EP3300635A1 - Cushioning assembly for an item of seating furniture, method for producing a cushioning assembly, chair - Google Patents

Abstract

The present invention relates to a cushion arrangement for a chair, in particular backrest cushion for an office or conference chair, comprising: a support frame; a continuous sheet membrane clamped in the support frame; a cushion body which is loosely applied to the membrane; and a cover which spans the cushion body and is secured to the support frame. The present invention further relates to a method for their preparation and a chair, in particular office or conference chair, with such a cushion arrangement.

Description

FIELD OF THE INVENTION

The present invention relates to a cushion arrangement for a chair, in particular for an office or conference chair, a method for producing a cushion arrangement and a chair, in particular office or conference chair.

TECHNICAL BACKGROUND

It is well known to provide seating with a cushion arrangement. A cushion assembly typically includes a cushion body covered with a cover.

The cover is usually attached to a back shell or plate. To attach the cover, for example, a bag cover can be used with lashing collar. The bag cover is slipped over the upholstery side of the back shell or plate together with the upholstery body and lashed to the back. Alternatively, a cover can also be nailed or stapled to the back.

The back shell or plate is then usually screwed to a frame, which conceals with its back the back of the back shell or plate. Particularly often such upholstery arrangements can be found in the backrests of office swivel chairs.

A possibility improved from a design and mounting perspective is to lock a cushion support, to which a cushion body and a cover are fastened, into a frame. A corresponding padding arrangement is in the DE 10 2012 218 978 A1 described. However, such an arrangement still has a certain thickness.

SUMMARY OF THE INVENTION

Against this background, the present invention seeks to provide an improved cushion arrangement.

According to the invention, this object is achieved by a cushion arrangement having the features of patent claim 1 and / or by a method having the features of patent claim 7 and / or by a chair having the features of patent claim 13.

• Eine Polsteranordnung für ein Sitzmöbel, insbesondere Lehnenpolster für einen Büro- oder Konferenzstuhl, mit: einem Trägerrahmen; einer in den Trägerrahmen eingespannten durchgehenden flächigen Membran; einem Polsterkörper, welcher lose auf die Membran aufgebracht ist; und einem Bezug, welcher den Polsterkörper überspannt und an dem Trägerrahmen befestigt ist.
• Ein Verfahren zur Herstellung einer Polsteranordnung, insbesondere einer erfindungsgemäßen Polsteranordnung, mit den Schritten: Bereitstellen eines Trägerrahmens, eines thermisch schrumpfbaren Netzes oder Gewebes, eines Polsterkörpers und eines Bezugs; Befestigen des Netzes oder Gewebes an dem Trägerrahmen; Aufbringen einer Vorspannung auf das Netz oder Gewebe durch Erhitzen; Aufbringen des Polsterkörpers lose auf das Netz oder Gewebe; Überspannen des Polsterkörpers mit dem Bezug; und Befestigen des Bezugs an dem Trägerrahmen.
• Ein Stuhl, insbesondere Büro- oder Konferenzstuhl, der eine Rückenlehne mit einer erfindungsgemäßen Polsteranordnung und/oder hergestellt mit einem erfindungsgemäßen Verfahren aufweist.

Accordingly, it is provided:

• A cushion arrangement for a chair, in particular backrest cushion for an office or conference chair, comprising: a support frame; a continuous sheet membrane clamped in the support frame; a cushion body which is loosely applied to the membrane; and a cover which spans the cushion body and is secured to the support frame.
• A method of producing a cushioning arrangement, in particular a cushioning arrangement according to the invention, comprising the steps of: providing a support frame, a thermally shrinkable mesh or fabric, a cushioning body and a cover; Attaching the net or fabric to the support frame; Applying a bias to the mesh or tissue by heating; Applying the cushion body loosely to the net or tissue; Spanning the upholstery body with the cover; and attaching the cover to the support frame.
• A chair, in particular office or conference chair, which has a backrest with a cushion arrangement according to the invention and / or produced by a method according to the invention.

The knowledge / idea on which the present invention is based is to form a cushion arrangement instead of a cushion support with a continuous flat membrane clamped in the support frame and to arrange a cushion loosely on the membrane under a cover.

The membrane has a predetermined flexibility and in particular elasticity. In this way it is achieved that the padding arrangement can be made very slim and yet a spatial cushioning effect is achieved.

The membrane is flat, in particular continuous flat, formed. It is thus in particular a homogeneous planar structure, such as a net or a fabric. Thus, it is preferably not a plurality of individual strands but a common inseparable planar training.

