EP2893840B1 - Chair with sled-base frame - Google Patents

Description

The invention relates to a chair having the features of the preamble of claim 1.

Such a chair is known from practice, for example in the form of a cantilever and comprises a support frame, which is designed as a so-called skid frame and in which therefore a seating area on both sides relative to a vertical chair longitudinal center plane arranged on both sides, vertical chair legs extending in the chair longitudinal direction, both sides arranged runner-like struts is supported, which rest on the ground. The runners and the adjoining chair legs can be made of a tubular element that continues in a lateral boundary of a seat portion and a backrest portion.

Furthermore, it is known to provide a chair with a tensioning net, which is clamped on a corresponding support frame and forms a seat element and a backrest element of the chair (see, eg US3844612A ; CN2568049Y or US370714B ).

The invention has for its object to provide a chair of the aforementioned type, in which a simple connection of a foldable sheet material to form a seat portion and / or a backrest portion is realized.

This object is achieved by the chair with the features of claim 1.

The essence of the invention is therefore to bend in a runner designed as a support frame tube elements so that they follow a seat and a backrest surface of the chair and at the same time each form a chair leg and a runner of the skid frame. At the same time, the tube element, which is formed continuously, in the area extending along the seat portion and the backrest portion, slotted in the axial direction, respectively. Edge-side piping of the sheet material is inserted into the resulting slots, so that the sheet material is stretched between the tubular elements arranged on both sides and forms the seat section and / or the backrest section. The fixation of the foldable sheet material is thus without further components directly to the tubular elements, which also form the runners of the skid frame. In particular, the support frame represents a cantilever frame on which, for example, the slots for mounting the sheet material are formed by laser cuts.

The both sides arranged skids of the tubular elements, which may in particular have a rectangular cross-section, are connected to each other in an expedient embodiment of the chair according to the invention via a frontally arranged traverse. The traverse is preferably arranged on the back of the chair.

In order to be able to impart the required tension to the foldable sheet material, a stiffening frame is preferably provided, which is arranged between the tubular elements arranged on both sides. The stiffening frame extends in particular over the backrest portion of the chair and defines the distance of the tubular elements in chair transverse direction.

In order to realize a visually pleasing upper end of the backrest, end pieces are provided according to the invention, which are inserted into the tubular elements at their upper ends. At the end pieces, the sheet material is turned back down, whereby no cutting edge of the sheet material is visible. For example, the sheet material may be jammed at the end pieces arranged on both sides. Conveniently, the tail is then formed in two parts.

In principle, the piping can have any shape which prevents slippage of the sheet material through the slots of the tubular elements or release of the sheet material from the tubular elements. In a preferred embodiment of the chair according to the invention, however, the piping is formed from a profile body having an axially extending receptacle in which the respective Fixed edge of the sheet material, in particular sewn. For example, the receptacle is located between two legs of a profile body which is essentially U-shaped in cross-section.

In order to prevent the sheet from being damaged by sharp edges at the edges of the slots, the welt preferably overlaps an edge of the slot, for example with a tab which exits the tubular member via the slot.

The piping can be given a defined orientation within the tube in the tensioned state of the sheet material, if it has a stop which cooperates with the other edge of the slot.

Further advantages and advantageous embodiments of the subject matter of the invention are the description, the drawings and the claims removable.

Figur 1

eine perspektivische Frontansicht eines Stuhls nach der Erfindung;

Figur 2

eine perspektivische Rückansicht des Stuhls nach Figur 1;

Figur 2A

eine Explosionsdarstellung des Stuhls;

Figur 3

einen Sitzabschnitt des Stuhls im Bereich einer Anbindung an ein Trägergestell des Stuhls;

Figur 4

einen oberen Endbereich einer Rückenlehen des Stuhls;

Figur 5

ein Rohrelement des Trägergestells in einer Draufsicht;

Figur 6

einen Querschnitt des Rohrelements zusammen mit einem Keder;

Figur 7

eine Draufsicht auf den Keder im unmontierten Zustand;

Figur 8

einen Querschnitt des Keders;

Figur 9

ein oberes Endstück des Trägergestells in Alleinstellung; und

Figur 9A

eine Explosionsdarstellung des Endstücks.

A chair according to the invention is shown schematically simplified in the drawing and will be explained in more detail in the following description. It shows:

FIG. 1

a front perspective view of a chair according to the invention;

FIG. 2

a perspective rear view of the chair FIG. 1 ;

FIG. 2A

an exploded view of the chair;

FIG. 3

a seat portion of the chair in the region of a connection to a support frame of the chair;

FIG. 4

an upper end portion of a backrest of the chair;

FIG. 5

a tubular element of the support frame in a plan view;

FIG. 6

a cross section of the tubular element together with a piping;

FIG. 7

a plan view of the piping in the unmounted state;

FIG. 8

a cross section of the welt;

FIG. 9

an upper end of the support frame in isolation; and

Figure 9A

an exploded view of the tail.

In the drawing, designed as a cantilever Chair 10 is shown, which comprises a designed as a runner frame support frame 12, which has a standing in plan view U-shaped stand section. The support frame 12 is formed of two parallel tube elements 14A and 14B, which are arranged on both sides of a vertical chair longitudinal center plane and are connected to one another at their rear ends or front sides via a cross member 15 of the stand section. The two tubular elements 14A and 14B each form a resting on a standing surface runner, which is part of the U-shaped stand section and merges forward over a curved portion in a chair leg arranged at the front, which at its upper end in a vertical, a seat portion 16 laterally delimiting Passes section, which is guided to the rear and there over another arc in a backrest portion 18 laterally bounding, upwardly facing section passes. The two tube elements 14A and 14B are each formed in one piece.

