EP3998908B1 - Piece of furniture and method for assembling a piece of furniture - Google Patents

Description

The present invention relates to a piece of furniture, in particular seating furniture, with a base part on which a movable furniture part is pivotably mounted via at least one pivoting fitting, the at least one pivoting fitting being fixed to the base part with a first lever and with a second lever attached to the first lever pivotably arranged lever is fixed to the movable furniture part, the second lever being fixed to a shaped body which is provided with a large number of hollow chambers and forms a core of the movable furniture part and a pocket for receiving at least part of the second lever is formed in the shaped body, and methods of assembling a piece of furniture.

The DE 10 2015 113 749 A1 discloses a swivel fitting for an upholstered piece of furniture, in which two levers are rotatably mounted relative to one another, the two levers being able to be continuously fixed in different angular positions relative to one another via a clamping mechanism. This enables flexible use of the swivel fitting for armrests, footrests, siderests or other movable furniture parts.

Another swivel fitting is in the DE 10 2017 110 253 A1 shown, which also comprises two relatively rotatable levers that can be fixed in different angular positions via a clamping mechanism for fixing the lever. The clamping mechanism includes at least one pawl and a pinion. With such swivel fittings, the levers on the movable furniture part are connected to one another via a plate, for example a wooden board, and then surrounded by upholstery foam, which is arranged under a cover. The production of such upholstered movable furniture parts requires many work steps, and the use of different materials is disadvantageous with regard to later disposal.

The U.S. 5,375,914 discloses a piece of seating furniture in which a swivel fitting is fixed with a lever in a lateral receptacle of the seat part. To do this, screws are screwed into the lever and the seat part from the side.

EP 2532 275 discloses a swivel fitting with two levers that are fixed to a piece of furniture.

Movable furniture parts according to the known prior art usually consist of a wooden board as a carrier element for foam materials, a layer of wadding and upholstery fabrics. The swivel fittings are then screwed to these wooden boards using screws on the drive-in nuts previously introduced in the wooden board. On the one hand, this known structure is inflexible with regard to the design of the furniture part and, on the other hand, it requires very complex production steps, such as the gluing of foam materials.

It is therefore the object of the present invention to create a piece of furniture with a swivel fitting in which the movable furniture part can be mounted effectively. Furthermore, an optimized method for assembling a piece of furniture is to be provided. A further object is to make the construction and manufacture of a piece of furniture simpler, more flexible and suitable for simplified assembly.

This object is achieved with a piece of furniture having the features of claim 1 and a method having the features of claim 14.

In the piece of furniture according to the invention, the second lever of the swivel fitting is fixed to a shaped body which is provided with a multiplicity of hollow chambers and forms a core of the movable furniture part. This shaped body is pivotably mounted on one or more pivoting fittings and, depending on the application, can have different shapes, with a low intrinsic weight being present due to the provision of hollow chambers. This eliminates the construction of the core of the movable furniture part from a large number of different materials that have to be connected to one another. The shaped body can consist of a single material, in particular plastic, and fillers can also be added to the plastic, such as fibers containing lignocellulose, recycled fibers made of plastic or cotton, or substances in powder form.

According to the invention, a pocket for receiving at least part of the second lever is formed in the shaped body. The second lever can then be partially or fully inserted into the pocket and is preferably fixed there by clamping or latching. As a result, the shaped body can be mounted on the second lever without the use of tools. For this purpose, corresponding clamping contours, such as a wedge-shaped clamping contour, or a bendable latching web with a projection that engages in a recess on the lever can be formed on the pocket. The connection can either be permanent or also be designed to be detachable, for example by the flexible latching web being lifted out of the form-fitting engagement again by means of a release lever.

The shaped body preferably has a stiffening structure formed from webs, the webs surrounding the hollow chambers. The molded body can be made in one piece or composed of several individual parts. The assembly from individual parts has the advantage that the shaped body can be assembled in different lengths or widths, depending on the application. In this case, the shaped body can advantageously have areas with a higher ridge density and areas with a lower ridge density. In particular in the areas that are designed as a support surface for the head, arms or legs, greater resilience of the shaped body can be achieved through a lower web density, which increases the support comfort. In contrast, in the areas in which the pockets are arranged to accommodate at least part of the second lever, a higher web density is very advantageous for stiffening.

