EP4258940A1

EP4258940A1 - Raising-lowering extraction device, and piece of furniture or household appliance

Info

Publication number: EP4258940A1
Application number: EP21835594.9A
Authority: EP
Inventors: Oscar Garcia; Iker Lopetegi; Benjamin BEXTERMÖLLER; Arnold GURR; Ander MARTINEZ
Original assignee: Paul Hettich GmbH and Co KG
Current assignee: Paul Hettich GmbH and Co KG
Priority date: 2020-12-08
Filing date: 2021-12-01
Publication date: 2023-10-18
Also published as: DE102020132674A1; WO2022122504A1

Abstract

Described is a raising-lowering extraction device (3) for a tray-type element (4) which is built into a carcass (2), in particular of a piece of furniture (1) or household appliance, the raising-lowering extraction device (3) comprising a carcass rail (5) that can be stationarily fastened to the carcass (2), a tray rail (6) which can be stationarily fastened to the tray-type element (4), and two central rails (7, 8) which are arranged to be slidable and pivotable with the carcass rail (5) and the tray rail (6) and which are coupled to one another so as to be mutually slidable in the direction of the longitudinal axis (L) thereof, the carcass rail (5) being coupled to a first central rail (7) via a first pivotable guiding link (10), and the tray rail (6) being coupled to a second central rail (8) via a second pivotable guiding link (11); a stabilizing unit (9) is arranged on the tray-type element (4) or the tray rail (6) and on the carcass (2) or the carcass rail (5), said stabilizing unit (9) comprising a guide slot (95, 95') which stabilizes the raising-lowering movement of the tray rail (6) and a guide element (92) which is guided in the guide slot (95, 95') at least in part of a raising-lowering movement of the tray rail (6). Also described is a piece of furniture (1) or household appliance comprising a raising-lowering mechanism of said type.

Description

Raise and lower pull-out device and furniture or household appliance

The present invention relates to a lifting/lowering pull-out device for a shelf built into a body, in particular a piece of furniture or a household appliance, according to the preamble of claim 1 .

The invention also relates to a piece of furniture or a household appliance with such a lifting and lowering pull-out device.

Generic lifting and lowering pull-out devices, known for example from EP 3 411 268 B1, are used, for example, to remove shelves arranged in a furniture body of a piece of furniture, such as a drawer or a shelf, from a position inside the body of the furniture or the household appliance from this both to drive out as well as to raise or lower.

Depending on the objects stored on the rack, a reliable movement sequence can be made more difficult, especially when loading with heavy objects and/or objects that are unevenly distributed.

The object of the present invention is to further develop a lifting and lowering extension device of the generic type in such a way that the movement sequence of the lifting and lowering extension device is stabilized.

This object is achieved by a lifting and lowering pull-out device with the features of claim 1 and by a piece of furniture or household appliance with the features of claim 10.

The lifting/lowering pull-out device according to the invention for a shelf built into a carcass, in particular a piece of furniture or a household appliance, has a carcass rail that can be fixed in place on the carcass, a storage rail that can be fixed in place on the shelf, and two that can be displaced and pivoted with the carcass rail and the storage rail and center rails which are coupled to one another and are displaceable relative to one another in the direction of their longitudinal axis. The body rail is coupled to a first center rail via a first pivoting guide bar. The storage rail is pivotally coupled to a second center rail via a second pivoting guide web.

A stabilization unit with a guide slot that stabilizes the lifting and lowering movement of the storage rail and a guide element that is guided in the guide slot at least in a partial section of a lifting and lowering movement of the storage rail is arranged on the shelf or the storage rail and the carcass or the carcass rail.

By providing such a stabilization unit, the storage rail is additionally guided, in particular during the lifting and lowering movement, so that a safe course of movement of the lifting and lowering pull-out device is ensured even when the storage is loaded with heavy objects.

Advantageous embodiments of the invention are the subject matter of the dependent claims.

