EP3656252B1 - Chair - Google Patents

Description

The present invention relates to a chair according to the preamble of claim 1.

Chairs, for example, have a seat with a seat shell and a frame to support the seat. To attach the seat shell to the frame, the frame has, for example, on its side facing the seat at least one fastening strut running parallel to the plane of the seat shell. In such a chair construction, it is known to provide the underside of the seat shell facing the frame with a receiving profile for positively receiving at least part of the fastening strut of the frame and to fix the fastening strut in the receiving profile using clamps screwed to the seat shell.

Such a chair construction is, for example, in the DE 10 2016 222 653 A1 disclosed, wherein a connecting section of the leg assembly is received in a receiving recess of the seat assembly and is held therein by a clamping latch, the clamping latch being first placed on the connecting portion, then pushed into a guide recess in the receiving recess and finally fixed therein by screws. DE 20 2010 007 149 U1 discloses an adapter system for a seat device, the seat element of which has a receiving recess for integrating a section of the frame and an adapter element, the seat element and the adapter element being designed to be positively connectable to one another and the adapter element enabling the seat element to be connected to different frames.

It is the object of the invention to create a chair with an improved fastening system of the frame to the seat.

This task is solved by the doctrine of independent claim. Particularly advantageous refinements and developments of the invention are the subject of the dependent claims.

The chair according to the invention has a seat with a seat shell and a frame for supporting the seat, the frame being on its side facing the seat has at least one fastening strut running parallel to the plane of the seat shell and an underside of the seat shell facing the frame has a receiving profile for receiving at least part of the fastening strut of the frame. The chair of the present invention is characterized in that the receiving profile has a fastening section which runs from a peripheral edge of the seat shell parallel to the plane of the seat shell into the interior of the seat shell and has an access opening on the peripheral edge of the seat shell, and a clamping strip for clamping the fastening strut is provided in the fastening section of the receiving profile of the seat shell, which can be inserted into the fastening section from the access opening of the fastening section on the circumferential edge of the seat shell on a side of the fastening strut of the frame facing away from the seat shell in a direction substantially parallel to a longitudinal direction of the fastening section and in an end position of the terminal strip in the fastening section is fixed in a direction perpendicular to the plane of the seat shell. According to the invention, the fastening section of the receiving profile has a first latching element and the terminal strip has a second latching element which engages with the first latching element on the fastening section in the end position of the terminal strip in the fastening section in order to lock the terminal strip in the longitudinal direction of the fastening section.

The chair according to the invention is characterized by a simply constructed fastening system for the frame on the seat, with which one or more fastening struts of the frame can be easily clamped in the receiving profile of the seat shell of the seat. The fastening strut(s) can be clamped by simply pushing the clamping strip(s) from the circumferential edge of the seat shell into the receiving profile and thus advantageously without additional tools (e.g. screwdrivers, etc.) and without additional fastening elements (e.g. screws, etc. ) must be carried out next to the terminal strip.

The receiving profile is preferably designed as at least one depression or groove in the underside of the seat shell, ie is located essentially completely within the thickness of the seat shell. The receiving profile preferably has no additional elements attached or formed on the underside of the seat shell that protrude from the underside.

The fastening strut of the frame is preferably accommodated in a substantially form-fitting manner in the receiving profile of the seat shell. Preferably, the fastening strut of the frame is also clamped in a substantially form-fitting manner by the terminal strip.

The fastening strut is preferably an integral part of the frame. The fastening strut of the frame is preferably designed in the shape of a tube or rod, preferably with a substantially circular cross-sectional shape. The material of the frame and its fastening strut is basically any, preferably selected from metal, plastic and wood. The material of the seat shell is basically any, preferably selected from plastic and wood, preferably made as a plastic blow molded shell. The material of the terminal strip is basically any, preferably metal or plastic.

In one embodiment of the invention, the fastening section of the receiving profile has a first guide element which runs essentially parallel to the longitudinal direction of the fastening section, and the terminal strip has a second guide element which runs essentially parallel to the longitudinal direction of the fastening section and which is connected to the first guide element Fastening section is engaged in the end position of the terminal strip in the fastening section. By interlocking the two guide elements, the terminal strip is easily fixed in the direction perpendicular to the plane of the seat shell in the fastening section of the receiving profile. The first guide element extends either over the entire length, over a partial length or in sections over several partial lengths of the fastening section. The second guide element extends either over the entire length, over a partial length or in sections over several partial lengths of the terminal strip.

