DE102012219227B4 - Frame arrangement of office furniture, office seating - Google Patents

Abstract

Frame arrangement (1) of an office seating furniture (20), in particular a membrane backrest (21), with a covering membrane (9), with a clamping frame (2) having a clamping groove (19), latching means (3) and a stop area (4 ), with a clamping strip (5, 5 ', 5' ''), which has a stop extension (7) and to the locking means (3) corresponding counter-latching means (6), with a Kederelement (8), which in the mounted state in the clamping groove (19) between the clamping frame (2) and clamping strip (5, 5 ', 5' '') is insertable, wherein the covering membrane (9) on the Kederelement (8) is mounted, wherein the Kederelement (8) in mounted state under a bias voltage (V) of the string membrane (9) in the clamping groove (19) between the clamping frame (2) and the terminal block (5) is clamped, whereby a force (F) on the terminal block (5; 5 ' ; 5 '' ') acts, which presses the stopper extension (7) against the stopper area (4).

Description

FIELD OF THE INVENTION

The present invention relates to a frame assembly of an office seating furniture, in particular a membrane backrest, and an office seating furniture with such a frame arrangement.

TECHNICAL BACKGROUND

It is well known to string office seating furniture with a stringing material. Mostly a pad is covered with an outer fabric. A particular embodiment of office seating furniture represent office chairs, which at least in the backrest area have no upholstery, but are covered with a net or a fabric, so called a membrane. This has advantages in particular with regard to the ventilation of the back of a person sitting on the chair, since the air-permeable membrane can reduce sweating and is therefore perceived as pleasant. Further advantages of such chairs are the appealing appearance and the good accessibility of the back of the stringing material, whereby support elements, such as a lumbar support, are easily accessible and thus easily adjustable.

Such backrests require a frame over which the covering material is stretched. The German utility model DE 20 2008 012 924 U1 describes a frame with a frame for a net chair, over which a net is stretched. On the frame, a plurality of mesh-connecting cylinders are arranged projecting, which are adapted to reach through meshes of the net material and thus to attach the net material to the frame. Subsequently, a coating layer is injected, which fixes the compound. In this arrangement, it is not exactly defined beforehand on which meshes of the net fabric the connecting cylinders engage in the net fabric. Furthermore, the mesh is permanently connected to the frame after encapsulation.

Another disadvantage of such frame structures is their massive design, which is due to the construction and the stability. However, such massive frame structures limit the degrees of freedom in the design of backrests, so that the appearance of such backrests is often no longer appealing due to their massive construction.

SUMMARY OF THE INVENTION

Against this background, the present invention seeks to provide an improved frame arrangement for office seating.

According to the invention this object is achieved by a frame assembly with the features of claim 1 or a frame assembly with the features of claim 4 and by an office seating with the features of claim 16.

• – Eine Rahmenanordnung eines Bürositzmöbels, insbesondere eine Membran-Rückenlehne, mit einer Bespann-Membran, mit einem Klemmrahmen, der eine Klemmrille, Rastmittel und einen Anschlagbereich aufweist, mit einer Klemmleiste, die einen Anschlagfortsatz und zu den Rastmitteln korrespondierende Gegenrastmittel aufweist, mit einem Kederelement, welches im montierten Zustand in die Klemmrille zwischen Klemmrahmen und Klemmleiste einführbar ist, wobei die Bespann-Membran an dem Kederelement angebracht oder befestigt ist, wobei das Kederelement im montierten Zustand unter einer Vorspannung der Bespann-Membran in der Klemmrille zwischen dem Klemmrahmen und der Klemmleiste derart eingeklemmt ist, dass eine Kraft und/oder ein Moment auf die Klemmleiste wirkt, welche bzw. welches den Anschlagfortsatz gegen den Anschlagbereich drückt.
• – Eine Rahmenanordnung eines Bürositzmöbels, insbesondere eine Membran-Rückenlehne, mit einer Bespann-Membran, mit einem Klemmrahmen, der Rastmittel und einen Anschlagbereich aufweist, mit einer Klemmleiste, die einen Anschlagfortsatz, einen Befestigungsbereich, und zu den Rastmitteln korrespondierende Gegenrastmittel aufweist, wobei die Bespann-Membran und der Befestigungsbereich derart ausgebildet sind, dass sie, insbesondere stoffschlüssig, miteinander verbindbar sind, wobei die Bespann-Membran über den Befestigungsbereich an der Klemmleiste angebracht oder befestigt ist, wobei die Klemmleiste im montierten Zustand unter einer Vorspannung der Bespann-Membran derart vorgesehen ist, dass eine Kraft und/oder ein Moment auf die Klemmleiste wirkt, welche bzw. welches den Anschlagfortsatz gegen den Anschlagbereich drückt.
• – Ein Bürositzmöbel, mit einem Trägergestell, mit einem am Trägergestell befestigten Sitz, mit einer am Trägergestell oder am Sitz befestigten Rückenlehne, die eine erfindungsgemäße Rahmenanordnung aufweist.

