 9a is different from Fig. 8a the wire basket 51 is slightly raised when the pull-out guide 6 is also fully extended. Fig. 9b again shows a section Fig. 9a in detail.

In the first embodiment of the Fig. 1-7c the individual rails 61-63 of the pull-out guide 6 are arranged essentially one above the other and the scissors-type mechanism is located in the same vertical plane as the respective pull-out guide 6 Figures 8a-11c the individual rails 61-63 of the pull-out guide 6 are each arranged side by side. The scissor unit is located in a vertical plane which is arranged between the pull-out guide 6 and the side 52 of the wire basket 51.

Due to this fact, the fastening of the scissors mechanism, which in turn comprises crossed scissor levers 53 and 54 on each side of the wire basket 51, differs on the respective running rail 63 Fig. 8a and 9a It can be seen that, for example, the front end of the second scissor lever 54 in the pull-out direction is guided with a bolt 542 in a guide slot 632 which is formed in the running rail 63. The opposite end of the second scissor lever 54 is mounted, as in the first embodiment, in a rotary bearing 522 which is mounted on the side 52 of the wire basket 51. The first scissor lever 53 is correspondingly displaceably and rotatably mounted in a linear guide 521 at its front end as seen in the pull-out direction on the wire basket 51, whereas the rear end in the pull-out direction is rotatably mounted on the running rail 63 in a rotary guide that is not visible here.

To lift the wire basket 51, a bow handle 57 is again provided, which is connected on both sides to the respective end of a pivot lever 56. In the present exemplary embodiment, the pivot lever 56 is pivotally mounted on the pivot bearing 522 of the second scissor lever 54. The pivot lever 56 is coupled to the first scissor lever 53 via a driver lever 58. This driver lever 58 performs a function comparable to that of the toggle lever 55 in the first exemplary embodiment. When the pivoting lever 56 is pivoted, the wire basket 51 is raised and the driver lever 58 is moved over an upper dead center, so that the wire basket 51 is locked in an upper position.

As in the first embodiment of the Fig. 1-7c a locking lever 7 is also provided in this embodiment, which blocks the pull-out guide 6 in the extended position when the wire basket 51 is raised when the pull-out guide 6 is pulled out. In this exemplary embodiment, the locking lever 7 is a one-sided lever which is mounted on a locking rocker 9 in a pivot bearing 92 about a horizontal axis perpendicular to the direction of extension (cf. 8b, 8b ).

In the 10a and 10b details from the area of the locking rocker 9 are shown. The Fig. 10a shows a side view of part of the pull-out guide 6 with the articulated first scissor lever 53 and the locking rocker 9 in a side view with a view of the inside of the pull-out guide 6. Fig. 10b shows a comparable section in an isometric oblique view.

The locking rocker 9 is in turn mounted in a pivot bearing 633 so as to be pivotable about a horizontal axis, the pivot bearing 633 being mounted on a bracket 634 which is fastened to the running rail 63, in the present case in the region of the pivot bearing 631 for the first scissor lever 53. The tab 634 is guided vertically upward, so that the pivot bearing 633 of the locking rocker 9 is positioned above the rails 61-63. The tab 634 is also arranged so that it does not hinder movement of the rails 61-63 relative to one another. A locking hook 91 is arranged on the top of the locking rocker 9. The locking rocker 9 and the locking hook 91 cooperate with a bolt 523 which is fixed to the wire basket 51, in the illustrated embodiment on a plate-shaped element which also carries the pivot bearing 522 of the second scissor lever 54.

As in the 8a and 8b can be seen, the bolt 523 is positioned when the wire basket 51 is lowered in the mouth-shaped opening of the locking hook 91 and presses on the top of the locking rocker 9, which is thus brought into a substantially horizontal position. The pivoting range of the locking lever 7 relative to the locking rocker 9 is structurally adjusted so that the locking lever 7 is also substantially horizontally aligned in a horizontal orientation of the locking rocker 9. The stop surface 721 of the locking lever 7 is raised to such an extent that the rails 62, 63 can be retracted in this position without the stop surface 721 hitting an edge of the body rail 61.

If the wire basket 51 is raised in the extended position of the pull-out guide 6, the locking rocker 9 tilts due to its weight distribution and / or due to an optional torsion spring, which can be arranged in the region of the pivot bearing 631, into the in the 9a and 9b and also that 10a and 10b shown position, in which its rear end is seen in the pull-out direction. In this pivoting position of the locking rocker 9, the locking lever 7 lies with its free end on the top of the middle rail 62 and thus in front of the front edge of the body rail 61. In this locking position, the locking lever 7 blocks the insertion of the running rail 63 relative to the body rail 61. The pivoting range the locking rocker 9, which is necessary to release the bolt 523 from the mouth-shaped opening of the locking hook 91, is greater than the pivoting angle that the locking lever 7 can make until it rests on the top of the central rail 62. For this reason, the pivot bearing 92 is provided between the locking rocker 9 and the locking lever 7.

If the wire basket 51 is lowered again, it slides past the locking hook 91 and presses the locking rocker 9 again into the horizontal, into the 8a and 8b shown position. With the locking rocker 9, the locking lever 7 also pivots into the horizontal position and removes the blockage between the running rail 63 and the body rail 61. Correspondingly, the wire basket 51 can be retracted in the lowered position.

In the Figures 11a-11c the area of the locking rocker 9 is shown in at least partially retracted pull-out guide 6 in various detailed representations. Fig. 11a shows a side view, a detail of this side view in Fig. 11b is shown enlarged. Fig. 11c finally shows an oblique isometric view.