Preferably, the second guide element on the terminal strip is in engagement with the first guide element on the fastening section even while the terminal strip is being pushed into the fastening section. In this way, the assembly of the terminal strip can be simplified or supported.

The fastening concept according to the invention for the frame on the seat makes it possible for the fastening strut of the frame and the terminal strip to be embedded in the receiving profile of the seat shell. This means that neither the mounting strut nor the terminal strip protrude noticeably from the underside of the seat shell. This has the advantage that with certain frame shapes, such as chair legs in a C-shape, stacking several chairs on top of each other and/or placing a chair with its seat on a table top (so-called "chairing") is easy and without the risk of damaging the chair lower chair or the table top or the terminal strips are possible. All that needs to be provided for this is a sufficiently large thickness of the seat shell and a sufficiently large depth of the receiving profile in the underside of the seat shell.

In one embodiment of the invention, the terminal strip has a receiving profile on its side facing the seat shell, which runs parallel to the longitudinal direction of the fastening section and positively engages around a peripheral section of the fastening strut.

In a further embodiment of the invention, the terminal strip has an engagement groove on its side facing away from the seat shell, into which an auxiliary element can engage for inserting and locking the terminal strip into the fastening section of the receiving profile. In this way, the assembly of the terminal strip can be simplified or supported. The auxiliary element is, for example, a type of pin or bolt that can be acted upon, for example with a hammer, in order to drive the terminal strip into the fastening section.

In a further embodiment of the invention, several terminal strips are provided for preferably positively clamping the fastening strut in several fastening sections of the receiving profile of the seat shell. In this way, the stability of the attachment of the fastening strut to the seat shell can be increased.

If the frame of the chair has several fastening struts, at least one fastening section in the receiving profile and at least one terminal strip are preferably provided for each of these several fastening struts.

In a further embodiment of the invention, the receiving profile has several different fastening sections for receiving fastening struts from differently designed frames. This means that one embodiment of a seat or a seat shell can be used in combination with different embodiments of frames.

Fig. 1A-D

Perspektivansichten von Stühlen gemäß der vorliegenden Erfindung, die mit verschiedenen Gestellen ausgestattet sind;

Fig. 2

eine Unteransicht einer Sitzschale eines Stuhls gemäß einem Ausführungsbeispiel der Erfindung;

Fig. 3A-D

Unteransichten der Sitzschale gemäß Fig. 2 mit den Befestigungsstreben verschiedener Gestelle gemäß den Figuren 1A bis D;

Fig. 4A-D

mehrere Teilperspektivansichten eines Befestigungssystems einer Befestigungsstrebe des Gestells an der Sitzschale gemäß einer ersten Ausführungsvariante der Erfindung; und

Fig. 5A-D

mehrere Teilperspektivansichten eines Befestigungssystems einer Befestigungsstrebe des Gestells an der Sitzschale gemäß einer zweiten Ausführungsvariante der Erfindung.

The above and other features and advantages of the invention will be better understood from the following description of preferred, non-limiting exemplary embodiments with reference to the accompanying drawing. It shows, partly schematically:

Figs. 1A-D

Perspective views of chairs according to the present invention equipped with various frames;

Fig. 2

a bottom view of a seat shell of a chair according to an embodiment of the invention;

Figs. 3A-D

Bottom views of the seat shell according to Fig. 2 with the fastening struts of various frames in accordance with Figures 1A to D;

Fig. 4A-D

several partial perspective views of a fastening system of a fastening strut of the frame to the seat shell according to a first embodiment variant of the invention; and

Figs. 5A-D

several partial perspective views of a fastening system of a fastening strut of the frame on the seat shell according to a second embodiment variant of the invention.

Figs. 1A-D show examples of several variants of a chair according to the invention with the same seat and different frames.

The chairs 10 each have a seat 12, which has a seat shell 13 and a backrest 15 formed in one piece with this. The seat 12 is made, for example, as a blow molded shell made of plastic. The seat 12 is supported by a frame 16 which is attached to an underside 14 of the seat shell 13.