Accordingly, it is provided:

• A frame arrangement of an office seating furniture, in particular a membrane backrest, with a covering membrane, with a clamping frame, which has a clamping groove, latching means and a stop area, with a clamping strip, which has a stop extension and counter locking means corresponding to the latching means, with a Kederelement which in the assembled state is insertable into the clamping groove between clamping frame and clamping strip, wherein the covering membrane is attached or fixed to the Kederelement, wherein the Kederelement in the assembled state under a bias of the covering membrane in the clamping groove between the clamping frame and the terminal block is clamped such that a force and / or moment acts on the terminal block, which or which presses the stopper extension against the stopper area.
• A frame arrangement of an office seat furniture, in particular a membrane backrest, with a covering membrane, with a clamping frame, the locking means and a stop area, with a terminal block, which has a stop extension, a mounting area, and to the locking means counter-locking means, wherein the Covering membrane and the mounting portion are formed such that they are, in particular cohesively, connectable to each other, wherein the string membrane is attached or attached via the mounting portion on the terminal block, wherein the terminal block in the assembled state under a bias of the string membrane such is provided that a force and / or a moment acts on the terminal block, which or which presses the stopper extension against the stop area.
• - An office seating furniture, with a support frame, with a seat attached to the support frame, with a backrest attached to the support frame or seat, which has a frame arrangement according to the invention.

The idea on which the present invention is based is to fasten a covering membrane by means of a clamping strip to a clamping frame in such a way that a biasing force of the covering membrane is supported on a stop provided between the clamping strip and the clamping frame. In this case, the terminal block is locked in such a way with the clamping frame, that on the terminal block constituent moments also on the Support stop. The particular advantage consists in the self-helping design of this frame assembly. The higher the biasing force of the string membrane, the higher automatically the support force for the terminal strip which is supported on the stop. The stopper is designed so that the biasing force does not act releasably on the latching connection of the latching means of the clamping frame and the terminal block. The biasing force largely relies on the stop. Thus, a stable attachment of the covering membrane is ensured, wherein the connection of the locking means of forces which are operationally initiated by a person sitting on the chair, remains virtually unaffected. Thus, a self-retaining construction for the clamping of the string membrane is thus provided.

Furthermore, according to the invention, a frame arrangement is provided which provides a detachable connection of the covering membrane with the clamping frame. Thus, the string membrane can be replaced or removed, for example, for cleaning and reattached.

In addition, can be achieved with the frame assembly according to the invention, which is a very compact design, a much improved appearance of the chair. For example, the frame portions of the chair can be provided very narrow, without sacrificing the clamping security and strength must be taken into account.

In a first embodiment of the invention, a keder element connected or fastened to the covering membrane is clamped in a clamping groove of the clamping frame between the clamping strip and the clamping frame. With the Kederelement a defined section is provided, on which the string membrane is attached. Thus, operator errors are avoided when attaching the string membrane to the clamping frame.

In a second embodiment of the invention, the string membrane is connected to the terminal block, in particular by material connection. Thus, the terminal block itself represents the defined section to which the string membrane, in particular directly and firmly, is attached. Also, operator errors when attaching the string membrane are avoided on the clamping frame.

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.

In one embodiment of the first embodiment, the Kederelement is designed as a flat profile strip, wherein the covering membrane is mounted in the region of a first profile edge on a first flat side of the flat profile. In particular, the Kederelement may comprise a plastic strip to which the covering membrane is sewn and / or glued. Alternatively or additionally, the covering membrane may also be welded to the flat profiled strip or otherwise connected in a form-fitting, cohesive or non-positively connected manner.