According to an advantageous embodiment variant, a first plate is fastened or formed on the shelf or the shelf rail, on which the guide element is arranged. Correspondingly, a second plate is fastened or formed on the body or the body rail, on which the guide slot is arranged, in particular formed on.

According to an alternative embodiment variant, a first plate is fastened or formed on the shelf or the shelf rail, on which the guide slot is arranged, in particular formed on. Correspondingly, in this embodiment variant, a second plate is fastened or formed on the body or the body rail, on which the guide element is arranged.

According to a preferred embodiment variant, the guide element is designed as a wheel, bolt or sliding block and thus ensures reliable support of the storage rail during the lifting and lowering movement.

According to a further advantageous embodiment variant, the body rail, the storage rail and the center rails each have a guide groove which extends in the direction of their longitudinal axis and in which respective guide bolts are guided. In a preferred development, the middle rails, which are coupled to one another in a displaceable manner, are coupled to one another in a parallel offset manner. One of the guide bolts of the first center rail is guided in the guide groove of the second center rail. Correspondingly, one of the guide bolts of the second center rail is guided in the guide groove of the first center rail.

This coupling ensures a reliable longitudinal displacement of the two center rails relative to one another.

In a further preferred embodiment variant, the lifting/lowering pull-out device is coupled to a motor for motor-driven movement of the shelf.

According to a preferred development, a shaft that can be driven by the motor is coupled to a first end of the first pivoting guide web that is rotatably fixed to the body rail.

The arrangement of the motor at the first end of the first pivoting guide web is particularly advantageous, since the motor then disappears in the retracted state of the shelf in the body below the shelf.

The furniture or household appliance according to the invention with a body and at least one lifting and lowering extension device fastened in a receiving space of the body with a shelf, in which the shelf can be moved linearly and raised and lowered via the lifting and lowering extension device, is characterized by a how the lifting and lowering pull-out device described above.

Preferred exemplary embodiments are explained in more detail below with reference to the drawings. Show it:

FIG. 1 shows a schematic perspective representation of an embodiment variant of a piece of furniture according to the invention with a lifting and lowering pull-out device according to the invention arranged in a body,

FIG. 2 shows a side view of the lifting/lowering pull-out device and the body with the shelf pulled out of the furniture body, FIG. 3 shows a detailed view of the section designated III in FIG. 2 to show an embodiment variant of a stabilization unit,

FIG. 4 shows a representation corresponding to FIG. 3 with an alternatively designed stabilization unit,

FIG. 5 shows a side view of the lifting/lowering pull-out device in a starting position,

FIG. 6 shows a side view corresponding to FIG. 5 of the lifting/lowering pull-out device with a storage rail displaced linearly with respect to the cabinet rail,

FIG. 7 shows a detailed view of the detail labeled VII in FIG. 6 to show the threading of the guide element into the guide slot of the stabilization unit,

FIG. 8 shows an illustration corresponding to FIG. 6 with the storage rail lowered,

FIG. 9 shows a detailed view of the section designated IX in FIG. 8,

FIG. 10 is a perspective view of a lifting and lowering extension device with a lowered shelf and a motor-driven lifting and lowering extension device,

FIG. 11 shows a side view of the motor-driven lifting and lowering pull-out device shown in FIG

FIG. 12 is a plan view from above of the motor-driven lifting and lowering extension device according to FIG. 10.

In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc. refer exclusively to the exemplary representation and position of the lifting/lowering pull-out device, body, body rail, storage rail, center rail, chosen in the respective figures. Swivel guide bar and the like. These terms are not to be understood as limiting, ie these references can change as a result of different working positions or the mirror-symmetrical design or the like.

In FIGS. 1 and 2, the reference numeral 1 designates an embodiment variant of a piece of furniture according to the invention, in which an embodiment variant of a lifting/lowering pull-out device 3 according to the invention is fastened.