In Fig. 1A The frame 16 has two chair legs 17 in a C shape, which are connected to each other in the foot area and under the seat shell 13. In Fig. 1B The frame 16 has two chair legs 17 in an S shape, which are connected to each other in the foot area and under the seat shell 13. In Fig. 1C The frame 16 has four chair legs 17, which are connected to each other under the seat shell 13. In Fig. 1D The frame 16 has a support column 18 on a base 20. The invention is not limited to these four types of frame Figs. 1A-D limited; The concept according to the invention can also be used in an analogous manner with other types of frames, such as the so-called cantilever shape, etc.

Fig. 2 shows an example of an underside 14 of the seat shell 13 of the seat 12. An exemplary embodiment of a receiving profile 22 is provided in the underside 14 of the seat shell 13, which is used to fasten all frames 16 of Figs. 1A-D suitable is.

The receiving profile 22 is preferably formed by depressions or grooves in the underside 14 of the seat shell 13, so that it is essentially completely located within the thickness of the seat shell 13. The receiving profile 22 has a plurality of fastening sections 23, 24, each of which extends from a peripheral edge of the seat shell 13 into the interior of the seat shell 13. The two fastening sections 23 in the rear area of the seat shell 13 facing the backrest 15 each have a longitudinal direction 24; and the two fastening sections 25 in the front area of the seat shell 13 facing away from the backrest 15 each have a longitudinal direction 26. The fastening sections 23, 25 each begin at an access opening 27 on the peripheral edge of the seat shell 13.

Fig. 3A shows an example of the course of a fastening strut 19 of the frame 16 of the chair 10 from Fig. 1A . The fastening strut 19 is connected to the two chair legs 17 of the frame 16 or is formed in one piece with them and runs essentially parallel to the plane of the seat shell 13. The fastening strut 19 is received and runs essentially in a form-fitting manner in the receiving profile 22 in the underside 14 of the seat shell 13 through the first two fastening sections 23 of the receiving profile 22.

Fig. 3B shows an example of the course of a fastening strut 19 of the frame 16 of the chair 10 from Fig. 1B . The fastening strut 19 is connected to the two chair legs 17 of the frame 16 or is formed in one piece with them and runs essentially parallel to the plane of the seat shell 13. The fastening strut 19 is received and runs essentially in a form-fitting manner in the receiving profile 22 in the underside 14 of the seat shell 13 through the two second fastening sections 25 of the receiving profile 22.

Fig. 3C shows an example of the course of the fastening struts 19 of the frame 16 of the chair 10 from Fig. 1C . The fastening struts 19 are connected to the four chair legs 17 of the frame 16 or are formed in one piece with them and each run essentially parallel to the plane of the seat shell 13. The fastening struts 19 are accommodated essentially in a form-fitting manner in the receiving profile 22 in the underside 14 of the seat shell 13, wherein the one fastening struts 19 run through the two first fastening sections 23 of the receiving profile 22 and the other fastening struts 19 run through the two second fastening sections 25 of the receiving profile 22.

In the design variants of Figures 3A-C The fastening strut 19 of the frame 16 and also the respective terminal strip 30, 31 are embedded in the receiving profile 22 of the seat shell 13 or its fastening sections 23, 25. In other words, neither the fastening struts 19 nor the terminal strips 30, 31 protrude noticeably from the underside 14 of the seat shell 13, so that the underside 14 of the seat shell 13 also assembled frame 16 remains essentially flat. This has the advantage that - depending on the shape of the frame overall - stacking several chairs 10 on top of each other and / or placing a chair 10 with its seat 12 on a table top (so-called "chairing") can be done easily and without the risk of damage (esp. Scratching, etc.) of the lower chair 10 or the table top or the terminal strips 30, 31 are possible.

Fig. 3D shows an example of the attachment of the frame 16 of the chair 10 from Fig. 1D . The support column 18 is connected to a plurality of fastening struts 19 or is formed in one piece with them, each of which runs essentially parallel to the plane of the seat shell 13. The fastening struts 19 are accommodated essentially in a form-fitting manner in the receiving profile 22 in the underside 14 of the seat shell 13, with part of the fastening struts 19 running through the two first fastening sections 23 of the receiving profile 22 and another part of the fastening struts 19 running through the two second fastening sections 25 of the receiving profile 22 runs.

