EP3337353B1 - Chair - Google Patents

Description

The invention relates to a chair with a pedestal and a hinged thereto carrier, which is coupled to a seat and this carries, wherein the seat is rotatable about an axis of rotation or pivotally connected between a sitting position and a raised position with the carrier and wherein the carrier Has at least one receiving area for the aligned investment of a bayed identical chair.

Office chairs are known whose seat, consisting of a seat and a backrest, is rotatably mounted about a vertically arranged axis on a pedestal. The pedestal can be designed as a base. Such a base is usually formed of four or five arms to which pivotally mounted rollers are attached. A disadvantage of such chairs is the large storage space they need for storage, since they can not be stacked.

From the DE 102 15 649 A1 is an office chair with a synchronous rocking mechanism known. The rocker mechanism allows simultaneous adjustment of the seat during an adjustment of the backrest of the chair. The chair is constructed of a tube frame, wherein a reference between the tubes is stretched and forms the seat or the backrest. According to one embodiment, the seat is rotatable in its rear area and directed obliquely upwards linear movably mounted. At the same time the seat is rotatably mounted in its front area. A second identical office chair can be pushed from behind into the first office chair. The seat of the second chair slides under the seat of the first chair and pushes it up along its linear guide. The seat thus forms reception areas, where a second chair can be joined. The arms of a base formed as a base of the chair are rearwardly higher at a node fastened than the forwardly directed arms, so that the front arms of the rear chair can be pushed under the rear arms of the front chair. It can be strung together as many office chairs. The disadvantage of the seat of the office chair must be made narrower than the backrest, so that the tubular construction of the seat between which the backrest can be inserted. This is at the expense of the seating comfort. It is also disadvantageous that receiving areas, on which a second chair can be lined up, are formed on the seat surface. This results in an increased wear of the seats when they rub against each other when inserting a chair. In particular, on the rear seats of a row of chairs, the entire weight of the front seats, so there is an increased burden with increased wear. This further makes it difficult to line up chairs from the back of the row of chairs because then the seat of the rearmost chair in the row must be raised against the heavy weight of the front chairs supported thereon. It is also possible that the rear chair is pushed by the obliquely acting, transmitted from the front seats force to the rear of the composite. The outer chairs of a row of chairs must therefore be secured against rolling away.

From the WO 2010/088671 A1 is a stackable and telescopically chair known. Two mutually spaced first frame parts form rear, mounted on rollers chair legs, which pass upwards in armrests. In between, there are also two further spaced apart, second frame parts arranged in a crossed manner relative to the first frame parts, which form the front, provided with rollers chair legs and carry the backrest in the upper area.

The seat of the chair is rotatably mounted in the opposite crossing points of the first and second frame parts and can be pivoted between a sitting position and an erect position. In the erected position identical chairs can be strung together, with the backrest of the front chair is based on the base of the seat of the rear chair. Alternatively, the chairs can be stacked on top of each other with the seats folded, with the rollers of the respective upper chair being guided along and mounted on the frame parts of the lower chair. The construction of the chair does not allow the use of a pedestal, so that it can not be realized with chairs with rotatably mounted seats.

• EP 1 192 878 A2 ,
• JP 2014 004353 A ,
• WO 99/59447 A1 ,
• DE 38 28 321 A1 .

Further examples from the prior art are given in the following documents:

• EP 1 192 878 A2 .
• JP 2014 004353 A .
• WO 99/59447 A1 .
• DE 38 28 321 A1 ,

It is therefore an object of the invention to provide a chair with a seat that can be queued to save space on other identical chairs without damaging the chair.

The object of the invention is achieved in that the seat is swung out in the raised position of the receiving area of the carrier and this freistellt. In the sitting position, the one-level seating surfaces prevent the chairs from being placed close together. In the erected position, the seat surface releases the receiving area, which is advantageously arranged on the support of the chair. In this case, it is moved so far away from the receiving area by the pivoting movement, that a provided for investment section of a chair to be adorned on the seat over, for example, under the established seat through, can be pushed to the receiving area. As a result, chairs can be pushed together and lined up to save space, without the seats abutting and wear out.