In an embodiment according to the invention, a slot is formed on the shaped body, through which the first lever is passed. The slot can extend over a predetermined angular range on a rounded edge of the shaped body in order to be able to pivot the shaped body relative to the first lever.

The shaped body preferably has a smooth surface on two opposite sides. This surface can serve as a support, with a different elasticity preferably being present on the surfaces due to the shaping of the shaped body. One surface can be designed to be more elastic, that is to say it can deform more elastically than the other surface under a predetermined contact pressure. This allows you to specify which surface is used as a support surface and which surface is used as an elastic surface. This can be done by adjusting the stiffening structure, resulting in higher stiffness on one side than the opposite side.

The shaped body or its individual parts are preferably produced by injection molding, extrusion or 3D printing. The proportion of hollow chambers in the shaped body, based on the total volume, can be more than 50%, for example between 60% and 95%. This allows the molding have a relatively low dead weight and already form the geometry that the movable furniture part is supposed to occupy approximately. The shaped body can form the movable furniture part directly, ie it can be accessible from the outside. However, a flexible cover is preferably applied around the shaped body. Such a flexible cover can be, for example, a cover made of leather, a textile material or an elastic plastic, which forms the outer surface of the movable furniture part. A further component can optionally also be fixed to the shaped body, such as a display with a screen, an operating unit and/or a controller, for example if a medium or an application is to be integrated into the movable furniture part. A corresponding receptacle can be formed on the shaped body for this purpose.

The movable furniture part can be pivotably mounted on the base part via two or more pivoting fittings. The movable furniture part can be designed as an armrest, footrest or headrest. The base part can be, for example, a seat of an upholstered piece of furniture or a vehicle seat. Furthermore, the base part can also be a treatment chair on which a movable furniture part is pivotably mounted.

The shaped body can preferably have a low intrinsic weight without a swivel fitting, for example less than 350 g, in particular between 50 g and 250 g.

The shaped body can be used with the swivel fitting for different applications, especially in vehicles. The term "furniture" should therefore not be understood in a restrictive manner, but should also include shelves, armrests or other movable components that are built into vehicles or ships or airplanes.

In the method according to the invention, a base part is provided, on which a first lever of a swivel fitting is fixed. A second lever of the swivel fitting is inserted into a molded body that has a large number of hollow chambers and is produced by injection molding, extrusion or 3D printing. This simplifies the assembly of the molded body, since it is simply attached to one or more levers. The shaped body can then optionally be surrounded with a flexible cover to complete the furniture.

Different types of swivel fittings can be used in the configuration according to the invention. In addition to swivel fittings, in which the first lever and the second lever are adjusted relative to one another about an axis of rotation via a clamping mechanism, other swivel fittings can also be used, for example, which, in addition to the swiveling movement, enable translational movements of the second lever relative to the first lever, as is the case, for example, with DE 20005850U or the DE202008001323U1 the case is. The second lever can then also be designed as a lever that can be moved in a translatory manner relative to the swivel fitting, or as an angle piece. In these cases, the pivoting takes place by means of a rotation or a combination of rotation and translation.

Within the scope of the invention, it is also possible to use swivel fittings in which the swiveling takes place by means of a different mechanical principle, such as that of a four-bar linkage or a multi-bar mechanism.

Regardless of the solution specified in claim 1, the invention can also relate to a piece of furniture, in particular a piece of seating furniture, comprising a base part and at least one furniture part which is connected to the base part via a movement fitting or a connecting fitting, the furniture part consisting of a Molded body provided with hollow chambers, which forms a core of the furniture part. The molded body can be designed according to the exemplary embodiment shown below, but without the swivel fitting. The movement fitting can be designed as a linear guide, pull-out guide or sliding fitting. As a result, the shaped body can also be used for displaceable headrests or other furniture parts. This invention can also be used with rigid furniture parts, so that the shaped body is only fixed via a connecting fitting, for example in a fixed back part. Then, for example, the straps that are stapled to the back parts could be omitted. Furthermore, the foam and the cotton would also be omitted here.

A further exemplary embodiment would also be the use of the invention in a seat part of a piece of furniture. The furniture part with the shaped body can be screwed to a body or attached to the body.