The piece of furniture 1 is designed here in the form of a shelf frame with four vertical struts 21 arranged parallel to one another, which are assembled together to form a body 2 by four lower horizontal struts 22 and four upper horizontal struts 23 .

Furthermore, a horizontal strut 25 is arranged between two vertical struts 21 arranged opposite one another and serves to fasten a respective carcass rail 5 .

Plate-shaped rail mounts 26 are provided for fastening the carcass rail 5 to the horizontal strut 25 , via which the respective carcass rail 5 is firmly connected to the horizontal strut 25 .

The structure of the piece of furniture 1 shown in FIGS. 1 and 2 is to be understood merely as an example. For example, side walls can be fastened to the vertical struts 21 so that the piece of furniture 1 is only open to one extension direction of the lifting/lowering extension device 3 .

Other shapes of the furniture carcass are also conceivable, or the design of the carcass 2 as a carcass of a household appliance with an interior space in which the raising/lowering extension device 3 or also several raising/lowering extension devices 3 arranged one above the other can be fastened.

In Figures 1 and 2, the lifting and lowering extension device 3 is shown in a position in which a shelf 4 of the lifting and lowering extension device 3 is linearly extended from the body 2 of the piece of furniture 1, here in the horizontal X direction. As is well shown in FIGS. 1, 2, 5, 6 and 8, the lifting/lowering pull-out device 3 has, in addition to the carcass rail 5 fixed in a stationary manner on the carcass 2, a storage rail 6 which can be fixed in a stationary manner on the shelf 4, and two with the carcass rail 5 and the storage rail 6, which are arranged in a displaceable and pivotable manner and are coupled to one another in a displaceable manner relative to one another in the direction of their longitudinal axis L.

The body rail 5 is pivotally coupled to a first center rail 7 via a first pivoting guide bar 10 .

In a corresponding manner, the storage rail 6 is pivotally coupled to a second middle rail 8 via a second pivoting guide bar 11 .

As can be seen clearly in FIG. 6, a first end 101 of the first pivoting guide bar 10, viewed in the extension direction X, is preferably pivotably fastened approximately centrally to the carcass rail 5.

A second end 102 of the first pivoting guide web 10 is rotatably attached to a rear end of the first center rail 7 in the extension direction X.

In a corresponding manner, a first end 111 of the second pivoting guide bar 11 is pivotably attached approximately centrally to the storage rail 6 and a second end 112 of the second pivoting guide bar 11 is pivotally fixed to a front end of the second center rail 8 in the extension direction X.

A guide pin 52 is fastened to a front end of the cabinet rail 5 in the extension direction X, which is guided in a guide groove 71 of the first middle rail 7, as is shown in FIG. 10 by way of example.

Correspondingly, a guide pin 62 of the storage rail 6 is guided in a guide groove 81 of the second center rail 8 .

Furthermore, a first guide pin 72 and a second guide pin 73 are fastened to the front end of the first center rail 7 in the extension direction X. The first guide pin 72 is guided in a guide groove 61 of the storage rail 6 . The second guide pin 73 of the first center rail 7 is guided in the guide groove 81 of the second center rail 8 .

Furthermore, a first guide pin 82 and a second guide pin 83 are fastened to a rear end of the second center rail 8 in the extension direction X. The first guide pin 82 is guided in the guide groove 71 of the first center rail 7 . The second guide pin 83 is guided in the guide groove 51 of the cabinet rail 5 .

As is also shown in FIGS. 1 to 11, this lifting/lowering pull-out device 3 has a stabilization unit 9 arranged on the shelf 4 or the shelf rail 6 and the body 2 .

In this exemplary embodiment, the stabilization unit 9 has a guide slot 95 that stabilizes the lifting/lowering movement of the storage rail 6 and a guide element 92 that is guided in the guide slot 95 at least in a partial section of a lifting/lowering movement of the storage rail 6 .