Advantageously, it can be provided that the carrier has an outwardly open inner receiving area and / or that the carrier has an outer receiving area and that the seat in the erected position the inner receiving area and / or the outer receiving area freistellt. Around To line up chairs, the inner and outer receiving areas can be designed so that the outer receiving area of one chair engages in the inner receiving area of a rowed chair. The chairs are so with their straps to each other, which were previously released by the erection of the seats. Advantageously, defined contact surfaces, for example made of plastic, can be applied to the inner and / or outer receiving region of the wearer of the chair. These contact surfaces can then form the stop between juxtaposed chairs. The seats or the backs of juxtaposed chairs and their covers do not come into contact with each other. It is also possible to manufacture the carrier partially or completely made of plastic. As a result, the wear can be minimized. An essential idea of the invention is that juxtaposed chairs only touch the carriers. Thus, the contact takes place only in a non-visible area of the chairs. Visible areas do not touch and are therefore not exposed to increased wear. By a suitable design of the inner and outer receiving areas, the mutual alignment of the chairs can be done by the contact of the wearer.

Suitable receiving areas can be obtained in that the carrier has two legs, that the legs are connected at one end and that the mutually facing portions of the legs at least a portion of the inner receiving portion and the opposite portions of the legs form at least a portion of the outer receiving portion , A support constructed in this way can be produced inexpensively. It allows for a secure support and support of the seat in their sitting position and on the other hand, the formation of suitable recording areas to build identical chairs next to each other.

If it is provided that the legs are at least partially U-shaped or V-shaped to each other, the chairs are aligned when juxtaposed against each other and centered. The legs can be executed straight, but also bent.

Preferably, it can be provided that the seat and a backrest of the chair are integrally connected to each other and / or that the seat and the backrest are made separately and that the backrest is attached directly or indirectly to the carrier. A one-piece seat and back can be inexpensively, for example, as a plastic molding produced. It is also possible, the seat and the backrest made of plywood, preferably made of molded plywood (mold) to produce. In such one-piece seats can advantageously be adjusted together with the seat backrest to get a favorable position for juxtaposing the chairs for both. A separately executed seat can be leaned in its raised position to the backrest and held by this in the erected position, without the need for additional components are required.

The seat can be pivoted out of the receiving area of the carrier in that the axis of rotation is formed by a hinge connection between the seat surface and the carrier and that the hinge connection in a front region of the seat, in particular along a front edge of the seat, or in a rear area the seat surface, in particular along a rear edge of the seat, is arranged. The arrangement of the axis of rotation between the carrier and the seat and along an edge of the seat is raised in its raised position completely over the carrier. As a result, the one or more receiving areas of the arranged below the established seat carrier are free.

In order to avoid that when rows of chairs abutting with their armrests, it may be provided that the chair two pivoting armrests are assigned and that the armrests pivot when adjusting the seat between the sitting position and the erected position. The armrests can thus be placed in a position that allows two chairs to be placed close together.

Advantageously, it can be provided that the seat is held independently in its raised position. Thus, no force must be applied to the adjoining chair to hold the seat of the chair to which it has been attached to its upright position. As a result, pressure points and increased wear can be avoided.

The unloaded seat can be held automatically in its erected position, that between the seat and the support at least one actuator, in particular a gas spring, is arranged, which acts with a directed from the sitting position in the established position force on the seat. At the same time, the actuator acts as a cushion when the seat is moved back to its sitting position.

According to a preferred embodiment variant of the invention, provision can be made for a stop to be arranged on the carrier on which the seating surface rests directly or indirectly in the sitting position such that the stopper forms part of the outer receiving area and / or part of the inner receiving area. and that the stopper is adapted to cooperate with a stop receiving a gefänghten chair. The stopper performs two functions. On the one hand, it serves as a safe and resilient support for the seat in its seating position. On the other hand, he intervenes in the receiving area of an adjoining chair and thus sets the correct position of the chairs to each other. This can prevent that chair parts accidentally abut each other and the chairs are damaged.

Advantageously, it may further be provided that a stop buffer is arranged on the seat surface, that the stop buffer rests in the seat position of the seat on the stop and / or that the stop buffer in the erected position of the seat in an Anreih direction to an adorned identical chair is aligned. Together with the stop, the stop buffer forms a secure and resilient support for the seat in its sitting position. The stop buffer may be made of an elastic material, in particular made of rubber. Thus, the stop buffer acts shock-absorbing with changing loads on the seat. In the erected position of the seat, the bumper shows in a direction from which another chair can be strung. If a chair is lined up, it can, for example, with its seat or its backrest, abut against the stop buffer of the adjacent chair. This adjusts the distance between the chairs so that they do not butt against one another and become damaged. If the stop buffer made of an elastic material, he intercepts the impact energy when rows of chairs. Premature wear of the chairs can thus be avoided. An additional contact between the bump stop and the seat or the back of juxtaposed chairs is particularly advantageous in shell chairs without padding, since no pressure points caused by the bump stop are caused here on the poster.

