CN107205547B

CN107205547B - Sliding and lifting mechanism for furniture or household appliance rack, furniture and household appliance

Info

Publication number: CN107205547B
Application number: CN201680009760.6A
Authority: CN
Inventors: D·雷哈格; B·贝克斯特莫勒
Original assignee: Paul Hettich GmbH and Co KG
Current assignee: Paul Hettich GmbH and Co KG
Priority date: 2015-02-20
Filing date: 2016-02-19
Publication date: 2020-06-26
Anticipated expiration: 2036-02-19
Also published as: KR20170118109A; WO2016131952A1; EP3258826A1; CN107205547A; EP3258826B1; DE102015102500A1

Abstract

The invention relates to a sliding and lifting mechanism for a shelf (5) of a piece of furniture or household equipment (1), having a scissor-type mechanism (53-55) for pulling the shelf (5) out of the body (2) of the piece of furniture or household equipment (1) and for lifting the shelf (5), characterized in that the sliding and lifting mechanism has a toggle joint (59), which toggle joint (59) is coupled to the scissor-type (53-55) mechanism and locks the shelf (5) in a lifted position. The invention also relates to a piece of furniture or a household appliance (1) having a sliding and lifting mechanism of this type.

Description

Sliding and lifting mechanism for furniture or household appliance rack, furniture and household appliance

Technical Field

The invention relates to a sliding and lifting mechanism for a shelf of furniture or household appliances, having a scissor mechanism for pulling the shelf out of the body of the furniture or household appliance and for raising the shelf. The invention also relates to a piece of furniture or a household appliance having such a sliding and lifting mechanism.

Background

Such a sliding and lifting mechanism with a scissor mechanism is known from document JP 2006204591 a. Sliding and lifting mechanisms are used in dishwashers to raise cutlery baskets. The basket is arranged on the scissor mechanism and can be pulled out of the main body of the dishwasher together with the scissor mechanism in a slot-type pull-out device. When the slot-type pull-out device is pulled out, the basket can be raised at the handle, whereby the scissors mechanism is extended. In the upper position, the basket can be fixed by means of connecting means (e.g. pins) extending transversely in the upper region of the extension slot. In this position, the loading or unloading of the cutlery basket can take place in the upright position of the user, thus relieving the back muscles and the spine.

Depending on the loading state of the cutlery basket, it may be difficult for the user to lift the cutlery basket at the handle. Furthermore, the groove-type pull-out device mentioned is necessary for locking the cutlery basket in the upper position. Such a pull-out device with a high side wall for locking is not available for free-standing cutlery baskets which are guided, for example, over an open door of a dishwasher.

It is therefore an object of the present invention to provide a sliding and lifting mechanism of the type mentioned at the outset which makes it possible to easily raise and lock a shelf in an upper position with an advantageously simple structure. In particular, the shelf can also be locked in the upper position if no pull-out means with high side walls for locking are provided.

Disclosure of Invention

This object is achieved by a sliding and lifting mechanism or a piece of furniture or a household appliance having such a sliding and lifting mechanism having the features of the independent claims. Advantageous embodiments and improvements are indicated in the dependent claims.

The sliding and lifting mechanism according to the invention of the type mentioned at the outset is characterized in that it has an elbow joint which is coupled to the scissor mechanism and locks the shelf in the raised position. The toggle joint enables to lock the shelf itself in the upper position in an overextended (latched) position with a simple mechanical structure, without the need to provide side walls or similar tall elements on which the shelf can be fixed in the upper position.

In an advantageous embodiment of the sliding and lifting mechanism, the toggle joint is formed by a pivot lever and an elbow lever, wherein the pivot lever is rotatably connected to the shelf in a pivotable manner by the user, and the elbow lever is coupled to the scissors mechanism. Thus, the scissors mechanism can be pulled apart via pivoting of the pivot lever and the shelf can be raised. By a suitable length ratio of the lever side of the pivot lever, a force transmission can be produced, which simplifies the raising of the shelf.

In another advantageous embodiment of the sliding and lifting mechanism, the scissor mechanism is formed by at least two crossed scissor levers which are rotatably connected to each other and which are each connected at one end to the shelf such that they are rotatable or rotatable and displaceable. In this case, the elbow lever is preferably linked to one of the plurality of scissors levers to act on the scissors mechanism.

In a further advantageous embodiment of the sliding and lifting mechanism, the scissor lever has at least one roller on each of its free ends. The roller is used for the sliding movement of the sliding and lifting mechanism. By arranging the rollers on the scissors lever, the sliding movement and the lifting movement can be realized in a combined manner using few structural elements.