In order to fix a tensioning net 20, which thus constitutes a foldable sheet material and which forms the seat portion 16 and the backrest portion 18, the two tubular members 14A and 14B along the backrest portion 18 and the seat portion 16 are each provided with a slot 24 preferably made by a laser process. in the axial direction of the respective pipe element 14A and 14B runs. The slots 24 are each penetrated by the tensioning net 20, which is provided on both sides in each case with a piping 28 which is disposed within the respective tubular element 14A and 14B.

In order to provide the tensioning net 20 with the required tension between the two tubular elements 14A and 14B, a clamping frame or stiffening frame 22 is provided, which is arranged in the region of the backrest between the two tubular elements 14A and 14B and determines their spacing. In addition, a traverse 21 is clamped between the tubular elements 14A and 14B in a front knee area.

At their upper ends, the tube elements 14A and 14B are each provided with an in FIG. 9 provided in isolation end piece 26 which is inserted into the free cross section of the respective pipe member 14A and 14B. The end pieces 26 each consist of a slide-in body 38, which is inserted into the respective tubular element 14A or 14B, and a shell 40, which is fixed by a screw 42 on the insertion body 38. In particular FIG. 4 it can be seen, the tensioning net 20 is folded at the end pieces 26 to the rear bottom, so that no visible cutting edge of the tensioning network 20 is present at the top of the backrest.

The piping 28 introduced on both sides into the tubular elements 14A and 14B are, in particular, the FIGS. 6 and 8th it can be seen in cross-section in each case in the broadest sense U-shaped, between the two legs, a receptacle 32 is formed for the respective edge of the tensioning network 20, which is sewn with two legs over two seams. At their base, the two legs of the profile body 30 are connected to each other via a film hinge-like, with respect to material thickness tapered region. The piping 28 are made of a rubber-elastic material.

The clamping web 20 and the seat portion 16 and the backrest portion 18 facing leg of the profile body 30 has a tab 34 which is guided through the slot 24 of the respective pipe member 14 A and 14 B and engages over a slot 24 delimiting edge. Due to the tension of the tensioning network 20, the tab 34 is folded over, whereby it bears against the outside of the respective tubular element 14A or 14B. At its second leg, the profile body 30 of the Keders 28 a buffer-like stopper 36 which cooperates with the second edge of the slot 24 of the respective tube member 14 A and 14 B, respectively.

In the Figures 10 and 11 an alternative embodiment of a chair 10 'according to the invention is shown, extending from the chair to the FIGS. 1 to 9A characterized in that the stiffening frame 22 'in the region of the seat portion 16 and not in the region of the backrest portion between the tubular elements 14A and 14B is arranged. The stiffening frame 22 'is thus hardly visible to a viewer, resulting in a high visual appearance.

Furthermore, the chair 10 'has an upper transverse strut 44, which extends in the region of the upper edge of the backrest portion 18 between the two tubular elements 14A and 14B.

Incidentally, the chair 10 'corresponds to the chair after FIGS. 1 to 9A ,

LIST OF REFERENCE NUMBERS

10, 10 '

chair

12

support frame

14A, 14B

tube element

15

traverse

16

seat section

18

Backrest portion

20

Webbing

21

traverse

22, 22 '

stiffening frame

24

slot

26

tail

28

piping

30

profile body

32

admission

34

flap

36

attack

38

plug-in unit

40

Bowl

42

screw

44

crossmember

Claims (8)

1. A chair comprising a support frame (12) configured as a skid-base frame and including a pipe structure which, with respect to a vertical chair longitudinal central plane, has a pipe element (14A, 14B) each on both sides which forms a lateral boundary of a seatsection (16) and a back rest section (18), where the pipe elements (14A, 14B) respectivelyextend continuously with an axially extending slot (24) running along the seat section (16) and the back rest section (18), into which a foldable surface material (20) with a welt (28) arranged on the edges has been inserted, wherein the seat section (16) and the back rest section (18) are formed from the surface material,characterised in that the pipe elements (14A, 14B) have an end piece (26) pushed into them at their upper ends, at which the surface material (20) is folded over downwards towards the back.
2. The chair according to claim 1, characterised in that the end piece (26) is formed in two parts and in that the surface material (20) is clamped between the two parts of the end piece (26).
3. The chair according to one or more of the preceding claims, characterised in that the pipe elements (14A, 14B) are each rectangular in cross-section.
4. The chair according to one or more of the preceding claims, characterised in that the skids arranged on both sides of the pipe elements (14A, 14B) are connected with each other via a cross-member (15).
5. The chair according to one or more of the preceding claims, characterised by a stiffening frame (22, 22'), which is arranged between the pipe elements (14A, 14B) on either side.
6. The chair according to one or more of the preceding claims, characterised in that the welt (28) is formed of a profile body (30) comprising a retainer (32) extending in axial direction, in which the respective edge of the surface material (20) is fixed, in particular by means of sewing.
7. The chair according to one or more of the preceding claims, characterised in that the welt (28) overlaps an edge of the slot (24).
8. The chair according to one or more of the preceding claims, characterised in that the welt (28) comprises a stop (36) which cooperates with anedge of the slot (24).

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