In order to be able to line up chairs, the footrests must not obstruct the way. This can be achieved by virtue of the fact that the base frame is rotatably connected to the carrier and that a locking device is effective between the base frame and the carrier such that at least in the erected position of the seating surface the base frame and the carrier are aligned in a predetermined rotational position. In the predetermined rotational position of the carrier with the seat and the pedestal are aligned against each other so that a chair can be applied to the receiving area of a second chair and at the same time the pedestals can be pushed into each other. It can be provided as a chair with a rotatable about a vertical axis seat, which can be arranged to save space to other identical chairs.

The pedestal and the seat of the chair can thereby be automatically aligned against each other, that according to the invention the pedestal is connected to the carrier rotatable about a second axis of rotation and biased against gravity and that coupled to the carrier locking member upon relief of the seat in a centering of the pedestal intervenes. Once the seat is relieved The carrier is aligned with the seat relative to the Fußgestellt in such a way that the chair can be queued to a chair of the same design.

According to a preferred embodiment of the invention, it may be provided that the pedestal is formed by a base, that arms of the pedestal are laterally offset to each one of a node of the pedestal outgoing radial line attached to the node and that the feet in a direction of rotation to the node to the respective radial line are arranged. Chairs with such executed Fußkreuzen can be pushed together with a suitable alignment of the Fußkreuze and thus strung together. The locking can be done as previously described. Preferably, the foot crosses are aligned in a locked position so that one arm of the base, relative to the seat of the chair, facing forward, one to the rear and two more to each opposite sides of the chair show. By arranging the arms at the node, the rear arm of a front chair and the front arm of a rear row chair are offset laterally. The chairs can be strung together, with the mutually facing arms of the frames are pushed past each other. Advantageously, the arms, starting from the node, are aligned obliquely downwards. The front and / or rear arm of a chair can thus be pushed under a lateral arm of an adjoining chair.

Fig. 1

in einer Seitenansicht einen Stuhl in einer Sitzposition,

Fig. 2

den in Figur 1 gezeigten Stuhl in einer Ansicht von unten,

Fig. 3

in einer Seitenansicht zwei baugleiche aneinandergereihte Stühle entsprechend Figur 1,

Fig. 4

die in Figur 3 gezeigten Stühle in einer perspektivischen Seitenansicht,

Fig. 5

eine zwischen einem Träger und einem Fußgestell angeordnete Sitzlagerung in einer perspektivischen, teilweise als Schnittdarstellung ausgeführten Ansicht,

Fig. 6

in einer perspektivischen Ansicht eine Wellenscheibe,

Fig. 7

in einer Seitenansicht einen Stuhl mit getrennt ausgeführter Sitzfläche und Rückenlehne und

Fig. 8

in einer perspektivischen Seitenansicht zwei baugleiche aneinandergereihte Stühle entsprechend Figur 7.

A possible variant of the invention is such that the carrier protrudes beyond the second axis of rotation and that the inner and the outer receiving area are arranged at least in sections on the projecting carrier area. In addition to the linear guide as a radial guidance of the juxtaposed chairs is possible, which prevents twisting individual chairs.

Fig. 1

in a side view a chair in a sitting position,

Fig. 2

the in FIG. 1 shown chair in a view from below,

Fig. 3

in a side view two identical juxtaposed chairs accordingly FIG. 1 .

Fig. 4

in the FIG. 3 shown chairs in a perspective side view,

Fig. 5

a arranged between a support and a pedestal seat bearing in a perspective, partially executed as a sectional view view,

Fig. 6

in a perspective view a wave washer,

Fig. 7

in a side view of a chair with separately executed seat and backrest and

Fig. 8

in a perspective side view of two identical juxtaposed chairs accordingly FIG. 7 ,

FIG. 1 shows in a side view a chair 10 in a sitting position. A seat 11 and a backrest 12 of the chair 10 are made in one piece. For this purpose, the seat 11 and the backrest 12 are connected to each other via an integrally formed arcuate portion. On the backrest 12 armrests 13 are fixed by means of a bracket 13.1.

The seat 11 is mounted on a carrier 20. The carrier 20 has a connecting portion 23 on which in FIG. 2 shown legs 21, 22 are attached. The legs 21, 22 are preferably integrally connected to the connecting portion 23. Opposite to the legs 21, 22 a stop 25 is attached to the connecting portion 23 via a connecting web 24. Also, the connecting web 24 and the stopper 25 are preferably integrally connected to the connecting portion 23. A stop surface of the Stop 25 is aligned with the seat surface 11. Opposite to the stop 25, a stop buffer 14 is attached to the seat 11. The stop buffer 14 is in the sitting position of the seat 11 on the stopper 25. The directed to the side outer contour of the carrier 20 forms at least in sections an outer receiving portion 29 with outer bearing portions 29.1. In this case, the outer receiving region 29 is formed at least by partial sections of the legs 21, 22 and the stop 25. By appropriate shaping of the carrier 20 and the connecting portion 23 and the connecting web 24 can be designed as part of the outer receiving portion 29.