Figur 1

eine perspektivische Ansicht eines erfindungsgemäßen Möbels;

Figur 2

eine perspektivische Ansicht des bewegbaren Möbelteils mit zwei Schwenkbeschlägen;

Figur 3

eine Schnittansicht durch den Formkörper der Figur 2;

Figur 4

eine perspektivische Explosionsdarstellung des bewegbaren Möbelteils der Figur 2;

Figuren 5A und 5B

zwei Detailansichten eines Einzelteils des Formkörpers, und

Figur 6

eine Ansicht eines modifizierten Einzelteils.

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

figure 1

a perspective view of a piece of furniture according to the invention;

figure 2

a perspective view of the movable furniture part with two swivel fittings;

figure 3

a sectional view through the molding of figure 2 ;

figure 4

an exploded perspective view of the movable furniture part figure 2 ;

Figures 5A and 5B

two detailed views of a single part of the molded body, and

figure 6

a view of a modified part.

A piece of furniture 100 is designed as a piece of seating furniture and includes a base part 104 which has a seat and a frame for supporting or fastening the base part 104 . The piece of furniture 100 shown schematically has a movable furniture part 101 which is designed as a pivotable head part and is connected to a backrest of the base part 104 via one or more pivoting fittings 1 . Furthermore, a movable furniture part 102 is provided as a side part on opposite sides, which is also connected to a frame of the base part 104 via one or more swivel fittings 1 . Another movable furniture part 103 is designed as a foot part and is connected to the base part 104 via one or more swivel fittings 1 . In all movable furniture parts 101, 102 and 103, a first lever 2 of a swivel fitting 1 is fixed to the base part 104, while a second lever 3, which is pivotably mounted on the first lever 2 and can be fixed in different angular positions, is fixed to the movable furniture part 101, 102 or 103 set. The piece of furniture 100 can be designed as upholstered furniture, such as an armchair, sofa, bed, but also as a vehicle or aircraft seat or as a treatment chair. The movable furniture parts can also be used in mobile homes, ships or other vehicles.

In figure 2 a shaped body 4 is shown, which forms a core of a movable furniture part 101, 102 or 103 and two swivel fittings with the Base part 104 is connected. The shaped body 4 consists of a large number of individual parts 40, 41 and 42 which are combined to form a unit. The individual parts 40, 41 and 42 can be plugged into one another, fixed to one another by fastening means or glued together.

A slot 43 is formed on the shaped body 4 in the region of the pivoting fitting 1, through which the first lever 2 of the pivoting fitting 1 is passed. When the shaped body 4 is adjusted by turning the pivot fitting 1, the shaped body 4 pivots relative to the first lever 2, and the slot 43 is correspondingly cut out by a certain angular section in the shaped body 4.

In figure 3 the shaped body 4 is shown in section. The shaped body 4 comprises a multiplicity of hollow chambers 7 which are surrounded by webs 8 of a stiffening structure. The webs 8 of the stiffening structure can be arranged in a truss-like manner in order to support the shaped body 4, the shaped body 4 having a substantially smooth surface 5 and 6 on opposite sides, respectively. The surfaces 5 and 6 are supported by the stiffening structure formed from webs 8 . The proportion of the hollow chambers 7 based on the total volume of the shaped body 4 is over 50%, for example between 70% and 95%. In this respect, the shaped body 4 can be produced with a large volume and low weight. The molded body 4 or the individual parts 40, 41 and 42 of the molded body are preferably produced by injection molding, extrusion or 3D printing.

Two pockets 20 are formed on the shaped body 4 and have a cross-sectional geometry that essentially corresponds to the cross-sectional geometry of the lever 3 . The lever 3 is plate-shaped, and the pockets 20 are correspondingly provided with a rectangular cross-section. The lever 3 can be fixed in a clamping or latching manner on the pockets 20 of the shaped body 4, so that assembly without the use of tools is possible. Optionally, the lever 3 can also be glued or screwed to the shaped body 4 .

The lever 3 can also have a different geometry, for example it can be designed as an L-shaped angle piece, in which case the pocket 20 also has a corresponding geometry.