The spatial cushioning effect is achieved in that the membrane can yield to a pressure exerted on the pad assembly pressure and the loosely applied pad body moves with it. Thus creates a spatial cushioning effect as in a thicker cushion body. In fact, however, the cushion body may be formed very thin, for example, with a thickness of less than 2 cm. Thus, it is possible to keep a total thickness of the cushion assembly very low, for example, a maximum of 3 cm. Thus, enormously slender designs of a cushion arrangement, in particular in a back of a chair, are possible.

On the one hand this reduces the space requirement and on the other hand it allows new possibilities in the design of seating furniture.

The loose arrangement of the cushion body on the membrane has in particular no attachment of the cushion body with the membrane. However, it may be provided with the support frame, a local or circumferential attachment of the cushion body.

The support frame is, in particular, a circumferential frame which encloses a central recess. This central recess is in particular spanned or filled by the membrane. The recess is particularly continuous.

For clamping the membrane in the support frame, the membrane is attached to the support frame, in particular fixed circumferentially. This can be provided in different ways, for example by positive engagement, adhesion or adhesion.

In particular, it is a thermoelastic membrane, which is shrinkable by heating or shrunk and in this way can be prestressed or prestressed.

Advantageous embodiments and further developments will become apparent from the other dependent claims and from the description with reference to the figures of the drawing.

According to one embodiment, the cushion body is attached to the support frame. In this way it is defined in terms of its positioning, but due to the loose arrangement on the membrane but still against the membrane movable. Thus, a high compliance of the cushion arrangement and thus a spatial cushioning effect can be achieved.

According to an advantageous embodiment, the membrane has a hooking structure arranged continuously at its edge and hooking means corresponding to the support frame, to which the membrane is received by means of the hooking structure. In this way, a particularly simple mounting is made possible by hooking.

According to an advantageous development, the hooking structure is formed with a perforated strip. Advantageously, it is thus a prefabricated suspension structure that only needs to be connected to the membrane. Alternatively, a perforated piping may be provided. The perforated strip or the perforated piping is attached to the membrane, in particular sewn, angegetackert, welded or the like.

According to an advantageous embodiment, the membrane has a thermo-shrinkable mesh or fabric. Furthermore, a bias applied by heating is provided in all expansion directions of the mesh or fabric. Advantageously, the prestressed mesh or fabric is thus very easy to install by simply secured in a non-shrunken state without tension or with play on the support frame, in particular hung, is, the bias is applied only by a subsequent heating. In particular, the thermo-shrinkable mesh or fabric is designed to be continuous flat and attached to the edge with the perforated piping or the perforated strip, so that the bias acts in all expansion directions.

According to one embodiment, on the rear side, on a side facing away from the cushion body, there is a filling foam on the membrane applied. In this way, the membrane is optically advantageous backfilled. Alternatively or additionally, a back foam may be provided, which covers in particular the entire back including the support frame and thus provides an aesthetic rear closure for the post assembly. In particular, the filling and / or backfoam is applied loosely to the membrane. Further, it may be covered in the same way as the cushion body with a rear-side cover, which is in particular attached to the support frame. Thus, a particularly slender, yet completely padded or upholstered cushion arrangement is advantageously created.

According to one embodiment of the method of manufacture, attaching the net or fabric to the support frame comprises suspending a hooking structure provided on an edge of the net or fabric into hooking means provided on the support frame. Advantageously, an easy-to-mount attachment is provided in this way by hanging.

According to one embodiment, attaching the mesh or fabric to the support frame is preceded by a step of attaching a perforated strip or a perforated strip as a hooking structure to the mesh or fabric. This can be done in particular by sewing, Antackern or welding. The perforated strip or the perforated piping are in particular prefabricated parts, so that the provision of the hooking structure is made particularly simple, in particular with a single step of fastening.

According to a preferred embodiment, mesh or fabric comprises a vulcanizable polymer, wherein heating causes vulcanization of the polymer and shrinks the mesh or fabric. Preferably, the polymer is only partially vulcanized in an initial state of the network or fabric. In particular, it is only vulcanized out on heating, as a result of which it shrinks. A shrinkage is advantageously provided in this way, wherein in the shrunken state, a flexibility or elasticity of the network is ensured.

According to a preferred embodiment, the heating is carried out in an oven at a vulcanization temperature of the polymer for a short time, in particular 10 to 300 seconds, preferably 30 to 120 seconds, particularly preferably 45 to 75 seconds. This period of time is sufficient to achieve a degree of vulcanization predetermined for the shrinkage. In this way, the shrinkage is possible very quickly or with a short processing time.