The seat 11 is pivotally connected to the carrier 20 about an axis of rotation 30. The axis of rotation 30 is defined by two hinge elements 31, 32, as shown in FIG FIG. 2 are shown formed. The hinge members 31, 32 are disposed below the front edge of the seat 11 and at the front ends of the legs 21, 22 of the carrier 20. The axis of rotation 30 thus extends below the front edge of the seat 11th

Between the seat 11 and the carrier 20 are spaced from each other two adjusting elements 33, 34 arranged in the form of gas pressure springs, as in FIG. 2 is shown. The adjusting elements 33, 34 are fastened by means of carrier-side holding elements 33.1, 34.1 on the legs 21, 22 of the carrier 20 pivotally. The adjusting elements 33, 34 are further connected by means of seat-side holding elements 33.2, 34.2 with the underside of the seat surface 11 articulated.

The carrier 20 is connected via a seat bearing 50 with a pedestal 40. The seat bearing 50 allows a rotation of the carrier 20 about a vertically arranged second axis of rotation 57th

The pedestal 40 is formed as a base. It has a node 41, are attached to the arms 42.1, 42.2, 42.3, 42.4 of the pedestal 40. The arms 42.1, 42.2, 42.3, 42.4 are, starting from the node 41, aligned obliquely downward and bent at their ends downwards. On each arm 42.1, 42.2, 42.3, 42.4 end is a chair roller 43, in the embodiment shown in the form of a double role, arranged. The chair rollers 43 are pivotally connected about an axis with the arms 42.1, 42.2, 42.3, 42.4.

The arms 42.1, 42.2, 42.3, 42.4 are laterally offset to each of an imaginary, radial outgoing from the node 41 radial line. In the exemplary embodiment shown, the arms 42.1, 42.2, 42.3, 42.4 are fastened approximately tangentially to the node 41. The arms 42.1, 42.2, 42.3, 42.4 are all offset in one direction of rotation relative to the respective radial lines. As in particular in FIG. 2 can be seen, the arms 42.1, 42.2, 42.3, 42.4 are offset in the embodiment shown in a view from below in the clockwise direction relative to the radial lines.

By integrally connected seat 11 and backrest 12 an ergonomically shaped seat is created. The seat 11 and the backrest 12 are preferably and at least partially formed as a plastic molding. The plastic molding may be at least partially covered with a cover and padded. It is also possible that the seat 11 and the backrest 12 made of plywood, in particular made of molded plywood (mold) exist. These may also be completely or partially covered with a cover and padded. According to a possible, not shown embodiment of the invention, it may further be provided that the armrests are integrally connected to the backrest 12 and / or the seat surface 11. Thus, for example, a seat with backrest 12 and seat 11 may be formed, which also has a trained for the armrest zone. In this way, the manufacturing cost of the chair 10 can be further reduced.

About the hinge elements 31, 32, the seat surface 11 is pivotally connected to the carrier 20. In the in FIG. 1 shown seating position, the seat surface 11 is in its rear region with the attached stop buffer 14 on the stop 25 of the carrier 20. This ensures a stable and resilient mounting of the seat 11 in the sitting position. The adjusting elements 33, 34 exert a force on the Seat 11 off. The force is aligned so that they the seat 11 in a in FIG. 3 shown erected position moves. The force of the adjusting elements 33, 34 can be adjusted so that it presses the seat 11, together with the molded-back 12, automatically in the erected position or that an additional manual support is required. In the latter case, the force is preferably adjusted so that the adjusting elements 33, 34 can hold the seat 11 in the erected position.

The seat 11 can thus be moved about the axis of rotation 30 between a sitting position and a raised position. In this case, the backrest 12 is adjusted with. Also attached to the backrest 12 armrests 13 are pivoted. By the adjusting elements 33, 34, the seat 11 is held in the raised position.

The seat bearing 50 is designed so that the carrier 20 and thus the seat 11 with the backrest 12 relative to the pedestal 40 can rotate about the axis of rotation 57. By the chair rollers 43 attached to the arms 42.1, 42.2, 42.3, 42.4, the chair 10 can be rolled and thus the position of the chair 10 can be changed.