In a further preferred embodiment of the first embodiment, the Kederelement is supported in the clamped state with the first profile edge on the clamping frame and supported with a second profile edge of a second flat side of the terminal block. Thus, the biasing force transmitted by the stringing membrane to the Kederelement is supported on the frame assembly or on the clamping frame and the terminal block. In this case, no additional facilities or training need to be provided on the Kederelement. However, additional facilities on Kederelement for supporting the same, such as heels or the like, of course, conceivable. The Kederelement is in the mounted state in the clamping groove of the clamping frame, in which the terminal strip engages at least in sections. Particularly advantageously, the Kederelement is clamped in a state in which the first profile edge to which the string membrane is attached, against the clamping frame by the biasing force and the corresponding deflection of the string membrane via an envelope attachment, is pressed. At the same time, the Kederelement bears with the second profile edge on the terminal strip and forms there a pivot point or pole and / or jammed with a narrow side of the Kederelements in a rounding or recess of the terminal block.

In a preferred embodiment of the second embodiment variant, the covering membrane and the fastening section are designed such that they can be welded together, in particular by means of a laser beam welding method. Thus, a solid, cohesive connection between the covering membrane and the fastening region of the terminal strip is created in a manner that can be automated very easily. The materials of the clamping strip and the covering membrane are preferably thermoplastics that are compatible with one another by welding technology. In the case of using a laser beam welding process, both heat conduction welding processes and deep welding processes can be used.

The embodiments described below represent embodiments of both embodiments.

According to a preferred embodiment, the clamping frame is formed as a supporting structural part of the frame assembly. As a result, an extremely slim frame arrangement is achieved, in particular in the case of a membrane backrest, which opens up new possibilities in the design of the membrane backrest. The designer thus has the advantageous opportunity to make the appearance of the frame arrangement very filigree, which allows a particularly elegant appearance and appearance. Furthermore, the fact that the clamping frame simultaneously represents the supporting structural part of the frame assembly reduces the number of parts used and provides functional integration. Thus, the total manufacturing cost of the frame assembly can be reduced because fewer parts must be manufactured, handled and assembled.

According to an advantageous embodiment, the clamping frame contains a multidirectional fiber composite material. Such a material has a particularly high strength, whereby the dimensioning of the clamping frame can be significantly reduced and thus an advantageous narrow or filigree optics of the clamping frame can be achieved. Furthermore, the haptic appearance of such a multidirectional fiber composite material and the optics are appealing. Furthermore, such a multidirectional fiber composite material, in particular when it comes to fiber fabrics, can be produced very easily automatically, which lowers the production costs in comparison to manual production, particularly in the case of high quantities. As an alternative to the fiber composite material, the clamping frame can also be formed as a metal part, for example in the form of an aluminum profile, in particular an extruded aluminum profile. Furthermore, a solid wood material or a wood composite material or a different kind of composite material for the clamping frame in question.

In a further embodiment, the clamping frame of the frame arrangement is formed as a profile with curve regions which runs around with a substantially constant cross-sectional contour. Under a substantially constant cross-sectional contour is a contour to understand, which can change slightly due to changes in direction of the profile. For example, a radius compensation must be created in a curve region of such a profile, which can lead to slight deviations of the cross-sectional contour in the curve areas. Furthermore, the essentially constant cross-sectional contour also encompasses fastening elements or devices which can deviate the cross-sectional contour in this section from the other cross-sectional contour of the profile. Thus, the entire clamping frame can in particular be formed in one piece, which in turn greatly reduces the number of parts. Advantageously, a particularly easy-to-install solution for attaching the covering material can thus be realized in the curve area. This is usually problematic when stringing office seating furniture because a covering material in the area of corners slightly curls or wrinkles. With the present invention can be provided with the prefabricated attached to the covering material Kederelement optimally designed with its mechanical stress conditions covering material, so that the final assembly of attaching the covering membrane by clamping the Kederelements between clamping frame and terminal block with the prefabricated covering material is easy to make. For this purpose, markings are advantageously attached to the piping element and / or the clamping frame and / or the clamping strip, which mark the intended arrangement of the piping element.

In one embodiment, the latching means comprises a spring with a latching projection. The counter-locking means comprises a corresponding groove with a corresponding to the locking projection undercut in the region of the groove bottom of a locking bar. Thus, a frictional and / or positive connection is made available by simple means, which allows a circumferential locking of the terminal block with the clamping frame and also is easy to manufacture. In addition, in this embodiment, the terminal block by means of the locking bar in addition to receiving moments particularly advantageous supported on the clamping frame, in particular on a wall of the clamping groove. This has an additional self-healing effect, because if the locking strip yields due to the moment and the support of the wall of the clamping groove, the latching force of the locking means is advantageously increased. Thus, high operating forces, which lead to high biasing forces of the string membrane, at the same time also increase the latching forces of the latching connection, so that the latching connection is thereby reinforced.