In a further advantageous embodiment of the sliding and lifting mechanism, the energy store is coupled to a scissor mechanism. The energy store is preferably a compression spring which is connected to the at least one scissors lever. For example, a compression spring may be attached between two scissor levers. It is also possible to connect the compression spring on only one side to one of the plurality of scissors levers and on its other side to the elbow lever or pivot lever.

In particular, during the initial phase of lifting, the energy store assists in the actuation of the scissors mechanism. The energy storage can advantageously be designed such that the most uniform possible force demand result is produced during the raising of the shelf. If the energy reservoir is connected to the toggle lever or pivot lever, the energy reservoir may additionally advantageously hold the over-extended toggle joint in the raised position of the shelf, thereby reducing the risk of accidental disengagement from the lock.

In a further advantageous embodiment of the sliding and lifting mechanism, a scissor mechanism with a toggle joint is arranged on each of two opposite sides of the shelf. Each toggle joint preferably has a pivot lever, wherein the free ends of the pivot levers, which are pivotable by the user, are connected to each other by a common arcuate handle. In this way, the shelf is uniformly assisted and raised on both sides. The arcuate handle allows for comfortable operation and ensures synchronous movement of the two scissors mechanisms.

The furniture or the household appliance according to the invention has a body and a shelf with a sliding and lifting mechanism, wherein the shelf can be pulled out and lifted from the furniture body via the sliding and lifting mechanism. The furniture or household appliance is characterized by the sliding and lifting mechanism described above. The sliding and lifting mechanism can produce the advantages proposed.

In an advantageous embodiment of the domestic appliance, it has an appliance door which provides at least one, preferably two, slideways for the rollers of the sliding and lifting mechanism. The stop for the sliding and lifting mechanism is preferably formed on the equipment door at the end of the at least one slide. The sliding and lifting mechanism is particularly preferably engaged in the stop in an at least partially raised state, so that it is rotatably connected to the stop. Safe operation of the sliding and lifting mechanism is provided by the stops. The engagement securing the slide and lift mechanism to the stop prevents the roller from moving out of the ramp during actuation of the lift mechanism. The engagement can be embodied, for example, in the form of a projecting pin arranged on a scissors lever of a scissors mechanism of the sliding and lifting mechanism, which projecting pin engages in a curved guide curve formed in the stop.

The sliding and lifting mechanism can be used particularly advantageously in dishwashers as domestic appliances, wherein the rack is a cutlery basket of the dishwasher. The lower cutlery basket of the dishwasher is particularly preferably equipped with a sliding and lifting mechanism.

Drawings

The invention will be explained in more detail below on the basis of exemplary embodiments with the aid of the drawings. In the drawings:

FIG. 1 a; showing a side view of a dishwasher with an opening device flap and a push-in cutlery basket;

FIG. 1b shows the dishwasher of FIG. 1a with a pulled-out lower cutlery basket, which is equipped with a sliding and lifting mechanism;

FIG. 1c shows the dishwasher of FIG. 1a with a pulled out and raised lower cutlery basket;

FIG. 2a shows an isometric view of the lower cutlery basket of the dishwasher shown in FIG. 1 in a pulled out and lowered position;

FIG. 2b shows a detail view of FIG. 2 a;

fig. 3a, 3b show views of the cutlery basket in a partially raised position compared to fig. 2a and 2b, respectively;

FIGS. 4a, 4b show views of the cutlery basket in the fully raised position compared to FIGS. 2a and 2b, respectively;

FIG. 5a shows a side view of the cutlery basket of FIG. 2a in a lowered position; and

fig. 5b shows a detail view of fig. 5 a.

Detailed Description

In the following description of the drawings, terms such as up, down, left, right, front, rear, etc. relate only to exemplary illustrations and positions of the sliding and lifting mechanisms or shelves selected in the respective drawings. The terms mentioned should not be understood as limiting. These references may vary due to different operating positions and/or mirror-symmetrical designs of the sliding and lifting mechanisms shown.

Exemplary embodiments of a slide and lift mechanism with a scissors mechanism are shown in the figures in various operating positions and in various views. Throughout the drawings, the same reference numerals indicate the same or identically functioning elements.

The dishwasher 1 is shown as an example of a domestic appliance, in which a sliding and lifting mechanism is used to move or lift a cutlery basket. It should be noted that the sliding and lifting mechanism according to the present application can also be used for other household appliances, such as cooking devices, or also for pieces of furniture. In this sense, cutlery baskets which can be moved or raised by means of a sliding and lifting mechanism are also understood as examples of racks. Other examples of shelves are food racks or drawers or other pull-out devices that can be moved and raised from the main body.