When the pull-out guide is retracted, the horizontally oriented locking rocker 9 slides with its underside over the upper longitudinal edge of the carcase rail 61. The pivot bearing 633 is positioned such that pivoting out of the horizontal alignment of the locking rocker 9 is blocked by the carcase rail 61 when the pull-out guide 6 is retracted. The bolt 523 on the wire basket 51 is thus caught in the mouth of the locking hook 91; a movement of the bolt 523 and thus of the wire basket 51 is not possible.

Fig. 11b shows the area of the pivot bearing 92 for the locking lever 7 in detail. The locking lever 7 is mounted in a recess of the locking rocker 9, through which the pivoting range of the locking lever 7 relative to the locking rocker 9 is determined. As in the 8a and 8b it can be seen, with the wire basket 51 lowered and the corresponding alignment of the locking rocker 9, it must be ensured that the locking lever 7 is pivoted up so far that the stop surface 721 is no longer in contact with the body rail 61. In principle, this can be achieved by a correspondingly designed lower edge of the recess in the locking rocker 9. In the illustrated embodiment (cf. Fig. 11b ) an adjusting screw 76 in the form of a threaded pin is arranged in the locking lever 7, with which the orientation of the locking lever 7 can be adjusted when the wire basket 51 is lowered.

reference numeral

1

dishwasher

2

corpus

21

Side wall

3

door

4

Rack unit

41

wire basket

5

Dish rack unit with sliding and lifting mechanism

51

wire basket

511

wire finger

512

bars

52

page

521

linear guide

522

Pivot bearing (for the second scissor lever 54)

523

bolt

53

first scissor lever

54

second scissor lever

541

caster

542

bolt

55

toggle

56

pivoting lever

57

bow handle

58

Transmission lever

6

pull-out guide

61

cabinet member

62

middle rail

621

Swivel bearing (for locking lever 7)

63

runner

631

Pivot bearing (for the first scissor lever 53)

632

guide slot

633

pivot bearing

634

flap

635

flap

7

locking lever

71

lever arm

72

end

721

stop surface

722

starting slope

73

another lever arm

74

further end section

741

further stop surface

742

further bevels

75

activator

76

adjustment

8th

pawl

81

ratchet

82

release lever

9

locking rocker

91

ratchet

92

Swivel bearing (for locking lever 7)

Claims (17)

1. Sliding and lifting mechanism of a rack of a piece of furniture or household appliance, comprising a pull-out guide (6) having a body rail (61) and a running rail (63) movable relative to the body rail (61), and a lifting device which is arranged on the running rail (63) and carries the rack, wherein a pivotably mounted locking lever (7) is present, characterized in that the pivotably mounted locking lever (7) blocks a movement of the running rail (63) with respect to the body rail (61) in a locking position when the rack is raised.
2. Sliding and lifting mechanism according to claim 1, in which the locking lever (7) is pivotably mounted on a rail of the pull-out guide (6) which is movable relative to the body rail (61).
3. Sliding and lifting mechanism according to claim 2, in which the locking lever (7) has a stop surface (721) on a lever arm (71), with which it engages with the body rail (61) in the locking position.
4. Sliding and lifting mechanism according to claim 3, in which the stop surface (721) faces in the direction of the lever arm (71) and in the locking position rests against an edge of the body rail (61) facing forwards in the pull-out direction.
5. Sliding and lifting mechanism according to one of claims 2 to 4, in which the pull-out guide (6) has a center rail (62) arranged between the body rail (61) and the runner rail (63), wherein the locking lever (7) is pivotably mounted on the center rail (62).
6. Sliding and lifting mechanism according to claims 3 and 5, in which the locking lever (7) is a two-sided lever which in the locking position is in engagement with a further lever arm (73) with the running rail (63).
7. Sliding and lifting mechanism according to claim 6, in which the further lever arm (73) has a further stop surface (741) which faces in the direction of the further lever arm (73) and, in the locking position, rests against an edge of the running rail (63) facing rearwardly in the pull-out direction.
8. Sliding and lifting mechanism according to one of claims 2 to 4, in which the locking lever (7) is mounted on the running rail (63).
9. Sliding and lifting mechanism according to claim 8, in which the locking lever (7) is a one-sided lever which is mounted on the running rail (63) via a locking rocker (9), wherein the locking rocker (9) is pivotably mounted relative to the running rail (63) and the locking lever (7) is pivotably mounted relative to the locking rocker (9).
10. Sliding and lifting mechanism according to one of claims 1 to 9, in which, at least in the lowered position of the rack, the lifting device and/or the rack is in engagement with the locking lever (7).
11. Sliding and lifting mechanism according to claim 10, in which the locking lever (7) automatically assumes the locking position by weight force and/or spring force at least in an extended position of the pull-out guide (6) when the locking lever (7) is not in engagement with the lifting device and/or the rack.
12. Sliding and lifting mechanism according to one of claims 1 to 11, in which an element is arranged on the rack or on the lifting device, which element acts on the locking lever (7) at least in the extended position of the pull-out guide (6) and moves said lever out of the locking position.
13. Sliding and lifting mechanism according to one of claims 1 to 12, in which the lifting device is blocked in an at least partially retracted position of the pull-out guide (6).
14. Sliding and lifting mechanism according to claim 13, in which a locking hook (81, 91) is arranged on the pull-out guide (6), which, in the at least partially retracted position of the pull-out guide, locks an element, which is formed or arranged on the lifting device and/or the rack, for a lifting movement.
15. Sliding and lifting mechanism according to one of claims 1 to 14, in which the lifting device is at least one scissor mechanism with scissor levers (53, 54).
16. Piece of furniture or household appliance having a rack and a sliding and lifting mechanism in accordance with one of claims 1 to 15.
17. Household appliance according to claim 16, wherein the household appliance is a dishwasher (1) with a dish basket (5) as a rack.

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