In a particularly preferred embodiment, the pole around which the torque is applied is provided in the region of the undercut of the groove. Thus, the region of the undercut is almost free of forces caused by the moment, whereby the holding force of the clamping strip (as a reaction force on the biasing force) is supported on the stopper area and not on the locking means or the spring of the clamping frame. This will ensure that the connection between Terminal block and clamping frame is not affected by operating forces, ie by tension or bias of the membrane membrane.

In a further preferred embodiment, the terminal strip on a Umschlagvorsprung on which the covering membrane is folded. Thus, a defined and visually appealing envelope of the string membrane is provided.

In advantageous embodiments, the terminal strip additionally in the region of the Umschlagvorsprungs an oriented in the direction of the clamping frame projection nose, which forms an undercut together with the locking bar. Advantageously, in the first embodiment variant, the keder element can be supported on this undercut and thus secured. In the second embodiment, the attachment area can also be located on the projection nose. This is advantageous because there is sufficient material as meat on the projection nose to pull it, for example, a laser beam weld or to provide a different type of weld or gluing or other attachment.

In one embodiment, the covering membrane folded over at the envelope projection is particularly advantageously provided in such a way that it forms the visible closure of a region of the chair covered with the covering membrane in the assembled state and that the welt element is covered by the covering membrane in the mounted state. Thus, a visually appealing frame assembly is provided in which from the outside, only the outer surface of the clamping frame and the surface of the covering membrane are visible.

In a further preferred embodiment, the covering membrane contains a self-supporting tissue. Furthermore, in one embodiment, it is optionally or additionally provided visibly on both sides in the mounted state. For example, the covering membrane may comprise a multilayer membrane, wherein on the two outer sides of the membrane, a visual superstructure is provided and in the middle of a supporting and / or cushioning structure is provided. Alternatively, the covering membrane can also be designed as a net, the net itself already representing the supporting structure and at the same time the double-sided surface of the covering membrane. Furthermore, any type of other fabric can serve as a covering membrane, which can accommodate the mechanical stress of a person sitting on the chair and meets the other requirements for a chair, especially in terms of appearance and robustness.

In a further preferred embodiment, the stop area has two stop surfaces, which are arranged at an angle to each other. Thus, forces can be absorbed in different directions to the stop area. In particular, the holding force applied directly to the clamping strip by the pretensioning force can thus be directly supported in the direction of the pretensioning force on the clamping frame. Furthermore, the force resulting from the moment around the pole of the rotary strip can be supported separately or combined on a further surface of the stop area. This contributes to the fact that of the biasing force or the operating forces, which are introduced from the stringing membrane in the frame assembly, no influence on the locking means emanates.

In an advantageous embodiment of an office chair furniture, the entire covering membrane is provided in one piece and provided by releasing the locking and counter-locking means integrally removable and / or interchangeable. Thus, the string membrane can be removed, for example, for cleaning and replaced or replaced.

In an advantageous embodiment of an office seating furniture this is equipped with a membrane backrest. In particular, this makes it possible to specify a design which is particularly light-weighted and therefore very appealing.

The above embodiments and developments can, if appropriate, combine with each other as desired. 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

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:

1 an office seating furniture of a membrane backrest, which comprises a frame arrangement according to the invention;

2 a cross-sectional view of a frame assembly according to the invention in a first embodiment of a first embodiment;

3 the frame assembly of the invention 2 with marked forces and moments;

4 a cross-sectional view of the terminal block 2

5 a cross-sectional view of the clamping frame 2 ;

6 a cross-sectional view of a string membrane and a Kederelements from 2 ;

7 a second embodiment of the first embodiment of the invention with a projection nose on the terminal block;

8th a terminal block of a frame assembly according to the second embodiment of the present invention;

9 a cross-sectional view of a third embodiment of the first embodiment of the invention;

10 a perspective cross-sectional view of the embodiment 9 in an exploded view.