FIG. 2 shows the in FIG. 1 shown chair 10 in a view from below. The seat 11 merges integrally into the backrest 12. On the backrest 12 of the bracket 13.1 is secured by means of bracket holders 13.2 on the backrest 12. The bracket 13.1 carries the armrests 13th

The illustration clearly shows the V-shaped alignment of the two legs 21, 22 of the carrier 20. In an alternative embodiment of the invention, the legs 21, 22 may also be aligned in a U-shape. You can also each have a different shape from the straight shape, for example, arcuate. Between the legs 21, 22, an inner receiving portion 28 is formed. The mutually facing regions of the legs 21, 22 form inner abutment areas 28.1 of the inner receiving area 28. The areas facing away from each other Legs 21, 22 form at least part of the outer receiving region 29 with the outer contact surface 29.1. The inner and the outer receiving area 28, 29 are formed corresponding to each other. Thus, as will be shown later, a second chair 10 is attached to the first chair 10 with the outer seating area 29 of one chair 10 received by the inner seating area 28 of the other chair 10. In this case, the contact areas 28.1, 29.1 at least partially abut each other.

FIG. 3 shows in a side view two identical juxtaposed chairs 10 accordingly FIG. 1 , FIG. 4 shows the in FIG. 3 shown chairs in a perspective side view. As can be seen in the two figures, the seats 10 are adjusted to their upright position. They are held by the adjusting elements 33, 34 in this position. The associated with the seats 11 backrests 12 are also displaced in their position and thereby aligned obliquely forward inclined. As a result, the armrests 13 are adjusted and arranged obliquely. The seats formed by the seats 11 and the backrests 12 can thus be pushed into one another. In this case, the seats 11 and the armrests 13 by their oblique orientation, the space for joining a further seat 11 and other armrests 13 free. In the illustrated embodiment is in tiered chairs 10 of the stop buffer 14 of the front chair 10 on the seat 11 of the rear chair 10 at. He thus, together with the abutting supports 20, a desired distance between the chairs 10 a. This prevents the chairs 10 from abutting each other with areas not intended for this purpose and scratching or wearing them at these points. The stop buffer is preferably made of an elastic material, in particular made of rubber or as a rubber-metal composite component. According to an alternative embodiment of the invention, it may also be provided that the stop buffer 14 of the front chair 10 does not touch the adjoining rear chair 10. As a result, caused by the stop buffer 14 pressure points, for example, on a seat upholstery of tiered chair 10 can be avoided.

As in particular in FIG. 4 To recognize the carrier 20 of the juxtaposed chairs 10 interlock. In this case, the carrier 20 of the front chair 10 moves with its outer receiving area 29 into the inner receiving area 28 of the carrier 20 of the rear chair 10. The seat of the front chair 10 has to release the outer receiving portion 29 of its carrier 20 by its erected position. The carrier 20 is bent towards the front of the chair 10 upwards. The rotation axis 30 of the rear chair 10 is above the rack level of the outer receiving portion 29 of the front chair 10. Due to the arrangement of the axis of rotation 30 below the edge of the seat 11 is when erecting the seat 11 no portion of the seat 11 down in the field of Shaft level worked out. As a result, the inner receiving area 29 remains exposed when the seat 11 is in an upright position. By these measures, the carrier 20 of the front chair 10 can be pushed under the front edge of the seat 11 of the rear chair 10 and inserted into the inner receiving portion 28 of the rear chair 10. The chair 10 according to the invention thus makes it possible that identical chairs 10 can be lined up both from the front and from the back. In this case, no forces act on stacked chairs 10 in the rolling direction of the chairs 10, which press them apart. Accordingly, a chair row formed in this way does not have to be secured against rolling the chairs 10 apart.

The stop buffer 14 of the front chair 10 is supported on the seat 11 of the rear chair 10. This avoids that the seats of the juxtaposed chairs abut each other or rub against each other and thereby damaged.

The inner receiving portion 28 forms at the junction of the legs 21, 22 a stop receiving 27. In juxtaposed chairs 10, the stop 25 of the front chair 10 engages in the stop receptacle 27 of the rear chair 10 a. By the stop receiving 27 and the stop 25 is thus determined how far a carrier 20 of a front chair 10 with its outer receiving portion 29 in the inner receiving portion 28 of a rear chair 10th can be inserted. Two adjoining chairs 10 are thus defined between the stop 25 and the stop receptacle 27 and, depending on the design of the stop buffer 14, between the seat 11 and the stop buffer 14 to each other. In addition, lateral aligned portions of the inner and outer abutment portions 28.1, 29.1, preferably in the region of the legs 21, 22, abut each other. As a result, a lateral guidance of the juxtaposed chairs 10 is ensured.