According to an advantageous embodiment, the fastening of the net or fabric to the support frame is performed circumferentially and the shrinkage of the net or fabric is carried out in all directions of expansion. The peripheral attachment is preferably at least almost completely encircling, for example, only with recessed corners. In particular, it is a shrinkage in all expansion directions by more than 10%, preferably from 15% to 18%. Shrinkages of up to 30% in individual expansion directions are also possible.

According to one embodiment, the application of the cushion body loosely on the net or tissue comprises a local fixing of the cushion body to the support frame. It may also be a circumferential fixing of the cushion body to the support frame. Advantageously, the cover is easier to assemble in this way, since the padded body is fixed to the net or tissue despite the loose application.

According to an advantageous embodiment of a chair, the support frame is designed as a backrest frame. The support frame can serve in this way at the same time as a structural component of the chair.

According to a particularly preferred embodiment, the backrest has at least predominantly a local thickness of less than 3 cm. This small thickness is made possible by means of the cushion arrangement according to the invention and on the one hand reduces the space requirement and on the other hand allows new possibilities in the design of such chairs.

The above embodiments and developments can, if appropriate, combine with each other as desired. In particular, all the features of the cushion assembly are transferable to a method of manufacture, and vice versa. In addition, all the features of the cushion arrangement can be transferred to a chair.

Further possible refinements, developments and implementations of the invention also include combinations, not explicitly mentioned, of features of the invention described above or below with regard to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

CONTENT OF THE DRAWING

Fig. 1

eine schematische Schnittansicht einer Polsteranordnung;

Fig. 2

eine schematische Draufsicht auf eine in einen Trägerrahmen einspannbare Membran;

Fig. 3

eine Längsschnittansicht durch eine Rückenlehne eines Stuhls;

Fig. 4

eine Detailansicht der Rückenlehne gemäß Fig. 3;

Fig. 5

einen Stuhl mit einer Rückenlehne gemäß Fig. 3 und 4.

The present invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures of the drawing. It shows:

Fig. 1

a schematic sectional view of a cushion assembly;

Fig. 2

a schematic plan view of a clamped in a support frame membrane;

Fig. 3

a longitudinal sectional view through a backrest of a chair;

Fig. 4

a detailed view of the backrest according to Fig. 3 ;

Fig. 5

a chair with a backrest according to Fig. 3 and 4 ,

The accompanying figures of the drawing are intended to convey a further understanding of the embodiments of the invention. They illustrate embodiments and, together with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the stated advantages will become apparent with reference to the drawings. The elements of the drawings are not necessarily shown to scale to each other.

In the figures of the drawing are the same, functionally identical and same-acting elements, features and components - unless otherwise stated - each provided with the same reference numerals.

DESCRIPTION OF EMBODIMENTS

Fig. 1 shows a schematic sectional view of a cushion assembly. 1

The cushion arrangement 1 has a support frame 2, in which a flat membrane 3 is clamped.

Further, a cushion body 4 is loosely applied to the membrane 3 and covered with a cover 5 which is fixed to the support frame 2.

The support frame 2 is preferably a circulating support frame, in which the membrane is circumferentially clamped. For clamping the membrane 3 is attached to the support frame 2, for example, form, material or non-positive.

The membrane 3 is preferably in the mounted state under a bias. In particular, it is a thermoelastic membrane, which is shrunk after being attached to the support frame 2 by heating and biased in this way.

The cushion body 4 is preferably attached, at least locally, to the support frame 2. The attachment of the cushion body to the support frame 2 is made before the cover. For example, it may be a circumferential attachment, in particular by gluing. In this way, the covering without slippage of the cushion body 4 is possible.

Fig. 2 shows a schematic plan view of a clamped in a support frame 2 membrane. 3

The membrane 3 has a thermoelastic network or fabric 9, which is formed continuously flat.

To this end, suspension structures 6 in the form of perforated strips 8 are provided, which have holes 12 which are suitable for being suspended at regular intervals and are attached to the net or fabric 9 by fastening means 13. For example, fasteners 13 may be staples act, by means of which the perforated strips 8 are tacked to the net or fabric 9.

In a further embodiment, the Einhängstruktur can be provided in the same way in the form of perforated springs. Such perforated piping are formed in the plan view same as the perforated strips of cloth and have on their outer edge a Kederwulst on. In this case, the fastening means 13 may preferably be formed as seams, with which the piping are sewn to the net or fabric 9 in the region of its inner edge.