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

In 1 is an office seating furniture 20 represented in the form of an office swivel chair, which has a membrane backrest 21 having. The membrane backrest 21 comprises a frame arrangement according to the invention 1 which a string membrane 9 contains. The string membrane 9 is in one piece over the entire frame arrangement 1 curious; excited. The frame arrangement 1 has curve areas 22 in which the profile of the frame assembly has a curvature and is curved at an angle of about 90 ° ± 20 °. There are several curve areas 22 on the frame assembly 1 provided as in 1 recognizable.

The membrane backrest 21 indicates in addition to the frame arrangement 1 also a lumbar support 23 on which advantageous on a membrane backrest easily accessible from the back of the membrane backrest and thus easily adjustable. The membrane backrest 21 is on a support frame 24 attached, which with a chair base 26 connected is. There is also a seat 25 with the chair base 26 connected, bringing the office seating 20 or the office swivel chair is completed.

In 2 is a cross-sectional view of a frame assembly according to the invention 1 shown. The frame arrangement according to the invention 1 contains a clamping frame 2 , a terminal block 5 and a string membrane 9 , which with a Kederelement 8th connected is.

The clamping frame 2 has a clamping groove 19 and contains a stop area 4 , In addition, on the clamping frame 2 latching means 3 in the form of a nose with a latching process 10 intended.

The terminal block 5 has a stopper extension 7 on which at the stop area 4 pending. Furthermore, the terminal block includes a groove 6 , which in the groove bottom an undercut 11 that has the shape of the projection 10 corresponds so that they are releasably locked together. The groove base with undercut immediately forms the foot of a locking bar 31 into which the undercut 11 is introduced.

In 2 are the locking and counter-locking means 3 . 6 shown formed with a sloping paragraph. The string membrane 9 is with the Kederelement 8th in the area of the clamping groove 19 between the clamping frame 2 and the locking bar 31 the terminal block 5 trapped. The string membrane 9 runs from the Kederelement 8th via an envelope projection 12 turned over over the top of the terminal block 5 and then enters a covered area of the frame assembly 1 over which of the envelope projection 12 turned away. The string membrane 9 Advantageously, it is a multilayered membrane having a viewing surface on both sides and a structural layer therebetween. The visual surface materials are optically particularly attractive and advantageously have dirt-repellent properties. For example, the layer in the middle may be resilient and / or include or constitute a reinforcing layer, which may also serve to transmit the forces of the biasing forces. The Preload forces can optionally or additionally be transferred from the outer fabrics.

The terminal block 5 is preferably formed as a molded plastic profile. Alternatively, the plastic profile may also be formed as an extrusion profile. The clamping frame 2 is preferably formed as a fiber composite profile containing a multidirectional fiber composite material. For example, the clamping frame 2 a fiber layer which is oriented in different directions and is provided in particular at the edge with a different direction compared to the fiber directions within the profile. This fiber layer can then be impregnated with a resin and cured, so that a fiber composite material is produced from it. Plastic fibers of a solid type of plastic and / or synthetic fibers of a particularly filling and easily bendable type of plastic can advantageously be used for this purpose. The matrix of the fiber composite material may, for example, comprise a thermoset matrix or a thermoplastic matrix which has properties matching the fibers, ie either particularly high strength or high flexibility. Thus, especially delamination is avoided. In this case, solid fibers and a solid matrix are preferably used in order to realize maximum strength and thus as filigree as possible a dimensioning of the frame parts.

3 schematically shows the forces acting on the individual components forces F, V or moments M. On the string membrane 9 The biasing force V, which is representative of all on the string membrane acts 9 acting forces is shown and includes, for example, operating forces, which are caused by a person sitting on the office seating. These biasing forces V are in response to the forces F and M moments on the terminal block 5 transfer. You terminal strip 5 essentially supports the moments M and forces F at the stop area 4 of the clamping frame 2 from. This is the stop area 4 advantageous with two stop surfaces 17 . 18 provided so that forces in different degrees of freedom or directions at the stop area 4 can be included. Low shares of forces and / or moments can also from the locking and counter-locking means 3 . 6 be recorded. In addition, also the locking bar 31 the terminal block 5 Support moments with them by placing them on the wall of the clamping groove 19 is applied. This has a self-helping effect, because if the locking bar 31 due to the moment and the support of it on the wall of the clamping groove 19 yields, thereby the cogging force of the locking means is increased.
4 shows a cross-sectional view of a terminal block 5 , The terminal block has a groove 6 on which an undercut 11 contains. Further, on the terminal block 5 an envelope projection 12 provided to which the string membrane 9 is handled. The functionality of the groove 6 and the envelope projection 12 has already been comprehensive in terms of 2 described.