Fig. 1a shows a dishwasher 1 with a main body 2 and an opening device door 3 in a side view. Only one side wall 21 of the body 2 is visible in this view. Two extendable cutlery baskets 4 and 5 are pushed into the main body 2 of the dishwasher 1 and the upper one of them is movable in a known manner in the horizontal direction in order to place or remove dishes.

The lower cutlery basket 5 is equipped with a sliding and lifting mechanism according to the present application. The lower cutlery basket 5 is also horizontally movable and can be pulled out from the main body 2. For this purpose, a slide (not visible in this illustration) is formed in the appliance door 3. Further, a stopper 31 having a stopper surface 32 is formed in a front area (as shown on the left side in fig. 1 a), and the stopper 31 protrudes upward when the apparatus door 3 is opened. Typically, two parallel ramps are formed, wherein preferably a stop 31 is arranged on each ramp. Alternatively, such a stop 31 may be provided on only one of the two slides.

Fig. 1b shows the dishwasher 1 with the pulled-out lower cutlery basket 5 in a side view in the same way as fig. 1 a. Fig. 1c shows the dishwasher 1 with the lower cutlery basket 5 pulled out and raised.

The lower dish basket 5 includes a wire basket 51 in which dishes to be washed can be sorted. The side panels 52 are mounted laterally on the wire basket 51. The side panels 52 may be plastic elements, for example connected to the wire basket 51 by a threaded or snap connection. Only one side panel 52 is visible in the illustration of fig. 1 b. Side panels formed as mirror images of the visible side panels 52 are provided on opposite sides of the wire basket 51.

Two crossed

scissor levers

53, 54 are arranged in the lower region of the side panel 52. At the intersection of the two

scissor levers

53, 54, the two

scissor levers

53, 54 are rotatably connected to each other via a pivot joint 55, forming a scissor mechanism. The scissors lever 54 is rotatably mounted on the side panel 52 with a rotation point 54', whereas, conversely, the scissors lever 53 is fixed such that it is rotatable and horizontally displaceable on the side panel 52. For this purpose, sliding guides 521 are formed on the side panels 52, as can be seen in fig. 1 c. A bearing plate, on which the scissors lever 53 is rotatably mounted with a rotation point 53', is movably guided in this sliding guide 521.

Two rollers 56 are arranged on each free lever arm of the scissors levers 53, 54. The outer one of the rollers 56 is rotatably arranged substantially at the end of the scissor levers 53, 54. When the wire basket 51 is raised, these outer rollers 56 also rest against the appliance door 3. The inner one of the rollers 56 carries the load only in the lowered state of the cutlery basket 5. However, in this state they minimize the lever force acting on the scissors mechanism.

In the fully extended state of the cutlery basket 5 shown in fig. 1b, the cutlery basket 5 is pressed against the stop 31 in the pull-out direction by the front section of the scissors lever 53. For example, it may be provided that the axle pin on which the front roller 56 is mounted is pressed against the groove-shaped contact surface 32 of the stopper 31. In the event of an unfavorable load distribution in cutlery basket 51, for example, the groove-shaped stop surface 32 prevents the free end of the scissors lever 53 from also being lifted during the lifting process described below. Furthermore, an attachment for fixing the free end of the scissors lever 53 is provided on the side of the sliding and lifting mechanism, which is not visible in fig. 1a-1c, which attachment will be explained in more detail in connection with fig. 2-5.

After the cutlery basket 5 is pulled out using the sliding and lifting mechanism, the cutlery basket 5 can be raised by pivoting the pivot lever 57, as shown in fig. 1 c. The pivot lever 57 is rotatably connected to the side panel 52 at a rotation point 57'. A longer free lever arm operated by the user and a shorter lever arm rotatably connected at its end to the elbow lever 58 are formed on the pivot lever 57. Rotation occurs at the toggle joint 59. The other end of the toggle lever 58 is in turn rotatably connected to the scissor lever 54.

The scissors mechanism formed by the scissors levers 53, 54 is pressed apart by the pivoting movement of the pivot lever 57, and the side plate 52 is thus raised together with the wire basket 51. The fully raised position is shown in fig. 1c, in which the wire basket 51 is preferably located at the same height as the upper cutlery basket 4. In the fully raised position, the pivot lever 57 is pivoted back far enough in the direction of the main body 2 of the dishwasher 1 that the pivot lever 57 is out of the way during loading or unloading of the wire basket 51.

It can also be inferred from fig. 1c that the toggle joint 59 formed by the shorter lever arm of the pivot lever 57 and the toggle lever 58 assumes an overextended position, wherein the toggle joint is secured in the illustrated position by a stop. Thus, the wire basket 51 remains in the upper position shown. After the pivot lever 57 has been pivoted forward, the toggle joint 59 is first moved back above the dead point and the wire basket 51 is lowered again by further pivoting of the pivot lever 57.