The pedestal 40 is aligned with the mounted position of the seat 11 relative to the carrier 20 and the seat 11 arranged thereon. In this case, the orientation is such that the first arm 42.1, based on the orientation of the seat 11, is oriented towards the front and the fourth arm 42.4 towards the rear. The second and the third arm 42.2, 42.3 are laterally away. To align the pedestal 40 relative to the support 20 with the seat surface 11, a locking device is provided on the seat support 50, which adjusts the described orientation and determines how this closer to the FIGS. 5 and 6 is described. By the to FIG. 2 described lateral arrangement of the arms 42.1, 42.2, 42.3, 42.4 at the node 41 are the rearwardly facing fourth arm 42.4 of the front chair 10 and the forward-facing first arm 42.1 of the rear chair 10 laterally offset from each other. They can be pushed past each other when rows of chairs 10 together.

• die Aufnahmebereiche 28, 29 der Träger 20 werden freigestellt,
• der Sitze 11 wird in der aufgestellten Position gehalten,
• die Armlehnen 13 werden schräg angeordnet und
• die seitlich versetzt angeordneten Arme 42.1, 42.2, 42.3, 42.4 werden bezogen auf den Träger 20 und die Sitzfläche 11 ausgerichtet.

By putting the seat 11 in the erected position, the following is achieved in summary:

• the receiving areas 28, 29 of the carriers 20 are released,
• the seats 11 are held in the erected position,
• the armrests 13 are arranged obliquely and
• the laterally offset arms 42.1, 42.2, 42.3, 42.4 are aligned relative to the carrier 20 and the seat 11.

This makes it possible, as many similar chairs 10 to string together to save space. The chairs 10 are only in predetermined locations in contact, so that no unintentional wear on other abutting Chair components done. Since the seat 11 is automatically held in the erected position, no mechanical load is transferred to an adjoining chair 10 and thus also the wear or the risk of damaging a chair 10 is kept low. Other chairs 10 can be attached to a chair row from the front or from the back.

FIG. 5 shows a arranged between the support 20 and the pedestal 40 seat bearing 50 in a perspective, partially executed as a sectional view view.

The illustrated in section node 41 of the pedestal 40 has a bolt receptacle 41.2 in the form of a longitudinal bore. On a side facing the seat 11 of the node 41 a bearing seat 41.1 is introduced. The bearing receptacle 41.1 is designed as the bolt receptacle 41.2 circumferential groove. Opposite to the bearing receptacle 41.1 a wave disk holder 41.1 is embedded in the node 41. On the side arm holders 41.4 are formed on the node 41, of which only one can be seen in the selected representation. In the arm mounts 41.4, the arms 42.1, 42.2, 42.3, 42.4 are inserted and secured therein. In the selected illustration, only the first arm 42.1 is shown. The arm mounts 41.1 are tangentially formed on the node 41.

By the bolt holder 41.2 a bolt 51 is guided. To the seat surface 11 toward a sleeve 52 is pushed with a molded flange 52.1 on the bolt 51 and connected to this with the bolt 51. On the opposite side two locking elements 56 are attached to the bolt 51. The locking elements 56 are designed as diametrically attached to the bolt 51 and rotatably mounted rollers.

In the bearing seat 41.1 of the node 41, a thrust bearing 54 is inserted. The thrust bearing 54 is designed as a roller bearing. It has a first and a second housing disk 54.1, 54.2, the second housing disk 54.2 being held in the bearing receptacle 41.1. On the thrust bearing 54 is a compression spring 53. Opposite the compression spring 54 abuts against the flange 52.1 of the sleeve 52. The flange 52.1 is not shown connected to the carrier 20.

In the wave disk holder 41.3 of the node 41, a wave washer 55 is fixed. FIG. 6 shows the wave washer 55 in a perspective view from below. The wave washer 55 has a central bore 55.1, in which, as in FIG. 5 shown, the bolt 51 is guided. The wave washer 55 has the locking elements 56 facing a centering 55.2, each with four successive Kurventälern 55.3 and Kurvenbergen 55.4. Opposite to the centering curve 55.2, the wave washer 55 is closed by a radially oriented support surface 55.5. As in FIG. 5 shown, the wave washer 55 rests with the support surface 55.5 at the node 41, while the centering 55.2 is aligned to the locking members 56 out.