5 shows a clamping frame 2 who has a nose 3 having a latching projection 10 contains. Furthermore, the clamping frame 2 a clamping groove 19 on, in which parts of the terminal block 5 and the Kederelement 8th introduced and jammed together. In addition, a second groove is provided, which further parts of the terminal block 5 absorbs what to ensure the locking characteristics of the locking means 3 . 6 necessary is. Furthermore, the clamping frame 2 a stopper section 4 on which two mutually angled stop surfaces 17 and 18 having.

6 shows the string membrane 9 with the Kederelement 8th , The keder element 8th has two flat sides 15 and 16 on, being on a first flat side 15 the covering membrane on one edge 13 is attached. At this edge 13 supports the Kederelement 8th in the assembled state on the clamping frame 2 from. Furthermore, the Kederelement has a second flat side 16 on, to which one of the edge 13 opposite, further edge 14 is provided, which is supported in the assembled state on the terminal block. Alternatively or additionally, the Kederelement can also with the edge 14 subsequent narrow side of the Kederelements 8th to be supported on the terminal strip. Furthermore, additional support means, such as a paragraph, may be provided, which are supported on corresponding support means of the clamping frame or the terminal block.

In 7 is a second embodiment of the first embodiment of the invention with a projection nose 12 ' at the terminal block 5 ' shown. Apart from the projection nose 12 ' In this embodiment, all functional elements of the first embodiment are represented. The projection nose 12 ' is as a thickening of the Umschlagvorsprunges 12 shown. The projection nose 12 ' forms at the the clamping frame 2 facing bottom of the terminal block 5 ' an undercut from. In this undercut, the Kederelement supports 8th with a narrow side and / or with one or two profile edges. In addition, the projection nose also serves to secure the Kederelements 8th in the clamping groove 19 , because the opening between terminal strip 5 ' and clamping frame 2 gets through the projection nose 12 ' reduced.

8th shows a terminal block 5 '' a frame arrangement 1 according to the second embodiment of the present invention. In the second embodiment are apart from the Connection between terminal strip 5 '' and covering membrane 9 '' and the absence of a Kederelements 8th all other functional elements described above with respect to the first embodiment are also present. To avoid repetition, at this point, therefore, only the differences from the first embodiment will be discussed, which refers to the formation of the terminal block 5 '' and the string membrane 9 '' focus. Therefore, for clarity in 8th the clamping frame 2 not shown.

The terminal block 5 '' has a mounting area in the illustrated embodiment 30 on which at the locking bar 31 the terminal block 5 '' is arranged. In alternative embodiments, the attachment area 30 also at another location, for example at a projection nose, not shown 12 ' be provided.

The string membrane 9 '' is in the illustrated embodiment with the locking bar 5 '' welded trained. It is particularly advantageous by means of a laser beam welding process to the locking bar 5 '' welded provided. In this case, single or double or multiple welds can be provided. Furthermore, other welding patterns may be provided, adapted to the strength of a single weld. The weld can be realized by means of heat conduction welding or by deep welding, in plastics advantageously by means of a diode laser. Laser beam welding processes are generally known to the person skilled in the art, which is why it will not be discussed further here.

So that the string membrane 9 '' and the terminal block 5 '' or the area of the locking bar 31 at the terminal block 5 '' can be welded together, both parts must exist at least at the points to be welded from welding technology compatible materials. For example, the materials include well weldable thermoplastics such as PMMA, polyamide, polyethylene, polypropylene, polycarbonate or polystyrene.

In the present embodiment, the string membrane 9 '' in addition to the integral fastening also between the terminal strip 5 '' and the clamping frame, not shown 2 be trapped, especially in the region of the clamping groove 19 of the clamping frame 2 ,

9 shows a cross-sectional view of a third embodiment of the first embodiment of the invention. In this embodiment, the latching extension 10 the nose 3 in contrast to the above embodiments, not in the direction of the Kederelements 8th but in the direction of the stop area 4 , With this training thus takes place a change in power support. The entire design is provided such that there is no or only a slight moment about the locking means. Instead, here is the on the membrane membrane 9 applied biasing force V mainly as a reaction force F on a support surface 17 of the stopper extension 7 supported. This is preferably aligned perpendicular to the biasing force V. At the second, angled stop surface 18 Consequently, there are no or only small forces here.