The net or fabric 9 is shrinkable in all expansion directions by heating. It is a partially vulcanized polymer material which is shrinkable by heating to vulcanization temperature, for example about 140 ° C, by 15 to 18 percent in all expansion directions. For example, suitable nets are sold by H.R. Rathgeber GmbH & Co. KG under the name "ilira-stretch type NRAM".

For assembly, the net or fabric 9 is hung in hooking means 7 of the support frame 2 and then heated in the oven for about 1 minute. The shrinkage achieved thereby leads to a bias of the network or fabric 9, so that the membrane 3 is clamped in the support frame 2.

Subsequently, a cushion body 4 is loosely applied to the membrane 3, and covered with the cover 5. To secure the position, the upholstery body 4 can be fixed or fastened, for example adhesively bonded, locally or circumferentially with the support frame before being covered. The cover 5 is fixed to the support frame 2.

Fig. 3 shows a longitudinal sectional view through a backrest 11 of a chair.

In particular, this is an example of a backrest 11 for an office chair or conference chair with tilt function.

The backrest 11 has a peripheral support frame 2, which is designed here as a backrest frame and has a corresponding lordosis-friendly contour. Although here the contour of the frame itself is shown only in the region of a headrest 16 and in a connection region 15 to a backrest support 14, but essentially corresponds to the here shown in section S-shaped contour of the backrest eleventh

In the support frame 2, a continuous sheet-like thermoelastic membrane 3 is clamped. It is hooked to the support frame 2, what in relation to Fig. 4 will be discussed in more detail.

Furthermore, a cushion body 4 is loosely applied to the membrane 3. The cushion body 4 extends here by way of example from the connection region 15 to a headrest 16 over the entire height of the backrest 11 and also covers the support frame 2, to which it is attached locally. The contour of the cushion body is in each case partially recessed in the region of the support frame 2, so that it on the side facing an occupant, i. on the side facing away from the membrane 3, on which it is coated with a cover 5, has a harmonious course.

Accordingly, the cushion body 4 in the connection region 15 is only very thin, for example, thinner than 1 cm, in the region of the membrane 3 with a uniform but still relatively small thickness, for example, 1.5 to 2.5 cm and in the headrest 16 with a slightly larger thickness, for example 3 to 4 cm, executed.

In addition, at a rear side of the membrane 3, a filling foam 18 back-feeding the membrane 3 as well as a back foam 17 covering the entire rear side of the backrest 11 down to the connection region 15 are provided. The backsheet 17 is in turn coated with a cover 19 attached to the support frame 2.

In the connection region 15, the support frame 2 is connected via fastening means 20 to the backrest support 14, in this case by way of example via a form-locking connection which is not visible in the sectional view and via the screws shown.

Fig. 4 shows a detailed view of the backrest 11 according to Fig. 3 ,

In this view, the running as a perforated strip 8 Einhängstruktur 6 of the membrane 3 and executed as a hook hooking means 7 of the support frame 2 are shown in section.

The stapled to the net or fabric 9 of the membrane 3 with the fastening means 13 designed as a staple fastener strip 8 is hooked into the hooks, wherein the biased net or fabric 9 of the membrane 3 exerts a perforated strip 8 in positive engagement with the hook tensile force ,

The cushion body 4 has a recess in the region of the hooking means 7 and thus compensates the contour of the hook.

At a front side of the backrest 11 of the cover 5 is guided over the cushion body 4 to the underside of the support frame 2 and attached thereto.

At the attachment point of the support frame 2 is covered to the outside by the backrest support 14. For attachment, the cover 5, therefore, without regard to the optics attached to the attachment point on the support frame 2, for example, angegetackert be.

In the same way, an attachment of the rear cover 19 is provided on the support frame 2 in a hidden by the backrest support 14 area.

Fig. 5 shows a chair 10 with a backrest 11 according to Fig. 3 and 4 in a side view.

The chair 10 is formed as a pivoting conference chair and in addition to the backrest 11 has a rotatable foot 21, a seat surface 22 and an armrest 23. The foot 21 is coupled to the seat surface 22 via a tilt mechanism 24.

An alternative embodiment of the chair 1 as an office chair comprises in particular additional rollers attached to the foot 21.

The chair 10 has an overall very slim design, in particular, the backrest is very thin and in the area between a connection region 15 and a headrest 16 has a local thickness of less than 3 cm.