Stops that hold the toggle joint 59 in the overextended position shown may be disposed on various elements of the toggle joint 59. For example, a stop may be formed near the toggle joint 59 at the corresponding end of the pivot lever 57 or the toggle lever 58. Additionally or alternatively, it is also conceivable to provide a stop on the side panel 2, on which the pivot lever 57 stops.

The ratio of the lengths of the actuating lever arm of pivot lever 57 and the lever arm connected to elbow lever 58 and the linkage point of elbow lever 58 on scissor lever 54 create a force transmission that facilitates the raising of wire basket 51.

Furthermore, an energy store 60, which is arranged between the scissors lever 53 and the elbow lever 58 and is designed, for example, as a compression spring, is visible in fig. 1 c. The energy store 60 holds the toggle lever 58 in the position shown, in which, on the one hand, the toggle joint 59 is overextended. On the other hand, the energy storage 60 facilitates the actuation of the lifting mechanism, in particular during the initial phase of lifting. In the already partially raised state, the pivot lever 57 and the lever of the toggle lever 58 are more advantageous than for the raised cutlery basket 51. Within this range, the assistance provided by the energy storage 60 is reduced. The lever ratio of the lifting mechanism and the energy store 60 can advantageously be designed such that the most uniform possible force requirement during lifting of the wire basket 51 exists over the entire pivoting range of the pivot lever 57.

In each of fig. 2a, 3a and 4a, an isometric view of a cutlery basket 5 with a sliding and lifting mechanism is shown. For ease of understanding, the device door 3 is not shown completely, but only partially in the region of the front roller 56.

Fig. 2a shows the wire basket 51 in a lowered state and fig. 3a shows the wire basket in a partially raised state; and in fig. 4a is shown a fully raised condition with the wire basket 51 in the upper position and with the toggle joint 59 locked (over-extended).

As is also clear in particular from fig. 2a, 3a and 4a, a scissors mechanism, which is formed essentially in a mirror image with a toggle joint 59 and a pivot lever 57, is arranged on each side of the wire basket 51. In this case, the two pivot levers 57 are connected at their free ends to each other by means of transversely extending arcuate handles 61, so that both sides of the sliding and lifting mechanism move simultaneously. Furthermore, the ramps of the rollers 56 are visible and are identified by reference numeral 30 in fig. 2b, 3b and 4 b.

The stopper 31 is formed differently on both sides. The right stop in the figures is formed so as to be visible also in the side views of fig. 1 and 2. The left stop in each figure has an additional fastening mechanism which secures the free end of the scissors lever 53 securely to the stop 31 when the wire basket 51 is raised. This additional fastening mechanism is shown in more detail in the enlarged views of the respective stop regions in fig. 2b, 3b and 4b and will be explained below. It is to be noted that such fixing means may be formed only on one of the two sides of the cutlery basket 5 having the sliding and lifting mechanism, as in the present case, or may also be formed on both sides.

In the present case, an additional fixing is achieved, since the free end of the scissors lever 53 extends beyond the bearing point, to which the front roller 56 is mounted, in the form of a tab 531. The front roller 56 is mounted on a bearing pin 533 in the transition between the scissor lever 53 and the tab 531. This bearing pin 533 is visible in fig. 3b and 4b, for example. At the front end of the tab 531, a fixing pin 532 is fastened, e.g., riveted, to the tab 531. Visible in each of fig. 2b, 3b and 4b is only the pin 532 secured in the tab 531. The pin 532 protrudes toward the opposite side with respect to the tab 531. With this projection, during the approach of the scissors lever 53 to the stopper 31, the pin 532 enters the guide curved surface 33, and the guide curved surface 33 is placed outside the stopper 31. The guide curved surface 33 has a shape substantially corresponding to an angular hook. In the upper region, the guiding curve 33 is formed substantially linearly, with a circular curved section facing downwards adjacent to the front end of the linear section (on the left in fig. 2b, 3b and 4 b).

When the pin 532 fully enters the upper linear section of the guiding curve 33, the pin 533 also presses against the stop surface on the stop 31. This stop surface corresponds to the stop surface 32 of the stop visible in fig. 1 a.