Referring to Fig. 4A-D The fastening of the frame 16 of the chair 10 is exemplified Fig. 1A on the seat shell 13 explained in more detail, the course of the fastening strut 19 in the receiving profile 22 of the seat shell 13 being shown in Fig. 3A corresponds.

In Fig. 4A the fastening section 23 of the receiving profile 22 is illustrated. The fastening section 23 is formed by a recess or groove in the underside 14 of the seat shell 13 and is therefore located completely within the thickness of the seat shell 13. The fastening section 23 has an access opening 27 on the peripheral edge of the seat shell 13, from which it runs along the longitudinal direction 24 runs parallel to the plane of the seat shell 13 into the interior of the seat shell 13. A plurality of guide edges 28a (first guide elements in the sense of the invention) are provided in the fastening section 23, which run essentially parallel to the longitudinal direction 24 of the fastening section 23. In the exemplary embodiment of Fig. 4 These guide edges 28a are provided on both sides with respect to the longitudinal direction 24 and each run in sections along the longitudinal direction 24. In the area below the guide edges 28a, the fastening strut 19 can be received in the fastening section 23 in a substantially form-fitting manner.

To clamp the fastening strut 19 in this fastening section 23 of the receiving profile 22, a clamping strip 30 is provided, which is exemplified in Fig. 4B is shown. The terminal strip 30 is made of a hard plastic, for example. The terminal strip 30 has a receiving profile 33, which can encompass a circumference of the fastening strut 19 in a substantially form-fitting manner.

As in Fig. 4C illustrated, the terminal strip 30 can be pushed into the fastening section 23 from the access opening 27 in the direction parallel to the longitudinal direction 24 of the fastening section 23. The fastening strut 19 (not shown in Fig. 4A-D ) in the fastening section 23 between the seat shell 13 and the terminal strip 30. The terminal strip 30 has guide grooves 34a (second guide element in the sense of the invention) on its outside, which run essentially parallel to the longitudinal direction 24 of the fastening section 23. These guide grooves 34a stand with the guide edges 28a on the fastening section 23 both during the insertion of the terminal strip 30 into the fastening section 23 and in the in Fig. 4C shown end position of the terminal strip 30 in the fastening section 23 engaged. In this way, the guide elements 28a, 34a support the insertion of the terminal strip 30 into the fastening section 23 and fix the terminal strip 30 in the direction perpendicular to the plane of the seat shell 13 in the fastening section 23 in order to clamp the fastening strut 19 of the frame 16 therein.

As in Fig. 4B-D shown, a first latching element 29 is also provided in the fastening section 23 and a second latching element 35 is also provided on the terminal strip 30. In the end position of the terminal strip 30 in the fastening section 23, these two locking elements 29, 35 engage with one another in order to lock the terminal strip 30 in the longitudinal direction 24 of the fastening section 23 therein.

The terminal strip 30 is thus locked in its end position in the fastening section 23 both in the direction perpendicular to the plane of the seat shell 13 and in the longitudinal direction 24 of the fastening section 23 and is thus fixed therein. The attachment of the fastening strut 19 of the frame 16 in the receiving profile 22 in the underside 14 of the seat shell 13 is thus secured.

Like in particular Fig. 4C recognizable, the recess of the receiving profile 22 or its fastening section 23 in this exemplary embodiment protrudes so deeply into the underside 14 of the seat shell 13 that the fastening strut 19 and also the terminal strip 30 are embedded in the receiving profile 22 or its fastening section 23, ie do not protrude noticeably from the underside 14 of the seat shell 13.

In order to simplify the insertion and locking of the terminal strip 30 into/in the fastening section 23, the terminal strip 30 optionally has an engagement groove 36 on its outside facing away from the seat shell 13. An auxiliary element, for example in the form of a bolt, can be pushed into this engagement groove 36 and then acted upon, for example with a hammer, in order to drive the terminal strip 30 into the fastening section 23.