Furthermore, the terminal block is also 5 ''' formed adapted to the different power support. According to the arrangement of the latching extension, the counter-locking means 6 on the side of the stopper extension 7 intended. The keder element 8th is in the clamping groove 19 clamped provided. It adapted in terms of its training so that it is mainly on the turn-tab 12 the terminal block 5 ''' supported.

10 shows a perspective cross-sectional view of the embodiment 9 in an exploded view. Here is a frame assembly with curve sections 22 shown to which the string membrane 9 by means of the terminal strip 5 ''' is tense. The terminal block 5 ''' is circumferential around the curve area 22 Seating in the clamping frame. At the terminal block 5 ''' are material-saving recesses 32 intended. The reaction forces are at portions between the recesses 32 transfer.

The locking means 3 are as a variety of individual noses 3 intended. This is owed to the changed force support and design, because for locking the counter-locking means 6 especially the noses deform here 3 flexible. This has the background that the noses 3 hardly absorb operating forces and therefore possibly in the area of the stop section 4 on the back kraftabstützenden Gegenrastmittel 6 are formed solid.

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.

The clamping frame can contain a variety of materials. For example, it may also be provided from a metal material such as aluminum, or be formed with a steel material. Furthermore, clamping frames made of wood are conceivable or from a pure plastic material.

As office seating furniture, although described herein only with reference to an office swivel chair, is meant all office seating furniture, for example, conference chairs, chairs with and without back legs (so-called cantilever chairs) or the like. Furthermore, the frame assembly according to the invention can also be used for other sitting or lying furniture, such as sofas, sun beds, camp beds, dining chairs, couches.

As an alternative to a laser beam welding process, an adhesive bond can also be produced for the cohesive connection of the covering membrane with the terminal strip, or else a fusion welding process or a soldering process can be used. As an alternative to the cohesive connection, other types of solid connections are also conceivable. For example, the covering membrane can also be sewn to the terminal strip.

LIST OF REFERENCE NUMBERS

1

frame assembly

2

clamping frame

3

Locking means, nose

4

stop area

5, 5 ', 5' ', 5' ''

terminal block

6

Counter latch, groove

7

Stop extension

8th

Kederelement

9, 9 ''

Hangings membrane

10

Latching extension

11

undercut

12

Cover edge

12 '

lead nose

13

edge

14

edge

15

first page

16

second page

17

stop surface

18

stop surface

19

clamping groove

20

Bürositzmöbel

21

Membrane backrest

22

curve area

23

lumbar support

24

support frame

25

seat

26

seat base

30

fastening area

31

locking strip

32

recesses

Claims (20)