After reaching this stop position, the pivot lever 57 is actuated and the scissor mechanism is pulled upward to raise the wire basket 51. Due to this upward pull and the pivoting of the scissors lever 53 associated with this upward pull, the pin 532 enters into the curved segment of the guide curve 33 facing downwards. In this position, as can be seen, for example, in fig. 3b, the pin 532 can no longer move horizontally. Meanwhile, in this position, the pin 533 cannot yield upward because the pin 533 overlaps with a section of the stopper 31. Thus, only rotation about the pivot pin 533 occurs in this position. The pin 533 is prevented from translational movement. Thus, the scissors lever 53 is rotatably fixed in the stopper 31.

Finally, fig. 4b shows the arrangement in the maximum pivot position of the scissors lever 53.

The position of the sliding and lifting mechanism for the situation shown in fig. 2a and 2b is again shown in fig. 5a and 5b in cross-section.

Shortly before reaching the stop position of the last roller 56, the protuberances 34 in the ramp 30 are recognizable in fig. 5b, especially at the end of the ramp 30. This protuberance 34 must be overcome when approaching or moving away from the stop 31. In this case, the vertical movement that the tab 531 undergoes as the tab 531 travels over the protuberance 34 is taken into account in the guiding curved surface 33.

The bulge 34 represents an additional inversion protection which has been engaged when the pivot lever 57 has not been pivoted out of its base position, i.e. the wire basket 51 is still in the fully lowered position.

List of reference numerals

1 dishwasher

2 main body

21 side wall

3 equipment door

30 slide way

31 stop piece

32 stop surface

33 guide curved surface

34 bump

4 tableware basket

Tableware basket with sliding and lifting mechanism

51 iron wire basket

52 side panel

521 sliding guide

53. 54 scissor fork lever

53', 54' points of rotation

55 shear fork joint

56 roller

57 pivot lever

58 elbow lever

59 elbow joint

60 energy storage

61 arc-shaped handle

Claims

1. A sliding and lifting mechanism of a shelf of furniture or household equipment with a scissor mechanism for pulling the shelf out of a body of the furniture or household equipment and for lifting the shelf, wherein the sliding and lifting mechanism has a toggle joint (59) which is coupled to the scissor mechanism and locks the shelf in a raised position, wherein the toggle joint (59) is formed by a pivot lever (57) and a toggle lever (58) and occupies an overextended position, wherein the toggle joint is fixed by a stop with the shelf in the raised position, and wherein the scissor mechanism is formed by at least two intersecting scissor levers (53, 54) which are rotatably connected to each other and are each connected at one end to the shelf in a fixed and rotatable or rotatable and displaceable manner, characterised in that wherein the pivot lever (57) is rotatably connected to the shelf such that a user can pivot the pivot lever (57) and the elbow lever (58) is coupled to the scissor mechanism by being linked to one of the scissor levers (53, 54).

2. The sliding and lifting mechanism according to claim 1, wherein the scissor levers (53, 54) each have at least one roller (56) on a free end.

3. The sliding and lifting mechanism according to any of claims 1 and 2, wherein an energy storage (60) is coupled to the scissor mechanism.

4. The sliding and lifting mechanism according to claim 3, wherein the energy storage (60) is a compression spring connected with at least one of the scissor levers (53, 54).

5. The sliding and lifting mechanism according to claim 4, wherein the compression spring is connected to the elbow lever (58) or the pivot lever (57).

6. The sliding and lifting mechanism according to claim 1, wherein a scissor mechanism with a toggle joint (59) is arranged on each of two opposite sides of the shelf.

7. The sliding and lifting mechanism according to claim 1, wherein each of the toggle joints (59) has a pivot lever, wherein the free ends of the pivot levers (57) which are pivotable by the user are connected to each other by a common bow handle (61).

8. Furniture or household appliance with a body (2) and a shelf with a sliding and lifting mechanism, wherein the shelf can be pulled out of the furniture body and lifted by means of the sliding and lifting mechanism, characterized in that the sliding and lifting mechanism is designed according to any of claims 1 to 7.

9. Household appliance according to claim 8, having an appliance door (3), the appliance door (3) having at least one slide (30) for a roller (56) of the sliding and lifting mechanism.

10. Household appliance according to claim 9, wherein a stop (31) for the sliding and lifting mechanism is formed on the appliance door (3) at the end of the at least one slide (30).

11. Household appliance according to claim 10, wherein the sliding and lifting mechanism is engaged in the stop (31) in an at least partially raised state, so that it is rotatably connected to the stop (31).

12. Household appliance according to claim 11, wherein a protruding pin (532) is engaged in a curved guiding curve (33) formed in the stop (31), and the protruding pin (532) is arranged on a scissor lever (53) of a scissor mechanism of the sliding and lifting mechanism.

13. Household appliance according to claim 8, designed as a dishwasher (1), wherein the rack is a cutlery basket (5).