Each item 40 includes connecting means 9, which are designed as thickened strips, the holding means 10 of an adjacent item 40, 41 or 42 can be fixed by latching, static friction or insertion. The holding means 10 are designed, for example, as a groove which encompasses the connecting means 9 . These connecting means 9 and holding means 10 are provided both between the individual parts 40 and between the individual parts 41, the individual parts 41 being arranged at the edges. A groove 16 delimited by webs is formed on the end face of the individual parts 41, in which further components can be fixed, for example a seam of a flexible cover for the shaped body 4. Slots are also formed between the individual parts 40 in the region of the surface 5. In addition, the slit-shaped grooves 16 serve to increase the mobility of the individual part 40.

The surfaces 5 and 6 have different elasticity when a contact pressure is applied. The reason for this is that the stiffening structure of the webs 8 in the area adjacent to the surface 5 is designed differently than adjacent to the surface 6. An additional reinforcement web 11 is provided adjacent to the surface 6, which is missing adjacent to the surface 5. As a result, the surface 5 is designed to be more elastic than the surface 6 when contact pressure is applied, which can be used, for example, to optimally adapt the spring properties on the surface 5 to the intended use.

In figure 4 the shaped body is shown in a view during assembly. The two swivel fittings 1 comprise the two levers 2 and 3, which are rotatably mounted about an axis 12 and can be fixed in different angular positions to one another, as is shown in FIG DE 10 2017 110 253 A1 and DE 10 2015 113 749 A1 is revealed. The swivel fitting 1 shown in the exemplary embodiment is only an example. Other types of pivot fittings or pivot fittings with additional linear motion can also be used.

During assembly, the bar-shaped lever 3 is inserted into a pocket 20 and fixed or pressed there, which is formed on the individual part 41 of the shaped body 4 . In the middle area between the two edge-side individual parts 41, two central individual parts 40 are provided, which can be fixed to one another by inserting the connecting means 9 on the holding means 10, with the number of individual parts 40 in the central area being able to be varied depending on the application in order to increase the length of the molding 4 to change. On opposite sides 4 items 42 are provided on the longitudinal edges of the molded body, which are arranged at the edge. The two Individual parts 42 on the side of the swivel fittings 1 include the slot 43 for carrying out the lever 2 in the area of a rounded edge. The slot 43 or clearance is needed to allow the pivot fitting 1 to pivot. Due to the pivoting, the lever 2 needs a free space, since it would otherwise strike the individual part 42 .

Items 42 are also provided on the opposite side, which are fixed to items 40 and 41 via plugs 13 and 14 . The plugs 13 and 14 have a cross-sectional contour which is adapted to the contour of the hollow chambers 7 on the individual parts 40 and 41, so that the plugs 13 and 14 can be fixed to the individual parts 40 and 41 in a clamping manner. Optionally, the plugs 13 and 14 can also be glued or screwed to the individual parts 40 and 41.

In the Figures 5A and 5B an individual part 42 of the shaped body 4 arranged on the longitudinal edges is shown in detail. It can be seen that a slit-shaped receptacle 15 is formed on the rounded edge, into which a component can be inserted, for example a seam or a quick-mounting profile of a flexible cover that surrounds the molded body 4 . The plugs 13 and 14 can also be seen, which can be inserted into the hollow chambers on the individual parts 40 and 41.

In the illustrated embodiment, the shaped body 4 is composed of eight individual parts 40, 41 and 42. The number of individual parts can of course vary, depending on the size and shape of the molded body 4. In the illustrated embodiment, the molded body 4 is essentially plate-shaped with a flat, smooth surface 5 on the top and a flat, smooth surface 6 on the underside. Other geometries of a shaped body 4 can also be used, for example in a curved or angled shape.

In figure 6 a modified item 40' for a molded body is shown. As in the previous exemplary embodiment, the individual part 40' comprises connecting means 9 in the form of strips which can be fixed to U-shaped holding means 10 of an adjacent individual part 40', 40, 41 or 42. The surfaces 5' and 6' are not smooth, but are in the form of a lattice. You can also have a different elasticity when applying a contact pressure.

A shaped body 4 according to the invention can also be used for an immovable furniture part, in particular a head part, an arm part or a back part. Due to the modular structure and the low weight, an optimized and individually configurable piece of seating furniture is created while at the same time improving the support properties. The otherwise rigid furniture parts can be connected to the base part via rods, which may be height-adjustable. The rods can be fixed in the shaped body 4 without the use of tools, analogously to the levers 3 . The rods then form a connection fitting.

In addition to head parts, arm parts and footrests, a back part can also represent a shaped body 4 according to the invention or a movable furniture part according to the invention.