Referring to Figs. 5A-D The fastening of the frame 16 of the chair 10 is exemplified Fig. 1B on the seat shell 13 explained in more detail, the course of the fastening strut 19 in the receiving profile 22 of the seat shell 13 being shown in Fig. 3B corresponds.

In Fig. 5A the fastening section 25 of the receiving profile 22 is illustrated. The fastening section 25 is formed by a recess or groove in the underside 14 of the seat shell 13 and is therefore located completely within the thickness of the seat shell 13. The fastening section 25 has an access opening 27 on the peripheral edge of the seat shell 13, from which it runs along the longitudinal direction 26 runs parallel to the plane of the seat shell 13 into the interior of the seat shell 13. A plurality of guide grooves 28b (first guide elements in the sense of the invention) are provided in the fastening section 25, which run essentially parallel to the longitudinal direction 26 of the fastening section 25. In the exemplary embodiment of Figs. 5A-D These guide grooves 28b are provided on both sides with respect to the longitudinal direction 26 and run along the longitudinal direction 26 over a partial section of the fastening section 25. In this fastening section 25, the fastening strut 19 can be received in a substantially form-fitting manner.

To clamp the fastening strut 19 in this fastening section 25 of the receiving profile 22, a clamping strip 31 is provided, which is shown, for example, in Fig. 5B is shown. The terminal strip 31 is made of a hard plastic, for example. The terminal strip 31 has a receiving profile 33, which can encompass a circumference of the fastening strut 19 in a substantially form-fitting manner.

As in Figures 5C and 5D illustrated, the terminal strip 31 can be pushed into the fastening section 25 from the access opening 27 in the direction parallel to the longitudinal direction 26 of the fastening section 25. The fastening strut 19 is located in the fastening section 25 between the seat shell 13 and the terminal strip 31. The terminal strip 31 has guide edges 34b (second guide element in the sense of the invention) on its outside, which run essentially parallel to the longitudinal direction 26 of the fastening section 25. These guide edges 34b are in contact with the guide grooves 28b in the fastening section 25 both during the insertion of the terminal strip 31 into the fastening section 25 and in the in Figures 5C and 5D shown end position of the terminal strip 31 in the fastening section 25 engaged. In this way, the guide elements 28b, 34b support the insertion of the terminal strip 31 into the fastening section 25 and fix the terminal strip 31 in the direction perpendicular to the plane of the seat shell 13 in the fastening section 25 in order to clamp the fastening strut 19 of the frame 16 therein.

As in Fig. 5B and 5C shown, a first latching element 29 is also provided in the fastening section 25 and a second latching element 35 is also provided on the terminal strip 31. In the end position of the terminal strip 31 in the fastening section 25, these two locking elements 29, 35 engage with one another in order to lock the terminal strip 31 in the longitudinal direction 26 of the fastening section 25.

The terminal strip 31 is thus locked in its end position in the fastening section 25 both in the direction perpendicular to the plane of the seat shell 13 and in the longitudinal direction 26 of the fastening section 25 and is thus fixed therein. The attachment of the fastening strut 19 of the frame 16 in the receiving profile 22 in the underside 14 of the seat shell 13 is thus secured.

In order to simplify the insertion and locking of the terminal strip 31 into/in the fastening section 25, the terminal strip 31 optionally has an engagement groove 36 on its outside facing away from the seat shell 13. An auxiliary element, for example in the form of a bolt, can be pushed into this engagement groove 36 and then acted upon, for example with a hammer, in order to drive the terminal strip 31 into the fastening section 25.

The features of the two design variants Fig. 4A-D and 5A-D can optionally be combined with each other.

The attachment of the frame 16 of the chair 10 from Fig. 1C or 1D on the seat shell 13 is a combination of the two fastenings Fig. 4A-D and 5A-D .