In the embodiment variant shown in FIGS. 4 to 11, a first plate 91 is fastened to the storage rail 6, on which the guide element 92, designed here as a wheel, is arranged.

In this embodiment variant, a second plate 94 is fastened to the body 2, on which the guide slot 95 is formed. In this embodiment variant, the guide slot 95 is shaped in such a way that the guide element 92 can be moved into a slightly funnel-shaped entrance area when the storage rail 6 is moved from the fully retracted position shown in Figure 5 and, in the extension direction X, transitions into a curve that slopes down in the extension direction X, around the To support lowering of the storage rail 6.

In the alternative embodiment variant shown in FIGS. 2 and 3, the guide element 92 is arranged on the second plate 94 fastened to the body 2 .

Correspondingly, the guide slot 95 ′ is fastened or formed on the plate 91 here, which is fastened on or formed on the shelf 4 or shelf rail 6 . For this purpose, the guide slot 95' is designed in such a way that the slightly funnel-shaped widened entrance area is formed on the front in the pull-out direction X and the Guide slot 95' is designed to rise rearwards in the extension direction X.

Instead of the guide element 92 designed as a wheel, it is also conceivable to design the guide element 92 as a bolt or sliding block.

Furthermore, it is also conceivable for the plate 91 to be molded onto the storage rail 6 .

In the embodiment variant shown here as an example in FIG. 6, the plate 91 is fixed to the storage rail 6 with fastening elements 93 .

The guide grooves 51, 61, 71, 81 extend in the direction of the longitudinal axis L of the respective rails, i.e. the body rail 5, the storage rail 6 and the two center rails 7, 8.

In order to enable the guide bolts 73, 82 of the two center rails 7, 8 to engage in one another in the respective guide grooves 71, 81, the center rails 7, 8, which are slidably coupled to one another, are coupled to one another in a parallel offset manner.

As shown in Figures 8 and 9, when the storage rail 6 is in the lowered state, the guide element 92 is disengaged from the guide slot 95.

A motor-driven movement of the tray 4 or the tray rail 6 is shown in FIGS. 10 to 12 as an example. Figures 10 to 12 show the fully lowered position of the storage rail 6 or storage 4.

In this embodiment variant, a motor 12 is arranged on one of the two oppositely arranged lifting/lowering pull-out devices 3 .

A shaft that can be driven by the motor 12 acts on a first end 101 of the first pivoting guide web 10 that is fixed rotatably on the carcass rail 2 .

As is illustrated schematically in Figure 10, the motor 12 can move the pivoting guide web 10 from a position shown in dashed lines (marked with 10"), which corresponds to the retracted position of the lifting/lowering extension device 3 shown in Figure 5, via a position marked 10 ' designated fellow position, as it corresponds to the horizontally extended position of the storage rail 6, shown in FIG.

FIG. 11 shows a side view of the position of the lifting/lowering pull-out device 3 shown in FIG. 10 and FIG. 12 shows a plan view.

The motor 12 is preferably placed on a bearing 13 which is preferably fixed to a corresponding crossbar (not shown) of the body 2 .

The movement of the motor-driven shelf 4 can be triggered, for example, via a button on the body or via a remote control. It is also conceivable to control via a wireless interface, such as in smart home applications, using common protocols (WLAN, Bluetooth, Zigbee, ZWave, ...) e.g. on the frequencies 433 MHz or 868 MHz, which allow both operation via Allow smartphone as well as by voice.

In principle, it is also conceivable to arrange the lifting/lowering pull-out device 3 in the body 2 in such a way that the shelf 4 can be moved out and lifted.