The levers 2 and 3 can also perform a combined rotary and sliding movement instead of a pure rotary movement about an axis. Furthermore, the levers can also be arranged pivotably relative to one another via a multi-joint mechanism.

The shaped body can also be filled in the area of the cavities. Furthermore, the shaped body can have a body with an air-filled film or a film with scraps of material as a flexible structure.

When the parts of the molded body are 3D printed, the surfaces can be latticed or have a honeycomb structure to achieve weight savings and even better spring properties.

Reference List

1

swivel fitting

2

lever

3

lever

4

molding

5, 5`

surface

6, 6`

surface

7

hollow chamber

8th

web

9

lanyard

10

holding means

11

reinforcement bar

12

axis

13

Plug

14

Plug

15

Recording

16

groove

20

Bag

40, 40'

item

41

item

42

item

43

slot

100

Furniture

101

furniture part

102

furniture part

103

furniture part

104

base part

Claims (14)

1. Piece of furniture (100), in particular seating furniture, comprising a base part (104) on which a movable furniture part (101, 102, 103) is pivotably mounted via at least one pivot fitting (1), wherein the at least one pivot fitting (1) is fixed to the base part (104) by means of a first lever (2) and is fixed to the movable furniture part (101, 102, 103) by means of a second lever (3) which is arranged pivotably with respect to the first lever (2), wherein the second lever (3) is fixed to a molded body (4) which is provided with a plurality of hollow chambers (7) and which forms a core of the movable furniture part (101, 102, 103) and a pocket (20) for accommodating at least part of the second lever (3) is formed in the molded body (4), characterized in that a slot (43) is formed on the molded body (4) through which the first lever (2) is passed.
2. Piece of furniture according to claim 1, characterized in that the second lever (3) is fixed in the pocket (20) in a clamping and/or latching manner.
3. Piece of furniture according to claim 1 or 2, characterized in that a stiffening structure formed by webs (8) is formed in the molded body (4) and the hollow chambers (7) are arranged between the webs (8).
4. Piece of furniture according to one of the preceding claims, characterized in that the molded body (4) is designed substantially plate-shaped and is composed of a plurality of individual parts (40, 41, 42).
5. Piece of furniture according to one of the preceding claims, characterized in that the molded body (4) has a substantially smooth or grid-like surface (5, 6) on two opposite sides.
6. Piece of furniture according to claim 5, characterized in that the two surfaces (5, 6) have a different elasticity due to the shaping of the molded body (4).
7. Piece of furniture according to one of the preceding claims, characterized in that the molded body (4) or the individual parts (40, 41, 42) of the molded body (4) are produced by injection molding, extrusion or 3D printing.
8. Piece of furniture according to one of the preceding claims, characterized in that the proportion of hollow chambers (7) in the molded body (4) in relation to the total volume is over 50%, in particular between 60% and 95%.
9. Piece of furniture according to one of the preceding claims, characterized in that the molded body (4) is surrounded on its outside by a flexible cover.
10. Piece of furniture according to one of the preceding claims, characterized in that the movable furniture part (101, 102, 103) is pivotably mounted on the base part (104) via two or more pivot fittings (1).
11. Piece of furniture according to one of the preceding claims, characterized in that the movable furniture part (101, 102, 103) is designed as an armrest, footrest or headrest.
12. Piece of furniture according to one of the preceding claims, characterized in that the base part (104) is formed as a seat or back part of an upholstered piece of furniture or a vehicle seat.
13. Piece of furniture according to one of the preceding claims, characterized in that an additional component, such as a display, an operating unit and/or a control unit, is fixed to the molded body (4).
14. Method for assembling a piece of furniture, in particular a piece of seating furniture, comprising the steps of:

    - providing a base part and fixing a lever of a pivot fitting to the base part;

    - producing a molded body (4) formed from one or more individual parts (40, 41, 42) by injection molding, extrusion or 3D printing with a plurality of hollow chambers, wherein a pocket (20) for accommodating at least part of the second lever (3) is formed in the molded body (4), and

    - mounting the molded body (4) on a second lever of the pivot fitting and fixing the molded body to the second lever for pivotable mounting of the molded body (4) on the base part (104), wherein a slot (43) is formed on the molded body (4) through which the first lever (2) is passed.

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