REFERENCE NUMBER LIST

10

Chair

12

Seat

13

Seat shell

14

Underside of the seat shell

15

backrest

16

frame

17

Chair legs

18

Support column

19

Fastening struts

20

Base

22

Recording profile

23

first fastening section of the receiving profile

24

Longitudinal direction of the first fastening section

25

second fastening section of the receiving profile

26

Longitudinal direction of the second fastening section

27

Access opening of the mounting section

28a

Leading edge in the fastening section

28b

Guide groove in the mounting section

29

Locking element in the fastening section

30

Terminal strip

31

Terminal strip

33

Mounting profile of the terminal strip

34a

Guide groove on terminal strip

34b

Guide edge on terminal strip

35

Locking element on terminal strip

36

Engagement groove on terminal strip

Claims (9)

1. Chair (10), comprising a seat (12) having a seat shell (13), and a frame (16) for supporting the seat (12), wherein

   the frame (16) comprises, on its side facing the seat (12), at least one fastening strut (19) running parallel to the plane of the seat shell (13);

   an underside (14) of the seat shell (13) facing the frame (16) comprises a receiving profile (22) for receiving at least a part of the fastening strut (19) of the frame (16); the receiving profile (22) comprises a fastening section (23, 25) which runs from a circumferential edge of the seat shell (13) parallel to the plane of the seat shell (13) into the interior of the seat shell (13), and has an access opening (27) at the circumferential edge of the seat shell (13); and

   there is provided a clamping strip (30, 31) for clamping the fastening strut (19) in the fastening section (23, 25) of the receiving profile (22) of the seat shell (13), which is insertable into the fastening section (23, 25) from the access opening (27) of the fastening section (23, 25) at the circumferential edge of the seat shell (13) on a side of the fastening strut (19) of the frame (16) facing away from the seat shell (13) in a direction parallel to a longitudinal direction (24, 26) of the fastening section, and is fixed in an end position of the clamping strip (30, 31) in the fastening section (23, 25) in a direction perpendicular to the plane of the seat shell (13),

   characterised in that

   the fastening section (23, 25) of the receiving profile (22) comprises a first latching element (29), and the clamping strip (30, 31) comprises a second latching element (35) which engages with the first latching element (29) on the fastening section (23, 25) in the end position of the clamping strip (30, 31) in the fastening section (23, 25) to latch the clamping strip (30, 31) in the longitudinal direction (24, 26) of the fastening section (23, 25).
2. Chair according to claim 1, wherein

   the fastening portion (23, 25) of the receiving profile (22) comprises a first guide element (28a, 28b) running parallel to the longitudinal direction (24, 26) of the fastening section (23, 25); and

   the clamping strip (30, 31) comprises a second guide element (34a, 34b) running parallel to the longitudinal direction (24, 26) of the fastening section (23, 25) and being engaged with the first guide element (28a, 28b) on the fastening section (23, 25) in the end position of the clamping strip (30, 31) in the fastening section (23, 25).
3. Chair according to claim 2, wherein the second guide element (34a, 34b) on the clamping strip (30, 31) is engaged with the first guide element (28a, 28b) on the fastening section (23, 25), even during inserting the clamping strip (30, 31) into the fastening section (23, 25).
4. Chair according to any of the preceding claims, wherein the fastening strut (19) of the frame (16) and the clamping strip (30, 31) are embedded in the receiving profile (22) of the seat shell (13).
5. Chair according to any of the preceding claims, wherein the clamping strip (30, 31) comprises, on its side facing the seat shell (13), a receiving profile (33) running parallel to the longitudinal direction (24, 26) of the fastening section (23, 25) and surrounding positive fitting a circumferential section of the fastening strut (19).
6. Chair according to any of the preceding claims, wherein the clamping strip (30, 31) comprises, on its side facing away from the seat shell (13), an engagement groove (36) in which an auxiliary element for inserting and latching the clamping strip (30, 31) can engage into or in the fastening section (23, 25) of the receiving profile (22).
7. Chair according to any of the preceding claims, wherein a plurality of clamping strips (30, 31) is provided for clamping the fastening strut (19) in a plurality of fastening sections (23, 25) of the receiving profile (22) of the seat shell (13).
8. Chair according to any of the preceding claims, wherein the frame (16) comprises a plurality of fastening struts (19), and at least one fastening section (23, 25) in the receiving profile (22) and at least one clamping strip (30, 31) are provided for each of the plurality of fastening struts (19).
9. Chair according to any of the preceding claims, wherein the receiving profile (22) comprises a plurality of different fastening sections (23, 25) for receiving fastening struts (19) of differently designed frames (16).

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