The cushioning properties of the backrest 11 are still with the spatial cushioning effect, which with a conventional clearly thicker upholstery body is achievable, comparable.

Although the present invention has been fully described above with reference to preferred embodiments, it is not limited thereto but is modifiable in a variety of ways.

For example, a Füllschaum 18 and / or a backsheet 17 for the cushioning function is not necessarily provided. It would also be conceivable, without such filling foam and / or backfoaming, to provide a rear cover 19 directly over the back of the cushion arrangement 1 or optionally also only over the back of the membrane 3. It would also be conceivable to provide an unrelated rear side.

The attachment or the clamping of the membrane in the support frame can be realized instead of by hanging in other ways, in particular cohesive or non-positive. For example, the membrane can be clamped or welded to the support frame and then applied by heating the bias.

LIST OF REFERENCE NUMBERS

1

pad assembly

2

support frame

3

membrane

4

cushion body

5

reference

6

Einhängstruktur

7

hooking means

8th

Lochkeder

9

Net or tissue

10

chair

11

backrest

12

hole

13

fastener

14

Backrest support

15

connecting region

16

headrest

17

rear foam

18

Füllschaum

19

reference

20

fastener

21

foot

22

seat

23

armrest

24

tilt mechanics

Claims (15)

Upholstery arrangement (1) for a chair, in particular backrest cushion for an office or conference chair, comprising: a support frame (2); a in the support frame (2) clamped flat membrane (3); a cushion body (4) which is loosely applied to the membrane (3); and a cover (5) spanning the cushion body (4) and fixed to the support frame (2). Upholstery arrangement according to claim 1,
characterized,
in that the cushion body (4) is fastened to the support frame (2). Upholstery arrangement according to one of the preceding claims,
characterized,
that the membrane (3) has a continuously arranged at the edge Einhängstruktur (6) and the carrier frame (2) corresponding hooking means (7) to which the membrane (3) is received by means of the Einhängstruktur (6). Upholstery arrangement according to claim 3,
characterized,
that the Einhängstruktur (6) is formed with a hole bar or an Lochkeder (8). Upholstery arrangement according to one of the preceding claims,
characterized,
that the membrane (3) has a thermoschrumpfbares net or web (9) and a bias voltage applied by heating in all expansion directions of the network or fabric (9). Upholstery arrangement according to one of the preceding claims,
characterized,
in that a filling foam (18) and / or back foam (17) is applied to the membrane (3) on the side facing away from the cushion body (4). Method for producing a cushion arrangement (1), in particular a cushion arrangement according to one of the preceding claims, comprising the steps: Providing a support frame (2), a thermally shrinkable mesh or fabric (9), a cushion body (4) and a cover (5); Attaching the net or fabric (9) to the support frame (2); Applying a bias to the mesh or fabric (9) by heating; Applying the cushion body loosely to the net or fabric (9); Spanning the cushion body (4) with the cover (5); and Attaching the cover (5) to the support frame (2). Method according to claim 7,
characterized,
that attaching the net or fabric to the support frame involves hanging one at an edge of the net or Tissue (9) provided Einhängstruktur (6) in provided on the support frame hanger (7). Method according to claim 8,
characterized,
in that attaching the net or fabric (9) to the support frame (2) is preceded by a step of attaching a perforated strip (8) or a perforated welt as a suspension structure (6) to the net or fabric (9). Method according to one of claims 6 to 9,
characterized,
the mesh or fabric (9) comprises a vulcanizable polymer, wherein the heating causes vulcanization of the polymer and shrinks the mesh or fabric (9). Method according to claim 10,
characterized,
that the heating in an oven at a curing temperature of the polymer for a short time, in particular 10 to 300 seconds, preferably 30 to 120 seconds, particularly preferably 45 to 75 seconds is made. Method according to one of claims 10 or 11,
characterized,
that the fixing of the net or web (9) to the support frame (2) is made circumferential and the shrinkage of the net or web (9) in all directions of extension, in particular by more than 10%, preferably from 15% to 18%, carried out , Method according to one of claims 6 to 12,
characterized,
that the application of the cushion body (4) loosely on the grid or fabric (9) comprises a local fixing of the cushion body (4) on the support frame (2). Chair (10), in particular office or conference chair, having a backrest (11) with a cushion arrangement (1) according to one of claims 1 to 6 and / or produced by a method according to one of claims 7 to 12. Chair according to claim 14,
characterized,
that the support frame (2) is formed as a backrest frame and the backrest (11) at least predominantly comprises a local thickness less than 3 cm.

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