Reference List

1 furniture

2 body

21 vertical brace

22 lower horizontal brace

23 upper horizontal brace

25 horizontal brace

26 rail mount

3 Raise and lower pull-out device

4 tray

5 cabinet rail

51 guide groove

52 guide pins

6 storage rail

61 guide groove

62 guide pins

7 first middle rail

71 guide groove

72 first guide pin

73 second guide pin

8 second center rail

81 guide groove

82 first guide pin

83 second guide pin

9 stabilization unit

91 first plate

92 guide element

93 fastener

94 second plate

95 guide slot 95' guide slot

10 first pivot guide bar

101 first end 102 second end

11 second swivel guide bar

111 first end

112 second end

12 engine

13 Storage

L longitudinal axis X direction

Y direction

Z direction

Claims

Claims Raising and lowering pull-out device (3) for a shelf (4) built into a body (2), in particular a piece of furniture (1) or a household appliance

- a body rail (5) that can be fixed in place on the body (2),

- a storage rail (6) that can be fixed in place on the storage (4),

- two center rails (7, 8) arranged so as to be displaceable and pivotable with the cabinet rail (5) and the storage rail (6) and coupled to one another so as to be displaceable relative to one another in the direction of their longitudinal axis (L),

- wherein the cabinet rail (2) is pivotally coupled to a first center rail (7) via a first pivoting guide web (10) and the storage rail (6) is pivotally coupled to a second center rail (8) via a second pivoting guide web (11), characterized in that

- on the shelf (4) or the shelf rail (6) and the body (2) or the body rail (5) a stabilization unit (9) with a guide slot (95) that stabilizes the lifting and lowering movement of the shelf rail (6), 95') and a guide element (92) guided in the guide slot (95, 95') at least in a partial section of a lifting/lowering movement of the storage rail (6). Raising and lowering pull-out device (3) according to claim 1, characterized in that on the shelf (4) or the shelf rail (6) a first plate (91) is attached or formed, on which the guide element (92) is arranged and on the corpus

(2) or the body rail (5) a second plate (94) is fixed or formed, on which the guide slot (95) is arranged. Raise and lower pull-out device

(3) according to Claim 1, characterized in that a first plate (91) is fastened or formed on the shelf (4) or the shelf rail (6), on which the guide slot (95') is formed and on the body (2 ) or the carcass rail (5), a second plate (94) is fastened or formed, on which the guide element (92) is arranged.

4. lifting and lowering extension device (3) according to any one of the preceding claims, characterized in that the guide element (92) is designed as a wheel, bolt or sliding block.

5. Lifting and lowering pull-out device (3) according to one of the preceding claims, characterized in that the body rail (5), the storage rail (6) and the center rails (7, 8) each in the direction of their longitudinal axis (L) extending Have guide groove (51, 61, 71, 81), in which respective guide pins (52, 62, 72, 73, 82, 83) are guided.

6. Raising/lowering extension device (3) according to one of the preceding claims, characterized in that the center rails (7, 8) which are slidably coupled to one another are coupled to one another offset in parallel, with one of the guide bolts (73) of the first center rail (7) in the guide groove (81) of the second center rail (8) and one of the guide bolts (82) of the second center rail (8) is guided in the guide groove (71) of the first center rail (7).

7. Lifting and lowering pull-out device (3) according to one of the preceding claims, characterized by the lifting and lowering pull-out device (3) having a motor (12) for motor-driven movement of the shelf (4) is coupled.

8. Raising and lowering pull-out device (3) according to one of the preceding claims, characterized in that one of the motor (12) can be driven re shaft with a body rail (2) rotatably fixed first end (101) of the first pivoting guide web ( 10) is coupled.

9. Raising/lowering pull-out device (3) according to one of the preceding claims, characterized in that the guide slot (95, 95') is widened in the shape of a funnel in the entrance area.

10. Furniture (1) or household appliance with a body (2) and at least one in a receiving space of the body (2) fixed lifting and lowering pull-out device (3) with a shelf (4), wherein the shelf (4) on the lifting - Lowering extension device (3) can be moved linearly and can be raised and lowered, characterized in that the lifting and lowering extension device (3) is designed according to one of claims 1 to 9.