Frame arrangement ( 1 ) of office furniture ( 20 ), in particular membrane backrest ( 21 ), with a string membrane ( 9 ), with a clamping frame ( 2 ), which has a clamping groove ( 19 ), Locking means ( 3 ) and a stop area ( 4 ), with a terminal strip ( 5 ; 5 '; 5 ''' ), which has a stopper extension ( 7 ) and to the locking means ( 3 ) corresponding counter-locking means ( 6 ), with a Kederelement ( 8th ), which in the assembled state in the clamping groove ( 19 ) between clamping frames ( 2 ) and terminal strip ( 5 ; 5 '; 5 ''' ) is insertable, wherein the string membrane ( 9 ) on the Kederelement ( 8th ), wherein the Kederelement ( 8th ) in the mounted state under a bias voltage (V) of the string membrane ( 9 ) in the clamping groove ( 19 ) between the clamping frame ( 2 ) and the terminal strip ( 5 ) is clamped, whereby a force (F) on the terminal strip ( 5 ; 5 '; 5 ''' ), which the stopper extension ( 7 ) against the stop area ( 4 ) presses. Frame arrangement according to claim 1, characterized in that by the bias voltage (V) a moment (M) on the terminal strip ( 5 ; 5 '; 5 ''' ), which the stopper extension ( 7 ) against the stop area ( 4 ) presses. Frame arrangement according to claim 1 or 2, characterized in that the Kederelement ( 8th ) as a flat profile strip ( 8th ), wherein the string membrane ( 9 ) in the region of a first profile edge ( 13 ) on a first flat side ( 15 ) of the flat profile is attached. Frame arrangement according to claim 3, characterized in that the Kederelement ( 8th ) in the clamped state with the first profile edge ( 13 ) on the clamping frame ( 2 ) and with a second profile edge ( 14 ) a second flat side ( 16 ) on the terminal strip ( 5 ; 5 ' ) is supported. Frame arrangement ( 1 ) of office furniture ( 20 ), in particular membrane backrest ( 21 ), with a string membrane ( 9 '' ), with a clamping frame ( 2 ), the locking means ( 3 ) and a stop area ( 4 ), with a terminal strip ( 5 '' ), which has a stopper extension ( 7 ), a mounting area ( 30 ), and to the locking means ( 3 ) corresponding counter-locking means ( 6 ), wherein the string membrane ( 9 '' ) and the attachment area ( 30 ) are connectable to each other, wherein the string membrane ( 9 '' ) over the mounting area on the terminal block ( 5 '' ) is attached, wherein the terminal block ( 5 '' ) in the mounted state under a bias voltage (V) of the string membrane ( 9 '' ), whereby a force (F) on the terminal strip ( 5 '' ), which the stopper extension ( 7 ) against the stop area ( 4 ) presses. Frame arrangement according to claim 5, characterized in that by the bias voltage (V) a moment (M) on the terminal strip ( 5 ; 5 '; 5 ''' ), which the stopper extension ( 7 ) against the stop area ( 4 ) presses. Frame arrangement according to claim 5 or 6, characterized in that the covering membrane ( 9 '' ) and the attachment section ( 30 ) are welded together, in particular by means of a laser beam welding process. Frame arrangement according to one of the preceding claims, characterized in that the clamping frame ( 2 ) as a structural part of the framework ( 1 ) is trained. Frame arrangement according to one of the preceding claims, characterized in that the clamping frame ( 2 ) contains a multidirectional fiber composite material. Frame arrangement according to one of the preceding claims, characterized in that the clamping frame ( 2 ) of the framework ( 1 ) as a substantially constant cross-sectional contour profile with curved areas ( 22 ) is formed. Frame arrangement according to one of the preceding claims, characterized in that the latching means ( 3 ) a feather ( 3 ) with a latching projection ( 10 ) and the counter-locking means ( 6 ) a groove ( 6 ) with a latching projection ( 10 ) corresponding undercut ( 11 ) in the region of the groove bottom of a locking strip ( 31 ) and that the latching and counter-latching means ( 3 ; 6 ) are releasably locked together in particular. Frame arrangement according to one of the preceding claims, characterized in that the pole (P), around which the moment (M) is applied, in the region of the undercut ( 11 ) is provided. Frame arrangement according to one of the preceding claims, characterized in that the terminal strip ( 5 ; 5 '; 5 ''; 5 ''' ) an envelope projection ( 12 ) around which the string membrane ( 9 ; 9 '' ). Frame arrangement according to claim 13, characterized in that the clamping strip in the region of the Umschlagvorsprungs ( 12 ) one in the direction of the clamping frame ( 2 ) oriented projection nose ( 12 ' ), which together with the locking strip ( 5 ; 5 '; 5 ''; 5 ''' ) forms an undercut. Frame arrangement according to one of the preceding claims, characterized in that the at the Umschlagvorsprung ( 12 ) Covered membrane membrane ( 9 ; 9 '' ) in the assembled state, the visible completion of one with the string membrane ( 9 ; 9 '' ) covered area of the chair and that the Kederelement or the mounting area ( 31 ) in the assembled state of the string membrane ( 9 ; 9 '' ) is covered. Frame arrangement according to one of the preceding claims, characterized in that the covering membrane ( 9 ; 9 '' ) contains a self-supporting tissue and is provided visible on both sides in the assembled state. Frame arrangement according to one of the preceding claims, characterized in that the abutment region has two abutment surfaces ( 17 . 18 ), which are arranged angled to each other. Office seating furniture ( 20 ), with a support frame ( 24 ), with a on the support frame ( 24 ) fixed seat ( 25 ), with a on the support frame ( 24 ) or at the seat ( 25 ) fixed backrest ( 21 ) containing a framework ( 1 ) according to one of the preceding claims. Office seating furniture according to claim 18, characterized in that the entire covering membrane ( 9 ; 9 '' ) is provided in one piece and by releasing the latching and counter-latching means ( 3 ; 6 ) is provided in one piece removable and / or interchangeable. Office seating furniture according to claim 18 or 19, characterized in that the office seating furniture with a membrane backrest ( 21 ) Is provided.

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