The function of the seat 50 is based on FIG. 5 described. Shown is the seat bearing 50, as it is present in a loaded seat. The bolt 51 is fixed to the sleeve 52, wherein the flange 52.1 of the sleeve 52 carries the carrier 20 and thus the seat 11. The compression spring 53 biases the sleeve 52 relative to the node 41 and thus the carrier 20 relative to the pedestal 40 before. When loaded seat 11, for example by a person sitting, the bolt 51 is pressed against the spring force down and thereby brought the locking elements 56 from the engagement of the centering 55.2 of the wave washer 55. The bolt 51 and thus the seat of the chair 10 can now be rotated about the second axis of rotation 57. About the sleeve 52 and the compression spring 53, the carrier 20 is mounted with the seat 11 on the thrust bearing 54, whereby a smooth rotational movement is achieved. The bolt 51 is guided radially in the central bore 55.1 of the wave washer 55, whereby a tilting of the bolt 51 and thus the seat surface 11 is avoided. When relieved seat 11, the compression spring 53 presses the accounts 41 and the sleeve 52 apart with the bolt 51 attached thereto. As a result, the locking elements 56 are pressed against the centering cam 55.2 of the wave washer 55. The running as a rotatably mounted rollers locking elements 56 thereby roll from the Kurvenbergen 55.4 in the Kurventäler 55.3. Thereby, the seat of the chair 10 with the seat 11 and the backrest 12 is aligned with respect to the pedestal 40. In the wave washer 55 shown, four equivalent orientations result. The wave washer 55 is aligned with the node 41 so that an alignment of the arms 42.1, 42.2, 42.3, 42.3 as shown in the Figures 3 and 4 is described in unloaded chair 10 is present.

In an alternative embodiment of the invention, it may be provided that the centering curve 55.2 is formed directly in the node 41, for example in the region of the shaft washer receptacle 41.3 shown. The locking elements 56 then engage, as described for the wave washer 55, in this centering 55.2. On a wave washer 55 as an additional component can be dispensed with. The node 41 is then advantageously made of a loadable material, in particular of metal, particularly preferably as a die-cast component.

FIG. 7 shows a side view of a chair 10 with separately executed seat 11 and backrest 12th FIG. 8 shows in a perspective side view of two identical juxtaposed chairs 10 accordingly FIG. 7 ,

Notwithstanding that in the FIGS. 1 to 4 shown chair 10, the seat 11 and the backrest 12 are designed and held separately. For this purpose, the carrier 20 with respect to the in the FIGS. 1 to 4 shown chair 10 rotated by 180 °, so that now the opening of the inner receiving portion 28 to the rear to the backrest 12 shows. The legs 21, 22 of the carrier 20 are extended beyond the seat 11 and out there bent upwards. The bent areas form backrest holder 12.1, to which the backrest 12 is attached. Apart from these changes, the carrier 20 is equal to that in the FIGS. 1 to 4 constructed carrier 10 constructed.

The seat 11 is connected to the carrier 20 by means of a third hinge element 36 and a fourth hinge element (not shown). The third and fourth hinge members 36 are aligned so that the rotation axis 30 below the rear edge of the seat 11 extends. The seat 11 can be folded around the axis of rotation 30 upwards. In its erect position, the seat 11 rests against the backrest 12. The angle of the seat 11 is selected so that the unfolded seat 11 remains in the raised position.

The stop buffer 14 is arranged in the center region of the seat surface 11 and lies in the sitting position of the seat surface 11 on the stopper 25. With the seat 11 and the chairs 10 lined up, the stop buffer 14 of the rear chair 10 rests against the backrest 12 of the front chair 10. This adjusts the correct distance between the chairs 10 and prevents the chairs 10 from butting undefined and being damaged.

The pedestal 40 and the seat support 50 are the same in construction and function as in the FIGS. 1 to 6 shown and described.

Also in the in the FIGS. 7 and 8th shown chair 10, the outer receiving portion 29 of the carrier 20 is released when folded seat 11. By positioning the axis of rotation 30 along the edge of the seat 11 and the inner receiving portion 28 of the chair 10 is released with the seat 11 and is not covered by downwardly wegklappenden areas of the seat. Thus, chairs 10 can be strung together in the manner described. In this case, the outer receiving area 29 of the carrier 20 of the rear chair 10 is inserted into the inner receiving area 28 of the carrier 20 of the front chair 10. The stop 25 of the carrier 20 of the rear chair 10 is inserted into the stop receptacle 27 of the carrier 20 of the front chair 10. This results in a relative positioning of juxtaposed chairs 10 to each other. Furthermore, lateral guidance of the chairs 10 takes place through lateral sections of the inner and outer contact areas 28.1, 29.1, on which the carriers 20 rest against one another. As a result, a straight row of aligned chairs 10 is obtained. Advantageously, the seats 11 are held independently in the raised position, so that no forces transmitted to adjacent chairs 10 and thereby increased wear is caused.

Claims (14)

1. A chair (10) having a base frame (40) and a support (20) hinged thereto which is coupled to and supports a seating surface (11), wherein the seating surface (11) is connected to the support (20) rotatably or pivotably about an axis of rotation (30) between a sitting position and an erect position, wherein the support (20) has at least one receiving region (28, 29) for aligned abutment of an adjacently arranged structurally identical chair (10), and wherein the seating surface (11) in the erect position is pivoted out from the receiving region (28, 29) of the support (20) and releases same,
   characterised in that
   the base frame (40) is connected to the support (20) rotatably about a second axis of rotation (57) and prestressed against the force of gravity and that a locking element (56) coupled to the support engages in a centring curve of the base frame (40) when the seating surface (11) is unloaded.
2. The chair (10) according to claim 1,
   characterised in that
   the support (20) has an outwardly open inner receiving region (28) and/or that the support (20) has an outer receiving region (29) and that the seating surface (11) in the erect position releases the inner receiving region (28) and/or the outer receiving region (29).
3. The chair (10) according to claim 1 or 2,
   characterised in that
   the support (20) has two legs (21, 22), that the legs (21, 22) are connected at one end and that the regions of the legs (21, 22) facing towards each other form at least one portion of the inner receiving region (28) and the regions of the legs (21, 22) facing away from each other form at least one portion of the outer receiving region (29).
4. The chair (10) according to one of claims 1 to 3,
   characterised in that
   the legs (21, 22) are arranged at least in regions in a U-shape or V-shape with respect to each other.
5. The chair (10) according to one of claims 1 to 4,
   characterised in that
   the seating surface (11) and a backrest (12) of the chair (10) are integrally connected to each other or that the seating surface (11) and the backrest (12) are configured separate and that the backrest is attached directly or indirectly to the support (20).
6. The chair (10) according to any one of claims 1 to 5,
   characterised in that
   the axis of rotation (30) is formed by a hinge connection between the seating surface (11) and the support (20) and in that the hinge connection is arranged in a front region of the seating surface (11), in particular along a front edge of the seating surface (11), or in a rear region of the seating surface (11), in particular along a rear edge of the seating surface (11).
7. The chair (10) according to one of claims 1 to 6,
   characterised in that
   two pivotable armrests (13) are associated with the chair (10) and that the armrests (13) pivot between the sitting position and the erect position when the seating surface (11) is adjusted.
8. The chair (10) according to one of claims 1 to 7,
   characterised in that the seating surface (11) is held independently in the erect position thereof.
9. The chair (10) according to one of claims 1 to 8,
   characterised in that
   at least one adjusting element (33, 34), in particular a gas pressure spring, is arranged between the seating surface (11) and the support (20), which adjusting element acts on the seating surface (11) with a force directed from the sitting position into the erect position.
10. The chair (10) according to one of claims 2 to 9,
    characterised in that
    a stop (25) is arranged on the support (20), on which stop the seating surface (11) rests directly or indirectly in the sitting position such that the stop (25) forms a part of the outer receiving region (29) and/or a part of the inner receiving region (28), and that the stop (25) is designed to interact with a stop receiver (27) of an adjacently arranged chair (10).
11. The chair (10) according to claim 10,
    characterised in that
    a stop buffer (14) is arranged on the seating surface (11), that the stop buffer (14) in the sitting position of the seating surface (11) rests on the stop (25) and/or that in the erect position of the seating surface (11) the stop buffer (14) is aligned in an adjacent direction to a structurally identical chair (10) to be arranged adjacently.
12. The chair (10) according to one of claims 1 to 11,
    characterised in that
    the base frame (40) is rotatably connected to the support (20) and that between the base frame (40) and the support (20) a locking device is effective such that, at least in the erect position of the seating surface (11), the base frame (40) and the support (20) are aligned in a predetermined rotational position with respect to each other.
13. The chair (10) according to one of claims 1 to 12,
    characterised in that
    the base frame (40) is formed by a cruciform base, that arms (42.1, 42.2, 42.3, 42.4) of the base frame (40) are each laterally offset with respect to a radial line emanating from a node (41) of the base frame (40) and attached at the node (41), and that the feet (42.1, 42.2, 42.3, 42.4) are arranged to the respective radial lines in a circumferential direction to the node (41).
14. The chair (10) according to one of claims 2 to 13,
    characterised in that
    the support (20) projects beyond the second axis of rotation (57) and that the inner and the outer receiving regions (28, 29) are arranged at least in sections on the projecting support region.

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